CN115008234B - Fixing device for processing annular parts - Google Patents

Abstract

The invention discloses a fixing device for processing an annular part, relates to the technical field of lathe processing, and comprises a device body, wherein the surface of the device body is fixedly connected with lathe tool equipment. This a fixing device for annular parts machining, the oil pump carries hydraulic oil to the sliding cylinder in, the plunger rod is driven by the outside extension of axis, the surface of block rubber and the surperficial in close contact with of annular part, three block rubber realizes the location to annular part, afterwards, the slip table is at the surperficial slip of the device body, make annular part to the motion of magnetic ball, magnetic ball and electro-magnet mutual contact, connecting rod and gangbar atress are crooked, the flexible component is buckled and the medial surface in close contact with of annular part, thereby carry out the centre gripping with the medial surface of annular part, lathe tool equipment carries out the turning with the cutter centre gripping to the surface of annular part, how to carry out the problem of centre gripping when having solved the cylinder of the nonmagnetic annular part of turning.

Description

A fixing device for machining ring parts

technical field

The invention relates to the technical field of lathe machining, in particular to a fixing device for machining annular parts.

Background technique

A lathe is a machine tool that mainly uses a turning tool to turn a rotating workpiece. A lathe is the most important type of cutting machine tool in metal cutting machine tools. In general machine manufacturing factories, lathes are the largest number, also known as the mother machine. , On the lathe, drills, reaming drills, reamers, taps, dies and knurling tools can also be used for corresponding processing. The function of the lathe is to rotate and cut the surfaces of workpieces of different sizes and shapes. With the vigorous development of technology and manufacturing, the shape and structure of mechanical parts are becoming more and more complex, and the requirements for machining accuracy are also getting higher and higher. Machining refers to the process of changing the size or performance of a workpiece through a mechanical device, thereby It is suitable for various needs in practice. In actual operation, when turning ring parts, it is necessary to clamp ring parts of different sizes and diameters. The existing fixing devices for processing ring parts mainly have the following shortcomings, such as:

How to clamp when turning the cylindrical surface of non-magnetic annular parts, and how to clamp and deform thin-walled annular parts due to excessive local force during the clamping process.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the present invention provides a fixing device for the processing of annular parts, which solves the problem of how to clamp the cylindrical surface of non-magnetic annular parts, and how to clamp and process thin-walled annular parts easily. The problem of deformation due to excessive local force.

In order to achieve the above purpose, the present invention is achieved through the following technical solutions: a fixing device for processing annular parts, comprising a device body, the surface of the device body is fixedly connected with turning tool equipment, and the inner side of the device body is provided with Limiting mechanism, the surface of the device body is slidably connected with a positioning mechanism, the limiting mechanism includes a rotating body, the surface of the rotating body is rotatably connected with the inner side of the device body, and the surface of the rotating body is provided with a tooth surface , the surface of the rotating body is fixedly connected with a first damping hinge, the surface of the first damping hinge is rotatably connected with a connecting rod, and one end of the connecting rod away from the first damping hinge is rotatably connected with a flexible component, the flexible component It includes a second damping hinge, the second damping hinge is rotatably connected with the surface of the connecting rod, and the surface of the second damping hinge is rotatably connected with a linkage rod.

The inner side of the device body is fixedly connected with driving equipment, the upper position of the surface of the device body is fixedly connected with a protective cover, the middle position of the surface of the rotating body is fixedly connected with a connecting column, and the oil pump delivers hydraulic oil to the sliding cylinder, The plunger rod is driven to expand outward from the axis, the surface of the rubber block is in close contact with the surface of the ring part, and the three rubber blocks position the ring part. Movement, the magnetic ball and the electromagnet are in contact with each other, the connecting rod and the linkage rod are bent under force, and the flexible component is bent and in close contact with the inner side of the ring part, so as to clamp the inner side of the ring part, and the turning tool clamps the tool Turning the surface of annular parts solves the problem of how to clamp when turning the cylindrical surface of non-magnetic annular parts.

The output end of the driving device is engaged with the rotating body through the tooth surface, and the end of the linkage rod away from the second damping hinge is fixedly connected with a magnetic ball, and the magnetic ball has magnetism.

