Spring force unloading tool

Abstract

The utility model relates to the technical field of equipment maintenance, and provides a spring force unloading tool which is suitable for a compression spring cylinder, the compression spring cylinder is provided with a spring seat, a connecting rod and an elastic piece, the spring seat can slide in the compression spring cylinder in the axial direction, one end of the connecting rod abuts against the spring seat in the axial direction in a one-way mode, and the other end of the connecting rod can extend out of a first end face. The elastic piece enables the connecting rod to always have the trend of moving towards one side of the second end face through the spring seat. The spring force unloading tool comprises a supporting body and an abutting rod. The supporting body comprises an abutting part, and the abutting part is located in the compression spring cylinder and located between the second end face and the spring seat, so that the connecting rod can be disengaged from the spring seat in the axial direction. The abutting rod penetrates through the second end face and can abut against the connecting rod in the axial direction, and the other end of the connecting rod extends out of the first end face. The pneumatic actuating mechanism can be prevented from being comprehensively disassembled when the containment isolating valve is abnormally closed, so that the loss of parts required to be replaced is reduced, and the maintenance cost and time are greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of equipment maintenance, in particular to a spring force unloading tool. Background Art

[0002] like Figures 1 to 3 The figure shows an existing pneumatic actuator, comprising a compression spring cylinder, a shift fork cylinder, and an air cylinder. A spring seat slides within the compression spring cylinder, which is unidirectionally abutted against a connecting rod. The spring seat allows an elastic member to drive the connecting rod axially away from the shift fork cylinder via the spring seat. A piston slides within the air cylinder, which is fixedly connected to a pneumatic rod. The pneumatic rod and connecting rod are connected by a slider, which slides onto a guide rod within the shift fork. The slider and shift fork are slidably interlocked. Movement of the slider can shift the shift fork, switching the valve controlled by the shift fork between open and closed states.

[0003] Generally, when the valve needs to be opened, the air source is introduced through the cylinder, the piston drives the pneumatic rod, and the connecting rod is pulled by the slider. At this time, the connecting rod drives the spring seat to compress the elastic part, and the slider toggles the fork to open the valve; when the valve needs to be closed, the air source is stopped, the elastic part restores its deformation, and the spring seat pulls the connecting rod, slider, pneumatic rod and piston to reset them, and the slider toggles the fork to close the valve.

[0004] When the gas source fails, it is necessary to manually drive the assembly to open and close the valve. By turning the handwheel, the threaded rod is driven. The threaded rod is threadedly connected to the end face of the compression spring cylinder, which can abut the connecting rod along the axial direction and drive the slider to shift the fork through the connecting rod.

[0005] However, as the elastic member compresses, the pressure between the connecting rod and the threaded rod increases. According to the friction formula, friction F = μN, where μ is the friction coefficient and N is the pressure between the two. When μ is constant, the larger N is, the greater the friction F is. As the threaded rod rotates, the connecting rod tends to rotate with the threaded rod. As the elastic member compresses, the rotation tendency of the connecting rod becomes more obvious, causing the threaded connection between the connecting rod and the slider to loosen. The connecting rod gradually disengages from the slider, resulting in a shortened slider stroke, which in turn causes the valve to close malpositioned and unable to fully close. During maintenance, the elastic member causes the connecting rod to always tend to move away from the fork cylinder through the spring seat, causing most of the connecting rod to retreat into the compression spring cylinder, leaving the exposed portion too short. The other side of the slider is connected to a piston with a limited stroke. If the connecting rod is pulled out of the compression spring cylinder, the connecting rod squeezes the elastic member through the spring seat, increasing the friction between the connecting rod and the spring seat and / or the threaded rod, making it difficult for the threaded rod to rotate and complete the threaded connection with the slider. The pneumatic actuator needs to be completely disassembled for easy repair, which increases maintenance costs and time.

[0006] Therefore, a spring force unloading tool is urgently needed to solve the above technical problems. Utility Model Content

[0007] The purpose of the utility model is to provide a spring force unloading tool, which can avoid the complete disassembly of the pneumatic actuator when the containment isolation valve is abnormally closed, reduce the loss of necessary replacement parts, and greatly save maintenance costs and time.

