Fatigue test device

Abstract

The utility model discloses a fatigue test device, which belongs to the technical field of fatigue tests, aims at solving the problems that metal materials with different specifications cannot be fixed and a friction head is inconvenient to replace, and comprises a base, supporting legs, a test bed, a clamping mechanism, an air cylinder, a connecting plate and a replacing mechanism, the supporting legs are symmetrically and fixedly connected to the top face of a bottom plate of the base, the test bed is fixedly connected to the upper portions of the supporting legs, the clamping mechanism is fixedly connected to the upper portion of a top plate of the base, the connecting plate is fixedly connected to the output end of the air cylinder, the replacing mechanism is arranged below the connecting plate, and the motor is fixedly connected to the front face of the test bed. By means of the clamping mechanism, metal materials of different specifications and sizes can be fixed between the two clamping plates, then the metal materials are pressed through the pressing plate, the fixing stability of the device to the metal materials is improved, and meanwhile the application range of the device is widened.

Description

Technical Field

[0001] This utility model belongs to the field of fatigue testing technology, and specifically relates to a fatigue testing device. Background Technology

[0002] With the widespread application of metallic materials in metallurgy, rail vehicles, manufacturing and other fields, especially in bearings, gears, rolls, wheel rims and other components, which are often used under high-speed and heavy-load operating conditions, rolling contact fatigue testing of metallic materials is extremely important. It can provide important basis for the design, material selection and development of cold and hot working processes for these parts.

[0003] The prior art includes an adjustable metal contact fatigue performance testing device with patent publication number CN213209806U. This patent allows for simultaneous contact fatigue performance testing of multiple metal materials, increasing the number of metal materials that can be tested in a single run and effectively solving the problem that existing contact fatigue testing machines cannot test multiple metal materials simultaneously. However, in practical use, the following shortcomings remain: In practice, this device can only press and fix metal materials of the same size during fatigue testing, and cannot fix metal materials of different specifications, reducing the device's applicability. Furthermore, after long-term friction testing with metal materials, the friction head will wear out and need to be replaced. The existing structure makes replacing the friction head cumbersome and difficult, affecting replacement efficiency.

[0004] Therefore, a fatigue testing device is needed to solve the problems of existing technologies, such as the inability to fix metal materials of different specifications and the inconvenience of replacing the friction head. Utility Model Content

[0005] The purpose of this invention is to provide a fatigue testing device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fatigue testing device, comprising a base, supporting legs, a test platform, a clamping mechanism, a cylinder, a connecting plate, and a replacement mechanism. The supporting legs are symmetrically and fixedly connected to the top surface of the base plate, the test platform is fixedly connected above the supporting legs, the clamping mechanism is fixedly connected above the top plate of the base, the connecting plate is fixedly connected to the output end of the cylinder, and the replacement mechanism is located below the connecting plate.

[0007] The clamping mechanism consists of a motor, a bidirectional threaded rod, a fixed rod, a moving plate, a connecting block, a clamping plate, a sliding rod, a pressure plate, and a first spring. The motor is fixedly connected to the front of the test bench, the bidirectional threaded rod is rotatably connected to the inside of the test bench, the bidirectional threaded rod is connected to the output end of the motor, and the moving plate is symmetrically threaded to the outside of the bidirectional threaded rod.

[0008] It should be noted in the solution that the fixed rod is symmetrically fixedly connected to the inside of the test bench, and the movable plate is slidably connected to the outside of the fixed rod.

[0009] It is further worth noting that the connecting block is symmetrically and fixedly connected above the moving plate, the clamping plate is fixedly connected above the connecting block, the slide rod is slidably connected to the upper and lower sides of the upper plate of the clamping plate, and the pressure plate is fixedly connected to the bottom surface of the slide rod.

[0010] Furthermore, it should be noted that the first spring is symmetrically and fixedly connected between the bottom surface of the upper plate of the pressure plate and the clamping plate, and the bottom surface of the pressure plate is provided with a buffer layer.

[0011] In a preferred embodiment, the replacement mechanism consists of a mounting block, a positioning post, a baffle, a second spring, a friction head, and a mounting post. The bottom surface of the mounting block is evenly provided with mounting grooves. The positioning post is symmetrically slidably connected to the front and rear sides of the mounting groove. The baffle is fixedly connected to the end of the positioning post away from the mounting groove.

[0012] In a preferred embodiment, the second spring is fixedly connected between the baffle and the outer wall of the mounting block, and the second spring is sleeved on the outside of the positioning post. Under the elastic action of the second spring, the positioning post is driven to reset, causing the positioning post to insert into the interior of the positioning groove, thus fixing the installation of the mounting post.

[0013] In a preferred embodiment, the mounting post is disposed inside the mounting groove, and positioning grooves adapted to the positioning post are symmetrically opened on both sides of the mounting post. The friction head is fixedly connected to the bottom of the mounting post.

