CN103935203A - Unequal-length double-trailing-arm suspension wheel side electric driving system - Google Patents
Unequal-length double-trailing-arm suspension wheel side electric driving system Download PDFInfo
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- CN103935203A CN103935203A CN201410146106.2A CN201410146106A CN103935203A CN 103935203 A CN103935203 A CN 103935203A CN 201410146106 A CN201410146106 A CN 201410146106A CN 103935203 A CN103935203 A CN 103935203A
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- wheel
- trailing arm
- trailing
- vehicle frame
- bearing
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Abstract
The invention discloses an unequal-length double-trailing-arm suspension wheel side electric driving system. A driving wheel is arranged in a bearing supporting base through a small bearing in a supporting mode. A motor and a bearing supporting base are integrally arranged and are fixed on a vehicle frame. Power is transmitted between the driving wheel and a driven wheel in a synchronous-belt-transmission mode or a chain-transmission mode or a gear transmission mode, the driven wheel is connected with a driving shaft through a spline for power transmission, the driving shaft is supported in a stand column through a large bearing, and an integrated mechanism assembled by the driven wheel and a double-trailing-arm suspension swings around the hinged axis of double trailing arms and the vehicle frame along with the double trailing arms. The system has the advantages that a half axle and a cardan joint in a traditional electric vehicle driving vehicle device are removed, non-sprung mass is effectively reduced, and vehicle smoothness and vehicle wheel ground contacting performance are improved.
Description
Technical field
The invention belongs to electric automobile chassis and transmission field, be specifically related to not isometric pair of trailing arm suspension fork wheel edge power drive system of one.
Background technology
Along with the continuous rise of electronlmobil, there is the drive form of multiple battery-driven car.The size of automobile nonspring carried mass directly has influence on ride of vehicle and wheel ground connection property.At present, wheel limit power drive system taking electric drive wheel as representative because its drive system and complete vehicle structure are succinct, can utilize that space is large, driving efficiency is high, each drive wheel torque can independently be controlled, and is conducive to improve the rideability under severe pavement conditions and becomes study hotspot.But because motor is installed in drive wheel, automobile nonspring carried mass is larger, be unfavorable for automobile ride and wheel ground connection property.
For these problems, main research direction has both at home and abroad at present: the highly integrated research of electric drive wheel electromechanical integration, the exploitation of high power density motor and the innovation of structure aspects etc.With regard to structure aspects, patent of invention 200810041741.9 has proposed a kind of double trailing arm, can be when motor be fixed on vehicle frame, utilize the motion characteristics of isometric pair of trailing arm suspension, the width between centers of tape handler is not changed with wheel bounce.But the isometric pair of adverse effect that trailing arm also has it to beat: the middle wheelspan of beating changes feature greatly with wheel bounce, this can cause the phenomenons such as wear on tyres is serious.
Summary of the invention
Problem to be solved by this invention is that a kind of nonspring carried mass, not isometric pair of trailing arm suspension fork wheel edge power drive system simple in structure of effectively reducing will be provided.
In order to solve above technical matters, the invention provides not isometric pair of trailing arm suspension fork wheel edge power drive system of one, comprise motor, driving wheel, bearing brackett, little bearing, axle drive shaft, large bearing, lower trailing arm, column, flower wheel, upper trailing arm.Driving wheel is installed and is supported in bearing brackett by little bearing, motor and bearing brackett one are installed and are fixed on vehicle frame, transmission of power between principal and subordinate wheel is toothed belt transmission or for chain transmission or for gear transmission, flower wheel is connected transferring power by spline with axle drive shaft, axle drive shaft is supported in column by large bearing, and the integrated mechanism that flower wheel is assembled into two trailing arm suspensions swings around two trailing arms and vehicle frame hinge axes with two trailing arms.
Described pair of trailing arm suspension comprises trailing arm and lower trailing arm, upper trailing arm, lower trailing arm, column and a four-bar mechanism of vehicle frame composition, the fixed lever point that becomes of wheel bounce center and column, find wheel bounce centrode circular arc line by Optimization Design, motor is consolidated in to vehicle frame, and motor output shaft line center arrangement, in the center of circle of this arc track, makes driving device, toothed belt transmission or chain transmission or gear-driven width between centers remain unchanged.
Bearing brackett and motor are mounted on vehicle frame becomes a part for spring carried mass, and the backup bearing through hole line of centers of little bearing brackett with motor output shaft line the concentric so that installation of motor and bearing brackett fix.
In the present invention, motor, bearing brackett are arranged in vehicle frame, described vehicle frame, upper trailing arm, lower trailing arm and column form a four-bar mechanism, set up the parameter model of this four-bar mechanism in system of axes, and its central post is as connecting rod and wheel center will serve as lever point and column is fixed.The given desirable wheel center circular arc line of beating, and some point coordinate on suitable selection circular arc line are as known parameters, obtain the best with the method for optimal design and approach the beat arc track of circular arc line of wheel center, if now motor output shaft line center arrangement in the home position of this arc track, can ensure the invariability of principal and subordinate wheel width between centers, thereby make this mechanism scheme reasonable.Suitable step-down ratio is set simultaneously and can plays the effect that the increasing of slowing down is turned round.
