CN219529428U - High-low speed electric control switching valve group for walking motor - Google Patents
High-low speed electric control switching valve group for walking motor Download PDFInfo
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- CN219529428U CN219529428U CN202320571060.3U CN202320571060U CN219529428U CN 219529428 U CN219529428 U CN 219529428U CN 202320571060 U CN202320571060 U CN 202320571060U CN 219529428 U CN219529428 U CN 219529428U
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Abstract
The utility model relates to the technical field of hydraulic valve groups, and provides a high-low speed electric control switching valve group for a traveling motor, which comprises an integrated valve body, and a flow distribution and collection valve, a reversing slide valve and an electromagnetic switching valve which are arranged on the integrated valve body; the oil port A is connected with a flow distributing and collecting valve, and the flow distributing and collecting valve is respectively connected with an oil port A1 and an oil port A2; the oil port A1 is connected with a first oil port of the first motor, and the oil port B1 is connected with a second oil port of the first motor; the oil port A2 is connected with the first oil port of the second motor, and the oil port B2 is connected with the second oil port of the second motor; the oil port B1 and the oil port B2 are respectively connected with an oil duct of the reversing slide valve; the oil duct of the reversing slide valve is connected with the oil port B; the L oil port is connected with an oil duct of the reversing slide valve, and an electromagnetic switching valve is arranged in a connecting pipeline of the L oil port and the reversing slide valve. The utility model can integrate the functions of electric control switching, hydraulic control switching and shunt control together, realizes high integration and is convenient for pipeline connection.
Description
Technical Field
The utility model relates to the technical field of hydraulic valve groups, in particular to a high-low speed electric control switching valve group for a traveling motor.
Background
In the current vehicle-mounted hydrostatic drive traveling system, a traveling motor adopts two or more quantitative hydraulic motors, traveling high-low speed switching is realized by adopting a mode of combining a plurality of control valves, and the structure has the defects that:
1. the number of control valves is increased, the pipeline connection is increased, the occupied installation space is large, and the maintenance difficulty is increased.
2. When the conventional control valve bank meets the requirement of a high-pressure high-flow system, the external structural dimension is large, the structure is not compact, and the control valve bank is not suitable for a vehicle-mounted hydraulic control system.
3. The conventional pressure maintaining test of the control valve group is carried out in the development test process, and when the delivery test of the product after shaping is carried out, the pressure maintaining test is not carried out any more, so that once the oil seepage of the valve core slightly occurs, the valve core is easy to ignore, and the product quality is influenced for a long time.
Disclosure of Invention
The utility model mainly solves the technical problems of increasing the number of control valves, increasing pipeline connection, occupying large installation space, increasing maintenance difficulty and the like caused by the mode that a plurality of control valves are combined in the high-low speed switching of the walking motor in the prior art, and provides the high-low speed electric control switching valve group for the walking motor, which integrates the electric control switching, hydraulic control switching and shunt control functions together so as to realize high integration and facilitate pipeline connection.
The utility model provides a high-low speed electric control switching valve group for a walking motor, which comprises the following components: the integrated valve body is provided with a flow distribution and collection valve, a reversing slide valve and an electromagnetic switching valve;
the integrated valve body is provided with an L oil port, an A oil port, a B oil port, an A1 oil port, a B1 oil port, an A2 oil port and a B2 oil port;
the A oil port is connected with a flow dividing and collecting valve, and the flow dividing and collecting valve is respectively connected with an A1 oil port and an A2 oil port;
the A1 oil port is connected with a first oil port of the first motor, and the B1 oil port is connected with a second oil port of the first motor;
the A2 oil port is connected with a first oil port of the second motor, and the B2 oil port is connected with a second oil port of the second motor;
the oil port B1 and the oil port B2 are respectively connected with an oil duct of the reversing slide valve;
the oil duct of the reversing slide valve is connected with the oil port B;
the L oil port is connected with an oil duct of the reversing slide valve, and an electromagnetic switching valve is arranged in a connecting pipeline of the L oil port and the reversing slide valve.
