Automobile leaf spring testing equipment and testing method

Abstract

The present invention relates to the automotive field, and in particular to an automotive leaf spring testing device and testing method. The present invention provides an automotive leaf spring testing device and testing method that can more quickly and fully detect the compressive performance of a leaf spring. An automotive leaf spring testing device and testing method, comprising a housing, a mounting turntable, a mounting rod, and a testing device, etc.; mounting turntables are rotatably connected to both sides of the interior of the housing, and mounting rods are fixed to both mounting turntables, and the testing device is provided on the housing. The staff adjusts the telescopic shafts of the two hydraulic cylinders to extend and retract alternately, thereby driving the two magnetic extrusion plates to move downward alternately. The downward movement of the magnetic extrusion plates will squeeze the leaf spring, and this is repeated, thereby allowing the two magnetic extrusion plates to alternately squeeze the leaf spring, thereby performing a more intensive compressive test on the leaf spring, so that the compressive strength of the leaf spring can be tested more quickly.

Description

Technical Field

[0001] The present invention relates to the automotive field, and in particular to an automotive leaf spring testing device and a testing method. Background Art

[0002] Leaf spring is the most widely used elastic element in automobile suspension. It is an elastic beam of approximately equal strength composed of several alloy spring leaves of equal width but unequal length. The function of the leaf spring is to connect the frame and the axle in the form of a suspension, to withstand the impact force of the wheel on the frame, and to reduce the severe vibration of the vehicle body, so as to maintain the stability of the vehicle's driving and its adaptability to different road conditions. Therefore, the compression resistance of the leaf spring determines the safety and comfort of the vehicle to a certain extent.

[0003] When factories produce leaf springs, they need to test the compressive strength of the leaf springs, which is also one of the important tests for determining whether the leaf springs are qualified. When conducting the compressive strength test of the leaf springs, the staff first places the leaf springs under the testing machine, and uses the testing machine to squeeze the leaf springs. The degree of deformation of the leaf springs is used to determine the compressive strength of the leaf springs. However, due to the long return time of the extrusion block of the current testing machine, the leaf springs are not squeezed quickly enough. In addition, the current testing machine is difficult to simulate the different impact levels of cars on different road conditions, making it inconvenient to conduct random impact compression tests on the leaf springs. As a result, the compression test of the leaf springs is not sufficient, which will lead to insufficient testing of the compression performance of some leaf springs. Summary of the Invention

[0004] In order to solve the problem that the current leaf spring testing machine cannot detect the compressive performance of the leaf spring quickly and fully, the present invention provides an automobile leaf spring testing device and a testing method that can detect the compressive performance of the leaf spring more quickly and fully.

[0005] The technical solution is: a kind of automobile leaf spring testing equipment and testing method, including a shell, a mounting turntable, a mounting rod, a testing device and an auxiliary device, a square opening is opened on the middle side of the top of the shell, and the mounting turntables are rotatably connected on both sides of the shell. The two mounting turntables are symmetrically arranged, and the two mounting turntables are fixedly connected to the mounting rods. A leaf spring is sleeved between the two mounting rods. The testing device is arranged on the shell, and the auxiliary device is arranged on the shell.

[0006] Furthermore, the testing device includes a hydraulic cylinder, a mounting block, a connecting shaft, a magnetic extrusion plate, a pulley, a locking plate and a strip magnetic block. Two hydraulic cylinders are fixedly connected to the middle side of the top of the shell, the telescopic shafts of the two hydraulic cylinders pass through the shell, and the square opening of the shell is located between the two hydraulic cylinders. The two hydraulic cylinders are symmetrically arranged, and the telescopic shafts of the two hydraulic cylinders are fixedly connected to the mounting blocks. The two mounting blocks are rotatably connected to the connecting shafts, and the two connecting shafts are fixedly connected to the magnetic extrusion plates. The two magnetic extrusion plates are staggered, and the two connecting shafts are rotatably connected to a number of pulleys. The two mounting blocks are slidably connected to the locking plates, and the bottoms of the two locking plates are in contact with a number of pulleys. The two locking plates are respectively located above the two mounting blocks, and the bottoms of the two locking plates are respectively in contact with the tops of the two magnetic extrusion plates. One end of the two locking plates is provided with a strip magnetic block.

[0007] Furthermore, the auxiliary device includes a large T-shaped block, a first magnet, a small T-shaped block, a large mounting plate, a small mounting plate, a fixed shaft, a slide block, a second magnet and a third magnet, the large T-shaped block and the small T-shaped block are fixedly connected to the top inner side of the shell, the telescopic shafts of the two hydraulic cylinders are located between the large T-shaped block and the small T-shaped block, the bottoms of the large T-shaped block and the small T-shaped block are fixedly connected to the first magnet, the two locking plates are located at the same horizontal line as the two first magnets, and the two locking plates and the magnetic properties of the two first magnets repel each other, the large mounting plate and the small mounting plate are fixedly connected to the bottom inner side of the shell, the large mounting plate and the small mounting plate are fixedly connected to the fixed shaft, the two fixed shafts are symmetrically arranged, the middle parts of the two fixed shafts are fixedly connected to the slide block, the two slide blocks are slidably connected to the second magnet, the two second magnets are attracted to the magnetic properties of the two strip-shaped magnetic blocks, the two mounting blocks are fixedly connected to two third magnets, and the four third magnets are attracted to the magnetic properties of the two magnetic extrusion plates.

[0008] The two gears are connected with each other by a plurality of springs, and the two gears are connected with each other by a plurality of springs.

