CN219774475U - Manual variable control valve - Google Patents
Manual variable control valve Download PDFInfo
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- CN219774475U CN219774475U CN202320285490.9U CN202320285490U CN219774475U CN 219774475 U CN219774475 U CN 219774475U CN 202320285490 U CN202320285490 U CN 202320285490U CN 219774475 U CN219774475 U CN 219774475U
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- oil
- variable control
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- 230000007246 mechanism Effects 0.000 claims abstract description 28
- 238000009434 installation Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 102200042573 rs17116471 Human genes 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Mechanically-Actuated Valves (AREA)
Abstract
The utility model discloses a manual variable control valve, which comprises a valve body, a servo mechanism, a reset mechanism, a rear cover and an electromagnetic reversing valve, wherein the valve body is provided with a valve body; the servo mechanism is arranged on the valve body; the valve body is internally provided with a first oil port and a second oil port; the first oil port and the second oil port are communicated with an oil inlet of the valve body and are also respectively communicated with two sides of a variable cylinder of the variable closed pump; the reset mechanism is arranged inside the valve body; the rear cover is arranged on one side of the valve body; the electromagnetic reversing valve is arranged on the rear cover and is positioned on the same side with the boss of the reset mechanism; the electromagnetic reversing valve is provided with a first valve port and a second valve port; the first valve port is communicated with or cut off from an oil inlet of the valve body; the second valve port is communicated with or cut off from the oil return port of the valve body. According to the utility model, the electromagnetic reversing valve is arranged on the rear cover, and the electromagnetic reversing valve and the boss of the reset mechanism are positioned on the same side, so that the radial length of the whole manual variable control valve can be effectively shortened, and interference with other parts during installation is avoided.
Description
Technical Field
The utility model relates to the field of control valves, in particular to a manual variable control valve.
Background
The existing manual variable control valve with electromagnetic valve unloading is generally arranged on an A4VG or A10G variable closed pump and connected with a hydraulic motor to form a closed system, and is applied to engineering vehicles. The manual variable control valve can control the output flow and the direction of the variable closed pump, so as to control the forward or backward movement of the engineering vehicle. The electromagnetic valve for unloading can unload the manual variable control valve no matter what state the manual variable valve is in, so that the output flow of the variable closed pump becomes zero, and the emergency braking of the vehicle is realized.
As shown in fig. 1, in the existing manual variable valve with electromagnetic valve unloading, an electromagnetic valve for unloading is generally integrated on a valve body, bosses of an inserted electromagnetic valve for unloading and a resetting mechanism are distributed on two sides of the valve body, and the arrangement mode can enable the whole length of a control valve to be overlong, so that the manual variable valve is easy to interfere with a shell of a pump or other control valves.
Therefore, there is a need for a manual variable control valve to solve the above-described problems.
Disclosure of Invention
The utility model aims to provide a manual variable control valve, which shortens the length of the manual variable control valve and avoids interference with other parts during installation under the condition of ensuring the normal function of the manual variable control valve.
In order to solve the technical problems, the utility model provides a manual variable control valve, which comprises a valve body, a servo mechanism, a reset mechanism, a rear cover and an electromagnetic reversing valve;
the servo mechanism is arranged on the valve body and used for controlling the oil pressure of two sides of a variable cylinder of the variable closed pump;
the valve body is internally provided with a first oil port and a second oil port;
the first oil port and the second oil port are communicated with the oil inlet of the valve body and are also respectively communicated with two sides of a variable cylinder of the variable closed pump;
the reset mechanism is arranged inside the valve body;
the rear cover is arranged on one side of the valve body;
the electromagnetic reversing valve is arranged on the rear cover and is positioned on the same side with the boss of the reset mechanism;
the electromagnetic directional valve is provided with a first valve port and a second valve port;
the first valve port is communicated with or cut off from the oil inlet of the valve body;
the second valve port is communicated with or cut off from the oil return port of the valve body.
Further, when the first valve port is blocked with the valve body oil inlet, and the second valve port is blocked with the valve body oil return port, pressure oil introduced by the valve body oil inlet enters the servo mechanism, and the running of the vehicle is controlled through the pressure difference between the first oil port and the second oil port.
Further, when the first valve port is blocked from the oil inlet of the valve body, the second valve port is blocked from the oil return port of the valve body, and the pressure of the first oil port is equal to that of the second oil port, the vehicle is controlled to stop.
Further, when the first valve port is communicated with the valve body oil inlet and the second valve port is communicated with the valve body oil return port, pressure oil introduced by the valve body oil inlet enters the valve body oil return port to be unloaded, and emergency braking of the vehicle is controlled.
Further, the electromagnetic directional valve is inserted into the rear cover in a threaded manner, and an oil hole for communicating the first valve port and the second valve port is formed in the rear cover.
