CN105370644B - Engineering machinery and its distribution system - Google Patents
Engineering machinery and its distribution system Download PDFInfo
- Publication number
- CN105370644B CN105370644B CN201510855642.4A CN201510855642A CN105370644B CN 105370644 B CN105370644 B CN 105370644B CN 201510855642 A CN201510855642 A CN 201510855642A CN 105370644 B CN105370644 B CN 105370644B
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- China
- Prior art keywords
- valve
- oil cylinder
- pendulum
- distribution system
- valve oil
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/78—Control of multiple output members
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of distribution system of engineering machinery, including the first pendulum valve oil cylinder and the second pendulum valve oil cylinder that retracted position is opposite and is oppositely arranged, the piston rod external part of the piston rod external part of the first pendulum valve oil cylinder and the second pendulum valve oil cylinder is articulated with the same one end for swinging changement, the rodless cavity of the rodless cavity of the first pendulum valve oil cylinder and the second pendulum valve oil cylinder is respectively communicated with two actuator ports of reversal valve, the rod chamber of the first pendulum valve oil cylinder is connected by first throttle damper with the fuel tank, the rod chamber of the second pendulum valve oil cylinder is connected by the second throttle attenuator with the fuel tank.Vibration and impact of the distribution system in high speed commutation process are efficiently solved by simple structure, the stability and reliability of system is improved；And service life is extended, reduce research and development and manufacturing cost.Include the engineering machinery of above-mentioned distribution system the invention also discloses a kind of.
Description
Technical field
The present invention relates to engineering machinery field, more particularly to a kind of distribution system of engineering machinery.In addition, the present invention is also
Being related to a kind of includes the engineering machinery of above-mentioned distribution system.
Background technology
Majority has the engineering machinery of pump function, and its distribution system swings reversing machine by putting the extension and contraction control of valve oil cylinder
Structure, which is swung, realizes commutation, refer to Fig. 1, and Fig. 1 is the hydraulic schematic diagram of distribution system in the prior art, including retracted position is opposite
And the first pendulum valve oil cylinder 1 and the second pendulum valve oil cylinder 2 being oppositely arranged, the external part of two pendulum valve oil cylinders is articulated with swing commutation
Same one end of mechanism 3, the middle part for swinging changement 3 is hinged with vehicle body, other end connection S pipes, is changed by swinging the realization of S pipes
To.The rodless cavity of wherein two pendulum valve oil cylinders is respectively communicated with two actuator ports of reversal valve, the rod chamber connection of two pendulum valve oil cylinders
Fuel tank.
Reversal valve makes hydraulic oil enter the rodless cavity of the first pendulum valve oil cylinder 1 by an actuator port during work, promotes piston
Bar stretches out and promotes swing changement 3 to swing aside, and the low pressure oil in rod chamber enters fuel tank, while swinging changement
3 promote the second piston rod for putting valve oil cylinder 2 to retract, and another actuator port stream for making rodless cavity mesolow oil pass through reversal valve
Oil return box.
Reversal valve is commutated during commutation, and hydraulic oil enters the second pendulum valve oil cylinder 2 by an actuator port of reversal valve
Rodless cavity, promotes piston rod to stretch out and promotes swing changement 3 to another side oscillation, the low pressure oil in rod chamber enters oily
Case, promotes the first piston rod for putting valve oil cylinder 1 to retract, and rodless cavity mesolow oil is passed through commutation while swinging changement 3
Another actuator port of valve flows back to fuel tank.
Move back and forth through the above way and realize quick commutation, be typical because commutating period requires often very short
The operating mode of instantaneous high pressure and big flow, the surge pressure caused can be impacted in commutation process along with huge hydraulic shock
For 3-4 times of service pressure, hydraulic system component is often damaged, the stability and reliability of system also can be by shadows
Ring, system temperature rise causes the loosening oil leak of vibration and noise and connector, works as in the actual use process of engineering machinery
In, also occurred being similar to pumping system swing arm fracture, pendulum valve oil cylinder check valve is broken, the failure such as tilt cylinder base cracking, this is all
Had a very large relationship with the reversing impact of hydraulic system.
Therefore, how to provide a kind of distribution system that can reduce reversing impact is that those skilled in the art need solution at present
Technical problem certainly.
