CN207961392U - Damper and engineering truck - Google Patents
Damper and engineering truck Download PDFInfo
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- CN207961392U CN207961392U CN201721551280.0U CN201721551280U CN207961392U CN 207961392 U CN207961392 U CN 207961392U CN 201721551280 U CN201721551280 U CN 201721551280U CN 207961392 U CN207961392 U CN 207961392U
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- spring portion
- damping
- vibration attenuation
- damper
- damping vibration
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Abstract
The utility model discloses a kind of damper and engineering trucks.Damper includes shell, mandrel and vibration-proof structure, shell has open end and blind end, vibration-proof structure includes rubber spring portion, damping vibration attenuation portion and air spring portion, stem seal is connected to the middle part in rubber spring portion and the sealed connection of the side wall of rubber spring portion and shell makes to form closed housing between rubber spring portion and blind end with closing open end, and damping vibration attenuation portion and air spring portion are set in closed housing.Air spring portion, rubber spring portion and damping vibration attenuation portion are organically combined by the damper of the utility model, different damping elements is set to play respective advantage during the work time, to make the rigidity of damper change with the variation of operating mode and then the demand of adaptation engineering truck complex working condition during doing one's assignment.
Description
Technical field
The utility model is related to technical field of engineering machinery, more particularly to a kind of damper and engineering truck.
Background technology
The engineering trucks such as road roller, loading machine, land leveller, excavator are widely used in building, road, mine, harbour etc. and apply
Work scene, and the pavement behavior of above-mentioned construction site and working environment are relatively more severe, therefore engineering truck is during the work time
Often due to being generated low-frequency vibration and shaking by huge temporary impact.The vibration isolation of driver's cabin in the prior art is general
Using damper, the effect of damper is to obstruct and weaken transmission of the vehicle frame to cab vibration energy, accelerates vehicle frame and drives
The comfort for the ride comfort and raising operating personnel that the decaying of vibrational energy travels so as to improve vehicle between room.
As shown in Figure 1, damper in the prior art includes shell 1a and support inner core 2a.In the circumferential direction for supporting inner core 2a
It is provided with rubber 7a, interior panel 4a is set in rubber 7a.Dampened disk 3a is installed on the bottom end of support inner core 2a.Support inner core 2a
And the opening and oil pocket of the formation for accommodating silicone oil 6a between the inner wall of shell 1a, silicone oil 6a of rubber 7a closing shells 1a are used
To support above-mentioned support inner core 2a and rubber 7a.And sealing ring 5a is provided between rubber 7a and shell 1a.Above-mentioned damper
Rigidity it is unchanged, it is difficult to adapt to the demand of engineering truck complex working condition in operation process, it is difficult to promote work to the maximum extent
The comfort of journey vehicle.And above-mentioned damper cannot be effectively isolated low-frequency vibration, cannot fundamentally solve engineering truck
Problem is shaken to the low frequency that driver's cabin generates in the course of work.
Utility model content
The purpose of this utility model is to provide a kind of damper and engineering trucks, to adapt to engineering truck in operation process
The demand of middle complex working condition.
The utility model first aspect provides a kind of damper, including shell, mandrel and vibration-proof structure, and shell, which has, to be opened
Mouth end and blind end, vibration-proof structure include that rubber spring portion, damping vibration attenuation portion and air spring portion, stem seal are connected to rubber
The middle part of the spring portion and sealed connection of the side wall of rubber spring portion and shell makes rubber spring portion and closing with closing open end
Closed housing is formed between end, damping vibration attenuation portion and air spring portion are set in closed housing.
Further, in the axial direction of mandrel, damping vibration attenuation portion is set between rubber spring portion and air spring portion.
Further, air spring portion includes the air chamber that flexible sheet and flexible sheet are enclosed with blind end.
Further, the pressure adjustable of air chamber saves land setting.
Further, damper further includes being set on the inner wall of blind end and to the of the protrusion setting of flexible sheet side
One position limiting structure, flexible sheet are abutted with the first position limiting structure to limit the limit position that flexible sheet is moved to blind end side
It sets.
