A testing device and method for the fatigue failure degree of a switch spring

Abstract

The present invention relates to the field of spring fatigue testing equipment, and particularly to a testing device and method for the fatigue failure degree of a switch spring, including a spring fatigue testing device. The spring fatigue testing device includes a bottom bin, inside which a servo motor is arranged. The servo motor is installed inside a mounting seat and is installed on one side of the middle part inside the bottom bin. The driving end at the top of the servo motor is fixedly connected with a driving gear, and one side of the driving gear is meshed with a toothed ring. The toothed ring is fixedly connected to the lower part of the outer circumference of a rotating sleeve. The rotating sleeve is fixedly connected to the middle part of the bottom end of a connecting disc. A plurality of fixed brackets are fixedly connected to the outer circumference of the connecting disc. In the present invention, the top arc at the end of the sliding rod can drive the elastic plate to deform synchronously, so as to change the radian of the elastic plate, enabling people to test the fatigue data of the switch spring body under different compression coefficients, making the test data more comprehensive.

Description

Technical Field

[0001] The present invention relates to the field of spring fatigue testing equipment, and particularly to a testing device and method for the fatigue failure degree of a switch spring. Background Art

[0002] The switch spring belongs to a kind of microswitch component with a very small volume. The switch spring is a mechanical part that works by using elasticity. The switch spring bears a load during operation, and its load force and fatigue resistance directly affect the service life of the switch. The fatigue test of the switch spring mainly conducts fatigue tests on the switch spring by compressing or stretching the switch spring to obtain the fatigue characteristics of the switch spring, so that the appropriate switch spring can be correctly used in different application scenarios. Therefore, the switch spring fatigue test device has become one of the essential devices for switch spring manufacturers and application manufacturers. In the prior art, the switch spring fatigue testing machine cannot conduct fatigue tests on multiple switch springs simultaneously, and the test effect is not ideal. At the same time, the compression or stretching force is often relatively fixed during the test, which is quite inconsistent with the actual manual use, resulting in the test data being quite different from the actual data. Therefore, we propose a testing device and method for the fatigue failure degree of a switch spring to solve the above-mentioned problems. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies in the background art and propose a testing device and method for the fatigue failure degree of a switch spring.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a testing device for the fatigue failure degree of a switch spring, including a spring fatigue testing device. The spring fatigue testing device includes a bottom bin, inside which a servo motor is arranged. The servo motor is installed inside a mounting seat, and the servo motor is installed on one side in the middle of the bottom bin. The top driving end of the servo motor is fixedly connected to a driving gear, and on one side of the driving gear, there is a meshing connection with a toothed ring. The toothed ring is fixedly connected to the lower part of the outer circumference of a rotating sleeve. The rotating sleeve is fixedly connected to the middle of the bottom end of a connecting disk. A plurality of fixing brackets are fixedly connected to the outer circumference of the connecting disk. One end of each fixing bracket far away from the connecting disk is fixedly connected to a first fixing block. Between the first fixing blocks, there are elastic plates arranged. Both ends of the elastic plates are slidably connected in limiting grooves, and the limiting grooves are respectively opened at both ends of the first fixing blocks. On the upper parts of the fixing brackets, there are fixing columns, and the fixing columns are fixedly connected to the outer circumference of a fixing disk.

[0005] Preferably, a stepping motor is installed in the middle of the fixing disk. The bottom driving end of the stepping motor is fixedly connected to a threaded rod, and the bottom of the threaded rod is fixedly connected to a turntable. The turntable is rotatably connected to the middle of the connecting disk, and a threaded block is threadedly connected to the outer circumference of the stepping motor.

[0006] Preferably, a plurality of support rods are rotatably connected to the outer periphery of the threaded block through rotating seats. One ends of the support rods away from the threaded block are rotatably connected to the bottom of the sliding rod through rotating seats. The sliding rods are all slidably connected to the outer periphery of the fixed disk. One ends of the sliding rods away from the fixed disk are fixedly connected with top arcs.

[0007] Preferably, double-headed motors are installed in the middle of the inner parts of the sliding rods near the top arcs. Driving ends of the upper and lower parts of the double-headed motors are fixedly connected with rotating shafts. The rotating shafts are all rotatably connected to the sliding rods. Active gears are fixedly connected to the upper and lower parts of the rotating shafts. One sides of the active gears away from the fixed disk are meshed with tooth grooves. The tooth grooves are all formed in the outer peripheries of the second fixed blocks. The second fixed blocks are all fixedly connected to the middle parts of one ends of the limiting disks close to the sliding rods. The limiting disks and the second fixed blocks are all rotatably connected to the outer peripheries of the vertical sections of the limiting bent rods. One ends of the limiting bent rods close to the sliding rods are all clamped inside the connecting blocks. The connecting blocks are all fixedly connected to the upper and lower sides of the middle parts of one ends of the top arcs close to the fixed disk.