The content of the invention
It is an object of the invention to provide a kind of distribution system of engineering machinery, reversing impact can be reduced.The present invention's is another
One purpose be to provide it is a kind of include the engineering machinery of above-mentioned distribution system, improve stability and reliability.
In order to solve the above technical problems, a kind of distribution system of engineering machinery of present invention offer, including retracted position are opposite
And the first pendulum valve oil cylinder and the second pendulum valve oil cylinder being oppositely arranged, the piston rod external part and described the of the first pendulum valve oil cylinder
The piston rod external part of two pendulum valve oil cylinders is articulated with the same one end for swinging changement, the rodless cavity of the first pendulum valve oil cylinder
With the rodless cavity of the described second pendulum valve oil cylinder it is respectively communicated with two actuator ports of reversal valve, the first pendulum valve oil cylinder has bar
Chamber connects fuel tank with the rod chamber of the described second pendulum valve oil cylinder, and the rod chamber of the first pendulum valve oil cylinder passes through first segment flow resistance
Buddhist nun's device is connected with the fuel tank, and the rod chamber of the second pendulum valve oil cylinder is connected by the second throttle attenuator with the fuel tank.
Preferably, the first throttle damper is specially the first adjustable throttling, and second throttle attenuator is specific
For the second adjustable throttling.
Preferably, in addition to first check valve in parallel with the first throttle damper, first check valve allows
Hydraulic oil is flowed to the rod chamber of the first pendulum valve oil cylinder by the fuel tank, in addition in parallel with second throttle attenuator
Second check valve, second check valve allows hydraulic oil to flow to the described second rod chamber for putting valve oil cylinder by the fuel tank.
Preferably, the reversal valve is specially pilot operated directional control valve, and two hydraulic control hydraulic fluid ports of institute's pilot operated directional control valve are respectively communicated with
Two actuator ports of guide's solenoid directional control valve.
Preferably, the pilot operated directional control valve is specially 3-position 4-way pilot operated directional control valve, and guide's solenoid directional control valve is specific
For three-position four-way electromagnetic directional valve.
Preferably, in addition to overflow valve, between the rod chamber and the first throttle damper of the first pendulum valve oil cylinder
Oil communication described in overflow valve oil inlet, it is described second pendulum valve oil cylinder rod chamber and second throttle attenuator between
Oil communication described in overflow valve oil inlet, the oil-out of the overflow valve connects the fuel tank.
The present invention also provides a kind of engineering machinery, including distribution system, and the distribution system is specially above-mentioned any one
Described distribution system.
Preferably, the engineering machinery is specially concrete mixer, Vehicle loaded pump or drags pump.
The distribution system that the present invention is provided, including retracted position is opposite and the first pendulum valve oil cylinder being oppositely arranged and second is put
Valve oil cylinder, make two pendulum valve oil cylinders external part be articulated with swing changement same one end, swing changement middle part with
Vehicle body is hinged, other end connection S pipes, and commutation is realized by swinging S pipes.The rodless cavity and reversal valve of wherein first pendulum valve oil cylinder
One actuator port connection, the rodless cavity of the second pendulum valve oil cylinder is connected with another actuator port of reversal valve, the first pendulum valve oil
The rod chamber of cylinder is connected by first throttle damper with fuel tank, and the rod chamber of the second pendulum valve oil cylinder passes through the second throttle attenuator
Connected with fuel tank.
Move back and forth through the above way and realize quick commutation, rod chamber fluid flows back to fuel tank, shape by throttle attenuator
Into outlet throttling loop, due to the effect of damper, the return oil pressure of rod chamber is improved, is served to actively putting valve oil cylinder
The effect of piston rod retarding braking.By simple structure efficiently solve vibration of the distribution system in high speed commutation process and
Impact, improves the stability and reliability of system；And service life is extended, reduce research and development and manufacturing cost.
The present invention also provide it is a kind of include the engineering machinery of above-mentioned distribution system, because above-mentioned distribution system has above-mentioned skill
Art effect, above-mentioned engineering machinery should also have identical technique effect, no longer be discussed in detail herein.
Brief description of the drawings
Fig. 1 is the hydraulic schematic diagram of distribution system in the prior art；
Fig. 2 is a kind of hydraulic schematic diagram of embodiment of distribution system provided by the present invention.
