A spring detection device and method

Abstract

The present application discloses a spring detection device and method, including a machine body, a guiding device, a testing frame, and a driving device. Among them, a first group of springs to be tested are connected between the first testing frame and the fixing frame, and a second group of springs to be tested are connected between the second testing frame and the fixing frame. The first testing frame and the second testing frame are connected through a connecting mechanism to achieve linkage. When the first group of springs to be tested are in a stretched or contracted state, the second group of springs to be tested are in a contracted or stretched state. The present application provides a detection device and method for extension springs with a maximum working deformation greater than 1 meter, which can not only improve the testing efficiency but also improve the testing accuracy.

Description

Technical Field

[0001] This application relates to the technical field of mechanical testing, and particularly to a spring detection device and method. Background Art

[0002] A spring is a mechanical part that utilizes elasticity. After the production of a spring is completed, it needs to be tested for its elastic force before it can be put into use. A spring fatigue testing device mainly conducts fatigue tests on a spring by compressing or stretching the spring to obtain the fatigue characteristics of the spring, so that the appropriate spring can be correctly used in different application scenarios. Therefore, a spring fatigue testing device has become one of the essential devices for each spring manufacturer and application manufacturer. In the prior art, when conducting a fatigue test on a spring through a spring fatigue testing device, a rotating arm mechanism is usually used to drive a spring to stretch or compress in a reciprocating motion. During the rotation of the rotating arm, due to the very large inertial impact force when the spring rebounds after stretching, the rotating arm mechanism loses balance under the force, is prone to vibration and cannot rotate at a high speed, affecting the testing efficiency and accuracy of the spring fatigue testing device. In addition, for a long spring with a length exceeding one meter, the deformation amount under the working load exceeds one meter, and the total length of the stretched spring exceeds two meters. Therefore, this testing device with a rotating arm structure cannot meet the testing requirements.

[0003] Based on the above problems, it is necessary to develop a detection device and method for a tension spring with a deformation amount exceeding one meter under the working load, which can not only improve the testing efficiency but also improve the testing accuracy. Summary of the Invention

[0004] In order to solve the technical problem that there is no relevant detection device for a tension spring with a maximum working deformation amount greater than one meter or the testing efficiency and accuracy of the detection device are low, this application provides a spring detection device.

[0005] A spring testing device provided by the present application adopts the following technical solution: A spring testing device is used to perform performance testing on a tension spring with a maximum working deformation greater than 1 meter. The spring testing device includes a machine body and a fixing frame connected to the machine body. The spring testing device further includes: a guiding device installed inside the machine body. The guiding device includes a first guiding device and a second guiding device, and the first guiding device and the second guiding device are arranged in parallel; a testing frame, including a first testing frame and a second testing frame. The first testing frame is movably installed on the first guiding device, and the second testing frame is movably installed on the second guiding device. The first testing frame and the second testing frame are connected by a connecting mechanism to achieve linkage; a driving device installed inside the machine body for driving the testing frame to move along the guiding device. Among them, a first group of springs to be tested is connected between the first testing frame and the fixing frame, and a second group of springs to be tested is connected between the second testing frame and the fixing frame. When the first group of springs to be tested is in a stretched or contracted state, the second group of springs to be tested is in a contracted or stretched state.

[0006] By adopting the above technical solution, the technical problem that the traditional spring testing device can only test one group of springs is solved. Due to the large inertial impact force when the spring rebounds after being stretched, the testing mechanism loses balance under force, generates vibration and cannot rotate at a high speed. The testing efficiency and testing accuracy of the spring fatigue testing device are improved. Because the traditional swing arm testing device is restricted by the structure and cannot test springs with large deformations, this technical solution also solves the technical problem of testing springs with a deformation greater than 1 meter under working load.

[0007] In a further solution, the fixing frame includes a first fixing frame and a second fixing frame. The first group of springs to be tested is connected between the first testing frame and the first fixing frame, and the second group of springs to be tested is connected between the second testing frame and the second fixing frame. The first fixing frame and / or the second fixing frame can be adjusted in position along the moving direction of the testing frame.

[0008] By adopting the above technical solution, the two groups of springs are fixed separately and can also be adjusted separately, increasing the flexibility of testing and adjusting different spring lengths, with stronger versatility and higher testing accuracy.

[0009] In a further solution, a fixed pulley is provided on the machine body. The connecting mechanism is a fixed pulley and a connecting piece connected to the fixed pulley. The first testing frame and the second testing frame are connected by the connecting piece passing around the fixed pulley.

