CN104070953B - Rear axle assy - Google Patents
Rear axle assy Download PDFInfo
- Publication number
- CN104070953B CN104070953B CN201410249550.7A CN201410249550A CN104070953B CN 104070953 B CN104070953 B CN 104070953B CN 201410249550 A CN201410249550 A CN 201410249550A CN 104070953 B CN104070953 B CN 104070953B
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- rear axle
- rocker arm
- fixed
- frame
- axle assembly
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- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 230000035939 shock Effects 0.000 claims description 18
- 239000006096 absorbing agent Substances 0.000 claims description 16
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 208000020442 loss of weight Diseases 0.000 abstract 1
- 239000000725 suspension Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 239000013585 weight reducing agent Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- Vehicle Body Suspensions (AREA)
Abstract
The embodiment of the invention discloses a kind of rear axle assy, including back axle, two rear arms being symmetricly set in back axle both sides, and two spring dampers being arranged at above back axle.The first end of each rear arm be fixed on back axle by rocking arm fixture and with the axis perpendicular of back axle, the second end of rear arm is connected formation revolute pair with the first cross bar of vehicle frame.The upper surface of rear arm first end is fixed in the bottom of each spring damper, and its top is connected with body bottom.The comfortableness when present invention can strengthen stability when vehicle travels and take, and beneficially vehicle loss of weight and the advantage of realization miniaturization.
Description
Technical Field
The invention relates to the field of vehicles, in particular to a rear axle assembly for a vehicle with a non-independent suspension structure.
Background
The non-independent suspension in the vehicle is characterized in that wheels on two sides are connected by an integral axle, and the wheels and the axle are suspended below a vehicle frame or a vehicle body through an elastic suspension structure. The elastic suspension structure of a non-independent suspension structure vehicle in the current market mostly adopts a steel plate spring. Because the steel plate spring has higher rigidity, the steel plate spring has almost no shock absorption function when encountering bumpy road surfaces, and therefore, the comfort is poorer. Meanwhile, the steel plate spring suspension is heavy in structural weight and high in requirement on longitudinal length, and weight reduction and miniaturization of a vehicle are not facilitated.
Disclosure of Invention
The invention aims to provide a rear axle assembly for a vehicle with a non-independent suspension structure, which can improve the riding comfort of the vehicle and is beneficial to the weight reduction and the miniaturization of the vehicle.
According to an embodiment of the present invention, there is provided a rear axle assembly, including a rear axle, two rear rocker arms symmetrically disposed at both sides of the rear axle, and two spring dampers disposed above the rear axle;
the first end part of each rear rocker arm is fixed on the rear axle through a rocker arm fixing part and is vertical to the axle center of the rear axle, and the second end part of each rear rocker arm is connected with the first cross rod of the frame to form a rotating pair;
the bottom end of each spring shock absorber is fixed on the upper surface of the first end part of the rear rocker arm, and the top end of each spring shock absorber is connected with the bottom of the vehicle body.
And an included angle between the central line of the spring shock absorber and the central line of the rear rocker arm is smaller than 90 degrees.
Preferably, an included angle between a center line of the spring damper and a center line of the rear rocker arm is 80 degrees～And 87 degrees.
Further, the rear axle assembly further comprises:
and one end of the adjustable balancing rod is fixedly connected with the second cross rod of the frame, and the other end of the adjustable balancing rod is fixedly connected with the rear axle so as to connect the frame and the rear axle in the transverse direction and adjust the distance between two end parts of the rear axle and the center of the frame.
Preferably, a fixed angle steel is arranged on the second cross bar of the frame, a fixed plate extending along the longitudinal direction is arranged on the rear axle, one end of the adjustable balance bar is fixed on the fixed angle steel, and the other end of the adjustable balance bar is fixed on the fixed plate.
Preferably, the rear axle assembly comprises at least one of the following technical features:
the adjustable balancing rod comprises a thread adjusting rod body, a first ball head connecting piece and a second ball head connecting piece, wherein the first ball head connecting piece and the second ball head connecting piece are arranged at two ends of the thread adjusting rod body;
the spring shock absorber comprises a base, a fixed shaft hinged on the base and a spring sleeved on the fixed shaft; the base is fixed on the upper surface of the first end of the rear rocker arm.
