Bidirectional filter and tractor

Abstract

The application relates to the technical field of agricultural machinery, in particular to a bidirectional filter and a tractor. The bidirectional filter comprises an end cover, a one-way valve group and a filter piece, the filter piece is connected to the end cover, the one-way valve group comprises a first one-way valve and a second one-way valve arranged on the end cover; the end cover is formed with a first interface and a second interface, the first interface, the filter piece, the first one-way valve and the second interface sequentially communicate to form a first oil path, and the first interface, the second one-way valve and the second interface sequentially communicate to form a second oil path. The first one-way valve only allows oil from the first interface to pass, and the second one-way valve only allows oil from the second interface to pass. When used between the tractor and the matched machine tool, the first interface is connected to a hydraulic oil tank of the tractor, and the second interface is connected to a hydraulic system of the machine tool, so that when the tractor supplies oil to the machine tool, the oil needs to pass through the filter piece for filtration, and when the oil returns, the filter piece is not needed to pass through, thereby ensuring that the hydraulic system of the machine tool can stably and reliably work.

Description

Technical Field

[0001] This application relates to the field of agricultural machinery technology, and in particular to a two-way filter and a tractor. Background Technology

[0002] In agricultural machinery operations, tractors serve as a crucial power source, widely used for traction and driving various agricultural implements, such as seeders, plows, and harvesters. Tractors typically supply hydraulic oil to the hydraulic systems of these implements. However, the cleanliness of tractor oil varies considerably, potentially causing malfunctions in the implement's hydraulic system. Therefore, to protect the hydraulic system of the implements, a filter device needs to be installed in the hydraulic circuit to remove contaminants from the oil, ensuring stable and reliable operation of the implement's hydraulic system and extending the implement's service life. Utility Model Content

[0003] The purpose of this invention is to provide a two-way filter and a tractor, so as to ensure that the hydraulic system of the implement can work stably and reliably to a certain extent, and extend the service life of the implement.

[0004] This utility model provides a bidirectional filter, including an end cap and a filter element, wherein the filter element is connected to the end cap;

[0005] The end cap is provided with a first interface, a second interface, and a one-way valve group, wherein the one-way valve group includes a first one-way valve and a second one-way valve.

[0006] The first interface, the first check valve, the filter element, and the second interface are sequentially connected to form a first oil circuit, and the inlet of the first check valve faces the first interface;

[0007] The second interface, the second check valve, and the first interface are sequentially connected to form a second oil circuit, and the outlet of the second check valve faces the second interface.

[0008] Furthermore, the end cap is formed with a first valve chamber and a second valve chamber, the first valve chamber being connected to the first interface and the second valve chamber being connected to the second interface;

[0009] The filter element includes a filter element and a filter housing, with the filter housing fitted over the outside of the filter element;

[0010] The end cap has a first flow channel and a second flow channel. The first flow channel connects the filter shell and the first valve chamber, and the second flow channel connects the filter element and the second valve chamber.

[0011] The first one-way valve is installed in the first flow channel, and the outlet of the first one-way valve is connected to the filter housing, and the inlet of the first one-way valve is connected to the second valve chamber.

[0012] Furthermore, the end cap forms a partition between the first valve chamber and the second valve chamber, the second one-way valve is installed on the partition, and the inlet of the second one-way valve is connected to the second valve chamber, and the outlet of the second one-way valve is connected to the first valve chamber.

[0013] Furthermore, the end cap is provided with a first connecting portion, the open end of the filter element is adapted to be screwed into the first connecting portion, and the second flow channel passes through the first connecting portion to communicate with the interior of the filter element.

[0014] Furthermore, the end cap is provided with a second connecting portion, which is disposed around the outside of the first connecting portion;

[0015] The open end of the filter housing is adapted to be screwed onto the first connecting part, and the first flow channel forms a through hole on the end cap between the first connecting part and the second connecting part.

[0016] Furthermore, the filter element is provided with a drain port and a bypass valve for sealing the drain port at the end away from the end cap, and the bypass valve can open the drain port when the pressure inside the filter element reaches a preset value.

[0017] Furthermore, the filter housing is provided with a vent at the end away from the end cap, and a removable first sealing element is provided inside the vent.

[0018] Furthermore, the end cap is provided with a first detection port and a second detection port, the first detection port being connected to the first valve cavity and the second detection port being connected to the second valve cavity;

[0019] The first detection port and the second detection port are used to install a second sealing component or a pressure detection component.