Further, closed housing includes the damping vibration attenuation chamber between air spring portion and rubber spring portion, wherein
Damping vibration attenuation portion includes the dampened disk and damping fluid for being set to damping vibration attenuation intracavitary, and through-hole is provided on dampened disk；And/or
Damping vibration attenuation portion includes the compressed spring for being set to damping vibration attenuation intracavitary.
Further, damping vibration attenuation portion further includes the isolation structure for the close rubber spring portion side for being set to dampened disk,
Damping vibration attenuation chamber is divided into the first damping vibration attenuation chamber and the second damping vibration attenuation chamber, the setting of the second damping vibration attenuation intracavitary by isolation structure
There is the communication port being provided on damping liquid and isolation structure for being connected to the first damping vibration attenuation chamber and the second damping vibration attenuation chamber.
Further, being provided on the surface of the side of the second damping vibration attenuation chamber towards the second damping for isolation structure subtracts
Shake chamber side protrusion the second position limiting structure, the second position limiting structure be used for limit dampened disk to close to open end side limit position
It sets.
Further, convex block is elastic projection.
The utility model second aspect provides a kind of engineering truck, including vehicle frame, driver's cabin and the utility model first party
The damper that any one of face provides, shell are fixedly installed on vehicle frame, and mandrel is fixedly installed relative to driver's cabin.
It includes shell, mandrel and vibration-proof structure, shell to provide damper and engineering truck, damper based on the utility model
It includes rubber spring portion, damping vibration attenuation portion and air spring portion that body, which has open end and blind end, vibration-proof structure, and stem seal connects
It is connected to the middle part in rubber spring portion and the sealed connection of the side wall of rubber spring portion and shell makes rubber spring with closing open end
Closed housing is formed between portion and blind end, damping vibration attenuation portion and air spring portion are set in closed housing.The utility model
Damper air spring portion, rubber spring portion and damping vibration attenuation portion are organically combined, make different damping elements
Respective advantage is played during the work time, to make the rigidity of damper change with the variation of operating mode and then adapt to engineering
The demand of vehicle complex working condition during doing one's assignment.
By referring to the drawings to the detailed description of the exemplary embodiment of the utility model, the utility model it is other
Feature and its advantage will become apparent.
Description of the drawings
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model
It limits.In the accompanying drawings：
Fig. 1 is the structural schematic diagram of the damper of the prior art；
Fig. 2 is the dimensional structure diagram of the damper of the utility model embodiment；
Fig. 3 is the cross section structure schematic diagram of damper shown in Fig. 2；
Fig. 4 is the overlooking structure diagram of damper shown in Fig. 2；
Fig. 5 is the dimensional structure diagram of the interior panel in Fig. 2.
Each reference numeral respectively represents：
1a- shells；2a- supports inner core；3a- dampened disks；Panel in 4a-；5a- sealing rings；6a- silicone oil；7a- rubber；1-
Shell；2- mandrels；3- dampened disks；Panel in 4-；41- planar portions；42- cylindrical parts；5- sealing rings；6- damping liquids；7- rubber
Spring portion；8- isolation structures；9- compressed springs；10- flexible sheets；The second position limiting structures of 11-；12- spring seats；13- first
Position limiting structure；14- intake valves；15- pressure limiting valves.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to this practicality
Novel and its application or any restrictions used.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
There is the every other embodiment obtained under the premise of making creative work, shall fall within the protection scope of the present invention.
Unless specifically stated otherwise, positioned opposite, the digital table of the component and step that otherwise illustrate in these embodiments
Up to the unlimited the scope of the utility model processed of formula and numerical value.Simultaneously, it should be appreciated that for ease of description, attached shown in the drawings each
The size of a part is not to be drawn according to actual proportionate relationship.For skill known to person of ordinary skill in the relevant
Art, method and apparatus may be not discussed in detail, but in the appropriate case, and the technology, method and apparatus should be considered as awarding
Weigh part of specification.In shown here and discussion all examples, any occurrence should be construed as merely example
Property, not as limitation.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that：It is similar
Label and letter similar terms are indicated in following attached drawing, therefore, once be defined in a certain Xiang Yi attached drawing, then with
It need not be further discussed in attached drawing afterwards.