The surface of the magnetic ball is fixedly connected with an elastic wall, the elastic wall is made of rubber material, the inner side of the rubber wall is fixedly connected with an elastic strip, and the surface of the rotating body is fixedly connected with an expansion component. When driven to slide on the surface of the device body, the magnetic ball cooperates with the hemispherical surface of the electromagnet surface, the electromagnet is energized, the magnetic ball is attracted, and the elastic wall on the surface of the magnetic ball makes the linkage rod rotate, the magnetic ball will not be attracted by the magnetic force. It is easy to fall off the surface of the electromagnet. When the ring part is clamped by the rubber block and the rubber wall, the device is driven to make the rotating body rotate, and the rotating wall is connected to the mechanism wall through the bearing. Rotation so that the cylindrical surface of the annular part is machined.

An expansion component is fixedly connected to the surface of the rotating body, the expansion component includes a spring, an elastic strip is fixedly connected to the inner side of the rubber wall, a fixed pin is fixedly connected to the surface of the second damping hinge, and the surface of the fixed pin is fixedly connected. A rubber wall is fixedly connected to drive the equipment to rotate the rotating body through the meshing between the tooth surfaces. A spring is fixedly connected to the middle of the opposite surface of the connecting column and the connecting rod. The elastic force of the spring is opposite to the resistance direction of the first damping hinge. When the magnetic ball and the electromagnet are stressed, the connecting rod and the linkage rod are bent, and the resistance of the first damping hinge overcomes the elastic force of the spring to rotate, so that the flexible component can clamp the annular part. After the processing, the elastic force of the spring makes the connecting rod reset. The surface of the connecting rod and the rotating body is made to be in a vertical state again, which is convenient for the subsequent clamping process.

The positioning mechanism includes a sliding table, the surface of the sliding table is slidably connected with the surface of the device body, the top of the sliding table is fixedly connected with a mechanism wall, and the inner side of the mechanism wall is fixedly connected with a bearing.

The inner side surface of the bearing is fixedly connected with a rotating wall, one end of the rotating wall extends to the outside of the mechanism wall, and the side of the rotating wall surface away from the mechanism wall is fixedly connected with an adjustment component.

The adjustment assembly includes a disc body, the disc body is fixedly connected to the side of the surface of the rotating wall away from the mechanism wall, the surface of the disc body is fixedly connected with an electromagnet, the surface of the electromagnet is provided with a hemispherical surface, and the electromagnet is connected to the surface. When the magnetic ball is in contact, the sliding table continues to slide toward the rotating body, the bending force overcomes the resistance of the spring, and the force of the second damping hinge is unbalanced, causing the connecting rod and the linkage rod to bend, and the ring part limited by the rubber block is driven. When it is close to the rubber wall, the inner side of the ring part is in close contact with the surface of the rubber wall to achieve clamping. The force realizes flexible clamping of the ring parts, avoiding the problem that the thin-walled ring parts are easily deformed due to excessive local force in the process of clamping and processing the thin-walled ring parts.

An adjustment cylinder is fixedly connected to the inner side of the rotating wall, a matching component is fixedly connected to the end of the adjustment cylinder away from the rotating wall, an oil pump is fixedly connected to the inner side of the adjustment cylinder, and the adjustment cylinder and the rotating wall are fixedly connected , In this device, for ring parts with different diameters, the positional relationship between the adjustment cylinder and the rotating wall can be controlled, the adjustment cylinder extends outward and then is fixed with the rotating wall, and the sliding cylinder controls the rubber block to the ring parts. After the three-point limit is achieved, the second damping hinge makes the linkage rod bend, and the ring parts with smaller diameters can be clamped. Similarly, the adjustment cylinder extends inward and is fixed with the rotating wall, which can adjust the diameter of the ring. Large ring parts are clamped, making the device more adaptable.

A sliding cylinder is fixedly connected to one end of the adjusting cylinder away from the rotating wall, a plunger rod is slidably connected to the inner side of the sliding cylinder, and a rubber block is fixedly connected to the surface of the plunger rod.

The present invention provides a fixing device for machining annular parts. Has the following beneficial effects:

1. This fixing device for the processing of annular parts, in this device, the oil pump delivers hydraulic oil to the sliding cylinder, the plunger rod is driven to expand outward from the axis, the surface of the rubber block is in close contact with the surface of the annular part, and the three The rubber block realizes the positioning of the ring part, and then, the sliding table slides on the surface of the device body, so that the ring part moves toward the magnetic ball, the magnetic ball and the electromagnet contact each other, the connecting rod and the linkage rod are bent under force, and the flexible component is bent and the ring The inner side of the part is in close contact, so that the inner side of the ring part is clamped, and the turning tool clamps the tool to turn the surface of the ring part, which solves the problem of how to clamp the cylindrical surface of the non-magnetic ring part. .

