Elasticity testing device and method of use of a shaft pin sensor

Abstract

This invention relates to the field of spring elasticity testing technology, and discloses an elasticity testing device and a method for using a pin-type sensor. A vertical spring is conveyed onto a conveyor belt, which then transfers it to a pick-and-place claw. The pick-and-place claw receives the spring and moves it to the testing position. A second testing rod presses down on the spring. Simultaneously, after the spring is pressed against the first testing rod, the pick-and-place claw opens, and the first testing rod performs an elasticity test on the spring. This method utilizes the pick-and-place claw to stably deliver the spring to the testing position, avoiding inaccurate spring positioning caused by manual assistance, which reduces test quality and improves overall testing efficiency.

Description

Technical Field

[0001] This invention relates to the field of spring elasticity testing technology, specifically to an elasticity testing device and a method for using a pin-type sensor. Background Technology

[0002] Currently, the elasticity test of elastomers on the market requires applying test actions, such as applying pressure, to the elastomer through testing equipment to obtain pressure information, displacement information, and test time domain information of the elastomer during the test process. This information is then collected and input into a computer, and the elasticity value of the elastomer is obtained through calculation.

[0003] Existing elasticity testing devices, such as Chinese patent application CN112611494A, employ a base plate with a vertically mounted column fixedly connected to it. The column is connected to a movable seat that can move vertically. The movable seat is connected to a drive assembly that drives its movement. The drive assembly is fixedly connected to the column. A pressure block is connected to the lower end of the movable seat. The lower surface of the pressure block is a curved surface that at least partially convexes downwards. A pressure sensor is located between the pressure block and the movable seat. When the drive assembly moves the movable seat, it can cause the pressure block to move accordingly. Mattress material is positioned below the pressure block. When the curved surface of the pressure block contacts the mattress material, the pressure sensor measures the pressure exerted by the pressure block on the mattress material. Utilizing the downwardly convex lower surface of the pressure block, it can accurately match the shape of different parts of the human body, thus allowing for more precise measurement of the elastic support force of the mattress material when different parts of the human body press against it. This method is simple in structure, convenient to use, and provides accurate measurements.

[0004] However, the following problems still exist: the elasticity test requires manual connection of the elastic components to the device in sequence for elasticity testing. The manual assistance results in low overall testing efficiency of the device, and improper manual installation can also lead to inaccurate test results. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an elasticity testing device and a method for using a pin-type sensor. It features the advantage of using a pick-and-place claw to stably deliver the spring to the testing position, avoiding inaccurate spring positioning caused by manual assistance, which reduces test quality and improves overall testing efficiency. This invention solves the problems of requiring manual connection of elastic components to the device for elasticity testing, resulting in low overall testing efficiency and inaccurate test results if manual installation is not performed correctly.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an elasticity testing device, comprising a base, a testing mechanism disposed on the base, and an auxiliary mechanism disposed on the testing mechanism. The testing mechanism includes a first detection rod and a second detection rod. The first detection rod is disposed on the base, and the second detection rod is disposed on the base. The second detection rod is located directly above the first detection rod. The second detection rod moves toward the first detection rod and compresses the spring between the first detection rod and the second detection rod. The first detection rod detects the elasticity of the spring.

[0007] The auxiliary mechanism includes a pick-and-place claw and a conveyor belt. The pick-and-place claw rotates, and its movement trajectory covers the top of the first detection rod and the conveyor belt. The pick-and-place claw transfers the spring conveyed by the conveyor belt to the first detection rod. When the spring is being tested for elasticity, the pick-and-place claw opens to avoid the detection position of the spring.

[0008] Preferably, the testing mechanism further includes a support column, which is fixedly installed on the base. The support column is symmetrically arranged in two parts on both sides of the base. The support column is hollow. A base frame is provided between the two support columns. The base frame is located at the lower end of the support column. The two ends of the base frame are fixedly connected to the support columns on each side. The first detection rod is slidably fitted at the top of the base frame. The first detection rod passes through the base frame. A pin-type sensor is provided at the bottom of the base frame. The bearing end of the pin-type sensor is fixedly connected to the base frame. The force detection end of the pin-type sensor is fixedly connected to the bottom end of the first detection rod.