[0014] Compared with the prior art, the fatigue testing device provided by this utility model includes at least the following:

[0015] Beneficial effects:

[0016] (1) By setting up a clamping mechanism, metal materials of different specifications and sizes can be fixed between two clamping plates, and then the metal materials are pressed by a pressure plate, which improves the stability of the device in fixing metal materials and also improves the applicability of the device.

[0017] (2) By using the replacement mechanism, the baffle is pulled away from the side of the mounting groove, so that the positioning pin is removed from the inside of the positioning groove, and the friction head can be removed. The friction head can be quickly replaced. The structure is simple, the operation is convenient, and the replacement efficiency is improved. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0020] Figure 3 This is a schematic diagram of the clamping mechanism of this utility model;

[0021] Figure 4 This is a schematic diagram of the replacement mechanism of this utility model.

[0022] In the diagram: 1. Base; 2. Support leg; 3. Test bench; 4. Clamping mechanism; 5. Cylinder; 6. Connecting plate; 7. Replacement mechanism; 401. Motor; 402. Bidirectional threaded rod; 403. Fixed rod; 404. Moving plate; 405. Connecting block; 406. Clamping plate; 407. Slide rod; 408. Pressure plate; 409. First spring; 701. Mounting block; 702. Mounting groove; 703. Positioning post; 704. Baffle; 705. Second spring; 706. Friction head; 707. Mounting post; 708. Positioning groove. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments.

[0024] Please see Figure 1-4 This utility model provides a fatigue testing device, including a base 1, a support leg 2, a test platform 3, a clamping mechanism 4, a cylinder 5, a connecting plate 6, and a replacement mechanism 7. The support leg 2 is symmetrically and fixedly connected to the top surface of the base plate of the base 1. The test platform 3 is fixedly connected above the support leg 2. The clamping mechanism 4 is fixedly connected above the top plate of the base 1. The connecting plate 6 is fixedly connected to the output end of the cylinder 5. The replacement mechanism 7 is located below the connecting plate 6.

[0025] The clamping mechanism 4 consists of a motor 401, a bidirectional threaded rod 402, a fixed rod 403, a moving plate 404, a connecting block 405, a clamping plate 406, a sliding rod 407, a pressure plate 408, and a first spring 409. The motor 401 is fixedly connected to the front of the test bench 3, the bidirectional threaded rod 402 is rotatably connected to the inside of the test bench 3, the bidirectional threaded rod 402 is connected to the output end of the motor 401, and the moving plate 404 is symmetrically threaded to the outside of the bidirectional threaded rod 402.

[0026] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth noting that the fixed rod 403 is symmetrically fixedly connected to the inside of the test bench 3, and the movable plate 404 is slidably connected to the outside of the fixed rod 403;

[0027] The fixed rod 403 restricts the movement of the moving plate 404, preventing the moving plate 404 from rotating with the bidirectional threaded rod 402 and ensuring that the moving plate 404 moves stably in a straight line.

[0028] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth noting that the connecting block 405 is symmetrically and fixedly connected to the upper part of the moving plate 404, the clamping plate 406 is fixedly connected to the upper part of the connecting block 405, the slide rod 407 is slidably connected to the upper and lower sides of the upper plate of the clamping plate 406, and the pressure plate 408 is fixedly connected to the bottom surface of the slide rod 407.

[0029] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth noting that the first spring 409 is symmetrically fixed between the bottom surface of the upper plate of the pressure plate 408 and the clamping plate 406, and a buffer layer is provided on the bottom surface of the pressure plate 408.

[0030] The buffer layer is used to compress the metal material, preventing damage to it.

[0031] As can be seen from the above working process, the clamping mechanism 4 can fix metal materials of different specifications and sizes between the two clamping plates 406, and then the pressure plate 408 can press the metal materials tightly, thereby improving the stability of the device in fixing the metal materials and increasing the applicability of the device.

[0032] Further as Figure 1 , Figure 2 and Figure 4 As shown, it is worth noting that the replacement mechanism 7 consists of a mounting block 701, a positioning post 703, a baffle 704, a second spring 705, a friction head 706, and a mounting post 707. The bottom surface of the mounting block 701 is evenly provided with mounting grooves 702. The positioning post 703 is symmetrically slidably connected to the front and rear sides of the mounting groove 702. The baffle 704 is fixedly connected to the end of the positioning post 703 away from the mounting groove 702. The second spring 705 is fixedly connected between the baffle 704 and the outer wall of the mounting block 701, and the second spring 705 is sleeved on the outside of the positioning post 703.

[0033] Under the elastic action of the second spring 705, the positioning post 703 is reset, so that the positioning post 703 is inserted into the positioning groove 708, and the installation of the mounting post 707 is fixed.

[0034] Further as Figure 1 , Figure 2 and Figure 4 As shown, it is worth noting that the mounting post 707 is located inside the mounting groove 702, and the mounting post 707 has symmetrically provided positioning grooves 708 on both sides that are adapted to the positioning post 703. The friction head 706 is fixedly connected to the bottom of the mounting post 707.

[0035] When the friction head 706 is damaged and needs to be replaced, pull the baffles 704 on both sides outward to drive the positioning post 703 out of the positioning groove 708, and the mounting post 707 can be removed.