2. The fixing device used for the processing of ring parts drives the equipment to rotate the rotating body through the meshing between the tooth surfaces. A spring is fixedly connected between the connecting column and the opposite surface of the connecting rod. The elastic force of the spring is connected to the first damping hinge. When the magnetic ball and the electromagnet are stressed, the connecting rod and the linkage rod are bent, and the resistance of the first damping hinge overcomes the elastic force of the spring to rotate, so that the flexible component can clamp the ring part. The elastic force resets the connecting rod, so that the surface of the connecting rod and the rotating body is in a vertical state again, which is convenient for the subsequent clamping process.

3. In this fixing device for ring-shaped parts processing, when the electromagnet is in contact with the magnetic ball, the sliding table continues to slide toward the rotating body, the bending force overcomes the resistance of the spring, and the force of the second damping hinge is unbalanced, which makes the connecting rod and the linkage When the rod is bent and the ring part limited by the rubber block is moved to a position close to the rubber wall, the inner side of the ring part is in close contact with the surface of the rubber wall to achieve clamping, and the bending between the rods makes the ring part Under the stable clamping rigidity, the elastic strip and the elastic force of the rubber wall realize flexible clamping of the ring parts, avoiding the problem that the thin-walled ring parts are easily deformed due to excessive local force in the process of clamping and processing.

4. In this fixing device for processing annular parts, when the sliding table is driven to slide on the surface of the device body, the magnetic ball matches the hemispherical surface of the electromagnet surface, and the electromagnet is energized to attract the magnetic ball, and the elasticity of the surface of the magnetic ball When the wall makes the linkage rod rotate, the magnetic ball is not easy to fall off the surface of the electromagnet under the attraction of the magnetic force. When the ring part is clamped by the rubber block and the rubber wall, the equipment is driven to make the rotating body rotate, and the rotating wall passes through the bearing and the mechanism wall. Rotating connection, the turning tool drives the turning tool to move, and the annular part is driven to rotate, so that the cylindrical surface of the annular part is processed.

5. The fixing device for the processing of annular parts has a fixed connection between the adjustment cylinder and the rotating wall. In this device, for annular parts with different diameters, the positional relationship between the adjustment cylinder and the rotating wall can be controlled. The adjusting cylinder extends outward and is then fixed with the rotating wall. After the sliding cylinder controls the rubber block to realize the three-point limit of the ring part, the second damping hinge makes the linkage rod bend, and the ring part with smaller diameter can be adjusted. Clamping, in the same way, the adjusting cylinder is extended inward and then fixed with the rotating wall, which can clamp the ring parts with larger diameters, so that the adaptability of the device is wider.

Description of drawings

Fig. 1 is the overall structural representation of the present invention;

Fig. 2 is the structural representation inside the present invention;

Fig. 3 is the structural schematic diagram of the limiting mechanism of the present invention;

4 is a schematic structural diagram of an extension assembly of the present invention;

5 is a schematic structural diagram of the flexible assembly of the present invention;

6 is a schematic structural diagram of a positioning mechanism of the present invention;

7 is a schematic structural diagram of an adjustment assembly of the present invention;

FIG. 8 is a schematic diagram of the structure of the mating component of the present invention.

In the figure: 1, device body; 2, turning tool equipment; 3, protective cover; 4, limit mechanism; 41, driving equipment; 42, connecting column; 43, rotating body; 44, tooth surface; 45, extension assembly; 451, first damping hinge; 452, connecting rod; 453, linkage rod; 454, magnetic ball; 455, spring; 46, flexible component; 461, second damping hinge; 462, fixing pin; 463, rubber wall; 464, Elastic strip; 5, positioning mechanism; 51, sliding table; 52, mechanism wall; 53, bearing; 54, rotating wall; 55, adjusting component; 551, disc body; 552, adjusting cylinder; 553, electromagnet; 554, hemisphere face; 56, matching components; 561, oil pump; 562, sliding cylinder; 563, plunger rod; 564, rubber block.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

