A mesh filter, a gearbox and a method of assembly

Abstract

The application discloses a mesh filter, a gearbox and an assembling method. One end of a steel pipe is connected with a pipe joint, and the other end is connected with a screw plug. A magnet is arranged in the steel pipe. An oil suction port is arranged on the pipe wall of the steel pipe. A filter screen is connected with the oil suction port. The magnet is arranged at the end of the steel pipe. A necking portion is arranged on the steel pipe and is arranged between the filter screen and the magnet. The diameter of the necking portion is smaller than the minimum diameter of the magnet. The end of the steel pipe away from the magnet is provided with an expanding portion. The mesh filter has sufficient filtering area. The filter screen can be arranged at the lower end of the steel pipe. The oil passing capacity is high. The two ends of the steel pipe are provided with matched positioning. The positioning reliability is good. The two ends of the steel pipe are provided with sealing rings. The sealing performance is good. The mesh filter can be arranged close to an oil pan. The normal oil suction function is not affected when the liquid level is low. The depth requirement of the oil pan is low. The longitudinal space of the whole gearbox is reduced. The shell of the gearbox is provided with a groove. The longitudinal space occupied by the filter is further reduced.

Description

Technical Field

[0001] This invention belongs to the field of transmission filter technology, specifically relating to a mesh filter, a transmission, and an assembly method. Background Technology

[0002] Mesh filters are widely used in automatic transmissions. They are typically installed at the suction end of the hydraulic pump to filter impurities in the transmission fluid, ensuring the normal operation of the automatic transmission. Existing mesh filters can be classified into tubular and flanged types based on their external dimensions.

[0003] In automatic transmissions, mesh filters are typically located in the oil pan. Ordinary mesh filters have the following drawbacks: insufficient filtration area and weak oil flow capacity; fixed at one end, resulting in unreliable positioning; single-layer sealing structure, posing a risk of leakage; difficulty in oil suction when the oil level is low; complex assembly structure and high replacement costs; and large space occupation, which is inconvenient for assembly layout.

[0004] Patent publication number CN203335169U, entitled "Engine Oil Filter," includes an oil suction pipe installed outside the engine's oil pan; a filter assembly disposed at one end of the oil suction pipe and installed inside the engine's oil pan; and an oil suction pipe flange at the end of the oil suction pipe sealed and fixedly connected to the filter assembly by means of screws and a sealing ring. This patent application can reduce wear on the oil suction pipe body and improve its service life, but it cannot properly draw oil when the oil level is low. Summary of the Invention

[0005] In order to overcome the problems existing in the prior art, the present invention aims to provide a mesh filter, a gearbox and an assembly method. Through the cooperation between the mesh filter and the gearbox housing, the mesh filter does not affect the normal oil suction function when the liquid level is low, the oil pan depth requirement is low and the longitudinal space of the entire tank is reduced.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] A mesh filter, comprising:

[0008] A steel pipe, one end of which is connected to a pipe fitting, and the other end of which is connected to a screw plug;

[0009] A magnet, wherein the magnet is disposed inside the steel pipe;

[0010] An oil suction port is provided on the wall of the steel pipe;

[0011] The oil suction port is connected to a filter screen, the magnet is disposed at the end of the steel pipe, and the steel pipe is provided with a neck, which is disposed between the filter screen and the magnet; the diameter of the neck is smaller than the minimum diameter of the magnet; and the end of the steel pipe away from the magnet is provided with a flared end.

[0012] Optionally, the filter screen has a mesh size of 24.

[0013] Optionally, the magnet is bar-shaped.

[0014] Optionally, the magnet is fixed to the inner wall of the steel pipe by adhesive bonding.

[0015] Optionally, the connection strength between the filter screen and the oil suction port is greater than 20N.

[0016] A gearbox includes a mesh filter and a housing, wherein the housing has two mating holes and a housing recess is provided between the two mating holes, and the steel pipe is matched with the housing recess.

