Anti-roll bar torsion rod modular test device and anti-roll bar torsion rod loading test method

Abstract

The anti-roll torsion bar modular test device is installed on a test platform, and characterized in that it comprises a mounting module for mounting the anti-roll torsion bar, a static load module for applying static load to a connecting rod at one end of the anti-roll torsion bar, and a loading module for applying dynamic load to a connecting rod at the other end of the anti-roll torsion bar, the mounting module is composed of two support seat positioning modules respectively matched with support seats of the anti-roll torsion bar, one support seat positioning module is located directly below the loading module, and the other support seat positioning module is located directly below the static load module, and the matching position of the support seat on the support seat positioning module is adjustable. The application satisfies the matching of anti-roll torsion bars of various specifications, realizes the modularization and standardization of the test device, achieves the test assembly of the anti-roll torsion bars of various specifications by a single test device, reduces the test cost, can intuitively master the stress condition and mechanical properties of the anti-roll torsion bar during the loading process, and improves the operability of the fatigue test.

Description

Modular testing apparatus for anti-roll torsion bar and loading test method for anti-roll torsion bar Technical Field

[0001] This invention relates to a modular testing device for anti-roll torsion bars and a method for anti-roll torsion bar loading tests, belonging to the technical field of anti-roll torsion bar loading tests. Background Technology

[0002] The anti-roll torsion bar system is a component connecting the bogie and the car body. It is a key component installed on the bogie of rail transit vehicles, mainly used to suppress car body roll during cornering, crosswinds, and other conditions. Existing anti-roll torsion bar systems for rail transit typically consist of three parts: a torsion bar assembly, a connecting rod assembly, and a support assembly. The torsion bar assembly is fixed to the frame via the support assembly and to the car body via the connecting rod assembly. When roll occurs between the car body and the frame, the anti-roll torsion bar prevents the increase of the car body's roll angle relative to the frame, thereby suppressing vehicle roll and improving lateral stability. Before use, the performance of the anti-roll torsion bar must be tested, especially its stiffness and fatigue performance. In recent years, the specifications and models of anti-roll torsion bars have been continuously increasing, and each type of anti-roll torsion bar requires test design based on different customer requirements. The current traditional test design involves designing dedicated tooling for each model of anti-roll torsion bar, which has the advantage of quick and convenient installation but the disadvantages of high testing costs and large storage space requirements. For example, the connection between the support and the frame in anti-roll torsion bars is divided into two types: two-hole connection and four-hole connection. Two-hole connections are further differentiated by varying center distances between the two holes, while four-hole connections are differentiated by varying longitudinal and transverse center distances among the four holes. With the long-term accumulation of research and development tests on anti-roll torsion bars for various vehicle models, traditional design methods and testing tooling storage spaces can no longer meet the requirements of the ever-increasing number of research and development projects. Therefore, modular and standardized design of testing equipment has become an urgent problem to be solved. Summary of the Invention

[0003] The modular testing device and loading test method for anti-roll torsion bars provided by this invention are designed to meet the assembly requirements of anti-roll torsion bars of various specifications. The testing device is modularized and standardized, enabling a single testing device to test and assemble anti-roll torsion bars of multiple specifications, reducing testing costs, and allowing for a direct understanding of the stress and mechanical properties of the anti-roll torsion bars during loading, thereby improving the operability of fatigue testing.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A modular testing device for anti-roll torsion bars, mounted on a test platform, is characterized by comprising: an installation module for mounting the anti-roll torsion bar, a constant load module for applying a static load to the connecting rod at one end of the anti-roll torsion bar, and a loading module for applying a dynamic load to the connecting rod at the other end of the anti-roll torsion bar. The installation module consists of two support seat positioning modules, each fitted with a support seat of the anti-roll torsion bar. One support seat positioning module is located directly below the loading module, and the other support seat positioning module is located directly below the constant load module. The mounting position of the support seat on the support seat positioning module is adjustable.

[0006] Preferably, the number of installation modules is two, and the two installation modules are symmetrically distributed around the loading module.

