Fatigue test device for automobile suspension system

Abstract

The utility model discloses a fatigue test device for an automotive suspension system. The fatigue test device comprises an automotive suspension, a simulation frame, a suspension drive loading unit, a suspension load simulation unit, a detection unit, an image collector, a detection table main console and a horizontal iron, the automobile suspension is an automobile rear suspension, and the simulation frame is a partial framework for connecting the automobile rear suspension system and the frame; the suspension drive loading unit drives a hub adapter in an automobile suspension to rotate; the suspension load simulation unit simulates different road conditions, a hub is applied to a hub adapter, and resistance and vibration of the road conditions are transmitted to a suspension through the hub adapter. The detection unit detects the deformation and fatigue degree of an automobile suspension, the detection unit and the image collector collect fatigue experiment data of all parts of a suspension system and test the fatigue strength of all the parts of the suspension, and the detection table main control table 7 can look up or output collected and recorded information through a displayer.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile parts testing equipment, and in particular relates to an automobile suspension system fatigue testing device. Background Art

[0002] As an important component of a car, the automobile suspension needs to be tested for reliability during the early stage of suspension design. At the same time, the automobile suspension also needs to be quality checked during the vehicle production process to test the reliability of the suspension. Fatigue testing of the automobile suspension system is also an indispensable link.

[0003] Currently, finite element analysis is used to perform idealized analysis on a computer during the early stages of product design. However, in actual application, different temperatures, production sites, and operator habits will all affect suspension manufacturing. In order to accurately determine the performance of the suspension system's suspension shock absorbers, it is necessary to simulate actual operating conditions on the vehicle suspension and conduct fatigue tests on the vehicle suspension system. Therefore, this technical solution provides a device for conducting fatigue tests on vehicle suspensions. Summary of the Invention

[0004] The present invention aims to solve the above problems and provides a vehicle suspension system fatigue test device.

[0005] A vehicle suspension system fatigue test device comprises: a vehicle suspension, a simulated vehicle frame, a suspension drive loading unit, a suspension load simulation unit, a detection unit, an image collector, a detection platform main console, and a ground iron. The vehicle suspension is a rear vehicle suspension, and a wheel hub adapter is provided in the vehicle suspension. The simulated vehicle frame is a partial structure connecting the rear vehicle suspension system and the vehicle frame. The suspension drive loading unit is provided with a first loader frame and a first loading motor. The suspension load simulation unit is provided with a working condition simulation frame, a linear motor, and a second loading motor. The first loader frame, the working condition simulation frame, the image collector, and the detection platform main console are fixed on the ground iron. The vehicle suspension is fixed to the first loader frame via the simulated vehicle frame. The first loading motor drives the wheel hub adapter to rotate. The second loading motor is vertically raised and lowered on the working condition simulation frame by the linear motor to simulate bumpy road conditions. The second loading motor simulates road friction resistance. The detection unit and the image collector are electrically connected to the detection platform main console via cables.

[0006] The automobile suspension is a rear automobile suspension; the automobile suspension includes: a fixing frame, a wheel hub adapter, a brake disc, a drive shaft, an upper A-shaped cantilever, a lower A-shaped cantilever, and a shock absorber frame; the drive shaft is connected to the wheel hub adapter; the brake disc is connected to the fixing frame through the wheel hub adapter shaft; the upper and lower ends of the fixing frame are respectively connected to the simulated vehicle frame through the upper A-shaped cantilever and the lower A-shaped cantilever; the front end of the lower A-shaped cantilever is connected to the simulated vehicle frame through the shock absorber frame.

