CN-224231265-U - Transmission shaft dynamic torsion fatigue test stand

CN224231265UCN 224231265 UCN224231265 UCN 224231265UCN-224231265-U

Abstract

The utility model provides a dynamic torsion fatigue test bed for a transmission shaft, which is mainly used for solving the technical problem that the rotation states of an existing hydraulic torsion actuator and shaft parts in actual working conditions are different. The utility model relates to a dynamic torsion fatigue test bed for a transmission shaft, which comprises a first permanent magnet synchronous motor and a second permanent magnet synchronous motor, wherein torque output by the first permanent magnet synchronous motor is transmitted to one end of a shaft to be tested through a torque meter, an excess flange and a first spline housing, and torque is transmitted to the second permanent magnet synchronous motor through a second spline housing at the other end of the shaft to be tested. The entire test stand is rapidly switched between driving (positive torque) and braking (negative torque). The torque response of the first permanent magnet synchronous motor and the second permanent magnet synchronous motor is relatively fast, the torque response is close to the rotation state of shaft parts in actual working conditions, the torque alternating frequency is relatively high, the test time can be saved, and the research and development period is shortened.

Inventors

WANG BAOBIN
ZHANG MENGFENG
QIANG DENGKE
XU MINGZHONG
CHENG PAN

Assignees

陕西法士特齿轮有限责任公司

Dates

Publication Date: 20260512
Application Date: 20250606

Claims (5)

1. A transmission shaft dynamic torsion fatigue test bed is characterized in that: The device comprises a first permanent magnet synchronous motor (1), a torque meter (2), a first spline housing (4), a second spline housing (6), a second permanent magnet synchronous motor (7), a battery simulator (8) and an iron flat plate (13), and a first bracket bearing seat (9) and a second bracket bearing seat (11) which are sequentially and vertically arranged on the iron flat plate (13); The electric interface of the first permanent magnet synchronous motor (1) is connected with a battery simulator (8), the torque output shaft of the first permanent magnet synchronous motor (1) is connected with a first bearing on the first bracket bearing seat (9), and the first bearing is also connected with the input end of the torque meter (2); The output end of the torque meter (2) is coaxially connected with the input end of the first spline housing (4) and is used for measuring torque in the test process; The output end of the first spline housing (4) is coaxially connected with one end of a shaft (5) to be tested; The second permanent magnet synchronous motor (7) is arranged on a second bracket bearing seat (11), an electrical interface of the second permanent magnet synchronous motor (7) is connected with the battery simulator (8), a torque output shaft of the second permanent magnet synchronous motor (7) is connected with a second bearing on the second bracket bearing seat (11), and the second bearing is also coaxially connected with an input end of the second spline housing (6); the output end of the second spline housing (6) is coaxially connected with the other end of the shaft (5) to be tested.
2. The transmission shaft dynamic torsional fatigue test stand according to claim 1, wherein: Also comprises a transition flange (3); One end of the transition flange (3) is connected with the output end of the torque meter (2), and the other end of the transition flange is connected with the input end of the first spline housing (4).
3. The transmission shaft dynamic torsional fatigue test stand according to claim 2, wherein: The device also comprises a third bracket bearing seat (12) vertically arranged on the iron flat plate (13); The third support bearing seat (12) is provided with a third bearing and a connecting shaft arranged on the third bearing, one end of the connecting shaft is provided with an internal spline and is connected with an external spline of the transition flange (3) in a matched mode, and the other end of the connecting shaft is provided with end face teeth and is connected with end face teeth of the input end of the first spline housing (4) in a meshed mode.
4. A transmission shaft dynamic torsional fatigue test-bed according to any of claims 1-3, wherein: The device also comprises an inner tooth sleeve (10), wherein the shaft to be tested (5) comprises a main shaft to be tested and a shaft to be tested to accompany the main shaft to be tested; The output end of the first spline housing (4) is used for being connected to one end of a main shaft to be tested, and the output end of the second spline housing (6) is used for being connected to one end of the shaft to be tested; And the inner teeth at two ends of the inner gear sleeve (10) are respectively meshed with the outer teeth at the other end of the main test shaft and the outer teeth at the other end of the accompanying test shaft.
5. The dynamic torsional fatigue test stand for transmission shafts according to claim 4, wherein: The first permanent magnet synchronous motor (1) and the second permanent magnet synchronous motor (7) have the same structure, and the torque alternating frequency is 10000Nm/s at most.

