CN202337181U

CN202337181U - Differential of wheel-hub motor driven vehicle

Info

Publication number: CN202337181U
Application number: CN201120383532XU
Authority: CN
Inventors: 魏海兵
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-10-11
Filing date: 2011-10-11
Publication date: 2012-07-18
Anticipated expiration: 2021-10-11

Abstract

The utility model relates to a differential of a wheel-hub motor driven vehicle. Motor shafts (rotors in motors) of wheel-hub motors are connected with semi-axles indirectly through universal joints or directly, the other end of each semi-axle is connected with a semi-axle gear indirectly through a telescopic universal joint or directly, the middle part of the left and the right semi-axle gears is meshed with a plurality of sun gears, the end of a sun gear shaft is fixed with a housing of the differential, and the housing of the differential is fixed with a frame. During straight going of the vehicle, the force acted by the semi-axle gears on the sun gears under the drive of the motor shafts of left and right wheels is the same in direction and equivalent in strength, then the motor shafts of the left and the right wheels can not rotate and are kept still as stators of the motors, and the wheels are taken as external rotors of the motors for rotating forwards so as to drive the vehicle to go forward. During turning of the vehicle, the rotational speed of the wheel on the inner side is reduced, the motor shaft of the wheel on the inner side can drive the semi-axle to rotate backwards, the sun gears are used for driving the semi-axle and the motor shaft on the outer side to perform equal-quantity forward rotation, and the wheel on the outer side can rotate forwards in an accelerated manner so as to realize differential and turning of the left and the right wheels.

Description

Wheel hub motor driving cars diff

Affiliated technical field

The utility model relate in the vehicular field a kind of be applicable to vehicle advance in the device of left and right wheels differential, especially replace " planet " gear and be applicable to the diff of wheel hub motor driving cars with " fixed star " gear.

Background technology

At present, the diff of known wheel hub motor powered vehicle is E-Diff, and left and right wheels is independently controlled, left and right wheels different rotating speed when turning with realization.The axletree (motor shaft) of present wheel hub motor driving cars is all fixed with vehicle frame or car body, and as the stator of wheel hub motor, and wheel is as the rotor of wheel hub motor.Use the vehicle of E-Diff that two big defectives are arranged: one, E-Diff complex structure, cost are very high, use the cost of the vehicle of E-Diff to improve greatly, make that the wheel hub motor actuation techniques can not popularization and application in low and middle-grade cars; Two, since use E-Diff the wheel hub motor driving cars about two wheels be independently, so about the energy of motor of two wheels can not share, when turning, have only the machine operation of single wheel, reduce the propulsive effort and the speed of Ackermann steer angle.

Summary of the invention

The deficiency that can not share for the complex structure, cost height and the left and right wheels energy that overcome existing wheel hub motor driving cars E-Diff; The utility model provides a kind of wheel hub motor driving cars mechanical speed difference device; This differential design is simple, cost is low; Can make the energy sharing of left and right wheels motor, can the energy transport of a side wheel hub motor be arrived opposite side, strengthen the propulsive effort and the turn inside diameter speed of opposite side wheel at Ackermann steer angle.

The utility model solves the technical scheme that its technical matters adopted: on the wheel hub motor driving cars axletree of the wheel of subsidiary wheel hub motor through universal-joint or directly be connected with semiaxis, the other end of semiaxis through flexible universal-joint or directly and axle side gear be connected, left and right sides axle side gear is middle to be meshed with several sun gears; The termination of sun gear axle and diff shell are fixed; Diff shell and car body are fixed, and the axletree of the wheel of subsidiary wheel hub motor is not fixed as the stator and the car body of motor, but can rotate simultaneously as the internal rotor and the motor outer rotor of motor; Wheel hub motor has inside and outside two rotors; Do not have the stator confirmed, inner and outer rotors is according to separately moving and quiet of the balance decision of strength, the gear wheel shaft of the sun gear that is meshed with axle side gear directly or indirectly and car body fix; Sun gear can only rotation; Can not revolve round the sun, the left and right sides axle side gear that is meshed with sun gear can not rotate simultaneously in the same way, simultaneously backward rotation.The wheel hub motor internal rotor promptly is the axletree of the wheel of motor shaft and subsidiary wheel hub motor in this programme, and wheel is fixed and driven to motor outer rotor and wheel.