[0007] The suspension drive loading unit includes: a loader frame, a first loading motor, a power output shaft, a first universal joint, and a load-bearing hydraulic push rod; the first loader frame is fixed on the ground iron, and the simulated frame and the first loading motor are fixed on the first loader frame; the power output by the first loading motor is loaded onto the wheel hub adapter through the power output shaft, the first universal joint and the transmission shaft in sequence; the load-bearing hydraulic push rod includes: a first load-bearing hydraulic push rod and a second load-bearing hydraulic push rod; the first load-bearing hydraulic push rod and the second load-bearing hydraulic push rod have the same structure; the first load-bearing hydraulic push rod and the second load-bearing hydraulic push rod are respectively fixed on both sides of the shock absorber frame; the first load-bearing hydraulic push rod and the second load-bearing hydraulic push rod respectively perform simulated load loading on both sides of the upper A-shaped cantilever arm.

[0008] The suspension load simulation unit includes: a working condition simulation frame, a linear motor, a lifting frame, a second loading motor, a torque sensor, a second universal joint, and a simulated wheel hub; a vertical vertical surface is provided on one side of the working condition simulation frame; the lifting frame is fixed to the vertical vertical surface of the working condition simulation frame via the linear motor; the second loading motor is fixed to the lifting frame; the second loading motor, the torque sensor, the second universal joint, and the simulated wheel hub are connected in sequence; and the simulated wheel hub is threadedly locked to the wheel hub adapter.

[0009] The detection unit includes: an axle displacement sensor, a suspension displacement sensor, a pressure sensor, and a brake disc displacement sensor; the axle displacement sensor is fixed on one side of the power output shaft, and the axle displacement sensor detects the power output shaft; the suspension displacement sensor is arranged between the upper A-shaped cantilever and the lower A-shaped cantilever, and the suspension displacement sensor detects the displacement of the shock absorber frame; the pressure sensor is arranged at the lower A-shaped cantilever; the pressure sensor detects the downward offset of the lower A-shaped cantilever under vehicle load; the brake disc displacement sensor is arranged next to the brake disc, and the brake disc displacement sensor detects the offset floating value of the disc surface when the brake disc is rotating.

[0010] The main control console of the test bench is an industrial computer. The first loading motor, the load-bearing hydraulic push rod, the linear motor, the second loading motor, the torque sensor, the detection unit, and the image collector are electrically connected to the main control console of the test bench through cables.

[0011] The present technical solution provides a fatigue test device for an automobile suspension system, which includes: an automobile suspension, a simulated frame, a suspension drive loading unit, a suspension load simulation unit, a detection unit, an image collector, a main control console of a detection platform, and a ground iron; the automobile suspension is the rear suspension of the automobile, and the simulated frame is a partial structure connecting the rear suspension system of the automobile and the frame; the suspension drive loading unit drives the wheel hub adapter in the automobile suspension to rotate; the suspension load simulation unit simulates the wheel hub under different road conditions and applies it to the wheel hub adapter, and the resistance and vibration of the road conditions are transmitted to the suspension through the wheel hub adapter; the detection unit detects the deformation and fatigue of the automobile suspension, the detection unit and the image collector collect fatigue test data of each component of the suspension system, and test the fatigue strength of each component of the suspension, and the main control console 7 of the detection platform can view or output the collected and recorded information through a display. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of a vehicle suspension system fatigue test device of the utility model;

[0013] Figure 2 This is a schematic diagram of the suspension structure of a vehicle suspension system fatigue test device of the utility model;

[0014] Figure 3 This is a schematic diagram of the fixing frame structure of a vehicle suspension system fatigue test device of the utility model;

[0015] Figure 4 This is a partial structural diagram of a vehicle suspension system fatigue test device of the utility model;

[0016] Figure 5 This is a schematic structural diagram of the suspension drive loading side of a vehicle suspension system fatigue test device of the utility model;

[0017] Figure 6 This is a schematic diagram of the structure of the suspension simulation loading side of a vehicle suspension system fatigue test device of the utility model;

