A part fixing device for a turning and milling combined machining center

Abstract

The application relates to a fixing device, in particular to a part fixing device for a turning and milling combined machining center, which comprises a chuck body and a fixing base arranged at the bottom end of the chuck body, and equidistantly arranged chuck claws on the chuck body; wherein the chuck claws are connected with a clamping auxiliary mechanism, and the clamping ends of the chuck claws are connected with a cleaning assembly; before clamping and fixing the cylindrical parts through the chuck claws, the clamping auxiliary mechanism is used for auxiliary clamping, that is, the driving screw is used for driving the carrier until the clamping strips at one end of the carrier extend outward, then the clamping and positioning assembly is used for fixing the carrier, finally the chuck claws are used for driving the clamping strips at the end of the carrier to clamp and fix the cylindrical parts, and the rust on the clamping surface of the clamping strips can be cleaned through the cleaning assembly, so that the operation is convenient, the clamping work is stable, and the machining quality is improved.

Description

Technical Field

[0001] This invention relates to a fixing device, and more particularly to a part fixing device for a milling and turning machining center. Background Technology

[0002] A Chinese patent document with publication number CN219986904U discloses a part fixture for a mill-turn machining center. The fixture includes a CNC device, a horizontal moving mechanism, a lifting moving mechanism, a drive device, and a chuck. The lifting moving mechanism is mounted on the horizontal moving mechanism, and the drive device is mounted on the lifting moving mechanism. The output end of the drive device is fixedly connected to the chuck. The CNC device is electrically connected to the drive device, the horizontal moving mechanism, and the lifting moving mechanism. This design uses the CNC device to control the lifting moving mechanism, thereby adjusting the height of the drive device and the chuck mounted on the lifting moving mechanism.

[0003] Existing workpiece clamping fixtures typically use jaws on a chuck for clamping. During the machining process, some workpiece blanks have rust residue on their surface. On the one hand, the rust residue on the blank can cause the clamping to loosen; on the other hand, the rust residue can adhere to the clamping surface of the workpiece, affecting subsequent clamping operations. It is necessary to clean it in advance, otherwise it will affect the product clamping operation and damage the product itself. Therefore, existing workpiece clamping devices lack suitable clamping auxiliary components to meet their working requirements and need to be improved and optimized.

[0004] To address these issues, this invention proposes a part fixing device for a milling and turning machining center. Summary of the Invention

[0005] The purpose of this invention is to provide a part fixing device for a milling and turning machining center to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a part fixing device for a milling and turning machining center, comprising a chuck body and a fixing base disposed at the bottom end of the chuck body, wherein jaws are equidistantly arranged on the chuck body;

[0007] The gripper clamps the cylindrical component, the gripper is connected to the clamping auxiliary mechanism, and the gripping end of the gripper is connected to the cleaning component.

[0008] Preferably, the clamping auxiliary mechanism includes a receiving cavity, which is disposed in the chuck, and a mounting groove is provided at one end of the receiving cavity. A carrier is movably disposed in the receiving cavity, and an auxiliary bearing is embedded at one end of the carrier. The auxiliary bearing is also sleeved at one end of a drive screw. The other end of the drive screw extends to the outside of the carrier and is fixedly provided with a handle at its end. Clamping strips are fixedly provided at equal intervals at the other end of the carrier.

[0009] Preferably, the ends of the bottom row of clamping strips, which are equidistantly arranged, are provided with connecting threaded cavities, which are connected to the clamping support assembly.

[0010] Preferably, the carrier is positioned by a clamping and positioning component, and a cleaning component is connected to the mounting groove.

[0011] Preferably, the cleaning component includes a mounting plate that is fitted into a mounting groove and fixed by screws. The mounting plate has square grooves evenly spaced on it, and a connector is fixedly provided on the inner sidewall of the square groove.

[0012] Preferably, the square groove and the clamping strip are positioned correspondingly and have the same number of sets; the connecting body is provided with a circular groove, and the inner sidewall of the circular groove is provided with cleaning brushes at equal intervals in a ring shape, and the end of the cleaning brush is provided with inclined bristles.

