Follow-up clamp

Abstract

The utility model discloses a follow-up clamp which comprises a support body provided with a positioning portion. The movable part is provided with a mounting part and a positioning matching part, the positioning matching part is used for forming positioning matching with the positioning part, and the movable part is used for moving in the first direction when the mounting part is subjected to acting force in the first direction; and the elastic connecting piece is used for driving the movable piece to return and keep the movable piece in a preset posture. According to the follow-up clamp, the movable piece and the elastic connecting piece are arranged on the support body, the movable piece is used for moving in the first direction when the installation part is subjected to the acting force in the first direction, and the elastic connecting piece is used for driving the movable piece to return and keep the movable piece in the preset posture. Therefore, the operation tool can always keep abutting against the parting surface of the product along with the change of the outer contour of the burr of the product.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding tools, in particular to a follow-up fixture. Background Art

[0002] In the forming process, due to the generation of burrs on the parting surface, the burrs are not required for the product, so the burrs need to be removed. When removing burrs manually, a handheld pneumatic pen can be used. Through the cooperation of the hand and the eye, the burrs can be removed by following the outer contour of the burrs and grinding.

[0003] However, the labor intensity of manually removing burrs is relatively large. In order to reduce the labor intensity and improve the degree of automation at the same time, currently, a manipulator or a linear module is mainly used to clamp a pneumatic tool for grinding. Due to the uncertainty of the outer contour of the burrs, if the tool is too close to the product during grinding, the excessive friction force during grinding will cause the grinding head not to rotate. If the tool is too far from the product, the expected goal cannot be achieved. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a follow-up fixture to solve the existing problems, improve the applicability of the grinding tool, and enable the grinding tool to automatically adjust the distance from the product along with the outer contour of the burrs so as to remove different burrs.

[0005] The utility model provides a follow-up fixture, including:

[0006] A bracket body, which is provided with a positioning part;

[0007] A movable part, at least part of which is received in the bracket body. An installation part and a positioning and cooperating part are provided on the movable part. The installation part is used for installing an operating tool, and the positioning and cooperating part is used to form a positioning cooperation with the positioning part so that the movable part maintains a preset posture. The movable part is used to move along a first direction when a force moving along the first direction acts on the installation part. At least part of the positioning and cooperating part abuts against the positioning part, and a preset included angle is formed between the first direction and the axial direction of the installation part;

[0008] An elastic connecting piece, which is respectively connected with the bracket body and the movable part, and is used for driving the movable part to return and maintain the preset posture.

[0009] For a follow-up fixture as described above, preferably, the positioning part includes at least two positioning blocks. The first ends of the positioning blocks are connected with the bracket body, and a guiding gap is formed between two adjacent positioning blocks. The positioning and cooperating part includes a positioned block, and the first end of the positioned block is connected with the movable part. When the movable part is in the preset posture, the positioned block is in clearance fit with the guiding gap.

[0010] A follow-up clamp as described above, wherein preferably, the positioning portion and the positioning matching portion are each provided with a plurality, the plurality of positioning portions and the plurality of positioning matching portions are arranged in a one-to-one correspondence, the plurality of positioning portions are arranged in a ring-shaped interval with a preset axis as the center line, and the extension direction of the guide gap points to the preset axis.

[0011] In the follow-up clamp as described above, preferably, three of the positioning portions and three of the positioning matching portions are provided, and the three positioning portions are arranged in a ring-shaped manner with the preset axis as the center line.

[0012] A follower clamp as described above, wherein preferably, a first guide arc surface is formed on the second end of the positioning block, and a second guide arc surface is formed on the second end of the positioned block, and when the movable part moves along the first direction, the second guide arc surface abuts against the first guide arc surface.

