CN109404360B - Valve block and hydraulic four-wheel-drive power distribution mechanism based on same - Google Patents
Valve block and hydraulic four-wheel-drive power distribution mechanism based on same Download PDFInfo
- Publication number
- CN109404360B CN109404360B CN201811494963.6A CN201811494963A CN109404360B CN 109404360 B CN109404360 B CN 109404360B CN 201811494963 A CN201811494963 A CN 201811494963A CN 109404360 B CN109404360 B CN 109404360B
- Authority
- CN
- China
- Prior art keywords
- valve
- oil
- valve block
- hydraulic
- sequence
- Prior art date
- 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.)
- Active
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 13
- 239000003921 oil Substances 0.000 claims abstract description 175
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 14
- 239000002243 precursor Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- 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
- 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
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/001—Servomotor systems with fluidic control
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a valve block and a hydraulic four-wheel drive power distribution mechanism based on the valve block. The valve block is provided with an oil inlet, a first oil outlet and a second oil outlet; the valve block comprises a first sequence valve, a second sequence valve and a logic valve, wherein oil inlets of the first sequence valve and the second sequence valve are used as oil inlets of the valve block; the first sequence valve control oil port is connected with a first interface of a second oil way of the logic valve, the second interface of the second oil way is connected with an oil outlet of the second sequence valve, and the oil outlet of the second sequence valve is a second oil outlet of the valve block; the second sequential valve control oil port is connected with a first interface of a first oil way of the logic valve, the second interface of the first oil way is connected with an oil outlet of the first sequential valve, and the oil outlet of the first sequential valve is a first oil outlet of the valve block. The valve block has a simple structure, can effectively limit the loss of a large amount of hydraulic oil through the hydraulic motor, and keeps the working pressure of the other hydraulic motor.
Description
Technical Field
The invention relates to the field of hydraulic control, in particular to a valve block and a hydraulic four-wheel-drive power distribution mechanism based on the valve block.
Background
At present, in the operation process of the agricultural machine, the situation of skidding of the driving wheels is frequently encountered, and particularly in the desert area in Xinjiang, the four-wheel driving function of the agricultural machine is particularly important. The front-designed four-wheel drive is that a hydraulic pump outputs hydraulic energy to two hydraulic motors responsible for front-wheel drive and rear-wheel drive to finish the driving of the vehicle. However, when one wheel slips, the hydraulic motor driving the slipping wheel rotates rapidly, and as the pressure in the hydraulic pipeline is the same, a large amount of hydraulic energy disappears from the rotation process of the hydraulic motor, and other axles lose the driving pressure, which is the normal reaction that the front hydraulic motor and the rear hydraulic motor are connected in parallel in a hydraulic pump oil supply system.
The reason for this is that when one wheel loses adhesion to the ground, the reaction force of the wheel is reduced to a minimum, and at the same time, the pressure of the oil in the pipe system is equal, and the relatively low pressure is incapable of driving the wheel with adhesion, so that a large amount of hydraulic oil is quickly lost on the hydraulic motor driving the slipping wheel, and the vehicle cannot run.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a valve block and a hydraulic four-wheel-drive power distribution mechanism based on the valve block.
In order to achieve the above object of the present invention, the present invention provides a valve block provided with an oil inlet, a first oil outlet and a second oil outlet;
the valve block comprises a first sequence valve, a second sequence valve and a logic valve, wherein oil inlets of the first sequence valve and the second sequence valve are used as oil inlets of the valve block;
the first sequence valve control oil port is connected with a first interface of a second oil way of the logic valve, the second interface of the second oil way is connected with an oil outlet of the second sequence valve, and the oil outlet of the second sequence valve is a second oil outlet of the valve block; the second sequential valve control oil port is connected with a first interface of a first oil way of the logic valve, the second interface of the first oil way is connected with an oil outlet of the first sequential valve, and the oil outlet of the first sequential valve is a first oil outlet of the valve block.
The valve block has simple structure and wide application range, is particularly suitable for solving the problem that when a hydraulic pump drives two hydraulic motors, when the reaction force born by one hydraulic motor is reduced, a large amount of hydraulic oil is quickly lost on the hydraulic motor, and can effectively limit the loss of a large amount of hydraulic oil through the hydraulic motor and maintain the working pressure of the other hydraulic motor.
