Tool clamp

Abstract

The utility model belongs to the technical field of tool clamps, and discloses a tool clamp. The tool clamp comprises an inner supporting piece, a clamping piece and a plurality of flexible pieces, the inner supporting piece comprises a first connecting part and an inner supporting part, and scale marks are arranged on the outer wall of the first connecting part; the clamping piece is arranged outside the inner supporting piece in a sleeving manner, the clamping piece comprises a second connecting part and a clamping part, and the clamping part is configured to be arranged in the mounting hole of the ball head; the multiple flexible pieces are arranged on the outer wall of the clamping part in the circumferential direction at intervals. When the ball head is clamped and the inner supporting piece moves forwards relative to the clamping piece in the axis direction of the clamping piece, due to the fact that the cross sectional area of the inner supporting part is gradually reduced from back to front, the clamping part is gradually supported by the inner supporting piece, and the multiple flexible pieces are gradually abutted against the mounting hole so as to clamp the ball head. The ball head is clamped through the mounting hole, so that the outer wall of the ball head is not easy to deform; and the flexible part abuts against the mounting hole, so that the inner wall of the mounting hole cannot be abraded. And by arranging scale marks, the clamping degree of the ball head can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling fixtures, in particular to a tooling fixture. Background Art

[0002] In the process of manufacturing workpieces, tooling fixtures are required to clamp the workpieces for further processing. In the medical field, during the forming process of hip joint ceramic ball heads, special tooling fixtures are needed to clamp the ceramic ball heads during the process of turning the outer shape after pressing the blank or grinding the spherical surface after sintering.

[0003] During use, relatively high requirements are placed on the accuracy and surface finish of the ceramic ball heads. There are few existing tooling fixtures for clamping ceramic ball heads. If traditional tooling fixtures are used to clamp the ceramic ball heads, the tooling fixtures are mainly pressed against the outer wall of the ceramic ball heads to fix them. However, this easily causes deformation of the outer wall and affects the accuracy of the ceramic ball heads. Therefore, there is an urgent need for a tooling fixture that can clamp the ceramic ball heads while not easily deforming the outer walls of the ceramic ball heads. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a tooling fixture that can clamp the ball head while not easily deforming the outer wall of the ball head, not damaging the ball head, and being able to adjust the clamping degree of the ball head.

[0005] To achieve the above object, the utility model adopts the following technical solutions:

[0006] A tooling fixture, comprising:

[0007] An inner support member, including a first connection portion and an inner support portion. The inner support portion is arranged at the front end of the first connection portion. A scale line is provided on the outer wall of the first connection portion. The cross-sectional area of the inner support portion gradually decreases from the rear to the front;

[0008] A clamping member, sleeved outside the inner support member. The inner support member can move relative to the clamping member along the axial direction of the clamping member. The scale line is used to indicate the moving distance of the inner support member relative to the clamping member. The clamping member includes a second connection portion and a clamping portion. The clamping portion is arranged at the front end of the second connection portion. The clamping portion is configured to be arranged in the mounting hole of the ball head;

[0009] A plurality of flexible members, circumferentially and spacedly arranged on the outer wall of the clamping portion. When the inner support member moves forward relative to the clamping member along the axial direction of the clamping member, the plurality of flexible members can be made to abut against the mounting hole.

[0010] In some possible embodiments, a plurality of first through grooves are circumferentially and spacedly recessed on the front end face of the clamping portion. The first through grooves communicate with the inner cavity of the clamping portion and penetrate through the outer wall of the clamping portion.

[0011] In some possible embodiments, the clamping portion includes a third connecting portion and a clamping body. The third connecting portion is connected to the second connecting portion. The clamping body is disposed in the mounting hole, and the cross-sectional area of the third connecting portion is smaller than the cross-sectional area of the rear end face of the clamping body.

[0012] In some possible embodiments, the first through groove sequentially passes through the clamping body and the third connecting portion from the front end of the clamping body and extends to the front end of the second connecting portion.

[0013] In some possible embodiments, a plurality of second through grooves are spacedly provided on the outer wall of the clamping portion. A plurality of the flexible members are correspondingly provided with the plurality of second through grooves one by one, and the flexible members are clamped in the second through grooves.

[0014] In some possible embodiments, an external thread is provided on the outer wall of the first connecting portion, and an internal thread is provided on the inner wall of the second connecting portion. The internal thread is threadedly connected to the external thread, and the scale line is provided on a side of the external thread away from the inner supporting portion.

[0015] In some possible embodiments, a clamping groove is recessed on the rear end face of the first connecting portion. The clamping groove is used to assist in rotating the inner supporting member.

[0016] In some possible embodiments, the inner supporting portion is a conical structure, and the size of the cone angle of the inner supporting portion is greater than 2.75 degrees and less than or equal to 8.75 degrees.

