CN-121995213-A - Hub motor bench test device and method

CN121995213ACN 121995213 ACN121995213 ACN 121995213ACN-121995213-A

Abstract

The invention provides a hub motor bench test device and method, comprising an underframe component, a bearing seat component, a test spline sleeve, a connecting shaft, a floating component and a dynamometer, wherein the underframe component is used for installing a hub motor, the connecting shaft is rotatably installed on the bearing seat component, one end of the connecting shaft is connected with the test spline sleeve, the test spline sleeve is connected with the output end of the hub motor, the other end of the connecting shaft is connected with the floating component, and the floating component is connected with the dynamometer. The invention can solve the problem that the existing hub motor is easy to damage in the bench test process.

Inventors

YANG YUNWEI
XIA HAIFENG
CAO XIAO
CHEN YUANMING
ZHU JIEBIN
HU QIANG

Assignees

智新科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260228

Claims (10)

1. The hub motor bench test device is characterized by comprising an underframe assembly, a bearing seat assembly, a test spline housing, a connecting shaft, a floating assembly and a dynamometer; The chassis assembly is used for installing the wheel hub motor, the connecting axle rotates to be installed on the bearing frame assembly, the one end of connecting axle with the test spline housing is connected, the test spline housing with wheel hub motor's output is connected, the other end of connecting axle with the floating subassembly is connected, the floating subassembly is connected with the dynamometer.
2. The hub motor bench test device of claim 1, wherein the bearing seat assembly comprises a base, an adjusting flat key, a mounting seat and a fastener, the mounting seat is located on the base, a mounting groove for mounting the adjusting flat key is formed in the base, a sliding hole is formed in the mounting seat, the adjusting flat key is located in the mounting groove and is in sliding fit with the sliding hole along the axial direction of the connecting shaft, a shaft hole is formed in the mounting seat, the connecting shaft is rotatably mounted in the shaft hole, a fixing groove is formed in the mounting seat, and the fastener penetrates through the fixing groove and is detachably and fixedly connected with the base.
3. The in-wheel motor bench test apparatus of claim 1 wherein said bearing housing assembly is mounted on said chassis assembly.
4. The in-wheel motor bench test apparatus of claim 3, further comprising a fine adjustment assembly mounted on said chassis assembly for adjusting the position of said bearing housing assembly in a horizontal direction perpendicular to the axial direction of said connection shaft.
5. The in-wheel motor bench test device of claim 4, wherein the fine adjustment assembly comprises a fixed block and a fine adjustment screw, the fixed block is mounted on the chassis assembly, the fine adjustment screw is in threaded connection with the fixed block, and the fine adjustment screw is capable of abutting the bearing seat assembly.
6. The in-wheel motor bench test apparatus of claim 1, wherein the chassis assembly includes a bracket and a connection flange detachably mounted on the bracket, the connection flange for mounting the in-wheel motor.
7. The hub motor bench test device of claim 6 wherein said bracket defines a structural hole, said attachment flange having a structural protrusion, said structural protrusion engaging said structural hole.
8. The in-wheel motor bench test apparatus of claim 6 wherein said chassis assembly further comprises a large plate and a support column, said large plate being mounted on said support column, said bracket being mounted on said large plate.
9. The hub motor bench test device of claim 1 wherein the floating assembly comprises an output spline housing, a first universal joint, a drive shaft, a second universal joint and an input spline shaft, wherein one end of the drive shaft is connected with the output spline housing through the first universal joint, the output spline housing is connected with the connecting shaft, the other end of the drive shaft is connected with the input spline shaft through the second universal joint, and the input spline shaft is connected with the dynamometer.
10. A method of testing with the in-wheel motor bench test device according to any of claims 1-9, comprising: Mounting the hub motor on the chassis assembly; the testing spline housing is arranged at the output end of the hub motor; The connecting shaft is arranged on the bearing seat assembly, and one end of the connecting shaft is connected with the test spline housing; connecting the other end of the connecting shaft with the floating assembly; The floating assembly is connected with a dynamometer.

