Testing device for testing fatigue of plate spring

Abstract

The utility model relates to the technical field of plate spring testing equipment, and discloses a testing device for testing the fatigue of a plate spring, which comprises a bottom box, a shell fixedly mounted at the top of the bottom box, a testing mechanism arranged on the shell, two fixed seats fixedly mounted at the top of the bottom box, a sliding seat slidably mounted on the fixed seats, two U-shaped grooves and two grooves formed in the top of the sliding seat, and a clamping mechanism arranged on the U-shaped grooves, the groove is located between the two U-shaped grooves, a plate spring is arranged in the groove, and a connecting mechanism is arranged between the plate spring and the U-shaped grooves; a protection mechanism is arranged on the bottom box, and two rotating shafts are rotationally installed on the inner wall of the rear side of the bottom box. Compared with the prior art, the device has the following advantages and effects that by arranging the protection mechanism, when the stamping head descends to conduct fatigue inspection on the plate spring, the protection plate can be driven to extend upwards from the plate hole, the blocking effect can be achieved through the protection plate, and the purposes that fragments generated by fatigue fracture of the plate spring are prevented from splashing to injure people, and the safety of operators is guaranteed can be achieved.

Description

Technical Field

[0001] This application relates to the technical field of leaf spring testing equipment, and in particular to a testing device for testing the fatigue of leaf springs. Background Technology

[0002] Leaf springs are widely used suspension elastic elements in traditional automobiles. Their advantages include simple structure, reliable operation, low cost, and convenient maintenance. They serve as both the elastic element and the guiding device of the suspension. One end is hinged to the vehicle frame, allowing it to transmit various forces and torques and determine the trajectory of the wheels. At the same time, they also have a certain frictional damping effect. They are widely used in non-independent suspensions. Therefore, the performance and quality of leaf springs, especially their fatigue life, are directly related to vehicle operating safety.

[0003] A search revealed that patent document CN221405070U discloses a fatigue testing device for leaf springs, including an operating table. A fixed frame and a mounting base are fixedly connected to the top of the operating table. An air hammer is fixedly connected to the top of the inner cavity of the fixed frame. Electric push rods are fixedly connected to both sides of the fixed frame. The output end of the electric push rod passes through the inner cavity of the fixed frame and is fixedly connected to a limiting shell. A rod is installed inside the limiting shell. A bidirectional threaded rod is movably connected to the left side of the inner cavity of the mounting base. This invention solves the problem that existing fatigue testing devices are inconvenient for installing different types of leaf springs, requiring the use of matching tools, thus reducing the working efficiency of the fatigue testing device.

[0004] In practical use, it has been found that existing devices do not have a protective mechanism. If the leaf spring breaks due to fatigue failure, it cannot prevent the leaf spring fragments from breaking, which can easily lead to injury to workers. Therefore, we propose a test device for testing the fatigue of leaf springs to solve the above problems. Utility Model Content

[0005] The purpose of this application is to address the shortcomings of existing technologies, which can prevent leaf spring fragments from being separated, thus easily causing injury to workers. The application proposes a testing device for testing the fatigue of leaf springs.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: a testing device for testing the fatigue of leaf springs, comprising a base box, a housing fixedly installed on the top of the base box, a testing mechanism provided on the housing, two fixed seats fixedly installed on the top of the base box, a slide seat slidably installed on the fixed seats, two U-shaped grooves and a recessed groove opened on the top of the slide seat, the recessed groove being located between the two U-shaped grooves, a leaf spring being provided in the recessed groove, and a connecting mechanism being provided between the leaf spring and the U-shaped groove; a protective mechanism is provided on the base box, two rotating shafts are rotatably installed on the rear inner wall of the base box, the front end of the rotating shafts being rotatably connected to the front inner wall of the base box, and two through holes are opened on the top of the base box.

