Tool for correcting installation state of spiral spring

Abstract

The utility model relates to a tool for correcting the installation state of a spiral spring, and solves the technical problems that in the prior art, when the installation state of the spiral spring is corrected, manual stirring through a crochet hook is low in efficiency and accuracy, and depends on experience of operators. The device comprises a supporting seat and a central shaft, the supporting base is a U-shaped piece with a groove, and through holes are symmetrically formed in the supporting arm. The central shaft is arranged in the two through holes in a penetrating manner; the central shaft in the groove is sequentially sleeved with a lining, two symmetrical card issuing clamping plates and a torsion spring between the card issuing clamping plates; the first card issuing clamping plate and the second card issuing clamping plate can rotate in a staggered mode with the center shaft as the axis. The two ends of the torsion spring abut against the upper ends of the two hairpin clamping plates respectively. The lower ends of the two hairpin clamping plates are close to the horizontal position of the spiral spring, and the distance between the two lower ends of the hairpin clamp is larger than the diameter of the spiral spring in the loosening state.

Description

Technical Field

[0001] The utility model relates to a resetting device for a spiral spring, in particular to a tool for correcting the installation state of a spiral spring, which is used for resetting the spiral spring in a transmission hydraulic control module. Background Art

[0002] Coil springs are a common component that utilizes the elasticity of a material. They deform when subjected to an external force and return to their original shape when the external force is removed. Coil springs are used in a wide range of applications, such as in the hydraulic control module of a transmission.

[0003] However, during assembly, the coil spring in the transmission hydraulic control module is easily deflected after being compressed to the specified position due to factors such as its own gravity or installation method, which interferes with the movement of the valve core and affects the performance and service life of the coil spring.

[0004] In the existing assembly process, due to the limited installation space in the hydraulic control valve plate of the transmission, the operator can only use a curved hook to move the coil spring to be corrected in the hydraulic control module to make it coincide with the central axis as much as possible. However, this correction method is inefficient and inaccurate, and the correction effect depends largely on the operator's personal experience and personal ability, and it cannot guarantee that the coil spring can be accurately restored to the desired state.

[0005] Chinese patent CN213917027U discloses a clamping mechanism for an automatic transmission return spring assembly, including a clamping mounting plate, on which are arranged two clamping matching arms that cooperate with each other for clamping an annular plate, a matching arm lifting device that drives the clamping matching arms to rise and fall, and a matching arm opening and closing driving device that drives the two clamping matching arms to open and close simultaneously is also arranged on the matching arm lifting device, and the two clamping matching arms are respectively installed on the matching arm opening and closing driving device; this patent mainly realizes the clamping function by controlling the automatic opening and closing of the two clamping matching arms, which can reduce manual labor intensity and improve production efficiency, but cannot correct the installation state of the coil spring in the transmission hydraulic control module. Utility Model Content

[0006] The utility model aims to solve the technical problems in the prior art of correcting the installation state of a coil spring by manual manipulation with a hook hook, which has low efficiency, low accuracy and reliance on the operator's experience, and to provide a tool for correcting the installation state of a coil spring.

[0007] In order to achieve the above purpose, the technical solutions provided by the utility model are as follows:

[0008] A tool for correcting the installation state of a coil spring, used for resetting the coil spring in a transmission hydraulic control module, has the following special features:

[0009] Including a support seat and a central axis;

[0010] The support seat is a U-shaped member including a connecting portion and two supporting arms. The two supporting arms are symmetrically provided with through holes that penetrate inside and outside. The area surrounded by the connecting portion and the two supporting arms constitutes a groove. The bottom surface of the support seat is used to cooperate and fix with the valve seat on which the coil spring to be corrected is installed.