[0013] In the above-mentioned follower clamp, preferably, the bracket body includes a first plate body and a second plate body which are arranged opposite to each other, an installation space is formed between the first plate body and the second plate body, and the movable member and the elastic connecting member are both accommodated in the installation space, wherein:

[0014] The positioning portion is formed on the first plate body and / or the second plate body, a positioning matching surface is formed on a side of the movable member facing the positioning portion, and the positioning matching portion is formed on the positioning matching surface;

[0015] One end of the elastic connecting member is connected to the first plate body or the second plate body, and the other end of the elastic connecting member is connected to the movable member.

[0016] A follow-up clamp as described above, wherein preferably,

[0017] The positioning portion is formed on a side of the first plate body facing the installation space;

[0018] The movable member comprises a first split body and a second split body connected coaxially, the outer diameter of the first split body is larger than the outer diameter of the second split body, a step surface is formed between the first split body and the second split body, and the positioning matching surface is formed on a side of the first split body away from the second split body;

[0019] The elastic connecting member includes a spring, and the spring is inserted into the second split body. One end of the spring abuts against the step surface, and the other end of the spring abuts against the second plate body.

[0020] A follow-up fixture as described above, wherein, preferably, a first card slot is recessed on the step surface, a second card slot is recessed on one side of the second plate body facing the movable member, one end of the spring is embedded in the first card slot, and the other end of the spring is embedded in the second card slot.

[0021] A follow-up fixture as described above, wherein, preferably, the installation part is an installation groove penetrating through the movable member, the working tool is fixed in the installation groove by interference fit, and a plurality of the positioning and fitting parts are distributed at intervals in the circumferential direction of the outer periphery of the installation groove.

[0022] A follow-up fixture as described above, wherein, preferably, the first plate body and the second plate body are connected by a plurality of connecting rods.

[0023] Compared with the prior art, the follow-up fixture of the present utility model is provided with a movable member and an elastic connecting member on the support body. The working tool is installed on the movable member. The movable member is used to move along the first direction when a force along the first direction is applied to the installation part, and the elastic connecting member is used to drive the movable member to return and maintain the preset posture. Therefore, when the working tool acts on the parting surface of the product, it can always be in contact with the parting surface of the product along with the change of the outer contour of the product burr, and different burrs are removed, which is beneficial to improving the efficiency of burr removal. Description of the Drawings

[0024] Figure 1 is a perspective view of the follow-up fixture provided by the embodiment of the present utility model;

[0025] Figure 2 is a perspective view of the movable member maintaining the preset posture provided by the embodiment of the present utility model;

[0026] Figure 3 is a front view of the movable member maintaining the preset posture provided by the embodiment of the present utility model;

[0027] Figure 4 is a perspective view of the first perspective of the support body provided by the embodiment of the present utility model;

[0028] Figure 5 is a perspective view of the second perspective of the support body provided by the embodiment of the present utility model;

[0029] Figure 6 is a perspective view of the first perspective of the movable member provided by the embodiment of the present utility model;

[0030] Figure 7 is a perspective view of the second perspective of the movable member provided by the embodiment of the present utility model.

[0031] Description of the Reference Numerals:

[0032] 100 - Follow - up fixture, 200 - Operating tool, 300 - Product, 301 - Flash;

[0033] 10 - Bracket body, 11 - Positioning part, 111 - Positioning block, 112 - Guide gap, 113 - First guiding sliding arc surface, 12 - First plate body, 13 - Second plate body, 131 - Second card slot, 14 - Installation space, 15 - Connecting rod;

[0034] 20 - Movable part, 21 - Installation part, 22 - Positioning and mating part, 221 - Positioned block, 222 - Second guiding sliding arc surface, 23 - Positioning and mating surface, 24 - First split body, 25 - Second split body, 26 - Step surface, 261 - First card slot;

[0035] 30 - Elastic connecting piece;

[0036] D1 - First direction. Specific embodiments

[0037] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] Refer to Figures 1 to 7 As shown, the embodiment of the present application provides a follow - up fixture 100. The follow - up fixture 100 is used to install an operating tool 200. Preferably, the operating tool 200 is a grinding tool for grinding the parting surface of the product 300 to remove the flash 301 of the product 300. The follow - up fixture 100 includes a bracket body 10, a movable part 20, and an elastic connecting piece 30, wherein:

[0039] The bracket body 10 is a supporting component of the follow - up fixture 100. The movable part 20 and the elastic connecting piece 30 are both partially or entirely received in the bracket body 10, and a positioning part 11 is provided on the bracket body 10.

