CN206436761U - A kind of suspension system and the vehicle using the suspension system - Google Patents
A kind of suspension system and the vehicle using the suspension system Download PDFInfo
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- CN206436761U CN206436761U CN201621424119.2U CN201621424119U CN206436761U CN 206436761 U CN206436761 U CN 206436761U CN 201621424119 U CN201621424119 U CN 201621424119U CN 206436761 U CN206436761 U CN 206436761U
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- vehicle bridge
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- suspension system
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Abstract
The utility model is related to a kind of suspension system and the vehicle using the suspension system, suspension system includes vehicle bridge, also including one end is used to be hinged with vehicle frame, the flexible member that the other end is hinged with vehicle bridge, the hinge axes of flexible member and vehicle bridge extend in left-right direction, the flexible member is arranged in pairs and the central axis of each flexible member is each perpendicular to the vehicle bridge, another central axis that turns forward from bottom to top of a central axis in each pair flexible member is tilted backwards and angle of inclination is identical from bottom to top, a plane included angle or antarafacial angle a are formed between the central axis of each pair flexible member, the plane included angle or antarafacial angle a size are 0 ~ 90 °.The utility model, which solves suspension system in the prior art and can not change vehicle bridge rigidity in time according to road conditions, causes that vehicle ride performance is poor, the technical problem of riding comfort difference.
Description
Technical field
The utility model is related to a kind of suspension system and the vehicle using the suspension system.
Background technology
Elastic damping system is provided with vehicle suspension, in the presence of elastic damping system, vehicle can decay rapidly
Shock and vibration from road surface, and then improve the ride performance of vehicle and the riding comfort of passenger.
The rigidity of the vehicle suspension of elastic damping system influence, in order to ensure riding comfort and ride performance, according to
Different traveling road conditions elastic damping systems needs the rigidity of adjustment suspension in real time, when vehicle runs into pit, the vehicle bridge of vehicle
Move down, it is necessary to reduce the rigidity of suspension, when vehicle runs into projection, jump, now needs the rigidity of suspension to increase in the vehicle bridge of vehicle
Greatly.In order to reach this purpose, the Chinese invention that such as date of publication is 2012.06.12, publication No. is CN 102678808A is special
Profit application discloses the vibration insulating system of a kind of rigidity and damping joint regulation, and the vibration insulating system includes flexible member and damping member
Part, damping element is damper, and flexible member is air spring, and damper is magneto-rheological vibration damper, air spring and shock absorber
It is arranged in parallel between suspension upper junction plate and suspension bottom plate, when suspension is arranged on vehicle, suspension bottom plate is fixed with vehicle bridge to be connected
Connect, suspension upper junction plate on the downside of vehicle body with fixing with bearing vehicle body weight, and upper bracket and the suspension upper junction plate of air spring are consolidated
Fixed connection, air spring lower carriage is connected with suspension bottom plate, and shock absorber upper bracket is hinged with suspension upper junction plate, is propped up under shock absorber
Frame is hinged with suspension bottom plate.Be connected to auxiliary chamber and air supply system on air spring, air spring and auxiliary chamber it
Between be provided with location control valve, between air spring and air supply system be provided with levelling valve, levelling valve by control-rod control,
Control-rod one end is connected with levelling valve, and the other end is hinged with suspension bottom plate, under different carrying operating modes, at the beginning of air spring
Beginning, operating position was controlled to adjust by levelling valve, and when air spring is in compression or extended state, cover degree control valve exists
The charge valve or air bleeding valve in it are opened under control-rod effect, air supply system is inflated or is vented into air spring, works as air
Spring returns to its equilbrium position, and valve is closed, and so can ensure that the impulse stroke of air spring near its equilbrium position.