[0013] Preferably, the clamping and positioning assembly includes a positioning auxiliary slot and a threaded through slot. The positioning auxiliary slot is evenly distributed on the upper surface of the carrier. The threaded through slot is disposed in the jaw, and the top opening of the threaded through slot is provided with a receiving groove. The threaded through slot and the fastening threaded post are threadedly connected to each other. A knob block is fixedly disposed at one end of the fastening threaded post, and a rubber pad is fixedly disposed on the end face of the other end of the fastening threaded post. Positioning auxiliary clamps are fixedly disposed at equal intervals on the bottom end face of the rubber pad. The positioning auxiliary clamps are configured as conical heads.

[0014] Preferably, the clamping support assembly includes a support shaft, one end of which is fixedly provided with a connecting thread head, the connecting thread head being threadedly connected to the connecting thread cavity, a fixed limiting plate being fixedly provided on the support shaft, and an internal thread fastening sleeve being threadedly connected to the support shaft, one end of which is fixedly provided with a limiting pressure ring.

[0015] Preferably, a support auxiliary structure is sleeved on the support shaft body, wherein the support auxiliary structure includes a first docking body, a through hole is provided through the center of the first docking body, and first loading grooves are provided at equal intervals at the edge of the docking end of the first docking body. The docking end of the first docking body is symmetrically provided with docking thread grooves. The center of the second docking body is also provided with a through hole, and second loading grooves are provided at equal intervals at the edge of the docking end of the second docking body. Cylindrical through grooves are symmetrically provided in the second docking body, and the second docking body and the first docking body are connected and fixed by docking screws.

[0016] Preferably, the first docking body and the second docking body are docked to form a support disk, and the support disk is sleeved on the support shaft. The first loading slot cavity and the second loading slot cavity are positioned correspondingly and have the same number of sets. They are docked to form a placement cavity, and an auxiliary ball is placed in the placement cavity. One auxiliary ball is placed in each placement cavity.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] This invention relates to a part fixing device for a mill-turn machining center, comprising a chuck body and a fixed base at the bottom of the chuck body. The chuck body has equidistantly spaced jaws. The jaws are connected to a clamping auxiliary mechanism, and the clamping ends of the jaws are connected to a cleaning component. A cylindrical part is placed on the chuck body. Before clamping the cylindrical part with the jaws, the clamping auxiliary mechanism assists in clamping it. Specifically, a drive screw pushes a carrier until the clamping strip at one end of the carrier extends outward. Then, the clamping and positioning component fixes the carrier. Finally, the jaws drive the clamping strip at the end of the carrier to clamp and fix the cylindrical part. During this process, if the sidewall of the cylindrical part has rust, the clamping action of the clamping strip prevents the rust from adhering to the clamping surface of the jaws. Rust residue on the clamping surface of the clamping bar can be cleaned using the provided cleaning component. This method is convenient, provides stable clamping, and effectively improves processing quality. Specifically, rotating the drive screw via the handle pushes and pulls the carrier body. During clamping, the drive screw pushes the carrier body outwards, causing the clamping bar at its end to move outwards until it is exposed. For cylindrical parts with rust residue on their surface, rust residue may adhere to the clamping surface after clamping. To avoid affecting subsequent clamping operations, or when replacing parts where the replacement part is rust-free, the rust residue adhering to the end face of the clamping bar can cause damage. Therefore, timely cleaning is necessary. This solution utilizes the provided cleaning component to achieve this cleaning. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structural connection of the part fixing chuck device of the present invention;

[0020] Figure 2 This is a schematic diagram showing the connection between the claw and the clamping auxiliary mechanism of the present invention;

[0021] Figure 3 for Figure 2 Enlarged schematic diagram of the structural connection at point A;

[0022] Figure 4 This is a schematic diagram of the internal structure connection of the claw of the present invention;

[0023] Figure 5 for Figure 4 Enlarged schematic diagram of the structural connection at point B;

[0024] Figure 6 This is a schematic diagram showing the connection between the clamping auxiliary mechanism and the cleaning component structure of the present invention;

[0025] Figure 7 for Figure 6 Enlarged schematic diagram of the structural connection at point C;

[0026] Figure 8 This is a schematic diagram of the cleaning component structure connection of the present invention;

[0027] Figure 9 for Figure 8 Enlarged schematic diagram of the structural connection at point D;

[0028] Figure 10 This is a schematic diagram of the fastening threaded column structure connection in the clamping and positioning assembly of the present invention;

[0029] Figure 11 This is a schematic diagram of the right side of the clamping and support component structure of the present invention;

[0030] Figure 12 This is a schematic diagram of the left side of the clamping and support component structure of the present invention;

[0031] Figure 13 This is a schematic diagram of the right side of the explosion-proof connection of the supporting auxiliary structure of the present invention;

[0032] Figure 14 This is a schematic diagram of the left side of the explosion-proof connection of the supporting auxiliary structure of the present invention.