[0010] By adopting the above technical solution, the problem that for a spring with a deformation amount greater than 1 meter under the working load, the maximum tensile length of a single spring may exceed 2 meters during the test. If arranged in series, the length in the space will be very long, restricting the use environment of the test equipment, is solved. Through this technical solution, two groups of springs can be arranged in a staggered layer up and down, which can save the space in the length direction of the test equipment, increase little in height, and the arrangement is more reasonable and can achieve the same test effect and accuracy.

[0011] In a further solution, the driving device is connected to the second test frame through a conveyor belt and drives the second test frame to move along the second guiding device. When the second test frame moves, it drives the first test frame to move along the first guiding device in the opposite direction to the second test frame through a connecting mechanism or the elastic force of the first spring under test.

[0012] By adopting the above technical solution, two groups of springs can be synchronously driven by one driving device for synchronous testing, and the mutual cancellation of the forces of the two groups of springs during the testing process can also be achieved, reducing the vibration caused by the working load and unbalanced force of the driving device, which affects the test accuracy and the service life of the equipment.

[0013] In a further solution, the driving device is connected to the connecting mechanism and drives the connecting mechanism to move. When the connecting mechanism moves, it drives the first test frame to move along the first guiding device and the second test frame to move along the second guiding device, and the moving directions of the first test frame and the second test frame are opposite.

[0014] By adopting the above technical solution, the driving device synchronously drives two groups of springs for synchronous testing, realizes the mutual cancellation of the forces of the two groups of springs during the testing process, has a more balanced force, a simpler structure, reduces the vibration caused by the working load and unbalanced force of the driving device, which affects the test accuracy and the service life of the equipment.

[0015] In a further solution, sensors are provided on the first test frame and / or the second test frame. The sensors are connected to the control device. When the sensors detect that the spring breaks or the force attenuation amplitude reaches a set threshold, the control device controls the spring detection equipment to stop the test.

[0016] By adopting the above technical solution, the abnormal conditions of the spring can be monitored during the test, avoiding mechanical failures or personal dangers caused by the spring being driven by the test equipment to swing around when the spring breaks during the test. In addition, when the attenuation amplitude of the spring is lower than the standard requirement, continuing the test is meaningless. Stopping the test in time can save test time, reduce energy consumption, and also avoid dangerous accidents caused by further testing leading to spring breakage.

[0017] A further solution further includes an alarm device. Sensors are also provided on the first test stand and / or the second test stand. The sensors are connected to the alarm device. When the sensors detect that the spring breaks or the force attenuation amplitude reaches a set threshold, the alarm device emits a warning signal.

[0018] By adopting the above technical solution, the abnormal conditions of the spring can be monitored during the test. When the spring breaks during the test, an alarm can be given in time to notify the operator to handle it in time. In addition, when the attenuation amplitude of the spring is lower than the standard requirement, it is meaningless to continue the test. The test should be stopped in time and the tester should be notified to replace and analyze the spring.

[0019] A further solution is that the driving device is a motor. The motor is connected with a pulley. The connecting mechanism is a pulley and a belt that cooperates with the pulley. Both ends of the belt are respectively connected to the first test stand and the second test stand.

[0020] By adopting the above technical solution, the belt wheel mechanism is driven by the motor to test two groups of springs, and the structure is simpler and the test is more reliable.

[0021] A further solution further includes an alarm device. The alarm device is connected to the control device. When the sensors detect that the spring breaks or the force attenuation amplitude reaches a set threshold, the control device controls the alarm device to emit a warning signal.

[0022] By adopting the above technical solution, through the control of the control device, when the sensors detect that the spring breaks or the force attenuation amplitude reaches a set threshold, the equipment can be synchronously controlled to stop the test and give an alarm, avoiding the dangerous situation where the spring breaks and swings around, and the tester hears the alarm but cannot approach to operate and stop the machine.

[0023] In order to solve the technical problems of low test efficiency and low test accuracy of the spring detection equipment for springs with a maximum working deformation amount exceeding one meter in length, the present application also provides a spring detection method.

[0024] A spring detection method provided by this application adopts the following technical solution: A spring detection method is applicable to the spring detection device as described above. The detection method includes: The driving device drives the first test frame to move to the first installation position; Install the first group of springs to be tested between the first test frame and the first fixed frame; The driving device drives the second test frame to move to the second position; Install the springs to be tested between the second test frame and the second fixed frame; The control device starts the detection mode; The driving device drives the first test frame and the second test frame to reciprocate along the first guiding device and the second guiding device respectively; When the number of detections reaches the set value, the spring detection device stops testing; When the sensor detects that the spring breaks or the force attenuation amplitude reaches the set threshold, the control device controls the alarm device to emit a warning signal, and the spring detection device stops testing.