[0009] Preferably, a top frame is provided between the two pillars, the top frame is located at the upper end of the pillar, the top frame is located directly above the base frame, both ends of the top frame penetrate the wall surface of the pillars on each side, the top frame slides with the pillar, and the bottom end of the top frame is fixedly installed with the second detection rod, the size of the second detection rod is adapted to the size of the first detection rod, and the top end of the first detection rod is the detection position of the spring.

[0010] Preferably, each of the support columns is rotatably fitted with a screw, the top end of which is connected to the inner top end of the support column, and the bottom end of which penetrates the support column and the wall of the base. A pulley is fixedly mounted on the bottom end of each screw, and a toothed belt is tensioned on both sides of the pulleys, meshing with the pulleys. A stepper motor is fixedly mounted inside the base, and a drive gear is fixedly mounted on the shaft of the stepper motor. A driven gear is fixedly mounted on one side of the pulley, the driven gear being larger than the drive gear, and meshing with the drive gear.

[0011] Preferably, a control display is fixedly installed on the support column, and the control display is used to control the operation of the testing device.

[0012] Preferably, the auxiliary mechanism further includes a fixing frame, which is fixedly installed on the support column on one side. The fixing frame is sleeved on the support column and has a circular structure. The fixing frame is located above the first detection rod. A ring frame is sleeved on the fixing frame and slides with the fixing frame. A gear ring is fixedly installed at the bottom end of the ring frame. The size of the gear ring is adapted to the size of the ring frame, and the tooth surface of the gear ring is located at the bottom end. A servo motor is fixedly installed on the support column and is located below the gear ring. A bevel gear is fixedly installed on the shaft of the servo motor and meshes with the gear ring.

[0013] Preferably, the ring frame is provided with a plurality of pick-and-place claws, which are evenly distributed on the ring frame. Each pick-and-place claw is arranged symmetrically adjacent to two parts. The front end of the pick-and-place claw is rotatably engaged with the rear end of the pick-and-place claw, and the rear end of the pick-and-place claw is connected to the ring frame. The pick-and-place claw has a scissor-shaped structure. A tension spring is provided between the two parts of the pick-and-place claw. The two ends of the tension spring are respectively connected to the two parts of the pick-and-place claw. The tension spring is located on the front end of the pick-and-place claw.

[0014] Preferably, a rod is fixedly installed at the bottom of the top frame, and an insertion port is provided on the front end of the two parts of the pick-and-place claw. The rod corresponds to the insertion port on the pick-and-place claw when it is rotated to the detection position. The size of the rod is adapted to the size of the insertion port. When the rod is inserted into the insertion port, the front end of the pick-and-place claw opens. A blocking member is fixedly installed on the support column. The blocking member is located above the movement trajectory of the pick-and-place claw and blocks the spring after detection.

[0015] Preferably, a side frame is fixedly installed on the support column, and multiple conveyor rollers are rotatably fitted on the side frame. The conveyor belt is tensioned on the conveyor rollers. The end of the conveyor belt's conveying path is adjacent to the moving trajectory of the pick-and-place claw, so that the conveyor belt conveys the vertical spring to the pick-and-place claw. A conveyor motor is fixedly installed on the side frame and is poweredly connected to the conveyor rollers. A guide limiting plate is fixedly installed on the side frame. The guide limiting plate is located on the conveyor belt's conveying path and is symmetrically arranged in two parts on both sides of the conveyor belt. The guide limiting plate guides the vertical spring to the pick-and-place claw.