Although above-mentioned vibration insulating system can change the rigidity of suspension, due to the vibration insulating system by air supply system to
Air spring is inflated or is vented to control the rigidity of suspension, and inflation or exhaust have Valve controlling, therefore, inflate or are vented
The delay of certain time occurs, above-mentioned vibration insulating system can not change the rigidity of vehicle suspension in time, and vehicle is running over journey
In there are still the technical problem that vehicle ride performance is poor, riding comfort is poor.Meanwhile, above-mentioned vibration insulating system when mounted,
Not only need that air spring is installed, connect air supply system and auxiliary chamber on air spring, and need to air supply system and
Auxiliary chamber carry out installation fixation, levelling valve is also set between air spring and air supply system, air spring with
Location control valve is set between auxiliary chamber, and levelling valve will also connect control-rod by control-rod control on suspension, because
This, if setting above-mentioned vibration insulating system on a vehicle suspension, not only installation process is sufficiently complex cumbersome, and air spring is attached
It is that vehicle chassis increases burden plus structure can take very big space.Further, since the additional structure of above-mentioned vibration insulating system compared with
It is many so that the structure of vibration insulating system is complex, it is not easy to repair and maintains, and then the expense of maintenance may be increased.
The content of the invention
The purpose of this utility model is to provide a kind of suspension system, can not to solve suspension system in the prior art
Change suspension rate in real time according to road conditions and cause the technical problem that vehicle ride performance is poor, riding comfort is poor.
To achieve the above object, the technical solution of the utility model is：
A kind of suspension system, including vehicle bridge, in addition to one end with vehicle frame for being hinged, the elasticity that the other end and vehicle bridge are hinged
The hinge axes of element, flexible member and vehicle bridge extend in left-right direction, and the flexible member is arranged in pairs and each flexible member
A central axis being each perpendicular in the vehicle bridge, each pair flexible member of central axis turn forward another from bottom to top
Central axis is tilted backwards from bottom to top and angle of inclination is identical, and a plane is formed between the central axis of each pair flexible member
Angle or antarafacial angle a, the plane included angle or antarafacial angle a size are 0 ~ 90 °.
The central axis of each pair flexible member is in same plane and is articulated with vehicle bridge at same position, each pair elasticity
A plane included angle is formed between the central axis of element.
Also include damper, the damper includes being oriented to dress up and down in the cylinder body for being used to be connected with vehicle frame, the cylinder body
Equipped with piston, cylinder body surrounds sealed upper plenum and lower cavity with piston, and piston is connected with the driving lever radially extended, driving lever and car
Bridge is connected and guiding movement above and below piston can be stirred along with moving up and down for vehicle bridge.
The damper is air damper or oil damper.
The flexible member is helical spring.
A kind of vehicle, including vehicle frame and suspension system, the suspension system include the vehicle bridge that axis extends in left-right direction,
Also include one end and vehicle frame and be hinged the flexible member that one end is hinged with vehicle bridge, the hinge axes of flexible member and vehicle bridge are along right and left
To extension, the flexible member is arranged in pairs and the central axis of each flexible member is each perpendicular to the vehicle bridge, each pair elasticity member
Another central axis that turns forward from bottom to top of a central axis in part is tilted backwards and angle of inclination phase from bottom to top
Together, a plane included angle or antarafacial angle a, the plane included angle or different are formed between the central axis of each pair flexible member
Face angle a size is 0 ~ 90 °.
The central axis of each pair flexible member is in same plane and is articulated with vehicle bridge at same position, each pair elasticity
A plane included angle is formed between the central axis of element.
Also include damper, the damper, which includes being oriented to up and down in the cylinder body being connected with vehicle frame, the cylinder body, to be equipped with
Piston, cylinder body surrounds sealed upper plenum and lower cavity with piston, and piston is connected with the driving lever radially extended, and driving lever is consolidated with vehicle bridge
Connect and guiding movement above and below piston can be stirred along with moving up and down for vehicle bridge.
The damper is air damper or oil damper.
The flexible member is helical spring.
