CN1912223B - The Differential Feeding Mechanism of Front and Back Moving Teeth of Horizontal Cylinder Sewing Machine - Google Patents

Abstract

The invention discloses a front-back moving tooth differential feeding mechanism of a transverse cylinder type sewing machine, which is used for adjusting the feeding speed of front and back moving teeth for feeding cloth.

Description

The Differential Feeding Mechanism of Front and Back Moving Teeth of Horizontal Cylinder Sewing Machine

technical field

The invention relates to a horizontal cylinder sewing machine, in particular to a horizontal cylinder sewing machine which can adjust the feed stroke distances of front and rear moving teeth respectively.

Background technique

Nowadays, with the maturity of the textile industry technology and the development of material technology, a variety of fabrics with different material properties from traditional fabrics have appeared. In addition, with the improvement of the economic level, people pay more and more attention to the appearance and suitability of clothing. Fashion designers have diverse and complex designs, and sewing methods must therefore be improved.

In the early sewing machines with a single feed tooth, the function of the feed tooth was only to bring the fabric into the sewing position for sewing. If you want to change the distance between the sewing threads (commonly known as thick and thin needles), since the motor speed of the sewing machine remains unchanged, Therefore, if the number of times the knitting needle is lowered does not change, it only needs to change the stroke distance of the transfer tooth, and the amount of cloth fed by the transfer tooth can be increased or decreased to achieve the purpose of thick and thin needles. However, in the face of today's new types of cloth (such as cloth with high elasticity) and different designs of clothing (such as naturally forming wrinkles after sewing), the above-mentioned sewing machine with a single transfer tooth is obviously not enough to cope. Therefore, at present, most of the sewing machines with front and rear feeding teeth are used to deal with it. Among them, the function of the rear feeding tooth is equivalent to the function of the above-mentioned single feeding tooth. If the moving stroke can be changed, the thickness of the sewing cloth can be controlled. , while the function of the forward feeding gear needs to be adjusted according to the moving stroke of the rear feeding gear, so that the rear end of the fabric enters the sewing position slowly, because the amount of cloth brought in by the forward feeding gear is the same as that of the rear moving gear Or more or less (commonly known as the differential ratio), it will produce different situations such as flat seam surface, cloth pressing or wrinkling, so as to deal with today's highly elastic fabrics and various complex designs.

However, looking at the horizontal cylinder sewing machines currently on the market, there is no sewing machine that can separately control and adjust the travel strokes of the front and rear two transfer teeth (that is, the ratio of thickness to needle and differential), such as the Taiwan patent that the inventor applied for before. Announcement No. 541377 "sewing machine with front differential feed adjustment control mechanism", the technical content of this invention is mainly to use a front differential feed adjustment control mechanism to adjust the speed of the front moving teeth, including: a The swinging part, the first, second, third and fourth moving parts, an adjustment mechanism, and a transmission shaft, the front differential feed adjustment control mechanism is moved by the rear differential feed transmission mechanism of the sewing machine, which can drive the front The moving teeth do reciprocating motion, and the above-mentioned front differential feed adjustment control mechanism is provided with an adjustment mechanism that changes the translational reciprocating feed distance of the front moving teeth, and the front differential feed adjustment control mechanism is operated. By adjusting the mechanism, the action distance of the front moving teeth can be adjusted. Although this invention can adjust the moving distance of the front moving teeth, it does not have the ability to adjust the translational reciprocating distance of the rear moving teeth. Instead, it is affected by the change of the front moving teeth and changes its moving distance, so it is impossible to adjust the front and rear moving teeth separately. It is relatively impossible to achieve the purpose of adjusting the sewing thickness needle and differential ratio separately as expected by the operator. When it needs to be used for special fabrics, special sewing density designs, or the aesthetic effect of wrinkling fabrics When there is a need, it is an urgent problem for sewing machine manufacturers to have a sewing machine in which the operator can adjust the thickness of the sewing needle and the differential ratio at will.

Contents of the invention

The main purpose of the present invention is to solve the above-mentioned defects in the prior art. In order to avoid the existence of the defects, the present invention provides a differential feed mechanism for front and rear shifting teeth of a horizontal cylinder sewing machine.

According to the present invention, the front and rear shift gear differential feed mechanism of the horizontal cylinder sewing machine comprises a main shaft connected to the power source of the sewing machine; The center is coaxially pivoted on the main shaft, and is driven by the main shaft to form an up and down swing stroke. One of the two rocking shafts is the front rocking shaft corresponding to the front moving teeth, and the other is the front rocking shaft corresponding to the front moving teeth. The rear moving tooth is a rear rocking shaft; a swing unit, pivotally connected to the front or rear rocking shaft, includes two front swing arms and a rear swing arm corresponding to control the feed stroke of the front and rear moving teeth; two The adjustment unit includes two counterweights pivotally connected to the front and rear swing arms and two pullers fixed on the counterweights, which are used to adjust the position of the front moving teeth or the rear moving teeth respectively. Translation reciprocating feed stroke.

