WO2025206997A1

WO2025206997A1 - Chainsaw cutting link, saw chain, and chainsaw

Info

Publication number: WO2025206997A1
Application number: PCT/SE2025/050244
Authority: WO
Inventors: Hans-Åke SUNDBERG; Jens ELMWALL
Original assignee: Husqvarna AB
Current assignee: Husqvarna AB
Priority date: 2024-03-28
Filing date: 2025-03-18
Publication date: 2025-10-02
Anticipated expiration: 2026-09-28
Also published as: SE547717C2; SE2450343A1

Abstract

A chainsaw cutting link (1, 1') is disclosed. The chainsaw cutting link (1, 1') is configured to move along a movement direction (md) in a cutting plane (Pc) during cutting. The cutting link (1, 1') comprises a base portion (2) and a side plate (5) and a top plate (4) defining an angle to form an L-shaped cutting tooth (3) extending away from the base portion (2). The top plate (4) comprises a top side (6') facing in a direction (d1) away from the base portion (2), a lower side (7') facing in a direction (d2) towards the base portion (2), and a lateral side (9') connecting the top side (6') and the lower side (7'). The lateral side (9') comprises a lateral side surface (9) being angled with an angle (a1) relative to the cutting plane (Pc) as measured in a plane (P1) perpendicular to the movement direction (md). The present disclosure further relates to saw chain (30) and a chainsaw (40).

Description

Chainsaw Cutting Link, Saw Chain, and Chainsaw

TECHNICAL FIELD

The present disclosure relates to a chainsaw cutting link. The present disclosure further relates to a saw chain for a chainsaw, as well as a chainsaw comprising a saw chain.

BACKGROUND

A chainsaw is a tool that includes a drive unit, a guide bar, and a saw chain. The saw chain is movably arranged around a perimeter of the guide bar, allowing for cutting action when the drive unit moves the saw chain around the guide bar.

The saw chain comprises a number of chainsaw cutting links each comprising a cutting tooth configured to perform a cutting operation during the movement of the saw chain around the guide bar. Moreover, the saw chain normally comprises a plurality of guide members that rides in a guide bar groove provided along the periphery of the guide bar. The guide bar groove in the guide bar accommodates these guide members which helps in guiding the saw chain as it moves around the guide bar, preventing it from slipping off.

Each cutting tooth of a chainsaw saw chain is normally designed with a side plate and a top plate that together define an angle, creating an L-shaped cutting tooth that extends away from a body portion of the cutting link. Moreover, normally, each of the side plate and top plate is provided with a sharp cutting edge facing in a movement direction of the chainsaw cutting link around the guide bar.

The purpose of the top plate cutting edge is to shave off a chip from the material to be cut, whereas a purpose of the side plate cutting edge is to cut off e.g. any fibres within the material, which fibres may be parallel to the top plate cutting edge such that they are not cut off by the top plate cutting edge, to obtain a clean cut without tearing. Another purpose of the side plate is to stabilize the cutting tooth as it slices through the material to be cut, to provide precision and stability during the cut.

This drive unit of the chainsaw can either be an internal combustion engine or an electric machine, each with its own set of benefits and limitations. An internal combustion engine provides high mobility and power, making it suitable for extensive outdoor use without the need for electrical power sources. However, it also produces emissions, is noisier, and requires more maintenance compared to its electric counterpart. On the other hand, an electric machine offers a quieter operation with fewer emissions, making it ideal for indoor use or in environmentally sensitive areas. It also tends to be lighter and easier to maintain.

Three different problem areas have been identified in the cutting performance of a saw chain. Below, these are denoted curved cuts, micro stops, and stop feeding.

Curved cuts refer to a phenomenon where the chainsaw produces a cut that deviates from a straight line, resulting in an arc or curve rather than a linear cut through the material. This issue often arises due to wear and increased width in the guide bar groove or changes in the dimensions of the cutting tooth, particularly after repeated sharpening, which can alter the width of the cutting tooth. This can lead to uneven cutting forces being applied across the saw chain. This imbalance may cause the saw chain to drift off a straight path, creating a curved cut. Such cuts are not only inefficient but can also compromise the safety and precision of chainsaw operations.

Micro stops, a phenomenon where cutting momentarily halts, present a challenge especially for electric chainsaws, which seem more susceptible than chainsaws powered by a combustion engine. This is believed to stem from differences in torque characteristics, although the way operators manage feeding force also plays a significant role. Frequent micro stops, especially during self-feeding cuts, can greatly affect the chainsaw's ability to cut effectively.

Stop feeding refers to occurrences in which the saw chain is moved against the material to be cut but without effectively removing chips therefrom. Stop feeding occurrences normally increase the operation speed of the drive unit, and thereby also the movement speed of the saw chain around the guide bar. Moreover, normally, excessive heat is generated between the saw chain and the material to be cut due to friction therebetween during stop feeding occurrences. Problems of stop feeding occurrences may coincide with the curved cut issue but can also occur with new guide bars and chains. Adjusting the feeding force often proves ineffective. Instead, sometimes shaking the chainsaw slightly can help to reinitiate chip removal. Observations indicate that the length of the kerf, along with the wood's humidity level and whether it is frozen, affects this problem, which becomes particularly troublesome during outdoor cutting operations.

SUMMARY It is an object of the present invention to overcome, or at least alleviate, at least some of the above-mentioned problems and drawbacks. The object is achieved by the subject-matter of the appended independent claim(s).

According to a first aspect of the present disclosure, the object is achieved by a chainsaw cutting link configured to move along a movement direction in a cutting plane during cutting. The cutting link comprises a base portion provided with two rivets holes for pivotal interconnection with adjacent links, each of said rivet hole defining a respective pivot axis. The cutting link further comprises a side plate and a top plate defining an angle to form an L- shaped cutting tooth extending away from the base portion. The top plate comprises a top side facing in a direction away from the base portion, a lower side facing in a direction towards the base portion, and a lateral side connecting the top side and the lower side. The lateral side comprises a lateral side surface being angled with an angle relative to the cutting plane as measured in a plane perpendicular to the movement direction.

Thereby, a chainsaw cutting link is provided having conditions for an improved cutting performance. This is because, as realized by the inventors of the present disclosure, by providing the lateral side of the top plate with a lateral side surface being angled with an angle relative to the cutting plane, as measured in the plane perpendicular to the movement direction, occurrences of stop feeding, and micro stops, can be reduced.

As a further result, since the chainsaw cutting link can reduce problems of micro stops, a chainsaw cutting link is provided having conditions for improving the cutting efficiency of an electrically driven chainsaw in a simple and cost-effective manner.