Embodiment
The core of the present invention is to provide a kind of distribution system of engineering machinery, can reduce reversing impact.The present invention's is another
One core be to provide it is a kind of include the engineering machinery of above-mentioned distribution system, improve stability and reliability.
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Fig. 2 is refer to, Fig. 2 is a kind of hydraulic schematic diagram of embodiment of distribution system provided by the present invention.
In the distribution system that the specific embodiment of the invention is provided, including retracted position it is opposite and be oppositely arranged first
The pendulum valve oil cylinder 2 of valve oil cylinder 1 and second is put, the external part of two pendulum valve oil cylinders is articulated with the same one end for swinging changement 3, pendulum
The middle part of dynamic changement 3 is hinged with vehicle body, other end connection S pipes, and commutation is realized by swinging S pipes.Wherein first pendulum valve oil
The rodless cavity of cylinder 1 is connected with reversal valve actuator port, the rodless cavity of the second pendulum valve oil cylinder 2 and another work of reversal valve
Make hydraulic fluid port connection, the rod chamber of the first pendulum valve oil cylinder 1 is connected by first throttle damper 4 with fuel tank, the second pendulum valve oil cylinder 2
Rod chamber is connected by the second throttle attenuator 5 with fuel tank.Multigroup pendulum valve oil cylinder can be set to be commutated simultaneously.
Specifically, the throttle attenuator 5 of first throttle damper 4 and second is adjustable throttling, realizes outlet loop
Throttling it is adjustable, also can use other kinds of throttle attenuator, such as use definite value choke valve, protection scope of the present invention it
It is interior.
Reversal valve makes hydraulic oil enter the rodless cavity of the first pendulum valve oil cylinder 1 by an actuator port during work, promotes piston
Bar stretches out and promotes swing changement 3 to swing aside, and the low pressure oil in the rod chamber of the first pendulum valve oil cylinder 1 passes through first segment
Damper 4 enters fuel tank, promotes the second piston rod for putting valve oil cylinder 2 to retract while swinging changement 3, the second pendulum valve oil cylinder
Another working oil that 2 rod chamber passes through reversal valve from the low pressure oil in fuel tank oil suction, and the rodless cavity of the second pendulum valve oil cylinder 2
Mouth flows back to fuel tank.
Reversal valve commutates during commutation, hydraulic oil is entered the rodless cavity of the second pendulum valve oil cylinder 2 by an actuator port, promotes
Piston rod stretches out and promotes swing changement 3 to another side oscillation, and the second low pressure oil put in the rod chamber of valve oil cylinder 2 passes through
Second throttle attenuator 5 enters fuel tank, promotes the first piston rod for putting valve oil cylinder 1 to retract while swinging changement 3, the first pendulum
The rod chamber of valve oil cylinder 1 from fuel tank oil suction, and low pressure oil in the rodless cavity of the first pendulum valve oil cylinder 1 by reversal valve another
Actuator port flows back to fuel tank.
Move back and forth through the above way and realize quick commutation, rod chamber fluid flows back to fuel tank, shape by throttle attenuator
Into outlet throttling loop, due to the effect of damper, the return oil pressure of rod chamber is improved, is served to actively putting valve oil cylinder
The effect of piston rod retarding braking.By simple structure efficiently solve vibration of the distribution system in high speed commutation process and
Impact, improves the stability and reliability of system；And service life is extended, reduce research and development and manufacturing cost.
In the distribution system that the specific embodiment of the invention is provided, in addition in parallel with first throttle damper 4 the
One check valve 6, and the first check valve 6 allows hydraulic oil to flow to the rod chamber of the first pendulum valve oil cylinder 1 by fuel tank, and prevent hydraulic oil
Fuel tank, in addition to second check valve 7 in parallel with the second throttle attenuator 5 are flowed to by rod chamber, and the second check valve 7 allows liquid
Force feed is flowed to the rod chamber of the second pendulum valve oil cylinder 2 by fuel tank, and prevents hydraulic oil from flowing to fuel tank by rod chamber.It is unidirectional by setting
Valve, fuel tank can only be entered by throttle attenuator by making actively to put the hydraulic oil in the rod chamber of valve oil cylinder, and by movable pendulum valve oil cylinder
Rod chamber when needing oil suction, hydraulic oil only enters rod chamber by check valve without throttle attenuator by fuel tank.Both ensured
Effectively buffering, ensures fast absorbing oil, it is seen then that when being not provided with check valve again, by throttle attenuator oil suction also in the guarantor of the present invention
Within the scope of shield.
