CN214118616U - Unmanned tractor quick change multiple unit valve - Google Patents

Abstract

The utility model relates to an unmanned tractor quick change multiple unit valve, extend interface (6) and a plurality of quick-witted union piece (7) including installing support (1), two three-way valve (2), tribit cross valves (3), valve body (4), first expansion interface (5), second, valve body (4) are the hexahedron, installing support (1) set up in valve body (4) side surface, two three-way valve (2) with tribit cross valves (3) set up in valve body (4) upper end, first expansion interface (5) with interface (6) are extended to the second set up in valve body (4) front end, valve body (4) with installing support (1) is connected the side opposite face and is set up quick-operation piece (7). The utility model discloses an above-mentioned structure, the realization need not dismantle former car, and can form a holistic product, is independent of outside the whole vehicle system.

Description

Unmanned tractor quick change multiple unit valve

Technical Field

The utility model relates to a fluid work system field especially relates to an unmanned tractor multiple unit valve.

Background

With the improvement of the scientific and technological level of China, the automation level of the tractor is also improved year by year. Meanwhile, compared with other farming modes such as manpower, animal power and the like, the tractor has sufficient power and extremely high efficiency, and therefore, the tractor becomes the main power for production and working in China. In recent years, in order to further free up the labor, the unmanned technique of tractors has been rapidly developed. Currently, the unmanned technology of tractors is mainly focused on the vehicle body, and the rear farm tool part is less researched. However, in the actual cultivation process, the tractor and the farm tool work integrally, so that the actual cultivation process can be realized. The electric control of the matching of the tractor and the farm tool is urgent, and the hydraulic power output is more important.

The unmanned function of small tractors is small, so that the unmanned operation of large tractors is the focus of current research. For a large tractor, a hydraulic system of the large tractor can be roughly divided into three paths, one path is used for a hydraulic power steering system, the other path is used for lubrication and cooling of a gearbox, and the last path is a hydraulic oil path specially matched with farm tools. The oil circuit can be divided into two parts, one part is used for providing power for lifting the farm tool, the other part is used for outputting hydraulic power, the former is realized by a hydraulic cylinder, and the latter is realized by a multi-way valve. Currently, most of the multi-way valves installed on tractors are manual multi-way valves. In order to enable the unmanned system to operate on the tractor, the manual multi-way valve needs to be electrically controlled.

In order to solve the problem, an expansion scheme aiming at the manual multi-way valve of the stock tractor is needed so as to realize the electric control of the stock tractor. The realization need not dismantle original car, and can form an holistic product, be independent of outside the whole vehicle system.

Disclosure of Invention

The utility model relates to a solve among the prior art manual multiple unit valve of former car installation and carry out holistic replacement, need cooperate with whole car factory, carry out holistic transformation, upgrading to whole car hydraulic system, can't be applied to the problem of stock tractor, provide an unmanned tractor quick change multiple unit valve, adopt mutually independent and the oil circuit that can amalgamate through manual and autopilot part, solved above-mentioned problem.

The utility model provides an unmanned tractor quick change multiple unit valve, including installing support, two three-way valve, tribit cross valves, valve body, first expansion interface, second expansion interface and a plurality of quick-witted union piece, the valve body is the hexahedron, and the installing support sets up in the valve body side surface, and two three-way valve and tribit cross valve group set up in the valve body upper end, and first expansion interface and second expansion interface set up in the valve body front end, and the valve body sets up quick-connection piece with installing support connection side opposite face.

The manual multi-way valve of the vehicle and the expansion multi-way valve are respectively used for manual control and automatic control, manual multi-way valve of the vehicle and the detachable connection of the expansion multi-way valve are adopted, manual and automatic switching of the expansion multi-way valve is realized through the control of the manual multi-way valve of the vehicle, the original vehicle is not required to be detached, and an integral product can be formed and is independent of the whole vehicle system.

The utility model relates to a quick-change multi-way valve for unmanned tractors, as a preferred mode, a valve body comprises a valve body, a quick connector oil intersection group, a valve oil intersection group, a first expansion interface oil intersection and a second expansion interface oil intersection, the valve body is a parallelepiped, the quick connector oil intersection group comprises a plurality of quick connector oil intersections, the valve oil intersection group comprises a plurality of valve oil intersections, the quick connector oil intersection is arranged on the side surface of the valve body opposite to the connecting surface of the valve body and a mounting bracket, the valve oil intersection group is arranged on the upper surface of the valve body, the quick connector oil intersection group and the valve oil intersection are mutually communicated in the valve body, the first expansion interface oil intersection and the second expansion interface are arranged on the front surface of the valve body, the first expansion interface oil intersection and the second expansion interface oil intersection are both communicated with the valve oil group, the first expansion interface oil intersection is connected with the first expansion interface, the second expansion interface oil intersection is connected with the second expansion interface, the quick connector oil port group is connected with a quick connector.

The utility model discloses a quick change multi-way valve of unmanned tractor, as preferred mode, the tribit four-way valve group includes first tribit four-way valve, second tribit four-way valve, third tribit four-way valve and fourth tribit four-way valve, and first tribit four-way valve, second tribit four-way valve, third tribit four-way valve and fourth tribit four-way valve set up in proper order along the long limit of valve body on the valve body upper surface and connect valve oil crossing group; the two-position three-way valve is connected with the valve oil port group.

The utility model discloses a quick change multi-way valve of unmanned tractor, as preferred mode, the quick connector oil crossing group includes first quick connector oil crossing group, second quick connector oil crossing group, third quick connector oil crossing group and fourth quick connector oil crossing group, first quick connector oil crossing group, second quick connector oil crossing group, third quick connector oil crossing group and fourth quick connector oil crossing group set gradually along the long side of the valve body side; the first express item oil port group comprises a first upper express item oil port and a first lower express item oil port, and the axis connecting line of the first upper express item oil port and the first lower express item oil port is parallel to the side broadside of the valve body; the second express item oil port group comprises a second upper express item oil port and a second lower express item oil port, and the axis connecting line of the second upper express item oil port and the second lower express item oil port is parallel to the side face broadside of the valve body; the third quick-connection oil port group comprises a third upper quick-connection oil port and a third lower quick-connection oil port, and the axis connecting line of the third upper quick-connection oil port and the third lower quick-connection oil port is parallel to the side face broadside of the valve body; the fourth express item oil port group comprises a fourth upper express item oil port and a fourth lower express item oil port, and the axis connecting line of the fourth upper express item oil port and the fourth lower express item oil port is parallel to the wide side of the valve body.