In addition, as realized by the inventors of the present disclosure, the lateral side surface being angled with an angle relative to the cutting plane, as measured in the plane perpendicular to the movement direction, can reduce problems of curved cuts due to an improved guiding performance of the cutting link through a cutting kerf thereby providing conditions for clean and straight cutting operations.

Furthermore, due to the lateral side surface being angled with the angle relative to the cutting plane, a simple and cost-effective solution is provided for improving cutting performance of a saw chain for a chainsaw. Accordingly, a chainsaw cutting link is provided overcoming, or at least alleviating, at least some of the above-mentioned problems and drawbacks. As a result, the above-mentioned object is achieved.

The lateral side surface comprises an upper edge and a lower edge, and wherein the lower edge is located closer to the base portion of the cutting link than the upper edge and is located further from a median plane of the base portion than the upper edge. Thereby, as realized by the inventors of the present disclosure, a chainsaw cutting link is provided having further improved conditions for enhanced cutting performance.

Obviously, the fact that the lower edge of the lateral side surface is located further from the median plane than the upper edge means that the upper edge of the lateral side surface is located closer to the median plane than the lower edge. As realized by the inventors of the present disclosure, this design of the top plate of the can significantly lower occurrences of stop feeding due to a reduced surface area of the top plate against the material to be cut which gives an increased pressure against the material to be cut. Moreover, as realized by the inventors of the present disclosure, this design of the top plate of the chainsaw cutting link provides positive effects on the problems with micro stops for the same reasons. In addition, as realized by the inventors of the present disclosure, this design of the top plate provides positive effects on the problems curved cuts. This is because the angled lateral side surface, which comprises the upper edge located closer to the median plane than the lower edge, can ensure that a saw chain comprising the chainsaw cutting link is guided more efficiently through a cutting kerf thereby providing conditions for clean and straight cutting operations.

Optionally, the angle is within the range of 1 - 60 degrees, or is within the range of 7 - 35 degrees. Thereby, as realized by the inventors of the present disclosure, a chainsaw cutting link is provided having improved conditions for enhanced cutting performance. This is because, as realized by the inventors of the present disclosure, a lateral side surface being angled with an angle within these ranges relative to the cutting plane can reduce occurrences of stop feeding. In addition, as realized by the inventors of the present disclosure, a lateral side surface being angled with an angle within these ranges relative to the cutting plane can have a positive impact on the problems of curved cuts and micro stops.

Optionally, the upper edge adjoins a top side surface of the top side. As realized by the inventors of the present disclosure, this design of the top plate provides positive effects on the problems curved cuts due to an enhanced guiding performance of the chainsaw cutting link through a cutting kerf of a material being cut. In addition, since the upper edge adjoins the top side surface of the top side, a chainsaw cutting link is provided having conditions for being manufactured in a simple and cost-effective manner.

Optionally, the lower edge adjoins a lower side surface of the lower side. Thereby, as realized by the inventors of the present disclosure, positive effects on the cutting performance of the chainsaw cutting link can be provided. In addition since the lower edge adjoins a lower side surface of the lower side, a chainsaw cutting link is provided having conditions for being manufactured in a simple and cost-effective manner.

Optionally, the distance from the median plane to a leading portion of the upper edge is within the range of 0.2 - 2.1 mm, or is within the range of 0.8 - 1.6 mm. Thereby, as realized by the inventors of the present disclosure, positive effects on the cutting performance of the chainsaw cutting link can be provided.

Optionally, the distance from the median plane to a leading portion of the lower edge is within the range of 0.5 - 3 mm, or is within the range of 1 - 2.1 mm. Thereby, as realized by the inventors of the present disclosure, positive effects on the cutting performance of the chainsaw cutting link can be provided.

Optionally, the ratio between the distance from the median plane to a leading portion of the upper edge and the distance from the median plane to a leading portion of the lower edge is within the range of 0.55 - 0.99, or is within the range of 0.68 - 0.88. Thereby, as realized by the inventors of the present disclosure, significant positive effects on the cutting performance of the chainsaw cutting link can be provided.

Optionally, the median plane of the base portion is parallel to the cutting plane. Thereby, a stable movement and cutting performance can be ensured of a saw chain comprising the cutting link.

Optionally, the lateral side surface is angled with an obtuse angle relative to a top side surface of the top side as measured in the plane perpendicular to the movement direction. Thereby, as realized by the inventors of the present disclosure, significant positive effects on the cutting performance of the chainsaw cutting link can be provided due to an increased pressure against the material to be cut as well as an improved guiding performance of the chainsaw cutting link through a cutting kerf of the material to be cut. Optionally, the lateral side surface is angled with an acute angle relative to a lower side surface of the lower side as measured in the plane perpendicular to the movement direction. Thereby, as realized by the inventors of the present disclosure, positive effects on the cutting performance of the chainsaw cutting link can be provided. In addition, a chainsaw cutting link is provided having conditions for being manufactured in a simple and cost-effective manner.

Optionally, the lateral side surface is flat. Thereby, as realized by the inventors of the present disclosure, significant positive effects on the cutting performance of the chainsaw cutting link can be provided due to prevention of occurrences of stop feeding, micro stops, and curved cuts. In addition, a chainsaw cutting link is provided having conditions for being manufactured in a simple and cost-effective manner.

Optionally, the lateral side surface is parallel to the movement direction. Thereby, as realized by the inventors of the present disclosure, a chainsaw cutting link is provided having conditions for further prevention of occurrences of curved cuts. This is because, the lateral side surface being parallel to the movement direction can provide an improved guidance performance of the chainsaw cutting link through a cutting kerf of a material being cut. Moreover, due to these features, a chainsaw cutting link is provided having conditions for being manufactured in a simple and cost-effective manner.

Optionally, the lateral side surface is angled with a clearance angle relative to the movement direction as measured in a plane perpendicular to the cutting plane. Thereby, a chainsaw cutting link is provided having conditions for further prevention of occurrences of stop feeding and micro stops. This is because, as realized by the inventors of the present disclosure, the clearance angle of the lateral side surface relative to the movement direction of the chainsaw cutting link provides improved conditions for avoiding an abutting contact between the lateral side surface and a material being cut.

Optionally, the clearance angle is within the range of 0.1 - 20 degrees, or is within the range of 0.5 - 8 degrees. Thereby, prevention of occurrences of stop feeding and micro stops can be ensured.

According to a second aspect of the present disclosure, the object is achieved by a saw chain for a chainsaw, wherein the saw chain comprises a number of chainsaw cutting links according to the first aspect of the present disclosure. Since the saw chain comprises a number of chainsaw cutting links according to the first aspect of the present disclosure, a saw chain is provided having conditions for an improved cutting performance. This is because, as realized by the inventors of the present disclosure, by providing the lateral side of the top plate with a lateral side surface being angled with an angle relative to the cutting plane, as measured in the plane perpendicular to the movement direction, occurrences of stop feeding, and micro stops, can be reduced.