[0033] In the diagram: 1. Chuck body; 11. Chuck claw; 2. Fixed base; 3. Cylindrical component; 401. Receiving cavity; 402. Bearing body; 403. Auxiliary bearing; 404. Drive screw; 405. Handle; 406. Clamping strip; 407. Mounting groove; 408. Connecting threaded cavity; 501. Mounting plate; 502. Square groove; 503. Connector; 504. Cleaning brush body; 505. Inclined bristles; 601. Positioning auxiliary slot; 602. Threaded through groove; 603. Receiving groove; 604. Fastening threaded post; 605. Knob block; 606. Rubber pad; 607. Positioning auxiliary chuck; 701. Support shaft; 702. Connecting threaded head; 703. Fixed limit plate; 704. Internal threaded fastening sleeve; 705. Limiting pressure ring; 801. First mating body; 802. Second mating body; 803. First loading cavity; 804. Second loading cavity; 805. Auxiliary ball; 806. Mating screw; 807. Through hole. Detailed Implementation

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0035] Example 1: Please refer to Figures 1-14 A part fixing device for a milling and turning machining center includes a chuck body 1 and a fixed base 2 disposed at the bottom of the chuck body 1. The chuck body 1 is provided with jaws 11 at equal intervals. The jaws 11 clamp cylindrical parts 3. The jaws 11 are connected to a clamping auxiliary mechanism. The clamping end of the jaws 11 is connected to a cleaning component.

[0036] The cylindrical component 3 is placed on the chuck body 1. Before clamping and fixing the cylindrical component 3 with the jaws 11, it is clamped by a clamping auxiliary mechanism. That is, the drive screw 404 pushes the carrier 402 until the clamping strip 406 at one end of the carrier 402 extends outward. Then, the clamping and positioning component fixes the carrier 402. Finally, the jaws 11 drive the clamping strip 406 at the end of the carrier 402 to clamp and fix the cylindrical component 3. During this process, if there is rust on the side wall of the cylindrical component 3, the clamping action of the clamping strip 406 can prevent the rust from adhering to the clamping surface of the jaws 11. The rust on the clamping surface of the clamping strip 406 can be cleaned by the cleaning component.

[0037] The clamping auxiliary mechanism includes a receiving cavity 401, a carrier 402, an auxiliary bearing 403, a drive screw 404, a handle 405, a clamping bar 406, a mounting groove 407, and a connecting threaded cavity 408. The receiving cavity 401 is disposed in the jaw 11, and the mounting groove 407 is provided at one end of the receiving cavity 401. The carrier 402 is movably disposed in the receiving cavity 401. The auxiliary bearing 403 is embedded at one end of the carrier 402. The auxiliary bearing 403 is also sleeved on one end of the drive screw 404. The other end of the drive screw 404 extends to the outside of the carrier 402, and the handle 405 is fixedly provided at the end. The other end is fixedly provided with clamping strips 406 at equal intervals; the ends of the bottom row of clamping strips 406 are provided with connecting threaded cavities 408, which are connected to the clamping support assembly; the carrier 402 is positioned by the clamping and positioning assembly, and a cleaning assembly is connected in the mounting groove 407; in this solution, the drive screw 404 is rotated by the handle 405, so that the drive screw 404 pushes and pulls the carrier 402. When clamping, the drive screw 404 pushes the carrier 402 outward, so that the clamping strips 406 at the end of the carrier 402 are moved outward, so that the clamping strips 406 are exposed.

