An integrated filter assembly

Abstract

The utility model discloses an integrated filter assembly, including the filter seat assembly and filter casing assembly of being connected, the filter seat assembly includes the filter seat, the inside of filter seat is provided with first oil circuit and second oil circuit, be provided with the first mounting hole of intercommunication first oil circuit with outside on filter seat, be provided with pressure difference switch in first mounting hole, the pressure difference switch includes the body, the axial front side of body is provided ring cavity, the pressure difference switch integrated on filter seat monitors the oil pressure difference of filter core both sides, along with filter core gradually block, and pressure difference will correspond to rise, when pressure difference reaches the critical value of prearranging, and pressure difference switch triggers, and timely reminds the driver through the warning light or sound signal on the instrument board of vehicle, and this kind of accurate alarm based on actual block degree avoids prematurely or late replacement filter core, ensures the filtration efficiency, and fully excavates the filtration potential of filter core to prolong the service life effectively.

Description

Technical Field

[0001] This utility model belongs to the field of automatic transmissions and relates to filters, specifically an integrated filter assembly. Background Technology

[0002] In the hydraulic transmission system of an automatic transmission, the filter assembly is an essential component, and its filtration efficiency directly affects the transmission's performance. The working principle of the filter assembly is to filter the low-cleanliness oil in the transmission oil pan through the filter element, transforming it into oil that meets the cleanliness level of ISO 16 / 13 or higher, for use by the automatic transmission hydraulic system. The filter element is a consumable part and needs to be replaced regularly, as indicated by the differential pressure switch alarm, to ensure that the transmission hydraulic system meets the requirements of high-quality oil.

[0003] In current common filter structure designs, filter assemblies typically include a filter housing, filter element, pressure sensor, and filter holder. The filter element replacement cycle is determined by comparing two sets of pressure data measured by the pressure sensor. However, the sensors are often scattered, requiring a lot of installation space, and the parts are expensive, making maintenance inconvenient. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an integrated filter assembly to solve the technical problem of automatic transmission damage caused by oil circuit blockage in the existing technology.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: An integrated filter assembly includes a connected filter housing assembly and a filter body assembly; The filter housing assembly includes a filter housing, the filter housing has a first oil passage and a second oil passage inside, the filter housing has a first mounting hole connecting the first oil passage to the outside, a differential pressure switch is provided in the first mounting hole, the differential pressure switch includes a body, the front side of the body has an annular cavity, and a first piston, a first spring and a first retaining ring are arranged sequentially along the axial direction in the annular cavity; The filter housing is also provided with a second mounting hole that connects the first oil passage and the second oil passage. A second retaining ring is provided in the second mounting hole, and a bypass valve is provided on the lateral rear side of the second retaining ring. The filter housing assembly includes a filter housing connected to the outer wall of the filter seat, a central frame coaxial with the filter housing is provided in the filter housing, and a filter element is provided in the annular cavity formed by the filter housing and the central frame. The second oil passage is an annular cavity, and the second oil passage is connected to the annular cavity through a first branch. The annular cavity is connected to the first mounting hole through a second branch.

[0006] This utility model also includes the following technical features: The bypass valve includes an annular housing disposed on the axial rear side of the second retaining ring, and a second piston and a second spring are sequentially disposed in the annular housing.

[0007] The filter element has a filter element mounting base at its axial front end, and the axial front end of the filter element mounting base is fixedly connected to the filter holder.

[0008] A first sealing ring is fitted between the filter housing and the filter seat.

[0009] A second sealing ring is provided between the filter element mounting base and the filter holder.

[0010] The differential pressure switch and the filter housing are connected by a thread.

[0011] A third sealing ring is provided between the differential pressure switch and the filter housing.

[0012] A fourth sealing ring is provided between the outer wall of the bypass valve and the second mounting hole.

[0013] A fifth sealing ring is provided between the differential pressure switch and the first mounting hole.

[0014] Compared with the prior art, the beneficial technical effects of this utility model are: (I) In this utility model, the differential pressure switch integrated on the filter housing continuously monitors the oil pressure difference on both sides of the filter element. As the filter element gradually becomes clogged, the pressure difference will increase accordingly. When the pressure difference reaches the preset critical value, the differential pressure switch is triggered, and the driver is promptly reminded by the warning light or sound signal on the vehicle's dashboard. This accurate alarm based on the actual degree of clogging avoids replacing the filter element too early or too late, ensuring filtration efficiency and fully tapping the filtration potential of the filter element, thereby effectively extending its service life.

