CN114754282A

CN114754282A - Improved oil pump for automobile

Info

Publication number: CN114754282A
Application number: CN202210435402.9A
Authority: CN
Inventors: 夏建敏; 邬中华; 黄雷登
Original assignee: Zhejiang Xiaxia Precision Manufacturing Co ltd
Current assignee: Zhejiang Xiaxia Precision Manufacturing Co ltd
Priority date: 2022-04-24
Filing date: 2022-04-24
Publication date: 2022-07-15
Anticipated expiration: 2042-04-24
Also published as: CN114754282B

Abstract

The improved automobile oil pump belongs to the technical field of automobile oil pumps and comprises a cylinder body, wherein an oil cavity is formed in the cylinder body, and a driving gear and a driven gear which are meshed with each other are assembled in the oil cavity. Wherein, the driving gear and the driven gear are elliptic gears. And a pump oil groove is formed in the side wall of the oil cavity, and an oil pumping piece is arranged in the pump oil groove. One end of the oil pumping piece is a joint end facing the oil outlet pipe, and the other end of the oil pumping piece is a control end facing the oil inlet pipe. The oil pumping unit comprises a pump oil tank, a pump oil piece, an oil passage and a joint, wherein the pump oil tank and the pump oil piece are assembled to form the oil passage, and the oil passage comprises an oil inlet located at a control end and an oil outlet located at a joint end. Compared with the prior art, this application adopts oval gear to replace traditional circular gear, greatly increased the machine oil chamber volume. And the gear is provided with an oil delivery structure, the side wall of the cylinder body is provided with an oil pumping piece, oil can be pumped from the side wall of the oil cavity while the oil is pumped from the gear meshing part, and the oil pumping efficiency is greatly improved.

Description

Improved oil pump for automobile

Technical Field

The invention belongs to the technical field of vehicle oil pumps, and particularly relates to an improved vehicle oil pump.

Background

The lubricating system is one of the important components of the automobile and has the functions of continuously conveying engine oil to the friction surfaces of all transmission parts when the engine works and forming an oil film between the friction surfaces to realize liquid friction, so that the friction resistance is reduced, the power consumption is reduced, the abrasion is reduced, and the reliability and the durability of the engine are ensured. In addition, the lubricating system can also take away heat and impurities on the friction surface, the sealing performance of the cylinder is improved, and the effects of plot, cooling, hydraulic pressure, buffering, rust prevention and the like are achieved.

The oil pump in the lubricating system is mainly used for pumping and pressurizing oil from the bottom of a shell and then delivering the oil to the surfaces of various parts for lubrication through an oil passage. The common oil pump at present belongs to a displacement pump, and comprises an external gear pump, an internal meshing cycloid pump, a vane oil pump and the like. The traditional structure of the external gear pump is that a pair of circular external gears are arranged in the pump body, the gear pump of the structure is simple in structure, reliable in operation and low in price, but the volume is small, the structural problem of oil trapping exists, engine oil can only pass through the gear meshing position, and the oil pumping efficiency is limited to a certain degree. Further improvements can be made in terms of pumping efficiency and pumping capacity.

Accordingly, based on some of the above prior art, the present application is making further improvements in terms of pumping efficiency and pumping displacement.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides an improved automobile oil pump, which adopts an elliptic gear to replace a traditional circular gear, thereby greatly increasing the volume of an oil cavity. And the gear is provided with an oil delivery structure, the side wall of the cylinder body is provided with an oil pumping piece, oil can be pumped from the side wall of the oil cavity while the oil is pumped from the gear meshing part, and the oil pumping efficiency is greatly improved.

In order to solve the above technical problems, the present invention is achieved by the following technical means.

An oil pump comprises a cylinder body, wherein an oil cavity is arranged in the cylinder body, and a driving gear and a driven gear which are meshed with each other are assembled in the oil cavity. And an oil inlet pipe and an oil outlet pipe are respectively arranged on two sides of the pump body. Wherein, the driving gear and the driven gear are elliptic gears. The elliptical gear replaces a circular gear in the prior art, so that the volume of the engine oil cavity is greatly increased.

And a pump oil groove is formed in the side wall of the oil cavity, and an oil pumping piece is arranged in the pump oil groove. One end of the oil pumping piece is a joint end facing the oil outlet pipe, and the other end of the oil pumping piece is a control end facing the oil inlet pipe. The oil pumping unit comprises a pump oil tank, a pump oil piece, an oil passage and a joint, wherein the pump oil tank and the pump oil piece are assembled to form the oil passage, and the oil passage comprises an oil inlet located at a control end and an oil outlet located at a joint end. The structure of the oil pumping piece is added, so that an oil pumping path is increased, and the oil pumping efficiency is obviously improved.

When the oil pumping piece is in a default closed state, the attaching end faces one side surface of the engine oil cavity and is flush with the side wall of the engine oil cavity, the control end is higher than the side wall of the engine oil cavity, the oil inlet is opened and communicated with the engine oil cavity, and the oil outlet is closed. When the oil pumping piece is in an opening state, the attaching end is higher than the side wall of the engine oil cavity, the control end faces one side surface of the engine oil cavity and is flush with the side wall of the engine oil cavity, the oil inlet is closed, and the oil outlet is opened to communicate with the engine oil cavity. This application combines the on-off control and the gear revolve of pump oil spare, and when the driving gear tip of driven gear or driving gear rotated to the control end, the laminating end was opened, made the machine oil that is located the pump oil groove get into the engine oil pocket. The oil pumping efficiency is effectively ensured.