[0038] To further improve the clamping stability when clamping the cylindrical component 3, this solution uses a clamping and positioning assembly to further secure the position of the carrier 402. This assembly includes a positioning auxiliary slot 601, a threaded through slot 602, a receiving groove 603, a fastening threaded post 604, a knob block 605, a rubber pad 606, and a positioning auxiliary chuck head 607. The positioning auxiliary slot 601 is evenly distributed on the upper surface of the carrier 402. The threaded through slot 602 is located in the chuck 11, and the top opening of the threaded through slot 602 is provided with a receiving groove 603. The threaded through slot 602 and the fastening threaded post 604 are threadedly connected and matched. A knob block 605 is fixedly mounted on one end of the fastening threaded post 604, and a knob block 605 is fixedly mounted on the end face of the other end of the fastening threaded post 604. A rubber pad 606 is provided, and positioning auxiliary clamps 607 are fixedly arranged at equal intervals on the bottom end face of the rubber pad 606. The positioning auxiliary clamps 607 are set as conical heads. After the carrier 402 is adjusted, the fastening threaded post 604 is tightened by the knob block 605, so that the bottom end of the fastening threaded post 604 squeezes the carrier 402. The positioning auxiliary grooves 601 are evenly arranged on the carrier 402 to cooperate with the rubber pad 606 at the bottom end of the fastening threaded post 604. The bottom end of the rubber pad 606 is also provided with positioning auxiliary clamps 607, so that the positioning auxiliary clamps 607 and the corresponding positioning auxiliary grooves 601 are pressed and locked, further improving the stability of the carrier 402, and thus further improving the clamping stability of the clamping strip 406 on the cylindrical component 3.

[0039] For cylindrical parts 3 with rust on their surface, after clamping and processing by clamping bar 406, rust may adhere to the clamping surface of clamping bar 406. To avoid affecting subsequent clamping operations, or when replacing parts where the replaced part has no rust, the rust adhering to the end face of clamping bar 406 will cause some damage to the new part. Therefore, timely cleaning is necessary. This solution achieves cleaning through a cleaning component, which includes mounting plate 501, square groove 502, and connector 503. The cleaning brush body 504 and the inclined bristles 505 are fitted into the mounting plate 501 and fixed in the mounting groove 407. The mounting plate 501 is fixed with screws. The mounting plate 501 has square grooves 502 at equal intervals. The inner side wall of the square grooves 502 is fixed with a connector 503. The square grooves 502 and the clamping strips 406 are positioned correspondingly and have the same number of sets. The connector 503 has a circular groove, and the inner side wall of the circular groove is equidistantly arranged in a ring with the cleaning brush body 504. The end of the cleaning brush body 504 is provided with inclined bristles 505.

[0040] After processing, first rotate the handle 405 in the opposite direction to pull back the carrier 402 via the drive screw 404, thereby retracting the clamping strip 406 at the end of the carrier 402. During this process, the clamping strip 406 passes through the circular groove in the connecting body 503, and the cleaning brush 504 in the circular groove has a certain cleaning effect on the side wall of the clamping strip 406. After the clamping strip 406 is fully retracted, the end face of the clamping strip 406 will contact the inclined bristles 505 at the end of the cleaning brush 504, which has a cleaning effect on the rust residue on the end face of the clamping strip 406. The corresponding cleaning action minimizes the residue of rust on the end face of the clamping strip 406. Furthermore, when the clamping strip 406 needs to be pushed out for clamping work, the drive screw 404 pushes the carrier 402 outward again, causing the clamping strip 406 to pass through the circular groove in the connecting body 503 again. At this time, the end of the clamping strip 406 will first come into contact with the inclined bristles 505 and the cleaning brush body 504, cleaning the end of the clamping strip 406 again, improving its cleaning efficiency, ensuring the stability of its clamping work, and preventing rust from damaging the workpiece.

[0041] The cleaning components are designed to be detachable for easy replacement and maintenance. The mounting plate 501 is inserted into the mounting groove 407 and secured with screws. The connector 503 in the square groove 502 can be fixed by welding or adhesive. After removing the mounting plate 501, the cleaning brush 504 and the inclined bristles 505 can be cleaned and maintained, or the mounting plate 501 can be replaced entirely.

