A four-bar linkage mechanism rotation fatigue test device and method

Abstract

A four-bar linkage traction mechanism rotation fatigue test device and method, the four-bar linkage traction mechanism includes left anti-tilt rod assembly and right anti-tilt rod assembly, and the fatigue test device includes a rotating platform, a bottom platform and an oil cylinder, the bottom of the rotating platform is fixed on the bottom platform, one end of the inner side of the rotating platform is hinged to one end of the left anti-tilt rod assembly, and the other end of the inner side of the rotating platform is hinged to one end of the right anti-tilt rod assembly; one end of the oil cylinder is hinged to one end of the outer side of the rotating platform, so that the oil cylinder can drive the rotating platform and the traction mechanism to rotate when the oil cylinder is extended or retracted. The present application can directly measure the fatigue performance of the four-bar linkage traction mechanism under the system loading condition, and also can obtain the stress test data of the key bearing parts during the system loading test, thereby providing important design reference for product development, and avoiding the long cycle and high risk of the on-vehicle test mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail transit, in particular to a test device and test method for a traction component of a rail vehicle. BACKGROUND

[0002] Monorail transportation originated in the 1960s, and several monorail transportation operation lines have been built in Tokyo, Osaka, Tama, Okinawa, etc. in Japan. Compared with ordinary subway vehicles, monorail vehicles have the advantages of strong climbing ability, small turning radius, low running noise, good landscape, etc., and are particularly suitable for specific conditions such as high mountains and steep slopes, winding roads, and complex terrain. In the famous mountain city of Chongqing, the school field to the new village line is a high-speed monorail line, which is also the first monorail transportation line in China. In addition, Hangzhou, Dongguan and Shijiazhuang have also conducted research on the adaptability of monorail transportation systems to the city's public transportation system. Monorail transportation, as a kind of urban public transportation system, has attracted much attention at home and abroad. The traction mechanism is a key traction component of the monorail vehicle bogie, and its performance must be detected before use to ensure the safety and comfort of the vehicle.

[0003] Compared with the single-pull rod traction device, the double-pull rod center traction device and the plate pin type center traction device commonly used in traditional rail vehicles, the monorail vehicle traction mechanism is a four-bar linkage plus anti-roll torsion bar traction system, which has a more complex structure and a unique load bearing. The entire system mainly consists of a four-bar linkage traction mechanism, a torsion shaft, a mounting seat, a torsion arm, a traction connecting rod and an oil spring, and its main function is to transmit the traction force of the monorail vehicle body relative to the bogie and to alleviate the centrifugal force and eccentric displacement generated when the vehicle passes through a curve, and it has the advantages of good damping effect and convenient maintenance, so it has been widely used in monorail vehicle bogie systems. In order to test the performance of the traction mechanism, the domestic test laboratory has also designed a traction mechanism fatigue test scheme in the early stage, but the scheme has a complex structure, is inconvenient to operate and has a high test cost, so it is necessary to design a new type of rotation fatigue test scheme to meet the test requirements and conduct rotation fatigue test on the traction mechanism, which not only verifies the reliability of the entire system, but also facilitates the verification of whether abnormal noise is generated during the movement of the entire mechanism. The successful implementation of the present application fills the gap in this technical field and provides a test method and device for the fatigue test of the four-bar linkage traction mechanism.

[0004] The following patent is found to be similar to the present invention through retrieval: the invention named "a three-way coordinated loading test method and device for a torsion bar system" is analyzed and compared with the present patent: the three-way coordinated loading test method and device for a torsion bar system is mainly for vertical bidirectional and horizontal common three-way fatigue test of the anti-roll torsion bar of the bogie of a railway vehicle, the loading mode and principle mainly adopt two vertical loading cylinders to respectively apply a pair of force couples with equal size and opposite direction to the connecting rods at both ends of the anti-roll torsion bar to form a roll load, and a horizontal loading oil is used to apply horizontal positive and negative push-pull displacement to simulate the lateral load of the vehicle to perform three-way coordinated loading test on the anti-roll torsion bar. The similarity is that the test is performed by the force loading mode of the oil cylinder.