The utility model discloses a quick change multi-way valve for unmanned tractor, as the preferred mode, the valve oil crossing group includes two-position three-way valve oil crossing group and three-position four-way valve oil crossing group, and two-position three-way valve oil crossing group and three-position four-way valve oil crossing group are respectively arranged on the upper surface of the valve body; the three-position four-way valve oil port group comprises a first three-position four-way valve oil port group, a second three-position four-way valve oil port group, a third three-position four-way valve oil port group and a fourth three-position four-way valve oil port group, and the first three-position four-way valve oil port group, the second three-position four-way valve oil port group, the third three-position four-way valve oil port group and the fourth three-position four-way valve oil port group are sequentially arranged on the upper surface of the valve body; the first three-position four-way valve oil port group comprises a first three-position four-way valve first oil port, a first three-position four-way valve second oil port, a first three-position four-way valve third oil port and a first three-position four-way valve fourth oil port, and the first three-position four-way valve first oil port, the first three-position four-way valve second oil port, the first three-position four-way valve third oil port and the first three-position four-way valve fourth oil port are arranged on the upper surface of the valve body at the same longitudinal position of the first quick connector oil port group; the second three-position four-way valve oil port group comprises a second three-position four-way valve first oil port, a second three-position four-way valve second oil port, a second three-position four-way valve third oil port and a second three-position four-way valve fourth oil port, and the second three-position four-way valve first oil port, the second three-position four-way valve second oil port, the second three-position four-way valve third oil port and a second three-position four-way valve fourth oil path port are arranged on the upper surface of the valve body at the same longitudinal position of the second quick connector oil port group; the third three-position four-way valve oil port group comprises a third three-position four-way valve first oil port, a third three-position four-way valve second oil port, a third three-position four-way valve third oil port and a third three-position four-way valve fourth oil port, and the third three-position four-way valve first oil port, the third three-position four-way valve second oil port, the third three-position four-way valve third oil port and a third three-position four-way valve fourth oil path port are arranged on the upper surface of the valve body at the same longitudinal position of the third quick connector oil port group; the fourth three-position four-way valve oil port group comprises a fourth three-position four-way valve first oil port, a fourth three-position four-way valve second oil port, a fourth three-position four-way valve third oil port and a fourth three-position four-way valve fourth oil port, and the fourth three-position four-way valve first oil port, the fourth three-position four-way valve second oil port, the fourth three-position four-way valve third oil port and a fourth three-position four-way valve fourth oil path port are arranged on the upper surface of the valve body at the same longitudinal position of the fourth quick connector oil port group.

The utility model discloses an unmanned tractor quick change multiple unit valve, as preferred mode, two-position three way valve oil crossing group includes first two-position three way valve oil crossing, the two-position three way valve oil crossing of second third two-position three way valve oil crossing, and first two-position three way valve oil crossing, the two-position three way valve oil crossing of second and third two-position three way valve oil crossing all set up in valve body upper surface.

The utility model discloses a quick change multi-way valve for unmanned tractor, as the preferred mode, first expansion interface oil crossing communicates with first two-position three-way valve oil crossing, and second expansion interface oil crossing communicates with second two-position three-way valve oil crossing, first oil crossing of first three-position four-way valve, first oil crossing of second three-position four-way valve, first oil crossing of third three-position four-way valve, first oil crossing of fourth three-position four-way valve each other; a second oil path port of the first three-position four-way valve is communicated with a first upper quick connector oil path port, a second oil path port of the second three-position four-way valve is communicated with a second upper quick connector oil path port, a second oil path port of the third three-position four-way valve is communicated with a third upper quick connector oil path port, and a second oil path port of the fourth three-position four-way valve is communicated with a fourth upper quick connector oil path port; a third oil path port of the first three-position four-way valve is communicated with a first lower quick connector oil path, a third oil path port of the second three-position four-way valve is communicated with a second lower quick connector oil path, a third oil path port of the third three-position four-way valve is communicated with a third lower quick connector oil path, and a third oil path port of the fourth three-position four-way valve is communicated with a fourth lower quick connector oil path; the fourth oil port of the first three-position four-way valve, the fourth oil port of the second three-position four-way valve, the fourth oil port of the third three-position four-way valve, the fourth oil port of the fourth three-position four-way valve and the oil port of the third two-position three-way valve are communicated with each other.

The utility model discloses a quick change multi-way valve of unmanned tractor, as preferred mode, when two-position three-way valve is located first operating position, first two-position three-way valve oil crossing is connected with second two-position three-way valve oil crossing, when two-position three-way valve is located second operating position, first two-position three-way valve oil crossing is connected with third two-position three-way valve oil crossing;

when the first three-position four-way valve is positioned at the first working position, a first oil port of the first three-position four-way valve, a second oil port of the first three-position four-way valve, a third oil port of the first three-position four-way valve and a fourth oil port of the first three-position four-way valve are not communicated; when the first three-position four-way valve is positioned at the second working position, a first oil path port of the first three-position four-way valve is communicated with a third oil path port of the first three-position four-way valve, and a second oil path port of the first three-position four-way valve is communicated with a fourth oil path port of the first three-position four-way valve; when the first three-position four-way valve is positioned at a third working position, a first oil path port of the first three-position four-way valve is communicated with a second oil path port of the first three-position four-way valve, and a third oil path port of the first three-position four-way valve is communicated with a fourth oil path port of the first three-position four-way valve;

when the second three-position four-way valve is positioned at the first working position, a first oil port of the second three-position four-way valve, a second oil port of the second three-position four-way valve, a third oil port of the second three-position four-way valve and a fourth oil path port of the second three-position four-way valve are not communicated; when the second three-position four-way valve is positioned at a second working position, a first oil path port of the second three-position four-way valve is communicated with a third oil path port of the second three-position four-way valve, and a second oil path port of the second three-position four-way valve is communicated with a fourth oil path port of the second three-position four-way valve; when the second three-position four-way valve is positioned at a third working position, a first oil path port of the second three-position four-way valve is communicated with a second oil path port of the second three-position four-way valve, and a third oil path port of the second three-position four-way valve is communicated with a fourth oil path port of the second three-position four-way valve;

