Limiting device for preventing mechanical movement

Abstract

The limiting device comprises a fixed base plate, a hydraulic cylinder base is fixed to the top of the fixed base plate through fastening bolts, a fixed base is arranged at the bottom of the fixed base plate, and rectangular grooves are formed in the outer walls of the tops, located on the two sides of the width of the fixed base plate, of the fixed base; a sliding groove is formed in the middle of the rectangular groove, anti-channeling grooves are formed in the positions, in the width direction, of the bottom of the fixed base plate, and L-shaped anti-channeling blocks are arranged below the anti-channeling grooves; parts capable of buffering and unloading force are arranged on the two sides of the bottom of the fixed base plate for mutual cooperation, the position of the extrusion push plate can be adjusted according to the actual impact force through mutual cooperation of the arc-shaped elastic pieces and the buffering springs, and the safe force unloading range under different impact forces is met; the problem that the hydraulic cylinder is extruded and damaged due to the fact that impact force is suddenly too large can be solved, unloading of certain impact force is achieved, and the overall safety of the limiting device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel rolling production, and in particular to a limiting device for preventing mechanical movement. Background Art

[0002] The unwinding machine at the entrance of the HSP production line of the hot rolling mill currently has a set of steel coil centering mechanism, which uses a steel coil centering hydraulic cylinder to drive the gear box to drive the steel coil on the mandrel to move axially to achieve the centering adjustment of the steel strip unwinding. The existing steel coil centering mechanism hydraulic cylinder has a large driving force and is prone to forward and backward movement due to the bolt locking alone, which leads to insufficient precision in steel coil centering adjustment and affects the coil shape. Therefore, during the driving process of the hydraulic cylinder, it needs to be fixed and limited by an external limit device. However, there are still some problems with the existing limit device when it is used:

[0003] 1. Single structure and poor stability. In the process of preventing the hydraulic cylinder base from moving, the existing limit device of the hydraulic cylinder base mostly adopts the method of directly welding the limit block to block and limit the position due to the simple overall structure. However, this structure will cause the limit block to be desoldered, the limit block to be worn and gaps to appear under the impact of long-term steel coil winding, and thus cannot effectively solve the problem of movement for a long time.

[0004] 2. Easy to be squeezed and damaged. The existing limit fixing device of the hydraulic cylinder base, when limiting and fixing the hydraulic cylinder base, mostly adopts the limit method of direct welding for processing. However, the impact force generated by winding steel coils of different sizes is different. When the larger impact force cannot be effectively buffered and unloaded, it will cause damage to the limit device and irreversible stress squeeze damage to the hydraulic cylinder. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a limiting device for preventing mechanical movement.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A limiting device for preventing mechanical movement, comprising a fixed base plate, a hydraulic cylinder base is fixed to the top of the fixed base plate by fastening bolts, and a fixed base is arranged at the bottom of the fixed base plate, rectangular grooves are opened on the top outer walls of the fixed base plate on both sides of the width, and a sliding groove is opened in the middle of the rectangular groove, anti-movement grooves are opened at the bottom of the fixed base plate in the width direction, and an L-shaped anti-movement block is arranged below the anti-movement groove, and buffer springs are welded at both ends of the back of the L-shaped anti-movement block;

[0008] The fixed base is located on the middle outer wall of both sides of the length and is provided with symmetrically distributed L-shaped grooves, and the inner wall of the L-shaped groove is slidably inserted with a T-shaped slider, the outer wall of the T-shaped slider is welded with a support rod, and the top outer wall of the support rod is welded with a wedge block, an adjustment guide groove is opened on the fixed base plate in the middle of the two wedge blocks, and the inner wall of the adjustment guide groove is slidably installed with an adjustment block, the top outer wall of the adjustment block is welded with a trapezoidal limit block, and the middle of the adjustment block is screwed with an adjustment screw.

[0009] As a further solution of the present invention: an extrusion push plate is slidably inserted into the inner wall of the sliding groove, and an adjusting screw is screwed on the bottom of the extrusion push plate, and a worm gear is welded to the outer wall of the adjusting screw.

[0010] As a further solution of the present invention: a worm is meshed on the outer wall of the bottom of the worm wheel, and a rotating shaft is welded at the axis of the worm, the outer wall of the rotating shaft is rotatably set on a connecting block, and the connecting block is provided with positioning holes distributed at equal distances around the rotating shaft.

