Cover and shell connected gear type oil pump

Abstract

The utility model relates to the technical field of oil pumps, in particular to a cover and shell connected gear type oil pump which comprises an outer shell, a cover body and an auxiliary assembly, the cover body is fixedly connected with the surface of the outer shell, an oil inlet pipe is arranged on the cambered surface of the outer shell, an oil outlet hole is formed in the lower surface of the outer shell, and the auxiliary assembly is arranged on the surface of the oil inlet pipe. The auxiliary assembly comprises a filtering unit, the filtering unit comprises a connecting pipe, the connecting pipe is fixedly connected with the surface of the oil inlet pipe, a positioning baffle ring is fixedly connected to the inner wall of the connecting pipe, a filter screen is installed on the inner wall of the connecting pipe, and a connecting pipe is fixedly connected to the outer circumference of the connecting pipe; and cleaning holes are formed in the inner wall of the connecting pipe. According to the oil pump, by arranging the auxiliary assembly, a worker can conveniently clean the filter screen, then the problems that after the filter screen is blocked by impurities, the cleaning difficulty is high, and the cost is high are solved, and the maintenance efficiency and convenience of the oil pump are further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pumps, in particular to a cover-shell integrated gear type oil pump. Background Art

[0002] The oil pump is a key component in the engine lubrication system. Its main function is to suck the oil from the oil pan and deliver it to various friction parts of the engine under pressure to reduce wear, cool and clean moving parts.

[0003] Prior art, such as the utility model with publication number CN201568710U, discloses a cover-shell integrated gear-type oil pump, which is composed of a pump body, a pump cover, a driven shaft, a driven gear, a driving shaft, a driving gear, a transmission gear and a cover shell. The pump cover is fixed to the gear cavity of the pump body by screws, the driven shaft is installed in the driven shaft holes of the pump body and the pump cover, the driven gear is installed on the driven shaft in the gear cavity of the pump body, and an interference fit is adopted with the driven shaft, the driving shaft is installed in the driving shaft holes of the pump body and the pump cover, and the driving gear is installed in the driven shaft. The driving shaft in the gear cavity of the pump body is meshed with the driven gear in the gear cavity of the pump body. The transmission gear is installed on the driving shaft on the pump cover and has an interference fit with the driving shaft. In order to prevent oil leakage due to poor sealing at the connection between the pump body and the cover shell, the pump body and the cover shell are designed as an integral component to solve the problem that the pump body and the cover shell of the existing gear type oil pump are separated. When the pump body and the cover shell are connected, the sealing requirements of the connection parts are very strict. If the technical requirements are not met, serious quality problems such as oil leakage at the connection parts will occur.

[0004] In the process of pumping oil with the help of an oil pump, most of the oil pumps currently on the market have a filter screen usually arranged inside the oil pump housing. Since the filter screen will filter impurities in the oil during use, when the service life of the filter screen is long, it is very easy to be blocked by the filtered impurities, thereby causing the oil passing rate to be greatly reduced. When maintenance personnel want to disassemble and maintain it, they must also remove the oil pump housing. In view of the cumbersome disassembly operation of the oil pump, this makes maintenance personnel face higher maintenance difficulty and greater cost expenditure when maintaining the filter screen. Utility Model Content

[0005] The purpose of the utility model is to solve the problem in the prior art that when maintenance personnel want to disassemble and maintain the oil pump, they must also remove the housing of the oil pump. In view of the cumbersome disassembly operation of the oil pump, this makes it difficult and costly for maintenance personnel to maintain the filter. A cover-shell integrated gear oil pump is proposed.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a cover-shell integrated gear oil pump, comprising a shell, a cover body and an auxiliary component, the cover body is fixedly connected to the surface of the shell, an oil inlet pipe is arranged on the arc surface of the shell, an oil outlet hole is arranged on the lower surface of the shell, and the auxiliary component is arranged on the surface of the oil inlet pipe;

[0007] The auxiliary component includes a filter unit, the filter unit includes a connecting pipe, the connecting pipe is fixedly connected to the surface of the oil inlet pipe, a positioning retaining ring is fixedly connected to the inner wall of the connecting pipe, a filter screen is installed on the inner wall of the connecting pipe, a connecting pipe is fixedly connected to the outer circumference of the connecting pipe, a cleaning hole is opened on the inner wall of the connecting pipe, and the connecting pipe is connected to the inner wall of the cleaning hole;

[0008] The auxiliary component also includes a connecting unit, which includes an assembly tube, which is fixedly connected to the side surface of the connecting tube, a fixed clamping strip is fixedly connected to the inner wall of the assembly tube, a rubber plug is inserted into the inner wall of the assembly tube, the rubber plug abuts against the side surface of the fixed clamping strip, a threaded extrusion column is threadedly connected to the inner wall of the assembly tube, the threaded extrusion column is fixedly connected to the side surface of the rubber plug, and the side surface of the threaded extrusion column is fixedly connected to a limiting baffle.