Further, the device also comprises a first one-way valve and a second one-way valve, wherein the input end of the first one-way valve is connected with the oil outlet of the first sequence valve, and the output end of the first one-way valve is connected with the oil inlet of the first sequence valve;
the input end of the second one-way valve is connected with the oil outlet of the second sequence valve, and the output end of the second one-way valve is connected with the oil inlet of the second sequence valve.
The first check valve and the second check valve have the function of disabling the first sequence valve and the second sequence valve when the high-pressure hydraulic oil enters from the first sequence valve oil outlet and the second sequence valve oil outlet in the opposite direction, and directly returning to the hydraulic pump for supplying the hydraulic oil through the first check valve and the second check valve.
The invention also provides a hydraulic four-wheel drive power distribution mechanism which comprises a first valve block and a second valve block, wherein the first valve block and the second valve block are the valve blocks;
the oil inlet of the first valve block is connected with a first oil port of the hydraulic pump, the first oil outlet of the first valve block is connected with a first oil port of the precursor hydraulic motor, and the second oil outlet of the first valve block is connected with a first oil port of the rear-drive hydraulic motor;
the oil inlet of the second valve block is connected with a second oil port of the hydraulic pump, the first oil outlet of the second valve block is connected with a second oil port of the precursor hydraulic motor, and the second oil outlet of the second valve block is connected with a second oil port of the rear-drive hydraulic motor;
the first hydraulic pump oil port and the second hydraulic pump oil port are not simultaneously a high-pressure oil outlet or a low-pressure oil return port.
After the valve block is adopted by the hydraulic four-wheel drive power distribution mechanism, the problem that a large amount of hydraulic oil runs off rapidly on a hydraulic motor driving the slipped tyre when the tyre slips, so that a vehicle cannot run can be effectively solved.
Further, a third one-way valve which flows in the direction of the hydraulic pump is arranged between the first hydraulic port of the hydraulic pump and the oil tank, and a fourth one-way valve which flows in the direction of the hydraulic pump is arranged between the second hydraulic port of the hydraulic pump and the oil tank. And supplementing oil to a pipeline between the hydraulic pump and the oil tank through the third check valve and the fourth check valve.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic structural view of a valve block;
fig. 2 is a schematic structural view of a hydraulic four-wheel drive power distribution mechanism.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, unless otherwise specified and defined, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanical or electrical, or may be in communication with each other between two elements, directly or indirectly through intermediaries, as would be understood by those skilled in the art, in view of the specific meaning of the terms described above.
As shown in fig. 1, the present invention provides a valve block having an oil inlet, a first oil outlet, and a second oil outlet.
The valve block comprises a first sequence valve 2, a second sequence valve 4 and a logic valve 7, wherein oil inlets of the first sequence valve 2 and the second sequence valve 4 serve as oil inlets of the valve block. The oil inlets of the first and second sequence valves 2, 4 may be connected to the same line, the line oil inlet 3 being the oil inlet of the valve block.
The first sequence valve control oil port 9 is connected with a second oil way first interface 10 of the logic valve 7, the second oil way second interface 14 is connected with a second sequence valve oil outlet 8, and the second sequence valve oil outlet 8 is a second oil outlet of the valve block; the second sequence valve control oil port 12 is connected with a first oil way first interface 13 of the logic valve 7, the first oil way second interface 11 is connected with the first sequence valve oil outlet 6, and the first sequence valve oil outlet 6 is a first oil outlet of the valve block.
In practical application, the oil inlet of the valve block is connected with an external high-pressure oil outlet, such as a hydraulic pump high-pressure oil outlet, the first oil outlet of the valve block is connected with a first hydraulic motor, and the second oil outlet of the valve block is connected with a second hydraulic motor.
The external high-pressure oil is input from an oil inlet of the valve block, the valve block is internally divided into two paths, the first path is communicated with the first sequence valve 2, the second path is communicated with the second sequence valve 4, the first sequence valve oil outlet 6 and the second sequence valve oil outlet 8 provide system feedback pressure for the logic valve 7, and the logic valve 7 is internally communicated with the first sequence valve 2 and the second sequence valve 4 respectively; the throttle valve inside the logic valve 7 can manually set the working pressure of the depressurization output, and the logic valve 7 communicates the actual working pressures of the two hydraulic motors. The feedback pressure of the control oil port 12 of the second sequence valve 4 is communicated with the oil outlet 6 of the first sequence valve through a throttle valve inside the logic valve 7. The feedback pressure of the control oil port 9 of the first sequence valve 2 is communicated with the oil outlet 8 of the second sequence valve through the other throttle valve inside the logic valve 7.
