CN220581668U - Gearbox control valve - Google Patents
Gearbox control valve Download PDFInfo
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- CN220581668U CN220581668U CN202322353262.3U CN202322353262U CN220581668U CN 220581668 U CN220581668 U CN 220581668U CN 202322353262 U CN202322353262 U CN 202322353262U CN 220581668 U CN220581668 U CN 220581668U
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- 239000003921 oil Substances 0.000 claims abstract description 276
- 239000002243 precursor Substances 0.000 claims abstract description 40
- 239000010729 system oil Substances 0.000 claims abstract description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000011161 development Methods 0.000 abstract description 8
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 230000010354 integration Effects 0.000 description 5
- 206010063385 Intellectualisation Diseases 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The utility model discloses a gearbox control valve, and belongs to the technical field of gearboxes; the hydraulic control device comprises an oil return port which is respectively connected with a second oil outlet of a precursor control unit, a hydraulic gear control unit, a reverse gear control unit, a second gear control unit and a first gear control unit; the hydraulic gear control unit, the reverse gear control unit, the second gear control unit and the first gear control unit are connected with a first oil outlet of the switch electromagnetic valve through oil ways; an oil inlet of the precursor control unit is connected with an oil inlet of the system through an oil way; an energy accumulator and a first pressure sensor are arranged on a first oil outlet oil path of the switch electromagnetic valve; the oil inlet of the switch electromagnetic valve is respectively connected with the safety overflow valve and the system oil inlet through oil ways. The utility model integrates the core hydraulic element, and can realize gear control of the gearbox, feedback of the working state and monitoring of the state of the hydraulic system; the operation efficiency is improved, and the automatic and intelligent development requirements are met.
Description
Technical Field
The utility model belongs to the technical field of gearboxes, and relates to a gearbox control valve.
Background
With the development of the land towards moderate scale and centralization, the mechanized operation has become the development direction of large-scale agricultural production. As an important agricultural machine product, the tractor has the characteristics of multiple purposes, flexibility, large traction force, high productivity and the like, and can replace different working devices to realize various operations such as cultivation, seeding, harvesting, transportation and the like.
The high-horsepower tractor stepless speed changing box has the advantages of high transmission efficiency, large speed ratio change range and continuously adjustable speed ratio, is widely applied, but the integration level of the existing speed changing box is not high, wiring harness arrangement is disordered, the later maintenance is not easy, the development trend of the existing automation, intellectualization and high integration level is difficult to be met, and the traditional multipath hydraulic output is developed from a manual reversing valve to a proportional valve direction. Therefore, development of a gearbox control valve assembly with high integration level and meeting the requirements of automation and intelligent development is needed.
Disclosure of Invention
The utility model aims to solve the technical problems that in the prior art, the integration level of a gearbox is low, wiring harness arrangement is disordered, and development requirements of intellectualization and automation are difficult to meet, and provides a gearbox control valve.
In order to achieve the purpose, the utility model is realized by adopting the following technical scheme:
the utility model discloses a gearbox control valve, which comprises an oil return port connected with a second oil outlet of a precursor control unit, a hydraulic gear control unit, a reverse gear control unit, a second gear control unit and a first gear control unit respectively; the oil inlets of the hydraulic gear control unit, the reverse gear control unit, the second gear control unit and the first gear control unit are connected with a first oil outlet of the switch electromagnetic valve through an oil way; an oil inlet of the precursor control unit is connected with an oil inlet of the system through an oil way; an energy accumulator and a first pressure sensor are arranged on a first oil outlet oil path of the switch electromagnetic valve; the oil inlet of the switch electromagnetic valve is respectively connected with the safety overflow valve and the system oil inlet through oil ways; the second oil outlet of the switch electromagnetic valve is connected with the oil return port of the switch electromagnetic valve through an oil way.
Further, the precursor control unit comprises a precursor proportional solenoid valve and a precursor clutch oil port; the first oil outlet of the precursor proportional solenoid valve is connected with the oil port of the precursor clutch through an oil way; the second oil outlet of the precursor proportional solenoid valve is connected with an oil return port through an oil way; an oil inlet of the precursor proportional solenoid valve is connected with an oil inlet of the system through an oil way; and a second pressure sensor is arranged on an oil path between the precursor proportional solenoid valve and the precursor clutch oil port.