[0017] In some possible embodiments, the size of the cone angle of the inner supporting portion is 5.75 degrees.

[0018] In some possible embodiments, the clamping portion includes a clamping body. The clamping body is disposed in the mounting hole; the inner cavity of the clamping body is a conical structure, and the cone angle of the inner cavity of the clamping body is the same as the cone angle of the inner supporting portion; the outer wall of the clamping body is a conical structure, and the cone angle of the outer wall of the clamping body is the same as the cone angle of the inner supporting portion.

[0019] The beneficial effects of the present utility model:

[0020] The tooling fixture provided by the present utility model includes an inner support member, a clamping member, and a plurality of flexible members. When clamping the ball head, the clamping member and the flexible members are assembled and installed in the mounting hole of the ball head. When the inner support member moves forward relative to the clamping member along the axial direction of the clamping member, since the cross-sectional area of the inner support portion gradually decreases from the rear to the front, the inner support member gradually expands the clamping portion, causing the plurality of flexible members to gradually abut against the mounting hole, thereby achieving the clamping of the ball head. In addition, by clamping the ball head through the mounting hole, it is not easy to deform the outer wall of the ball head; by abutting the flexible members against the mounting hole, hard contact between the clamping portion and the inner wall of the mounting hole can be avoided, and the inner wall of the mounting hole will not be worn. The scale line is used to indicate the moving distance of the inner support member relative to the clamping member. The longer the distance that the inner support member moves forward relative to the clamping member along the axial direction of the clamping member, the tighter the clamping degree of the ball head. By setting the scale line, the clamping degree of the ball head can be adjusted. Description of the Drawings

[0021] Figure 1 is the structural schematic diagram of the first perspective of the tooling fixture provided by the present utility model;

[0022] Figure 2 is the structural schematic diagram of the second perspective of the tooling fixture provided by the present utility model;

[0023] Figure 3 is the assembly drawing of the tooling fixture and the ball head provided by the present utility model;

[0024] Figure 4 is the structural schematic diagram of the inner support member involved in the present utility model;

[0025] Figure 5 is the structural schematic diagram of the clamping member involved in the present utility model;

[0026] Figure 6 is Figure 5 the cross-sectional view along the A-A direction.

[0027] In the figure:

[0028] 1, inner support member; 11, first connection portion; 111, external thread; 112, clamping groove; 12, inner support portion; 13, scale line;

[0029] 2, clamping member; 21, second connection portion; 22, clamping portion; 221, first through groove; 222, third connection portion; 223, clamping body; 224, second through groove;

[0030] 3, flexible member;

[0031] 100, ball head; 101, mounting hole. Detailed Embodiments

[0032] The following further describes the present utility model in detail with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0033] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0035] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0036] Such as Figures 1 to 6As shown in the figure, the utility model provides a tooling fixture, which includes an inner support member 1, a clamping member 2 and a plurality of flexible members 3. The inner support member 1 includes a first connecting portion 11 and an inner support portion 12. The inner support portion 12 is arranged at the front end of the first connecting portion 11. A scale line 13 is provided on the outer wall of the first connecting portion 11. The cross-sectional area of the inner support portion 12 gradually decreases from the rear to the front. The clamping member 2 is sleeved outside the inner support member 1. The inner support member 1 can move relative to the clamping member 2 along the axial direction of the clamping member 2. The scale line 13 is used to indicate the moving distance of the inner support member 1 relative to the clamping member 2. The clamping member 2 includes a second connecting portion 21 and a clamping portion 22. The clamping portion 22 is arranged at the front end of the second connecting portion 21. The clamping portion 22 is configured to be arranged in the mounting hole 101 of the ball head 100. The plurality of flexible members 3 are circumferentially and spacedly arranged on the outer wall of the clamping portion 22. When the inner support member 1 moves forward relative to the clamping member 2 along the axial direction of the clamping member 2, the plurality of flexible members 3 can be made to abut tightly against the mounting hole 101. When clamping the ball head 100, the clamping member 2 and the flexible members 3 are assembled and installed in the mounting hole 101 of the ball head 100. When the inner support member 1 moves forward relative to the clamping member 2 along the axial direction of the clamping member 2, since the cross-sectional area of the inner support portion 12 gradually decreases from the rear to the front, the inner support member 1 gradually expands the clamping portion 22, so that the plurality of flexible members 3 gradually abut tightly against the mounting hole 101, thereby realizing the clamping of the ball head 100. In addition, by clamping the ball head 100 through the mounting hole 101, it is not easy to cause deformation of the outer wall of the ball head 100. By making the flexible members 3 abut tightly against the mounting hole 101, hard contact between the clamping portion 22 and the inner wall of the mounting hole 101 can be avoided, and the inner wall of the mounting hole 101 will not be worn. The scale line 13 is used to indicate the moving distance of the inner support member 1 relative to the clamping member 2. The longer the moving distance of the inner support member 1 relative to the clamping member 2 along the axial direction of the clamping member 2, the tighter the clamping degree of the ball head 100. By setting the scale line 13, the clamping degree of the ball head 100 can be adjusted. Optionally, the material of the flexible member 3 is silicone, which has a certain strength and will not cause wear to the inner wall of the mounting hole 101. Optionally, the flexible member 3 is a cylindrical structure.