[0007] Preferably, the support positioning module includes a fixing plate that mates with the strip groove on the test platform. There are two fixing plates arranged in parallel. The fixing plates have oblong holes corresponding to the mounting bolts on the support. The lower end of the mounting bolt extends into the oblong hole. Adjusting the position of the mounting bolt extending into the oblong hole adjusts the mounting position of the support on the support positioning module.

[0008] Preferably, the support base positioning module further includes a crossbeam limiting component. The crossbeam limiting component includes a positioning crossbeam located above the support base and abutting against the upper end of the mounting bolt, a positioning vertical bar fixed to the positioning crossbeam and abutting against the side of the support base, and a clamping screw that passes through the positioning crossbeam and abuts against the test platform. The clamping screw is located at both ends of the positioning crossbeam, and a clamping nut is fitted on the clamping screw. The clamping nut is clamped onto the top surface of the positioning crossbeam.

[0009] Preferably, the loading assembly includes a gantry bracket fixed on the test platform, a guide beam mounted on the gantry bracket, a vertical cylinder mounted on the gantry bracket, a guide column coaxially connected to the vertical cylinder and guidingly connected through the guide beam, a pressure plate fixed to the bottom end of the guide column, and a pressing assembly one fixed to the bottom of the pressure plate and abutting against the spindle of the ball joint at the end of the connecting rod.

[0010] Preferably, the pressing component includes a pressing disc fixed to the bottom of the pressure plate and a pressing block mounted on the pressing disc and abutting against the end of the mandrel. The pressing disc has four U-shaped holes arranged radially from the edge inwards and evenly distributed along the circumference of the pressing disc. The upper end of the pressing block is connected to the U-shaped holes and can be moved and adjusted along the U-shaped holes.

[0011] Preferably, the wall of the U-shaped hole has a radially arranged guide groove, and the pressure block extends into the guide groove.

[0012] Preferably, the vertical cylinder and the guide column are coaxially connected with an upper load sensor, and the top surface of the lower pressure disc is equipped with a lower load sensor that contacts the bottom surface of the pressure plate.

[0013] Preferably, the load-fixing module includes a four-column load-fixing frame mounted on the test platform and spanning the support base positioning module, a load-fixing plate mounted on the four-column load-fixing frame, and a second pressing component fixed to the bottom of the load-fixing plate and abutting against the spindle of the ball joint at the end of the connecting rod. The second pressing component has the same structure as the first pressing component. Each of the four columns in the four-column load-fixing frame is threaded with a positioning nut for positioning the load-fixing plate.

[0014] The method for testing anti-roll torsion bar under load, using the modular anti-roll torsion bar testing device described above, is characterized by including the following steps:

[0015] S1: Adjust the mounting position of the support on the support positioning module according to the distance between the support seats at both ends of the anti-roll torsion bar;

[0016] S2: Based on the static load of the connection between the connecting rod at one end of the anti-roll torsion bar and the vehicle body, apply a static load to the connecting rod at one end of the anti-roll torsion bar using a constant load module.

[0017] S3: Based on the dynamic changes in load caused by anti-roll after the connecting rod at the other end of the anti-roll torsion bar is connected to the vehicle body, a loading module is used to apply dynamic load to the connecting rod at the other end of the anti-roll torsion bar in order to test the fatigue performance of the anti-roll torsion bar.

[0018] The beneficial effects of this invention are:

[0019] 1. In the modular test of the anti-roll torsion bar of the present invention, the support seat positioning module is assembled with the support seat of the anti-roll torsion bar. The loading module dynamically loads one end of the connecting rod of the anti-roll torsion bar, and the constant load module statically loads the other end of the connecting rod of the anti-roll torsion bar, simulating the load-bearing state of the anti-roll torsion bar under anti-roll conditions, and conducting fatigue tests on the anti-roll torsion bar. The mounting position of the support seat on the support seat positioning module is adjustable. The position of the support seat on the support seat positioning module can be adjusted according to the length of the anti-roll torsion bar and the number of mounting holes of the support seat on the frame, so as to meet the assembly of anti-roll torsion bars of various specifications. The test device is modularized and standardized, realizing the test assembly of multiple specifications of anti-roll torsion bars with a single test device, reducing the test cost.