Further, the hydraulic gear control unit comprises a hydraulic gear proportional solenoid valve and a hydraulic gear brake oil port; the first oil outlet of the hydraulic gear proportional solenoid valve is connected with an oil port of the hydraulic gear brake through an oil way; the second oil outlet of the hydraulic gear proportional solenoid valve is connected with an oil return port through an oil way; an oil inlet of the hydraulic gear proportional solenoid valve is connected with a first oil outlet of the switch solenoid valve through an oil way; and a third pressure sensor is arranged on an oil way between the hydraulic gear proportional electromagnetic valve and the hydraulic gear brake oil port.
Further, the reverse gear control unit comprises a reverse gear proportional electromagnetic valve and a reverse gear clutch oil port; the first oil outlet of the reverse gear proportional solenoid valve is connected with the oil port of the reverse gear clutch through an oil way; the second oil outlet of the reverse gear proportional electromagnetic valve is connected with an oil return port through an oil way; an oil inlet of the reverse gear proportional solenoid valve is connected with a first oil outlet of the switch solenoid valve through an oil way; and a fourth pressure sensor is arranged on an oil path between the reverse gear proportional electromagnetic valve and the oil port of the reverse gear clutch.
Further, the second gear control unit comprises a second gear proportional electromagnetic valve and a second gear clutch oil port; the first oil outlet of the second-gear proportional electromagnetic valve is connected with the oil port of the second-gear clutch through an oil way; the second oil outlet of the second-gear proportional electromagnetic valve is connected with an oil return port through an oil way; an oil inlet of the second-gear proportional electromagnetic valve is connected with a first oil outlet of the switch electromagnetic valve through an oil way; and a fifth pressure sensor is arranged on an oil path between the second-gear proportional electromagnetic valve and the oil port of the second-gear clutch.
Further, the first gear control unit comprises a first gear proportional electromagnetic valve and a first gear clutch oil port; the first oil outlet of the first-gear proportional electromagnetic valve is connected with the first-gear clutch oil port through an oil way; the second oil outlet of the first-gear proportional electromagnetic valve is connected with the oil return port through an oil way; an oil inlet of the first-gear proportional electromagnetic valve is connected with a first oil outlet of the switch electromagnetic valve through an oil way; and a sixth pressure sensor is arranged on an oil path between the first-gear proportional electromagnetic valve and the first-gear clutch oil port.
Further, a temperature sensor is further arranged on the first oil outlet oil path of the switch electromagnetic valve.
Further, the inlet of the safety overflow valve is respectively connected with the overflow oil port and the small overflow oil port.
Compared with the prior art, the utility model has the following beneficial effects:
the utility model discloses a gearbox control valve which integrates a precursor control unit, a hydraulic gear control unit, a reverse gear control unit, a second gear control unit, a first gear control unit, a switching electromagnetic valve, a safety overflow valve, an energy accumulator and other core hydraulic elements; the monitoring of the working state of the gear function can be realized by arranging the pressure sensor on the oil path of each control unit; when the other four proportional solenoid valves except the precursor proportional solenoid valve are directly opened or closed, impact pressure generated in the hydraulic system can be absorbed by the energy accumulator, so that the peak value of hydraulic impact is reduced, and the temperature of oil in the oil way of the whole hydraulic system can be monitored by arranging a temperature sensor; in the aspect of functions, gear control of a gearbox, feedback of working states and monitoring of states of a hydraulic system can be realized, the operation efficiency is improved, and the requirements of automatic and intelligent development are met.
Furthermore, the first oil outlet oil path of the on-off electromagnetic valve is also provided with the first pressure sensor, so that the working states of the on-off electromagnetic valve and the safety overflow valve can be monitored, and the safety of the system is ensured.
Drawings
For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the present utility model;
fig. 2 is a schematic external view of the present utility model.