[0008] Preferably, the rotating sleeve is rotatably connected to the middle of the mounting plate. The mounting plate is fixedly connected to the middle part of the bottom bin.

[0009] Preferably, a cover plate is fixedly connected to the top of the bottom bin. An opening is formed in the middle of the cover plate. A mounting ring is fixedly connected to the top of the cover plate. An end cover is clamped to the top of the cover plate through the mounting ring. The end cover is made of a transparent material.

[0010] Preferably, one ends of the limiting bent rods away from the sliding rods are all slidably connected inside the fixed sleeves. The fixed sleeves are all fixedly connected to the upper and lower sides of the middle parts of one ends of the elastic plates close to the fixed disk. Guide grooves are formed in the middle parts of one ends of the limiting disks close to the sliding rods. Guide rods are slidably connected inside the guide grooves. One ends of the guide rods away from the guide grooves are all slidably connected to the upper and lower sides of the middle parts of one ends of the elastic plates close to the fixed disk.

[0011] Preferably, a plurality of limiting seats are installed inside the mounting ring. Limiting sleeves are all slidably connected to the inside of the cover plate. Switch spring bodies are sleeved on the outer peripheries of the limiting sleeves. The switch spring bodies are all arranged between the top columns and the limiting seats. One ends of the limiting sleeves away from the limiting seats are fixedly connected with top columns.

[0012] Preferably, sensors are arranged at one ends of the top columns close to the limiting seats. Limiting rods are slidably connected to the middle parts of one ends of the limiting sleeves away from the top columns. One ends of the limiting rods away from the top columns are all fixedly connected to the inner side walls of the mounting ring.

[0013] Preferably, a method for testing the fatigue failure degree of a switch spring includes the following testing steps:

[0014] S1. During actual use, people first start the stepper motor. The rotation of the stepper motor drives the threaded rod to rotate. When the threaded rod rotates, it drives the threaded block to move up and down. When the threaded rod rotates clockwise, the threaded block is driven to rise. Conversely, when the threaded rod rotates counterclockwise, the threaded block is driven to descend. By first making the threaded rod rotate counterclockwise, the threaded block uses the support rod to drive the slide rod to retract, causing the elastic plate to contract inward. At this time, the ejector post and the limit sleeve are removed from the limit rod. Then, the switch spring body to be tested is sleeved on the outer periphery of the limit sleeve, and the limit sleeve is snapped back onto the limit rod.

[0015] S2. After the switch spring body is installed, start the stepper motor again. Adjust the extension length of each slide rod through the threaded rod. The top arc at the end of the slide rod drives the elastic plate to deform synchronously, changing the arc of the elastic plate, and completing the fatigue data test of the switch spring body under different compression coefficients.

[0016] S3. Start the mounting seat. The mounting seat drives the driving gear to rotate. The driving gear drives the toothed ring meshing with it to rotate. When the toothed ring rotates, it drives the connecting disk to rotate synchronously through the rotating sleeve. The fixed bracket and the fixed column drive the fixed disk, the first fixed block, and the elastic plate to rotate synchronously. When the elastic plate and the first fixed block rotate, they press the contacting ejector post, causing the switch spring bodies on each limit sleeve to be compressed, realizing the fatigue test of the switch spring body.

[0017] S4. When performing the compression fatigue test on the switch spring body, start the double-headed motor. The double-headed motor drives the rotating shaft to rotate. The rotating shaft drives the driving gear to rotate. When the rotating shaft rotates, it drives the second fixed block and the limit disk to rotate synchronously through the tooth groove.

[0018] S5. When the limit disk rotates, adjust the distance between the elastic plate and the top arc through the guide groove on the limit disk via the guide rod, so that during the fatigue test, the arc and position of the elastic plate will change, simulating the situation where the force when people press the switch is not fixed during use.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] After the switch spring body is installed, people can start the stepper motor again. Adjust the extension length of each slide rod through the threaded rod. The top arc at the end of the slide rod can drive the elastic plate to deform synchronously, thereby changing the arc of the elastic plate, enabling people to test the fatigue data of the switch spring body under different compression coefficients, making the test data more comprehensive. At the same time, people can synchronously adjust the compression amount of the switch spring body during the test, which is beneficial to the experimental process and reduces the time wasted on shutdown and debugging.