The output pressures of the first sequence valve 2 and the second sequence valve 4 are kept consistent in the working pressure range of the system, when the first hydraulic motor slips, the working pressure of the first hydraulic motor can be rapidly reduced, the oil outlet 6 of the first sequence valve is fed back to the logic valve 7, the logic valve 7 feeds back the highest pressure to the first sequence valve 2, the first sequence valve 2 plays a role in throttling, a large amount of hydraulic oil is limited to run off through the first hydraulic motor, and the working pressure of the second hydraulic motor is kept. Under normal operation, the feedback pressure on the first sequence valve 2 and the second sequence valve 4 is the highest pressure for the two hydraulic motors to operate, so that the flow rate of the hydraulic motors output by the first sequence valve 2 and the second sequence valve 4 is controlled to be basically unchanged, and a large amount of oil is not lost through the slipping hydraulic motors.
The feedback pressure of the hydraulic motor with adhesive force is communicated with the hydraulic motor with low pressure through a throttle valve in the logic valve 7, so that the feedback pressure is caused, the throttle pressure is automatically reduced in the first sequence valve 2 and the second sequence valve 4, the pressure applied to the hydraulic motor is increased, and the automatic distribution of the power of the hydraulic system is realized. When the hydraulic motor driving the slipping tire resumes the driving pressure, the system automatically resumes the original set state.
As a preferable scheme of the valve block, the valve block further comprises a first one-way valve 1 and a second one-way valve 5, wherein the input end of the first one-way valve 1 is connected with the oil outlet 6 of the first sequence valve, and the output end of the first one-way valve 1 is connected with the oil inlet of the first sequence valve 2. The input end of the second one-way valve 5 is connected with the oil outlet 8 of the second sequence valve, and the output end of the second one-way valve 5 is connected with the oil inlet of the second sequence valve 4.
The first check valve 1 and the second check valve 5 have the function of enabling the first sequence valve 2 and the second sequence valve 4 to lose function when high-pressure hydraulic oil enters from the opposite directions of the first sequence valve oil outlet 6 and the second sequence valve oil outlet 8, and hydraulic oil directly passes through the first check valve 1 and the second check valve 5, so that the first sequence valve 2 and the second sequence valve 4 are avoided.
The invention also provides a hydraulic four-wheel drive power distribution mechanism which comprises a first valve block A and a second valve block B, wherein the first valve block A and the second valve block B are the valve blocks;
the oil inlet of the first valve block A is connected with a first oil port of the hydraulic pump 15, the first oil outlet of the first valve block A is connected with a first oil port of the precursor hydraulic motor 16, and the second oil outlet of the first valve block A is connected with a first oil port of the rear-drive hydraulic motor 17.
The oil inlet of the second valve block B is connected with a second oil port of the hydraulic pump 15, the first oil outlet of the second valve block B is connected with a second oil port of the precursor hydraulic motor 16, and the second oil outlet of the second valve block B is connected with a second oil port of the rear-drive hydraulic motor 17.
The first oil port of the hydraulic pump 15 and the second oil port of the hydraulic pump 15 are not simultaneously a high-pressure oil outlet or a low-pressure oil return port.
A third check valve which flows in the direction of the hydraulic pump 15 is arranged between the first oil port of the hydraulic pump 15 and the oil tank 18, and a fourth check valve which flows in the direction of the hydraulic pump 15 is arranged between the second oil port of the hydraulic pump 15 and the oil tank 18. And supplementing oil to the pipeline through the third one-way valve and the fourth one-way valve.
The hydraulic four-wheel drive power distribution mechanism can be applied to various hydraulic drive machines, such as agricultural machinery.
When the first oil port of the hydraulic pump 15 is a high-pressure oil outlet and the second oil port of the hydraulic pump 15 is a low-pressure oil return port, the front-drive hydraulic motor 16 and the rear-drive hydraulic motor 17 rotate forward, and hydraulic oil output by the second oil ports of the front-drive hydraulic motor 16 and the rear-drive hydraulic motor 17 returns to the hydraulic pump 15 through the first check valve 1 and the second check valve 5 in the second valve block B.
When the second oil port of the hydraulic pump 15 is a high-pressure oil outlet port and the first oil port of the hydraulic pump 15 is a low-pressure oil return port, the front-drive hydraulic motor 16 and the rear-drive hydraulic motor 17 are reversed, and hydraulic oil output from the first oil ports of the front-drive hydraulic motor 16 and the rear-drive hydraulic motor 17 returns to the hydraulic pump 15 through the first check valve 1 and the second check valve 5 in the first valve block a.
