CN212262544U

CN212262544U - Speed reducer oil pump with efficient filtering and filter convenient to maintain

Info

Publication number: CN212262544U
Application number: CN202021810433.0U
Authority: CN
Inventors: 唐业和; 许仲秋; 刘光明; 佘笑梅
Original assignee: Hunan Oil Pump Co Ltd
Current assignee: Hunan Oil Pump Co Ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-01-01
Anticipated expiration: 2030-08-26

Abstract

The utility model provides a reducer oil pump with high-efficiency filtration and a filter convenient to maintain, which comprises a pump body, a filter component and a first sealing ring; the pump body is provided with a rotor cavity and a through hole for mounting the filter assembly, and the middle part of the through hole is communicated with the rotor cavity through an oil inlet channel; the filter assembly comprises an outer end cover, a second sealing ring, a cylindrical support, a cylindrical screen, a disc-shaped support, a disc-shaped screen and an inner end cover; the outer end cover comprises a cover plate and a hollow piston body, an annular groove for accommodating the second sealing ring is formed in the peripheral surface of the end part of the piston body, an oil inlet hole is formed in the end surface of the piston body, and an oil outlet hole is formed in the middle of the piston body; after the filter assembly is arranged in the through hole, the end part of the piston body on the outer end cover and the inner wall of the through hole are radially sealed through a second sealing ring, and a gap is reserved between the middle part of the piston body and the inner wall of the through hole; the cover plate of the outer end cover is used for sealing the through hole in the pump body, and the cover plate of the outer end cover and the outer end face of the pump body are sealed through the first sealing ring.

Description

Speed reducer oil pump with efficient filtering and filter convenient to maintain

Technical Field

The utility model relates to a derailleur oil pump technical field, concretely relates to take filter equipment's before pump reduction gear oil pump.

Background

The large-scale new energy reducer mainly plays a role in reducing the speed and increasing the torque, and is widely applied to city electric buses. Because the urban electric public transport runs at low speed and heavy load for a long time, and the power device is mostly a rear-mounted rear-drive, the heat dissipation is poor, the abrasion of the motor reducer is larger in all aspects, the oil pump of the reducer mainly provides cooling and lubricating action for a planetary reduction gear, a bearing and the like, the requirement for providing cooling and lubricating oil has higher cleanliness requirement, therefore, a strainer must be added at the oil inlet of the oil pump, impurities are filtered by a strainer of the strainer, the oil sucked by the oil pump is ensured not to contain larger granular impurities as much as possible, the abrasion of the planetary gear, the bearing and other parts can be reduced, the oil inlet efficiency of the oil pump can be influenced when the strainer impurities are accumulated more and more after the use time, at the moment, the filter component can be dismounted after the end surface assembly is dismounted for maintaining the strainer, but the traditional filter is mounted in the reducer, and the end, the motor reducer assembly is of a rear-mounted rear-drive structure, and the front end cover can be detached only by detaching the whole motor reducer assembly.

Therefore, in order to maintain the pre-pump filtering device of the speed reducer oil pump, firstly, the workload of disassembly is very large, secondly, the end cover assembly is difficult to disassemble after gluing, sealant needs to be cleaned after the disassembly, and the cleaned end cover is dried and then glued again and then installed back. The convenience of visible maintenance is poor, and the risk of oil leakage during the secondary assembly of the end cover assembly is high.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model aims at providing a reduction gear oil pump that high efficiency filter and filter are convenient for maintain.

In order to achieve the purpose of the invention, the utility model adopts the following scheme: a speed reducer oil pump with high-efficiency filtering and a filter convenient to maintain comprises a pump cover, a body cover sealing ring, an outer rotor, an inner rotor, a pump body, a filter assembly and a first sealing ring; the pump body is provided with a rotor cavity for mounting an inner rotor and an outer rotor, and a through hole for mounting a filter assembly, and the middle part of the through hole is communicated with the rotor cavity through an oil inlet channel; the filter assembly comprises an outer end cover, a second sealing ring, a cylindrical support, a cylindrical screen, a disc-shaped support, a disc-shaped screen and an inner end cover; the outer end cover comprises a cover plate and a hollow piston body, an annular groove for accommodating the second sealing ring is formed in the peripheral surface of the end part of the piston body, an oil inlet hole is formed in the end surface of the piston body, and an oil outlet hole is formed in the middle of the piston body; after the filter assembly is arranged in the through hole, the end part of the piston body of the outer end cover and the inner wall of the through hole are radially sealed through a second sealing ring, and a gap is reserved between the middle part of the piston body and the inner wall of the through hole; the cover plate of the outer end cover is used for sealing the through hole in the pump body, and the cover plate of the outer end cover and the outer end face of the pump body are sealed through the first sealing ring.