According to the differential feeding mechanism of the front and rear moving teeth of the horizontal cylinder sewing machine of the present invention, the operator can control each adjustment unit separately to control the left and right moving strokes of the front and rear moving teeth that are linked to them, and the cloth with different material characteristics , The sewing design adjusts the travel distance of the front and rear moving teeth corresponding to the best feeding cloth, so as to achieve the purpose of adjusting the thickness of the sewing needle and the differential ratio respectively.

Description of drawings

Fig. 1 is a schematic perspective view of the appearance of the present invention.

Fig. 2-1 and Fig. 2-2 are schematic diagrams of structural decomposition of the present invention.

Fig. 2-3 and Fig. 2-4 are schematic diagrams of partial combination examples of the present invention.

Fig. 3-1, Fig. 3-2, and Fig. 3-3 are action diagrams of the embodiment of the present invention.

Fig. 3-4 and Fig. 3-5 are schematic diagrams of another part of the embodiment of the present invention.

Fig. 4-1 and Fig. 4-2 are partial schematic diagrams of embodiments of the present invention.

Fig. 5-1 and Fig. 5-2 are schematic diagrams of another part of the embodiment of the present invention.

Figure 6 is a schematic diagram of an embodiment of the present invention.

Detailed ways

Relevant detailed description and technical contents of the present invention are as follows now in conjunction with the accompanying drawings:

Please refer to Fig. 1, Fig. 2-1, and Fig. 2-2, which are respectively the perspective view of the appearance and the schematic diagram of the exploded structure of the present invention. The feed mechanism 2 uses a main shaft 3 (not shown) connected to the power source of the horizontal cylinder sewing machine 1 to pivotally drive the front rocking shaft parallel to the axis of the main shaft 3 but not coaxial with the axis. 10. The front rocking shaft 10 is driven by the main shaft to form an up and down swing stroke. The front rocking shaft 10 is sleeved with two first eccentric bushing shafts 11 and second eccentric bushing shafts 12 which are eccentric at both ends. The first eccentric One end of sleeve shaft 11 is pivotally provided with a connecting arm 14, and the other end of this connecting arm 14 is pivotally provided with a crank 15 connected to a rear rocking shaft to drive a rear rocking shaft 20 to swing up and down; The other end of the eccentric sleeve shaft 11 and one end of the second eccentric sleeve shaft 12 are connected with a swing unit 30 including a front swing arm 31 and a rear swing arm 31 ′, and one end of the front swing arm 31 is connected to the second eccentric shaft. The sleeve shaft 12, the rear swing arm 31' is connected to the other end of the first eccentric sleeve shaft 11, the other ends of the front swing arm 31 and the rear swing arm 31' are pivotally connected by a pivot 311, 311' One end of the first connecting rod 312, 312' and the second connecting rod 313, 313', and the other end of the first connecting rod 312, 312' is pivotally connected to an adjustment unit 40, 40', please refer to FIG. 2 -3 and shown in Figures 2-4, the adjustment unit 40, 40' includes a counterweight 42, 42' connected to the first connecting rod 312, 312' with a pivot 41, 41', the counterweight Blocks 42, 42' are also provided with a triggering member 43, 43', which is set on the counterweight block 42, 42' by a rotating member 46, 46' passing through a set of shafts 45, 45' , used to pull the counterweight 42, 42' to produce displacement, and a scale 44, 44' is provided to show the position of the corresponding counterweight 42, 42'; and in the second connecting rod The other end of 313, 313' is pivotally provided with a transmission arm group 50, 50', which is used to pivotally connect one end of a fixed transmission shaft 51, 51', and the other end of the transmission shaft 51, 51' is connected by a displacement arm group 60 , 60' use a positioning piece 61, 61' to pass through a limit hole 72, 82 set on a front moving block 70 or a rear moving block 80 provided with a front moving tooth 71 or a rear moving tooth 81, in order to form the For the forward and backward feeding action of the front moving tooth 71 and the rear moving tooth 72, recesses 73, 83 are provided on both sides of the front moving block 70 and the rear moving block 80, and the corresponding protrusions are provided and eccentric to the front rocking shaft 10 And the two protrusions 13, 21 at one end of the rear rocking shaft 20 are used to form the up and down swing stroke of the front moving tooth 71 and the rear moving tooth 81.

