A skid steer loader hydraulic system

Abstract

The application relates to the technical field of hydraulic systems and discloses a working hydraulic system of a skid loader, which comprises a conveying mechanism installed on the outer wall of a pilot valve, and the conveying mechanism comprises a connecting pipe fixedly connected to the top of the pilot valve; when an operator detects the oil conveying pipe, the lock rod is pulled out, the rotating shell is rotated, at the moment, the push plate exerts a pushing force on the suction plate, so that the suction plate moves away from the connector I, if the device has good air tightness, the operator will feel great resistance generated during the rotation of the rotating shell, and the operator will be difficult to rotate, at the moment, the air tightness between the oil conveying pipes is good, if the operator can easily rotate the rotating shell, it is proved that the air tightness between the oil conveying pipes is poor, the sealing performance of the oil conveying pipe can be quickly judged through the mode, external detection tools are not needed, and the detection efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of hydraulic system technology, specifically to a working hydraulic system for a skid steer loader. Background Technology

[0002] The auxiliary hydraulic system of the skid steer loader is controlled by a handle. A closed-loop piston pump supplies oil to the main control valve. The valve core of the main control valve controls the oil inlet and outlet of the auxiliary hydraulic system. Quick-connect couplings in the auxiliary hydraulic system connect to attachments to enable attachment operation. When performing airtightness testing on the connection between oil pipelines and valves, it is usually necessary to introduce external testing devices and rely on additional pipeline connections and instrument readings. The entire testing process is not only cumbersome and complicated, but also time-consuming, making it difficult to meet the needs of rapid maintenance. In response to the above problems, the following solutions are proposed. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention provides a working hydraulic system for a skid steer loader, including an oil tank, a pump body fixedly connected to the top of the oil tank, a pilot valve fixedly connected to the outer wall of the pump body's output end, and a hydraulically controlled directional valve fixedly connected to the top of the oil tank, and further including: A conveying mechanism is installed on the outer wall of the pilot valve, and the conveying mechanism includes a connecting pipe that is fixedly connected to the top of the pilot valve. A rotating mechanism is installed on the outer wall of the conveying mechanism, and the rotating mechanism includes a rotating housing; A pushing mechanism is installed on the inner wall of the rotating mechanism, and the pushing mechanism includes a push plate; The operator starts the pump to allow oil from the tank to enter the pilot valve and the hydraulic directional valve.

[0004] Preferably, the conveying mechanism further includes: The conveying assembly is installed on the outer wall of the connecting pipe; A connecting component is installed on the outer wall of the conveying component; The operator installs the connecting component onto the outer wall of the conveying component.

[0005] Preferably, the rotating mechanism further includes: A rotating component is installed on the outer wall of the connecting component; The scraping component is installed on the outer wall of the rotating component; In testing the airtightness of the device, the pushing mechanism is pulled out and the rotating shell is then rotated. If it is difficult to rotate, the airtightness is good.

[0006] Preferably, the driving mechanism includes: The push component is installed on the inner wall of the rotating component; An oil storage component is installed on the inner wall of the actuating component; When the operator rotates the rotating shell, the pushing component is pushed, causing the pushing component to squeeze the oil storage component.

[0007] Preferably, the delivery assembly includes an oil delivery pipe fixedly connected to the end of the connecting pipe away from the pilot valve; The operator pushes a lever on the machine to open the pilot valve, allowing the oil inside the pilot valve to enter the oil delivery pipe.

[0008] Preferably, the connecting assembly includes a connector one fixedly connected to the outer wall of the oil pipeline, and a connector two fixedly connected to the outer wall of the oil pipeline. The operator connects the two oil pipelines by connecting connector one and connector two to each other.

[0009] Preferably, the rotating assembly includes a rotating ring rotatably connected to the outer wall of the second connector, and a plurality of connecting plates are fixedly connected to the outer wall of the rotating ring, with the end of the connecting plate away from the rotating ring being rotatably connected to the rotating shell. The rotating ring has several holes on the side near connector one. There is a lot of friction between the rotating ring and connector two. When the operator pulls out the oil storage component, he holds the outer wall of the rotating shell and rotates it. At this time, the rotating ring will not rotate, but the rotating shell will start to rotate.