[0021] In actual use, people can start the mounting base. The mounting base can drive the driving gear to rotate. The driving gear can drive the toothed ring engaged with it to rotate. When the toothed ring rotates, it will drive the connecting plate to rotate synchronously through the rotating sleeve. The fixed bracket and the fixed column can drive the fixed plate, the first fixing block and the elastic plate to rotate synchronously. When the elastic plate and the first fixing block rotate, they will press the contacted ejector pin, so that the switch spring body on each limiting sleeve is compressed. Thus, the fatigue test of the switch spring body can be realized. Through the design of the elastic plate and the first fixing block, when the connecting plate rotates one circle, the switch spring body can experience four compression and rebound processes. Compared with the traditional cam compression test mechanism, the efficiency is higher, which is beneficial to actual use. At the same time, during the test, the elastic plate can be supported by the sliding rod and the top arc, so as to avoid deformation during use and affect the test work.

[0022] When performing the compression fatigue test on the switch spring body, the double-headed motor can drive the rotating shaft to rotate. The rotating shaft can drive the driving gear to rotate. When the rotating shaft rotates, it will drive the second fixing block and the limiting disc to rotate synchronously through the tooth groove. When the limiting disc rotates, the distance between the elastic plate and the top arc can be adjusted through the guide rod by the guide groove on the limiting disc. Thus, during the fatigue test, the radian and position of the elastic plate will change, so as to simulate the actual situation that the force when people press the switch is not fixed during use. Thus, the test data of the switch spring body can be more in line with the actual data, making the test result more accurate and more valuable for reference. Description of the Drawings

[0023] Figure 1 It is the front three-dimensional structure schematic diagram of a switch spring fatigue fault degree test device and method of the present invention;

[0024] Figure 2 It is the partial structure top view schematic diagram of a switch spring fatigue fault degree test device and method of the present invention;

[0025] Figure 3 It is the internal structure schematic diagram of the bottom bin of a switch spring fatigue fault degree test device and method of the present invention;

[0026] Figure 4 It is the partial structure schematic diagram of the limiting sleeve of a switch spring fatigue fault degree test device and method of the present invention;

[0027] Figure 5 It is the partial structure schematic diagram of the threaded rod of a switch spring fatigue fault degree test device and method of the present invention;

[0028] Figure 6Schematic diagram of the local structure at the gear ring of a test device and method for the fatigue failure degree of a switch spring according to the present invention;

[0029] Figure 7 Schematic diagram of the local structure at the limiting groove of a test device and method for the fatigue failure degree of a switch spring according to the present invention;

[0030] Figure 8 Schematic diagram of the local structure at the guide groove of a test device and method for the fatigue failure degree of a switch spring according to the present invention.

[0031] 1. Spring fatigue test device; 101. End cover; 102. Bottom bin; 103. Switch spring main body; 104. Cover plate; 105. Limiting seat; 106. Fixed disk; 107. Elasticity plate; 108. Fixed block one; 109. Fixed column; 110. Installation ring; 111. Fixed support; 112. Top column; 113. Top arc; 114. Driving gear; 115. Servo motor; 116. Installation seat; 117. Rotating sleeve; 118. Gear ring; 119. Connection disk; 120. Limiting rod; 121. Limiting sleeve; 122. Sensor; 123. Threaded rod; 124. Slide bar; 125. Stepper motor; 126. Rotating seat; 127. Limiting bent rod; 128. Limiting disk; 129. Turntable; 130. Support rod; 131. Driving gear; 132. Fixed sleeve; 133. Guide rod; 134. Limiting groove; 135. Rotating shaft; 136. Tooth groove; 137. Guide groove; 138. Connection block; 139. Fixed block two; 140. Threaded block. Detailed implementation manners

[0032] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variations.