As shown in FIGS. 1-8 , the present invention provides a technical solution: a fixing device for processing annular parts, comprising a device body 1 , a turning tool equipment 2 , a protective cover 3 , a limit mechanism 4 , and a positioning mechanism 5 , the limiting mechanism 4 includes a driving device 41, a connecting column 42, a rotating body 43, a tooth surface 44, an expansion assembly 45 and a flexible assembly 46, and the positioning mechanism 5 includes a sliding table 51, a mechanism wall 52, a bearing 53, a rotating wall 54, an adjustment The component 55 and the matching component 56, the expansion component 45 includes a first damping hinge 451, a connecting rod 452, a linkage rod 453, a magnetic ball 454, a spring 455, and the flexible component 46 includes a second damping hinge 461, a fixing pin 462, a rubber wall 463, The elastic strip 464, the adjustment assembly 55 includes a disc body 551, an adjustment cylinder 552, an electromagnet 553, and a hemisphere 554, and the matching assembly 56 includes an oil pump 561, a sliding cylinder 562, a plunger rod 563, and a rubber block 564.

The surface of the device body 1 is fixedly connected with the turning tool equipment 2, the upper position of the surface of the device body 1 is fixedly connected with a protective cover 3, the inner side of the device body 1 is provided with a limiting mechanism 4, and the surface of the device body 1 is slidably connected with a positioning mechanism 5 , the surface of the magnetic ball 454 is fixedly connected with an elastic wall, the elastic wall is made of rubber material, the surface of the second damping hinge 461 is fixedly connected with a fixing pin 462, the surface of the fixing pin 462 is fixedly connected with a rubber wall 463, the first damping hinge A connecting rod 452 is rotatably connected to the surface of the connecting rod 451, and the flexible component 46 is rotatably connected to the end of the connecting rod 452 away from the first damping hinge 451. A linkage rod 453 is connected, the surface of the sliding table 51 is slidably connected with the surface of the device body 1, the top of the sliding table 51 is fixedly connected with a mechanism wall 52, the inner side of the mechanism wall 52 is fixedly connected with a bearing 53, and the surface of the rotating wall 54 is away from the mechanism One side of the wall 52 is fixedly connected with a disk body 551, the surface of the disk body 551 is fixedly connected with an electromagnet 553, the surface of the electromagnet 553 is provided with a hemispherical surface 554, the inner side of the adjustment cylinder 552 is fixedly connected with an oil pump 561, and the adjustment cylinder 552 is far away from A sliding cylinder 562 is fixedly connected to one end of the rotating wall 54 , a plunger rod 563 is slidably connected to the inner side of the sliding cylinder 562 , and a rubber block 564 is fixedly connected to the surface of the plunger rod 563 .

When in use, in the device, the oil pump 561 delivers hydraulic oil to the sliding cylinder 562, the plunger rod 563 is driven to expand outward from the axis, the surface of the rubber block 564 is in close contact with the surface of the annular part, and the three rubber blocks 564 The parts are positioned, and then, the sliding table 51 slides on the surface of the device body 1, so that the ring-shaped parts move toward the magnetic ball 454, the magnetic ball 454 and the electromagnet 553 are in contact with each other, the connecting rod 452 and the linkage rod 453 are bent under force, and the magnetic ball 454 The elastic wall on the surface is in close contact with the peripheral position of the surface of the electromagnet 553 at this time. When the magnetic ball 454 is driven to rotate, the elastic wall can prevent the magnetic ball 454 from being separated from the surface of the electromagnet 553 when it rotates, and the flexible component 46 is bent and the annular The inner side of the part is in close contact, so that the inner side of the ring part is clamped, and the turning tool 2 clamps the tool to turn the surface of the ring part, which solves the problem of how to clamp the cylindrical surface of the non-magnetic ring part. question.