[0010] Preferably, the scraping assembly includes a plurality of collecting plates fixedly connected to one side of the rotating ring near the connector, and a contact plate fixedly connected to the top of the collecting plates; The collection plate has several collection holes inside. One end of the contact plate is raised and will contact the inner wall of connector one. When the operator does not pull out the oil storage component, the contact plate can scrape off the oil stains attached to the inner wall of connector one by rotating the rotating shell.

[0011] Preferably, the pushing component includes several oil inlet chambers fixedly connected to the outer wall of the rotating ring, and several push plates are fixedly connected at the ends away from the rotating ring to the side of the rotating shell close to the rotating ring; Between each pair of connecting plates is a pushing component. By rotating the rotating shell, the operator can cause the pushing plate to squeeze the oil storage component, making the oil storage component tend to move backward.

[0012] Preferably, the oil storage assembly includes a suction plate slidably connected to the inner wall of the oil inlet chamber, a roller rotatably connected to the side of the suction plate away from the rotating ring, and a locking rod slidably connected to the inner wall of the rotating shell; When the locking rod is not pulled out, the operator can rotate the housing to scrape the oil droplets inside the connector by the contact plate, and let the oil droplets enter the oil inlet chamber through the collection plate.

[0013] The present invention has the following beneficial effects: (1) By setting a push plate, when the operator tests the oil pipeline, by pulling out the locking rod and then rotating the rotating shell, the push plate will apply a pushing force to the suction plate, so that the suction plate moves away from the connector. If the device is airtight, the operator will feel a large resistance generated during the rotation of the rotating shell, and the operator will find it difficult to rotate. At this time, the airtightness between the oil pipelines is good. If the operator can easily rotate the rotating shell, it proves that the airtightness between the oil pipelines is poor. In this way, it is possible to quickly determine whether the oil pipeline is well sealed, without the need for external testing tools, thus improving the testing efficiency.

[0014] (2) By setting a contact plate, when oil leaks from between connector 2 and connector 1, the leaked oil will enter the position of the contact plate. When the oil comes into contact with the contact plate, it will slide down the surface of the contact plate and finally come into contact with the hole on the collection plate. When a lot of liquid flows out, the liquid will enter the oil inlet chamber through the hole on the collection plate. In this way, it is prevented that a large amount of oil will leak out from the gap between connector 2 and connector 1, causing the oil droplets to evaporate when exposed to high temperature and form flammable oil mist, thereby posing a risk of combustion.

[0015] (3) By setting up a collection plate, when the operator finds that the rotating shell can be easily rotated by rotating the rotating shell, the locking rod is inserted into the rotating shell again to lock the rotating shell and the rotating ring again. At this time, the rotating shell is rotated again to make the rotating shell rotate, and the contact plate will also start to rotate, thereby scraping off the oil or grease attached to the inner wall of the connector two. In this way, it is prevented that when a lot of grease accumulates inside the connector one, even if the connector one and the connector two are disassembled and reconnected, it is still impossible to completely seal.

[0016] (4) By setting up a rotating shell, when oil leaks, the leaked oil will enter the rotating shell. At this time, when the operator checks the oil supply pipe at the end of the work, he will find that there is oil in the oil inlet chamber. The operator can then check the oil supply pipe. In this way, it is prevented that a certain oil supply pipe leaks and then stops leaking, so that the operator fails to find the leak point, which leads to the leakage aggravated, resulting in a large amount of oil flowing out, causing the device to be frequently stopped for inspection, which affects the work efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the pilot valve of the present invention; Figure 3 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the overall structure of the conveying mechanism of the present invention; Figure 5 This is a schematic diagram of the overall distribution of the push plate of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle; Figure 7 This is a schematic diagram of the overall rotating mechanism of the present invention; Figure 8 This is a schematic diagram of the overall distribution of the contact plate of the present invention; Figure 9 This is a schematic diagram of the overall structure of the connecting plate of the present invention; Figure 10 This is a schematic diagram of the overall distribution of the driving mechanism of the present invention.