[0040] The movable part 20 is provided with an installation part 21 and a positioning and mating part 22, and the operating tool 200 is fixed in the installation part 21. In the embodiment provided by the present application, refer to Figures 1 to 3As shown, when the working tool 200 is working, the grinding component of the working tool 200 fits against the parting surface of the product 300. If there is no burr 301 on the parting surface of the product 300 or after the burr 301 is removed, the parting surface of the product 300 abuts against or maintains a preset distance from the working tool 200, and the movable member 20 does not move and remains in a preset posture. When the parting surface of the product 300 has a burr 301, since the outer contour of the burr 301 is an irregular shape, as the working tool 200 continuously moves along the parting surface of the product 300, the force exerted on the working tool 200 by the product 300 will change with the change of the outer contour shape of the burr 301. When the surface of the burr 301 protrudes more from the parting surface of the product 300, the working tool 200 will receive a greater force from the product 300. When the surface of the burr 301 protrudes less from the parting surface of the product 300, the working tool 200 will receive a smaller force from the product 300.

[0041] The positioning and mating portion 22 is used to form a positioning and mating with the positioning portion 11 so that the movable member 20 is maintained in a preset posture. The movable member 20 is used to move along the first direction when the mounting portion 21 receives a force along the first direction D1.

[0042] Specifically, when the force in the first direction D1 received by the working tool 200 is greater than the threshold value, the movable member 20 moves along the first direction D1. The force in the first direction D1 is the force exerted on the working tool 200 by the product 300. When the parting surface of the product 300 has a burr 301, the protruding burr 301 exerts a force on the working tool 200. In order to make the working tool 200 always abut against the burr 301 so that the working tool 200 can grind the burr 301, after the force exceeds the threshold value, the working tool 200 will move along the first direction D1, and the axis of the working tool 200 changes from a vertical state to an inclined state, and is set at an angle with the first direction D1. The angle between the axis of the working tool 200 and the first direction D1 will change with the change of the outer contour shape of the burr 301. The movable member 20 will move synchronously along the first direction D1 with the movement of the working tool 200. At this time, the positioning and mating portion 22 is in partial contact or separation with the positioning portion 11 to release the preset posture of the movable member 20.

[0043] During the process of the movable member 20 moving along the first direction D1, the elastic connecting member 30 undergoes elastic deformation and stores elastic force. This elastic force causes the working tool 200 to tend to return to the preset posture. This tendency makes the grinding component of the working tool 200 always fit against the burr 301. When the force in the first direction D1 received by the working tool 200 is less than the threshold value, the elastic force stored in the elastic connecting member 30 acts on the movable member 20, causing the movable member 20 to move in the direction of the preset posture and finally return to and maintain the preset posture.

[0044] Based on the above embodiments, the working principle of the follow - up fixture 100 of the present application is as follows: The working tool 200 is fixed to the mounting portion 21, and the working tool 200 acts on the parting surface of the product 300. In the initial state, the positioning portion 11 abuts against the positioning cooperation portion 22, and the movable member 20 is maintained in a preset posture. When the working tool 200 contacts the flash 301 on the parting surface of the product 300, the protruding flash 301 has a force on the working tool 200. After this force exceeds the threshold value, the working tool 200 moves along the first direction D1, and the movable member 20 moves synchronously along the first direction D1 with the working tool 200. At this time, the positioning cooperation portion 22 is partially or completely separated from the positioning portion 11, releasing the preset posture of the movable member 20, and the elastic connecting member 30 undergoes elastic deformation during the movement of the movable member 20 to accumulate elastic force.

