Anti-breaking clutch for push rod of packaging machine

Abstract

The utility model discloses a packing machine push rod anti-breaking clutch which comprises an outer shell, a shell cover is hinged to the top of the outer shell, a driving shaft and a driven shaft are rotationally connected to the two sides of the inner wall of the outer shell through bearings respectively, and the packing machine push rod anti-breaking clutch further comprises an anti-breaking mechanism which is arranged in the outer shell. And the adjusting mechanism is arranged outside the anti-breaking mechanism. The utility model relates to the technical field of non-woven fabric processing equipment, in particular to an anti-breaking clutch for a push rod of a packaging machine, which prevents the push rod from being broken due to overload through the matching of a first clutch plate, a second clutch plate, a ball, a first spring, a cross rod, a mounting part and a limiting part, and solves the problem that the push rod of the packaging machine cannot be broken due to overload in the process of pushing packaged non-woven fabric to move. The problems that a push rod may encounter various resistances due to product clamping or mechanical faults, and due to the fact that a traditional packing machine push rod and a power device are generally in rigid connection, the push rod cannot automatically release torque, and the push rod is prone to breakage are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to non - woven fabric processing equipment technical field, concretely is packing machine push rod anti - break clutch. BACKGROUND

[0002] When non - woven fabric is packed, packing machine is needed, and the push rod is a key component in the working process of the packing machine, which pushes the packaged product from one station to another station.

[0003] When the packing machine push rod is used, the push rod is connected with the external driving device, and then the driving device drives the push rod to move, so as to push the packaged non - woven fabric to move.

[0004] When the packing machine push rod pushes the packaged non - woven fabric to move, the push rod may be blocked by the product or encounter various resistances due to mechanical failure, and since the traditional packing machine push rod and the power device are usually rigidly connected, when overload occurs, the push rod cannot automatically release the torque, and the push rod is prone to breakage. UTILITY MODEL CONTENTS

[0005] In view of the defects of the prior art, the utility model provides a packing machine push rod anti - break clutch, which solves the problem that the packing machine push rod is prone to breakage when pushing the packaged non - woven fabric to move.

[0006] To achieve the above object, the utility model is realized by the following technical scheme: the packing machine push rod anti - break clutch comprises a shell, a shell cover is hinged to the top of the shell, a driving shaft and a driven shaft are rotatably connected to the inner wall of the shell on both sides respectively, the packing machine push rod anti - break clutch further comprises a break - proof mechanism, and the break - proof mechanism is arranged in the shell; an adjusting mechanism is arranged outside the break - proof mechanism; wherein the break - proof mechanism protects the push rod from breaking under overload, and the adjusting mechanism adjusts the elastic force of the parts in the break - proof mechanism.

[0007] Preferably, the anti-breaking mechanism comprises a first clutch plate arranged at the end of the driving shaft; a second clutch plate arranged at the end of the driven shaft and abutting against the outer wall of the first clutch plate; a ball inserted into the outer wall of the first clutch plate and penetrating through the second clutch plate and movably connected with the second clutch plate; a first spring fixed to one side of the ball; a cross rod fixed to the outer wall of the ball near the first spring, penetrating through the second clutch plate and movably connected with the second clutch plate; a mounting portion arranged at the side of the first clutch plate and the second clutch plate away from each other; a limiting portion arranged outside the second clutch plate; wherein the ball and the first spring are matched, when the push rod meets resistance during movement, the ball moves away from the first clutch plate, separating the first clutch plate and the second clutch plate.

[0008] Preferably, the mounting portion comprises a first sleeve sleeved on the outer wall of the driving shaft and fixed to the side of the first clutch plate near the driving shaft and fixed to the outer wall of the driving shaft by a bolt; a second sleeve sleeved on the outer wall of the driven shaft and fixed to the side of the second clutch plate near the driven shaft and fixed to the outer wall of the driven shaft by a bolt; a key groove arranged on the inner wall of the first sleeve and the inner wall of the second sleeve; a key block fixed to the outer wall of the driving shaft and the outer wall of the driven shaft and slidably connected to the inner wall of the key groove; wherein the first sleeve and the second sleeve are inserted into the driving shaft and the driven shaft respectively through the cooperation of the key block and the key groove and fixed together by the bolts.