[0017] Optionally, a first sealing ring is provided on the outside of the pipe joint.

[0018] Optionally, a second sealing ring is provided outside the screw plug.

[0019] Optionally, one end of the steel pipe with a flared end is pressurized and fixed to the shell, while the other end is clearance-fitted to the shell.

[0020] The assembly method of the gearbox includes the following steps:

[0021] Insert the end of the steel pipe closest to the magnet into the mating seat hole of the housing until the flared end is pressed into the mating seat hole of the housing;

[0022] Keep the filter screen facing down and tighten the screw plug and pipe fitting;

[0023] Seal the screw plugs and pipe fittings.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] This invention features a simple process and low manufacturing cost; it provides ample filtration area, allowing filter screens to be placed at the lower end of the steel pipe, resulting in strong oil flow capacity; both ends of the steel pipe have matching positioning for high reliability; and sealing rings at both ends ensure excellent sealing. The mesh filter of this invention can be placed close to the oil pan, maintaining normal oil suction even at low oil levels, and has low requirements for oil pan depth, reducing the overall longitudinal space required by the transmission. Furthermore, the transmission housing of this invention has grooves, further reducing the longitudinal space occupied by the filter. Attached Figure Description

[0026] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. In the drawings:

[0027] Figure 1 This is a schematic diagram of the side structure of the mesh filter of the present invention;

[0028] Figure 2 This is a schematic diagram of the three-dimensional structure of the mesh filter of the present invention;

[0029] Figure 3 This is a schematic diagram of the steel pipe of the present invention;

[0030] Figure 4 This is a schematic diagram of the transmission housing of the present invention;

[0031] Among them, 1. steel pipe; 2. pipe fitting; 3. screw plug; 4. first sealing ring; 5. second sealing ring; 6. filter screen; 7. neck; 8. magnet; 9. shell recess; 10. shell; 11. flare. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0033] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] The present invention will now be described in detail with reference to the accompanying drawings.

[0036] like Figures 1 to 3 As shown, a mesh filter of the present invention includes a steel pipe 1 and a magnet 8.

[0037] One end of the steel pipe 1 is connected to a pipe fitting 2, and the other end is connected to a screw plug 3. An oil suction port is formed on the wall of the steel pipe 1, and a filter screen 6 is connected to the oil suction port. The connection strength between the filter screen 6 and the oil suction port is greater than 20N. Optionally, the connection between the filter screen 6 and the oil suction port is welding.

[0038] Specifically, steel pipe 1 conforms to the requirements of GB / T 8163 "Seamless steel pipes for conveying fluids", and the wall thickness of steel pipe 1 is 0.8mm to 2mm.

[0039] A neck 7 is provided on the steel pipe 1. The neck 7 is positioned between the filter screen 6 and the magnet 8, and the diameter of the neck 7 is smaller than the minimum diameter of the magnet 8 to prevent the magnet 8 from falling into the steel pipe 1. The magnet 8 is located inside the steel pipe 1 near the end of the neck 7, and the magnet 8 is closer to the port of the steel pipe 1 than the neck 7. The magnet 8 is fixed to the inner wall of the steel pipe 1 by adhesive bonding. A flared end 11 is provided on the end of the steel pipe 1 away from the magnet 8.

[0040] Optionally, the filter screen 6 has a mesh size of 24.

[0041] Optionally, the magnet 8 is bar-shaped.

[0042] Optionally, the magnet 8 is fixed to the inner wall of the steel pipe 1 by adhesive.

[0043] like Figure 4 As shown, a gearbox of the present invention includes a mesh filter and a housing 10. The bottom of the housing 10 is provided with two mating holes, and a housing recess 9 is provided between the two mating holes. The diameter of the flared opening 11 is smaller than the diameter of the pipe connector 2, and the diameter of the flared opening 11 is larger than the diameter of the mating holes of the housing 10.

[0044] The pipe joint 2 is provided with a first sealing ring 4, and the screw plug 3 is provided with a second sealing ring 5. Specifically, both the first sealing ring 4 and the second sealing ring 5 are O-rings.

