阅读说明：本技术 一种轮边驱动总成 (Wheel edge driving assembly ) 是由 汪峰 周旭 于 2020-12-09 设计创作，主要内容包括：本发明公开了一种轮边驱动总成,涉及汽车零部件领域,包括驱动轴和轮毂单元,驱动轴通过支撑轴承支承在轮毂单元上,驱动轴上设有驱动轴齿轮用于带动从动齿轮旋转,从动齿轮上固装有齿轮轴,每一齿轮轴上套装有一只行星齿轮,各行星齿轮与太阳轮啮合组成行星齿轮系；太阳轮套装在轮毂单元上,并与轮毂单元法兰外表面的外花键啮合；轮毂单元的法兰盘引导端上同轴心安装有制动盘；轮毂单元安装在转向节上。本发明将减速机集成于总成内,通过二级减速进行稳定的传动减速；同时,轮毂电机轴承单元可承受最大扭矩≧800Nm,可有效增强减速器整体的传动性能,提高整体轮毂电机的寿命；总成整体结构体积更小,结构更为紧凑,便于后续与电机的装配。(The invention discloses a wheel-side driving assembly, which relates to the field of automobile parts and comprises a driving shaft and a hub unit, wherein the driving shaft is supported on the hub unit through a supporting bearing; the sun wheel is sleeved on the hub unit and is meshed with the external spline on the outer surface of the flange of the hub unit; a brake disc is coaxially arranged on the leading end of the flange plate of the hub unit; the hub unit is mounted on the knuckle. The speed reducer is integrated in the assembly, and stable transmission speed reduction is carried out through secondary speed reduction; meanwhile, the bearing unit of the hub motor can bear the maximum torque of not less than 800Nm, the integral transmission performance of the speed reducer can be effectively enhanced, and the service life of the integral hub motor is prolonged; the overall structure of the assembly is smaller in size and more compact in structure, and the assembly is convenient to assemble with a motor subsequently.)

1. A wheel limit drive assembly which characterized in that: the driving mechanism comprises a driving shaft (1) and a hub unit (6), wherein the driving shaft (1) is supported on the hub unit (6) through a supporting bearing (10), a driving shaft gear meshed with a driven gear (2) is arranged on the driving shaft (1) and used for driving the driven gear (2) to rotate, at least two gear shafts (5) are fixedly arranged on the driven gear (2) through deep groove ball bearings (9), the distance between the axis of each gear shaft (5) and the driving shaft (1) is equal, a planetary gear (3) is sleeved on each gear shaft (5), and each planetary gear (3) and a sun gear (4) are meshed to form a planetary gear train; the sun wheel (4) is sleeved on the hub unit (6) and is meshed with an external spline on the outer surface of a flange of the hub unit (6) to realize transmission; a brake disc (7) is coaxially arranged on the leading end of the flange plate of the hub unit (6) and is used for matching with a disc brake to realize the braking of the whole vehicle; the wheel hub unit (6) is installed on the steering knuckle (8) to realize the steering of the whole vehicle.

2. The wheel-drive assembly as set forth in claim 1, wherein: the number of teeth of the driving shaft is less than that of the driven gear (2), so that one-time speed reduction is realized; the number of teeth of the planetary gear (3) is less than that of the sun gear (4), so that secondary speed reduction is realized; the total reduction ratio of the two-stage speed reduction is 1-9.

3. The wheel-drive assembly as set forth in claim 1, wherein: the driven gear (2) is connected with the driving gear shaft (5) through a pin key on the gear shaft (5), and the gear shaft (5) is connected with the driving planetary gear (3) through the pin key.

4. The wheel-drive assembly as set forth in claim 1, wherein: the steering knuckle (8) integrates the shell of the speed reducer, and the motor is arranged on the other part of the shell of the speed reducer.

5. The wheel-drive assembly as set forth in claim 1, wherein: the internal spline of the sun gear (4) on the hub unit (6) is in rigid connection with the external spline on the outer surface of the flange.

6. The wheel-drive assembly as set forth in claim 1, wherein: and a heat radiation water jacket is arranged at the outer diameter of the hub unit (6).