when the third three-position four-way valve is positioned at the first working position, the first oil port of the third three-position four-way valve, the second oil port of the third three-position four-way valve, the third oil port of the third three-position four-way valve and the fourth oil path port of the third three-position four-way valve are not communicated; when the third three-position four-way valve is positioned at the second working position, a first oil path port of the third three-position four-way valve is communicated with a third oil path port of the third three-position four-way valve, and a second oil path port of the third three-position four-way valve is communicated with a fourth oil path port of the third three-position four-way valve; when the third three-position four-way valve is positioned at a third working position, a first oil path port of the third three-position four-way valve is communicated with a second oil path port of the third three-position four-way valve, and a third oil path port of the third three-position four-way valve is communicated with a fourth oil path port of the third three-position four-way valve;

when the fourth three-position four-way valve is positioned at the first working position, a first oil port of the fourth three-position four-way valve, a second oil port of the fourth three-position four-way valve, a third oil port of the fourth three-position four-way valve and a fourth oil path port of the fourth three-position four-way valve are not communicated; when the fourth three-position four-way valve is positioned at the second working position, a first oil path port of the fourth three-position four-way valve is communicated with a third oil path port of the fourth three-position four-way valve, and a second oil path port of the fourth three-position four-way valve is communicated with a fourth oil path port of the fourth three-position four-way valve; when the fourth three-position four-way valve is positioned at the third working position, a first oil path port of the fourth three-position four-way valve is communicated with a second oil path port of the fourth three-position four-way valve, and a third oil path port of the fourth three-position four-way valve is communicated with a fourth oil path port of the fourth three-position four-way valve.

The utility model discloses an unmanned tractor quick change multiple unit valve, as preferred mode, unmanned tractor quick change multiple unit valve still includes pressure sensor, and pressure sensor sets up in the valve body side, and the pressure sensor probe sets up in the valve body oil circuit.

The utility model discloses a control method of unmanned tractor quick change multichannel valve, including following step:

s1, the tractor starts to work;

s2, judging whether the unmanned mode is adopted by an operator, if so, starting and controlling the expansion of the three-position four-way valve through a controller of the tractor to enable the tractor to enter the unmanned mode; if not, the controller of the tractor does not supply power to the three-position four-way valve and enters a manual operation mode;

s3, connecting farm tools according to the manual driving mode or the automatic driving mode in the step S2, and performing operation;

and S4, finishing the operation of the tractor and stopping the tractor.

The utility model discloses a control method of unmanned tractor quick change multichannel valve, as preferred mode, step S3 specifically includes following step under unmanned driving mode:

s31, connecting the farm tool with a quick connector expanding a three-position four-way valve;

s32, switching the first three-position six-way valve from the first working position to the second working position or the third working position through a tractor operating lever;

s33, judging whether the farm tool needs to be moved or not by the controller, if so, supplying power to the two-position three-way valve and the three-position expansion four-way valve by the controller, controlling the two-position three-way valve to be communicated with the three-position expansion four-way valve, switching the three-position expansion four-way valve from a first working position to a second working position or a third working position, and operating the step S34; if the action is not needed, the controller keeps not supplying power to the two-position three-way valve and the three-position expansion four-way valve, and the step S33 is repeatedly executed;

s34, judging whether the action is finished or not, if so, stopping supplying power to the two-position three-way valve and the three-position expansion four-way valve, and if not, continuously supplying power;

and S35, judging whether the operation is finished, if not, repeating the step S33, and if so, executing the step S4.

The utility model discloses a control method of unmanned tractor quick change multichannel valve, as preferred mode, step S3 specifically includes following step under the manual driving mode:

s35, judging whether the number of the multi-way valves needed by the used farm tool is the sum of the number of the first three-position six-way valve and the number of the second three-position six-way valve, and if so, disconnecting the first expansion interface and the second expansion interface; if not, the connection between the first expansion interface and the second expansion interface is maintained;

s36, mounting the farm tool to a twelfth manual valve port and a tenth manual valve port, and if the number of the multiway valves required by the mounted farm tool is the sum of the number of the first three-position six-way valves and the number of the second three-position six-way valves, mounting the farm tool to a fourth manual valve port and a sixth manual valve port simultaneously;

s37, the controller judges whether the farm tool needs to be moved, if so, the first three-position six-way valve is switched from the first working position to the second working position or the third working position through the tractor operating lever, and the step S38 is executed; if not, keeping the first three-position six-way valve at the first working position, and repeating the step S37;

s38, judging whether the action is finished or not, and if so, switching the first three-position six-way valve to a first working position; if not, keeping the first three-position six-way valve at the second working position or the third working position;

and S39, judging whether the operation is finished, if not, repeating the step S37, and if so, executing the step S4.

The utility model discloses a quick change multiple unit valve of unmanned tractor, oil inlet and oil return opening pass through hydraulic pressure pipe and are connected with the hydraulic fluid port all the way of the former car of tractor. And under the condition that all the electromagnetic valves are not electrified, the first three-position six-way valve, the second three-position six-way valve, the two-position three-way valve and the expansion three-position four-way valve are all positioned at a first working position, the oil inlet is communicated with the oil return port, and the oil returns to the oil cylinder, so that the neutral unloading function of the original multi-way valve of the tractor is realized.

When the hydraulic oil pipe of the farm tool is in manual operation, the hydraulic oil pipe of the farm tool is connected to the second three-position six-way valve of the manual multi-way valve of the vehicle, and the general farm tool needs three hydraulic oil pipes at most, namely, the hydraulic oil pipe is connected with the three second three-position six-way valves. If four paths are needed, the three-position four-way valve is pulled out, the farm tool is connected with the first three-position six-way valve, and when the first three-position six-way valve and the second three-position six-way valve are located at the non-first working position through the operating rod, oil enters the farm tool to drive the farm tool to act.

When the automatic driving is performed, after the farm tool is installed, the first three-position six-way valve is in a non-first working position, oil enters the extended multi-way valve, and if the farm tool needs to act, a certain oil way needs to work at the moment. At the moment, the two-position three-way valve electromagnetic valve is electrified, the controller controls the three-position four-way valve corresponding to the expansion of the oil way to work, one of the corresponding third valve port and the fourth valve port outputs high-pressure oil, the other oil port is an oil return port, and the high-pressure oil required by different actions of different farm implements is different, so that the high-pressure oil needs to be judged in the control system. And after the action of the farm tool is finished, the corresponding two-position three-way valve and the three-position four-way valve return to the original positions, and the action is finished. Some farm implements may require 2, 3 oil lines to be operated sequentially or simultaneously, and these operations are required to be output by the controller.