As a further result, since the saw chain can reduce problems of micro stops, a saw chain is provided having conditions for improving the cutting efficiency of an electrically driven chainsaw in a simple and cost-effective manner.

Furthermore, due to the features of the cutting link of the saw chain, a simple and cost- effective solution is provided for improving cutting performance of a chainsaw.

Accordingly, a saw chain is provided overcoming, or at least alleviating, at least some of the above-mentioned problems and drawbacks. As a result, the above-mentioned object is achieved.

Optionally, the saw chain comprises a first sub-set of cutting links according to the first aspect of the present disclosure, and a second sub-set of cutting links with another geometry. The second subset may be e.g. every other, every third, every fifth, every 10^th, or every 20^th cutting link. Thereby, an asymmetry is created in the saw chain, which may further improve cutting efficiency of the saw chain, as the asymmetry induce vibrations in the chain during cutting.

Optionally, the cutting links in the second sub-set have top plates where the lower edge of the lateral side surface is located closer to a median plane of the base portion than the upper edge.

Optionally, the cutting links of the second sub-set have a maximal width that is 1.02 - 1.10, or 1.04 - 1.07 times the width of the cutting links of the first sub-set. Optionally, the cutting links of the second sub-set have a maximum height that is 1.005 - 1.05, or 1.005 - 1.02 times the height of the cutting links of the first sub-set. According to a third aspect of the present disclosure, the object is achieved by a chainsaw comprising a drive unit, a guide bar, and a saw chain according to the second aspect of the present disclosure, wherein the saw chain is movably arranged around the guide bar, and wherein the drive unit is configured to move the saw chain around the guide bar during operation of the chainsaw.

Since the chainsaw comprises a saw chain according to the second aspect of the present disclosure, a chainsaw is provided having conditions for an improved cutting performance. This is because, as realized by the inventors of the present disclosure, by providing the lateral side of the top plate with a lateral side surface being angled with an angle relative to the cutting plane, as measured in the plane perpendicular to the movement direction, occurrences of stop feeding, and micro stops, can be reduced.

Furthermore, due to the features of the cutting link of the saw chain of the chainsaw, a simple and cost-effective solution is provided for improving cutting performance of the chainsaw.

Accordingly, a chainsaw is provided overcoming, or at least alleviating, at least some of the above-mentioned problems and drawbacks. As a result, the above-mentioned object is achieved.

Optionally, the drive unit comprises an electric motor. Thereby, an electrically driven chainsaw is provided having conditions for reduced occurrences of micro stops.

Further features of, and advantages with, the present invention will become apparent when studying the appended claims and the following detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS Various aspects of the present disclosure, including its particular features and advantages, will be readily understood from the example embodiments discussed in the following detailed description and the accompanying drawings, in which:

Fig. 1 schematically illustrates a chainsaw according to some embodiments,

Fig. 2 illustrates a portion of a saw chain disposed on a guide bar, driven around a nose sprocket, of the chainsaw illustrated in Fig. 1,

Fig. 3 illustrates a first side view of a cutting link of the saw chain of illustrated in Fig. 1 and Fig. 2,

Fig. 4 illustrated a second side view of the cutting link explained with reference to Fig. 1 -

Fig. 3,

Fig. 5 illustrates a first perspective view of the cutting link explained with reference to Fig. 1 - Fig. 4,

Fig. 6 illustrates a second perspective view of the cutting link explained with reference to Fig.

1 - Fig. 5,

Fig. 7 illustrates a top view of the cutting link explained with reference to Fig. 1 - Fig. 6, Fig. 8 illustrates a rear view of the cutting link explained with reference to Fig. 1 - Fig. 7, Fig. 9 illustrates a front view of the cutting link explained with reference to Fig. 1 - Fig. 8, and Fig. 10 illustrates a top view of a cutting link according to some further embodiments.

DETAILED DESCRIPTION

Aspects of the present disclosure will now be described more fully. Like reference signs refer to like elements throughout. Well-known functions or constructions will not necessarily be described in detail for brevity and/or clarity.

Fig. 1 schematically illustrates a chainsaw 40 according to some embodiments. The chainsaw 40 comprises a drive unit 42, a guide bar 44, and a saw chain 30. The saw chain 30 is movably arranged around the guide bar 44. The drive unit 42 is configured to move the saw chain 30 around the guide bar 44 during operation of the chainsaw 40, as is further explained below.

According to the illustrated embodiments, the drive unit 42 comprises an electric motor (not illustrated) and a battery 43 configured to supply electricity to the electric motor during operation of the chainsaw 40. As an alternative, or in addition, the chainsaw 40 may comprise an electrical connection assembly for electrically connecting a power cord to the chainsaw 40 for supplying electricity to the electric motor during operation of the chainsaw 40. Thus, according to the illustrated embodiments, the chainsaw 40 is an electrically driven chainsaw comprising a power source in the form of an electric motor. However, according to further embodiments, the drive unit 42 of the chainsaw 40 may comprise an internal combustion engine, such as a small sized two-stroke internal combustion engine.

The chainsaw 40 further comprises a handle 45 configured to be gripped by a hand of a user of the chainsaw 40 during operation thereof. Moreover, the chainsaw 40 comprises a throttle actuator 46 and a safety switch 47 each arranged at the handle 45. According to the embodiments illustrated in Fig. 1, the throttle actuator 46 is arranged to be actuated, i.e., pressed, by fingers of the hand of the user gripping the handle 45. The safety switch 47 is configured to be actuated, i.e., pressed, by the palm of the hand of the user gripping the handle 45. The safety switch 47 is configured such that operation of the drive unit 42 is disabled when the safety switch 47 is not actuated.

According to the embodiments illustrated in Fig. 2, the chainsaw 40 is a so-called top handle chainsaw. However, according to further embodiments, the chainsaw 40 may be a rear handle chainsaw or any other type of handheld chainsaw such as a pole saw or a chainsaw pruner .

As mentioned, the drive unit 42 is configured to move the saw chain 30 around the guide bar 44 during operation of the chainsaw 40. The saw chain 30 a configured as an endless loop, guided along the guide bar 44, between a drive sprocket (not illustrated) and a nose sprocket 38. The drive unit 42 is configured to move the saw chain 30 around the guide bar 44 by rotating the drive sprocket.

In Fig. 1 , a movement direction md of the saw chain 30 is indicated. The movement direction md of the saw chain 30 is determined by the shape of the contour of the guide bar 44 as well as a degree of tension or the saw chain 30 between the nose sprocket 38 and the drive sprocket.