[0045] Specifically, one end of the steel pipe 1 with the flared end 11 is pressurized and fixed to the housing 10, while the other end is clearance-fitted to the housing 10. This allows the steel pipe 1 to be fixed both axially and radially, eliminating the need for installation bolts and thus saving space.

[0046] The assembly method of the gearbox includes the following steps:

[0047] Insert the end of the steel pipe 1 closest to the magnet 8 into the mating seat hole of the housing 10 until the flared end 11 is pressed into the mating seat hole of the housing 10;

[0048] Keep the filter screen 6 facing downwards and tighten the screw plug 3 and pipe connector 2;

[0049] Seal the screw plug 3 and the pipe joint 2.

[0050] The mesh filter is installed at the bottom of the housing, ensuring normal oil suction function even at low oil levels. It has low depth requirements for the housing 10, saving longitudinal space and facilitating space arrangement during vehicle loading. The recessed platform 9 in the housing further lowers the position of the filter screen 6, allowing for normal operation even at low oil levels, facilitating assembly, and saving axial space in the gearbox. The magnet 8 is positioned using the neck 7 and the screw plug 3, preventing axial movement due to weak adhesion.

[0051] In a transmission according to the present invention, when in use, oil enters the mesh filter from the bottom of the housing 10 through the filter screen 6, iron impurities are attracted by the magnet 8, and the filtered oil enters the transmission system through the pipe joint 2.

[0052] Unless otherwise specified, the equipment components involved in the above embodiments are all conventional equipment components, and the structural settings, working methods or control methods involved are all conventional settings, working methods or control methods in the art unless otherwise specified.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention, as long as they do not depart from the spirit and scope of the technical solutions of the present invention, should be covered within the scope of the claims of the present invention.

Claims

1. A gearbox, characterized in that, Includes a mesh filter and a housing (10), the mesh filter comprising: A steel pipe (1), one end of which is connected to a pipe joint (2) and the other end is connected to a screw plug (3); a magnet (8), which is disposed inside the steel pipe (1); an oil suction port, which is opened on the pipe wall of the steel pipe (1); wherein, a filter screen (6) is connected to the oil suction port, the magnet (8) is disposed at the end of the steel pipe (1), and a neck (7) is provided on the steel pipe (1), the neck (7) being disposed between the filter screen (6) and the magnet (8); the diameter of the neck (7) is smaller than the minimum diameter of the magnet (8); a flared end (11) is provided on the end of the steel pipe (1) away from the magnet (8); The housing (10) is provided with two mating holes, and a housing recess (9) is provided between the two mating holes. The steel pipe (1) matches the housing recess (9). One end of the steel pipe (1) with a flared end (11) is pressurized and fixed to the housing (10), and the other end is clearance-fitted to the housing (10).

2. The gearbox according to claim 1, characterized in that, The filter screen (6) has a mesh size of 24.

3. A gearbox according to claim 1, characterized in that, The magnet (8) is bar-shaped.

4. A gearbox according to claim 1, characterized in that, The magnet (8) is fixed to the inner wall of the steel pipe (1) by adhesive bonding.

5. A gearbox according to claim 1, characterized in that, The connection strength between the filter screen (6) and the oil suction port is greater than 20N.

6. A gearbox according to claim 1, characterized in that, The pipe joint (2) is provided with a first sealing ring (4).

7. A gearbox according to claim 1, characterized in that, A second sealing ring (5) is provided outside the screw plug (3).

8. A method for assembling a gearbox according to any one of claims 1 to 7, characterized in that, Includes the following steps: Insert the end of the steel pipe (1) close to the magnet (8) into the mating seat hole of the housing (10) until the flared end (11) is pressed into the mating seat hole of the housing (10); Keep the filter screen (6) facing down and tighten the screw plug (3) and pipe joint (2); Seal the screw plug (3) and the pipe fitting (2).

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