Preferably, the rocker arm fixing part comprises a fixing seat with a single arch bridge-shaped longitudinal section and a bolt;
the upper plane of the fixed seat is fixed below the first end part of the rear rocker arm, and the concave part in the fixed seat is concavely embedded on the rear axle;
two ends of the fixed seat along the longitudinal direction are respectively provided with a through hole with the axis vertical to the axis of the rear axle; the first end part of the rear rocker arm is provided with two through holes of which the axes are in the same straight line with the axes of the two through holes on the fixed seat;
the bolt is respectively penetrated into the through hole at the first end part of the rear rocker arm and the through hole on the fixed seat and then is screwed into the rear axle, and the rear rocker arm is fixed on the rear axle; wherein,
the extending direction of the rear axle shaft center is transverse, and the direction vertical to the rear axle shaft center is longitudinal.
Preferably, the rear rocker arm is a square steel tube.
As a preferable technical scheme, the second end part of the rear rocker arm is connected with the first cross rod of the frame through a bolt to form a rotating pair.
Furthermore, a cushion pad is arranged between two sides of the second end part of the rear rocker arm and the bolt
According to the technical scheme, the rear rocker arm of the rear axle assembly is used for connecting the frame and the rear axle, when the wheels shake up and down along with the fluctuation of the ground, the vertical acting force of the wheels is converted into centripetal force rotating around the end point of the second end of the rear rocker arm through the rotating pair at the second end of the rear rocker arm, and the centripetal force acts on the spring shock absorber, so that the situation that the vehicle body shakes up and down along with the wheels is effectively avoided, and the effect of stabilizing the vehicle body is achieved. Meanwhile, the adjustable balance rod structure in the rear axle assembly enables the vehicle not to shake left and right, and further improves the stability of the vehicle and the riding comfort.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic illustration of the construction of a rear axle assembly which is a preferred embodiment of the present invention;
FIG. 2 illustrates a top view of the rear axle assembly of FIG. 1;
FIG. 3 shows a schematic view of the mounting of the rear rocker arm;
FIG. 4 is a schematic view showing the connection of the rear rocker arm to the rear axle and the spring damper
Illustration of the drawings: 1-rear axle, 2-rear rocker arm, 3-spring shock absorber, 4-adjustable balance rod, 5-first cross rod, 6-second cross rod, 7-rocker arm fixing piece, 31-base, 32-fixed shaft, 33-spring, 41-fixed angle steel, 42-fixed plate, 71-fixed seat and 72-fixed bolt.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The structure of the rear axle assembly of the present invention is explained in detail by the specific embodiments below.
Fig. 1 shows a schematic structural view of a rear axle assembly as a preferred embodiment of the present invention.
FIG. 2 illustrates a top view of the rear axle assembly of FIG. 1. As shown in fig. 1 and 2, the rear axle assembly includes a rear axle 1, two rear rocker arms 2 symmetrically disposed at two sides of the rear axle 1, and two spring dampers 3 disposed above the rear axle 1.
Fig. 3 shows a schematic view of the mounting of the rear rocker arm. As shown in fig. 3, a first end of each rear rocker arm 2 is fixed on the rear axle 1 through a rocker arm fixing member 7 and is perpendicular to the axle center of the rear axle 1, and a second end of each rear rocker arm 2 is connected with the first cross bar 5 of the vehicle frame to form a revolute pair. Preferably, the rear rocker arm in the embodiment of the invention is a square steel pipe. The rear rocker arm is made of square steel tubes only by way of example, and other hollow steel tube structures or solid steel structures fall into the protection scope of the invention.
Preferably, the two rear rocker arms in the present invention are mounted above the rear axle 1, which function to increase the minimum ground clearance of the rear axle 1.
For convenience of description, the direction of the axle center of the rear axle is defined as the transverse direction, and the direction perpendicular to the axle center of the rear axle is defined as the longitudinal direction.
In the embodiment of the present invention, the rocker arm fixing member 7 for fixedly connecting each rear rocker arm with the rear axle includes a fixing base 71 having a single arch bridge shape in longitudinal section and a bolt 72. As shown in fig. 4, the upper plane of the fixing seat 71 is welded or fixed below the first end of the rear rocker by other fixing forms, a concave portion in the fixing seat 71 is embedded in the rear axle 1, and two ends of the fixing seat 71 in the longitudinal direction are symmetrically located on two sides of the axle center of the rear axle. Preferably, the fixing base can be selected from a solid structure or a hollow structure with a transverse section such as an 'n' shape. Through holes with axes vertical to the axes of the rear axle are formed in the two end parts of the fixed seat, correspondingly, two through holes are formed in the first end part of the rear rocker arm, and the axes of the two through holes in the fixed seat are respectively on the same straight line. Bolts 72 are inserted into the two through holes at the first end part of the rear rocker arm, and the two bolts respectively penetrate through the through holes at the two ends of the fixed seat and then are screwed into the rear axle 1 to fix the rear rocker arm 2 on the rear axle 1. The structure of the rocker arm fixing member in the present embodiment is only exemplary, and any other structure capable of fixing the rear rocker arm to the rear axle falls within the scope of the present invention.
