CN220039828U - Multi-connecting-rod rear auxiliary frame test device - Google Patents

Abstract

The utility model discloses a multi-connecting-rod rear auxiliary frame test device which comprises a fixing assembly and a test assembly, wherein the fixing assembly and the test assembly are detachably arranged on a rear auxiliary frame, the fixing assembly comprises a stand column base and a stand column square box, the stand column square box is detachably arranged on the stand column base, and one side of the stand column square box is detachably arranged with the rear auxiliary frame; the auxiliary frame is detachably mounted on the fixing assembly, the auxiliary frame is fixed on the test platform, the test assembly is mounted on the test point required by the auxiliary frame, the loading times, the running frequency and the force value are set for the servo actuator, the servo actuator transmits the mechanical force output by the servo actuator to the test mounting point of the auxiliary frame through the actuator connecting rod, the test data of the mechanical property and the fatigue durability of the auxiliary frame are obtained, the test working condition of the real vehicle can be effectively simulated, the required test time is short, the test cost is saved, and the test efficiency and the test accuracy are improved.

Description

Multi-connecting-rod rear auxiliary frame test device

Technical Field

The utility model belongs to the technical field of auxiliary frame bench test development, and particularly relates to a multi-connecting-rod rear auxiliary frame test device.

Background

The rear auxiliary frame is a chassis structural part of a passenger car and is an installation platform of important components such as a tire, a steering knuckle, a longitudinal arm, a control arm, a stabilizer bar, a shock absorber and the like, the mechanical properties and fatigue durability of the rear auxiliary frame directly determine the riding experience, the running performance and the reliability of the car, and the chassis system vibration bench test is required to be carried out to obtain mechanical properties and fatigue durability test data of different test items so as to evaluate the mechanical properties and the fatigue durability of the rear auxiliary frame.

However, the real vehicle testing method is used, the testing time is longer due to the difference of testing environments, strict requirements are made on the road conditions of the test, meanwhile, the required testing cost is higher, the testing function of the existing testing device is limited, the fatigue endurance tests in different directions can not be carried out on different parts of the rear auxiliary frame, or the static load test with the specified loading speed can not be realized, so that the testing efficiency is lower, and the testing data is not accurate enough.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model aims to provide a multi-connecting-rod rear auxiliary frame test device.

The technical scheme adopted by the utility model is as follows: the device comprises a fixing assembly and a test assembly, wherein the fixing assembly and the test assembly are detachably arranged on a rear auxiliary frame, the fixing assembly comprises a column base and a column square box, the column square box is detachably arranged on the column base, and one side of the column square box is detachably arranged with the rear auxiliary frame; the test assembly comprises a loading plate and an actuator connecting rod, wherein the actuator connecting rod is detachably connected with the loading plate, and the loading plate comprises a horizontal loading plate and a vertical loading plate.

Preferably, the two fixing assemblies are respectively positioned at the left side and the right side of the rear auxiliary frame, and the two fixing assemblies are arranged in a mirror image mode by taking the center of the rear auxiliary frame as a symmetrical plane.

As a preferred aspect of the present utility model, the rear subframe includes a body bushing, a trailing arm, a stabilizer bar, a control arm bracket, a shock absorber bracket, and a knuckle; the fixing assembly further comprises a vehicle body installation block and a trailing arm installation block, one sides of the vehicle body installation block and the trailing arm installation block are respectively and fixedly installed on the upright column square box, the other sides of the vehicle body installation block are installed on the vehicle body bushing through bolts, and the other sides of the trailing arm installation block are installed on the trailing arm through bolts.

As a preferred aspect of the present utility model, the test assembly includes a simple hub, a horizontal loading plate, a longitudinal joint, an end knuckle bearing and an actuator connecting rod, wherein the simple hub is fixed on the knuckle, the horizontal loading plate is fixed on the simple hub, the longitudinal joint is fixed at one end of the horizontal loading plate, the longitudinal joint is located at one side of the horizontal loading plate away from the simple hub, the longitudinal joint is hinged with the end knuckle bearing, and the end knuckle bearing is detachably mounted with the actuator connecting rod.

As a preferred aspect of the present utility model, the test assembly includes a simple hub fixed to the knuckle, a horizontal loading plate fixed to the simple hub, a lateral joint fixed to the horizontal loading plate, an end knuckle bearing hinged to the end knuckle bearing, and an actuator connecting rod.

As the preferable mode of the utility model, the test assembly comprises a simple hub, a vertical loading plate, a vertical joint, an end joint bearing and an actuator connecting rod, wherein the simple hub is fixed on the knuckle, the vertical loading plate is fixed on the simple hub, the vertical joint is fixed at one end of the vertical loading plate, the simple hub is suspended to a designated height by a steel wire rope fixed on a hanging bracket so as to ensure that the position of a wheel center relative to a rear auxiliary frame is consistent with the load regulated by the test, the vertical joint is hinged with the end joint bearing, and the end joint bearing is detachably mounted with the actuator connecting rod.