The axletree (motor shaft) of the wheel of the subsidiary wheel hub motor of vehicle is not fixed as the stator of motor and the vehicle frame or the car body of vehicle; But it is rotary; And through universal-joint or directly (hang of looking wheel decide) and semiaxis are connected; The other end of semiaxis through flexible universal-joint or directly (hang of looking wheel decide) be connected with axle side gear, left and right sides axle side gear centre and several sun gears (can only rotation can not revolve round the sun) be meshed, sun gear axle head head and diff shell are fixed; Diff shell and vehicle frame or car body are fixed, perhaps with the termination of sun gear axle directly and car body fix.The whole formation of sun gear, sun gear axle, left and right sides axle side gear and shell " wheel hub motor driving cars diff ".The principle of work of this diff is: because the sun gear axle is direct or indirect and car body is fixed; So sun gear can and can only rotation with respect to car body (Here it is sun gear gain the name and be different from planetary reason place); The left and right sides axle side gear that is engaged in the sun gear both sides can only be done the oppositely directed rotation of equivalent; When acting on the identical equal and opposite in direction of force direction of left and right sides axle side gear; Owing to be limited by the fixed of sun gear axle,, and remain static so this moment, left and right sides axle side gear all can not rotate; When the both sides axle side gear is stressed when not waiting, the both sides axle side gear drives the both sides semiaxis and makes backward rotation.Principle according to above-mentioned " axle side gear of sun gear both sides does not change or oppositely changes "; When wheel hub motor energising Working vehicle was kept straight on, because ground-surface resistance, the axletree of the wheel of the subsidiary motor of both sides (motor shaft) drives the both sides semiaxis simultaneously and axle side gear rotates backward; Because the effect of sun gear; Make the both sides semiaxis not rotate backward simultaneously, so this moment, the both sides semiaxis was in dynamical equilibrium and transfixion, the axletree (motor shaft, motor internal rotor) that is connected with semiaxis is transfixion and as the stator of wheel hub motor also; Wheel (motor outer rotor) is compelled simultaneously rolls forward as rotor, drives vehicle and moves ahead.Work as Ackermann steer angle; Because the inboard wheel resistance is big, the outboard wheels resistance is little, and the vehicle wheel rotational speed of the side that resistance is big reduces; This sidecar wheel shaft this moment (motor shaft, motor internal rotor) drives semiaxis and rotates backward; And this sidecar wheel shaft can rotate forward through semiaxis and axletree equivalent that sun gear drives opposite side when rotating backward, thereby makes the wheel of opposite side quicken to rotate, and realizes the turning of the differential and the vehicle of left and right wheels thus.

The beneficial effect of the utility model is, simple in structure, cost is low, and the size of the application force that can receive according to left and right sides semiaxis makes the automatic differential of left and right wheels, also can make the energy of left and right wheels motor transmit each other and share.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

Accompanying drawing is the constructional drawing of the utility model.

The wheel of 1. subsidiary wheel hub motors among the figure, 2. axletree (motor shaft, motor internal rotor), 3. universal-joint, 4. semiaxis, 5. flexible universal-joint, 6. axle side gear, 7. sun gear axle, 8. sun gear, 9. diff shell, 10. vehicle frame.

The specific embodiment

In the drawings, the wheel (motor outer rotor) (1) of subsidiary wheel hub motor all can rotate with axletree (motor shaft, motor internal rotor) (2), and wheel links load-bearing through suspension and car body.Universal-joint (3), semiaxis (4), flexible universal-joint (5), axle side gear (6), sun gear (8) connect left and right wheels axle (motor shaft, motor internal rotor) (2); Make its mutual action;, vehicle reaches dynamical equilibrium when keeping straight on; Play the effect of motor stator, realize the purpose that vehicle moves ahead; At Ackermann steer angle, the energy transport of the motor of the side that resistance wheel is big reaches the effect of the wheel acceleration of the little side of resistance big single wheel reduction of speed, resistance to opposite side, realizes the purpose of turn inside diameter.Sun gear axle (7) directly or through diff shell (9) and vehicle frame (car body) (10) is fixed, and makes sun gear rotation can not revolve round the sun, and also makes the left and right sides axle side gear that is meshed with it can only make backward rotation simultaneously, and can not rotate in the same way simultaneously.In vehicle is advanced, the size of the application force that diff can receive according to left and right sides axle side gear, the energy of self-equalizing, conveying and shared both sides motor, and realize that vehicle keeps straight on and the purpose of turning flexibly.

Claims

1. wheel hub motor driving cars diff, the axletree of the wheel of subsidiary wheel hub motor are through universal-joint or directly be connected with semiaxis, and the other end of semiaxis is connected through flexible universal-joint or direct and axle side gear; Be meshed with several sun gears in the middle of the axle side gear of the left and right sides, the termination of sun gear axle and diff shell are fixed, and diff shell and car body are fixed; It is characterized in that: the axletree of the wheel of subsidiary wheel hub motor is not fixed as the stator and the car body of motor; But can rotate simultaneously as the internal rotor and the motor outer rotor of motor, wheel hub motor has inside and outside two rotors, does not have the stator of confirming; Inner and outer rotors is according to separately moving and quiet of the balance of strength decision; The gear wheel shaft of the sun gear that is meshed with axle side gear directly or indirectly and car body fix, sun gear can only rotation, can not revolve round the sun; The left and right sides axle side gear that is meshed with sun gear can not rotate simultaneously in the same way, simultaneously backward rotation.