Preferably, the second end of the rear rocker arm 2 is connected with the first cross bar of the vehicle frame through a bolt to form a rotating pair. The frame in the preferred embodiment of the present invention includes a first cross bar 5 and a second cross bar 6. Of course, the frame including the first cross bar and the second cross bar is only exemplary, and when the frame is in other structures, the second end of the rear rocker arm is fixed to the corresponding part of the frame through a bolt, so long as the center line of the rear rocker arm 2 is perpendicular to the axis of the rear axle.
Further, a cushion pad is arranged between two sides of the second end part of each rear rocker arm and the bolt. Preferably, the cushion pad of the present invention is made of rubber material, and functions to prevent the rear rocker arm 2 from being rigidly connected to the bolt, and to perform a flexible cushion function.
During the running process, the vehicle can continuously shake up and down along with the fluctuation of the ground. Because the direct contact point of the vehicle and the ground is the wheel, when the wheel shakes up and down, the vertical acting force of the wheel is converted into centripetal force rotating around the end point of the second end of the rear rocker arm through the rotating pair at the second end of the rear rocker arm, so that the vehicle body is effectively prevented from shaking up and down along with the wheel, and the effect of stabilizing the vehicle body is achieved. Meanwhile, a cushion pad is arranged between the two sides of the second end part of each rear rocker arm and the bolt to increase a rubber cushion pad, so that the stability of the vehicle in the driving process can be further increased, and passengers can feel more comfortable in the riding process.
In the present invention, the bottom end of each spring damper 3 is fixed to the upper surface of the first end portion of the rear rocker arm 2, and the top end of each spring damper 3 is connected to the bottom of the vehicle body. Preferably, as shown in fig. 4, the spring damper 3 of the present invention includes a base 31, a fixed shaft 32 hinged to the base, and a spring 33 sleeved on the fixed shaft. Wherein the base of the spring damper 3 is fixed to the upper surface of the first end of the rear swing arm 2. The angle between the centerline of the spring damper and the centerline of the rear rocker arm is preferably less than 90 degrees. Specifically, the angle between the center line of the spring damper 3 and the center line of the rear rocker arm 2 may be 80 to 87 degrees. Experiments prove that when the included angle between the central line of the spring damper 3 and the central line of the rear rocker arm 2 is 82 degrees, the damping effect is optimal.
In the invention, the included angle between the central line of the spring shock absorber 3 and the central line of the rear rocker arm 2 is set to be less than 90 degrees, because when a vehicle runs on a fluctuant road surface, the rear rocker arm converts the vertical acting force of the vertical jolt of the wheel into centripetal force through the revolute pair, and the instantaneous motion direction of the wheel is converted into the tangential direction rotating around the end point of the second end of the rear rocker arm. The center line of the spring shock absorber is parallel to the tangential direction of the wheel rotating around the end point of the second end of the rear rocker arm, and the spring shock absorber can bear the pressure of the wheel on the maximum contact area, so that the shock absorption effect can be realized to the maximum extent.
Further, the rear axle assembly of the present invention further includes an adjustable stabilizer bar 4 located between the two rear rocker arms 2. An adjustable balance bar 4 is located between the two rear rocker arms 2. Preferably, one end of the adjustable balance bar 4 in the invention is fixedly connected with the second cross bar of the frame, and the other end is fixedly connected with the rear axle. The adjustable balancing rod 4 is used for connecting the frame and the rear axle and can realize the connection of the frame and the rear axle in the transverse direction.
In a preferred embodiment, the adjustable stabilizer bar 4 is fixedly connected to the frame and the rear axle 1 via a fixed angle 41 and a fixed plate 42, respectively. Specifically, the fixing angle 41 is disposed on the second cross bar of the frame, and the fixing plate 42 is fixed to the rear axle 1 and extends in the longitudinal direction. Preferably, the fixed angle steel is close to the rear rocker arm on one side, and the fixed plate is close to the rear rocker arm on the other side. One end of the adjustable balancing pole 4 is fixed on the fixed angle steel, and the other end is fixed on the fixed plate. The adjustable stabilizer bar 4 has a certain extension in the transverse direction. The adjustable balance bar 4 is connected with the frame and the rear axle through the fixed angle steel and the fixed plate, and all the fixed structural members capable of fixing the adjustable balance bar 4 between the frame and the rear axle fall into the protection scope of the invention.