[0008] To achieve this purpose, the present invention adopts the following technical solutions:

[0009] A spring force unloading tool is suitable for a compression spring cylinder. The compression spring cylinder includes a first end face and a second end face opposite to each other in the axial direction, and is equipped with a spring seat, a connecting rod and an elastic member. The spring seat can slide in the axial direction within the compression spring cylinder. One end of the connecting rod is in unidirectional contact with the spring seat in the axial direction, and the other end can extend from the first end face. The elastic member causes the connecting rod to always have a tendency to move toward the second end face through the spring seat. The spring force unloading tool includes:

[0010] a support body, the support body including an abutment portion, the abutment portion being located in the compression spring cylinder and between the second end surface and the spring seat, so that the connecting rod can be separated from the spring seat in the axial direction;

[0011] The abutment rod passes through the second end surface and can abut against the connecting rod along the axial direction so that the other end of the connecting rod extends out of the first end surface.

[0012] As a preferred technical solution of the above-mentioned spring force unloading tool, it also includes a positioning plate, the positioning plate is fixed to the second end surface, and the abutment rod is threadedly connected to the positioning plate.

[0013] As an optimal technical solution for the above-mentioned spring force unloading tool, the above-mentioned positioning plate includes a first plate body and a second plate body, the above-mentioned first plate body is fixed to the above-mentioned second end face, the above-mentioned second plate body and the above-mentioned first plate body are arranged and fixed along the above-mentioned axial direction, and the above-mentioned abutment rod is threadedly connected to the above-mentioned second plate body.

[0014] As a preferred technical solution of the above-mentioned spring force unloading tool, the above-mentioned first disk body and the above-mentioned second end face are fixed by threaded fasteners.

[0015] As a preferred technical solution of the above-mentioned spring force unloading tool, it also includes an adjusting member, and the above-mentioned support body also includes a connecting portion, the above-mentioned connecting portion is fixedly connected to the above-mentioned abutting portion and exposed outside the above-mentioned compression spring cylinder, one end of the above-mentioned adjusting member is connected to the above-mentioned second end face, and the above-mentioned adjusting member can drive the above-mentioned connecting portion to move along the above-mentioned axial direction so that one side end face of the above-mentioned abutting portion abuts against the above-mentioned second end face.

[0016] As a preferred technical solution of the above-mentioned spring force unloading tool, the above-mentioned adjusting member is threadedly connected to the above-mentioned second end face.

[0017] As an optimal technical solution for the above-mentioned spring force unloading tool, the above-mentioned adjusting member is a stepped shaft, the small diameter section of the above-mentioned adjusting member can pass through the above-mentioned connecting part and is located on the side of the above-mentioned connecting part facing away from the above-mentioned second end face, and the shaft shoulder of the above-mentioned adjusting member is axially abutted against the above-mentioned connecting part.

[0018] As a preferred technical solution for the above-mentioned spring force unloading tool, the above-mentioned connecting part is provided with a U-shaped groove, the opening in the depth direction of the above-mentioned U-shaped groove is formed on the end face of the above-mentioned connecting part, and the depth direction of the above-mentioned U-shaped groove is perpendicular to the above-mentioned axial direction, and the end face of the above-mentioned U-shaped groove facing away from the above-mentioned second end face is provided with a rib, the above-mentioned adjusting part can enter the above-mentioned U-shaped groove from the above-mentioned opening, and the axial shoulder of the above-mentioned adjusting part abuts against the above-mentioned rib along the above-mentioned axial direction.

[0019] As a preferred technical solution of the above-mentioned spring force unloading tool, the depth direction of the above-mentioned U-shaped groove is parallel to the circumferential direction of the above-mentioned abutment rod.

[0020] As a preferred technical solution of the above-mentioned spring force unloading tool, the small-diameter section of the above-mentioned adjusting member can pass through the above-mentioned second disk body.