[0019] The attached diagram lists the components represented by each number as follows: In the diagram: 12. Oil tank; 13. Pilot valve; 14. Hydraulic directional valve; 15. Pump body; 16. Main control valve; 2. Conveying mechanism; 21. Conveying assembly; 211. Connecting pipe; 212. Oil delivery pipe; 22. Connecting assembly; 221. Connector 1; 222. Connector 2; 3. Rotating mechanism; 31. Rotating assembly; 311. Rotating shell; 312. Rotating ring; 313. Connecting plate; 32. Scraping assembly; 321. Contact plate; 322. Collecting plate; 4. Pushing mechanism; 41. Pushing assembly; 411. Push plate; 412. Oil inlet chamber; 42. Oil storage assembly; 421. Roller; 422. Suction plate; 423. Locking rod. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1, please refer to Figures 1-9This invention relates to a hydraulic system for a skid steer loader, comprising an oil tank 12, a pump body 15 fixedly connected to the top of the oil tank 12, a pilot valve 13 fixedly connected to the outer wall of the output end of the pump body 15, and a hydraulically controlled directional valve 14 fixedly connected to the top of the oil tank 12, and further comprising: Conveying mechanism 2 is installed on the outer wall of pilot valve 13. Conveying mechanism 2 includes a connecting pipe 211 fixedly connected to the top of pilot valve 13. Rotating mechanism 3 is installed on the outer wall of conveying mechanism 2, and rotating mechanism 3 includes rotating shell 311; The pushing mechanism 4 is installed on the inner wall of the rotating mechanism 3, and the pushing mechanism 4 includes a push plate 411; The operator starts the pump body 15 to allow the oil in the oil tank 12 to enter the pilot valve 13 and the hydraulic control directional valve 14.

[0022] Conveying mechanism 2 also includes: Conveying assembly 21 is installed on the outer wall of connecting pipe 211; Connecting component 22 is installed on the outer wall of conveying component 21; The operator installs the connecting component 22 onto the outer wall of the conveying component 21.

[0023] Example 2, please refer to Figures 2-10 This invention relates to a working hydraulic system for a skid steer loader. Based on Embodiment 1, the rotating mechanism 3 further includes: Rotating component 31 is installed on the outer wall of connecting component 22; Scraping component 32 is installed on the outer wall of rotating component 31; When testing the airtightness of the device, the pushing mechanism 4 is pulled out and the rotating shell 311 is rotated. If it is difficult to rotate, the airtightness is good.

[0024] The four driving organizations include: Push component 41 is installed on the inner wall of rotating component 31; Oil storage component 42 is installed on the inner wall of push component 41; When the operator rotates the rotating shell 311, the pushing component 41 is pushed, causing the pushing component 41 to squeeze the oil storage component 42.

[0025] Delivery assembly 21 includes an oil delivery pipe 212 fixedly connected to the end of the connecting pipe 211 away from the pilot valve 13; The operator pushes the push rod on the machine to open the pilot valve 13, allowing the oil inside the pilot valve 13 to enter the oil supply pipe 212.

[0026] The connecting assembly 22 includes a connector 221 fixedly connected to the outer wall of the oil pipeline 212, and a connector 222 fixedly connected to the outer wall of the oil pipeline 212. The operator connects the two oil pipelines 212 by connecting connector 1 221 and connector 222 to each other.

[0027] Rotating assembly 31 includes a rotating ring 312 rotatably connected to the outer wall of connector 222. Several connecting plates 313 are fixedly connected to the outer wall of the rotating ring 312. The end of the connecting plate 313 away from the rotating ring 312 is rotatably connected to the rotating shell 311. The rotating ring 312 has several holes on the side near connector 221. There is significant friction between the rotating ring 312 and connector 222. When the operator pulls out the oil storage assembly 42, they hold the outer wall of the rotating shell 311 and rotate it. At this time, the rotating ring 312 will not rotate, but the rotating shell 311 will start to rotate. By setting the rotating shell 311, when oil leaks, the leaked oil will enter the interior of the rotating shell 311. When the operator checks the oil supply pipe 212 at the end of the work, they will find that there is oil inside the oil inlet chamber 412. The operator can then check the oil supply pipe 212. This method prevents a leak in one oil supply pipe 212 from stopping, which would prevent the operator from finding the leak point, causing the leak to worsen and resulting in a large amount of oil flowing out, causing the device to stop frequently for inspection, and affecting work efficiency.