[0009] Preferably, the limiting portion comprises a receiving piece fixed above the ball; a plug rod penetrating through the second clutch plate and movably connected with the second clutch plate and abutting against the top of the receiving piece at the bottom; a second spring fixed to the outer wall of the second clutch plate; a cross plate fixed to the top of the plug rod and fixed to the top of the second spring at the bottom; wherein when the ball moves away from the first clutch plate, the receiving piece moves away from the plug rod under the drive of the ball, so that the second spring is elastically deformed, and the plug rod is inserted into the ball to limit it.

[0010] Preferably, the adjusting mechanism comprises a vertical plate sleeved on the outer wall of the first sleeve and the outer wall of the second sleeve; a first thread arranged on the inner wall of the vertical plate; a second thread arranged on the outer wall of the first sleeve and the outer wall of the second sleeve; a connecting column abutting against the side wall of the vertical plate and extending to the inside of the second clutch plate through the opening and movably connected with the second clutch plate; a connecting plate fixed to the end of the connecting column and fixed to the end of the first spring at the side wall; wherein the vertical plate drives the connecting column to move through the cooperation of the first thread and the second thread, so that the connecting plate drives the first spring to move and adjusts the elastic force of the first spring.

[0011] Beneficial effects

[0012] The utility model provides a packaging machine push rod break -proof clutch. Have following beneficial effect: this packaging machine push rod break -proof clutch passes through the cooperation of first clutch board, second clutch board, ball, first spring, cross bar, installation portion and limit portion, has avoided the break of push rod because of overload, solved the problem that push rod may meet various resistances because of product jam or mechanical failure in the process that packaging machine push rod removes non - woven fabric that has finished pushing and packing, because traditional packaging machine push rod and power device are usually rigid connection, when meeting overload condition, push rod cannot automatically release torque, and push rod is easy to break.

[0013] Through the cooperation of vertical plate, first thread, second thread, connecting column and connecting plate, the elasticity of the first spring is adjusted, and after the first spring works for a long time, the first spring will inevitably appear elasticity attenuation or performance fluctuation due to frequent stress, metal fatigue and environmental factors, which may cause the protection threshold of the break-proof clutch to deviate from the preset standard, triggering the overload break of the push rod or false triggering. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a structural schematic view of the utility model;

[0015] Figure 2 It is an appearance schematic view of the utility model;

[0016] Figure 3 It is Figure 1 It is a structural schematic view of first clutch board, second clutch board and driven shaft in the utility model;

[0017] Figure 4 It is Figure 3 It is a structural schematic view of cross bar, plug rod and vertical plate in the utility model.

[0018] In the drawing: 1, shell; 2, driving shaft; 3, shell cover; 4, driven shaft; 5, break -proof mechanism; 51, first clutch board; 52, second clutch board; 53, ball; 54, first spring; 55, cross bar; 56, installation portion; 561, first sleeve; 562, second sleeve; 563, key groove; 564, key block; 57, limit portion; 571, bearing piece; 572, plug rod; 573, second spring; 574, cross plate; 6, adjusting mechanism; 61, vertical plate; 62, first thread; 63, second thread; 64, connecting column; 65, connecting plate. DETAILED DESCRIPTION

[0019] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0020] During the process that the push rod of the packaging machine pushes and moves the non-woven fabric after packaging, the push rod is prone to breakage because the traditional push rod of the packaging machine and the power device are usually rigidly connected, and the push rod cannot automatically release the torque when overload occurs.

[0021] Therefore, the packaging machine push rod breakage prevention clutch is provided, the first clutch plate, the second clutch plate, the ball, the first spring, the cross rod, the mounting portion and the limiting portion are matched, the breakage of the push rod due to overload is avoided, and the problems that the push rod may be blocked by products or encounter various resistances due to mechanical failure during the process that the push rod of the packaging machine pushes and moves the non-woven fabric after packaging, the push rod cannot automatically release the torque when overload occurs, and the push rod is prone to breakage because the traditional push rod of the packaging machine and the power device are usually rigidly connected are solved.

[0022] Through the personnel in the art, the parts in the case are connected in turn, the specific connection and operation sequence should be referred to the following working principle, and the detailed connection means is the public technical knowledge in the art, and the following mainly introduces the working principle and process.