[0011] The central axis passes through the two through holes;

[0012] A bushing and a hairpin are sequentially sleeved on the central axis in the groove along the axial direction, and the hairpin comprises a first hairpin clamping plate and a second hairpin clamping plate which can rotate alternately around the central axis;

[0013] Definition: The lower surface of the support seat is the horizontal surface, and its vertical surface is the vertical surface;

[0014] The upper end of the first hairpin clamp plate and the lower end of the second hairpin clamp plate are located on one side of the vertical plane passing through the central axis, and the lower end of the first hairpin clamp plate and the upper end of the second hairpin clamp plate are located on the other side of the vertical plane passing through the central axis;

[0015] Two ends of the torsion spring are respectively in contact with the upper end of the first hairpin clamp plate and the upper end of the second hairpin clamp plate, and are used to apply an outward thrust to the upper end of the first hairpin clamp plate and the upper end of the second hairpin clamp plate;

[0016] The length of the lower ends of the first hairpin clamp and the second hairpin clamp extending out of the bottom surface of the support seat is greater than the distance from the lower end of the coil spring to be corrected to the upper surface of the valve seat. In the loosened state, the distance between the two lower ends of the first hairpin clamp and the second hairpin clamp is greater than the diameter of the coil spring to be corrected.

[0017] Furthermore, the first hairpin clamp plate and the second hairpin clamp plate are two symmetrical hairpin clamp plates;

[0018] The hairpin splint includes a pinching ear, a central shaft sleeve, a bending section, and an annular claw which are sequentially connected from top to bottom;

[0019] The kneading ears are widened arc-shaped plates, the top ends of which are bent toward the vertical plane passing through the central axis, for facilitating kneading;

[0020] The central shaft sleeve is arranged at one side of the lower end of the kneading ear and is adapted to the central shaft 4;

[0021] The bent section is used to change the position of the ring claw so as to align it with the ring claw of another hairpin clamp plate to form an embracing state;

[0022] The degree of curvature of the annular claw is adapted to the helical spring to be corrected.

[0023] Furthermore, two limiting snap rings are included; and limiting grooves are respectively arranged at positions of the central axis corresponding to the outer sides of the through hole;

[0024] The two limiting snap rings are used to cooperate with the corresponding limiting grooves to limit the axial movement of the central shaft.

[0025] Furthermore, a pin hole is provided on the lower surface of the support seat, and a support pin is installed in the pin hole for cooperating and fixing with the valve plate hole on the valve seat.

[0026] Furthermore, the upper surface of the connecting portion of the support seat is a platform surface, and the horizontal height of the platform surface is lower than the height of the two supporting arms.

[0027] Furthermore, the platform surface and the upper surfaces of the two supporting arms are transitioned into sloped surfaces.

[0028] Furthermore, there are two support pins, which are respectively installed in the pin hole positions in the middle of the two support arms of the support seat by interference fit, forming a one-side two-pin type positioning with the lower surface of the support seat.

[0029] Furthermore, the central axis and the two through holes are clearance-fitted to facilitate assembly.

[0030] Furthermore, the central shaft is clearance-matched with the bushing, the first hairpin clamp, the torsion spring, and the second hairpin clamp.

[0031] Compared with the prior art, the utility model has the following beneficial effects:

[0032] 1. The utility model discloses a tool for correcting the installation state of a coil spring. Aiming at the problem of deflection that may occur when the coil spring is installed to a specified compression state in an environment with limited space, a hairpin clamp structure is designed. The ring claws are formed into an embracing state by manually pinching or automatically pinching the ears, so that the problem of the coil spring deviating from the central axis during installation can be corrected in a relatively small space, ensuring that the coil spring can be accurately aligned with the central axis after installation to meet the verticality requirement, thereby ensuring the normal operation of the spring in a given installation state and avoiding the influence on the performance and life of the coil spring. The tool provided by the utility model does not rely on the experience of the operator, is simple to operate, has high correction efficiency and high accuracy.

[0033] 2. The utility model provides a tool for correcting the installation state of a coil spring. By adjusting the relative positions of the bent section of a hairpin clamp and the annular claw, it is possible to adjust whether the annular claw is in an embracing state in a free state. By adjusting the structure between a center sleeve and the annular claw, it is possible to be compatible with valve seats of hydraulic control modules of different models, effectively correct the offset problem of the coil spring in different installation spaces, and ensure the accuracy and reliability of the installation of the coil spring.

