CN-224231286-U - Novel commercial car electric power steering gear test bench

CN224231286UCN 224231286 UCN224231286 UCN 224231286UCN-224231286-U

Abstract

The utility model discloses a novel test bench for an electric power steering gear of a commercial vehicle, which is characterized by comprising a servo motor assembly, a torque transmission assembly and a mechanical support assembly, wherein the servo motor assembly comprises a servo motor and a multi-stage speed reducer, an output shaft of the servo motor is connected with an input end of the multi-stage speed reducer through a coupler, the torque transmission assembly comprises a tested electric power steering gear mounting bracket and an output shaft connecting flange, an output end of the multi-stage speed reducer is connected with an output shaft of the tested electric power steering gear through the output shaft connecting flange, the mechanical support assembly comprises a base frame, a vibration damper and an adjustable steering wheel bracket, the servo motor assembly, the tested electric power steering gear mounting bracket and the adjustable steering wheel bracket are fixed on the base frame, and the vibration damper is arranged at the bottom of the base frame.

Inventors

WANG MING
GUO YAO
HU YELIANG
YU ZHIPING
GUO XU
ZHU YANBIN
ZHANG DI
JIANG LI
MENG HAOJIE
ZHANG LE

Assignees

南京航智电动科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250606

Claims (10)

1. The utility model provides a novel commercial car electric power steering device test bench, its characterized in that includes servo motor assembly, moment of torsion transmission subassembly and mechanical support subassembly, servo motor assembly includes servo motor and multistage reduction gear, servo motor's output shaft passes through the input of shaft coupling with multistage reduction gear, moment of torsion transmission subassembly includes survey electric power steering device installing support and output shaft flange, multistage reduction gear's output passes through output shaft flange and survey electric power steering device's output shaft, mechanical support subassembly includes base frame, damping device and adjustable steering wheel support, fixed on the base frame servo motor assembly, survey electric power steering device installing support and adjustable steering wheel support, damping device sets up in the base frame bottom.
2. The novel commercial vehicle electric power steering gear test bench of claim 1, wherein the multi-stage reducer is fixedly mounted on the base frame by bolts.
3. The novel commercial vehicle electric power steering gear test bench according to claim 1, wherein the coupling is a diaphragm coupling, and two ends of the coupling are rigidly connected with an output shaft of the servo motor and an input shaft of the multi-stage reducer through flange plates respectively.
4. The novel commercial vehicle electric power steering gear test bench according to claim 1, wherein the tested electric power steering gear mounting bracket comprises a U-shaped clamp and a quick locking mechanism, and a rubber buffer pad is arranged on the inner side of the U-shaped clamp.
5. The novel commercial vehicle electric power steering gear test bench according to claim 1, wherein the adjustable steering wheel support comprises a sliding rail, a height adjusting rod and a clamp, wherein the sliding rail is horizontally arranged along the base frame, and the clamp is in sliding connection with the sliding rail through the height adjusting rod and is used for fixing steering wheels with different diameters.
6. The novel commercial vehicle electric power steering gear test bench according to claim 1, wherein the vibration damping device is a rubber vibration damping pad uniformly distributed at four corners of the base frame.
7. The novel commercial vehicle electric power steering gear test bench according to claim 1, wherein the output shaft connecting flange is a split flange and comprises a fixed flange and a movable flange, the movable flange is connected with the output shaft, and an anti-loosening pin is arranged between the movable flange and the output shaft.
8. The novel commercial vehicle electric power steering gear test bench of claim 1, wherein the base frame is welded from rectangular steel tubing.
9. The novel commercial vehicle electric power steering gear test bench according to claim 1, wherein the output end of the multi-stage speed reducer is provided with a torque sensor mounting interface for fixing an external torque sensor.
10. The novel commercial vehicle electric power steering gear test bench according to claim 1, wherein heat dissipation fins are arranged on two sides of the shell of the servo motor and are isolated from the base frame through heat insulation gaskets.

Description

Novel commercial car electric power steering gear test bench Technical Field The utility model relates to the technical field of steering gears, in particular to a novel test bench for an electric power steering gear of a commercial vehicle. Background The Electric Power Steering (EPS) system of the commercial vehicle is usually subjected to road test and bench test after the whole vehicle is assembled so as to verify the functions and reliability of the electric power steering system. The data such as steering torque, steering angle, response time and the like under the real road condition can be obtained through the real vehicle test, but the test period is long, the cost is high, and the operation and repetition are difficult under the limit or dangerous working condition. The existing commercial vehicle steering gear rack is mainly aimed at a hydraulic power-assisted or electrohydraulic power-assisted system, and a hydraulic motor or a motor and a damper are adopted to simulate ground resistance, so that the durability and reliability of the steering gear are tested. Part of early EPS racks only pay attention to endurance tests, and the instantaneous torque cannot be accurately controlled or measured by using a high-power motor and a simple friction load device, so that the test data are mostly average or limit endurance indexes. Although a small number of EPS functional racks are arranged on the passenger car, most of the EPS functional racks have limited output torque range, and are difficult to cover the working condition of large torque required by the commercial car. The boosting and correcting characteristics of the commercial vehicle EPS under the working conditions of high load and high torque are not provided with a special high-precision rack for quantitative calibration. Therefore, it is necessary to provide a novel test bench for an electric power steering gear of a commercial vehicle to solve the above technical problems. Disclosure of Invention This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the utility model and in the title of the utility model, which may not be used to limit the scope of the utility model. The present utility model has been made in view of the above-described problems occurring in the prior art. The technical scheme is that the novel commercial vehicle electric power steering device testing rack is characterized by comprising a servo motor assembly, a torque transmission assembly and a mechanical support assembly, wherein the servo motor assembly comprises a servo motor and a multi-stage speed reducer, an output shaft of the servo motor is connected with an input end of the multi-stage speed reducer through a rigid coupling, the torque transmission assembly comprises a tested electric power steering device mounting bracket and an output shaft connecting flange, an output end of the multi-stage speed reducer is rigidly connected with a tested output shaft through the output shaft connecting flange, and the mechanical support assembly comprises a base frame, a vibration reduction device and an adjustable steering wheel bracket, wherein the servo motor assembly, the tested EPS mounting bracket and the adjustable steering wheel bracket are fixed on the base frame, and the vibration reduction device is arranged at the bottom of the base frame. As an optimal scheme of the novel commercial vehicle electric power steering gear test bench, the multistage speed reducer is fixedly arranged on the base frame through bolts. As an optimal scheme of the novel commercial vehicle electric power steering gear test bench, the rigid coupler is a diaphragm coupler, and two ends of the rigid coupler are respectively and rigidly connected with an output shaft of a servo motor and an input shaft of a multi-stage speed reducer through a flange plate. As an optimal scheme of the novel commercial vehicle electric power steering gear test bench, the tested EPS mounting bracket comprises a U-shaped clamp and a quick locking mechanism, and a rubber buffer pad is arranged on the inner side of the U-shaped clamp. As an optimal scheme of the novel commercial vehicle electric power steering gear test bench, the adjustable steering wheel support comprises a sliding rail, a height adjusting rod and a clamp, wherein the sliding rail is horizontally arranged along a base frame, and the clamp is in sliding connection with the sliding rail through the height adjusting rod and is used for fixing steering wheels with different diameters. As an optimal scheme of the novel commercial vehicle electric power steering gear test bench, the vibration reduction devices are rubber vibration reduction pads and are uniformly distributed at four corners of the base frame. As an optimal scheme of the novel commercial vehicle electric power st