[0020] 2. The bottom of the fixing plate extends into the strip groove of the test platform for positioning. The fixing plate mates with different strip grooves, allowing adjustment of the distance between the two fixing plates to accommodate varying lateral (perpendicular to the strip groove) spacing of the mounting bolts on the support base. The oblong holes accommodate varying longitudinal (along the strip groove) spacing of the four rectangularly distributed mounting bolts. Furthermore, the mounting position of the support base on the fixing plate is adjusted along the oblong holes, thus accommodating the mounting requirements of support bases for anti-roll torsion bars of different lengths and meeting the mounting requirements of various specifications of anti-roll torsion bars. The intermediate pressure block of the lower pressure assembly can be adjusted on the lower pressure disc to accommodate different lengths of the mandrel of the ball joint at the end of the connecting rod, thus accommodating the loading requirements of various specifications of anti-roll torsion bars.

[0021] 3. The upper load sensor reflects the applied load of the vertical cylinder in real time to control the dynamic change of the load. The lower load sensor senses the reaction force of the connecting rod acting on the lower pressure disk due to the elastic deformation of the anti-roll torsion bar during dynamic loading, so as to understand the change of the anti-roll torsion bar load. By comparing the values ​​sensed by the upper load sensor and the lower load sensor, the stress and mechanical properties of the anti-roll torsion bar during loading can be intuitively understood, thus improving the operability of fatigue testing. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the modular test setup for anti-roll torsion bar.

[0023] Figure 2 is a partially enlarged schematic diagram of Figure 1.

[0024] Figure 3 is a partially enlarged schematic diagram of Figure 2.

[0025] Figure 4 is another enlarged view of a portion of Figure 1. Detailed Implementation

[0026] The embodiments of the present invention will be described in detail below with reference to Figures 1-4.

[0027] A modular testing device for anti-roll torsion bar, mounted on a test platform, is characterized by comprising: an installation module 1 for mounting the anti-roll torsion bar, a constant load module 2 for applying a static load to the connecting rod at one end of the anti-roll torsion bar, and a loading module 3 for applying a dynamic load to the connecting rod at the other end of the anti-roll torsion bar. The installation module 1 consists of two support seat positioning modules 4, each fitted with a support seat of the anti-roll torsion bar. One support seat positioning module 4 is located directly below the loading module 3, and the other support seat positioning module is located directly below the constant load module 2. The mounting position of the support seat on the support seat positioning module 4 is adjustable.

[0028] In the modular test of the anti-roll torsion bar described above, the support positioning module 4 is fitted with the support base 101 of the anti-roll torsion bar 100. The loading module 3 dynamically loads one end of the connecting rod 102 of the anti-roll torsion bar 100, and the constant load module 2 statically loads the other end of the connecting rod 102 of the anti-roll torsion bar 100 to simulate the load-bearing state of the anti-roll torsion bar 100 under anti-roll conditions and to conduct fatigue tests on the anti-roll torsion bar 100. The fitting position of the support base 101 on the support positioning module 4 is adjustable. The position of the support base 101 on the support positioning module 4 can be adjusted according to the length of the anti-roll torsion bar 100 and the number of mounting holes of the support base on the frame to meet the fitting of anti-roll torsion bars of various specifications. The test device is modularized and standardized, realizing the test assembly of multiple specifications of anti-roll torsion bars with a single test device, reducing the test cost.

[0029] The installation module 1 consists of two units, symmetrically distributed around the loading module 3. A single loading module 3 simultaneously applies dynamic loading to the anti-roll torsion bars on both installation modules 1, enabling a comparative synchronous test of the two anti-roll torsion bars. This improves upon the current fatigue test of a single anti-roll torsion bar by replacing it with a synchronous test of two anti-roll torsion bars, thus increasing test efficiency.