As the preferable mode of the utility model, the test assembly comprises a stabilizer bar connector, an end knuckle bearing and an actuator connecting rod, wherein one end of the stabilizer bar connector is connected to a mounting hole at the tail end of the stabilizer bar, the other end of the stabilizer bar connector is hinged with the end knuckle bearing, and the end knuckle bearing is detachably mounted with the actuator connecting rod.

Preferably, the test assembly comprises an RDU joint, an end knuckle bearing and an actuator connecting rod, wherein the RDU joint is fixed on the rear auxiliary frame, the RDU joint is hinged with the end knuckle bearing, and the end knuckle bearing is detachably arranged with the actuator connecting rod.

Preferably, the test assembly comprises a lower control arm joint, an end joint bearing and an actuator connecting rod, wherein the lower control arm joint is fixed on the lower control arm support, the lower control arm joint is hinged with the end joint bearing, and the end joint bearing is detachably arranged with the actuator connecting rod.

Preferably, the test assembly comprises a shock absorber joint, an end knuckle bearing and an actuator connecting rod, wherein the shock absorber joint is fixed on the shock absorber support, the shock absorber joint is hinged with the end knuckle bearing, and the end knuckle bearing is detachably arranged with the actuator connecting rod.

The beneficial effects of the utility model are as follows:

1. the utility model is used as a multi-connecting-rod rear auxiliary frame test device, the rear auxiliary frame is detachably arranged on the fixed component, the rear auxiliary frame is fixed on the test platform, the test component is arranged on the test point required by the rear auxiliary frame, the loading times, the running frequency and the force value are set for the servo actuator, the servo actuator transmits the mechanical force output by the servo actuator to the test mounting point of the rear auxiliary frame through the actuator connecting rod, the mechanical property and the fatigue durability test data of the rear auxiliary frame are obtained, the mechanical property and the fatigue durability of the rear auxiliary frame are evaluated, the test working condition of the real vehicle can be effectively simulated, the required test time is shorter, the test cost is saved, and the test efficiency and the precision are improved;

the longitudinal circulating force load and the static force load transmitted to the rear auxiliary frame by simulating the wheel center of the wheel can effectively simulate the service condition of the rear auxiliary frame on a real road, and the fatigue durability and the structural strength of the rear auxiliary frame can be detected;

the longitudinal and transverse circulating force load and the static force load applied to the rear auxiliary frame by simulating the wheel grounding point can effectively simulate the service condition of the rear auxiliary frame on a real road, and detect the fatigue durability and the structural strength of the rear auxiliary frame;

the vertical circulating force load and the static force load transmitted to the rear auxiliary frame by simulating the wheel center of the wheel can effectively simulate the service condition of the rear auxiliary frame on a real road, and the fatigue durability and the structural strength of the rear auxiliary frame can be detected;

the vertical circulating force load and the static force load applied to the stabilizing rod of the rear auxiliary frame by simulating the wheels can effectively simulate the service condition of the rear auxiliary frame on a real road, and the fatigue durability and the structural strength of the stabilizing rod of the rear auxiliary frame can be detected;

the vertical circulating force load and the static force load applied to the rear wheel drive unit (RDU) bracket of the rear auxiliary frame by simulating the wheels can effectively simulate the use condition of the rear auxiliary frame on a real road, and the fatigue durability and the structural strength of the rear wheel drive unit (RDU) bracket of the rear auxiliary frame can be detected;

the circulating force load and the static force load applied to the rear lower control arm support of the rear auxiliary frame by simulating the wheels can effectively simulate the service condition of the rear auxiliary frame on a real road, and the fatigue durability and the structural strength of the rear lower control arm support of the rear auxiliary frame can be detected;

the circulating force load and the static force load applied to the rear auxiliary frame shock absorber support by the simulated wheels can effectively simulate the service condition of the rear auxiliary frame on a real road, and the fatigue durability and the structural strength of the rear auxiliary frame shock absorber support can be detected.

2. The chassis suspension structure is simulated through the test assembly consisting of the stabilizer bar connector, the end joint bearing and the actuator connecting rod, the vertical (Z-direction) circulating force load and the static load are applied to the stabilizer bar of the rear auxiliary frame, one end of the stabilizer bar connector is connected with the mounting hole at the tail end of the stabilizer bar, the other end of the stabilizer bar connector is hinged with the end joint bearing through a bolt, the end joint bearing is connected with the actuator connecting rod and locked by a nut, so that the motion interference of the actuator connecting rod and the stabilizer bar connector is eliminated, and the simulation precision of the test is improved and the service life of the test device is prolonged.

3. The chassis suspension structure is simulated through the test assembly consisting of the RDU connector, the end joint bearing and the actuator connecting rod, the vertical (Z-direction) circulating force load and the static load are applied to the RDU bracket of the rear auxiliary frame, one end of the RDU connector is connected with the mounting hole of the RDU bracket, the other end of the RDU connector is hinged with the end joint bearing through a bolt, the end joint bearing is connected with the actuator connecting rod and locked by a nut, so that the motion interference of the actuator connecting rod and the RDU connector is eliminated, the simulation precision of a test is improved, and the service life of the test device is prolonged.