In the distribution system that the specific embodiment of the invention is provided, reversal valve can be pilot operated directional control valve, and set
There is guide's solenoid directional control valve, two actuator port is respectively communicated with two hydraulic control hydraulic fluid ports of pilot operated directional control valve, and specifically, hydraulic control is changed
It is 3-position 4-way pilot operated directional control valve to valve, guide's solenoid directional control valve is three-position four-way electromagnetic directional valve.There is provided simultaneously by accumulator
Power, and accumulator connects with plate variable plunger pump.Plate variable plunger pump is accumulator topping up during work, works as pendulum
When valve oil cylinder needs commutation, the electromagnet of guide's solenoid directional control valve first obtains electric, the commutation of guide's solenoid directional control valve, controls hydraulic oil
Into the control port of pilot operated directional control valve, the valve element movement of pilot operated directional control valve is promoted, it is commutated, accumulator and a pendulum valve oil
Cylinder is turned on, and fluid promotes piston movement, promotes swing changement to realize commutation.
In the distribution system that above-mentioned embodiment is provided, overflow valve 8 can also be set, the first pendulum valve oil cylinder 1
The oil inlet of oil communication overflow valve 8 between rod chamber and first throttle damper 4, the rod chamber of the second pendulum valve oil cylinder 2 with
The oil inlet of oil communication overflow valve 8 between second throttle attenuator 5, the oil-out connection fuel tank of overflow valve 8.By setting
Overflow valve 8 ensures that oil circuit is substantially at constant pressure buffering operating mode, protects Hydraulic Elements.
In the distribution system that the specific embodiment of the invention is provided, check valve and overflow valve 8 can be using two-way insertings
The integrated arrangement of valve, valve core structure is simple, is active in one's movements, good airproof performance, can also use other arrangements, the guarantor in the present invention
Within the scope of shield.
Except above-mentioned distribution system, embodiment of the invention, which is also provided, a kind of includes the engineering of above-mentioned distribution system
Machinery, the structure of other each several parts of the engineering machinery refer to prior art, repeat no more herein.
Specifically, above-mentioned engineering machinery can be concrete mixer, Vehicle loaded pump or drag pump.
Engineering machinery provided by the present invention and its distribution system are described in detail above.Tool used herein
Body example is set forth to the principle and embodiment of the present invention, and the explanation of above example is only intended to help and understands this hair
Bright method and its core concept.It should be pointed out that for those skilled in the art, not departing from the present invention
On the premise of principle, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into right of the present invention
It is required that protection domain in.
Claims (7)
1. a kind of distribution system of engineering machinery, including retracted position is opposite and the first pendulum valve oil cylinder (1) for being oppositely arranged and the
The piston rod of two pendulum valve oil cylinders (2), the piston rod external part of the first pendulum valve oil cylinder (1) and the second pendulum valve oil cylinder (2)
External part is articulated with the same one end for swinging changement (3), the rodless cavity of the first pendulum valve oil cylinder (1) and second pendulum
The rodless cavity of valve oil cylinder (2) is respectively communicated with two actuator ports of reversal valve, the rod chamber of the first pendulum valve oil cylinder (1) and institute
The rod chamber for stating the second pendulum valve oil cylinder (2) connects fuel tank, it is characterised in that the rod chamber of the first pendulum valve oil cylinder (1) leads to
Cross first throttle damper (4) to connect with the fuel tank, the rod chamber of the second pendulum valve oil cylinder (2) passes through the second throttle
Device (5) is connected with the fuel tank；
Also include overflow valve (8), between the rod chamber and the first throttle damper (4) of the first pendulum valve oil cylinder (1)
The oil inlet of overflow valve described in oil communication (8), the rod chamber and second throttle attenuator of the second pendulum valve oil cylinder (2)
(5) oil inlet of overflow valve (8) described in the oil communication between, the oil-out of the overflow valve (8) connects the fuel tank.
2. distribution system according to claim 1, it is characterised in that the first throttle damper (4) is specially first
Adjustable throttling, second throttle attenuator (5) is specially the second adjustable throttling.