[0021] Beneficial effects of the utility model:

[0022] The utility model provides a spring force unloading tool suitable for a compression spring cylinder, wherein the compression spring cylinder includes a first end face and a second end face opposite to each other in the axial direction, and is equipped with a spring seat, a connecting rod, and an elastic member. The spring seat can slide axially in the compression spring cylinder, one end of the connecting rod is in axial one-way abutment with the spring seat, and the other end can extend from the first end face. The elastic member causes the connecting rod to always have a tendency to move toward the second end face through the spring seat. The spring force unloading tool includes a support body and an abutting rod. The support body includes an abutting portion, which is located in the compression spring cylinder and between the second end face and the spring seat, so that the connecting rod can be axially disengaged from the spring seat; the abutting rod passes through the second end face, can abut against the connecting rod in the axial direction, and causes the other end of the connecting rod to extend from the first end face.

[0023] Assume that the axial length of the abutment portion is D1; ​​when the elastic member is in a balanced state without being affected by external forces, the distance between the spring seat and the second end face is D2, satisfying D1>D2≥0, and at this time, the length of the connecting rod extending out of the compression spring cylinder is D3. When the abutment portion is clamped between the spring seat and the second end face, the elastic member cannot be completely released, and the force of the elastic member is transmitted to the second end face through the spring seat and the abutment portion. The distance between the spring seat and the second end face is D1. When the length of the connecting rod extending out of the compression spring cylinder is between D3 and D3+D1-D2, the connecting rod is not affected by the force of the elastic member, that is, there is no friction between the connecting rod and the spring seat, and the connecting rod can be easily rotated to complete the connection of the slider. In this way, the complete disassembly of the pneumatic actuator when the containment isolation valve is abnormally closed can be avoided, the loss of necessary replacement parts can be reduced, and the maintenance cost and time can be greatly saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0025] Figure 1 It is a structural diagram of an existing pneumatic actuator;

[0026] Figure 2 This is a front view of an existing pneumatic actuator;

[0027] Figure 3 yes Figure 2 Cross-sectional view at AA in the middle;

[0028] Figure 4 This is a schematic diagram of the assembly of the spring force unloading tool and the pneumatic actuator (excluding the manual drive component) provided by the embodiment of the utility model. Figure 1 ;

[0029] Figure 5 This is a schematic diagram of the assembly of the spring force unloading tool and the pneumatic actuator (excluding the manual drive component) provided by the embodiment of the utility model. Figure 2 ;

[0030] Figure 6 yes Figure 5 A partial enlarged view of the cross-sectional view at the middle BB;

[0031] Figure 7 It is a structural diagram of a spring force unloading tool provided by an embodiment of the utility model;

[0032] Figure 8It is a top view of the spring force unloading tool provided by an embodiment of the utility model;

[0033] Figure 9 This is a schematic diagram of the structure of the support provided by the embodiment of the utility model Figure 1 ;

[0034] Figure 10 This is a schematic diagram of the structure of the support provided by the embodiment of the utility model Figure 2 ;

[0035] Figure 11 This is a schematic structural diagram of an adjusting member provided in an embodiment of the present utility model;

[0036] Figure 12 This is a schematic diagram of the assembly of the adjusting member and the supporting body provided in an embodiment of the present utility model;

[0037] Figure 13 This is a schematic structural diagram of the abutment rod provided by an embodiment of the present utility model;

[0038] Figure 14 It is a structural schematic diagram of the positioning plate provided by an embodiment of the utility model.

[0039] In the picture:

[0040] X, first direction;

[0041] 1. Pneumatic actuator;

[0042] 100, compression spring cylinder; 101, first end surface; 102, second end surface; 110, spring seat; 120, connecting rod; 130, elastic member; 140, limit member;

[0043] 200, fork cylinder; 210, fork; 220, guide rod; 230, slider;

[0044] 300, cylinder; 310, piston; 320, pneumatic rod;

[0045] 400, manual drive assembly; 410, threaded rod; 420, handwheel; 430, fixed plate;

[0046] 2. Spring force unloading tool;

