CN-121984276-A - Disconnected shaft type series double-motor driving assembly for mining wide-body vehicle

CN121984276ACN 121984276 ACN121984276 ACN 121984276ACN-121984276-A

Abstract

The invention discloses a disconnection shaft type series double-motor driving assembly for a mining wide-body vehicle, which comprises a main motor and an auxiliary motor which are oppositely arranged, wherein the main motor comprises a main motor rotor, a main motor stator and a main motor shaft, a first external spline is arranged at one end, close to the auxiliary motor, of the main motor shaft, the auxiliary motor comprises an auxiliary motor rotor, an auxiliary motor stator and an auxiliary motor shaft, a second external spline is arranged at one end, close to the main motor, of the auxiliary motor shaft, and a one-way locking ring type synchronous device is arranged between the main motor and the auxiliary motor and is only connected with the main motor shaft or is simultaneously connected with the main motor shaft and the auxiliary motor shaft under different working conditions. The invention not only can reduce the time for dragging the auxiliary motor when the main motor works, but also can improve the braking efficiency.

Inventors

ZHU YINGJIE
HU QICHAO
SONG DEBAO
CAO LEI
KANG DONGJIE

Assignees

徐州徐工重型车辆有限公司

Dates

Publication Date: 20260505
Application Date: 20260305

Claims (10)

1. The utility model provides a mining wide automobile-used disconnect shaft type tandem double motor drive assembly which characterized in that includes: The auxiliary motor comprises an auxiliary motor rotor, an auxiliary motor stator and an auxiliary motor shaft, wherein a second external spline is arranged at one end of the auxiliary motor shaft, which is close to the main motor, and a first external spline is arranged at one end of the auxiliary motor shaft; The unidirectional locking ring type synchronous device is arranged between the main motor and the auxiliary motor, and is connected with the main motor shaft only or connected with the main motor shaft and the auxiliary motor shaft at the same time under different working conditions.
2. The split shaft type tandem double motor driving assembly for the mining wide body vehicle, as set forth in claim 1, is characterized in that the one-way locking ring type synchronizing device comprises a spline hub, a joint sleeve, a sliding block spring assembly, a shifting fork and a locking ring; One side of the spline hub, which is close to the main motor, is provided with a check ring, and the other side of the spline hub is provided with no check ring, so that unidirectional limiting is realized; the spline hub comprises a spline hub, a first inner hole spline, a second outer spline, a first U-shaped groove, a second outer spline, a third outer spline, a first U-shaped groove, a second outer spline, a first connecting rod, a second connecting rod, a first connecting rod and a second connecting rod, wherein the inner wall of the spline hub is provided with the first inner hole spline along the circumferential direction, and the outer wall of the spline hub is provided with the third outer spline and the first U-shaped groove along the circumferential direction; the inner wall of the joint sleeve is provided with a second inner hole spline and a second U-shaped groove along the circumferential direction of the joint sleeve, the second U-shaped groove is matched with the first U-shaped groove, and an inner ring groove is also arranged at the second U-shaped groove; an outer ring groove is formed in the outer wall of the joint sleeve, and the outer ring groove is connected with an annular fork at the lower end of the shifting fork in a matched manner; the inner wall of the lock ring is provided with an inner conical surface, the outer wall of the lock ring is provided with a fourth external spline and a third U-shaped groove, and the third U-shaped groove is matched with the first U-shaped groove; The sliding block spring assembly comprises an annular sliding block and a tabletting spring, wherein the annular sliding block is installed in an accommodating cavity formed by the first U-shaped groove, the second U-shaped groove and the third U-shaped groove together, the tabletting spring is installed in the annular groove, an outer ring protrusion is arranged on the annular sliding block, and the outer ring protrusion is embedded into the inner ring groove under the action of the tabletting spring.
3. The split shaft type tandem double motor driving assembly for the mining wide body vehicle according to claim 2, wherein the second inner hole spline of the engagement sleeve is not engaged with the second outer spline of the auxiliary motor shaft under the light load or low torque working condition, and the main motor independently outputs torque.
4. The split shaft type tandem double-motor driving assembly for the mining wide-body vehicle according to claim 2, wherein under the heavy-load or high-torque working condition, the difference between the rotating speed of the auxiliary motor and the rotating speed of the main motor is controlled to be smaller than a set threshold value, and the shifting fork is utilized to drive the joint sleeve to move towards the auxiliary motor shaft until the second inner hole spline of the joint sleeve is meshed with the second outer spline of the auxiliary motor shaft, and the main motor and the auxiliary motor jointly provide torque output.
5. The split shaft tandem double motor drive assembly for a mining wide vehicle as set forth in claim 2, wherein the second female spline of the adapter sleeve does not engage the second male spline of the auxiliary motor shaft when the braking force demand is less than a set threshold, and wherein only the main motor provides the electric braking force.
6. The split shaft type tandem double motor driving assembly for the mining wide body vehicle according to claim 2, wherein when the braking force requirement is larger than a set threshold value, the second inner hole spline of the joint sleeve is meshed with the second outer spline of the auxiliary motor shaft, and the main motor and the auxiliary motor jointly provide electric braking force.
7. The split shaft type series double-motor driving assembly for the mining wide-body vehicle is characterized in that the number of the first U-shaped grooves, the second U-shaped grooves and the third U-shaped grooves is 2, the two first U-shaped grooves are uniformly arranged on the outer wall of a spline hub, the two second U-shaped grooves are uniformly arranged on the inner wall of a joint sleeve, the two third U-shaped grooves are uniformly arranged on the outer wall of a locking ring, the number of the sliding block spring assemblies is 2, and the sliding block spring assemblies are respectively arranged in a containing cavity formed by the first U-shaped grooves, the second U-shaped grooves and the third U-shaped grooves.
8. The split shaft type tandem double-motor driving assembly for the mining wide-body vehicle, which is disclosed in claim 2, is characterized in that a first chamfer is arranged at the tooth end of the second external spline, a second chamfer is arranged at the spline tooth end of the second inner hole spline of the joint sleeve, and a third chamfer is arranged at the tooth end of the fourth external spline of the lock ring; the structural dimensions of the first chamfer, the second chamfer and the third chamfer are all the same.
9. The disconnected shaft type series double-motor driving assembly for the mining wide-body vehicle according to claim 1, wherein the main motor is a radial flux motor, and the auxiliary motor is an axial flux motor.
10. The disconnected shaft type series double-motor driving assembly for the mining wide body vehicle according to claim 1, wherein the disconnected shaft type series double-motor driving assembly for the mining wide body vehicle further comprises a shell and at least 2 bearing seats, The shell is arranged outside the main motor, the unidirectional locking ring type synchronous device and the auxiliary motor, is of a three-section structure, and sequentially corresponds to the main motor, the unidirectional locking ring type synchronous device and the auxiliary motor and is used for supporting; And at least 2 bearing seats, each bearing seat is used for installing a bearing of the main motor or the auxiliary motor.