[0018] Figure numerals: 11, fixing frame; 111, upper cantilever L-shaped connecting rod; 112, upper cantilever connecting shaft; 113, brake caliper fixing portion; 114, lower cantilever L-shaped connecting rod; 115, lower cantilever connecting shaft; 116, rotating shaft through hole; 12, wheel hub adapter; 13, brake disc; 14, transmission shaft; 141, transmission shaft dust cover; 15, upper A-shaped cantilever; 152, upper cantilever shaft connector; 16, lower A-shaped cantilever; 162, lower cantilever shaft connector; 163, shock absorber frame shaft connector; 17, shock absorber frame; 171, ball shaft; 173, shock absorber shaft seat; 2, simulation frame; 31, loader frame; 32, first loading motor; 33, power output shaft; 34, first universal joint; 35, load-bearing hydraulic push rod; 351. First load-bearing hydraulic push rod; 352. Second load-bearing hydraulic push rod; 41. Working condition simulation frame; 42. Linear motor; 421. Electric drive magnetic seat; 422. Guide rail; 424. Displacement grating; 43. Lifting frame; 44. Second loading motor; 45. Torque sensor; 46. Second universal joint; 47. Simulated wheel hub; 471. Wheel hub connection; 51. Shaft displacement sensor; 52. Suspension displacement sensor; 53. Pressure sensor; 531. Grating bar; 532. Load detection optical coupler; 54. Brake disc displacement sensor; 541. Sensor fixing frame; 542. Fixing rod; 543. Detection rod; 6. Image collector; 61. Collector fixing seat; 7. Main control console of detection platform; 8. Level iron. DETAILED DESCRIPTION

[0019] The technical solution will be further clearly and completely described below in conjunction with the accompanying drawings of the technical solution. The described embodiments are only a part of the technical solution, not all embodiments. Based on the technical solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this utility model.

[0020] Example 1

[0021] See also Figures 1 to 5 As shown, a vehicle suspension system fatigue test device includes: a vehicle suspension, a simulated frame 2, a suspension drive loading unit, a suspension load simulation unit, a detection unit, an image collector 6, a detection platform main console 7, and a ground level iron 8;

[0022] The automobile suspension is a rear automobile suspension; the automobile suspension includes: a fixing frame 11, a wheel hub adapter 12, a brake disc 13, a transmission shaft 14, an upper A-shaped cantilever 15, a lower A-shaped cantilever 16, and a shock absorber frame 17;

[0023] The top of the fixing frame 11 is provided with an upper cantilever L-shaped connecting rod 111, and the end of the upper cantilever L-shaped connecting rod 111 is provided with an upper cantilever connecting shaft 112; a brake caliper fixing portion 113 is provided on the side of the fixing frame 11; a lower cantilever L-shaped connecting rod 114 is provided below the fixing frame 11, and a lower cantilever connecting shaft 115 is provided at the end of the lower cantilever L-shaped connecting rod 114; a rotating shaft through hole 116 is provided in the middle of the fixing frame 11; the wheel hub adapter 12 is axially connected to the rotating shaft through hole 116; the brake disc 13 is fixed to the wheel hub adapter 12; one end of the transmission shaft 14 is fixedly connected to the wheel hub adapter 12;

[0024] The upper cantilever connecting shaft 112 is axially connected to the front end of the upper A-shaped cantilever 15; the lower cantilever connecting shaft 115 is axially connected to the lower A-shaped cantilever 16; upper cantilever shaft connecting seats 152 are provided on both sides of the rear end of the upper A-shaped cantilever 15; lower cantilever shaft connecting seats 162 are provided on both sides of the end of the lower A-shaped cantilever 16; a shock absorber shaft connecting end 163 is provided near the front end of the lower A-shaped cantilever 16;

[0025] The shock absorber frame 17 is a hook-shaped component, the lower end of which is connected to the shock absorber frame shaft connection end 163 via a ball shaft 171; a shock absorber spring 172 is provided in the middle of the shock absorber frame 17, and a shock absorber shaft seat 173 is connected to the top of the shock absorber frame 17;

[0026] The upper cantilever shaft connection seat 152, the lower cantilever shaft connection seat 162 and the shock absorber shaft seat 173 are respectively fixed to the simulation frame 2 by bolts.