[0047] 500, support body; 510, abutment portion; 511, third end surface; 512, fourth end surface; 520, connection portion; 521, U-shaped groove; 522, rib; 530, limiting groove;

[0048] 600, abutment rod; 610, joint;

[0049] 700, positioning plate; 710, first plate body; 720, second plate body; 730, connecting column;

[0050] 800, adjusting part; 810, small diameter section; 820, large diameter section; 830, shaft shoulder. DETAILED DESCRIPTION

[0051] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0052] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0053] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0054] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0055] like Figures 1 to 3As shown, the existing pneumatic actuator 1 includes a compression spring cylinder 100, a fork cylinder 200 and a cylinder 300. The compression spring cylinder 100, the fork cylinder 200 and the cylinder 300 are connected in sequence along the first direction X. Specifically, the axis of the compression spring cylinder 100 is parallel to the first direction X, and includes a first end face 101 and a second end face 102 that are opposite to each other in the axial direction, wherein the first end face 101 is adjacent to the fork cylinder 200, and the second end face 102 is located on the side of the first end face 101 that is away from the fork cylinder 200. A spring seat 110, an elastic member 130 and a connecting rod 120 are installed in the compression spring cylinder 100, and the spring seat 110 is slidably arranged in the compression spring cylinder 100, and one end of the connecting rod 120 axially penetrates the spring seat 110 and is connected to the limit The spring seat 110 is connected to the connecting rod 120 by the limiting member 140, and the limiting member 140 can be axially abutted with the end face of the spring seat 110 facing away from the first end face 101 in one direction, that is, the spring seat 110 can only drive the connecting rod 120 to move toward the side where the second end face 102 is located in the axial direction through the limiting member 140, but cannot drive the connecting rod 120 to move toward the side where the first end face 101 is located in the axial direction through the limiting member 140. Exemplarily, the elastic member 130 is a spring, which is sleeved outside the connecting rod 120 and located between the spring seat 110 and the first end face 101. The other end of the connecting rod 120 can pass through the first end face 101 and extend into the fork cylinder 200. A guide rod 220, a slider 230 and a fork 210 are installed in the fork cylinder 200. A piston 310 and a pneumatic rod 320 are installed in the cylinder 300. The piston 310 is slidably arranged in the cylinder 300. The piston 310 is fixed to one end of the pneumatic rod 320. The other end of the pneumatic rod 320 is connected to the other end of the connecting rod 120 through the slider 230, wherein the connecting rod 120 and the slider 230 are threadedly connected, and the slider 230 is slidably sleeved on the guide rod 220. The axis of the guide rod 220 is parallel to the first direction X, and the slider 230 is slidably inserted into the fork 210.

[0056] Under normal working conditions, when air is supplied to the air supply port of the cylinder 300, compressed air enters the cylinder 300 from the air supply port and pushes the piston 310 to move axially toward the side away from the fork cylinder 200, and the pneumatic rod 320 pulls the connecting rod 120 and the spring seat 110 through the slider 230 to move toward the side away from the second end face 102. At this time, the elastic member 130 is squeezed and is in an energy storage state. The movement of the slider 230 shifts the shift fork 210, causing the valve to switch from the closed state to the open state; when the air supply port of the cylinder 300 stops supplying air, the elastic member 130 recovers its deformation and drives the connecting rod 120 to move toward the second end face 102 through the spring seat 110. The connecting rod 120 pulls the pneumatic rod 320 and the piston 310 to reset through the slider 230. The slider 230 shifts the shift fork 210, and the valve switches to the closed state.

[0057] However, when the valve cannot be switched on and off by the cylinder 300, manual operation is required. Specifically, the pneumatic actuator 1 further includes a manual drive assembly 400 as a redundant design. A first avoidance hole is provided at the center of the second end face 102 of the compression spring cylinder 100. The manual drive assembly 400 includes a threaded rod 410, a handwheel 420, and a fixed disk 430. The fixed disk 430 is fixed to the outer end face of the second end face 102. One end of the threaded rod 410 passes through the fixed disk 430 and the first avoidance hole and then abuts against the connecting rod 120 in the axial direction. The threaded rod 410 is threadedly connected to the fixed disk 430. The handwheel 420 is fixedly sleeved on the other end of the threaded rod 410. The threaded rod 410 is rotated by the handwheel 420, so that the threaded rod 410 can move back and forth axially relative to the second end face 102. The threaded rod 410 can abut against the connecting rod 120 in the axial direction, so that the connecting rod 120 drives the shift fork 210 through the slider 230 to switch the valve's on and off state.