[0007] A further configuration of this application is as follows: the inspection mechanism includes a hydraulic cylinder, a lifting plate, and a punch head. A hydraulic cylinder is fixedly installed on the top of the housing, and the output shaft of the hydraulic cylinder extends into the housing. The same lifting plate is slidably installed on the inner walls of both sides of the housing. A punch head is provided at the bottom of the lifting plate. The punch head is adapted to a leaf spring. Two buffer cylinders are fixedly installed at the bottom of the lifting plate. The punch head is located between the two buffer cylinders. An anti-jump mechanism is provided on the buffer cylinders. A sliding mechanism is provided between the lifting plate and the housing.

[0008] By adopting the above technical solution and setting up an inspection mechanism, the hydraulic cylinder can drive the stamping head to descend, thereby applying periodic pressure to the leaf spring through the stamping head, simulating the stress situation of the leaf spring in actual use, and thus testing the fatigue degree of the leaf spring.

[0009] A further configuration of this application is as follows: the anti-jump mechanism includes a sliding column, a sliding plate, a spring, and an anti-jump plate. A sliding column is slidably installed at the bottom of the buffer cylinder, a sliding plate is slidably installed on the inner wall of the buffer cylinder, the bottom of the sliding plate is fixedly connected to the top of the sliding column, the top of the sliding plate and the top inner wall of the buffer cylinder are fixedly installed with the same spring, and an anti-jump plate is fixedly installed at the bottom of the sliding column.

[0010] By adopting the above technical solution and setting an anti-jump mechanism, the spring can press the anti-jump plate and the ball together with its elastic force, which can prevent the coil and pin from jumping out of the U-shaped groove and falling off. This can prevent the leaf spring from jumping or other unstable phenomena during the stamping inspection process, thereby ensuring the stability of the test process and the accuracy of the data.

[0011] A further feature of this application is that the connecting mechanism includes a coiled lug and a pin, both ends of the leaf spring are fixedly fitted with coiled lugs, and a pin is inserted into the coiled lug, the pin being adapted to a U-shaped groove.

[0012] By adopting the above technical solution and by setting a connecting mechanism, the lugs at both ends of the leaf spring are connected to the U-shaped groove on the top of the slide block through pins, thereby fixing the leaf spring on the test device.

[0013] A further feature of this application is that the sliding mechanism includes a slider and a groove, with sliders provided on both sides of the lifting plate, and grooves provided on both inner walls of the housing, with the sliders slidably connected to the corresponding grooves.

[0014] By adopting the above technical solution and incorporating a sliding mechanism, the lifting plate moves more smoothly up and down.

[0015] A further feature of this application is that the protective mechanism includes a protective plate and a plate hole. The plate hole is located between two through holes on the top of the bottom box. The plate hole is located on the front side of the fixed seat. The protective plate is slidably installed in the plate hole. A gear mechanism is provided between the protective plate and the rotating shaft.

[0016] By adopting the above technical solution and setting up a protective mechanism, the protective plate can act as a barrier, thereby preventing the flying fragments caused by the leaf spring's fatigue fracture from injuring people and ensuring the safety of operators.

[0017] A further configuration of this application is as follows: the gear mechanism includes a gear, a first rack plate and a second rack plate, a gear is fixedly sleeved on the rotating shaft, a first rack plate is fixedly installed at the bottom of the lifting plate, the first rack plate is adapted to the corresponding through hole, and a second rack plate is fixedly installed on both sides of the protective plate, and the gear meshes with the first rack plate and the second rack plate.

[0018] By adopting the above technical solution and by setting up a gear mechanism, the lifting plate can drive the protective plate to move up and down.

[0019] A further feature of this application is that the top of the slide block is provided with ball bearings, which are located on both sides of the U-shaped groove, and the anti-skid plate is adapted to the ball bearings.

[0020] By adopting the above technical solution and incorporating ball bearings, the slide can slide at the bottom of the anti-skid plate, thus avoiding the impact of the anti-skid plate on the fatigue test of the leaf spring.