For ease of description, herein can with use space relative terms, as " ... on ", " in ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be understood that spatially relative term is intended to comprising the orientation in addition to device described in figure
Except different direction in use or operation.For example, if the device in attached drawing is squeezed, it is described as " in other devices
It will be positioned as " under other devices or construction after part or construction top " or the device of " on other devices or construction "
Side " or " under other devices or construction ".Thus, exemplary term " ... top " may include " ... top " and
" in ... lower section " two kinds of orientation.The device can also other different modes positioning (be rotated by 90 ° or be in other orientation), and
And respective explanations are made to the opposite description in space used herein above.
The damper of the utility model embodiment includes shell, mandrel and vibration-proof structure.Shell has open end and envelope
Closed end.Vibration-proof structure includes rubber spring portion, damping vibration attenuation portion and air spring portion, and stem seal is connected to rubber spring portion
Middle part and the side wall of rubber spring portion and shell, which are tightly connected, makes shape between rubber spring portion and blind end with closing open end
At closed housing, damping vibration attenuation portion and air spring portion are set in closed housing.The damper of the utility model embodiment will
Air spring portion, rubber spring portion and damping vibration attenuation portion are organically combined, and make different damping elements in the course of work
It is middle to play respective advantage, to make the rigidity of damper change with the variation of operating mode and then adapt to engineering truck affected
The demand of complex working condition during industry.
The structure of the damper of the utility model specific embodiment is described in detail below according to Fig. 2 to Fig. 5.
As depicted in figs. 1 and 2, the damper of the present embodiment includes shell 1, mandrel 2 and vibration-proof structure.Shell 1 has
Open end and blind end.Vibration-proof structure includes rubber spring portion 7, damping vibration attenuation portion and air spring portion.Mandrel 2 is sealedly attached to
The middle part and rubber spring portion 7 in rubber spring portion 7 and the side wall sealed connection of shell 1 make rubber spring portion with closing open end
Closed housing is formed between 7 and blind end, damping vibration attenuation portion and air spring portion are set in closed housing.
The top of the shell 1 of the present embodiment is open end, and lower part is blind end, and shell is columnar structured.Rubber bullet
Spring portion 7 is with the columnar structured of central through hole.Mandrel 2 is sealedly attached in the central through hole in rubber spring portion 7.And rubber
The peripheral surface of spring portion 7 is tightly connected with shell 1.
There is the cavity around mandrel 2, cavity to form a part for closed housing for the bottom surface of rubber spring 7.
In order to preferably make rubber spring portion 7 be tightly connected with shell 1, the damper of the present embodiment further includes interior panel 4.
The stereochemical structure of interior panel 4 is as shown in figure 5, interior panel 4 includes planar portions 41 and cylindrical part 42.Cylindrical part 42 is located at rubber spring
The inside in portion 7 is simultaneously coaxially disposed with mandrel 2, and planar portions 41 extend outward rubber from cylindrical part 42 and connect with shell 1.Such as figure
Shown in 2, shell 1 also just has from the outwardly extending end face in open end, which is fixedly connected with the planar portions 41 of interior panel 4.
Preferably, the shell 1 of the present embodiment further includes the bending part positioned at both sides, which has groove, interior panel 4
Planar portions 41 be inserted in groove to be fixedly installed relative to shell.Specifically, the planar portions 41 of interior panel 4 and shell 1
End face is attached by circumferentially disposed multiple connectors.
Specifically in the present embodiment, in the axial direction of mandrel 2, damping vibration attenuation portion is set to rubber spring portion 7 and air bullet
Between spring portion.
It is enclosed with blind end as shown in figure 3, the air spring portion of the present embodiment includes flexible sheet 10 and flexible sheet 10
Close the air chamber Q3 formed.
Preferably, in order to adjust the present embodiment air spring portion rigidity, the pressure of the air chamber Q3 of the present embodiment can
Adjustably it is arranged.As shown in figure 3, being provided with intake valve 14 and pressure limiting valve 15 on blind end.Pressure limiting valve 15 is for limiting air chamber
Gas pressure in Q3.In actual use, the pressure of air chamber Q3 can be adjusted preferably to meet as needed
The rigidity requirement of damper.The rigidity in the air spring portion of the present embodiment can be according to the needs of carrying by changing air chamber Q3
The pressure of middle gas automatically adjusts to adapt to the demand of multi-state.