[0058] Due to the action of the elastic member 130, the connecting rod 120 always has a tendency to move toward the second end face 102, that is, the connecting rod 120 always maintains axial contact with the threaded rod 410, and as the spring is compressed, the pressure between the connecting rod 120 and the threaded rod 410 becomes greater. According to the friction formula, friction force F = μN, μ is the friction coefficient, and N is the pressure between the two. When μ is constant, the greater N, the greater the friction force F, resulting in that when the threaded rod 410 rotates, the connecting rod 120 has a tendency to rotate with the threaded rod 410, and as the elastic member 130 is compressed, the rotation tendency of the connecting rod 120 becomes more obvious, resulting in the loosening of the threaded connection between the connecting rod 120 and the slider 230, and the connecting rod 120 gradually comes out of the slider 230, resulting in the shortening of the stroke of the slider 230, which in turn causes the valve to be misaligned and unable to be completely closed.

[0059] During maintenance, since the elastic member 130 passes through the spring seat 110, the connecting rod 120 always has a tendency to move toward the second end face 102, causing most of the connecting rod 120 to retreat into the compression spring cylinder 100, and the exposed part is too short. The other side of the slider 230 is connected to the piston 310, and its stroke is limited. If the connecting rod 120 is pulled out of the compression spring cylinder 100, the connecting rod 120 squeezes the spring through the spring seat 110, resulting in an increase in the friction between the connecting rod 120 and the spring seat 110 and / or the threaded rod 410, making it difficult for the threaded rod 410 to rotate and complete the threaded connection with the slider 230.

[0060] For this reason, Figures 4 to 14As shown, the present invention provides a spring force unloading tool 2 suitable for use in a compression spring cylinder 100. The spring force unloading tool 2 includes a support body 500 and an abutting rod 600. The support body 500 includes an abutting portion 510 located within the compression spring cylinder 100 and between the second end surface 102 and the spring seat 110, allowing the connecting rod 120 to axially disengage from the spring seat 110. The abutting rod 600 extends through the second end surface 102 and can axially abut the connecting rod 120, allowing the other end of the connecting rod 120 to extend beyond the first end surface 101.

[0061] When in use, the fixed plate 430, the threaded rod 410 and the hand wheel 420 are removed, and the air source is introduced into the air inlet of the cylinder 300. The connecting rod 120 and the spring seat 110 are pulled toward the first end face 101 through the piston 310, the pneumatic rod 320 and the slider 230, so that the elastic member 130 is compressed. At this time, the abutting portion 510 of the support body 500 is placed into the compression spring cylinder 100 from the first avoidance port. The abutting portion 510 of the support body 500 is located at the second end face 102 and the spring seat 110 is located at the second end face 102 and the spring seat 110 is located at the second end face 101 and the spring seat 1 ... The spring seat 110 is positioned between the spring seat 110 and the second end face 102, and the air source is turned off to release the elastic member 130. The elastic member 130 causes the spring seat 110 to move toward the second end face 102 and abut against the abutment portion 510. At this time, the spring seat 110 and the second end face 102 are axially spaced apart. The connecting rod 120 is within this interval and can move relative to the spring seat 110 without being affected by the elastic member 130. As a result, the connecting rod 120 can further extend out of the first end face 101 in the axial direction and no friction is generated with the spring seat 110.

