CN201038906Y - Eccentric wheel hub motor - Google Patents

Abstract

An eccentric-type wheel hub motor mainly comprises a motor body and a wheel frame, the motor body comprises a magnetic motor frame, the interior of the motor frame is combined with a stator and a reducing mechanism, the centers of two sides of the motor frame respectively extends to form a fixed shaft, a brake is combined on the fixed shaft at one side of the motor frame, and the fixed shaft thereof is connected with a fork-shaped steering support; the wheel frame is combined outside the motor frame in an eccentric mode, a central line of the wheel frame is corresponding to a central shaft of the steering support, then the wheel frame is near to one side of the wheel frame which is combined with the brake, so as to effectively solve the problem of unbalanced rotation physical quantity, effectively reduce the length of the fixed shaft and lower the mechanism and the appearance design difficulty.

Description

The centering type hub motor

Technical field

The utility model is about a kind of centering type hub motor, be meant especially and a kind of the tire center line separated with motor turning rack center line, to solve the unbalanced problem of Rotation Physics amount, in the hub-type motor that the brake brake is arranged, more can effectively reduce unnecessary fixedly axle center length, reduce the centering type hub motor of mechanism and appearance design difficulty.

Background technology

In recent years because the tight supplies of fossil energy, and the lifting of environmental protection demand, have the electric motor car exploitation of high-energy source transformation efficiency, the importance that grows with each passing day is also arranged in industrial development.Hub-type (rim type) motor is considered to the most suitable medium and small electric wheel application that is used in because there is not the friction loss of transmission.As shown in Figure 1; be to be traditional hub-type motor; under the theory of simple designs; the center line 111 of the wheel frame 11 of hub-type motor is normal consistent with motor body 1 center line; but because motor body 1 internal structure is often because of the electrode outlet; or the consideration of reduction gearing 12; the mass distribution of the rotating part on fixed axis 13 is also uneven; have on the mechanism design of motor turning rack 14 rotations at some; front fork as electric motor car; regular meeting is because such mass distribution inequality; cause the both sides of turning rack axle 141 unbalanced torque demand to occur; such moment of torsion is to come from moment of inertia center 15 (Moment of Inertia) or so-called angular momentum constant (Constant of angular momentum); and then formation centre bearing or pearl bowl eccentric force; cause axle singularly; the inordinate wear of bearing or pearl bowl is even in not having the steering of power-assisted, form the different problem of the required power of left rotation and right rotation.

Moreover, in the design of some hub-type motor applications, the essential use of considering brake 16 (brake), for brake 16 rationally is installed, the length of fixed axis 13 simultaneously usually extends, and the width that makes the preceding fork shaft 141 of turning rack 14 needs to strengthen simultaneously, increases the difficult design of mechanism, outward appearance.Certainly, the use of brake 16 can further increase the problem of uneven moment of torsion.

This shows that the above-mentioned article of commonly using still have many disappearances, real non-one kindhearted designer, and demand urgently being improved.

Summary of the invention

The purpose of this utility model is to provide a kind of motor frame with tool magnetic to do eccentric configuration with the wheel frame, with the centering type hub motor of the balance brake additional rotation inertia that brake was produced.

Another purpose of the present utility model promptly is to provide a kind of fixed axis can the shortening, to reduce the centering type hub motor of mechanism and appearance design difficulty.

Can reach the centering type hub motor of above-mentioned novel purpose, include a motor body and wheel frame, this motor body comprises the motor frame of tool magnetic, make this motor frame form rotor naturally, and in the motor frame, be combined with stator and reducing gear, and respectively extend a fixed axis from center, motor frame both sides, and on the fixed axis of one side, be combined with a brake brake, and with the preceding fork shaft Joint of the turning rack of a fixed axis and a fork-shaped; This takes turns frame is to be incorporated into outside the motor frame with eccentric pattern, and the center line of this wheel frame is corresponding with the central shaft of turning rack, make the wheel frame near a side that is combined with brake, cause motor frame and the arrangement of brake brake on fixed axis more flexible, can avoid the situation of moment of inertia skewness fully, and effectively reduce the motor drive shaft distance, help mechanism and appearance design.

Centering type hub motor provided by the utility model when comparing mutually with other prior art, has more following advantage:

1. the utility model is that the motor frame of tool magnetic is done eccentric configuration with the wheel frame, with the balance brake additional rotation inertia that brake was produced.

2. the utility model is fixed axis can be shortened, to reduce the difficulty of mechanism and appearance design.