Furthermore, the electromagnetic directional valve controls communication or cut-off of the first valve port and the second valve port through an electromagnet.
Further, the electromagnetic directional valve is arranged as a two-position two-way directional valve.
Compared with the prior art, the utility model has at least the following beneficial effects:
the electromagnetic reversing valve is arranged on the rear cover, and the electromagnetic reversing valve and the boss of the reset mechanism are positioned on the same side, so that the radial length of the whole manual variable control valve can be effectively shortened, and interference with other parts during installation is avoided.
Drawings
FIG. 1 is a schematic diagram of a prior art manual variable control valve;
FIG. 2 is a schematic diagram of the structure of the manual variable control valve of the present utility model;
FIG. 3 is a cross-sectional view of a manual variable control valve of the present utility model;
FIG. 4 is a schematic view of the structure of FIG. 3 at A-A in accordance with the present utility model;
FIG. 5 is a schematic view of the structure of FIG. 3 at B-B in accordance with the present utility model;
FIG. 6 is a schematic view of the structure of FIG. 3 at C-C in accordance with the present utility model;
FIG. 7 is a schematic top cross-sectional view of the manual variable control valve of the present utility model;
fig. 8 is a schematic diagram of a manual variable control valve according to the present utility model.
Detailed Description
The manual variable control valve of the present utility model will be described in more detail below in conjunction with the schematic drawings, in which preferred embodiments of the present utility model are shown, it being understood that one skilled in the art can modify the utility model described herein while still achieving the advantageous effects of the utility model. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the utility model.
The utility model is more particularly described by way of example in the following paragraphs with reference to the drawings. Advantages and features of the utility model will become more apparent from the following description and from the claims. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model.
As shown in fig. 2 to 7, an embodiment of the present utility model proposes a manual variable control valve including a valve body 1, a servo mechanism, a reset mechanism, a rear cover 10, and an electromagnetic directional valve 11.
The servo mechanism is arranged on the valve body 1 and used for controlling the oil pressure of two sides of a variable cylinder of the variable closed pump.
Specifically, the servo mechanism comprises a valve sleeve 8, a feedback rod 2, a cover plate 9, a handle 5, a sealing element and a rotating shaft 7. This is the prior art, and the specific connection and positional relationship thereof are not described herein.
Wherein, a first oil port X1 and a second oil port X2 are arranged in the valve body 1.
The first oil port X1 and the second oil port X2 are communicated with an oil inlet of the valve body 1 and are also respectively communicated with two sides of a variable cylinder of the variable closed pump so as to apply oil pressure to the two sides of the variable cylinder.
In summary, the hydraulic pressure of the two sides of the variable cylinder leading to the variable closed pump is controlled by the handle 5, so that the displacement of the variable closed pump is controlled, and the forward and backward control of the engineering vehicle is completed.
The reset mechanism is arranged in the valve body 1, and specifically, the reset mechanism mainly comprises a spring 13, a spring seat 14, a plug 4, an eccentric screw 3, a limiting block 6 and a plug screw 12. This is the prior art, and the specific connection and positional relationship thereof are not described herein.
The rear cover 10 is arranged at one side of the valve body 1; the electromagnetic directional valve 11 is arranged on the rear cover 10 and is positioned on the same side as the boss of the reset mechanism. The electromagnetic directional valve 11 and the boss are arranged on the same side, so that the radial length of the whole manual variable control valve is effectively shortened, interference with other parts during installation is avoided, and the installation stability of the whole device is improved.
The electromagnetic directional valve 11 has a first valve port p and a second valve port a.
The first valve port p is communicated with or cut off from an oil inlet of the valve body 1; the second valve port a is communicated with or cut off from the oil return port T of the valve body 1.
In this embodiment, the operation of the engineering vehicle through the device mainly has the following three motion states, which are specifically shown as follows:
when the first valve port p is blocked from the oil inlet of the valve body 1 and the second valve port a is blocked from the oil return port T of the valve body 1, pressure oil introduced by the oil inlet of the valve body 1 enters the servo mechanism, and the running of the vehicle is controlled by the pressure difference between the first oil port X1 and the second oil port X2.
Specifically, the handle 5 is rotated to drive the rotating shaft 7 to rotate, so that the communication state of the oil inlet and the first oil port X1 and the second oil port X2 is changed, the pressure of the first oil port X1 and the pressure of the second oil port X2 are changed, the variable closed pump swash plate is driven to change the swing angle under the action of pressure difference, the output flow is accordingly output, and then the motor is driven to drive the tire or the crawler to rotate, so that the vehicle enters a running state.
When the first valve port p is blocked from the oil inlet of the valve body 1, the second valve port a is blocked from the oil return port T of the valve body 1, and the pressure of the first oil port X1 is equal to that of the second oil port X2, the vehicle is controlled to stop.
