External self-sealing oil suction filter for tractor and tractor

Abstract

This utility model relates to an external self-sealing oil filter for tractors and the tractor itself, belonging to the field of filters. It includes: an external protective housing, a self-sealing mechanism, and a filter element; both the self-sealing mechanism and the filter element are housed within the external protective housing. The self-sealing mechanism includes: a self-sealing valve, a self-sealing valve flap, and a movable connecting assembly. The self-sealing valve flap is sealed and fitted onto the self-sealing valve. The self-sealing valve and the self-sealing valve flap are slidably connected by the movable connecting assembly. The self-sealing valve flap has an oil outlet on its side wall, and the self-sealing valve flap has an oil port on its side wall. The filter element abuts against the self-sealing valve flap, and the self-sealing valve flap slides towards each other, with the oil outlet of the self-sealing valve flap communicating with the oil port of the self-sealing valve flap. Alternatively, the filter element can be separated from the self-sealing valve flap, and the self-sealing valve flap and the self-sealing valve flap can be moved away from each other by the movable connecting assembly, disconnecting the oil outlet of the self-sealing valve flap from the oil port of the self-sealing valve flap. This utility model is simple to operate and reduces the daily maintenance costs of the external self-sealing oil filter.

Description

Technical Field

[0001] This utility model relates to the field of filters, and in particular to an external self-sealing oil suction filter for tractors and a tractor. Background Technology

[0002] With the implementation of land transfer policies leading to increased large-scale farmland operations, tractors, with their high operating efficiency, can meet the needs of large-scale farmland cultivation, sowing, and harvesting. Users are not only demanding higher levels of intelligence from tractors, but also requiring greater ease of maintenance for tractor hydraulic components. Currently, most tractor hydraulic systems use the same hydraulic oil as the transmission chassis. During the maintenance of the hydraulic system's suction filter element, a significant amount of oil is often wasted, polluting the land and increasing maintenance costs for users.

[0003] Oil suction filters come in two types: internal and external. Internal filters must be submerged in the oil tank, often resulting in a larger tank size or, without changing the tank's volume, a smaller hydraulic oil capacity. External filters, on the other hand, do not require a tank and can be installed anywhere on the tractor, simply connected to the tank via a pipe. Currently, there are two methods for replacing external oil suction filters used in tractors during routine maintenance: one where the filter element is sealed inside the housing, requiring removal of the housing from the filter holder and replacement of the filter element along with the housing; and another where the filter element is separate from the housing, requiring removal of the housing from the filter holder and replacement of the filter element inside. Both methods are cumbersome and labor-intensive; furthermore, chassis hydraulic fluid flows out through the filter inlet, resulting in significant fluid waste during replacement, leading to user complaints and substantial increases in routine maintenance costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an external self-sealing oil suction filter for tractors and a tractor, so as to solve the above-mentioned problem.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An external self-sealing oil suction filter for tractors includes: an external protective shell, a self-sealing mechanism, and a filter element; the self-sealing mechanism and the filter element are both disposed within the external protective shell; the self-sealing mechanism includes: a self-sealing valve, a self-sealing valve valve, and a movable connecting assembly, the self-sealing valve valve being sealed and fitted onto the self-sealing valve valve, the self-sealing valve valve and the self-sealing valve valve being slidably connected via the movable connecting assembly, the self-sealing valve valve being connected to the external protective shell... The inner wall of the protective shell is fixedly connected. The side wall of the self-sealing valve is provided with a self-sealing valve oil outlet, and the side wall of the self-sealing valve is provided with a self-sealing valve oil port. The filter element abuts against the self-sealing valve, and the self-sealing valve and the self-sealing valve slide towards each other. The oil outlet of the self-sealing valve is connected to the oil port of the self-sealing valve. Alternatively, the filter element is separated from the self-sealing valve, and the self-sealing valve and the self-sealing valve move away from each other under the action of the movable connecting assembly. The oil outlet of the self-sealing valve is disconnected from the oil port of the self-sealing valve.