Fig. 2 illustrates a portion of the saw chain 30 disposed on the guide bar 44, driven around the nose sprocket 38, as seen in Fig. 1. For clarity of illustration, the assembly is illustrated with a side plate of the guide bar 44 broken away, to illustrate how the saw chain 30 is guided within the guide bar 44.

The saw chain 30 comprises a plurality of drive links 23, 23’, each of which includes a guide tooth 27 that rides in a guide bar groove 35 provided along the periphery of the guide bar 44 and engages the teeth of the nose sprocket 38. The leading end, with respect to a movement direction md of the saw chain 30, of each drive link 23 is pivotally connected to leading pair of tie links 17, a trailing end of which sandwich the leading end of the drive link 23 between them. A pivotal connection is formed by a rivet, which penetrates the tie links 17 and the drive link 23, and defines a pivot axis extending in a direction perpendicular to the movement direction md of the saw chain 30 during cutting.

Similarly, the trailing end of each drive link 23’ is pivotally connected, again via a rivet, to a trailing pair of tie links 17’, a leading end of which sandwich the trailing end of the drive link 23’ between them. The connections between drive links 23, 23’ and tie links 17, 17’ are repeated in an alternating fashion to complete an endless loop around the guide bar 44. For some pairs of tie links, one of the tie links is formed as a chainsaw cutting link 1. Moreover, each drive link immediately preceding a chainsaw cutting link 1 may be provided with a bumper 13. For reasons of brevity and clarity, a chainsaw cutting link 1 of the saw chain 30 is in some places herein simply referred to as a cutting link 1. The movement direction md of the saw chain 30 may also be referred to as a direction of travel of the saw chain 30 or a cutting direction.

As understood from the above described, the saw chain 30 of the chainsaw 40 comprises a number of cutting links 1. In Fig. 1 and Fig. 2, a cutting plane Pc is indicated. Each cutting link 1 of the saw chain 30 is configured to move in the cutting plane Pc upon movement thereof around the guide bar 44. The cutting plane Pc is an imaginary plane within which the cutting action occurs, determined by the paths of the cutting links 1 of the saw chain 40 upon movement in the movement direction md around the guide bar 44.

Fig. 3 illustrates a first side view of a cutting link 1 of the saw chain 30 of illustrated in Fig. 1 and Fig. 2. In Fig. 3, the movement direction md of the cutting link 1 is indicated as well as the cutting plane Pc. As understood from the above described, the cutting plane Pc is parallel to the movement direction md. The fact that Fig. 3 illustrates a side view of the cutting link 1 means that the cutting link 1 is illustrated as seen in a direction perpendicular to the movement direction md of the cutting link 1 and perpendicular to the cutting plane Pc. As explained above, the cutting link 1 is configured to move along the movement direction md in the cutting plane Pc during cutting.

As indicated in Fig. 3, the cutting link 1 comprises a base portion 2 provided with two rivets holes 20, 20’. The two rivet holes 20, 20’ are also indicated in Fig. 2. Below, simultaneous reference is made to Fig. 1 - Fig. 3, if not indicated otherwise. The two rivet holes 20, 20’ are configured to pivotally inter-connect the cutting link 1 with adjacent links 23, 23’. Each of the two rivet holes 20, 20’ defines a respective pivot axis C1, C2 for the pivotal inter-connection with adjacent links 23, 23’. As understood from the above described, each pivot axis C1 , C2 is perpendicular to the movement direction md and to the cutting plane Pc.

Fig. 4 illustrated a second side view of the cutting link 1 explained with reference to Fig. 1 - Fig. 3. In the second side view of the cutting link 1 of Fig. 4, the cutting link 1 is illustrated as seen from an opposite side as compared to in Fig. 3. Also in Fig. 4, the movement direction md of the cutting link 1 is indicated as well as the cutting plane Pc.

Fig. 5 illustrates a first perspective view of the cutting link 1 explained with reference to Fig. 1 - Fig. 4. The movement direction md of the cutting link 1 is also indicated in Fig. 5. Below, simultaneous reference is made to Fig. 1 - Fig. 5, if not indicated otherwise.

The cutting link 1 comprises a side plate 5 and a top plate 4. The side plate 5 is connected to the base portion 2 and the top plate 4 is connected to the side plate 5. In other words, the top plate 4 is connected to the base portion 2 via the side plate 5. The side plate 5 and the top plate 4 defines an angle to form an L-shaped cutting tooth 3 extending away from the base portion 2. In other words, the side plate 5 and the top plate 4 meet at an angle defining an L- shape of the cutting tooth 3.

The top plate 4 extends along the direction of the pivot axes C1, C2 defined by the rivet holes 20, 20’, while the side plate 43 extends along a plane which is substantially perpendicular to the pivoting axes C1, C2. According to the illustrated embodiments, the cutting link 1 is integrally formed of steel sheet having a thickness. Typical values of the thickness may be, for example, between 0.5 mm and 2 mm.

The top plate 4 comprises a top side 6’ facing in a direction d1 away from the base portion 2 and a lower side 7’ facing in a direction d2 towards the base portion 2. The reference signs for the top side 6’ and the lower side 7’ have not been provided in Fig. 3 and Fig. 5 for reasons of brevity and clarity but are provided in Fig. 4. The feature that the top side 6’ faces in a direction d1 away from the base portion 2 may also be expressed as that the top side 6’ faces in a direction d1 away from a plane P3 which comprises each of the pivot axes C1, C2 defined by the rivet holes 20, 20 of the cutting link 1. Likewise, the feature that the lower side 7’ faces in a direction d2 towards the base portion 2 may also be expressed as that the lower side 7’ faces in a direction d2 towards a plane P3 which comprises each of the pivot axes C1, C2 defined by the rivet holes 20, 20 of the cutting link 1. Such a plane P3, i.e., a plane P3 comprising each of the pivot axes C1 , C2 defined by the rivet holes 20, 20 of the cutting link 1 , is indicated in Fig. 4.

The top side 6’ comprises a top side surface 6 which also faces in a direction d1 away from the base portion 2, i.e., in a direction away from the plane P3 comprising each of the pivot axes C1 , C2 defined by the rivet holes 20, 20 of the cutting link 1. Likewise, the lower side 7’ comprises a lower side surface 7 which also faces in a direction d2 towards the base portion 2, i.e., in a direction towards the plane P3 comprising each of the pivot axes C1 , C2 defined by the rivet holes 20, 20 of the cutting link 1.