As shown in fig. 3 to 8, specifically, when in a running state, the pressure oil of the oil inlet is led to the first oil port X1 and the second oil port X2 through an oil passage formed by the rotating shaft 7 and the valve sleeve 8, and when in a zero state, the pressure of the first oil port X1 is equal to the pressure of the second oil port X2, the variable cylinder is in a middle position, and the output flow of the variable closed pump is basically zero, so that the vehicle is stopped.
And when the first valve port p is communicated with the oil inlet of the valve body 1 and the second valve port a is communicated with the oil return port T of the valve body 1, the pressure oil introduced by the oil inlet of the valve body 1 enters the oil return port of the valve body 1 to be unloaded, so that the emergency braking of the vehicle is controlled.
Specifically, when the first valve port p and the second valve port a are both in communication state, the pressure oil of the oil inlet is directly returned to the oil return port T of the valve body 1 through the electromagnetic directional valve 11, so as to release the pressure of the pressure oil. Similarly, the first oil port X1 and the second oil port X2 are also communicated with the oil return port T of the valve body 1 through the electromagnetic directional valve 11, the two sides of the variable cylinder of the variable closed pump have no pressure difference, the variable cylinder returns to the middle position under the reset action, the output flow of the variable closed pump becomes zero, the tire or the crawler driven by the motor stops rotating, and the vehicle stops.
The electromagnetic directional valve 11 is threadedly inserted into the rear cover 10, and an oil hole (not shown) for communicating the first valve port p and the second valve port a is provided in the rear cover 10.
As shown in fig. 8, the electromagnetic directional valve 11 controls communication or blocking of the first valve port p and the second valve port a by an electromagnet.
Specifically, when the electromagnet is not powered on, the first valve port p and the second valve port a are both in a cut-off state, and when the electromagnet is powered on, the first valve port p and the second valve port a are both in a communication state.
In this embodiment, a normally closed oil path communication manner is adopted, or a normally open oil path communication manner may be adopted to define the first valve port p and the second valve port a, which is not described herein.
Specifically, the electromagnetic directional valve 11 is a two-position two-way directional valve.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (7)
1. The manual variable control valve is characterized by comprising a valve body, a servo mechanism, a reset mechanism, a rear cover and an electromagnetic reversing valve;
the servo mechanism is arranged on the valve body and used for controlling the oil pressure of two sides of a variable cylinder of the variable closed pump;
the valve body is internally provided with a first oil port and a second oil port;
the first oil port and the second oil port are communicated with the oil inlet of the valve body and are also respectively communicated with two sides of a variable cylinder of the variable closed pump;
the reset mechanism is arranged inside the valve body;
the rear cover is arranged on one side of the valve body;
the electromagnetic reversing valve is arranged on the rear cover and is positioned on the same side with the boss of the reset mechanism;
the electromagnetic directional valve is provided with a first valve port and a second valve port;
the first valve port is communicated with or cut off from the oil inlet of the valve body;
the second valve port is communicated with or cut off from the oil return port of the valve body.
2. The manual variable control valve according to claim 1, wherein when the first valve port is closed to the valve body oil inlet and the second valve port is closed to the valve body oil return port, pressure oil introduced from the valve body oil inlet enters the servo mechanism, and the vehicle is controlled to travel by a pressure difference between the first oil port and the second oil port.
3. The manual variable control valve of claim 1, wherein vehicle is controlled to stop when a first port is blocked from the valve body oil inlet, and the second port is blocked from the valve body oil return, and the first port is at the same pressure as the second port.
4. The manual variable control valve of claim 1, wherein when the first port communicates with the valve body oil inlet and the second port communicates with the valve body oil return port, pressure oil introduced by the valve body oil inlet enters the valve body oil return port to be unloaded, thereby controlling emergency braking of the vehicle.
5. The manual variable control valve according to claim 1, wherein the electromagnetic directional valve is screw-inserted inside the rear cover, and an oil hole for communicating the first valve port and the second valve port is provided in the rear cover.
6. The manual variable control valve according to claim 1, wherein the electromagnetic directional valve controls communication or shutoff of the first valve port and the second valve port by an electromagnet.
7. The manual variable control valve according to claim 1, wherein the electromagnetic directional valve is provided as a two-position two-way directional valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320285490.9U CN219774475U (en) | 2023-02-22 | 2023-02-22 | Manual variable control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320285490.9U CN219774475U (en) | 2023-02-22 | 2023-02-22 | Manual variable control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219774475U true CN219774475U (en) | 2023-09-29 |
Family
ID=88137133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320285490.9U Active CN219774475U (en) | 2023-02-22 | 2023-02-22 | Manual variable control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219774475U (en) |
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2023
- 2023-02-22 CN CN202320285490.9U patent/CN219774475U/en active Active
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