[0006] The beneficial effects of this utility model are as follows: Compared with the existing external suction filter replacement scheme, this utility model, by setting a self-sealing mechanism and utilizing the sliding sealing connection between the self-sealing valve and the self-sealing valve, facilitates the relative sliding between the self-sealing valve and the self-sealing valve during filter element replacement and installation. This adjusts the positional relationship between the oil outlet of the self-sealing valve on the side wall of the self-sealing valve and the oil port of the self-sealing valve on the side wall of the self-sealing valve. When the filter element is removed, the oil outlet of the self-sealing valve and the oil port of the self-sealing valve are disengaged, thus achieving self-sealing and preventing a large amount of hydraulic oil from flowing out of the filter inlet when the filter element is removed. When the filter element is installed, the oil outlet of the self-sealing valve and the oil port of the self-sealing valve are connected, enabling normal filtration after filter element installation. This reduces the daily maintenance cost of the external self-sealing suction filter. The self-sealing valve and the self-sealing valve are slidably connected by a movable connecting component, and the self-sealing valve abuts against the filter element, facilitating the relative sliding between the self-sealing valve and the self-sealing valve during filter element replacement, making operation simple.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the self-sealing valve has a hollow cylindrical structure, with a self-sealing valve inlet at one end. Both the self-sealing valve inlet and outlet are through holes. A stop platform is fixedly sleeved on one side wall of the self-sealing valve. The self-sealing valve is slidably sealed on the other end of the self-sealing valve. One end of the self-sealing valve is fixedly connected to the inner wall of the external protective housing.

[0009] The beneficial effects of adopting the above-mentioned further solution are: the oil inlet of the self-sealing valve is conducive to inputting external hydraulic oil into the self-sealing mechanism, and outputting hydraulic oil to the filter element for filtration in the non-self-sealing state, and preventing hydraulic oil from leaking out of the self-sealing mechanism in the self-sealing state, and the stop platform is conducive to providing a limit for the sliding of the self-sealing valve.

[0010] Furthermore, the self-sealing valve has a hollow cylindrical structure, and a self-sealing valve sleeve hole is provided at one end of the self-sealing valve. Both the self-sealing valve sleeve hole and the self-sealing valve oil port are through holes. One end of the self-sealing valve is slidably sealed and fitted onto the other end of the self-sealing valve. An abutment platform is fixedly fitted onto the side wall of one end of the self-sealing valve. The filter element is fitted onto the self-sealing valve and abuts against the abutment platform.

[0011] The beneficial effects of adopting the above-mentioned further solution are: the self-sealing valve sleeve hole facilitates the sliding of the self-sealing valve onto the self-sealing valve, and the abutment platform, by abutting against the filter element, facilitates the convenience of filter element replacement and installation, while simultaneously driving the self-sealing valve to slide on the self-sealing valve.

[0012] Furthermore, the movable connection assembly includes: a fixing screw, a self-sealing spring, a first locking nut, and a second locking nut. The self-sealing spring is sleeved on the fixing screw, and its two ends are fixedly connected to or abut against the inner wall of the other end of the self-sealing valve and the outer wall of the other end of the self-sealing valve, respectively. One end of the fixing screw is fixedly connected to the other end of the self-sealing valve, and its other end is slidably engaged with the other end of the self-sealing valve. The first locking nut and the second locking nut are fixedly sleeved on both ends of the fixing screw, and the first locking nut is fixedly connected to the inner wall of the other end of the self-sealing valve. The filter element abuts against the self-sealing valve, and the self-sealing valve and the self-sealing valve slide towards each other. The abutting platform abuts against the stop platform. Alternatively, the filter element may separate from the self-sealing valve, and the self-sealing valve and the self-sealing valve may move away from each other under the elastic force of the self-sealing spring. The second locking nut abuts against the outer wall of the other end of the self-sealing valve.

[0013] The beneficial effects of adopting the above-mentioned further solution are as follows: the fixing screw and the first locking nut are both fixedly connected to the end of the self-sealing valve away from the oil inlet of the self-sealing valve, which is conducive to providing support for the sliding of the self-sealing valve on the self-sealing valve. The self-sealing spring is conducive to driving the self-sealing valve to slide on the self-sealing valve through the rebound force after the filter element is removed, thereby achieving the closure of the oil outlet of the self-sealing valve. When the abutting platform abuts against the stop platform, it is conducive to limiting the sliding of the self-sealing valve. At the same time, the oil outlet of the self-sealing valve is connected to the oil port of the self-sealing valve, which is conducive to ensuring smooth oil passage and providing hydraulic oil for the operation of the filter element. The second locking nut abuts against the outer wall of the other end of the self-sealing valve, which is conducive to limiting the sliding of the self-sealing valve. At the same time, the inner wall of the self-sealing valve is sealed and covered to cover the oil outlet of the self-sealing valve, which is conducive to achieving self-sealing when the filter element is removed and avoiding leakage of hydraulic oil during the replacement of the filter element.