[0016] A method for using a pivot pin type sensor, employing the aforementioned elasticity testing device, includes the following steps:

[0017] S1: The vertical spring is conveyed onto the conveyor belt, and the conveyor belt conveys the vertical spring onto the pick-and-place claw;

[0018] S2: The pick-and-place claw receives the vertical spring and moves the vertical spring to the detection position;

[0019] S3: The second detection rod presses down on the vertical spring. At the same time, after the spring is pressed on the first detection rod, the pick-and-place claws open, and then the first detection rod uses the pin-type sensor to perform an elasticity test on the spring.

[0020] Compared with the prior art, the present invention provides an elasticity testing device with the following advantages:

[0021] 1. This elasticity testing device delivers a vertical spring onto a conveyor belt, which then transfers the spring to a pick-and-place claw. The pick-and-place claw receives the spring and moves it to the testing position. A second testing rod presses down on the spring. Simultaneously, after the spring is pressed against the first testing rod, the pick-and-place claw opens, and the first testing rod performs an elasticity test on the spring. This method utilizes the pick-and-place claw to stably deliver the spring to the testing position, avoiding inaccurate spring positioning caused by manual assistance, which would reduce test quality and improve overall testing efficiency.

[0022] 2. This elasticity testing device, through the setting of the pin-type sensor, utilizes force transmission to transmit the elastic force to the force detection end of the pin-type sensor, thereby improving the quality of spring elasticity testing by utilizing the accuracy of the pin-type sensor.

[0023] 3. This elasticity testing device, through the setting of the guide limit plate, can stably transfer the spring to the pick-and-place claw when the conveyor belt is transporting the spring, while avoiding the spring from tipping over, thus improving the stability of the testing device operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the testing device of the present invention;

[0025] Figure 2 This is a schematic diagram of the testing mechanism structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the structural distribution at the pin-type sensor of the present invention;

[0027] Figure 4 This is a schematic diagram of the structural distribution at the screw of the present invention;

[0028] Figure 5 This is a schematic diagram of the internal structure distribution of the base of the present invention;

[0029] Figure 6 for Figure 5 Enlarged structural diagram at point A in the middle;

[0030] Figure 7 This is a schematic diagram of the auxiliary mechanism structure of the present invention;

[0031] Figure 8 This is a schematic diagram of the structural distribution at the insertion point of the present invention;

[0032] Figure 9 This is a schematic diagram of the structural distribution at the fixing frame of the present invention;

[0033] Figure 10 This is a schematic diagram of the structural distribution at the pick-and-place claw of the present invention;

[0034] Figure 11 This is a schematic diagram of the structural distribution at the blocking component of the present invention;

[0035] Figure 12 This is a schematic diagram of the structural distribution at the conveyor belt of the present invention.

[0036] In the diagram: 1. Base; 2. Testing mechanism; 21. Support column; 22. Base frame; 23. First detection rod; 24. Pin-type sensor; 25. Top frame; 26. Second detection rod; 27. Screw; 28. Pulley; 29. ​​Toothed belt; 210. Stepper motor; 211. Power gear; 212. Driven gear; 213. Control display; 3. Auxiliary mechanism; 31. Fixing frame; 32. Ring frame; 33. Gear ring; 34. Servo motor; 35. Bevel gear; 36. Pick-and-place claw; 37. Tension spring; 38. Insert rod; 39. Insertion port; 310. Barrier component; 311. Side frame; 312. Conveyor roller; 313. Conveyor belt; 314. Conveyor motor; 315. Guide limit plate. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] As described in the background section, there are shortcomings in the existing technology. In order to solve the above-mentioned technical problems, this application proposes an elasticity testing device and a method for using a pin-type sensor.

[0039] Example 1, a typical implementation of this application, such as Figure 1As shown, an elasticity testing device includes a base 1, a testing mechanism 2 disposed on the base 1, and an auxiliary mechanism 3 disposed on the testing mechanism 2. The testing mechanism 2 includes a first detection rod 23 and a second detection rod 26. The first detection rod 23 is disposed on the base 1, and the second detection rod 26 is disposed on the base 1. The second detection rod 26 is located directly above the first detection rod 23. The second detection rod 26 moves closer to the first detection rod 23 and compresses the spring between the first detection rod 23 and the second detection rod 26. The first detection rod 23 detects the elasticity of the spring.