[0011] As a further solution of the present invention: the inner wall of the positioning hole is welded with a rotating sleeve having a positioning rod, and the inner wall of the rotating sleeve is welded with an anti-skid block, and the outer wall of the rotating shaft is provided with an anti-skid groove, and the anti-skid groove is adapted to the anti-skid block.

[0012] As a further solution of the present invention: a first arc-shaped spring piece is welded to the middle outer wall of the L-shaped anti-slip block, and a second arc-shaped spring piece is welded to the middle outer wall of the extrusion push plate close to the L-shaped anti-slip block, and the first arc-shaped spring piece and the second arc-shaped spring piece squeeze each other.

[0013] As a further solution of the present invention: both ends of the T-shaped sliding block are penetrated with fixed holes, and the inner walls of the fixed holes are plugged and installed with fixed pins.

[0014] As a further solution of the present invention: a first threaded waist hole is penetrated through the outer wall of one side of the two wedge blocks that are relatively close to each other, and a second threaded waist hole is penetrated through the outer walls at both ends of the trapezoidal limit block, the inner wall size of the first threaded waist hole is consistent with the inner wall size of the second threaded waist hole, and the inner walls of the first threaded waist hole and the second threaded waist hole are screwed with a fastening screw.

[0015] As a further solution of the present invention: the inner walls of the two wedge blocks on opposite sides are provided with mutually parallel limiting grooves, and the outer walls on both sides of the trapezoidal limiting blocks are welded with mutually parallel limiting sliding blocks, and the limiting grooves and limiting sliding blocks are adapted to each other.

[0016] As a further solution of the present invention: silicone anti-collision pads are bonded to the outer walls of both sides of the trapezoidal limit block along the inclined surface, and the spacing between the wedge block and the trapezoidal limit block is adapted to the thickness of the silicone anti-collision pads.

[0017] Compared with the prior art, the present invention provides a limiting device for preventing mechanical movement, which has the following beneficial effects:

[0018] 1. The limit device for preventing mechanical movement of the present invention can effectively block the hydraulic cylinder base by the mutual cooperation of the wedge block and the trapezoidal limit block, and can achieve fine adjustment of the gap by adjusting the forward and backward movement of the trapezoidal limit block according to actual needs in reality, so as to meet the use of different needs and greatly improve the practicality of the limit device.

[0019] 2. The limit device designed to prevent mechanical movement has a limit groove and a limit slider that cooperate with each other on the relative outer walls of the trapezoidal limit block and the wedge-shaped block. When an external impact force is generated, it can ensure that the trapezoidal limit block can achieve guided adjustment of the moving length, thereby avoiding damage caused by excessive extrusion pressure. In addition, the contact surface between the trapezoidal limit block and the wedge-shaped block is provided with a silicone anti-collision pad for soft contact protection, which can provide a certain degree of protection.

[0020] 3. The limit device for preventing mechanical movement of the present design is designed to cooperate with each other by arranging components that can buffer and unload force on both sides of the bottom of the fixed base plate. By utilizing the cooperation between the arc-shaped spring piece and the buffer spring, the position of the extrusion push plate can be adjusted according to the actual impact force to meet the safe unloading range under different impact forces. It can reduce the problem of hydraulic cylinder extrusion damage caused by sudden excessive impact force, achieve unloading of a certain impact force, and improve the overall safety of the limit device.

[0021] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a limiting device for preventing mechanical movement proposed by the present invention;

[0023] Figure 2 A side view of the overall structure of a limiting device for preventing mechanical movement proposed by the present invention;

[0024] Figure 3 A top view of the overall structure of a limiting device for preventing mechanical movement proposed by the present invention;

[0025] Figure 4 This is a front view of the overall structure of a limiting device for preventing mechanical movement proposed by the present invention;

[0026] Figure 5 This is a schematic diagram of the disassembled structure of a limiting device for preventing mechanical movement proposed by the present invention;

[0027] Figure 6This is a schematic structural diagram from a first perspective of a limiting device for preventing mechanical movement proposed by the present invention.