[0014] Furthermore, the external protective housing includes: a left end cover, a middle housing, and a right end cover. The left end cover and the right end cover are respectively fixedly installed at both ends of the middle housing by locking bolts, and the self-sealing valve is fixedly installed on the left end cover.

[0015] The beneficial effect of adopting the above-mentioned further solution is that the self-sealing valve is fixedly installed on the left end cover, which is conducive to providing support for the sliding connection between the self-sealing valve and the self-sealing valve.

[0016] Furthermore, it also includes an adjustment mechanism that is movably inserted through the external protective housing and connected to the filter element.

[0017] The beneficial effect of adopting the above-mentioned further solution is that the adjustment mechanism is conducive to driving the filter element to move within the intermediate housing, thereby adjusting the relative position between the self-sealing valve and the self-sealing gate.

[0018] Furthermore, the adjustment mechanism is a bolt, which is threadedly connected to the right end cover. The adjustment mechanism passes through the right end cover and abuts against the filter element.

[0019] The beneficial effect of adopting the above-mentioned further solution is that the adjustment mechanism passes through the right end cover and abuts against the filter element, which is conducive to driving the filter element to move by turning the adjustment mechanism, thereby driving the self-sealing valve to slide on the self-sealing valve.

[0020] Furthermore, it also includes a chassis hydraulic oil tank, and the left end cover is provided with a housing oil inlet, which is a through hole communicating with the self-sealing valve. The housing oil inlet is connected to the chassis hydraulic oil tank through a pipe.

[0021] The beneficial effects of adopting the above-mentioned further solution are: the oil inlet of the housing facilitates the delivery of hydraulic oil from the chassis hydraulic oil tank to the self-sealing valve through the pipeline, and then to the filter element for filtration, while working with the pump to achieve the filtration and circulation of hydraulic oil.

[0022] Furthermore, it also includes a pump, and the side wall of the external protective housing is provided with a connecting oil port, which is a tubular structure communicating with the external protective housing, and the connecting oil port is connected to the pump through a pipe.

[0023] The beneficial effect of adopting the above-mentioned further solution is that the oil port is connected to the pump through a pipeline, which is conducive to driving the circulation of hydraulic oil, thereby achieving the filtration of hydraulic oil.

[0024] Another technical solution of this utility model to solve the above-mentioned technical problems is as follows: a tractor, including the above-mentioned external self-sealing oil suction filter for tractors.

[0025] The beneficial effects of this utility model are: it facilitates the use of external self-sealing oil suction filters in different similar tractors, resulting in lower maintenance costs and more convenient operation for the oil suction filter element of the tractor hydraulic system. Attached Figure Description

[0026] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0027] Figure 2 This is a cross-sectional view of the overall structure of the filter element in its unsealed state before maintenance, as provided in an embodiment of the present invention.

[0028] Figure 3 A cross-sectional view of the overall structure of the filter element in a self-sealing state during maintenance, as provided in this embodiment of the utility model;

[0029] Figure 4 A cross-sectional view of the self-sealing mechanism in a self-sealing state during filter element maintenance, provided in an embodiment of this utility model;

[0030] Figure 5 A cross-sectional view of the self-sealing mechanism in an unsealed state before filter element maintenance, provided in an embodiment of this utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the self-sealing valve provided in an embodiment of the present utility model;

[0032] Figure 7 A schematic diagram of the structure of the self-sealing door provided in an embodiment of this utility model;

[0033] Figure 8 This is a schematic diagram of the structure of the active connection component provided in an embodiment of the present utility model.

[0034] in, Figure 1 The double-headed arrows indicate the installation positions of each component. This utility model is also used in accordance with... Figure 1 Place it in the direction indicated by the double-headed arrow; Figure 2 and Figure 3 The arrows in the diagram indicate the direction of hydraulic oil displacement.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. External protective housing; 2. Self-sealing mechanism; 3. Filter element; 4. Adjustment mechanism; 5. Chassis hydraulic oil tank; 6. Pump; 11. Left end cover; 12. Middle housing; 13. Right end cover; 14. Locking bolt; 21. Self-sealing valve; 22. Self-sealing valve valve; 23. Movable connection assembly; 31. Bypass valve; 111. Housing oil inlet; 121. Connection oil port; 211. Self-sealing valve oil inlet; 212. Self-sealing valve oil outlet; 213. Stop platform; 221. Self-sealing valve oil port; 222. Abutment platform; 223. Self-sealing valve sleeve hole; 231. Fixing screw; 232. Self-sealing spring; 233. First locking nut; 234. Second locking nut. Detailed Implementation