[0023] Embodiment one: by Figures 1-4 It can be known that the packaging machine push rod breakage prevention clutch comprises an outer shell 1, a shell cover 3 is hinged to the top of the outer shell 1, a driving shaft 2 and a driven shaft 4 are rotatably connected to the inner walls of the outer shell 1 through bearings respectively, the packaging machine push rod breakage prevention clutch further comprises a breakage prevention mechanism 5 and an adjusting mechanism 6, the breakage prevention mechanism 5 is arranged inside the outer shell 1, the adjusting mechanism 6 is arranged outside the breakage prevention mechanism 5, wherein the breakage prevention mechanism 5 protects the push rod from breakage when overload occurs, and the adjusting mechanism 6 adjusts the elastic force of the parts inside the breakage prevention mechanism 5.

[0024] In the implementation process, it is worth pointing out that the packaging machine push rod anti-break clutch is mainly composed of a shell 1, a shell cover 3, a driving shaft 2, a driven shaft 4, an anti-break mechanism 5 and an adjusting mechanism 6. The staff can install and detect the parts inside the shell 1 through the shell cover 3. The two sides of the shell 1 are respectively fixedly connected with connecting ears, and mounting holes are formed in the surfaces of the connecting ears. The staff can install the shell 1 to the specified position of the non-woven fabric packaging equipment through the mounting holes in the surfaces of the connecting ears. The left end of the driving shaft 2 is provided with a mounting hole. The staff connects the driving shaft 2 with the external driving device through the mounting hole on the driving shaft 2. The staff fixes the push rod to the right end of the driven shaft 4. The external driving device is started to drive the driving shaft 2 to rotate, so that the driven shaft 4 drives the push rod to move, thereby pushing the material. When the push rod is subjected to resistance, the driving shaft 2 and the driven shaft 4 are separated by the anti-break mechanism 5 to protect the push rod. The spring force of the parts inside the anti-break mechanism 5 is adjusted by the adjusting mechanism 6.

[0025] Specifically, first, the staff connects the driving shaft 2 with the external driving device. Then the staff fixes the push rod to the right end of the driven shaft 4. The staff starts the external driving device to drive the driving shaft 2 to rotate, so that the driven shaft 4 drives the push rod to move, thereby pushing the material.

[0026] Embodiment two: by Figures 1-4 It can be seen that the anti-break mechanism 5 comprises a first clutch plate 51, a second clutch plate 52, a ball 53, a first spring 54, a cross rod 55, a mounting portion 56 and a limiting portion 57. The first clutch plate 51 is arranged at the end of the driving shaft 2. The second clutch plate 52 is arranged at the end of the driven shaft 4, and the side wall is attached to the outer wall of the first clutch plate 51. The ball 53 is inserted into the outer wall of the first clutch plate 51 and penetrates through the second clutch plate 52 and is movably connected with the second clutch plate 52. The first spring 54 is fixedly connected to one side of the ball 53. The cross rod 55 is fixedly connected to the outer wall of the ball 53 close to one side of the first spring 54, penetrates through the second clutch plate 52 and is movably connected with the second clutch plate 52. The mounting portion 56 is arranged on the side where the first clutch plate 51 and the second clutch plate 52 are away from each other. The limiting portion 57 is arranged outside the second clutch plate 52. The cooperation of the ball 53 and the first spring 54 separates the first clutch plate 51 and the second clutch plate 52 when the push rod moves and encounters resistance.

[0027] In the implementation process, it is worth pointing out that, in the process of working, the driving shaft 2 drives the first clutch plate 51 to rotate, the first clutch plate 51 drives the ball 53 to rotate, thereby driving the second clutch plate 52 to rotate, and the second clutch plate 52 drives the driven shaft 4 to rotate, thereby driving the push rod to move. When the push rod is subjected to resistance and overloading occurs, the first clutch plate 51 continues to rotate when the driven shaft 4 and the second clutch plate 52 stop rotating, the first clutch plate 51 moves the ball 53, the ball 53 overcomes the elastic force of the first spring 54, the ball 53 moves away from the first clutch plate 51 and returns to the second clutch plate 52, the ball 53 drives the cross rod 55 to move, the cross rod 55 moves in the second clutch plate 52 and limits the ball 53. At this time, the first clutch plate 51 and the second clutch plate 52 are no longer connected by the ball 53, so that the first clutch plate 51 and the second clutch plate 52 are separated, the power transmission is cut off, and the breakage of the push rod due to overloading is avoided;