[0062] For example, assuming the axial length of the abutment portion 510 is D1, when the elastic member 130 is in equilibrium without being acted upon by external forces, the distance between the spring seat 110 and the second end face 102 is D2, satisfying the condition D1>D2≥0. At this point, the length of the connecting rod 120 extending out of the compression spring cylinder 100 is D3. When the abutment portion 510 is sandwiched between the spring seat 110 and the second end face 102, the elastic member 130 cannot be fully released. The force of the elastic member 130 is transmitted to the second end face 102 through the spring seat 110 and the abutment portion 510. The distance between the spring seat 110 and the second end face 102 is D1. Therefore, when the length of the connecting rod 120 extending out of the compression spring cylinder 100 is between D3 and D3+D1-D2, the connecting rod 120 is not affected by the force of the elastic member 130, i.e., no friction is generated between the connecting rod 120 and the spring seat 110. Consequently, the connecting rod 120 can be easily rotated to complete the connection with the slider 230.

[0063] In this way, the complete disassembly of the pneumatic actuator 1 when the containment isolation valve is abnormally closed can be avoided, thereby reducing the loss of necessary replacement parts and greatly saving maintenance costs and time.

[0064] Furthermore, the support body 500 may include multiple abutment portions 510 , which are distributed around the axis of the abutment rod 600 ; or, as shown in this embodiment, one support body 500 includes only one abutment portion 510 , and multiple support bodies 500 are distributed around the axis of the abutment rod 600 .

[0065] Furthermore, the stopper 140 is a nut. After the connecting rod 120 passes through the spring seat 110, it is threadedly connected to the nut. The nut can unidirectionally abut against the end surface of the spring seat 110 facing away from the first end surface 101 along the axial direction. A joint 610 is installed at the end of the abutting rod 600, and the joint 610 is used to fix with the nut. In this way, the abutting rod 600 can not only further push the connecting rod 120 out of the compression spring cylinder 100, but also control the rotation of the connecting rod 120 to complete the threaded connection with the slider 230.

[0066] Optionally, the spring force unloading tool 2 further includes a positioning plate 700 , the positioning plate 700 is fixed to the second end surface 102 , and the abutting rod 600 is threadedly connected to the positioning plate 700 .

[0067] In this way, the positioning plate 700 is fixed to the second end face 102, the positioning plate 700 is provided with a threaded hole, and at least part of the peripheral side wall of the abutment rod 600 is provided with an external thread. The abutment rod 600 can be threadedly connected to the positioning plate 700 in the threaded hole. By rotating the abutment rod 600, the abutment rod 600 can move back and forth axially, and then can move axially against the connecting rod 120, and one end of the connecting rod 120 can extend out of the compression spring cylinder 100 through the first end face 101, and the threaded connection has a certain self-locking function, which can withstand a certain axial load. When the connecting rod 120 and the slider 230 are reassembled, the relative position of the connecting rod 120 and the first end face 101 can still be maintained.

[0068] Optionally, the positioning plate 700 includes a first plate body 710 and a second plate body 720 . The first plate body 710 is fixed to the second end surface 102 . The second plate body 720 is axially spaced and fixed to the first plate body 710 . The abutment rod 600 is threadedly connected to the second plate body 720 .

[0069] Specifically, the first disk body 710 and the second disk body 720 are connected and fixed by a connecting column 730, a threaded hole is opened in the second disk body 720, and the first disk body 710 is opened with a second avoidance hole, and the second avoidance hole is coaxially arranged with the threaded hole. The abutment rod 600 can pass through the threaded hole, the second avoidance hole and the first avoidance hole and then abut against the connecting rod 120. The positioning disk 700 can limit the abutment rod 600 through the threaded hole and the second avoidance hole, standardize the moving direction of the abutment rod 600, and form multiple support points distributed along the axial direction to straighten the abutment rod 600.

[0070] Optionally, the first disk body 710 and the second end surface 102 are fixed by threaded fasteners.

[0071] Optionally, the spring force unloading tool 2 also includes an adjusting member 800, and the support body 500 also includes a connecting portion 520, which is fixedly connected to the abutting portion 510 and exposed outside the compression spring cylinder 100. One end of the adjusting member 800 is connected to the second end face 102, and the adjusting member 800 can axially drive the connecting portion 520 to move so that one side end face of the abutting portion 510 abuts against the second end face 102.