[0009] Furthermore, it also includes a locking device, which is arranged on the random displacement device, and the locking device includes an extrusion rod, a first cylinder, a first piston rod, a second cylinder, an air guide pipe, a second piston rod and an extrusion plate, wherein the driving rod is fixedly connected to the extrusion rods on both sides, and the bottom of the inner side of the shell is fixedly connected to the two first cylinders, and the large mounting plate and the small mounting plate are both located between the two first cylinders, the two first cylinders are slidably connected to the first piston rods, the two extrusion rods are respectively fixedly connected to the top ends of the two first piston rods, the tops of the two slide blocks are fixedly connected to the second cylinders, the lower parts of the two first cylinders are connected to the air guide pipes, the other ends of the two air guide pipes are respectively fixedly connected to the two second cylinders, and the two air guide pipes are respectively connected to the two second cylinders, the second piston rods are slidably connected in the two second cylinders, and one end of the two second piston rods located outside the second cylinder is fixedly connected to the extrusion plate, the two extrusion plates are respectively in contact with the two second magnets, and a pressure relief hole is opened on the top of the two second cylinders.

[0010] Furthermore, a fixing nut is included, and one end of the two mounting rods is connected to the fixing nut through a thread.

[0011] Furthermore, it also includes transparent protective doors. Two transparent protective doors are slidably connected to the shell, and the two transparent protective doors are symmetrically arranged.

[0012] Furthermore, it also includes a handle, and the outer sides of the two transparent protective doors are fixedly connected with a handle, and the two handles are symmetrically arranged.

[0013] Furthermore, the following working steps are included:

[0014] Step 1: The staff pushes the two transparent protective doors to open the housing, then rotates the two fixing nuts to disengage the fixing nuts from the mounting rods, puts the leaf springs on the two mounting rods, and then reverses the fixing nuts back onto the mounting rods to limit the leaf springs. Then, the staff closes the two transparent protective doors.

[0015] Step 2: Then start the two hydraulic cylinders and let the telescopic shafts of the two hydraulic cylinders extend and retract alternately, so that the two magnetic extrusion plates alternately squeeze the leaf spring to perform a rapid compression test on the leaf spring;

[0016] Step 3: When the leaf spring is squeezed, it pushes the drive rod downward. When the drive rod returns upward, it drives the ratchet to rotate, which in turn drives the second magnet to move up or down. By adjusting the height of the second magnet, the degree to which the magnetic extrusion plate squeezes the leaf spring is adjusted, and the leaf spring is subjected to random compression tests.

[0017] Step 4: When the driving rod moves downward, it drives the extrusion rod downward, which in turn squeezes the gas in the first cylinder to flow to the second cylinder, pushing the second piston rod and the extrusion plate, locking the second magnet so that it will not move freely;

[0018] Step 5: After the compression test of the leaf spring is completed, the staff closes the two hydraulic cylinders, opens the two transparent protective doors, and then rotates the two fixing nuts to disengage the fixing nuts from the mounting rods. The leaf spring is removed from the housing, and then the fixing nuts are reversed back onto the mounting rods and the transparent protective doors are closed.

[0019] The beneficial effects are:

[0020] 1. The staff adjusts the telescopic shafts of the two hydraulic cylinders to extend and retract alternately, thereby driving the two magnetic extrusion plates to move downward alternately. The downward movement of the magnetic extrusion plates will squeeze the leaf spring. This is repeated, and the two magnetic extrusion plates will alternately squeeze the leaf spring, thereby performing a more intensive compression test on the leaf spring, so that the compression resistance of the leaf spring can be tested more quickly; when the staff wants to reduce the frequency of the test, they only need to start a hydraulic cylinder, and then let a magnetic extrusion plate squeeze the leaf spring, so as to reduce the frequency of the compression test and test the compression resistance of the leaf spring.

[0021] 2. When the leaf spring is squeezed, it will push the drive rod to move downward, thereby driving the random disk to rotate. Due to the irregular shape of the slide groove on the random disk, the rotation of the random disk will drive the slide rod to move up or down, thereby driving the second magnet to move up or down. By adjusting the height of the second magnet, the force of the magnetic extrusion plate squeezing the leaf spring can be adjusted. This can simulate the different impact forces of different roads on car tires, thereby testing the compressive resistance of the leaf spring in the face of different impact forces; at the same time, the degree to which the leaf spring is squeezed is different, and the distance that the drive rod is reset upward will also be different, which makes the degree of rotation of the random disk different, and then the distance moved by the second magnet will also be different. In this way, the degree to which the magnetic extrusion plate squeezes the leaf spring is random, and then a random compression test is performed on the leaf spring, thereby performing a more sufficient compression test on the leaf spring.

[0022] 3. The downward movement of the driving rod will drive the extrusion rod to move downward, and then push the gas in the second cylinder to squeeze the second piston rod, so that the extrusion plate and the second magnet fit tightly, thereby increasing the friction between the extrusion plate and the second magnet, and limiting the second magnet so that the second magnet will not move at will after the height is adjusted, so that the second magnet can firmly adsorb the two magnetic extrusion plates, so that the leaf spring can rebound smoothly.

[0023] 4. The two fixing nuts will limit the leaf spring so that the leaf spring will not detach from the two mounting rods when being squeezed, so that the two magnetic squeezing plates can fully squeeze the leaf spring; the transparent protective door can prevent steel fragments from splashing out when the leaf spring is squeezed and accidentally injuring staff. At the same time, since the transparent protective door is transparent, it is also convenient for staff to observe the degree of deformation of the leaf spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the first partial three-dimensional structure of the present invention.

