Torsion spring durability test tool

Abstract

The utility model relates to a torsion spring durability test tool, the torsion spring durability test tool comprises a bottom plate, a driving mechanism, a transmission mechanism, a first connecting piece and a second connecting piece, the driving mechanism is arranged on the bottom plate, and the driving mechanism is provided with a transmission shaft; the input end of the transmission mechanism is in transmission connection with the transmission shaft; the first connecting piece is arranged at the output end of the transmission mechanism, and the first connecting piece is connected with the movable end of the torsional spring so as to drive the movable end of the torsional spring to do circular motion; and the second connecting piece is arranged on the bottom plate and is connected with the fixed end of the torsional spring. Therefore, the working state of the torsional spring in the gearbox of the vehicle can be simulated through the torsional spring durability test tool so as to test the working limit number of times of the torsional spring and verify whether the working limit number of times of the torsional spring meets the preset standard requirement or not, the torsional spring and other parts do not need to be put into the gearbox together for testing, and the test efficiency and accuracy are improved.

Description

Technical Field

[0001] The present application relates to the technical field of torsion spring durability testing, and in particular to a torsion spring durability testing tool. Background Art

[0002] In the prior art, the durability life test of the torsion spring is generally carried out using the vehicle's gearbox. During the test, the entire gearbox needs to be tested together. Once the test result is abnormal, it is impossible to accurately determine whether the fault source comes from the torsion spring or other parts in the gearbox. This testing method leads to low testing efficiency. Utility Model Content

[0003] The present application provides a torsion spring durability testing tool to solve the technical problem of low efficiency when testing the performance of a torsion spring.

[0004] An embodiment of the present application provides a torsion spring durability testing tool, including a base plate, a driving mechanism, a transmission mechanism, a first connecting member and a second connecting member, wherein the driving mechanism is arranged on the base plate, and the driving mechanism has a transmission shaft; the input end of the transmission mechanism is transmission-connected to the transmission shaft; the first connecting member is arranged at the output end of the transmission mechanism, and the first connecting member is connected to the movable end of the torsion spring to drive the movable end of the torsion spring to perform circular motion; the second connecting member is arranged on the base plate and connected to the fixed end of the torsion spring to limit the movement of the fixed end of the torsion spring.

[0005] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0006] The torsion spring durability test fixture of the embodiment of the present application can simulate the working state of the torsion spring in the vehicle's gearbox to test the working limit times of the torsion spring and verify whether the working limit times of the torsion spring meets the preset standard requirements. There is no need to put the torsion spring into the gearbox for testing together with other components, so as to improve the efficiency and accuracy of the test.

[0007] In some embodiments, the transmission mechanism includes: a cam, the cam is sleeved on the transmission shaft, and the transmission shaft can drive the cam to rotate; a push rod, one end of the push rod is connected to the cam, and the push rod can move back and forth in the up and down directions; a pressure rod, one end of the pressure rod is connected to the other end of the push rod, and the other end of the pressure rod makes a circular motion, and the first connecting member is arranged at the other end of the pressure rod.

[0008] In some embodiments, it also includes: a first mounting seat, the first mounting seat is located on one side of the pressure rod and is arranged opposite to the other end of the pressure rod, the first mounting seat is provided with a positioning pin, and the other end of the pressure rod has a through hole for the positioning pin to pass through.

[0009] In some embodiments, it also includes: a limiting sleeve, which is placed on the positioning pin and is detachably connected to the positioning pin.

[0010] In some embodiments, it also includes: a second mounting seat, the second mounting seat is arranged on the base plate and is located on the side of the pressure rod away from the first mounting seat, the transmission shaft is installed on the second mounting seat, and the second connecting member is arranged on the second mounting seat and extends toward the other end of the pressure rod.

[0011] In some embodiments, it also includes: a nut and a bushing, wherein the bushing and the nut are externally mounted on the transmission shaft, and the bushing is disposed between the cam and the nut.

[0012] In some embodiments, a flat key is provided between the cam and the transmission shaft to limit the movement of the cam along the radial direction of the transmission shaft.