[0037] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0038] like Figures 1 to 8 As shown, this embodiment provides an external self-sealing oil filter for tractors, including: an external protective housing 1, a self-sealing mechanism 2, and a filter element 3; both the self-sealing mechanism 2 and the filter element 3 are disposed within the external protective housing 1; the self-sealing mechanism 2 includes: a self-sealing valve 21, a self-sealing valve 22, and a movable connecting assembly 23, the self-sealing valve 22 being sealed and fitted onto the self-sealing valve 21, the self-sealing valve 21 and the self-sealing valve 22 being slidably connected via the movable connecting assembly 23, and the self-sealing valve 21 being fixedly connected to the inner wall of the external protective housing 1. The self-sealing valve 21 has a self-sealing valve outlet 212 on its side wall, and the self-sealing valve 22 has a self-sealing valve inlet 221 on its side wall. The filter element 3 abuts against the self-sealing valve 22, and the self-sealing valve 21 and the self-sealing valve 22 slide towards each other. The self-sealing valve outlet 212 is connected to the self-sealing valve inlet 221. Alternatively, the filter element 3 is separated from the self-sealing valve 22, and the self-sealing valve 21 and the self-sealing valve 22 move away from each other under the action of the movable connecting assembly 23. The self-sealing valve outlet 212 is disconnected from the self-sealing valve inlet 221.

[0039] It should be noted that, in the technical solution of this utility model, the filter element 3 is provided with a bypass valve 31, such as... Figure 2 and Figure 3As shown, the bypass valve 31 is a protective device inside the filter element 3. When the filter element 3 is blocked, the bypass valve 31 will open. The bypass valve 31 is existing technology in the field, so its connection relationship with the filter element 3 is not described in detail in this application.

[0040] The sealing between the self-sealing valve 21 and the self-sealing valve 22 (i.e., hydraulic oil will not leak through the self-sealing valve 21 and the self-sealing valve 22) can be achieved in at least two ways: First, when the self-sealing valve 22 is fitted onto the self-sealing valve 21, the inner diameter of the self-sealing valve 22 is adapted to the outer diameter of the self-sealing valve 21, so that the two can slide relative to each other while ensuring sealing performance through size; Second, a sealing ring is provided between the self-sealing valve 21 and the self-sealing valve 22, which can ensure sealing performance between the self-sealing valve 21 and the self-sealing valve 22 without hindering relative sliding between them.

[0041] In a preferred embodiment of the present invention, there are multiple self-sealing valve oil outlets 212 and multiple self-sealing valve oil outlets 221, and the multiple self-sealing valve oil outlets 212 are circumferentially spaced around the side wall of the self-sealing valve 21, and the multiple self-sealing valve oil outlets 221 are circumferentially spaced around the side wall of the self-sealing valve 22.

[0042] The beneficial effects of this embodiment are as follows: Compared with the existing external suction filter replacement scheme, this utility model, by setting a self-sealing mechanism and utilizing the sliding sealing sleeve between the self-sealing valve and the self-sealing valve, facilitates the relative sliding between the self-sealing valve and the self-sealing valve during filter element replacement and installation. This adjusts the positional relationship between the oil outlet of the self-sealing valve on the side wall of the self-sealing valve and the oil port of the self-sealing valve on the side wall of the self-sealing valve. When the filter element is removed, the oil outlet of the self-sealing valve and the oil port of the self-sealing valve are disconnected, thus achieving self-sealing and preventing a large amount of hydraulic oil from flowing out of the filter inlet when the filter element is removed. When the filter element is installed, the oil outlet of the self-sealing valve and the oil port of the self-sealing valve are connected, enabling normal filtration after filter element installation. This reduces the daily maintenance cost of the external self-sealing suction filter. The self-sealing valve and the self-sealing valve are slidably connected by a movable connecting component, and the self-sealing valve abuts against the filter element, facilitating the relative sliding between the self-sealing valve and the self-sealing valve during filter element replacement, making the operation simple.

[0043] Preferred, such as Figures 4 to 6As shown, the self-sealing valve 21 has a hollow cylindrical structure. One end of the self-sealing valve 21 is provided with a self-sealing valve inlet 211. Both the self-sealing valve inlet 211 and the self-sealing valve outlet 212 are through holes. A stop platform 213 is fixedly sleeved on one side wall of the self-sealing valve 21. The self-sealing valve 22 is slidably and sealingly sleeved on the other end of the self-sealing valve 21. One end of the self-sealing valve 21 is fixedly connected to the inner wall of the external protective housing 1.