[0009] Preferably, a holding protrusion is fixedly connected to the side surface of the limit baffle, and the holding protrusion can be held by maintenance personnel, thereby facilitating the maintenance personnel to rotate the limit baffle.

[0010] Preferably, the connecting pipe is connected to the inner wall of the oil outlet hole, and the positioning retaining ring is connected to the inner wall of the connecting pipe. The inner diameter of the positioning retaining ring is smaller than the inner diameter of the connecting pipe. The position of the filter can be limited by the positioning retaining ring, so that after the filter is assembled, the position of its filtering surface is on the same horizontal plane as the bottom of the cleaning hole.

[0011] Preferably, the filter is in contact with the surface of the positioning retaining ring, the filter is connected to the inner wall of the positioning retaining ring, and the filter is connected to the inner wall of the connecting pipe. The filter can be used to filter the oil entering the oil inlet pipe with the cooperation of the connecting pipe to reduce the probability of impurities in the oil entering the pump body.

[0012] Preferably, the assembly pipe is communicated with the inner wall of the connecting pipe, and the connecting pipe allows maintenance personnel to install the assembly pipe, while ensuring that the assembly pipe and the cleaning hole are in a connected state.

[0013] Preferably, there are two fixing strips, which are arranged in a circular array about the assembly tube. The fixing strips are arc-shaped, and the position of the rubber plug can be constrained by the fixing strips, so that during the tightening process, the threaded extrusion column can cooperate with the fixing strips to extrude the rubber plug, so that the rubber plug seals the inner wall of the assembly tube.

[0014] Preferably, the limit baffle abuts against the side surface of the assembly tube, and the diameter of the limit baffle is larger than the diameter of the threaded extrusion tube. The rubber plug can be squeezed through the threaded extrusion tube under the operation of maintenance personnel to ensure that the rubber plug can stably seal the assembly tube.

[0015] Compared with the prior art, the advantages and positive effects of the utility model are:

[0016] In the utility model, by setting an auxiliary component, when the oil pump is working, the engine oil enters the chamber of the shell through the oil inlet pipe, the gears installed inside the shell mesh with each other, and send the engine oil to the oil outlet hole, and the engine oil is pumped into the engine through the oil outlet hole; before the engine oil enters the oil inlet pipe, the engine oil first enters the filtering area formed by the connecting pipe and the filter screen, and the engine oil gradually passes through the filter screen under the guidance of the connecting pipe, and the filter screen filters the passed engine oil, and the filtered engine oil enters the oil inlet pipe through the connecting pipe, and at the same time, the filtered impurities remain on the filtering surface of the filter screen. When the maintenance personnel need to clean the filtering surface of the filter screen, they rotate the holding protrusion counterclockwise , the holding protrusion cooperates with the limit baffle to rotate the threaded extrusion column, the threaded extrusion column is gradually screwed out of the assembly tube, and the rubber plug is gradually separated from the assembly tube under the pull of the threaded extrusion column. After the threaded extrusion column is removed, pull the holding protrusion outward to ensure that the rubber plug is completely separated from the assembly tube. After the assembly tube is opened, the staff can clean the filtering surface of the filter through the cleaning cavity formed by the assembly tube, the connecting tube and the cleaning hole. By setting up auxiliary components, it is convenient for the staff to clean the filter, thereby reducing the problem of difficult and costly cleaning after the filter is blocked by impurities, and further improving the maintenance efficiency and convenience of the oil pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model provides a three-dimensional structural schematic diagram of a cover-shell integrated gear-type oil pump;

[0018] Figure 2 The utility model provides a schematic diagram of the structure of a cover-shell integrated gear-type oil pump from a bottom view;

[0019] Figure 3 The utility model provides a schematic diagram of the auxiliary component structure of a cover-shell integrated gear-type oil pump;

[0020] Figure 4The utility model provides a schematic diagram of the bottom view of the auxiliary component of a cover-shell integrated gear-type oil pump;

[0021] Figure 5 The utility model provides a side structural schematic diagram of an auxiliary component of a cover-shell integrated gear-type oil pump.

