CN218592407U

CN218592407U - Cutter clamping device

Info

Publication number: CN218592407U
Application number: CN202222477492.6U
Authority: CN
Inventors: 陈业
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2023-03-10
Anticipated expiration: 2032-09-19

Abstract

The utility model provides a cutter clamping device belongs to the fixed technical field of cutter. The problem that the existing tool clamping stress point and the tool working end force arm are long is solved. The cutter clamping device comprises a nut, wherein an elastic collet chuck is arranged between the nut and a motor spindle, a cutter penetrates through the nut and is inserted into a hollow hole of the elastic collet chuck, the elastic collet chuck is contracted through the spiral displacement of the nut and the motor spindle to fix the cutter, a pushing and abutting part which is convexly arranged is arranged in the middle of the outer end surface of the nut, an abutting part which enables the elastic collet chuck to gradually and radially contract is arranged on the elastic collet chuck, the cutter is inserted into the abutting part of the elastic collet chuck, the abutting part of the elastic collet chuck is located in the pushing and abutting part of the nut, and when the nut and the motor spindle are in relative spiral displacement, the pushing and abutting part of the nut enables the abutting part of the elastic collet chuck to gradually and radially contract to fix the cutter. The utility model discloses can effectively shorten cutter centre gripping stress point and the cutter work end arm of force, the cutter is fixed stable.

Description

Cutter clamping device

Technical Field

The utility model belongs to the technical field of the cutter is fixed, a cutter clamping device is related to.

Background

The present invention relates to a tool clamping device, and more particularly, to a tool clamping device for clamping a tool to a spindle, and a tool clamping device for clamping a tool to the spindle.

As shown in fig. 1, a known tool holding apparatus for holding a tool 100, the tool 100 being mounted on a spindle 200 of a machine tool such that the tool 100 is rotated by the spindle 200 along with the spindle 200, includes: the hollow collet 300 and the nut 400, the nut 400 and the spindle 200 of the machine tool are in threaded connection, the tool 100 is inserted into the hollow collet 300 through the nut 400, and the nut 400 and the spindle 200 of the machine tool are threaded to cause the hollow collet 300 to be tightened so that the tool 100 is fixed in the hollow collet 300; as can be seen from fig. 1, the end surface of the main spindle 200 of the machine tool is provided with an assembly channel 201, the assembly channel 201 is a conical guide surface with a large outer part and a small inner part, the hollow collet 300 is a cylindrical body arranged around the vertical axis and comprises a plurality of spaced clamping jaws and a plurality of cutting grooves forming the clamping jaws; viewed from the whole, the hollow collet 300 comprises a conical embedding part 301 and a clamping part 302, wherein the conical embedding part 301 is in a conical shape with a small outer part and a large inner part, the clamping part 302 is in a conical shape with a small outer part and a large inner part, the large head end of the conical embedding part 301 and the large head end of the clamping part 302 are connected to form an integral structure, the conical embedding part 301 is arranged in the assembling channel 201 of the end surface of the main shaft 200 of the machine tool in a penetrating way and pushes against the assembling channel 201 of the end surface of the main shaft 200 to enable the tool 100 to be tightened in the conical embedding part 301 of the hollow collet 300; the clamping portion 302 protrudes through the nut 400 for external auxiliary clamping of the tool 100.

In the above structure, there are the following disadvantages, first: the stress point of the tool which is clamped and fixed on the main shaft of the machine tool is positioned in the main shaft of the machine tool, and the clamping force of the tool is limited; secondly, the method comprises the following steps: the force arm between the working end of the cutter and a force bearing point for clamping and fixing is longer, the stress stability is poorer, and the cutter can be influenced by the resonance of the milling work of the cutter when the stress stability is serious, so that the cutter is broken; thirdly, the steps of: this clamping part is the clamping jaw structure simultaneously, and is lower to the supplementary centre gripping intensity of cutter.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a cutter clamping device, solve cutter centre gripping stress point and the longer problem of the cutter work end arm of force, ensure the cutter fixed stability on motor spindle.

The purpose of the utility model can be realized by the following technical proposal: a cutter clamping device is used for clamping and fixing a cutter and comprises a nut which is spirally connected with a motor spindle, an elastic collet chuck is arranged between the nut and the motor spindle, a hollow hole is formed in the middle of the elastic collet chuck, the cutter penetrates through the nut and is inserted into the hollow hole of the elastic collet chuck, the elastic collet chuck shrinks and fixes the cutter in the hollow hole of the elastic collet chuck through the spiral displacement of the nut and the motor spindle, the cutter clamping device is characterized in that a pushing and supporting part which protrudes outwards is arranged in the middle of the outer end face of the nut, a supported part which gradually shrinks radially and inwards is arranged on the elastic collet chuck, the cutter is inserted into the supported part of the elastic collet chuck, the supported part of the elastic collet chuck is located in the pushing and supporting part of the nut, and when the nut and the motor spindle are in opposite spiral displacement, the supported part of the nut causes the supported part of the elastic collet chuck to gradually shrink radially and inwards to fix the cutter.