Preferably, the reversing slide valve includes: the slide valve comprises a slide valve core, a plug, a spring and a spring base;
the spool valve core of the spool valve is arranged in an oil duct of the reversing spool valve;
one end of an oil duct of the reversing slide valve is provided with a plug, and the other end of the oil duct is provided with a spring installed through a spring base.
Preferably, the oil port A is connected with a first oil port of the closed pump, and the oil port B is connected with a second oil port of the closed pump.
Preferably, the L oil port is connected with a pressure port of an oil supplementing pump of the closed pump.
Preferably, an MA oil port, an MB oil port, an MA1 oil port and an MA2 oil port are arranged on the integrated valve body;
the MA oil port is communicated with the A oil port and is a pressure measuring port of the A oil port;
the MB oil port is communicated with the B oil port and is a pressure measuring port of the B oil port;
the MA1 oil port is communicated with the A1 oil port and is a pressure measuring port of the A1 oil port;
and the MA2 oil port is communicated with the A2 oil port and is a pressure measuring port of the A2 oil port.
Preferably, the electromagnetic switching valve adopts a plug-in type electromagnetic valve.
Compared with the prior art, the high-low speed electric control switching valve group for the walking motor has the following advantages:
1. the electromagnetic switching valve for electric control switching, the reversing slide valve for hydraulic control switching and the flow distributing and collecting valve are integrated together, so that high integration is realized, and the pipeline connection is convenient. Compact structure, occupation installation space is less, reduces the maintenance degree of difficulty. The system can also meet the requirements of high-pressure and high-flow systems, has smaller overall structural dimension and can be suitable for vehicle-mounted hydraulic control systems.
2. The combination design of the electromagnetic switching valve and the reversing slide valve of the cartridge valve core is adopted, so that the appearance is smaller and more compact, and the installation space is reduced; the electromagnetic switching valve lock pin is replaced, so that the function change of the control oil circuit can be realized, the two modes of low-speed running without electricity or high-speed running without electricity can be switched, and the control oil circuit can be flexibly selected according to the requirements of users.
3. The valve group provided by the utility model is provided with a plurality of pressure measuring ports, so that pressure test can be performed during use, and the product quality of the valve group during use is ensured.
4. The highest working pressure of the valve bank can reach 30MPa, and the valve bank can be applied to a high-pressure walking hydraulic working system; and each control valve leaves the factory to perform a pressure maintaining test, so that the high-pressure sealing performance of each control valve leaves the factory is ensured, and the quality is more reliable.
Drawings
FIG. 1 is a schematic diagram of a high-low speed electric control switching valve set for a traveling motor;
fig. 2 is a hydraulic schematic diagram of the high-low speed electric control switching valve group for the walking motor.
Reference numerals: 1. an integrated valve body; 2. a flow dividing and collecting valve; 3. a reversing slide valve; 4. a plug; 5. a spring; 6. a spring base; 7. an electromagnetic switching valve; 8. a hydraulic control cavity.
Detailed Description
In order to make the technical problems solved by the utility model, the technical scheme adopted and the technical effects achieved clearer, the utility model is further described in detail below with reference to the accompanying drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the matters related to the present utility model are shown in the accompanying drawings.
As shown in fig. 1-2, the high-low speed electric control switching valve set for a walking motor provided by the embodiment of the utility model includes: the valve comprises an integrated valve body 1, a flow distributing and collecting valve 2, a reversing slide valve 3 and an electromagnetic switching valve 7 which are arranged on the integrated valve body 1.
The integrated valve body 1 is provided with an L oil port, an A oil port, a B oil port, an A1 oil port, a B1 oil port, an A2 oil port and a B2 oil port. The integrated valve body 1 is made of 45# steel forgings and can bear 35MPa rated working pressure.