After the valve block is adopted by the hydraulic four-wheel drive power distribution mechanism, the problem that a large amount of hydraulic oil runs off rapidly on a hydraulic motor driving the slipped tyre when the tyre slips, so that a vehicle cannot run can be effectively solved.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (4)
1. A valve block, characterized in that: the valve block is provided with an oil inlet, a first oil outlet and a second oil outlet;
the valve block comprises a first sequence valve (2), a second sequence valve (4) and a logic valve (7), wherein oil inlets of the first sequence valve (2) and the second sequence valve (4) are used as oil inlets of the valve block;
the first sequence valve control oil port (9) is connected with a first interface (10) of a second oil way of the logic valve (7), the second interface (14) of the second oil way is connected with an oil outlet (8) of the second sequence valve, and the oil outlet (8) of the second sequence valve is a second oil outlet of the valve block; the second sequential valve control oil port (12) is connected with a first oil way first interface (13) of the logic valve (7), the first oil way second interface (11) is connected with a first sequential valve oil outlet (6), and the first sequential valve oil outlet (6) is a first oil outlet of the valve block.
2. The valve block of claim 1, wherein: the novel hydraulic oil pump further comprises a first one-way valve (1) and a second one-way valve (5), wherein the input end of the first one-way valve (1) is connected with the oil outlet (6) of the first sequence valve, and the output end of the first one-way valve (1) is connected with the oil inlet of the first sequence valve (2);
the input end of the second one-way valve (5) is connected with the oil outlet (8) of the second sequence valve, and the output end of the second one-way valve (5) is connected with the oil inlet of the second sequence valve (4).
3. The utility model provides a power distribution mechanism for hydraulic pressure four-wheel drive which characterized in that: comprising a first valve block (a) and a second valve block (B), the first valve block (a) and the second valve block (B) being the valve blocks of claim 2;
an oil inlet of the first valve block (A) is connected with a first oil port of the hydraulic pump (15), a first oil outlet of the first valve block (A) is connected with a first oil port of the precursor hydraulic motor (16), and a second oil outlet of the first valve block (A) is connected with a first oil port of the rear-drive hydraulic motor (17);
the oil inlet of the second valve block (B) is connected with a second oil port of the hydraulic pump (15), the first oil outlet of the second valve block (B) is connected with a second oil port of the precursor hydraulic motor (16), and the second oil outlet of the second valve block (B) is connected with a second oil port of the rear-drive hydraulic motor (17);
the first oil port of the hydraulic pump (15) and the second oil port of the hydraulic pump (15) are not simultaneously high-pressure oil outlets or low-pressure oil returns.
4. The hydraulic four-wheel drive power distribution mechanism according to claim 3, wherein: a third one-way valve which flows in the direction of the hydraulic pump (15) is arranged between the first oil port of the hydraulic pump (15) and the oil tank (18), and a fourth one-way valve which flows in the direction of the hydraulic pump (15) is arranged between the second oil port of the hydraulic pump (15) and the oil tank (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811494963.6A CN109404360B (en) | 2018-12-07 | 2018-12-07 | Valve block and hydraulic four-wheel-drive power distribution mechanism based on same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811494963.6A CN109404360B (en) | 2018-12-07 | 2018-12-07 | Valve block and hydraulic four-wheel-drive power distribution mechanism based on same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109404360A CN109404360A (en) | 2019-03-01 |
| CN109404360B true CN109404360B (en) | 2024-01-19 |
Family
ID=65457839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811494963.6A Active CN109404360B (en) | 2018-12-07 | 2018-12-07 | Valve block and hydraulic four-wheel-drive power distribution mechanism based on same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109404360B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62105721A (en) * | 1985-11-05 | 1987-05-16 | Toyota Motor Corp | Anti-skid device for four wheel drive vehicle |