[0030] The support positioning module 4 includes a fixing plate 41 that is positioned and engaged with the strip groove on the test platform. There are two fixing plates 41, and the two fixing plates 41 are arranged in parallel. The fixing plate 41 has a waist-shaped hole 42 that corresponds to the mounting bolt 103 on the support 101. The lower end of the mounting bolt 103 extends into the waist-shaped hole 42. The position of the mounting bolt 103 extending into the waist-shaped hole 42 is adjusted to adjust the mounting position of the support 101 on the support positioning module 4. The support base 101 generally has two mounting bolts 103 that mate with two mounting holes on the frame, or four mounting bolts 103 arranged in a rectangular pattern that mate with four mounting holes on the frame. As can be seen from the attached drawing, multiple strip grooves A are evenly distributed on the test platform. The bottom of the fixing plate 41 extends into the strip groove for positioning. The fixing plate 41 mates with different strip grooves A, and the distance between the two fixing plates 41 can be adjusted to meet the different requirements of the lateral (direction perpendicular to the strip groove A) spacing of the mounting bolts 103 on the support base. The setting of the waist-shaped hole 42 meets the different requirements of the longitudinal (direction along the strip groove A) spacing of the four rectangularly distributed mounting bolts 103, and the mounting position of the support base 101 on the fixing plate 41 can be adjusted along the waist-shaped hole 42, thereby adapting to the mounting requirements of support bases for anti-roll torsion bars of different lengths and meeting the mounting requirements of anti-roll torsion bars of various specifications.

[0031] The support positioning module 4 further includes a crossbeam limiting component 43. The crossbeam limiting component 43 includes a positioning crossbeam 431 located above the support 101 and abutting against the upper end of the mounting bolt 103; a positioning vertical bar 432 fixed to the positioning crossbeam 431 and abutting against the side of the support 101; and a clamping screw 433 penetrating the positioning crossbeam 431 and abutting against the test platform. The clamping screw 433 is located at both ends of the positioning crossbeam 431, and a clamping nut 434 is fitted on the clamping screw 433, pressing against the top surface of the positioning crossbeam 431. The crossbeam limiting component 4 is used to limit the shaking of the support 101 when the loading module 3 loads one end of the connecting rod 102, preventing the support 101 from overturning laterally during the loading test, ensuring the positioning stability of the support 101 during the test, avoiding fatigue test failure due to overturning of the support 101 during loading, and improving the reliability and stability of the test.

[0032] The loading assembly 3 includes a gantry bracket 31 fixed on the test platform, a guide beam 32 mounted on the gantry bracket 31, a vertical cylinder 33 mounted on the gantry bracket 21, a guide post 34 coaxially connected to the vertical cylinder 33 and guidingly connected through the guide beam 32, a pressure plate 35 fixed to the bottom of the guide post 34, and a pressing assembly 36 fixed to the bottom of the pressure plate 35 and abutting against the spindle of the ball joint at the end of the connecting rod 102. The vertical cylinder 33 applies a dynamic load and presses down on the spindle 104 of the ball joint at the end of the connecting rod 102 through the guide post 34, the pressure plate 35, and the pressing assembly 36, thereby causing the connecting rod to bear vertical load. As can be seen from the attached figure, two pressing assemblies 36 are fixed on the pressure plate 35. Each pressing assembly 36 applies vertical pressure to one end of the connecting rod of an anti-roll torsion bar, forming a synchronous fatigue test on the two anti-roll torsion bars.

[0033] The pressing assembly 36 includes a pressing disc 5 fixed to the bottom of the pressure plate 35, and a pressing block 6 mounted on the pressing disc 5 and abutting against the end of the spindle 104. Four U-shaped holes 51 are radially arranged from the edge inwards on the pressing disc 5, evenly distributed around its circumference. The upper end of the pressing block 6 is connected to the U-shaped holes 51 and can be moved along the U-shaped holes 51 to adjust its position. The pressing block 6 can be adjusted on the pressing disc 5 to accommodate different lengths of the spindle 104 of the ball joint at the end of the connecting rod 102, thus meeting the loading requirements of various specifications of anti-roll torsion bars.

