Integrated electric drive axle

Abstract

The utility model discloses an integrated electric drive axle which comprises a motor shell used for supporting and limiting, a motor left end cover is fixedly arranged in the center of the side end face of the motor shell, and a middle connecting plate is arranged on the side portion of the motor left end cover. According to the transmission mode, energy consumption can be effectively reduced, resonance is reduced, safety performance is improved, the driving motor, the speed reduction system and the differential mechanism are integrated, the size is reduced, noise is reduced, the center gear can efficiently guarantee concentricity for a long time through the center gear bearing, operation is more stable, and the service life is prolonged. The premature wear of the center bearing caused by the conventional radial shearing force is avoided, and the service life of the whole equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electric drive axle equipment, in particular to an integrated electric drive axle. Background Art

[0002] Electric vehicles primarily use a motor to output power to a drive shaft, which then transmits it to a differential and ultimately to the wheels, driving the vehicle. This results in high energy consumption and a tendency to resonance. Currently, the most advanced technology uses in-wheel hub motors or wheel-side motors, which utilize chip differentials for cornering. However, these differentials are ineffective on uneven surfaces, easily causing the vehicle to roll over and resulting in a low safety factor. Therefore, an integrated electric drive axle is urgently needed to address these issues. Utility Model Content

[0003] The purpose of the present utility model is to provide an integrated electric drive axle to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an integrated electric drive axle, comprising a motor housing for supporting and limiting, a motor left end cover fixedly provided at the center of the side end surface of the motor housing, and a middle connecting plate provided on the side of the motor left end cover, a reduction gear housing fixedly provided on the side end surface of the middle connecting plate, a drive axle left end cover provided on the side end surface of the reduction gear housing, a motor right end cover provided at the side end surface of the motor housing away from the motor left end cover, and a drive axle right end cover provided at the center of the side end surface of the motor right end cover,

[0005] A hollow motor main shaft is provided at the center of the inner end surface of the motor housing, a central gear bearing is provided on the side of the hollow motor main shaft, and the hollow motor main shaft is fixedly connected with the central gear through the central gear bearing, a gear support shaft is provided on the side of the left end cover of the motor, and a combined toothed large gear is provided on the outer end surface of the gear support shaft, a combined toothed small gear is provided at the center of the outer end surface of the combined toothed large gear, and a support ring is provided on the outer end surface of the gear support shaft.

[0006] An inner ring gear is arranged on the inner end surface of the reduction gear housing near the combined gear pinion, a left differential case is arranged on one side of the inner end surface of the reduction gear housing, and a right differential case is arranged on the other side of the inner end surface of the reduction gear housing, a planetary gear half-shaft gear assembly is arranged on the inner end surfaces of the left differential case and the right differential case, a reduction gear bearing is arranged on the side of the left differential case, a first half-shaft is arranged at one end of the planetary gear half-shaft gear assembly, and a second half-shaft is arranged at the other end of the planetary gear half-shaft gear assembly.

[0007] Preferably, a shaft tube is provided at the center of the side end surface of the left end cover of the drive axle and the right end cover of the drive axle, and a leaf spring base is fixedly provided on the outer end surface of the shaft tube.

[0008] Preferably, the hollow motor main shaft, reduction gear housing, drive axle left end cover and drive axle right end cover are arranged in a straight line through the first half-shaft and the second half-shaft. The above-mentioned straight line arrangement makes the drive motor, reduction system and differential a trinity, which not only reduces the volume, but also reduces the noise, while also improving the stability of equipment operation.

[0009] Preferably, there are multiple groups of gear support shafts, and the gear support shafts are evenly distributed on the middle connecting plate. The side end centers of the gear support shafts are fixed by the support rings. The gear support shafts provide support and guarantee for the deceleration system of the electric vehicle, thereby improving the stability of subsequent operation.

[0010] Preferably, the hollow motor main shaft drives the combined tooth gear and the combined tooth pinion through the central gear to transmit the power, which can effectively improve the transmission stability and efficiency of the equipment.

[0011] Preferably, the combined gear pinion is meshedly connected with the inner ring gear, and the inner ring gear transmits power to the planetary gear half-shaft gear assembly through the left differential case and the right differential case, which can effectively enhance the torque output by subsequent equipment, thereby improving the starting and climbing strength of the electric vehicle.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] 1. The transmission method adopted by the utility model can effectively reduce energy consumption, reduce resonance, and improve safety performance. It integrates the drive motor, reduction system and differential into a trinity, which not only reduces the volume but also reduces noise. The center gear bearing can ensure the concentricity of the center gear for a long time and run more smoothly, avoiding the previous radial shear force that causes premature wear of the center bearing, thereby increasing the overall service life of the equipment.

[0014] 2. The utility model has a support shaft of a combined gear installed on the central connecting plate, which provides support for the deceleration system of the electric vehicle. The electric drive axle outputs power through the hollow gear shaft, and is decelerated by the central gear, the combined gear large gear, the combined gear small gear and the inner gear ring, so that the power can be output inside the drive axle, effectively enhancing the torque, making the electric vehicle more powerful when starting and climbing, and solving the shortcomings of traditional driving methods of vehicles. At the same time, the electric drive axle has good environmental protection and energy-saving performance.

[0015] 3. The support ring in the utility model has the function of supporting the combined gear support shaft, making the combined gear support shaft not easy to deform, twist and loosen, thereby increasing the service life of the electric drive axle of the electric vehicle, and can also synchronize the combined wheel deceleration with the differential, thereby improving the transmission efficiency, and at the same time making the power machine assembly more compact and reducing the space occupancy rate.

[0016] 4. The utility model has the advantages of low noise, low resonance, small size, higher energy saving and good safety performance. At the same time, the three-in-one structure of the drive motor, reduction system and differential can facilitate subsequent quick and convenient maintenance operations. During maintenance, the gear box housing and the connecting plate are separated, and then the accessories can be quickly and conveniently replaced, which effectively improves the convenience of subsequent inspection and maintenance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the main body of the utility model;

[0018] Figure 2 This is a schematic diagram of the transmission structure of the main body of the utility model;

[0019] Figure 3 This is the main power transmission flow chart of the utility model.

[0020] In the figure: 1-drive axle left end cover, 2-reduction gearbox housing, 3-intermediate connecting plate, 4-motor left end cover, 5-motor housing, 6-motor right end cover, 7-drive axle right end cover, 8-leaf spring base, 9-axle tube, 10-hollow motor main shaft, 11-center gear, 12-differential left housing, 13-gear support shaft, 14-combined gear large gear, 15-combined gear small gear, 16-support ring, 17-inner ring gear, 18-differential right housing, 19-reduction gearbox bearing, 20-center gear bearing, 21-planetary gear half-shaft gear assembly, 22-first half-shaft, 23-second half-shaft. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-3The present invention provides an embodiment of an integrated electric drive axle, comprising a motor housing 5 for support and position limiting, a motor left end cover 4 fixedly provided at the center of the side end face of the motor housing 5, and a middle connecting plate 3 provided on the side of the motor left end cover 4, a reduction gearbox housing 2 fixedly provided on the side end face of the middle connecting plate 3, a drive axle left end cover 1 provided on the side end face of the reduction gearbox housing 2, a motor right end cover 6 provided on the side end face of the motor housing 5 away from the motor left end cover 4, and a drive axle right end cover 7 provided at the center of the side end face of the motor right end cover 6,

[0023] The hollow motor main shaft 10 is arranged at the center of the inner end surface of the motor housing 5. A central gear bearing 20 is provided on the side of the hollow motor main shaft 10, and the hollow motor main shaft 10 is fixedly connected with the central gear 11 through the central gear bearing 20. A gear support shaft 13 is provided on the side of the left end cover 4 of the motor, and a combined tooth large gear 14 is provided on the outer end surface of the gear support shaft 13. A combined tooth small gear 15 is provided at the center of the outer end surface of the combined tooth large gear 14, and a support ring 16 is provided on the outer end surface of the gear support shaft 13.

[0024] The inner ring gear 17 is arranged on the inner end surface of the reduction gear housing 2 near the combined gear pinion 15, and the left differential housing 12 is arranged on one side of the inner end surface of the reduction gear housing 2, and the right differential housing 18 is arranged on the other side of the inner end surface of the reduction gear housing 2, the inner end surfaces of the left differential housing 12 and the right differential housing 18 are provided with a planetary gear half-shaft gear assembly 21, and the side of the left differential housing 12 is provided with a reduction gear bearing 19, one end of the planetary gear half-shaft gear assembly 21 is provided with a first half-shaft 22, and the other end of the planetary gear half-shaft gear assembly 21 is provided with a second half-shaft 23.

[0025] A shaft tube 9 is provided at the center of the side end surface of the left end cover 1 of the drive axle and the right end cover 7 of the drive axle. A leaf spring base 8 is fixedly provided on the outer end surface of the shaft tube 9.

[0026] The hollow motor main shaft 10, the reduction gear housing 2, the drive axle left end cover 1 and the drive axle right end cover 7 are arranged in a straight line through the first half-shaft 22 and the second half-shaft 23. The above-mentioned straight line arrangement makes the drive motor, reduction system and differential a trinity, which not only reduces the volume, but also reduces the noise, while also improving the stability of the equipment operation.

[0027] There are multiple groups of gear support shafts 13, and the gear support shafts 13 are evenly distributed on the middle connecting plate 3. The center of the side end of the gear support shaft 13 is fixed by a support ring 16. The gear support shaft 13 provides support and guarantee for the deceleration system of the electric vehicle, thereby improving the stability of subsequent operation.

[0028] The hollow motor main shaft 10 drives the combined tooth large gear 14 and the combined tooth small gear 15 through the central gear 11 to transmit the power, which can effectively improve the stability and efficiency of the transmission of the equipment.

[0029] The combined gear pinion 15 is meshed with the inner ring gear 17, and the inner ring gear 17 transmits power to the planetary gear half-shaft gear assembly 21 through the left differential case 12 and the right differential case 18, which can effectively enhance the torque output by subsequent equipment, thereby improving the starting and climbing strength of the tram.

[0030] Working principle: During power transmission, the hollow motor main shaft 10 is connected to the center gear 11, and then the power is transmitted to the inner ring 17 through the combined gear large gear 14 and the combined gear small gear 15, and then transmitted by the inner ring 17 to the left differential case 12 and the right differential case 18. Then the power passes through the planetary gear half-shaft gear assembly 21, and finally transmitted to the wheels through the first half-shaft 22 and the second half-shaft 23, thereby driving the vehicle to move. When internal components need to be replaced, just disassemble the reducer housing 2 and the center connecting plate 3, and then replace them.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated electric drive axle, comprising a motor housing (5) for supporting and limiting, a motor left end cover (4) fixedly provided at the center of the side end face of the motor housing (5), a middle connecting plate (3) provided at the side of the motor left end cover (4), a reduction gear housing (2) fixedly provided at the side end face of the middle connecting plate (3), a drive axle left end cover (1) provided at the side end face of the reduction gear housing (2), a motor right end cover (6) provided at the side end face of the motor housing (5) facing away from the motor left end cover (4), and a drive axle right end cover (7) provided at the center of the side end face of the motor right end cover (6), characterized in that: A hollow motor main shaft (10), the hollow motor main shaft (10) is arranged at the center of the inner end surface of the motor housing (5), a central gear bearing (20) is arranged on the side of the hollow motor main shaft (10), and the hollow motor main shaft (10) is fixedly connected to the central gear (11) through the central gear bearing (20), a gear support shaft (13) is arranged on the side of the left end cover (4) of the motor, and a combined toothed large gear (14) is arranged on the outer end surface of the gear support shaft (13), a combined toothed small gear (15) is arranged at the center of the outer end surface of the combined toothed large gear (14), and a support ring (16) is arranged on the outer end surface of the gear support shaft (13), An inner gear ring (17) is provided on the inner end surface of the reduction gear housing (2) near the combined gear pinion (15); a differential left housing (12) is provided on one side of the inner end surface of the reduction gear housing (2); and a differential right housing (18) is provided on the other side of the inner end surface of the reduction gear housing (2); a planetary gear half-shaft gear assembly (21) is provided on the inner end surfaces of the differential left housing (12) and the differential right housing (18); a reduction gear bearing (19) is provided on the side of the differential left housing (12); a first half-shaft (22) is provided at one end of the planetary gear half-shaft gear assembly (21), and a second half-shaft (23) is provided at the other end of the planetary gear half-shaft gear assembly (21).

2. The integrated electric drive axle according to claim 1, characterized in that: A shaft tube (9) is provided at the center of the side end surface of the left end cover (1) of the driving axle and the right end cover (7) of the driving axle, and a leaf spring base (8) is fixedly provided on the outer end surface of the shaft tube (9).

3. The integrated electric drive axle according to claim 2, characterized in that: The hollow motor main shaft (10), the reduction box housing (2), the drive axle left end cover (1) and the drive axle right end cover (7) are arranged in a straight line and pass through the first half shaft (22) and the second half shaft (23).

4. The integrated electric drive axle according to claim 2, characterized in that: The gear support shafts (13) are provided in multiple groups, and the gear support shafts (13) are evenly distributed on the middle connecting plate (3). The center of the side end of the gear support shaft (13) is fixed by the support ring (16).

5. The integrated electric drive axle according to claim 2, characterized in that: The hollow motor main shaft (10) drives the combined toothed large gear (14) and the combined toothed small gear (15) through the central gear (11) for transmission.

6. The integrated electric drive axle according to claim 5, characterized in that: The combined gear pinion (15) is meshedly connected with the inner ring gear (17), and the inner ring gear (17) transmits power to the planetary gear half-shaft gear assembly (21) through the differential left case (12) and the differential right case (18).

Images