| DE19833942A1 (en) * | 1998-07-28 | 2000-02-10 | Brueninghaus Hydromatik Gmbh | Hydrostatic drive with differential lock |
| CN205446238U (en) * | 2016-01-06 | 2016-08-10 | 潍柴动力股份有限公司 | Use flow divider on hydrostatic 4 wheel driven mobile machinery |
| CN106224318A (en) * | 2016-09-13 | 2016-12-14 | 九方泰禾国际重工(青岛)股份有限公司 | Off roader hydraulic pressure four-wheel drive HYDRAULIC CONTROL SYSTEM valve group |
| CN106402067A (en) * | 2016-11-21 | 2017-02-15 | 徐工消防安全装备有限公司 | Four-drive traveling control valve, open type hydraulic system equipped with same as well as traveling machine |
| CN209164226U (en) * | 2018-12-07 | 2019-07-26 | 重庆神工农业装备有限责任公司 | A kind of valve block and the hydraulic 4 wheel driven power distributing mechanism based on the valve block |
-
2018
- 2018-12-07 CN CN201811494963.6A patent/CN109404360B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62105721A (en) * | 1985-11-05 | 1987-05-16 | Toyota Motor Corp | Anti-skid device for four wheel drive vehicle |
| DE19833942A1 (en) * | 1998-07-28 | 2000-02-10 | Brueninghaus Hydromatik Gmbh | Hydrostatic drive with differential lock |
| CN205446238U (en) * | 2016-01-06 | 2016-08-10 | 潍柴动力股份有限公司 | Use flow divider on hydrostatic 4 wheel driven mobile machinery |
| CN106224318A (en) * | 2016-09-13 | 2016-12-14 | 九方泰禾国际重工(青岛)股份有限公司 | Off roader hydraulic pressure four-wheel drive HYDRAULIC CONTROL SYSTEM valve group |
| CN106402067A (en) * | 2016-11-21 | 2017-02-15 | 徐工消防安全装备有限公司 | Four-drive traveling control valve, open type hydraulic system equipped with same as well as traveling machine |
| CN209164226U (en) * | 2018-12-07 | 2019-07-26 | 重庆神工农业装备有限责任公司 | A kind of valve block and the hydraulic 4 wheel driven power distributing mechanism based on the valve block |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109404360A (en) | 2019-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107856732B (en) | Electro-hydraulic steering hydraulic system for multi-mode control | |
| CN110435757B (en) | Electric control steering system of steering axle | |
| CN103522896B (en) | Front wheel auxiliary drive system of land leveller | |
| CN102501758B (en) | Fully-hydraulically-driven travelling system for underground trackless rubber-tired car | |
| CN102343902B (en) | Air pressure brake unit and multi-shaft automobile chassis with same | |
| CN204870526U (en) | Hydraulic hybrid vehicle and hydraulic hybrid system thereof | |
| CN109404360B (en) | Valve block and hydraulic four-wheel-drive power distribution mechanism based on same | |
| CN103692908A (en) | Hydraulic differential system for all-hydraulic traveling vehicle | |
| CN107757586B (en) | Pneumatic braking system of large transport tractor | |
| CN209164226U (en) | A kind of valve block and the hydraulic 4 wheel driven power distributing mechanism based on the valve block | |
| CN208565099U (en) | It is a kind of to turn to preferential equipment for plant protection hydraulic system and fog machine | |
| CN105508323A (en) | Hydraulic four-wheel drive antiskid device of self-propelled harvester | |
| CN108443247B (en) | Independent hydraulic steering system of forklift | |
| CN203460698U (en) | Front-wheel auxiliary drive system for land leveler | |
| CN108583680B (en) | Independent steering system of full hydraulic forklift | |
| CN210970681U (en) | Full-hydraulic four-wheel drive traveling system | |
| CN201721441U (en) | Pneumatic-pressure brake unit and multi-axle automobile chassis adopting same | |
| CN205371118U (en) | Self -propelled harvester hydraulic pressure four wheel drive antiskid | |
| CN110630571B (en) | Centering control valve group | |
| CN211969399U (en) | Control device for preventing brake variable pump from being cut off when stepping on four-wheel drive state | |
| CN210454946U (en) | An electronically controlled steering system for a steering axle | |
| CN110667376A (en) | Full-hydraulic four-wheel drive traveling system | |
| GB2362700A (en) | Anti backspin vehicle propulsion arrangement | |
| CN220600124U (en) | Valve-controlled time-sharing four-wheel-drive hydraulic system | |
| CN220378578U (en) | Two-wheel drive and four-wheel drive conversion control system of traveling vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210209 Address after: No. 6, Jiangxi Road, Nanan District, Chongqing City, Chongqing Applicant after: CHONGQING MACHINE TOOL (Group) Co.,Ltd. Address before: No. 6, Jiangxi Road, Nanan District, Chongqing City, Chongqing Applicant before: CHONGQING SHENGONG AGRICULTURE EQUIPMENT Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |