Spring compression installation tool

Abstract

The application provides a spring compression installation tool, which comprises a pull cable and a driving shaft assembly; the pull cable is used to pass through a spring to be compressed, and two ends of the pull cable are connected with the driving shaft assembly respectively; the driving shaft assembly is configured to rotate around its own axis, and drives the pull cable to wind on it to compress the spring. In this way, the spring can be compressed without being limited by the spring installation environment, so as to facilitate the spring installation, by means of the pull cable passing through the spring to be compressed and the driving shaft assembly winding the pull cable. In addition, the pull cable can simultaneously control the contraction from the symmetrical sides of the spring to compress the spring, so that the inconsistency of the pressure on both sides of the spring during the compression process can be avoided, and the spring can be compressed in a balanced manner. Further, the compression amount of the spring can be adjusted and set by adjusting the rotation angle of the driving shaft assembly, so that the set pre-tightening force can be achieved.

Description

Technical Field

[0001] This invention relates to the field of mechanical assembly technology, and in particular to a spring compression installation tool. Background Technology

[0002] For high-stiffness springs, such as mold springs, their high rigidity makes it difficult to compress them to the set preload force by hand during installation. Currently, spring compression and assembly are typically done on a vise or using a press. However, in some confined installation environments or those with many parts, it's impossible to use these devices to compress the springs. In particular, in some applications where the spring is mounted on a shaft, it's difficult to compress and install the spring using tools. Summary of the Invention

[0003] The purpose of this invention is to provide a spring compression installation tool to solve the problem that existing springs are difficult to compress and assemble mechanically in special installation environments.

[0004] To solve the above-mentioned technical problems, the present invention provides a spring compression installation tool, which includes: a cable and a drive shaft assembly;

[0005] The cable is used to pass through the spring to be compressed, and the two ends of the cable are respectively connected to the drive shaft assembly; the drive shaft assembly is configured to rotate about its own axis to drive the cable to be wound around it to compress the spring.

[0006] Optionally, the spring compression mounting tool further includes a housing, and the drive shaft assembly includes a first shaft and a second shaft arranged coaxially, with the first shaft located inside the housing; one end of the cable is fixed to the first shaft, and the other end of the cable passes through the housing and through the spring to be compressed, and is detachably connected to the second shaft; the second shaft switches between a pop-out position and a retracted position along the axial direction of the drive shaft assembly;

[0007] When the second shaft is in the pop-out position, at least a portion of the second shaft extends out of the housing for connection to the cable.

[0008] When the second shaft is in the retracted position, the connection between the cable and the second shaft is located inside the housing.

[0009] Optionally, the second axis is configured to switch between the pop-up position and the retracted position.

[0010] Optionally, the drive shaft assembly includes a third shaft and a moving block;

[0011] The movable block is fixedly connected to the outer peripheral wall of the second shaft, the third shaft is coaxially connected to the first shaft, and the second shaft is movably inserted through the third shaft;

[0012] The third shaft has a first limiting hole and a second limiting hole opened along the axial direction. One end of the first limiting hole and the second limiting hole are open, and the depth of the first limiting hole along the axial direction is greater than the depth of the second limiting hole along the axial direction. The first limiting hole and the second limiting hole allow the moving block to pass through from the open end.

[0013] The movable block is configured to selectively insert into the first limiting hole or the second limiting hole, wherein when the movable block is inserted into the first limiting hole and abuts against the bottom of the first limiting hole, the second shaft is in the pop-out position; when the movable block is inserted into the second limiting hole and abuts against the bottom of the second limiting hole, the second shaft is in the retracted position.

[0014] Optionally, the drive shaft assembly further includes a fourth shaft.

[0015] The fourth shaft is coaxially connected to the first shaft, and the fourth shaft has at least two guide slopes facing the third shaft; the first limiting hole and the second limiting hole correspond to different guide slopes in the circumferential direction;

[0016] The movable block is configured such that, as the second shaft moves toward the guide slope, it disengages from one of the first limiting hole and the second limiting hole, abuts against the guide slope, and rotates around the axis of the fourth shaft under the guidance of the guide slope; then, as the second shaft moves away from the guide slope, it passes through the other of the first limiting hole and the second limiting hole.

