CN109855889B - Fatigue test system for multi-working-condition tread braking unit - Google Patents
Fatigue test system for multi-working-condition tread braking unit Download PDFInfo
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- CN109855889B CN109855889B CN201711235727.8A CN201711235727A CN109855889B CN 109855889 B CN109855889 B CN 109855889B CN 201711235727 A CN201711235727 A CN 201711235727A CN 109855889 B CN109855889 B CN 109855889B
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Abstract
A multi-working condition tread braking unit fatigue test system comprises a front support frame, a rear support frame and a fixed seat which are arranged on a test platform, and a tread profiling module, a tangential force applying cylinder, a reciprocating vibration cam mechanism and a transverse force applying cylinder are further arranged; the invention provides tangential power by the tangential force applying cylinder, pushes the tread profiling module to swing, simulates the braking working condition in the wheel rotation process, provides transverse power by the transverse force applying cylinder, pushes the tread profiling module to transversely reciprocate, simulates the transverse movement of a wheel pair relative to a framework during braking, drives the tread profiling module to longitudinally reciprocate by the reciprocating vibration cam mechanism, and simulates the reciprocating vibration load caused by the tread to the tread braking unit in the wheel out-of-round braking process. The three different working condition tests can be independently carried out, can be carried out in a combined mode, and the test implementation of the combined working condition is not interfered with each other and is more similar to the use working condition of the existing vehicle.
Description
Technical Field
The invention relates to a fatigue test system for simulating the combined working condition of a current machine by a tread braking unit.
Background
Rolling stock, urban rail transit vehicles and part of rail engineering vehicles widely adopt tread braking modes. The tread braking unit provided by the invention is similar to the tread braking unit provided in the patent CN103693069B, and is an actuating device of a rail transit vehicle braking system. The braking mode is as follows: compressed air is filled into the brake, so that a brake head of the brake extends towards the wheel set to drive the outer cambered surface of the brake shoe to compress the wheel set, and friction force is generated. The friction force prevents the wheel set from continuing to rotate, thereby achieving a braking effect.
In order to verify the reliability and durability of the braking action of the tread braking units, it is necessary to perform a fatigue test on the tread braking units. However, in the existing fatigue test method, a tested tread braking unit is mounted on a test tool, a brake shoe extends to act on a tread profiling device, after a certain time, the tread braking unit is relieved, the brake shoe is retracted and reset, and then the above process is repeated continuously. In the above-mentioned conventional test method, the tread profiling device is completely fixed, i.e., static, so that it is impossible to verify the reliability and durability of the tread braking unit in the current running process of the vehicle, i.e., the influence of tangential force generated by friction between the tread of the wheel and the brake shoe, lateral force generated by lateral movement of the wheel set relative to the frame, periodic reciprocating vibration load generated by out-of-round wheels, etc. on the reliability and durability of the tread braking unit.
Even though the test stand invented by the patent CN105806611a and the test stand invented by the patent CN107063662a respectively and independently relate to the working condition simulation in which the transverse force exists and the working condition simulation in which the wheel is out of round, the test stand invented by the above patent has single simulation working condition, and can not truly simulate the combined working condition of the present vehicle. The tread profiling device and the transmission mechanism are integrated, so that the tread profiling device is single in type, cannot be suitable for various product fatigue test processes, and cannot meet the fatigue test requirements of the existing tread braking units.
Disclosure of Invention
The invention aims to provide a multi-working-condition tread braking unit fatigue test system which can simulate each independent working condition or combined working condition existing in the current car operation of the tread braking unit and verify the reliability and durability of the tread braking unit in the current car operation process.
In order to achieve the above purpose, the invention adopts the following technical scheme: the invention comprises a test platform, wherein a front support frame and a rear support frame are arranged on the test platform, a fixed seat is arranged at the side of the front support frame, and a tread profiling module, a tangential force applying cylinder, a reciprocating vibration cam mechanism and a transverse force applying cylinder are also arranged; the front support frame can transversely move, and a sliding frame capable of longitudinally moving is arranged in the front support frame; the rear supporting frame is provided with a lifting seat, and the lifting seat is provided with a bottom plate, two side plates and a rear side plate; the front side of the tread profiling module is hinged on the sliding frame through a hinge shaft, the rear end of the tread profiling module is inserted between two side plates of the lifting seat, and the tread profiling module is longitudinally and slidably connected with the lifting seat; the tangential force applying cylinder is positioned below the lifting seat and fixed on the test platform, and the lifting seat is driven to lift by the tangential force applying cylinder; the reciprocating vibration cam mechanism is provided with a motor and a cam, the cam is positioned behind the tread profiling module, the cam shaft is supported by two side plates of the lifting seat, the cam pushes the tread profiling module to move forwards, and the return spring drives the tread profiling module to return; the transverse force applying cylinder is arranged in the fixing seat and connected with the sliding frame, and the front supporting frame is driven to transversely move by the sliding frame.
The test system is also provided with a longitudinal adjusting device, the longitudinal adjusting device is positioned at the rear of the rear supporting frame, a movable piece of a first transmission mechanism of the longitudinal adjusting device is connected with a vertical plate of the rear supporting frame, and the rear supporting frame longitudinally moves under the action of the longitudinal adjusting device.
The tread profiling module comprises a front transmission rod, a rear transmission rod and a profiling tread head connected to the front transmission rod through screws, wherein the rear part of the front transmission rod is transversely loosely inserted into a U-shaped groove at the front end of the rear transmission rod.
The two side plates of the lifting seat are respectively provided with a longitudinal waist-shaped guide hole, the rear transmission rod of the tread profiling module is provided with a guide pin, and two ends of the guide pin are respectively inserted into the waist-shaped guide holes of the two side plates of the lifting seat to form longitudinal sliding connection.
The reciprocating vibration cam mechanism is provided with two return springs, the two return springs are respectively arranged on two sides of the tread profiling module, spring connecting rods are respectively arranged on two sides of a rear transmission rod of the tread profiling module, a fixing frame or a fixing column is arranged on the rear side of the front supporting frame, one end of each return spring is connected to the spring connecting rod on the same side, and the other end of each return spring is connected to the corresponding position of the fixing frame or the fixing column on the same side.
Four longitudinal guide posts are arranged in the front support frame in a pairwise manner, and the sliding frame is penetrated on the four longitudinal guide posts and can move on the longitudinal guide posts.
The piston rod end of the transverse force applying cylinder is provided with a joint, and the joint is hinged with the sliding frame through a pin shaft.
The transverse force applying cylinder can move longitudinally in the fixed seat by being driven by a third transmission mechanism, the third transmission mechanism comprises a screw rod and a movable block connected to the screw rod in a threaded mode, one end of the movable block is hinged to the cylinder body of the transverse power cylinder through a pin shaft, and the other end of the movable block is in movable fit with a guide rail on a side plate of the fixed seat.
And a fixture for installing the tread braking unit is fixed at the front side of the front support frame on the testing platform.
The longitudinal adjusting device is provided with a second transmission mechanism, a movable part of the second transmission mechanism is positioned right below a movable part of the first transmission mechanism, and the movable part of the second transmission mechanism is connected with a vertical plate of the rear supporting frame.
The invention has the following positive effects: 1. the invention can verify the influence of tangential force generated by friction between the tread and the brake shoe on the reliability and durability of the tread braking unit in the existing braking process of the vehicle; the influence of periodic reciprocating vibration load generated by out-of-round wheels on the reliability and durability of the tread braking unit can be verified; the influence of the transverse force generated by the transverse movement of the wheel set relative to the framework on the reliability and durability of the tread braking unit in the existing vehicle application process can be verified; the influence of the working conditions formed by the random combination of the three working conditions on the reliability and the durability of the tread braking unit can be verified, the working conditions are not interfered with each other, the working condition simulation is closer to the application of the existing vehicle, and the fatigue test time is shorter. 2. The invention can verify the influence of reliability and durability of the tread braking units suitable for different tread types, and is suitable for tread braking units with different mounting modes. 3. The invention has compact structure, the tread profiling module is of a split structure, the front transmission rod can transversely move in the U-shaped groove of the rear transmission rod, the tread profiling head can be conveniently replaced, different tread radiuses can be simulated, and fatigue tests of products with different tread types can be carried out.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
FIG. 2 is a perspective view of a tread profiling module.
FIG. 3 is a cross-sectional view of a tread profiling module.
Fig. 4 is a perspective view of a lateral force cylinder longitudinal adjustment device and a lateral force cylinder connection.
FIG. 5 is a perspective view of the tread profiling module connected to a longitudinal adjustment device and a reciprocating vibratory cam mechanism.
FIG. 6 is a plan view of the connection of the tread profiling module to the lateral force cylinder.
Fig. 7 is a perspective view of the connection of the tread profiling module to the reciprocating vibratory cam mechanism and tangential force applying cylinder.
FIG. 8 is a plan view of the connection of the tread profiling module to the reciprocating vibratory cam mechanism and tangential force applying cylinder
The reference numerals are as follows: the device comprises a front support frame 1, a longitudinal guide column 1-1, a sliding frame 2, a middle partition plate 2-1, a sliding groove 2-a, a cover plate 2-2, a tread profiling module 3, a profiling tread head 3-1, a front transmission rod 3-2, a rear transmission rod 3-3, a hinge shaft 3-4, a connecting pin 3-5, a spring connecting rod 3-6, a guide pin 3-7, a rear support frame 4, a lifting seat 5, a tangential force applying cylinder 6, a longitudinal adjusting device 7, a reciprocating vibration cam mechanism 8, a motor 8-1, a cam 8-2, a cam shaft 8-3, a return spring 8-4, a transverse force applying cylinder 9, a third transmission mechanism 10, a screw rod 10-1, a sliding block 10-2, a fixed seat 11, a fixed frame 12, a limiting frame 13, a tool 14, a test platform 15, a tangential force pulling and pressing sensor 16, a transverse force pulling and pressing sensor 17, a revolution sensor 18 and a displacement sensor 19.
Detailed Description
Example 1
Referring to fig. 1 to 8, the embodiment includes a test platform 15, a front support 1 and a rear support 4 disposed at the front and rear sides of the test platform 15, and a fixing seat 11 disposed beside the front support 1, and further includes a tread profiling module 3, a tangential force applying cylinder 6, a longitudinal adjusting device 7, a reciprocating vibration cam mechanism 8, and a transverse force applying cylinder 9.
A pair of transverse guide rails 15-1 are fixed to the front side of the test platform 15, and a pair of longitudinal guide rails 15-2 are fixed to the rear side.
The front support frame 1 is movably connected to the transverse guide rail 15-1 by a slider on the bottom surface. The front support frame 1 is internally provided with a sliding frame 2, four longitudinal guide posts 1-1 which are distributed pairwise are arranged in the front support frame 1, the sliding frame 2 is penetrated on the four longitudinal guide posts 1-1, and the sliding frame 2 can move on the longitudinal guide posts 1-1.
The rear supporting frame 4 is provided with a front sliding plate 4-1 and a vertical plate 4-2 which are connected in an angled mode, and the rear supporting frame 4 is movably connected to the longitudinal guide rail 15-2 by utilizing a sliding block on the bottom surface of the front sliding plate 4-1. A pair of lifting guide rails 4-3 are arranged on the front side surface of the vertical plate 4-2 of the rear supporting frame 4.
The lifting seat 5 is provided with a bottom plate 5-1, two side plates 5-2 and a rear side plate 5-3. The rear side plate 5-3 is movably connected to the lifting guide rail 4-3 of the rear support frame riser 4-2 by a sliding block on the rear side surface. The lifting seat 5 is connected with a measuring element of a displacement sensor 19 fixed on the front slide 4-1 of the rear support frame.
The longitudinal adjusting device 7 is positioned behind the rear supporting frame 4, and a movable part of the first transmission mechanism 7-1 of the longitudinal adjusting device 7 is connected with the vertical plate 4-2 of the rear supporting frame 4.
Referring to fig. 2 and 3, the tread profiling module 3 comprises a front transmission rod 3-2, a rear transmission rod 3-3 and a profiling tread head 3-1 obliquely connected to the front transmission rod 3-2 by a countersunk head screw, wherein a roller 3-8 is arranged at the rear end of the rear transmission rod 3-3. The rear part of the front transmission rod 3-2 is transversely loosely inserted into a U-shaped groove 3-a at the front end of the rear transmission rod 3-3, the front transmission rod 3-2 is connected with the rear transmission rod 3-3 through two connecting pins 3-5, the front transmission rod 3-2 is movably connected with the connecting pins 3-5, and the front transmission rod 3-2 can transversely move in the U-shaped groove 3-a along the connecting pins 3-5. The profiling tread head 3-1 is connected with the front transmission rod 3-2 in a concave-convex inserting mode, the surface to be attached is arc-shaped, mechanical positioning is formed, and the profiling tread head is fixed through countersunk head screw connection. The front transmission rod is connected with the profiling tread heads 3-1 with different arc radiuses, and the profiling tread heads 3-1 can be exchanged to be suitable for tests of tread braking units with different tread types and mounting modes.
Referring to fig. 6, the sliding frame 2 is provided with two middle partition plates 2-1, a longitudinal sliding groove 2-a is arranged between the two middle partition plates 2-1, and pin shaft holes are arranged on the two middle partition plates 2-1. The front transmission rod 3-2 of the tread profiling module 3 is provided with a hinge shaft hole, the front transmission rod 3-2 is positioned in the sliding groove 2-a of the sliding frame 2, the profiling tread head 3-1 extends out of the front supporting frame 1, deep groove ball bearings 20 are respectively arranged between the front transmission rod 3-2 and the two middle partition plates 2-1 of the sliding frame 2, a pair of thrust ball bearings 21 are arranged in the hinge shaft hole of the sliding frame 2, a hinge shaft 3-4 is supported by the four bearings, the tread profiling module 3 is hinged on the sliding frame 2 through the hinge shaft 3-4, and a cover plate 2-2 is connected to one side wall of the sliding frame 2 near the fixed seat 11.
Referring to fig. 6 to 8, the two side plates 5-2 of the lifting seat 5 are symmetrically provided with longitudinal kidney-shaped guide holes 5-2-1, the rear transmission rod 3-3 of the tread profiling module 3 is provided with guide pins 3-7, two ends of the guide pins 3-7 are respectively inserted into the kidney-shaped guide holes 5-2-1 of the two side plates 5-2 of the lifting seat, and the tread profiling module 3 is in longitudinal sliding connection with the lifting seat 5.
Referring to fig. 1 and 5 to 8, the reciprocating vibration cam mechanism 8 is provided with a motor 8-1, a cam 8-2 and two return springs 8-4 respectively arranged at two sides of the tread profiling module 3, the cam 8-2 is positioned at the rear of the tread profiling module 3, the cam shaft 8-3 is supported by two side plates 5-2 of the lifting seat 5, and the cam shaft 8-3 is connected with a revolution sensor 18. The cam 8-2 can be contacted with the roller 3-8 at the rear end of the tread profiling module 3. The two sides of the rear transmission rod 3-3 of the tread profiling module are respectively provided with a spring connecting rod 3-6, the rear side of the front support frame 1 is provided with a fixing frame 12 or a fixing column, one end of each return spring 8-4 is connected to the spring connecting rod 3-6 on the same side, and the other end is connected to the corresponding position of the fixing frame 12 or the fixing column on the same side.
Referring to fig. 1, 5, 7 and 8, the tangential force applying cylinder 6 is located below the lifting seat 5 and is fixed on the test platform 15, and a tangential force pulling and pressing sensor 16 is connected between the piston rod 6-1 of the tangential force applying cylinder and the bottom plate 5-1 of the lifting seat 5.
Referring to fig. 1,4 and 6, the lateral force applying cylinder 9 is arranged in the fixed seat 11, the piston rod end is provided with a joint 9-1, and a lateral force pulling and pressing sensor 17 is connected between the piston rod and the joint 9-1. The joint 9-1 is hinged with the cover plate 2-2 of the sliding frame 2 by a pin 9-2, and the transverse force applying cylinder 9 is driven by a third transmission mechanism 10 to longitudinally move in a fixed seat 11. The third transmission mechanism 10 comprises a screw rod 10-1 and a movable block 10-2 which is connected with the screw rod 10-1 in a threaded manner, a hand wheel 10-3 is connected to one end of the screw rod 10-1 extending out of the fixed seat 11, one end of the movable block 10-2 is hinged with a cylinder body of the transverse power cylinder 9 through a pin shaft 9-2, and the other end of the movable block 10-2 is in movable fit with a guide rail 11-1 on a side plate of the fixed seat 11.
And a limiting frame 13 is fixed on the test platform 15 and positioned outside the front supporting frame 1 and used for mechanical auxiliary limiting.
A fixture 14 for installing a tread braking unit is fixed on the testing platform 15 and positioned at the front side of the front supporting frame 1. The tool is provided with threaded holes with different interface sizes, and is suitable for mounting tread braking units in various mounting modes.
The test system has a visual system capable of realizing man-machine interaction, and can perform related functions such as starting-up self-checking, sensor calibration, manual debugging, functional test, test implementation, abnormal alarm and the like.
Example 2
The longitudinal adjusting device 7 is provided with a second transmission mechanism 7-2, a movable part of the second transmission mechanism 7-2 is positioned right below a movable part of the first transmission mechanism 7-1, and the movable part of the second transmission mechanism 7-2 is connected with the vertical plate 4-2 of the rear supporting frame 4. The two transmission mechanisms run synchronously. The remainder was the same as in example 1.
When the test system is used, the tread unit brake is arranged on the tool 14, the first transmission mechanism 7-1 and the second transmission mechanism 7-2 of the longitudinal adjusting device 7 are operated manually and synchronously, the rear supporting frame 4 is driven to move, so that the lifting seat 5 drives the tread profiling module 3 to move, the profiling tread head 3-1 is contacted with the tread unit brake, the sliding frame 2 also moves along with the tread profiling module 3, the transverse force applying cylinder 9 is hinged with the sliding frame 2, the transverse force applying cylinder 9 can deflect, the third transmission mechanism 10 is required to be operated, the screw rod 10-1 is rotated through the hand wheel 10-3, the sliding block 10-2 is driven to move on the screw rod 10-1, and the piston rod of the transverse force applying cylinder 9 is perpendicular to the cover plate 2-2 of the sliding frame 2.
The operation of the tangential force applying cylinder 6, the lateral force applying cylinder 9, and the reciprocating vibration cam mechanism 8 is controlled by an electrical control cabinet.
The stretching and restoring movement of the tangential force applying cylinder 6 drives the lifting seat 5 to move up and down, so as to drive the tread profiling module 3 to swing by taking the hinge shaft 3-4 as a fulcrum, and the lever principle is utilized to lengthen the arm of force, so that the tangential force is applied to the tread braking unit. The tangential force applying cylinder 6 provides tangential power to simulate braking conditions during wheel rotation.
The reciprocating vibration cam mechanism 8 runs, a motor 8-1 drives a cam 8-2 to rotate, the cam 8-2 pushes the tread profiling module 3 to move forwards through a roller 3-8 at the rear end of the tread profiling module 3, a guide pin 3-7 at the rear side of the tread profiling module 3 moves along kidney-shaped guide holes 5-2-1 on two side plates 5-2 of a lifting seat 5, the front part of the tread profiling module 3 is supported by a sliding frame 2, the sliding frame 2 moves along four longitudinal guide columns 1-1 on a front supporting frame 1, and a reset spring 8-4 drives the tread profiling module 3 to reset. The cam shaft 8-3 is supported by the two side plates 5-2 of the lifting seat 5, so that the whole reciprocating vibration cam mechanism 8 is fixed on the lifting seat 5, and can lift and fall along with the lifting seat 5, and tangential force application and reciprocating vibration load application are ensured not to interfere with each other. The reciprocating vibration cam mechanism 8 drives the tread profiling module 3 to longitudinally reciprocate, and simulates reciprocating vibration load caused by the tread to the tread braking unit in the braking process of the wheel out of round.