[0040] The auxiliary mechanism 3 includes a pick-and-place claw 36 and a conveyor belt 313. The pick-and-place claw 36 rotates, and its movement trajectory covers the top of the first detection rod 23. The pick-and-place claw 36 also covers the conveyor belt 313. The pick-and-place claw 36 transfers the spring conveyed by the conveyor belt 313 to the first detection rod 23. When the spring is being tested for elasticity, the pick-and-place claw 36 opens to avoid the detection position of the spring.

[0041] When using this invention:

[0042] The vertical spring is conveyed onto the conveyor belt 313, which then transfers it to the pick-and-place claw 36. The pick-and-place claw 36 receives the vertical spring and moves it to the detection position. The second detection rod 26 presses down on the vertical spring. Simultaneously, after the spring is pressed onto the first detection rod 23, the pick-and-place claw 36 opens, and the first detection rod 23 performs an elasticity test on the spring. This process utilizes the pick-and-place claw 36 to stably deliver the spring to the detection position, avoiding inaccurate spring positioning caused by manual assistance, which would reduce test quality and improve overall testing efficiency.

[0043] Example 2, as Figures 2-6 As shown, the difference from the above embodiment is that the testing mechanism 2 also includes a support column 21. The support column 21 is fixedly installed on the base 1. The support column 21 is symmetrically arranged on both sides of the base 1 in two parts. The support column 21 is hollow. A base frame 22 is arranged between the two support columns 21. The base frame 22 is located at the lower end of the support column 21. The two ends of the base frame 22 are fixedly connected to the support column 21 on each side. A first detection rod 23 is slidably fitted at the top of the base frame 22. The first detection rod 23 passes through the base frame 22. A pin-type sensor 24 is arranged at the bottom of the base frame 22. The bearing end of the pin-type sensor 24 is fixedly connected to the base frame 22. The force detection end of the pin-type sensor 24 is fixedly connected to the bottom end of the first detection rod 23.

[0044] Furthermore, a top frame 25 is provided between the two side pillars 21. The top frame 25 is located at the upper end of the pillars 21 and directly above the base frame 22. Both ends of the top frame 25 penetrate the wall surface of each side pillar 21. The top frame 25 slides with the pillars 21. A second detection rod 26 is fixedly installed at the bottom end of the top frame 25. The size of the second detection rod 26 is adapted to the size of the first detection rod 23. The top end of the first detection rod 23 is the detection position of the spring.

[0045] Furthermore, each support column 21 is rotatably fitted with a screw 27. The top end of the screw 27 is connected to the inner top end of the support column 21, and the bottom end of the screw 27 penetrates the support column 21 and the wall of the base 1. Each bottom end of the screw 27 is fixedly mounted with a pulley 28. Toothed belts 29 are tensioned on the pulleys 28 on both sides and mesh with the pulleys 28. A stepper motor 210 is fixedly mounted inside the base 1. A drive gear 211 is fixedly mounted on the shaft of the stepper motor 210. A driven gear 212 is fixedly mounted on one side of the pulley 28. The size of the driven gear 212 is larger than that of the drive gear 211, and the driven gear 212 meshes with the drive gear 211.

[0046] Furthermore, a control display 213 is fixedly installed on the support column 21, and the control display 213 is used to control the operation of the testing device.

[0047] During the spring test, the control display 213 controls the activation of the elasticity testing device. When the spring moves vertically onto the first detection rod 23, the stepper motor 210 is activated. The stepper motor 210 drives the power gear 211 to rotate, which in turn drives the driven gear 212 to rotate. The driven gear 212 drives the pulley 28 to rotate, which in turn drives the toothed belt 29 to rotate. The toothed belt 29 drives all the pulleys 28 to rotate, which in turn drives the screw 27 to rotate. The screw 27 drives the top frame 25 to move on the support column 21. The top frame 25 drives the second detection rod 26 to move towards the first detection rod 23, thus pressing the spring vertically onto the first detection rod 23. This causes the spring to compress and the restoring force to press the first detection rod 23. The first detection rod 23 transmits the force to the pin-type sensor 24 to perform the elasticity test on the spring.

