CN202319875U

CN202319875U - In-wheel motor and electric vehicle

Info

Publication number: CN202319875U
Application number: CN2011204620880U
Authority: CN
Inventors: 白木学; 中川谦三
Original assignee: Shicoh Motor Shanghai Co Ltd
Current assignee: New Shicoh Motor Co Ltd
Priority date: 2011-11-18
Filing date: 2011-11-18
Publication date: 2012-07-11
Anticipated expiration: 2021-11-18

Abstract

The utility model aims to provide an in-wheel motor and an electric vehicle, and the in-wheel motor is used for reducing the vibration deformation of a coil in a high-speed rotating process. The in-wheel motor is characterized by being provided with a cylindrical coil, a coil support member, cylindrical external yokes, magnets and cylindrical internal yokes, wherein a shaft is inserted at the internal circumferential side of the cylindrical coil, the coil support member is fixed on the shaft and supports the coil, the cylindrical external yokes are arranged at the external circumferential side of the coil and are fixed on a wheel rim, the magnets are fixed on the internal circumferential faces of the external yokes and are arranged opposite to the external circumferential face of the coil, and the cylindrical internal yokes are arranged at the internal circumferential side of the coil and are arranged opposite to the internal circumferential face of the coil; the external yokes and the internal yokes freely rotate respectively relative to the shaft and are separated from each other; and a circular and annular resonance preventing ring is arranged at the distal end of the coil, relative to the coil support member.

Description

In-wheel motor and elec. vehicle

Technical field

The utility model is about through being arranged on motor and the in-wheel motor of drive wheels in the vehicle rim, particularly about electronlmobil, and hybrid vehicle, and the elec. vehicle of Electrical Bicycle etc.

Background technology

Following content is disclosed in patent documentation 1 (the flat 5-22133 communique of the open JP of utility model) and the patent documentation 2 (the open JP2006-246678 communique of patent): promptly; Cylindric coil is fixed on the coil support member; This coil support member is fixed on axle, and the cylindric outside yoke that is fixed with magnetite interior week is set at the outer circumferential side of coil, constitutes in-wheel motor thereby outside yoke is fixed on wheel rim; Wherein, through rotate the driving wheel rim to coil power supply.

Usually, brushless or centreless in-wheel motor is a cantilever structure, and thus, in high speed rotary, a little unbalancedness can appear in its tip side, and is big thereby vibration becomes.Like this, vibrate for the coil of cantilever structure, contacted problem will take place.

The utility model content

The purpose of the utility model is to provide a kind of in-wheel motor and elec. vehicle, reduces the vibration deformation of coil in the high speed rotary process.

For realizing said purpose in-wheel motor, be characterized in having: cylindric coil, all sides are inserted with axle in it; The coil support member, it is fixed on axle and goes up and support coils; Cylindric outside yoke, it is configured in the outer circumferential side of coil, and is fixed on the wheel rim; Magnetite, it is fixed on the inner peripheral surface of outside yoke, and be configured in the outer peripheral face of coil in opposite directions and right; And cylindric inner yoke, it is configured in interior all sides of coil, and be configured in the inner peripheral surface of coil in opposite directions and right; Wherein, outside yoke and inner yoke rotate freely with respect to axle respectively and are disconnected from each other; The far-end with respect to the coil support member of coil is fixed with the anti-stop ring of resonance of annular arrangement.

Described in-wheel motor, its further characteristics are that outside yoke has: main part, it comprises cylindrical portion and the bottom surface sections that is arranged on an end of cylindrical portion; And cap, it is arranged on the other end of cylindrical portion, is formed with the patchhole of axle on bottom surface sections and the cap respectively, thereby fixes the inside of airtight outside yoke to main part and cap, is provided with oil sealing between each patchhole and said.

Described in-wheel motor; Its further characteristics are; Inner yoke comprises through coil and magnetite in opposite directions and right cylindric yoke main body, support portion and bottom, the support portion be from the bottom radial be provided with a plurality of, on the bearing that the bottom is fixed on spool.

Described in-wheel motor, its further characteristics be, outside yoke, and inner yoke and axle all are to be made up of magnetic substance, to form the path of magnetic flow.

Described in-wheel motor; Its further characteristics are; Inner yoke comprises through coil and magnetite in opposite directions and right cylindric yoke main body, support portion and bottom, the support portion be from the bottom radial be provided with a plurality of, on the bearing that the bottom is fixed on spool; The far-end of the relative support portion of yoke main body externally on the support ring of the side of the bottom surface sections of the main part of yoke, is supported by this support ring.

For realizing the elec. vehicle of said purpose, be characterized in having each described in-wheel motor.