The extension and restoration movement of the transverse force application cylinder 9 drives the sliding frame 2 to move transversely, and then drives the tread profiling module 3 to move transversely, and because the tread profiling module 3 is of a split structure, the front transmission rod 3-2 can move transversely in the U-shaped groove 3-a of the rear transmission rod 3-3, so that only the front transmission rod 3-2 moves transversely with the profiling tread head 3-1, and the transverse force application and tangential force application are ensured not to interfere with each other. The two ends of the transverse force application cylinder 9 are connected with each related component in a pin shaft hinged mode, and the transverse force application cylinder has a displacement compensation function and ensures that the transverse force application and the reciprocating vibration load application do not interfere with each other. The lateral force applying cylinder 9 provides lateral power simulating lateral play of the wheel set relative to the frame during braking.
The three different working condition tests can be independently carried out, can be carried out in a combined mode, and the test implementation of the combined working condition is not interfered with each other and is more similar to the use working condition of the existing vehicle.
In the test process, related sensors acquire force signals in the process, data processing is carried out through an electrical control cabinet, and finally the force signals are displayed in a visual interface.
Claims (8)
1. Multiple working conditions tread brake unit fatigue test system, including test platform (15), its characterized in that: the testing platform (15) is provided with a front supporting frame (1) and a rear supporting frame (4), a fixed seat (11) is arranged at the side of the front supporting frame (1), and a tread profiling module (3), a tangential force applying cylinder (6), a reciprocating vibration cam mechanism (8) and a transverse force applying cylinder (9) are also arranged; the front support frame (1) can move transversely, and a sliding frame (2) capable of moving longitudinally is arranged in the front support frame; a lifting seat (5) is arranged on the rear supporting frame (4), and the lifting seat (5) is provided with a bottom plate (5-1), two side plates (5-2) and a rear side plate (5-3); the front side of the tread profiling module (3) is hinged on the sliding frame (2) through a hinge shaft (3-4), the rear end of the tread profiling module is inserted between two side plates (5-2) of the lifting seat (5), and the tread profiling module (3) is longitudinally and slidably connected with the lifting seat (5); the tangential force applying cylinder (6) is positioned below the lifting seat (5) and fixed on the test platform (15), and the lifting seat (5) is driven to lift by the tangential force applying cylinder (6); the reciprocating vibration cam mechanism (8) is provided with a motor (8-1) and a cam (8-2), the cam (8-2) is positioned behind the tread profiling module (3), the cam shaft (8-3) is supported by two side plates (5-2) of the lifting seat (5), the cam (8-2) pushes the tread profiling module (3) to move forwards, and the return spring (8-4) drives the tread profiling module (3) to return; the transverse force applying cylinder (9) is arranged in the fixed seat (11), the transverse force applying cylinder (9) is connected with the sliding frame (2), and the transverse force applying cylinder (9) drives the front supporting frame (1) to transversely move through the sliding frame (2); the tread profiling module (3) comprises a front transmission rod (3-2), a rear transmission rod (3-3) and a profiling tread head (3-1) connected to the front transmission rod (3-2) by screws, wherein the rear part of the front transmission rod (3-2) is transversely loosely inserted into a U-shaped groove (3-a) at the front end of the rear transmission rod (3-3);
Longitudinal kidney-shaped guide holes (5-2-1) are formed in the two side plates (5-2) of the lifting seat (5), guide pins (3-7) are arranged on the rear transmission rod (3-3) of the tread profiling module (3), and two ends of each guide pin (3-7) are inserted into the kidney-shaped guide holes (5-2-1) of the two side plates (5-2) of the lifting seat respectively to form longitudinal sliding connection;
The front transmission rod (3-2) is connected with the rear transmission rod (3-3) through two connecting pins (3-5), the front transmission rod (3-2) is movably connected with the connecting pins (3-5), and the front transmission rod (3-2) can transversely move in the U-shaped groove (3-a) along the connecting pins (3-5).
2. The multiple condition tread brake unit fatigue test system of claim 1, wherein: the multi-working-condition tread braking unit fatigue test system is characterized in that the multi-working-condition tread braking unit fatigue test system is further provided with a longitudinal adjusting device (7), the longitudinal adjusting device (7) is positioned behind the rear supporting frame (4), a movable part of a first transmission mechanism (7-1) of the longitudinal adjusting device (7) is connected with a vertical plate (4-2) of the rear supporting frame (4), and the rear supporting frame (4) longitudinally moves under the action of the longitudinal adjusting device (7).
3. The multiple condition tread brake unit fatigue test system of claim 1, wherein: the reciprocating vibration cam mechanism (8) is provided with two return springs (8-4), the two return springs (8-4) are respectively arranged on two sides of the tread profiling module (3), spring connecting rods (3-6) are respectively arranged on two sides of a rear transmission rod (3-3) of the tread profiling module, a fixing frame (12) or a fixing column is arranged on the rear side of the front supporting frame (1), one end of each return spring (8-4) is connected to the spring connecting rod (3-6) on the same side, and the other end of each return spring is connected to the corresponding position of the fixing frame (12) or the fixing column on the same side.
4. The multiple condition tread brake unit fatigue test system of claim 1, wherein: four longitudinal guide posts (1-1) distributed in pairs are arranged in the front support frame (1), and the sliding frame (2) is penetrated on the four longitudinal guide posts (1-1) and can move on the longitudinal guide posts (1-1).
5. The multiple condition tread brake unit fatigue test system of claim 1, wherein: the piston rod end of the transverse force applying cylinder (9) is provided with a joint (9-1), and the joint (9-1) is hinged with the sliding frame (2) through a pin shaft (9-2).
6. The multiple condition tread brake unit fatigue test system of claim 1, wherein: the transverse force applying cylinder (9) can longitudinally move in the fixed seat (11) by the driving of the third driving mechanism (10), the third driving mechanism (10) comprises a screw (10-1) and a movable block (10-2) which is connected to the screw (10-1) in a threaded mode, one end of the movable block (10-2) is hinged to a cylinder body of the transverse force applying cylinder (9) through a pin shaft (9-2), and the other end of the movable block (10-2) is in movable fit with a guide rail (11-1) on a side plate of the fixed seat (11).
7. The multiple condition tread brake unit fatigue test system of claim 1, wherein: and a tool (14) for installing the tread braking unit is fixed on the testing platform (15) and positioned at the front side of the front supporting frame (1).
8. The multiple condition tread brake unit fatigue test system of claim 2, wherein: the longitudinal adjusting device (7) is provided with a second transmission mechanism (7-2), a movable part of the second transmission mechanism (7-2) is positioned right below a movable part of the first transmission mechanism (7-1), and the movable part of the second transmission mechanism (7-2) is connected with a vertical plate (4-2) of the rear supporting frame (4).
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| CN201711235727.8A CN109855889B (en) | 2017-11-30 | 2017-11-30 | Fatigue test system for multi-working-condition tread braking unit |
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| CN201711235727.8A CN109855889B (en) | 2017-11-30 | 2017-11-30 | Fatigue test system for multi-working-condition tread braking unit |
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| CN109855889B true CN109855889B (en) | 2024-04-30 |
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| CN110441070B (en) * | 2019-08-13 | 2020-12-22 | 中车青岛四方车辆研究所有限公司 | Fatigue test system for brake shoe support cross sliding type tread foundation brake device |
| CN110487569A (en) * | 2019-08-26 | 2019-11-22 | 中国铁道科学研究院集团有限公司 | The full-automatic testing device and method of tread braking unit |
| CN110487568A (en) * | 2019-08-26 | 2019-11-22 | 中国铁道科学研究院集团有限公司 | Tread braking unit test device and method |
| CN112229656A (en) * | 2020-11-09 | 2021-01-15 | 西南交通大学 | Vertical and horizontal decoupling's of bogie frame loading device |
| CN113267356B (en) * | 2021-06-25 | 2024-05-03 | 中国铁道科学研究院集团有限公司 | Multi-working-condition reliability test stand for brake |
| CN114414272B (en) * | 2022-01-26 | 2023-09-12 | 华东交通大学 | Train wheel tread braking simulation test device |
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