Technical Field

The invention relates to the field of automobile parts, in particular to a wheel side driving assembly.

Background

The wheel edge drive adopts a mode of installing a wheel edge motor on the wheel edge to realize the independent drive of the wheel. The hub unit for the existing wheel-side motor can bear smaller torque, so that the transmission performance of the bearing unit is poor, and the service life of the bearing is shorter. Meanwhile, the existing wheel edge driving assembly is complex in structure, low in energy utilization rate, large in size and not beneficial to assembly of a motor.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a wheel-side driving assembly which has the advantages of compact structure, smaller volume and convenience in motor installation.

The purpose of the invention is achieved by the following technical scheme: the wheel edge driving assembly comprises a driving shaft and a hub unit, wherein the driving shaft is supported on the hub unit through a supporting bearing, a driving shaft gear meshed with a driven gear is arranged on the driving shaft and is used for driving the driven gear to rotate, at least two gear shafts are fixedly arranged on the driven gear through deep groove ball bearings, the distance between the axis of each gear shaft and the driving shaft is equal, a planetary gear is sleeved on each gear shaft, and each planetary gear is meshed with a sun gear to form a planetary gear train; the sun wheel is sleeved on the hub unit and is meshed with the external spline on the outer surface of the flange of the hub unit to realize transmission; a brake disc is coaxially arranged on the leading end of the flange plate of the hub unit and is used for realizing the braking of the whole vehicle by matching with a disc brake; the wheel hub unit is installed on the knuckle, and the steering of the whole vehicle is realized.

As a further technical scheme, the number of teeth of the driving shaft gear is smaller than that of the driven gear, so that one-time speed reduction is realized; the number of teeth of the planetary gear is smaller than that of the sun gear, so that secondary speed reduction is realized; the total reduction ratio of the two-stage speed reduction is 1-9.

As a further technical scheme, the driven gear is in key connection through a pin key on the gear shaft to drive the gear shaft, and the gear shaft is in key connection through the pin key to drive the planetary gear.

As a further technical scheme, the steering knuckle is integrated with a shell of a speed reducer, and the motor is installed on the other part of the shell of the speed reducer.

As a further technical scheme, an internal spline of the sun gear on the hub unit is in rigid connection with an external spline on the outer surface of the flange.

As a further technical scheme, a heat radiation water jacket is installed at the outer diameter of the hub unit.

The invention has the beneficial effects that: the speed reducer is integrated in the assembly, and stable transmission speed reduction can be performed through secondary speed reduction; meanwhile, the bearing unit of the hub motor can bear the maximum torque of not less than 800Nm, the integral transmission performance of the speed reducer can be effectively enhanced, and the service life of the integral hub motor is prolonged; the overall structure of the assembly is smaller in size and more compact in structure, and the assembly is convenient to assemble with a motor subsequently.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Description of reference numerals: the driving shaft 1, the driven gear 2, the planetary gear 3, the sun gear 4, the gear shaft 5, the hub unit 6, the brake disc 7, the steering knuckle 8, the deep groove ball bearing 9 and the support bearing 10.

Detailed Description

The invention will be described in detail below with reference to the following drawings:

example (b): as shown in fig. 1, the wheel-side driving assembly includes a driving shaft 1 and a hub unit 6, wherein the driving shaft 1 is supported on the hub unit 6 through a supporting bearing 10, a driving shaft gear meshed with a driven gear 2 is arranged on the driving shaft 1 and is used for driving the driven gear 2 to rotate, at least two gear shafts 5 (two in the embodiment) are fixedly arranged on the driven gear 2 through deep groove ball bearings 9 (which reduce radial load and stabilize the relative position of the driving shaft 1 in the transmission process), the driven gear 2 is connected with the gear shafts 5 through pin keys on the gear shafts 5 to drive the gear shafts 5, the distance between the axes of the gear shafts 5 and the driving shaft 1 is equal, each gear shaft 5 is sleeved with a planetary gear 3 (the gear shafts 5 are connected with the planetary gear 3 through the pin keys), and the planetary gears 3 are meshed with a sun gear 4 to form; the sun gear 4 is sleeved on the hub unit 6 and is meshed with the external spline on the outer surface of the flange of the hub unit 6 to realize transmission, so that the wheel is driven to move forward, and the sun gear is in rigid connection, so that the integral transmission performance of the speed reducer can be effectively enhanced, and the efficiency and the output response speed of the integral wheel-side motor are further improved; a brake disc 7 (providing accurate guidance for the rotation of the brake disc 7) is coaxially arranged at the leading end of a flange plate of the hub unit 6 and is used for realizing the braking of the whole vehicle by matching with a disc brake; the wheel hub unit 6 is mounted on a steering knuckle 8 and is used for transmitting and bearing wheel load, and can support and drive a wheel to rotate around a main shaft to enable an automobile to move forwards or backwards based on the high-rigidity design of the wheel hub unit, the steering knuckle 8 is integrated with a shell of a speed reducer, and a motor is mounted on the other part of the shell of the speed reducer. The load of the wheels is transmitted and borne, and the wheels are supported and driven to rotate around the main shaft, so that the automobile is steered. The number of teeth of the driving shaft is less than that of the driven gear 2, so that a primary speed reduction effect is achieved; the number of teeth of the planetary gear 3 is smaller than that of the sun gear 4, so that a secondary speed reduction effect is achieved; the total reduction ratio of the two-stage speed reduction is 1-9. The heat dissipation water jacket is arranged at the outer diameter of the hub unit 6, so that the service life of the hub unit is ensured, and the hub unit can be opened under extreme conditions to play a role in active heat dissipation.

The structure design of the invention improves the transmission efficiency by an integral sealing mode, removes the sealing elements of all bearings in the reducer, realizes the efficiency improvement by reducing the transmission mechanism, ensures that the whole steering system is not limited by the rotation angle of the constant-speed driving shaft any more due to the removal of the transmission shaft, can realize the rotation of 90 degrees, and provides possibility for the subsequent lateral movement and parking. In addition, the motor is arranged on the inner side of the steering knuckle, so that the arrangement of the brake disc and the calipers is not influenced, the arrangement can be well reserved, and the possibility of mechanical braking is realized. In addition, the overall structure of the assembly is smaller in size and more compact in structure, and the assembly is convenient to assemble with a motor subsequently.

The working process of the invention is as follows: when the hub unit 6 is mounted on the knuckle 8 and locked by bolts, the driven gear 2, the planetary gear 3, the sun gear 4 and the gear shaft 5 are mounted on the hub unit 6, the driving shaft 1 is supported on the hub unit 6 and meshed with the driven gear 2, then the hub unit is mounted on a connecting plate and locked by bolts, and finally the motor is mounted on the wheel edge. When the automobile steering device works, the driving shaft 1 is connected with the driving gear to drive the driven gear 2 to rotate through the driving shaft gear, the driven gear 2 drives each planetary gear 3 to rotate through the gear shaft 5, the planetary gears 3 drive the sun gear 4 to rotate while rotating around the sun gear 4, the sun gear 4 finally drives the hub unit 6 to rotate through spline transmission, and meanwhile, the hub unit 6 is installed on the steering knuckle 8 to transmit and bear the load of the automobile wheel and support and drive the automobile wheel to rotate around the main shaft to enable the automobile to steer.

Through the structural design, the obtained novel hub motor reducer can perform stable transmission speed reduction through two-stage speed reduction, is simple in structure, can effectively reduce unsprung mass, and provides help for driving stability and riding comfort. Meanwhile, the bearing unit of the hub motor can bear the maximum torque, and the integral power response performance of the speed reducer can be effectively enhanced. The configured hub unit has higher rigidity, can improve the stability of the contact of the gear, and prolongs the service life of a driving system. The overall structure volume of the assembly is smaller, and the driving and braking performance of the wheel edge assembly can be improved by combining the use of calipers.

It should be understood that equivalent substitutions and changes to the technical solution and the inventive concept of the present invention should be made by those skilled in the art to the protection scope of the appended claims.