[0013] In some embodiments, the push rod has a mounting groove, one end of the mounting groove facing the cam is open and is provided with a bearing, and the bearing is in rolling fit with the cam.

[0014] In some embodiments, there are multiple transmission mechanisms, and the multiple transmission mechanisms are arranged sequentially along the extension direction of the transmission shaft.

[0015] In some embodiments, the plurality of transmission mechanisms include a first transmission mechanism and a second transmission mechanism, and the first transmission mechanism and the second transmission mechanism are respectively located on both sides of the transmission shaft in a radial direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0019] Figure 1 A three-dimensional diagram of a torsion spring durability test tool provided in an embodiment of the present application;

[0020] Figure 2 A side view of a torsion spring durability test tool provided in an embodiment of the present application;

[0021] Figure 3 A top view of a torsion spring durability test tool provided in an embodiment of the present application;

[0022] Figure 4 for Figure 3 Cross-sectional view at AA.

[0023] Description of reference numerals:

[0024] 1. Torsion spring durability test tool; 10. Base plate; 20. Motor; 30. Transmission shaft; 40. First connecting member; 50. Second connecting member; 60. Cam; 70. Push rod; 71. Mounting groove; 80. Press rod; 90. First mounting seat; 100. Locating pin; 110. Limit sleeve; 120. Second mounting seat; 130. Nut; 140; First bushing; 150. Second bushing; 160. Annular protrusion; 170. Flat key; 180. Bearing; 190. First transmission mechanism; 200. Second transmission mechanism. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0026] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0027] For ease of description, spatial relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figure, such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside". Such spatial relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a change in posture or a change in motion state, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0028] In the description of the present application, “plurality” means two or more.

[0029] In order to solve the technical problem of low efficiency of the performance test of torsion springs in the prior art, the present application provides a torsion spring durability test tool 1 , comprising a base plate 10 , a driving mechanism, a transmission mechanism, a first connecting member 40 and a second connecting member 50 .

[0030] Specifically, if Figure 1-Figure 4 As shown, the driving mechanism is arranged on the base plate 10, and the driving mechanism has a transmission shaft 30; the input end of the transmission mechanism is transmission-connected with the transmission shaft 30; the first connecting member 40 is arranged at the output end of the transmission mechanism, and the first connecting member 40 is connected to the movable end of the torsion spring to drive the movable end of the torsion spring to make an arc motion, and the second connecting member 50 is arranged on the base plate 10 and the second connecting member 50 is connected to the fixed end of the torsion spring to limit the movement of the fixed end of the torsion spring.

[0031] The driving mechanism may include a motor 20, and is disposed on the bottom plate 10 through a motor bracket. The transmission shaft 30 may be connected to the motor 20 through a cross coupling. The motor 20 may be used as a power source to drive the transmission shaft 30 to rotate, and the transmission shaft 30 may drive the transmission mechanism to move, and the output end of the transmission mechanism may make an arc motion. In this way, the output end of the transmission mechanism may drive the movable end of the torsion spring to make an arc motion through the first connecting member 40, and the second connecting member 50 may limit the movement of the fixed end of the torsion spring, so that the torsion spring may reciprocate between the working position and the installation position, so as to simulate the working state of the torsion spring in the gearbox. For example, the first connecting member 40 and the second connecting member 50 are both positioning stop shafts, and the two ends of the torsion spring are respectively in contact with the two positioning stop shafts.

[0032] Therefore, the torsion spring durability test fixture 1 can be used to simulate the torsion spring working in the vehicle's gearbox to test the working limit times of the torsion spring and verify whether the working limit times of the torsion spring meet the preset standard requirements. There is no need to put the torsion spring together with other components into the gearbox for testing, so as to improve the efficiency and accuracy of the test.