[0028] Further, the mounting portion 56 includes a first sleeve 561, a second sleeve 562, a key groove 563 and a key block 564. The first sleeve 561 is sleeved on the outer wall of the driving shaft 2 and is fixed to the side of the first clutch plate 51 close to the driving shaft 2 and is fixed to the outer wall of the driving shaft 2 by bolts. The second sleeve 562 is sleeved on the outer wall of the driven shaft 4 and is fixed to the side of the second clutch plate 52 close to the driven shaft 4 and is fixed to the outer wall of the driven shaft 4 by bolts. The key grooves 563 are formed in the inner walls of the first sleeve 561 and the second sleeve 562. The key blocks 564 are fixed to the outer walls of the driving shaft 2 and the driven shaft 4 and are slidingly connected to the inner walls of the key grooves 563. The first sleeve 561 and the second sleeve 562 are inserted into the driving shaft 2 and the driven shaft 4 respectively through the cooperation of the key blocks 564 and the key grooves 563 and are fixed together by bolts.

[0029] In the implementation process, it is worth pointing out that, in the process of working, the driving shaft 2 drives the first clutch plate 51 to rotate, the first clutch plate 51 drives the ball 53 to rotate, thereby driving the second clutch plate 52 to rotate, and the second clutch plate 52 drives the driven shaft 4 to rotate, thereby driving the push rod to move. When the push rod is subjected to resistance and overloading occurs, the first clutch plate 51 continues to rotate when the driven shaft 4 and the second clutch plate 52 stop rotating, the first clutch plate 51 moves the ball 53, the ball 53 overcomes the elastic force of the first spring 54, the ball 53 moves away from the first clutch plate 51 and returns to the second clutch plate 52, the ball 53 drives the cross rod 55 to move, the cross rod 55 moves in the second clutch plate 52 and limits the ball 53. At this time, the first clutch plate 51 and the second clutch plate 52 are no longer connected by the ball 53, so that the first clutch plate 51 and the second clutch plate 52 are separated, the power transmission is cut off, and the breakage of the push rod due to overloading is avoided;

[0030] Further, the limiting part 57 comprises a receiving sheet 571, an insertion rod 572, a second spring 573 and a horizontal plate 574, the receiving sheet 571 is fixedly connected above the ball 53; the insertion rod 572 penetrates the second clutch plate 52 and is movably connected with the second clutch plate 52, and the bottom is attached to the top of the receiving sheet 571; the second spring 573 is fixedly connected to the outer wall of the second clutch plate 52; the horizontal plate 574 is fixedly connected to the top of the insertion rod 572, and the bottom is fixedly connected to the top of the second spring 573; wherein, when the ball 53 leaves the first clutch plate 51, the receiving sheet 571 is driven by the ball 53 to leave the insertion rod 572, so that the second spring 573 is elastically deformed, so that the insertion rod 572 is inserted into the ball 53 to limit it;

[0031] In the specific implementation process, it is particularly worth pointing out that when the ball 53 moves, the ball 53 drives the receiving sheet 571 to move, when the ball 53 moves below the insertion rod 572, at this time, the insertion rod 572 is separated from the receiving sheet 571, the second spring 573 rebounds, the second spring 573 drives the horizontal plate 574 to move through the elastic force, the horizontal plate 574 drives the insertion rod 572 to move, the insertion rod 572 moves in the second clutch plate 52, and finally the insertion rod 572 is inserted into the insertion hole on the surface of the ball 53 to limit the ball 53, when the ball 53 resets, the worker opens the shell cover 3, pulls the horizontal plate 574, so that the second spring 573 is stretched, the insertion rod 572 is separated from the ball 53, the first spring 54 resets the ball 53 through the elastic force, after finishing, the shell cover 3 is closed, and the ball 53 is limited;

