Fatigue test equipment for spring

Abstract

The utility model discloses fatigue test equipment for a spring, which comprises a base, a first connecting rod and a second connecting rod, a motor is arranged on one side of the base, parallel and opposite guide rails are arranged on the base, a sliding block horizontally connected with the guide rails in a sliding manner is arranged between the guide rails, and the sliding block is driven by the motor to do reciprocating rectilinear motion along the guide rails. A first connecting shaft is arranged on the sliding block, a first hook hole is formed in the end, away from the sliding block, of the first connecting shaft, a mounting base and a second connecting shaft which are connected are arranged at the end, away from the motor, of the base, a mounting shaft extending in the direction of the sliding block is arranged on the mounting base, a horizontal threaded hole is formed in the mounting shaft, and a screw is arranged on the second connecting shaft. The screw is in screwed connection with the threaded hole of the mounting shaft, a second hook hole is formed in the end, away from the screw, of the second connecting shaft, and the first hook hole and the second hook hole are used for connecting the two ends of a spring. According to the utility model, the installation of the spring is more convenient, the difficulty of pulling the spring open is reduced, and the spring fatigue test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fatigue testing, in particular to a fatigue testing device for a spring. Background Art

[0002] Spring fatigue test is a test method to evaluate the fatigue characteristics of springs during long-term use. Through this test, the life of the spring and its fatigue performance under different working conditions can be determined. During the test, the compression behavior of the spring is continuously monitored, and the number of compressions, deformation and abnormal phenomena are recorded to provide data support for subsequent analysis. Product problems can be found through comparison of test data, and problems can be improved to improve product quality and reduce production costs. When using a common spring fatigue test device, one end of the spring is usually connected to the test device first, and then the spring needs to be pulled apart to a certain length before it can be connected to the other end of the device. This installation method is more laborious and brings certain difficulties to testers with weak hand strength. Utility Model Content

[0003] In view of the above-mentioned technical problems, the purpose of the utility model is to provide a spring fatigue testing device to reduce the difficulty of installation.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A fatigue testing device for a spring comprises a base, a first connecting rod and a second connecting rod, wherein a bearing seat is arranged on the base, a motor is arranged on one side of the base, a reducer is arranged on the output end of the motor, and the output shaft of the reducer passes through the bearing seat and is rotatably connected to the bearing seat; parallel and opposite guide rails are arranged on the base, and a slider horizontally slidably connected to the guide rails is arranged between the guide rails, one end of the first connecting rod is fixedly connected to the output shaft, and the other end is rotatably connected to the second connecting rod, and the end of the second connecting rod away from the first connecting rod is rotatably connected to the slider, and the slider makes reciprocating linear motion along the guide rail under the drive of the motor. The slider is provided with a first connecting shaft, and a first hook hole is provided at the end of the first connecting shaft away from the slider; a connected mounting seat and a second connecting shaft are provided at the end of the base away from the motor, the mounting seat is located on the extension line of the movement trajectory of the slider and is detachably connected to the base, the mounting seat is provided with a mounting shaft extending in the direction of the slider, the mounting shaft is provided with a horizontal threaded hole, the second connecting shaft is provided with a screw, the screw is screwed and connected with the threaded hole of the mounting shaft, and a second hook hole is provided at the end of the second connecting shaft away from the screw, the first hook hole and the second hook hole are used to connect the two ends of the spring.

[0006] Preferably, the first connecting shaft is rotatably connected to the slider along an axial centerline.

[0007] Preferably, the second connecting shaft includes a first rotating shaft and a second rotating shaft which are coaxial and rotatably connected to each other, the screw rod is arranged on the second rotating shaft, and the second hook hole is arranged on the first rotating shaft.

[0008] Preferably, the base is provided with a sunken mounting surface, the mounting surface is provided with a plurality of connecting holes arranged at intervals along the movement direction of the slider, the mounting seat is provided with mounting holes corresponding to the spacing of the connecting holes, and the mounting seat is connected to the base by fasteners passing through the mounting holes and the connecting holes.

[0009] Preferably, shock-absorbing pads are provided at the bottom of the motor and the reducer.