[0028] In the figure: 1, fixed base plate; 2, fastening bolts; 3, hydraulic cylinder base; 4, fixed base; 5, rectangular groove; 6, sliding groove; 7, L-shaped anti-slip block; 8, buffer spring; 9, first arc spring piece; 10, second arc spring piece; 11, adjusting screw; 12, worm gear; 13, worm; 14, rotating shaft; 15, connecting block; 16, positioning socket; 17, positioning plug rod; 18, rotating sleeve; 19, L-shaped Slide groove; 20, T-shaped slider; 21, anti-slip groove; 22, support rod; 23, wedge block; 24, fixed socket; 25, fixed pin; 26, limit slide groove; 27, first threaded waist hole; 28, adjustment guide groove; 29, adjustment block; 30, trapezoidal limit block; 31, adjustment screw; 32, second threaded waist hole; 33, tightening screw; 34, limit slider; 35, silicone anti-collision pad; 36, extrusion push plate. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Embodiment 1:

[0031] A limiting device for preventing mechanical movement, in this embodiment, as Figure 1-6 As shown, it includes a fixed base plate 1, a hydraulic cylinder base 3 is fixed to the top of the fixed base plate 1 by a fastening bolt 2, and a fixed base 4 is arranged at the bottom of the fixed base plate 1, and a rectangular groove 5 is opened on the top outer wall of the fixed base plate 4 on both sides of the width of the fixed base plate 1, and a sliding groove 6 is opened in the middle of the rectangular groove 5, and an anti-channeling groove 21 is opened at the bottom of the fixed base plate 1 in the width direction, and an L-shaped anti-channeling block 7 is arranged below the anti-channeling groove 21, and buffer springs 8 are welded at both ends of the back of the L-shaped anti-channeling block 7;

[0032] The inner wall of the sliding groove 6 is slidably plugged with an extrusion push plate 36, and the bottom of the extrusion push plate 36 is screwed with an adjusting screw 11, the outer wall of the adjusting screw 11 is welded with a worm wheel 12, the outer wall of the bottom of the worm wheel 12 is meshed with a worm 13, and a rotating shaft 14 is welded at the axis of the worm 13, the outer wall of the rotating shaft 14 is rotatably set on a connecting block 15, and the connecting block 15 is located around the rotating shaft 14 and has positioning holes 16 distributed at equal distances;

[0033] The inner wall of the positioning socket 16 is welded with a rotating sleeve 18 of a positioning rod 17, and the inner wall of the rotating sleeve 18 is welded with an anti-skid block, the outer wall of the rotating shaft 14 is provided with an anti-skid groove, and the anti-skid groove is adapted to the anti-skid block, the middle outer wall of the L-shaped anti-channeling block 7 is welded with a first arc-shaped spring piece 9, and the extrusion push plate 36 is welded with a second arc-shaped spring piece 10 near the middle outer wall of the L-shaped anti-channeling block 7, and the first arc-shaped spring piece 9 and the second arc-shaped spring piece 10 are mutually squeezed;

[0034] The wedge block 23 and the trapezoidal limit block 30 cooperate with each other to limit the hydraulic cylinder base 3, so that the limit blocking process can be effectively performed, and according to the actual needs in reality, the trapezoidal limit block 30 is adjusted to move forward and backward to achieve fine adjustment of the gap, so as to meet the use of different needs and greatly improve the practicality of the limit device;

[0035] The fixed base 4 has symmetrically distributed L-shaped slots 19 on the outer wall in the middle of both sides of the length, and the inner wall of the L-shaped slot 19 is slidably inserted with a T-shaped slider 20, the outer wall of the T-shaped slider 20 is welded with a support rod 22, and the top outer wall of the support rod 22 is welded with a wedge block 23, and the outer walls of both sides of the trapezoidal limit block 30 are bonded with silicone anti-collision pads 35 along the inclined surface;

[0036] The spacing between the wedge block 23 and the trapezoidal limit block 30 is adapted to the thickness of the silicone anti-collision pad 35. Both ends of the T-shaped slider 20 are penetrated with fixed sockets 24, and the inner wall of the fixed socket 24 is plugged with a fixed pin 25. An adjustment guide groove 28 is opened on the fixed base plate 1 in the middle of the two wedge blocks 23, and an adjustment block 29 is slidably installed on the inner wall of the adjustment guide groove 28. The top outer wall of the adjustment block 29 is welded with a trapezoidal limit block 30, and the middle of the adjustment block 29 is screwed with an adjustment screw 31;