[0005] The device and method for combined loading test of rubber elastic elements of a railway vehicle are analyzed and compared with the present patent: the device for combined loading test of rubber elastic elements of a railway vehicle mainly performs vertical, horizontal and longitudinal three-way compression and shear composite fatigue test on pressure-shear type rubber spring products, and in the specific structure implementation, two separate four-column frame systems are used to respectively apply horizontal and longitudinal loads, and the similarity is that the test is performed by a separate frame system.

[0006] Since the anti-roll torsion bar is installed in the secondary suspension system of the railway vehicle, its structure and load bearing principle are completely different from those of the four-bar linkage traction mechanism, which is mainly installed between the vehicle body and the bogie of a monorail vehicle, and this connection mode exists in the form of horizontal installation, which is completely different from the vertical installation mode of the anti-roll torsion bar. Although they both transmit the traction force of the vehicle body relative to the bogie, there are great differences in working principle and structure implementation. The present patent is a new test scheme developed to solve the problem that the existing technology cannot meet the system fatigue test of the four-bar linkage traction mechanism. By fixing one end of the traction mechanism to simulate the bogie device and fixing the other end to the simulated vehicle body device, a new horizontal horizontal independent frame is designed to install a horizontal loading oil push platform to form an eccentric rotating torque to perform fatigue test on the traction mechanism, thereby achieving the purpose of reducing cost and increasing efficiency. Therefore, the present patent is a completely new technical scheme.

[0007] Compared with the device for combined loading test of rubber elastic elements of a railway vehicle, although the test device adopts two different structures of frame, they are all designed in the vertical direction, so this test device cannot perform system fatigue test on the four-bar linkage traction mechanism, and the structure design and loading mode are also completely different from those of the present patent. SUMMARY

[0008] The technical problem to be solved by the present invention is how to effectively perform fatigue test on the four-bar linkage traction mechanism of a railway vehicle.

[0009] In order to solve the above problems, the technical scheme of the present application is as follows: a four-bar linkage traction mechanism rotating fatigue test device, which comprises a left anti-tilting rod assembly and a right anti-tilting rod assembly, a rotating platform, a bottom platform and an oil cylinder, the bottom of the rotating platform is fixed on the bottom platform, one end of the rotating platform on the inner side is hinged to one end of the left anti-tilting rod assembly, and the other end of the rotating platform on the inner side is hinged to one end of the right anti-tilting rod assembly; one end of the oil cylinder is hinged to one end of the rotating platform on the outer side, so that the oil cylinder can drive the rotating platform and the traction mechanism to rotate when the oil cylinder is extended or retracted.

[0010] Preferably, the rotating platform comprises a vertical platform and a rotating mechanism, the bottom of the rotating mechanism is fixed on the bottom platform, the vertical platform is in the shape of a hollow cuboid, and the outer side of the vertical platform is fixedly connected to one side of the rotating mechanism; the hinged connection of the rotating platform to the left anti-tilting rod assembly, the right anti-tilting rod assembly and the oil cylinder respectively refers to the hinged connection of the vertical platform to the left anti-tilting rod assembly, the right anti-tilting rod assembly and the oil cylinder respectively.

[0011] Preferably, the rotating mechanism comprises horizontal support plates, a rotating shaft and a bearing seat, the upper end and the lower end of the outer side of the vertical platform are respectively fixedly connected with one horizontal support plate, the bottom of the bearing seat is fixed on the bottom platform, the rotating shaft passes through the two horizontal support plates, and the lower end of the rotating shaft is rotatably connected to the bearing seat.