The utility model discloses beneficial effect as follows:

(1) the manual multi-way valve and the expansion multi-way valve of the vehicle are detachably connected, so that the overall transformation and upgrading of a hydraulic system of the whole vehicle are avoided;

(2) the expanded multi-way valve is detachable, so that when the manual multi-way valve of the vehicle is switched to be manual, enough oil ways are available for connecting agricultural implements;

(3) the original vehicle does not need to be disassembled, and an integral product can be formed and is independent of the whole vehicle system;

(4) the vehicle manual multi-way valve and the expansion multi-way valve are respectively used for manual control and automatic control, and manual and automatic switching is realized by controlling the vehicle manual multi-way valve through detachable connection of the vehicle manual multi-way valve and the expansion multi-way valve and on-off of an oil path of the expansion multi-way valve.

Drawings

FIG. 1 is a schematic view of a quick change multi-way valve of an unmanned tractor;

FIG. 2 is a schematic view of a valve body of a quick-change multi-way valve of an unmanned tractor;

FIG. 3 is a schematic diagram of a three-position four-way valve set of a quick-change multi-way valve of an unmanned tractor;

FIG. 4 is a schematic view of an unmanned tractor quick-change multi-way valve quick-change connector oil way group;

FIG. 5 is a schematic view of a first quick-change multi-way valve oil port group of an unmanned tractor;

FIG. 6 is a schematic view of a second quick-change multi-way valve oil port group of an unmanned tractor;

FIG. 7 is a schematic view of a third quick-change multi-way valve oil port group of an unmanned tractor;

FIG. 8 is a schematic view of a fourth quick-change multi-way valve oil port group of an unmanned tractor;

FIG. 9 is a schematic view of an unmanned tractor quick change multi-way valve manifold block;

FIG. 10 is a schematic view of an oil port group of a three-position four-way valve for a quick-change multi-way valve of an unmanned tractor;

FIG. 11 is a schematic view of a first three-position four-way valve oil port set of a quick-change multi-way valve of an unmanned tractor;

FIG. 12 is a schematic view of a second three-position four-way valve oil port set of a quick-change multi-way valve of an unmanned tractor;

FIG. 13 is a schematic view of a third three-position four-way valve oil port group of a quick-change multi-way valve of an unmanned tractor;

FIG. 14 is a schematic view of a fourth three-position four-way valve oil port set of a multi-way valve for quick change of an unmanned tractor

FIG. 15 is a schematic view of an intersection set of a multi-way valve and a two-position three-way valve for quick change of an unmanned tractor;

FIG. 16 is a schematic view of the working principle of a quick-change multi-way valve of an unmanned tractor;

fig. 17 is a schematic diagram of an internal oil circuit of a quick-change multi-way valve of an unmanned tractor.

Reference numerals:

1. mounting a bracket; 2. a two-position three-way valve; 3. a three-position four-way valve bank; 31. a first three-position four-way valve; 32. a second three-position four-way valve; 33. a third three-position four-way valve; 34. a fourth three-position four-way valve; 4. a valve body; 41. a valve body; 42. a quick connector oil way group; 421. a first express item junction group; 4211. a first upper express mail oil junction; 4212. a first lower express item oil junction; 422. a second express item junction group; 4221. a second upper express mail oil junction; 4222. A second lower express item oil junction; 423. a third express item fuel junction group; 4231. a third upper express mail oil port; 4232. a third lower express mail oil junction; 424. a fourth express item fuel junction group; 4241. a fourth upper express mail oil port; 4242. a fourth lower express item oil port; 43. A valve oil port group; 431. a two-position three-way valve oil port group; 4311. a first two-position three-way valve oil port; 4312. a second two-position three-way valve oil port; 4313. a third two-position three-way valve oil port; 432. a three-position four-way valve oil port group; 4321. a first three-position four-way valve oil port group; 43211, a first oil port of a first three-position four-way valve; 43212. a first three-position four-way valve is arranged at the first oil port; 43213. a third oil port of the first three-position four-way valve; 43214. a fourth oil port of the first three-position four-way valve; 4322. a second three-position four-way valve oil port group; 43221. a second three-position four-way valve at a first oil port; 43222. a second oil port of the second three-position four-way valve; 43223. a third oil port of the second three-position four-way valve; 43224. a fourth oil port of the second three-position four-way valve; 4323. a third three-position four-way valve oil port group; 43231. a third three-position four-way valve at a first oil port; 43232. a third three-position four-way valve at a second oil port; 43233. a third oil port of the third three-position four-way valve; 43234, a fourth oil port of a third three-position four-way valve; 4324. a fourth three-position four-way valve oil port group; 43241. a fourth three-position four-way valve at the first oil port; 43242. a fourth three-position four-way valve at a second oil port; 43243. a fourth three-position four-way valve at a third oil port; 43244. a fourth oil port of the fourth three-position four-way valve; 44. a first extended interface oil port; 45. a second expanded interface oil port; 5. a first expansion interface; 6. a second expansion interface; 7. and (6) quick-connecting parts.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example 1

As shown in fig. 1, an unmanned tractor quick change multiple unit valve, including installing support 1, two three-position three-way valve 2, three-position four-way valve group 3, valve body 4, first expansion interface 5, interface 6 and a plurality of quick connector 7 are expanded to the second, valve body 4 is the hexahedron, installing support 1 sets up in the 4 side surfaces of valve body, two three-position three-way valve 2 and three-position four-way valve group 3 set up in the 4 upper ends of valve body, first expansion interface 5 and second expand interface 6 and set up in the 4 front ends of valve body, valve body 4 is connected the side opposite face with installing support 1 and is set up quick connector 7.

As shown in fig. 2, the valve body 4 includes a valve body 41, a quick connector oil port group 42, a valve oil port group 43, a first expanded interface oil port 44 and a second expanded interface oil port 45, the valve body 41 is a parallelepiped, the quick connector oil port group 42 is composed of a plurality of quick connector oil ports, the valve oil port group 43 is composed of a plurality of valve oil ports, the quick connector oil port is disposed on the side surface of the valve body 4 opposite to the connecting surface of the valve body 4 and the mounting bracket 1, the valve oil port group 43 is disposed on the upper surface of the valve body 4, the quick connector oil port group and the valve oil port are communicated with each other in the valve body 41, the first expanded interface oil port 44 and the second expanded interface are disposed on the front surface of the valve body 4, the first expanded interface oil port 44 and the second expanded interface oil port 45 are both communicated with the valve oil port group 43, the first expanded interface oil port 44 is connected with the first expanded interface 5, the second expansion interface oil port 45 is connected with the second expansion interface 6, and the quick connector oil port group 42 is connected with the quick connector 7.

