KR20120022168A - In wheel driven system - Google Patents

In wheel driven system Download PDF

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Publication number
KR20120022168A
KR20120022168A KR1020100085410A KR20100085410A KR20120022168A KR 20120022168 A KR20120022168 A KR 20120022168A KR 1020100085410 A KR1020100085410 A KR 1020100085410A KR 20100085410 A KR20100085410 A KR 20100085410A KR 20120022168 A KR20120022168 A KR 20120022168A
Authority
KR
South Korea
Prior art keywords
motor
wheel
trailing arm
reducer
space
Prior art date
Application number
KR1020100085410A
Other languages
Korean (ko)
Inventor
김동현
Original Assignee
현대모비스 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR1020100085410A priority Critical patent/KR20120022168A/en
Publication of KR20120022168A publication Critical patent/KR20120022168A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/051—Trailing arm twist beam axles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
    • F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0038—Disposition of motor in, or adjacent to, traction wheel the motor moving together with the wheel axle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K2007/0061—Disposition of motor in, or adjacent to, traction wheel the motor axle being parallel to the wheel axle

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

PURPOSE: An in-wheel drive system is provided to reduce unsprung mass through a compact motor design and to simplify an assembling process by reducing unnecessary components. CONSTITUTION: An in-wheel drive system comprises a motor(5) and a reducer. A motor cover is coupled to the side of the motor and is located toward a trailing arm(1). A protrusion having an empty space is formed in the motor cover and is inserted into the inner space of the motor. The trailing arm coupled to the motor is inserted into the empty space of the protrusion. A distance from the center of a wheel to the trailing arm is reduced as many as the inserted length of the trailing arm.

Description

In Wheel Driven System

The present invention relates to an in-wheel drive system, and more particularly, to an in-wheel drive system that minimizes the distance between the wheel center and the chassis coupling portion.

In-wheel drive systems generally have a motor and a reducer mounted with a brake on the inside of the wheel.

The in-wheel drive system is divided into a reduction gear type in which a drive shaft and a wheel shaft are inconsistent and an axial gear reducer type in which a driving shaft and a wheel shaft coincide with each other. The structure is applied.

In addition, the shaft type reducer type in which the drive shaft and the wheel shaft coincide is divided into a planetary reducer type applied with a drum brake and a non-reduction type applied with a caliper.

The planetary reducer type is a planetary gear used for torque increase, so there is no space for a caliper to be applied to the drum brake, and the non-reduction type can increase the torque without a reducer to secure the caliper's mounting space. The wheel size becomes larger.

However, in the type in which the drive shaft and the wheel shaft coincide with each other as described above, the reducer and the motor are arranged side by side on the same axis with respect to the hub, such that the coupling portion extending from the wheel to the chassis coupling portion (trailing arm) is further separated by the size of the motor.

Therefore, in the in-wheel drive system of the type in which the drive shaft and the wheel shaft coincide with each other, the smaller the distance from the wheel center to the chassis coupling portion (trailing arm) is advantageous for the input load according to the driving, thereby reducing the width of the motor and the reducer. The structure that can be made is very important.

Accordingly, the present invention in view of the above point is to form a receiving space to reduce the width on both sides of the rotor of the rotor of the motor to form a reduction gear with the chassis side components, the drive shaft and the wheel shaft is matched It is an object of the present invention to provide an in-wheel drive system in which the distance from the wheel center to the chassis coupling part (trailing arm) can be greatly reduced.

In the present invention for achieving the above object is provided with a motor and a reducer installed in the inner space of the wheel, the drive shaft and the wheel shaft of the motor in the in-wheel drive system,

A motor cover positioned toward the trailing arm and coupled to the side of the motor is provided with a protrusion having a hollow space to fit into a space recessed into the inner space of the motor, and the protrusion coupled to the motor into the hollow space. The trailing arm side portion is inserted to reduce the distance A from the center of the wheel to the trailing arm by the insertion length,

A motor housing coupled to the motor on the opposite side of the motor cover is provided with a depression having a hollow space to fit into a space recessed into the inner space of the motor, wherein the reducer is coupled to the motor with a hollow space of the depression. Is inserted to reduce the distance A from the center of the wheel to the trailing arm by the insertion length.