[0025] By adopting the above technical solution, in addition to having the above technical effects, when testing, the tester can more conveniently install or remove the spring from the test device by controlling the test frame to move to the position of the free length of the spring to be tested, which reduces the work intensity of the tester.

[0026] In summary, this application has at least one of the following beneficial technical effects:

[0027] 1. The spring test device of this application improves the test efficiency and test accuracy of the spring fatigue test device, and also solves the technical problem of testing springs with a deformation amount greater than 1 meter under working load.

[0028] 2. The spring test device of this application fixes two groups of springs separately and can also be adjusted separately, increasing the flexibility of test adjustment for different spring lengths, having stronger versatility and higher test accuracy.

[0029] 3. The spring test device of this application can arrange two groups of springs in a staggered manner up and down, saving space in the length direction of the test device, with little increase in height, more reasonable layout and achieving the same test effect and accuracy.

[0030] 4. The spring test device of this application can synchronously drive two groups of springs for synchronous testing through one driving device, and can also cancel out the forces of the two groups of springs during the test, reducing the vibration caused by the working load and unbalanced force of the driving device, which affects the test accuracy and the service life of the device.

[0031] 5. The spring test device of this application can monitor the abnormal conditions of the spring during the test, avoid mechanical failures or personal dangers caused by the spring being driven by the test device to swing around when the spring breaks during the test, and avoid dangerous accidents of spring breakage caused by further testing when the spring attenuation amplitude is lower than the standard requirements.

[0032] 6. In addition to the beneficial effects of the above spring testing equipment, the spring testing method of the present application also facilitates the disassembly and assembly of the spring to be tested, reducing the working intensity of the testing personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic front view of the spring detection equipment of the present application;

[0034] Figure 2 is a schematic diagram of the first working state structure of the first embodiment of the spring detection equipment of the present application;

[0035] Figure 3 is a schematic diagram of the second working state structure of the first embodiment of the spring detection equipment of the present application;

[0036] Figure 4 is a schematic diagram of the third working state structure of the first embodiment of the spring detection equipment of the present application;

[0037] Figure 5 is a schematic rear view of the spring detection equipment of the present application;

[0038] Figure 6 is a schematic diagram of the structure of the second embodiment of the spring detection equipment of the present application;

[0039] Figure 7 is a schematic diagram of the structure of the third embodiment of the spring detection equipment of the present application;

[0040] Figure 8 is a schematic diagram of the structure of the fourth embodiment of the spring detection equipment of the present application;

[0041] Figure 9 is a schematic diagram of the structure of the fifth embodiment of the spring detection equipment of the present application;

[0042] Figure 10 is a flowchart of the embodiment of the spring detection method of the present application.

[0043] REFERENCE SIGNS:

[0044] 1. Body; 2. Switch; 3. Control device; 4. Alarm lamp; 5. Machine cover; 6. First group of springs to be tested; 7. First test rack; 8. Belt; 9. First guide rail; 10. Motor; 11. Belt pulley; 12. Second guide rail; 13. Second test rack; 14. Second group of springs to be tested; 15. Conveyor belt; 16. Second fixing bracket; 17. First fixing bracket; 18. Fixing block; 19. Third group of springs to be tested. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention described and illustrated in the drawings herein can be arranged and designed in a variety of different configurations. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0046] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0047] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0049] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the features in the following embodiments can be combined with each other.

[0050] Please refer to Figure 1 As shown, this embodiment discloses a spring detection device. The spring detection device includes a machine body 1, a machine cover 5 that can be opened and closed on the machine body 1, a switch 2 of the device, a control device 3, and an alarm lamp 4. The machine cover 5 is opened before the test. After installing the spring to be tested, the machine cover 5 is closed. The switch 2 of the device is used to turn the device on and off, and can also be provided with adjustment buttons for adjusting different test parameters. The control device 3 is used to execute the test program, and a display device can also be set for synchronously displaying the test status and providing feedback during the adjustment process. The alarm lamp 4 is used to give an alarm when the test is completed or an abnormality occurs, prompting the tester to perform relevant operations.