As shown in FIGS. 3-5 , a driving device 41 is fixedly connected to the inner side of the device body 1 , and the output end of the driving device 41 is engaged with the rotating body 43 through the tooth surface 44 , and the linkage rod 453 is away from the end of the second damping hinge 461 . The magnetic ball 454 is fixedly connected, the magnetic ball 454 has magnetism, the surface of the magnetic ball 454 is fixedly connected with an elastic wall, and the elastic wall is made of rubber material, and the surface of the second damping hinge 461 is fixedly connected with a fixing pin 462. A rubber wall 463 is fixedly connected to the surface, a connecting column 42 is fixedly connected to the middle position of the surface of the rotating body 43, a spring 455 is fixedly connected to the middle position of the opposite surface of the connecting column 42 and the connecting rod 452, and the inner side of the rubber wall 463 is fixedly connected to elastic Bar 464, the surface of the rotating body 43 is fixedly connected with the expansion assembly 45, the surface of the sliding table 51 is slidably connected with the surface of the device body 1, the surface of the disc body 551 is fixedly connected with the electromagnet 553, and the surface of the plunger rod 563 is fixedly connected with rubber Block 564, the surface of the rotating body 43 is rotatably connected with the inner side of the device body 1, the surface of the rotating body 43 is provided with the tooth surface 44, the surface of the rotating body 43 is fixedly connected with the first damping hinge 451, and the surface of the first damping hinge 451 A connecting rod 452 is rotatably connected to the connecting rod 452 , and the flexible component 46 is rotatably connected to the end of the connecting rod 452 away from the first damping hinge 451 . Rod 453.

When in use, the driving device 41 rotates the rotating body 43 through the engagement between the tooth surfaces 44, and a spring 455 is fixedly connected to the middle position of the opposite surface of the connecting column 42 and the connecting rod 452. The resistance direction is opposite, when the magnetic ball 454 and the electromagnet 553 are stressed, the connecting rod 452 and the linkage rod 453 are bent, and the resistance of the first damping hinge 451 overcomes the elastic force of the spring 455 to rotate, so that the flexible component 46 can clamp the ring part After the processing, the elastic force of the spring 455 makes the connecting rod 452 reset, so that the connecting rod 452 and the surface of the rotating body 43 are in a vertical state again, which is convenient for the subsequent clamping process. When the electromagnet 553 is in contact with the magnetic ball 454, the sliding table 51 Continue to slide to the rotating body 43, the bending force overcomes the spring resistance, the second damping hinge 461 is unbalanced, so that the connecting rod 452 and the linkage rod 453 are bent, and the ring part limited by the rubber block 564 is driven to close When the rubber wall 463 is in the position, the inner side of the ring part is in close contact with the surface of the rubber wall 463 to achieve clamping, and the bending between the rods makes the ring part receive a firm clamping rigidity. The elastic force of the thin-walled ring parts realizes flexible clamping of the ring parts, avoiding the problem that the thin-walled ring parts are easily deformed due to excessive local force during the clamping and processing of the thin-walled ring parts.

As shown in FIGS. 6-8 , the surface of the rotating body 43 is rotatably connected to the inner side of the device body 1 , the inner side of the device body 1 is fixedly connected with the driving device 41 , and one end of the linkage rod 453 away from the second damping hinge 461 is fixedly connected There is a magnetic ball 454, a rubber wall 463 is fixedly connected to the surface of the fixing pin 462, a mechanism wall 52 is fixedly connected to the top of the sliding table 51, a bearing 53 is fixedly connected to the inner side of the mechanism wall 52, and the inner side of the bearing 53 is fixedly connected to rotate. The wall 54, the inner side of the rotating wall 54 is fixedly connected with an adjustment cylinder 552, the end of the adjustment cylinder 552 away from the rotating wall 54 is fixedly connected with a sliding cylinder 562, and the inner side of the sliding cylinder 562 is slidably connected with a plunger rod 563, the plunger rod 563 A rubber block 564 is fixedly connected to the surface of the adjusting cylinder 552, a matching assembly 56 is fixedly connected to one end of the adjusting cylinder 552 away from the rotating wall 54, an oil pump 561 is fixedly connected to the inner side of the adjusting cylinder 552, and one end of the rotating wall 54 extends to the outside of the mechanism wall 52, The side of the surface of the rotating wall 54 away from the mechanism wall 52 is fixedly connected with the adjustment assembly 55, the side of the surface of the rotating wall 54 away from the mechanism wall 52 is fixedly connected with a disk body 551, and the surface of the disk body 551 is fixedly connected with an electromagnet 553, and the electromagnet 553 The surface is provided with a hemispherical surface 554 .