[0044] The advantages of adopting the above preferred solution are: the oil inlet of the self-sealing valve is conducive to inputting external hydraulic oil into the self-sealing mechanism, and outputting hydraulic oil to the filter element for filtration in the non-self-sealing state, and preventing hydraulic oil from leaking out of the self-sealing mechanism in the self-sealing state, and the stop platform is conducive to providing a limit for the sliding of the self-sealing valve.

[0045] Preferred, such as Figure 4 , Figure 5 and Figure 7 As shown, the self-sealing valve 22 has a hollow cylindrical structure. One end of the self-sealing valve 22 is provided with a self-sealing valve sleeve hole 223. Both the self-sealing valve sleeve hole 223 and the self-sealing valve oil port 221 are through holes. One end of the self-sealing valve 22 is slidably sealed and fitted onto the other end of the self-sealing valve 21. An abutment platform 222 is fixedly fitted onto the side wall of one end of the self-sealing valve 22. The filter element 3 is fitted onto the self-sealing valve 22 and abuts against the abutment platform 222.

[0046] The advantages of adopting the above preferred solution are: the self-sealing valve sleeve hole facilitates the sliding of the self-sealing valve onto the self-sealing valve, and the abutment platform, by abutting against the filter element, facilitates the convenience of filter element replacement and installation, while simultaneously driving the self-sealing valve to slide on the self-sealing valve.

[0047] Preferred, such as Figure 2 , Figure 4 , Figure 5 and Figure 8As shown, the movable connection assembly 23 includes: a fixing screw 231, a self-sealing spring 232, a first locking nut 233, and a second locking nut 234. The self-sealing spring 232 is sleeved on the fixing screw 231, and its two ends are fixedly connected to or abut against the inner wall of the other end of the self-sealing valve 22 and the outer wall of the other end of the self-sealing valve 21, respectively. One end of the fixing screw 231 is fixedly connected to the other end of the self-sealing valve 21, and its other end is slidably engaged with the other end of the self-sealing valve 22. The first locking nut 233 and the second locking nut 234... The first locking nut 234 is fixedly sleeved on both ends of the fixing screw 231. The first locking nut 233 is fixedly connected to the inner wall of the other end of the self-sealing valve 21. The filter element 3 abuts against the self-sealing valve 22. The self-sealing valve 21 and the self-sealing valve 22 slide towards each other. The abutting platform 222 abuts against the stop platform 213. Alternatively, the filter element 3 is separated from the self-sealing valve 22. The self-sealing valve 21 and the self-sealing valve 22 move away from each other under the elastic force of the self-sealing spring 232. The second locking nut 234 abuts against the outer wall of the other end of the self-sealing valve 22.

[0048] It should be noted that in the technical solution of this utility model, one end of the fixing screw 231 is a stepped shaft, and the stepped surface on the stepped shaft of the fixing screw 231 abuts against the end face of the self-sealing valve 21 facing the self-sealing valve 22. One end of the fixing screw 231 is threadedly connected to the first locking nut 233. The first locking nut 233 and the stepped surface on the stepped shaft of the fixing screw 231 clamp the end wall of the self-sealing valve 21 between them, thereby realizing the fixed connection between one end of the fixing screw 231 and the other end of the self-sealing valve 21.

[0049] When the inner wall of the self-sealing valve 22 seals and covers the oil outlet 212 of the self-sealing valve, the inner wall of the self-sealing valve 22 and the outer wall of the self-sealing valve 21 still need to be sealed to prevent hydraulic oil from leaking out from between the inner wall of the self-sealing valve 22 and the outer wall of the self-sealing valve 21.

[0050] The advantages of adopting the above-mentioned preferred scheme are as follows: the fixing screw and the first locking nut are both fixedly connected to the end of the self-sealing valve away from the oil inlet of the self-sealing valve, which helps to provide support for the sliding of the self-sealing valve on the self-sealing valve. The self-sealing spring helps to drive the self-sealing valve to slide on the self-sealing valve through the rebound force after the filter element is removed, thereby closing the oil outlet of the self-sealing valve. When the abutting platform abuts against the stop platform, it helps to limit the sliding of the self-sealing valve. At the same time, the oil outlet of the self-sealing valve is connected to the oil port of the self-sealing valve, which helps to ensure smooth oil passage and provide hydraulic oil for the operation of the filter element. The second locking nut abuts against the outer wall of the other end of the self-sealing valve, which helps to limit the sliding of the self-sealing valve. At the same time, the inner wall of the self-sealing valve is sealed to cover the oil outlet of the self-sealing valve, which helps to achieve self-sealing when the filter element is removed and avoids leakage of hydraulic oil during the replacement of the filter element.