The A oil port is connected with the flow dividing and collecting valve 2, and the flow dividing and collecting valve 2 is respectively connected with the A1 oil port and the A2 oil port. The flow dividing and collecting valve 2 plays a role in flow dividing and collecting, when the oil inlet of the oil port A is filled with oil, the flow is equally divided into the oil port A1 and the oil port A2 through the flow dividing and collecting valve 2, the forced flow dividing effect is achieved, and the flow dividing precision is high.
The A1 oil port is connected with a first oil port of the first motor, and the B1 oil port is connected with a second oil port of the first motor; the A2 oil port is connected with a first oil port of the second motor, and the B2 oil port is connected with a second oil port of the second motor.
The oil port B1 and the oil port B2 are respectively connected with an oil duct of the reversing slide valve 3; the oil duct of the reversing slide valve 3 is connected with the oil port B; the L oil port is connected with an oil duct of the reversing slide valve 3, and an electromagnetic switching valve 7 is arranged in a connecting pipeline of the L oil port and the reversing slide valve 3.
In this embodiment, the reversing slide valve 3 includes: the slide valve comprises a slide valve core, a plug 4, a spring 5 and a spring base 6; the spool valve core is arranged in an oil passage of the reversing spool valve 3, and the oil passage of the reversing spool valve 3 is used as a hydraulic control cavity 8; one end of an oil duct of the reversing slide valve 3 is provided with a plug 4, and the other end of the oil duct is provided with a spring 5 installed through a spring base 6. The plug 4 ensures an initial limit position of the spool of the slide valve. The spring 5 can enable the spool of the slide valve to reset rapidly after the pressure of the hydraulic control cavity 8 is released. The spring mount 6 ensures the guiding of the spring 5 and controls the maximum displacement of the spool valve.
The reversing slide valve 3 is used for reversing, and when control pressure enters an oil duct (a hydraulic control cavity 8) of the reversing slide valve 3, the control pressure acts on one end face of a slide valve core to push the slide valve core to move towards the other end against the force of the spring 5, so that the reversing slide valve 3 is switched to the left position and the right position. When the reversing slide valve 3 is not in the right position, if oil is fed from the oil port B, oil is discharged from the oil ports B1 and B2 simultaneously; if the oil is fed from the oil port A, the oil is discharged from the oil ports A1 and A2 simultaneously, and the flow is equally divided. When the reversing slide valve 3 is switched to be at the left position in a reversing way, if oil is fed from the oil port B, only oil is fed from the oil port B1; and if the oil is fed from the oil port A, the oil is only fed from the oil port A1.
The electromagnetic switching valve 7 adopts a plug-in type electromagnetic valve, and the electromagnetic valve core adopts a plug-in type electromagnetic valve to control the oil inlet of the hydraulic control cavity 8 and the pressure relief of the hydraulic control cavity 8. When the reversing slide valve 3 needs to be reversed, the electromagnetic switching valve 7 is powered on, and the L oil port control oil is switched through the electromagnetic switching valve 7 and enters the hydraulic control cavity 8; when the reversing slide valve 3 is reset, the electromagnetic switching valve 7 is powered off, the L oil port control oil is blocked, and the pressure oil of the hydraulic control cavity 8 is discharged back to the T oil port.
The oil port A is connected with a first oil port of the closed pump, and the oil port B is connected with a second oil port of the closed pump. One of the first oil port and the second oil port is used as an oil inlet and the other is used as an oil outlet. The L oil port is connected with a pressure port of an oil supplementing pump of the closed pump. The oil supplementing pump is integrated on the closed pump and belongs to a part of the closed pump.
Further, an MA oil port, an MB oil port, an MA1 oil port and an MA2 oil port are arranged on the integrated valve body 1; the MA oil port is communicated with the A oil port and is a pressure measuring port of the A oil port; the MB oil port is communicated with the B oil port and is a pressure measuring port of the B oil port; the MA1 oil port is communicated with the A1 oil port and is a pressure measuring port of the A1 oil port; and the MA2 oil port is communicated with the A2 oil port and is a pressure measuring port of the A2 oil port.