Wherein: 1-an oil return port; 2-an overflow oil port; 3-a small overflow oil port; 4-a safety overflow valve; 5-a system oil inlet; 6-switching an oil return port of the electromagnetic valve; 7-switching a solenoid valve; 8-an accumulator; 9-a first pressure sensor; 10-a temperature sensor; 11-a precursor proportional solenoid valve; 12-a second pressure sensor; 13-a precursor clutch oil port; 14-a hydraulic gear proportional solenoid valve; 15-a third pressure sensor; 16-hydraulic brake oil port; 17-a reverse proportional solenoid valve; 18-a fourth pressure sensor; 19-a reverse clutch oil port; 20-a second-gear proportional solenoid valve; 21-a fifth pressure sensor; 22-second gear clutch oil port; 23-a first-gear proportional solenoid valve; 24-sixth pressure sensor; 25-a first gear clutch oil port; 26-valve block.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the embodiments of the present utility model, it should be noted that, if the terms "upper," "lower," "horizontal," "inner," and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, or the azimuth or the positional relationship in which the inventive product is conventionally put in use, it is merely for convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
Furthermore, the term "horizontal" if present does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
The utility model is described in further detail below with reference to the attached drawing figures:
referring to fig. 1 and 2, the embodiment of the utility model discloses a gearbox control valve, which comprises an oil return port 1 respectively connected with a second oil outlet of a precursor control unit, a hydraulic gear control unit, a reverse gear control unit, a second gear control unit and a first gear control unit; the oil inlets of the hydraulic gear control unit, the reverse gear control unit, the second gear control unit and the first gear control unit are connected with a first oil outlet of the switch electromagnetic valve 7 through an oil way; an oil inlet of the precursor control unit is connected with an oil inlet 5 of the system through an oil way; an accumulator 8 and a first pressure sensor 9 are arranged on a first oil outlet oil path of the switch electromagnetic valve 7; the oil inlet of the switching electromagnetic valve 7 is respectively connected with the safety overflow valve 4 and the system oil inlet 5 through oil ways; the second oil outlet of the switch electromagnetic valve 7 is connected with the switch electromagnetic valve oil return port 6 through an oil way. From the aspect of integration, the on-off solenoid valve 7, the safety relief valve 4, the first pressure sensor 9, the energy accumulator 8 and other core hydraulic elements are integrated, and from the aspect of functionality, the control valve assembly can realize gear control of the gearbox, feedback of working state and monitoring of hydraulic system state. When the gearbox works, firstly, the switch electromagnetic valve 7 is opened, after the switch electromagnetic valve 7 is opened, the first pressure sensor 9 works, if the first pressure sensor 9 has the indication and the indication is normal, the safety relief valve 4 is indicated to be normal in pressure regulation, the switch electromagnetic valve 7 works normally, and otherwise, the safety relief valve 4 or the switch electromagnetic valve 7 is indicated to be faulty. The safety of the system is ensured.
In the present embodiment, the precursor control unit includes a precursor proportional solenoid valve 11 and a precursor clutch oil port 13; the first oil outlet of the precursor proportional solenoid valve 11 is connected with the precursor clutch oil port 13 through an oil way; the second oil outlet of the precursor proportional solenoid valve 11 is connected with the oil return port 1 through an oil way; an oil inlet of the precursor proportional solenoid valve 11 is connected with the system oil inlet 5 through an oil way; a second pressure sensor 12 is arranged on an oil path between the precursor proportional solenoid valve 11 and the precursor clutch oil port 13.
In the present embodiment, the hydraulic-gear control unit includes a hydraulic-gear proportional solenoid valve 14 and a hydraulic-gear brake port 16; the first oil outlet of the hydraulic gear proportional solenoid valve 14 is connected with a hydraulic gear brake oil port 16 through an oil way; the second oil outlet of the hydraulic gear proportional solenoid valve 14 is connected with the oil return port 1 through an oil way; an oil inlet of the hydraulic gear proportional solenoid valve 14 is connected with a first oil outlet of the switch solenoid valve 7 through an oil way; a third pressure sensor 15 is provided in an oil passage between the hydraulic brake proportional solenoid valve 14 and the hydraulic brake port 16.
In the present embodiment, the reverse gear control unit includes a reverse gear proportional solenoid valve 17 and a reverse gear clutch oil port 19; the first oil outlet of the reverse proportional solenoid valve 17 is connected with a reverse clutch oil port 19 through an oil way; the second oil outlet of the reverse gear proportional solenoid valve 17 is connected with the oil return port 1 through an oil way; an oil inlet of the reverse gear proportional solenoid valve 17 is connected with a first oil outlet of the switch solenoid valve 7 through an oil way; a fourth pressure sensor 18 is provided in an oil passage between the reverse proportional solenoid valve 17 and the reverse clutch oil port 19.
In the present embodiment, the second gear control unit includes a second gear proportional solenoid valve 20 and a second gear clutch oil port 22; the first oil outlet of the second-gear proportional solenoid valve 20 is connected with a second-gear clutch oil port 22 through an oil way; the second oil outlet of the second-gear proportional electromagnetic valve 20 is connected with the oil return port 1 through an oil way; the oil inlet of the second gear proportional electromagnetic valve 20 is connected with a first oil outlet of the switch electromagnetic valve 7 through an oil way; a fifth pressure sensor 21 is provided in an oil passage between the second-gear proportional solenoid valve 20 and the second-gear clutch oil port 22.