[0032] Further, the adjusting mechanism 6 comprises a vertical plate 61, a first screw 62, a second screw 63, a connecting column 64 and a connecting plate 65, the vertical plate 61 is sleeved on the outer wall of the first sleeve 561 and the outer wall of the second sleeve 562; the first screw 62 is opened on the inner wall of the vertical plate 61; the second screw 63 is opened on the outer wall of the first sleeve 561 and the outer wall of the second sleeve 562; the connecting column 64 is attached to the side wall of the vertical plate 61, and extends to the inside of the second clutch plate 52 through the opening and is movably connected with the second clutch plate 52; the connecting plate 65 is fixedly connected to the end of the connecting column 64, and the side wall is fixedly connected to the end of the first spring 54; wherein, through the cooperation of the first screw 62 and the second screw 63, the vertical plate 61 drives the connecting column 64 to move, so that the connecting plate 65 drives the first spring 54 to move, and the elastic force of the first spring 54 is adjusted;

[0033] In the implementation process, it is worth pointing out that the shape of the connecting column 64 is square, the staff rotates the vertical plate 61, the vertical plate 61 drives the first screw 62 to move on the second screw 63, the vertical plate 61 drives the connecting column 64 to move, the connecting column 64 moves in the second clutch plate 52, and the connecting column 64 is limited, the connecting column 64 drives the connecting plate 65 to move, and the connecting plate 65 drives the first spring 54 to move, so as to adjust the elastic force of the first spring 54;

[0034] Specifically, the staff opens the shell cover 3, moves the first sleeve 561 and the second sleeve 562, drives the first clutch plate 51 and the second clutch plate 52 to move, moves the key groove 563 in the first sleeve 561, inserts the corresponding key groove 563 into the key block 564 on the surface of the driving shaft 2, and inserts the key groove 563 in the second sleeve 562 into the key block 564 on the surface of the driven shaft 4, and then the staff rotates the bolt on the first sleeve 561 and the second sleeve 562 to fix the first sleeve 561 and the second sleeve 562, and the installation of the first clutch plate 51 and the second clutch plate 52 is completed. After that, the staff closes the shell cover 3, so that the push rod works. When the push rod is subjected to resistance and overloading occurs, at this time, the first clutch plate 51 continues to rotate when the driven shaft 4 and the second clutch plate 52 stop rotating, the first clutch plate 51 moves the ball 53, the ball 53 overcomes the elastic force of the first spring 54, the ball 53 leaves the first clutch plate 51 and returns to the second clutch plate 52, the ball 53 drives the cross rod 55 to move, the cross rod 55 moves in the second clutch plate 52, and at the same time, when the ball 53 moves, the ball 53 drives the receiving piece 571 to move. When the ball 53 moves below the plug rod 572, the plug rod 572 is separated from the receiving piece 571 at this time, the second spring 573 rebounds, the second spring 573 drives the cross plate 574 to move through the elastic force, the cross plate 574 drives the plug rod 572 to move, the plug rod 572 moves in the second clutch plate 52, and finally the plug rod 572 is inserted into the insertion hole on the surface of the ball 53 to limit the ball 53. At this time, the first clutch plate 51 and the second clutch plate 52 are no longer connected by the ball 53, so that the first clutch plate 51 and the second clutch plate 52 are separated, the power transmission is cut off, and the push rod is prevented from being broken due to overload. When the ball 53 is reset, the staff opens the shell cover 3 and pulls the cross plate 574, so that the second spring 573 is stretched and the plug rod 572 is separated from the ball 53. The first spring 54 resets the ball 53 through the elastic force, and then the shell cover 3 is closed. When adjusting the elastic force of the first spring 54, the staff rotates the vertical plate 61, the vertical plate 61 drives the first screw 62 to move on the second screw 63, the vertical plate 61 drives the connecting column 64 to move, the connecting column 64 moves in the second clutch plate 52, and the connecting column 64 is limited, the connecting column 64 drives the connecting plate 65 to move, and the connecting plate 65 drives the first spring 54 to move.

[0035] While the embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the application, which is defined by the appended claims and their equivalents.