[0026] Figure 3 It is a schematic diagram of a second partial three-dimensional structure of the present invention.

[0027] Figure 4 It is a partial cross-sectional three-dimensional structural schematic diagram of the testing device and auxiliary device of the present invention.

[0028] Figure 5 It is a schematic diagram of the partially cutaway three-dimensional structure of the testing device of the present invention.

[0029] Figure 6 It is a schematic diagram of the partial three-dimensional structure of the testing device and auxiliary device of the present invention.

[0030] Figure 7 It is a schematic diagram of the three-dimensional structure of the magnetic extrusion plate of the present invention.

[0031] Figure 8 It is a partial cross-sectional three-dimensional structural schematic diagram of the auxiliary device and random displacement device of the present invention.

[0032] Figure 9 Schematic diagram of the three-dimensional structure of the second magnet, random disk and sliding rod of the present invention.

[0033] Figure 10 It is a schematic diagram of the cross-sectional three-dimensional structure of the ratchet assembly of the present invention.

[0034] Figure 11 It is a partial cross-sectional three-dimensional structural schematic diagram of the locking device of the present invention.

[0035] Figure 12 For the present invention Figure 11 Schematic diagram of the enlarged three-dimensional structure of A in the middle.

[0036] Figure 13 It is a partial cross-sectional three-dimensional structural schematic diagram of the locking device of the present invention.

[0037] Figure 14 It is a schematic diagram of a third partial three-dimensional structure of the present invention.

[0038] Figure 15 Schematic diagram of the workflow of the present invention.

[0039] Figure numbers: 1_housing, 2_mounting turntable, 3_mounting rod, 1001_steel leaf spring, 41_hydraulic cylinder, 42_mounting block, 43_connecting shaft, 44_magnetic extrusion plate, 45_pulley, 46_locking plate, 461_strip magnetic block, 511_large T-shaped block, 512_first magnet, 513_small T-shaped block, 521_large mounting plate, 522_small mounting plate, 53_fixed shaft, 54_slide block, 55 _Second magnet, 56_Third magnet, 61_Mounting box, 62_Drive rod, 63_Reset spring, 64_Ratchet assembly, 65_Ratchet, 66_Random disk, 67_Sliding rod, 71_Squeezing rod, 72_First cylinder, 73_First piston rod, 74_Second cylinder, 75_Air guide tube, 76_Second piston rod, 77_Squeezing disk, 78_Pressure relief hole, 8_Fixing nut, 9_Transparent protective door, 10_Handle. DETAILED DESCRIPTION

[0040] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional means such as bolts, rivets, welding, and bonding in the existing technology, which will not be described in detail here.

[0041] Example 1

[0042] A vehicle leaf spring testing device and testing method, such as Figures 1-15 As shown, it includes a shell 1, a mounting turntable 2, a mounting rod 3, a testing device and an auxiliary device. A square opening is opened in the middle of the top of the shell 1. The mounting turntables 2 are rotatably connected on both sides of the shell 1. The two mounting turntables 2 are symmetrically arranged. The two mounting turntables 2 are welded with mounting rods 3. The two mounting rods 3 are horizontally arranged. The mounting rods 3 are used to place the leaf spring 1001. A leaf spring 1001 is sleeved between the two mounting rods 3. The testing device is provided on the shell 1. The testing device is used to perform a pressure test on the leaf spring 1001. The auxiliary device is provided on the shell 1. The auxiliary device is used to assist the testing device in testing the leaf spring 1001.

[0043] The testing device includes a hydraulic cylinder 41, a mounting block 42, a connecting shaft 43, a magnetic extrusion plate 44, a pulley 45, a locking plate 46 and a strip magnetic block 461. The top middle side 6 of the shell 1 is connected to two hydraulic cylinders 41 by bolts. The telescopic shafts of the two hydraulic cylinders 41 pass through the shell 1. The square opening of the shell 1 is located between the two hydraulic cylinders 41. The two hydraulic cylinders 41 are symmetrically arranged. The telescopic shafts of the two hydraulic cylinders 41 are provided with mounting blocks 42. The two mounting blocks 42 are rotatably connected to the connecting shafts 43. The two connecting shafts 43 are horizontally arranged. The two connecting shafts 43 are hinged to the magnetic extrusion plates 461. 4. The two magnetic extrusion plates 44 are staggered and are used to extrude the leaf spring 1001. A plurality of pulleys 45 are rotatably connected to the two connecting shafts 43. A locking plate 46 is slidably connected to the two mounting blocks 42. The bottoms of the two locking plates 46 are in contact with the plurality of pulleys 45. The pulleys 45 are used to reduce the friction between the locking plates 46 and the magnetic extrusion plates 44. The two locking plates 46 are respectively located above the two mounting blocks 42. The bottoms of the two locking plates 46 are in contact with the tops of the two magnetic extrusion plates 44. A strip magnetic block 461 is provided at one end of the two locking plates 46.

[0044] The auxiliary device includes a large T-shaped block 511, a first magnet 512, a small T-shaped block 513, a large mounting plate 521, a small mounting plate 522, a fixed shaft 53, a slide block 54, a second magnet 55 and a third magnet 56. The large T-shaped block 511 and the small T-shaped block 513 are welded to the top of the inner side of the shell 1. The telescopic shafts of the two hydraulic cylinders 41 are both located between the large T-shaped block 511 and the small T-shaped block 513. The bottoms of the large T-shaped block 511 and the small T-shaped block 513 are both connected to the first magnet 512 by bolts. The two locking plates 46 are both located on the same horizontal line as the two first magnets 512. The two locking plates 46 are both magnetically aligned with the two first magnets 512. The two fixing plates 53 are symmetrically arranged and horizontally arranged. A slide block 54 is welded to the middle of the two fixing plates 53. The two slide blocks 54 are slidably connected to the second magnet 55. The two second magnets 55 are attracted to the magnetism of the two strip magnetic blocks 461. Two third magnets 56 are connected to the two mounting blocks 42 by bolts. The four third magnets 56 are attracted to the magnetism of the two magnetic extrusion plates 44.