[0033] As Figures 1-8A switch spring fatigue fault degree testing device shown in the figure includes a spring fatigue testing device 1. The spring fatigue testing device 1 includes a bottom bin 102. Inside the bottom bin 102, there is a servo motor 115. The servo motor 115 is installed inside a mounting seat 116. The servo motor 115 is installed on one side of the middle part inside the bottom bin 102. The top driving end of the servo motor 115 is fixedly connected to a driving gear 114. One side of the driving gear 114 is meshed with a toothed ring 118. The toothed ring 118 is fixedly connected to the lower part of the outer circumference of a rotating sleeve 117. The rotating sleeve 117 is fixedly connected to the middle part of the bottom end of a connecting disk 119. A plurality of fixing brackets 111 are fixedly connected to the outer circumference of the connecting disk 119. At the ends of the fixing brackets 111 away from the connecting disk 119, there are all fixedly connected with a first fixing block 108. Between the first fixing blocks 108, there are all elastic plates 107. Both ends of the elastic plate 107 are slidably connected in a limiting groove 134. The limiting grooves 134 are all opened at both ends of the first fixing block 108. On the upper parts of the fixing brackets 111, there are all fixing columns 109. The fixing columns 109 are all fixedly connected to the outer circumference of a fixing disk 106.

[0034] Further, in specific implementation, during actual use, people can first start a stepping motor 125. Through the operation of the stepping motor 125, it can drive a threaded rod 123 to rotate. When the threaded rod 123 rotates, it will drive a threaded block 140 to move up and down. When the threaded rod 123 rotates clockwise, the threaded block 140 will be driven to rise. On the contrary, when the threaded rod 123 rotates counterclockwise, the threaded block 140 will be driven to descend. By first making the threaded rod 123 rotate counterclockwise, the threaded block 140 can drive a sliding rod 124 to retract by means of a support rod 130, so that the elastic plate 107 can be contracted inward. At this time, it is convenient for people to remove a top column 112 and a limiting sleeve 121 from a limiting rod 120. Then people can sleeved a switch spring body 103 to be tested on the outer circumference of the limiting sleeve 121, and then snap the limiting sleeve 121 back onto the limiting rod 120.

[0035] Among them, a stepping motor 125 is installed in the middle of the fixing disk 106. The bottom driving end of the stepping motor 125 is fixedly connected to a threaded rod 123. The bottom of the threaded rod 123 is fixedly connected to a turntable 129. The turntable 129 is rotatably connected to the middle part inside the connecting disk 119. The outer circumference of the stepping motor 125 is threadedly connected with a threaded block 140. The outer circumference of the threaded block 140 is rotatably connected to a plurality of support rods 130 through a rotating seat 126. At the ends of the support rods 130 away from the threaded block 140, they are all rotatably connected to the bottom of a sliding rod 124 through a rotating seat 126. The sliding rods 124 are all slidably connected to the outer circumference of the fixing disk 106. At the ends of the sliding rods 124 away from the fixing disk 106, there are all fixedly connected with a top arc 113.

[0036] Further, in specific implementation, after the switch spring body 103 is installed, people can start the stepper motor 125 again to adjust the extension length of each slide bar 124 through the threaded rod 123. The top arc 113 at the end of the slide bar 124 can drive the elastic plate 107 to deform synchronously, so as to change the arc of the elastic plate 107, enabling people to test the fatigue data of the switch spring body 103 under different compression coefficients, making the test data more comprehensive. At the same time, people can synchronously adjust the compression amount of the switch spring body 103 during the test, which is beneficial to the experimental process and reduces the time wasted on shutdown debugging.

[0037] Among them, double-headed motors are installed in the middle of the inner part of one end of each slide bar 124 close to the top arc 113. The upper and lower driving ends of the double-headed motors are fixedly connected with rotating shafts 135. The rotating shafts 135 are rotatably connected to the slide bars 124. The upper and lower parts of the rotating shafts 135 are fixedly connected with driving gears 131. One side of each driving gear 131 away from the fixed disk 106 is meshed with a tooth groove 136. The tooth grooves 136 are all formed on the outer circumference of the second fixing block 139. The second fixing blocks 139 are all fixedly connected to the middle of one end of the limiting disk 128 close to the slide bar 124. The limiting disk 128 and the second fixing block 139 are both rotatably connected to the outer circumference of the vertical section of the limiting bent rod 127. One end of the limiting bent rod 127 close to the slide bar 124 is clamped inside the connecting block 138. The connecting blocks 138 are all fixedly connected to the upper and lower sides of the middle of one end of the top arc 113 close to the fixed disk 106. One end of the limiting bent rod 127 away from the slide bar 124 is slidably connected inside the fixed sleeve 132. The fixed sleeves 132 are all fixedly connected to the upper and lower sides of the middle of one end of the elastic plate 107 close to the fixed disk 106. Guide grooves 137 are formed at one end of the limiting disk 128 close to the slide bar 124. Guide rods 133 are slidably connected inside the guide grooves 137. One end of each guide rod 133 away from the guide groove 137 is slidably connected to the upper and lower sides of the middle of one end of the elastic plate 107 close to the fixed disk 106;