[0021] The beneficial effects of this application are:

[0022] (1) By cooperating with the hydraulic cylinder, lifting plate, stamping head and leaf spring, the hydraulic cylinder can drive the stamping head to apply periodic pressure to the leaf spring, simulating the stress situation of the leaf spring in actual use, so as to test the fatigue of the leaf spring.

[0023] (2) By combining springs, sliding plates, sliding columns and anti-jump plates, the anti-jump plates and rolling balls can be pressed together by the spring force, which can prevent the coil and pin from jumping out of the U-shaped groove and falling off, and can prevent the leaf spring from jumping and other unstable phenomena during the stamping inspection process, thereby ensuring the stability of the test process and the accuracy of the data.

[0024] (3) Through the cooperation of the lifting plate, the first rack plate, the gear, the rotating shaft, the second rack plate and the protective plate, when the punching head descends to perform fatigue testing on the leaf spring, it can drive the protective plate to extend upward from the plate hole. The protective plate can play a blocking role, which can prevent the leaf spring from flying fragments due to fatigue fracture and injure people, thus ensuring the safety of the operators. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a three-dimensional structural schematic diagram of a test device for testing the fatigue of leaf springs according to this application;

[0027] Figure 2 This is a schematic diagram of the main structure of a test device for testing the fatigue of leaf springs according to this application;

[0028] Figure 3 This is a schematic diagram of the internal structure of the bottom box, the internal shell, and the internal structure of the buffer cylinder of the test device for testing the fatigue of leaf springs according to this application;

[0029] Figure 4 This is a schematic diagram of structure A of a test device for testing the fatigue of leaf springs according to this application.

[0030] In the diagram: 1. Base box; 2. Shell; 3. Fixed base; 301. Slide; 302. U-shaped groove; 4. Leaf spring; 401. Roller lug; 402. Pin; 5. Buffer cylinder; 501. Slide column; 502. Slide plate; 503. Spring; 504. Anti-jump plate; 505. Ball bearing; 6. Rotating shaft; 601. Gear; 602. First rack plate; 603. Second rack plate; 7. Protective plate; 8. Plate hole; 9. Slider; 201. Hydraulic cylinder; 202. Lifting plate; 203. Punch head. Detailed Implementation

[0031] The technical solution of this application will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0032] See Figures 1-4This application provides a testing device for testing the fatigue of leaf springs, including a base box 1, a housing 2 fixedly installed on the top of the base box 1, a testing mechanism provided on the housing 2, two fixed seats 3 fixedly installed on the top of the base box 1, a slide 301 slidably installed on the fixed seats 3, two U-shaped grooves 302 and a recessed groove are opened on the top of the slide 301, the recessed groove is located between the two U-shaped grooves 302, a leaf spring 4 is arranged in the recessed groove, and a connecting mechanism is provided between the leaf spring 4 and the U-shaped grooves 302; a protective mechanism is provided on the base box 1, two rotating shafts 6 are rotatably installed on the rear inner wall of the base box 1, the front end of the rotating shafts 6 is rotatably connected to the front inner wall of the base box 1, and two through holes are opened on the top of the base box 1.

[0033] Specifically, the inspection mechanism includes a hydraulic cylinder 201, a lifting plate 202, and a punch head 203. The hydraulic cylinder 201 is fixedly installed on the top of the housing 2, and the output shaft of the hydraulic cylinder 201 extends into the housing 2. The same lifting plate 202 is slidably installed on the inner walls of both sides of the housing 2. The punch head 203 is provided at the bottom of the lifting plate 202 and is adapted to the leaf spring 4. Two buffer cylinders 5 are fixedly installed at the bottom of the lifting plate 202, and the punch head 203 is located between the two buffer cylinders 5. An anti-jump mechanism is provided on the buffer cylinders 5, and a sliding mechanism is provided between the lifting plate 202 and the housing 2.