In use, when the sliding table 51 is driven to slide on the surface of the device body 1, the magnetic ball 454 cooperates with the hemispherical surface 554 on the surface of the electromagnet 553, and the electromagnet 553 is energized so that the magnetic ball 454 is attracted, and the elasticity of the surface of the magnetic ball 454 When the wall makes the linkage rod 453 rotate, the magnetic ball 454 is not easy to fall off the surface of the electromagnet 553 under the attraction of the magnetic force. The rotating wall 54 is rotatably connected with the mechanism wall 52 through the bearing 53, the turning tool 2 drives the turning tool to move, and the annular part is driven to rotate, so that the cylindrical surface of the annular part is processed, and the adjusting cylinder 552 and the rotating wall 54 are fixedly connected , in this device, for ring parts of different sizes, the positional relationship between the adjustment cylinder 552 and the rotating wall 54 can be controlled, the adjustment cylinder 552 extends outward and then is fixed with the rotating wall 54, controlled by the sliding cylinder 562 After the rubber block 564 realizes the three-point limit on the ring part, the second damping hinge 461 makes the linkage rod 453 bend, so that the ring part with a smaller diameter can be clamped. The rotating wall 54 is fixed, which can clamp the ring parts with larger diameters, so that the adaptability of the device is wider.

It should be noted that, in this document, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. without more restrictions. An element defined by the phrase "comprising an... does not preclude the presence of additional identical elements in a process, method, article or apparatus comprising said element".

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

Claims (1)

1. A fixing device for annular parts machining, includes the device body (1), its characterized in that: the turning tool device is characterized in that turning tool equipment (2) is fixedly connected to the surface of the device body (1), a limiting mechanism (4) is arranged on the inner side surface of the device body (1), a positioning mechanism (5) is connected to the surface of the device body (1) in a sliding mode, the limiting mechanism (4) comprises a rotating body (43), the surface of the rotating body (43) is rotatably connected with the inner side surface of the device body (1), a tooth surface (44) is arranged on the surface of the rotating body (43), a first damping hinge (451) is fixedly connected to the surface of the rotating body (43), a connecting rod (452) is rotatably connected to the surface of the first damping hinge (451), a second damping hinge (461) is rotatably connected to one end, away from the first damping hinge (451), of the connecting rod (452), and a linkage rod (453) is rotatably connected to the surface of the second damping hinge (461);

the inner side surface of the device body (1) is fixedly connected with a driving device (41), the upper position of the surface of the device body (1) is fixedly connected with a protective cover (3), and the middle position of the surface of the rotating body (43) is fixedly connected with a connecting column (42);

the output end of the driving device (41) is meshed with the rotating body (43) through a tooth surface (44), one end, far away from the second damping hinge (461), of the linkage rod (453) is fixedly connected with a magnetic ball (454), and the magnetic ball (454) has magnetism;

an elastic wall is fixedly connected to the surface of the magnetic ball (454), the elastic wall is made of rubber, a fixing pin (462) is fixedly connected to the surface of the second damping hinge (461), and a rubber wall (463) is fixedly connected to the surface of the fixing pin (462);

a spring (455) is fixedly connected to the middle position of the opposite surface of the connecting column (42) and the connecting rod (452), and an elastic strip (464) is fixedly connected to the inner side surface of the rubber wall (463);

the positioning mechanism (5) comprises a sliding table (51), the surface of the sliding table (51) is in sliding connection with the surface of the device body (1), the top of the sliding table (51) is fixedly connected with a mechanism wall (52), and the inner side surface of the mechanism wall (52) is fixedly connected with a bearing (53);

a rotating wall (54) is fixedly connected to the inner side surface of the bearing (53), and one end of the rotating wall (54) extends to the outside of the mechanism wall (52);

a disc body (551) is fixedly connected to one side, away from the mechanism wall (52), of the surface of the rotating wall (54), an electromagnet (553) is fixedly connected to the surface of the disc body (551), and a hemispherical surface (554) is arranged on the surface of the electromagnet (553);

an adjusting cylinder (552) is fixedly connected to the inner side surface of the rotating wall (54), and an oil pump (561) is fixedly connected to the inner side surface of the adjusting cylinder (552);

one end, far away from the rotating wall (54), of the adjusting cylinder (552) is fixedly connected with a sliding cylinder (562), the inner side face of the sliding cylinder (562) is connected with a plunger rod (563) in a sliding mode, and the surface of the plunger rod (563) is fixedly connected with a rubber block (564).

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