Moreover, the top plate 4 comprises a front side 8’ facing in the movement direction md and a rear side 10’ facing in a direction opposite to the movement direction md. The reference signs for the front side 8’ and the rear side 10’ have not been provided in Fig. 3 and Fig. 5 for reasons of brevity and clarity but are provided in Fig. 4. The front side 8’ comprises a front side surface 8 which also faces in the movement direction md, and the rear side 10’ comprises a rear side surface 10 which also faces in the direction opposite to the movement direction md.

The top plate 4 further comprises a lateral side 9’ connecting the top side 6’ and the lower side 7’. The lateral side 9’ is indicated in Fig. 4 and Fig. 5. Moreover, according to the illustrated embodiments, the lateral side 9’ connects the front side 8’ and the rear side 10’ of the top plate 4.

Fig. 6 illustrates a second perspective view of the cutting link 1 explained with reference to Fig. 1 - Fig. 5. The movement direction md of the cutting link 1 is also indicated in Fig. 6. Below, simultaneous reference is made to Fig. 1 - Fig. 6, if not indicated otherwise.

As indicated in Fig. 3, Fig. 4, and Fig. 6, each of the side plate 5 and the top plate 4 comprises a sharp cutting edge 21 , 2T facing in the movement direction md. According to the illustrated embodiments, the cutting edge 21 of the top plate 4 is provided between the top side surface 6 and the front side surface 8.

Moreover, as indicated in Fig. 3 - Fig. 6, the cutting link 1 comprises a depth gauge 24 disposed at a leading end 2’ of the base portion 2 with respect to the movement direction md. The leading end 2’ of the base portion 2 is only indicated in Fig. 4 for reasons of brevity and clarity. As is also seen in Fig. 4, the side plate 5, and thus also the cutting tooth 3, is disposed a trailing end 2” of the base portion 2 with respect to the movement direction md. Like above, the trailing end 2” of the base portion 2 is only indicated in Fig. 4 for reasons of brevity and clarity The depth gauge 24 serves as a guide to ensure that the cutting tooth 3 cuts material at a determined depth.

Fig. 7 illustrates a top view of the cutting link 1 explained with reference to Fig. 1 - Fig. 6. In Fig. 7, the cutting link 1 is illustrated as seen in a direction towards the top side 6’ of the top plate 4 in a direction coinciding with the cutting plane Pc. The movement direction md of the cutting link 1 has been indicated in Fig. 7. The viewing direction of Fig. 7 is perpendicular to the movement direction md. Below, simultaneous reference is made to Fig. 1 - Fig. 7, if not indicated otherwise.

In Fig. 7, a sharpening marker 51 of the cutting link 1 is indicated. The sharpening marker 51 is provided as a groove extending across the top side surface 6 of the top plate 4. The sharpening marker 51 indicates a maximum distance to which the cutting edge 21 of the top plate 4 is recommended to be sharpened using a grinding tool.

Moreover, in Fig. 7, a median plane Pm of the base portion 2 is indicated. The median plane Pm of the base portion 2 is imaginary plane that divides the base portion 2 of the cutting link 1 into two equally sized halves. According to the illustrated embodiments, the median plane Pm of the base portion 2 is parallel to the cutting plane Pc.

Furthermore, in Fig. 7, a plane P1 is indicated which is perpendicular to the movement direction md. Since the movement direction md is parallel to each of the cutting plane Pc and the median plane Pm according to the illustrated embodiments, the plane P1 is perpendicular to each of the movement direction md and the cutting plane Pc. The plane P1 is also indicated in Fig. 4. According to the illustrated embodiments, the plane P1 is also perpendicular to the plane P3 which comprises each of the pivot axes C1 , C2 defined by the rivet holes 20, 20 of the cutting link 1.

Fig. 8 illustrates a rear view of the cutting link 1 explained with reference to Fig. 1 - Fig. 7. In Fig. 8, the cutting link 1 is illustrated as seen in a direction towards the rear side 10’ of the top plate 4 in a direction parallel to the cutting plane Pc. The movement direction md of the cutting link 1 has not been indicated in Fig. 8 for reasons of brevity and clarity.

The plane P1 is also indicated in Fig. 8. However, in Fig. 8, the cutting link 1 is not illustrated as seen in a direction perpendicular to the plane P1. Instead, in Fig. 8, the cutting link 1 is illustrated as seen along a first extension direction ed1 of the top plate 4 indicated in Fig. 4. The first extension direction ed1 of the top plate 4 is parallel to the cutting plane Pc but deviates slightly from the movement direction md of the cutting link 1 due to a clearance angle a5 of the top plate 4 as measured in a plane parallel to the cutting plane Pc. The clearance angle a5 is indicated in Fig. 4. Moreover, in Fig. 4, a second extension direction ed2 of the top plate 4 is indicated. The second extension direction ed2 is opposite to the first extension direction ed1.

Fig. 9 illustrates a front view of the cutting link 1 explained with reference to Fig. 1 - Fig. 8. In Fig. 9, the cutting link 1 is illustrated as seen in a direction towards the front side 8’ of the top plate 4 in a direction parallel to the cutting plane Pc. The movement direction md of the cutting link 1 has not been indicated in Fig. 9 for reasons of brevity and clarity. Below, simultaneous reference is made to Fig. 1 - Fig. 9, if not indicated otherwise.

In Fig. 9, the cutting link 1 is illustrated as seen along the second extension direction ed2 of the top plate 4 indicated in Fig. 4. As mentioned, the second extension direction ed2 is opposite to the first extension direction ed1 and is thus also angled relative to the movement direction md of the cutting link 1, see Fig. 4. In other words, also in Fig. 9, the cutting link 1 is not illustrated as seen in a direction perpendicular to the plane P1 indicated in Fig. 9.

As is indicated in Fig. 8 and Fig. 9, according to embodiments herein, the lateral side 9’ comprises a lateral side surface 9, wherein the lateral side surface 9 is angled with an angle a1 relative to the cutting plane Pc as measured in the plane P1 which is perpendicular to the movement direction md of the cutting link 1.

As realized by the inventors of the present disclosure, by providing the lateral side 9’ of the top plate 4 with a lateral side surface 9 being angled with an angle a1 relative to the cutting plane Pc as measured in the plane P1 perpendicular to the movement direction md, occurrences of stop feeding can be reduced. Stop feeding refers to occurrences in which a saw chain 30 is moved against a material to be cut but without effectively removing chips therefrom. Stop feeding occurrences normally increase the operation speed of the drive unit 42, and thereby also the movement speed of the saw chain 30 around the guide bar 44. Moreover, normally, excessive heat is generated between the saw chain 30 and the material to be cut due to friction therebetween during stop feeding occurrences.