The utility model relates to a working principle of a high-low speed electric control switching valve group for a traveling motor, which comprises the following steps:
1. when the oil inlet A is filled with high-pressure oil and the oil outlet B is an oil outlet, the low-speed walking working mode is as follows: i.e. the first motor and the second motor are operated in parallel. When high-pressure oil of the closed pump enters the oil port A, the flow of the pressure oil is divided uniformly after passing through the flow dividing and collecting valve 2, one path of the pressure oil enters the oil port A1, and the other path of the pressure oil enters the oil port A2 through an oil passage of the reversing slide valve 3. The oil port A1 is connected with a first oil port of the first motor, and the first oil port of the first motor is used as an oil inlet; the A2 oil port is connected with the first oil port of the second motor, and the first oil port of the second motor is used as an oil inlet to realize synchronous rotation of the first motor and the second motor. Meanwhile, a second oil port of the first motor is connected with a B1 oil port, and the B1 oil port is used as an oil return port; the second oil port of the second motor is connected with the B2 oil port, and the B2 oil port is used as an oil return port; and the oil return of the oil port B1 passes through an oil passage of the reversing slide valve 3, is converged with the oil port B2, and flows out from the oil port B and returns to a second oil port (oil return port) of the closed pump. The parallel operation of the two traveling motors is realized, and a low-speed traveling mode is achieved.
2. When the oil inlet of the oil port A is high-pressure oil and the oil outlet of the oil port B is oil outlet, the high-speed walking working mode is as follows: i.e. the first motor and the second motor are operated in series. The electromagnetic switching valve 7 is electrified, and control oil of the L oil port enters the hydraulic control cavity 8 of the reversing slide valve 3 through an oil duct of the electromagnetic switching valve 7, so that the reversing slide valve 3 is reversed. When high-pressure oil enters the oil port A, the pressure oil flows out from the oil port A1, then enters the first oil port (oil inlet) of the first motor completely, flows out from the second oil port (oil outlet) of the first motor and enters the oil port B1; the hydraulic fluid enters the A2 oil port through the oil duct of the reversing slide valve 3, then enters the first oil port (oil inlet) of the second motor, flows out from the second oil port (oil outlet) of the second motor, enters the B2 oil port, finally flows back to the second oil port (oil return port) of the closed pump from the B oil port, realizes the serial connection work of the two traveling motors, and achieves a high-speed traveling mode.
3. When the oil inlet of the oil port B is filled with high-pressure oil, the oil outlet of the oil port A is used as an oil outlet, and the low-speed walking working mode is as follows: i.e. the first motor and the second motor are operated in parallel. The high-pressure oil enters an oil port B, the pressure oil respectively enters an oil port B1 and an oil port B2 through a valve block runner, the oil port B1 is connected with a second oil port of the first motor, and the second oil port of the first motor is used as an oil inlet; the oil port B2 is connected with a second oil port of the second motor, and at the moment, the second oil port of the second motor is used as an oil inlet to realize synchronous rotation of the first motor and the second motor; the first oil port of the first motor returns to the A1 oil port, the first oil port of the second motor returns to the A2 oil port, and the flow of the A1 oil port and the flow of the A2 oil port are equally divided through the flow dividing and collecting valve 2 and then collected and collected to the A port to flow out, and the flow returns to the first oil port (oil return port) of the closed pump. The flow realizes the parallel operation of the two traveling motors and achieves a low-speed traveling mode.
4. When the oil inlet of the oil port B is high-pressure oil, the oil outlet of the oil port A is an oil outlet, and the high-speed walking working mode is as follows: i.e. the first motor and the second motor are operated in series. The electromagnetic switching valve 7 is electrified, and control oil of the L oil port enters the hydraulic control cavity 8 of the reversing slide valve 3 through an oil duct of the electromagnetic switching valve 7, so that the reversing slide valve 3 is reversed. When high-pressure oil enters the B oil port, the pressure oil flows out from the B2 oil port, then all flows into the second oil port (oil inlet) of the second motor, flows out from the first oil port (oil outlet) of the second motor, enters the A2 oil port, enters the B1 oil port through the reversing slide valve 3 oil duct, then enters the second oil port (oil inlet) of the first motor, flows out from the first oil port (oil outlet) of the first motor, enters the A1 oil port, finally flows back to the first oil port (oil return port) of the closed pump from the A oil port, realizes the serial connection work of the two traveling motors, and reaches a high-speed traveling mode.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments is modified or some or all of the technical features are replaced equivalently, so that the essence of the corresponding technical scheme does not deviate from the scope of the technical scheme of the embodiments of the present utility model.
