TWI880545B - Cutter assembly, cutting assembly and disassembly method of cutting assembly - Google Patents

Abstract

A cutter assembly, a cutting assembly and a disassembly method of cutting assembly. The cutter assembly is configured to be installed on a machine via a mounting housing and includes a shaft, a bearing assembly, an impeller and a cutter. The shaft is disposed through the bearing assembly via tight fit, and the mounting housing is configured to be sleeved on the bearing assembly via tight fit. The impeller is sleeved on the shaft and located on a side of the bearing assembly. The cutter is fixed in a sleeving end of the shaft.

Description

Cutter assembly, cutting tool, and method for disassembling cutting tool

The present invention relates to a tool assembly, a cutting tool and a disassembly method of the cutting tool, and in particular to a tool assembly, a cutting tool and a disassembly method of the cutting tool used for a machine tool.

Cutting, polishing, grinding, etc. of workpieces using tool assemblies clamped on machine tools has become a widely used method in the machinery industry. In recent years, due to the industry's increasing requirements for tool assemblies in various aspects, various improvement plans for tool assemblies have been introduced one after another.

However, it is difficult to make a breakthrough in the service life of traditional tool assemblies. In detail, traditional tool assemblies often need to be discarded as a whole after being used for a period of time, but the only part of the tool assembly that is easily worn out is the bearing assembly. In other words, due to poor structural design, the traditional tool assembly cannot replace the bearing assembly alone, resulting in the tool assembly needing to be discarded as a whole just because the bearing assembly is worn out. As a result, the tool assembly has a short service life.

The present invention provides a tool assembly, a cutting tool and a method for disassembling the cutting tool, so that the bearing assembly in the tool assembly can be replaced independently, thereby extending the service life of the tool assembly.

The tool assembly disclosed in one embodiment of the present invention is used to be installed on a machine tool through an assembly housing and includes a rotating shaft, a bearing assembly, a blade and a tool. The rotating shaft is inserted into the bearing assembly by a tight fit, and the assembly housing is sleeved on the bearing assembly by a tight fit. The blade is sleeved on the rotating shaft and located on one side of the bearing assembly. The tool is fixed in a sleeve end of the rotating shaft.

The cutting tool disclosed in another embodiment of the present invention is used to be installed on a machine tool and includes an assembly housing and a tool assembly. The assembly housing includes a barrel and a clamping rod. The clamping rod is fixed to one end of the barrel and is used to be installed on the machine tool. The barrel has an external air inlet and an external air outlet that are connected to each other. The tool assembly is at least partially disposed in the barrel and includes a rotating shaft, a bearing assembly, at least one impeller and a tool. The rotating shaft is inserted into the bearing assembly in a tight fit, and the barrel is used to be sleeved on the bearing assembly in a tight fit. At least one impeller is sleeved on the rotating shaft and is located on one side of the bearing assembly. The tool is fixed in a sleeve end of the rotating shaft. At least one impeller is driven by an airflow guided from the external air inlet to the external air outlet, and drives the tool to rotate through the rotating shaft.

The present invention discloses a method for disassembling a cutting tool in another embodiment, comprising inserting a pin into an assembly housing of a cutting tool to push a tool assembly out of the assembly housing; placing a bearing assembly of the tool assembly on a fixture, and pushing a rotating shaft and a tool of the tool assembly out of a through hole of the fixture, so that the rotating shaft and the tool are separated from the bearing assembly on the fixture.

According to the tool assembly, cutting tool, and method for disassembling the cutting tool disclosed in the above-mentioned embodiments, the rotating shaft is inserted into the bearing assembly by a tight fit, and the assembly housing is used to be sleeved on the bearing assembly by a tight fit. Therefore, after the tool assembly is pushed out of the assembly housing, the rotating shaft and the tool are pushed out of the through hole of the fixture, so that the rotating shaft and the tool are separated from the bearing assembly on the fixture. Therefore, the bearing assembly left on the fixture can be replaced separately and quickly without replacing the rotating shaft and the tool. In this way, the tool assembly does not need to be discarded as a whole, and the service life of the tool assembly can be extended.

