New tread braking unit dynamic fatigue test device and test method

Abstract

The present invention discloses a new type of dynamic fatigue test device for a tread braking unit, which includes a base table. At one longitudinal end of the base table, there is a vertical module mechanism, and at the other longitudinal end, there are a frictional torque module mechanism, a lateral module mechanism, and a rotation module mechanism. The vertical module mechanism realizes the dynamic fatigue test of the tangential force load on the tread braking unit body, the frictional torque module mechanism realizes the dynamic fatigue test of the frictional force load on the tread braking unit body, the lateral module mechanism realizes the dynamic fatigue test of the lateral force load on the tread braking unit body, and the rotation module mechanism realizes the dynamic fatigue test of the simulated rotational force load on the tread braking unit body. By adopting this technical solution, it is possible to meet the fatigue test process under various actual working condition environmental conditions, so as to obtain more accurate fatigue test data results, and more truly verify the reliability and durability of the tread braking unit under various actual working condition environmental conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of fatigue testing of tread brake units, and particularly to a new type of dynamic fatigue test device and test method for tread brake units. Background Art

[0002] The tread brake unit is an important part of the basic braking device of rail transit vehicles. The tread brake unit needs to have functions such as braking, releasing, and brake shoe clearance adjustment, and can operate normally under different actual working conditions and environments, and can also maintain the reliability and durability of the tread brake unit. Therefore, comprehensive and stringent performance tests need to be carried out on the tread brake unit to make it meet the working requirements.

[0003] In the prior art, such as the patent "A Tread Brake Unit Test Bench" with the publication number CN112964487B, this application is to connect the measuring mechanism with the tread brake unit, so that when the tread brake unit operates, its performance can be tested through the corresponding measuring components, solving the problem that the test bench cannot meet the test requirements of the tread brake unit under high and low temperature conditions; however, the test bench of this invention simulates a single working condition, and the dynamic fatigue of the tread brake unit only conducts tests on braking and releasing actions, and the measured parameters only include air pressure and force values. The measured parameters and conditions are single, and they cannot reflect the situation of the tread brake unit under actual working conditions, and cannot be applied to the fatigue test process under various actual working conditions and environments, so it cannot meet the existing fatigue test requirements of the tread brake unit. Summary of the Invention

[0004] The purpose of the present invention is to provide a new type of dynamic fatigue test device for tread brake units, which is used to solve the problem that the tread brake unit in the prior art cannot be applied to the fatigue test requirements under various actual working conditions and environments.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A new type of dynamic fatigue test device for tread brake units includes a base table. A vertical module mechanism is arranged at one longitudinal end of the base table, and a frictional torque module mechanism, a transverse module mechanism, and a rotation module mechanism are arranged at the other longitudinal end.

[0007] The tread brake unit body is fixedly installed on the vertical module mechanism. The vertical module mechanism drives the tread brake unit body to make vertical contact with the simulation wheel, so as to realize the dynamic fatigue test of the tangential force load of the tread brake unit body.

[0008] The friction torque module mechanism is provided with a simulation wheel adapted to the tread braking unit body, and the friction torque module mechanism is fixedly installed on the lateral mounting seat included in the lateral module mechanism. The simulation wheel is driven by the friction torque module mechanism to make braking friction contact with the tread braking unit body, so as to realize the dynamic fatigue test of the friction force load of the tread braking unit body;

[0009] The lateral mounting seat is slidably connected to the lateral positioning seat included in the lateral module mechanism. The simulation wheel is driven by the lateral module mechanism to make lateral contact with the tread braking unit body, so as to realize the dynamic fatigue test of the lateral force load of the tread braking unit body;

[0010] The rotation module mechanism is arranged below the lateral module mechanism and is rotatably connected to the lateral mounting seat. The simulation wheel is driven by the rotation module mechanism to make rotational contact with the tread braking unit body, so as to realize the dynamic fatigue test of the simulated rotational force load of the tread braking unit body.

[0011] As a further scheme of the present invention: the tread braking unit body is fixedly installed on the vertical mounting seat included in the vertical module mechanism. The vertical mounting seat is slidably connected to the vertical loading seat through a vertical guide rail assembly. The vertical loading seat is fixedly installed on the base table, and the bottom of the vertical mounting seat is pin-connected to the telescopic end of a vertical servo electric cylinder.

[0012] As a further scheme of the present invention: a vertical scale is arranged on the end face of the vertical loading seat, and the vertical scale is used to record the vertical test height of the tread braking unit body.

[0013] As a further scheme of the present invention: the swing servo electric cylinder included in the friction torque module mechanism is fixedly installed on the torque mounting seat. The torque mounting seat is fixedly installed on the side end face of the lateral mounting seat. The telescopic end of the swing servo electric cylinder is pin-connected to one end of a swing rod. The simulation wheel is arranged at the pin-connected end of the swing rod. The swing rod is rotatably connected to a swing support. The swing support is fixedly installed on the top end face of the lateral mounting seat, and a swing hole for avoiding the up-and-down swinging action of the swing rod is arranged on the swing support.

[0014] As a further scheme of the present invention: when the swing servo electric cylinder is fixedly installed on the torque mounting seat, integral structure trunnions are respectively arranged on both sides of the swing servo electric cylinder. Copper sleeves are sleeved and connected on the trunnions. The copper sleeves are detachably connected to the mounting holes arranged on the torque mounting seat. An end cover of the trunnion is arranged on the side end face of the trunnion, and the end cover of the trunnion is used to resist and limit the lateral movement of the trunnion.

[0015] As a further solution of the present invention: when the swing rod is rotatably connected to the swing support, a swing rod rotating shaft is integrally formed on the swing rod, the swing rod rotating shaft is rotatably connected in a rotating shaft hole formed on the swing support, and both ends of the swing rod rotating shaft are respectively rotatably connected to the swing support through double-row angular contact bearings. A rotating shaft end cover is detachably connected to the side wall of the swing support, and the rotating shaft end cover is used to resist and limit the lateral movement of the swing rod rotating shaft.

[0016] As a further solution of the present invention: the lateral servo cylinder included in the lateral module mechanism is fixedly installed on the lateral positioning seat, the telescopic end of the lateral servo cylinder is pin-connected to one end of the lateral mounting seat, and the lateral mounting seat is slidably connected to the lateral positioning seat through a lateral guide rail assembly.

[0017] As a further solution of the present invention: the rotating module mechanism includes a rotating servo motor fixedly installed on the base table, the driving end of the rotating servo motor is drivingly connected to a slewing bearing, the slewing bearing is rotatably connected to the base table, and the slewing bearing is fixedly connected to the lateral positioning seat. Support blocks in contact with the base table are provided at the four corner positions of the lateral positioning seat, the support blocks are detachably connected to the base table through pin rods, and the pin rods are slidably installed in arc-shaped sliding holes formed on the lateral positioning seat.

[0018] The test method using the new tread brake unit dynamic fatigue test device as described above includes the following steps:

[0019] Set the inflation and exhaust action frequency and number of the tread brake unit body through the control system;

[0020] Control the operation of the vertical module mechanism through the control system to adjust the vertical relative position between the tread brake unit body and the simulation wheel, so as to realize the dynamic fatigue test of the tangential force load of the tread brake unit body;

[0021] Control the operation of the frictional torque module mechanism through the control system to adjust the relative position of the braking friction contact surface between the tread brake unit body and the simulation wheel, so as to realize the dynamic fatigue test of the frictional force load of the tread brake unit body;

[0022] Control the operation of the lateral module mechanism through the control system to adjust the lateral relative position between the tread brake unit body and the simulation wheel, so as to realize the dynamic fatigue test of the lateral force load of the tread brake unit body;

[0023] Control the operation of the rotating module mechanism through the control system to adjust the relative position of the rotational contact surface direction between the tread brake unit body and the simulation wheel, so as to realize the dynamic fatigue test of the simulated rotational force load of the tread brake unit body;

[0024] Set the action time of the above working condition mechanism, the single action time of the fatigue test, the total number of cycles, and record the number of cycles of the current fatigue through the control system.

[0025] As a further solution of the present invention: the control system can separately control the vertical module mechanism, the frictional torque module mechanism, the horizontal module mechanism, and the rotation module mechanism, or combine the control of multiple working condition mechanisms in a linkage manner.

[0026] The novel dynamic fatigue test device and test method for the tread braking unit of the present invention have at least the following

[0027] Beneficial effects:

[0028] (1) By arranging the vertical module mechanism, the frictional torque module mechanism, the horizontal module mechanism, and the rotation module mechanism on the base table, the fatigue test process under various actual working condition environments can be satisfied, so as to obtain more accurate fatigue test data results, and more truly verify the reliability and durability of the tread braking unit under various actual working condition environments;

[0029] (2) The vertical module mechanism, the frictional torque module mechanism, the horizontal module mechanism, and the rotation module mechanism can separately act for dynamic fatigue tests, or multiple working condition mechanisms can be combined in a linkage manner for dynamic fatigue tests, and can more accurately simulate the working condition environment during the actual operation of the tread braking unit body;

[0030] (3) The various working condition mechanisms on the base table can realize four-degree-of-freedom (vertical, horizontal, frictional torque, rotation) loading of the tread braking unit body for dynamic fatigue tests, can truly simulate the relative position relationship between the tread braking unit body and the simulation wheel, and comprehensively detect the key physical quantities during the dynamic fatigue process of the tread braking unit. Brief description of the drawings

[0031] The present invention will be further described below with reference to the drawings.