[0017] Optionally, the drive shaft assembly includes at least two blocking ramps disposed on the third shaft and facing the fourth shaft;

[0018] The blocking inclined surface corresponds to different guiding inclined surfaces in the axial direction. The blocking inclined surface is used to abut against the moving block when the moving block moves away from the guiding inclined surface with the second shaft, and guide the moving block to be axially aligned with the first limiting hole or the second limiting hole.

[0019] Optionally, the drive shaft assembly includes at least two first limiting holes, at least two second limiting holes, at least two moving blocks, at least four guide ramps, and at least four blocking ramps; at least two moving blocks are evenly distributed around the second shaft in the circumferential direction, and the first limiting holes and second limiting holes are alternately and evenly arranged around the axis of the third shaft in the circumferential direction; at least four blocking ramps are evenly arranged around the axis of the third shaft in the circumferential direction, and at least four guide ramps are evenly arranged around the axis of the fourth shaft in the circumferential direction.

[0020] Optionally, the fourth axis has a rotation-limiting surface;

[0021] When the moving block rotates around the axis of the fourth shaft to a circumferential position corresponding to the first or second limiting hole under the guidance of the guide slope, the limiting surface is configured to abut against the moving block to prevent the second shaft from continuing to rotate.

[0022] Optionally, the drive shaft assembly includes a potential energy element for applying a potential force to the second shaft in a direction away from the fourth shaft.

[0023] Optionally, the drive shaft assembly includes a tether bolt disposed at one end of the second shaft extending out of the housing, the tether bolt being used for detachably connecting the cable.

[0024] Optionally, the spring compression mounting tool further includes a fifth shaft, which is coaxially connected to the end of the first shaft away from the second shaft; the end of the fifth shaft away from the first shaft extends out of the housing for inputting power.

[0025] In summary, the spring compression installation tool provided by the present invention includes: a cable and a drive shaft assembly; the cable is used to pass through the spring to be compressed, and both ends of the cable are respectively connected to the drive shaft assembly; the drive shaft assembly is configured to rotate about its own axis to drive the cable to be wound around it to compress the spring.

[0026] This configuration, where a cable passes through the spring to be compressed and is then wound around by the drive shaft assembly, allows for spring compression regardless of the installation environment, facilitating spring installation. Furthermore, controlling the simultaneous contraction of the cable from both symmetrical sides of the spring during compression avoids uneven pressure on both sides, promoting balanced spring compression. Moreover, by adjusting the rotation angle of the drive shaft assembly, the amount of spring compression can be adjusted and set to achieve the desired preload. Attached Figure Description

[0027] Those skilled in the art will understand that the accompanying drawings are provided to better understand the invention and do not constitute any limitation on the scope of the invention. Wherein:

[0028] Figure 1 This is a schematic diagram of a spring compression installation tool according to an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the drive shaft assembly according to an embodiment of the present invention;

[0030] Figure 3 This is a side view of the drive shaft assembly according to an embodiment of the present invention, wherein the first shaft body has been removed;

[0031] Figure 4 This is a schematic diagram of a drive shaft assembly according to an embodiment of the present invention, wherein the first shaft body has been removed;

[0032] Figure 5 This is a schematic diagram of the fourth axis in an embodiment of the present invention;

[0033] Figure 6 This is a bottom view of the third axis of an embodiment of the present invention;

[0034] Figures 7-9 This is a schematic diagram of the drive shaft assembly in an embodiment of the present invention switching between the pop-out position and the retracted position;

[0035] Figure 10 This is a partial side view of the second axis body according to an embodiment of the present invention;

[0036] Figure 11 This is a partial top view of the second axis in an embodiment of the present invention.

[0037] In the attached image:

[0038] 1-Drive shaft assembly; 11-First shaft; 12-Second shaft; 121-Tether; 122-Guide groove; 13-Third shaft; 130-End face; 131-First limiting hole; 132-Second limiting hole; 14-Fourth shaft; 141-Guiding ramp; 142-Rotation limiting surface; 15-Moving block; 16-Blocking ramp; 17-Potential energy component; 18-Fifth shaft; 2-Cable; 3-Housing; 31-Through groove; 91-Spring; 92-Shaft; 93-Other structural components. Detailed Implementation

[0039] To make the objectives, advantages, and features of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to facilitate and clarify the explanation of the embodiments of this invention. Furthermore, the structures shown in the drawings are often part of the actual structures. In particular, different figures may emphasize different aspects and may sometimes use different scales.