In order to limit the extreme position of flexible sheet 10, as shown in figure 3, the damper of the present embodiment further includes being set to envelope
On the inner wall of closed end and to the first position limiting structure 13 of 10 side of flexible sheet protrusion setting, the limit of flexible sheet 10 and first is tied
Structure 13 is abutted to limit the extreme position that flexible sheet 10 is moved to blind end side.
The closed housing of the present embodiment includes the damping vibration attenuation chamber between air spring portion and rubber spring portion 7, resistance
Buddhist nun's vibration damping portion includes the dampened disk 3 and damping liquid 6 for being set to damping vibration attenuation intracavitary, and through-hole is provided on dampened disk 3.And
Damping vibration attenuation portion further includes the compressed spring 9 for being set to damping vibration attenuation intracavitary.
The dampened disk 3 of the present embodiment is fixedly connected on the lower end of mandrel 2.In order to improve the effectiveness in vibration suppression in damping vibration attenuation portion,
As shown in figure 3, the damping vibration attenuation portion of the present embodiment further includes the isolation for close 7 side of rubber spring portion for being set to dampened disk 3
Structure 8.Damping vibration attenuation chamber is divided into the first damping vibration attenuation chamber Q1 and the second damping vibration attenuation chamber Q2, the second damping by isolation structure 8
It is provided on damping liquid 6 and isolation structure 8 and is provided with for being connected to the resistances of the first damping vibration attenuation chamber Q1 and second in vibration damping chamber Q2
The communication port of Buddhist nun's vibration damping chamber Q2.The liquid level of damping liquid 6 is higher than dampened disk 3.When shell 1 is by upward impact force, damping
Liquid 6 moves up, and the communication port on isolation structure 8 moves up for damping liquid 6 and provides larger space, and damps
Liquid can further consume energy when passing through communication port, play the role of axial limiting and buffering.
And gassy in the first damping vibration attenuation chamber Q1 of the present embodiment should during damper is impacted
Portion gas is accelerated the decaying of vibrational energy by reciprocating compression.To sum up, the damper of the present embodiment passes through damping liquid
The reciprocating compression of flowing and gas back and forth increases the decaying that damping accelerates vibrational energy, occurs to solve driver's cabin
Shaking problem.
Isolation structure 8 is provided on the surface of the side of the second damping vibration attenuation chamber Q2 towards the second damping vibration attenuation chamber Q2
Second position limiting structure 11 of side protrusion, the second position limiting structure 11 are used to limit dampened disk 3 to the limit close to open end side
Position.
Preferably, the convex block of the present embodiment is elastic projection.The elastic projection should play the role of buffering, but rigidity
Again cannot be too small, such as can be rubber convex block.
As shown in figure 3, the isolation structure 8 of the present embodiment includes separator.There is separator centre bore, mandrel 2 to be arranged in
In centre bore.Gap between the inner wall and the outer wall of mandrel 2 of centre bore forms above-mentioned communication port.And dampened disk 3 is disk
Formula structure, multiple damping holes are distributed uniformly and circumferentially dampened disk.Dampened disk 3 is interference fitted with mandrel.
The top and bottom surface of separator 8 is both provided with groove.Sealing ring 5 is provided in groove.And separator 8 and shell 1
And interior panel 4 is fixedly installed.
The damping vibration attenuation portion of the present embodiment further includes the compressed spring 9 being set between dampened disk 3 and air spring portion.Pressure
One end of contracting spring 9 is fixedly connected with dampened disk, and the other end of compressed spring 9 and the spring seat for being set to flexible sheet 10 are solid
Fixed connection.Compressed spring is arranged in the damper of the present embodiment in damping liquid, to make the rigidity of damper and damp simultaneously
Increase, makes damper that can also improve vibration isolation rigidity on the basis of being effectively isolated low-frequency vibration.
When the damper of the present embodiment is used for engineering truck, shell 1 is fixedly installed on vehicle frame, and mandrel 2 is relative to driving
Room is fixedly installed.
Course of work when being applied to engineering truck to the damper of the present embodiment below is described in detail.