[0027] The simulated frame 2 is a part of the real frame. The simulated frame 2 only uses a part of the frame cut from the real frame. The cut part is the part of the frame connecting the rear suspension system of the car and the frame. The simulated frame 2 can also use a structure similar to the real frame to connect the car suspension system.

[0028] The suspension drive loading unit includes: a loading machine frame 31, a first loading motor 32, a power output shaft 33, a first cardan shaft 34, and a load-bearing hydraulic push rod 35;

[0029] The first loader frame 31 is fixed to the ground iron 8 by T-bolts; the simulated vehicle frame 2 and the first loading motor 32 are fixed to the first loader frame 31; the electric spindle of the first loading motor 32 is connected to the power output shaft 33; the power output shaft 33 is connected to the transmission shaft 14 through the first cardan shaft 34; the first loading motor 32 simulates the vehicle gearbox output power, and the power output by the first loading motor 32 is loaded onto the wheel hub adapter 12 in sequence through the power output shaft 33, the first cardan shaft 34 and the transmission shaft 14; that is, the first loading motor 32 drives the wheel hub adapter 12;

[0030] The load-bearing hydraulic push rod 35 includes: a first load-bearing hydraulic push rod 351 and a second load-bearing hydraulic push rod 352; the first load-bearing hydraulic push rod 351 and the second load-bearing hydraulic push rod 352 have the same structure; the first load-bearing hydraulic push rod 351 and the second load-bearing hydraulic push rod 352 are respectively fixed on both sides of the shock absorber frame 17;

[0031] The first load-bearing hydraulic push rod 351 is provided with a first telescopic rod, and a first rubber head is provided at the end of the first telescopic rod; the second load-bearing hydraulic push rod 352 is provided with a second telescopic rod, and a second rubber head is provided at the end of the second telescopic rod; the first rubber head is against one side of the upper A-shaped cantilever 15 arm frame; the second rubber head is against the other side of the upper A-shaped cantilever 15 arm frame; that is, the first load-bearing hydraulic push rod 351 and the second load-bearing hydraulic push rod 352 respectively perform simulated load loading on both sides of the upper A-shaped cantilever 15 arm frame.

[0032] The suspension load simulation unit includes: a working condition simulation frame 41, a linear motor 42, a lifting frame 43, a second loading motor 44, a torque sensor 45, a second universal joint 46, and a simulation hub 47;

[0033] The working condition simulation frame 41 has a vertical vertical surface on one side, and a simulation frame fixing seat is provided at the bottom of the working condition simulation frame 41; the bottom of the simulation frame fixing seat is fixed to the horizontal iron 8 by T-bolts; the linear motor 42 is vertically fixed to the vertical vertical surface of the working condition simulation frame 41;

[0034] The linear motor 42 includes: an electric-driven magnetic base 421, a guide rail 422, and a sliding stator; two guide rails 422 are provided, and the two guide rails 422 are fixed on both sides of the electric-driven magnetic base 421; the sliding stator is sleeved on the guide rails 422; a displacement grating 424 is provided on one side of the electric-driven magnetic base 421; the sliding stator detects its movement offset through the displacement grating 424; the lifting frame 43 is fixed to the sliding stator; that is, the electric-driven magnetic base 421 drives the lifting frame 43 to rise and slide on the electric-driven magnetic base 421;

[0035] The second loading motor 44 is fixed to the lifting frame 43; the rotor shaft of the second loading motor 44 is connected to one side of a second universal joint 46 through a torque sensor 45; the other side of the second universal joint 46 is connected to a simulated wheel hub 47; the simulated wheel hub 47 is provided with a wheel hub connecting portion 471, which is fixed to the wheel hub adapter 12 by bolts;

[0036] The second loading motor 44 simulates the friction strength of the road surface; the linear motor 42 simulates the bumpy road surface; the linear motor 42 and the second loading motor 44 perform road condition simulation loading.