The present invention can be used for the wheel limit electric drive of non-wheel flutter, in the time of back-wheel drive, can completely use.
Brake system of the present invention can adopt disc type brake or drum brake.
Superior effect of the present invention is:
(1) saved traditional electrical motor-car and driven semiaxis and the universal-joint in car device, two trailing arms are effectively for motor arrangement has been vacateed space;
(2) integrated to drive motor and driving wheel etc. relevant Power Component is fixed on to vehicle frame, thereby has reduced nonspring carried mass to a great extent, improved ride comfort and the wheel ground connection property of automobile;
(3), due to the appropriate design of structure, slowing down to increase to turn round to adopt toothed belt transmission, chain transmission or gear transmission.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is mechanism principle figure of the present invention;
Number in the figure explanation
1-motor; 2-driving gear;
3-bearing brackett; 4-little bearing;
5-axle drive shaft; 6-large bearing;
7-lower trailing arm; 8-column;
9-driven gear; 10-upper trailing arm;
11-vehicle frame.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, the invention provides not isometric pair of trailing arm suspension fork wheel edge power drive system of one, comprise motor 1, driving gear 2, bearing brackett 3, little bearing 4, axle drive shaft 5, large bearing 6, lower trailing arm 7, column 8, driven gear 9, upper trailing arm 10 and vehicle frame 11.
Fig. 1 is structural representation of the present invention, and deceleration increasing of the present invention is turned round device and can be adopted toothed belt transmission, chain transmission or gear transmission, will describe taking gear transmission as embodiment herein.Driving gear 2 is installed and is supported in bearing brackett 3 by little bearing 4, and bearing brackett 3 is mounted on vehicle frame with motor 1, and the backup bearing through hole line of centers of bearing brackett 3 with the output axis of motor 1 concentric the so that installation of motor 1 and bearing brackett 3 fix.Slow down to increase and turn round the transmission of device employing gear (2,9).Driven gear 9 is connected with transferring power with axle drive shaft 5 by spline, axle drive shaft 5 is supported in column 8 by large bearing 6, and the integrated mechanism that driven gear 9 is assembled into two trailing arms (7,10) etc. swings around two trailing arms (7,10) and the hinge axes of vehicle frame 11 with two trailing arms (7,10).
Fig. 2 is mechanism principle figure of the present invention, mainly comprises trailing arm 10, lower trailing arm 7, column 8, motor 1 and vehicle frame 11, and motor 1 is fixed on vehicle frame 11.Wherein vehicle frame 11, upper trailing arm 10, lower trailing arm 7 and column 8 form a four-bar mechanism.In system of axes, set up the parameter model of four-bar mechanism (7,8,10,11), wherein the center O of motor 1
1be simultaneously also the axis centre of driving gear 2, circular arc S is the desirable target wheel center track of beating, O
2for the axis centre of driven gear 9, column 8 is as connecting rod and wheel center O
2name a person for a particular job fixed as lever point and connecting rod.This mechanism is set up to parameter relationship formula below.
A, 2 of D are fixed therefore AD is frame bar, O with vehicle frame
1o
2for the width between centers between output axis and the driven gear 9 of motor 1.Make AB=L
aB, BC=L
bC, CD=L
cD, AD=L
aD, BD=L
bD, BO
2=L
bO2, the angle between BA and horizon is θ, and the angle between DA and horizon is α, and the angle between CB and horizon is δ, and
.Ax, Ay are respectively abscissa and the ordinate that A is ordered.
in,
(1)
thereby,
(2)
in,
(3)
Thereby
（4）
（5）
Lever point (wheel center point) O
2the coordinate of point can be expressed as
（6）
Can calculate, frame long at A point coordinate arbitrarily, each bar and side link stagger angle α, β, θ lower link point (wheel center point) O by formula (2), (4), (5), (6)
2the coordinate of point.
With X=[
] be design variable, adopt by the O shown in parameter list
2point coordinate and given O
2the mean effective value minimum of point coordinate error sum of squares is objective function, and its objective function is:
Wherein, x
i, y
ifor the given wheel center coordinate of putting on track S track of beating, n is the number to position fixing.
For two trailing arms, meeting on the basis of above-mentioned relation formula, use the method for optimal design to carry out optimizing operation, make minf (x) obtain minimum value on the basis that meets each bar elongate member, now can obtain the best and approach the beat arc track of circular arc line S of wheel center, if now the output axis center arrangement of motor 1 in the home position O of this arc track
1, can ensure the invariability of main driven gear width between centers, thereby make this mechanism scheme reasonable.
In the present invention, choose suitable transmitting ratio, can play slows down increases the effect of turning round.