[0051] Preferred, such as Figures 1 to 3 As shown, the external protective housing 1 includes: a left end cover 11, a middle housing 12 and a right end cover 13. The left end cover 11 and the right end cover 13 are respectively fixedly installed at both ends of the middle housing 12 by locking bolts 14. The self-sealing valve 21 is fixedly installed on the left end cover 11.

[0052] It should be noted that in the preferred embodiment of this utility model, the self-sealing valve 21 is fixedly installed on the left end cover 11 by a threaded connection.

[0053] The advantages of adopting the above preferred solution are: the self-sealing valve is fixedly installed on the left end cover, which helps to provide support for the sliding connection between the self-sealing valve and the self-sealing valve.

[0054] Preferred, such as Figures 1 to 3 As shown, it also includes an adjustment mechanism 4, which is movably passed through the external protective housing 1 and connected to the filter element 3.

[0055] The advantages of adopting the above preferred solution are: the adjustment mechanism is conducive to driving the filter element to move within the intermediate housing, thereby adjusting the relative position between the self-sealing valve and the self-sealing gate.

[0056] Preferred, such as Figures 1 to 3 As shown, the adjustment mechanism 4 is a bolt, which is threadedly connected to the right end cover 13. The adjustment mechanism 4 passes through the right end cover 13 and abuts against the filter element 3.

[0057] It should be noted that the length of the adjusting mechanism 4 needs to meet the following condition: when the adjusting mechanism 4 is tightened until the head of the bolt abuts against the right end cover 13, the adjusting mechanism 4 pushes the filter element 3 to move, thereby pushing the self-sealing valve 22 to slide on the self-sealing valve 21. Figure 5The state shown is that the abutting platform 222 abuts against the stop platform 213, and at the same time, the multiple self-sealing valve oil outlets 212 are connected one-to-one with the multiple self-sealing valve oil outlets 221.

[0058] The advantages of adopting the above preferred solution are: the adjustment mechanism passes through the right end cover and abuts against the filter element, which is conducive to driving the filter element to move by turning the adjustment mechanism, thereby driving the self-sealing valve to slide on the self-sealing valve.

[0059] Preferred, such as Figure 2 and Figure 3 As shown, it also includes a chassis hydraulic oil tank 5. The left end cover 11 is provided with a housing oil inlet 111. The housing oil inlet 111 is a through hole that communicates with the self-sealing valve 21. The housing oil inlet 111 is connected to the chassis hydraulic oil tank 5 through a pipe.

[0060] It should be noted that the oil inlet 111 of the housing is connected to the oil inlet 211 of the self-sealing valve 21.

[0061] The advantages of adopting the above-mentioned preferred solution are: the oil inlet of the housing facilitates the delivery of hydraulic oil from the chassis hydraulic oil tank to the self-sealing valve through the pipeline, and then to the filter element for filtration, while working with the pump to achieve the filtration and circulation of hydraulic oil.

[0062] Preferred, such as Figure 2 and Figure 3 As shown, it also includes a pump 6. The side wall of the external protective housing 1 is provided with a connecting oil port 121. The connecting oil port 121 is a tubular structure that communicates with the external protective housing 1. The connecting oil port 121 is connected to the pump 6 through a pipe.

[0063] It should be noted that the self-sealing mechanism mentioned in this invention can only prevent hydraulic oil from leaking out of the self-sealing mechanism 2 during the replacement of the filter element 3. However, the hydraulic oil contained in or retained in the filter element 3, as well as the hydraulic oil retained in the pipeline connecting the oil port 121 and the pump 6, may still drip. This waste of hydraulic oil and potential soil pollution cannot be avoided, but containers can be used to collect the dripping hydraulic oil in a timely manner to minimize soil pollution.

[0064] The connecting oil port 121 is located on the side wall of the intermediate housing 12 and communicates with the intermediate housing 12.

[0065] The advantages of adopting the above-mentioned preferred solution are: the oil port is connected to the pump through a pipeline, which is conducive to driving the circulation of hydraulic oil, thereby achieving the filtration of hydraulic oil.