[0040] As used in this invention, the singular forms “a,” “an,” and “the” include plural objects; the term “or” is generally used to mean “and / or”; the term “a number” is generally used to mean “at least one”; and the term “at least two” is generally used to mean “two or more”. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature; “one end” and “the other end,” and “proximal end” and “distal end” generally refer to two corresponding parts, which include not only endpoints. Furthermore, the terms "installed," "connected," and "attached," as used in this invention, and the term "set" on one element from another, should be interpreted broadly. They generally only indicate a connection, coupling, cooperation, or transmission relationship between the two elements, which can be direct or indirect through an intermediate element. They should not be construed as indicating or implying a spatial relationship between the two elements, meaning one element can be located inside, outside, above, below, or to one side of another element, unless otherwise explicitly stated. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances. Additionally, directional terms such as above, below, up, down, upward, downward, left, and right are used relative to exemplary embodiments as shown in the figures, with upward or upper directions pointing towards the top of the corresponding figure, and downward or lower directions pointing towards the bottom of the corresponding figure.

[0041] The purpose of this invention is to provide a spring compression installation tool to solve the problem that existing springs are difficult to compress and assemble mechanically in special installation environments. The following description refers to the accompanying drawings.

[0042] Please refer to Figure 1 This illustrates an embodiment of the spring compression mounting tool provided by the present invention and its application scenarios. Figure 1In the illustrated demonstration application scenario, the spring 91 to be compressed is mounted on a shaft 92, and other structural components 93 exist around the spring 91, making it difficult to directly compress it using instruments such as vises or presses. The spring compression installation tool provided in this embodiment includes a cable 2 and a drive shaft assembly 1; the cable 2 passes through the spring 91 to be compressed, and its two ends are respectively connected to the drive shaft assembly 1; the drive shaft assembly 1 is configured to rotate around its own axis A, driving the cable 2 to wind around it to compress the spring 91.

[0043] This configuration, where the cable 2 passes through the spring 91 to be compressed and is then wound around the cable 2 using the drive shaft assembly 1, allows for compression of the spring 91 regardless of its installation environment, facilitating its installation. Furthermore, the simultaneous controlled contraction of the cable 2 from both symmetrical sides of the spring 91 prevents uneven pressure on both sides during compression, promoting balanced compression. Moreover, by adjusting the rotation angle of the drive shaft assembly 1, the compression amount of the spring 91 can be adjusted and set to achieve the desired preload.

[0044] For further details, please refer to... Figure 1 and Figure 2 The spring compression installation tool also includes a housing 3. The drive shaft assembly 1 includes a first shaft 11 and a second shaft 12 arranged coaxially (the axis of the first shaft 11 is the axis A of the drive shaft assembly 1). The first shaft 11 is located inside the housing 3. One end of the cable 2 is fixed to the first shaft 11, and the other end of the cable 2 passes through the housing 3 and through the spring 91 to be compressed, and is detachably connected to the second shaft 12. The second shaft 12 switches between a pop-out position and a retracted position along the axial direction of the drive shaft assembly 1. When the second shaft 12 is in the pop-out position, at least a portion of the second shaft 12 extends out of the housing 3 for connection by the cable 2. When the second shaft 12 is in the retracted position, the connection between the cable 2 and the second shaft 12 is located inside the housing 3.

[0045] To improve safety and ease of use, this embodiment includes a housing 3 to enclose the portion of the drive shaft assembly 1 around the cable 2. Please refer to... Figure 1 In practical applications, the housing 3 can abut against other structural components 93. At this time, the housing 3 can also serve as a support point for compressing the spring 91, assisting in the winding of the drive shaft assembly 1. Optionally, the housing 3 has a through groove 31 for the cable 2 to pass through, and the through groove 31 has a certain extension length along the axial direction of the drive shaft assembly 1 to accommodate the axial change of the cable 2 along the drive shaft assembly 1 caused by the compression stroke of the spring 91.

[0046] The inventors discovered that in some application scenarios, the installation space around the spring 91 is very narrow or there are many assembly parts. The cable 2 needs to be threaded through after the spring 91 is roughly installed. Therefore, one end of the cable 2 must be configured to be detachably connected to the drive shaft assembly 1 to facilitate its passage through the spring 91. For ease of description, the end of the cable 2 fixed to the first shaft 11 is referred to as the fixed end, and the end connecting the cable 2 to the second shaft 12 is referred to as the mounting end. After passing through the spring 91, the mounting end of the cable 2 connects to the drive shaft assembly 1. At this point, the drive shaft assembly 1 needs to extend out of the housing 3 for easy connection. After completing the connection between the mounting end of the cable 2 and the drive shaft assembly 1, it is preferable to retract the connection between the drive shaft assembly 1 and the cable 2 into the housing 3 before winding the drive shaft assembly 1 to further improve safety. Furthermore, after the spring 91 is compressed, the mounting ends of the drive shaft assembly 1 and the cable 2 can be pushed out of the housing 3, the mounting ends of the cable 2 can be separated from the drive shaft assembly 1, and then the cable 2 can be removed from the spring 91.

[0047] Based on the above analysis and research, in this embodiment, the second shaft 12 is configured to switch between a pop-out position and a retracted position along the axial direction of the drive shaft assembly 1, thereby adapting to the installation and separation of the mounting end of the cable 2, and the two stages of the drive shaft assembly 1 winding the cable 2. It should be noted that when the second shaft 12 is in the retracted position, the connection between the cable 2 and the second shaft 12 is located inside the housing 3. At this time, the connection between the cable 2 and the second shaft 12 refers to all sections of the cable 2 that are in contact with the second shaft 12. For example, if the cable 2 may be wound around the second shaft 12 several times, all of these wound turns should be within the housing 3.

[0048] Understandably, there can be multiple ways for the second shaft 12 to switch between the pop-up position and the retracted position. In an alternative embodiment, the second shaft 12 is configured to switch between the pop-up position and the retracted position under axial pressing drive. The pressing drive method allows for convenient switching of the second shaft 12 between the pop-up position and the retracted position.

[0049] The following is combined with Figures 3 to 9 An example of drive shaft assembly 1 will be described.

[0050] The drive shaft assembly 1 includes a third shaft 13 and a moving block 15; the moving block 15 is fixedly connected to the outer peripheral wall of the second shaft 12. The third shaft 13 is coaxially connected to the first shaft 11; the second shaft 12 is movably inserted through the third shaft 13. The third shaft 13 has a first limiting hole 131 and a second limiting hole 132 opened along the axial direction. One end of the first limiting hole 131 and the second limiting hole 132 is open, and the axial depth of the first limiting hole 131 is greater than the axial depth of the second limiting hole 132. The first limiting hole 131 and the second limiting hole 132 allow the moving block 15 to pass through from the open end. The moving block 15 is configured to selectively insert into the first limiting hole 131 or the second limiting hole 132. When the moving block 15 passes through the first limiting hole 131 and abuts against the bottom of the first limiting hole 131, the second shaft 12 is in the pop-out position. When the moving block 15 passes through the second limiting hole 132 and abuts against the bottom of the second limiting hole 132, the second shaft 12 is in the retracted position.

[0051] Preferably, the drive shaft assembly 1 further includes a fourth shaft 14, which is coaxially connected to the first shaft 11. The fourth shaft 14 has at least two guide ramps 141 facing the third shaft 13. The first limiting hole 131 and the second limiting hole 132 correspond to different guide ramps 141 in the circumferential direction. The moving block 15 is configured to move away from one of the first limiting hole 131 and the second limiting hole 132 as the second shaft 12 moves toward the guide ramp 141. After the moving block 15 abuts against the guide ramp 141, the moving block 15 rotates around the axis of the fourth shaft 14 under the guidance of the guide ramp 141. Then, as the second shaft 12 moves away from the guide ramp 141, it passes into the other of the first limiting hole 131 and the second limiting hole 132.

