Filter screen assembly of gearbox

Abstract

The utility model belongs to the field of filter screen assemblies, and particularly relates to a gearbox filter screen assembly which comprises an external filter shell, the left side of the upper end of the external filter shell is communicated with an oil inlet, the right side of the lower end of the external filter shell is communicated with an oil outlet, and a square frame is slidably connected into the external filter shell. A plurality of filter screens are fixedly connected to the inner ring wall of the square frame, a mounting block is fixedly connected to the side edge of the square frame, and the mounting block penetrates through the external filter shell and is in sliding connection with the external filter shell. According to the utility model, the square frame internally provided with the plurality of filter screens is arranged, and the filter screens are quickly pulled and replaced by matching with the pull handle through the design of the external filter shell and the slidable square frame, so that the maintenance difficulty is greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of filter assembly technology, specifically a filter assembly for a gearbox. Background Technology

[0002] In a transmission system, the cleanliness of the hydraulic fluid (or transmission oil) directly affects its performance and lifespan. Metal shavings, friction material particles, and other contaminants in the fluid can accelerate the wear of precision components such as valve bodies, clutches, and bearings, leading to shift jerking, insufficient oil pressure, or even transmission failure. Therefore, the filter assembly is a critical component for transmission fluid filtration, used to intercept impurities and keep the oil passages clear.

[0003] A search revealed a utility model patent with patent authorization announcement number CN212225960U, which discloses a gearbox filter screen with annular guide plates. The filter screen consists of an upper housing, a filter screen, and a lower housing. The upper housing and the lower housing are fixedly connected by bolts on the outside. The filter screen is fixedly installed between the upper housing and the lower housing. An oil outlet is provided on one side of the top of the upper housing, and an oil inlet is provided at the middle of the bottom of the lower housing. A circular magnet is fixedly installed on the outer side of the lower end of the oil inlet. Several annular guide plates, which increase in height from the inside to the outside, are arranged concentrically with the oil inlet inside the lower housing.

[0004] Traditional transmission filters are typically built-in and installed inside the oil pan. Replacing them requires removing the oil pan, which is complicated and repeated disassembly and reassembly can easily cause oil leaks. In addition, while some external filters are easier to maintain, their installation stability is insufficient, and oil seepage may occur after long-term use, affecting the filtration effect. Utility Model Content

[0005] The purpose of this utility model is to provide a filter assembly for a transmission, which solves the problems of traditional transmission filters, which are usually designed to be built-in and installed inside the oil pan. When replacing them, the oil pan needs to be removed, which is complicated and repeated disassembly and reassembly can easily cause oil leakage. In addition, although some external filters are easy to maintain, their installation stability is insufficient and they may leak oil after long-term use, affecting the filtration effect.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a filter assembly for a gearbox, comprising an external filter housing, an oil inlet connected to the upper left side of the external filter housing, an oil outlet connected to the lower right side of the external filter housing, a square frame slidably connected inside the external filter housing, multiple filter screens fixedly connected to the inner wall of the square frame, a mounting block fixedly connected to the side of the square frame, the mounting block penetrating the external filter housing and slidably connected to the external filter housing, positioning blocks fixedly connected to the upper and lower ends of the mounting block, the positioning blocks contacting the outer wall of the external filter housing, and a mounting seat fixedly connected to the upper right side of the external filter housing, the mounting seat engaging with the positioning blocks, and the mounting seat contacting the mounting blocks.

[0007] Preferably, a sealing ring is embedded in the outer wall of the mounting block, and the sealing ring abuts against the side wall of the external filter housing. The sealing ring increases the airtightness between the mounting block and the external filter housing.

[0008] Preferably, the mounting block is fixedly connected to a handle on one side of the external filter housing, and the handle is made of plastic. The handle facilitates the pulling of the mounting block.

[0009] Preferably, the mounting block has an internally slidably connected inclined block, and a locking pin is fixedly connected to the inclined block. The locking pin passes through the mounting base and is slidably connected to the mounting base. The locking pin is inserted into a positioning block. A push bracket is slidably connected to the top of the mounting base. The push bracket is U-shaped, and its end abuts against the inclined surface of the inclined block. By cooperating with the inclined surface of the inclined block, the engagement and disengagement between the locking pin and the positioning block can be controlled.