[0037] A first threaded waist hole 27 is formed through the outer wall of the relatively close side of the two wedge blocks 23, and second threaded waist holes 32 are formed through the outer walls of both ends of the trapezoidal limit block 30. The inner wall size of the first threaded waist hole 27 is consistent with the inner wall size of the second threaded waist hole 32, and the inner walls of the first threaded waist hole 27 and the second threaded waist hole 32 are screwed with a fastening screw 33. The inner walls of the opposite sides of the two wedge blocks 23 are formed with mutually parallel limit grooves 26, and mutually parallel limit sliders 34 are welded to the outer walls of both sides of the trapezoidal limit block 30, and the limit grooves 26 and the limit sliders 34 are adapted to each other.

[0038] When this embodiment is used, .

[0039] Embodiment 2:

[0040] A limiting device to prevent mechanical movement, such as Figure 1-6As shown, this embodiment makes the following supplements on the basis of embodiment 1: it includes a fixed base plate 1, the top of the fixed base plate 1 is fixed with a hydraulic cylinder base 3 by a fastening bolt 2, and the bottom of the fixed base plate 1 is provided with a fixed base 4, the top outer wall of the fixed base 4 on both sides of the width of the fixed base plate 1 is provided with a rectangular groove 5, and the middle position of the rectangular groove 5 is provided with a sliding groove 6, the bottom of the fixed base plate 1 is provided with an anti-slip groove 21 in the width direction, and an L-shaped anti-slip block 7 is provided below the anti-slip groove 21, and buffer springs 8 are welded to both ends of the back of the L-shaped anti-slip block 7;

[0041] The inner wall of the sliding groove 6 is slidably plugged with an extrusion push plate 36, and the bottom of the extrusion push plate 36 is screwed with an adjusting screw 11, the outer wall of the adjusting screw 11 is welded with a worm wheel 12, the outer wall of the bottom of the worm wheel 12 is meshed with a worm 13, and a rotating shaft 14 is welded at the axis of the worm 13, the outer wall of the rotating shaft 14 is rotatably set on a connecting block 15, and the connecting block 15 is located around the rotating shaft 14 and has positioning holes 16 distributed at equal distances;

[0042] The relative outer walls of the trapezoidal limit block 30 and the wedge block 23 are provided with a limit slot 26 and a limit slider 34, so that when an external impact force is generated, the trapezoidal limit block 30 can be guided and adjusted in length, thereby avoiding damage caused by excessive squeezing force. In addition, the contact surface between the trapezoidal limit block 30 and the wedge block 23 is provided with a silicone anti-collision pad 35 for soft contact protection, thereby providing a certain degree of protection.

[0043] The inner wall of the positioning socket 16 is welded with a rotating sleeve 18 of a positioning rod 17, and the inner wall of the rotating sleeve 18 is welded with an anti-skid block, the outer wall of the rotating shaft 14 is provided with an anti-skid groove, and the anti-skid groove is adapted to the anti-skid block, the middle outer wall of the L-shaped anti-channeling block 7 is welded with a first arc-shaped spring piece 9, and the extrusion push plate 36 is welded with a second arc-shaped spring piece 10 near the middle outer wall of the L-shaped anti-channeling block 7, and the first arc-shaped spring piece 9 and the second arc-shaped spring piece 10 are mutually squeezed;

[0044] The fixed base 4 has symmetrically distributed L-shaped slots 19 on the outer wall in the middle of both sides of the length, and the inner wall of the L-shaped slot 19 is slidably inserted with a T-shaped slider 20, the outer wall of the T-shaped slider 20 is welded with a support rod 22, and the top outer wall of the support rod 22 is welded with a wedge block 23, and the outer walls of both sides of the trapezoidal limit block 30 are bonded with silicone anti-collision pads 35 along the inclined surface;

[0045] The spacing between the wedge block 23 and the trapezoidal limit block 30 is adapted to the thickness of the silicone anti-collision pad 35. Both ends of the T-shaped slider 20 are penetrated with fixed sockets 24, and the inner wall of the fixed socket 24 is plugged with a fixed pin 25. An adjustment guide groove 28 is opened on the fixed base plate 1 in the middle of the two wedge blocks 23, and an adjustment block 29 is slidably installed on the inner wall of the adjustment guide groove 28. The top outer wall of the adjustment block 29 is welded with a trapezoidal limit block 30, and the middle of the adjustment block 29 is screwed with an adjustment screw 31;