[0032] Figure 1 is the structural schematic diagram of the present invention;

[0033] Figure 2 is the schematic diagram of the vertical module mechanism arranged at one longitudinal end of the base of the present invention;

[0034] Figure 3 is Figure 2 the structural schematic diagram of the tread braking unit body installed on the vertical module mechanism in

[0035] Figure 4 is Figure 2 the structural schematic diagram of the vertical module mechanism in

[0036] Figure 5 Yes Figure 2 Schematic diagram of a vertical force sensor arranged at the telescopic end of a vertical servo cylinder in

[0037] Figure 6 Schematic diagram of a friction torque module mechanism, a lateral module mechanism, and a rotation module mechanism arranged at the other longitudinal end of the base of the present invention

[0038] Figure 7 Yes Figure 6 Schematic diagram of a lateral structure of an integrated assembly of a friction torque module mechanism, a lateral module mechanism, and a rotation module mechanism in

[0039] Figure 8 Yes Figure 6 Schematic diagram of the other lateral structure of an integrated assembly of a friction torque module mechanism, a lateral module mechanism, and a rotation module mechanism in

[0040] Figure 9 Yes Figure 6 Schematic diagram of the structure of a friction torque module mechanism in

[0041] Figure 10 Yes Figure 6 Schematic diagram of the split structure of a swing rod and a swing support in

[0042] Figure 11 Yes Figure 6 Schematic diagram of the split structure of a swing servo cylinder and a torque mounting seat in

[0043] Figure 12 Yes Figure 8 Schematic diagram of a lateral force sensor arranged at the telescopic end of a lateral servo cylinder in

[0044] Figure 13 Yes Figure 6 Schematic diagram of the structure of a rotation module mechanism in the upward viewing direction in

[0045] Figure 14 Figure 6 Schematic diagram of the structure of a rotation module mechanism in the downward viewing direction in

[0046] Figure 15 Flow chart of the test steps of the present invention

[0047] In the figure:

[0048] 1. Base table

[0049] 2. Vertical module mechanism; 20. Vertical mounting seat; 21. Vertical loading seat; 22. Vertical guide rail assembly; 23. Vertical servo cylinder; 24. Vertical floating lower joint; 25. Vertical floating upper joint; 26. Vertical force sensor; 27. Vertical scale

[0050] 3. Frictional torque module mechanism; 30. Simulation wheel; 31. Swing rod; 310. Swing rod rotating shaft; 311. Double row angular contact bearing; 312. Rotating shaft end cover; 32. Swing support; 320. Swing hole; 321. Rotating shaft hole; 33. Swing floating upper joint; 34. Swing floating lower joint; 35. Swing servo electric cylinder; 350. Trunnion; 36. Torque mounting seat; 360. Mounting hole; 37. Swing force sensor; 38. Trunnion end cover; 39. Bronze bushing;

[0051] 4. Transverse module mechanism; 40. Transverse mounting seat; 41. Transverse guide rail assembly; 42. Transverse positioning seat; 420. Arc-shaped sliding hole; 43. Transverse servo electric cylinder; 44. Transverse floating front joint; 45. Transverse floating rear joint; 46. Transverse force sensor;

[0052] 5. Rotary module mechanism; 50. Rotary servo motor; 51. Slewing bearing; 52. Support block; 53. Pin rod;

[0053] 6. Tread braking unit body. Detailed implementation manners

[0054] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0055] In the description of the present invention, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention; in the description of the present invention, the meanings of "a plurality" and "several" are at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0056] Please refer to Figure 1 As shown, the present invention is a new type of tread braking unit dynamic fatigue test device, including a base table 1. A vertical module mechanism 2 is provided at one longitudinal end of the base table 1, and a frictional torque module mechanism 3, a transverse module mechanism 4, and a rotary module mechanism 5 are provided at the other longitudinal end. By arranging the vertical module mechanism 2, the frictional torque module mechanism 3, the transverse module mechanism 4, and the rotary module mechanism 5 on the base table 1, the fatigue test process under various actual working condition environments can be satisfied, so as to obtain more accurate fatigue test data results, and more truly verify the reliability and durability of the tread braking unit under various actual working condition environments.

[0057] The tread braking unit body 6 is fixedly installed on the vertical module mechanism 2. The vertical module mechanism 2 drives the tread braking unit body 6 to make vertical contact with the simulation wheel 30, so as to realize the dynamic fatigue test of the tangential force load on the tread braking unit body 6.