[0045] In actual operation, the staff put the two ends of the leaf spring 1001 to be tested on the two mounting rods 3. The two mounting rods 3 are used to support the leaf spring 1001. The leaf spring 1001 is located under the two magnetic extrusion plates 44. Then the hydraulic cylinder 41 near the side of the large T-shaped block 511 is started first. The telescopic shaft of the hydraulic cylinder 41 near the side of the large T-shaped block 511 is quickly extended, which will drive the mounting block 42 near the side of the large T-shaped block 511 to move downward quickly. The downward movement of the mounting block 42 near the side of the large T-shaped block 511 will drive the connecting shaft 43, the magnetic extrusion plate 44, the locking plate 46, the strip magnetic block 461 and the two third magnets 56 near the side of the large T-shaped block 511 to move downward. The downward movement of the connecting shaft 43 will drive the six pulleys 45 near the side of the large T-shaped block 511 to move downward, and the magnetic extrusion plate 44 near the side of the large T-shaped block 511 will move downward quickly to contact the top of the leaf spring 1001 and squeeze the leaf spring 1001. The extrusion of the leaf spring 1001 will push the two mounting rods 3 to move away from each other, and the movement of the two mounting rods 3 in the direction of moving away from each other will drive the two mounting turntables 2 to rotate. Due to the mutual attraction between the strip magnetic block 461 and the second magnet 55, when the strip magnetic block 461 near the side of the large T-shaped block 511 moves downward to the second magnet 55 near the side of the small mounting plate 522, the strip magnetic block 461 near the side of the large T-shaped block 511 will be attracted by the second magnet 55 near the side of the small mounting plate 522. The second magnet 55 on the side of the mounting plate 522 is attracted, and the strip magnetic block 461 on the side close to the large T-shaped block 511 will move in the direction away from the large mounting plate 521 and contact the second magnet 55 on the side close to the small mounting plate 522. The movement of the strip magnetic block 461 on the side close to the large T-shaped block 511 will drive the locking plate 46 on the side close to the large T-shaped block 511 to move, and the movement of the locking plate 46 on the side close to the large T-shaped block 511 will be out of contact with the magnetic extrusion plate 44 on the side close to the large T-shaped block 511. Since the steel leaf spring 1001 has a strong elastic force, the steel leaf spring 1001 will press against the magnetic extrusion plate 44, and the magnetic extrusion plate 44 will press against the locking plate 46, resulting in a large resistance when the locking plate 46 moves, and the pulley 45 When the locking plate 46 moves, the sliding friction between the locking plate 46 and the mounting block 42 is converted into rolling friction between the locking plate 46 and the pulley 45, thereby greatly reducing the resistance between the locking plate 46 and the magnetic extrusion plate 44, so that the locking plate 46 close to the side of the large T-shaped block 511 can move smoothly and disengage from the magnetic extrusion plate 44. Under the elastic force of the steel plate spring 1001, the steel plate spring 1001 pushes the magnetic extrusion plate 44 close to the side of the large T-shaped block 511 to swing upward. The upward swing of the magnetic extrusion plate 44 close to the side of the large T-shaped block 511 will drive the connecting shaft 43 and the six pulleys 45 close to the side of the large T-shaped block 511 to rotate. Due to the mutual attraction between the magnetic extrusion plate 44 and the third magnet 56,As the magnetic extrusion plate 44 near the large T-shaped block 511 swings upward, it is attracted by the two third magnets 56 near the large T-shaped block 511. This prevents the magnetic extrusion plate 44 from swinging downward under the action of gravity. As the leaf spring 1001 resets, it drives the two mounting rods 3 toward each other. The movement of the two mounting rods 3 toward each other drives the two mounting turntables 2 to rotate in opposite directions.