In addition, since the clamping rod fixed to one end of the barrel is installed on the machine tool instead of the shaft, the wear of the shaft during cutting can be reduced. In this way, the service life of the tool assembly can be further extended.

The following detailed description of the features and advantages of the embodiments of the present invention is provided in the embodiments, and the contents are sufficient to enable any person with ordinary knowledge in the field to understand the technical contents of the embodiments of the present invention and implement them accordingly. Moreover, according to the contents disclosed in this specification, the scope of the patent application and the drawings, any person with ordinary knowledge in the field can easily understand the relevant purposes and advantages of the present invention. The following embodiments are further detailed descriptions of the viewpoints of the present invention, but are not intended to limit the scope of the present invention by any viewpoint.

Please refer to Figures 1 to 3. Figure 1 is a three-dimensional view of a cutting tool according to an embodiment of the present invention. Figure 2 is an exploded view of the cutting tool in Figure 1. Figure 3 is a cross-sectional schematic view of the cutting tool in Figure 1. In this embodiment, the cutting tool 10 includes an assembly housing 100, an air inlet and exhaust cylinder 200, and a tool assembly 300.

The assembly housing 100 includes a cylinder 110 and a clamping rod 150. In this embodiment, the cylinder 110 may include an outer cylinder 120 and an inner cylinder 130. The outer cylinder 120 is sleeved and fixed to the inner cylinder 130. In this embodiment, the outer cylinder 120 has a accommodating space 121, an outer air inlet 122, an outer air outlet 123 and a first through hole 124. The outer air inlet 122 is connected to the outer air outlet 123 through the accommodating space 121. The inner cylinder 130 has a middle air inlet 131 and a middle air outlet 132. The outer air inlet 122 is connected to the middle air inlet 131. The outer air outlet 123 is connected to the middle air outlet 132. The clamping rod 150 is fixed to one end of the outer cylinder 120 and is used to be mounted on a chuck (not shown) of a machine tool (not shown). In this embodiment, the clamping rod 150 has a second through hole 151. The second through hole 151 is connected to the accommodating space 121 through the first through hole 124.

The air inlet and exhaust cylinder 200 is disposed in the inner cylinder 130. The air inlet and exhaust cylinder 200 has an inner air inlet 201 and an inner air outlet 202. The outer air inlet 122 is connected to the outer air outlet 123 through the middle air inlet 131, the inner air inlet 201, the middle air outlet 132 and the inner air outlet 202.

In this embodiment, the tool assembly 300 is at least partially disposed in the inner cylinder 130 and includes a shaft 310, a bearing assembly 320, a blade 330, a buffer pad 340, a buffer pad 350, a collet 360, a tool 370, a screw 380 and a nut 390.

The rotating shaft 310 is inserted into the bearing assembly 320 by a tight fit. The inner cylinder 130 is sleeved on the bearing assembly 320 by a tight fit. Therefore, the rotating shaft 310 is rotatably arranged in the inner cylinder 130 through the bearing assembly 320. In this embodiment, in part, the rotating shaft 310 is located in the accommodating space 121, and the bearing assembly 320 is located in the accommodating space 121. In addition, in this embodiment, the bearing assembly 320 includes, for example, two bearings 321 separated from each other, but is not limited thereto. In other embodiments, the bearing assembly may also include one or more than three bearings.

The impeller 330 is sleeved and fixed on the rotating shaft 310. The impeller 330 is located in the accommodating space 121 and is located on one side of the bearing assembly 320. In addition, the impeller 330 is located in the air intake and exhaust cylinder 200.