Preferably, the through hole is a stepped hole and comprises an inner small hole section and an outer large hole section; and the end part of the piston body and the inner wall of the small hole section are sealed in the radial direction through a second sealing ring.

Preferably, the cylindrical screen of the filter assembly is designed in a pleated pattern with pleats larger than 40 teeth.

And a sealing ring groove which surrounds the through hole and is used for mounting a first sealing ring is arranged on the outer end face of the pump body.

Furthermore, the pump body is also provided with a ventilating window cover plate.

The utility model has the advantages that: because the end part of the piston body of the outer end cover is radially sealed with the inner wall of the through hole through the second sealing ring, and a gap is reserved between the middle part of the piston body and the inner wall of the through hole, the oil containing impurities in the oil bottom shell in the speed reducer can enter an oil inlet channel through the oil inlet hole, the oil outlet hole, the gap between the middle part of the piston body and the inner wall of the through hole in sequence after being filtered by the cylindrical screen or the disc screen; because the apron of outer end cover is used for the through-hole on the closing cap pump body, and seals through first sealing washer between apron and the pump body outer terminal surface, just so can avoid fluid to leak from the outside end of through-hole.

In a preferred technical scheme, the through hole is designed into a stepped hole and comprises an inner small hole section and an outer large hole section, so that the second sealing ring can be prevented from being scratched by the hole wall when the filter assembly is installed, and the gap between the middle part of the piston body and the inner wall of the through hole can be increased. The cylindrical screen of the filter assembly is designed into a wrinkle pattern, and the wrinkles are larger than 40 teeth, so that the filtering area of the cylindrical screen is increased by about three times compared with that of the traditional cylinder, high-efficiency filtering is realized, and the maintenance period of the filter assembly can be prolonged.

Drawings

Fig. 1 is an exploded schematic view of an oil pump in an embodiment of the present invention;

fig. 2 is a schematic sectional structural view of an oil pump in an embodiment of the present invention;

fig. 3 is a schematic view of a pump body structure in an embodiment of the present invention;

fig. 4 is an exploded view of a filter assembly according to an embodiment of the present invention;

in the figure:

1-pump cover 2-body cover sealing ring 3-external rotor

4-inner rotor 5-pump body 6-ventilating window cover plate

7-filter assembly 8-first sealing ring

51-small hole section 52-big hole section 53-oil inlet channel

71-outer end cap 72-second sealing ring 73-cylinder support 74-cylinder screen 75-disc support 76-disc screen

77 inner end cap 711 piston body 712 annular groove.

Detailed Description

In order to facilitate the understanding of those skilled in the art, the present invention will be further described with reference to the following examples, which are not intended to limit the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or interconnected between two elements, directly or indirectly through intervening media, and the specific meaning of the terms may be understood by those skilled in the art according to their specific situation.

As shown in fig. 1 to 4, a speed reducer oil pump with high filtration efficiency and a filter convenient for maintenance comprises a pump cover 1, a body cover sealing ring 2, an outer rotor 3, an inner rotor 4, a pump body 5, a ventilation window cover plate 6, a filter assembly 7, a first sealing ring 8 and screws for fastening; the pump body is provided with a rotor cavity for mounting an inner rotor and an outer rotor, and a through hole for mounting the filter assembly 7, wherein the through hole is a stepped hole and comprises a small hole section 51 at the inner side and a large hole section 52 at the outer side, and the large hole section 52 is communicated with the rotor cavity through an oil inlet channel 53; filter assembly 7 includes outer end cap 71, second seal ring 72, cylindrical support 73, cylindrical screen 74, disc support 75, disc screen 76, and inner end cap 77; the outer end cover 71 comprises a cover plate and a hollow piston body 711, the outer peripheral surface of the end part of the piston body 711 is provided with an annular groove 712 for accommodating the second sealing ring 72, the end surface of the piston body 711 is provided with an oil inlet, and the middle part of the piston body 711 is provided with an oil outlet; after the filter assembly 7 is installed in the through hole, the end part of the piston body 711 of the outer end cover 71 and the inner wall of the small hole section 51 are radially sealed through the second sealing ring 72, and a gap is reserved between the middle part of the piston body 711 and the inner wall of the large hole section 52; the cover plate of the outer end cover 71 is used for sealing the through hole on the pump body, the cover plate of the outer end cover 71 and the outer end face of the pump body 5 are sealed through the first sealing ring 8, and the outer end face of the pump body is provided with a sealing ring groove 54 which surrounds the through hole and is used for installing the first sealing ring 8.