[0046] Then the staff starts the hydraulic cylinder 41 near the side of the small T-shaped block 513, and at the same time adjusts the telescopic shaft of the hydraulic cylinder 41 near the side of the large T-shaped block 511 to quickly retract. The rapid retraction of the telescopic shaft of the hydraulic cylinder 41 near the side of the large T-shaped block 511 will drive the mounting block 42 near the side of the large T-shaped block 511 to quickly reset upwards. The upward reset of the mounting block 42 near the side of the large T-shaped block 511 will drive the connecting shaft 43, the magnetic extrusion plate 44, the locking plate 46, the strip magnetic block 461 and the two third magnets 56 near the side of the large T-shaped block 511 to reset upwards. The upward reset of the strip magnetic block 461 near the side of the large T-shaped block 511 will disengage from the second magnet 55. The upward reset of the connecting shaft 43 near the side of the large T-shaped block 511 will drive the six pulleys 45 near the side of the large T-shaped block 511 When the lock plate 46 is in the state of rotation and the locking plate 46 is in the state of rotation, the locking plate 46 will be in the state of rotation and the locking plate 46 will be in the state of rotation.At the same time, the telescopic shaft of the hydraulic cylinder 41 near the small T-shaped block 513 is quickly extended, which drives the mounting block 42 near the small T-shaped block 513 to move downward quickly. The downward movement of the mounting block 42 near the small T-shaped block 513 drives the connecting shaft 43, the magnetic extrusion plate 44, the locking plate 46 and the strip magnetic block 461 near the small T-shaped block 513 to move downward. Since the magnetic extrusion plate 44 near the large T-shaped block 511 is in the process of resetting upward, the magnetic extrusion plate 44 near the small T-shaped block 513 is also in the process of resetting upward. The pressing plate 44 is already moving downward, so the magnetic extrusion plate 44 near the large T-shaped block 511 side does not hinder the magnetic extrusion plate 44 near the small T-shaped block 513 from moving downward. The magnetic extrusion plate 44 near the small T-shaped block 513 moves downward quickly and contacts the top of the leaf spring 1001 and squeezes the leaf spring 1001. When the strip magnetic block 461 near the small T-shaped block 513 side moves downward onto the second magnet 55 near the large mounting plate 521 side, the magnetic extrusion plate 44 near the small T-shaped block 513 moves downward quickly and contacts the top of the leaf spring 1001 and squeezes the leaf spring 1001. The strip magnet 461 on the side of the large mounting plate 521 will be attracted by the second magnet 55 on the side of the large mounting plate 521, and the locking plate 46 on the side of the small T-shaped block 513 will move away from the small mounting plate 522 and contact the second magnet 55 on the side of the large mounting plate 521. The movement of the strip magnet 461 on the side of the small T-shaped block 513 will drive the locking plate 46 on the side of the small T-shaped block 513 to move, and the movement of the locking plate 46 on the side of the small T-shaped block 513 will contact the locking plate 46 on the side of the small T-shaped block 513. The magnetic extrusion plate 44 disengages from the small T-shaped block 513. Under the elastic force of the leaf spring 1001, the leaf spring 1001 pushes the magnetic extrusion plate 44 near the small T-shaped block 513 to swing upward. This upward swinging of the magnetic extrusion plate 44 near the small T-shaped block 513 drives the connecting shaft 43 and the six pulleys 45 near the small T-shaped block 513 to rotate. As the magnetic extrusion plate 44 near the large T-shaped block 511 swings upward, it is attracted by the two third magnets 56 near the large T-shaped block 511.

[0047] Then the staff adjusts the telescopic shaft of the hydraulic cylinder 41 near the small T-shaped block 513 to quickly retract, and at the same time adjusts the telescopic shaft of the hydraulic cylinder 41 near the large T-shaped block 511 to quickly extend, and repeats this process, so that the two magnetic extrusion plates 44 alternately squeeze the leaf spring 1001, thereby performing a more intensive compression test on the leaf spring 1001, so that the compression resistance of the leaf spring 1001 can be tested more quickly. The rapid contraction of the telescopic shaft of the hydraulic cylinder 41 near the small T-shaped block 513 will drive the mounting block 42 near the small T-shaped block 513 to quickly reset upwards. The upward reset of the mounting block 42 near the small T-shaped block 513 will drive the connecting shaft 43, magnetic extrusion plate 44, locking plate 46, strip magnetic block 461 and two third magnets 56 near the small T-shaped block 513 to reset upwards. The upward reset will drive the six pulleys 45 near the side of the small T-shaped block 513 to reset upward, and the magnetic force of the first magnet 512 will push the strip magnetic block 461 and the locking plate 46 near the side of the small T-shaped block 513 to move away from the large T-shaped block 511. The movement of the locking plate 46 near the side of the small T-shaped block 513 will contact the magnetic extrusion plate 44 near the side of the small T-shaped block 513, and push the magnetic extrusion plate 44 near the side of the small T-shaped block 513 to swing downward. The downward swing of the magnetic extrusion plate 44 near the side of the small T-shaped block 513 will disengage from the two third magnets 56 near the side of the small T-shaped block 513. When the staff wants to reduce the frequency of the test, they only need to start a hydraulic cylinder 41 to allow a magnetic extrusion plate 44 to compress the leaf spring 1001, thereby reducing the frequency of the compression test and testing the compression resistance of the leaf spring 1001.

[0048] Example 2

[0049] On the basis of Example 1, Figures 8-10As shown, a random displacement device is also included, which is provided on the auxiliary device. The random displacement device is used to move the height of the second magnet 55, so as to adjust the different degrees of compression of the steel leaf spring 1001 by the magnetic extrusion plate 44. The random displacement device includes a mounting box 61, a drive rod 62, a return spring 63, a ratchet assembly 64, a ratchet 65, a random disk 66 and a slide rod 67. The large mounting plate 521 and the small mounting plate 522 are both connected to the mounting box 61 by bolts. The two mounting boxes 61 are symmetrically arranged. A drive rod 62 is slidably connected between the two mounting boxes 61. The drive rod 62 is located directly below the steel leaf spring 1001. Three return springs 63 are connected between the drive rod 62 and the two mounting boxes 61 by hooks. The six return springs 63 are respectively located in the two mounting boxes 6 1, the driving rod 62 is hinged with a ratchet assembly 64 at both ends, and the ratchet assembly 64 is provided with three springs and a ratchet. The two fixed shafts 53 are rotatably connected to the ends of the large mounting plate 521. The two ratchet assemblies 64 are engaged with the two ratchets 65. The two fixed shafts 53 are rotatably connected to the random disks 66 on the side away from the large mounting plate 521. The two ratchets 65 are respectively fixedly connected to the two random disks 66. The two ratchets 65 are respectively located on the side of the two random disks 66 away from the small mounting plate 522. The two random disks 66 are provided with slide grooves, and the slide grooves on the two random disks 66 are irregular circles. Slide rods 67 are welded to the lower parts of the two second magnets 55. The two slide rods 67 are horizontally arranged, and the two slide rods 67 are slidably connected to the slide grooves of the random disks 66.