Please refer to FIG. 2 and FIG. 4 , FIG. 4 is a partial enlarged view of the cross-sectional schematic diagram of the cutting tool in FIG. 3 . The buffer pad 340 is sleeved on the rotating shaft 310 and is located between the blade 330 and the bearing assembly 320 . The buffer pad 340 has an outer peripheral surface 341 and a buffer groove 342 . The buffer groove 342 is radially recessed inward along the outer peripheral surface 341 . In addition, in this embodiment, the air intake and exhaust cylinder 200 further has a wind-blocking groove 203 . The wind-blocking groove 203 is recessed inward from an inner wall surface 204 of the air intake and exhaust cylinder 200 facing the blade 330 . The buffer pad 340 is disposed in the wind-blocking groove 203 . Therefore, the airflow entering the air inlet and outlet cylinder 200 is blocked by the wind blocking groove 203 and is not easy to flow to the bearing assembly 320, thereby preventing the airflow from drying the lubricating oil on the bearing assembly 320. In this way, the service life of the bearing assembly 320 can be further extended.

The buffer pad 350 is sleeved on the rotating shaft 310. The bearing assembly 320 is located between the impeller 330 and the buffer pad 350. The buffer pad 350 has a buffer groove 351. The buffer groove 351 is axially recessed inward from a side of the buffer pad 350 away from the bearing assembly 320.

The collet 360 has an assembly end 361 and a clamping end 362 that are opposite to each other. The assembly end 361 is inserted through the sleeve end 311 of the rotating shaft 310. The clamping end 362 clamps the cutter 370, so that the cutter 370 is fixed to the sleeve end 311 of the rotating shaft 310 through the collet 360. Part of the collet 360 and part of the cutter 370 are located in the accommodating space 121. It should be noted that the collet 360 is only for fixing the cutter 370 more firmly to the rotating shaft 310. In other embodiments, the cutter assembly may not include the collet, and the cutter may be directly clamped by the rotating shaft.

The impeller 330 is driven by an airflow (not shown) guided from the external air inlet 122 to the external air inlet 123, and drives the cutter 370 to rotate through the shaft 310. For example, the external air inlet 122 may be provided with a connector 160, and the airflow may flow from an external device (not shown) to the external air inlet 122 through the connector 160.

The screw 380 fixes the collet 360 and the rotating shaft 310. The nut 390 is screwed into an outer surface 312 of the rotating shaft 310 facing away from the collet 360, so that the screw 380 is more firmly clamped by the rotating shaft 310. In other embodiments, the tool assembly may not include the nut 390. In addition, the screw 380 is only for fixing the collet 360 and the rotating shaft 310 more firmly to each other. In other embodiments, the tool assembly may not include the screw 380.

In addition, in this embodiment, the tool assembly 300 may further include two housings 395 and 396. The housing 395 is sleeved on the rotating shaft 310 and between the two bearings 321. The housing 396 is sleeved on the rotating shaft 310 and located on a side of the buffer pad 350 away from the bearing 321.

The airflow entering the air inlet and outlet cylinder 200 is buffered by the buffer groove 342 of the buffer gasket 340 and/or the buffer groove 351 of the buffer gasket 350, thereby reducing the speed of the airflow when it flows to the bearing assembly 320, thereby preventing the airflow from drying the lubricating oil on the bearing assembly 320. In this way, the service life of the bearing assembly 320 can be further extended.

It should be noted that in other embodiments, the positions of the bearing assembly and the impeller may be interchanged.

Please refer to FIG. 5 and FIG. 6. FIG. 5 and FIG. 6 show the disassembly method of the cutting tool in FIG. 1. The disassembly method of the cutting tool 10 in FIG. 1 will be described below. As shown in FIG. 5, after the cover 396 is removed from the inner cylinder 130, a latch 20 is inserted into the assembly housing 100 of the cutting tool 10 to push all components of the tool assembly 300 except the cover 396 out of the assembly housing 100. For example, the latch 20 is inserted into the second through hole 151 of the clamping rod 150 and the first through hole 124 of the outer cylinder 120, and can extend into the accommodating space 121 to push all components of the tool assembly 300 except the cover 396 out of the assembly housing 100.