Because the end part of the piston body 711 of the outer end cover 71 is radially sealed with the inner wall of the small hole section 51 through the second sealing ring 72, and a gap is reserved between the middle part of the piston body 711 and the inner wall of the large hole section 52, the oil containing impurities in the oil bottom shell in the speed reducer can enter the oil inlet channel 53 through the gaps between the oil inlet hole of the piston body 711, the oil outlet hole, the middle part of the piston body 711 and the inner wall of the through hole after being filtered by the cylindrical screen 74 or the disc screen 76; because the cover plate of the outer end cover 71 is used for sealing the through hole on the pump body 5, and the cover plate and the outer end face of the pump body 5 are sealed through the first sealing ring 8, the leakage of oil from the outer side end of the through hole can be avoided.

The above description is only for the preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and although the present invention has been disclosed for the preferred embodiment, it is not intended to limit the form and style of the product of the present invention, and those skilled in the art can make some modifications or modifications to the equivalent embodiment without departing from the scope of the present invention, but all that does not depart from the technical solution of the present invention still fall within the scope of the patent of the present invention.

Claims

1. The utility model provides a reduction gear oil pump that high efficiency filter and filter are convenient for maintain which characterized in that: the pump cover comprises a pump cover (1), a body cover sealing ring (2), an outer rotor (3), an inner rotor (4), a pump body (5), a filter assembly (7) and a first sealing ring (8); the pump body (5) is provided with a rotor cavity for mounting an inner rotor and an outer rotor and a through hole for mounting a filter assembly (7), and the middle part of the through hole is communicated with the rotor cavity through an oil inlet channel (53); the filter assembly (7) comprises an outer end cover (71), a second seal ring (72), a cylindrical support (73), a cylindrical screen (74), a disc support (75), a disc screen (76) and an inner end cover (77); the outer end cover (71) comprises a cover plate and a hollow piston body (711), an annular groove (712) for accommodating the second sealing ring (72) is formed in the peripheral surface of the end part of the piston body (711), an oil inlet hole is formed in the end surface of the piston body (711), and an oil outlet hole is formed in the middle of the piston body (711); after the filter assembly (7) is installed in the through hole, the end part of the piston body (711) of the outer end cover (71) and the inner wall of the through hole are radially sealed through a second sealing ring (72), and a gap is reserved between the middle part of the piston body (711) and the inner wall of the through hole; the cover plate of the outer end cover (71) is used for sealing the through hole in the pump body (5), and the cover plate of the outer end cover (71) and the outer end face of the pump body (5) are sealed through a first sealing ring (8).

2. A retarder oil pump with high filtration efficiency and filter for ease of maintenance as defined in claim 1 wherein: the through hole is a stepped hole and comprises a small hole section (51) at the inner side and a large hole section (52) at the outer side; the end part of the piston body (711) and the inner wall of the small hole section (51) are radially sealed through a second sealing ring (72).

3. A decelerator oil pump with efficient filtering and filter maintenance facilitating as claimed in claim 1 or 2, wherein: the cylindrical screen (74) of the filter assembly (7) is designed in a pleated pattern with pleats larger than 40 teeth.

4. A decelerator oil pump with efficient filtering and filter maintenance facilitating as claimed in claim 1 or 2, wherein: and a sealing ring groove (54) which surrounds the through hole and is used for mounting a first sealing ring (8) is formed in the outer end face of the pump body (5).

5. A decelerator oil pump with efficient filtering and filter maintenance facilitating as claimed in claim 1 or 2, wherein: and the pump body (5) is also provided with a ventilating window cover plate (6).