[0010] Preferably, a guide rod is fixedly connected to the inner wall of the mounting base, the guide rod is slidably connected to the inclined block, and a spring is provided inside the inclined block. One end of the spring is fixedly connected to the guide rod, and the other end of the spring is fixedly connected to the inner surface of the inclined block. The guide rod and spring provide auxiliary resetting for the telescopic movement of the inclined block.

[0011] Preferably, the upper and lower ends of the inclined block are provided with ball bearings, which are slidably connected to the inner surface of the mounting base. The ball bearings reduce the relative friction between the inclined block and the mounting base.

[0012] Preferably, a limiting ring is fixedly connected to the vertical part of the push frame, and the limiting ring contacts the inner surface of the mounting base. The limiting ring serves to limit and prevent the push frame from detaching.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model sets up a frame with multiple built-in filters, and then uses an external filter shell and a sliding frame design, along with a pull handle, to achieve quick pull-out replacement of the filters, greatly reducing the difficulty of maintenance.

[0015] 2. This utility model sets an installation block on a square frame, a positioning block on the installation block, and a mounting seat on the corresponding position on the external filter shell. The mounting seat contains an inclined block with a locking pin, and the inclined block is elastically supported by a spring. In addition, a pusher is set on the mounting seat. By using the cooperation between the pusher and the inclined surface of the inclined block, the engagement and disengagement between the locking pin and the positioning block can be controlled, thereby ensuring the convenience and stability of the installation of the installation block, square frame and filter screen. Attached Figure Description

[0016] Figure 1 This is a perspective view of the overall structure of this utility model;

[0017] Figure 2 This utility model Figure 1 A partial structural diagram;

[0018] Figure 3 This utility model Figure 1 A front sectional view;

[0019] Figure 4 This utility model Figure 3 Enlarged view of point A;

[0020] Figure 5 This utility model Figure 1 Side sectional view of the mounting bracket;

[0021] Figure 6 This utility model Figure 5 Enlarged view of point B.

[0022] In the diagram: 1. External filter housing; 101. Oil inlet; 102. Oil outlet; 2. Square frame; 3. Filter screen; 4. Mounting block; 5. Sealing ring; 6. Pull handle; 7. Positioning block; 8. Mounting base; 9. Inclined block; 10. Locking pin; 11. Guide rod; 12. Spring; 13. Ball bearing; 14. Push frame; 15. Limiting ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1-5 A filter assembly for a transmission includes an external filter housing 1. An oil inlet 101 is connected to the upper left side of the external filter housing 1, and an oil outlet 102 is connected to the lower right side of the external filter housing 1. A square frame 2 is slidably connected inside the external filter housing 1. Multiple filter screens 3 are fixedly connected to the inner wall of the square frame 2. A mounting block 4 is fixedly connected to the side of the square frame 2, penetrating the external filter housing 1 and slidably connected to it. A sealing ring 5 is embedded in the outer wall of the mounting block 4, and the sealing ring 5 abuts against the side wall of the external filter housing 1. The sealing ring 5 increases the sealing between the mounting block 4 and the external filter housing 1. A pull handle 6, made of plastic, is fixedly connected to one side of the mounting block 4 on the external filter housing 1. The pull handle 6 facilitates pulling the mounting block 4.

[0025] Please see Figures 5-6 The mounting block 4 has positioning blocks 7 fixedly connected to both its upper and lower ends. Positioning blocks 7 contact the outer wall of the external filter housing 1. A mounting base 8 is fixedly connected to the upper right side of the external filter housing 1. The mounting base 8 engages with the positioning blocks 7 and contacts the mounting block 4. This design of one mounting base 8 and two positioning blocks 7 allows the mounting block 4 and the frame 2 to be inserted directly without needing to distinguish between upper and lower surfaces. An inclined block 9 is slidably connected inside the mounting block 4. A locking pin 10 is fixedly connected to the inclined block 9, passing through the mounting base 8 and slidably connected to it. The locking pin 10 is inserted into the positioning blocks 7. A pusher 14 is slidably connected to the top of the mounting base 8. The pusher 14 is U-shaped, and its end abuts against the inclined surface of the inclined block 9. The engagement between the pusher 14 and the inclined surface of the inclined block 9 controls the separation between the locking pin 10 and the positioning blocks 7. A guide rod 11 is fixedly connected to the inner wall of the mounting base 8. The guide rod 11 is slidably connected to the inclined block 9. A spring 12 is installed inside the inclined block 9. One end of the spring 12 is fixedly connected to the guide rod 11, and the other end of the spring 12 is fixedly connected to the inner surface of the inclined block 9. The guide rod 11 and the spring 12 assist in the repositioning of the inclined block 9. Ball bearings 13 are provided at both the upper and lower ends of the inclined block 9, and the ball bearings 13 are slidably connected to the inner surface of the mounting base 8. The ball bearings 13 reduce the relative friction between the inclined block 9 and the mounting base 8. A limit ring 15 is fixedly connected to the vertical part of the push frame 14, and the limit ring 15 contacts the inner surface of the mounting base 8. The limit ring 15 limits and prevents the push frame 14 from detaching.

