Double-motor coaxial driving system for left and right wheel edges of pure electric vehicle

Abstract

The utility model discloses a pure electric vehicle left and right wheel double-motor coaxial driving system which comprises a first motor and a second motor which are located on the two sides of a hub, the first motor comprises a motor shell and a speed reducer shell, a motor rotating shaft is arranged in the motor shell, a speed reducing mechanism is arranged in the speed reducer shell, and the first motor and the second motor are arranged in the speed reducing mechanism. The motor rotating shaft is connected with the speed reducing mechanism, the speed reducing mechanism is connected with the hub rotating shaft, the second motor is the same as the first motor in structure, and a clutch mechanism is arranged between the speed reducing mechanism in the second motor and the hub rotating shaft, so that the occupied space is reduced, a larger battery is placed, and the continuation mileage is increased; due to the design of an integrated and coaxial structure, the appearance of the whole vehicle is more harmonious and attractive, the weight is light, the appearance is compact, a planetary reducer coaxial driving mode is adopted, and the efficiency is higher.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric drive technical field, more specifically relates to pure electric vehicle left and right wheel edge double motor coaxial drive system. BACKGROUND

[0002] With the development and popularization of automobile electric technology, electric technology also gradually expands to other fields, such as ship electrification, engineering machinery electrification, pure electric two-wheel and three-wheel motorcycle industry, and the previous electric drive is mostly applied to electric bicycles, light motorcycles and other small displacement vehicles in the motorcycle industry, and in recent years, electric drive technology is also gradually applied to large motorcycles.

[0003] In the electric drive field, the current common structure form has wheel hub motor and middle motor, etc., adopts wheel hub motor mode, although the structure is simple, but the weight of wheel hub motor is large, and the efficiency is low, not only affects the whole vehicle control performance, simultaneously increases material cost, and the waterproof sealing performance is poor, and the middle motor transmission path is long, and the limited battery space is occupied, and the whole vehicle range is reduced. UTILITY MODEL CONTENTS

[0004] In view of the deficiency of prior art, the utility model provides a pure electric vehicle left and right wheel edge double motor coaxial drive system, which occupies less space, can place larger battery to increase the range, the design of integration and coaxial structure, the appearance is more harmonious and beautiful, light in weight, compact in appearance, high in efficiency.

[0005] To achieve the above object, the utility model provides the following technical scheme: pure electric vehicle left and right wheel edge double motor coaxial drive system, including first motor and second motor located on both sides of wheel hub, the first motor includes motor casing and reducer casing, the motor casing is provided with motor rotating shaft, the reducer casing is provided with speed reducer mechanism, the motor rotating shaft is connected with speed reducer mechanism, the speed reducer mechanism is connected with wheel hub rotating shaft, the second motor structure is same with the first motor, and the speed reducer mechanism in the second motor is provided with clutch mechanism between wheel hub rotating shaft.

[0006] Further, the speed reducer mechanism includes central gear on the motor rotating shaft, a plurality of planetary gears and fixed gear ring on the inner wall of the reducer casing, a plurality of planetary gears are provided with support, and the planetary gear is rotatably connected with the support, the support on the first motor is connected with the wheel hub rotating shaft, the support on the second motor is provided with output shaft, and the output shaft is connected with the wheel hub rotating shaft through the clutch mechanism.

[0007] Further, the clutch mechanism includes clutch fixing sleeve and one-way bearing, the inner ring of one-way bearing is connected with wheel hub rotating shaft, and the outer ring of one-way bearing is connected with clutch fixing sleeve, and the clutch fixing sleeve is connected with the output shaft on the second motor.

[0008] Further, the clutch fixing sleeve is connected with the one-way bearing and the output shaft through the spline key, and the spline sleeve is provided with a locking screw.

[0009] Further, the clutch mechanism comprises a one-way bearing and a clutch driving rod, the clutch driving rod is rotationally connected with a clutch driving sleeve, the inner ring of the one-way bearing is connected with the hub shaft, the outer ring of the one-way bearing is connected with the clutch driving sleeve through the spline, the clutch driving sleeve is slidably connected with the output shaft of the second motor, and the clutch driving rod is connected with a driving mechanism.

[0010] Further, the output shaft is provided with a spline sleeve, the spline sleeve is connected with the output shaft through the spline key, the clutch driving sleeve is slidably connected with the spline sleeve through the spline, and the spline sleeve is provided with a locking screw.

[0011] Further, the clutch mechanism comprises a clutch driving rod, the clutch driving rod is rotationally connected with a clutch driving sleeve, the clutch driving sleeve is slidably connected with the hub shaft and the output shaft of the second motor, and the clutch driving rod is connected with a driving mechanism.