[0045] Due to the uncertainty of the outer contour shape of the flash 301, the working tool 200 will swing under different forces as the outer contour shape of the flash 301 changes, and then the movable member 20 moves synchronously with the movement of the working tool 200. When the grinding is completed, the force acting on the working tool 200 in the first direction D1 decreases. The elastic force accumulated by the elastic connecting member 30 during the movement of the movable member 20 can make the grinding part of the working tool 200 always fit on the flash 301 and can drive the movable member 20 to return and maintain the preset posture. Under the action of the follow - up fixture 100, the working tool 200 can adapt to the shape of the outer contour of the flash 301 of the product 300 and always abut against the flash 301, thereby grinding it, without adjusting the distance between the working tool 200 and the product 300 according to the shape of the outer contour of the flash 301, improving the grinding efficiency and reducing the labor intensity at the same time.

[0046] In the embodiments provided by the present application, referring to Figures 1 to 4 As shown, the positioning portion 11 includes at least two positioning blocks 111. The first ends of the positioning blocks 111 are connected to the support body 10, and a guiding gap 112 is formed between two adjacent positioning blocks 111. The positioning cooperation portion 22 includes a positioned block 221. The first end of the positioned block 221 is connected to the movable member 20. When the movable member 20 is in the preset posture, the positioned block 221 is in clearance fit within the guiding gap 112. When the force acting on the working tool 200 in the first direction D1 is less than the threshold value, the second end of the positioned block 221 is located within the guiding gap 112 between two adjacent positioning blocks 111 to form a positioning cooperation, so that the movable member 20 can maintain the preset posture.

[0047] In a feasible implementation, a plurality of positioning parts 11 and a plurality of positioning and mating parts 22 are provided. The plurality of positioning parts 11 and the plurality of positioning and mating parts 22 are arranged in one-to-one correspondence. The plurality of positioning parts 11 are arranged at annular intervals with a preset axis as the center line. The preset axis is the axis of the working tool 200. The plurality of positioning parts 11 are arranged on the support body 10 at intervals with the axis of the working tool 200 as the center line. The extending direction of the guiding gap 112 formed between two adjacent positioning blocks 111 points to the axis of the working tool 200. The plurality of guiding gaps 112 are also formed on the support body 10 at intervals with the axis of the working tool 200 as the center line.

[0048] Due to the uncertainty of the outer contour shape of the flash 301 of the product 300, the direction of the acting force of the working tool 200 in the first direction D1 is constantly changing. When the movable part 20 moves along the first direction D1, at least one positioning part 11 and the corresponding positioning and mating part 22 are separated or remain in a state of partial contact to release the preset posture of the movable part 20. The other positioning parts 11 and the corresponding positioning and mating parts 22 still maintain the positioning and mating state to support the movable part 20 to move along the first direction D1. When the acting force of the working tool 200 in the first direction D1 and the acting forces given by the other positioning parts 11 and the positioning and mating parts 22 to the movable part 20 reach equilibrium, the follower fixture 100 and the working tool 200 remain stationary, so that the working tool 200 can polish the product 300. After the polishing is completed, the acting force of the working tool 200 in the first direction D1 disappears. Under the action of the elastic connecting piece 30, the movable part 20 returns to the preset posture, and a positioning and mating is formed between each positioning part 11 and the corresponding positioning and mating part 22.