Claims (6)
1. The utility model provides a high low-speed automatically controlled change over valve group for walking motor which characterized in that includes: the valve comprises an integrated valve body (1), a flow distribution and collection valve (2), a reversing slide valve (3) and an electromagnetic switching valve (7), wherein the flow distribution and collection valve (2), the reversing slide valve (3) and the electromagnetic switching valve are arranged on the integrated valve body (1);
the integrated valve body (1) is provided with an L oil port, an A oil port, a B oil port, an A1 oil port, a B1 oil port, an A2 oil port and a B2 oil port;
the A oil port is connected with a flow dividing and collecting valve (2), and the flow dividing and collecting valve (2) is respectively connected with an A1 oil port and an A2 oil port;
the A1 oil port is connected with a first oil port of the first motor, and the B1 oil port is connected with a second oil port of the first motor;
the A2 oil port is connected with a first oil port of the second motor, and the B2 oil port is connected with a second oil port of the second motor;
the oil port B1 and the oil port B2 are respectively connected with an oil duct of the reversing slide valve (3);
the oil duct of the reversing slide valve (3) is connected with the oil port B;
the L oil port is connected with an oil duct of the reversing slide valve (3), and an electromagnetic switching valve (7) is arranged in a connecting pipeline of the L oil port and the reversing slide valve (3).
2. The high-low speed electrically controlled switching valve group for a traveling motor according to claim 1, characterized in that the reversing spool (3) includes: the sliding valve comprises a sliding valve core, a plug (4), a spring (5) and a spring base (6);
the spool valve core is arranged in an oil duct of the reversing spool valve (3);
one end of an oil duct of the reversing slide valve (3) is provided with a plug (4), and the other end is provided with a spring (5) installed through a spring base (6).
3. The high-low speed electronic control switching valve set for a traveling motor according to claim 1 or 2, wherein the a oil port is connected with a first oil port of a closed pump, and the B oil port is connected with a second oil port of the closed pump.
4. The high-low speed electrically controlled switching valve set for a traveling motor according to claim 3, wherein the L-port is connected to a pressure port of an oil compensating pump of the closed pump.
5. The high-low speed electric control switching valve group for the walking motor according to claim 1 or 2, wherein an MA oil port, an MB oil port, an MA1 oil port and an MA2 oil port are arranged on the integrated valve body (1);
the MA oil port is communicated with the A oil port and is a pressure measuring port of the A oil port;
the MB oil port is communicated with the B oil port and is a pressure measuring port of the B oil port;
the MA1 oil port is communicated with the A1 oil port and is a pressure measuring port of the A1 oil port;
and the MA2 oil port is communicated with the A2 oil port and is a pressure measuring port of the A2 oil port.
6. The high-low speed electrically controlled switching valve group for a traveling motor according to claim 1 or 2, wherein the electromagnetic switching valve (7) is a cartridge type electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320571060.3U CN219529428U (en) | 2023-03-22 | 2023-03-22 | High-low speed electric control switching valve group for walking motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320571060.3U CN219529428U (en) | 2023-03-22 | 2023-03-22 | High-low speed electric control switching valve group for walking motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219529428U true CN219529428U (en) | 2023-08-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320571060.3U Active CN219529428U (en) | 2023-03-22 | 2023-03-22 | High-low speed electric control switching valve group for walking motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219529428U (en) |
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2023
- 2023-03-22 CN CN202320571060.3U patent/CN219529428U/en active Active
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