A device for testing the wear and fatigue of a guide seat of a rack car

Abstract

The application discloses a kind of fixed frame car machine guide seat wear and tear fatigue test device, including test bench, test box and drive mechanism, test bench includes upper cover plate, lower bottom plate and multiple support columns connecting upper cover plate and lower bottom plate, and multiple support columns are surrounded and are formed a cavity for accommodating test box, first through-hole for accommodating guide seat is provided on upper cover plate, first recess for accommodating guide seat is provided on lower bottom plate, second through-hole is opened in the upper and lower of test box, and pressure roller is installed on the both sides of test box, and pressure roller is used to be tightly contacted with the outer surface of lifting column of guide seat, drive mechanism is used to drive guide seat to move up and down along vertical direction and penetrate second through-hole, when guide seat moves up and down, rotate by friction force to simulate real working condition environment to measure the service life of frame car machine guide seat.The application can accurately measure the service life of frame car machine guide seat, and can improve the use safety performance of fixed frame car machine.

Description

Technical Field

[0001] This invention mainly relates to the field of wear fatigue testing technology for fixed frame vehicle engine guide seats, and specifically refers to a wear fatigue testing device for fixed frame vehicle engine guide seats. Background Technology

[0002] In the manufacturing process of urban rail trains, a lifting jack is needed to raise the multi-million dollar car body to a predetermined height before undercarriage assembly. Fixed lifting jacks are special-purpose lifting equipment, and their guide seats are critical load-bearing components. Existing fixed lifting jack guide seats, due to their large load-bearing capacity and size, are prone to wear during jack preparation and lifting operations. This leads to frequent abnormal noises from the lifting jack and accelerates its damage. If fatigue damage occurs, it can affect the lifting jack's operational functions, or even cause serious accidents such as jack collapse, vehicle collapse, and personal injury. Therefore, designing a wear fatigue testing device for fixed lifting jack guide seats to test the fatigue life of the lifting jack is a technical problem urgently needing to be solved by those skilled in the art. Summary of the Invention

[0003] To address the technical problems existing in the prior art, the present invention provides a wear and fatigue testing device for the guide seat of a fixed car jacking machine that can accurately measure the service life of the guide seat and improve the safety performance of the fixed car jacking machine.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A wear fatigue testing device for a fixed car jack guide seat includes a test bench, a test chamber, and a drive mechanism. The test bench includes an upper cover plate, a lower base plate, and multiple support columns connecting the upper cover plate and the lower base plate. The multiple support columns form a cavity for accommodating the test chamber. The upper cover plate has a first through hole for accommodating the drive mechanism, and the lower base plate has a first groove for accommodating the guide seat. The test chamber has second through holes at the top and bottom. Pressure rollers are installed on both sides of the test chamber. The pressure rollers are used to press against the outer surface of the lifting column of the guide seat. The drive mechanism is used to drive the guide seat to move up and down through the second through hole. When the guide seat moves up and down, the friction force drives the pressure rollers to rotate to simulate the real working environment and measure the service life of the car jack guide seat.

[0006] As a further improvement of the present invention: the driving mechanism includes a drive motor, a gear shaft, a rack shaft and a connecting disk. The gear shaft and the rack shaft mesh with each other. The connecting disk is located at the bottom of the rack shaft and is used to connect to the guide seat to be tested. The drive motor is connected to the gear shaft and is used to drive the gear shaft to rotate, thereby driving the rack shaft to move up and down.

[0007] As a further improvement of the present invention: the driving mechanism further includes a driving box, the driving box is installed in the first through hole, the upper top wall and lower bottom wall of the driving box are provided with a first circular hole for the rack shaft to pass through, the side wall of the driving box is provided with a second circular hole, the driving motor is connected to the driving box, and the gear shaft passes through the second circular hole and is connected to the output end of the driving motor.

[0008] As a further improvement of the present invention: the axes of the two first circular holes are located on the same vertical line, and the inner rings of the two first circular holes are connected to linear bearings. The bottom end of the rack shaft passes through the linear bearing and the second through hole in the drive box in sequence and extends into the interior of the test chamber.

[0009] As a further improvement of the present invention, two sliding grooves are symmetrically provided on the lower base plate of the test bench.