Description

Disconnected shaft type series double-motor driving assembly for mining wide-body vehicle Technical Field The invention belongs to the technical field of motors, and particularly relates to a disconnected shaft type series double-motor driving assembly for a mining wide vehicle. Background At present, the series double-motor driving assembly gradually becomes a research hot spot in the field of new energy automobiles by virtue of the characteristics of strong dynamic property, large energy saving potential, high transmission efficiency and the like. The traditional tandem double-motor driving assembly is fixedly connected with each other through the coaxial coupling mechanism, when the tandem double-motor driving assembly works, the main driving motor and the auxiliary motor power are subjected to coaxial torque coupling, and when the main driving motor works, the auxiliary motor is towed to work, so that the transmission efficiency is reduced. And the traditional tandem double-motor driving assembly mostly adopts radial flux motors, so that the axial dimension of the assembly is longer, and the arrangement flexibility is reduced. Aiming at the mining wide-body vehicle with new energy, the working condition is extremely complex and severe, the driving road surface is mostly a non-regular road surface temporarily paved in a mining area, is uneven and needs to go up and down slopes continuously. The mining wide-body vehicle is frequently loaded and unloaded to enable multiple surfaces of the mining wide-body vehicle to face heavy-load ascending and descending slopes, light-load ascending and descending slopes and other working conditions, so that the complex working conditions of a mining area provide a strict challenge for an electric drive assembly, and the electric drive assembly which has the advantages of high efficiency, energy saving, strong environmental adaptability and performance redundancy is required. The current situation of the serial double-motor driving assembly of the new energy vehicle, which is not limited to the mining wide vehicle, is described below, and the disconnection shaft type serial double-motor driving assembly for the mining wide vehicle is provided for the special working condition of the new energy mining wide vehicle on the basis. In the Chinese patent application with publication number of CN114811036A, a multi-mode double motor for electric automobile is disclosed, the invention is a double motor structure with motor rotor shafts connected in series, the main driving motor is connected with a first gear pair and a second gear pair to transmit power to wheels through a differential mechanism, the auxiliary driving motor drives a direct gear pair through a one-way clutch and then transmits power to the wheels through the differential mechanism, the main driving motor and the auxiliary driving motor can drive a vehicle independently or jointly transmit power to drive the wheels through power coupling, the vehicle has multiple working modes in operation, the motor can be operated in a high-efficiency area as much as possible through the switching of different working modes, the utilization rate of the motor is improved, the power redundancy on matching is avoided, and the two-gear gearbox is not power-interrupted in gear shifting. In the Chinese patent with publication number CN215850710U, a coaxial integrated double-motor double-speed-ratio electric drive assembly is disclosed, which comprises a first drive motor, a second drive motor, a first speed-ratio speed-reducing mechanism, a second speed-ratio speed-reducing mechanism and an intermediate shaft, wherein the first drive motor and the second drive motor are positioned on the same side of the first speed-ratio speed-reducing mechanism and the second speed-ratio speed-reducing mechanism, and the first drive motor and the second drive motor can be independently driven. It can be found that related schemes of tandem double-motor driving assemblies exist at present, the two motors are connected with different gears respectively through connecting a two-gear gearbox behind the double motors, and the two motors adopt radial flux motors, so that the axial dimension of the driving assembly is longer. Disclosure of Invention Aiming at the problems, the invention provides the disconnected shaft type tandem double-motor driving assembly for the mining wide-body vehicle, which not only can reduce the time for dragging the auxiliary motor when the main motor works, but also can improve the braking efficiency. In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme: the invention provides a disconnected shaft type series double-motor driving assembly for a mining wide-body vehicle, which comprises the following components: The auxiliary motor comprises an auxiliary motor rotor, an auxiliary motor stator and an auxiliary motor shaft, wherein a second externa