The beneficial effects of the utility model are：The utility model is hinged flexible member, elasticity member between vehicle frame and vehicle bridge
Part and the hinge axes of vehicle frame and vehicle bridge extend in left-right direction, consistent with the axis bearing of trend of vehicle bridge, and elasticity member
The central axis of part is each perpendicular to vehicle bridge, and the power that flexible member is acted in vehicle bridge is all the time perpendicular to vehicle bridge.Flexible member is paired
Set, a central axis in each pair flexible member is turned forward from bottom to top, and another is tilted backwards from bottom to top, and
Both inclined angles are equal, it is ensured that the amount of force that each pair flexible member is acted in vehicle bridge after suspension system entrucking
It is equal, and the resultant direction that acts in vehicle bridge of each pair flexible member is all the time downwards, so when vehicle passes through concavo-convex road
During face, it is ensured that vehicle bridge is moved up and down relative to vehicle frame, without being offset before and after occurring.And when vehicle bridge bob, elasticity
Element can be shunk with the movement of vehicle bridge in real time, and then the stiffness coefficient of suspension system is adjusted in time.Such as work as car
When passing by recessed road surface, vehicle bridge is moved down relative to vehicle frame, flexible member specific elongation, is put down formed by each pair flexible member
Face angle or antarafacial angle are reduced, the suspension rate increase of vehicle, can so reduce vehicle excessively recessed road surface when lower jump amount,
Improve ride performance and riding comfort.When vehicle is through excess convexity road surface, vehicle bridge can be moved up relative to vehicle frame, elasticity member
Part, which is pressurized, to be shortened, and the increase of each pair flexible member angle causes the suspension rate of vehicle to reduce, and vehicle bridge quickly upper can be jumped,
To ensure the stationarity of vehicle frame.
As further improvement of the utility model, the piston in the cylinder body of damper surrounds sealed upper plenum with cylinder body
With lower cavity, one end and the vehicle bridge of driving lever are connected, and the other end is connected with piston, and when vehicle bridge is moved up and down, driving lever is with vehicle bridge one
Rise and move up and down and then promote piston to move up and down, the excitation information on road surface mechanically passes to damper in real time,
The identification of road surface operating mode is realized in the case of without ECU, it is ensured that rigidity and damping are adjusted to most in real time with road excitation simultaneously
Good state.In the utility model, flexible member and damper synergy, when vehicle bridge bob, flexible member changes outstanding
The rigidity of frame, damper can decay the axle vibraqtions caused by road excitation in real time, and then improve the ride performance of vehicle
And riding comfort.
Brief description of the drawings
Fig. 1 is the rough schematic view of vehicle in the utility model embodiment 1；
Fig. 2 is the rough schematic view of damper in Fig. 1；
In figure：1st, vehicle frame, the 2, first helical spring, the 3, second helical spring, 4, vehicle bridge, 5, cylinder body, 6, driving lever, 7, living
Plug, 8, sealing ring.
Embodiment
Embodiment of the present utility model is described further below in conjunction with the accompanying drawings.
A kind of specific embodiment 1 of vehicle of the utility model, as shown in Figure 1 and Figure 2, the vehicle include vehicle frame 1 and suspension system
System, suspension system is arranged on vehicle frame 1, and vehicle frame 1 is used for bearing vehicle body weight.Suspension system extends in left-right direction including axis
Vehicle bridge 4, perpendicular to the direction of paper be left and right directions in figure；Suspension system also includes flexible member and damping element, elasticity
Element is the helical spring being hinged between vehicle frame 1 and vehicle bridge 4, and helical spring is arranged in pairs；In the present embodiment, a left side for vehicle bridge 4
Right two ends respectively set a pair of helical springs, and each pair helical spring includes the first helical spring 2, the second helical spring 3, the first spiral shell
Revolve spring 2, the second helical spring 3 parameter it is identical.First helical spring, the second helical spring are obliquely installed and central axis
Vehicle bridge 4 is each perpendicular to, the central axis of the first helical spring 2 turns forward from bottom to top, the central axis of the second helical spring 3
Tilt backwards from bottom to top.First helical spring 2, the upper end of the second helical spring 3 and vehicle frame 1 are hinged, and two pin joints are on car
Symmetrical before and after bridge 4, hinge axes extend in left-right direction.The lower end of first helical spring 2 and the second helical spring 3 is by being hinged
Support is hinged with the realization of vehicle bridge 4, i.e. fixed support in vehicle bridge 4, and the first helical spring 2 and the second helical spring 3 are articulated with support
On same position at, hinge axes and vehicle bridge diameter parallel.In the central axis of two helical springs is generally aligned in the same plane, so
The pin joint of the pin joint of first, second helical spring and vehicle frame 1, first, second helical spring and vehicle bridge 4 is in isosceles triangle
Distribution, if forming plane included angle a between the central axis of first, second helical spring.In other embodiments, first, second
The pin joint of helical spring and vehicle bridge 4 can axially offsetting along vehicle bridge, first, second helical spring is articulated with the difference in vehicle bridge
At position, the central axis antarafacial of such first, second helical spring, shape between the central axis of first, second helical spring
Into antarafacial angle.