In the present embodiment, the first gear control unit includes a first gear proportional solenoid valve 23 and a first gear clutch oil port 25; the first oil outlet of the first-gear proportional solenoid valve 23 is connected with a first-gear clutch oil port 25 through an oil way; the second oil outlet of the first-gear proportional solenoid valve 23 is connected with the oil return port 1 through an oil way; an oil inlet of the first gear proportional solenoid valve 23 is connected with a first oil outlet of the switch solenoid valve 7 through an oil way; a sixth pressure sensor 24 is provided in the oil passage between the first-gear proportional solenoid valve 23 and the first-gear clutch oil port 25.
In this embodiment, a temperature sensor 10 is further disposed on the first oil outlet of the on-off solenoid valve 7. And the inlet of the safety overflow valve 4 is respectively connected with the overflow oil port 2 and the small overflow oil port 3. The overflow oil port 2 overflows to an oil pump oil suction port, and the small overflow oil port 3 overflows to an oil tank.
The working principle of the utility model is as follows:
the assembly of the utility model is provided with a system oil inlet 5 and four oil return ports, wherein the oil return port 1 is an oil return port shared by 5 proportional electromagnetic valves, the oil return port 1 directly returns to an oil tank, the overflow port 2 and the small overflow port 3 are both overflow ports of a safety overflow valve 4, the safety overflow valve with two overflow ports is determined by a special structure, the overflow port 2 overflows to an oil pump oil suction port, the small overflow port 3 overflows to the oil tank, and the oil return port 6 of the switch electromagnetic valve directly returns to the oil tank. The main function of the safety relief valve 4 is to limit the pressure of the hydraulic system not to exceed the set pressure value of the system, and the working state of the safety relief valve is monitored by the first pressure sensor 9, if the on-off electromagnetic valve 7 is opened, the pressure at the first pressure sensor 9 is the system pressure value after the work adjustment of the safety relief valve 4. The switch electromagnetic valve 7 is a switch of the hydraulic control system, the working state of the switch electromagnetic valve is also fed back by the first pressure sensor 9, when the switch electromagnetic valve 7 is opened, the first pressure sensor 9 can monitor the system pressure, and when the switch electromagnetic valve 7 is closed, the first pressure sensor 9 has no pressure. Five proportional solenoid valves are arranged on the control valve assembly and are gear control valves, and pressure sensors are arranged on oil passages of the first oil outlets and are responsible for monitoring working states of gear functions. The control valve assembly is also provided with an accumulator 8 and a temperature sensor 10, when the other four proportional solenoid valves except the precursor proportional solenoid valve 11 are directly opened or closed, impact pressure generated in the hydraulic system is absorbed by the accumulator 8, so that the peak value of hydraulic impact is reduced, the temperature sensor 10 monitors the oil temperature in the oil way of the whole hydraulic system, and the working premise of the accumulator 8 and the temperature sensor 10 is that the switch solenoid valve 7 is opened. When the gearbox works, firstly, the switch electromagnetic valve 7 is opened, after the switch electromagnetic valve 7 is opened, the first pressure sensor 9 works, if the first pressure sensor 9 has the indication and the indication is normal, the safety relief valve 4 is indicated to be normal in pressure regulation, the switch electromagnetic valve 7 works normally, and otherwise, the safety relief valve 4 or the switch electromagnetic valve 7 is indicated to be faulty. On the premise of opening the switch electromagnetic valve 7, when the gearbox needs to work in a certain gear, taking a first gear as an example, current is firstly input to the first gear proportional electromagnetic valve 23, then pressure is arranged at the pressure sensor 24 and the pressure indication is normal, so that the first gear proportional electromagnetic valve 23 works normally, pressure oil outputs pressure to the first gear clutch piston cavity through the first gear clutch oil port 25, so that the input shaft rotating speed and the gear rotating speed are synchronous, the gearbox starts to work in a first gear, when the first gear is not needed, the current of the first gear proportional electromagnetic valve 23 is removed, the first gear clutch piston cavity and the first gear piston cavity are communicated with the oil return port 1, the oil returns and is decompressed, the clutch does not transmit torque any more, and the first gear does not work. The other four gears are just different in the electrified proportional solenoid valves, and the working modes are the same.
The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (8)
1. The gearbox control valve is characterized by comprising an oil return port (1) which is respectively connected with a second oil outlet of a precursor control unit, a hydraulic gear control unit, a reverse gear control unit, a second gear control unit and a first gear control unit; the oil inlets of the hydraulic gear control unit, the reverse gear control unit, the second gear control unit and the first gear control unit are connected with a first oil outlet of a switch electromagnetic valve (7) through an oil way; an oil inlet of the precursor control unit is connected with an oil inlet (5) of the system through an oil way; an energy accumulator (8) and a first pressure sensor (9) are arranged on a first oil outlet oil path of the switch electromagnetic valve (7); an oil inlet of the switching electromagnetic valve (7) is respectively connected with the safety overflow valve (4) and the system oil inlet (5) through oil ways; the second oil outlet of the switch electromagnetic valve (7) is connected with an oil return port (6) of the switch electromagnetic valve through an oil way.