[0052] The following is combined with Figures 3 to 6The following description is provided. Optionally, the first shaft 11 is a hollow cylindrical component, and the fourth shaft 14 is housed within it. Preferably, the fourth shaft 14 is coaxially welded and fixed to the first shaft 11. The third shaft 13 is a cylinder, and its outer diameter is preferably the same as that of the first shaft 11. The third shaft 13 and the first shaft 11 are coaxially fixed together by means of a pin hole or threaded connection. Further, the third shaft 13 has a through hole at its center, the inner diameter of which is adapted to the outer diameter of the second shaft 12 (for example, the inner diameter of the through hole is slightly larger than the outer diameter of the second shaft 12). The second shaft 12 can rotate and move axially within the through hole, but the radial position of the second shaft 12 is restricted by the through hole. It can be understood that, in this case, the first shaft 11, the second shaft 12, the third shaft 13, and the fourth shaft 14 are coaxial.

[0053] The movable block 15 is disposed on the outer peripheral wall of the second shaft 12, protruding from the outer peripheral wall of the second shaft 12. Correspondingly, the third shaft 13 has a first limiting hole 131 and a second limiting hole 132 at one end facing the fourth shaft 14. The cross-sectional shape of the first limiting hole 131 and the second limiting hole 132 can be adapted to the cross-sectional shape of the movable block 15 to allow the movable block 15 to be inserted. It can be understood that after the movable block 15 is inserted into the first limiting hole 131 or the second limiting hole 132, the second shaft 12 and the third shaft 13 are configured to be circumferentially locked. At this time, when the first shaft 11 rotates, it will drive the second shaft 12 to rotate together, and simultaneously wind the two ends of the cable 2.

[0054] Optionally, the end face 130 of the third shaft 13 facing the fourth shaft 14 is a plane, and the openings of the first limiting hole 131 and the second limiting hole 132 are both located on this end face 130. The axial depth of the first limiting hole 131 being greater than the axial depth of the second limiting hole 132 means that the axial distance between the bottom of the first limiting hole 131 (i.e., the bottom surface away from the end face 130) and the end face 130 is greater than the axial distance between the bottom of the second limiting hole 132 and the end face 130. Therefore, it can be understood that since the axial positions of the first shaft 11, the third shaft 13, and the fourth shaft 14 are fixed, the deeper the moving block 15 is inserted into the third shaft 13, the further away it is from the fourth shaft 14. Therefore, when the movable block 15 is inserted into the first limiting hole 131 and abuts against the bottom of the first limiting hole 131, the second shaft 12 is further away from the fourth shaft 14 than when the movable block 15 is inserted into the second limiting hole 132 and abuts against the bottom of the second limiting hole 132. The position of the second shaft 12 when the movable block 15 is inserted into the first limiting hole 131 and abuts against the bottom of the first limiting hole 131 is called the pop-out position; conversely, the position of the second shaft 12 when the movable block 15 is inserted into the second limiting hole 132 and abuts against the bottom of the second limiting hole 132 is called the retracted position. Furthermore, when the second shaft 12 is in the pop-out position, a portion of it that is away from the fourth shaft 14 can extend out of the housing 3.

[0055] Please refer to Figure 5 The guide ramp 141 gradually descends circumferentially around the axis of the fourth shaft 14, forming a ramp surface. When the second shaft 12 is pressed and moves towards the fourth shaft 14, the moving block 15 moves towards the guide ramp 141 along with the second shaft 12. When it abuts against the guide ramp 141, the moving block 15 should have exited from the first limiting hole 131 or the second limiting hole 132 and is no longer circumferentially restricted by the third shaft 13. Thus, after the moving block 15 abuts against the guide ramp 141, when the second shaft 12 is pressed further, the circumferential component of the guide ramp 141 will guide the moving block 15 to rotate circumferentially. Understandably, this also causes the second shaft 12 to rotate together, thereby aligning circumferentially with the next first limiting hole 131 or second limiting hole 132. That is, if the movable block 15 was originally inserted into one of the first limiting hole 131 and the second limiting hole 132, then after the second shaft 12 rotates, it will be inserted into the other of the first limiting hole 131 and the second limiting hole 132. Furthermore, the second shaft 12 is driven to move away from the fourth shaft 14, causing the movable block 15 to be inserted into the other of the first limiting hole 131 and the second limiting hole 132. This achieves the switching of the movable block 15 between the first limiting hole 131 and the second limiting hole 132, and also achieves the switching of the second shaft 12 between the pop-out position and the retracted position.