[0066] This utility model also provides a tractor, including the above-mentioned external self-sealing oil suction filter for tractors.

[0067] The beneficial effects of this embodiment are: it facilitates the use of external self-sealing suction filters in different similar tractors, resulting in lower maintenance costs and more convenient operation for the suction filter element of the tractor hydraulic system.

[0068] The operation process of this embodiment is described below:

[0069] like Figure 2 and Figure 5 As shown, this is the state of filter element 3 before maintenance. At this time, the head of the adjusting mechanism 4 abuts against the right end cover 13, the abutting platform 222 abuts against the stop platform 213, the self-sealing spring 232 is compressed, and at the same time, the oil outlets 212 of multiple self-sealing valves are connected to the oil ports 221 of multiple self-sealing valves. Under the action of the pump 6, the hydraulic oil in the chassis hydraulic oil tank 5 enters the self-sealing mechanism 2 through the pipeline, and enters the filter element 3 for filtration from the self-sealing mechanism 2. The filtered hydraulic oil is pumped to the pump 6 through the connecting oil port 121 and the pipeline, and then pumped to the external device by the pump 6.

[0070] like Figure 3 and Figure 4 As shown, this is the state of filter element 3 during maintenance. When filter element 3 needs to be replaced, first unscrew the adjustment mechanism 4 on the right end cover 13. During the unscrewing process, filter element 3 is no longer supported to the left, but is simultaneously subjected to the rebound force of the self-sealing spring 232, causing filter element 3 to shift to the right. At the same time, the self-sealing valve 22 will move to the right along with filter element 3. During this process, the self-sealing valve 22 slides to the right on the self-sealing valve 21, and the self-sealing valve oil port 221 on the self-sealing valve 22 and the self-sealing valve oil outlet 212 on the self-sealing valve 21 gradually become misaligned and separate. When the self-sealing valve 22 slides to the second locking nut 234 and the self-sealing valve 22... When the outer wall of the end away from the self-sealing valve socket 223 abuts, the inner wall of the self-sealing valve 22 seals and covers the oil outlet 212 of the self-sealing valve. At this time, since the self-sealing valve 21 is fixedly connected to the left end cover 11, the second locking nut 234 abuts against the outer wall of the end of the self-sealing valve 22 away from the self-sealing valve socket 223, and the fixing screw 231 and the first locking nut 233 are fixedly connected to the end of the self-sealing valve 21 away from the oil inlet 211 of the self-sealing valve, even if the self-sealing spring 232 still has a rebound force, it will not drive the self-sealing valve 22 to continue to slide to the right after the filter element 3 is removed, that is, the oil outlet 212 of the self-sealing valve will not be exposed after the filter element 3 is removed.

[0071] Then remove the right end cap 13 from the right end of the middle housing 12, take out the filter element 3 for replacement, and after replacement, abut the left end face of the new filter element 2 against the abutment platform 222.

[0072] Next, fix the right end cover 13 back to the right end of the middle housing 12 and tighten the adjustment mechanism 4. As the adjustment mechanism 4 is turned to the left, it drives the filter element 3 and the self-sealing valve 22 to move to the left together. During this process, the self-sealing spring 232 is compressed again until the head of the adjustment mechanism 4 abuts against the right end cover 13 again, the abutting platform 222 abuts against the stop platform 213 again, and the oil outlet 212 of the self-sealing valve and the oil outlet 221 of the self-sealing valve are connected again.

[0073] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0076] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0078] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An external self-sealing oil suction filter for tractors, characterized in that, include: An external protective housing (1), a self-sealing mechanism (2), and a filter element (3) are provided. The self-sealing mechanism (2) and the filter element (3) are both disposed inside the external protective housing (1). The self-sealing mechanism (2) includes a self-sealing valve (21), a self-sealing valve (22), and a movable connecting assembly (23). The self-sealing valve (22) is sealed and fitted onto the self-sealing valve (21). The self-sealing valve (21) and the self-sealing valve (22) are slidably connected through the movable connecting assembly (23). The self-sealing valve (21) is fixedly connected to the inner wall of the external protective housing (1). The side wall of the self-sealing valve (21) is provided with There is a self-sealing valve outlet (212), and a self-sealing valve port (221) is provided on the side wall of the self-sealing valve (22); the filter element (3) abuts against the self-sealing valve (22), the self-sealing valve (21) and the self-sealing valve (22) slide towards each other, the self-sealing valve outlet (212) is connected to the self-sealing valve port (221), or the filter element (3) is separated from the self-sealing valve (22), the self-sealing valve (21) and the self-sealing valve (22) move away from each other under the action of the movable connecting assembly (23), and the self-sealing valve outlet (212) is disconnected from the self-sealing valve port (221).