[0015] (II) Furthermore, the bypass valve in this invention automatically opens under safe pressure when the filter element is severely clogged and the pressure differential is extremely high, and the driver fails to replace it immediately. At this time, the oil that has not been finely filtered by the filter will directly enter the transmission hydraulic system through the bypass valve, providing the transmission with the most basic lubrication and pressure, ensuring that the vehicle can continue to operate for a short period of time. The core purpose of the bypass valve is to provide emergency response, avoiding the serious consequences of oil circuit interruption and instantaneous transmission damage caused by complete filter blockage, providing the driver with a crucial safety buffer, and solving the technical problem of automatic transmission damage caused by oil circuit blockage in the prior art. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the overall structure of this utility model from another angle; Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 This is a cross-sectional schematic diagram of the filter holder in this utility model; Figure 5 for Figure 4 A magnified view of a portion of the image; Figure 6 for Figure 4 Another enlarged view of a portion of the image.

[0017] The labels in the diagram represent the following: 1-Filter housing, 2-Differential pressure switch, 3-Filter element, 4-Central frame, 5-Second sealing ring, 6-First sealing ring, 7-Filter housing, 8-Second retaining ring, 9-Fourth sealing ring, 10-Bypass valve, 11-First oil passage, 12-Second oil flow, 13-Annular cavity, 14-First mounting hole, 15-First branch, 16-Second branch, 17-Filter element mounting base, 18-Second mounting hole; 2a - First retaining ring, 2b - First spring, 2c - Fifth sealing ring, 2d - First piston, 2e - Third sealing ring; 10a - Second piston, 10b - Second spring.

[0018] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, all components in this utility model are components known in the art.

[0020] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0021] This utility model provides an integrated filter assembly, such as Figures 1 to 6 As shown, it includes a connected filter housing assembly and a filter housing assembly; The filter housing assembly includes a filter housing 1. The filter housing 1 has a first oil passage 11 and a second oil passage 12 inside. The filter housing 1 has a first mounting hole 14 that connects the first oil passage 11 to the outside. A differential pressure switch 2 is installed in the first mounting hole 14. The differential pressure switch 2 includes a body. An annular cavity 13 is provided on the axial front side of the body. A first piston 2d, a first spring 2b and a first retaining ring 2a are arranged sequentially along the axial direction in the annular cavity 13. The filter housing 1 is also provided with a second mounting hole 18 that connects the first oil passage 11 and the second oil passage 12. A second retaining ring 8 is provided in the second mounting hole 18, and a bypass valve 10 is provided on the lateral rear side of the second retaining ring 8. The filter housing assembly includes a filter housing 7 connected to the outer wall of the filter seat 1. A central frame 4 coaxial with the filter housing 7 is provided in the filter housing 7, and a filter element 3 is provided in the annular cavity formed by the filter housing 7 and the central frame 4. The second oil passage 12 is an annular cavity. The second oil passage 12 is connected to the annular cavity 13 through the first branch 15. The annular cavity 13 is connected to the first mounting hole 14 through the second branch 16. In the above technical solution, the filter element 3 is assembled on the central frame 4. The central frame 4 plays a protective and support role for the filter element 3, preventing the filter element 3 from twisting and deforming due to oil pressure during operation. The right end of the filter element 3 mates with the central frame 4, and both are flush with the bottom of the filter housing 7. The filter element mounting base 17 mates with the filter seat 1.

[0022] When the filter element is working normally, the bypass valve 10 remains stationary. When the filter element 3 becomes increasingly clogged, the flow rate and pressure of the first oil circuit 11 decrease, while the flow rate and pressure of the second oil circuit 12 remain unchanged. A pressure difference is generated between the first oil circuit 11 and the second oil circuit 12. When a certain set pressure value is reached, the hydraulic oil in the second oil circuit 12 will push it open, connecting the second oil circuit 12 and the first oil circuit 11. At this time, the second oil circuit 12 is allowed to enter the first oil circuit 11 for a short time, and then enter the external hydraulic system to provide sufficient hydraulic oil to the transmission, ensuring that the vehicle can get out of trouble in an emergency and avoiding damage to the automatic transmission.

[0023] At the same time, the oil in the second oil circuit 12 will enter the annular cavity 13 through the first branch 15, which will push the piston 2d of the differential pressure switch 2 to move forward axially against the spring force of the spring 2b. At this time, the annular cavity 13 will increase in size, and the differential pressure switch 2 will detect the change in displacement of the piston 2d, thereby forming a warning signal to alert the driver in the cab to replace and maintain the filter element 3.

[0024] The bypass valve 10 includes an annular housing disposed on the lateral rear side of the second retaining ring 8, and a second piston 10a and a second spring 10b are sequentially disposed in the annular housing.