[0020] Furthermore, there are multiple filter elements arranged at intervals, and the end cap is configured with the first interface, the second interface and the one-way valve assembly for each filter element.

[0021] This utility model also provides a tractor that includes the bidirectional filter described in any of the above claims.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] The bidirectional filter provided by this utility model includes an end cap, a one-way valve assembly, and a filter element. The filter element is connected to the end cap. The one-way valve assembly includes a first one-way valve and a second one-way valve disposed on the end cap. The end cap has a first interface and a second interface, which are used to connect to an external oil circuit. The first interface, the filter element, the first one-way valve, and the second interface are sequentially connected to form a first oil circuit, and the first interface, the second one-way valve, and the second interface are sequentially connected to form a second oil circuit. The installation direction of the first one-way valve allows oil from the first interface to pass through, and the installation direction of the second one-way valve allows oil from the second interface to pass through.

[0024] In practical applications, such as between tractors and their implements, the first interface connects to the tractor's hydraulic oil tank via a pipeline, while the second interface connects to the implement's hydraulic system (e.g., the rodless chamber of a cylinder) via a pipeline. Therefore, when the tractor supplies oil to the implement's hydraulic system, the oil flows through the first oil path, is filtered by a filter, and then flows into the implement's hydraulic system. Meanwhile, the return oil from the hydraulic system returns directly to the tractor via the second oil path without filtration. This ensures stable and reliable operation of the implement's hydraulic system, extending the service life of both the hydraulic system and the implement.

[0025] This utility model also provides a tractor that includes the aforementioned bidirectional filter, thus the tractor also has the beneficial effects of a bidirectional filter. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of the bidirectional filter from a first-view perspective, provided in an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the structure of the bidirectional filter from a second perspective, provided in an embodiment of the present invention.

[0029] Figure 3 This is a schematic diagram of the structure of a bidirectional filter with dual filter elements provided in an embodiment of the present invention.

[0030] Figure label:

[0031] 1-End cap, 11-First interface, 12-Second interface, 13-First valve chamber, 14-Second valve chamber, 15-First flow channel, 16-Second flow channel, 17-Second sealing element;

[0032] 2-Filter element, 21-Filter cartridge, 22-Filter housing, 23-Bypass valve, 24-First sealing element;

[0033] 3-First check valve, 4-Second check valve. Detailed Implementation

[0034] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0035] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0036] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 do not 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0039] The following reference Figures 1 to 3 This application describes a bidirectional filter and a tractor according to some embodiments thereof.

[0040] This application provides a bidirectional filter, such as Figure 1 and Figure 2 As shown, the bidirectional filter includes an end cap 1, a one-way valve assembly, and a filter element 2. The filter element 2 is connected to the end cap 1. The one-way valve assembly includes a first one-way valve 3 and a second one-way valve 4 disposed on the end cap 1. The end cap 1 has a first interface 11 and a second interface 12. The first interface 11 and the second interface 12 are used to connect to an external oil circuit. The first interface 11, the first one-way valve 3, the filter element 2, and the second interface 12 are sequentially connected to form a first oil circuit. The second interface 12, the second one-way valve 4, and the first interface 11 are sequentially connected to form a second oil circuit.

[0041] The installation direction of the first check valve 3 allows oil from the first port 11 to pass through only, and the installation direction of the second check valve 4 allows oil from the second port 12 to pass through only. In other words, oil flowing in from the first port 11 can only flow out from the second port 12 after being filtered by the filter element 2 along the first oil path, and cannot flow out directly from the second port 12 through the second oil path. At the same time, oil flowing in from the second port 12 can only flow out directly from the first port 11 along the second oil path, and cannot flow out from the first port 11 after being filtered by the filter element 2 along the first oil path.

[0042] In practical applications, such as between tractors and their implements, the first interface 11 is used to connect to the tractor's hydraulic oil tank via a pipeline, and the second interface 12 is used to connect to the implement's hydraulic system (such as the rodless chamber of a cylinder) via a pipeline. Therefore, when the tractor supplies oil to the implement's hydraulic system, the oil flows into the implement's hydraulic system after being filtered by the filter element 2 along the first oil path, while the return oil from the hydraulic system can directly return to the tractor along the second oil path without filtration. This ensures that the implement's hydraulic system can operate stably and reliably, extending the service life of both the hydraulic system and the implement.