[0056] Optionally, the fourth shaft 14 has a rotation-limiting surface 142; when the moving block 15 rotates around the axis of the fourth shaft 14 under the guidance of the guide ramp 141 to a circumferential position corresponding to the first limiting hole 131 or the second limiting hole 132, the rotation-limiting surface 142 is configured to abut against the moving block 15 to prevent the second shaft 12 from continuing to rotate. In one example, the rotation-limiting surface 142 extends axially along the fourth shaft 14 and is located at the lowest point of the guide ramp 141, facing the guide ramp 141. After pressing the second shaft 12 to make the moving block 15 abut against the guide ramp 141, continuing to press the second shaft 12 will cause the circumferential component of the force of the guide ramp 141 to guide the moving block 15 to rotate circumferentially until the moving block 15 abuts against the rotation-limiting surface 142, at which point pressing will no longer be able to drive the second shaft 12 to continue moving. It should be noted that when the moving block 15 rotates around the axis to the circumferential position corresponding to the first limiting hole 131 or the second limiting hole 132, it means that the moving block 15 is roughly aligned with the first limiting hole 131 or the second limiting hole 132 in the axial direction.

[0057] Preferably, the drive shaft assembly 1 includes at least two blocking inclined surfaces 16, which are disposed on the third shaft 13 and face the fourth shaft 14. Each blocking inclined surface 16 corresponds axially to a different guide inclined surface 141. The blocking inclined surface 16 abuts against the moving block 15 as it moves away from the guide inclined surface 141 along with the second shaft 12, guiding the moving block 15 to axially align with the first limiting hole 131 or the second limiting hole 132. Theoretically, if the position of the limiting surface 142 allows the moving block 15 to accurately align axially with the first limiting hole 131 or the second limiting hole 132, the blocking inclined surface 16 may not be necessary. However, in practice, when the second shaft 12 moves away from the fourth shaft 14, a certain circumferential wobble may occur, causing the moving block 15 to fail to smoothly engage with the first limiting hole 131 or the second limiting hole 132. The blocking ramp 16 effectively avoids this problem. As long as the moving block 15 is approximately aligned with the first limiting hole 131 or the second limiting hole 132, when the second shaft 12 moves away from the fourth shaft 14, the moving block 15 will abut against the blocking ramp 16 and be guided by it to slide into the first limiting hole 131 or the second limiting hole 132. The blocking ramp 16 can, for example, be provided on a protrusion on the end face 130. The number of blocking ramps 16 matches the total number of the first limiting holes 131 and the second limiting holes 132, with one blocking ramp 16 corresponding to each first limiting hole 131 and each second limiting hole 132.

[0058] Furthermore, due to the arrangement of the blocking ramp 16, the first limiting hole 131 and the second limiting hole 132, while extending axially, need to adaptably extend or expand circumferentially to accommodate the moving block 15 rotating while moving axially into the machine. Optionally, to reduce resistance, in one example, the end of the moving block 15 facing the fourth shaft 14 is configured as a ramp or arc surface adapted to the guide ramp 141.

[0059] Preferably, the drive shaft assembly 1 includes a potential energy element 17, which applies a potential force to the second shaft 12 in a direction away from the fourth shaft 14. In one example, the potential energy element 17 may be an elastic component, such as a spring, capable of providing elastic potential energy. Optionally, one end of the elastic component is connected to the fourth shaft 14, and the other end is connected to the second shaft 12, and the elastic component is preferably in a compressed state. In other embodiments, the potential energy element 17 may also be a structure such as a magnet, capable of providing magnetic potential energy. Those skilled in the art can understand and configure it according to the prior art, and the present invention does not limit the specific structure of the potential energy element 17. Under the push of the potential energy element 17, the second shaft 12 will be at its farthest position away from the fourth shaft 14, and the moving block 15 will abut against the bottom of the first limiting hole 131 or the bottom of the second limiting hole 132, that is, the second shaft 12 is in a pop-out position or a retracted position. The operator can overcome the potential energy of the potential energy component 17 by pressing the second axis 12 and then releasing it, which can switch the position of the second axis 12. The switching process is very convenient.