[0072] Exemplarily, the abutment portion 510 includes a third end face 511 and a fourth end face 512, the fourth end face 512 is used to abut against the spring seat 110, and the third end face 511 is used to abut against the second end face 102. The abutment portion 510 and the connecting portion 520 are axially spaced apart, and a limiting groove 530 is formed therebetween. The third end face 511 is one of the side walls of the limiting groove 530, and the edge of the first avoidance opening of the second end face 102 can be inserted into the limiting groove 530. Assume that the axial thickness of the second end face 102 is L1, and the axial distance between the connecting portion 520 and the abutting portion 510 is L2. Generally, in order to adapt to compression spring cylinders 100 of various sizes, L2 ≥ L1. As a result, there is an axial movable margin between the second end face 102 and the support body 500, and relative stability cannot be guaranteed. Therefore, in this embodiment, an adjusting member 800 is provided, and the adjusting member 800 is at least partially located between the connecting portion 520 and the second end face 102. The adjusting member 800 can drive the support body 500 to move axially relative to the second end face 102 through the connecting portion 520, so that the third end face 511 of the abutting portion 510 abuts against the second end face 102, and the adjusting member 800 can maintain the abutting relationship between the third end face 511 and the second end face 102, thereby maintaining the stability of the support body 500 and the second end face 102.

[0073] Optionally, the adjusting member 800 is threadedly connected to the second end surface 102 .

[0074] For example, in this embodiment, a threaded hole is provided on the second end face 102, and the adjusting member 800 is a columnar member. One end of the adjusting member 800 is inserted into the threaded hole and is threadedly connected to the second end face 102. By rotating the adjusting member 800, it can move axially relative to the second end face 102, thereby changing the relative position of the support body 500 and the second end face 102.

[0075] In other embodiments, the adjusting member 800 may be a telescopic rod, or other mechanism capable of achieving a linear telescopic function.

[0076] Optionally, the adjusting member 800 is a stepped shaft, the small diameter section 810 of the adjusting member 800 can pass through the connecting portion 520 and is located on the side of the connecting portion 520 facing away from the second end surface 102 , and the shoulder 830 of the adjusting member 800 abuts against the connecting portion 520 along the axial direction.

[0077] Exemplarily, the adjusting member 800 is a stepped shaft, including a large diameter section 820, a small diameter section 810, and a shoulder 830 formed between the large diameter section 820 and the small diameter section 810. The large diameter section 820 of the adjusting member 800 is located between the connecting portion 520 and the second end face 102, and the small diameter section 810 can pass through the connecting portion 520. The shoulder 830 abuts the connecting portion 520 on the side facing the second end face 102.

[0078] In other embodiments, the adjusting member 800 is a columnar structure, and a bearing is provided on the outer sleeve of the adjusting member 800. The adjusting member 800 is fixed to the inner ring of the bearing, such as an interference fit. After one end of the adjusting member 800 passes through the connecting portion 520, the outer ring of the bearing and the connecting portion 520 are axially abutted, and the bearing is located between the connecting portion 520 and the second end face 102. In this way, the bearing can reduce the friction between the adjusting member 800 and the connecting portion 520 when the adjusting member 800 rotates relative to the support body 500.

[0079] Optionally, the connecting portion 520 is provided with a U-shaped groove 521, and an opening in the depth direction of the U-shaped groove 521 is formed on the end face of the connecting portion 520, and the depth direction of the U-shaped groove 521 is perpendicular to the axial direction. A rib 522 is provided on the end face of the U-shaped groove 521 facing away from the second end face 102, and the adjusting member 800 can enter the U-shaped groove 521 from the opening, and the shoulder 830 of the adjusting member 800 is in axial contact with the rib 522.

[0080] Optionally, the depth direction of the U-shaped groove 521 is parallel to the circumference of the abutment rod 600. In this way, the adjusting member 800 can be inserted into the U-shaped groove 521 by rotating the support body 500 around the axis of the abutment rod 600. The U-shaped groove 521 has an arc shape along its depth direction and is parallel to the circumference of the abutment rod 600, making it easier for the adjusting member 800 to enter the U-shaped groove 521.