[0010] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0011] The utility model discloses a spring fatigue testing device having a bearing seat on the base, a motor on one side of the base, a reducer on the output end of the motor, the output shaft of the reducer passes through the bearing seat and is rotatably connected to the bearing seat, the base is provided with parallel and opposite guide rails, a slider connected to the guide rails for horizontal sliding is provided between the guide rails, the slider makes reciprocating linear motion along the guide rails under the drive of the motor, a first connecting shaft is provided on the slider, a first hook hole is provided at one end of the first connecting shaft away from the slider, a connected mounting seat and a second connecting shaft are provided at one end of the base away from the motor, a mounting shaft extending in the direction of the slider is provided on the mounting seat, a horizontal threaded hole is provided on the mounting shaft, a screw is provided on the second connecting shaft, the screw is screwed and connected with the threaded hole of the mounting shaft, a second hook hole is provided at one end of the second connecting shaft away from the screw, the first hook hole and the second hook hole are used to connect the two ends of the spring, so that the installation of the spring is more convenient, the difficulty of pulling the spring apart is reduced, and the efficiency of the spring fatigue test is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The technical solution of the utility model is further described below in conjunction with the accompanying drawings:

[0013] Attached Figure 1 A three-dimensional diagram of a spring fatigue testing device according to the utility model;

[0014] Attached Figure 2 It is a three-dimensional diagram of the spring fatigue testing device of the utility model.

[0015] Among them: 1. base; 2. first connecting rod; 3. second connecting rod; 4. bearing seat; 5. motor; 6. reducer; 7. guide rail; 8. slider; 9. first connecting shaft; 91. first hook hole; 10. mounting seat; 101. mounting shaft; 102. mounting hole; 11. second connecting shaft; 111. first rotating shaft; 112. second rotating shaft; 113. screw; 114. second hook hole; 12. mounting surface; 13. connecting hole; 14. shock-absorbing pad; 15. spring. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0017] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0018] As attached Figure 1 , Attachment Figure 2The utility model shows a fatigue test device for springs, which includes a base 1, a first connecting rod 2 and a second connecting rod 3. A bearing seat 4 is installed on the base 1. A motor 5 is installed on one side of the base 1. A reducer 6 is connected to the output end of the motor 5. The output shaft of the reducer 6 passes through the bearing seat 4 and is rotatably connected to the bearing seat 4, so that the rotation is more stable and the vibration is reduced. Parallel and opposite guide rails 7 are installed on the base 1. There is a slider 8 horizontally slidably connected to the guide rails 7 between the guide rails 7. One end of the first connecting rod 2 is fixedly connected to the output shaft, and the other end is rotatably connected to the second connecting rod 3. The end of the second connecting rod 3 away from the first connecting rod 2 is rotatably connected to the slider 8. The slider 8 performs reciprocating linear motion along the guide rail 7 under the drive of the motor 5. The second connecting rod 3 is an arc-shaped rod that bends upward to avoid interference with the base 1 during movement. A first connecting shaft 9 is installed on the slider 8, and the end of the first connecting shaft 9 away from the slider 8 has a first hook hole 91. The end of the base 1 away from the motor 5 is provided with a connected mounting seat 10 and a second connecting shaft 11. The mounting seat 10 is located on the extension line of the motion trajectory of the slider 8 and is detachably connected to the base 1. The mounting seat 10 is provided with a mounting shaft 101 extending in the direction of the slider 8. The mounting shaft 101 is processed with a horizontal threaded hole. The second connecting shaft 11 is processed with a screw 113. The screw 113 is screwed and connected with the threaded hole of the mounting shaft 101. The end of the second connecting shaft 11 away from the screw 113 is provided with a second hook hole 114. The first hook hole 91 and the second hook hole 114 are used to connect the two ends of the spring 15. When installing, the second connecting shaft 11 can be firstly screwed out for a distance, one end of the spring 15 can be connected with the first hook hole 91, and then the other end of the spring 15 can be connected with the second hook hole 114, and then the second connecting shaft 11 can be screwed close to the mounting seat 10, so that the installation of the spring 15 is more convenient and the difficulty of pulling the spring 15 is reduced.