[0028] The scraping assembly 32 includes a plurality of collecting plates 322 fixedly connected to the rotating ring 312 on the side near the connector 221, and a contact plate 321 fixedly connected to the top of the collecting plate 322; The collecting plate 322 has several collecting holes inside. One end of the contact plate 321 is raised and contacts the inner wall of connector 221. When the operator has not removed the oil storage component 42, the contact plate 321 scrapes off the oil residue adhering to the inner wall of connector 221 by rotating the rotating shell 311. By setting the collecting plate 322, when the operator finds that the rotating shell 311 can be easily rotated, the rotating shell 311 and the rotating ring 312 are locked again. When the rotating shell 311 is rotated again, the contact plate 321 will also start to rotate, thereby scraping off the oil or oil residue adhering to the inner wall of connector 222. In this way, it is prevented that if a lot of oil residue accumulates inside connector 221, even if connector 221 and connector 222 are disassembled and reconnected, a complete seal cannot be achieved.

[0029] The push assembly 41 includes several oil inlet chambers 412 fixedly connected to the outer wall of the rotating ring 312, and several push plates 411 whose ends are away from the rotating ring 312 are fixedly connected to the side of the rotating shell 311 close to the rotating ring 312. Among them, a pushing component 41 is provided between every two connecting plates 313. The operator rotates the rotating shell 311 to make the pushing plate 411 squeeze the oil storage component 42, causing the oil storage component 42 to tend to move backward.

[0030] The oil storage assembly 42 includes a suction plate 422 that is slidably connected to the inner wall of the oil inlet chamber 412. A roller 421 is rotatably connected to the side of the suction plate 422 away from the rotating ring 312. A locking rod 423 is slidably connected to the inner wall of the rotating shell 311. When the locking rod 423 is not pulled out, the operator rotates the rotating shell 311 to scrape the oil droplets inside the connector 221 by the contact plate 321. The oil droplets then enter the oil inlet chamber 412 through the collection plate 322. By setting the push plate 411, when the operator tests the oil pipe 212, by pulling out the locking rod 423 and then rotating the rotating shell 311, the push plate 411 will apply a pushing force to the suction plate 422, causing the suction plate 422 to move away from the connector 221. If the device has good airtightness, the operator will feel a large resistance generated during the rotation of the rotating shell 311, making it difficult for the operator to rotate. At this time, the airtightness between the oil pipes 212 is good. If the operator can easily rotate the rotating shell 311, it proves that the airtightness between the oil pipes 212 is poor. By using this method to check the airtightness of the oil pipe 212, no external testing tools are required, thus improving the testing efficiency.

[0031] One specific application of this embodiment is as follows: When work begins, the operator first starts the device to make the pump body 15 start working. The operator then pushes the control lever inside the device to open the pilot valve 13, thereby allowing the oil in the oil tank 12 to start being transported. When the signal is transmitted to the external control port of the hydraulic directional valve 14, the pressure signal is transmitted to the upper position, and the hydraulic directional valve 14 is pushed to the upper position to work. At this time, one of the two oil circuits inside the hydraulic directional valve 14 outputs in reverse and returns to the oil tank 12, while the other oil circuit outputs in the forward direction. At this time, the hydraulic directional valve 14 only outputs in the forward direction, and the loader can be used for one-way attachment work.

[0032] To switch to a two-way attachment, the operator uses a lever to transmit a signal from the pilot oil to the pilot valve 13. When the signal is transmitted to the external control port of the hydraulic directional valve 14, the pressure signal is transmitted to the upper position. At this time, the hydraulic directional valve 14 is pushed to the upper position for operation. Meanwhile, the pipeline in the hydraulic system is circulated, and the reverse output oil circuit is connected to the main control valve 16, thus enabling normal forward and reverse bidirectional operation. The switch is then complete.

[0033] By continuously switching the hydraulic control directional valve 14 as described above, the loader can freely switch between one-way and two-way attachments.

[0034] When installing the oil pipeline 212, connector 1 221 needs to be fixed to the oil pipeline 212 first, and then connector 222 needs to be fixed to another oil pipeline 212. Then, connector 222 is connected to connector 1 221. When the pipeline connection is complete, if the operator needs to check the seal between the two oil pipelines 212, first pull out the locking rod 423 to unlock the rotating housing 311. The operator can then rotate the rotating housing 311, causing the push plate 411 to contact the roller 421. At this time, the thrust of the rotating housing 311 will be applied to the suction plate 422, causing the suction plate 422 to move away from the connector 221. At this time, the suction plate 422 will generate a suction force inside the oil inlet chamber 412. If the oil pipes 212 are completely sealed, the suction plate 422 will not be able to move backward. The operator can feel the large resistance generated when rotating the rotating housing 311, making it difficult for the operator to rotate the rotating housing 311. If the seal between the two oil pipes 212 is poor, the operator can easily rotate the rotating housing 311.