[0038] Further, in specific implementation, when performing compression fatigue testing on the switch spring body 103, people can start the double-headed motor. The double-headed motor can drive the rotating shaft 135 to rotate. The rotating shaft 135 can drive the driving gear 131 to rotate. When the rotating shaft 135 rotates, it will drive the second fixing block 139 and the limiting disk 128 to rotate synchronously through the tooth groove 136. When the limiting disk 128 rotates, the distance between the elastic plate 107 and the top arc 113 can be adjusted through the guide rod 133 by the guide groove 137 on the limiting disk 128. Thus, during fatigue testing, the arc and position of the elastic plate 107 will change, so as to simulate the actual situation where the force applied by people when pressing the switch is not fixed during use. Therefore, the test data of the switch spring body 103 can be more in line with the actual data, making the test results more accurate and more valuable for reference.

[0039] Among them, the rotating sleeve 117 is rotatably connected to the middle of the mounting plate. The mounting plate is fixedly connected to the middle inside the bottom bin 102. A cover plate 104 is fixedly connected to the top of the bottom bin 102. An opening is provided in the middle of the cover plate 104. An installation ring 110 is fixedly connected to the top of the cover plate 104. An end cover 101 is clamped to the top of the cover plate 104 through the installation ring 110. The end cover 101 is made of a transparent material;

[0040] Furthermore, in specific implementation, during testing, the elastic plate 107 can be supported by the sliding rod 124 and the top arc 113, so as to avoid deformation of 1107 during use and affect the testing work. At the same time, during actual use, through the transparent end cover 101, people can conveniently observe the testing situation of the switch spring body 103.

[0041] Among them, a plurality of limit seats 105 are installed inside the installation ring 110. The inner sides of the cover plates 104 are all slidably connected with limit sleeves 121. Switch spring bodies 103 are sleeved on the outer peripheries of the limit sleeves 121. The switch spring bodies 103 are all arranged between the top posts 112 and the limit seats 105. A top post 112 is fixedly connected to one end of the limit sleeve 121 away from the limit seat 105. A sensor 122 is arranged at one end of the top post 112 close to the limit seat 105. A limit rod 120 is slidably connected to the middle of the end of the limit sleeve 121 away from the top post 112. One ends of the limit rods 120 away from the top posts 112 are fixedly connected to the inner side walls of the installation rings 110;

[0042] Furthermore, in specific implementation, during actual use, people can start the mounting seat 116. Through the mounting seat 116, the driving gear 114 can be driven to rotate. Through the driving gear 114, the toothed ring 118 engaged with it can be driven to rotate. When the toothed ring 118 rotates, the connecting disk 119 can be driven to rotate synchronously through the rotating sleeve 117. Through the fixed bracket 111 and the fixed column 109, the fixed disk 106, the first fixing block 108 and the elastic plate 107 can be driven to rotate synchronously. When the elastic plate 107 and the first fixing block 108 rotate, the contacted top posts 112 will be pressed, so that the switch spring bodies 103 on each limit sleeve 121 will be compressed, thereby realizing the fatigue test of the switch spring bodies 103. Through the design of the elastic plate 107 and the first fixing block 108, when the connecting disk 119 rotates one circle, the switch spring body 103 can experience four compression and rebound processes. Compared with the traditional cam compression test mechanism, the efficiency is higher and it is beneficial to actual use. During actual testing, through the sensor 122, the rebound force of the switch spring body 103 after compression can be felt, which is beneficial to supplement the test data of the switch spring body 103.

[0043] Among them, a method for testing the fatigue failure degree of a switch spring includes the following test steps:

[0044] S1. During actual use, people first start the stepping motor 125. The rotation of the stepping motor 125 drives the threaded rod 123 to rotate. When the threaded rod 123 rotates, it drives the threaded block 140 to move up and down. When the threaded rod 123 rotates clockwise, the threaded block 140 is driven to rise. Conversely, when the threaded rod 123 rotates counterclockwise, the threaded block 140 is driven to descend. By first making the threaded rod 123 rotate counterclockwise, the threaded block 140 drives the sliding rod 124 to retract by means of the support rod 130, causing the elastic plate 107 to contract inward. At this time, the top column 112 and the limit sleeve 121 are removed from the limit rod 120. Then, the switch spring body 103 to be tested is sleeved on the outer periphery of the limit sleeve 121, and then the limit sleeve 121 is snapped back onto the limit rod 120.