[0036] This solution has the following working process: During use, the metal material is placed above the test bench 3. Then, the motor 401 is started, driving the bidirectional threaded rod 402 to rotate. The fixed rod 403 restricts the moving plate 404, preventing it from rotating with the bidirectional threaded rod 402 and ensuring stable linear movement. The connecting block 405 moves the upper clamping plate 406 until it clamps the metal material. Then, the elastic action of the first spring 409 causes the pressure plate 408 to reset and move downwards. The buffer layer below the pressure plate 408 presses the metal material firmly, preventing damage. Finally, the cylinder 5 moves the connecting plate 6 downwards. The friction head 706 continues to slide over the metal material until it contacts it. This allows for fatigue testing of the metal material. After multiple tests, if the friction head 706 becomes damaged, it needs to be replaced. Pulling the baffles 704 outwards causes the positioning post 703 to disengage from the positioning groove 708, allowing the mounting post 707 to be removed and the friction head 706 replaced. The new mounting post 707 is inserted into the mounting groove 702. Releasing the baffles 704 allows the positioning post 703 to reset under the elastic action of the second spring 705, inserting it into the positioning groove 708 and securing the mounting post 707 to ensure the stability of the friction head 706 installation.

[0037] In summary: The clamping mechanism 4 can fix metal materials of different specifications and sizes between the two clamping plates 406, and then the pressure plate 408 can press the metal materials tightly, improving the stability of the device in fixing the metal materials and expanding the applicability of the device; The replacement mechanism 7 can pull the baffle 704 away from the mounting groove 702, so that the positioning post 703 is disengaged from the inside of the positioning groove 708, and the friction head 706 can be removed, which allows for quick replacement of the friction head 706. The structure is simple, the operation is convenient, and the replacement efficiency is improved.

Claims

1. A fatigue testing device, comprising a base (1), supporting legs (2), a test platform (3), a clamping mechanism (4), a cylinder (5), a connecting plate (6), and a replacement mechanism (7), characterized in that: The support leg (2) is symmetrically fixedly connected to the top surface of the base plate of the base (1), the test bench (3) is fixedly connected above the support leg (2), the clamping mechanism (4) is fixedly connected above the top plate of the base (1), the connecting plate (6) is fixedly connected to the output end of the cylinder (5), and the replacement mechanism (7) is located below the connecting plate (6). The clamping mechanism (4) consists of a motor (401), a bidirectional threaded rod (402), a fixed rod (403), a moving plate (404), a connecting block (405), a clamping plate (406), a sliding rod (407), a pressure plate (408), and a first spring (409). The motor (401) is fixedly connected to the front of the test bench (3), the bidirectional threaded rod (402) is rotatably connected to the inside of the test bench (3), the bidirectional threaded rod (402) is connected to the output end of the motor (401), and the moving plate (404) is symmetrically threaded to the outside of the bidirectional threaded rod (402).

2. The fatigue testing apparatus according to claim 1, characterized in that: The fixed rod (403) is symmetrically fixedly connected to the inside of the test bench (3), and the movable plate (404) is slidably connected to the outside of the fixed rod (403).

3. The fatigue testing apparatus according to claim 1, characterized in that: The connecting block (405) is symmetrically fixedly connected above the moving plate (404), the clamping plate (406) is fixedly connected above the connecting block (405), the sliding rod (407) is slidably connected to the upper and lower sides of the upper plate of the clamping plate (406), and the pressure plate (408) is fixedly connected to the bottom surface of the sliding rod (407).

4. The fatigue testing apparatus according to claim 1, characterized in that: The first spring (409) is symmetrically fixed between the bottom surface of the upper plate of the pressure plate (408) and the clamping plate (406), and the bottom surface of the pressure plate (408) is provided with a buffer layer.

5. The fatigue testing apparatus according to claim 1, characterized in that: The replacement mechanism (7) consists of a mounting block (701), a positioning post (703), a baffle (704), a second spring (705), a friction head (706), and a mounting post (707). The bottom surface of the mounting block (701) is evenly provided with mounting grooves (702). The positioning post (703) is symmetrically slidably connected to the front and rear sides of the mounting groove (702). The baffle (704) is fixedly connected to the end of the positioning post (703) away from the mounting groove (702).

6. The fatigue testing apparatus according to claim 5, characterized in that: The second spring (705) is fixedly connected between the baffle (704) and the outer wall of the mounting block (701), and the second spring (705) is sleeved on the outside of the positioning post (703). Under the elastic action of the second spring (705), the positioning post (703) is driven to reset, so that the positioning post (703) is inserted into the inside of the positioning groove (708) to fix the installation of the mounting post (707).

7. The fatigue testing apparatus according to claim 5, characterized in that: The mounting post (707) is located inside the mounting groove (702). The mounting post (707) has symmetrically provided positioning grooves (708) on both sides that are adapted to the positioning post (703). The friction head (706) is fixedly connected to the bottom of the mounting post (707).

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