2. The gearbox control valve according to claim 1, characterized in that the precursor control unit comprises a precursor proportional solenoid valve (11) and a precursor clutch port (13); the first oil outlet of the precursor proportional solenoid valve (11) is connected with the precursor clutch oil port (13) through an oil way; the second oil outlet of the precursor proportional solenoid valve (11) is connected with the oil return port (1) through an oil way; an oil inlet of the precursor proportional solenoid valve (11) is connected with an oil inlet (5) of the system through an oil way; a second pressure sensor (12) is arranged on an oil path between the precursor proportional solenoid valve (11) and the precursor clutch oil port (13).
3. A transmission control valve according to claim 1 or 2, characterized in that the hydraulic block control unit comprises a hydraulic block proportional solenoid valve (14) and a hydraulic block brake port (16); the first oil outlet of the hydraulic gear proportional solenoid valve (14) is connected with a hydraulic gear brake oil port (16) through an oil way; the second oil outlet of the hydraulic gear proportional solenoid valve (14) is connected with the oil return port (1) through an oil way; an oil inlet of the hydraulic gear proportional solenoid valve (14) is connected with a first oil outlet of the switch solenoid valve (7) through an oil way; a third pressure sensor (15) is arranged on an oil path between the hydraulic gear proportional solenoid valve (14) and the hydraulic gear brake oil port (16).
4. A transmission control valve according to claim 3, characterized in that the reverse gear control unit comprises a reverse proportional solenoid valve (17) and a reverse clutch oil port (19); a first oil outlet of the reverse proportional solenoid valve (17) is connected with a reverse clutch oil port (19) through an oil way; the second oil outlet of the reverse gear proportional electromagnetic valve (17) is connected with the oil return port (1) through an oil way; an oil inlet of the reverse gear proportional solenoid valve (17) is connected with a first oil outlet of the switch solenoid valve (7) through an oil way; a fourth pressure sensor (18) is arranged on an oil path between the reverse gear proportional solenoid valve (17) and the reverse gear clutch oil port (19).
5. The transmission control valve according to claim 4, wherein the second-gear control unit includes a second-gear proportional solenoid valve (20) and a second-gear clutch oil port (22); the first oil outlet of the second-gear proportional electromagnetic valve (20) is connected with a second-gear clutch oil port (22) through an oil way; the second oil outlet of the second-gear proportional electromagnetic valve (20) is connected with the oil return port (1) through an oil way; an oil inlet of the second gear proportional electromagnetic valve (20) is connected with a first oil outlet of the switch electromagnetic valve (7) through an oil way; a fifth pressure sensor (21) is arranged on an oil path between the second-gear proportional solenoid valve (20) and the second-gear clutch oil port (22).
6. A transmission control valve according to claim 5, characterized in that the first gear control unit comprises a first gear proportional solenoid valve (23) and a first gear clutch oil port (25); the first oil outlet of the first-gear proportional electromagnetic valve (23) is connected with the first-gear clutch oil port (25) through an oil way; the second oil outlet of the first-gear proportional electromagnetic valve (23) is connected with the oil return port (1) through an oil way; an oil inlet of the first-gear proportional electromagnetic valve (23) is connected with a first oil outlet of the switch electromagnetic valve (7) through an oil way; a sixth pressure sensor (24) is arranged on an oil path between the first-gear proportional solenoid valve (23) and the first-gear clutch oil port (25).
7. A gearbox control valve according to claim 6, characterised in that the first outlet oil circuit of the on-off solenoid valve (7) is further provided with a temperature sensor (10).
8. The gearbox control valve according to claim 7, characterized in that the inlet of the safety relief valve (4) is connected to the relief port (2) and the small relief port (3), respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322353262.3U CN220581668U (en) | 2023-08-30 | 2023-08-30 | Gearbox control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322353262.3U CN220581668U (en) | 2023-08-30 | 2023-08-30 | Gearbox control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220581668U true CN220581668U (en) | 2024-03-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322353262.3U Active CN220581668U (en) | 2023-08-30 | 2023-08-30 | Gearbox control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220581668U (en) |
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2023
- 2023-08-30 CN CN202322353262.3U patent/CN220581668U/en active Active
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