CN218644552U - Steering centering hydraulic system, rear axle steering device and engineering vehicle - Google Patents
Steering centering hydraulic system, rear axle steering device and engineering vehicle Download PDFInfo
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- CN218644552U CN218644552U CN202222856652.8U CN202222856652U CN218644552U CN 218644552 U CN218644552 U CN 218644552U CN 202222856652 U CN202222856652 U CN 202222856652U CN 218644552 U CN218644552 U CN 218644552U
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- 239000003921 oil Substances 0.000 claims abstract description 178
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 18
- 238000005086 pumping Methods 0.000 claims abstract description 5
- 230000007935 neutral effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000446 fuel Substances 0.000 description 10
- 238000004146 energy storage Methods 0.000 description 4
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model belongs to the technical field of hydraulic machinery, in particular to a steering centering hydraulic system, a rear axle steering device and an engineering vehicle, wherein the steering centering hydraulic system comprises an oil supply oil way, a centering oil cylinder and a control assembly, and an energy accumulator and a main oil pump for pumping hydraulic oil are arranged in the oil supply oil way; the centering oil cylinder is communicated with an oil supply oil way; the control assembly comprises a pressure sensor and a control unit electrically connected with the pressure sensor, the pressure sensor is used for detecting the oil port pressure of the main oil pump, and the control unit controls the energy accumulator to store or release hydraulic oil according to the oil port pressure of the main oil pump. The utility model discloses need not be equipped with emergent centering pump and off-load valve by force in limited frame space, avoided because the trouble of emergent centering pump of installation and off-load valve leads to the risk that transfer case or gearbox damaged, improved the quality and the reliability of product greatly to manufacturing cost has been reduced.
Description
Technical Field
The utility model belongs to the technical field of hydraulic pressure machinery, especially, relate to a turn to centering hydraulic system, rear axle and turn to device and engineering vehicle.
Background
The all-terrain crane has a multi-axle steering function and multiple steering modes, and is provided with a steering centering hydraulic system for centering during steering. The steering centering hydraulic system comprises a centering oil cylinder and a main pump for providing oil, meanwhile, in order to guarantee driving safety, an emergency centering pump and an unloading valve need to be configured in the steering centering hydraulic system besides the main pump, when the main pump fails and cannot supply oil, the emergency centering pump supplies oil, and the locking of the middle position of the centering oil cylinder is guaranteed. However, the emergency centering pump in the existing steering centering hydraulic system needs to be installed on the transfer case or the gearbox, so that the transfer case or the gearbox needs to be equipped with a corresponding power output device, the product cost is increased, and the main chord of the tower crane is easily damaged. Moreover, when the emergency steering pump or the unloading valve breaks down, the corresponding transfer case or the corresponding gearbox is often damaged, and the quality and reliability of the product are affected. In addition, due to the limitation of the space of the frame, the emergency centering pump cannot be installed or has an installation interference phenomenon.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims at providing a turn to centering hydraulic system, rear axle and turn to device and engineering vehicle, aim at solving the technical problem that the centering hydraulic system that turns to among the prior art needs to be equipped with emergent centering pump.
In order to achieve the above object, the utility model provides a turn to centering hydraulic system, wherein, turn to centering hydraulic system and include:
the oil supply oil way is provided with an energy accumulator and a main oil pump for pumping hydraulic oil;
the centering oil cylinder is communicated with an oil supply oil way; and
the control assembly comprises a pressure sensor and a control unit electrically connected with the pressure sensor, the pressure sensor is used for detecting the oil port pressure of the main oil pump, and the control unit controls the energy accumulator to store or release hydraulic oil according to the oil port pressure of the main oil pump.
The embodiment of the utility model provides an in, still be equipped with the check valve on the fuel feeding oil circuit, the check valve is located between main oil pump and the energy storage ware to make the hydraulic oil in the fuel feeding oil circuit from the main oil pump via the one-way valve towards the one-way circulation of energy storage ware.
The embodiment of the utility model provides an in, centering hydraulic system still includes the oil return circuit, and the centering hydro-cylinder includes head, meso position and end position, and the head and the end position of centering hydro-cylinder all communicate with the fuel feeding oil circuit, the meso position and the oil return circuit intercommunication of centering hydro-cylinder.
The embodiment of the utility model provides an in, the operating pressure of energy storage ware is greater than the interior pressure when the centering hydro-cylinder is in the meso position locking.
The embodiment of the utility model provides an in, be equipped with on the fuel feeding oil circuit to well valve, switch the oil inlet of well valve and connect fuel feeding oil circuit or oil tank, communicate to the first and last position of the working oil mouth of well valve and centering hydro-cylinder.
The embodiment of the utility model provides an in, to the valve be two three-way solenoid valves and be connected with the control unit electricity.
In the embodiment of the utility model provides an in, the main oil pump is constant voltage variable pump.
The embodiment of the utility model provides an in, still provide a rear axle and turn to device, this rear axle turns to device and includes automatically controlled steering hydraulic system and as above turn to centering hydraulic system, automatically controlled steering hydraulic system includes the automatically controlled valve bank that turns to of rear axle that is connected with the oil-out of main oil pump.
The embodiment of the utility model provides an in, still provide an engineering vehicle, this engineering vehicle includes as above rear axle steering device.
The embodiment of the utility model provides an in, engineering vehicle is including the speed sensor who is used for measuring the speed of traveling, and the control assembly is connected with the speed sensor electricity to can be according to engineering vehicle's speed control centering hydro-cylinder and the intercommunication or the cutting off of fuel feeding oil circuit.
Through the technical scheme, the embodiment of the utility model provides a turn to centering hydraulic system has following beneficial effect:
the utility model provides a turn to centering hydraulic system and use the fuel feeding oil circuit to supply oil for the centering hydro-cylinder, be equipped with the energy storage ware as emergent oil supply to under the circumstances of having guaranteed the main oil pump damage, the fuel feeding oil circuit still possesses the fuel feeding function. The utility model discloses need not be equipped with emergent centering pump and off-load valve by force in limited frame space, avoided because the trouble of the emergent centering pump of installation and off-load valve leads to the risk that transfer case or gearbox damaged. In addition, the energy accumulator can also store surplus hydraulic oil in the oil supply oil way when the main oil pump works normally, so that auxiliary functions of stabilizing oil pressure, absorbing flow impact and the like are achieved.
Other features and advantages of the present invention will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide an understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention, but do not constitute a limitation of the invention. In the drawings:
fig. 1 is a schematic diagram of a steering centering hydraulic system when a centering cylinder is in a centering locking state according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a steering centering hydraulic system when the centering cylinder is in a floating state according to an embodiment of the present invention.
Description of the reference numerals
| Reference numerals | Name(s) | Reference numerals | Name (R) |
| 10 | |
20 | One- |
| 30 | |
40 | |
| 50 | |
60 | Centering oil cylinder |
| L1 | |
70 | Rear axle electric control steering valve group |
| L2 | Oil return circuit |
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It should be understood that the description herein of specific embodiments is for purposes of illustration and explanation only and is not intended to limit the invention.
The steering centering hydraulic system according to the present invention is described below with reference to the drawings.
As shown in fig. 1, in an embodiment of the present invention, a steering centering hydraulic system is provided, wherein the steering centering hydraulic system includes an oil supply path L1, a centering oil cylinder 60 and a control assembly, and an energy accumulator 40 and a main oil pump 10 for pumping hydraulic oil are disposed in the oil supply path L1; the centering oil cylinder 60 is communicated with an oil supply path L1; the control assembly includes a pressure sensor 30 and a control unit electrically connected to the pressure sensor 30, the pressure sensor 30 is configured to detect a port pressure of the main oil pump 10 and send a detected port pressure signal to the control unit, and the control unit controls the accumulator 40 to store or release hydraulic oil according to the port pressure of the main oil pump 10.
Specifically, the oil supply line L1 is used to supply oil to the centering oil cylinder 60, so that the centering oil cylinder 60 enters a centering locking state, and an emergency centering function of the steering centering hydraulic system is realized. When the main oil pump 10 can work normally, the oil source of the whole steering centering hydraulic system is provided by the main oil pump 10, the oil pressure in the oil supply oil path L1 is stable, and at the moment, the energy accumulator 40 is in a pressure stabilizing and energy storing state and stores redundant hydraulic oil in the centering hydraulic system; when the main oil pump 10 fails and normal oil supply cannot be performed, the pressure sensor 30 detects the reduction of the oil port pressure of the main oil pump 10 in real time, at this time, the energy accumulator 40 serves as an emergency oil source to release the previously stored hydraulic oil, the oil supply oil path L1 still has the oil source to supply the oil source to the centering oil cylinder 60, and the steering centering hydraulic system still can achieve the emergency centering function.
The utility model discloses compare with the centering hydraulic system that turns to among the prior art, need not be equipped with emergent centering pump and off-load valve by force in limited frame space, avoided because the trouble of installation emergent centering pump and off-load valve leads to the risk that transfer case or gearbox damaged, improved the quality and the reliability of product greatly to manufacturing cost has been reduced. In addition, the accumulator 40 can selectively store or release hydraulic oil according to the oil pressure of the oil supply passage L1, thereby performing auxiliary functions such as stabilizing the oil pressure and absorbing flow impact.
Further, the oil supply path L1 is further provided with a check valve 20, the check valve 20 is located between the main oil pump 10 and the energy accumulator 40, so that the hydraulic oil in the oil supply path L1 flows in a single direction from the main oil pump 10 to the energy accumulator 40 through the check valve 20, when the main oil pump 10 fails and the energy accumulator 40 releases the hydraulic oil as an emergency oil source, in order to prevent the hydraulic oil released by the energy accumulator 40 from flowing back to the main oil pump 10, it is ensured that the oil supply path L1 has enough hydraulic oil, so as to meet the oil pressure condition required by the centering oil cylinder 60 to enter the centering locking state.
It should be noted that the working pressure of the accumulator 40 needs to be set to be greater than the internal pressure of the centering cylinder 60 when the centering cylinder 60 is in the neutral lock state, so as to meet the oil supply demand of the centering cylinder 60 when the main oil pump 10 fails.
The embodiment of the utility model provides an in, centering hydraulic system still includes oil return circuit L2, and centering hydro-cylinder 60 includes head, meso position and end position, is equipped with on the oil supply circuit L1 to well valve 50, switches to the oil inlet of well valve 50 and connects oil supply circuit L1 or oil tank, and the hydraulic fluid port of well valve 50 and the head and the end position of centering hydro-cylinder 60 communicate.
As shown in fig. 1, an oil inlet of the centering valve 50 is switched and connected with an oil supply line L1, when the centering oil cylinder 60 is in a neutral locking state, a head position and a tail position of the centering oil cylinder 60 are both communicated with the oil supply line L1, the neutral position of the centering oil cylinder 60 is communicated with an oil return line L2, the oil supply line L1 simultaneously outputs oil to the head position and the tail position, so that the centering oil cylinder 60 enters the neutral locking state, and during the period, the centering oil cylinder 60 discharges residual oil into an oil tank through the oil return line L2 connected with the neutral position, so as to keep the oil balance of the whole interior of the centering oil cylinder 60. Since the centering cylinder 60 is well known in the prior art, the principle thereof will not be described in detail herein.
As shown in fig. 2, the oil inlet of the centering valve 50 is connected to an oil tank in a switching manner, when the centering oil cylinder 60 is in a floating state, the head position, the middle position and the tail position of the centering oil cylinder 60 are all communicated with an oil path, and oil in the centering oil cylinder 60 can be freely communicated, so that the centering oil cylinder 60 releases the middle position locking state, and the centering hydraulic system is turned to close the emergency centering function.
Further, the centering valve 50 is a two-position three-way solenoid valve and is electrically connected to the control unit. The centering valve 50 comprises an electromagnet and a valve core, when the electromagnet is electrified, the valve core of the centering valve 50 is switched to a first switching position, and when the first switching position is adopted, the first position and the last position of the centering oil cylinder 60 are both communicated with the oil supply oil path L1; when the electromagnet is in power failure, the valve core of the centering valve 50 is switched to a second switching position, and when the valve core is in the second switching position, the first position and the last position of the centering oil cylinder 60 are both communicated with the oil tank. The control unit controls the valve core to be switched to the first switching position or the second switching position by controlling the power-on and power-off of the electromagnet.
The embodiment of the utility model provides an in, the preferred constant voltage variable pump that is of main oil pump 10, the oil pressure stability in the assurance fuel feeding oil circuit L1 that constant voltage variable pump can be better is favorable to centering hydro-cylinder 60's work more, but the utility model discloses an application scope is not limited to this, still can be for other pumping installations such as gear pump, positive displacement pump.
The embodiment of the utility model provides an in, still provide a rear axle turns to device, this rear axle turns to device include automatically controlled steering hydraulic system and as above turn to centering hydraulic system, automatically controlled steering hydraulic system includes the automatically controlled valve bank 70 that turns to of rear axle that is connected with the oil-out of main oil pump 10, when centering hydro-cylinder 60 is in the unsteady state shown in fig. 2, main oil pump 10 gives the automatically controlled valve bank 70 oil supply that turns to of rear axle, the automatically controlled valve bank 70 of rear axle can play the effect that the control rear axle turned to. The way that the main oil pump 10 is shared by the electrically controlled steering hydraulic system and the steering centering hydraulic system enables the energy of the main oil pump 10 to be utilized to the maximum extent, and meanwhile, mutual interference between the steering hydraulic system and the steering centering hydraulic system cannot be caused.
The embodiment of the present invention provides an engineering vehicle, which includes the rear axle steering device as described above, and has the beneficial effects of all the embodiments described above because the engineering vehicle adopts all the embodiments of the above-mentioned electric control steering hydraulic system and the above-mentioned rear axle steering device.
In addition, the engineering vehicle comprises a speed measuring device for measuring the running speed, and the control component is electrically connected with the speed measuring device and can control the connection or disconnection of the centering oil cylinder 60 and the oil supply oil way L1 according to the running speed of the engineering vehicle. Specifically, when the traveling speed of the engineering vehicle is higher, the control assembly controls and communicates the centering oil cylinder 60 and the oil supply oil way L1, the steering centering hydraulic system starts the centering function, and the traveling safety of the engineering vehicle is protected; when the running speed of the engineering vehicle is low, the centering function is not needed, and the control assembly controls and cuts off the connection between the centering oil cylinder 60 and the oil supply oil way L1.
In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A steering centering hydraulic system, comprising:
the oil supply oil circuit is provided with an energy accumulator (40) and a main oil pump (10) for pumping hydraulic oil;
the centering oil cylinder (60) is communicated with the oil supply oil way (L1); and
the control assembly comprises a pressure sensor (30) and a control unit electrically connected with the pressure sensor (30), the pressure sensor (30) is used for detecting the oil port pressure of the main oil pump (10), and the control unit controls the energy accumulator (40) to store or release hydraulic oil according to the oil port pressure of the main oil pump (10).
2. The steering centering hydraulic system according to claim 1, wherein a check valve (20) is further disposed on the oil supply path (L1), and the check valve (20) is located between the main oil pump (10) and the accumulator (40), so that hydraulic oil in the oil supply path (L1) flows in one direction from the main oil pump (10) toward the accumulator (40) through the check valve (20).
3. The steering centering hydraulic system according to claim 1, further comprising an oil return path (L2), wherein the centering cylinder (60) comprises a head position, a middle position and a tail position, the head position and the tail position of the centering cylinder are both communicated with the oil supply path (L1), and the middle position of the centering cylinder (60) is communicated with the oil return path (L2).
4. Steering centering hydraulic system according to claim 3, characterized in that the working pressure of the accumulator (40) is greater than the internal pressure of the centering cylinder (60) when it is in neutral locking.
5. The steering centering hydraulic system according to claim 3, wherein a centering valve (50) is arranged on the oil supply path (L1), an oil inlet of the centering valve (50) is connected with the oil supply path (L1) or an oil tank in a switching manner, and a working oil port of the centering valve (50) is communicated with a head position and a tail position of the centering oil cylinder (60).
6. Steering centering hydraulic system according to claim 5, characterized in that said centering valve (50) is a two-position three-way solenoid valve and is electrically connected with said control unit.
7. Steering centering hydraulic system according to one of claims 1 to 6, characterized in that the main oil pump (10) is a constant pressure variable pump.
8. Rear axle steering arrangement, characterized in that it comprises an electrically controlled steering hydraulic system comprising a rear axle electrically controlled steering valve group (70) connected to the oil outlet of the main oil pump and a steering centering hydraulic system according to any one of claims 1 to 7.
9. A working vehicle, characterized in that the working vehicle comprises a rear axle steering device according to claim 8.
10. The work vehicle according to claim 9, characterized in that the work vehicle comprises a speed measuring device for measuring the running speed, and the control assembly is electrically connected with the speed measuring device and can control the connection or disconnection of the centering oil cylinder (60) and the oil supply path (L1) according to the running speed of the work vehicle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222856652.8U CN218644552U (en) | 2022-10-28 | 2022-10-28 | Steering centering hydraulic system, rear axle steering device and engineering vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222856652.8U CN218644552U (en) | 2022-10-28 | 2022-10-28 | Steering centering hydraulic system, rear axle steering device and engineering vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218644552U true CN218644552U (en) | 2023-03-17 |
Family
ID=85495565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222856652.8U Active CN218644552U (en) | 2022-10-28 | 2022-10-28 | Steering centering hydraulic system, rear axle steering device and engineering vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218644552U (en) |
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2022
- 2022-10-28 CN CN202222856652.8U patent/CN218644552U/en active Active
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