[0081] Optionally, the small-diameter section 810 of the adjusting member 800 can pass through the second disk 720 .

[0082] Specifically, the second plate 720 is provided with an avoidance hole, and the adjustment member 800 can be inserted into the avoidance hole. In this way, the support body 500 is connected to the positioning plate 700 through the adjustment member 800 to be positioned and thus maintain relative stability.

[0083] Furthermore, the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A spring force unloading tool, suitable for a compression spring cylinder (100), wherein the compression spring cylinder (100) comprises a first end face (101) and a second end face (102) opposite to each other in the axial direction, and is provided with a spring seat (110), a connecting rod (120) and an elastic member (130), wherein the spring seat (110) can slide in the axial direction in the compression spring cylinder (100), one end of the connecting rod (120) is in unidirectional contact with the spring seat (110) in the axial direction, and the other end can extend from the first end face (101), and the elastic member (130) enables the connecting rod (120) to always have a tendency to move toward the second end face (102) through the spring seat (110), characterized in that: The spring force unloading tool comprises: A support body (500), the support body (500) comprising an abutment portion (510), the abutment portion (510) being located in the compression spring cylinder (100) and between the second end surface (102) and the spring seat (110), so that the connecting rod (120) can be separated from the spring seat (110) in the axial direction; An abutting rod (600) passes through the second end surface (102) and is capable of abutting against the connecting rod (120) along the axial direction and allowing the other end of the connecting rod (120) to extend out of the first end surface (101).

2. The spring force unloading tool according to claim 1, characterized in that: It also includes a positioning disc (700), the positioning disc (700) is fixed to the second end surface (102), and the abutment rod (600) is threadedly connected to the positioning disc (700).

3. The spring force unloading tool according to claim 2, characterized in that: The positioning plate (700) includes a first plate body (710) and a second plate body (720), wherein the first plate body (710) is fixed to the second end surface (102), the second plate body (720) and the first plate body (710) are spaced and fixed along the axial direction, and the abutment rod (600) is threadedly connected to the second plate body (720).

4. The spring force unloading tool according to claim 3, characterized in that: The first disk body (710) and the second end surface (102) are fixed by threaded fasteners.

5. The spring force unloading tool according to claim 3, characterized in that: The support body (500) further includes an adjusting member (800), and the connecting portion (520) is fixedly connected to the abutting portion (510) and exposed outside the compression spring cylinder (100). One end of the adjusting member (800) is connected to the second end surface (102). The adjusting member (800) can drive the connecting portion (520) to move along the axial direction, so that one end surface of the abutting portion (510) abuts against the second end surface (102).

6. The spring force unloading tool according to claim 5, characterized in that: The adjusting member (800) is threadedly connected to the second end surface (102).

7. The spring force unloading tool according to claim 6, characterized in that: The adjusting member (800) is a stepped shaft, the small diameter section (810) of the adjusting member (800) can pass through the connecting portion (520) and is located on the side of the connecting portion (520) facing away from the second end surface (102), and the shaft shoulder (830) of the adjusting member (800) abuts against the connecting portion (520) along the axial direction.

8. The spring force unloading tool according to claim 7, characterized in that: The connecting portion (520) is provided with a U-shaped groove (521), an opening in the depth direction of the U-shaped groove (521) is formed on the end face of the connecting portion (520), and the depth direction of the U-shaped groove (521) is perpendicular to the axial direction, and a retaining edge (522) is provided on the end face of the U-shaped groove (521) facing away from the second end face (102), and the adjusting member (800) can enter the U-shaped groove (521) from the opening, and the shaft shoulder (830) of the adjusting member (800) abuts against the retaining edge (522) along the axial direction.

9. The spring force unloading tool according to claim 8, characterized in that: The depth direction of the U-shaped groove (521) is parallel to the circumferential direction of the abutting rod (600).

10. The spring force unloading tool according to claim 5, characterized in that: The small-diameter section (810) of the adjusting member (800) is capable of passing through the second disk body (720).

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