The motor is provided with a rotor which is a rotating body forming an “I” cross section, and the protrusion of the motor cover and the depression of the motor housing are fitted into respective spaces formed on both sides of the rotor.

A motor housing is fastened to the motor in a direction opposite to the motor cover, and a resolver is installed in the upper space of the rotor, in which the motor cover is padded, and a reducer pressed into the recess of the motor housing is fastened to the motor housing. It is fixed with dowel pins.

The present invention reduces the width of the coupling part by the length of the receiving space formed on both sides of the motor to minimize the distance from the wheel center to the chassis coupling portion (trailing arm) has the effect of improving the durability of the chassis.

In addition, the compact motor design by removing both parts of the rotor, the rotor of the motor of the present invention has the effect that the Unsprung Mass can be reduced.

In addition, since the motor and the reducer of the present invention are press-assembled with each other, unnecessary assembly parts are reduced and the assembling process is simplified. In particular, when one of the motor or the reducer is individually replaced, the A / S property is also greatly improved.

1 is a configuration diagram of the in-wheel drive system according to the present invention, Figure 2 is a cross-sectional configuration diagram of the in-wheel drive system according to the present invention, Figure 3 is a coupling diagram of the motor and the reducer according to the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the exemplary embodiments of the present invention may be embodied in various different forms, one of ordinary skill in the art to which the present invention pertains may be described herein. It is not limited to the Example to make.

1 is a configuration diagram of an in-wheel drive system according to the present invention, wherein the in-wheel drive system is a type in which the drive shaft and the wheel shaft of the motor coincide.

As shown, the in-wheel drive system is fastened to the wheel axle of the wheel which has the drum brake 2 inwardly and forms a hub which forms an axial center, and the trailing arm 1 which is a chassis coupling part located inwardly of the wheel. The drive shafts of the motor 5 coincide with each other on the same axis KK.

In the in-wheel drive system as described above, the shorter the distance A from the wheel center of the wheel to the trailing arm 1, the more advantageous the effect on the input load transmitted during driving.

Since the reduction gear 9 which drives the wheel by receiving the rotational force of the motor 5 is connected to the drive shaft of the motor 5, the distance A from the wheel center of the wheel to the trailing arm 1 is the width of the motor 5. In addition to the size, it is determined by the length of the fastening portion of the motor 5 and the trailing arm 1 and the width of the reducer 9 coupled to the motor 5 on the opposite side.

Therefore, although various structures for shortening the distance A can be applied, in the in-wheel drive system according to the present embodiment, the trailing arm 1 of the motor 5 is changed by changing the coupling structure of the trailing arm 1 of the motor 5. The distance A is shortened to reduce the distance A, and in addition, a double structure is applied to reduce the distance A again by reducing the length of the fastener 9 to the motor 5 side of the reducer 9.

As an example, the rotor 6, which is the rotating body constituting the motor 5, has an overall "I" cross section shape, and is recessed into the inner space of the rotor 6 using both sides of the "I" cross section. An empty space is formed, such as a motor cover accommodation space 7 and a reduction gear accommodation space 8a, which are spaces.

In this embodiment, since the motor cover 10 is coupled to the motor cover accommodation space 7, the motor cover 10 is provided with a protrusion having the same cross-sectional structure inserted into the motor cover accommodation space 7, and the motor housing. Since 8 is coupled to the reducer accommodation space 8a, the motor housing 8 is provided with a depression having the same cross-sectional structure inserted into the reducer accommodation space 8a.

2 shows a cross-sectional view of the in-wheel drive system according to the present embodiment.

As shown, the motor 5 is provided with a rotor 6 which is a rotating body forming an “I” cross section, and the motor cover 10 is fastened to one side of the rotor 6 and to the opposite side thereof. The motor housing 8 is fastened.