As shown in fig. 3, the three-position four-way valve group 3 includes a first three-position four-way valve 31, a second three-position four-way valve 32, a third three-position four-way valve 33 and a fourth three-position four-way valve 34, wherein the first three-position four-way valve 31, the second three-position four-way valve 32, the third three-position four-way valve 33 and the fourth three-position four-way valve 34 are sequentially arranged on the upper surface of the valve body 41 along the long side of the valve body 41 and connected with a valve oil port group 43; the two-position three-way valve 2 is connected with the valve oil port group 43.

As shown in fig. 4, the quick-connection piece oil port group 42 includes a first quick-connection piece oil port group 421, a second quick-connection piece oil port group 422, a third quick-connection piece oil port group 423, and a fourth quick-connection piece oil port group 424, and the first quick-connection piece oil port group 421, the second quick-connection piece oil port group 422, the third quick-connection piece oil port group 423, and the fourth quick-connection piece oil port group 424 are sequentially arranged along the long side of the side surface of the valve body 41.

As shown in fig. 5, the first quick-connection piece oil port group 421 includes a first upper quick-connection piece oil port 4211 and a first lower quick-connection piece oil port 4212, and a connecting line of axes of the first upper quick-connection piece oil port 4211 and the first lower quick-connection piece oil port 4212 is parallel to a wide side of the valve body 41.

As shown in fig. 6, the second quick-connection piece oil port group 422 includes a second upper quick-connection piece oil port 4221 and a second lower quick-connection piece oil port 4222, and a connecting line of axes of the second upper quick-connection piece oil port 4221 and the second lower quick-connection piece oil port 4222 is parallel to the wide side of the valve body 41.

As shown in fig. 7, the third quick-connection joint group 423 includes a third upper quick-connection joint 4231 and a third lower quick-connection joint 4232, and a connecting line of axes of the third upper quick-connection joint 4231 and the third lower quick-connection joint 4232 is parallel to the wide side of the valve body 41.

As shown in fig. 8, the fourth quick-connection piece oil port group 424 includes a fourth upper quick-connection piece oil port 4241 and a fourth lower quick-connection piece oil port 4242, and a connecting line of axes of the fourth upper quick-connection piece oil port 4241 and the fourth lower quick-connection piece oil port 4242 is parallel to a wide side of the valve body 41.

As shown in fig. 9, the valve oil port group 43 includes a two-position three-way valve oil port group 431 and a three-position four-way valve oil port group 432, and the two-position three-way valve oil port group 431 and the three-position four-way valve oil port group 432 are respectively disposed on the upper surface of the valve body 41.

As shown in fig. 10, the three-position four-way valve oil port group 432 includes a first three-position four-way valve oil port group 4321, a second three-position four-way valve oil port group 4322, a third three-position four-way valve oil port group 4323 and a fourth three-position four-way valve oil port group 4324, and the first three-position four-way valve oil port group 4321, the second three-position four-way valve oil port group 4322, the third three-position four-way valve oil port group 4323 and the fourth three-position four-way valve oil port group 4324 are sequentially disposed on the upper surface of the valve body 41

As shown in fig. 11, the first three-position four-way valve oil port group 4321 includes a first three-position four-way valve first oil path port 43211, a first three-position four-way valve second oil path port 43212, a first three-position four-way valve third oil path port 43213, and a first three-position four-way valve fourth oil path port 43214, and the first three-position four-way valve first oil path port 43211, the first three-position four-way valve second oil path port 43212, the first three-position four-way valve third oil path port 43213, and the first three-position four-way valve fourth oil path port 43214 are disposed on the upper surface of the valve body 41 at the same longitudinal position as the first quick-connection member oil port group 421.

As shown in fig. 12, the second three-position four-way valve oil port group 4322 includes a second three-position four-way valve first oil path port 43221, a second three-position four-way valve second oil path port 43222, a second three-position four-way valve third oil path port 43223, and a second three-position four-way valve fourth oil path port 43224, and the second three-position four-way valve first oil path port 43221, the second three-position four-way valve second oil path port 43222, the second three-position four-way valve third oil path port 43223, and the second three-position four-way valve fourth oil path port 43224 are disposed on the upper surface of the valve body 41 at the same longitudinal position as the second quick-connection member oil port group 422.

As shown in fig. 13, the third three-position four-way valve oil port group 4323 includes a third three-position four-way valve first oil path port 43231, a third three-position four-way valve second oil path port 43232, a third three-position four-way valve third oil path port 43233, and a third three-position four-way valve fourth oil path port 43234, and the third three-position four-way valve first oil path port 43231, the third three-position four-way valve second oil path port 43232, the third three-position four-way valve third oil path port 43233, and the third three-position four-way valve fourth oil path port 43234 are disposed on the upper surface of the valve body 41 at the same longitudinal position as the third quick connector oil port group 423.

As shown in fig. 14, the fourth three-position four-way valve oil port group 4324 includes a fourth three-position four-way valve first oil path port 43241, a fourth three-position four-way valve second oil path port 43242, a fourth three-position four-way valve third oil path port 43243 and a fourth three-position four-way valve fourth oil path port 43244, and the fourth three-position four-way valve first oil path port 43241, the fourth three-position four-way valve second oil path port 43242, the fourth three-position four-way valve third oil path port 43243 and the fourth three-position four-way valve fourth oil path port 43244 are disposed on the upper surface of the valve body 41 at the same longitudinal position as the fourth quick-connection member oil port group 424.

As shown in fig. 15, the two-position three-way valve oil port group 431 includes a first two-position three-way valve oil port 4311, a second two-position three-way valve oil port 4312 and a third two-position three-way valve oil port 4313, and the first two-position three-way valve oil port 4311, the second two-position three-way valve oil port 4312 and the third two-position three-way valve oil port 4313 are disposed on the upper surface of the valve body 41.

The first extended interface oil port 44 is communicated with the first two-position three-way valve oil port 4311, and the second extended interface oil port 45 is communicated with the second two-position three-way valve oil port 4312, the first three-position four-way valve first oil port 43211, the second three-position four-way valve first oil port 43221, the third three-position four-way valve first oil port 43231 and the fourth three-position four-way valve first oil port 43241; a second oil path port 43212 of the first three-position four-way valve is communicated with a first upper quick connector oil path port 4211, a second oil path port 43222 of the second three-position four-way valve is communicated with a second upper quick connector oil path port 4221, a second oil path port 43232 of the third three-position four-way valve is communicated with a third upper quick connector oil path port 4231, and a second oil path port 43242 of the fourth three-position four-way valve is communicated with a fourth upper quick connector oil path port 4241; a third oil path port 43213 of the first three-position four-way valve is communicated with a first lower quick connector oil path port 4212, a third oil path port 43223 of the second three-position four-way valve is communicated with a second lower quick connector oil path port 4222, a third oil path port 43233 of the third three-position four-way valve is communicated with a third lower quick connector oil path port 4232, and a third oil path port 43243 of the fourth three-position four-way valve is communicated with a fourth lower quick connector oil path port 4242; a first three-position four-way valve fourth oil path port 43214, a second three-position four-way valve fourth oil path port 43224, a third three-position four-way valve fourth oil path port 43234, a fourth three-position four-way valve fourth oil path port 43244, and a third two-position three-way valve oil path port 4313 are communicated with each other.