[0034] Specifically, the anti-jump mechanism includes a sliding column 501, a sliding plate 502, a spring 503, and an anti-jump board 504. The sliding column 501 is slidably installed at the bottom of the buffer cylinder 5, and the sliding plate 502 is slidably installed on the inner wall of the buffer cylinder 5. The bottom of the sliding plate 502 is fixedly connected to the top of the sliding column 501. The top of the sliding plate 502 and the top inner wall of the buffer cylinder 5 are fixedly installed with the same spring 503. The anti-jump board 504 is fixedly installed at the bottom of the sliding column 501.

[0035] Specifically, the connecting mechanism includes a lug 401 and a pin 402. Both ends of the leaf spring 4 are fixedly installed with lugs 401, and pins 402 are inserted into the lugs 401. The pins 402 are adapted to the U-shaped grooves 302.

[0036] Specifically, the sliding mechanism includes sliders 9 and slide grooves. Sliders 9 are provided on both sides of the lifting plate 202, and slide grooves are provided on both sides of the inner wall of the housing 2. The sliders 9 are slidably connected to the corresponding slide grooves.

[0037] Specifically, the protective mechanism includes a protective plate 7 and a plate hole 8. The bottom box 1 has a plate hole 8 on its top. The plate hole 8 is located between two through holes and is located on the front side of the fixed seat 3. The protective plate 7 is slidably installed in the plate hole 8. A gear mechanism is provided between the protective plate 7 and the rotating shaft 6.

[0038] Specifically, the gear mechanism includes a gear 601, a first rack plate 602, and a second rack plate 603. The gear 601 is fixedly sleeved on the rotating shaft 6. The first rack plate 602 is fixedly installed at the bottom of the lifting plate 202. The first rack plate 602 is adapted to the corresponding through hole. The second rack plate 603 is fixedly installed on both sides of the protective plate 7. The gear 601 meshes with the first rack plate 602 and the second rack plate 603.

[0039] Specifically, the top of the slide 301 is provided with ball bearings 505, which are located on both sides of the U-shaped groove 302. The anti-skid plate 504 is adapted to the ball bearings 505.

[0040] In this application, during operation, the leaf spring 4 is first placed in the groove of the slide 301. The lugs 401 at both ends of the leaf spring 4 are connected to the U-shaped groove 302 at the top of the slide 301 through the pin 402, thereby fixing the leaf spring 4 on the test device so that it can withstand the subsequent loading test.

[0041] Hydraulic cylinder 201 is activated, and its output shaft pushes lifting plate 202 downward along the grooves on both sides of housing 2. During this process, slider 9 acts as a guide and support in the groove, ensuring that lifting plate 202 moves smoothly and vertically. As lifting plate 202 descends, its bottom stamping head 203 gradually approaches leaf spring 4 and applies periodic pressure to leaf spring 4, simulating the stress situation of leaf spring in actual use, thereby testing the fatigue of leaf spring. During the stamping process of stamping head 203 on leaf spring 4, anti-jump plate 504 first contacts ball 505, and sliding column 501 slides upward in buffer cylinder 5, compressing spring 503. Spring 503 can press anti-jump plate 504 and ball 505 together through elastic force, which can prevent the lug 401 and pin 402 from jumping out of U-groove 302 and prevent leaf spring 4 from jumping or other unstable phenomena during stamping test, thereby ensuring the stability of the test process and the accuracy of the data.

[0042] When the lifting plate 202 descends, its bottom first rack plate 602 also descends. The first rack plate 602 meshes with the gear 601 on the rotating shaft 6, driving the gear 601 to rotate. The rotation of the gear 601, in turn, drives the second rack plates 603 on both sides of the protective plate 7 to move, thereby causing the protective plate 7 to extend upward from the plate hole 8. During the test, the protective plate 7 can act as a barrier, preventing the fragments of the leaf spring 4 from flying and injuring people due to fatigue fracture, thus ensuring the safety of the operators. When the lifting plate 202 rises, through the transmission of the rack and gear, the protective plate 7 will automatically fall back into the plate hole 8, without interfering with other operations and maintenance of the testing device.