[0037] Optionally, in this embodiment, as Figure 2 shown, a plurality of first through grooves 221 are circumferentially and spacedly recessed on the front end face of the clamping portion 22. The first through grooves 221 communicate with the inner cavity of the clamping portion 22 and penetrate through the outer wall of the clamping portion 22. By providing the plurality of first through grooves 221, when the clamping member 2 moves forward, a certain elastic deformation space is provided for the clamping portion 22, which is convenient for expanding the clamping portion 22 and also convenient for the flexible members 3 to abut tightly against the mounting hole 101. For the convenience of processing, in this embodiment, the plurality of first through grooves 221 are equally spaced and recessed on the front end face of the clamping portion 22.

[0038] Optionally, in this embodiment, as Figure 5 and Figure 6As shown, the clamping portion 22 includes a third connecting portion 222 and a clamping body 223. The third connecting portion 222 is connected to the second connecting portion 21. The clamping body 223 is disposed within the mounting hole 101. The cross-sectional area of the third connecting portion 222 is smaller than the cross-sectional area of the rear end face of the clamping body 223. With such a setting, a certain elastic deformation can be provided, making it more convenient to expand the clamping body 223. Optionally, in this embodiment, the first through groove 221 sequentially passes through the clamping body 223 and the third connecting portion 222 from the front end of the clamping body 223, and extends to the front end of the second connecting portion 21. With such a setting, it is more beneficial to expand the clamping body 223. In other embodiments, the first through groove 221 passes through the clamping body 223 from the front end of the clamping body 223 and extends to the front end of the third connecting portion 222. In addition, during installation, in order to facilitate the clamping member 2 to enter the mounting hole 101 of the ball head 100, in this embodiment, a chamfer is provided on the outer edge of the front end of the clamping body 223.

[0039] Optionally, in this embodiment, as Figure 2 and Figure 5 shown, a plurality of second through grooves 224 are provided at intervals on the outer wall of the clamping portion 22. A plurality of flexible members 3 are provided in one-to-one correspondence with the plurality of second through grooves 224, and the flexible members 3 are snap-fitted into the second through grooves 224. During installation, the flexible members 3 are snapped into the second through grooves 224, which is convenient and firm for installation. When the clamping portion 22 moves forward, the flexible members 3 are not easily dropped. In other embodiments, the flexible members 3 are adhesively bonded to the outer wall of the clamping portion 22, and it is only necessary to fix the flexible members 3 to the clamping portion 22, not limited to this embodiment.

[0040] Optionally, in this embodiment, as Figure 4 shown, an external thread 111 is provided on the outer wall of the first connecting portion 11, and an internal thread is provided on the inner wall of the second connecting portion 21. The internal thread is threadedly connected to the external thread 111. The scale line 13 is provided on the side of the external thread 111 away from the inner support portion 12. The first connecting portion 11 and the second connecting portion 21 are threadedly connected to move the inner support member 1 relative to the clamping member 2 along the axial direction of the clamping member 2. The connection is firm, and the inner support member 1 will not come out of the clamping member 2. In other embodiments, the outer wall of the first connecting portion 11 is slidably connected to the inner wall of the second connecting portion 21 to realize the movement of the inner support member 1 relative to the clamping member 2.

[0041] Optionally, as Figure 4 shown, a clamping groove 112 is recessed in the rear end face of the first connecting portion 11. The clamping groove 112 is used to assist in rotating the inner support member 1. In this embodiment, the clamping groove 112 is an internal hexagonal groove. The wrench is snap-fitted into the internal hexagonal groove, and then the inner support member 1 is rotated through the wrench, thereby realizing the movement of the inner support member 1 relative to the clamping member 2. In other embodiments, two handles are oppositely provided on the outer wall of the first connecting portion 11, and the inner support member 1 is rotated by hand through the two handles to realize the movement of the inner support member 1 relative to the clamping member 2.

[0042] Optionally, the inner support portion 12 is a conical structure, which is convenient for processing. The cone angle of the inner support portion 12 is greater than 2.75 degrees and less than or equal to 8.75 degrees, and the clamping effect on the ball head 100 is better. If the cone angle is too small, the adjustment range of the clamping degree is small, and the optimal clamping force on the ball head 100 may not be obtained. If the cone angle is too large, the adjustment range of the clamping degree is large, and the situation may occur that the ball head 100 is disengaged from the clamping portion 22 due to excessive force. Optionally, in this embodiment, the cone angle of the inner support portion 12 is 5.75 degrees, and the clamping effect on the ball head 100 is better.