As shown in Fig. 2, the shell 1 of the damper of the present embodiment is fixed at vehicle frame by four holes being axially arranged
On.Mandrel 2 is connect with driver's cabin, and damper will be preloaded effect by one and generate precompressed compression deformation at this time.
When vehicle frame impact vibrated, causes mandrel 2 to move up and down first, make 7 tension and compression deformation of rubber spring portion, at this time
Gas volume in first damping vibration attenuation chamber Q1 increases or reduces.And the damping liquid 6 in the second damping vibration attenuation chamber Q2 be can not
Compression, the rigidity in rubber spring portion 7 increases at this time, while driving 9 compressive deformation of compressed spring, the rigidity of compressed spring 9
Increase therewith, and then flexible sheet 10 is caused to deform, the gap between flexible sheet 10 and the first position limiting structure 13 becomes smaller, gas
The volume of chamber Q3 reduces, and then pressure becomes larger, and the rigidity in air spring portion increases, and the bearing capacity of damper also accordingly increases at this time
Add.In summary, air spring portion is in effective stroke, that is to say, that abuts it with the second position limiting structure in flexible sheet 10
Before, rubber spring portion 7 is shear-deformable, 9 compressive deformation of compressed spring and common provide of 10 compressed air of flexible sheet deformation subtract
It shakes rigidity needed for device, to improve the rigidity of damper.The up and down motion of mandrel 2 makes damping liquid 6 pass through the resistance on dampened disk
Communication port on Buddhist nun hole and separator flow back and forth and the first damping vibration attenuation chamber Q1 and air chamber Q2 in air by past
Compound compression increases the damping of damper jointly, makes vibration that smoothly flexible transmission occur, and plays isolation low-frequency vibration, rapid decaying
The effect of vibrational energy.In addition, since temperature has a significant impact to the damping of damping liquid, rubber etc., when temperature is higher,
The damping of damping liquid is deteriorated and rubber softening Stiffness.Since the vibration amplitude of the damper of the present embodiment is smaller,
Vibration decaying is very fast, therefore compared with damper in the prior art, the temperature ramp-up rate of the damper of the present embodiment is smaller,
The performance of damper is more stable.In summary, the rigidity of the damper of the present embodiment can change with the variation of operating mode, from
And the demand of engineering truck complex working condition in traveling especially operation process is adapted to, and then improve the comfort of engineering truck.
After so that flexible sheet 10 is touched the first position limiting structure when the load and larger percussion that damper is subject to,
Air spring portion no longer works at this time, and the rigidity of damper is by the shear action in rubber spring portion 7 and the pressure of compressed spring 9
Compression deformation provides.Damping is interacted by dampened disk, separator and damping liquid and is provided, so as to big load of being isolated and decay
And the effect of instantaneous large impact.In addition, when encountering larger dynamic loading and shock loading, damper mandrel 2 will produce larger
Axial displacement, the bump contact on dampened disk and separator will play at this point, since the rigidity of separator and convex block is larger
The effect of axial limiting and buffering is axially generating larger stretching displacement to limit damper, is reducing low frequency and shake.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model rather than limits it
System；Although the utility model is described in detail with reference to preferred embodiment, those of ordinary skill in the art should
Understand：It can still modify to specific embodiment of the present utility model or some technical characteristics are equally replaced
It changes；Without departing from the spirit of technical solutions of the utility model, should all cover in the claimed technical solution of the utility model
In range.
Claims (10)
1. a kind of damper, which is characterized in that including shell (1), mandrel (2) and vibration-proof structure, the shell (1), which has, opens
Mouth end and blind end, the vibration-proof structure include rubber spring portion (7), damping vibration attenuation portion and air spring portion, the mandrel (2)
It is sealedly attached to the middle part of the rubber spring portion (7) and the rubber spring portion and the side wall of the shell (1) is tightly connected
Make to form closed housing between the rubber spring portion (7) and the blind end to close the open end, the damping subtracts
It shakes portion and the air spring portion is set in the closed housing.
2. damper according to claim 1, which is characterized in that in the axial direction of the mandrel, the damping vibration attenuation portion
It is set between the rubber spring portion and the air spring portion.