[0034] The U-shaped hole 51 has a radially arranged guide groove 511 on its wall, and the pressure block 6 extends into the guide groove 511. The pressure block 6 moves and adjusts its position along the guide groove 511, and at the same time, the cooperation between the guide groove 511 and the pressure block 6 also positions the pressure block 6 on the lower pressure disc 5. The pressure block 6 can be adjusted along the guide groove 511, and as the lower pressure disc 5 presses down, it presses down the spindle 104, causing the connecting rod to press down. The installation structure of the pressure plate 6 on the lower pressure disc 5 is simple and easy to adjust its position.

[0035] The vertical cylinder 33 and guide column 34 are coaxially connected with an upper load sensor 7, and a lower load sensor 8 is mounted on the top surface of the lower pressure disc 5, which contacts the bottom surface of the pressure plate 35. The upper load sensor 7 reflects the applied load of the vertical cylinder 33 in real time to control the dynamic change of the load. The lower load sensor 8 senses the reaction force of the connecting rod 103 acting on the lower pressure disc 5 due to the elastic deformation of the anti-roll torsion bar during dynamic loading, so as to grasp the change of the load on the anti-roll torsion bar. By comparing the values ​​sensed by the upper load sensor 8 and the lower load sensor 8, the stress and mechanical properties of the anti-roll torsion bar during loading can be intuitively grasped, improving the operability of fatigue testing.

[0036] The load-fixing module 2 includes a four-column load-fixing frame 9 mounted on the test platform and spanning the support positioning module 4, a load-fixing plate 10 mounted on the four-column load-fixing frame 9, and a pressing component 2 11 fixed to the bottom of the load-fixing plate 10 and abutting against the spindle 104 at the end of the connecting rod 102. The pressing component 2 has the same structure as the pressing component 1 36. Each of the four columns 91 in the four-column load-fixing frame 9 is threaded with a positioning nut 92 for positioning the load-fixing plate 10. The four-column load frame 9 is placed on the test platform, and the load plate 10 is threaded through the four columns 91. The positioning nut 92 cooperates with the columns 91 to position the height of the load plate 10 on the four-column load frame 9. The load plate 10 is subjected to static load through the pressing component 2 11 and the spindle 104. The height of the load plate 100 on the four-column load frame 9 can be adjusted to adjust the magnitude of the static load to meet the different static loading requirements of the connecting rod at one end of the anti-roll torsion bar during the test.

[0037] The method for testing anti-roll torsion bar under load, using the modular anti-roll torsion bar testing device described above, is characterized by including the following steps:

[0038] S1: Adjust the mounting position of support seat 101 on support seat positioning module 4 according to the distance between the support seats at both ends of the anti-roll torsion bar;

[0039] S2: Based on the static load of the connection 102 at one end of the anti-roll torsion bar to the vehicle body, the fixed load module 2 applies a static load to the connection 102 at one end of the anti-roll torsion bar.

[0040] S3: Based on the dynamic changes in load caused by anti-roll after the connecting rod 102 at the other end of the anti-roll torsion bar is connected to the vehicle body, the loading module 3 applies a dynamic load to the connecting rod at the other end of the anti-roll torsion bar to detect the fatigue performance of the anti-roll torsion bar.

[0041] The above-described anti-roll torsion bar loading test method uses loading module 3 to dynamically load one end of the anti-roll torsion bar 100 connecting rod 102, and fixed load module 2 to statically load the other end of the anti-roll torsion bar 100 connecting rod 102, simulating the load-bearing state of the anti-roll torsion bar 100 under anti-roll conditions, and conducting fatigue tests on the anti-roll torsion bar 100. The mounting position of the support seat 101 on the support seat positioning module 4 is adjustable. The position of the support seat 101 on the support seat positioning module 4 can be adjusted according to the length of the anti-roll torsion bar 100 and the number of mounting holes of the support seat on the frame, so as to meet the assembly of anti-roll torsion bars of various specifications, realize the test assembly of multiple specifications of anti-roll torsion bars with a single test device, and reduce the test cost.