[0051] Embodiment 1

[0052] Please refer to Figure 2As shown in the figure, this embodiment discloses a spring detection device. After opening the machine cover 5, the internal structure is as shown in the figure. Inside the machine body 1, there is a first guide rail 9 and a second guide rail 12 which is arranged parallel to the first guide rail 9 and located below the first guide rail 9. A first test rack 7 is slidably mounted on the first guide rail 9. One end of the first test rack 7 and one side of the machine body 1 close to the switch 2 are connected with a first group of springs to be tested 6 through a hook. A second test rack 13 is slidably mounted on the second guide rail 12. One end of the second test rack 13 and one side of the machine body 1 close to the switch 2 are connected with a second group of springs to be tested 14 through a hook. A pulley 11 is installed on the side far from the switch 2. The pulley 11 is connected with a motor 10 and can rotate under the drive of the motor 10. The first test rack 7 and the second test rack 13 are connected by a belt 8 passing around a pulley. When the motor 10 works, it drives the pulley to rotate. The rotation of the pulley drives the belt 8 to move. The movement of the belt 8 drives the connected first test rack 7 and second test rack 13 to slide linearly along the first guide rail 9 and the second guide rail 12. During the sliding process of the first test rack 7 and the second test rack 13, the connected first group of springs to be tested 6 and the second group of springs to be tested 14 are stretched or contracted, so as to achieve the purpose of the detection device for detecting the springs to be tested. Figure 2 It is a working instant state when the first group of springs to be tested 6 freely contracts and the second group of springs to be tested 14 is stretched with the maximum deformation.

[0053] Please refer to Figure 3 As shown in the figure, it is a schematic diagram of the second working state of the first embodiment. In this working instant state, the motor 10 rotates, the first test rack 7 slides to the left in the view, that is, slides in the direction close to the motor 10; the second test rack 13 slides to the right in the view, that is, slides in the direction away from the motor 10; both the first group of springs to be tested 6 and the second group of springs to be tested 14 are in a semi-stretched state.

[0054] Please refer to Figure 4 As shown in the figure, it is a schematic diagram of the third working state of the first embodiment. In this working instant state, the motor 10 rotates, the first test rack 7 continues to slide to the left in the view, the second test rack 13 continues to slide to the right in the view, the first group of springs to be tested 6 is in the maximum stretched state, and the second group of springs to be tested 14 is in the free contraction state.

[0055] Subsequently, the motor 10 rotates in reverse, and the first group of springs to be tested 6 and the second group of springs to be tested 14 return to Figure 3 As shown in the figure, both the first group of springs to be tested 6 and the second group of springs to be tested 14 are in the semi-stretched state. The motor 10 continues to rotate in reverse, and the first group of springs to be tested 6 and the second group of springs to be tested 14 return to Figure 2 The working state shown in the figure when the first group of springs to be tested 6 freely contracts and the second group of springs to be tested 14 is stretched with the maximum deformation.

[0056] The above completes a cycle, and the motor 10 continuously rotates forward and backward to stretch and contract the first group of springs to be tested 6 and the second group of springs to be tested 14 for spring performance and life testing.

[0057] The working process and principle of the spring testing device are as follows: First, install the first group of springs to be tested 6 on the hooks of the first test stand 7 and the body 1, and then install the second group of springs to be tested 14 on the hooks of the second test stand 13 and the body 1, and start the device for testing. The motor 10 works to drive the pulley 11 to rotate, and the rotation of the pulley 11 drives the belt 8 to pull the first group of springs to be tested 6 to move along the first guide rail 9 in the direction close to the motor 10. At the same time, since the second group of springs to be tested 14 is in a stretched state, the second group of springs to be tested 14 pulls the second test stand 13 to slide along the second guide rail 12 in the direction away from the motor 10 under the action of the elastic force. When the first group of springs to be tested 6 is in the maximum stretched state and the second group of springs to be tested 14 is in the contracted state, the motor 10 reverses, and the belt 8 pulls the second test stand 13 to move in the direction close to the motor 10, and the first group of springs to be tested 6 pulls the first test stand 7 to slide in the direction away from the motor 10 under the action of the elastic force, thus completing a test cycle. In this way, the cycle repeats to complete the requirements and purposes of the test.

[0058] Embodiment 2

[0059] Please refer to Figure 5 as shown in the schematic diagram of the back structure of the spring testing device.