Description

Transmission shaft dynamic torsion fatigue test stand Technical Field The utility model relates to a shaft torsional fatigue strength test bed, in particular to a transmission shaft dynamic torsional fatigue test bed. Background The electric logistics vehicle, the bus, the sanitation vehicle, the mine truck and other vehicles have obvious advantages in the popularization process of the electric vehicles because the transportation distance is relatively short and the requirement on the endurance mileage is not high. Under the braking condition of the new energy automobile, the automobile can feed back braking energy to the battery through the energy recovery system, and the motor can generate reverse torque. Such reverse torque can subject the driveline to alternating loads, thereby placing greater demands on the torsional fatigue strength of the transmission shaft-like components. Therefore, torsional fatigue strength has become a key indicator for measuring durability of new energy transmissions. At present, most of the shaft torsional fatigue strength tests in China adopt a hydraulic servo driving mode. The mode needs to be provided with auxiliary equipment such as a hydraulic station, and the like, so that the cost is high, and the energy consumption is high. Furthermore, there is a high risk of leakage of the oil pump and the hydraulic components. In the test process, the equipment fixes one end of the shaft part, the other end of the shaft part is connected with the torque adding device, and forward and reverse loading is carried out through the hydraulic torsion actuator. For example, chinese patent CN104515679a discloses a dynamic torsional fatigue test device for an automotive transmission shaft assembly, and its working principle is that forward and reverse loading is performed by a hydraulic torsional actuator. However, although the hydraulic torsion actuator can simulate the torsion fatigue test of shaft parts, the loading mode is different from the rotation state of the shaft parts in actual working conditions. Disclosure of utility model The utility model aims to solve the technical problem that the rotation states of the existing hydraulic torsion actuator and shaft parts in actual working conditions are different, and provides a dynamic torsion fatigue test bed for a transmission shaft. In order to solve the technical problems, the technical solution provided by the utility model is as follows: the utility model provides a derailleur axle class dynamic torsion fatigue test platform which characterized in that: The device comprises a first permanent magnet synchronous motor, a torque meter, a first spline housing, a second permanent magnet synchronous motor, a battery simulator, an iron plate, a first bracket bearing seat and a second bracket bearing seat which are sequentially and vertically arranged on the iron plate; The electric interface of the first permanent magnet synchronous motor is connected with the battery simulator, the torque output shaft of the first permanent magnet synchronous motor is connected with a first bearing on the first bracket bearing seat, and the first bearing is also connected with the input end of the torque meter; The output end of the torque meter is coaxially connected with the input end of the first spline housing and is used for measuring torque in the test process; The output end of the first spline housing is coaxially connected with one end of the shaft to be tested; The second permanent magnet synchronous motor is arranged on a second bracket bearing seat, an electric interface of the second permanent magnet synchronous motor is connected with the battery simulator, a torque output shaft of the second permanent magnet synchronous motor is connected with a second bearing on the second bracket bearing seat, and the second bearing is also coaxially connected with an input end of the second spline housing; And the output end of the second spline housing is coaxially connected with the other end of the shaft to be tested. Further, the device also comprises a transition flange; One end of the transition flange is connected with the output end of the torque meter, and the other end of the transition flange is connected with the input end of the first spline housing. Further, the device also comprises a third bracket bearing seat vertically arranged on the iron flat plate; The third support bearing seat is provided with a third bearing and a connecting shaft arranged on the third bearing, one end of the connecting shaft is provided with an internal spline and is connected with an external spline of the transition flange in a matched mode, and the other end of the connecting shaft is provided with end face teeth and is connected with end face teeth of the input end of the first spline housing in a meshed mode. The shaft to be tested comprises a main shaft to be tested and a shaft to be tested to accompany the main shaft to be tested; The output end of the first