3. damper according to claim 2, which is characterized in that the air spring portion include flexible sheet (10) and
The air chamber (Q3) that the flexible sheet (10) is enclosed with the blind end.
4. damper according to claim 3, which is characterized in that the pressure adjustable of the air chamber (Q3) saves land setting.
5. damper according to claim 3, which is characterized in that the damper further includes being set to the blind end
On inner wall and to the first position limiting structure (13) of flexible sheet side protrusion setting, the flexible sheet (10) and described the
One position limiting structure (13) is abutted to limit the extreme position that the flexible sheet (10) is moved to the blind end side.
6. damper according to claim 2, which is characterized in that the closed housing includes being located at the air spring portion
With the damping vibration attenuation chamber between the rubber spring portion, wherein the damping vibration attenuation portion includes being set to the damping vibration attenuation chamber
Interior dampened disk (3) and damping fluid are provided with through-hole on the dampened disk (3)；And/or the damping vibration attenuation portion includes setting
It is placed in the compressed spring (9) of the damping vibration attenuation intracavitary.
7. damper according to claim 6, which is characterized in that the damping vibration attenuation portion further includes being set to the damping
The isolation structure (8) close to rubber spring portion (7) side of disk (3), the isolation structure (8) is by the damping vibration attenuation chamber
It is divided into the first damping vibration attenuation chamber (Q1) and the second damping vibration attenuation chamber (Q2), is arranged in the second damping vibration attenuation chamber (Q2)
It states and is provided on damping liquid and the isolation structure (8) for being connected to the first damping vibration attenuation chamber (Q1) and second resistance
The communication port of Buddhist nun's vibration damping chamber (Q2).
8. damper according to claim 7, which is characterized in that the isolation structure (8) damps close to described second
The second position limiting structure protruded towards the second damping vibration attenuation chamber (Q2) side is provided on the surface of the side of vibration damping chamber (Q2)
(11), second position limiting structure (11) is used to limit the dampened disk (3) to the extreme position close to the open end side.
9. damper according to claim 8, which is characterized in that second position limiting structure (11) is convex block, described convex
Block is elastic projection.
10. a kind of engineering truck, which is characterized in that including vehicle frame, driver's cabin and as claimed in any one of claims 1-9 wherein
Damper, the shell are fixedly installed on the vehicle frame, and the mandrel is fixedly installed relative to the driver's cabin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721551280.0U CN207961392U (en) | 2017-11-20 | 2017-11-20 | Damper and engineering truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721551280.0U CN207961392U (en) | 2017-11-20 | 2017-11-20 | Damper and engineering truck |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207961392U true CN207961392U (en) | 2018-10-12 |
Family
ID=63724553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721551280.0U Active CN207961392U (en) | 2017-11-20 | 2017-11-20 | Damper and engineering truck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207961392U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740840A (en) * | 2017-11-20 | 2018-02-27 | 徐工集团工程机械有限公司 | Shock absorber and engineering truck |
| CN110735880A (en) * | 2019-09-06 | 2020-01-31 | 株洲时代新材料科技股份有限公司 | Sealing method of liquid composite spring |
-
2017
- 2017-11-20 CN CN201721551280.0U patent/CN207961392U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107740840A (en) * | 2017-11-20 | 2018-02-27 | 徐工集团工程机械有限公司 | Shock absorber and engineering truck |
| CN107740840B (en) * | 2017-11-20 | 2024-05-28 | 江苏徐工国重实验室科技有限公司 | Shock absorber and engineering vehicle |
| CN110735880A (en) * | 2019-09-06 | 2020-01-31 | 株洲时代新材料科技股份有限公司 | Sealing method of liquid composite spring |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220720 Address after: 221004 26 Tuo Lan Shan Road, Xuzhou economic and Technological Development Zone, Jiangsu Patentee after: Jiangsu XCMG Guozhong Laboratory Technology Co.,Ltd. Address before: 221004 26 Tuo Lan Shan Road, Xuzhou economic and Technological Development Zone, Jiangsu Patentee before: XCMG CONSTRUCTION MACHINERY Co.,Ltd. |
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| TR01 | Transfer of patent right |