When vehicle bridge 4 is moved upwards relative to vehicle frame 1, first, second helical spring, which is pressurized, to be shunk, first, second spiral
Spring swings downwards the plane holder formed between identical angle, first, second helical spring rotating around the pin joint with vehicle bridge 4
The angle a number of degrees can increase；When vehicle bridge 4 is moved downward relative to vehicle frame 1, the elongation of first, second helical spring, first, second spiral shell
The plane holder that rotation spring is swung up being formed between equal angular, first, second helical spring rotating around the pin joint with vehicle bridge 4
The angle a number of degrees can reduce.Plane included angle a angle can change during vehicle bridge bob, and plane included angle a size is 0 ° ~ 90 °.If
Vehicle is under normally travel state, and the vehicle bridge 4 of vehicle understands the directed force F by ground upwardlyN, two helical springs 2 obliquely
Elastic force FS, vehicle bridge be in poised state, pass through force analysis：The component sum vertically of two helical springs with
Directed force FNIt is equal in magnitude, that is to say, that 2FS·cos（a/2）=FNIf the original length of helical spring is L1, after entrucking
Instantaneous length is L0, and coefficient of elasticity is K, is therefore deduced that：
FN=2K·cos（a/2）·（L1-L0）
Wherein,（L1-L0）For the deformation quantity of helical spring, 2Kcos（a/2）For the constant term of helical spring deformation quantity,
The constant term is the suspension rate C of vehicle, i.e. C=2Kcos（a/2）.
The damping element of the suspension system is air damper, one damper of every a pair of flexible members correspondence, damper
Including cylinder body 5, cylinder body 5 is fixedly mounted on vehicle frame 1, is oriented to up and down in cylinder body 5 and is equipped with piston 7, piston 7 includes upper piston plate
With lower piston plate, upper piston plate surrounds closed upper plenum with cylinder body 5, and lower piston plate surrounds closed lower cavity with cylinder body, on
Sealing ring 8 is equipped with piston plate and lower piston plate, it is ensured that the seal of damper；Sealing ring 8 carries lubricating oil, reduces and lives
Resistance during plug motion.Upper piston plate and lower piston plate are fixed together by connecting rod, upper piston plate, lower piston plate with
Cylinder body surrounds middle cavity, and the side wall of middle cavity, which is provided with side opening, vehicle bridge 4, is installed with driving lever 6, and driving lever 6 is penetrated by side opening
It is connected in middle cavity and along the radial direction of piston 7 with piston 7；When vehicle bridge is moved up and down, driving lever is moved up and down simultaneously with vehicle bridge
Promote piston 7 to move up and down, when piston 7 is moved up, air in upper plenum is pressurized, the air in lower cavity by tension,
Upper piston plate and lower piston plate are respectively by downward active force；Conversely, the air in the air tension in upper plenum, lower cavity
It is pressurized, upper piston plate and lower piston plate are respectively by upward active force.During driving lever 6 is moved up and down with vehicle bridge 4,
To avoid driving lever 6 by along its axial pulling force or pressure, the horizontally-guided of driving lever 6 be installed on upper piston plate and lower piston plate it
Between connecting rod on, realize driving lever 6 and piston 7 and be flexibly connected.In the present embodiment, the upper plenum of cylinder body 5 in lower cavity with filling out
Inflated with nitrogen, gas measurement device of the border of sealing ring 8 with measurement nitrogen flowing, gas measurement device is connected with alarm, such as
Gases did escape in fruit upper plenum and lower cavity, gas measurement device just can detect that, and by alarm to driver
Alarm signal is sent, human pilot is timely found whether the air-tightness of damper is good, it is ensured that the peace of vehicle traveling
Quan Xing.In the present embodiment, cylinder body 5 is monolithic construction, in other embodiments, and cylinder body can also include the upper gas that split is set
Be oriented in cylinder and lower cylinder, upper cylinder and be provided with upper piston, be oriented in lower cylinder and be provided with lower piston, upper piston, lower piston respectively with
Upper cylinder, lower cylinder surround closed upper plenum and lower cavity, are connected between upper piston and lower piston by connecting rod.