2. The external self-sealing oil suction filter for tractors according to claim 1, characterized in that, The self-sealing valve (21) has a hollow cylindrical structure. One end of the self-sealing valve (21) is provided with a self-sealing valve inlet (211). Both the self-sealing valve inlet (211) and the self-sealing valve outlet (212) are through holes. A stop platform (213) is fixedly sleeved on one side wall of the self-sealing valve (21). The self-sealing valve (22) is slidably and sealingly sleeved on the other end of the self-sealing valve (21). One end of the self-sealing valve (21) is fixedly connected to the inner wall of the external protective shell (1).

3. The external self-sealing oil suction filter for tractors according to claim 2, characterized in that, The self-sealing valve (22) is a hollow cylindrical structure. One end of the self-sealing valve (22) is provided with a self-sealing valve sleeve hole (223). The self-sealing valve sleeve hole (223) and the self-sealing valve oil port (221) are both through holes. One end of the self-sealing valve (22) is slidably sealed on the other end of the self-sealing valve (21). An abutment platform (222) is fixedly sleeved on one side wall of the self-sealing valve (22). The filter element (3) is sleeved on the self-sealing valve (22) and abuts against the abutment platform (222).

4. The external self-sealing oil suction filter for tractors according to claim 3, characterized in that, The movable connection assembly (23) includes: a fixing screw (231), a self-sealing spring (232), a first locking nut (233), and a second locking nut (234). The self-sealing spring (232) is sleeved on the fixing screw (231). The two ends of the self-sealing spring (232) are fixedly connected or abut against the inner wall of the other end of the self-sealing valve (22) and the outer wall of the other end of the self-sealing valve (21), respectively. One end of the fixing screw (231) is fixedly connected to the other end of the self-sealing valve (21), and its other end is slidably engaged with the other end of the self-sealing valve (22). The first locking nut (233) and the second locking nut (234) are fixedly sleeved on both ends of the fixing screw (231). The first locking nut (233) is fixedly connected to the inner wall of the other end of the self-sealing valve (21). The filter element (3) abuts against the self-sealing valve (22), the self-sealing valve (21) and the self-sealing valve (22) slide towards each other, the abutting platform (222) abuts against the stop platform (213), or the filter element (3) separates from the self-sealing valve (22), the self-sealing valve (21) and the self-sealing valve (22) move away from each other under the elastic force of the self-sealing spring (232), and the second locking nut (234) abuts against the outer wall of the other end of the self-sealing valve (22).

5. The external self-sealing oil filter for tractors according to claim 1, characterized in that, The external protective housing (1) includes: a left end cover (11), a middle housing (12) and a right end cover (13). The left end cover (11) and the right end cover (13) are respectively fixedly installed at both ends of the middle housing (12) by locking bolts (14), and the self-sealing valve (21) is fixedly installed on the left end cover (11).

6. The external self-sealing oil suction filter for tractors according to claim 5, characterized in that, It also includes an adjustment mechanism (4) that is movable through the external protective housing (1) and connected to the filter element (3).

7. The external self-sealing oil suction filter for tractors according to claim 6, characterized in that, The adjustment mechanism (4) is a bolt. The adjustment mechanism (4) is threadedly connected to the right end cover (13). The adjustment mechanism (4) passes through the right end cover (13) and abuts against the filter element (3).

8. The external self-sealing oil suction filter for tractors according to claim 5, characterized in that, It also includes a chassis hydraulic oil tank (5), and the left end cover (11) is provided with a housing oil inlet (111). The housing oil inlet (111) is a through hole that communicates with the self-sealing valve (21). The housing oil inlet (111) is connected to the chassis hydraulic oil tank (5) through a pipe.

9. A tractor-mounted self-sealing oil suction filter according to any one of claims 1-8, characterized in that, It also includes a pump (6), and the side wall of the external protective housing (1) is provided with a connecting oil port (121). The connecting oil port (121) is a tubular structure that communicates with the external protective housing (1). The connecting oil port (121) is connected to the pump (6) through a pipe.

10. A tractor, characterized in that, The tractor external self-sealing oil suction filter includes any one of claims 1-9.

Images