CN213598645U - Pressure control emergency valve - Google Patents
Pressure control emergency valve Download PDFInfo
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- CN213598645U CN213598645U CN202022350856.5U CN202022350856U CN213598645U CN 213598645 U CN213598645 U CN 213598645U CN 202022350856 U CN202022350856 U CN 202022350856U CN 213598645 U CN213598645 U CN 213598645U
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Abstract
The utility model provides a pressure control emergency valve, include: the valve body, install the two-position reversing valve of cross in the valve body, still include: the four-way two-position reversing valve adopts a horizontal slide valve type structure, when a valve core of the four-way two-position reversing valve is positioned on the left side, an emergency pump channel is communicated with an oil tank channel and a hydraulic steering gear channel is communicated with a main steering pump interface, when the valve core of the four-way two-position reversing valve is positioned on the right side, a third reversing interface is closed and the emergency pump channel is communicated with the hydraulic steering gear channel, and the four-way two-position reversing valve utilizes the adjustable direct-acting type overflow valve to complete reversing operation according to the oil pressure provided by a main steering pump. The utility model discloses set up adjustable direct-acting overflow valve, direct when the hydraulic pressure that the main steering pump provided is not enough with hydraulic flow zero and switch to the emergency pump and carry out the fuel feeding, the condition that though there is flow but no pressure can not effective power assisted steering that appears when avoiding traditional mode according to the flow switching emergency pump.
Description
Technical Field
The utility model relates to an auto steering ware accessory field especially relates to a pressure control emergency valve.
Background
The existing emergency valve is a flow control emergency valve, almost all heavy-duty vehicles adopt hydraulic power steering gears, and if the load of a steering axle is more than 6T, the existing emergency valve is provided with a steering gear emergency system, namely when a main steering pump suddenly loses effect, the emergency pump continuously provides power for the hydraulic steering gears through the emergency valve, so that the steering system still has a steering function. And if the flow of the main steering pump is larger than the preset flow, the emergency valve enables the flow of the emergency pump to directly flow back to the oil tank. The flow control emergency pump is also in a safety hidden trouble, when the main steering pump pumps hydraulic oil with a flow larger than a preset emergency flow but can not build pressure, the flow of the main steering pump is larger than the preset flow, so the emergency pump directly flows back to an oil tank through an emergency valve, and a steering system can not normally steer.
Disclosure of Invention
To the problem in the above-mentioned background art, the utility model provides a pressure control emergency valve, include: the valve body, install four-way two-position reversal valve in the valve body, still include: adjustable direct-acting overflow valve, said valve body has been seted up: the four-way two-position reversing valve adopts a horizontal sliding valve type structure, a right side channel of the four-way two-position reversing valve is communicated with the main steering pump interface, a second reversing interface of the four-way two-position reversing valve is communicated with the emergency pump interface through an emergency pump channel, a first reversing interface of the four-way two-position reversing valve is communicated with the hydraulic steering gear interface through a hydraulic steering gear channel, a third reversing interface of the four-way two-position reversing valve is communicated with the oil tank interface through an oil tank channel, when a valve core of the four-way two-position reversing valve is positioned on the left side, the emergency pump channel is communicated with the oil tank channel and the hydraulic steering gear channel is communicated with the main steering pump interface, when the valve core of the four-way two-position reversing valve is positioned on the right side, the third reversing interface is closed and the emergency pump channel is communicated with the hydraulic steering gear channel, the four-way two-position reversing valve completes reversing operation by using the adjustable direct-acting overflow valve according to the oil pressure provided by the main steering pump.
Furthermore, the left end and the right end of the valve core of the four-way two-position reversing valve are communicated, a throttle sheet is arranged on the left side of the valve core of the four-way two-position reversing valve, the adjustable direct-acting overflow valve is arranged on the left side of the four-way two-position reversing valve, the inlet of the adjustable direct-acting overflow valve is communicated with the four-way two-position reversing valve, and the outlet of the adjustable direct-acting overflow valve is communicated with the hydraulic steering gear channel.