[0012] Preferably, the device further comprises a fixed frame, the fixed frame comprises stable frames and longitudinal support plates, the stable frames are arranged on the two sides of the rotating mechanism, and the bottom of each stable frame is fixed on the bottom platform; the two ends of each longitudinal support plate are fixedly connected to the stable frames, the longitudinal support plates are arranged above the vertical platform, and the upper end of the rotating shaft is installed on the longitudinal support plates through bearings.

[0013] Preferably, the stable frame comprises a bottom plate, a stable plate and a vertical plate, the bottom plate and the vertical plate are both in the shape of a cuboid, the bottom plate is fixedly connected to the bottom platform, and the lower end of the vertical plate is connected to the bottom plate; the cross section of the stable plate is in the shape of a triangle or a trapezoid, and the two sides of the stable plate are fixedly connected to the bottom plate and the vertical plate respectively.

[0014] Preferably, the device further comprises a longitudinal stabilizing mechanism, the longitudinal stabilizing mechanism comprises counterforce seats, guide seats and longitudinal pull rods, one counterforce seat is arranged at each end of the longitudinal direction of the bottom platform, a guide seat is arranged between the two counterforce seats, the bottom of each counterforce seat and the guide seat is fixed on the bottom platform, the longitudinal pull rod passes through the counterforce seats and the guide seat, and the two ends of the longitudinal pull rod are fixedly connected to the counterforce seats.

[0015] Preferably, the transverse stabilizing mechanism comprises a transverse support, a stabilizing rod and a transverse pull rod, one transverse support is arranged at each end of the bottom platform in the transverse direction, the two ends of the stabilizing rod and the transverse pull rod are fixedly connected with the transverse supports, and the stabilizing rod is arranged below the transverse pull rod; the vertical stoppers are fixed at the bottom of the bottom platform, and one vertical stopper is arranged below each end of the vertical platform, and a space is left between the vertical stoppers and the vertical platform.

[0016] The four-bar linkage traction mechanism rotation fatigue test method comprises a left anti-roll bar assembly and a right anti-roll bar assembly, the two ends of the inside of a rotating platform are hingedly connected with the left anti-roll bar assembly and the right anti-roll bar assembly by arranging the rotating platform on a bottom platform, and the rotating platform and the traction mechanism are driven to rotate by an oil cylinder, so that the fatigue test of the traction mechanism is carried out.

[0017] Preferably, horizontal support plates, a rotating shaft and a bearing seat are arranged in the rotating platform, one horizontal support plate is fixedly connected with the upper end and the lower end of the outside of the vertical platform, the bottom of the bearing seat is fixed on the bottom platform, the rotating shaft penetrates through the two horizontal support plates, and the lower end of the rotating shaft is rotatably connected with the bearing seat; and a fixed frame is arranged on the bottom platform in the longitudinal direction, the upper end of the rotating shaft is mounted on the fixed frame through a bearing, and the fixed frame reinforces the rotating platform.

[0018] Preferably, a longitudinal stabilizing mechanism, a transverse stabilizing mechanism and a vertical stopper are arranged on the bottom platform, a counterforce seat and a longitudinal pull rod are arranged in the longitudinal stabilizing mechanism, the counterforce seat is fixed at the two ends of the bottom platform in the longitudinal direction, and the counterforce seat is reinforced by the longitudinal pull rod, so as to increase the longitudinal bearing capacity of the counterforce seat; a transverse support, a stabilizing rod and a transverse pull rod are arranged in the transverse stabilizing mechanism, the transverse supports are fixed at the two ends of the bottom platform in the transverse direction, and the transverse supports are reinforced by the stabilizing rod and the transverse pull rod, so as to increase the transverse bearing capacity of the fatigue test device; the vertical stoppers are arranged below the two ends of the vertical platform, and a space is left between the vertical stoppers and the vertical platform, so as to reduce the deflection angle or the downward displacement distance of the vertical platform.