[0042] The technical solutions of the embodiments of the present invention have been fully described above with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A modular testing device for anti-roll torsion bar, mounted on a testing platform, characterized in that: The system includes an installation module for mounting an anti-roll torsion bar, a constant load module for applying a static load to the connecting rod at one end of the anti-roll torsion bar, and a loading module for applying a dynamic load to the connecting rod at the other end of the anti-roll torsion bar. The installation module consists of two support seat positioning modules, each fitted with a support seat for the anti-roll torsion bar. One support seat positioning module is located directly below the loading module, and the other is located directly below the constant load module. The mounting position of the support seat on the support seat positioning module is adjustable. Each support seat positioning module includes two fixing plates that engage with a slot on the test platform. The fixed plates are arranged in parallel, and the fixed plates have oblong holes corresponding to the mounting bolts on the support base. The lower end of the mounting bolt extends into the oblong hole. Adjusting the position of the mounting bolt in the oblong hole adjusts the mounting position of the support base on the support base positioning module. The support base positioning module also includes a crossbeam limiting assembly, which includes a positioning crossbeam located above the support base and abutting against the upper end of the mounting bolt, a positioning vertical bar fixed to the positioning crossbeam and abutting against the side of the support base, and a clamping screw that passes through the positioning crossbeam and abuts against the test platform. The clamping screw is located at both ends of the positioning crossbeam, and a clamping nut is fitted on the clamping screw. The nut is tightened onto the top surface of the positioning beam; the loading module includes a gantry bracket fixed to the test platform, a guide beam mounted on the gantry bracket, a vertical cylinder mounted on the gantry bracket, a guide column coaxially connected to the vertical cylinder and guidingly connected through the guide beam, a pressure plate fixed to the bottom end of the guide column, and a pressing assembly one fixed to the bottom of the pressure plate and abutting against the mandrel at the end of the connecting rod; the pressing assembly one includes a pressing disc fixed to the bottom of the pressure plate, a pressure block mounted on the pressing disc and abutting against the end of the mandrel, and U-shaped holes radially arranged from the edge inward on the pressing disc, the number of U-shaped holes... There are four pressure blocks evenly distributed around the circumference of the pressure disc. The upper end of the pressure block is connected to a U-shaped hole and can be moved and adjusted along the U-shaped hole. The wall of the U-shaped hole has a radially arranged guide groove, and the pressure block is inserted into the guide groove. The fixed load module includes a four-column fixed load frame mounted on the test platform and spanning the support base positioning module, a fixed load plate mounted on the four-column fixed load frame, and a second pressure component fixed to the bottom of the fixed load plate and abutting against the spindle of the ball joint at the end of the connecting rod. The second pressure component has the same structure as the first pressure component. Each of the four columns of the four-column fixed load frame is threaded with a positioning nut for positioning the fixed load plate.

2. The modular testing device for anti-roll torsion bar according to claim 1, characterized in that: The number of installation modules is two, and the two installation modules are symmetrically distributed around the loading module.

3. The modular testing device for anti-roll torsion bar according to claim 1, characterized in that: The vertical cylinder and the guide column are coaxially connected with an upper load sensor, and the top surface of the lower pressure disc is equipped with a lower load sensor that contacts the bottom surface of the pressure plate.

4. A method for testing anti-roll torsion bar under load, wherein the test is conducted using the modular anti-roll torsion bar testing apparatus as described in any one of claims 1 to 3, characterized in that, Includes the following steps: S1: Adjust the mounting position of the support seats on the support seat positioning module according to the distance between the support seats at both ends of the anti-roll torsion bar; S2: Apply a static load to the connecting rod at one end of the anti-roll torsion bar using the fixed load module based on the static installation load of the connecting rod at one end of the anti-roll torsion bar connected to the vehicle body; S3: Apply a dynamic load to the connecting rod at the other end of the anti-roll torsion bar using the loading module based on the dynamic change of the load formed by anti-roll after the connecting rod at the other end of the anti-roll torsion bar is connected to the vehicle body, in order to test the fatigue performance of the anti-roll torsion bar.

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