[0034] 3. The utility model is a tooling for correcting the installation state of a coil spring, which adopts a "one-face two-pin" positioning method, that is, two support pins are arranged with interference fit in the pin holes in the middle of the support arm of the support seat to match the lower surface of the support seat, and the tooling is fixed with the surface of the valve seat, which has better stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A structural schematic diagram of an embodiment of a tooling for correcting the installation state of a spiral spring according to the utility model;

[0036] Figure 2 It is an exploded view of an embodiment of the utility model;

[0037] Figure 3 It is a schematic diagram of the installation state of the coil spring to be corrected when it is misaligned;

[0038] Figure 4 This is a schematic diagram of applying the embodiment of the utility model to correct the installation state of the coil spring;

[0039] Figure 5 yes Figure 4 Side view of

[0040] Figure 6 This is a schematic diagram of the structure of a hairpin in an embodiment of the utility model;

[0041] Figure 7 It is a structural schematic diagram of a support base in an embodiment of the utility model.

[0042] The reference numerals are as follows: 1-limiting clamp; 2-support seat, 201-through hole, 202-groove, 203-platform surface; 3-support pin; 4-center axis; 5-bushing; 6-first hairpin clamp; 7-torsion spring; 8-second hairpin clamp;

[0043] 11-pinching ear, 12-center sleeve, 13-bending section, 14-annular claw;

[0044] a-tighten the plug, b-coil spring, c-valve core, d-tool for correcting the installation state of the coil spring. DETAILED DESCRIPTION

[0045] The specific technical solutions in the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0046] The utility model is a tool for correcting the installation state of a spiral spring, which is a "hairpin-type" spring installation and reset tool. The assembly method is as follows Figure 2 As shown, in Figure 4 Marked as d.

[0047] See also Figure 1, a tool for correcting the installation state of a coil spring, used for resetting the coil spring in a transmission hydraulic control module, comprising a support seat 2 and a center shaft 4;

[0048] See also Figure 7 The support seat 2 is a U-shaped member, including a connecting portion and two supporting arms, the two supporting arms are symmetrically provided with through holes 201 that penetrate inside and outside, and the area surrounded by the connecting portion and the two supporting arms constitutes a groove 202;

[0049] The lower surface of the support seat 2 is provided with a pin hole at the middle position of the two support arms, and the two pin holes are respectively installed with interference fit support pins 3, which are used to cooperate and fix with the original valve plate holes on the valve seat, and form a one-side two-pin positioning with the lower surface of the support seat 2, and cooperate and fix with the valve seat surface where the coil spring to be corrected is installed;

[0050] The upper surface of the connecting part of the support seat 2 is a platform surface 203, and the horizontal height of the platform surface 203 is lower than the height of the two supporting arms; the platform surface 203 and the upper surfaces of the two supporting arms are transitioned into a slope surface; the lower platform surface 203 can make room for the two hairpin clamps to knead, which is convenient for personnel to operate; if the platform surface 203 is not provided, it is necessary to lengthen the upper ends of the two hairpin clamps for kneading to avoid interference with the upper surface of the support seat 2;

[0051] The center shaft 4 is passed through the two through holes 201, and is clearance-matched with the two through holes 201 to facilitate the assembly of the center shaft 4; two limiting grooves are respectively provided near the two ends of the center shaft 4, and limiting snap rings 1 are provided in the limiting grooves; the two limiting snap rings 1 are located on the outside of the through hole 201 away from the groove 202, and are used to cooperate with the corresponding limiting grooves to limit the axial movement of the center shaft 4.

[0052] On the central shaft 4 in the groove 202, a bushing 5, a first hairpin clamp 6, a torsion spring 7, and a second hairpin clamp 8 are sleeved in sequence along the axial direction; the first hairpin clamp 6, the torsion spring 7, and the second hairpin clamp 8 constitute a hairpin clamp, and the hairpin clamp can be pinched or loosened along the central shaft 4; the central shaft 4 and the bushing 5, the first hairpin clamp 6, the torsion spring 7, and the second hairpin clamp 8 are all clearance-fitted;

[0053] The length of the lower ends of the first hairpin clamp 6 and the second hairpin clamp 8 extending out of the bottom surface of the support seat 2 is greater than the distance from the lower end of the coil spring to be corrected to the upper surface of the valve seat. In the loosened state, the distance between the two lower ends of the hairpin clamp is greater than the diameter of the coil spring to be corrected.