[0019] The beneficial technical effects of the present application are as follows:

[0020] The existing test device for simulating the steering of the traction mechanism is divided into two types. One is to respectively perform stretching, torsion or deflection test on the components of the traction mechanism to replace the whole traction mechanism system test. This way only reflects the fatigue performance of a single product, but cannot truly reflect the fatigue performance of the product after being assembled into a system. The other way can perform system test on the traction mechanism, but the structure is complex, the test cost is high, the operation is inconvenient, and the requirement of the 1130mm (distance between bogie and frame) rotation center of the traction mechanism cannot be guaranteed. The test device and method of the present application refers to the design of installing the traction mechanism in the vehicle body frame and the bogie. The frame is a fixed device with "L" shape left and right beam structure welded by steel plates. The bogie is a movable device composed of rotating hinges and mounting platforms. The lower end of the traction mechanism is fixed to the frame, and is connected to the rotating platform through the upper end joint bearing. The horizontal loading points are designed at the positions deviated from the center by 600mm on both sides of the rotating platform. The horizontal oil cylinder with hinges installed in front and back is used to apply load to the rotating platform. The rotating fatigue test is performed through the rotating arm formed by the eccentricity of the platform. The test design has force application support points on both left and right sides of the platform. The load can be applied on the left side or the right side alone, or two load oil cylinders can be installed on both left and right sides to apply a pair of force couples with opposite directions to perform the steering fatigue test of the traction mechanism. This way not only guarantees the rotation center of the traction mechanism, but also simulates the real motion mode of the traction mechanism (the actual installation motion mode is to fix the lower end and apply a rotating torque to the upper end). The fatigue performance of the traction mechanism can be more accurately tested, and the cause of the rotating abnormal noise can be more conveniently found.

[0021] The traditional horizontal single-point rotation is a traditional cantilever beam support structure. In order to meet the structural strength requirements of horizontal push-pull force, the diameter of the rotating shaft needs to be infinitely increased or many reinforcing rib structures are added at the root. This way not only causes the test device to be heavy, inconvenient to transport and operate, but also increases the cost. Even the strengthened structure design sometimes still fails, causing the rotating shaft to bend and deform, and thus cannot meet the requirements of long-term fatigue test. The present application designs a "M" guide device at the upper end (end) of the horizontal rotation support point, so that the rotating shaft has horizontal bearing supports at the bottom end and the upper end. The original cantilever beam with single-point stress is optimized into a simply supported beam structure with two-point stress. This way greatly improves the fatigue life of the test device, and meets the requirements of horizontal large load push-pull.

[0022] The existing horizontal loading device is mostly fixed on the reaction seat, and then the reaction seat is fixed on the test machine platform through T-shaped bolt and pressing plate. When the horizontal oil cylinder exerts the push-pull force on the traction mechanism, the reaction force is consumed by the friction between the reaction seat and the test platform. Since the rear reaction seat and the front rotating device do not form a force closed loop, when the push-pull force is greater than the friction, the reaction force starts to slip and the test cannot be carried out. The application is to design an "L"-shaped bottom plate, and the guide seat and the reaction seat are welded into an integral structure, so that the entire test device forms an internal force balanced frame structure, thereby increasing the longitudinal bearing capacity of the reaction seat, and meeting the requirements of fatigue test.

[0023] The lateral swing of the test device is one of the main reasons for the failure of fatigue test or poor test effect. In order to effectively prevent the traction mechanism from producing lateral swing during the rotating fatigue test, the traditional scheme is to consciously install the bottom end of the test device between the test platforms with vertical frames on both sides, and then install guide seats on both sides to limit the lateral movement of the test device. This method has certain limitations, but the test device cannot be tested when it leaves this test platform. The application is to design two reaction seats on both sides of the test device and weld them on both sides of the frame, and at the same time, the lateral support and the stabilizing rod are integrated through the transverse pull rod, so that the original single bearing becomes integral bearing, which not only increases the lateral bearing capacity of the test tool, but also solves the problem of installation site limitation.