Furthermore, a compression spring is arranged on the left side of the valve core of the four-way two-position reversing valve, and when the adjustable direct-acting overflow valve is opened, pressure difference is generated on two sides of the throttle sheet to push the valve core of the four-way two-position reversing valve to move leftwards; when the adjustable direct-acting overflow valve is closed, the throttle sheet has no pressure difference, and the compression spring pushes the four-way two-position reversing valve core to the right side.
Furthermore, the adjustable direct-acting overflow valve is a one-way pressure control valve, and is opened when the pressure provided by the main steering pump is greater than the set pressure, and is closed when the pressure provided by the main steering pump is less than the set pressure.
Further, the adjustable direct relief valve includes: the valve core of the adjustable direct-acting overflow valve, the pressure spring and the pressure adjusting device are connected, the first end of the pressure spring is connected with the valve core of the adjustable direct-acting overflow valve and tightly presses the valve core of the adjustable direct-acting overflow valve at the inlet position of the adjustable direct-acting overflow valve, the second end of the pressure spring is connected with the pressure adjusting device, and the pressure adjusting device can adjust the tightening state of the pressure spring.
Compared with the prior art, the utility model provides a pressure control emergency valve has following beneficial effect:
the utility model discloses set up adjustable direct-acting overflow valve, direct when the hydraulic pressure that the main steering pump provided is not enough with hydraulic flow zero and switch to the emergency pump and carry out the fuel feeding, the condition that though there is flow but no pressure can not effective power assisted steering that appears when avoiding traditional mode according to the flow switching emergency pump.
Description of the drawings:
fig. 1 is a schematic diagram of a pressure controlled emergency valve.
Fig. 2 is a configuration view of a pressure control emergency pump.
Fig. 3 is a sectional structural view of a pressure control emergency valve.
Wherein: 1-a valve body; 101-main steering pump interface; 102-hydraulic steering gear interface; 103-emergency pump interface; 104-tank interface; 2-four-way two-position reversing valve; a 201-four-way two-position reversing valve core; 202-a first commutation interface; 203-a second commutation interface; 204-a third commutation interface; 205-throttle plate; 206-a compression spring; 3-adjustable direct-acting overflow valve; 301-adjustable direct-acting relief valve core; 302-a pressure spring; 303-pressure regulating means; 4-differential two-position reversing valve; 6-emergency indicator light; 7-a hydraulic steering gear; 8-a main steering pump; 9-emergency pump.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person having ordinary skill in the art without creative efforts shall belong to the protection scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The present invention will be described in detail with reference to the drawings, and in order to describe the embodiments of the present invention in detail, the cross-sectional view showing the structure of the device will not be enlarged partially according to the general scale, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
Meanwhile, in the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper, lower, inner and outer" and the like are based on the directions or positional relationships shown in the drawings, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention. Furthermore, the terms first, second, or third are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The terms "mounted, connected and connected" in the present application are to be understood broadly, unless otherwise explicitly stated or limited, for example: can be fixedly connected, detachably connected or integrally connected; they may be mechanically, electrically, or directly connected, or indirectly connected through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-3, the utility model provides a pressure control emergency pump, include: valve body 1, install four-way two-position reversal valve 2 in the valve body 1, still include: adjustable direct-acting overflow valve 3, the valve body 1 of telling has seted up: the four-way two-position directional control valve comprises a main steering pump interface 101, a hydraulic steering gear interface 102, an emergency pump interface 103 and an oil tank interface 104, wherein the four-way two-position directional control valve 2 adopts a horizontal slide valve type structure, a right channel of the four-way two-position directional control valve 2 is communicated with the main steering pump interface 101, a first reversing interface 202 of the four-way two-position directional control valve 2 is communicated with the hydraulic steering gear interface 102 through a hydraulic steering gear channel, a second reversing interface 203 of the four-way two-position directional control valve 2 is communicated with the emergency pump interface 103 through an emergency pump channel, a third reversing