[0037] The detection unit includes: an axle displacement sensor 51, a suspension displacement sensor 52, a pressure sensor 53, and a brake disc displacement sensor 54;

[0038] The shaft displacement sensor 51 is fixed to one side of the power output shaft 33; the shaft displacement sensor 51 detects the displacement of the power output shaft 33 in the shaft rotation state;

[0039] The suspension displacement sensor 52 is arranged between the upper A-shaped cantilever 15 and the lower A-shaped cantilever 16, and the suspension displacement sensor 52 detects the displacement of the shock absorber frame 17;

[0040] The pressure sensor 53 includes: a grating bar 531 and a load detection optical coupler 532; the grating bar 531 and the load detection optical coupler 532 are used in conjunction with each other, and a magnetic seat is provided on the top of the grating bar 531. The grating bar 531 is fixed to the lower A-shaped cantilever 16 through its top magnetic seat; the load detection optical coupler 532 is sleeved on the grating bar 531; the pressure sensor 53 detects the downward displacement of the lower A-shaped cantilever 16 when the vehicle is loaded;

[0041] The brake disc displacement sensor 54 includes: a sensor fixing frame 541, a fixing rod 542, and a detection rod 543;

[0042] The brake caliper fixing portion 113 is originally a fixing portion of the brake caliper. In this detection device, the brake caliper is not installed, and the sensor fixing bracket 541 is fixed to the brake caliper fixing portion 113.

[0043] The fixing rod 542 is fixed to the end of the sensor fixing bracket 541; the other end of the fixing rod 542 is provided with a fixing rod hoop, and the detection rod 543 is sleeved in the fixing rod hoop; the detection head at the front end of the detection rod 543 contacts the end face of the brake disc 13; the brake disc 13 rotates with the wheel hub adapter 12, and the detection rod 543 detects the offset floating value of the disc surface when the brake disc 13 is in the rotating state; the rotation or stop of the hub adapter 12 is driven and controlled by the first loading motor 32 and the second loading motor 44.

[0044] The image collector 6 has a collector fixing seat 61 at the bottom, which is fixed to the ground iron 8 by T-bolts. The image collector 6 has a camera at the top, which records the detection process.

[0045] The main control console 7 of the testing platform is an industrial computer, which includes: a display, a keyboard, a main box, and a data collector. The display, keyboard, and data collector are controlled and connected to the main box; the main control console 7 of the testing platform is fixed at the corners of the horizontal iron 8; the data collector in the main control console 7 of the testing platform; the first loading motor 32, the load-bearing hydraulic push rod 35, the linear motor 42, the second loading motor 44, the torque sensor 45, the detection unit, and the image collector 6 are electrically connected to the data collector through cables; the main control console 7 of the testing platform can view or output the collected and recorded information through the display.

[0046] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A vehicle suspension system fatigue test device, comprising: Automobile suspension, simulation frame (2), suspension drive loading unit, suspension load simulation unit, detection unit, image acquisition device (6), detection platform main control console (7), and ground level iron (8); automobile suspension is automobile rear suspension, and a wheel hub adapter (12) is provided in the automobile suspension; the simulation frame (2) is a partial structure connecting the automobile rear suspension system and the frame; it is characterized in that: the suspension drive loading unit is provided with a first loader frame (31) and a first loading motor (32); the suspension load simulation unit is provided with a working condition simulation frame (41), a linear motor (42), a second loading motor (44), and a first loading motor (32). A loader frame (31), a working condition simulation frame (41), an image collector (6) and a main control console (7) of a testing platform are fixed on a ground iron (8); a vehicle suspension is fixed on the first loader frame (31) through a simulation frame (2); a first loading motor (32) drives a wheel hub adapter (12) to rotate; a second loading motor (44) is vertically raised and lowered on the working condition simulation frame (41) through a linear motor (42) to simulate a bumpy road condition; the second loading motor (44) simulates road friction resistance; and a detection unit and an image collector (6) are electrically connected to the main control console (7) of the testing platform through cables.