[0024] The existing scheme is to prevent the traction mechanism from producing vertical up-down swing through the cooperation of the rotating shaft and the rotating bearing. Since the rotating platform has large installation span, it is easy to form a swing force arm. When the rotating test produces small up-down deflection, the deflection displacement is enlarged through the force arm, which leads to the failure of test. The application is to weld vertical stops on the left and right sides of the lower end of the rotating platform, and reserve(1-2)mm gap with the rotating platform, and coat lubricating grease at the friction place, so as to eliminate the up-down swing of the vertical platform in the vertical direction through the friction between the two, thereby improving the stability and reliability of fatigue.

[0025] The fatigue performance of the traction mechanism is currently obtained by three methods. The first method is a vehicle test method, which directly installs the traction mechanism between the bogie and the frame of the monorail vehicle, and observes the bearing state of the traction mechanism after a period of use to verify whether it meets the use requirements. This method has a long test cycle, high risk, and cannot obtain specific test data to guide the design and research of the product. The second method is a finite element calculation method, which has a large difference between the obtained data and the actual value, and can only be used as a design reference. The third method is a test method, which designs a test device and method that meets the actual working conditions of rotation. The present application uses this test device and method. The traction mechanism is installed on a special test device, and the fatigue performance of the traction mechanism is tested by applying a rotating load by the test equipment. The specific test data of the product before formal use can be obtained to guide the optimization design of the product structure, ensure the product quality before installation, and greatly improve the safety of the traction mechanism.

[0026] The technical scheme of the present application can directly measure the fatigue performance of the four-bar linkage traction mechanism under the system loading working condition, and can also obtain the stress test data of the key bearing parts during the system loading test, which provides an important design reference for product development and avoids the long cycle and high risk of the vehicle test method.

[0027] The technical scheme of the present application realizes the technical upgrading from the product part test to the component test of the rail vehicle system components, fully utilizes the existing test resources in the laboratory to meet the system loading test, does not need to purchase a new special combined loading test machine, and has good universality and interchangeability, which reduces the development cost and improves the work efficiency.

[0028] The technical scheme of the present application has good popularization and application prospect: the technical scheme can not only be used for the system fatigue test of the four-bar linkage traction mechanism of the rail vehicle, but also meets the system loading fatigue test requirements of similar four-bar linkage traction mechanisms. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the embodiment one;

[0030] Figure 2 It is a schematic diagram of the overall structure of the four-bar linkage traction mechanism; Figure 1

[0031] Figure 3

[0032] ​​In the diagram: Base plate 01, Stabilizing plate 02, Vertical plate 03, Vertical platform 11, Horizontal support plate 12, Rotating shaft 13, Bearing seat 14, Fixed frame 2, Longitudinal support plate 21, Bottom platform 3, Vertical stop 4, Reaction seat 51, Guide seat 52, Longitudinal tie rod 53, Hydraulic cylinder 6, Hinge seat 7, Transverse support 8, Stabilizing rod 81, Transverse tie rod 82, Four-bar linkage traction mechanism 9, Left anti-tilt bar assembly 911, Right anti-tilt bar assembly 912, Torsion arm 92, Anti-tilt bar 93, Hydraulic spring assembly 94, Traction link 95. Detailed Implementation

[0033] The present invention will be further described below with reference to embodiments and accompanying drawings: Example 1

[0034] like Figure 1 and Figure 2 As shown, the fatigue testing device includes a rotating platform, a base platform 3, a hydraulic cylinder 6, a fixed frame 2, a longitudinal stabilizing mechanism, a transverse stabilizing mechanism, and a vertical stop 4. The rotating platform includes a vertical platform 11 and a rotating mechanism. In this embodiment, the vertical platform 11 is a hollow cuboid with reinforcing ribs in the hollow area. This reduces the weight of the vertical platform 11 while providing strong load-bearing capacity. In this embodiment, the side of the vertical platform 11 closest to the four-bar linkage 9 is the inner side, and the other side is the outer side. The bottom of the rotating mechanism is fixed to the base platform 3, and the outer side of the vertical platform 11 is fixedly connected to one side of the rotating mechanism, leaving a large gap between the vertical platform 11 and the base platform 3. The four-bar linkage traction mechanism 9 includes a left anti-tilt rod assembly 911 and a right anti-tilt rod assembly 912. One end of the inner side of the vertical platform 11 is hinged to one end of the left anti-tilt rod assembly 911, and the other end of the inner side of the vertical platform 11 is hinged to one end of the right anti-tilt rod assembly 912.