The damping force F of damper=（P1-P0）·S
In formula：P1 is the pressure sum of cylinder body upper plenum and lower cavity, and P0 is ambient atmosphere pressure, and S is the face of piston plate
Product；Wherein P1, P0 change speed depend on the rate of change of damper volume, when vehicle bridge beats very fast up or down,
The rate of change of volume of air increased dramatically in damper, and damping force F will increased dramatically, it is possible to achieve rapid decay vibrates
Amount, it is ensured that the smooth ride of vehicle, ride comfort.
When vehicle is by recessed road surface, the meeting relative frame 1 of vehicle bridge 4 is beated downwards, between first, second helical spring
Plane included angle a can reduce, cos（a/2）Value increase, and then cause the suspension rate C of vehicle to increase；With 4 times jump amounts of vehicle bridge
Constantly increase, the suspension rate C of vehicle also constantly increases, can so reduce vehicle excessively recessed road surface when lower jump amount, it is ensured that vehicle body
Stability.Meanwhile, jumped as vehicle bridge is constantly lower, the damping force that damper is produced drastically increases with the increase of lower hop rate degree
Greatly, when vehicle runs into big recessed road surface, damper can produce larger damping force and decay caused by road excitation rapidly
Vehicular vibration, improves vehicle ride performance and riding comfort.
When vehicle is by raised road surface, vehicle bridge 4 can upwards beat relative to vehicle frame 1, between first, second helical spring
Plane included angle a increase, cos（a/2）Value reduces, and causes vehicle suspension rate C to reduce, and the relative frame of vehicle bridge 4 is quickly upper to jump, and
Ensure the stability of vehicle frame 1.Jump the damping force for causing damper to produce simultaneously on vehicle bridge is quick also to increased dramatically, vehicle bridge will not
Generation is significantly vibrated, and weakens Vibration Condition of vehicle when by raised road surface, improves the ride performance of vehicle and takes and relaxes
Adaptive.
In summary two kinds of situations, the suspension system is when vehicle is by concave-convex road surface, and flexible member realizes suspension rate
As road conditions are adjusted in real time, damping element can rapid decay vehicle axle vibraqtions caused by road excitation, the suspension system carries
The ride performance and riding comfort of high vehicle, with great use value.
In other embodiment, multipair helical spring, every a pair of helical springs correspondence can be arranged along the axially spaced-apart of vehicle bridge
One damper.Can also multipair helical spring be one group, the left and right ends of vehicle bridge respectively set one group of helical spring, every group of spiral
Spring is articulated with the same position of vehicle bridge and is correspondingly arranged a damper, and every group of helical spring is around the circumferential wrong of vehicle bridge
Open, and ensure a central axis in every a pair of helical springs turn forward from bottom to top another central axis from lower and
On tilt backwards and angle of inclination is identical.Each pair helical spring can be articulated with same position with vehicle bridge, it is ensured that each pair spiral bullet
The central axis of spring is in same plane, and each pair helical spring can also axially offset setting along vehicle bridge.Helical spring is also
It could alternatively be gas spring.When mounted, the upper end of spring element directly can be hinged the suspension system with vehicle frame, can also be by
Articulated stand or connecting plate, connecting bridge and vehicle frame, which are realized, to be hinged, and such as flexible member upper end is hinged with connecting plate or connecting bridge,
Then connecting plate or connecting bridge are fixed on bottom of frame；Damper can directly be fixedly mounted on bottom of frame, can also borrow
Connecting bridge is helped to be connected with vehicle frame.Air damper may be replaced by oil damper.
The embodiment of the utility model suspension system, the structure of the suspension system and the suspension knot in above-mentioned vehicle embodiments
Structure is identical, to avoid repeating, will not be described here.
Claims (10)
1. a kind of suspension system, including vehicle bridge, it is characterised in that：Also include one end and be used to being hinged with vehicle frame, the other end and vehicle bridge
The hinge axes of the flexible member being hinged, flexible member and vehicle bridge extend in left-right direction, the flexible member be arranged in pairs and
The central axis of each flexible member is each perpendicular to a central axis in the vehicle bridge, each pair flexible member from bottom to top forward
Tilt that another central axis is tilted backwards from bottom to top and angle of inclination is identical, shape between the central axis of each pair flexible member
Into a plane included angle or antarafacial angle a, the plane included angle or antarafacial angle a size are 0 ~ 90 °.