2. The vehicle suspension system fatigue testing device according to claim 1, characterized in that: The automobile suspension is a rear automobile suspension; the automobile suspension comprises: a fixing frame (11), a wheel hub adapter (12), a brake disc (13), a transmission shaft (14), an upper A-shaped cantilever (15), a lower A-shaped cantilever (16), and a shock absorber frame (17); the transmission shaft (14) is connected to the wheel hub adapter (12); the brake disc (13) is axially connected to the fixing frame (11) through the wheel hub adapter (12); the upper and lower ends of the fixing frame (11) are respectively connected to a simulated vehicle frame (2) through an upper A-shaped cantilever (15) and a lower A-shaped cantilever (16); and the front end of the lower A-shaped cantilever (16) is connected to the simulated vehicle frame (2) through the shock absorber frame (17).

3. The vehicle suspension system fatigue testing device according to claim 2, characterized in that: The suspension drive loading unit further comprises: a power output shaft (33), a first cardan shaft (34), and a bearing hydraulic push rod (35); the first loader frame (31) is fixed on the ground iron (8), the simulation frame (2) and the first loading motor (32) are fixed on the first loader frame (31); the power output by the first loading motor (32) is sequentially loaded onto the wheel hub adapter (12) through the power output shaft (33), the first cardan shaft (34) and the transmission shaft (14); the bearing The load-bearing hydraulic push rod (35) comprises: a first load-bearing hydraulic push rod (351) and a second load-bearing hydraulic push rod (352); the first load-bearing hydraulic push rod (351) and the second load-bearing hydraulic push rod (352) have the same structure; the first load-bearing hydraulic push rod (351) and the second load-bearing hydraulic push rod (352) are respectively fixed on both sides of the shock-absorbing frame (17); the first load-bearing hydraulic push rod (351) and the second load-bearing hydraulic push rod (352) respectively perform simulated load loading on both sides of the upper A-shaped cantilever (15) arm frame.

4. The vehicle suspension system fatigue testing device according to claim 3, characterized in that: The suspension load simulation unit further comprises: a lifting frame (43), a torque sensor (45), a second universal joint (46), and a simulated wheel hub (47); a vertical vertical surface is provided on one side of the working condition simulation frame (41); the lifting frame (43) is fixed to the vertical vertical surface of the working condition simulation frame (41) via a linear motor (42); a second loading motor (44) is fixed to the lifting frame (43); the second loading motor (44), the torque sensor (45), the second universal joint (46), and the simulated wheel hub (47) are connected in sequence; and the simulated wheel hub (47) is threadedly locked to the wheel hub adapter (12).

5. The automobile suspension system fatigue testing device according to claim 4, characterized in that: The detection unit comprises: an axial displacement sensor (51), a suspension displacement sensor (52), a pressure sensor (53), and a brake disc displacement sensor (54); the axial displacement sensor (51) is fixed on one side of the power output shaft (33), and the axial displacement sensor (51) detects the power output shaft (33); the suspension displacement sensor (52) is arranged between the upper A-shaped cantilever (15) and the lower A-shaped cantilever (16), and the suspension displacement sensor (52) detects the displacement of the shock absorber frame (17); the pressure sensor (53) is arranged at the lower A-shaped cantilever (16); the pressure sensor (53) detects the downward displacement of the lower A-shaped cantilever (16) under the vehicle load condition; the brake disc displacement sensor (54) is arranged beside the brake disc (13), and the brake disc displacement sensor (54) detects the displacement floating value of the disc surface of the brake disc (13) when the brake disc (13) is in a rotating state.

6. The automobile suspension system fatigue testing device according to claim 5, characterized in that: The main control console (7) of the detection platform is an industrial computer. The first loading motor (32), the load-bearing hydraulic push rod (35), the linear motor (42), the second loading motor (44), the torque sensor (45), the detection unit, and the image collector (6) are electrically connected to the main control console (7) of the detection platform through cables.

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