[0048] Example 3, as Figures 7-12As shown, the difference from the above embodiment is that the auxiliary mechanism 3 also includes a fixing frame 31. The fixing frame 31 is fixedly installed on the support column 21 on one side. The fixing frame 31 is sleeved on the support column 21. The fixing frame 31 has a circular structure and is located above the first detection rod 23. A ring frame 32 is sleeved on the fixing frame 31. The ring frame 32 and the fixing frame 31 are slidably engaged. A gear ring 33 is fixedly installed at the bottom end of the ring frame 32. The size of the gear ring 33 is adapted to the size of the ring frame 32. The tooth surface of the gear ring 33 is located at the bottom end. A servo motor 34 is fixedly installed on the support column 21. The servo motor 34 is located below the gear ring 33. A bevel gear 35 is fixedly installed on the shaft of the servo motor 34. The bevel gear 35 meshes with the gear ring 33.

[0049] Furthermore, the ring frame 32 is provided with multiple pick-and-place claws 36, which are evenly distributed on the ring frame 32. Each pick-and-place claw 36 is arranged symmetrically adjacent to two parts. The front end of the pick-and-place claw 36 is rotatably engaged with the rear end of the pick-and-place claw 36. The rear end of the pick-and-place claw 36 is connected to the ring frame 32. The pick-and-place claw 36 has a scissor-shaped structure. A tension spring 37 is provided between the two parts of the pick-and-place claw 36. The two ends of the tension spring 37 are respectively connected to the two parts of the pick-and-place claw 36. The tension spring 37 is located on the front end of the pick-and-place claw 36.

[0050] Furthermore, a rod 38 is fixedly installed at the bottom of the top frame 25, and an insertion port 39 is opened on the front end of the two parts of the pick-and-place claw 36. The rod 38 corresponds to the insertion port 39 on the pick-and-place claw 36 when it is rotated to the detection position. The size of the rod 38 is adapted to the size of the insertion port 39. When the rod 38 is inserted into the insertion port 39, the front end of the pick-and-place claw 36 opens. A blocking member 310 is fixedly installed on the support column 21. The blocking member 310 is located above the moving trajectory of the pick-and-place claw 36 and blocks the spring after detection.

[0051] Furthermore, a side frame 311 is fixedly installed on the support column 21, and multiple conveyor rollers 312 are rotatably fitted on the side frame 311. A conveyor belt 313 is tensioned on the overall conveyor rollers 312. The end of the conveying path of the conveyor belt 313 is adjacent to the moving trajectory of the pick-and-place claw 36, so that the conveyor belt 313 conveys the vertical spring to the pick-and-place claw 36. A conveyor motor 314 is fixedly installed on the side frame 311, and the conveyor motor 314 is poweredly connected to the conveyor rollers 312. A guide limiting plate 315 is fixedly installed on the side frame 311. The guide limiting plate 315 is located on the conveying path of the conveyor belt 313. The guide limiting plate 315 is symmetrically arranged in two parts on both sides of the conveyor belt 313. The guide limiting plate 315 guides the vertical spring to the pick-and-place claw 36.

[0052] Furthermore, the conveying system is connected to the conveyor belt 313, so that the conveying system delivers the spring to the conveyor belt 313. At the same time, when the conveying system delivers the spring to the conveyor belt 313, the spring is in a vertical state and the axis of the spring is in the vertical direction.