4. The chassis suspension structure is simulated through the test assembly consisting of the rear lower control arm joint, the end joint bearing and the actuator connecting rod, the transverse (Y-direction) circulating force load and the static load are applied to the rear lower control arm support of the rear auxiliary frame, one end of the rear lower control arm joint is connected with the mounting hole of the rear lower control arm support, the other end of the rear lower control arm joint is hinged with the end joint bearing through a bolt, the end joint bearing is connected with the actuator connecting rod and locked by a nut, so that the motion interference of the actuator connecting rod and the rear lower control arm joint is eliminated, the simulation precision of a test is improved, and the service life of the test device is prolonged.

5. The test assembly which consists of the shock absorber joint, the end joint bearing and the actuator connecting rod simulates a chassis suspension structure, the shock absorber support of the rear auxiliary frame is applied with circulating force load and static load in a specified direction, one end of the shock absorber joint is connected with the mounting hole of the shock absorber support, the other end of the shock absorber joint is hinged with the end joint bearing through a bolt, the end joint bearing is connected with the actuator connecting rod and locked by a nut, so that the motion interference of the actuator connecting rod and the shock absorber joint is eliminated, and the simulation precision of a test is improved and the service life of the test device is prolonged.

6. The four vehicle body fixing assemblies of the rear auxiliary frame simulate the connection structure form of the rear auxiliary frame and the vehicle body, and meet the requirement of vehicle body rigidity, so that the stress deformation condition of the rear auxiliary frame is consistent with the stress deformation condition of the vehicle when the vehicle runs on an actual road in the test process.

7. The rear auxiliary frame body fixing component simulates the connection structure form of the rear auxiliary frame and the vehicle body, and considers the fatigue endurance test and the strength test conditions, the fixing component is of a splice welded steel plate structure, and reinforcing ribs are arranged at the stress concentration positions, so that the aim of structural reinforcement is fulfilled, and the structural rigidity is ensured to meet the test requirements. Simultaneously, processing bolt through-hole at stand base and stand square chest surface for fixed trailing arm installation piece, preceding automobile body installation piece and back automobile body installation piece, accessible change stand position and stand gasket 22 thickness change the position of installation piece on the stand to the spatial position of adaptation back sub vehicle frame's trailing arm support, preceding automobile body bush and back automobile body bush changes, has stronger assembly flexibility to other types of many connecting rods back sub vehicle frame, promotes its multipurpose value.

8. The longitudinal arm mounting block, the front vehicle body mounting block, the rear vehicle body mounting block, the horizontal loading plate and the vertical loading plate are subjected to structural reinforcement, have enough structural rigidity, can bear the acting force applied to the rear auxiliary frame by the actuator, effectively fix the rear auxiliary frame, ensure that the actuator outputs acting force with specified direction and force value according to test project requirements, and have simple structure, and are easy to assemble and maintain.

9. The rear auxiliary frame is fixed on the test platform in the same direction or in the opposite direction according to the installation of the real vehicle, and on the premise of meeting the cyclic force load and the static force load required by the test standard, the strength test and the fatigue durability test of all connecting parts and parts of the rear auxiliary frame can be realized, so that the structure of the test device is simplified, and the assembly efficiency of the test device is improved.

Drawings

The utility model will be described in further detail with reference to the accompanying drawings and detailed description.

FIG. 1 is a schematic view of a wheel center horizontal plane longitudinal (X-direction) loading state according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a wheel ground point horizontal plane longitudinal (X-direction) loading condition according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a horizontal (Y-direction) loading state of a wheel ground point according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a wheel center vertical (Z-direction) loading state according to an embodiment of the present utility model;

FIG. 5 is a schematic view of a vertical (Z-direction) loading state of a stabilizer bar according to an embodiment of the present utility model;

fig. 6 is a schematic view showing a vertical test (Z-direction) loading state of a rear wheel drive unit bracket according to an embodiment of the present utility model.

Fig. 7 is a schematic view of a horizontal lateral (Y-direction) loading state of a lower control arm support according to an embodiment of the present utility model.

FIG. 8 is a schematic view of a shock absorber bracket in a space tilt loading condition according to an embodiment of the present utility model.

In the figure: 1. a rear subframe; 2. a fixing assembly; 3. a test assembly; 11. a vehicle body liner; 12. a trailing arm; 13. a stabilizer bar; 14. a control arm support; 15. a shock absorber bracket; 16. a knuckle; 17. a bushing fixing block; 21. a column square box; 22. a column gasket; 23. a column base; 24. a vehicle body mounting block; 25. a trailing arm mounting block; 31. an end knuckle bearing; 32. an actuator connecting rod; 33. a simple hub; 301. a longitudinal joint; 302. a transverse joint; 303. a vertical joint; 304. a stabilizer bar joint; 305. RDU joints; 306. a control arm joint; 307. a shock absorber joint; 308. RDU joints; 311. a horizontal loading plate; 312. a vertical loading plate.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the utility model, i.e., the embodiments described are merely some, but not all, of the embodiments of the utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

