# US 10,479,190 B2 · Electric wheel hub and driving wheel

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- Number: US 10,479,190 B2
- Document ID: US10479190B2
- Status: Granted
- Kind: B2
- Application number: 15/745,045
- Filed: 2017-05-25
- Published: 2018-07-19
- Granted: 2019-11-19
- Earliest claimed: 2016-05-27
- Assignees: Zhejiang Linix Motor Co., Ltd.
- Applicants: Zhejiang Linix Motor Co., Ltd.
- Inventors: Yuan Li; Jianliang Ge
- Web page: https://patentgrep.com/patent/US10479190B2

## CPC

- B60K 7/0007: {the motor being electric}
- B60K 7/00: Disposition of motor in, or adjacent to, traction wheel
- B60K 17/046: {with planetary gearing having orbital motion}
- B60T 13/748: {acting on electro-magnetic brakes (combined with fluid-pressure brake systems B60T13/667)}
- F16D 63/002: {Brakes with direct electrical or electro-magnetic actuation}
- H02K 7/1023: {using electromagnets}
- H02K 7/116: with gears
- H02K 7/14: Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06)
- B60K 2007/0038: {the motor moving together with the wheel axle}
- B60K 2007/0092: {the motor axle being coaxial to the wheel axle}
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60T: VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL (electrodynamic brake systems for vehicle, in general B60L; brakes per se, i.e. devices where braking effect occurs, including ultimate brake actuators, F16D); ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

An electric wheel hub, comprising a wheel hub (1) and an inner ring gear (2). The inner ring gear and the wheel hub are fixed coaxially and rotate synchronously. A drive motor is provided within an inner cavity of the wheel hub. A motor shaft of the drive motor has one end fitting to the inner ring gear via a planetary reduction mechanism, and the other end provided with an electromagnetic braking mechanism. The wheel hub of the present invention has advantages of reducing the weight of a drive wheel, lowering manufacturing costs, etc. Also disclosed is a drive wheel.

## Claims

### Claim 1

An electric hub, comprising a hub and an inner gear ring; wherein the inner gear ring and the hub are separated from each other, and the inner gear ring and the hub are fixed coaxially and rotate synchronously; the hub has a hollow inner chamber within which a driving motor is provided; the driving motor comprises a housing and a motor shaft; there is a gap between an outer wall of the housing and an inner wall of the inner chamber of the hub; and, one end of the motor shaft is matched with the inner gear ring via a planet speed-reduction mechanism, while an electromagnetic brake mechanism is provided at the other end of the motor shaft;
wherein a left hub end cover and a right hub end cover are fitted at two ends of the inner chamber of the hub, respectively; the planet speed-reduction mechanism comprises a planet carrier; and, the planet carrier is fixed to one end of an electric hub mounting shaft, while the other end of the electric hub mounting shaft extends outside the right hub end cover; and
wherein, the driving motor comprises a rear motor end cover and a front motor end cover; a cylindrical bearing chamber is formed on the rear motor end cover; the cylindrical bearing chamber extends outside the left hub end cover and is fixed to an electric hub mounting plate; and, the planet carrier is fixed to the front motor end cover.

### Claim 2

An electric hub, comprising a hub and an inner gear ring; wherein the inner gear ring and the hub are separated from each other, and the inner gear ring and the hub are fixed coaxially and rotate synchronously; the hub has a hollow inner chamber within which a driving motor is provided; the driving motor comprises a housing and a motor shaft there is a gap between an outer wall of the housing and an inner wall of the inner chamber of the hub; and, one end of the motor shaft is matched with the inner gear ring via a planet speed-reduction mechanism, while an electromagnetic brake mechanism is provided at the other end of the motor shaft wherein a number of bosses extending inward are formed on an inner wall of the hub, a number of fixed portions extending outward are formed on an outer edge of the inner gear ring, and fixed portion grooves matched with the fixed portions in shape are formed on the bosses; inner walls of the bosses are first cambered surfaces fitted with the outer edge of the inner gear ring; the fixed portions of the inner gear ring are located within the fixed portion grooves; and, the fixed portions of the inner gear ring are fixed to the hub via fasteners, and the outer edge of the inner gear ring is resisted against the inner walls of the bosses.

### Claim 3 (depends on 2)

The electric hub according to claim 2, characterized in that at least three fixed portions extending outward are formed on the outer edge of the inner gear ring, and the fixed portions are arranged annularly at uniform intervals; the bosses comprises first bosses and second bosses, and there are at least three first bosses; the fixed portion grooves are arranged on the first bosses, and the fixed portions are in one-to-one correspondence to the first bosses; the fixed portions of the inner gear ring are fixed to the fixed bosses via fasteners; and, the first chambered surfaces are formed on both the inner walls of the first bosses and the inner walls of the second bosses.