[0060] In one example, the drive shaft assembly 1 includes at least two first limiting holes 131, at least two second limiting holes 132, at least two moving blocks 15, at least four guide ramps 141, and at least four blocking ramps 16; at least two moving blocks 15 are evenly distributed circumferentially around the second shaft body 12, and the first limiting holes 131 and second limiting holes 132 are alternately and evenly arranged circumferentially around the axis of the third shaft body 13 (i.e., adjacent first limiting holes 131 and second limiting holes 132 are spaced apart circumferentially, such as...). Figure 6 (As shown); at least four of the blocking ramps 16 are evenly arranged circumferentially around the axis of the third shaft 13, and at least four of the guiding ramps 141 are evenly arranged circumferentially around the axis of the fourth shaft 14, as shown. Figure 5 As shown.

[0061] The following is combined with Figures 7 to 9 The process of switching the second axis 12 between the pop-up position and the retracted position is explained.

[0062] like Figure 7 As shown, the second shaft 12 is in the retracted position, and the moving block 15 is located in the second limiting hole 132 and abuts against the bottom of the second limiting hole 132. Pressing the second shaft 12 causes the second shaft 12 to move the moving block 15 together toward the direction of the fourth shaft 14. Figure 7 (The lower part of the middle) moves. After the moving block 15 abuts against the guide slope 141, continue pressing the second shaft 12. Under the guidance of the guide slope 141, the moving block 15 rotates circumferentially until it abuts against the rotation limit surface 142, as shown. Figure 8 As shown.

[0063] At this point, the second shaft 12 is released, and driven by the potential energy element 17, the second shaft 12 moves away from the fourth shaft 14 until the moving block 15 abuts against the blocking inclined surface 16. Figure 9 As shown.

[0064] Continue to relax the second shaft 12. Driven by the potential energy element 17 and guided by the blocking inclined surface 16, the second shaft 12 slides into the first limiting hole 131 until the moving block 15 abuts against the bottom of the first limiting hole 131, at which point the second shaft 12 reaches the pop-out position.

[0065] Understandably, when the second shaft 12 is pressed again, the moving block 15 will exit from the first limiting hole 131 and rotate to the next second limiting hole 132. Releasing the second shaft 12 will cause the moving block 15 to engage in the next second limiting hole 132, thus changing from the pop-up position to the retracted position.

[0066] Please refer to Figure 10 and Figure 11 Optionally, the drive shaft assembly 1 includes a tether 121, which is disposed at one end of the second shaft 12 extending out of the housing 3. The tether 121 is used for detachably connecting the cable 2. The tether 121 can be used to secure the cable 2 thereto. Preferably, the second shaft 12 also has a guide groove 122, which is used to guide and change the direction of the cable 2 so that when the second shaft 12 is in the retracted position, the cable 2 can be wound around the second shaft 12.

[0067] Optional, please refer to Figure 1 and Figure 2 The spring compression installation tool further includes a fifth shaft 18, which is coaxially connected to the end of the first shaft 11 away from the second shaft 12. The end of the fifth shaft 18 away from the first shaft 11 extends out of the housing 3 for inputting power. The fifth shaft 18 can be connected to a power output component such as a motor, or to other rotating structures. The power here can be the power output by the motor or the power manually driven by the operator; this invention is not limited in this respect.

[0068] In summary, the spring compression installation tool provided by this invention includes a cable and a drive shaft assembly. The cable passes through the spring to be compressed, and both ends of the cable are connected to the drive shaft assembly. The drive shaft assembly is configured to rotate around its own axis, driving the cable to wind around it to compress the spring. This configuration, by passing the cable through the spring to be compressed and then using the drive shaft assembly to wind the cable, allows for spring compression regardless of the spring installation environment, facilitating spring installation. Furthermore, controlling the simultaneous contraction of the cable from both symmetrical sides of the spring to compress it avoids inconsistent pressure on both sides during compression, promoting balanced spring compression. Moreover, by adjusting the rotation angle of the drive shaft assembly, the compression amount of the spring can be adjusted and set to achieve the desired preload.