[0043] In one embodiment of this application, preferably, as shown below, Figure 2 As shown, the end cap 1 has a first valve chamber 13 and a second valve chamber 14. The first valve chamber 13 is connected to the first interface 11, and the second valve chamber 14 is connected to the second interface 12. At the same time, a partition is formed between the end cap 1, the first valve chamber 13, and the second valve chamber 14. A second check valve 4 is installed on the partition, and the inlet of the second check valve 4 faces the second valve chamber 14 and is connected to the second valve chamber 14. The outlet of the second check valve 4 faces the first valve chamber 13 and is connected to the first valve chamber 13. This allows the return oil from the hydraulic system of the implement to first flow into the second valve chamber 14 through the second interface 12, then into the first valve chamber 13 through the second check valve 4, and finally out through the first interface 11 to return to the hydraulic oil tank of the tractor.

[0044] In this embodiment, preferably, as follows: Figure 2 As shown, the filter element 2 includes a filter housing 22 and a filter element 21 disposed within the filter housing 22. Both the filter housing 22 and the filter element 21 are cup-shaped structures with an open end, and the open ends of the filter housing 22 and the filter element 21 face the end cap 1. The end cap 1 forms a first flow channel 15 and a second flow channel 16. One end of the first flow channel 15 is connected to the first valve chamber 13, and the other end of the first flow channel 15 is connected to the interior of the filter housing 22. One end of the second flow channel 16 is connected to the second valve chamber 14, and the other end of the second flow channel 16 is connected to the interior of the filter element 21. Meanwhile, a first one-way valve 3 is installed in the first flow channel 15, and the inlet of the first one-way valve 3 faces the first valve chamber 13 and is connected to the first valve chamber 13. The outlet of the second one-way valve 4 faces the first valve chamber 13 and is connected to the first valve chamber 13. Therefore, when the tractor supplies oil to the hydraulic system of the implement, the oil can first flow into the first valve chamber 13 through the first interface 11, then flow into the filter housing 22 through the first flow channel 15, be filtered by the filter element 21, flow into the second valve chamber 14 along the second flow channel 16, and finally flow out through the second interface 12 to flow into the hydraulic system of the implement.

[0045] In this embodiment, preferably, as follows: Figure 2 As shown, the end cap 1 is provided with a first connecting part, and the open end of the filter element 21 can be screwed into the first connecting part. For example, the outer wall of the first connecting part forms a first external thread connecting part, and the open end of the filter element 21 forms a first internal thread connecting part. The first internal thread connecting part and the first external thread connecting part are adapted to each other, so that the filter element 21 can be screwed onto the first connecting part. At the same time, the second flow channel 16 passes through the end of the first connecting part facing the filter element 21, so that the interior of the filter element 21 is connected to the second valve chamber 14 and the second interface 12 through the second flow channel 16, so that the oil flowing in through the first interface 11 can flow into the filter housing 22, overflow into the second flow channel 16 after being filtered by the filter element 21, and finally flow out through the second interface 12.

[0046] In this embodiment, preferably, as follows: Figure 2 As shown, the end cap 1 is provided with a second connecting portion, which surrounds the outside of the first connecting portion, and the open end of the filter housing 22 can be screwed into the second connecting portion. For example, the inner sidewall of the second connecting portion forms a second internal thread connecting portion, and the open end of the filter housing 22 forms a second external thread connecting portion. The second external thread connecting portion and the second internal thread connecting portion are adapted to each other, so that the open end of the filter housing 22 can be inserted into the interior of the second connecting portion and connected by screwing. At the same time, the first flow channel 15 forms a through hole at the end of the end cap 1 facing the filter housing 22. This through hole is located between the first connecting portion and the second connecting portion, so that the first flow channel 15 can communicate with the filter housing 22, so that the oil flowing in through the first interface 11 can flow into the filter housing 22 through the first flow channel 15, and then flow out through the second interface 12 after being filtered by the filter element 21.

[0047] In this embodiment, preferably, as follows: Figure 2 As shown, the filter element 21 has a drain port at the end away from the end cap 1, and a bypass valve 23 is provided at the drain port for opening or closing the drain port. Specifically, when the filter element 21 can filter the oil normally, the drain port is closed; when the filter element 21 is blocked and the internal pressure of the filter element 21 rises to a preset value, the bypass valve 23 can automatically open under the pressure to open the drain port and discharge the oil in the filter element 21 directly into the filter housing 22.

[0048] In one embodiment of this application, preferably, as shown below, Figure 2 As shown, the filter housing 22 has a vent at the end away from the end cover 1, and a removable first sealing element 24 is provided inside the vent. Thus, when multiple filter elements 21 need to be disassembled and repaired, the vent can be opened first to drain the oil inside the filter housing 22.