[0046] By arranging components capable of buffering and unloading force on both sides of the bottom of the fixed base plate 1 to cooperate with each other, and utilizing the cooperation between the arc-shaped spring piece and the buffer spring 8, the position of the extrusion push plate can be adjusted according to the actual impact force, so as to meet the safe unloading range under different impact forces, and the problem of hydraulic cylinder extrusion damage caused by sudden excessive impact force can be reduced, so as to achieve unloading force of a certain impact force and improve the overall safety of the limit device;

[0047] A first threaded waist hole 27 is formed through the outer wall of the side close to each other of the two wedge blocks 23, and second threaded waist holes 32 are formed through the outer walls of both ends of the trapezoidal limiting block 30. The inner wall size of the first threaded waist hole 27 is consistent with the inner wall size of the second threaded waist hole 32, and the inner walls of the first threaded waist hole 27 and the second threaded waist hole 32 are screwed with a fastening screw 33. The inner walls of the two wedge blocks 23 on the opposite side are formed with mutually parallel limiting grooves 26, and mutually parallel limiting sliders 34 are welded to the outer walls of both sides of the trapezoidal limiting block 30, and the limiting grooves 26 and the limiting sliders 34 are adapted to each other.

[0048] When using this embodiment, first place the fixed base plate 1 on the top of the fixed base 4, and use the fastening bolts 2 to fix the hydraulic cylinder base 3, then place the L-shaped anti-slip block 7 inside the rectangular groove, and install the first arc spring piece 9 and the second arc spring piece 10 between the L-shaped anti-slip block 7 and the extrusion push plate 36. After that, rotate the adjusting screw 31, use the adjusting screw 31 to drive the trapezoidal limit block 30 to slide to the farthest distance, and then slide the wedge block 23 welded with the T-shaped slider 20 into the L-shaped slide groove 19. After the wall is moved to the bottom, the fixing pin 25 is inserted into the fixing hole 24 to fix the T-shaped slider 20. After that, the trapezoidal limit block 30 is slid to a suitable range to squeeze and limit the movement of the two wedge blocks 23. The two wedge blocks 23 are tightly attached to the bottom of the hydraulic cylinder base 3 to limit the bottom of the hydraulic cylinder. After the processing, the adjusting screw 31 is screwed into the first threaded waist hole 27 and the second threaded waist hole 32 to reinforce the space between the trapezoidal limit block 30 and the wedge block 23.

[0049] In actual use, when the hydraulic cylinder of the steel coil centering mechanism is prone to forward and backward movement due to the large driving force and the hydraulic cylinder is only locked by bolts, when the hydraulic cylinder base 3 is about to move, it will squeeze the middle wedge block 23, and since there is a trapezoidal limit block 30 between the wedge blocks 23, a limit clamping process will be achieved. The continuous application of impact force will make the trapezoidal limit block 30 slide along the position of the limit slide groove 26 for force unloading, and a silicone anti-collision pad 35 is provided between the trapezoidal limit block 30 and the wedge block 23 to provide a certain soft protection. When the external impact force is suddenly too large, the wedge blocks 23 on both sides will be deformed due to excessive force, so that the fixed base plate 1 will follow the impact force. The fixed base plate 1 is slidably mounted on the bottom of the fixed base plate 1, and since two mutually extruding first and second arc-shaped spring pieces 9 and 10 are arranged, the elastic potential energy of the mutual extrusion between the two will offset the kinetic energy of the impact, and with the buffering treatment of the compression spring 8, it is possible to achieve rapid force unloading and reduce the displacement caused by the impact, which can have a certain protective effect on the hydraulic cylinder. After the force unloading is completed, the first and second arc-shaped spring pieces 9 and 10 will be reset, thereby pushing the fixed base plate 1 to its original position. Since the moving gap is small, the force unloading can be achieved, and the corresponding second protective limit function can be achieved. The double limit and force unloading protection can also be provided, thereby improving the safety of the overall use of the device.