As shown in fig. 1, the present embodiment provides a rear subframe 1 test apparatus, a wheel center horizontal longitudinal (X-direction) cyclic force load and static load bench test apparatus, a stationary assembly 2 mimicking a vehicle body, comprising: a column base 23, column spacers 22, column square boxes 21, trailing arm mounting blocks 25, and vehicle body mounting blocks 24; the upright post base 23, the upright post gasket 22 and the upright post square box 21 are assembled into an independent upright post through bolts, and the fixing assembly 2 and the rear auxiliary frame 1 are installed by using bolts to install a longitudinal arm installation block 25 on the longitudinal arm 12 of the rear auxiliary frame 1, and a vehicle body installation block 24 is fixed on the installation point of the vehicle body lining 11 through bolts; the four upright posts are assembled, the car body mounting blocks 24 on the front side and the rear side are fixed at the appointed positions on the surface of the upright posts, the two fixing assemblies 2 on the right side of the rear auxiliary frame 1 and the two fixing assemblies 2 on the left side are mirror images of each other along a plane where the center of the rear auxiliary frame 1 is located, and the structure and the mounting mode are consistent. According to the position that test item stipulated, install four stands on the test bench with clamp plate and bolt, the fixed subassembly 2 of back sub vehicle frame 1 automobile body simulates back sub vehicle frame 1 and automobile body connected mode, and structural rigidity satisfies the automobile body rigidity requirement, makes the atress deformation condition of back sub vehicle frame 1 accord with the atress deformation condition in the real road driving process in the bench test process, imitates the test subassembly 3 of wheel center longitudinal force load and includes: the simple hub 33, the horizontal loading plate 311, the longitudinal joint 301, the end knuckle bearing 31, the actuator connecting rod 32, the hanging bracket and the steel wire rope, one end of the simple hub 33 is mounted on the steering knuckle 16 of the rear subframe 1 through bolts, the horizontal loading plate 311 is fixed on the other end through bolts, and the simple hub 33 is hung above the platform through the steel wire rope (not shown) fixed on the hanging bracket (not shown). After the longitudinal joint 301 is fixed at the wheel center loading position of the horizontal loading plate 311 by bolts, an actuator (not shown) is oriented and adjusted to be longitudinal (X direction), the actuator connecting rod 32 and the end joint bearing 31 are assembled in sequence, then the end joint bearing 31 and the longitudinal joint 301 are hinged, the right side test assembly 3 is installed to be the same as the left side, after mirror image assembly, the loading times, the running frequency and the force value of the servo actuator can be programmed, and horizontal longitudinal circulating force load or static load with a specified loading speed can be applied to the wheel center position of the rear auxiliary frame 1.

As shown in fig. 2 and 3, the present embodiment provides a rear subframe 1 test apparatus, a wheel ground point horizontal longitudinal (X-direction) and lateral (Y-direction) cyclic force load and static load bench test apparatus, a stationary assembly 2 mimicking a vehicle body comprising: a column base 23, column spacers 22, column square boxes 21, trailing arm mounting blocks 25, and vehicle body mounting blocks 24; the upright post base 23, the upright post gasket 22 and the upright post square box 21 are assembled into an independent upright post through bolts, and the fixing assembly 2 and the rear auxiliary frame 1 are installed by using bolts to install a longitudinal arm installation block 25 on the longitudinal arm 12 of the rear auxiliary frame 1, and a vehicle body installation block 24 is fixed on the installation point of the vehicle body lining 11 through bolts; the four upright posts are assembled, the car body mounting blocks 24 on the front side and the rear side are fixed at the appointed positions on the surface of the upright posts, the two fixing assemblies 2 on the right side of the rear auxiliary frame 1 and the two fixing assemblies 2 on the left side are mirror images of each other along a plane where the center of the rear auxiliary frame 1 is located, and the structure and the mounting mode are consistent. According to the position that test item prescribes, install four stands on the test bench with clamp plate and bolt, the fixed subassembly 2 of back sub vehicle frame 1 automobile body simulates back sub vehicle frame 1 and automobile body connected form, and structural rigidity satisfies the automobile body rigidity requirement, makes the atress deformation condition of back sub vehicle frame 1 accord with the atress deformation condition in the real road driving process in the bench test process, imitates the test subassembly 3 of wheel ground point longitudinal force and transverse force load and includes: the simple hub 33, horizontal loading plates 311 on the left and right sides, a longitudinal joint 301, a transverse joint 302, an end knuckle bearing 31, an actuator connecting rod 32, a hanger and a wire rope, one end of the simple hub 33 is mounted on the steering knuckle 16 of the rear subframe 1 by bolts, the other end is fixed with the horizontal loading plates 311 by bolts, and the simple hub 33 is suspended above the platform by the wire rope (not shown) fixed on the hanger (not shown). After the longitudinal joint 301 or the transverse joint 302 is fixed at the wheel grounding point loading position of the horizontal loading plate 311 by bolts, an actuator (not shown) is directed and adjusted to be longitudinal (X direction) or transverse (Y direction), the actuator connecting rod 32 and the end joint bearing 31 are assembled in sequence, then the end joint bearing 31 and the longitudinal joint 301 or the transverse joint 302 are hinged, the test assemblies 3 on two sides are installed, after the test devices are combined, the servo actuator can apply horizontal longitudinal or transverse circulating force load or static load with a specified loading speed to the wheel grounding point position of the rear auxiliary frame 1 according to the loading times, the running frequency and the force value set by programs.