[0042] In actual processing, for the parts to be processed, due to the different locations requiring processing, it may be necessary to place pads on the chuck body 1 to meet the height position of the parts after they are clamped by the jaws 11. That is, the exposed position of the parts needs to meet the processing requirements, and to avoid the jaws 11 obstructing the processing position after clamping the parts. Therefore, the present invention also provides a clamping support assembly to meet the actual processing requirements. The clamping support assembly includes a support shaft 701, a connecting threaded head 702, a fixed limiting plate 703, and an internal thread fastening sleeve 704. 04. A limiting pressure ring 705 and a support auxiliary structure are provided. One end of the support shaft 701 is fixedly provided with a connecting thread head 702, which is threadedly connected to the connecting thread cavity 408. A fixed limiting disc 703 is fixedly provided on the support shaft 701. An internal thread fastening sleeve 704 is threadedly connected to the support shaft 701, and a limiting pressure ring 705 is fixedly provided at one end of the internal thread fastening sleeve 704. A support auxiliary structure is sleeved on the support shaft 701, which includes a first mating body 801 and a second mating body 80. 2. A first loading cavity 803, a second loading cavity 804, an auxiliary ball bearing 805, a mating screw 806, and a through hole 807. A through hole 807 is provided through the center of the first mating body 801, and the first loading cavities 803 are equidistantly arranged at the edges of the mating ends of the first mating body 801. Symmetrical mating thread grooves are provided on the mating ends of the first mating body 801. A through hole 807 is also provided through the center of the second mating body 802, and the second loading cavities 804 are equidistantly arranged at the edges of the mating ends of the second mating body 802. The two docking bodies 802 are symmetrically provided with cylindrical through grooves, and the second docking body 802 and the first docking body 801 are connected and fixed by docking screws 806; the first docking body 801 and the second docking body 802 are docked to form a support plate, and the support plate is sleeved on the support shaft 701. The first loading cavity 803 and the second loading cavity 804 are positioned correspondingly and have the same number of sets, and are docked to form a placement cavity, and an auxiliary ball bearing 805 is placed in the placement cavity, with one auxiliary ball bearing 805 placed in each placement cavity.

[0043] According to the actual clamping processing requirements, a clamping support assembly is connected to the bottom row of clamping strips 406 on the end face of the carrier 402. That is, the clamping support assembly is set according to the actual situation, and one or more sets can be set. The connecting thread head 702 at one end of the support shaft 701 is threadedly connected to the connecting thread cavity 408 on the end face of the clamping strip 406. The support plate set on the support shaft 701 supports the bottom end of the workpiece to be processed, and auxiliary balls 805 are equidistantly set on the support plate. The purpose is that if the position of the workpiece needs to be supported and adjusted during the clamping and stabilization process, the auxiliary balls 805 can provide a rolling action to avoid friction damage to the bottom end of the workpiece.

[0044] The number of support discs fitted onto the support shaft 701 and the diameter of the support discs need to be selected according to actual needs. After fitting multiple support discs onto the support shaft 701, each support disc is first brought into close contact. One side of the support disc is limited by a fixed limiting disc 703, and the other side of the support disc is pressed and limited by a limiting pressure ring 705. That is, the internal thread fastening sleeve 704 is threadedly connected to the support shaft 701 until the limiting pressure ring 705 at one end of the internal thread fastening sleeve 704 comes into close contact with the support disc. For the support disc formed by the docking of the first docking body 801 and the second docking body 802, different diameters can be selected to meet the support requirements, providing better working flexibility. If the clamping support assembly is not needed, disassembly is also very convenient. Simply rotate the support shaft 701 to release the connection between the connecting thread head 702 at one end of the support shaft 701 and the connecting thread cavity 408 at the end of the clamping strip 406.

[0045] The support plate is designed with splicing. The first docking body 801 and the second docking body 802 are connected and fixed by docking screws 806. The auxiliary ball bearing 805 set in the support plate can also be easily removed for replacement or maintenance. After separating the first docking body 801 and the second docking body 802, the auxiliary ball bearing 805 can be directly removed from the loading slot cavity, which is convenient to operate.