The tool clamping device is mainly characterized in that the elastic collet chuck is provided with the supported part, the tool is inserted into the supported part, and the supported part and the pushing part of the nut are matched and fixed with the tool oppositely, so that the tool clamping stress point and the force arm of the tool working end can be effectively shortened, and the tool is stably fixed.

In the above tool clamping device, the elastic collet is tapered, a plurality of first grooves are circumferentially distributed at intervals at the tapered small end of the elastic collet to form a plurality of first clamping jaws, a plurality of second grooves are circumferentially distributed at intervals at the tapered large end of the elastic collet to form a plurality of second clamping jaws, and the first grooves and the second grooves are alternately distributed on the tapered surface of the elastic collet. The purpose of this arrangement is to make the overall deformation of the collet more resilient and functionally stable for the clamping of the tool with radial retraction.

In the above tool holding device, the small end of the tapered shape of the elastic collet chuck is the supported portion, a flared groove for assembling the tool is formed at the hollow hole of the elastic collet chuck of the supported portion, and a step is formed between the bottom of the flared groove and the hollow hole of the elastic collet chuck. The flaring groove is used for inserting a cutter handle of a cutter, and the purpose of the arrangement is to ensure that the clamping length of the cutter handle of each cutter is consistent.

In the above-mentioned tool holding device, the pushing portion is in a hollow conical shape, and the pushing portion and the nut are integrally formed. The end face of the outer end of the nut is provided with a conical boss, the pushing part is integrally formed around the vertical axis, and the structure is integral and high in mechanical strength and stable.

In the above mentioned tool holding device, the conical guide surface of the outer wall of the supported portion is matched with the conical guide surface of the inner wall of the pushing portion. In actual work, the conical guide surface of the outer wall of the supported part is always in interference fit with the inner wall of the pushing part.

In the above-mentioned tool holding device, a circular pad is disposed in a nut between the motor spindle and the elastic collet chuck, the circular pad and the motor spindle are axially abutted and matched, and the circular pad and the conical large end of the elastic collet chuck are axially abutted and matched. The circular base plate is used for axial abutting between the motor spindle and the elastic collet chuck; during actual manufacturing, the outer diameter of the circular base plate is smaller than the inner diameter of the screw cap, and the size of the circular base plate is matched with the size of the axial end face of the motor spindle.

Compared with the prior art, the cutter clamping device has the advantages that:

firstly: the stress point of the tool which is clamped and fixed on the motor spindle is arranged outside the motor spindle, so that the clamping force on the tool is high.

Secondly, the method comprises the following steps: the force arm between the working end of the cutter and the stress point for clamping and fixing is short, and the stress stability is good.

Thirdly, the method comprises the following steps: the pushing part and the nut are integrally formed, the mechanical strength is high and stable, and the pushing clamping strength of the tool is high.

Drawings

Fig. 1 is a perspective view of a known tool holding device in exploded form.

Fig. 2 is a perspective view illustrating the explosion of the tool holding device.

Fig. 3 is a perspective view of the nut of the tool holding device.

Fig. 4 is a perspective view of the collet chuck of the tool holding device of the present invention.

Fig. 5 is a front view schematically showing the structure of the elastic collet in the tool holding device of the present invention.

Fig. 6 isbase:Sub>A schematic sectional structure view ofbase:Sub>A-base:Sub>A in fig. 5.

In the figure, 1, a cutter; 2. a motor spindle; 3. a nut; 4. an elastic collet; 5. a pushing part; 6. a receiving portion; 7. cutting a first groove; 8. a first clamping jaw; 9. cutting a groove II; 10. a second clamping jaw; 11. a flared groove; 12. a circular pad.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 2, 3, 4, 5 and 6, the clamping device of the present tool 1 is mainly used for clamping the tool 1, the clamping device of the present tool 1 mainly comprises a nut 3 for spirally connecting with a motor spindle 2, an elastic collet 4 is disposed between the nut 3 and the motor spindle 2, a hollow hole is disposed at the middle position of the elastic collet 4, the tool 1 is inserted into the hollow hole of the elastic collet 4 through the nut 3, the elastic collet 4 is contracted and the tool 1 is fixed in the hollow hole of the elastic collet 4 by the spiral displacement of the nut 3 and the motor spindle 2, a pushing portion 5 protruding outward is disposed at the middle position of the outer end surface of the nut 3, a receiving portion 6 for gradually contracting the elastic collet 4 in the radial direction is disposed on the elastic collet 4, the tool 1 is inserted into the receiving portion 6 of the elastic collet 4, the receiving portion 6 of the elastic collet 4 is disposed in the pushing portion 5 of the nut 3, and when the nut 3 and the motor spindle 2 are relatively spirally displaced, the pushing portion 5 of the elastic collet 3 causes the receiving portion 6 of the nut 4 to fix the tool 1 in the radial direction.