As a preferred embodiment of the embodiments, the adjustable balance bar 4 of the present invention comprises a threaded adjustment bar body and a first ball head connecting member and a second ball head connecting member disposed at both ends of the threaded adjustment bar body. The first ball head connecting piece is fixed on the fixed angle steel, and the second ball head connecting piece is fixed on the fixed plate. The adjustable balancing rod 4 is used for transversely connecting the rear axle and the frame, and the distance between two ends of the rear axle and the center of the frame is adjusted through the threaded adjusting rod body.
The adjustable balance bar has the advantages that: 1. the rear axle is connected with the automobile body through the rear rocker arm, and the direction of setting up of rear rocker arm is perpendicular with the rear axle, can not guarantee that the rear axle rocks in the horizontal direction. One end of the balancing rod is fixed on the vehicle frame close to the left rear rocker arm, and the other end of the balancing rod is fixed at one end of the rear axle close to the right rear rocker arm, so that the balancing rod can be adjusted to fix the rear axle and the vehicle frame in the horizontal direction, the rear axle is guaranteed not to shake in the horizontal direction, and the stability of the vehicle during running is further improved. 2. When the vehicle is used for a period of time, the rear axle has a certain dislocation, namely is not symmetrical relative to the center line of the vehicle. When the two ends of the rear axle are not symmetrical about the center line of the vehicle, the driving feeling of the vehicle is deteriorated, and the vehicle is likely to shake left and right. The adjustable balancing pole can be when vehicle maintenance, and the regulation to the rear axle of manual realization makes rear axle both ends about vehicle central line symmetry, avoids the vehicle to produce when going and rocks about controlling.
Therefore, the rear rocker arm of the rear axle assembly is used for connecting the frame and the rear axle, when the wheels shake up and down along with the fluctuation of the ground, the vertical acting force of the wheels is converted into centripetal force rotating around the end point of the second end of the rear rocker arm by the rotating pair at the second end of the rear rocker arm, and the centripetal force acts on the spring shock absorber, so that the vehicle body is effectively prevented from shaking up and down along with the wheels, and the effect of stabilizing the vehicle body is achieved. Meanwhile, the adjustable balance rod structure in the rear axle assembly enables the vehicle not to shake left and right, and further improves the stability of the vehicle and the riding comfort.
Because the rear rocker arm and the spring shock absorber are adopted to replace an elastic suspension structure of a plate spring shock absorber used in the existing vehicle, the invention has the advantages of enhancing the comfort of the vehicle, being beneficial to the weight reduction of the vehicle and realizing the miniaturization.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A rear axle assembly comprises a rear axle and is characterized by further comprising two rear rocker arms symmetrically arranged on two sides of the rear axle and two spring shock absorbers arranged above the rear axle;
the first end part of each rear rocker arm is fixed on the rear axle through a rocker arm fixing part and is vertical to the axle center of the rear axle, and the second end part of each rear rocker arm is connected with the first cross rod of the frame to form a rotating pair;
the bottom end of each spring shock absorber is fixed on the upper surface of the first end part of the rear rocker arm, and the top end of each spring shock absorber is connected with the bottom of the vehicle body;
the rear axle assembly further comprises an adjustable balance rod, one end of the adjustable balance rod is fixedly connected with the second cross rod of the frame, and the other end of the adjustable balance rod is fixedly connected with the rear axle so as to connect the frame and the rear axle in the transverse direction and adjust the distance between the two end parts of the rear axle and the center of the frame.
2. The rear axle assembly of claim 1, wherein an angle between a centerline of the spring damper and a centerline of the rear rocker arm is less than 90 degrees.
3. The rear axle assembly of claim 2, wherein an angle between a centerline of the spring damper and a centerline of the rear rocker arm is between 80 degrees and 87 degrees.
4. The rear axle assembly according to claim 1, wherein a second cross bar of the frame is provided with a fixed angle steel, the rear axle is provided with a fixed plate extending in a longitudinal direction, one end of the adjustable balance bar is fixed to the fixed angle steel, and the other end of the adjustable balance bar is fixed to the fixed plate.
5. The rear axle assembly according to claim 1, characterized by comprising at least one of the following technical features:
the adjustable balancing rod comprises a thread adjusting rod body, a first ball head connecting piece and a second ball head connecting piece, wherein the first ball head connecting piece and the second ball head connecting piece are arranged at two ends of the thread adjusting rod body;
the spring shock absorber comprises a base, a fixed shaft hinged on the base and a spring sleeved on the fixed shaft; the base is fixed on the upper surface of the first end of the rear rocker arm.