Claims

1. A testing device for inspecting the fatigue degree of leaf springs, characterized in that, Includes a base box (1), a housing (2) is fixedly installed on the top of the base box (1), an inspection mechanism is provided on the housing (2), two fixed seats (3) are fixedly installed on the top of the base box (1), a slide (301) is slidably installed on the fixed seat (3), two U-shaped grooves (302) and a groove are opened on the top of the slide (301), the groove is located between the two U-shaped grooves (302), a leaf spring (4) is provided in the groove, and a connecting mechanism is provided between the leaf spring (4) and the U-shaped groove (302); The bottom box (1) is provided with a protective mechanism. Two rotating shafts (6) are rotatably installed on the inner rear wall of the bottom box (1). The front end of the rotating shafts (6) is rotatably connected to the inner front wall of the bottom box (1). Two through holes are opened on the top of the bottom box (1). The inspection mechanism includes a hydraulic cylinder (201), a lifting plate (202), and a punch head (203). The hydraulic cylinder (201) is fixedly installed on the top of the housing (2). The output shaft of the hydraulic cylinder (201) extends into the housing (2). The same lifting plate (202) is slidably installed on the inner walls of both sides of the housing (2). A punch head (203) is provided at the bottom of the lifting plate (202). The punch head (203) is adapted to the leaf spring (4). Two buffer cylinders (5) are fixedly installed at the bottom of the lifting plate (202). The punch head (203) is located between the two buffer cylinders (5). An anti-jump mechanism is provided on the buffer cylinder (5). A sliding mechanism is provided between the lifting plate (202) and the housing (2).

2. The testing device for testing the fatigue degree of a leaf spring according to claim 1, characterized in that: The anti-jump mechanism includes a sliding column (501), a sliding plate (502), a spring (503), and an anti-jump plate (504). The sliding column (501) is slidably installed at the bottom of the buffer cylinder (5), and the sliding plate (502) is slidably installed on the inner wall of the buffer cylinder (5). The bottom of the sliding plate (502) is fixedly connected to the top of the sliding column (501). The top of the sliding plate (502) and the top inner wall of the buffer cylinder (5) are fixedly installed with the same spring (503). The anti-jump plate (504) is fixedly installed at the bottom of the sliding column (501).

3. The testing device for testing the fatigue degree of a leaf spring according to claim 1, characterized in that: The connecting mechanism includes a coil (401) and a pin (402). The coil (4) is fixedly installed at both ends. The pin (402) is inserted into the coil (401) and is adapted to the U-shaped groove (302).

4. The testing device for testing the fatigue degree of a leaf spring according to claim 1, characterized in that: The sliding mechanism includes a slider (9) and a groove. The lifting plate (202) is provided with sliders (9) on both sides. The inner walls of both sides of the housing (2) are provided with grooves. The sliders (9) are slidably connected to the corresponding grooves.

5. The testing device for testing the fatigue degree of a leaf spring according to claim 1, characterized in that: The protective mechanism includes a protective plate (7) and a plate hole (8). The bottom box (1) has a plate hole (8) on its top. The plate hole (8) is located between two through holes. The plate hole (8) is located on the front side of the fixed seat (3). The protective plate (7) is slidably installed in the plate hole (8). A gear mechanism is provided between the protective plate (7) and the rotating shaft (6).

6. The testing device for testing the fatigue degree of a leaf spring according to claim 5, characterized in that: The gear mechanism includes a gear (601), a first rack plate (602) and a second rack plate (603). The gear (601) is fixedly sleeved on the rotating shaft (6). The first rack plate (602) is fixedly installed at the bottom of the lifting plate (202). The first rack plate (602) is adapted to the corresponding through hole. The second rack plate (603) is fixedly installed on both sides of the protective plate (7). The gear (601) meshes with the first rack plate (602) and the second rack plate (603).

7. The testing device for testing the fatigue degree of a leaf spring according to claim 2, characterized in that: The top of the slide (301) is provided with a ball bearing (505), which is located on both sides of the U-shaped groove (302). The anti-jump plate (504) is adapted to the ball bearing (505).

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