[0012] Compared with the prior art, the utility model has the advantages that: the utility model discloses two smaller wheel edge motors by dividing the conventional design of the middle motor or the hub motor, and the left and right double motors are arranged to make the vehicle weight distribution more reasonable, and the control performance is better, the middle motor occupies the vehicle space can be placed larger battery, increase the continuation mileage, reduce the performance caused by the increase of the rotational inertia of the hub motor, left and right independent drive and control can make the vehicle more in the power saving operation state, the integrated and coaxial structure design makes the vehicle appearance more harmonious and beautiful, light in weight, compact in appearance, adopt the planetary reducer coaxial drive mode, and the efficiency is higher. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structure schematic view of the left and right wheel edge double motor coaxial drive system of the pure electric vehicle of the utility model embodiment one.

[0014] Figure 2 It is a structure schematic view of the left and right wheel edge double motor coaxial drive system of the pure electric vehicle of the utility model embodiment two.

[0015] Figure 3 It is a structure schematic view of the first motor in the left and right wheel edge double motor coaxial drive system of the pure electric vehicle.

[0016] The figure marks: first motor 1, second motor 2, motor housing 3, reducer housing 4, motor rotating shaft 5, speed reduction mechanism 6, wheel hub rotating shaft 7, wheel hub 8, clutch mechanism 9, central gear 10, planetary gear 11, fixed gear ring 12, output shaft 13, clutch fixing sleeve 14, one-way bearing 15, clutch driving rod 16, clutch driving sleeve 17, spline sleeve 18, support 19. DETAILED DESCRIPTION

[0017] In the description of the utility model, it needs to be explained that for the orientation words, such as the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of narrating the utility model and simplifying the description, and cannot be understood as indicating or implying that the devices or elements indicated must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the utility model.

[0018] In addition, if the terms "first" and "second" are used for the purpose of description only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the "first" and "second" features defined can explicitly or implicitly include one or more features, and in the description of the utility model, the meaning of "several" and "several" is two or more than two, unless otherwise explicitly specified.

[0019] Reference Figures 1 to 3 Further description of the utility model.

[0020] Example one:

[0021] The pure electric vehicle left and right wheel edge double-motor coaxial driving system includes first motor 1 and second motor 2 located on both sides of wheel hub 8, first motor 1 includes motor housing 3 and reducer housing 4, motor rotating shaft 5 is arranged in motor housing 3, speed reduction mechanism 6 is arranged in reducer housing 4, motor rotating shaft 5 is connected with speed reduction mechanism 6, speed reduction mechanism 6 is connected with wheel hub rotating shaft 7, the structure of second motor 2 is same with first motor 1, and clutch mechanism 9 is arranged between speed reduction mechanism 6 in second motor 2 and wheel hub rotating shaft 7.

[0022] As Figure 1As shown in the preferred embodiment, the reduction mechanism 6 includes a central gear 10, a plurality of planetary gears 11, and a fixed gear ring 12 located on the inner wall of the reducer housing 4, with a bracket 19 provided between the plurality of planetary gears 11 and the planetary gears 11 being rotatably connected to the bracket 19. The bracket 19 on the first motor 1 is connected to the hub shaft 7, and the bracket 19 on the second motor 2 is provided with an output shaft 13, which is connected to the hub shaft 7 through a clutch mechanism 9.

[0023] Specifically, the rotation of the motor shaft 5 drives the planetary gear 11 to rotate around the center of the motor shaft 5, and outputs power through the connected bracket 19. That is, the bracket 19 of the first motor 1 is directly connected to the hub shaft 7, which directly drives the hub 8 to rotate.

[0024] Specifically, both the first motor 1 and the second motor 2 are connected to the vehicle frame.

[0025] like Figure 1 As shown in the preferred embodiment, the clutch mechanism 9 includes a clutch retaining sleeve 14 and a one-way bearing 15. The inner ring of the one-way bearing 15 is connected to the hub shaft 7, and the outer ring of the one-way bearing 15 is connected to the clutch retaining sleeve 14. The clutch retaining sleeve 14 is connected to the output shaft 13 on the second motor 2.

[0026] like Figure 1 As shown in the preferred embodiment, the clutch retaining sleeve 14 is connected to the one-way bearing 15 and the output shaft 13 by a flat key, and the spline sleeve 18 is provided with a set screw.