[0022] Legend:

[0023] 1. Shell; 2. Cover; 3. Oil inlet pipe; 4. Oil outlet hole; 5. Auxiliary components; 51. Filter unit; 511. Connecting pipe; 512. Positioning retaining ring; 513. Filter screen; 514. Connecting pipe; 515. Cleaning hole; 52. Connecting unit; 521. Assembly pipe; 522. Fixing strip; 523. Rubber plug; 524. Threaded extrusion column; 525. Limit baffle; 526. Holding protrusion. DETAILED DESCRIPTION

[0024] See also Figure 1-Figure 5 The utility model provides a technical solution: a cover-shell integrated gear oil pump, comprising a shell 1, a cover body 2 and an auxiliary component 5, the cover body 2 is fixedly connected to the surface of the shell 1, an oil inlet pipe 3 is arranged on the arc surface of the shell 1, an oil outlet hole 4 is arranged on the lower surface of the shell 1, and the auxiliary component 5 is arranged on the surface of the oil inlet pipe 3.

[0025] In this embodiment: the auxiliary component 5 includes a filter unit 51, and the filter unit 51 includes a connecting pipe 511, the connecting pipe 511 is fixedly connected to the surface of the oil inlet pipe 3, the inner wall of the connecting pipe 511 is fixedly connected with a positioning retaining ring 512, the inner wall of the connecting pipe 511 is installed with a filter screen 513, the outer circumference of the connecting pipe 511 is fixedly connected with a connecting pipe 514, the inner wall of the connecting pipe 511 is provided with a cleaning hole 515, and the connecting pipe 514 is connected with the inner wall of the cleaning hole 515;

[0026] The auxiliary component 5 also includes a connecting unit 52, which includes an assembly tube 521, which is fixedly connected to the side surface of the connecting tube 514, and a fixed clamping strip 522 is fixedly connected to the inner wall of the assembly tube 521. A rubber plug 523 is inserted into the inner wall of the assembly tube 521, and the rubber plug 523 abuts against the side surface of the fixed clamping strip 522. A threaded extrusion column 524 is threadedly connected to the inner wall of the assembly tube 521, and the threaded extrusion column 524 is fixedly connected to the side surface of the rubber plug 523, and a limiting baffle 525 is fixedly connected to the side surface of the threaded extrusion column 524.

[0027] Specifically, a holding protrusion 526 is fixedly connected to the side surface of the limit baffle 525 , and the holding protrusion 526 can be held by maintenance personnel, thereby facilitating the maintenance personnel to rotate the limit baffle 525 .

[0028] Specifically, the connecting pipe 511 is connected to the inner wall of the oil outlet hole 4 , the positioning retaining ring 512 is connected to the inner wall of the connecting pipe 511 , and the inner diameter of the positioning retaining ring 512 is smaller than the inner diameter of the connecting pipe 511 .

[0029] In this embodiment, the position of the filter screen 513 can be limited by the positioning retaining ring 512, so that after the filter screen 513 is assembled, the position of its filtering surface is on the same horizontal plane as the bottom of the cleaning hole 515.

[0030] Specifically, the filter screen 513 abuts against the surface of the positioning retaining ring 512, the filter screen 513 is connected to the inner wall of the positioning retaining ring 512, and the filter screen 513 is connected to the inner wall of the connecting pipe 511. Through the filter screen 513, with the cooperation of the connecting pipe 511, the engine oil entering the oil inlet pipe 3 can be filtered to reduce the probability of impurities in the engine oil entering the pump body.

[0031] In this embodiment, the assembly tube 521 is communicated with the inner wall of the connection tube 514 .

[0032] In this embodiment, the connecting tube 514 allows maintenance personnel to install the assembly tube 521 , while ensuring that the assembly tube 521 is in communication with the cleaning hole 515 .

[0033] Specifically, there are two fixed clips 522, which are arranged in a circular array about the assembly tube 521. The fixed clips 522 are arc-shaped, and the position of the rubber plug 523 can be constrained by the fixed clips 522, so that the threaded extrusion column 524 can cooperate with the fixed clips 522 to squeeze the rubber plug 523 during the tightening process, so that the rubber plug 523 seals the inner wall of the assembly tube 521.

[0034] Specifically, the limiting baffle 525 abuts against the side surface of the assembly tube 521 , and the diameter of the limiting baffle 525 is greater than the diameter of the threaded extrusion tube.

[0035] In this embodiment, the rubber plug 523 can be squeezed by the threaded squeezing tube under the operation of maintenance personnel to ensure that the rubber plug 523 can stably seal the assembly tube 521.