[0058] The friction torque module mechanism 3 is provided with a simulation wheel 30 adapted to the tread braking unit body 6, and the friction torque module mechanism 3 is fixedly installed on the horizontal mounting seat 40 included in the horizontal module mechanism 4. The friction torque module mechanism 3 drives the simulation wheel 30 to make braking friction contact with the tread braking unit body 6, so as to realize the dynamic fatigue test of the friction force load on the tread braking unit body 6.

[0059] The horizontal mounting seat 40 is slidably connected to the horizontal positioning seat 42 included in the horizontal module mechanism 4. The horizontal module mechanism 4 drives the simulation wheel 30 to make horizontal contact with the tread braking unit body 6, so as to realize the dynamic fatigue test of the horizontal force load on the tread braking unit body 6.

[0060] The rotation module mechanism 5 is arranged below the horizontal module mechanism 4 and is rotatably connected to the horizontal mounting seat 40. The rotation module mechanism 5 drives the simulation wheel 30 to make rotational contact with the tread braking unit body 6, so as to realize the dynamic fatigue test of the simulated rotational force load on the tread braking unit body 6.

[0061] During the operation and application of the dynamic fatigue test device of the present application, the vertical module mechanism 2 can drive the tread braking unit body 6 to rise and fall to adjust the vertical relative position between the tread braking unit body 6 and the simulation wheel 30, so as to realize the dynamic fatigue test of the tangential force load on the tread braking unit body 6; the friction torque module mechanism 3 can drive the simulation wheel 30 to make cyclic braking friction contact with the tread braking unit body 6 to adjust the relative position of the braking friction contact surface between the tread braking unit body 6 and the simulation wheel 30, so as to realize the dynamic fatigue test of the friction force load on the tread braking unit body 6; the horizontal module mechanism 4 can drive the simulation wheel 30 to move horizontally to adjust the horizontal relative position between the tread braking unit body 6 and the simulation wheel 30, so as to realize the dynamic fatigue test of the horizontal force load on the tread braking unit body 6; the rotation module mechanism 5 can drive the simulation wheel 30 to rotate to adjust the relative position of the rotational contact surface direction between the tread braking unit body 6 and the simulation wheel 30, so as to realize the dynamic fatigue test of the simulated rotational force load on the tread braking unit body 6.

[0062] During the operation and application of the dynamic fatigue test device of the present application, the vertical module mechanism 2, the frictional torque module mechanism 3, the horizontal module mechanism 4, and the rotation module mechanism 5 can separately perform dynamic fatigue tests, or can perform combined dynamic fatigue tests under various working conditions, and can more accurately simulate the working condition environment during the actual operation of the tread braking unit 6.

[0063] During the operation and application of the dynamic fatigue test device of the present application, various working condition mechanisms on the base table 1 can perform dynamic fatigue tests on the tread braking unit 6 with four degrees of freedom (vertical, horizontal, frictional torque, rotation) loading, and can truly simulate the relative position relationship between the tread braking unit 6 and the simulation wheel 30, so as to meet the fatigue test process under various actual working condition environments, facilitate obtaining more accurate fatigue test data results, and can more truly verify the reliability and durability of the tread braking unit under various actual working condition environments.

[0064] How to implement the dynamic fatigue test of the tangential force load on the tread braking unit 6 will be elaborated in detail below.

[0065] In this specific embodiment, as Figures 2 to 5 shown, the vertical module mechanism 2 includes a vertical mounting seat 20 on which the tread braking unit 6 is fixedly installed. The vertical mounting seat 20 is slidably connected to the vertical loading seat 21 through a vertical guide rail assembly 22. The vertical loading seat 21 is fixedly installed on the base table 1, and the telescopic end of a vertical servo electric cylinder 23 is pin-connected to the bottom of the vertical mounting seat 20. During the process of implementing the dynamic fatigue test of the tangential force load on the tread braking unit 6, the vertical servo electric cylinder 23 drives the vertical mounting seat 20 to move up and down along the vertical loading seat 21, so that the tread braking unit 6 can move up and down, thereby adjusting the vertical relative position between the tread braking unit 6 and the simulation wheel 30 to achieve the dynamic fatigue test of the tread braking unit 6 with vertical degree of freedom loading.

[0066] In this specific embodiment, as Figure 2 shown, a vertical scale 27 is provided on the end face of the vertical loading seat 21. The vertical scale 27 is used to record the vertical test height of the tread braking unit 6, and can quickly and intuitively record the operation and use.

[0067] It should be understood that, as Figure 4 shown, when the telescopic end of the vertical servo electric cylinder 23 is pin-connected to the bottom of the vertical mounting seat 20, a vertical floating lower joint 24 is provided at the telescopic end of the vertical servo electric cylinder 23, and a vertical floating upper joint 25 is provided at the bottom of the vertical mounting seat 20. The vertical floating upper joint 25 and the vertical floating lower joint 24 are pin-connected through a pin shaft to facilitate the assembly and installation of the vertical mounting seat 20 on the telescopic end of the vertical servo electric cylinder 23.

[0068] It should be understood that, as Figure 2 shown, when the vertical mounting base 20 is slidably connected to the vertical loading base 21 through the vertical guide rail assembly 22, the guide rail assembly is composed of a guide rail bar and a slider adapted thereto to ensure the stability of the up-and-down test movement between the vertical mounting base 20 and the vertical loading base 21.

[0069] It should be understood that, as Figure 5 shown, a vertical force sensor 26 is installed between the vertical floating upper joint 25 and the vertical mounting base 20, so as to facilitate the real-time acquisition of the tangential force data of the tread braking unit body 6 through the vertical force sensor 26, which is convenient for recording and analysis.

[0070] How to implement the dynamic fatigue test of the frictional force load of the tread braking unit body 6 will be elaborated in detail below.

[0071] In this specific embodiment, as Figures 7 to 11 shown, the swing servo cylinder 35 included in the frictional torque module mechanism 3 is fixedly installed on the torque mounting base 36, and the torque mounting base 36 is fixedly installed on the side end surface of the horizontal mounting base 40. The telescopic end of the swing servo cylinder 35 is pin-connected to one end of the swing rod 31. The simulation wheel 30 is arranged at the pin-connected end of the swing rod 31. The swing rod 31 is rotatably connected to the swing support 32. The swing support 32 is fixedly installed on the top end surface of the horizontal mounting base 40, and a swing hole 320 for avoiding the up-and-down swing movement of the swing rod 31 is provided on the swing support 32. During the process of implementing the dynamic fatigue test of the frictional force load of the tread braking unit body 6, the swing servo cylinder 35 drives the swing rod 31 to move up and down along the swing support 32, so that the simulation wheel 30 on the swing rod 31 can swing cyclically, so that the simulation wheel 30 can perform simulated braking on the tread braking unit body 6, so as to adjust the relative position of the braking friction contact surface between the tread braking unit body 6 and the simulation wheel 30, so as to realize the dynamic fatigue test of the tread braking unit body 6 with the freedom of the frictional torque direction loaded.

[0072] In this specific embodiment, as Figure 11As shown in the figure, when the swing servo cylinder 35 is fixedly installed on the torque mounting seat 36, trunnions 350 with an integral structure are respectively arranged on both sides of the swing servo cylinder 35. A connecting bronze bushing 39 is sleeved on the trunnions 350, and the bronze bushing 39 is detachably connected in the mounting hole 360 opened on the torque mounting seat 36. An end cover 38 of the trunnion is arranged on the side end face of the trunnion 350, and the end cover 38 of the trunnion is used to resist and limit the lateral movement of the trunnion 350; so that it is convenient to install the swing servo cylinder 35 on the torque mounting seat 36. When the friction torque module mechanism 3, the lateral module mechanism 4, and the rotation module mechanism 5 are linked to conduct a fatigue test, it is necessary to ensure that there is a certain degree of freedom in the installation of the torque mounting seat 36 and the swing servo cylinder 35 to avoid damaging the swing servo cylinder 35 during the linkage process. The deformation amount generated by the calculation simulation wheel 30 during joint debugging can be calculated, and then the gap between the trunnion 350 on the swing servo cylinder 35 and the bronze bushing 39 can be controlled. When the gap is greater than the deformation amount, the influence on the swing servo cylinder 35 during linkage can be eliminated.

[0073] In this specific embodiment, as Figure 10 shown, when the swing rod 31 is rotatably connected to the swing support 32, a swing rod rotating shaft 310 with an integral structure is arranged on the swing rod 31. The swing rod rotating shaft 310 is rotatably connected in the rotating shaft hole 321 opened on the swing support 32, and both ends of the swing rod rotating shaft 310 are respectively rotatably connected to the swing support 32 through double-row angular contact bearings 311. A rotating shaft end cover 312 is detachably connected to the side wall of the swing support 32, and the rotating shaft end cover 312 is used to resist and limit the lateral movement of the swing rod rotating shaft 310; Using the lever principle, the front end of the swing rod 31 is driven by the servo cylinder, and the swing rod 31 moves up and down along the swing support 32 to drive the simulation wheel 30 to perform friction torque simulation loading.