Description of drawings

Fig. 1 is the generalized section of existing hub motor;

Fig. 2 is the generalized section of the utility model centering type hub motor;

Wherein:

1, motor body; 11, wheel frame; 111, center line; 12, reducing gear; 13, fixed axis; 14, turning rack; 141, preceding fork shaft; 15, moment of inertia center; 16, brake brake; 2, motor body; 21, motor frame; 22, stator; 23, reducing gear; 24, fixed axis; 25, ball bearing; 26, brake brake; 27, turning rack; 271, preceding fork shaft; 3, wheel frame; 4, central axis; 5, moment of inertia center.

Embodiment

Seeing also shown in Figure 2ly, is centering type hub motor provided by the utility model, mainly includes:

One motor body 2, this motor body 2 is to comprise the motor frame 21 with magnetic, make this motor frame 21 can be used as rotor, and in motor frame 21, be combined with stator 22 and reducing gear 23, and in motor frame 21 both sides extension fixed axis 24, the junction of this fixed axis 24 and motor frame 21 also is provided with ball bearing 25, be beneficial to the rotation of motor frame 21, and wherein be combined with brake brake 26 on the fixed axis 24 of a side in motor frame 21, and with the fixed axis 24 of motor frame 21 both sides respectively with preceding fork shaft 271 Joints of turning rack 27, cause motor frame 21 to be axle by fixed axis 24, and by the excitatory rotation of magnetic;

One takes turns frame 3, this takes turns frame 3 is to be fixed in outside the motor frame 21, and near reducing gear 23 and brake brake 26 places, cause wheel frame 3 to be set for the eccentric with motor frame 21, wheel frame 3 is then corresponding mutually with the central point of turning rack 27, so, can cause motor frame 21, the brake arrangement of brake 26 on fixed axis 24 more flexible, and can avoid the situation of motor frame 21 inertia skewness when rotating fully, and effective length that shortens fixed axis 24, cause preceding fork shaft 271 width of turning rack 27 to be reduced relatively, be beneficial to mechanism and appearance design.

In addition, the hub motor that centering type designs mainly is a problem of considering central axis 4 rotations, considers the accommodation space of brake brake 26 simultaneously, reaches the unbalanced problem of moment of torsion that is caused when brake brake 26 rotates.

So generally being expressed as of angular momentum: $\stackrel{\→}{l}=\stackrel{\→}{r}\×m\stackrel{\→}{v},$ Wherein m is a quality, and r and v are the vector representations of distance and speed.

And the relation of power and momentum can be expressed as:

$\stackrel{\→}{F}=\frac{d}{\mathrm{dt}}\left(m\stackrel{\→}{v}\right)$

Then moment can be expressed as:

$\stackrel{\→}{r}\×\stackrel{\→}{F}=\frac{d}{\mathrm{dt}}\left(\stackrel{\→}{r}\×m\stackrel{\→}{v}\right)$

The change of moment and angular momentum just can be expressed as:

$\stackrel{\→}{M}=\frac{d\stackrel{\→}{l}}{\mathrm{dt}}$

Because the calculating of the moment of inertia of rotating object is:

$I_1=\underset{i}{\∑}{m}_i{d}_{i1}^2$

So during the reasonable disposition of motor body 2 each part and brake brake 26, should consider the moment of inertia center 5 of each part and brake brake 26, and moment of inertia center 5 can be considered:

$\stackrel{\→}{D}=(\underset{i}{\mathrm{\Σ}}\stackrel{\→}{r}\×m_i{d}_i^2)\÷\left(\underset{i}{\mathrm{\Σ}}{m}_i{d}_i^2\right)$

Therefore, considering the motor frame 21 of whole hub-type motor, wheel frame 3, and the main rotating part of brake brake 26 etc., the motor frame 21 that can obviously find out the hub-type motor truly has the configuration that must do off-centre with wheel frame 3, the additional rotation inertia that is produced with balance brake brake 26, moreover, so arrange, can make 21 designs of motor frame jump out the absolute constraint that claims in center, also make fixed axis 24 length of hub-type motor be able to rational shortening.

Above-listed detailed description is specifying at one of the utility model possible embodiments, only this embodiment is not in order to limit claim of the present utility model, allly do not break away from any equivalence that the utility model skill spirit does and implement or change, all should be contained in the claim of this case.

Claims (2)

1. centering type hub motor comprises:

One motor body, it is to comprise the motor frame with magnetic, and is combined with stator and reducing gear in the motor frame, and extends fixed axis in motor frame both sides, this wherein is combined with the brake brake on the fixed axis, and with the fixed axis of motor frame both sides respectively with the preceding fork shaft Joint of turning rack;

It is characterized in that:

One takes turns frame, and this takes turns frame is to be fixed in outside the motor frame, and near brake brake place, causes wheel frame and motor frame to be set for the eccentric, and the wheel frame is then corresponding mutually with the central point of turning rack.

2. centering type hub motor as claimed in claim 1 is characterized in that: described motor frame can be used as rotor.

Images