6. The rear axle assembly of claim 1, wherein the rocker arm securing member includes a securing base having a single arch bridge shape in longitudinal cross-section and a bolt;
the upper plane of the fixed seat is fixed below the first end part of the rear rocker arm, and the concave part in the fixed seat is concavely embedded on the rear axle;
two ends of the fixed seat along the longitudinal direction are respectively provided with a through hole with the axis vertical to the axis of the rear axle; the first end part of the rear rocker arm is provided with two through holes of which the axes are in the same straight line with the axes of the two through holes on the fixed seat;
the bolt is respectively penetrated into the through hole at the first end part of the rear rocker arm and the through hole on the fixed seat and then is screwed into the rear axle, and the rear rocker arm is fixed on the rear axle; wherein,
the extending direction of the rear axle shaft center is transverse, and the direction vertical to the rear axle shaft center is longitudinal.
7. The rear axle assembly of claim 6, wherein the rear rocker arm is a square steel tube.
8. The rear axle assembly of claim 1, wherein the second end of the rear rocker arm is bolted to the first cross bar of the vehicle frame to form a revolute pair.
9. The rear axle assembly of claim 8, wherein a cushion is disposed between the bolt and both sides of the second end of the rear rocker arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410249550.7A CN104070953B (en) | 2014-06-06 | 2014-06-06 | Rear axle assy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410249550.7A CN104070953B (en) | 2014-06-06 | 2014-06-06 | Rear axle assy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104070953A CN104070953A (en) | 2014-10-01 |
| CN104070953B true CN104070953B (en) | 2017-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410249550.7A Expired - Fee Related CN104070953B (en) | 2014-06-06 | 2014-06-06 | Rear axle assy |
Country Status (1)
| Country | Link |
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| CN (1) | CN104070953B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105774995B (en) * | 2014-12-24 | 2019-03-22 | 卫美恒(苏州)医疗器械有限公司 | A kind of scooter |
| CN105799440A (en) * | 2016-03-17 | 2016-07-27 | 深圳市神州云海智能科技有限公司 | Hanging mechanism |
| CN110116598A (en) * | 2018-02-07 | 2019-08-13 | 郑州宇通客车股份有限公司 | A kind of suspension system and the vehicle using the suspension system |
| CN108556916A (en) * | 2018-06-15 | 2018-09-21 | 长沙行深智能科技有限公司 | A kind of vehicle chassis |
| CN109484111A (en) * | 2018-12-15 | 2019-03-19 | 杭州容大智造科技有限公司 | A kind of trailing arm for suspension |
| CN109515094A (en) * | 2018-12-29 | 2019-03-26 | 新乡市合众鑫辉车业有限公司 | A kind of electric car rear suspension structure |
| CN110254156A (en) * | 2019-07-05 | 2019-09-20 | 吴桃 | The damping device of five wheel vehicles |
| CN112693551B (en) * | 2020-12-31 | 2022-05-31 | 台州市佑吉车业科技股份有限公司 | Electric tricycle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152724A (en) * | 2011-03-09 | 2011-08-17 | 奇瑞汽车股份有限公司 | Transverse stabilizer bar device of automobile |
| CN102717857A (en) * | 2012-06-29 | 2012-10-10 | 重庆建设摩托车股份有限公司 | Independent front suspension structure of all-terrain four-wheel motorcycle |
| CN203888563U (en) * | 2014-06-06 | 2014-10-22 | 娄底市大丰和电动车辆有限公司 | Rear axle assembly |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202088859U (en) * | 2011-05-31 | 2011-12-28 | 江苏伊美吉电动车辆制造有限公司 | Independent rear suspension transmission device of electric vehicle |
| CN103640658A (en) * | 2013-12-07 | 2014-03-19 | 刘景物 | Shock absorption system for rear axle of electro-tricycle |
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2014
- 2014-06-06 CN CN201410249550.7A patent/CN104070953B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102152724A (en) * | 2011-03-09 | 2011-08-17 | 奇瑞汽车股份有限公司 | Transverse stabilizer bar device of automobile |
| CN102717857A (en) * | 2012-06-29 | 2012-10-10 | 重庆建设摩托车股份有限公司 | Independent front suspension structure of all-terrain four-wheel motorcycle |
| CN203888563U (en) * | 2014-06-06 | 2014-10-22 | 娄底市大丰和电动车辆有限公司 | Rear axle assembly |
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| CN104070953A (en) | 2014-10-01 |
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Granted publication date: 20170104 Termination date: 20210606 |