[0010] As a further improvement of the present invention: both sides of the bottom plate of the test chamber are provided with sliding pins, and the sliding pins are slidably connected to the sliding groove.

[0011] As a further improvement of the present invention: the first groove is disposed in the middle of the two sliding grooves.

[0012] As a further improvement of the present invention: the test chamber includes a test chamber shell, and four pairs of axially symmetrical guide shaft covers are connected to the front and rear side walls of the test chamber shell. Each pair of guide shaft covers is arranged on the same horizontal axis, and an intermediate shaft is provided between each pair of guide shaft covers. The two ends of the intermediate shaft are fixedly connected to the guide shaft covers. Cylindrical bearings are also provided at both ends of the intermediate shaft. The intermediate shaft is connected to the inner ring of the cylindrical bearing, and the pressure roller is arranged on the outer ring of the cylindrical bearing.

[0013] As a further improvement of the present invention: a spacer sleeve is fitted into the middle part of the intermediate shaft.

[0014] As a further improvement of the present invention, the pressure rollers are eight in number.

[0015] Compared with the prior art, the advantages of the present invention are as follows:

[0016] The wear and fatigue testing device for the guide seat of the fixed frame vehicle assembly of the present invention has the following characteristics: During the test, the drive mechanism can perform alternating forward and reverse rotation, driving the guide seat to reciprocate up and down inside the test chamber. Pressure rollers are provided on both sides of the test chamber, and the pressure rollers are in close contact with the outer wall of the guide seat. While the guide seat moves, the pressure rollers are driven to rotate by friction. The friction between the pressure rollers and the lifting column of the guide seat will cause wear on the entire guide seat, and its fatigue life can be tested. This device can simulate the working state of the guide seat of the fixed frame vehicle assembly under real working conditions. The frictional damage between the lifting column of the guide seat and the pressure roller will lead to a reduction in the fatigue life of the entire mechanism. The life measurement of this device is to record the total number of relative movements between the lifting column of the guide seat and the pressure roller. Attached Figure Description

[0017] Fig. 1 This is a schematic diagram of the structure of the present invention in a specific embodiment.

[0018] Fig. 2 This is a schematic diagram of the test bench of the present invention in a specific embodiment.

[0019] Fig. 3 This is a schematic diagram of the test chamber of the present invention in a specific embodiment.

[0020] Fig. 4 This is a schematic diagram of the drive mechanism of the present invention in a specific embodiment.

[0021] Legend:

[0022] 1. Test bench; 101. Upper cover plate; 102. Lower base plate; 103. Support column; 2. Test chamber; 21. Test chamber shell; 22. Guide shaft cover; 23. Intermediate shaft; 24. Cylindrical bearing; 25. Spacer; 3. Guide seat; 4. Drive mechanism; 41. Drive motor; 42. Gear shaft; 43. Rack shaft; 44. Connecting plate; 45. Drive box; 5. First through hole; 6. First groove; 7. Second through hole; 8. Pressure roller; 9. Linear bearing; 10. Slide groove; 11. Sliding pin. Detailed Implementation

[0023] In the description of this invention, it should be understood that the terms "side", "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more unless otherwise explicitly specified.

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figs. 1 to 4 As shown, this embodiment discloses a wear fatigue testing device for a fixed car frame guide seat, including a test bench 1, a test chamber 2, and a drive mechanism 4. The test bench 1 includes an upper cover plate 101, a lower base plate 102, and multiple support columns 103 connecting the upper cover plate 101 and the lower base plate 102. The multiple support columns 103 form a cavity for accommodating the test chamber 2. The upper cover plate 101 has a first through hole 5 for accommodating the drive mechanism 4, and the lower base plate 102 has a first groove 6 for accommodating the guide seat 3. The test chamber 2 has second through holes 7 at the top and bottom. Pressure rollers 8 are installed on both sides of the test chamber 2. The pressure rollers 8 are used to press against the outer surface of the lifting column of the guide seat 3. The drive mechanism 4 is used to drive the guide seat 3 to move up and down through the second through hole 7. When the guide seat 3 moves up and down, the pressure rollers 8 are rotated by friction to simulate the real working environment and measure the service life of the car frame guide seat 3.