Please refer to Figure 3-1, Figure 3-2, and Figure 3-3 at the same time, which are schematic diagrams of the movement of the moving teeth of the present invention, and the movement modes of the front moving teeth 71 and the rear moving teeth 81 are the same, so Shown, and moving the tooth 81 as an example: the main shaft 3 is fixed and rotates according to its axis, driving the swing unit 30, and when the adjustment units 40, 40' on the swing unit 30 are in a position, The swing unit 30 forms an up and down swing action due to the two eccentric sleeve shafts 11, 12 sleeved on the front swing shaft 10, so that the swing unit 30 drives the above-mentioned displacement arm group 50, 50', so that the displacement arm group 50 , 50' drives the corresponding front moving block 70 or rear moving block 80 through the corresponding transmission shaft 51, 51', so that the moving blocks 70, 80 form a reciprocating motion in translation.

Please refer to Fig. 3-4 and Fig. 3-5 at the same time, it is a schematic diagram of the movement of the moving teeth of the present invention, and the action mode of the front moving teeth 71 and the rear moving teeth 81 is the same, so as shown in the figure, and the movement in the future Teeth 81 are taken as an example: when the adjustment unit 40, 40' is in another position, the wrenching member 43, 43' moves the counterweight 42, 42', and at the same time moves the second link of the corresponding swing arm 313, 313' and their corresponding transmission arm groups 50, 50', causing the rotatable radius of gyration of the corresponding transmission shaft 51, 51' to decrease or increase, and the reduction or increase of the radius of gyration forms the phase The translational reciprocating travel distance of the corresponding displacement arm group 60, 60' in the limiting hole 72, 82 is reduced or increased, so that the user can pull the pulling member 43, 43' to the desired suture density. The corresponding scales on the scale members 44 and 44 ′ are used to adjust the translational reciprocating feeding stroke distance of the front moving tooth 71 or the rear moving tooth 81 .

Please also refer to Fig. 4-1, Fig. 4-2, Fig. 5-1, and Fig. 5-2, which are schematic diagrams of the action relationship of the front moving tooth 71 or the rear moving tooth 81 of the present invention: the front rocking shaft 10 The up and down swinging action is that the convex part 13 is connected to the concave part 73 corresponding to the front moving block 70 to form the up and down swing feed of the front moving tooth 71. The above-mentioned connection connecting the front rocking shaft 10 The swing arm 14 and the crank 15 connected thereto are used to form the rear swing shaft 20 to swing up and down, and are also connected to the concave part of the corresponding rear moving block 80 through the convex part 21 provided on the rear swing shaft 20 83 to form the up and down swing feed of the rear movable tooth 81, while the translational reciprocating feed of the front movable tooth 71 and the rear movable tooth 81 passes through the swing unit 30 and the correspondingly connected transmission arm group 50, 50' And the correspondingly connected displacement arm group 60, 60' drives the correspondingly connected front moving block 70 or rear moving block 80 to translate and reciprocate; as shown in Figure 4-1 and Figure 4-2, the front moving The limiting hole 72 provided on the block 70 is used for a positioning member 61 ′ of the displacement arm group 60 ′ to pass through it, and is assembled in the limiting hole 82 provided on the rear moving block 80, so that the positioning member 61 The displacement of ' forms the displacement of the rear and front moving block 80, and is adjusted by the corresponding adjustment unit 40', so that the moving distance of the positioning member 61' in the space formed by the limiting hole 72 can be adjusted by the adjustment unit 40' changes to increase or decrease, and because the rear moving tooth 81 is fixed on the rear moving block 80, a translational reciprocating action is formed; as shown in Figure 5-1 and Figure 5-2, the displacement swing arm 60 The locating piece 61 that connects is installed in the limiting hole 82 that this rear moving block 80 offers, like this, this locating piece 61 is driven by this displacement arm group 60, forms the displacement of this front moving block 70, and is subjected to The corresponding adjustment unit 40 can be used for adjusting the reciprocating feeding distance in translation, and because the front moving tooth 71 is fixed on the front moving block 70, the reciprocating feeding stroke of the front moving tooth 71 also changes with the adjustment unit 40 The length of its travel distance.

Please refer to Fig. 6 at the same time, which is an embodiment diagram of the present invention, as shown in the figure: the front and rear moving tooth differential feed mechanism 2 of the above-mentioned horizontal cylinder sewing machine 1 is installed on the feed cloth of a horizontal cylinder sewing machine 1 The pullers 43, 43' of the adjustment units 40, 40' are arranged on the casing of the horizontal cylinder sewing machine 1 for the user to adjust the front moving teeth 71 or The stroke distance of the translational reciprocating feed of the rear moving tooth 81 can produce needle suture effects or crepe effects of different thicknesses when sewing threads.