[0074] It should be understood that, as Figure 9 shown, when the bottom of the swing rod 31 is pin-connected to the telescopic end of the swing servo cylinder 35, a swing floating lower joint 34 is arranged at the telescopic end of the swing servo cylinder 35, and a swing floating upper joint 33 is arranged at the bottom of the swing rod 31. The swing floating upper joint 33 and the swing floating lower joint 34 are pin-connected through a pin shaft, so as to facilitate the assembly and installation of the swing rod 31 at the telescopic end of the vertical servo cylinder 23, so that the simulation wheel 30 performs braking loading on the tread braking unit body 6.

[0075] It should be understood that, as Figure 9 shown, a swing force sensor 37 is installed between the swing floating upper joint 33 and the swing rod 31, so as to facilitate the real-time acquisition and measurement of the braking friction force data of the tread braking unit body 6 through the swing force sensor 37, which is convenient for recording and analysis.

[0076] How to implement the dynamic fatigue test of the lateral force load on the tread braking unit body 6 will be elaborated in detail below.

[0077] In this specific embodiment, as Figure 7 , Figure 8 and Figure 12 shown, the lateral module mechanism 4 includes a lateral servo cylinder 43 fixedly installed on a lateral positioning seat 42. The telescopic end of the lateral servo cylinder 43 is pin-connected to one end of a lateral mounting seat 40. The lateral mounting seat 40 is slidably connected to the lateral positioning seat 42 through a lateral guide rail assembly 41. During the dynamic fatigue test of the lateral force load of the tread braking unit body 6, the lateral servo cylinder 43 drives the lateral mounting seat 40 to move laterally along the lateral positioning seat 42, so that the simulation wheel 30 can move laterally, thereby adjusting the lateral relative position between the tread braking unit body 6 and the simulation wheel 30 to achieve the dynamic fatigue test of the tread braking unit body 6 with lateral degree of freedom loading.

[0078] It should be understood that, as Figure 8 and Figure 12 shown, when the telescopic end of the lateral servo cylinder 43 is pin-connected to one end of the lateral mounting seat 40, a lateral floating front joint 44 is provided at the telescopic end of the lateral servo cylinder 43, and a lateral floating rear joint 45 is provided at one end of the lateral mounting seat 40. The lateral floating rear joint 45 and the lateral floating front joint 44 are pin-connected through a pin shaft to facilitate the assembly and installation of the lateral mounting seat 40 at the telescopic end of the lateral servo cylinder 43.

[0079] It should be understood that, as Figure 8 shown, when the lateral mounting seat 40 is slidably connected to the lateral positioning seat 42 through a vertical guide rail assembly 22, the guide rail assembly is composed of a guide rail strip and a slider adapted thereto to ensure the stability of the lateral test action between the lateral mounting seat 40 and the lateral positioning seat 42.

[0080] It should be understood that, as Figure 12 shown, a lateral force sensor 46 is provided at the tail end of the lateral mounting seat 40 to facilitate the real-time acquisition and measurement of the lateral force data of the tread braking unit body 6 through the lateral force sensor 46, which is convenient for recording and analysis.

[0081] How to implement the dynamic fatigue test of the simulated rotational force load of the tread braking unit body 6 will be elaborated in detail below.

[0082] In this specific embodiment, as Figure 7 , Figure 8 and Figures 13 to 14As shown, the rotary module mechanism 5 includes a rotary servo motor 50 which is fixedly mounted on the base platform 1, and the driving end of the rotary servo motor 50 is transmission-connected to the slewing support 51, and the slewing support 51 is rotatably connected to the base platform 1, and the slewing support 51 is fixedly connected to the transverse positioning seat 42, and the four corners of the transverse positioning seat 42 are provided with support blocks 52 which are in contact with the base platform 1, and the support blocks 52 are detachably connected to the base platform 1 through a pin rod 53, and the pin rod 53 is slidably mounted in an arc-shaped sliding hole 420 provided on the transverse positioning seat 42; During the dynamic fatigue test of the tread brake unit 6 simulating the rotational force load, the slewing support 51 is driven to rotate along the base 1 by rotating the servo motor 50. At this time, the locking connection between the pin 53 and the support block 52 and the base 1 is released, so that the pin 53 can rotate along the arc-shaped sliding hole 420, so that the simulated wheel 30 can rotate, thereby adjusting the relative position of the rotational contact surface direction between the tread brake unit 6 and the simulated wheel 30, so as to realize the rotational freedom loading of the tread brake unit 6 for dynamic fatigue test.

[0083] It should be understood that, during the static fatigue test, the pin 53 securely connects the support block 52 to the base platform 1 to limit the rotation of the lateral positioning seat 42, thereby realizing the static fatigue test of the tread brake unit 6 under various working conditions.

[0084] Combination Figure 15 As shown, the present invention also provides a test method using the novel tread brake unit dynamic fatigue test device as described above, comprising the following steps:

[0085] The frequency and number of times of the inflation and exhaust actions of the tread brake unit 6 are set by a control system.