[0053] When the spring is moved to the detection position, the conveyor motor 314 is started, which drives the conveyor roller 312 to rotate. The conveyor roller 312 drives the conveyor belt 313 to rotate, and the conveyor belt 313 moves the vertical spring. The spring is restricted by the guide limit plate 315 and moves towards the pick-and-place claw 36. Since the spring is in a vertical state at this time, the spring will directly insert into the pick-and-place claw 36, that is, the pick-and-place claw 36 will support the spring from the gap. Then, the servo motor 34 is started, which drives the bevel gear 35 to rotate. The bevel gear 35 drives the gear ring 33 to rotate. The gear ring 33 drives the ring frame 32 to rotate on the fixed frame 31. The ring frame 32 drives the pick-and-place claw 36 to rotate, so that the pick-and-place claw 36 adjacent to the pick-and-place claw 36 carrying the spring rotates to the corresponding conveyor belt 313. Then, the spring continues to be moved to the empty pick-and-place claw 36. As the ring frame 32 rotates, The spring-carrying pick-and-place claw 36 rotates onto the first detection rod 23. At this time, the second detection rod 26 presses down, and the top frame 25 drives the insertion rod 38 to move. The insertion rod 38 inserts into the insertion port 39, and the insertion rod 38 opens the pick-and-place claw 36 through the insertion port 39. As the pick-and-place claw 36 opens, the tension spring 37 is stretched, so that the pick-and-place claw 36 releases its support for the spring, and places the spring in the clamp between the first detection rod 23 and the second detection rod 26. After the detection is completed, the top frame 25 returns to its original position, the insertion rod 38 disengages from the insertion port 39, and the tension spring 37 uses its restoring force to return the pick-and-place claw 36 to its original position, so that the pick-and-place claw 36 re-supports the detected spring. Then, as the ring frame 32 rotates, the pick-and-place claw 36 carrying the detected spring hits the blocking member 310. The blocking member 310 removes the detected spring from the pick-and-place claw 36, so that the freed pick-and-place claw 36 continues to turn to the conveyor belt 313.

[0054] Working principle of the invention:

[0055] The vertical spring is conveyed onto the conveyor belt 313, which then conveys it to the pick-and-place claw 36. The pick-and-place claw 36 receives the vertical spring and moves it to the detection position. The second detection rod 26 presses down on the vertical spring. At the same time, after the spring is pressed onto the first detection rod 23, the pick-and-place claw 36 opens. Then, the first detection rod 23 performs an elasticity test on the spring. In this way, the pick-and-place claw 36 stably delivers the spring to the detection position, avoiding inaccurate spring positioning caused by manual assistance, which would reduce the test quality and improve the overall test efficiency.

[0056] When testing the spring, the control display 213 controls the start of the elasticity testing device. When the spring moves vertically to the first detection rod 23, the stepper motor 210 is started. The stepper motor 210 drives the power gear 211 to rotate, the power gear 211 drives the driven gear 212 to rotate, the driven gear 212 drives the pulley 28 to rotate, the pulley 28 drives the toothed belt 29 to rotate, the toothed belt 29 drives all the pulleys 28 to rotate, the pulleys 28 drive the screw 27 to rotate, the screw 27 drives the top frame 25 to move on the support column 21, the top frame 25 drives the second detection rod 26 to move towards the first detection rod 23, so that the spring is vertically pressed on the first detection rod 23, so that the spring is compressed and the spring force of the return presses the first detection rod 23. The first detection rod 23 transmits the force to the pin-type sensor 24 to perform the elasticity test of the spring.