[0025] In the above technical solution, the hydraulic oil in the second oil circuit 12 will push the piston 10a of the bypass valve 10 to move laterally and rearward against the spring force of the spring 10b, and the bypass valve 10 will open.

[0026] The filter element 3 has a filter element mounting base 17 at its axial front end, and the axial front end of the filter element mounting base 17 is fixedly connected to the filter holder 1.

[0027] In the above technical solution, the filter element mounting base 17 is used to connect the filter element 3 and the filter holder 1, making the device more stable.

[0028] A first sealing ring 6 is fitted between the filter housing 7 and the filter seat 1.

[0029] In the above technical solution, the first sealing ring 6 can prevent oil from leaking to the outside of the device.

[0030] A second sealing ring 5 is provided between the filter element mounting base 17 and the filter holder 1.

[0031] In the above technical solution, the second sealing ring 5 prevents the oil in the first oil passage 11 and the second oil passage 12 from mixing.

[0032] The differential pressure switch 2 and the filter holder 1 are connected by a thread.

[0033] In the above technical solutions, threaded connections facilitate installation and disassembly.

[0034] A third sealing ring 2e is provided between the differential pressure switch 2 and the filter seat 1.

[0035] In the above technical solution, the third sealing ring 2e is used to prevent oil in the annular cavity 13 and the first mounting hole 14.

[0036] A fourth sealing ring 9 is provided between the outer wall of the bypass valve 10 and the second mounting hole 18.

[0037] In the above technical solution, the fourth sealing ring 9 prevents the oil in the first oil passage 11 and the second oil passage 12 from mixing.

[0038] A fifth sealing ring 2c is provided between the differential pressure switch 2 and the first mounting hole 14.

[0039] In the above technical solution, the fifth sealing ring 2c separates the first oil passage 11 from the second oil passage 12.

Claims

1. An integrated filter assembly, characterized in that, Includes the connected filter housing assembly and filter body assembly; The filter housing assembly includes a filter housing (1), and the filter housing (1) is provided with a first oil passage (11) and a second oil passage (12). The filter housing (1) is provided with a first mounting hole (14) connecting the first oil passage (11) and the outside. A differential pressure switch (2) is provided in the first mounting hole (14). The differential pressure switch (2) includes a body. An annular cavity (13) is provided on the axial front side of the body. A first piston (2d), a first spring (2b) and a first retaining ring (2a) are arranged sequentially along the axial direction in the annular cavity (13). The filter housing (1) is also provided with a second mounting hole (18) that connects the first oil passage (11) and the second oil passage (12). A second retaining ring (8) is provided in the second mounting hole (18), and a bypass valve (10) is provided on the lateral rear side of the second retaining ring (8). The filter housing assembly includes a filter housing (7) connected to the outer wall of the filter seat (1), a central frame (4) coaxial with the filter housing (7) is provided in the filter housing (7), and a filter element (3) is provided in the annular cavity formed by the filter housing (7) and the central frame (4). The second oil passage (12) is an annular cavity. The second oil passage (12) is connected to the annular cavity (13) through the first branch (15). The annular cavity (13) is connected to the first mounting hole (14) through the second branch (16).

2. The integrated filter assembly as described in claim 1, characterized in that, The bypass valve (10) includes an annular housing disposed on the axial rear side of the second retaining ring (8), and a second piston (10a) and a second spring (10b) are sequentially disposed in the annular housing.

3. The integrated filter assembly as described in claim 1, characterized in that, The filter element (3) has a filter element mounting seat (17) at its axial front end, and the filter element mounting seat (17) is fixedly connected to the filter holder (1).

4. The integrated filter assembly as described in claim 1, characterized in that, A first sealing ring (6) is fitted between the filter housing (7) and the filter seat (1).

5. The integrated filter assembly as described in claim 3, characterized in that, A second sealing ring (5) is provided between the filter element mounting base (17) and the filter holder (1).

6. The integrated filter assembly as described in claim 1, characterized in that, The differential pressure switch (2) and the filter holder (1) are connected by a thread.

7. The integrated filter assembly as described in claim 1, characterized in that, A third sealing ring (2e) is provided between the differential pressure switch (2) and the filter seat (1).

8. The integrated filter assembly as described in claim 1, characterized in that, A fourth sealing ring (9) is provided between the outer wall of the bypass valve (10) and the second mounting hole (18).

9. The integrated filter assembly as described in claim 1, characterized in that, A fifth sealing ring (2c) is provided between the differential pressure switch (2) and the first mounting hole (14).

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