Background technology
Energy shortage and environmental pollution problems have become the subject matter of people's common concern in recent years, and soaring oil prices is a big factor of restriction people buying car, the electric automobile of exploitation zero discharge is one of important channel of head it off, at present, each automobile factory commercial city is at the research steps of accelerating electric automobile.
But the used type of drive of present most of electric automobile is concentrated motor-driven.And be not widely adopted as the wheel hub motor that industry is referred to as the final drive form of electric automobile, trace it to its cause, compare with centralized motor vehicle or traditional fuel combustion vehicle, adopt distributed wheel hub motor Drive Structure, though saved the gearbox of complicated heaviness, drive system such as power transmission shaft and differential mechanism, can improve transmission performance, optimize energy conversion ratio, but,, make the quality of wheel strengthen because wheel hub motor directly links to each other with wheel, and this part quality nonspring carried mass exactly, the increase of this part quality makes the vertical vibration amplitude of electric automobile increase, and directly has influence on the grounding characteristics of tire, be unfavorable for the dynamics Controlling of vehicle and the ride comfort that travels, feasible comfortableness by bus is also corresponding to be reduced.
Embodiment
Below in conjunction with accompanying drawing execution mode of the present utility model is elaborated.
Before being elaborated, at first need to prove, do not having under the situation of specified otherwise, " upper end " mentioned in the utility model claims and specification be meant along the flexible member end of (upside among Fig. 1) straight up, and " lower end " is meant along the flexible member end of (downside among Fig. 1) straight down.
According to a kind of execution mode of the present utility model, as shown in Figure 1, a kind of wheel hub motor syndeton, comprise: the internal stator 2 of wheel hub and wheel shaft 3 that links to each other with wheel hub and motor and the external rotor 5 that cooperates with internal stator 2, wherein, internal stator 2 has hollow structure, internal stator 2 is sleeved on the wheel shaft 3, external rotor 5 is connected with wheel hub, at least vertically is fixed with a flexible member in the hollow space of internal stator 2, and described flexible member contacts and support internal stator 2 with internal stator 2.
Further, also vertically be provided with a flexible member on the outer surface of internal stator 2, this flexible member lower end is connected with the outer surface of internal stator 2, and a boss for example is set on the outer surface of internal stator 2, and this flexible member is installed on the boss.The upper end of this flexible member can be connected with the chassis of vehicle, can be together in parallel with the original suspension system of vehicle like this, thereby better clamp and internal stator 2 is converted to spring carried mass by nonspring carried mass.
Motor comprises internal stator 2 and external rotor 5, and wherein internal stator 2 has hollow structure, so just internal stator 2 can be sleeved on the wheel shaft 3, and promptly wheel shaft 3 passes the center of internal stator 2 and is connected with wheel hub.
External rotor 5 is connected with wheel hub, for example can both be linked together by various suitable manner such as welding, bolt connections, external rotor 5 just can rotate together with wheel hub like this, rotates thereby drive the tire 1 that assembles with wheel hub, and then can drive wheels travel.
Because internal stator 2 has hollow structure, so brake 4 can be arranged in the internal stator 2, helps saving the space in the wheel hub; The clamp of brake 4 can be installed on the inwall of internal stator 2, and the clamp of brake 4 and internal stator 2 are converted to spring carried mass via the effect of flexible member with nonspring carried mass together like this.
In the hollow space of internal stator 2, can at least vertically fixedly install a flexible member.
According to a kind of execution mode of the present utility model, can a boss be set at least vertically on wheel shaft, boss can make progress, also can be downward.The length of boss can be shorter than flexible member, and flexible member is sleeved on the boss and with the inwall of internal stator 2 and contacts, and perhaps the inwall at internal stator 2 is provided with a recess, and flexible member can stretch into this recess.Boss can be for flexible, and boss also can play damping effect when boss and flexible member are isometric like this.
According to another kind of execution mode of the present utility model, an extension board is arranged on the wheel shaft horizontal direction, a boss at least vertically is set on this extension board, boss can make progress, also can be downward.The length of boss can be shorter than flexible member, and flexible member is sleeved on the boss and with the inwall of internal stator 2 and contacts, and perhaps the inwall at internal stator 2 is provided with a recess, and flexible member can stretch into this recess.Boss can be for flexible, and boss also can play damping effect when boss and flexible member are isometric like this.
In order to keep internal stator 2 stress balances, be preferably on the horizontal direction of the wheel shaft left and right sides and be provided with extension board, two boss are set respectively on the symmetric position of two extension boards, boss can make progress, also can be downward.The length of boss can be shorter than flexible member, and flexible member is sleeved on the boss and with the inwall of internal stator 2 and contacts, and perhaps the inwall at internal stator 2 is provided with a recess, and flexible member can stretch into this recess.Boss can be for flexible, and boss also can play damping effect when boss and flexible member are isometric like this.
Further, all be symmetrical arranged two boss up and down, 4 boss are so just arranged at two extension boards, equal suit one flexible member on each boss, flexible member contacts with inwall with internal stator 2, and perhaps the inwall at internal stator 2 is provided with a recess, and flexible member can stretch into this recess.Boss can be for flexible, and boss also can play damping effect when boss and flexible member are isometric like this.
Flexible member can comprise spring and damping; Also can be other various suitable elements that can play effectiveness in vibration suppression with spring function.
According to another kind of execution mode of the present utility model, centre position as flexible member on flexible member is provided with a motor or electro-motor, this motor or electro-motor can be regulated flexible member length according to the control signal that receives, thereby regulate the rigidity of flexible member and the effect of damping.So just can adapt to different pavement behavior, thereby improve the ride comfort of vehicle under different road conditions.This flexible member is flexible member in the internal stator 2 and/or the flexible member on internal stator 2 outer surfaces.
The utility model is by being provided with flexible member in the hollow space of internal stator 2, thereby make internal stator 2 and clamp be converted to spring carried mass by nonspring carried mass, thereby, adjusting device such as motor can carry out regulating automatically in real time to the rigidity and the damping of flexible member by being set on flexible member, improved the vertical vibration amplitude of wheel hub motor electric motor car greatly, the grounding characteristics of tire, be more conducive to the dynamics Controlling of vehicle and the ride comfort that travels, also can make comfortableness by bus improving.