[0043] Optionally, as Figure 6 shown, the clamping portion 22 includes a clamping body 223, and the clamping body 223 is disposed in the mounting hole 101; the inner cavity of the clamping body 223 is a conical structure, and the cone angle of the inner cavity of the clamping body 223 is the same as the cone angle of the inner support portion 12; the outer wall of the clamping body 223 is a conical structure, and the cone angle of the outer wall of the clamping body 223 is the same as the cone angle of the inner support portion 12. According to the scale line 13, the moving distance of the inner support portion 12 forward can be obtained. Since the cone angle of the inner cavity of the clamping body 223 and the cone angle of the outer wall of the clamping body 223 are both the same as the cone angle of the inner support portion 12, it is convenient to obtain the clamping degree of the clamping body 223 on the ball head 100 according to the scale line 13.

[0044] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A fixture, characterized in that: include: An inner support member (1) comprises a first connecting portion (11) and an inner support portion (12), wherein the inner support portion (12) is arranged at the front end of the first connecting portion (11), a scale mark (13) is arranged on the outer wall of the first connecting portion (11), and a cross-sectional area of ​​the inner support portion (12) gradually decreases from the back to the front; The clamping member (2) is sleeved outside the inner support member (1), and the inner support member (1) can move relative to the clamping member (2) along the axial direction of the clamping member (2), and the scale line (13) is used to indicate the moving distance of the inner support member (1) relative to the clamping member (2); the clamping member (2) comprises a second connecting portion (21) and a clamping portion (22), and the clamping portion (22) is arranged at the front end of the second connecting portion (21); the clamping portion (22) is configured to be arranged in the mounting hole (101) of the ball head (100); A plurality of flexible members (3) are arranged at circumferential intervals on the outer wall of the clamping portion (22); when the inner support member (1) moves forward relative to the clamping member (2) along the axial direction of the clamping member (2), the plurality of flexible members (3) can be tightly pressed against the mounting hole (101).

2. The fixture according to claim 1, characterized in that: A plurality of first through grooves (221) are concavely formed at intervals in the circumferential direction on the front end surface of the clamping portion (22); the first through grooves (221) are communicated with the inner cavity of the clamping portion (22) and penetrate the outer wall of the clamping portion (22).

3. The fixture according to claim 2, characterized in that: The clamping portion (22) comprises a third connecting portion (222) and a clamping body (223); the third connecting portion (222) is connected to the second connecting portion (21); the clamping body (223) is arranged in the mounting hole (101); and the cross-sectional area of ​​the third connecting portion (222) is smaller than the cross-sectional area of ​​the rear end surface of the clamping body (223).

4. The fixture according to claim 3, characterized in that: The first through groove (221) passes through the clamping body (223) and the third connecting portion (222) in sequence from the front end of the clamping body (223), and extends to the front end of the second connecting portion (21).

5. The fixture according to claim 1, characterized in that: The outer wall of the clamping portion (22) is provided with a plurality of second through slots (224) at intervals, the plurality of flexible members (3) are arranged in one-to-one correspondence with the plurality of second through slots (224), and the flexible members (3) are snap-fitted into the second through slots (224).

6. The fixture according to any one of claims 1 to 5, characterized in that: The outer wall of the first connecting portion (11) is provided with an external thread (111), the inner wall of the second connecting portion (21) is provided with an internal thread, the internal thread is threadedly connected to the external thread (111), and the scale line (13) is arranged on a side of the external thread (111) away from the inner support portion (12).

7. The fixture according to claim 6, characterized in that: A clamping groove (112) is recessed on the rear end surface of the first connecting portion (11), and the clamping groove (112) is used to assist in rotating the inner support member (1).

8. The fixture according to any one of claims 1 to 5, characterized in that: The inner supporting portion (12) is a conical structure, and the cone angle of the inner supporting portion (12) is greater than 2.75 degrees and less than or equal to 8.75 degrees.

9. The fixture according to claim 8, characterized in that: The taper angle of the inner support portion (12) is 5.75 degrees.

10. The fixture according to claim 8, characterized in that: The clamping portion (22) comprises a clamping body (223), and the clamping body (223) is arranged in the mounting hole (101); the inner cavity of the clamping body (223) is a conical structure, and the cone angle of the inner cavity of the clamping body (223) is the same as the cone angle of the inner support portion (12); the outer wall of the clamping body (223) is a conical structure, and the cone angle of the outer wall of the clamping body (223) is the same as the cone angle of the inner support portion (12).

Images