As shown in fig. 4, the present embodiment provides a rear subframe 1 test apparatus, a wheel center vertical (Z-direction) cyclic force load and static load bench test apparatus, a stationary assembly 2 imitating a vehicle body, comprising: the fixing assembly 2 imitating a vehicle body includes: a column base 23, column spacers 22, column square boxes 21, trailing arm mounting blocks 25, and vehicle body mounting blocks 24; the upright post base 23, the upright post gasket 22 and the upright post square box 21 are assembled into an independent upright post through bolts, and the fixing assembly 2 and the rear auxiliary frame 1 are installed by using bolts to install a longitudinal arm installation block 25 on the longitudinal arm 12 of the rear auxiliary frame 1, and a vehicle body installation block 24 is fixed on the installation point of the vehicle body lining 11 through bolts; the four upright posts are assembled, the car body mounting blocks 24 on the front side and the rear side are fixed at designated positions on the surface of the upright posts, the two fixing assemblies 2 on the right side of the rear auxiliary frame 1 and the two fixing assemblies 2 on the left side are mirror images of each other along a plane where the center of the rear auxiliary frame 1 is located, and the structure and the mounting mode are consistent. According to the position that test item stipulated, install four stands on the test bench with clamp plate and bolt, the fixed subassembly 2 of back sub vehicle frame 1 automobile body simulates back sub vehicle frame 1 and automobile body connected mode, and structural rigidity satisfies the automobile body rigidity requirement, makes the atress deformation condition of back sub vehicle frame 1 accord with the atress deformation condition in the real road driving process in the bench test process, imitates the experimental subassembly 3 of wheel center vertical force load and includes: the simple hub 33, the vertical loading plate 312, the vertical joint 303, the end knuckle bearing 31, the actuator connecting rod 32, the hanger and the wire rope, one end of the simple hub 33 is mounted on the knuckle 16 of the rear subframe 1 through bolts, the other end of the simple hub 33 is fixed with the vertical loading plate 312 through bolts, and the simple hub 33 is suspended above the platform through the wire rope (not shown) fixed on the hanger (not shown). After fixing the vertical joint 303 at the wheel center loading position of the vertical loading plate 312 by bolts, the left actuator (not shown) is directed and adjusted to be vertical (Z direction), the actuator connecting rod 32 and the end joint bearing 31 are assembled in sequence, then the end joint bearing 31 and the vertical joint 303 are hinged, the two side test assemblies 3 are installed, after the test assemblies 3 are combined, the servo actuator can apply cyclic force load in the vertical direction or static force load with a specified loading speed to the wheel center position of the rear subframe 1 according to the loading times, the running frequency and the force value set by programs.

As shown in fig. 5, the present embodiment provides a test apparatus for a rear subframe 1, a test apparatus for a vertical (Z-direction) cyclic force load and a static load bench of a stabilizer bar 13, a fixing assembly 2 simulating a vehicle body, comprising: a column base 23, column gaskets 22, column square boxes 21, and a vehicle body mounting block 24; the upright post base 23, the upright post gasket 22 and the upright post square box 21 are assembled into an independent upright post sequentially through bolts, and the vehicle body mounting block 24 is fixed at a designated position on the surface of the upright post through bolts. Four posts were mounted to the test stand with clamps and bolts at the positions specified in the test project. The rear auxiliary frame 1 and the vehicle body fixing component 2 simulate the connection mode of the rear auxiliary frame 1 and the vehicle body, the structural rigidity meets the requirement of the vehicle body rigidity, and the stress deformation condition of the rear auxiliary frame 1 accords with the stress deformation condition in the real lane driving process in the bench test process. The test assembly 3, which mimics the wheel center vertical force load, comprises: stabilizer bar joint 304, end knuckle bearing 31, and actuator connecting rod 32. The method comprises the steps of installing a rear auxiliary frame 1 on a vehicle body fixing assembly 2 according to the opposite direction of real vehicle assembly, fixing a stabilizer bar joint 304 on an installation hole of a stabilizer bar 13 of the rear auxiliary frame 1 by bolts, adjusting the direction of an actuator (not shown) to be vertical (Z direction), sequentially assembling an actuator connecting rod 32 and an end joint bearing 31, hinging the end joint bearing 31 and the vertical joint 303, and installing test assemblies 3 on two sides in a consistent manner, wherein after the test devices are combined, the servo actuator can apply a circulating force load in the vertical direction or a static load with a specified loading speed to the wheel center position of the rear auxiliary frame 1 according to the loading times, the running frequency and the force value set by programs.