[0036] Working principle: when the oil pump is working, the oil enters the chamber of the housing 1 through the oil inlet pipe 3, the gears installed inside the housing 1 mesh with each other, and send the oil to the oil outlet hole 4, and the oil is pumped into the engine through the oil outlet hole 4; before the oil enters the oil inlet pipe 3, the oil first enters the filtering area formed by the connecting pipe 511 and the filter 513, and the oil is guided by the connecting pipe 511 and gradually passes through the filter 513, and the filter 513 filters the passed oil, and the filtered oil enters the oil inlet pipe 3 through the connecting pipe 511, and the filtered impurities remain on the filtering surface of the filter 513. When the maintenance personnel need to clean the filtering surface of the filter 513, they rotate the holding protrusion 526 counterclockwise, and the holding protrusion 526 cooperates with the limit baffle 525 to rotate The threaded extrusion column 524 is moved, and the threaded extrusion column 524 is gradually screwed out of the assembly tube 521. At the same time, the rubber plug 523 is gradually separated from the assembly tube 521 under the pull of the threaded extrusion column 524. After the threaded extrusion column 524 is removed, the holding protrusion 526 is pulled outward to ensure that the rubber plug 523 is completely separated from the assembly tube 521. After the assembly tube 521 is opened, the staff can clean the filtering surface of the filter 513 through the cleaning cavity formed by the assembly tube 521, the connecting tube 514 and the cleaning hole 515. By setting the auxiliary component 5, it is convenient for the staff to clean the filter 513, thereby reducing the problem of difficulty and cost in cleaning after the filter 513 is blocked by impurities, and further improving the maintenance efficiency and convenience of the oil pump.

Claims

1. A cover-shell integrated gear oil pump, comprising a shell (1), a cover (2) and an auxiliary component (5), characterized in that: The cover body (2) is fixedly connected to the surface of the outer shell (1); an oil inlet pipe (3) is provided on the arc surface of the outer shell (1); an oil outlet hole (4) is provided on the lower surface of the outer shell (1); and the auxiliary component (5) is provided on the surface of the oil inlet pipe (3); The auxiliary component (5) comprises a filter unit (51), the filter unit (51) comprises a connecting pipe (511), the connecting pipe (511) is fixedly connected to the surface of the oil inlet pipe (3), a positioning retaining ring (512) is fixedly connected to the inner wall of the connecting pipe (511), a filter screen (513) is installed on the inner wall of the connecting pipe (511), a connecting pipe (514) is fixedly connected to the outer circumference of the connecting pipe (511), a cleaning hole (515) is opened on the inner wall of the connecting pipe (511), and the connecting pipe (514) is connected to the inner wall of the cleaning hole (515); The auxiliary component (5) further comprises a connecting unit (52), wherein the connecting unit (52) comprises an assembly tube (521), wherein the assembly tube (521) is fixedly connected to the side surface of the connecting tube (514), wherein the inner wall of the assembly tube (521) is fixedly connected to a fixing strip (522), wherein a rubber plug (523) is inserted into the inner wall of the assembly tube (521), wherein the rubber plug (523) abuts against the side surface of the fixing strip (522), wherein the inner wall of the assembly tube (521) is threadedly connected to a threaded extrusion column (524), wherein the threaded extrusion column (524) is fixedly connected to the side surface of the rubber plug (523), and wherein the side surface of the threaded extrusion column (524) is fixedly connected to a limiting baffle (525).

2. The cover-shell integrated gear type oil pump according to claim 1, characterized in that: A holding protrusion (526) is fixedly connected to the side surface of the limit baffle (525).

3. The cover-shell integrated gear type oil pump according to claim 1, characterized in that: The connecting pipe (511) is connected to the inner wall of the oil outlet hole (4), the positioning retaining ring (512) is connected to the inner wall of the connecting pipe (511), and the inner diameter of the positioning retaining ring (512) is smaller than the inner diameter of the connecting pipe (511).

4. The cover-shell integrated gear type oil pump according to claim 1, characterized in that: The filter screen (513) is in contact with the surface of the positioning retaining ring (512), the filter screen (513) is in communication with the inner wall of the positioning retaining ring (512), and the filter screen (513) is in communication with the inner wall of the connecting pipe (511).

5. The cover-shell integrated gear type oil pump according to claim 1, characterized in that: The assembly tube (521) is in communication with the inner wall of the connection tube (514).

6. The cover-shell integrated gear type oil pump according to claim 1, characterized in that: The number of the fixed clamping strips (522) is two, and the two fixed clamping strips (522) are arranged in a circular array with respect to the assembly tube (521), and the fixed clamping strips (522) are arc-shaped.

7. The cover-shell integrated gear type oil pump according to claim 1, characterized in that: The limiting baffle (525) abuts against the side surface of the assembly tube (521), and the diameter of the limiting baffle (525) is greater than the diameter of the threaded extrusion tube.

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