[0069] It should be noted that the above embodiments can be combined with each other. The above description is only a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A spring compression installation tool, characterized in that, include: Cables, drive shaft assembly, and housing; The cable is used to pass through the spring to be compressed, and the two ends of the cable are respectively connected to the drive shaft assembly; The drive shaft assembly is configured to rotate about its own axis, causing the cable to be wound around it to compress the spring; The drive shaft assembly includes a first shaft and a second shaft arranged coaxially, the first shaft being located within the housing; one end of the cable is fixed to the first shaft, and the other end of the cable passes through the housing and through a spring to be compressed, and is detachably connected to the second shaft; the second shaft switches between a pop-out position and a retracted position along the axial direction of the drive shaft assembly; When the second shaft is in the pop-out position, at least a portion of the second shaft extends out of the housing for connection to the cable. When the second shaft is in the retracted position, the connection between the cable and the second shaft is located inside the housing.

2. The spring compression installation tool according to claim 1, characterized in that, The second shaft is configured to switch between the pop-out position and the retracted position.

3. The spring compression installation tool according to claim 2, characterized in that, The drive shaft assembly includes a third shaft and a moving block; The movable block is fixedly connected to the outer peripheral wall of the second shaft, the third shaft is coaxially connected to the first shaft, and the second shaft is movably inserted through the third shaft; The third shaft has a first limiting hole and a second limiting hole opened along the axial direction. One end of the first limiting hole and the second limiting hole are open, and the depth of the first limiting hole along the axial direction is greater than the depth of the second limiting hole along the axial direction. The first limiting hole and the second limiting hole allow the moving block to pass through from the open end. The movable block is configured to selectively insert into the first limiting hole or the second limiting hole, wherein when the movable block is inserted into the first limiting hole and abuts against the bottom of the first limiting hole, the second shaft is in the pop-out position; when the movable block is inserted into the second limiting hole and abuts against the bottom of the second limiting hole, the second shaft is in the retracted position.

4. The spring compression installation tool according to claim 3, characterized in that, The drive shaft assembly also includes a fourth shaft. The fourth shaft is coaxially connected to the first shaft, and the fourth shaft has at least two guide slopes facing the third shaft; the first limiting hole and the second limiting hole correspond to different guide slopes in the circumferential direction; The movable block is configured such that, as the second shaft moves toward the guide slope, it disengages from one of the first limiting hole and the second limiting hole. After the movable block abuts against the guide slope, it rotates around the axis of the fourth shaft under the guidance of the guide slope. Then, as the second shaft moves away from the guide slope, it passes through the other of the first limiting hole and the second limiting hole.

5. The spring compression installation tool according to claim 4, characterized in that, The drive shaft assembly includes at least two blocking ramps disposed on the third shaft and facing the fourth shaft; The blocking inclined surface corresponds to different guiding inclined surfaces in the axial direction. The blocking inclined surface is used to abut against the moving block when the moving block moves away from the guiding inclined surface with the second shaft, and guide the moving block to be axially aligned with the first limiting hole or the second limiting hole.

6. The spring compression installation tool according to claim 5, characterized in that, The drive shaft assembly includes at least two first limiting holes, at least two second limiting holes, at least two moving blocks, at least four guide ramps, and at least four blocking ramps; at least two moving blocks are evenly distributed around the second shaft body, and the first limiting holes and second limiting holes are alternately and evenly arranged around the axis of the third shaft body; at least four blocking ramps are evenly arranged around the axis of the third shaft body, and at least four guide ramps are evenly arranged around the axis of the fourth shaft body.

7. The spring compression installation tool according to claim 4, characterized in that, The fourth axis has a rotation-limiting surface; When the moving block rotates around the axis of the fourth shaft to a circumferential position corresponding to the first or second limiting hole under the guidance of the guide slope, the limiting surface is configured to abut against the moving block to prevent the second shaft from continuing to rotate.

8. The spring compression installation tool according to claim 4, characterized in that, The drive shaft assembly includes a potential energy element for applying a potential energy to the second shaft in a direction away from the fourth shaft.

9. The spring compression installation tool according to claim 1, characterized in that, The drive shaft assembly includes a tether bolt located at one end of the second shaft extending from the housing, the tether bolt being used for detachably connecting the cable.

10. The spring compression installation tool according to claim 1, characterized in that, It also includes a fifth shaft, which is coaxially connected to the end of the first shaft away from the second shaft; the end of the fifth shaft away from the first shaft extends out of the housing for inputting power.

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