As shown in fig. 6, the present embodiment provides a rear subframe 1 test apparatus, an RDU bracket 308 vertical cyclic force load and static load bench test apparatus, a fixing assembly 2 imitating a vehicle body, comprising: a column base 23, column gaskets 22, column square boxes 21, and a vehicle body mounting block 24; the upright post base 23, the upright post gasket 22 and the upright post square box 21 are assembled into an independent upright post sequentially through bolts, and the vehicle body mounting block 24 is fixed at a designated position on the surface of the upright post through bolts. Four posts were mounted to the test stand with clamps and bolts at the positions specified in the test project. The four assembled automobile body fixing components are respectively fixedly mounted with four automobile body bushings 11 of the rear auxiliary frame 1, the automobile body fixing components 2 of the rear auxiliary frame 1 simulate the connection mode of the rear auxiliary frame 1 and an automobile body, the structural rigidity meets the automobile body rigidity requirement, and the stress deformation condition of the rear auxiliary frame 1 is enabled to be in line with the stress deformation condition in the real lane driving process in the bench test process. Test assembly 3, which mimics the vertical force loading of RDU bracket 308, includes: RDU joint 305, end knuckle bearing 31 and actuator connecting rod 32; the rear subframe 1 is mounted to the body fixing assembly 2 in the opposite direction of the actual vehicle assembly, the RDU joint 305 is fixed to the mounting hole of the RDU bracket 308 of the rear subframe 1 by bolts, an actuator (not shown) is oriented and adjusted to be perpendicular to the rear subframe 1, and the actuator connecting rod 32 and the end knuckle bearing 31 are assembled in this order, and then the end knuckle bearing 31 and the RDU joint 305 are hinged. After the test device is assembled, the servo actuator can apply a vertical cyclic force load or a static load with a specified loading speed to the RDU bracket 308 of the rear subframe 1 according to the loading times, the running frequency and the force value set by a program.

As shown in fig. 7, the present embodiment provides a rear subframe 1 test apparatus, a control arm bracket 14 bench test apparatus for lateral cyclic force load (rear subframe 1 preloaded with rubber bushings) and static load (rear subframe 1 without rubber bushings), a stationary assembly 2 mimicking a vehicle body, comprising: the upright post base 23, the upright post gasket 22, the upright post square box 21 and the vehicle body mounting block 24; the upright base 23, the upright gasket 22 and the upright square box 21 are assembled into an independent upright through bolts in sequence, the automobile body mounting block 24 is fixed at a designated position on the surface of the upright through bolts, the other side of the automobile body mounting block 24 is mounted on the automobile body lining 11 of the rear auxiliary frame 1, and the four uprights are mounted on a test bed through pressing plates and bolts according to the position specified by test items. The rear auxiliary frame 1 and the vehicle body fixing component 2 simulate the connection mode of the rear auxiliary frame 1 and the vehicle body, the structural rigidity meets the requirement of the vehicle body rigidity, and the stress deformation condition of the rear auxiliary frame 1 accords with the stress deformation condition in the real lane driving process in the bench test process. The test assembly 3, which mimics the lateral force load of the lower control arm support 14, comprises: control arm joint 306, bushing block 17 (for static test only to test structural strength), end knuckle bearing 31 and actuator connecting rod 32. The method comprises the steps of performing a lower control arm fatigue endurance test on a rear subframe 1 preloaded with rubber bushings according to the same direction of real vehicle assembly, performing a static test on the rear subframe 1 without the rubber bushings, mounting the rear subframe 1 on a vehicle body fixing assembly 2 by using two bushing fixing blocks 17 which are oppositely combined to replace the rubber bushings at the vehicle body bushing mounting positions of a vehicle body mounting block 24, fixing a control arm joint 306 on a rear lower control arm bracket 14 mounting hole of the rear subframe 1 by using bolts, adjusting the orientation of a left actuator (not shown) to be horizontal and transverse, sequentially assembling an actuator connecting rod 32 and an end joint bearing 31, hinging the end joint bearing 31 and the control arm joint 306, and applying a transverse cyclic force load or a static load with a specified loading speed on the rear lower control arm bracket 14 of the rear subframe 1 by using servo actuators according to the loading times, the running frequency and the force value set by programs after the test device is combined.