Next, as shown in FIG6 , the impeller 330, the bearing assembly 320, the buffer pads 340, 350 and the housing 395 are placed on a jig 30, and the shaft 310, the collet 360 and the cutter 370 are pushed out from a through hole 31 of the jig 30, so that the shaft 310, the collet 360 and the cutter 370 are separated from the impeller 330, the bearing assembly 320, the buffer pads 340, 350 and the housing 395 on the jig 30. In this way, at least one of the impeller 330, the bearing assembly 320, the buffer pads 340, 350 and the housing 395 on the jig 30 can be replaced according to the actual wear and tear.

Other embodiments are listed below for illustration. It must be noted that the following embodiments use the component numbers and some contents of the previous embodiments, wherein the same numbers are used to represent the same or similar components, and the description of the same technical contents is omitted. The description of the omitted parts can refer to the previous embodiments, and the following embodiments will not be repeated.

The present invention is not limited to the air intake and exhaust method of the cutting tool. Please refer to Figures 7 and 8. Figure 7 is a three-dimensional exploded view of a cutting tool according to another embodiment of the present invention. Figure 8 is a three-dimensional view of the exhaust gasket and the air intake and exhaust cylinder in Figure 7. In this embodiment, the cutting tool 10a includes an assembly housing 100, an air intake and exhaust cylinder 200a, an exhaust gasket 250a and a tool assembly 300a. The air intake and exhaust cylinder 200a has two internal air inlets 201a. The exhaust gasket 250a and the buffer gasket 340 are respectively arranged on opposite sides of the air intake and exhaust cylinder 200a. The exhaust gasket 250a has an internal air outlet 251a. Compared to the cutting tool 10 in FIGS. 1 to 4 , in this embodiment, the air inlet and exhaust cylinder 200a does not have an inner air outlet, but the inner air outlet 251a is designed on the exhaust gasket 250a. The outer air inlet 122 is connected to the outer air outlet 123 through the inner air inlet 201a and the inner air outlet 251a. In this embodiment, the tool assembly 300a includes two impellers 330 and does not include the nut 390 in FIG. 2 . In other embodiments, the air inlet and exhaust cylinder may also include an inner air inlet.

Please refer to FIG. 7 and FIG. 9. FIG. 9 is a bottom view of the exhaust gasket, the air intake and exhaust pipe, and the two impellers in FIG. 7. The two impellers 330 are located in the air intake and exhaust pipe 200a and are separated from each other. The two impellers 330 each include a hub 331a and a plurality of blades 332a. The hub 331a is sleeved and fixed to the rotating shaft 310. The blades 332a protrude radially from the hub 331a. In addition, the blades 332a of the two impellers 330 are staggered with each other.

Please refer to Figures 10 and 11. Figure 10 is a schematic cross-sectional view of the exhaust gasket, the exhaust air inlet and one of the blades in Figure 7. Figure 11 is a three-dimensional cross-sectional view of the exhaust gasket, the exhaust air inlet, one of the blades and the buffer gasket in Figure 7. Since the two blades 330 increase the torque of the cutting tool 10 in a similar manner, only one blade 330 is presented in Figure 11 to more clearly illustrate the relationship between the blade 330 and the exhaust gasket 250a. These adjacent blades 332a form a plurality of spaces. These spaces include a plurality of exhaust spaces A and at least two pressurized spaces S. Furthermore, in this embodiment, the number of pressurized spaces S is three. The exhaust space A is connected to the inner air outlet 251a of the exhaust gasket 250a. In other words, the exhaust space A is not shielded by the exhaust gasket 250a. The pressurized space S is shielded by the exhaust gasket 250a. Further, the exhaust gasket 250a shields the entirety of each pressurized space S. In other words, as shown in FIG. 10 , the orthographic projection P of these pressurized spaces S on the exhaust gasket 250a does not overlap with the inner air outlet 251a at all. In addition, the inner air inlet 201a of the air inlet and exhaust cylinder 200a is connected to at least one of the pressurized spaces S.