Brake portion in the present invention can adopt disc type brake or drum brake, only need install corresponding structure additional so that brake clamp or brake wheel to be installed.
The present invention can be used for the wheel limit electric drive of non-wheel flutter, in the time of back-wheel drive, can completely use.
Claims (2)
1. not isometric pair of trailing arm suspension fork wheel edge power drive system, it is characterized in that: driving wheel is installed and is supported in bearing brackett by little bearing, motor and bearing brackett one are installed and are fixed on vehicle frame, transmission of power between principal and subordinate wheel is toothed belt transmission or for chain transmission or for gear transmission, flower wheel is connected transferring power by spline with axle drive shaft, axle drive shaft is supported in column by large bearing, and the integrated mechanism that flower wheel is assembled into two trailing arm suspensions swings around two trailing arms and vehicle frame hinge axes with two trailing arms.
2. not isometric pair of trailing arm suspension fork wheel edge power drive system of one as claimed in claim 1, it is characterized in that: described pair of trailing arm suspension comprises trailing arm and lower trailing arm, upper trailing arm, lower trailing arm, column and vehicle frame composition, four-bar mechanism, the fixed lever point that becomes of wheel bounce center and column, find wheel bounce centrode circular arc line by Optimization Design, and motor is consolidated in to vehicle frame, and its output axis center arrangement, in the center of circle of this arc track, remains unchanged the width between centers of driving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410146106.2A CN103935203A (en) | 2014-04-14 | 2014-04-14 | Unequal-length double-trailing-arm suspension wheel side electric driving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410146106.2A CN103935203A (en) | 2014-04-14 | 2014-04-14 | Unequal-length double-trailing-arm suspension wheel side electric driving system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103935203A true CN103935203A (en) | 2014-07-23 |
Family
ID=51183192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410146106.2A Pending CN103935203A (en) | 2014-04-14 | 2014-04-14 | Unequal-length double-trailing-arm suspension wheel side electric driving system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103935203A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112238895A (en) * | 2020-10-16 | 2021-01-19 | 中国北方车辆研究所 | Independent steering system with steering motor arranged on equal-length double-trailing-arm suspension knuckle |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2196556A (en) * | 1936-07-10 | 1940-04-09 | Hollos Zsigmond | Vehicle axle suspension |
| GB752640A (en) * | 1953-11-14 | 1956-07-11 | Daimler Benz Ag | Improvements relating to motor vehicle axle suspensions |
| US5176398A (en) * | 1988-07-28 | 1993-01-05 | Mazda Motor Corp. | Vehicle rear suspension system |
| CN101342848A (en) * | 2008-08-15 | 2009-01-14 | 同济大学 | Double trailing arm type suspension fork wheel edge drive structure of new-type electric car |
| CN102774269A (en) * | 2012-07-14 | 2012-11-14 | 盐城工学院 | Unequal double-wishbone suspension wheel side driving device capable of achieving large-angle steering |
| CN102774267A (en) * | 2012-07-30 | 2012-11-14 | 同济大学 | Integrated double trailing arm suspension wheel-side electric driving system for steering wheel |
| CN102975613A (en) * | 2012-12-27 | 2013-03-20 | 上海瑞尔实业有限公司 | Independent suspension structure for driving bridge |
| CN203172721U (en) * | 2013-02-27 | 2013-09-04 | 同济大学 | Integrated drive-by-wire independent steering double-trailing-arm suspension guide mechanism system |
-
2014
- 2014-04-14 CN CN201410146106.2A patent/CN103935203A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2196556A (en) * | 1936-07-10 | 1940-04-09 | Hollos Zsigmond | Vehicle axle suspension |
| GB752640A (en) * | 1953-11-14 | 1956-07-11 | Daimler Benz Ag | Improvements relating to motor vehicle axle suspensions |
| US5176398A (en) * | 1988-07-28 | 1993-01-05 | Mazda Motor Corp. | Vehicle rear suspension system |
| CN101342848A (en) * | 2008-08-15 | 2009-01-14 | 同济大学 | Double trailing arm type suspension fork wheel edge drive structure of new-type electric car |
| CN102774269A (en) * | 2012-07-14 | 2012-11-14 | 盐城工学院 | Unequal double-wishbone suspension wheel side driving device capable of achieving large-angle steering |
| CN102774267A (en) * | 2012-07-30 | 2012-11-14 | 同济大学 | Integrated double trailing arm suspension wheel-side electric driving system for steering wheel |
| CN102975613A (en) * | 2012-12-27 | 2013-03-20 | 上海瑞尔实业有限公司 | Independent suspension structure for driving bridge |
| CN203172721U (en) * | 2013-02-27 | 2013-09-04 | 同济大学 | Integrated drive-by-wire independent steering double-trailing-arm suspension guide mechanism system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112238895A (en) * | 2020-10-16 | 2021-01-19 | 中国北方车辆研究所 | Independent steering system with steering motor arranged on equal-length double-trailing-arm suspension knuckle |
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