When the two-position three-way valve is located at the first working position, the first two-position three-way valve oil port 4311 is connected with the second two-position three-way valve oil port 4312, and when the two-position three-way valve is located at the second working position, the first two-position three-way valve oil port 4311 is connected with the third two-position three-way valve oil port 4313;

when the first three-position four-way valve 31 is located at the first working position, the first oil path port 43211 of the first three-position four-way valve, the second oil path port 43212 of the first three-position four-way valve, the third oil path port 43213 of the first three-position four-way valve and the fourth oil path port 43214 of the first three-position four-way valve are not communicated; when the first three-position four-way valve 31 is located at the second working position, the first oil port 43211 of the first three-position four-way valve is communicated with the third oil port 43213 of the first three-position four-way valve, and the second oil port 43212 of the first three-position four-way valve is communicated with the fourth oil port 43214 of the first three-position four-way valve; when the first three-position four-way valve 31 is located at the third working position, the first oil path port 43211 of the first three-position four-way valve is communicated with the second oil path port 43212 of the first three-position four-way valve, and the third oil path port 43213 of the first three-position four-way valve is communicated with the fourth oil path port 43214 of the first three-position four-way valve;

when the second three-position four-way valve 32 is located at the first working position, the first oil path port 43221 of the second three-position four-way valve, the second oil path port 43222 of the second three-position four-way valve, the third oil path port 43223 of the second three-position four-way valve and the fourth oil path port 43224 of the second three-position four-way valve are not communicated; when the second three-position four-way valve 32 is located at the second working position, a first oil port 43221 of the second three-position four-way valve is communicated with a third oil port 43223 of the second three-position four-way valve, and a second oil port 43222 of the second three-position four-way valve is communicated with a fourth oil port 43224 of the second three-position four-way valve; when the second three-position four-way valve 32 is located at the third working position, the first oil path port 43221 of the second three-position four-way valve is communicated with the second oil path port 43222 of the second three-position four-way valve, and the third oil path port 43223 of the second three-position four-way valve is communicated with the fourth oil path port 43224 of the second three-position four-way valve;

when the third three-position four-way valve 33 is located at the first working position, the first oil path port 43231, the second oil path port 43232, the third oil path port 43233 and the fourth oil path port 43234 of the third three-position four-way valve are all not communicated; when the third three-position four-way valve 33 is located at the second working position, a first oil port 43231 of the third three-position four-way valve is communicated with a third oil port 43233 of the third three-position four-way valve, and a second oil port 43232 of the third three-position four-way valve is communicated with a fourth oil port 43234 of the third three-position four-way valve; when the third three-position four-way valve 33 is located at the third working position, a first oil path port 43231 of the third three-position four-way valve is communicated with a second oil path port 43232 of the third three-position four-way valve, and a third oil path port 43233 of the third three-position four-way valve is communicated with a fourth oil path port 43234 of the third three-position four-way valve;

when the fourth three-position four-way valve 34 is located at the first working position, the fourth three-position four-way valve first oil path port 43241, the fourth three-position four-way valve second oil path port 43242, the fourth three-position four-way valve third oil path port 43243 and the fourth three-position four-way valve fourth oil path port 43244 are all not communicated; when the fourth three-position four-way valve 34 is located at the second working position, the fourth three-position four-way valve first oil port 43241 is communicated with the fourth three-position four-way valve third oil port 43243, and the fourth three-position four-way valve second oil port 43242 is communicated with the fourth three-position four-way valve fourth oil port 43244; when the fourth three-position four-way valve 34 is in the third operating position, the fourth three-position four-way valve first oil passage port 43241 is in communication with the fourth three-position four-way valve second oil passage port 43242, and the fourth three-position four-way valve third oil passage port 43243 is in communication with the fourth three-position four-way valve fourth oil passage port 43244.

The quick-change multi-way valve of the unmanned tractor further comprises a pressure sensor, the pressure sensor is arranged on the side face of the valve body 4, and a probe of the pressure sensor is arranged in an oil way of the valve body 4.

As shown in fig. 16 and 17, the oil inlet and the oil return port are connected with an oil inlet and an oil outlet of a tractor original vehicle through hydraulic pipes. And under the state that all the electromagnetic valves are not electrified, the first three-position six-way valve, the second three-position six-way valve, the two-position three-way valve and the expansion three-position four-way valve are all positioned at the first working position, and the oil directly returns to the oil cylinder in the original multi-way valve of the tractor and is positioned at the middle unloading state.

When the hydraulic oil pipe of the farm tool is in manual operation, the hydraulic oil pipe of the farm tool is connected to the second three-position six-way valve of the manual multi-way valve of the vehicle, and the general farm tool needs three hydraulic oil pipes at most, namely, the hydraulic oil pipe is connected with the three second three-position six-way valves. If four paths are needed, the three-position four-way valve is pulled out, the farm tool is connected with the first three-position six-way valve, and when the first three-position six-way valve and the second three-position six-way valve are located at the non-first working position through the operating rod, oil enters the farm tool to drive the farm tool to act.

When the automatic driving is performed, after the farm tool is installed, the first three-position six-way valve is in a non-first working position, oil enters the extended multi-way valve, and if the farm tool needs to act, a certain oil way needs to work at the moment. At the moment, the two-position three-way valve electromagnetic valve is electrified, the controller controls the three-position four-way valve corresponding to the expansion of the oil way to work, one of the corresponding third valve port and the fourth valve port outputs high-pressure oil, the other oil port is an oil return port, and the high-pressure oil required by different actions of different farm implements is different, so that the high-pressure oil needs to be judged in the control system. And after the action of the farm tool is finished, the corresponding two-position three-way valve and the three-position four-way valve return to the original positions, and the action is finished. Some farm implements may require 2, 3 oil lines to be operated sequentially or simultaneously, and these operations are required to be output by the controller.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (9)

1. The utility model provides an unmanned tractor quick change multiple unit valve which characterized in that: including installing support (1), two three-way valve (2), tribit cross valves (3), valve body (4), first expansion interface (5), second expansion interface (6) and a plurality of fast union piece (7), valve body (4) are the hexahedron, installing support (1) set up in valve body (4) side surface, two three-way valve (2) with tribit cross valves (3) set up in valve body (4) upper end, first expansion interface (5) with second expansion interface (6) set up in valve body (4) front end, valve body (4) with installing support (1) is connected the side and is set up fast union piece (7).