[0045] S2. After the switch spring body 103 is installed, the stepping motor 125 is started again. The extension length of each sliding rod 124 is adjusted through the threaded rod 123. The top arc 113 at the end of the sliding rod 124 drives the elastic plate 107 to deform synchronously, changing the arc of the elastic plate 107, and completing the test of the fatigue data of the switch spring body 103 under different compression coefficients.

[0046] S3. Start the mounting seat 116. The mounting seat 116 drives the driving gear 114 to rotate. The driving gear 114 drives the toothed ring 118 meshing with it to rotate. When the toothed ring 118 rotates, it drives the connecting disk 119 to rotate synchronously through the rotating sleeve 117. The fixed disk 106, the first fixing block 108, and the elastic plate 107 are driven to rotate synchronously through the fixed bracket 111 and the fixed column 109. When the elastic plate 107 and the first fixing block 108 rotate, they press the contacting top column 112, causing the switch spring body 103 on each limit sleeve 121 to be compressed, realizing the fatigue test of the switch spring body 103.

[0047] S4. When performing the compression fatigue test on the switch spring body 103, start the double-headed motor. The double-headed motor drives the rotating shaft 135 to rotate. The rotating shaft 135 drives the driving gear 131 to rotate. When the rotating shaft 135 rotates, it drives the second fixing block 139 and the limit disk 128 to rotate synchronously through the tooth groove 136.

[0048] S5. When the limit disk 128 rotates, the distance between the elastic plate 107 and the top arc 113 is adjusted through the guide groove 137 on the limit disk 128 by means of the guide rod 133, so that during the fatigue test, the arc and position of the elastic plate 107 will change, simulating the situation where the force applied by people when pressing the switch is not fixed during use.

[0049] Working principle:

[0050] In actual use, people can first start the stepper motor 125. The operation of the stepper motor 125 can drive the threaded rod 123 to rotate. When the threaded rod 123 rotates, it will drive the threaded block 140 to move up and down. When the threaded rod 123 rotates clockwise, the threaded block 140 will be driven to rise. On the contrary, when the threaded rod 123 rotates counterclockwise, the threaded block 140 will be driven to descend. By first making the threaded rod 123 rotate counterclockwise, the threaded block 140 can drive the slide rod 124 to retract by means of the support rod 130, so that the elastic plate 107 can contract inward. At this time, it is convenient for people to remove the ejector post 112 and the limit sleeve 121 from the limit rod 120. Then, people can sleeved the switch spring body 103 to be tested on the outer periphery of the limit sleeve 121 and then snap the limit sleeve 121 back onto the limit rod 120. After the installation of the switch spring body 103 is completed, people can start the stepper motor 125 again to adjust the extension length of each slide rod 124 through the threaded rod 123. The top arc 113 at the end of the slide rod 124 can drive the elastic plate 107 to deform synchronously, so as to change the arc of the elastic plate 107, enabling people to test the fatigue data of the switch spring body 103 under different compression coefficients, making the test data more comprehensive. At the same time, people can synchronously adjust the compression amount of the switch spring body 103 during the test, which is beneficial to the experimental process and reduces the time wasted in shutdown debugging. In actual use, people can start the mounting seat 116. The mounting seat 116 can drive the driving gear 114 to rotate. The driving gear 114 can drive the toothed ring 118 engaged with it to rotate. When the toothed ring 118 rotates, it will drive the connecting disk 119 to rotate synchronously through the rotating sleeve 117. The fixed bracket 111 and the fixed column 109 can drive the fixed disk 106, the first fixed block 108 and the elastic plate 107 to rotate synchronously. When the elastic plate 107 and the first fixed block 108 rotate, they will press the contacted ejector post 112, so that the switch spring bodies 103 on each limit sleeve 121 are compressed, thus realizing the fatigue test of the switch spring body 103. The design of the elastic plate 107 and the first fixed block 108 enables the switch spring body 103 to experience four compression and rebound processes when the connecting disk 119 rotates one circle. Compared with the traditional cam compression test mechanism, the efficiency is higher and it is beneficial to actual use. At the same time, during the test, the slide rod 124 and the top arc 113 can support the elastic plate 107, so as to avoid the deformation of 1107 during use and affect the test work. At the same time, when performing the compression fatigue test on the switch spring body 103, people can start the double-headed motor. The double-headed motor can drive the rotating shaft 135 to rotate. The rotating shaft 135 can drive the driving gear 131 to rotate. When the rotating shaft 135 rotates, it will drive the second fixed block 139 and the limit disk 128 to rotate synchronously through the tooth groove 136. When the limit disk 128 rotates,The distance between the elastic plate 107 and the top arc 113 can be adjusted through the guide rod 133 by means of the guide groove 137 on the limit disc 128. Thus, during the fatigue test, the curvature and position of the elastic plate 107 will change, so as to simulate the actual situation where the force applied by people when pressing the switch is not fixed during use. As a result, the test data of the switch spring body 103 can be more in line with the actual data, making the test results more accurate and more valuable for reference.