Because the tip side at coil is fixed through the anti-stop ring of the resonance of round, will reduce vibration and distortion like this.Disc brake assembly owing to be assembled with oil sealing, therefore prevents waterproof after being assembled into motor in addition, prevents the function that foreign matter gets into, so well safeguard stop mechanism.

Description of drawings

Fig. 1 is the schematic main pseudosection of an embodiment of in-wheel motor.

Fig. 2 is the local enlarged diagram at A place among Fig. 1.

Fig. 3 is the local enlarged diagram at B place among Fig. 1.

Fig. 4 is that the axle of coil is surveyed view among Fig. 1.

The specific embodiment

Below, with reference to Fig. 1 the utility model example is elaborated.In-wheel motor 1 in this example (brushless or core free motor) is arranged in the wheel rim 5 of each wheel 3 of four wheels of electronlmobil, and the periphery of wheel rim 5 is equipped with tire 7, and with each wheel 3 of motorized motions.

In-wheel motor 1 has: be fixed on the stator discs 11 on the axle 9; Be fixed on the coil 13 of stator discs 11; Be configured in the outside yoke 15 of the outer circumferential side of coil 13; And be configured in the inboard inside yoke 17. of coil 13 in addition, be assembled with plate disc brake 19 in the in-wheel motor 1.

The hollow that is used for distribution is formed on axle 9, passes the inner space of outside yoke 15 and is connected with coil 13 from the hollow of axle 9 to the lead-in wire 21 of coil 13 power supplies.The hollow that is used for the pipe arrangement road also is formed on axle 9, and the pipeline 22 that braking liquid is provided to the brake clamp of plate disc brake 19 passes the axial part 47a of support 47 and is connected with brake clamp from the hollow of axle 9.

Stator discs 11 as the coil support member is discoid, and the hole is formed on the central part of disk, and axle 9 runs through this hole.Stator discs 11 is fixed on the axle 9 by chock.

Coil 13 is cylindric, for example forms wire through the etching copper coin, is overlapped into multilayer after the insulation processing.An end of coil 13 is fixed on the periphery of stator discs 11.

Outside yoke 15 constitutes by main part 27 with through the cap 29 of screw retention at main part 27.Main part 27 is made up of cylindrical portion 27a cylindraceous that is arranged on coil 13 peripheries and bottom surface sections 27b.Cylindrical portion 27a is configured in the periphery of coil 13, and keeps at interval with coil 13.Interior all sides of cylindrical portion 27a are provided with magnetite 31, and magnetite 31 and coil 13 are in opposite directions and right.In addition, magnetite 31 be geomagnetic into a plurality of magnetic poles so that around direction have different magnetic poles.

The patchhole of axle 9 is formed on the middle body of bottom surface sections 27b, is inserted with axle 9 in the patchhole.Also have, bottom surface sections 27b is configured in the medial surface of wheel rim 5, and is fixed on wheel rim 5 from the outside of wheel rim 5 with screw 43.

Cap 29 is discoid, and its central portion is formed with the patchhole of axle 9, inserts patchhole to axle 9.Also have, the peripheral part of cap 29 is fixed on the main part 27a through screw 45.

Inner yoke 17 by: through coil 13 and magnetite 31 in opposite directions and right cylindric yoke main body 17a; And support portion 17b constitutes.Support portion 17b 18 is radial and is provided with a plurality ofly from the bottom, and bottom 18 is fixed on axle 9 the bearing 47 through screw 49.Bearing 47 is a radial thrust bearing, is provided with in pairs.

Plate disc brake 19 is made up of brake clamp 19a and brake disc 20.Brake clamp 19a is screwed on the radial part 47b of support 47, and support 47 is fixed on the axle 9 through its axial part 47a, does not rotate.Axial part 47a and the fixing of axle 9 can fix through fasteners such as key, pin or chocks.Brake disc 20 is fixed on the bottom 18 through screw 24, in the process of drive wheels, rotates synchronously with wheel.

Outside yoke 15, inner yoke 17 and axle 9 all are to be made up of magnetic substance, to form the path of magnetic flow.

As shown in Figure 4, the free end of coil 13 is connected with the anti-stop ring 13a of resonance of annular arrangement, and timely like this in the process of wheel high-speed operation, the vibration of coil 13 and distortion are also very little, can not cause the problem that contacts with magnetite.

As shown in Figure 2, between the axle 9 of the inboard of wheel 3 and cap 29, be provided with oil sealing 51, preferably, for the ease of installing, oil sealing 51 is to be interposed between the hole wall of patchhole of central portion of oil seal seat 54 and cap 29.Oil seal seat 54 is fixed on and is arranged on the axle 9.