Description

Hub motor bench test device and method Technical Field The invention relates to the technical field of hub motor bench test, in particular to a hub motor bench test device and method. Background The hub motor is used as one of the core components of the electric automobile driving system, and the performance test of the hub motor is critical to the dynamic performance, the reliability and the durability of the whole automobile. For this reason, a single motor dynamometer bench has been developed in the prior art. The basic principle of the single-motor dynamometer rack is that an in-wheel motor is fixed through a rigid mounting bracket, and an output shaft of the motor is directly connected with a dynamometer (such as an eddy current type, magnetic powder type or electric feedback type dynamometer) through a high-speed high-torque coupler. The scheme is generally provided with a cooling simulation system to reproduce the air cooling or liquid cooling heat dissipation condition of the motor in actual work. However, the installation mode of the scheme is simpler, the suspension static state of the motor is mainly simulated, the motion state and the stress environment of the hub motor in a real vehicle suspension system are difficult to reflect, and the coverage range and the simulation degree of the test working condition are limited. In order to solve the problem that the coverage range and the simulation degree of the single-motor dynamometer rack test working condition are limited, a test rack integrating a half shaft or a wheel-side speed reducer is designed in the prior art. The test bench aims at being closer to the actual loading state, and the output torque of the hub motor is transmitted to the dynamometer through retaining or simulating transmission components such as a half shaft, a wheel-side speed reducer and the like of the original vehicle. Therefore, a special half-shaft fixing and centering tool is required to be designed so as to ensure accurate butt joint of the half-shaft spline and the output end of the motor, and the angle can be adjusted so as to simulate the working states of the universal joint under different working conditions. The dynamometer not only provides load torque, but also simulates inertia of the rotating component. Specifically, in the test bench of integrated semi-axis or wheel limit reduction gear, the floating connection structure that constitutes through universal joint and spline sleeve generally transmits power to adapt to the dynamic skew in the test process, although can compensate the axiality deviation of wheel hub motor's output shaft and the output shaft of dynamometer machine to a certain extent and bring relevant test problem, but because the operating mode is complicated changeable, wheel hub motor extremely easily takes place "sweep the bore (that is rotor and stator inner wall take place friction) serious mechanical failure, causes the model machine damage, not only brings economic loss, more seriously influences the research and development progress. Disclosure of Invention The invention aims to provide a hub motor bench test device and method, which are used for solving the problem that the existing hub motor is easy to damage in the bench test process. In order to solve the technical problems, the invention provides a hub motor rack testing device which comprises a chassis assembly, a bearing seat assembly, a testing spline housing, a connecting shaft, a floating assembly and a dynamometer, wherein the chassis assembly is used for installing a hub motor, the connecting shaft is rotatably installed on the bearing seat assembly, one end of the connecting shaft is connected with the testing spline housing, the testing spline housing is connected with the output end of the hub motor, the other end of the connecting shaft is connected with the floating assembly, and the floating assembly is connected with the dynamometer. Optionally, the bearing frame subassembly includes base, adjustment flat key, mount pad and fastener, the mount pad is located on the base, be provided with on the base and be used for installing the mounting groove of adjustment flat key, set up the hole that slides on the mount pad, the adjustment flat key be located in the mounting groove and with the hole that slides is followed the axial sliding fit of connecting axle, be provided with the shaft hole on the mount pad, the connecting axle rotates and installs in the shaft hole, the fixed slot has been seted up to the mount pad, the fastener passes the fixed slot with fixed connection can be dismantled to the base. Optionally, the bearing block assembly is mounted on the chassis assembly. Optionally, the device further comprises a fine adjustment assembly, wherein the fine adjustment assembly is installed on the underframe assembly and used for adjusting the position of the bearing seat assembly along the horizontal direction perpendicular to the axial direction of the connecting shaft