In addition, the resolver 30 is installed in an upper space of the rotor 6, on which the motor cover 10 is padded, and toward the motor housing 8, which is padded toward the reduction gear accommodation space 8a of the rotor 6. The reducer 9 is coupled.

The resolver 30 functions to accurately detect the speed of the motor and the position of the magnet for controlling the motor 5.

The motor cover 10 according to the present embodiment forms a hat-shaped cross-sectional structure in which a protrusion is formed to match the cross-sectional structure of the motor cover accommodation space 7 recessed to one side of the rotor 6. Press the motor cover 10 with a press or the like to form a stepped cross-sectional structure, the thickness of the portion to be in close contact with the rotor 6 forms a thicker than other portions.

Accordingly, when the motor cover 10 is assembled to one side of the rotor 6, the protrusion of the motor cover 10 is inserted into the motor cover accommodation space 7 recessed in one side of the rotor 6. You lose.

As described above, the motor cover 10 is inserted into the recessed motor cover accommodation space 7 that forms one side of the rotor 6 by using the protrusion, so that the rear portion of the motor cover 10 and the trailing arm 1 are mounted. Between the b is formed a length overlapping the inner space of the protrusion of the motor cover 10.

The overlap length b may provide a clearance for inserting a component for coupling between the trailing arm 1 and the motor 5, and thus the distance A from the wheel center to the trailing arm 1, which is the chassis coupling part. Can be shortened by the overlap length b.

As described above, as the distance A is shortened by the overlap length b, even in-wheel drive systems of the type in which the drive shaft and the wheel shaft coincide with each other can more advantageously act on the input load according to the driving and the durability of the chassis side.

In addition, the reduction gear 9 is coupled to the depression of the motor housing 8, which is padded toward the reduction gear accommodation space 8a of the rotor 6.

In this embodiment, the reducer 9 is inserted into the recess of the motor housing 8 so that the reducer 9 is formed with an overlap length a overlapping with the motor 5 side.

Therefore, even if the motor 5 and the reducer 9 are arranged sequentially with the same axis KK, the width of the motor 5 and the reducer 9 is reduced by the overlap length a, and the width The reduction in size will shorten the distance A from the wheel center to the trailing arm (1), which is the chassis coupling.

As described above, in the present embodiment, the overlapping length b is formed on the trailing arm 1 side based on the motor 5 and the overlapping length a is formed on the reducer 9 side, so that the wheel center to the trailing arm 1 which is the chassis coupling part is formed. The distance A can be shortened by the sum of the overlap length b and the overlap length a.

As described above, as the distance A is shortened by the overlap length a + b, even in-wheel drive systems of the type in which the drive shaft and the wheel shaft coincide with each other can further improve the advantageous action against the input load caused by the driving and the durability of the chassis side.

In addition, in the present embodiment, the reducer 9 is press-fitted and fixed to the motor housing 8 by the dowel pin 20, so that the reducer 9 and the motor housing 8 can be easily assembled and separated.

That is, the dowel pin 20 is press-fitted between the housing of the reducer 9 and the depression of the motor housing 8 while the reducer 9 is inserted into the motor housing 8. 20 will fix the reducer 9 and the motor housing 8 to each other.

The dowel pins 20 are formed at four positions at intervals of 90 degrees.

As described above, the reducer 9 is fixed to the motor housing 8 by the dowel pin 20 so as to separate the reducer 5 from the motor 5 so that only one side of the motor 5 or the reducer 9 fails. When the motor (5) and the reducer (9) is not replaced together, it is possible to provide convenience that can replace or maintain only the faulty one.