[0050] When the two ratchet assemblies 64 move downward, the two ratchet wheels 65 will continuously toggle the ratchets on the two ratchet assemblies 64. At this time, the two ratchet wheels 65 will not rotate. When the leaf spring 1001 is reset, it no longer squeezes the driving rod 62. The three reset springs 63 on both sides reset and drive the driving rod 62 to reset upward. The upward reset of the driving rod 62 will drive the two ratchet assemblies 64 to reset upward. The upward reset of the two ratchet assemblies 64 will drive the two ratchet wheels 65 to rotate. The rotation of the two ratchet wheels 65 will drive the two random disks 66 to rotate. Due to the irregular shape of the sliding grooves on the two random disks 66, the rotation of the two random disks 66 will drive the two slide bars 67 to move upward or downward. The upward or downward movement of the two slide bars 67 will drive the two second magnets 55 When moving up or down, the magnetic extrusion plate 44 stops squeezing the steel leaf spring 1001 when the magnetic extrusion plate 44 moves downward to the same horizontal line as the second magnet 55. Therefore, the height of the two second magnets 55 is adjusted by moving the two sliding bars 67 upward or downward, and then the force with which the magnetic extrusion plate 44 squeezes the steel leaf spring 1001 is adjusted. This can simulate the different impact forces of different roads on the car tires, so as to test the compression resistance of the steel leaf spring 1001 facing different impact forces. At the same time, the degree to which the steel leaf spring 1001 is squeezed is different, and the distance that the driving rod 62 moves downward and resets upward will also be different, which makes the degrees of rotation of the two ratchet wheels 65 and the two random disks 66 different, and then the distance that the two second magnets 55 move upward or downward will also be different. In this way, the degree to which the magnetic extrusion plate 44 squeezes the steel leaf spring 1001 is random, and then a random compression test is performed on the steel leaf spring 1001, thereby performing a more sufficient compression test on the steel leaf spring 1001.

[0051] Example 3

[0052] On the basis of Example 2, Figure 11-13As shown, a locking device is also included, which is arranged on the random displacement device. The locking device is used to limit the second magnet 55 so that the two second magnets 55 will not move at will after the height is adjusted, thereby allowing the two second magnets 55 to firmly adsorb the two magnetic extrusion plates 44, so that the steel leaf spring 1001 can rebound smoothly. The locking device includes an extrusion rod 71, a first cylinder 72, a first piston rod 73, a second cylinder 74, an air guide tube 75, a second piston rod 76 and an extrusion disk 77. Extrusion rods 71 ​​are welded on both sides of the driving rod 62, and the two extrusion rods 71 ​​are symmetrically arranged. The two extrusion rods 71 ​​are horizontally arranged. The bottom inner side of the shell 1 is connected to the two first cylinders 72 by bolts. The two first cylinders 72 are vertically arranged. The large mounting plate 521 and the small mounting plate 522 are both located between the two first cylinders 72. The two first cylinders 72 are inside Both are slidably connected with a first piston rod 73, and the two extrusion rods 71 ​​are fixedly connected to the top ends of the two first piston rods 73 respectively, and the tops of the two slide blocks 54 are connected to the second cylinders 74 by bolts. The two second cylinders 74 are arranged horizontally, and the lower parts of the two first cylinders 72 are connected with an air guide pipe 75, and the other ends of the two air guide pipes 75 are fixedly connected to the two second cylinders 74 respectively, and the two air guide pipes 75 are connected to the two second cylinders 74 respectively, and the two air guide pipes 75 are arranged vertically. The second cylinders 74 are slidably connected with a second piston rod 76, and the ends of the two second piston rods 76 located outside the second cylinder 74 are welded with an extrusion plate 77, and the two extrusion plates 77 are in contact with the two second magnets 55 respectively. The extrusion plate 77 is used to limit the second magnet 55, and a pressure relief hole 78 is opened on the top of the two second cylinders 74.

[0053] When the driving rod 62 moves downward, it will drive the two squeezing rods 71 ​​to move downward. The downward movement of the two squeezing rods 71 ​​will drive the two first piston rods 73 to move downward. The downward movement of the two first piston rods 73 will push the gas in the two first cylinders 72. Under the action of pressure, the gas in the two first cylinders 72 will flow into the two second cylinders 74 through the two air guide pipes 75. Since the diameter of the two pressure relief holes 78 is much smaller than that of the two air guide pipes 75, most of the gas in the two second cylinders 74 will squeeze the two second piston rods 76, so that the two squeezing plates 77 are tightly fitted with the two second magnets 55, thereby increasing the pressure between the two squeezing plates 77 and the two second magnets 55. The friction between them limits the two second magnets 55, so that the two second magnets 55 will not move at will after the height is adjusted, and then the two second magnets 55 can firmly adsorb the two magnetic extrusion plates 44, so that the steel plate spring 1001 can rebound smoothly; when the driving rod 62 is reset upward, it will also drive the two extrusion rods 71 ​​to reset upward, and the two extrusion rods 71 ​​will drive the two first piston rods 73 to reset upward, and the two first piston rods 73 will be reset upward to draw air from the two pressure relief holes 78 into the two first cylinders 72. Under the action of pressure, the two extrusion plates 77 no longer squeeze the two second magnets 55, and now the two second magnets 55 can adjust their height.