[0027] In this embodiment, the wear fatigue testing device for the guide seat of the fixed frame vehicle assembly has a drive mechanism that can perform alternating forward and reverse rotation during the test, causing the guide seat to reciprocate up and down inside the test chamber. Pressure rollers are provided on both sides of the test chamber, and the pressure rollers are in close contact with the outer wall of the lifting column of the guide seat. While the guide seat moves, the pressure rollers are driven to rotate by friction. The friction between the pressure rollers and the lifting column of the guide seat will cause wear on the entire guide seat, and its fatigue life can be tested. This device can simulate the working state of the guide seat of the fixed frame vehicle assembly under real working conditions. Friction damage between the lifting column and the pressure rollers will lead to a reduction in the fatigue life of the entire mechanism. The life measurement of this device is to record the total number of relative movements between the lifting column and the pressure rollers.

[0028] In this embodiment, the drive mechanism 4 includes a drive motor 41, a gear shaft 42, a rack shaft 43, and a connecting disk 44. The gear shaft 42 and the rack shaft 43 mesh with each other. The connecting disk 44 is located at the bottom of the rack shaft 43 and is used to connect to the guide seat 3 to be tested. The drive motor 41 is connected to the gear shaft 42 and is used to drive the gear shaft 42 to rotate, thereby driving the rack shaft 43 to move up and down. The meshing of the gear shaft 42 and the rack shaft 43 and their reciprocating motion improves the operating efficiency and enhances the stability of operation. Furthermore, in a preferred embodiment, the connecting disk 44 and the guide seat 3 are connected by a thread.

[0029] In this embodiment, the drive mechanism 4 also includes a drive box 45, which is installed in the first through hole 5. The upper top wall and lower bottom wall of the drive box 45 are provided with first circular holes for the rack shaft 43 to pass through. The side wall of the drive box 45 is provided with a second circular hole. The drive motor 41 is connected to the drive box 45, and the gear shaft 42 passes through the second circular hole and is connected to the output end of the drive motor 41.

[0030] In this embodiment, the axes of the two first circular holes are located on the same vertical line, and the inner rings of the two first circular holes are connected to linear bearings 9. The bottom end of the rack shaft 43 passes through the linear bearing 9 and the second through hole 7 in the drive box 45 and extends into the test chamber 2. By setting the linear bearing 9, the friction on the rack shaft 43 can be effectively reduced, the smoothness of the mechanism operation can be improved, and the service life of the rack shaft 43 can be increased.

[0031] In this embodiment, two symmetrical sliding grooves 10 are formed on the lower base plate 102 of the test bench 1, and sliding pins 11 are provided on both sides of the lower base plate of the test chamber 2. The sliding pins 11 are slidably connected to the sliding grooves 10. Further, in a preferred embodiment, the number of sliding pins 11 on both sides of the lower base plate of the test chamber 2 is not less than three. When using this device for testing, the guide seat 3 may move back and forth perpendicular to the direction of movement during the operation of the mechanism. The sliding connection between the sliding pins 11 and the sliding grooves 10 allows the test chamber 2 to slide smoothly in the back and forth direction, improving its service life.

[0032] In this embodiment, the first groove 6 is located in the middle of the two sliding grooves 10. During the test, the guide seat 3 extends through the test chamber 2 and into the first groove 6.

[0033] In this embodiment, the test chamber 2 includes a test chamber shell 21. The front and rear side walls of the test chamber shell 21 are connected to four pairs of axially symmetrical guide shaft covers 22. Each pair of guide shaft covers 22 is arranged on the same horizontal axis. An intermediate shaft 23 is provided between each pair of guide shaft covers 22. The two ends of the intermediate shaft 23 are fixedly connected to the guide shaft covers 22. The two ends of the intermediate shaft 23 are also provided with cylindrical bearings 24. The intermediate shaft 23 is connected to the inner ring of the cylindrical bearings 24. The pressure rollers 8 are arranged on the outer ring of the cylindrical bearings 24. A spacer 25 is sleeved in the middle of the intermediate shaft 23. During the test, the outer surface of the lifting column of the guide seat 3 is pressed into contact with the eight pressure rollers 8.