During actual manufacturing, the elastic collet chuck 4 is in a conical shape, a plurality of first cutting grooves 7 are circumferentially distributed at intervals at the small end of the conical shape of the elastic collet chuck 4 to form a plurality of clamping jaws I8, a plurality of second cutting grooves 9 are circumferentially distributed at intervals at the large end of the conical shape of the elastic collet chuck 4 to form a plurality of clamping jaws II 10, and the first cutting grooves 7 and the second cutting grooves 9 are alternately distributed on the conical surface of the elastic collet chuck 4; the small end of the conical shape of the elastic collet chuck 4 is a supported part 6, a flared groove 11 for assembling the cutter 1 is arranged at the hollow hole of the elastic collet chuck 4 of the supported part 6, and a step is formed between the bottom of the flared groove 11 and the hollow hole of the elastic collet chuck 4.

During actual manufacturing, the pushing part 5 is in a hollow conical shape, the pushing part 5 and the nut 3 are integrally formed, and the pushing part 5 forms a conical boss on the outer end face of the nut 3; the conical guide surface of the outer wall of the supported part 6 is matched with the conical guide surface of the inner wall of the pushing and supporting part 5.

During actual manufacturing, a circular pad 12 is arranged in the nut 3 between the motor spindle 2 and the elastic collet chuck 4, the circular pad 12 is axially abutted and matched with the motor spindle 2, and the circular pad 12 is axially abutted and matched with the large end of the conical shape of the elastic collet chuck 4.

Those not described in detail in this specification are well within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A cutter clamping device is used for clamping a cutter (1) and comprises a nut (3) which is spirally connected with a motor spindle (2), an elastic collet chuck (4) is arranged between the nut (3) and the motor spindle (2), a hollow hole is formed in the middle of the elastic collet chuck (4), the cutter (1) penetrates through the nut (3) and is inserted into the hollow hole of the elastic collet chuck (4), the elastic collet chuck (4) is contracted and the cutter (1) is fixed in the hollow hole of the elastic collet chuck (4) through the spiral displacement of the nut (3) and the motor spindle (2), the cutter clamping device is characterized in that a pushing and abutting part (5) which is convexly arranged is formed in the middle of the outer end face of the nut (3), an abutting part (6) which is gradually radially inwards contracted is arranged on the elastic collet chuck (4), the cutter (1) is inserted into the abutting part (6) of the elastic collet chuck (4), the abutting part (6) of the elastic collet chuck (4) is positioned in the pushing and abutting part (5) of the nut (3), and the nut (3) and the elastic collet chuck (4) are radially inwards displaced, and the nut (5) is used as the nut (3) and the nut (2) and the elastic collet chuck (3) are radially inwards displaced.

2. The tool clamping device according to claim 1, wherein the elastic collet chuck (4) is conical, a plurality of first grooves (7) are circumferentially distributed at intervals at the small end of the conical shape of the elastic collet chuck (4) to form a plurality of first clamping jaws (8), a plurality of second grooves (9) are circumferentially distributed at intervals at the large end of the conical shape of the elastic collet chuck (4) to form a plurality of second clamping jaws (10), and the first grooves (7) and the second grooves (9) are alternately distributed on the conical surface of the elastic collet chuck (4).

3. A tool holding device according to claim 2, characterized in that the conical small end of the resilient collet (4) is the abutment (6), and that the hollow bore of the resilient collet (4) of the abutment (6) has a flared groove (11) for fitting the tool (1), the bottom of the flared groove (11) and the hollow bore of the resilient collet (4) forming a step.

4. A tool holding device according to claim 3, wherein said abutment portion (5) is in the form of a hollow cone, the abutment portion (5) being formed integrally with the nut (3).

5. A tool holding device according to claim 4, wherein the conical guide surface of the outer wall of the abutment portion (6) is adapted to the conical guide surface of the inner wall of the push portion (5).

6. A tool holding device according to claim 2, characterized in that a circular shim plate (12) is arranged in the nut (3) between the motor spindle (2) and the resilient collet (4), said circular shim plate (12) and the motor spindle (2) being axially in abutting engagement, said circular shim plate (12) and the conical shaped big end of the resilient collet (4) being axially in abutting engagement.