1: trailing arm 2: drum brake
5: motor 6: rotor
7: Motor cover accommodating space 8: Motor housing
8a: Reducer space
9: Reducer 9a: Fixed End
10: motor cover
20: dowel pin 30: resolver

Claims (4)

In the in-wheel drive system having a motor and a reduction gear installed in the inner space of the wheel, the drive shaft and the wheel shaft of the motor coincide,
A motor cover positioned toward the trailing arm and coupled to the side of the motor is provided with a protrusion having a hollow space to fit into a space recessed into the inner space of the motor, and the protrusion coupled to the motor into the hollow space. The trailing arm side portion is inserted to reduce the distance A from the center of the wheel to the trailing arm by the insertion length,
A motor housing coupled to the motor on the opposite side of the motor cover is provided with a depression having a hollow space to fit into a space recessed into the inner space of the motor, wherein the reducer is coupled to the motor with a hollow space of the depression. Is inserted to reduce the distance A from the center of the wheel to the trailing arm by the insertion length.
The motor of claim 1, wherein the motor is provided with a rotor which is a rotating body having an “I” cross-sectional shape, and the protrusions of the motor cover and the depressions of the motor housing are inserted into respective spaces formed on both sides of the rotor. In-wheel drive system, characterized in that the losing.
The speed reducer of claim 1, wherein a motor housing is fastened to the motor in a direction opposite to the motor cover, and a resolver is installed in an upper space of the rotor on which the motor cover is padded, and the reducer is pressed into the recess of the motor housing. In-wheel drive system, characterized in that fixed to the dowel pin fastened to the motor housing.
The in-wheel drive system according to claim 3, wherein the dowel pin is at least one.
KR1020100085410A 2010-09-01 2010-09-01 In wheel driven system KR20120022168A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100085410A KR20120022168A (en) 2010-09-01 2010-09-01 In wheel driven system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100085410A KR20120022168A (en) 2010-09-01 2010-09-01 In wheel driven system

Publications (1)

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KR20120022168A true KR20120022168A (en) 2012-03-12

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KR1020100085410A KR20120022168A (en) 2010-09-01 2010-09-01 In wheel driven system

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101441813B1 (en) * 2013-06-25 2014-09-18 현대위아 주식회사 Device for driving rear wheel of electric vehicle
CN105034790A (en) * 2015-09-10 2015-11-11 安徽工程大学 Electric automobile torsion girder type driving system and driving method of same
CN105329088A (en) * 2014-08-08 2016-02-17 上海劲马车辆有限公司 Driving motor-contained wheel hub system for pure electric automobile
KR20220102283A (en) 2021-01-13 2022-07-20 현대위아 주식회사 In wheel system
KR20220117744A (en) 2021-02-17 2022-08-24 현대위아 주식회사 Suspension with independent steering
US11602951B2 (en) 2020-02-24 2023-03-14 Bendix Commercial Vehicle Systems Llc Splined drum and electric motor engagement assembly
US11635118B2 (en) 2020-01-17 2023-04-25 Bendix Commercial Vehicle Systems Llc Electric vehicle drum brake dust evacuation and cooling concept

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101441813B1 (en) * 2013-06-25 2014-09-18 현대위아 주식회사 Device for driving rear wheel of electric vehicle
US9090142B2 (en) 2013-06-25 2015-07-28 Hyundai Wia Corporation Device for driving rear wheel of electric vehicle
CN105329088A (en) * 2014-08-08 2016-02-17 上海劲马车辆有限公司 Driving motor-contained wheel hub system for pure electric automobile
CN105034790A (en) * 2015-09-10 2015-11-11 安徽工程大学 Electric automobile torsion girder type driving system and driving method of same
US11635118B2 (en) 2020-01-17 2023-04-25 Bendix Commercial Vehicle Systems Llc Electric vehicle drum brake dust evacuation and cooling concept
US11602951B2 (en) 2020-02-24 2023-03-14 Bendix Commercial Vehicle Systems Llc Splined drum and electric motor engagement assembly
KR20220102283A (en) 2021-01-13 2022-07-20 현대위아 주식회사 In wheel system
KR20220117744A (en) 2021-02-17 2022-08-24 현대위아 주식회사 Suspension with independent steering

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