3. distribution system according to claim 1, it is characterised in that also including with the first throttle damper (4) simultaneously
The first check valve (6) of connection, first check valve (6) allows hydraulic oil to flow to the first pendulum valve oil cylinder by the fuel tank
(1) rod chamber, in addition to second check valve (7) in parallel with second throttle attenuator (5), second check valve
(7) hydraulic oil is allowed to flow to the rod chamber of the second pendulum valve oil cylinder (2) by the fuel tank.
4. distribution system according to claim 1, it is characterised in that the reversal valve is specially pilot operated directional control valve, institute's liquid
Two hydraulic control hydraulic fluid ports of control reversal valve are respectively communicated with two actuator ports of guide's solenoid directional control valve.
5. distribution system according to claim 4, it is characterised in that the pilot operated directional control valve is specially 3-position 4-way hydraulic control
Reversal valve, guide's solenoid directional control valve is specially three-position four-way electromagnetic directional valve.
6. a kind of engineering machinery, including distribution system, it is characterised in that the distribution system is specially that claim 1 to 5 is any
Distribution system described in one.
7. engineering machinery according to claim 6, it is characterised in that the engineering machinery is specially concrete mixer, car
Carry pump or drag pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510855642.4A CN105370644B (en) | 2015-11-30 | 2015-11-30 | Engineering machinery and its distribution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510855642.4A CN105370644B (en) | 2015-11-30 | 2015-11-30 | Engineering machinery and its distribution system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105370644A CN105370644A (en) | 2016-03-02 |
| CN105370644B true CN105370644B (en) | 2017-11-03 |
Family
ID=55373152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510855642.4A Active CN105370644B (en) | 2015-11-30 | 2015-11-30 | Engineering machinery and its distribution system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105370644B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152397B (en) * | 2017-05-19 | 2019-06-11 | 北汽福田汽车股份有限公司 | Put valve oil cylinder, hydraulic system of pump and pumping equipment with it |
| CN114044440B (en) * | 2021-11-18 | 2024-04-05 | 中铁工程装备集团有限公司 | Direct type duct piece lifting system and control method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562691A (en) * | 2010-12-08 | 2012-07-11 | 西安众智惠泽光电科技有限公司 | Hydraulic overflow throttling combined buffer loop for mechanical arm |
| CN203248453U (en) * | 2013-04-24 | 2013-10-23 | 浙江工商职业技术学院 | Stroke deceleration loop device |
| CN203394895U (en) * | 2013-07-30 | 2014-01-15 | 三一汽车制造有限公司 | Buffering hydraulic loop and concrete pumping device |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0041686B1 (en) * | 1980-06-06 | 1986-04-09 | Kawasaki Jukogyo Kabushiki Kaisha | Hydraulic circuit arrangement |
| US6941687B2 (en) * | 2001-09-25 | 2005-09-13 | Cnh America Llc | Electronic control for swing damping |
| US6666125B2 (en) * | 2002-03-14 | 2003-12-23 | Sauer-Danfoss Inc. | Swing cylinder oscillation control circuit and valve for oscillating booms |
| CN204458585U (en) * | 2014-12-11 | 2015-07-08 | 西安众智惠泽光电科技有限公司 | Throttling buffering hydraulic control system |
| CN105080978B (en) * | 2015-09-14 | 2017-06-16 | 太原科技大学 | The control method of rolling mill hydraulic system |
-
2015
- 2015-11-30 CN CN201510855642.4A patent/CN105370644B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562691A (en) * | 2010-12-08 | 2012-07-11 | 西安众智惠泽光电科技有限公司 | Hydraulic overflow throttling combined buffer loop for mechanical arm |
| CN203248453U (en) * | 2013-04-24 | 2013-10-23 | 浙江工商职业技术学院 | Stroke deceleration loop device |
| CN203394895U (en) * | 2013-07-30 | 2014-01-15 | 三一汽车制造有限公司 | Buffering hydraulic loop and concrete pumping device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105370644A (en) | 2016-03-02 |
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Effective date of registration: 20200927 Address after: No.202 Xuanfu street, Xuanhua District, Zhangjiakou, Hebei Province Patentee after: Hebei Leisa Heavy Construction Machinery Co., Ltd Address before: 102206 Changping District City, Shahe, Sha Yang Road, Beijing Patentee before: BEIQI FOTON MOTOR Co.,Ltd. |