[0049] Preferably, three positioning parts 11 and three positioning and mating parts 22 are provided. The three positioning parts 11 are arranged on the support body 10 at intervals with the axis of the working tool 200 as the center line, and the positioning and mating parts 22 are arranged on the movable part 20 with the axis of the working tool 200 as the center line. When the movable part 20 of the present application moves along the first direction D1, there are two moving situations. One situation is that one of the positioning parts 11 and the corresponding positioning and mating part 22 are disengaged from the positioning and mating, and the movable part 20 rotates with the connection line of the remaining two positioning parts 11 as the rotation axis; the other situation is that one of the positioning parts 11 and the corresponding positioning and mating part 22 maintain the positioning and mating, and the movable part 20 rotates with the contact point of the positioning part 11 and the positioning and mating part 22 as the rotation axis. Therefore, at least one positioning part 11 and the corresponding positioning and mating part 22 should maintain the positioning and mating to provide support for the movable part 20 so that the movable part 20 can move along the first direction D1.

[0050] In other implementations, the number of the positioning parts 11 and the positioning and mating parts 22 can be set according to the working range of the working tool 200, and no limitation is made here.

[0051] Further, a first guiding sliding arc surface 113 is formed at the second end of the positioning block 111, and a second guiding sliding arc surface 222 is formed at the second end of the positioned block 221. When the moving member 20 moves along the first direction D1, the second guiding sliding arc surface 222 abuts against the first guiding sliding arc surface 113. Refer to Figure 1 、 Figure 4 and Figure 6 As shown, based on the shape characteristics of the first guiding sliding arc surface 113 and the second guiding sliding arc surface 222, during the process of the moving member 20 moving along the first direction D1, there is a point where the first guiding sliding arc surface 113 and the second guiding sliding arc surface 222 can abut against each other. Furthermore, at least part of the positioning portion 11 abuts against the positioning and cooperating portion 22, so that the moving member 20 can move stably.

[0052] Refer to Figure 1 、 Figure 4 and Figure 5 As shown, the support body 10 includes a first plate body 12 and a second plate body 13 which are oppositely arranged. An installation space 14 is formed between the first plate body 12 and the second plate body 13. The moving member 20 and the elastic connecting member 30 are both located in the installation space 14. The positioning portion 11 is formed on the first plate body 12 and / or the second plate body 13. A plurality of positioning portions 11 can all be arranged on the first plate body 12 or the second plate body 13, or according to the movement of the moving member 20, the plurality of positioning portions 11 can be respectively arranged on the first plate body 12 and the second plate body 13. A positioning and cooperating surface 23 is formed on the side of the moving member 20 facing the positioning portion 11, and the positioning and cooperating portion 22 is arranged at the corresponding position of the positioning and cooperating surface 23 according to the distribution of the positioning portion 11.

[0053] One end of the elastic connecting member 30 is connected to the first plate body 12 or the second plate body 13, and the other end of the elastic connecting member 30 is connected to the moving member 20. The function of the elastic connecting member 30 is on the one hand to connect the support body 10 and the moving member 20, and on the other hand to accumulate elastic force during the process of the moving member 20 moving along the first direction D1. When the acting force in the first direction D1 received by the working tool 200 is less than the threshold value, the accumulated elastic acting force is applied to the moving member 20 to drive the moving member 20 to return and maintain a preset posture. Therefore, one end of the elastic connecting member 30 can be connected to the first plate body 12 or the second plate body 13, and can be selected according to the movement path of the moving member 20 to achieve the foregoing functions.

[0054] In a feasible implementation manner, refer to Figure 1 、 Figure 4 、 Figure 6 and Figure 7As shown, the positioning portion 11 is formed on the side of the first plate body 12 facing the installation space 14. The movable member 20 includes a first split body 24 and a second split body 25 that are coaxially connected. The outer diameter of the first split body 24 is larger than that of the second split body 25. A stepped surface 26 is formed between the first split body 24 and the second split body 25. The stepped surface 26 is formed on the side of the first split body 24 facing the second split body 25. The first split body 24 is closer to the first plate body 12 than the second split body 25. The positioning and mating surface 23 is formed on the side of the first split body 24 away from the second split body 25, and the positioning and mating surface 23 faces the first plate body 12.