[0060] Please refer to Figure 6 as shown. The difference between this embodiment and Embodiment 1 is that in this embodiment, the motor 10 is located below the second guide rail 12. The motor 10 is connected with a conveyor belt 15, and a fixing block 18 is fixedly installed on the conveyor belt 15, and the fixing block 18 is connected with the second test stand 13. According to specific working needs, a speed change mechanism can be set between the motor 10 and the conveyor belt 15, and the speed change mechanism can be a pulley 11 mechanism, a sprocket mechanism, or a gear mechanism. This embodiment also has adjustable first fixing frame 17 and second fixing frame 16. One end of the first group of springs to be tested 6 is connected to the hook on the first fixing frame 17, and the other end is connected to the hook on the first test stand 7; one end of the second group of springs to be tested 14 is connected to the hook on the second fixing frame 16, and the other end is connected to the hook on the second test stand 13. Since the first fixing frame 17 and the second fixing frame 16 can adjust the distance in the sliding direction of the first test stand 7 and the second test stand 13, it can adapt to the testing of more models of springs with different lengths to be tested.

[0061] The difference in the working process and principle of this embodiment from that of the first embodiment is that the motor 10 in this embodiment drives the conveyor belt 15 to move, and the movement of the conveyor belt 15 drives the second test rack 13 to slide along the second guide rail 12. The second test rack 13 and the first test rack 7 are connected by a belt 8 bypassing a pulley 11 to achieve synchronous movement. The pulley 11 in this embodiment is equivalent to a fixed pulley.

[0062] Embodiment Three

[0063] Please refer to Figure 7 As shown in the figure, this embodiment discloses a third structure of the spring detection device, which is different from that of the second embodiment in that a third group of springs to be tested 19 is further installed. The third group of springs to be tested 19 is arranged opposite to the second group of springs to be tested 14 and one end of each is connected to the second test rack 13. The other end of the third group of springs to be tested 19 is connected to a hook on the side of the machine body 1 away from the second group of springs to be tested 14.

[0064] The difference in the working process and principle of this embodiment from that of the second embodiment is that when the second group of springs to be tested 14 contracts and moves by itself, the first group of springs to be tested 6 and the third group of springs to be tested 19 perform their own stretching movements; when the second group of springs to be tested 14 moves in its own stretching direction, the first group of springs to be tested 6 and the third group of springs to be tested 19 move in their own contracting directions.

[0065] Compared with the second embodiment, this embodiment has more springs tested simultaneously and higher efficiency. The disadvantage is that it occupies a large space in the length direction of the device and the balance of force during the working process is relatively poor.

[0066] Embodiment Four

[0067] Please refer to Figure 8 As shown in the figure, this embodiment discloses a fourth structure of the spring detection device, which is different from that of the third embodiment in that the motor 10 is directly connected to the pulley 11. The motor 10 directly drives the pulley 11 to rotate, and the rotation of the pulley 11 drives the belt 8 to move. Both ends of the belt 8 are connected to the first test rack 7 and the second test rack 13, and the movement of the belt 8 drives the first test rack 7 and the second test rack 13 to slide.

[0068] Embodiment Five

[0069] Please refer to Figure 9 As shown in the figure, this embodiment is different from the third embodiment in that this embodiment does not have the first group of springs to be tested 6, the pulley 11 and the belt 8. The two groups of springs to be tested are arranged in series. The balance during the working process is better than that of the third embodiment, but the disadvantage is that fewer springs are tested simultaneously and the efficiency is relatively lower. To improve the test efficiency, two more groups of springs with the same settings can be added above the two groups of springs to be tested and installed on the second test rack 13 together.

[0070] In the above embodiments, the pulley 11 can be a belt pulley or a sprocket, the conveyor belt 15 can be a belt 8 or a chain; the warning lamp 4 can be an audible and visual alarm; the sensor can also be arranged on the first fixing bracket 17 or the second fixing bracket 16.

[0071] Please refer to Figure 10 As shown, a spring detection method is applicable to the spring detection device in the above embodiments. The detection steps are as follows: The driving device drives the first test frame 7 to move to the first installation position; the first group of springs to be tested 6 are installed between the first test frame 7 and the first fixing bracket 17; the driving device drives the second test frame 13 to move to the second position; the springs to be tested are installed between the second test frame 13 and the second fixing bracket 16; the control device 3 starts the detection mode; the driving device drives the first test frame 7 and the second test frame 13 to reciprocate along the first guiding device and the second guiding device respectively. When the number of detections reaches the set value, the spring detection device stops testing; when the sensor detects that the spring is broken or the force attenuation amplitude reaches the set threshold, the control device 3 controls the alarm device to emit a warning signal, and the spring detection device stops testing.