[0054] See also Figure 6 In the present invention, the first hairpin clamping plate 6 and the second hairpin clamping plate 8 are two symmetrical hairpin clamping plates;

[0055] The hairpin splint includes a kneading ear 11, a central sleeve 12, a bending section 13, and an annular claw 14 which are sequentially connected from top to bottom;

[0056] The pinching ear 11 is a widened arc-shaped plate, the top of which is bent toward the vertical plane passing through the central axis 4, and is used for manual pinching or automatic pinching;

[0057] The central shaft sleeve 12 is arranged at one side of the lower end of the kneading ear 11, and the aperture thereof is adapted to the outer diameter of the central shaft 4;

[0058] The bent section 13 is used to avoid the interference between the hairpin clamp plate and the raised portion of the valve seat surface, and to change the position of the annular claw 14 so that it is aligned with the annular claw 14 of another hairpin clamp plate to form an embracing state;

[0059] The degree of curvature of the annular claw 14 is adapted to the helical spring to be corrected;

[0060] The two ends of the torsion spring 7 are respectively in contact with the inner sides of the pinching ears 11 of the two hairpin clamps, exerting a thrust toward the outside.

[0061] The first hairpin clamp plate 6 and the second hairpin clamp plate 8 should ensure that the annular claw 14 can clamp the spiral spring b when embracing, so the two annular claws 14 should be as close as possible to each other. Figure 5 In the same plane as shown, the bending structure 13 needs to be designed differently so that there is no interference between them, ensuring that the annular claw 14 can completely embrace the helical spring.

[0062] The hairpin clamp can ensure the ability to correct the axis position of the coil spring according to the installation axis position of the target coil spring by adjusting the relative distance and position between the center sleeve 12 and the annular claw 14, as well as the structure of the bending section 13, so that the tooling can adapt to and be compatible with valve seats of hydraulic control modules of different models, and effectively correct the offset problem of the coil spring in different installation spaces.

[0063] See also Figure 3-Figure 5 , the working principle of the utility model is as follows:

[0064] like Figure 3 As shown, when the transmission hydraulic control module is assembled, tightening the plug a causes the coil spring b to rotate and twist during the tightening process, causing it to deviate from the center axis. The deformation of the coil spring b causes the movement of the valve core c to be obstructed, affecting the pressure regulating function of the hydraulic control module.

[0065] The embodiment of the utility model is applied in the above scenario, and can correct the spiral spring b that deviates from the central axis to the correct position, ensuring that the movement process of the valve core c is not affected, specifically:

[0066] The support pin 3 in the helical spring installation reset tool d matches with the valve plate hole on the valve seat, and the bottom surface of the support seat 2 fits with the surface of the valve plate. The one-side two-pin positioning is adopted to ensure the positional relationship between the tool and the installed parts;

[0067] The first hairpin clamp 6 and the second hairpin clamp 8 are affected by the torsion spring 7, and the initial state of the annular claw 14 is "open" (i.e. Figure 5 The first hairpin clamp plate 6 and the second hairpin 8 rotate around the central axis 4 by manually pinching or automatically pinching the ears 11, and the annular claws 14 of the two clamp plates approach each other, and finally form an embracing state (i.e. Figure 5 dotted line position);

[0068] In this process, the annular claw 14 embraces the coil spring b, and the coil spring b is Figure 3 Status corrected to Figure 4 state, correcting the problem of coil spring b deviating from the center axis during installation.