[0057] When the spring is moved to the detection position, the conveyor motor 314 is started. The conveyor motor 314 drives the conveyor roller 312 to rotate, and the conveyor roller 312 drives the conveyor belt 313 to rotate. The conveyor belt 313 moves the vertical spring. The spring is restricted by the guide limit plate 315 and moves towards the pick-and-place claw 36. Since the spring is in a vertical state at this time, the spring will directly insert into the pick-and-place claw 36, that is, the pick-and-place claw 36 will support the spring from the gap. Then the servo motor 34 is started. The servo motor 34 drives the bevel gear 35 to rotate, the bevel gear 35 drives the gear ring 33 to rotate, and the gear ring 33 drives the ring frame 32 to rotate on the fixed frame 31. The ring frame 32 drives the pick-and-place claw 36 to rotate, so that the pick-and-place claw 36 adjacent to the pick-and-place claw 36 carrying the spring rotates to the corresponding conveyor belt 313. Then the spring continues to be moved to the empty pick-and-place claw 36. As the ring frame 32 rotates, the spring carrying the spring moves to the empty pick-and-place claw 36. The spring-loaded pick-and-place claw 36 rotates onto the first detection rod 23. At this time, the second detection rod 26 presses down, and the top frame 25 drives the insertion rod 38 to move. The insertion rod 38 inserts into the insertion port 39, and the insertion rod 38 opens the pick-and-place claw 36 through the insertion port 39. As the pick-and-place claw 36 opens, the tension spring 37 is stretched, so that the pick-and-place claw 36 releases its support for the spring, so that the spring is placed in the clamp between the first detection rod 23 and the second detection rod 26. After the detection is completed, the top frame 25 returns to its original position, the insertion rod 38 disengages from the insertion port 39, and the tension spring 37 uses its restoring force to return the pick-and-place claw 36 to its original position, so that the pick-and-place claw 36 re-supports the spring after detection. Then, as the ring frame 32 rotates, the pick-and-place claw 36 carrying the spring after detection hits the blocking member 310. The blocking member 310 removes the spring after detection from the pick-and-place claw 36, so that the free pick-and-place claw 36 continues to turn to the conveyor belt 313.

[0058] A method for using a pivot pin type sensor, employing the aforementioned elasticity testing device, includes the following steps:

[0059] S1: The vertical spring is conveyed to the conveyor belt 313, and the conveyor belt 313 conveys the vertical spring to the pick-and-place claw 36.

[0060] S2: Pick-up claw 36 catches the vertical spring and moves the vertical spring to the detection position;

[0061] S3: The second detection rod 26 presses down on the vertical spring. At the same time, after the spring is pressed on the first detection rod 23, the pick-and-place claw 36 opens. Then the first detection rod 23 uses the pin-type sensor 24 to perform an elasticity test on the spring.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An elasticity testing device, comprising a base, a testing mechanism disposed on the base, and an auxiliary mechanism disposed on the testing mechanism, characterized in that: The testing mechanism includes a first detection rod, a second detection rod, a top frame, and a support column. The first detection rod is mounted on the base, and the second detection rod is mounted on the base. The second detection rod is located directly above the first detection rod. The second detection rod moves towards the first detection rod and compresses the spring between the first and second detection rods. The first detection rod detects the elasticity of the spring. The auxiliary mechanism includes a pick-and-place claw, a conveyor belt, and a ring frame. The pick-and-place claw rotates, and its movement trajectory covers the top of the first detection rod. The movement trajectory of the pick-and-place claw also covers the conveyor belt. The pick-and-place claw transfers the spring conveyed by the conveyor belt to the first detection rod. When the spring is being tested for elasticity, the pick-and-place claw opens to avoid the detection position of the spring. The second detection rod is fixedly installed at the bottom end of the top frame, and the top frame can drive the second detection rod to move. The ring frame is provided with a plurality of pick-and-place claws, which are evenly distributed on the ring frame. Each pick-and-place claw is arranged symmetrically adjacent to two parts. The front end of the pick-and-place claw is rotatably engaged with the rear end of the pick-and-place claw, and the rear end of the pick-and-place claw is connected to the ring frame. The pick-and-place claw has a scissor-shaped structure. A tension spring is provided between the two parts of the pick-and-place claw. The two ends of the tension spring are respectively connected to the two parts of the pick-and-place claw. The tension spring is located on the front end of the pick-and-place claw. A rod is fixedly installed at the bottom of the top frame. The front ends of the two parts of the pick-and-place claw are provided with insertion ports. The rod corresponds to the insertion port on the pick-and-place claw when it is rotated to the detection position. The size of the rod is adapted to the size of the insertion port. When the rod is inserted into the insertion port, the front end of the pick-and-place claw opens. A blocking member is fixedly installed on the support column. The blocking member is located above the movement trajectory of the pick-and-place claw and blocks the spring after detection.