[0072] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes, modifications, substitutions and variations, and all these changes, modifications, substitutions and variations fall within the scope of the present invention claimed.

Claims

1. A spring testing device for performing performance testing on tension springs with a maximum working deformation greater than 1 meter. The spring testing device includes a machine body (1) and a fixing frame connected to the machine body (1), characterized in that, It further includes: A guiding device installed inside the machine body (1). The guiding device includes a first guiding device and a second guiding device, and the first guiding device and the second guiding device are arranged in parallel; A test stand, including a first test stand (7) and a second test stand (13). The first test stand (7) is movably installed on the first guiding device, and the second test stand (13) is movably installed on the second guiding device. The first test stand (7) and the second test stand (13) are connected by a connecting mechanism to achieve linkage; A driving device installed inside the machine body (1) for driving the test stand to move along the guiding device; Wherein, a first group of springs to be tested (6) is connected between the first test stand (7) and the fixed stand, and a second group of springs to be tested (14) is connected between the second test stand (13) and the fixed stand. When the first group of springs to be tested (6) is in a stretched or contracted state, the second group of springs to be tested (14) is in a contracted or stretched state; A fixed pulley is provided on the machine body (1). The connecting mechanism is a fixed pulley and a connecting piece connected to the fixed pulley. The first test stand (7) and the second test stand (13) are connected by the connecting piece bypassing the fixed pulley.

2. The spring testing device according to claim 1, characterized in that, The fixed stand includes a first fixed stand (17) and a second fixed stand (16). The first group of springs to be tested (6) is connected between the first test stand (7) and the first fixed stand (17), and the second group of springs to be tested (14) is connected between the second test stand (13) and the second fixed stand (16). The first fixed stand (17) and / or the second fixed stand (16) can be adjusted in position along the moving direction of the test stand.

3. The spring testing device according to claim 1, characterized in that, The driving device is connected to the second test stand (13) through a conveyor belt (15) and drives the second test stand (13) to move along the second guiding device. When the second test stand (13) moves, it drives the first test stand (7) to move along the first guiding device in the opposite direction to the second test stand (13) through the elastic force of the connecting mechanism or the first spring to be tested.

4. The spring testing device according to claim 1, characterized in that, The driving device is connected to the connecting mechanism and drives the connecting mechanism to move. When the connecting mechanism moves, it drives the first test stand (7) to move along the first guiding device and the second test stand (13) to move along the second guiding device, and the moving directions of the first test stand (7) and the second test stand (13) are opposite.

5. The spring testing device according to claim 2, characterized in that, A sensor is provided on the first test stand (7) and / or the second test stand (13). The sensor is connected to the control device (3). When the sensor detects that the spring breaks or the force attenuation amplitude reaches a set threshold, the control device (3) controls the spring detection device to stop the test.

6. The spring testing device according to claim 1, characterized in that, It further includes an alarm device. A sensor is also provided on the first test stand (7) and / or the second test stand (13). The sensor is connected to the alarm device. When the sensor detects that the spring breaks or the force attenuation amplitude reaches a set threshold, the alarm device emits a warning signal.

7. The spring testing device according to claim 4, characterized in that, The driving device is a motor (10), the motor (10) is connected with a pulley (11), the fixed pulley is the pulley (11), the connecting member is a belt (8) that cooperates with the pulley (11), and both ends of the belt (8) are respectively connected to a first test stand (7) and a second test stand (13).

8. The spring testing device according to claim 5, characterized in that, It further includes an alarm device, the alarm device is connected to the control device (3), and when the sensor detects that the spring breaks or the force attenuation amplitude reaches a set threshold, the control device (3) controls the alarm device to emit a warning signal.

9. A spring testing method applicable to the spring testing device according to claim 8, characterized in that, The detection method includes: The driving device drives the first test stand (7) to move to the first installation position; Install the first group of springs to be tested (6) between the first test stand (7) and the first fixing stand (17); The driving device drives the second test stand (13) to move to the second position; Install the second group of springs to be tested (14) between the second test stand (13) and the second fixing stand (16); The control device (3) starts the detection mode; The driving device drives the first test stand (7) and the second test stand (13) to reciprocate along the first guiding device and the second guiding device respectively; When the number of detections reaches the set value, the spring detection device stops testing; When the sensor detects that the spring breaks or the force attenuation amplitude reaches a set threshold, the control device (3) controls the alarm device to emit a warning signal, and the spring detection device stops testing.

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