Double-motor step-by-step driving locking mechanism

Abstract

The invention discloses a dual-motor step-by-step driving locking mechanism, two locking gears of the locking mechanism are respectively arranged between the inner walls of output gears of two groups of reduction gear pairs of two distributed driving motors and output shafts and are provided with corresponding helical splines or helical gears for matching, and the outer walls of the output shafts are integrally provided with raised spring baffles; the two thrust springs are arranged between the spring baffle and the locking gear respectively, when the wheel on one side slips or is suspended, power can be transmitted to the wheel which does not slip or is suspended, and the problem that at the moment, power of one driving motor is insufficient is solved.

Description

Technical Field

[0001] The invention relates to the field of electric vehicle transmission. Background Art

[0002] In a dual-motor distributed drive, when the friction between one side of the wheel and the ground is small or the wheel is spinning in the air, the power of the other drive motor cannot be added to the drive. Summary of the invention

[0003] The solution to the problem that when the friction between one side of the wheels and the ground is small or the wheels are spinning in the air due to dual-motor distributed drive, the power of the other drive motor cannot be added to the drive is: two locking gears and two thrust springs are set, the two locking gears are in the shape of a circular tube, and the inner wall and outer wall of the circular tube are respectively set with helical splines or helical gears with the same rotation direction, and end face gears are set on the opposite end faces of the circular tube and mesh with each other. The two locking gears are respectively set between the inner walls of the output gears and the output shafts of the two groups of reduction gear pairs of the two distributed drive motors and are matched with corresponding helical splines or helical gears. A raised spring baffle is integrally set on the outer wall of the output shaft, and two thrust springs are respectively set between the spring baffle and the locking gear. When one side of the wheel slips or is suspended in the air, the power can be transmitted to the wheel that is not slipping or suspended in the air, thereby solving the problem of insufficient power of one drive motor at this time. BRIEF DESCRIPTION OF THE DRAWINGS

[0004] The present invention will be described by way of example with reference to the accompanying drawings, in which:

[0005] Figure 1 It is a partial cross-sectional view of the locking mechanism of Example 1 and its component views.

[0006] Markings in the figure: 2, motor, 3, output gear, 4, output shaft, 5, locking gear, 6, thrust spring, 7, helical spline, 8, end gear, 9, spring baffle. DETAILED DESCRIPTION

[0007] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0008] Any feature disclosed in this specification, unless otherwise stated, can be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0009] Examples, such as Figure 1As shown: two distributed drive motors (2) are used as power, and the locking mechanism is composed of two locking gears (5) and two thrust springs (6). The two locking gears (5) are in the shape of a circular tube, and the inner wall and the outer wall of the circular tube are respectively provided with helical splines (7) with the same rotation direction, and the end faces of the circular tube are provided with end face gears (8) that mesh with each other, and the end face gears (8) are radially distributed plane equal-height teeth with a pressure angle;

[0010] Two locking gears (5) are respectively arranged between the inner wall of the output gear (3) of the two groups of reduction gear pairs of the two distributed drive motors (2) and the output shaft (4) and are provided with corresponding helical splines (7) for cooperation; a raised spring baffle (9) is integrally provided on the outer wall of the output shaft (4); two thrust springs (6) are respectively arranged between the spring baffle (9) and the locking gear (5); and the axial movement distance of the locking gear (5) is equal to the height of the teeth of the end gear (8);

[0011] The working principle is as follows: when turning, the helical splines (7) on the two output shafts (4) generate an axial force due to the speed difference from the ground, so that the inner locking gear (5) moves axially alone and separates, and at the same time compresses the thrust spring (6) to achieve turning. In the dual-motor distributed drive, when the friction between the wheel on one side and the ground is small or the wheel is spinning, there is no axial force, and the end gears (8) of the two locking gears (5) are not separated. The power of the driving motor on the spinning side is transmitted to the wheel on the non-spinning side by the end gear (8). When reversing, there is no locking function but only a differential function. When the vehicle is already in a turning state and one side of the wheel is spinning, there is no axial force, and the thrust spring (6) will push the separated locking gear (5) back to the meshing state to achieve locking.

Claims

1. The dual-motor step-by-step drive locking mechanism includes: Two locking gears (5) and two thrust springs (6), characterized in that: the two locking gears (5) are in the shape of a circular tube, the inner wall and the outer wall of the circular tube are respectively provided with helical splines (7) or helical gears of the same rotation direction, the helical angle of the helical splines (7) or helical gears on the outer wall is approximately twice that of the helical splines (7) or helical gears on the inner wall, end face gears (8) are provided on the opposite end faces of the circular tube and directly mesh with each other, or intermediate gears are provided, the intermediate gears are in the shape of a disc, and end face gears (8) are provided on both sides of the disc and indirectly mesh with the two locking gears (5), and the end face gears (8) are radially distributed planar equal-height teeth with pressure angles; Two locking gears (5) are respectively arranged between the inner wall of the output gear (3) of the two groups of reduction gear pairs (17) of the two distributed drive motors (2) and the output shaft (4) and are provided with corresponding helical splines (7) or helical gears for matching; a raised spring baffle (9) is integrally provided on the outer wall of the output shaft (4); two thrust springs (6) are respectively arranged between the spring baffle (9) and the locking gear (5); and the axial movement distance of the locking gear (5) is equal to the height of the teeth of the end gear (8); The locking mechanism automatically realizes the separation and engagement of the locking gear (5) by the axial force generated by the helical spline (7) of the output gear (3) and the output shaft (4) without the need for control.

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