[0035] The rotating mechanism includes a horizontal support plate 12, a rotating shaft 13, and a bearing seat 14. A horizontal support plate 12 is fixedly connected to the upper and lower ends of the outer side of the vertical platform 11, respectively. The bottom of the bearing seat 14 is fixed to the bottom platform 3. The rotating shaft 13 passes through the two horizontal support plates 12, and its lower end is rotatably connected to the bearing seat 14. Both the horizontal support plate 12 and the bearing seat 14 are connected to the rotating shaft 13 via bearings, allowing both the horizontal support plate 12 and the vertical platform 11 to rotate around the rotating shaft 13.

[0036] The fixed frame 2 comprises a stable frame and a longitudinal support plate 21. The stable frame is arranged on both sides of the rotating mechanism, and the bottom of the stable frame is fixed on the bottom platform 3. The stable frame comprises a bottom plate 01, a stable plate 02 and a vertical plate 03. The bottom plate 01 and the vertical plate 03 are both cuboids. The bottom plate 01 is fixedly connected to the bottom platform 3, and the lower end of the vertical plate 03 is connected to the bottom plate 01. The stable plate 02 is triangular or trapezoidal in cross section. In this embodiment, the two stable plates 02 are fixedly connected to the bottom plate 01 and the vertical plate 03 on both sides, respectively. The longitudinal support plate 21 is fixedly connected to the vertical plate 03 of the stable frame at both ends, is arranged above the vertical platform 11, and the upper end of the rotating shaft 13 is mounted on the longitudinal support plate 21 through a bearing, so as to reinforce the rotating shaft 13.

[0037] The longitudinal stable mechanism comprises a counterforce seat 51, a guide seat 52 and a longitudinal pull rod 53. The bottom platform 3 is provided with one counterforce seat 51 at each end in the longitudinal direction. The two counterforce seats 51 are provided with a guide seat 52 therebetween. The bottom of the counterforce seat 51 and the guide seat 52 is fixed on the bottom platform 3. The longitudinal pull rod 53 passes through the counterforce seat 51 and the guide seat 52, and the two ends of the longitudinal pull rod 53 are fixedly connected to the counterforce seat 51, so as to reinforce the counterforce seat 51 and increase the longitudinal bearing capacity of the counterforce seat 51. In this embodiment, the length of the longitudinal pull rod 53 and the oil cylinder 6 is large. In order to ensure that the oil cylinder 6 is not easy to deviate or shake under the action of force during the experiment, a guide seat 52 is arranged between the two counterforce seats 51. The vertical plate 03 of the guide seat 52 limits the oil cylinder 6 and the longitudinal pull rod 53.

[0038] The transverse stable mechanism comprises a transverse support 8, a stable rod 81 and a transverse pull rod 82. The bottom platform 3 is provided with one transverse support 8 at each end in the transverse direction. The two ends of the stable rod 81 and the transverse pull rod 82 are fixedly connected to the transverse support 8, and the stable rod 81 is arranged below the transverse pull rod 82. The stable rod 81 and the transverse pull rod 82 reinforce the transverse support 8, so as to increase the transverse bearing capacity of the fatigue test device. In this embodiment, the stable frame is arranged in the counterforce seat 51, the guide seat 52 and the transverse support 8. The stable frame of the counterforce seat 51 and the guide seat 52 shares the same vertical plate 03. The bottom plate 01 and the stable plate 02 are symmetrically arranged on both sides of the vertical plate 03. Each transverse support 8 has an independent stable frame.

[0039] The bottom of the vertical stop 4 is fixed on the bottom platform 3. The lower part of each end of the vertical platform 11 is provided with a vertical stop 4. There is a space between the vertical stop 4 and the vertical platform 11. In this embodiment, the two vertical stops 4 are both cuboids. The space between the vertical stop 4 and the vertical platform 11 is 1mm-2mm. When the vertical platform 11 deviates or deviates downward, the vertical stop 4 can block the deviation or downward deviation of the vertical platform 11.

[0040] As Figure 2 and Figure 3 shown, the four-bar linkage traction mechanism 9 includes a left anti-roll bar assembly 911, a right anti-roll bar assembly 912, a torsion arm 92, an anti-roll bar 93, an oil pressure spring assembly 94 and a traction link 95. The lower end of the left anti-roll bar assembly 911 is connected to a traction link 95, and the upper end of the left anti-roll bar assembly 911 is connected to the torsion arm 92, which is connected to a traction link 95. The lower end of the right anti-roll bar assembly 912 is connected to a traction link 95, and the upper end of the right anti-roll bar assembly 912 is connected to the torsion arm 92, which is connected to a traction link 95. Thus, the four-bar linkage traction mechanism 9 is formed. The two torsion arms 92 are connected by the anti-roll bar 93 and the oil pressure spring assembly 94, and the other ends of the two traction links 95 connected to the left anti-roll bar assembly 911 are hinged to the left end of the inside of the vertical platform 11, and the other ends of the two traction links 95 connected to the right anti-roll bar assembly are hinged to the right end of the inside of the vertical platform 11.

[0041] As Figures 1 to 3 shown, when the fatigue test is performed, the oil cylinder 6 is first started to make the piston rod of the oil cylinder 6 extend and retract, driving the vertical platform 11 to rotate around the rotating shaft 13, thereby performing the fatigue test on the four-bar linkage traction mechanism 9 through the traction link 95. The longitudinal stabilizing mechanism, the transverse stabilizing mechanism and the vertical stop 4 respectively stabilize the longitudinal, transverse and vertical directions of the fatigue test device, thereby stably and effectively performing the fatigue test on the four-bar linkage traction mechanism 9.

[0042] Obviously, several improvements or modifications made without departing from the principles of the present application should be considered as falling within the scope of the present application.

Claims

1. A four-bar linkage rotation fatigue test device of a four-bar linkage including a left anti-roll bar assembly and a right anti-roll bar assembly, characterized by, The utility model relates to a rotating platform, a bottom platform and a cylinder, the bottom of the rotating platform is fixed on the bottom platform, one end of the inner side of the rotating platform is hinged with one end of the left anti-tilt rod assembly, the other end of the inner side of the rotating platform is hinged with one end of the right anti-tilt rod assembly, one end of the cylinder is hinged with one end of the outer side of the rotating platform, the cylinder can drive the rotating platform and the traction mechanism to rotate when the cylinder extends or retracts, the rotating platform comprises a vertical platform and a rotating mechanism, the bottom of the rotating mechanism is fixed on the bottom platform, the vertical platform is hollow cuboid, the outer side of the vertical platform is fixedly connected with one side of the rotating mechanism, the rotating platform is hinged with the left anti-tilt rod assembly, the right anti-tilt rod assembly and the cylinder respectively, which means that the vertical platform is hinged with the left anti-tilt rod assembly, the right anti-tilt rod assembly and the cylinder respectively, the rotating mechanism comprises a horizontal support plate, a rotating shaft and a bearing seat, one horizontal support plate is fixedly connected with the upper end and the lower end of the outer side of the vertical platform respectively, the bottom of the bearing seat is fixed on the bottom platform, the rotating shaft passes through the two horizontal support plates, and the lower end of the rotating shaft is rotatably connected on the bearing seat, the utility model further comprises a fixed frame, the fixed frame comprises a stable frame and a longitudinal support plate, the stable frame is arranged on the two sides of the rotating mechanism, and the bottom of the stable frame is fixed on the bottom platform, the two ends of the longitudinal support plate are fixedly connected with the stable frame, the longitudinal support plate is arranged above the vertical platform, and the upper end of the rotating shaft is installed on the longitudinal support plate through a bearing.