[0019] In this embodiment, the first connecting shaft 9 is rotatably connected to the slider 8 along the axis line, the second connecting shaft 11 includes a first rotating shaft 111 and a second rotating shaft 112 that are coaxial and rotatably connected to each other, the screw 113 is connected to the second rotating shaft 112, and the second hook hole 114 is connected to the first rotating shaft 111, so that the first hook hole 91 and the second hook hole 114 can rotate synchronously with the spring 15 to avoid the distortion of the spring 15 affecting the test results.

[0020] The spacing between the mounting seat 10 and the guide rail 7 is adjustable, the base 1 is processed with a sunken mounting surface 12, the mounting surface 12 is processed with a plurality of connection holes 13 arranged at intervals along the moving direction of the slider 8, the mounting seat 10 has mounting holes 102 corresponding to the spacing of the connection holes 13, and the mounting seat 10 is connected to the base 1 by fasteners passing through the mounting holes 102 and the connection holes 13. When the distance is adjusted to connect the mounting seat 10 to different connection holes 13, the screw 113 and the mounting shaft 101 can be screwed together to different lengths for fine adjustment, so that the spring 15 can be adjusted to the most suitable starting length when testing, so that the test results are more accurate and effective.

[0021] The sinking of the mounting surface 12 can make the mounting seat 10 embedded in the base 1, and the two sides of the mounting seat 10 abut against the two sides of the mounting surface 12, making the connection more stable and reducing the overall vibration when the motor 5 rotates. Shock-absorbing pads 14 are installed at the bottom of the motor 5 and the reducer 6 to make the device more stable and reliable.

[0022] When in use, first install the mounting seat 10 at a suitable position of the base 1 according to the size of the spring 15 to be tested, hook one end of the spring 15 with the first hook hole 91, rotate the second connecting shaft 11 out a distance, then connect the other end of the spring 15 with the second hook hole 114, and then screw the second connecting shaft 11 close to the mounting seat 10, so that the installation of the spring 15 is more convenient, the difficulty of pulling open the spring 15 is reduced, and the test length of the spring 15 is also more accurate.

[0023] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A spring fatigue testing device, characterized in that: The invention comprises a base, a first connecting rod and a second connecting rod, wherein a bearing seat is arranged on the base, a motor is arranged on one side of the base, a reducer is arranged on the output end of the motor, and the output shaft of the reducer passes through the bearing seat and is rotatably connected to the bearing seat; parallel and opposite guide rails are arranged on the base, and a slider horizontally slidably connected to the guide rails is arranged between the guide rails, one end of the first connecting rod is fixedly connected to the output shaft, and the other end is rotatably connected to the second connecting rod, and the end of the second connecting rod away from the first connecting rod is rotatably connected to the slider, and the slider makes reciprocating linear motion along the guide rail under the drive of the motor, and a slider is arranged on the slider There is a first connecting shaft, and a first hook hole is provided at the end of the first connecting shaft away from the slider; a connected mounting seat and a second connecting shaft are provided on the end of the base away from the motor, the mounting seat is located on the extension line of the movement trajectory of the slider and is detachably connected to the base, the mounting seat is provided with a mounting shaft extending in the direction of the slider, the mounting shaft is provided with a horizontal threaded hole, the second connecting shaft is provided with a screw, the screw is screwed and connected with the threaded hole of the mounting shaft, and a second hook hole is provided at the end of the second connecting shaft away from the screw, the first hook hole and the second hook hole are used to connect the two ends of the spring.

2. The spring fatigue testing device according to claim 1, characterized in that: The first connecting shaft is rotatably connected to the slider along the axis.

3. The spring fatigue testing device according to claim 1, characterized in that: The second connecting shaft includes a first rotating shaft and a second rotating shaft which are coaxial and rotatably connected to each other, the screw rod is arranged on the second rotating shaft, and the second hook hole is arranged on the first rotating shaft.

4. The spring fatigue testing device according to claim 1, characterized in that: The distance between the mounting seat and the guide rail is adjustable.

5. The spring fatigue testing device according to claim 4, characterized in that: The base is provided with a sunken mounting surface, the mounting surface is provided with a plurality of connection holes arranged at intervals along the movement direction of the slider, the mounting seat is provided with mounting holes corresponding to the spacing of the connection holes, and the mounting seat is connected to the base via fasteners passing through the mounting holes and the connection holes.

6. The spring fatigue testing device according to claim 1, characterized in that: Shock-absorbing pads are arranged at the bottom of the motor and the reducer.

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