[0051] 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 is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A switch spring fatigue failure degree testing device, comprising a spring fatigue testing device (1), characterized in that: The spring fatigue testing device (1) comprises a bottom bin (102), a servo motor (115) being arranged inside the bottom bin (102), the servo motor (115) being mounted inside a mounting seat (116), the servo motor (115) being mounted on one side of the middle portion of the bottom bin (102), the top driving end of the servo motor (115) being fixedly connected to a driving gear (114), one side of the driving gear (114) being meshingly connected to a gear ring (118), the gear ring (118) being fixedly connected to the lower portion of the outer periphery of a rotating sleeve (117), the rotating sleeve (117) being fixedly connected to the middle portion of the bottom end of a connecting plate (119), the outer periphery of the connecting plate (119) being fixedly connected to a plurality of fixing brackets (111), the fixing brackets (111) being fixedly connected to the outer periphery of the connecting plate (119), the fixing brackets (111) being fixedly connected to the lower portion of the outer periphery of the rotating sleeve (117), and the fixing brackets (111) being fixedly connected to the lower portion of the outer periphery of the connecting plate (119). One end of the fixed bracket (111) away from the connecting disk (119) is fixedly connected to a fixed block (108), an elastic plate (107) is arranged between the fixed blocks (108), both ends of the elastic plate (107) are slidably connected to the limit groove (134), and the limit groove (134) is opened at both ends of the fixed block (108). A fixed column (109) is arranged on the upper part of the fixed bracket (111), and the fixed column (109) is fixedly connected to the outer periphery of the fixed disk (106). A stepper motor (125) is installed in the middle of the fixed disk (106), and a threaded rod (123) is fixedly connected to the bottom driving end of the stepper motor (125), and a rotating disk (106) is fixedly connected to the bottom of the threaded rod (123). 129), the rotating disk (129) is rotatably connected to the middle part of the connecting disk (119), the outer periphery of the stepping motor (125) is threadedly connected to a threaded block (140), the outer periphery of the threaded block (140) is rotatably connected to a plurality of support rods (130) through a rotating seat (126), the ends of the support rods (130) away from the threaded block (140) are rotatably connected to the bottom of the sliding rod (124) through the rotating seat (126), the sliding rods (124) are slidably connected to the outer periphery of the fixed disk (106), the ends of the sliding rods (124) away from the fixed disk (106) are fixedly connected to the top arc (113), the top of the bottom bin (102) is fixedly connected to the cover plate (104), and the top of the cover plate (104) is fixedly connected to A mounting ring (110) is connected, a plurality of limit seats (105) are mounted on the inner side of the mounting ring (110), the inner side of the cover plate (104) is slidably connected to a limit sleeve (121), the outer circumference of the limit sleeve (121) is sleeved with a switch spring body (103), the switch spring body (103) is arranged between a top column (112) and the limit seat (105), one end of the limit sleeve (121) away from the limit seat (105) is fixedly connected to the top column (112), the middle part of one end of the limit sleeve (121) away from the top column (112) is slidably connected to a limit rod (120), and one end of the limit rod (120) away from the top column (112) is fixedly connected to the inner wall of the mounting ring (110).

2. A switch spring fatigue failure degree testing device according to claim 1, characterized in that: A double-headed motor is installed in the middle of one end of the slide bar (124) close to the top arc (113), and the upper and lower driving ends of the double-headed motor are fixedly connected to a rotating shaft (135), and the rotating shaft (135) is rotatably connected to the slide bar (124). The upper and lower parts of the rotating shaft (135) are fixedly connected to a driving gear (131), and the side of the driving gear (131) away from the fixed plate (106) is meshed with a tooth groove (136), and the tooth groove (136) is provided on the fixed plate (106). The outer periphery of the second fixed block (139), the second fixed block (139) is fixedly connected to the middle of one end of the limit plate (128) close to the sliding rod (124), the limit plate (128) and the second fixed block (139) are rotatably connected to the outer periphery of the vertical section of the limit bending rod (127), one end of the limit bending rod (127) close to the sliding rod (124) is engaged in the inside of the connecting block (138), and the connecting block (138) is fixedly connected to the upper and lower sides of the middle of one end of the top arc (113) close to the fixed plate (106).