Through the design of the above-mentioned supercharging space S, the airflow pushing the blade 330 will be compressed in the supercharging space S and the torque generated by the blade 330 will be increased. In addition, by designing that the blades 332a of the two blades 330 are staggered with each other, the degree to which the airflow pushing the blade 330 is compressed in the supercharging space S will be further enhanced, and the torque generated by the blade 330 can be further increased. Based on the above principle, the present invention is not limited to the number of blades 330. In an embodiment with only one blade, as long as the blade can form a supercharging space, the torque generated by the blade can be increased. It should be noted that in other embodiments of implementing the above-mentioned supercharging space design, the buffer gasket may not need to have a buffer groove.

In addition, by increasing the number of blades 330 to two, the rotation speed of the blades 330 can be increased, thereby increasing the rotation speed of the tool 370 in FIG. 7 .

According to the tool assembly, cutting tool, and method for disassembling the cutting tool disclosed in the above-mentioned embodiments, the rotating shaft is inserted into the bearing assembly by a tight fit, and the assembly housing is used to be sleeved on the bearing assembly by a tight fit. Therefore, after the tool assembly is pushed out of the assembly housing, the rotating shaft and the tool are pushed out of the through hole of the fixture, so that the rotating shaft and the tool are separated from the bearing assembly on the fixture. Therefore, the bearing assembly left on the fixture can be replaced separately and quickly without replacing the rotating shaft and the tool. In this way, the tool assembly does not need to be discarded as a whole, and the service life of the tool assembly can be extended.

In addition, since the clamping rod fixed to one end of the barrel is installed on the machine tool instead of the shaft, the wear of the shaft during cutting can be reduced. In this way, the service life of the tool assembly can be further extended.

Although the present invention is disclosed as above with the aforementioned embodiments, they are not used to limit the present invention. Anyone skilled in similar techniques may make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of patent protection of the present invention shall be subject to the scope of the patent application attached to this specification.

10, 10a: cutting tool 100: assembly housing 110: cylinder 120: outer cylinder 121: storage space 122: outer air inlet 123: outer air outlet 124: first perforation 130: inner cylinder 131: middle air inlet 132: middle air outlet 150: clamping rod 151: second perforation 160: joint 200, 200a: air inlet and exhaust cylinder 201, 201a: inner air inlet 202: inner air outlet 203: wind blocking groove 204: inner wall 250a: exhaust gasket 251a: inner air outlet 300, 300a: tool assembly 310: shaft 311: sleeve end 312: outer surface 320: bearing assembly 321: bearing 330: impeller 331a: hub 332a: blade 340: buffer pad 341: outer peripheral surface 342: buffer groove 350: buffer pad 351: buffer groove 360: collet 361: assembly end 362: clamping end 370: tool 380: screw 390: nut 395, 396: housing 20: latch 30: fixture 31: through hole S: pressurized space P: Projection A: Exhaust space

FIG. 1 is a three-dimensional view of a cutting tool according to an embodiment of the present invention. FIG. 2 is an exploded view of the cutting tool in FIG. 1. FIG. 3 is a cross-sectional schematic view of the cutting tool in FIG. 1. FIG. 4 is a partially enlarged view of the cross-sectional schematic view of the cutting tool in FIG. 3. FIG. 5 and FIG. 6 show a method for disassembling the cutting tool in FIG. 1. FIG. 7 is a three-dimensional exploded view of a cutting tool according to another embodiment of the present invention. FIG. 8 is a three-dimensional view of the exhaust gasket and the exhaust inlet pipe in FIG. 7. FIG. 9 is a bottom view of the exhaust gasket, the exhaust inlet pipe and two blades in FIG. 7. FIG. 10 is a bottom cross-sectional schematic view of the exhaust gasket, the exhaust inlet pipe and one of the blades in FIG. 7. Figure 11 is a three-dimensional cross-sectional view of the exhaust gasket, the exhaust air intake pipe, one of the impellers and the buffer gasket in Figure 7.