2. The elasticity testing device according to claim 1, characterized in that: The support column is fixedly installed on the base. The support column is symmetrically arranged in two parts on both sides of the base. The support column is hollow. A base frame is provided between the two support columns. The base frame is located at the lower end of the support column. The two ends of the base frame are fixedly connected to the support column on each side. The first detection rod is slidably fitted at the top of the base frame. The first detection rod passes through the base frame. A pin-type sensor is provided at the bottom of the base frame. The bearing end of the pin-type sensor is fixedly connected to the base frame. The force detection end of the pin-type sensor is fixedly connected to the bottom end of the first detection rod.

3. The elasticity testing device according to claim 2, characterized in that: A top frame is provided between the two pillars. The top frame is located at the upper end of the pillar and directly above the base frame. Both ends of the top frame penetrate the wall of the pillar on each side. The top frame slides with the pillar. The size of the second detection rod is adapted to the size of the first detection rod. The top end of the first detection rod is the detection position of the spring.

4. The elasticity testing device according to claim 3, characterized in that: Each support column is rotatably fitted with a screw. The top end of the screw is connected to the inner top end of the support column, and the bottom end of the screw penetrates the support column and the wall of the base. Each bottom end of the screw is fixedly mounted with a pulley. Toothed belts are tensioned on the pulleys on both sides and mesh with the pulleys. A stepper motor is fixedly mounted inside the base. A drive gear is fixedly mounted on the shaft of the stepper motor, and a driven gear is fixedly mounted on one side of the pulley. The driven gear is larger than the drive gear and meshes with the drive gear.

5. The elasticity testing device according to claim 4, characterized in that: A control display is fixedly installed on the support column, and the control display is used to control the operation of the testing device.

6. The elasticity testing device according to claim 5, characterized in that: The auxiliary mechanism also includes a fixed frame, which is fixedly installed on the support column on one side. The fixed frame is sleeved on the support column and has a circular structure. The fixed frame is located above the first detection rod. A ring frame is sleeved on the fixed frame and slides with the fixed frame. A gear ring is fixedly installed at the bottom end of the ring frame. The size of the gear ring is adapted to the size of the ring frame, and the tooth surface of the gear ring is located at the bottom end. A servo motor is fixedly installed on the support column and is located below the gear ring. A bevel gear is fixedly installed on the shaft of the servo motor and meshes with the gear ring.

7. The elasticity testing device according to claim 6, characterized in that: A side frame is fixedly installed on the support column, and multiple conveyor rollers are rotatably fitted on the side frame. The conveyor belt is tensioned on the conveyor rollers. The end of the conveyor belt's conveying path is adjacent to the moving trajectory of the pick-and-place claw, so that the conveyor belt conveys the vertical spring to the pick-and-place claw. A conveyor motor is fixedly installed on the side frame and is poweredly connected to the conveyor rollers. A guide limiting plate is fixedly installed on the side frame and is located on the conveyor belt's conveying path. The guide limiting plate is symmetrically arranged in two parts on both sides of the conveyor belt, and the guide limiting plate guides the vertical spring to the pick-and-place claw.

8. A method of using a pivot-type sensor, employing the elasticity testing device as described in any one of claims 1-7, characterized in that, Includes the following steps: S1: The vertical spring is conveyed onto the conveyor belt, and the conveyor belt conveys the vertical spring onto the pick-and-place claw; S2: The pick-and-place claw receives the vertical spring and moves the vertical spring to the detection position; S3: The second detection rod presses down on the vertical spring. At the same time, after the spring is pressed on the first detection rod, the pick-and-place claws open, and then the first detection rod uses the pin-type sensor to perform an elasticity test on the spring.

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