[0049] In one embodiment of this application, preferably, as shown below, Figure 2 As shown, the end cap 1 is provided with a first detection port and a second detection port. The first detection port is connected to the first valve chamber 13, and the second detection port is connected to the second valve chamber 14. When the bidirectional filter is working normally, the first and second detection ports can be sealed by the second sealing element 17 to prevent leakage. When it is necessary to check whether the bidirectional filter is faulty, such as whether the filter element 21 is clogged, pressure gauges can be installed at the first and second detection ports respectively for pressure testing. If the pressure difference between the two pressure gauges is higher than the preset value, it indicates that the filter element 21 is clogged.

[0050] In one embodiment of this application, preferably, as shown below, Figure 3 As shown, there are multiple filter elements 2, which are installed side by side and spaced apart on the end cover 1. Each filter element 2 on the end cover 1 is equipped with a first interface 11, a second interface 12 and a one-way valve group, so that multiple filter elements 2 can work independently.

[0051] Multiple filter elements 2 can serve different hydraulic components in the hydraulic system of the machine tool, or they can serve the same hydraulic component. For example, there are two filter elements 2, one of which serves the oil inlet and return of the rodless chamber of the hydraulic cylinder, and the other serves the oil inlet and return of the rod chamber of the hydraulic cylinder. In both cases, the oil inlet passes through the filter element 2, but the oil return does not pass through the filter element 2.

[0052] This application also provides a tractor that includes the bidirectional filter of any of the above embodiments.

[0053] In this embodiment, the tractor includes a two-way filter, and therefore the tractor has all the beneficial effects of a two-way filter, which will not be described in detail here.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A bidirectional filter, characterized in that, It includes an end cap and a filter element, wherein the filter element is connected to the end cap; The end cap is provided with a first interface, a second interface, and a one-way valve group, wherein the one-way valve group includes a first one-way valve and a second one-way valve. The first interface, the first check valve, the filter element, and the second interface are sequentially connected to form a first oil circuit, and the inlet of the first check valve faces the first interface; The second interface, the second check valve, and the first interface are sequentially connected to form a second oil circuit, and the outlet of the second check valve faces the second interface.

2. The bidirectional filter according to claim 1, characterized in that, The end cap has a first valve chamber and a second valve chamber, the first valve chamber being connected to the first interface and the second valve chamber being connected to the second interface; The filter element includes a filter element and a filter housing, with the filter housing fitted over the outside of the filter element; The end cap has a first flow channel and a second flow channel. The first flow channel connects the filter shell and the first valve chamber, and the second flow channel connects the filter element and the second valve chamber. The first one-way valve is installed in the first flow channel, and the outlet of the first one-way valve is connected to the filter housing, and the inlet of the first one-way valve is connected to the second valve chamber.

3. The bidirectional filter according to claim 2, characterized in that, The end cap forms a partition between the first valve chamber and the second valve chamber. The second one-way valve is installed on the partition, and the inlet of the second one-way valve is connected to the second valve chamber, while the outlet of the second one-way valve is connected to the first valve chamber.

4. The bidirectional filter according to claim 2, characterized in that, The end cap is provided with a first connecting part, the open end of the filter element is adapted to be screwed into the first connecting part, and the second flow channel passes through the first connecting part to communicate with the interior of the filter element.

5. The bidirectional filter according to claim 4, characterized in that, The end cap is provided with a second connecting portion, which is arranged around the outside of the first connecting portion; The open end of the filter housing is adapted to be screwed onto the first connecting part, and the first flow channel forms a through hole on the end cap between the first connecting part and the second connecting part.

6. The bidirectional filter according to claim 2, characterized in that, The filter element is provided with a drain port and a bypass valve for sealing the drain port at the end away from the end cap. When the pressure inside the filter element reaches a preset value, the bypass valve can open the drain port.

7. The bidirectional filter according to claim 2, characterized in that, The filter housing has a vent at one end away from the end cap, and a removable first sealing element is provided inside the vent.

8. The bidirectional filter according to claim 2, characterized in that, The end cap is provided with a first detection port and a second detection port, the first detection port being connected to the first valve cavity and the second detection port being connected to the second valve cavity; The first detection port and the second detection port are used to install a second sealing component or a pressure detection component.

9. The bidirectional filter according to claim 1, characterized in that, The filter elements are multiple and spaced apart, and the end cap is configured with the first interface, the second interface and the one-way valve group for each filter element.

10. A tractor, characterized in that, The bidirectional filter includes any one of claims 1 to 9.

Images