interface 204 of the four-way two-position directional control valve 2 is communicated with the oil tank interface 104 through an oil tank channel, when a valve core 201 of the four-way two-position directional control valve is positioned on the left side, the emergency pump channel is communicated with the oil tank channel, the hydraulic steering gear channel is communicated with the main steering pump interface 101, and the left end and right, a throttle sheet 205 is arranged on the left side of the four-way two-position reversing valve spool 201, the adjustable direct-acting overflow valve 3 is arranged on the left side of the four-way two-position reversing valve 2, an inlet of the adjustable direct-acting overflow valve 3 is communicated with the four-way two-position reversing valve 2, an outlet of the adjustable direct-acting overflow valve 3 is communicated with the hydraulic steering gear channel, a compression spring 206 is arranged on the left side of the four-way two-position reversing valve spool 201, and when the adjustable direct-acting overflow valve 3 is opened, pressure difference is generated on two sides of the throttle sheet 205 to push the four-way two-position reversing valve spool 201 to move leftwards; when the adjustable direct-acting overflow valve 3 is closed, the throttle sheet 205 has no pressure difference, the compression spring 206 pushes the four-way two-position directional valve core 201 to the right side, when the four-way two-position directional valve core 201 is positioned on the right side, the third reversing port 204 is closed, the emergency pump channel is communicated with the hydraulic steering gear channel, and the four-way two-position directional valve 2 utilizes the adjustable direct-acting overflow valve 3 to complete the reversing operation according to the oil pressure provided by the main steering pump 8
The adjustable direct-acting overflow valve 3 is a one-way pressure control valve, the adjustable direct-acting overflow valve 3 is opened when the pressure provided by the main steering pump 8 is greater than the set pressure, the adjustable direct-acting overflow valve 3 is closed when the pressure provided by the main steering pump 8 is less than the set pressure, and the adjustable direct-acting overflow valve comprises: the pressure regulating device comprises an adjustable direct-acting overflow valve spool 301, a pressure spring 302 and a pressure regulating device 303, wherein a first end of the pressure spring 302 is connected with the adjustable direct-acting overflow valve spool 301 and tightly presses the adjustable direct-acting overflow valve spool 301 at the inlet position of the adjustable direct-acting overflow valve 3, a second end of the pressure spring 302 is connected with the pressure regulating device 303, and the pressure regulating device 303 can regulate the tightening state of the pressure spring 302.
Principle of operation
Under normal conditions, the engine drives the main steering pump 8 to pump out hydraulic oil to open the adjustable direct-acting overflow valve 3, the flow overflowing from the adjustable direct-acting overflow valve passes through the throttle sheet 205, pressure difference is generated at two ends of the throttle sheet 205 to push the valve core 201 of the four-way two-position reversing valve leftwards, so that the main steering pump 8 supplies oil for the hydraulic steering gear 7, the flow of the emergency pump 9 flows through the differential two-position reversing valve 4, the valve core of the differential two-position reversing valve 4 moves rightwards, the circuit of the emergency indicator lamp 6 is disconnected, and finally the flow of the emergency pump 9 flows back to the oil tank.
In the abnormal case: when the pressure of the main steering pump 8 cannot reach the preset pressure value or no flow of the adjustable direct-acting overflow valve 3, the main steering pump 8 cannot open the adjustable direct-acting overflow valve 3, so that no pressure difference exists between two ends of the throttle sheet 205, the valve core 201 of the four-way two-position reversing valve moves rightwards under the pushing of the compression spring 206, the flow of the emergency pump 9 is reversed through the four-way two-position reversing valve 2, oil is directly supplied to the hydraulic steering gear 7, and the hydraulic steering gear 7 still has the steering capacity. And the differential two-position directional control valve 4 has no oil to flow through, so the valve core of the differential two-position directional control valve 4 moves to the left under the action of spring force to connect the circuit of the emergency indicator lamp 6, and the emergency indicator lamp 6 is lighted.
Finally, it should be noted that: although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims. Moreover, the scope of the present invention is not intended to be limited to the particular embodiments of the process, machine, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure of the present invention, processes, machines, means, methods, or steps, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present invention. Accordingly, the appended claims are intended to include within their scope such processes, devices, means, methods, or steps.
Claims (5)
1. A pressure controlled emergency valve comprising: the valve body, install four-way two-position reversal valve in the valve body, its characterized in that still includes: adjustable direct-acting overflow valve, said valve body has been seted up: the hydraulic steering system comprises a main steering pump interface, a hydraulic steering gear interface, an emergency pump interface and an oil tank interface, wherein the four-way two-position reversing valve adopts a horizontal slide valve type structure, a right side channel of the four-way two-position reversing valve is communicated with the main steering pump interface, a second reversing interface (203) of the four-way two-position reversing valve is communicated with the emergency pump interface through an emergency pump channel, a first reversing interface (202) of the four-way two-position reversing valve is communicated with the hydraulic steering gear interface through a hydraulic steering gear channel, a third reversing interface (204) of the four-way two-position reversing valve is communicated with the oil tank interface through an oil tank channel, when the hydraulic pressure of a main pump is greater than the pressure of the adjustable direct-acting overflow valve (3), the adjustable direct-acting overflow valve (3) is opened, the valve core (201) of the four-way two-position reversing valve is pushed to the left position by the hydraulic pressure, and the emergency, and the hydraulic steering gear channel is communicated with the main steering pump interface, when the pressure of the main pump is lower than the pressure of the adjustable direct-acting overflow valve (3), the valve core of the four-way two-position reversing valve moves rightwards under the action of the elastic force of the spring, the third reversing interface (204) is closed, and the emergency pump channel is communicated with the hydraulic steering gear channel to play an emergency role.
2. The pressure control emergency valve according to claim 1, wherein the left end and the right end of the four-way two-position reversing valve core are communicated, a throttle plate is arranged on the left side of the four-way two-position reversing valve core, the adjustable direct-acting overflow valve is arranged on the left side of the four-way two-position reversing valve, an inlet of the adjustable direct-acting overflow valve is communicated with the four-way two-position reversing valve, and an outlet of the adjustable direct-acting overflow valve is communicated with the hydraulic steering gear channel.
3. The pressure control emergency valve according to claim 2, wherein a compression spring is installed on the left side of the valve core of the four-way two-position reversing valve, and when the adjustable direct-acting overflow valve is opened, pressure difference is generated on two sides of the throttle sheet to push the valve core of the four-way two-position reversing valve to move leftwards; when the adjustable direct-acting overflow valve is closed, the throttle sheet has no pressure difference, and the compression spring pushes the four-way two-position reversing valve core to the right side.
4. A pressure controlled emergency valve according to claim 3, wherein the adjustable direct-acting overflow valve is a one-way pressure control valve, and is opened when the pressure provided by the main steering pump is greater than the set pressure, and is closed when the pressure provided by the main steering pump is less than the set pressure.
5. A pressure controlled emergency valve according to claim 4, wherein the adjustable direct relief valve comprises: the valve core of the adjustable direct-acting overflow valve, the pressure spring and the pressure adjusting device are connected, the first end of the pressure spring is connected with the valve core of the adjustable direct-acting overflow valve and tightly presses the valve core of the adjustable direct-acting overflow valve at the inlet position of the adjustable direct-acting overflow valve, the second end of the pressure spring is connected with the pressure adjusting device, and the pressure adjusting device can adjust the tightening state of the pressure spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022350856.5U CN213598645U (en) | 2020-10-21 | 2020-10-21 | Pressure control emergency valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022350856.5U CN213598645U (en) | 2020-10-21 | 2020-10-21 | Pressure control emergency valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213598645U true CN213598645U (en) | 2021-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022350856.5U Active CN213598645U (en) | 2020-10-21 | 2020-10-21 | Pressure control emergency valve |
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| Country | Link |
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| CN (1) | CN213598645U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115285217A (en) * | 2022-09-06 | 2022-11-04 | 一汽解放汽车有限公司 | Emergency steering power device of commercial vehicle and commercial vehicle |
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2020
- 2020-10-21 CN CN202022350856.5U patent/CN213598645U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115285217A (en) * | 2022-09-06 | 2022-11-04 | 一汽解放汽车有限公司 | Emergency steering power device of commercial vehicle and commercial vehicle |
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