As shown in fig. 8, the present embodiment provides a test apparatus for a rear subframe 1, a test apparatus for a cyclic force load and a static load rack of a shock absorber bracket 15 in a space tilt direction, a fixing assembly 2 for simulating a vehicle body, comprising: a column base 23, column gaskets 22, column square boxes 21, and a vehicle body mounting block 24; the upright post base 23, the upright post gasket 22 and the upright post square box 21 are assembled into an independent upright post sequentially through bolts, and the front car body mounting block 24 and the rear car body mounting block 24 are fixed at appointed positions on the surface of the upright post through bolts. Four posts were mounted to the test stand with clamps and bolts at the positions specified in the test project. The rear auxiliary frame 1 and the vehicle body fixing component 2 simulate the connection mode of the rear auxiliary frame 1 and the vehicle body, the structural rigidity meets the requirement of the vehicle body rigidity, and the stress deformation condition of the rear auxiliary frame 1 accords with the stress deformation condition in the real lane driving process in the bench test process. The test assembly 3, which simulates the spatial tilt directional force load of a shock absorber, comprises: a shock absorber joint 307, an end knuckle bearing 31 and an elongated actuator connecting rod 32. The rear subframe 1 is mounted to the body fixing assembly 2 in the opposite direction of the real vehicle assembly, the damper joint 307 is fixed to the mounting hole of the damper bracket 15 of the rear subframe 1 by bolts, an actuator (not shown) is oriented to be adjusted to the space inclination direction, and the extension type actuator connecting rod 32 and the end joint bearing 31 are assembled in this order, and then the end joint bearing 31 and the damper joint 307 are hinged. The servo actuator is in the prior art, and after the test device is combined, the servo actuator can apply cyclic force load in the space inclination direction or static force load with a specified loading speed to the shock absorber bracket 15 of the rear auxiliary frame 1 according to the loading times, the running frequency and the force value set by a program.

The working principle of the utility model is as follows:

the column base 23, the column gasket 22 and the column square box 21 are assembled together to form a column. The trailing arm bracket mounting blocks 25, the body mounting blocks 24 can be fixed at designated positions of the columns in different combinations and directions according to the test project requirements. The rear auxiliary frame 1 is horizontally arranged on the fixed component 2 in the same or opposite direction of the real vehicle assembly, the fixed component 2 is arranged on the test bed through the pressing plate and the bolts, the auxiliary frame is tested, the fixed components 2 on the left side and the right side of the rear auxiliary frame 1 are mirror images of the test component 3, the structure and the position are the same, and the components are assembled in each embodiment.

In the first, second and third embodiments, the rear subframe 1 body is mounted on the fixed assembly 2 in the same direction as the real vehicle assembly, the simple hub 33, the horizontal loading plate 311, the longitudinal joint 301 and the transverse joint 302 are respectively connected with the knuckles 16 on the left and right sides of the rear subframe 1, the servo actuators transmit longitudinal cyclic force loads or static force loads to the wheel center of the rear subframe 1 through the actuator connecting rods 32 and the end knuckle bearings 31, and transmit longitudinal and transverse cyclic force loads or static force loads to the wheel center of the rear subframe 1, and the longitudinal fatigue endurance test and the structural strength test of the wheel center of the rear subframe 1, and the longitudinal and transverse fatigue endurance test and the structural strength test of the wheel center of the rear subframe 1 are completed through controlling the magnitude, the speed and the direction of force.

In the fourth embodiment, the rear subframe 1 is mounted on the fixed assembly 2 according to the same direction of the real vehicle assembly, the simple hub 33, the vertical loading plate 312 and the vertical joint 303 are respectively connected with the knuckles 16 on the left and right sides of the rear subframe 1, the servo actuator transmits the vertical circulating force load or static force load output by the servo actuator to the wheel center of the rear subframe 1 through the actuator connecting rod 32 and the end joint bearing 31, and the fatigue endurance test and the structural strength test in the vertical direction of the rear subframe 1 are completed by controlling the magnitude, the speed and the direction of the force.

In the fifth embodiment, the rear subframe 1 is mounted on the fixing assembly 2 in the opposite direction of the real vehicle assembly, the stabilizer bar joints 304 are respectively connected with the mounting holes at the tail ends of the stabilizer bars 13 of the rear subframe 1, the servo actuators transmit vertical cyclic force loads or static force loads to the stabilizer bars 13 through the actuator connecting rods 32 and the end joint bearings 31, and the fatigue endurance test and the structural strength test in the vertical direction of the stabilizer bars 13 are completed by controlling the magnitude, the speed and the direction of the force.

In the sixth embodiment, the rear subframe 1 is mounted on the fixed assembly 2 in the opposite direction of the real vehicle assembly, the RDU joint 305 is mounted on the RDU bracket 308 of the rear subframe 1, the servo actuator transmits the vertical cyclic force load or static force load to the RDU bracket 308 through the actuator connecting rod 32 and the end joint bearing 31, and the fatigue endurance test and the structural strength test in the vertical direction of the RDU bracket 308 are completed by controlling the magnitude, the speed and the direction of the force.

In the seventh embodiment, the rear subframe 1 is mounted on the fixing assembly 2 according to the same direction of the real vehicle assembly, the actuators, the actuator connecting rods 32 and the end joint bearings 31 are horizontally and transversely arranged, the rear lower control arm joints 306 are mounted on the left rear lower control arm support 14 of the rear subframe 1, the servo actuators transmit circulating force or static load to the rear lower control arm joints, the left rear lower control arm support 14 is stressed, and the rear lower control arm support 14 is subjected to transverse fatigue test and static force test (Y direction) to test the fatigue durability and structural strength of the rear lower control arm support 14.