Please refer to the diagrams comprehensively. It is worth noting that the present invention mainly drives the front rocking shaft 10 to rotate eccentrically through the rotation of the main shaft, and drives the linkage arm 14 in an eccentric manner to allow the rear rocking shaft 20 to rotate. Swing back and forth, so that the front and rear moving teeth 71, 81 achieve continuous up and down displacement; at the same time, through the rotation of the main shaft, the front and rear swing arms 31, 31' are driven eccentrically to drive two different transmissions respectively. The shafts 51, 51' make them swing back and forth to produce continuous left and right displacement actions of the front and rear moving teeth 71, 81, respectively. The focus of the present invention is to cause the above-mentioned front and rear moving teeth 71, 81 to move up and down, left and right, whether driven by the eccentric rotation of the front rocking shaft 10, or the back and forth swinging of the rear rocking shaft 20, or the two Driven by the swinging back and forth of the transmission shafts 51, 51', the movement is driven by individual transmission or linkage after the main shaft is rotated, so the present invention can respectively control the movement of the two transmission shafts 51, 51'. In terms of the path structure, adjusting units 40, 40' are respectively set to individually control the left and right moving strokes of the front and rear moving teeth 71, 81 that are linked to each other, so that the sewing thickness and needle can be adjusted separately according to the operator's intention. purpose of the differential ratio.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (6)

1. gear differential feed mechanism of moving forward before and after the horizontal cylinder type sewing machine, the feed speed in order to the forward and backward mobile tooth of adjusting the feeding cloth is characterized in that gear differential feed mechanism of moving forward comprises before and after the described horizontal cylinder type sewing machine:

One is connected in the main shaft of described Sewing machines power source;

Two axis of rockings, described two axis of rockings be with the axis parallel of main shaft but non-and described axle center coaxially form be articulated on the described main shaft, and be subjected to described main shaft drives to form one and swing up and down stroke, one of described two axis of rockings for correspondence described before mobile tooth be preceding axis of rocking, another is the back axis of rocking for the mobile tooth in the described back of correspondence;

One swing unit is articulated in described front or rear axis of rocking, includes the front swing arm and the rear-swing arms of the described forward and backward mobile tooth feed distance of two corresponding controls;

Two adjustment units include two balancing weights and two that are articulated in described forward and backward swing arm and are fixedly arranged on pulling piece on the described balancing weight, respectively in order to adjust described before the translation reciprocating feed stroke of the mobile tooth of mobile tooth or back.

2. gear differential feed mechanism of moving forward before and after the horizontal cylinder type sewing machine according to claim 1, it is characterized in that, the other end of described front swing arm and rear-swing arm respectively is pivoted with an end of first, second connecting rod, wherein the other end of second connecting rod is connected with a transmission arm group, described transmission arm group articulates an end of a power transmission shaft, and the other end of described power transmission shaft is by a displacement arm group and corresponding forward and backward mobile tooth formation pivot joint continuous action relation.

3. gear differential feed mechanism of moving forward before and after the horizontal cylinder type sewing machine according to claim 2, it is characterized in that, the balancing weight of described adjustment unit is located at the other end of the first connecting rod that described front swing arm articulates and mobile tooth adjustment unit before being, and the other end of the first connecting rod that articulates of described rear-swing arm and be the mobile tooth adjustment unit in back.

4. gear differential feed mechanism of moving forward before and after the horizontal cylinder type sewing machine according to claim 2, it is characterized in that, described two adjustment units include a pivot respectively, one end of two described pivots is fixedly arranged on the balancing weight of described forward and backward swing arm respectively, the other end of two described pivots forms the relation of pivot joint with the first connecting rod of described forward and backward swing arm respectively again, and the other end in described balancing weight is installed with a pivot button, and is installed with a pulling piece on the described pivot button, in order to the position of the described balancing weight of conversion.

5. gear differential feed mechanism of moving forward before and after the horizontal cylinder type sewing machine according to claim 4, it is characterized in that, described two adjustment units have a scale spare respectively, are located at an end of described pulling piece, in order to represent described corresponding front or rear mobile tooth translation reciprocating feed stroke distances.

6. gear differential feed mechanism of moving forward before and after the horizontal cylinder type sewing machine according to claim 1, it is characterized in that, described pulling piece is arranged at described horizontal cylinder type sewing machine outside, in order to can distinguish the translation reciprocating feed stroke distances of adjusting the mobile tooth of preceding mobile tooth or back in real time.

Images