2. A four-bar linkage mechanism rotation fatigue test apparatus according to claim 1, characterized by The stable frame comprises a bottom plate, a stable plate and a vertical plate, the bottom plate and the vertical plate are both cuboid, the bottom plate is fixedly connected on the bottom platform, and the lower end of the vertical plate is connected with the bottom plate, the cross section of the stable plate is triangular or trapezoidal, and the two sides of the stable plate are fixedly connected with the bottom plate and the vertical plate respectively.

3. A four-bar linkage mechanism rotation fatigue test apparatus according to claim 2, characterized by The utility model further comprises a longitudinal stable mechanism, the longitudinal stable mechanism comprises a counter-force seat, a guide seat and a longitudinal pull rod, one counter-force seat is arranged at the two ends of the longitudinal direction of the bottom platform respectively, the guide seat is arranged between the two counter-force seats, the bottom of the counter-force seat and the guide seat is fixed on the bottom platform, the longitudinal pull rod passes through the counter-force seat and the guide seat, and the two ends of the longitudinal pull rod are fixedly connected with the counter-force seat.

4. A four-bar linkage mechanism rotation fatigue test apparatus according to claim 3, characterized by The utility model further comprises a transverse stable mechanism and a vertical stop, the transverse stable mechanism comprises a transverse support, a stable rod and a transverse pull rod, one transverse support is arranged at the two ends of the transverse direction of the bottom platform respectively, the two ends of the stable rod and the transverse pull rod are fixedly connected with the transverse support, and the stable rod is arranged below the transverse pull rod, the bottom of the vertical stop is fixed on the bottom platform, and the lower side of the two ends of the vertical platform is respectively provided with a vertical stop, and a space is left between the vertical stop and the vertical platform.

5. A method of a four-bar linkage rotation fatigue test, the four-bar linkage including a left anti-roll bar assembly and a right anti-roll bar assembly, the method comprising: The two ends of the rotating platform are hinged with the left and right anti-tilting rod assemblies respectively, and the rotating platform and the traction mechanism are driven to rotate by the oil cylinder, so as to conduct fatigue test on the traction mechanism; the horizontal support plates, the rotating shaft and the bearing seat are arranged in the rotating platform, one horizontal support plate is fixedly connected to the upper end and the lower end of the vertical platform respectively, the bottom of the bearing seat is fixed on the bottom platform, the rotating shaft penetrates through the two horizontal support plates, and the lower end of the rotating shaft is rotatably connected to the bearing seat; a fixed frame is arranged on the bottom platform in the longitudinal direction, the upper end of the rotating shaft is installed on the fixed frame through a bearing, and the fixed frame reinforces the rotating platform; the longitudinal stabilizing mechanism, the transverse stabilizing mechanism and the vertical stopper are arranged on the bottom platform, the counterforce seat and the longitudinal pull rod are arranged in the longitudinal stabilizing mechanism, the counterforce seat is fixed at the two ends of the bottom platform in the longitudinal direction, and the counterforce seat is reinforced by the longitudinal pull rod, so that the load-carrying capacity of the counterforce seat in the longitudinal direction is increased; the transverse support, the stabilizing rod and the transverse pull rod are arranged in the transverse stabilizing mechanism, the transverse support is fixed at the two ends of the bottom platform in the transverse direction, and the transverse support is reinforced by the stabilizing rod and the transverse pull rod, so that the transverse load-carrying capacity of the fatigue test device is increased; the vertical stoppers are arranged below the two ends of the vertical platform respectively, and a space is left between the vertical stoppers and the vertical platform, so that the deflection angle or the downward deviation distance of the vertical platform is reduced.

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