[0054] Example 4

[0055] On the basis of Example 3, Figure 14 As shown, a fixing nut 8 is also included. One end of the two mounting rods 3 is connected to the fixing nut 8 through a thread. The fixing nut 8 is used to limit the leaf spring 1001.

[0056] At first, the staff rotates the two fixing nuts 8 so that the two fixing nuts 8 are out of contact with the two mounting rods 3, then puts the leaf spring 1001 on the two mounting rods 3, and then reinstalls the two fixing nuts 8 on the two mounting rods 3. The two fixing nuts 8 will limit the leaf spring 1001 so that the leaf spring 1001 will not be separated from the two mounting rods 3 when being squeezed, so that the two magnetic squeezing plates 44 can fully squeeze the leaf spring 1001; when the compression test of the leaf spring 1001 is completed, the staff rotates the two fixing nuts 8 again so that the two fixing nuts 8 are out of contact with the two mounting rods 3, then removes the leaf spring 1001 from the two mounting rods 3, and then reinstalls the two fixing nuts 8 on the two mounting rods 3.

[0057] Example 5

[0058] On the basis of Example 4, Figure 14As shown, a transparent protective door 9 is also included. Two transparent protective doors 9 are slidingly connected to the shell 1. The two transparent protective doors 9 are symmetrically arranged. The transparent protective door 9 is used to prevent steel fragments from splashing out when the leaf spring 1001 is squeezed, thereby accidentally injuring staff. At the same time, since the transparent protective door 9 is transparent, it is also convenient for staff to observe the degree of deformation of the leaf spring 1001.

[0059] A handle 10 is also included. The outer sides of the two transparent protective doors 9 are fixedly connected with the handle 10, and the two handles 10 are symmetrically arranged.

[0060] At first, the staff pushed the two transparent protective doors 9 away from each other, opened the inside of the shell 1, and then put the leaf spring 1001 on the two mounting rods 3. Then, the two transparent protective doors 9 were pushed toward each other and the shell 1 was closed to prevent steel fragments from splashing out when the leaf spring 1001 was squeezed, thereby accidentally injuring the staff. At the same time, since the transparent protective doors 9 are transparent, it is also convenient for the staff to observe the degree of deformation of the leaf spring 1001. When the compression test of the leaf spring 1001 is completed, the staff opened the two transparent protective doors 9 again, took out the leaf spring 1001, and then closed the two transparent protective doors 9.

[0061] The two handles 10 on the two transparent protective doors 9 make it convenient for staff to move the transparent protective doors 9.

[0062] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An automobile leaf spring testing device, comprising a housing (1), a mounting turntable (2) and a mounting rod (3), wherein a square opening is opened in the middle of the top of the housing (1), and mounting turntables (2) are rotatably connected to both sides of the interior of the housing (1), the two mounting turntables (2) are symmetrically arranged, and mounting rods (3) are fixedly connected to the two mounting turntables (2), and a leaf spring (1001) is sleeved between the two mounting rods (3), characterized in that: It also includes a testing device and an auxiliary device, wherein the testing device is arranged on the housing (1), and the auxiliary device is arranged on the housing (1); The testing device comprises a hydraulic cylinder (41), a mounting block (42), a connecting shaft (43), a magnetic extrusion plate (44), a pulley (45), a locking plate (46) and a strip-shaped magnetic block (461). Two hydraulic cylinders (41) are fixedly connected to the middle side of the top of the housing (1). The telescopic shafts of the two hydraulic cylinders (41) pass through the housing (1). The square opening of the housing (1) is located between the two hydraulic cylinders (41). The two hydraulic cylinders (41) are symmetrically arranged. The telescopic shafts of the two hydraulic cylinders (41) are fixedly connected to the mounting blocks (42). The two mounting blocks (42) are rotatably connected to the connecting shaft. (43), the two connecting shafts (43) are fixedly connected to a magnetic extrusion plate (44), the two magnetic extrusion plates (44) are staggered, the two connecting shafts (43) are rotatably connected to a plurality of pulleys (45), the two mounting blocks (42) are slidably connected to a locking plate (46), the bottoms of the two locking plates (46) are in contact with the plurality of pulleys (45), the locking plates (46) are located above the mounting blocks (42), the bottoms of the locking plates (46) are in contact with the tops of the magnetic extrusion plates (44), and one ends of the two locking plates (46) are fixedly connected to a strip-shaped magnetic block (461); The auxiliary device comprises a large T-shaped block (511), a first magnet (512), a small T-shaped block (513), a large mounting plate (521), a small mounting plate (522), a fixed shaft (53), a slide block (54), a second magnet (55) and a third magnet (56). The large T-shaped block (511) and the small T-shaped block (513) are fixedly connected to the top of the inner side of the housing (1). The telescopic shafts of the two hydraulic cylinders (41) are both located between the large T-shaped block (511) and the small T-shaped block (513). The bottoms of the large T-shaped block (511) and the small T-shaped block (513) are both fixedly connected to the first magnet (512). The two locking plates (46) are both located on the same horizontal line as the two first magnets (512). The strip-shaped magnetic block (46) is fixedly connected to the bottom of the housing (1). 1) The magnetism of the first magnet (512) repel each other, the inner bottom of the shell (1) is fixedly connected to a large mounting plate (521) and a small mounting plate (522), the large mounting plate (521) and the small mounting plate (522) are fixedly connected to a fixed shaft (53), the two fixed shafts (53) are symmetrically arranged, the middle parts of the two fixed shafts (53) are fixedly connected to a slide block (54), the two slide blocks (54) are slidably connected to a second magnet (55), the second magnet (55) and the strip magnetic block (461) are magnetically attracted to each other, the two mounting blocks (42) are fixedly connected to two third magnets (56), the third magnet (56) and the magnetic extrusion plate (44) are magnetically attracted to each other.