3. A switch spring fatigue failure degree testing device according to claim 2, characterized in that: The rotating sleeve (117) is rotatably connected to the middle of the mounting plate, and the mounting plate is fixedly connected to the middle of the bottom bin (102).

4. A switch spring fatigue failure degree testing device according to claim 3, characterized in that: An opening is provided in the middle of the cover plate (104), and an end cover (101) is engaged with the top of the cover plate (104) via a mounting ring (110), wherein the end cover (101) is made of a transparent material.

5. A switch spring fatigue failure degree testing device according to claim 4, characterized in that: The end of the limit bending rod (127) away from the sliding rod (124) is slidably connected to the inside of the fixed sleeve (132), and the fixed sleeve (132) is fixedly connected to the upper and lower sides of the middle part of one end of the elastic plate (107) close to the fixed plate (106). The end of the limit plate (128) close to the sliding rod (124) is provided with a guide groove (137), and the inside of the guide groove (137) is slidably connected with a guide rod (133), and the end of the guide rod (133) away from the guide groove (137) is slidably connected to the upper and lower sides of the middle part of one end of the elastic plate (107) close to the fixed plate (106).

6. A switch spring fatigue failure degree testing device according to claim 5, characterized in that: A sensor (122) is provided at one end of the top column (112) close to the limit seat (105).

7. A switch spring fatigue failure degree testing method, applied to a switch spring fatigue failure degree testing device as claimed in claim 6, characterized in that: The test steps include: S1. In actual use, people first start the stepper motor (125), and the stepper motor (125) drives the threaded rod (123) to rotate. When the threaded rod (123) rotates, it drives the threaded block (140) to move up and down. When the threaded rod (123) rotates clockwise, the threaded block (140) is driven to rise. Conversely, when the threaded rod (123) rotates counterclockwise, the threaded block (140) is driven to fall. The threaded rod (123) rotates counterclockwise, and the threaded block (140) and the support rod (130) are used to drive the slide rod (124) to retract, so that the elastic plate (107) is retracted inwardly. At this time, the top column (112) and the limiting sleeve (121) are removed from the limiting rod (120), and then the switch spring body (103) to be tested is sleeved on the outer periphery of the limiting sleeve (121), and then the limiting sleeve (121) is clamped back onto the limiting rod (120); S2. After the switch spring body (103) is installed, the stepper motor (125) is started again, and the extension length of each slide rod (124) is adjusted through the threaded rod (123). The top arc (113) at the end of the slide rod (124) drives the elastic plate (107) to deform synchronously, and the curvature of the elastic plate (107) is changed, so as to complete the fatigue data test of the switch spring body (103) under different compression coefficients; S3, starting the mounting seat (116), driving the driving gear (114) to rotate through the mounting seat (116), driving the gear ring (118) meshing with the gear ring (114) to rotate, when the gear ring (118) rotates, it drives the connecting disk (119) to rotate synchronously through the rotating sleeve (117), drives the fixed disk (106) and the fixed block (108) and the elastic plate (107) to rotate synchronously through the fixed bracket (111) and the fixed column (109), when the elastic plate (107) and the fixed block (108) rotate, they press the contacting top column (112) to compress the switch spring body (103) on each limiting sleeve (121), thereby achieving fatigue testing of the switch spring body (103); S4. When the switch spring body (103) is subjected to a compression fatigue test, the double-headed motor is started, the rotating shaft (135) is driven to rotate by the double-headed motor, and the driving gear (131) is driven to rotate by the rotating shaft (135). When the rotating shaft (135) rotates, the fixed block 2 (139) and the limit plate (128) are driven to rotate synchronously through the tooth groove (136); S5. When the limit plate (128) rotates, the distance between the elastic plate (107) and the top arc (113) is adjusted through the guide groove (137) on the limit plate (128) through the guide rod (133), so that when the fatigue test is performed, the curvature and position of the elastic plate (107) will change, simulating the situation that the force used by people to press the switch is not fixed during use.

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