2. The unmanned tractor quick-change multi-way valve according to claim 1, wherein the valve body (4) comprises a valve body (41), a quick connector oil port group (42), a valve oil port group (43), a first expanded interface oil port (44) and a second expanded interface oil port (45), the valve body (41) is a parallelepiped, the quick connector oil port group (42) is composed of a plurality of quick connector oil ports, the valve oil port group (43) is composed of a plurality of valve oil ports, the quick connector oil port is arranged on the side surface of the valve body (4) opposite to the connecting surfaces of the valve body (4) and the mounting bracket (1), the valve oil port group (43) is arranged on the upper surface of the valve body (4), and the quick connector oil port group (42) and the valve oil port are mutually communicated in the valve body (41), the first expansion interface oil port (44) and the second expansion interface are arranged on the front surface of the valve body (4), the first expansion interface oil port (44) and the second expansion interface oil port (45) are communicated with the valve oil port group (43), the first expansion interface oil port (44) is connected with the first expansion interface (5), the second expansion interface oil port (45) is connected with the second expansion interface (6), and the quick connector oil port group (42) is connected with the quick connector (7).

3. The unmanned tractor quick-change multi-way valve according to claim 2, characterized in that: the three-position four-way valve group (3) comprises a first three-position four-way valve (31), a second three-position four-way valve (32), a third three-position four-way valve (33) and a fourth three-position four-way valve (34), wherein the first three-position four-way valve (31), the second three-position four-way valve (32), the third three-position four-way valve (33) and the fourth three-position four-way valve (34) are sequentially arranged on the upper surface of the valve body (41) along the long edge of the valve body (41) and are connected with the valve oil port group (43); the two-position three-way valve (2) is connected with the valve oil port group (43).

4. The unmanned tractor quick change multi-way valve according to claim 3, characterized in that: the quick connector oil port group (42) comprises a first quick connector oil port group (421), a second quick connector oil port group (422), a third quick connector oil port group (423) and a fourth quick connector oil port group (424), and the first quick connector oil port group (421), the second quick connector oil port group (422), the third quick connector oil port group (423) and the fourth quick connector oil port group (424) are sequentially arranged along the long side of the side face of the valve body (41); the first quick-connection oil port group (421) comprises a first upper quick-connection oil port (4211) and a first lower quick-connection oil port (4212), and the axis connecting line of the first upper quick-connection oil port (4211) and the first lower quick-connection oil port (4212) is parallel to the side broadside of the valve body (41); the second quick-connection oil port group (422) comprises a second upper quick-connection oil port (4221) and a second lower quick-connection oil port (4222), and the axis connecting line of the second upper quick-connection oil port (4221) and the second lower quick-connection oil port (4222) is parallel to the side broadside of the valve body (41); the third quick-connection oil port group (423) comprises a third upper quick-connection oil port (4231) and a third lower quick-connection oil port (4232), and the axis connecting line of the third upper quick-connection oil port (4231) and the third lower quick-connection oil port (4232) is parallel to the wide side of the valve body (41); the fourth quick-connection oil port group (424) comprises a fourth upper quick-connection oil port (4241) and a fourth lower quick-connection oil port (4242), and a connecting line of the axes of the fourth upper quick-connection oil port (4241) and the fourth lower quick-connection oil port (4242) is parallel to the wide side of the valve body (41).

5. The unmanned tractor quick change multi-way valve according to claim 4, characterized in that: the valve oil port group (43) comprises a two-position three-way valve oil port group (431) and a three-position four-way valve oil port group (432), and the two-position three-way valve oil port group (431) and the three-position four-way valve oil port group (432) are respectively arranged on the upper surface of the valve body (41); the three-position four-way valve oil port group (432) comprises a first three-position four-way valve oil port group (4321), a second three-position four-way valve oil port group (4322), a third three-position four-way valve oil port group (4323) and a fourth three-position four-way valve oil port group (4324), wherein the first three-position four-way valve oil port group (4321), the second three-position four-way valve oil port group (4322), the third three-position four-way valve oil port group (4323) and the fourth three-position four-way valve oil port group (4324) are sequentially arranged on the upper surface of the valve body (41); the first three-position four-way valve oil port group (4321) comprises a first oil port (43211) of a first three-position four-way valve, a second oil port (43212) of the first three-position four-way valve, a third oil port (43213) of the first three-position four-way valve and a fourth oil port (43214) of the first three-position four-way valve, wherein the first oil port (43211) of the first three-position four-way valve, the second oil port (43212) of the first three-position four-way valve, the third oil port (43213) of the first three-position four-way valve and the fourth oil port (43214) of the first three-position four-way valve are arranged on the upper surface of the valve body (41) at the same longitudinal position of the first quick connector oil port group (421); the second three-position four-way valve oil port group (4322) comprises a second three-position four-way valve first oil port (43221), a second three-position four-way valve second oil port (43222), a second three-position four-way valve third oil port (43223) and a second three-position four-way valve fourth oil port (43224), wherein the second three-position four-way valve first oil port (43221), the second three-position four-way valve second oil port (43222), the second three-position four-way valve third oil port (43223) and the second three-position four-way valve fourth oil port (43224) are arranged on the upper surface of the valve body (41) at the same longitudinal position of the second quick connector oil port group (422); the third three-position four-way valve oil port group (4323) comprises a third three-position four-way valve first oil port (43231), a third three-position four-way valve second oil port (43232), a third three-position four-way valve third oil port (43233) and a third three-position four-way valve fourth oil port (43234), wherein the third three-position four-way valve first oil port (43231), the third three-position four-way valve second oil port (43232), the third three-position four-way valve third oil port (43233) and the third three-position four-way valve fourth oil port (43234) are arranged on the upper surface of the valve body (41) at the same longitudinal position of the third quick connector oil port group (423); the fourth three-position four-way valve oil port group (4324) comprises a fourth three-position four-way valve first oil port (43241), a fourth three-position four-way valve second oil port (43242), a fourth three-position four-way valve third oil port (43243) and a fourth three-position four-way valve fourth oil port (43244), wherein the fourth three-position four-way valve first oil port (43241), the fourth three-position four-way valve second oil port (43242), the fourth three-position four-way valve third oil port (43243) and the fourth three-position four-way valve fourth oil port (43244) are arranged on the upper surface of the valve body (41) at the same longitudinal position of the fourth quick connector oil port group (424).