2. The automobile leaf spring testing equipment according to claim 1, characterized in that: The auxiliary device further comprises a random displacement device, which is arranged on the auxiliary device. The random displacement device comprises a mounting box (61), a driving rod (62), a return spring (63), a ratchet assembly (64), a ratchet wheel (65), a random disk (66) and a slide bar (67). The large mounting plate (521) and the small mounting plate (522) are both fixedly connected with the mounting box (61). The two mounting boxes (61) are symmetrically arranged. A driving rod (62) is slidably connected between the two mounting boxes (61). Three return springs (63) are respectively connected between the driving rod (62) and the two mounting boxes (61). The two ends of the driving rod (62) are fixedly connected with the ratchet assembly (64). The ratchet assembly (64) A plurality of elastic members and a ratchet are provided on the drive rod (62), and both ends of the drive rod (62) are fixedly connected to three elastic members, and one end of the three elastic members is fixedly connected to a ratchet, and the ends of the two fixed shafts (53) away from the large mounting plate (521) are rotatably connected to the ratchet (65), and the ratchet in the ratchet assembly (64) is engaged with the ratchet (65), and the sides of the two fixed shafts (53) away from the large mounting plate (521) are rotatably connected to the random disk (66), and the ratchet (65) is fixedly connected to the random disk (66), and a sliding groove is opened on the two random disks (66), and the lower parts of the two second magnets (55) are fixedly connected to a sliding rod (67), and the sliding rod (67) is slidably connected to the sliding groove of the random disk (66).

3. The automobile leaf spring testing equipment according to claim 2, characterized in that: The invention also includes a locking device, which is arranged on the random displacement device. The locking device includes an extrusion rod (71), a first cylinder (72), a first piston rod (73), a second cylinder (74), an air guide tube (75), a second piston rod (76) and an extrusion plate (77). The extrusion rods (71) are fixedly connected to both sides of the driving rod (62). The bottom of the inner side of the housing (1) is fixedly connected to two first cylinders (72). The large mounting plate (521) and the small mounting plate (522) are both located between the two first cylinders (72). The first piston rods (73) are slidably connected to the two first cylinders (72). The extrusion rods (71) and the first piston rods (73) are fixedly connected to the first cylinders (74). 3) The top is fixedly connected, the tops of the two slide blocks (54) are fixedly connected to the second cylinder (74), the lower parts of the two first cylinders (72) are connected to the air guide pipe (75), the other end of the air guide pipe (75) is fixedly connected to the second cylinder (74), and the air guide pipe (75) is connected to the second cylinder (74), the two second cylinders (74) are slidably connected to the second piston rod (76), the ends of the two second piston rods (76) outside the second cylinder (74) are fixedly connected to the extrusion disk (77), the extrusion disk (77) is in contact with the second magnet (55), and the tops of the two second cylinders (74) are each provided with a pressure relief hole (78).

4. The automobile leaf spring testing equipment according to claim 3, characterized in that: It also includes a fixing nut (8), and one end of the two mounting rods (3) is connected to the fixing nut (8) through a thread.

5. The automobile leaf spring testing equipment according to claim 4, characterized in that: It also includes transparent protective doors (9), two transparent protective doors (9) are slidably connected to the housing (1), and the two transparent protective doors (9) are symmetrically arranged.

6. The automobile leaf spring testing equipment according to claim 5, characterized in that: It also includes a handle (10), the outer sides of the two transparent protective doors (9) are fixedly connected with the handle (10), and the two handles (10) are symmetrically arranged.

7. The testing method of an automobile leaf spring testing device according to any one of claims 1 to 6, characterized in that: The following steps are included: Step 1: The staff pushes the two transparent protective doors (9) to open the housing (1), then rotates the two fixing nuts (8) to disengage the fixing nuts (8) from the mounting rods (3), puts the leaf spring (1001) on the two mounting rods (3), then reverses the fixing nuts (8) back onto the mounting rods (3), limits the leaf spring (1001), and then closes the two transparent protective doors (9); Step 2: Then, the two hydraulic cylinders (41) are started, and the telescopic shafts of the two hydraulic cylinders (41) are alternately extended and retracted, so that the two magnetic extrusion plates (44) alternately squeeze the leaf spring (1001), and a rapid compression test is performed on the leaf spring (1001); Step 3: When the leaf spring (1001) is squeezed, it pushes the driving rod (62) to move downward. When the driving rod (62) is reset upward, it drives the ratchet (65) to rotate, thereby driving the second magnet (55) to move upward or downward. By adjusting the height of the second magnet (55), the degree to which the magnetic squeezing plate (44) squeezes the leaf spring (1001) is adjusted, and a random compression test is performed on the leaf spring (1001); Step 4: When the driving rod (62) moves downward, it drives the squeezing rod (71) to move downward, thereby squeezing the gas in the first cylinder (72) to flow to the second cylinder (74), pushing the second piston rod (76) and the squeezing plate (77), locking the second magnet (55) so that the second magnet (55) will not move at will; Step 5: After the compression test of the leaf spring (1001) is completed, the staff closes the two hydraulic cylinders (41), opens the two transparent protective doors (9), and then rotates the two fixing nuts (8) to disengage the fixing nuts (8) from the mounting rod (3). The leaf spring (1001) is removed from the housing (1), and then the fixing nuts (8) are reversed back onto the mounting rod (3), and the transparent protective doors (9) are closed.

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