[0069] The above description is only an embodiment of the utility model, and is not intended to limit the scope of protection of the utility model. Any equivalent structural transformation made by using the contents of the utility model specification and drawings, or directly or indirectly applied in other related technical fields, is included in the patent protection scope of the utility model. For ordinary technicians in this field, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A tool for correcting the installation state of a coil spring, characterized in that: It comprises a support seat (2) and a central axis (4); The support seat (2) is a U-shaped member including a connecting portion and two supporting arms, the two supporting arms are symmetrically provided with through holes (201) that penetrate inside and outside, and the area surrounded by the connecting portion and the two supporting arms constitutes a groove (202); the bottom surface of the support seat (2) is used to cooperate and fix with a valve seat on which a coil spring to be corrected is installed; The central axis (4) is inserted into the two through holes (201); A bushing (5) and a hairpin are sleeved in sequence along the axial direction on the central axis (4) in the groove (202), and the hairpin comprises a first hairpin clamp (6), a torsion spring (7), and a second hairpin clamp (8); the first hairpin clamp (6) and the second hairpin clamp (8) are capable of rotating alternately with the central axis (4) as the axis; Definition: The lower surface of the support seat (2) is a horizontal surface, and its vertical surface is a vertical surface; The upper end of the first hairpin clamp (6) and the lower end of the second hairpin clamp (8) are located on one side of a vertical plane passing through the central axis (4), and the lower end of the first hairpin clamp (6) and the upper end of the second hairpin clamp (8) are located on the other side of the vertical plane passing through the central axis (4); The two ends of the torsion spring (7) are respectively in contact with the upper end of the first hairpin clamp (6) and the upper end of the second hairpin clamp (8), so as to apply an outward thrust to the upper end of the first hairpin clamp (6) and the upper end of the second hairpin clamp (8); The length of the lower ends of the first hairpin clamp (6) and the second hairpin clamp (8) extending out of the bottom surface of the support seat (2) is greater than the distance from the lower end of the coil spring to be corrected to the upper surface of the valve seat, and in the loosened state, the distance between the two lower ends of the first hairpin clamp (6) and the second hairpin clamp (8) is greater than the diameter of the coil spring to be corrected.

2. A tool for correcting the installation state of a coil spring according to claim 1, characterized in that: The first hairpin clamp plate (6) and the second hairpin clamp plate (8) are two symmetrical hairpin clamp plates; The hairpin clamp plate comprises a kneading ear (11), a central shaft sleeve (12), a bending section (13), and an annular claw (14) which are sequentially connected from top to bottom; The kneading ear (11) is a widened arc-shaped plate, the top end of which is bent toward the vertical plane passing through the central axis (4); The central shaft sleeve (12) is arranged at one side of the lower end of the kneading ear (11) and is adapted to the central shaft (4); The bending section (13) is used to change the position of the annular claw (14) so ​​as to align it with the annular claw (14) of another hairpin clamp plate to form an embracing state; The bending degree of the annular claw (14) is adapted to the helical spring to be corrected.

3. A tool for correcting the installation state of a coil spring according to claim 2, characterized in that: It also includes two limit clamps (1); The central axis (4) is provided with limiting grooves at positions corresponding to the outer sides of the through holes (201); The two limiting clamping rings (1) are used to cooperate with corresponding limiting grooves to limit the axial movement of the central shaft (4).

4. A tool for correcting the installation state of a coil spring according to claim 3, characterized in that: The lower surface of the support seat (2) is provided with a pin hole, in which a support pin (3) is installed for cooperating and fixing with a valve plate hole on the valve seat.

5. A tool for correcting the installation state of a coil spring according to claim 4, characterized in that: The upper surface of the connection portion of the support seat (2) is a platform surface (203), and the horizontal height of the platform surface (203) is lower than the height of the two supporting arms.

6. A tool for correcting the installation state of a coil spring according to claim 5, characterized in that: The platform surface (203) and the upper surfaces of the two supporting arms are transitioned into sloped surfaces.

7. A tool for correcting the installation state of a coil spring according to claim 6, characterized in that: There are two support pins (3), which are respectively installed in the pin holes in the middle of the two support arms of the support seat (2) by interference fit, and are positioned with the lower surface of the support seat (2).

8. A tool for correcting the installation state of a coil spring according to claim 7, characterized in that: The central axis (4) and the two through holes (201) are clearance-fitted.

9. A tool for correcting the installation state of a coil spring according to claim 8, characterized in that: The central shaft (4) is clearance-matched with the bushing (5), the first hairpin clamp (6), the torsion spring (7), and the second hairpin clamp (8).

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