In addition, as realized by the inventors of the present disclosure, by providing the lateral side 9’ of the top plate 4 with a lateral side surface 9 being angled with the angle a1 relative to the cutting plane Pc, problems of curved cuts and micro stops can be reduced. Curved cuts refer to a phenomenon where the chainsaw 40 produces a cut that deviates from a straight line, resulting in an arc or curve rather than a linear cut through the material. This issue often arises due to wear and increased width in the guide bar groove 35 or changes in the dimensions of the cutting link 1 , particularly after repeated sharpening, which can alter the width of the cutting link 1. This can lead to uneven cutting forces being applied across the saw chain 30. This imbalance causes the saw chain 30 to drift off a straight path, creating a curved cut. Such cuts are not only inefficient but can also compromise the safety and precision of chainsaw operations.

Micro stops refer to a phenomenon when cutting momentarily halts, which presents a challenge especially for electric chainsaws, which seem more susceptible than chainsaws powered by a combustion engine. This is believed to stem from differences in torque characteristics, although the way operators manage feeding force also plays a significant role. Frequent micro stops, especially during self-feeding cuts, can greatly affect the ability of the saw chain 30 to cut effectively.

As is seen in Fig. 5 - Fig. 9, according to the illustrated embodiments, the lateral side surface 9 comprises an upper edge 11 and a lower edge 12, and wherein the lower edge 12 is located closer to the base portion 2 of the cutting link 1 than the upper edge 11 and is located further from the median plane Pm of the base portion 2 than the upper edge 11. In other words, in these embodiments, the upper edge 11 of the lateral side surface 9 is located closer to the median plane Pm of the base portion 2 than the lower edge 12 of the lateral side surface 9.

According to the embodiments illustrated in Fig. 3 - Fig. 9, the angle a1 is 30 degrees. However, according to further embodiments, the angle a1 may be within the range of 1 - 60 degrees, within the range of 7 - 35 degrees, or within the range of 10 - 30 degrees.

When measuring the angle a1 in the respective paper plane of Fig. 8 and Fig. 9, it is can be measured to approximately 28 degrees. In Fig. 8, this is due to the fact that the cutting link 1 is illustrated as seen along the first extension direction ed1 of the top plate 4, which first extension direction ed1 deviates slightly from the movement direction md of the cutting link 1 , see Fig. 4. Likewise, In Fig. 9, this is due to the fact that the cutting link 1 is illustrated as seen along the second extension direction ed2 of the top plate 4, which second extension direction ed2 is angled relative to the movement direction md of the cutting link 1 , see Fig. 4. In other words, the plane P1 indicated in Fig. 8 is not perfectly parallel to the paper plane of Fig. 8 and the plane P1 indicated in Fig. 9 is not perfectly parallel to the paper plane of Fig. 9. In more detail, each of the planes P1 indicated in Fig. 8 and Fig. 9 is angled relative to the respective paper plane with an angle having the size of the clearance angle a5 indicated in Fig. 4.

According to the illustrated embodiments, the clearance angle a5 is approximately 7 degrees. According to further embodiments, the clearance angle a5 may be within the range of 1 - 14 degrees, or 5 - 9 degrees.

According to the embodiments illustrated in Fig. 3 - Fig. 9, the upper edge 11 of the lateral side surface 9 adjoins the top side surface 6 of the top side 6’. Moreover, in these embodiments, the lateral side surface 9 is angled with an obtuse angle a2 relative to the top side surface 6 of the top side 6’ as measured in the plane P1 perpendicular to the movement direction md. The obtuse angle a2 is indicated in Fig. 9. According to the embodiments illustrated in Fig. 3 - Fig. 9, the size of the obtuse angle a2 is 120 degrees. According to further embodiments, the size of the obtuse angle a2 may be within the range of 92 - 178 degrees, within the range 100 - 160 degrees, or within the range 110 - 140 degrees.

Likewise, in these embodiments, the lower edge 12 of the lateral side surface 9 adjoins the lower side surface 7 of the lower side 7’ of the top plate 4. Moreover, in these embodiments, the lateral side surface 9 is angled with an acute angle a3 relative to the lower side surface 7 of the lower side 7’ as measured in the plane P1 perpendicular to the movement direction md. The acute angle a3 is indicated in Fig. 9. According to the embodiments illustrated in Fig. 3 - Fig. 9, the size of the acute angle a3 is 62 degrees. According to further embodiments, the size of the acute angle a3 may be within the range of 15 - 89 degrees, within the range of 35 - 80 degrees, or within the range of 52 - 72 degrees.

According to the embodiments illustrated in Fig. 3 - Fig. 9, the lateral side surface 9 of the top plate 4 is flat, i.e., planar. The feature that the lateral side surface 9 of the top plate 4 is flat means that the lateral side surface 9 of the top plate 4 is smooth and has a flat, even geometry without any curvature, and that it extends in a single flat plane. However, according to further embodiments, the lateral side surface 9 may have a shape differing from a flat/planar shape.

Moreover, according to the embodiments illustrated in Fig. 3 - Fig. 9, the lateral side surface 9 of the top plate 4 constitutes the entire lateral side 9’ of the top plate 4. This may also be expressed as that the lateral side surface 9 covers the entire lateral side 9’ of the top plate 4. However, according to further embodiments, the lateral side surface 9 may cover only a portion of the lateral side 9’ of the top plate 4. The remaining part of the lateral side 9’ of the top plate 4 may comprise a surface being parallel to the cutting plane Pc. According to such embodiments, the angled lateral side surface 9, as referred to herein, may be arranged at an upper part of the lateral side 9’ and the surface being parallel to the cutting plane Pc may be arranged at a lower part of the lateral side 9’, wherein the lower part is arranged closer to the base portion 2 of the cutting link 1 than the upper part. Also in such embodiments, the upper edge 11 of the lateral side surface 9 may adjoin the top side surface 6 of the top side 6’.

However, as understood from the above described, in such embodiments, the lower edge 12 of the lateral side surface 9 may adjoin the surface being parallel to the cutting plane Pc.

In Fig. 7, a total width w of the top plate 4 is indicated. According to the illustrated embodiments, the total width w of the top plate 4 is 3.54 millimetres. The term millimetres is in some places herein abbreviated “mm”. The total width w of the top plate 4 can be measured in a direction perpendicular to the movement direction md of the cutting link 1 , i.e., in a direction perpendicular to the median plane Pm of the base portion 2 of the cutting link 1 according to the illustrated embodiments. According to further embodiments, the total width w of the top plate 4 may be within the range of 1.5 - 8 mm, or may be within the range of 2.5 - 6 mm.

Moreover, in Fig. 7, a distance di 1 from the median plane Pm to a leading portion 1 T with respect to the movement direction md of the upper edge 11 of the lateral side surface 9 is indicated. According to the illustrated embodiments, the distance di 1 from the median plane Pm to the leading portion 1 T of the upper edge 11 is 1.18 mm. According to further embodiments, the distance di1 from the median plane Pm to the leading portion 1 T of the upper edge 11 may be within the range of 0.2 - 2.1 mm, or may be within the range of 0.8 - 1.6 mm.

Furthermore, in Fig. 7, a distance di2 from the median plane Pm to a leading portion 12’ with respect to the movement direction md of the lower edge 12 is indicated. According to the illustrated embodiments, the distance di2 from the median plane Pm to the leading portion 12’ of the lower edge 12 is 1.55 millimetres. According to further embodiments, the distance di2 from the median plane Pm to the leading portion 12’ of the lower edge 12 may be within the range of 0.5 - 3 mm, or may be within the range of 1 - 2.1 mm.

As understood from the above described, according to the illustrated embodiments, the ratio between the distance di1 from the median plane Pm to the leading portion 1 T of the upper edge 11 and the distance di2 from the median plane Pm to the leading portion 12’ of the lower edge 12 is approximately 0.76. However, according to some embodiments, the ratio between the distance di1 from the median plane Pm to the leading portion 1 T of the upper edge 11 and the distance di2 from the median plane Pm to the leading portion 12’ of the lower edge 12 may be within the range of 0.55 - 0.99 or may be within the range of 0.66 - 0.86.

Moreover, as understood from the above described, according to the illustrated embodiments, the ratio between the distance di 1 from the median plane Pm to the leading portion 11’ of the upper edge 11 and the total width w of the top plate 4 of the cutting link 1 is approximately 0.33. However, according to further embodiments, the ratio between the distance di 1 from the median plane Pm to the leading portion 11’ of the upper edge 11 and the total width w of the top plate 4 of the cutting link 1 may be within the range of 0.1 - 0.6 or may be within the range of 0.15 - 0.5.

Furthermore, as understood from the above described, according to the illustrated embodiments, the ratio between the distance di2 from the median plane Pm to the leading portion 12’ of the lower edge 12 and the total width w of the top plate 4 of the cutting link 1 is approximately 0.44. However, according to further embodiments, the ratio between the distance di2 from the median plane Pm to the leading portion 12’ of the lower edge 12 and the total width w of the top plate 4 of the cutting link 1 may be within the range of 0.16 - 0.75 or may be within the range of 0.24 - 0.64.

As is best seen in Fig. 7, according to the embodiments illustrated in Fig. 3 - Fig. 9, the lateral side surface 9 is parallel to the movement direction md. In Fig. 7, a plane P2 being perpendicular to the cutting plane Pc is indicated. The plane P2 indicated in Fig. 7 is parallel to the plane P3 illustrated in Fig. 4. The fact that the lateral side surface 9 is parallel to the movement direction md means that the lateral side surface 9 is not angled with a clearance angle relative to the movement direction md as measured in the plane P2 perpendicular to the cutting plane Pc according to the embodiments illustrated in Fig. 3 - Fig. 9.

Moreover, according to the embodiments illustrated in Fig. 3 - Fig. 9, the distance di 1 from the median plane Pm to the leading portion 1 T of the upper edge 11 is the same as the distance from the median plane Pm to a trailing portion 11” of the upper edge 11. Likewise, according to the embodiments illustrated in Fig. 3 - Fig. 9, the distance di2 from the median plane Pm to the leading portion 12’ of the lower edge 12 is the same as the distance from the median plane Pm to a trailing portion 12” of the lower edge 12. The distance from the median plane Pm to the trailing portion 11” of the upper edge 11 and the distance from the median plane Pm to the trailing portion 12” of the lower edge 12 have not been indicated in Fig. 7 for reasons of brevity and clarity.

Fig. 10 illustrates a top view of a cutting link T according to some further embodiments. In Fig. 10, the cutting link T is illustrated as seen in the same viewing direction as the cutting link 1 according to the embodiments illustrated in Fig. 7.

The cutting link T illustrated in Fig. 10 comprises the same features, functions, and advantages as the cutting link 1 explained with reference to Fig. 3 - Fig. 9 above, with some differences. Only the differences are explained in detail below for reasons of brevity and clarity. As indicated in Fig. 1 and Fig. 2, the saw chain 30 of the chainsaw 40 may comprise a number of cutting links T according to the embodiments illustrated in Fig. 10.

According to the embodiments illustrated in Fig. 10, the lateral side surface 9 of the cutting link T is angled with a clearance angle a4 relative to the movement direction md as measured in the plane P2 perpendicular to the cutting plane Pc. According to the embodiments illustrated in Fig. 10, the clearance angle a4 is approximately 4 degrees. However, according to further embodiments, the clearance angle a4 may be within the range of 0.1 - 20 degrees or may be within the range of 0.5 - 8 degrees.

As seen in Fig. 10, the fact that the lateral side surface 9 of the cutting link T is angled with the clearance angle a4 relative to the movement direction md as measured in the plane P2 perpendicular to the cutting plane Pc means that the distance from the median plane Pm to a trailing portion 11” of the upper edge 11 is smaller than the distance di1 from the median plane Pm to the leading portion 1 T of the upper edge 11. The distance from the median plane Pm to the trailing portion 11” of the upper edge 11 has not been indicated in Fig. 10 for reasons of brevity and clarity. Likewise, the fact that the lateral side surface 9 of the cutting link T is angled with the clearance angle a4 relative to the movement direction md as measured in the plane P2 perpendicular to the cutting plane Pc means that the distance di2’ from the median plane Pm to a trailing portion 12” of the lower edge 12 is smaller than the distance di2 from the median plane Pm to the leading portion 12’ of the lower edge 12.

According to the embodiments illustrated in Fig. 10, the distance di1 from the median plane Pm to the leading portion 1 T of the upper edge 11 is the same as the distance di 1 from the median plane Pm to the leading portion 1 T of the upper edge 11 of the cutting link 1 explained with reference to Fig. 3 - Fig. 9, i.e., 1.18 mm. However, also in these embodiments, the distance di1 from the median plane Pm to the leading portion 1 T of the upper edge 11 may be within the range of 0.2 - 2.1 mm, or may be within the range of 0.8 - 1.6 mm.

Moreover, according to the embodiments illustrated in Fig. 10, the distance di2 from the median plane Pm to the leading portion 12’ of the lower edge 12 is the same as the distance di2 from the median plane Pm to the leading portion 12’ of the lower edge 12 of the cutting link 1 explained with reference to Fig. 3 - Fig. 9, i.e. , 1.55 mm. However, also in these embodiments, the distance di2 from the median plane Pm to the leading portion 12’ of the lower edge 12 may be within the range of 0.5 - 3 mm, or may be within the range of 1 - 2.1 mm.

Moreover, according to the embodiments illustrated in Fig. 10, the ratio between the distance from the median plane Pm to a trailing portion 11” of the upper edge 11 and the distance di1 from the median plane Pm to the leading portion 1 T of the upper edge 11 is approximately 0.72. According to further embodiments, the ratio between the distance from the median plane Pm to the trailing portion 11” of the upper edge 11 and the distance di1 from the median plane Pm to the leading portion 11’ of the upper edge 11 may be within the range of 0.4 - 0.99 or may be within the range of 0.52 - 0.92.

Below, simultaneous reference is made to Fig. 1 - Fig. 10, if not indicated otherwise. The cutting link 1, T according to the present disclosure may be manufactured by a punching process of a metal sheet material. The L-shape of the cutting tooth 3 may be obtained by bending process of a punched piece of the metal sheet material. The bending process may be a cold forging process. The angled lateral side surface 9 of the lateral side 9’ of the top plate 4 may be provided in the punching process of the metal sheet material. As an alternative, or in addition, the lateral side surface 9 may be provided with the herein described angle a1 relative to the cutting plane Pc by a grinding process of the lateral side 9’ of the top plate 4 performed after the punching process of the metal sheet material. The grinding process may be performed before or after the above described bending process.

The plane P1 as referred to herein may also be referred to as a first plane P1, the plane P2 as referred to herein may also be referred to as a second plane P2, and the plane P3 as referred to herein may also be referred to as a third plane P3.

It is to be understood that the foregoing is illustrative of various example embodiments and that the invention is defined only by the appended independent claims. A person skilled in the art will realize that the example embodiments may be modified, and that different features of the example embodiments may be combined to create embodiments other than those described herein, without departing from the scope of the present invention, as defined by the appended independent claims.

As used herein, the term "comprising" or "comprises" is open-ended, and includes one or more stated features, elements, steps, components, or functions but does not preclude the presence or addition of one or more other features, elements, steps, components, functions, or groups thereof.

Claims

1. A chainsaw cutting link (1 , 1’) configured to move along a movement direction (md) in a cutting plane (Pc) during cutting, wherein the cutting link (1, T) comprises: a base portion (2) provided with two rivets holes (20, 20’) for pivotal inter-connection with adjacent links (23, 23’), each of said rivet hole (20, 20’) defining a respective pivot axis (C1 , C2), and a side plate (5) and a top plate (4) defining an angle to form an L-shaped cutting tooth (3) extending away from the base portion (2), wherein the top plate (4) comprises: a top side (6’) facing in a direction (d1) away from the base portion (2), a lower side (7’) facing in a direction (d2) towards the base portion (2), and a lateral side (9’) connecting the top side (6’) and the lower side (7’), wherein the lateral side (9’) comprises a lateral side surface (9) being angled with an angle (a1) relative to the cutting plane (Pc) as measured in a plane (P1) perpendicular to the movement direction (md). wherein the lateral side surface (9) comprises an upper edge (11) and a lower edge (12), and wherein the lower edge (12) is located closer to the base portion (2) of the cutting link (1, 1’) than the upper edge (11) and is located further from a median plane (Pm) of the base portion (2) than the upper edge (11).

2. The chainsaw cutting link (1, T) according to claim 1, wherein the angle (a1) is within the range of 1 - 60 degrees, or is within the range of 7 - 35 degrees.

3. The chainsaw cutting link (1, T) according to claim 1 or 2, wherein the upper edge (11) adjoins a top side surface (6) of the top side (6’).

4. The chainsaw cutting link (1, T) according to any one of the claims 1 - 3, wherein the lower edge (12) adjoins a lower side surface (7) of the lower side (7’).

5. The chainsaw cutting link (1, T) according to any one of the claims 1 - 4, wherein the distance (di1) from the median plane (Pm) to a leading portion (11’) of the upper edge

(11) is within the range of 0.2 - 2.1 mm, or is within the range of 0.8 - 1.6 mm.

6. The chainsaw cutting link (1, T) according to any one of the claims 1 - 5, wherein the distance (di2) from the median plane (Pm) to a leading portion (12’) of the lower edge

(12) is within the range of 0.5 - 3 mm, or is within the range of 1 - 2.1 mm.

7. The chainsaw cutting link (1, T) according to any one of the claims 1 - 6, wherein the ratio between the distance (di 1 ) from the median plane (Pm) to a leading portion (1 T) of the upper edge (11) and the distance (di2) from the median plane (Pm) to a leading portion (12’) of the lower edge (12) is within the range of 0.55 - 0.99, or is within the range of 0.68 - 0.88.

8. The chainsaw cutting link (1, T) according to any one of the claims 1 - 7, wherein the median plane (Pm) of the base portion (2) is parallel to the cutting plane (Pc).

9. The chainsaw cutting link (1, T) according to any one of the preceding claims, wherein the lateral side surface (9) is angled with an obtuse angle (a2) relative to a top side surface (6) of the top side (6’) as measured in the plane (P1) perpendicular to the movement direction (md).

10. The chainsaw cutting link (1, T) according to any one of the preceding claims, wherein the lateral side surface (9) is angled with an acute angle (a3) relative to a lower side surface (7) of the lower side (7’) as measured in the plane (P1) perpendicular to the movement direction (md).

11. The chainsaw cutting link (1, T) according to any one of the preceding claims, wherein the lateral side surface (9) is flat.

12. The chainsaw cutting link (1) according to any one of the preceding claims, wherein the lateral side surface (9) is parallel to the movement direction (md).

13. The chainsaw cutting link (T) according to any one of the claims 1 - 11, wherein the lateral side surface (9) is angled with a clearance angle (a4) relative to the movement direction (md) as measured in a plane (P2) perpendicular to the cutting plane (Pc).

14. The chainsaw cutting link (T) according to claim 13, wherein the clearance angle (a4) is within the range of 0.1 - 20 degrees, or is within the range of 0.5 - 8 degrees.

15. A saw chain (30) for a chainsaw (40), wherein the saw chain (30) comprises a number of chainsaw cutting links (1, T) according to any one of the preceding claims.

16. A chainsaw (40) comprising a drive unit (42), a guide bar (44), and a saw chain (30) according to claim 16, wherein the saw chain (30) is movably arranged around the guide bar (44), and wherein the drive unit (42) is configured to move the saw chain (30) around the guide bar (44) during operation of the chainsaw (40).

17. The chainsaw (40) according to claim 16, wherein the drive unit (42) comprises an electric motor.