[0027] like Figure 1 As shown, the first motor 1 directly drives the hub 8 to rotate. Due to the setting of the one-way bearing 15, when the first motor 1 is running, it will not transmit power to the output shaft 13 of the reduction mechanism 6 of the second motor 2, thus preventing power loss and damage to the two motors. When the second motor 2 is required to participate in power output, the second motor 2 can transmit power to the hub shaft 7 through the one-way bearing 15, thereby realizing the power output of the two motors.

[0028] This invention utilizes a conventional design that divides the mid-mounted motor or hub motor into two smaller wheel-side motors. The dual-motor arrangement on the left and right sides results in a more reasonable weight distribution and better handling performance. It reduces the space occupied by the mid-mounted motor, allowing for a larger battery to be installed, increasing the driving range. It also reduces the performance degradation caused by the increased rotational inertia of the hub motor. Independent drive and control on both sides allows the vehicle to operate in a more energy-saving state. The integrated and coaxial structure design makes the vehicle's appearance more harmonious and aesthetically pleasing, lightweight, and compact. The use of a planetary reducer coaxial drive method results in higher efficiency.

[0029] Specifically, the positions of the first motor 1 and the second motor 2 can also be interchanged.

[0030] Specifically, under certain requirements, the one-way bearing 15 can be removed, so that the outputs of the first motor 1 and the second motor 2 can be directly connected to the hub shaft 7, that is, driven by the two motors simultaneously.

[0031] Example 2

[0032] The dual-motor coaxial drive system for the left and right wheels of a pure electric vehicle includes a first motor 1 and a second motor 2 located on both sides of a wheel hub 8. The first motor 1 includes a motor housing 3 and a reducer housing 4. A motor shaft 5 is disposed inside the motor housing 3, and a reduction mechanism 6 is disposed inside the reducer housing 4. The motor shaft 5 is connected to the reduction mechanism 6, and the reduction mechanism 6 is connected to the wheel hub shaft 7. The second motor 2 has the same structure as the first motor 1, and a clutch mechanism 9 is disposed between the reduction mechanism 6 in the second motor 2 and the wheel hub shaft 7.

[0033] like Figure 2 As shown in the preferred embodiment, the clutch mechanism 9 includes a one-way bearing 15 and a clutch drive rod 16. A clutch drive sleeve 17 is rotatably connected to the clutch drive rod 16. The inner ring of the one-way bearing 15 is connected to the hub shaft 7, and the outer ring of the one-way bearing 15 is connected to the clutch drive sleeve 17 via a spline. The clutch drive sleeve 17 is slidably connected to the output shaft 13 on the second motor 2. A drive mechanism is connected to the clutch drive rod 16.

[0034] Specifically, the driving mechanism can be an electric telescopic rod or a hydraulic telescopic cylinder, etc.

[0035] like Figure 2 As shown in the preferred embodiment, a spline sleeve 18 is provided on the output shaft 13, the spline sleeve 18 is connected to the output shaft 13 by a flat key, the clutch drive sleeve 17 is slidably connected to the spline sleeve 18 by a spline, and a set screw is provided on the spline sleeve 18.

[0036] like Figure 2 As shown, the first motor 1 directly drives the hub 8 to rotate. When the second motor 2 is not needed for driving, the clutch drive lever 16 moves to the right to drive the clutch drive sleeve 17 to separate the connection between the one-way bearing 15 and the output shaft 13 of the second motor 2. At this time, the hub shaft 7 is driven only by the first motor 1, and the one-way bearing 15 rotates freely on the hub shaft 7. When the second motor 2 needs to participate in driving, the clutch drive lever 16 moves to the left to drive the clutch drive sleeve 17 to connect the one-way bearing 15 and the output shaft 13 of the second motor 2. Then the second motor 2 is started, and the power can be transmitted to the hub shaft 7 through the one-way bearing 15. When the second motor 2 stops briefly, the power of the first motor 1 can be prevented from being transmitted to the second motor 2 through the one-way bearing 15.

[0037] The arrangement of the clutch driving rod 16 and the clutch driving sleeve 17 can completely disconnect the second motor 2 from the wheel hub rotating shaft 7 when the second motor 2 is not involved in driving for a long time, reduces the wear of the one-way bearing 15 caused by the long-time non-power output of the second motor 2, completely eliminates the slight rotation of the output shaft 13 of the second motor 2 between the inner and outer rings of the one-way bearing 15 caused by friction inertia or bearing friction, avoids any energy loss, improves the efficiency of the first motor 1, and directly disconnects the auxiliary motor when the auxiliary motor fails, avoids affecting the operation of the first motor 1, improves the system reliability, the combination of the two retains the one-way isolation advantage of the one-way bearing 15, and realizes the complete disengagement or participation of the auxiliary motor through the on-off of the clutch, thereby providing more comprehensive power management capability, and optimizing the efficiency, flexibility and safety.

[0038] Specifically, it can also be applied to the first motor 1 capable of reversing, and realizes reverse driving when the clutch driving sleeve 17 disconnects the one-way bearing 15 and the output shaft 13 of the second motor 2.

[0039] Other technical features are the same as those of Embodiment One.

[0040] Embodiment Three

[0041] The pure electric vehicle left and right wheel edge double-motor coaxial driving system comprises a first motor 1 and a second motor 2 located on both sides of a wheel hub 8, the first motor 1 comprises a motor shell 3 and a reducer shell 4, the motor shell 3 is provided with a motor rotating shaft 5, the reducer shell 4 is provided with a reduction mechanism 6, the motor rotating shaft 5 is connected with the reduction mechanism 6, the reduction mechanism 6 is connected with a wheel hub rotating shaft 7, the second motor 2 has the same structure as the first motor 1, and a clutch mechanism 9 is arranged between the reduction mechanism 6 in the second motor 2 and the wheel hub rotating shaft 7.

[0042] In the embodiment, the clutch mechanism 9 comprises a clutch driving rod 16, the clutch driving rod 16 is rotatably connected with a clutch driving sleeve 17, the clutch driving sleeve 17 is slidably connected with the wheel hub rotating shaft 7 and an output shaft 13 of the second motor 2, and a driving mechanism is connected to the clutch driving rod 16.

[0043] Other technical features are the same as those of Embodiment Two.

[0044] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments, and any technical solution falling within the concept of the present application belongs to the protection scope of the present application. It should be noted that for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principles of the present application can also be considered as the protection scope of the present application.

Claims

1. A pure electric vehicle left and right wheel edge dual-motor coaxial driving system, characterized in that: The application relates to a wheel hub motor, which comprises a first motor and a second motor located on both sides of the wheel hub, the first motor comprises a motor shell and a reducer shell, a motor rotating shaft is arranged in the motor shell, a reduction mechanism is arranged in the reducer shell, the motor rotating shaft is connected with the reduction mechanism, the reduction mechanism is connected with a wheel hub rotating shaft, the second motor has the same structure as the first motor, and a clutch mechanism is arranged between the reduction mechanism of the second motor and the wheel hub rotating shaft.

2. The pure electric vehicle left and right wheel dual-motor coaxial driving system according to claim 1, characterized in that: The reduction mechanism comprises a central gear on the motor rotating shaft, a plurality of planetary gears and a fixed gear ring on the inner wall of the reducer shell, the plurality of planetary gears are provided with a support, the planetary gears are rotationally connected with the support, the support on the first motor is connected with the wheel hub rotating shaft, an output shaft is arranged on the support of the second motor, and the output shaft is connected with the wheel hub rotating shaft through the clutch mechanism.

3. The pure electric vehicle left and right wheel dual-motor coaxial driving system according to claim 2, characterized in that: The clutch mechanism comprises a clutch fixing sleeve and a one-way bearing, the inner ring of the one-way bearing is connected with the wheel hub rotating shaft, the outer ring of the one-way bearing is connected with the clutch fixing sleeve, and the clutch fixing sleeve is connected with the output shaft on the second motor.

4. The pure electric vehicle left and right wheel dual-motor coaxial driving system according to claim 3, characterized in that: The clutch fixing sleeve is connected with the one-way bearing and the output shaft through a flat key.

5. The dual-motor coaxial drive system of claim 2, wherein: The clutch mechanism comprises a one-way bearing and a clutch driving rod, the clutch driving rod is rotationally connected with a clutch driving sleeve, the inner ring of the one-way bearing is connected with the wheel hub rotating shaft, the outer ring of the one-way bearing is connected with the clutch driving sleeve through a spline, the clutch driving sleeve is slidably connected with the output shaft on the second motor, and a driving mechanism is arranged on the clutch driving rod.

6. The dual-motor coaxial drive system of claim 5, wherein: A spline sleeve is arranged on the output shaft, the spline sleeve is connected with the output shaft through a flat key, the clutch driving sleeve is slidably connected with the spline sleeve through a spline, and a lock screw is arranged on the spline sleeve.

7. The dual-motor coaxial drive system of claim 2, wherein: The clutch mechanism comprises a clutch driving rod, the clutch driving rod is rotationally connected with a clutch driving sleeve, the clutch driving sleeve is slidably connected with the wheel hub rotating shaft and the output shaft on the second motor, and a driving mechanism is arranged on the clutch driving rod.

Images