[0033] In some embodiments, Figure 1 As shown, the transmission mechanism includes: a cam 60, a push rod 70 and a pressure rod 80. The cam 60 is sleeved on the transmission shaft 30, and the transmission shaft 30 can drive the cam 60 to rotate; one end of the push rod 70 is connected to the cam 60, and the push rod 70 can reciprocate in the up and down direction, and the push rod 70 is pushed up and down by the outer contour of the cam 60; one end of the pressure rod 80 is connected to the other end of the push rod 70, and the other end of the pressure rod 80 makes an arc motion, and the first connecting member 40 is arranged at the other end of the pressure rod 80. For example, the cam 60 is the input end of the transmission mechanism, one end of the pressure rod 80 is the rod body, the other end of the pressure rod 80 is a flat cylinder, and the other end of the pressure rod 80 is the output end of the transmission mechanism. By setting the cam 60, the push rod 70 and the pressure rod 80 that are matched with the transmission, the rotational motion of the transmission shaft 30 can be converted into a linear motion and then into an arc motion, so as to simulate the working state of the torsion spring for testing.

[0034] In some embodiments, Figure 1 As shown, the torsion spring durability test tool 1 also includes: a first mounting seat 90, the first mounting seat 90 is located on one side of the pressure rod 80 and is arranged opposite to the other end of the pressure rod 80, the first mounting seat 90 is provided with a positioning pin 100, and the other end of the pressure rod 80 has a through hole for the positioning pin 100 to pass through. During the test, the torsion spring is sheathed on the positioning pin 100, for example, a flanged ball bearing 180 can be provided between the through hole and the positioning pin 100, and the central axis of the positioning pin 100 can be colinear with the rotation axis of the arc motion of the active end of the torsion spring to ensure the accuracy of the test.

[0035] Furthermore, the torsion spring durability test tool 1 further includes: a limiting sleeve 110, which is externally mounted on the positioning pin 100 and is detachably connected to the positioning pin 100. For example, the limiting sleeve 110 is a threaded member and can be threadedly matched with the positioning pin 100. During the test, the limiting sleeve 110 can be externally mounted on the positioning pin 100 to limit the axial movement of the torsion spring, thereby improving the test effect.

[0036] In some embodiments, Figure 1As shown, the torsion spring durability test tool 1 also includes a second mounting seat 120, which is arranged on the bottom plate 10 and is located on the side of the pressure rod 80 away from the first mounting seat 90, the transmission shaft 30 is installed on the second mounting seat 120, and the second connecting member 50 is arranged on the second mounting seat 120 and extends toward the other end of the pressure rod 80. By setting the second mounting seat 120, on the one hand, it can play the role of installing and supporting the transmission shaft 30; on the other hand, the second connecting member 50 can be installed to facilitate the positioning of the fixed end of the torsion spring.

[0037] In some embodiments, Figure 2 As shown, the torsion spring durability test tool 1 also includes: a nut 130 and a bushing. The bushing and the nut 130 are sleeved on the transmission shaft 30, and the bushing is arranged between the cam 60 and the nut 130. Thus, the nut 130 can play a role in axially limiting the cam 60, and the bushing can reduce friction to improve the accuracy and service life of the torsion spring durability test tool 1.

[0038] For example, when there are multiple transmission mechanisms including a first transmission mechanism 190 and a second transmission mechanism 200, there may be multiple bushings including a first bushing 140 and a second bushing 150. An annular protrusion 160 may be provided at one end of the transmission shaft 30. The cam 60 of the first transmission mechanism 190 is restricted between the annular protrusion 160 and the first bushing 140. The cam 60 of the second transmission mechanism 200 is disposed between the first bushing 140 and the second bushing 150. The nut 130 is provided on the side of the second bushing 150 away from the first bushing 140. The movement of the first transmission mechanism 190 and the second transmission mechanism 200 may be jointly restricted by the nut 130, the first bushing 140, the second bushing 150 and the annular protrusion 160.

[0039] In some embodiments, Figure 4 As shown, a flat key 170 is provided between the cam 60 and the transmission shaft 30 to limit the movement of the cam 60 along the radial direction of the transmission shaft to improve the test accuracy.