In the eighth embodiment, the rear subframe 1 is mounted on the fixed assembly 2 in the opposite direction of the real vehicle assembly, the damper joint 307 is mounted on the damper bracket 15 of the rear subframe 1 in the spatial inclination direction specified in the test item, the servo actuator transmits the cyclic force load or the static force load to the damper bracket 15 through the actuator connecting rod 32 and the end joint bearing 31, and the fatigue endurance test and the structural strength test in the spatial inclination direction of the damper bracket 15 are completed by controlling the magnitude, the speed and the direction of the force.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The foregoing is merely illustrative of the structures of this utility model and various modifications, additions and substitutions for those skilled in the art can be made to the described embodiments without departing from the scope of the utility model or from the scope of the utility model as defined in the accompanying claims.

Claims (10)

1. The utility model provides a sub vehicle frame test device behind many connecting rods which characterized in that: the device comprises a fixing assembly and a test assembly, wherein the fixing assembly and the test assembly are detachably arranged on a rear auxiliary frame, the fixing assembly comprises a column base and a column square box, the column square box is detachably arranged on the column base, and one side of the column square box is detachably arranged with the rear auxiliary frame; the test assembly comprises a loading plate and an actuator connecting rod, wherein the actuator connecting rod is detachably connected with the loading plate, and the loading plate comprises a horizontal loading plate and a vertical loading plate.

2. The multi-link rear subframe testing apparatus of claim 1, wherein: the two fixing assemblies are arranged on the left side and the right side of the rear auxiliary frame respectively, and the two fixing assemblies are arranged in a mirror image mode by taking the center of the rear auxiliary frame as a symmetrical plane.

3. The multi-link rear subframe testing apparatus of claim 2, wherein: the rear auxiliary frame comprises a vehicle body bushing, a longitudinal arm, a stabilizer bar, a lower control arm bracket, a shock absorber bracket and a steering knuckle; the fixing assembly further comprises a vehicle body installation block and a trailing arm installation block, one sides of the vehicle body installation block and the trailing arm installation block are respectively and fixedly installed on the upright column square box, the other sides of the vehicle body installation block are installed on the vehicle body bushing through bolts, and the other sides of the trailing arm installation block are installed on the trailing arm through bolts.

4. A multi-link rear subframe test apparatus as claimed in claim 3, wherein: the test assembly comprises a simple hub, a horizontal loading plate, a longitudinal joint, an end joint bearing and an actuator connecting rod, wherein the simple hub is fixed on the steering knuckle, the horizontal loading plate is fixed on the simple hub, the longitudinal joint is fixed at one end of the horizontal loading plate, the longitudinal joint is located at one side of the horizontal loading plate away from the simple hub, the longitudinal joint is hinged with the end joint bearing, and the end joint bearing is detachably mounted with the actuator connecting rod.

5. A multi-link rear subframe test apparatus as claimed in claim 3, wherein: the test assembly comprises a simple hub, a horizontal loading plate, a transverse joint, an end joint bearing and an actuator connecting rod, wherein the simple hub is fixed on the steering knuckle, the horizontal loading plate is fixed on the simple hub, the transverse joint is fixed on the horizontal loading plate, the transverse joint is hinged with the end joint bearing, and the end joint bearing is detachably mounted with the actuator connecting rod.

6. A multi-link rear subframe test apparatus as claimed in claim 3, wherein: the test assembly comprises a simple hub, a vertical loading plate, a vertical joint, an end joint bearing and an actuator connecting rod, wherein the simple hub is fixed on the steering knuckle, the vertical loading plate is fixed on the simple hub, the vertical joint is fixed at one end of the vertical loading plate, the simple hub is suspended to a specified height by a steel wire rope fixed on a hanging bracket, so that the position of the auxiliary frame behind the wheel center is consistent with the specified load of the test, the vertical joint is hinged with the end joint bearing, and the end joint bearing is detachably mounted with the actuator connecting rod.

7. A multi-link rear subframe test apparatus as claimed in claim 3, wherein: the test assembly comprises a stabilizer bar connector, an end joint bearing and an actuator connecting rod, one end of the stabilizer bar connector is connected to a mounting hole at the tail end of the stabilizer bar, the other end of the stabilizer bar connector is hinged to the end joint bearing, and the end joint bearing is detachably mounted with the actuator connecting rod.

8. A multi-link rear subframe test apparatus as claimed in claim 3, wherein: the test assembly comprises an RDU connector, an end joint bearing and an actuator connecting rod, wherein the RDU connector is fixed on the rear auxiliary frame, the RDU connector is hinged with the end joint bearing, and the end joint bearing is detachably arranged with the actuator connecting rod.

9. A multi-link rear subframe test apparatus as claimed in claim 3, wherein: the test assembly comprises a lower control arm joint, an end joint bearing and an actuator connecting rod, wherein the lower control arm joint is fixed on the lower control arm support, the lower control arm joint is hinged with the end joint bearing, and the end joint bearing is detachably mounted with the actuator connecting rod.

10. A multi-link rear subframe test apparatus as claimed in claim 3, wherein: the test assembly comprises a shock absorber joint, an end joint bearing and an actuator connecting rod, wherein the shock absorber joint is fixed on the shock absorber support, the shock absorber joint is hinged with the end joint bearing, and the end joint bearing is detachably mounted with the actuator connecting rod.