[0055] Further, the elastic connecting member 30 includes a spring. The spring is sleeved on the second split body 25. One end of the spring abuts against the stepped surface 26, and the other end of the spring abuts against the second plate body 13. When the movable member 20 moves along the first direction D1, the support body 10 remains stationary. The first split body 24 and the second split body 25 move along the first direction D1 simultaneously, so that an included angle is formed between the axis of the movable member 20 and the axis of the support body 10. As a result, the spring is compressed to store elastic force. This elastic force changes with the change of the acting force in the first direction D1 received by the working tool 200 until it reaches an equilibrium state. After the acting force in the first direction D1 received by the working tool 200 disappears, the elastic force stored in the spring drives the movable member 20 to move in the direction of returning to the preset posture until the axis of the movable member 20 is coaxial with the axis of the support body 10, and the movable member 20 reaches and maintains the preset posture.

[0056] Refer to Figure 5 and Figure 7 As shown, in the embodiment provided by the present application, a first card slot 261 is recessed on the stepped surface 26, and a second card slot 131 is recessed on the side of the second plate body 13 facing the movable member 20. The first card slot 261 and the second card slot 131 are arranged opposite to each other. The opposite ends of the spring are respectively embedded in the first card slot 261 and the second card slot 131. When the movable member 20 moves along the first direction D1, the spring will be compressed to undergo elastic deformation, and the two ends of the spring can respectively extend into the first card slot 261 and the second card slot 131. As a result, the first card slot 261 and the second card slot 131 provide a space for the spring to undergo elastic deformation, which is beneficial to extending the service life of the spring.

[0057] Refer to Figure 1 、 Figure 6 and Figure 7 As shown, the installation portion 21 is an installation groove penetrating through the movable member 20. The working tool 200 is fixed in the installation groove by interference fit, so that the outer peripheral wall of the working tool 200 can closely adhere to the inner wall surface of the installation groove. As a result, when the working tool 200 moves under the action of the acting force in the first direction D1, the movable member 20 can move synchronously.

[0058] To enhance the stability of the support body 10, refer toFigure 4 and Figure 5 As shown, the first plate body 12 and the second plate body 13 are connected by a plurality of connecting rods 15. The plurality of connecting rods 15 are arranged at annular intervals with the axis of the support body 10 as the center line, so that a relatively stable state can be maintained between the first plate body 12 and the second plate body 13. When the moving part 20 moves in the first direction D1 within the installation space 14, under the combined action of the plurality of connecting rods 15, the support body 10 can maintain a stable static state.

[0059] Based on the above embodiments, the working process of the follow-up fixture 100 of the present application is as follows: First, the working tool 200 is fixed within the installation part 21 of the moving part 20, and the grinding part of the working tool 200 is attached to the parting surface of the product 300. If there is a burr 301 on the parting surface of the product 300, the burr 301 will apply a force to the working tool 200 in the first direction D1. When this force is greater than the threshold value, the working tool 200 will move along the first direction D1, and the moving part 20 will move along the first direction D1 accordingly. At least one positioning part 11 and the corresponding positioning and mating part 22 are disengaged from the positioning and mating, thereby releasing the preset posture of the moving part 20. The elastic connecting piece 30 undergoes elastic deformation during the movement of the moving part 20 and stores elastic force. This elastic force causes the working tool 200 to have a tendency to always move towards the parting surface of the product 300, so that the grinding part of the working tool 200 can always be attached to the burr 301, thereby realizing the grinding of burrs 301 with different outer contour shapes. After the grinding is completed, the force received by the working tool 200 decreases, and the elastic force stored in the elastic connecting piece 30 can make the grinding part still attached to the parting surface of the product 300, and drive the moving part 20 to return and maintain the preset posture.