[0034] The wear and fatigue testing device for the fixed car jack guide seat in this embodiment has the ability to test the fatigue life of the guide seat 3. This device can simulate the environment under real working conditions and accurately measure the service life of the car jack guide seat 3. After measuring the service life of the device, the working time can be reasonably arranged, which can effectively avoid the occurrence of serious accidents such as car jack collapse, vehicle collapse, or even personal injury and death, and improve the safety of the fixed car jack.

[0035] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should be considered within the scope of protection of the present invention.

Claims

1. A wear fatigue testing device for a fixed frame car guide seat, characterized in that, The test chamber includes a test stand (1), a test chamber (2), and a drive mechanism (4). The test stand (1) includes an upper cover plate (101), a lower base plate (102), and multiple support columns (103) connecting the upper cover plate (101) and the lower base plate (102). The multiple support columns (103) form a cavity for accommodating the test chamber (2). The upper cover plate (101) is provided with a first through hole (5) for accommodating the drive mechanism (4). The lower base plate (102) is provided with a first groove (6) for accommodating the guide seat (3). The test chamber (2) has second through holes (7) at the top and bottom. Pressure rollers (8) are installed on both sides of the test chamber (2). The pressure roller (8) is used to press against the outer surface of the lifting column of the guide seat (3). The drive mechanism (4) is used to drive the guide seat (3) to move up and down through the second through hole (7). When the guide seat (3) moves up and down, the pressure roller (8) is driven to rotate by friction to simulate the real working environment and measure the service life of the car lifting machine guide seat (3). Two sliding grooves (10) are symmetrically provided on the bottom plate (102) of the test bench (1). Sliding nails (11) are provided on both sides of the bottom plate of the test box (2). The sliding nails (11) are slidably connected to the sliding grooves (10). The first groove (6) is located in the middle of the two sliding grooves (10).

2. The wear and fatigue testing device for the fixed frame car guide seat according to claim 1, characterized in that, The drive mechanism (4) includes a drive motor (41), a gear shaft (42), a rack shaft (43), and a connecting plate (44). The gear shaft (42) meshes with the rack shaft (43). The connecting plate (44) is located at the bottom of the rack shaft (43) and is used to connect the guide seat (3) to be tested. The drive motor (41) is connected to the gear shaft (42) and is used to drive the gear shaft (42) to rotate, thereby driving the rack shaft (43) to move up and down.

3. The wear and fatigue testing device for the fixed frame car guide seat according to claim 2, characterized in that, The drive mechanism (4) also includes a drive box (45), which is installed in the first through hole (5). The upper top wall and lower bottom wall of the drive box (45) are provided with a first circular hole for the rack shaft (43) to pass through. The side wall of the drive box (45) is provided with a second circular hole. The drive motor (41) is connected to the drive box (45). The gear shaft (42) passes through the second circular hole and is connected to the output end of the drive motor (41).

4. The wear and fatigue testing device for the fixed frame car guide seat according to claim 3, characterized in that, The axes of the two first circular holes are on the same vertical line, and the inner rings of the two first circular holes are connected to linear bearings (9). The bottom end of the rack shaft (43) passes through the linear bearing (9) and the second through hole (7) in the drive box (45) and extends into the test box (2).

5. The wear and fatigue testing device for the fixed frame car guide seat according to claim 1, characterized in that, The test chamber (2) includes a test chamber shell (21). The front and rear side walls of the test chamber shell (21) are connected to four pairs of axially symmetrical guide shaft covers (22). Each pair of guide shaft covers (22) is arranged on the same horizontal axis. An intermediate shaft (23) is provided between each pair of guide shaft covers (22). The two ends of the intermediate shaft (23) are fixedly connected to the guide shaft covers (22). The two ends of the intermediate shaft (23) are also provided with cylindrical bearings (24). The intermediate shaft (23) is connected to the inner ring of the cylindrical bearing (24). The pressure roller (8) is set on the outer ring of the cylindrical bearing (24).

6. The wear and fatigue testing device for the fixed frame car guide seat according to claim 5, characterized in that, The intermediate shaft (23) is fitted with a spacer (25) in the middle.

7. The wear and fatigue testing device for the fixed frame car guide seat according to any one of claims 1 to 6, characterized in that, There are 8 pressure rollers (8).

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