### Claim 4

An electric hub, comprising a hub and an inner gear ring; wherein the inner gear ring and the hub are separated from each other, and the inner gear ring and the hub are fixed coaxially and rotate synchronously; the hub has a hollow inner chamber within which a driving motor is provided; the driving motor comprises a housing and a motor shaft there is a gap between an outer wall of the housing and an inner wall of the inner chamber of the hub; and, one end of the motor shaft is matched with the inner gear ring via a planet speed-reduction mechanism, while an electromagnetic brake mechanism is provided at the other end of the motor shaft wherein the electromagnetic brake mechanism comprises a brake block located on the motor shaft and a brake pad which is sheathed outside the brake block and fixed with the brake block; the brake block is of a polygonal structure, the brake pad is disc-shaped, and a fitting groove matched with the brake block in shape is formed in the center of the brake pad; and, a brake arm capable of locking the brake pad is provided outside the hub.

### Claim 5

An electric hub, comprising a hub and an inner gear ring; wherein the inner gear ring and the hub are separated from each other, and the inner gear ring and the hub are fixed coaxially and rotate synchronously; the hub has a hollow inner chamber within which a driving motor is provided; the driving motor comprises a housing and a motor shaft there is a gap between an outer wall of the housing and an inner wall of the inner chamber of the hub; and, one end of the motor shaft is matched with the inner gear ring via a planet speed-reduction mechanism, while an electromagnetic brake mechanism is provided at the other end of the motor shaft wherein a lead clamp is fixed on the electric hub mounting plate; a first groove section and a second groove section are provided at a position on the electric hub mounting plate corresponding to an outer side of the lead clamp; a leading-out wire of the motor is fitted with the lead clamp, and a spring sheath is sheathed outside the leading-out wire; the spring sheath comprises a first section and a second section; the diameter of the first section is greater than that of the second section, and the diameter of the second section is matched with the diameter of the leading-out wire; the first section is fixed within the first groove section, and the second section is fixed within the second groove section; and, the leading-out wire passes through the lead clamp and then successively through the first groove section and the second groove section; and
the lead clamp comprises an upper clamp body and a lower clamp body, both of which are of an ohm-type structure; an opening of the upper clamp body and an opening of the lower clamp body are arranged opposite to each other; the leading-out wire is fitted between the upper clamp body and the lower clamp body; and meshing teeth are formed inside both the opening of the upper clamp body and the opening of the lower clamp body.

### Claim 6

An electric hub, comprising a hub and an inner gear ring; wherein the inner gear ring and the hub are separated from each other, and the inner gear ring and the hub are fixed coaxially and rotate synchronously; the hub has a hollow inner chamber within which a driving motor is provided; the driving motor comprises a housing and a motor shaft there is a gap between an outer wall of the housing and an inner wall of the inner chamber of the hub; and, one end of the motor shaft is matched with the inner gear ring via a planet speed-reduction mechanism, while an electromagnetic brake mechanism is provided at the other end of the motor shaft wherein at least six first process holes are formed at an end of the inner chamber of the hub equipped with the left hub end cover, and at least six second process holes are formed at an end of the inner chamber of the hub equipped with the right hub end cover; both the first process holes and the second process holes are arranged annularly at uniform intervals; and each of the second process holes is relatively located between two bosses; and
the bosses extend outward along an axis of the hub; second chambered surfaces matched with an inner wall of the right hub end cover are formed on the outer walls of the bosses, and the second chambered surfaces are of a slope structure inclined to the inner side.

### Claim 7

An electric hub, comprising a hub and an inner gear ring; wherein the inner gear ring and the hub are separated from each other, and the inner gear ring and the hub are fixed coaxially and rotate synchronously; the hub has a hollow inner chamber within which a driving motor is provided; the driving motor comprises a housing and a motor shaft there is a gap between an outer wall of the housing and an inner wall of the inner chamber of the hub; and, one end of the motor shaft is matched with the inner gear ring via a planet speed-reduction mechanism, while an electromagnetic brake mechanism is provided at the other end of the motor shaft wherein a number of ribs protruded outward are formed on the outer wall of the hub, the ribs are parallel to the axis of the hub, and the number of ribs are distributed at uniform intervals on the outer wall of the hub in a circumferential direction of the hub.

### Claim 8 (depends on 7)

The driving wheel according to claim 7, characterized in that a tire is provided outside the hub; a number of fitting grooves in one-to-one correspondence to the ribs are formed on an inner side of the tire; the width of each of the fitting grooves gradually increases from the bottom to the opening; each of the ribs has a square cross-section; and the tire is a solid foam tire.