[0035] When the device is supplying oil, if oil flows out from the gap between connector 1 221 and connector 2 222, it will come into contact with the contact plate 321. At this time, the oil will slide down the outer wall of the contact plate 321 into the hole inside the collection plate 322. Then, the oil inside the collection plate 322 will enter the oil inlet chamber 412. After the operator finishes the work, he can check the oil supply pipe 212 by rotating the rotating shell 311. If the rotating shell 311 can rotate easily, it proves that the airtightness is insufficient. At this time, the locking rod 4 should be locked first. 23. Insert the rotating shell 311 into the inner wall again to lock the rotating shell 311 and the rotating ring 312 again. Rotate the rotating shell 311 again. At this time, the rotating ring 312 and the contact plate 321 will start to rotate. During the rotation, the contact plate 321 will squeeze the oil and grease on the inner wall of connector 1 221. At this time, the squeezed oil and grease will flow out from the gap between connector 222 and connector 1 221 during the rotation. Then, separate connector 1 221 and connector 222.

[0036] By setting the push plate 411, when the operator inspects the oil pipeline 212, by pulling out the locking rod 423 and then rotating the rotating shell 311, the push plate 411 will apply a pushing force to the suction plate 422, causing the suction plate 422 to move away from the connector 221. If the device has good airtightness, the operator will feel a large resistance generated during the rotation of the rotating shell 311, making it difficult for the operator to rotate. At this time, the airtightness between the oil pipelines 212 is good. If the operator can easily rotate the rotating shell 311, it proves that the airtightness between the oil pipelines 212 is poor. By using this method to check the airtightness of the oil pipeline 212, no external testing tools are required, thus improving the testing efficiency.

[0037] By setting the contact plate 321, when oil leaks from between connector 222 and connector 121, the leaked oil will enter the position of the contact plate 321. When the oil comes into contact with the contact plate 321, it will slide down the surface of the contact plate 321 and finally come into contact with the hole on the collection plate 322. When a large amount of liquid flows out, the liquid will enter the oil inlet chamber 412 through the hole on the collection plate 322. In this way, it is prevented that when a large amount of oil leaks out from the gap between connector 222 and connector 121, the oil droplets will evaporate when exposed to high temperature and form flammable oil mist, thus posing a risk of combustion.

[0038] By setting up the collection plate 322, when the operator finds that the rotating shell 311 can be easily rotated by rotating it, the locking rod 423 is inserted into the rotating shell 311 again, so that the rotating shell 311 and the rotating ring 312 are locked again. At this time, the rotating shell 311 is rotated again, and the contact plate 321 will also start to rotate, thereby scraping off the oil or grease adhering to the inner wall of the second connector 222. In this way, it is prevented that if a lot of grease accumulates inside the first connector 221, even if the first connector 221 and the second connector 222 are disassembled and reconnected, it will still not be completely sealed.

[0039] By setting up a rotating housing 311, when oil leaks, the leaked oil will enter the rotating housing 311. At this time, when the operator checks the oil supply pipe 212 at the end of the work, he will find that there is oil inside the oil inlet chamber 412. The operator can then check the oil supply pipe 212. This method prevents a leak in one oil supply pipe 212 from stopping, which would prevent the operator from failing to find the leak point, causing the leak to worsen, resulting in a large amount of oil flowing out, frequent shutdowns of the equipment for inspection, and affecting work efficiency.

[0040] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A working hydraulic system for a skid steer loader, comprising an oil tank (12), a pump body (15) fixedly connected to the top of the oil tank (12), a pilot valve (13) fixedly connected to the outer wall of the output end of the pump body (15), and a hydraulically controlled directional valve (14) fixedly connected to the top of the oil tank (12), characterized in that, Also includes: The conveying mechanism (2) is installed on the outer wall of the pilot valve (13) and includes a connecting pipe (211) fixedly connected to the top of the pilot valve (13). Rotating mechanism (3), the rotating mechanism (3) is installed on the outer wall of the conveying mechanism (2), the rotating mechanism (3) includes a rotating shell (311); A pushing mechanism (4) is installed on the inner wall of the rotating mechanism (3), and the pushing mechanism (4) includes a push plate (411). The operator starts the pump body (15) to allow the oil in the oil tank (12) to enter the pilot valve (13) and the hydraulic control directional valve (14).