[0086] The vertical module mechanism 2 is controlled by the control system to adjust the vertical relative position between the tread brake unit 6 and the simulation wheel 30, so as to realize the dynamic fatigue test of the tangential force load of the tread brake unit 6.

[0087] The control system controls the operation of the friction torque module mechanism 3 to adjust the relative position of the braking friction contact surface between the tread brake unit 6 and the simulated wheel 30 to achieve a dynamic fatigue test of the friction load of the tread brake unit 6.

[0088] The control system controls the operation of the lateral module mechanism 4 to adjust the lateral relative position between the tread brake unit 6 and the simulated wheel 30 , thereby realizing a dynamic fatigue test of the lateral force load of the tread brake unit 6 .

[0089] The control system is used to control the operation of the rotary module mechanism 5 to adjust the relative position of the rotational contact surface direction between the tread brake unit body 6 and the simulation wheel 30, so as to realize the dynamic fatigue test of the simulated rotational force load of the tread brake unit body 6.

[0090] The control system sets the action time of the above-mentioned working condition mechanism, the single action time of the fatigue test, the total number of cycles, and records the current fatigue cycle number.

[0091] The control system can independently control the vertical module mechanism 2, the friction torque module mechanism 3, the lateral module mechanism 4 and the rotary module mechanism 5, or combine the control of multiple working condition mechanisms in a linkage manner.

[0092] In the process of adopting this method, by controlling the charging and discharging action frequency and number of the tread brake unit body 6, the tread brake unit body 6 contacts the simulation wheel 30, and the contact braking pressure is loaded. Under the action of the vertical module mechanism 2, the friction torque module mechanism 3, the lateral module mechanism 4 and the rotary module mechanism 5, various working conditions are applied to the tread brake unit body 6 and the simulation wheel 30 according to the test requirements, so as to realize the dynamic fatigue test of the tread brake unit body 6 with four degrees of freedom (vertical, lateral, friction torque, rotation). The relative position relationship between the tread brake unit body 6 and the simulation wheel 30 can be truly simulated, so as to meet the fatigue test process under various actual working condition environment conditions, facilitate obtaining more accurate fatigue test data results, and more truly verify the reliability and durability of the tread brake under various actual working condition environment conditions.

[0093] The above has described a specific embodiment of the present invention in detail, but the described content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the present invention application should still fall within the scope covered by the patent of the present invention.

Claims

1. A new type of tread brake unit dynamic fatigue test device, characterized in that: The base platform (1) comprises a vertical module mechanism (2) at one longitudinal end of the base platform (1), and a friction torque module mechanism (3), a transverse module mechanism (4) and a rotation module mechanism (5) at the other longitudinal end; A tread brake unit (6) is fixedly mounted on the vertical module mechanism (2), and the tread brake unit (6) is driven by the vertical module mechanism (2) to make vertical contact with the simulation wheel (30), thereby realizing a dynamic fatigue test of the tangential force load of the tread brake unit (6); The friction torque module mechanism (3) is provided with a simulation wheel (30) adapted to the tread brake unit body (6), and the friction torque module mechanism (3) is fixedly mounted on a transverse mounting seat (40) included in the transverse module mechanism (4), and the friction torque module mechanism (3) drives the simulation wheel (30) to perform braking friction contact with the tread brake unit body (6), thereby realizing a dynamic fatigue test of the friction load of the tread brake unit body (6); The lateral positioning seat (42) included in the lateral module mechanism (4) is slidably connected to the lateral mounting seat (40), and the lateral module mechanism (4) drives the simulation wheel (30) to make lateral contact with the tread brake unit (6), thereby realizing a dynamic fatigue test of the lateral force load of the tread brake unit (6); The rotating module mechanism (5) is arranged below the transverse module mechanism (4) and is rotationally connected to the transverse mounting seat (40). The rotating module mechanism (5) drives the simulation wheel (30) to rotate with the tread brake unit body (6), thereby realizing a dynamic fatigue test of the tread brake unit body (6) simulating a rotational force load; The rotary module mechanism (5) includes a rotary servo motor (50) fixedly mounted on the base platform (1); a driving end of the rotary servo motor (50) is transmission-connected to a slewing support (51); the slewing support (51) is rotatably connected to the base platform (1); and the slewing support (51) is fixedly connected to the transverse positioning seat (42); support blocks (52) in contact with the base platform (1) are provided at the four corners of the transverse positioning seat (42); the support blocks (52) are detachably connected to the base platform (1) via a pin rod (53); and the pin rod (53) is slidably mounted in an arc-shaped sliding hole (420) provided on the transverse positioning seat (42).