Claims

1. A breakaway clutch for a pusher bar of a packaging machine, comprising a housing (1), characterized in that: The top of the shell (1) is hinged with a shell cover (3), the inner wall of the shell (1) is rotatably connected with a driving shaft (2) and a driven shaft (4) on both sides respectively, and the packaging machine push rod break-proof clutch further comprises: A break-proof mechanism (5) is arranged inside the shell (1); An adjusting mechanism (6) is arranged outside the break-proof mechanism (5); Wherein, the push rod is protected by the break-proof mechanism (5) to prevent the push rod from breaking when overloaded, and the break-proof mechanism (5) is adjusted by the adjusting mechanism (6).

2. The package push rod breakaway clutch of claim 1, wherein: The break-proof mechanism (5) comprises: A first clutch plate (51) is arranged at the end of the driving shaft (2); A second clutch plate (52) is arranged at the end of the driven shaft (4), and the side wall is attached to the outer wall of the first clutch plate (51); A ball (53) is inserted into the outer wall of the first clutch plate (51), penetrates the second clutch plate (52), and is movably connected with the second clutch plate (52); A first spring (54) is fixed to one side of the ball (53); A cross rod (55) is fixed to the outer wall of the ball (53) near the first spring (54), penetrates the second clutch plate (52), and is movably connected with the second clutch plate (52); A mounting portion (56) is arranged on the side of the first clutch plate (51) and the second clutch plate (52) away from each other; A limiting portion (57) is arranged outside the second clutch plate (52); Wherein, the ball (53) and the first spring (54) cooperate, when the push rod moves and encounters resistance, the ball (53) moves away from the first clutch plate (51), and the first clutch plate (51) and the second clutch plate (52) are separated.

3. The package push rod breakaway clutch of claim 2, wherein: The mounting portion (56) comprises: A first sleeve (561) is sleeved on the outer wall of the driving shaft (2), is fixed to the side of the first clutch plate (51) near the driving shaft (2), and is fixed to the outer wall of the driving shaft (2) by bolts; A second sleeve (562) is sleeved on the outer wall of the driven shaft (4), is fixed to the side of the second clutch plate (52) near the driven shaft (4), and is fixed to the outer wall of the driven shaft (4) by bolts; Key grooves (563) are formed in the inner walls of the first sleeve (561) and the second sleeve (562); Key blocks (564) are fixed to the outer walls of the driving shaft (2) and the driven shaft (4), and are slidably connected to the inner walls of the key grooves (563); Wherein, the first sleeve (561) and the second sleeve (562) are inserted into the driving shaft (2) and the driven shaft (4) respectively by the cooperation of the key blocks (564) and the key grooves (563), and are fixed together by bolts.

4. The package push rod breakaway clutch of claim 2, wherein: The limiting portion (57) comprises: A receiving piece (571) is fixed above the ball (53); The insertion rod (572) penetrates the second clutch plate (52) and is movably connected with the second clutch plate (52), and the bottom is attached to the top of the receiving piece (571); The second spring (573) is fixedly connected to the outer wall of the second clutch plate (52); The horizontal plate (574) is fixedly connected to the top of the insertion rod (572), and the bottom is fixedly connected to the top of the second spring (573); When the ball (53) is away from the first clutch plate (51), the receiving piece (571) is driven by the ball (53) to move away from the insertion rod (572), so that the second spring (573) is elastically deformed, and the insertion rod (572) is inserted into the ball (53) to limit it.

5. The package push rod breakaway clutch of claim 3, wherein: The adjusting mechanism (6) comprises: The vertical plate (61) is sleeved on the outer wall of the first sleeve (561) and the outer wall of the second sleeve (562); The first screw thread (62) is arranged on the inner wall of the vertical plate (61); The second screw thread (63) is arranged on the outer wall of the first sleeve (561) and the outer wall of the second sleeve (562); The connecting column (64) is attached to the side wall of the vertical plate (61), and extends to the inside of the second clutch plate (52) through the opening and is movably connected with the second clutch plate (52); The connecting plate (65) is fixedly connected to the end of the connecting column (64), and the side wall is fixedly connected to the end of the first spring (54); Through the cooperation of the first screw thread (62) and the second screw thread (63), the vertical plate (61) drives the connecting column (64) to move, so that the connecting plate (65) drives the first spring (54) to move, and the elastic force of the first spring (54) is adjusted.

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