As shown in Figure 3, between the axial part 47a of the hole wall of the patchhole of the central portion of the bottom surface sections 27b of the main part 27 of the axle 9 in the outside of wheel 3 and outside yoke 15 and support 47, be provided with oil sealing 52.

Oil sealing 51 and oil sealing 52 combineds action, plate disc brake 19 devices prevent waterproof after being assembled into motor 1, prevent the function that foreign matter gets into, so well safeguard stop mechanism.

Driving about in-wheel motor 1; Coil 13 is given in 21 power supplies through going between; Magnetic field with respect between magnetite 31 and the inner yoke 17 just produces electromagnetic force; Therefore magnetite 31 rotates with respect to coil 13 with outside yoke 15 together, and the wheel rim 5 that is fixed on outside yoke 15 just is driven in rotation with respect to axle 9.And inner yoke 17 also rotates with outside yoke 15 synchronously.

The path of the magnetic flow of magnetite 31 is, from opposite directions and the loop of right inside yoke 17 through axle 9 and outside yoke.

According to this example, because inner yoke 17 is members separately with outside yoke 15, through being arranged separately in respectively on the axle 9, even the inboard of coil 13 is provided with the structure of inner yoke 17, also can easy mounting.

In this example, the magnetic flow that magnetite 31 acts on coil 13 is through by inner yoke 17, and the flux density that acts on coil 13 can be improved in the loop of the path that axle 9 and outside yoke 15 form therefore.Like this and do not have the occasion of inner yoke to compare, the torque that acts on the wheel rim 5 can be improved.

In this example, cap 29 and main part 27 make outside yoke 15 waterproof, thereby can prevent in outside yoke 15, to sneak into foreign matter, and simultaneously, water resistance is better.

Inner yoke 17 is the members that separate with outside yoke 15, and rotates freely with respect to axle 9 respectively, therefore stops after coil 13 energisings, producing generation current through being connected loads such as battery coil 13, thereby starting regenerative brake.In wheel rim 5 rotations, because the magnetic action that retracts magnetite on inner yoke 17, so suppressed the rotation of outside yoke 15, can play the effect of auxiliary braking for this reason.

The utility model is not limited to above-mentioned example, in the scope that does not break away from the utility model main idea, can carry out all changes.For example: outside yoke 15 can not need airtight construction, and through forming air extractor vent to play inner colded effect.

Also can make cylindrical portion 27a and the bottom surface sections 27b of the main part 27 of outside yoke be member separately, fixing with screw etc. again.

Each screw can be respectively a bolt also.

Claims

1. in-wheel motor is characterized in that having:

Cylindric coil, all sides are inserted with axle in it;

The coil support member, it is fixed on axle and goes up and support coils;

Cylindric outside yoke, it is configured in the outer circumferential side of coil, and is fixed on the wheel rim;

Magnetite, it is fixed on the inner peripheral surface of outside yoke, and be configured in the outer peripheral face of coil in opposite directions and right; And

Cylindric inner yoke, it is configured in interior all sides of coil, and be configured in the inner peripheral surface of coil in opposite directions and right;

Wherein, outside yoke and inner yoke rotate freely with respect to axle respectively and are disconnected from each other; The far-end with respect to the coil support member of coil is fixed with the anti-stop ring of resonance of annular arrangement.

2. in-wheel motor as claimed in claim 1 is characterized in that,

Outside yoke has:

Main part, it comprises cylindrical portion and the bottom surface sections that is arranged on an end of cylindrical portion; And

Cap, it is arranged on the other end of cylindrical portion,

Be formed with the patchhole of axle on bottom surface sections and the cap respectively, thereby fix the inside of airtight outside yoke to main part and cap, be provided with oil sealing between each patchhole and said.

3. in-wheel motor as claimed in claim 1; It is characterized in that; Inner yoke comprises through coil and magnetite in opposite directions and right cylindric yoke main body, support portion and bottom, the support portion be from the bottom radial be provided with a plurality of, on the bearing that the bottom is fixed on spool.

4. in-wheel motor as claimed in claim 1 is characterized in that, outside yoke, and inner yoke and axle all are to be made up of magnetic substance, to form the path of magnetic flow.

5. in-wheel motor as claimed in claim 2; It is characterized in that; Inner yoke comprises through coil and magnetite in opposite directions and right cylindric yoke main body, support portion and bottom, the support portion be from the bottom radial be provided with a plurality of, on the bearing that the bottom is fixed on spool; The far-end of the relative support portion of yoke main body externally on the support ring of the side of the bottom surface sections of the main part of yoke, is supported by this support ring.

6. an elec. vehicle is characterized in that having like each described in-wheel motor in the claim 1 to 5.