2. The working hydraulic system of a skid steer loader according to claim 1, characterized in that: The conveying mechanism (2) further includes: A conveying assembly (21) is installed on the outer wall of the connecting pipe (211); A connecting component (22) is installed on the outer wall of the conveying component (21); The operator installs the connecting component (22) onto the outer wall of the conveying component (21).

3. The working hydraulic system of a skid steer loader according to claim 2, characterized in that: The rotating mechanism (3) further includes: Rotating assembly (31), the rotating assembly (31) is installed on the outer wall of the connecting assembly (22); A scraping assembly (32) is mounted on the outer wall of the rotating assembly (31); When testing the airtightness of the device, the push mechanism (4) is pulled out and the rotating shell (311) is rotated. If it is difficult to rotate, the airtightness is good.

4. The working hydraulic system of a skid steer loader according to claim 3, characterized in that: The driving body (4) includes: A pushing component (41) is installed on the inner wall of the rotating component (31); An oil storage assembly (42) is installed on the inner wall of the push assembly (41); When the operator rotates the rotating shell (311), the pushing component (41) is pushed, causing the pushing component (41) to squeeze the oil storage component (42).

5. The working hydraulic system of a skid steer loader according to claim 4, characterized in that: The delivery assembly (21) includes an oil delivery pipe (212) fixedly connected to the end of the connecting pipe (211) away from the pilot valve (13). In this process, the operator pushes the push rod on the machine to open the pilot valve (13), allowing the oil inside the pilot valve (13) to enter the oil delivery pipe (212).

6. The working hydraulic system of a skid steer loader according to claim 5, characterized in that: The connecting assembly (22) includes a connector one (221) fixedly connected to the outer wall of the oil pipeline (212), and a connector two (222) fixedly connected to the outer wall of the oil pipeline (212). The operator connects the two oil pipelines (212) by connecting connector one (221) and connector two (222) to each other.

7. The working hydraulic system of a skid steer loader according to claim 6, characterized in that: The rotating assembly (31) includes a rotating ring (312) rotatably connected to the outer wall of connector two (222). Several connecting plates (313) are fixedly connected to the outer wall of the rotating ring (312). The end of the connecting plate (313) away from the rotating ring (312) is rotatably connected to the rotating shell (311). Among them, the rotating ring (312) has several holes on the side near the connector one (221). There is a large friction between the rotating ring (312) and the connector two (222). When the operator pulls out the oil storage component (42), he holds the outer wall of the rotating shell (311) and rotates it. At this time, the rotating ring (312) will not rotate, but the rotating shell (311) will start to rotate.

8. The working hydraulic system of a skid steer loader according to claim 7, characterized in that: The scraping assembly (32) includes a plurality of collecting plates (322) fixedly connected to the rotating ring (312) on the side near the connector (221), and a contact plate (321) is fixedly connected to the top of the collecting plate (322). The collecting plate (322) has several collecting holes inside. One end of the contact plate (321) is raised and will contact the inner wall of the connector (221). When the operator does not pull out the oil storage component (42), the contact plate (321) scrapes off the oil stains attached to the inner wall of the connector (221) by rotating the rotating shell (311).

9. The working hydraulic system of a skid steer loader according to claim 7, characterized in that: The pushing assembly (41) includes several oil inlet chambers (412) fixedly connected to the outer wall of the rotating ring (312), and the ends of several push plates (411) away from the rotating ring (312) are fixedly connected to the side of the rotating shell (311) close to the rotating ring (312). Between each pair of connecting plates (313), there is a pushing component (41). The operator rotates the rotating shell (311) to make the pushing plate (411) squeeze the oil storage component (42), causing the oil storage component (42) to tend to move backward.

10. The working hydraulic system of a skid steer loader according to claim 9, characterized in that: The oil storage assembly (42) includes a suction plate (422) slidably connected to the inner wall of the oil inlet chamber (412), a roller (421) is rotatably connected to the side of the suction plate (422) away from the rotating ring (312), and a locking rod (423) is slidably connected to the inner wall of the rotating shell (311). When the locking rod (423) is not pulled out, the operator can use the rotating shell (311) to scrape the oil droplets inside the connector (221) by the contact plate (321), so that the oil droplets enter the oil inlet chamber (412) through the collection plate (322).

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