[0026] The specific implementation process of this utility model is as follows: In use, firstly, the oil inlet 101 and oil outlet 102 of the external filter housing 1 are connected to the gearbox through pipelines. Then, by pressing down the pusher 14, the pusher 14 cooperates with the inclined surface of the inclined block 9, which allows the inclined block 9 to move, thereby causing the locking pin 10 on the inclined block 9 to retract into the mounting base 8. Then, the frame 2 is inserted into the external filter housing 1. At this time, the filter screen 3 on the frame 2 is placed between the oil inlet 101 and the oil outlet 102. At the same time, the mounting block 4 on the frame 2 is placed at the insertion port on the side of the external filter housing 1, and the positioning block 7 on the mounting block 4 is inserted into the mounting base 8. At this time, the pusher 14 is released, and the inclined block 9 will be reset under the action of the spring 12, and the locking pin 10 will be inserted horizontally into the positioning block 7, thereby completing the overall installation. Similarly, the above steps can be reversed to pull out the filter screen 3 for replacement.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A filter assembly for a gearbox, comprising an external filter housing (1), characterized in that: An oil inlet (101) is connected to the upper left side of the external filter housing (1), and an oil outlet (102) is connected to the lower right side of the external filter housing (1). A square frame (2) is slidably connected inside the external filter housing (1). Multiple filter screens (3) are fixedly connected to the inner wall of the square frame (2). An installation block (4) is fixedly connected to the side of the square frame (2). The installation block (4) penetrates the external filter housing (1) and is slidably connected to the external filter housing (1). A positioning block (7) is fixedly connected to both the upper and lower ends of the installation block (4). The positioning block (7) contacts the outer wall of the external filter housing (1). An installation seat (8) is fixedly connected to the upper right side of the external filter housing (1). The installation seat (8) is engaged with the positioning block (7). The installation seat (8) contacts the installation block (4).

2. The filter assembly for a gearbox according to claim 1, characterized in that: A sealing ring (5) is embedded in the outer wall of the mounting block (4), and the sealing ring (5) abuts against the side wall of the external filter shell (1).

3. The filter assembly for a gearbox according to claim 1, characterized in that: The mounting block (4) is fixedly connected to a handle (6) on one side of the external filter housing (1), and the handle (6) is made of plastic.

4. The filter assembly for a gearbox according to claim 1, characterized in that: The mounting block (4) has an inclined block (9) slidably connected inside. A locking pin (10) is fixedly connected to the inclined block (9). The locking pin (10) passes through the mounting base (8) and is slidably connected to the mounting base (8). The locking pin (10) is inserted into the positioning block (7). A pusher (14) is slidably connected to the top of the mounting base (8). The pusher (14) is U-shaped. The end of the pusher (14) abuts against the inclined surface of the inclined block (9).

5. A filter assembly for a gearbox according to claim 4, characterized in that: The inner wall of the mounting base (8) is fixedly connected to a guide rod (11), the guide rod (11) is slidably connected to the inclined block (9), and a spring (12) is provided inside the inclined block (9). One end of the spring (12) is fixedly connected to the guide rod (11), and the other end of the spring (12) is fixedly connected to the inner surface of the inclined block (9).

6. The filter assembly for a gearbox according to claim 4, characterized in that: The upper and lower ends of the inclined block (9) are provided with ball bearings (13), and the ball bearings (13) are slidably connected to the inner surface of the mounting base (8).

7. A filter assembly for a gearbox according to claim 4, characterized in that: The vertical part of the pusher (14) is fixedly connected to a limiting ring (15), and the limiting ring (15) is in contact with the inner surface of the mounting base (8).

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