[0060] The structure, features, and effects of the present utility model have been described in detail based on the embodiments shown in the drawings above. The above are only the preferred embodiments of the present utility model, but the present utility model is not limited to the scope shown in the drawings. Any changes made in accordance with the concept of the present utility model, or modified into equivalent embodiments with equivalent changes, still fall within the spirit covered by the specification and the drawings, and should be within the protection scope of the present utility model.

Claims

1. A follow-up fixture, characterized in that, Comprising: A support body provided with a positioning portion; A movable member, at least part of which is received in the support body. The movable member is provided with a mounting portion and a positioning and mating portion. The mounting portion is used for mounting a working tool, and the positioning and mating portion is used for forming a positioning and mating with the positioning portion so that the movable member is maintained in a preset posture. The movable member is used for moving in a first direction when a force along the first direction is applied to the mounting portion. At least part of the positioning and mating portion abuts against the positioning portion, and a preset included angle is formed between the first direction and the axis of the mounting portion; An elastic connecting member respectively connected to the support body and the movable member, and the elastic connecting member is used for driving the movable member to return and be maintained in the preset posture.

2. The follow-up fixture according to claim 1, characterized in that, The positioning portion includes at least two positioning blocks. The first end of the positioning block is connected to the support body, and a guiding gap is formed between two adjacent positioning blocks. The positioning and mating portion includes a positioned block. The first end of the positioned block is connected to the movable member. When the movable member is in the preset posture, the positioned block is in clearance fit with the guiding gap.

3. The follow-up fixture according to claim 2, characterized in that, Both the positioning portion and the positioning and mating portion are provided with a plurality of them. The plurality of positioning portions and the plurality of positioning and mating portions are arranged in one-to-one correspondence. The plurality of positioning portions are arranged at intervals in a ring with a preset axis as the center line, and the extending directions of the guiding gaps all point to the preset axis.

4. The follow-up fixture according to claim 3, characterized in that, Both the positioning portion and the positioning and mating portion are provided with three. The three positioning portions are arranged at intervals in a ring with the preset axis as the center line.

5. The follow-up fixture according to claim 2, characterized in that, The second end of the positioning block forms a first guiding sliding arc surface, and the second end of the positioned block forms a second guiding sliding arc surface. When the movable member moves in the first direction, the second guiding sliding arc surface abuts against the first guiding sliding arc surface.

6. The follow-up fixture according to claim 1, characterized in that The support body includes a first plate body and a second plate body arranged oppositely. An installation space is formed between the first plate body and the second plate body. The movable member and the elastic connecting member are both received in the installation space, wherein: The positioning portion is formed on the first plate body and / or the second plate body. A positioning and mating surface is formed on the side of the movable member facing the positioning portion, and the positioning and mating portion is formed on the positioning and mating surface; One end of the elastic connecting member is connected to the first plate body or the second plate body, and the other end of the elastic connecting member is connected to the movable member.

7. The follow-up fixture according to claim 6, wherein The positioning portion is formed on the side of the first plate body facing the installation space; The movable member includes a first split body and a second split body connected coaxially. The outer diameter of the first split body is larger than that of the second split body, and a step surface is formed between the first split body and the second split body. The positioning and mating surface is formed on the side of the first split body facing away from the second split body; The elastic connecting member includes a spring. The spring is sleeved on the second split body. One end of the spring abuts against the step surface, and the other end of the spring abuts against the second plate body.

8. The follow-up fixture according to claim 7, characterized in that, A first card slot is recessed in the step surface, a second card slot is recessed in a side of the second plate body facing the movable member, one end of the spring is embedded in the first card slot, and the other end of the spring is embedded in the second card slot.

9. The follow-up fixture according to claim 6, wherein The installation portion is an installation groove penetrating through the movable member, the working tool is fixed in the installation groove by interference fit, and a plurality of the positioning and fitting portions are distributed at intervals in the outer circumferential direction of the installation groove.

10. The follow-up fixture according to claim 6, characterized in that, The first plate body and the second plate body are connected by a plurality of connecting rods.

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