6. The unmanned tractor quick change multi-way valve according to claim 5, characterized in that: the two-position three-way valve oil port group (431) comprises a first two-position three-way valve oil port (4311), a second two-position three-way valve oil port (4312) and a third two-position three-way valve oil port (4313), wherein the first two-position three-way valve oil port (4311), the second two-position three-way valve oil port (4312) and the third two-position three-way valve oil port (4313) are arranged on the upper surface of the valve body (41).

7. The unmanned tractor quick change multi-way valve according to claim 6, characterized in that: the first expansion interface oil port (44) is communicated with the first two-position three-way valve oil port (4311), and the second expansion interface oil port (45) is communicated with the second two-position three-way valve oil port (4312), the first three-position four-way valve oil port (43211), the first three-position four-way valve oil port (43221), the first third three-position four-way valve oil port (43231) and the first fourth three-position four-way valve oil port (43241); the second oil port (43212) of the first three-position four-way valve is communicated with the first upper express connector oil port (4211), the second oil port (43222) of the second three-position four-way valve is communicated with the second upper express connector oil port (4221), the second oil port (43232) of the third three-position four-way valve is communicated with the third upper express connector oil port (4231), and the second oil port (43242) of the fourth three-position four-way valve is communicated with the fourth upper express connector oil port (4241); a third oil port (43213) of the first three-position four-way valve is communicated with the first lower express item oil port (4212), a third oil port (43223) of the second three-position four-way valve is communicated with the second lower express item oil port (4222), a third oil port (43233) of the third three-position four-way valve is communicated with the third lower express item oil port (4232), and a third oil port (43243) of the fourth three-position four-way valve is communicated with the fourth lower express item oil port (4242); the first three-position four-way valve fourth oil port (43214), the second three-position four-way valve fourth oil port (43224), the third three-position four-way valve fourth oil port (43234), the fourth three-position four-way valve fourth oil port (43244) and the third two-position three-way valve oil port (4313) are communicated with each other.

8. The unmanned tractor quick change multi-way valve according to claim 7, characterized in that: when the two-position three-way valve is positioned at a first working position, the first two-position three-way valve oil port (4311) is connected with the second two-position three-way valve oil port (4312), and when the two-position three-way valve is positioned at a second working position, the first two-position three-way valve oil port (4311) is connected with the third two-position three-way valve oil port (4313);

when the first three-position four-way valve (31) is positioned at a first working position, a first oil port (43211) of the first three-position four-way valve, a second oil port (43212) of the first three-position four-way valve, a third oil port (43213) of the first three-position four-way valve and a fourth oil port (43214) of the first three-position four-way valve are not communicated; when the first three-position four-way valve (31) is located at a second working position, a first oil port (43211) of the first three-position four-way valve is communicated with a third oil port (43213) of the first three-position four-way valve, and a second oil port (43212) of the first three-position four-way valve is communicated with a fourth oil port (43214) of the first three-position four-way valve; when the first three-position four-way valve (31) is located at a third working position, a first oil port (43211) of the first three-position four-way valve is communicated with a second oil port (43212) of the first three-position four-way valve, and a third oil port (43213) of the first three-position four-way valve is communicated with a fourth oil port (43214) of the first three-position four-way valve;

when the second three-position four-way valve (32) is positioned at a first working position, a first oil port (43221) of the second three-position four-way valve, a second oil port (43222) of the second three-position four-way valve, a third oil port (43223) of the second three-position four-way valve and a fourth oil port (43224) of the second three-position four-way valve are not communicated; when the second three-position four-way valve (32) is located at a second working position, a first oil port (43221) of the second three-position four-way valve is communicated with a third oil port (43223) of the second three-position four-way valve, and a second oil port (43222) of the second three-position four-way valve is communicated with a fourth oil port (43224) of the second three-position four-way valve; when the second three-position four-way valve (32) is located at a third working position, a first oil port (43221) of the second three-position four-way valve is communicated with a second oil port (43222) of the second three-position four-way valve, and a third oil port (43223) of the second three-position four-way valve is communicated with a fourth oil port (43224) of the second three-position four-way valve;

when the third three-position four-way valve (33) is located at a first working position, a first oil port (43231) of the third three-position four-way valve, a second oil port (43232) of the third three-position four-way valve, a third oil port (43233) of the third three-position four-way valve and a fourth oil port (43234) of the third three-position four-way valve are not communicated; when the third three-position four-way valve (33) is located at a second working position, a first oil port (43231) of the third three-position four-way valve is communicated with a third oil port (43233) of the third three-position four-way valve, and a second oil port (43232) of the third three-position four-way valve is communicated with a fourth oil port (43234) of the third three-position four-way valve; when the third three-position four-way valve (33) is located at a third working position, a first oil port (43231) of the third three-position four-way valve is communicated with a second oil port (43232) of the third three-position four-way valve, and a third oil port (43233) of the third three-position four-way valve is communicated with a fourth oil port (43234) of the third three-position four-way valve;

when the fourth three-position four-way valve (34) is located at a first working position, a first oil port (43241) of the fourth three-position four-way valve, a second oil port (43242) of the fourth three-position four-way valve, a third oil port (43243) of the fourth three-position four-way valve and a fourth oil port (43244) of the fourth three-position four-way valve are not communicated; when the fourth three-position four-way valve (34) is located at the second working position, a first oil port (43241) of the fourth three-position four-way valve is communicated with a third oil port (43243) of the fourth three-position four-way valve, and a second oil port (43242) of the fourth three-position four-way valve is communicated with a fourth oil port (43244) of the fourth three-position four-way valve; when the fourth three-position four-way valve (34) is located at a third working position, a first oil port (43241) of the fourth three-position four-way valve is communicated with a second oil port (43242) of the fourth three-position four-way valve, and a third oil port (43243) of the fourth three-position four-way valve is communicated with a fourth oil port (43244) of the fourth three-position four-way valve.

9. The unmanned tractor quick-change multi-way valve according to claim 1, characterized in that: the quick-change multi-way valve of the unmanned tractor further comprises a pressure sensor, the pressure sensor is arranged on the side face of the valve body (4), and a probe of the pressure sensor is arranged in an oil way of the valve body (4).

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