[0040] In some embodiments, Figure 4 As shown, the push rod 70 has a mounting groove 71, one end of the mounting groove 71 facing the cam 60 is open and one end of the mounting groove 71 facing the cam 60 is provided with a bearing 180, and the bearing 180 is rollingly matched with the cam 60. For example, the mounting groove 71 can be a U-shaped groove, and the pressure rod 80 can extend into the mounting groove 71 and be hingedly connected through a hinge. The transmission mechanism can also include a hinge pin, and the bearing 180 is installed in the mounting groove 71 through the hinge pin. By providing the bearing 180, the friction between the cam 60 and the push rod 70 can be reduced.

[0041] In some embodiments, Figure 1 and Figure 4As shown, there are multiple transmission mechanisms, and the multiple transmission mechanisms are arranged in sequence along the extension direction of the transmission shaft 30, so that multiple torsion springs can be tested simultaneously to further improve the test efficiency.

[0042] Furthermore, if Figure 4 As shown, the plurality of transmission mechanisms include a first transmission mechanism 190 and a second transmission mechanism 200, and the first transmission mechanism 190 and the second transmission mechanism 200 are respectively located on both sides of the radial direction of the transmission shaft 30. This can save space and improve transmission stability.

[0043] The torsion spring durability testing tool 1 of the embodiment of the present application has the advantages of simple structure, small size, easy installation and low testing cost.

[0044] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0046] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0047] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A torsion spring durability test tool, characterized in that: include: Base plate; A driving mechanism, the driving mechanism is arranged on the bottom plate, and the driving mechanism has a transmission shaft; A transmission mechanism, wherein an input end of the transmission mechanism is transmission-connected to the transmission shaft; A first connecting member, the first connecting member is arranged at the output end of the transmission mechanism, and the first connecting member is connected to the movable end of the torsion spring to drive the movable end of the torsion spring to perform circular motion; A second connecting member is disposed on the bottom plate and connected to the fixed end of the torsion spring to limit the movement of the fixed end of the torsion spring.

2. The torsion spring durability test tool according to claim 1, characterized in that: The transmission mechanism comprises: A cam, wherein the cam is sleeved on the transmission shaft, and the transmission shaft can drive the cam to rotate; A propulsion rod, one end of which is connected to the cam, and the propulsion rod can reciprocate in an up-and-down direction; A pressure rod, one end of which is connected to the other end of the propulsion rod, the other end of which moves in an arc, and the first connecting member is arranged at the other end of the pressure rod.

3. The torsion spring durability test tool according to claim 2, characterized in that: Also includes: The first mounting seat is located at one side of the pressure rod and is arranged opposite to the other end of the pressure rod. The first mounting seat is provided with a positioning pin, and the other end of the pressure rod has a through hole for the positioning pin to pass through.

4. The torsion spring durability test tool according to claim 3, characterized in that: Also includes: A limiting sleeve is placed outside the positioning pin and is detachably connected to the positioning pin.

5. The torsion spring durability test tool according to claim 3, characterized in that: Also includes: The second mounting seat is arranged on the bottom plate and located on the side of the pressure rod away from the first mounting seat, the transmission shaft is installed on the second mounting seat, and the second connecting member is arranged on the second mounting seat and extends toward the other end of the pressure rod.

6. The torsion spring durability test tool according to claim 2, characterized in that: Also includes: A nut and a bushing, wherein the bushing and the nut are externally mounted on the transmission shaft, and the bushing is arranged between the cam and the nut.

7. The torsion spring durability test tool according to claim 2, characterized in that: A flat key is provided between the cam and the transmission shaft to limit the movement of the cam along the radial direction of the transmission shaft.

8. The torsion spring durability test tool according to claim 2, characterized in that: The push rod has a mounting groove, one end of the mounting groove facing the cam is open and is provided with a bearing, and the bearing is in rolling cooperation with the cam.

9. The torsion spring durability test tool according to claim 1, characterized in that: There are multiple transmission mechanisms, and the multiple transmission mechanisms are arranged in sequence along the extension direction of the transmission shaft.

10. The torsion spring durability test tool according to claim 9, characterized in that: The plurality of transmission mechanisms include a first transmission mechanism and a second transmission mechanism, and the first transmission mechanism and the second transmission mechanism are respectively located on both sides of the transmission shaft in a radial direction.

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