2. suspension system according to claim 1, it is characterised in that：The central axis of each pair flexible member is in same flat
It is articulated with face and with vehicle bridge at same position, a plane included angle is formed between the central axis of each pair flexible member.
3. suspension system according to claim 1, it is characterised in that：Also include damper, the damper includes being used for
The cylinder body being connected with vehicle frame, is oriented in the cylinder body and is equipped with piston up and down, cylinder body and piston surround sealed upper plenum and under
Cavity, piston is connected with the driving lever radially extended, and driving lever is connected and can dialled along with moving up and down for vehicle bridge with vehicle bridge
Guiding movement above and below piston.
4. suspension system according to claim 3, it is characterised in that：The damper is air damper or oil damping
Device.
5. the suspension system according to claim 1-4 any one, it is characterised in that：The flexible member is spiral bullet
Spring.
6. a kind of vehicle, including vehicle frame and suspension system, the suspension system include the vehicle bridge that axis extends in left-right direction, its
It is characterised by：Also include the jointed shaft that one end is hinged the flexible member that one end is hinged with vehicle bridge, flexible member and vehicle bridge with vehicle frame
Line extends in left-right direction, and the flexible member is arranged in pairs and the central axis of each flexible member is each perpendicular to the vehicle bridge,
A central axis in each pair flexible member turn forward from bottom to top another central axis tilt backwards from bottom to top and
Angle of inclination is identical, and a plane included angle or antarafacial angle a, the plane are formed between the central axis of each pair flexible member
Angle or antarafacial angle a size are 0 ~ 90 °.
7. vehicle according to claim 6, it is characterised in that：The central axis of each pair flexible member is in same plane
And be articulated with vehicle bridge at same position, a plane included angle is formed between the central axis of each pair flexible member.
8. vehicle according to claim 6, it is characterised in that：Also include damper, the damper includes connecting with vehicle frame
It is oriented to up and down in the cylinder body connect, the cylinder body and is equipped with piston, cylinder body surrounds sealed upper plenum and lower cavity, piston with piston
The driving lever radially extended is connected with, driving lever is connected and can stirred along with moving up and down for vehicle bridge above and below piston with vehicle bridge
Guiding movement.
9. vehicle according to claim 8, it is characterised in that：The damper is air damper or oil damper.
10. the vehicle according to claim 6-9 any one, it is characterised in that：The flexible member is helical spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621424119.2U CN206436761U (en) | 2016-12-23 | 2016-12-23 | A kind of suspension system and the vehicle using the suspension system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621424119.2U CN206436761U (en) | 2016-12-23 | 2016-12-23 | A kind of suspension system and the vehicle using the suspension system |
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| Publication Number | Publication Date |
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| CN206436761U true CN206436761U (en) | 2017-08-25 |
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ID=59647924
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621424119.2U Active CN206436761U (en) | 2016-12-23 | 2016-12-23 | A kind of suspension system and the vehicle using the suspension system |
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| CN (1) | CN206436761U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108237861A (en) * | 2016-12-23 | 2018-07-03 | 郑州宇通客车股份有限公司 | Suspension system and the vehicle using the suspension system |
| CN110588269A (en) * | 2019-09-04 | 2019-12-20 | 浙江工业大学 | Hydro-pneumatic suspension mechanism for dump truck |
-
2016
- 2016-12-23 CN CN201621424119.2U patent/CN206436761U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108237861A (en) * | 2016-12-23 | 2018-07-03 | 郑州宇通客车股份有限公司 | Suspension system and the vehicle using the suspension system |
| CN108237861B (en) * | 2016-12-23 | 2023-12-15 | 宇通客车股份有限公司 | Suspension system and vehicle using same |
| CN110588269A (en) * | 2019-09-04 | 2019-12-20 | 浙江工业大学 | Hydro-pneumatic suspension mechanism for dump truck |
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Address after: 450061 Yudao Road, Guancheng District, Zhengzhou City, Henan Province Patentee after: Yutong Bus Co.,Ltd. Address before: 450016 Yutong Industrial Zone, eighteen Li River, Henan, Zhengzhou Patentee before: ZHENGZHOU YUTONG BUS Co.,Ltd. |