10: Cutting tools

110: Cylinder

120: Outer cylinder

121: Storage space

124: First piercing

130: Inner cylinder

150: Clamping rod

151: Second piercing

160:Connector

200: Into the exhaust pipe

300: Tool assembly

310: Rotating axis

311: Set end

312: External surface

320: Bearing assembly

321: Bearings

330: Blades

340: Buffer pad

350: Buffer pad

360: Collet

361: Assembly end

362: Clamping end

370: Knives

380: Screw

390: Nut

395,396: Shell

Claims (8)

A cutting tool is used to be installed in a machine tool. The cutting tool comprises: an assembly housing, comprising a barrel and a clamping rod, the clamping rod is fixed to one end of the barrel and is used to be installed in the machine tool, the barrel has an external air inlet and an external air outlet that are connected to each other; and a tool assembly, at least partially disposed in the barrel and comprising: a rotating shaft; a bearing assembly, the The rotating shaft is inserted into the bearing assembly by a tight fit, and the cylinder is sleeved on the bearing assembly by a tight fit; at least one impeller is sleeved on the rotating shaft and located on one side of the bearing assembly; and a tool is fixed in a sleeve end of the rotating shaft, and the at least one impeller is driven by an airflow guided from the external air inlet to the external air outlet, and drives the tool to rotate through the rotating shaft. A cutting tool as described in claim 1, wherein the barrel further has a accommodating space and a first through-hole, the external air inlet is connected to the external air outlet through the accommodating space, the at least one impeller and the bearing assembly are located in the accommodating space, part of the rotating shaft and part of the tool are located in the accommodating space, and the clamping rod has a second through-hole, which is connected to the accommodating space through the first through-hole. A cutting tool as described in claim 1, wherein the tool assembly further includes a buffer pad, which is sleeved on the rotating shaft and located between the at least one impeller and the bearing assembly, and the buffer pad has a buffer groove, which is radially recessed inward along an outer peripheral surface of the buffer pad. The cutting tool as described in claim 3 further includes an air inlet and exhaust cylinder, which is arranged in the cylinder body, and the at least one blade is located in the air inlet and exhaust cylinder. The air inlet and exhaust cylinder has an inner air inlet, an inner air outlet and a choke groove. The outer air inlet is connected to the outer air outlet through the inner air inlet and the inner air outlet. The choke groove is recessed inward from an inner wall surface of the air inlet and exhaust cylinder facing the at least one blade, and the buffer pad is arranged in the choke groove. The cutting tool as described in claim 1 further comprises an air inlet and an air exhaust pad, the tool assembly further comprises a buffer pad, the buffer pad is sleeved on the shaft and is located between the at least one impeller and the bearing assembly, the air inlet and exhaust cylinder is arranged in the cylinder body, the at least one impeller is located in the air inlet and exhaust cylinder, the air inlet and exhaust cylinder has an inner air inlet, the exhaust pad and the buffer pad are respectively arranged on opposite sides of the air inlet and exhaust cylinder, the exhaust pad has an inner air outlet, and the outer air inlet is connected to the inner air outlet through the inner The air inlet and the inner air outlet are connected to the outer air outlet, the at least one impeller includes a hub and a plurality of blades, the hub is sleeved and fixed to the rotating shaft, the blades protrude from the hub, the adjacent blades form a plurality of spaces, the spaces include a plurality of exhaust spaces and at least two pressurized spaces, the exhaust spaces are connected to the inner air outlet of the exhaust gasket, the at least two pressurized spaces are shielded by the exhaust gasket, and the inner air inlet of the air inlet and exhaust cylinder is connected to at least one of the at least two pressurized spaces. A cutting tool as described in claim 5, wherein the number of the at least one blade is two, and the two blades are located in the air inlet and exhaust pipe and separated from each other. A cutting tool as described in claim 6, wherein the blades of the two impellers are offset from each other. A method for disassembling a cutting tool as described in claim 1, comprising: inserting a pin into the assembly housing of the cutting tool to push the tool assembly out of the assembly housing; and placing the bearing assembly of the tool assembly on a jig, and pushing the rotating shaft and the tool of the tool assembly out of a through hole of the jig, so that the rotating shaft and the tool are separated from the bearing assembly on the jig.

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