[0050] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A limiting device for preventing mechanical movement, comprising a fixed base plate (1), characterized in that: A hydraulic cylinder base (3) is fixed to the top of the fixed base plate (1) by means of a fastening bolt (2), and a fixed base (4) is arranged at the bottom of the fixed base plate (1), and rectangular grooves (5) are provided on the top outer walls of the fixed base plate (4) on both sides of the width of the fixed base plate (1), and a sliding groove (6) is provided in the middle of the rectangular groove (5), and an anti-slip groove (21) is provided at the bottom of the fixed base plate (1) in the width direction, and an L-shaped anti-slip block (7) is arranged below the anti-slip groove (21), and buffer springs (8) are welded to both ends of the back of the L-shaped anti-slip block (7); The fixed base (4) is provided with symmetrically distributed L-shaped sliding grooves (19) on the middle outer walls of both sides of the length, and a T-shaped sliding block (20) is slidably inserted into the inner wall of the L-shaped sliding groove (19), a support rod (22) is welded to the outer wall of the T-shaped sliding block (20), and a wedge block (23) is welded to the top outer wall of the support rod (22), an adjustment guide groove (28) is provided on the fixed base plate (1) in the middle of the two wedge blocks (23), and an adjustment block (29) is slidably installed on the inner wall of the adjustment guide groove (28), a trapezoidal limit block (30) is welded to the top outer wall of the adjustment block (29), and an adjustment screw (31) is screwed in the middle of the adjustment block (29).

2. A limiting device for preventing mechanical movement according to claim 1, characterized in that: An extrusion push plate (36) is slidably inserted into the inner wall of the sliding groove (6), and an adjusting screw rod (11) is screwed to the bottom of the extrusion push plate (36), and a worm gear (12) is welded to the outer wall of the adjusting screw rod (11).

3. A limiting device for preventing mechanical movement according to claim 2, characterized in that: A worm (13) is meshed with the outer wall at the bottom of the worm wheel (12), and a rotating shaft (14) is welded at the axis of the worm (13). The outer wall of the rotating shaft (14) is rotatably arranged on a connecting block (15), and the connecting block (15) is provided with positioning sockets (16) distributed at equal distances around the rotating shaft (14).

4. A limiting device for preventing mechanical movement according to claim 3, characterized in that: The inner wall of the positioning socket (16) is welded with a rotating sleeve (18) having a positioning rod (17), and the inner wall of the rotating sleeve (18) is welded with an anti-skid block, and the outer wall of the rotating shaft (14) is provided with an anti-skid groove, which is matched with the anti-skid block.

5. A limiting device for preventing mechanical movement according to claim 4, characterized in that: A first arc-shaped spring piece (9) is welded to the middle outer wall of the L-shaped anti-slip block (7), and a second arc-shaped spring piece (10) is welded to the middle outer wall of the extrusion push plate (36) close to the L-shaped anti-slip block (7), and the first arc-shaped spring piece (9) and the second arc-shaped spring piece (10) are mutually extruded.

6. A limiting device for preventing mechanical movement according to claim 1, characterized in that: Both ends of the T-shaped slide block (20) are penetrated with fixed insertion holes (24), and the inner wall of the fixed insertion hole (24) is plugged with a fixed plug pin (25).

7. A limiting device for preventing mechanical movement according to claim 1, characterized in that: A first threaded waist hole (27) is formed through the outer wall of one side of the two wedge blocks (23) that are relatively close to each other, and a second threaded waist hole (32) is formed through the outer wall of both ends of the trapezoidal limit block (30), the inner wall size of the first threaded waist hole (27) is consistent with the inner wall size of the second threaded waist hole (32), and a fastening screw (33) is screwed to the inner wall of the first threaded waist hole (27) and the second threaded waist hole (32).

8. A limiting device for preventing mechanical movement according to claim 1, characterized in that: The inner walls of the two wedge-shaped blocks (23) on opposite sides are provided with mutually parallel limiting sliding grooves (26), and the outer walls on both sides of the trapezoidal limiting block (30) are welded with mutually parallel limiting sliding blocks (34), and the limiting sliding grooves (26) and the limiting sliding blocks (34) are adapted to each other.

9. A limiting device for preventing mechanical movement according to claim 8, characterized in that: Silicone anti-collision pads (35) are bonded to the outer walls of both sides of the trapezoidal limiting block (30) along the inclined surfaces, and the spacing between the wedge block (23) and the trapezoidal limiting block (30) is adapted to the thickness of the silicone anti-collision pads (35).

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