2. The new tread brake unit dynamic fatigue test device according to claim 1 is characterized in that: The vertical module mechanism (2) includes a vertical mounting seat (20) on which the tread brake unit body (6) is fixedly mounted. The vertical mounting seat (20) is slidably connected to a vertical loading seat (21) via a vertical guide rail assembly (22). The vertical loading seat (21) is fixedly mounted on the base platform (1). The bottom of the vertical mounting seat (20) is pin-connected to the telescopic end of a vertical servo electric cylinder (23).

3. The new tread brake unit dynamic fatigue test device according to claim 2 is characterized in that: A vertical scale (27) is arranged on the end surface of the vertical loading seat (21), and the vertical scale (27) is used to record the vertical test height of the tread brake unit (6).

4. The novel tread brake unit dynamic fatigue test device according to claim 1 is characterized in that: The friction torque module mechanism (3) includes a swing servo electric cylinder (35) fixedly mounted on a torque mounting seat (36), the torque mounting seat (36) fixedly mounted on the side end surface of the transverse mounting seat (40), the telescopic end of the swing servo electric cylinder (35) is pin-connected to one end of a swing rod (31), the simulation wheel (30) is arranged at the pin-connected end of the swing rod (31), the swing rod (31) is rotatably connected to a swing support (32), the swing support (32) is fixedly mounted on the top end surface of the transverse mounting seat (40), and a swing hole (320) is provided on the swing support (32) to avoid the swing rod (31) from swinging up and down.

5. The novel tread brake unit dynamic fatigue test device according to claim 4 is characterized in that: When the swing servo electric cylinder (35) is fixedly mounted on the torque mounting seat (36), two sides of the swing servo electric cylinder (35) are respectively provided with ear shafts (350) of an integral structure, a connecting copper sleeve (39) is sleeved on the ear shaft (350), and the copper sleeve (39) is detachably connected to a mounting hole (360) provided on the torque mounting seat (36), and an ear shaft end cover (38) is provided on the side end surface of the ear shaft (350), and the ear shaft end cover (38) is used to resist and limit the lateral movement of the ear shaft (350).

6. The novel tread brake unit dynamic fatigue test device according to claim 4 is characterized in that: When the swing arm (31) is rotatably connected to the swing support (32), a swing arm rotating shaft (310) is integrally provided on the swing arm (31), and the swing arm rotating shaft (310) is rotatably connected to a rotating shaft hole (321) provided on the swing support (32), and both ends of the swing arm rotating shaft (310) are rotatably connected to the swing support (32) via double-row angular contact bearings (311), and a rotating shaft end cover (312) is detachably connected to the side wall of the swing support (32), and the rotating shaft end cover (312) is used to resist and limit the lateral movement of the swing arm rotating shaft (310).

7. The novel tread brake unit dynamic fatigue test device according to claim 1 is characterized in that: The transverse module mechanism (4) includes a transverse servo electric cylinder (43) which is fixedly mounted on a transverse positioning seat (42); a telescopic end of the transverse servo electric cylinder (43) is pin-connected to one end of a transverse mounting seat (40); and the transverse mounting seat (40) is slidably connected to the transverse positioning seat (42) via a transverse guide rail assembly (41).

8. The test method using the new tread brake unit dynamic fatigue test device as claimed in claim 1 is characterized in that: The following steps are involved: The frequency and number of times of the inflation and exhaust actions of the tread brake unit (6) are set by a program through a control system; The vertical module mechanism (2) is controlled by a control system to adjust the vertical relative position between the tread brake unit (6) and the simulation wheel (30), thereby realizing a dynamic fatigue test of the tangential force load of the tread brake unit (6); The control system controls the operation of the friction torque module mechanism (3) to adjust the relative position of the braking friction contact surface between the tread brake unit body (6) and the simulation wheel (30), thereby realizing a dynamic fatigue test of the friction load of the tread brake unit body (6); The control system controls the operation of the transverse module mechanism (4) to adjust the transverse relative position between the tread brake unit (6) and the simulation wheel (30) to achieve a dynamic fatigue test of the transverse force load of the tread brake unit (6); The control system controls the operation of the rotating module mechanism (5) to adjust the relative position of the rotational contact surface between the tread brake unit body (6) and the simulation wheel (30), thereby realizing a dynamic fatigue test of the tread brake unit body (6) simulating the rotational force load; The control system is used to set the action time of the working mechanism, the single action time of the fatigue test, the total number of cycles, and the number of cycles of the current fatigue.

9. The test method according to claim 8, characterized in that The control system can independently control the vertical module mechanism (2), the friction torque module mechanism (3), the lateral module mechanism (4) and the rotation module mechanism (5) or control multiple working mode mechanisms in a coordinated manner.

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