[0046] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A part fixing device for a turning and milling combined machining center, comprising a chuck body (1) and a fixing base (2) arranged at the bottom end of the chuck body (1), and a jaw (11) is arranged equidistantly on the chuck body (1); characterized in that The jaw (11) clamps a cylindrical part (3), the jaw (11) is connected with a clamping auxiliary mechanism, and the clamping end of the jaw (11) is connected with a cleaning assembly; The clamping auxiliary mechanism comprises a containing cavity (401), the containing cavity (401) is arranged in the jaw (11), one end of the containing cavity (401) is provided with a mounting groove (407), a carrier (402) is movably arranged in the containing cavity (401), one end of the carrier (402) is embeddedly connected with an auxiliary bearing (403), the auxiliary bearing (403) is also sleeved on one end of a drive screw (404), the other end of the drive screw (404) extends to the outside of the carrier (402), and a handle (405) is fixedly arranged at the end; the other end of the carrier (402) is equidistantly fixedly provided with a clamping strip (406); The end of the equidistantly arranged bottom row of clamping strips (406) is provided with a connecting threaded cavity (408), and the connecting threaded cavity (408) is connected with a clamping support assembly; The cleaning assembly comprises a mounting plate (501), the mounting plate (501) is adapted to be clamped in the mounting groove (407), and the mounting plate (501) is fixed by screws; a square groove (502) is equidistantly arranged in the mounting plate (501), and a connecting body (503) is fixedly arranged on the inner side wall of the square groove (502); The square groove (502) and the clamping strip (406) are arranged in corresponding positions and have the same number of groups; a circular groove is arranged in the connecting body (503), and cleaning brush bodies (504) are equidistantly and annularly arranged on the inner side wall of the circular groove; and inclined bristles (505) are arranged at the end of the cleaning brush body (504); The clamping support assembly comprises a support shaft body (701), one end of the support shaft body (701) is fixedly provided with a connecting threaded head (702), the connecting threaded head (702) is threadedly connected with the connecting threaded cavity (408), a fixed limiting disc (703) is fixedly arranged on the support shaft body (701), an internally threaded fastening sleeve (704) is threadedly connected on the support shaft body (701), and a limiting pressure ring (705) is fixedly arranged at one end of the internally threaded fastening sleeve (704). The support shaft body (701) is sleeved with a support auxiliary structure, wherein the support auxiliary structure comprises a first butt joint body (801) and a second butt joint body (802), the central position of the first butt joint body (801) is provided with a through hole (807), the edge position of the butt joint end of the first butt joint body (801) is provided with a first loading slot cavity (803) at equal intervals, the butt joint end of the first butt joint body (801) is symmetrically provided with a butt joint threaded groove, the central position of the second butt joint body (802) is also provided with a through hole (807), the edge position of the butt joint end of the second butt joint body (802) is provided with a second loading slot cavity (804) at equal intervals, the second butt joint body (802) is symmetrically provided with a cylindrical through slot, and the second butt joint body (802) and the first butt joint body (801) are connected and fixed by a butt joint screw (806); The first butt joint body (801) and the second butt joint body (802) are butt jointed to form a support disc body, the support disc body is sleeved on the support shaft body (701), the first loading slot cavity (803) and the second loading slot cavity (804) are provided at corresponding positions and have the same number of groups, and the two are butt jointed to form a placing cavity, and the placing cavity contains an auxiliary ball (805), and one of the placing cavities contains one auxiliary ball (805).

2. The part fixture for a turn-milling center as set forth in claim 1, wherein: The carrier (402) is positioned by a clamping positioning assembly, and a cleaning assembly is connected and arranged in the mounting slot body (407).

3. The part fixture for a turn-milling center as set forth in claim 2, wherein: The clamping positioning assembly comprises a positioning auxiliary clamping groove (601) and a threaded through slot (602), the positioning auxiliary clamping groove (601) is uniformly arranged on the upper end face of the carrier (402), the threaded through slot (602) is arranged in the clamping jaw (11), and the top slot of the threaded through slot (602) is provided with a containing slot body (603), the threaded through slot (602) and the fastening threaded column (604) are adaptively and threadedly connected, one end of the fastening threaded column (604) is fixedly provided with a knob block (605), the end face of the other end of the fastening threaded column (604) is fixedly provided with a rubber pad body (606), the bottom end face of the rubber pad body (606) is fixedly provided with a positioning auxiliary clamping head (607) at equal intervals, and the positioning auxiliary clamping head (607) is provided in a conical shape.

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