In a preferred embodiment, the thickness of the control end is smaller than that of the joint end, and the caliber of the oil inlet is larger than that of the oil outlet. This design makes in the oil duct one side volume near the laminating end little, and one side volume near the control end is big for the efficient of oil feed, the oil speed of producing oil is high.

In a preferred embodiment, the control end is provided with a resilient press block. When the oil pumping piece is opened, the control end is jacked into the oil pumping groove, and the elastic extrusion block extrudes the oil passage space, so that the oil pressure in the oil passage is increased, and the oil outlet speed is increased.

In a preferable embodiment, the width of the oil pumping element is equal to the width of the oil pumping groove, so that the oil in the oil passage is prevented from flowing out from a gap between the oil pumping element and the oil pumping groove, oil pressure loss is caused, and oil outlet efficiency is reduced.

In a preferred embodiment, the oil pumping element is assembled in the oil pumping groove through a reset rotating shaft, so that the oil pumping element can be automatically reset to a default closed state after oil is discharged.

In a preferred embodiment, the driving gear and the driven gear both comprise a gear body, an assembly area is arranged on the gear body, gear tooth areas are symmetrically arranged on two sides of the assembly area, and transmission teeth are arranged on the inner ring of each gear tooth area; and an oil feeding structure is arranged in the assembling area. The driving gear and the driven gear are in meshing transmission through transmission teeth, and oil feeding structures on the driving gear and the driven gear are matched to pump oil.

In a preferred embodiment, the oil feeding structure comprises an oil feeding ring, the inner side of the oil feeding ring is annularly provided with a fixing projection, and the assembly area is internally provided with a corresponding fixing groove. The cooperation of fixed bulge and fixed slot enables to send oily structure to fix on the wheel body, avoids sending the relative movement of oily structure and wheel body.

In a preferred embodiment, the oil feeding ring is annularly provided with oil feeding teeth on the outer side surface, and the tooth width of the oil feeding teeth is smaller than that of the transmission teeth. The oil feeding teeth and the transmission teeth of the driven gear and the driving gear can be matched with the side wall of the oil cavity to form a closed oil storage cavity, so that the oil pumping efficiency is greatly improved.

In a preferred embodiment, the oil delivery structure is made of a soft material. The oil delivery structure made of soft materials can provide reliable sealing performance, and the pumping speed of engine oil in the oil storage cavity can be increased by utilizing the elastic action when the gear is disengaged. The height of the oil feeding teeth is larger than that of the transmission teeth, and the oil feeding teeth of the driven gear and the driving wheel are not interfered with each other. The oil delivery tooth at the meshing position is bent due to the fact that the oil delivery tooth abuts against the end face of the transmission tooth root, and the volume of the oil storage cavity is increased.

In a preferred embodiment, the cylinder body comprises a pump body, and the oil inlet pipe and the oil outlet pipe are used for connecting corresponding device interfaces. The upper portion of the pump body is provided with an upper cover plate, and the lower portion of the pump body is provided with a lower cover plate. The cylinder body is designed in a separated mode, and production, processing and later maintenance are facilitated.

Compared with the prior art, the method has the following beneficial effects: the oil pump adopts the elliptic gear to replace the traditional circular gear, and greatly increases the volume of the oil cavity. And the gear is provided with an oil delivery structure, the side wall of the cylinder body is provided with an oil pumping piece, oil can be pumped from the side wall of the oil cavity while oil is pumped from the gear meshing position, and the oil pumping efficiency is greatly improved.

Drawings

Fig. 1 is a perspective view of the present application.

Fig. 2 is a schematic half-section view of the cylinder body.

Fig. 3 is a plan view schematically showing a closed state of the oil pumping member.

Fig. 4 is a plan view schematically showing an open state of the oil pumping member.

Fig. 5 is a perspective partial sectional view of the wheel body.

Fig. 6 is a plan sectional view of the engagement between the driven gear and the driving gear.

The following are the numerical descriptions of the figures in this application:

1. a cylinder body; 11. a pump body; 12. an upper cover plate; 13. a lower cover plate; 14. an oil inlet pipe; 15. an oil outlet pipe;

2. an engine oil cavity; 21. a pump oil sump; 22. an oil passage; 23. an oil inlet; 24. an oil outlet;

3. a driving gear;

4. a driven gear;

5. a wheel body; 51. an assembly area; 52. a gear tooth area; 53. fixing grooves; 54. a transmission gear;

6. an oil delivery structure; 61. an oil feeding ring; 62. a fixed protrusion; 63. oil delivery teeth;

7. an oil pumping member; 71. a fitting end; 72. a control end; 73. an elastic extrusion block; 74. and resetting the rotating shaft.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

The embodiments described below by referring to the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout, are exemplary only for explaining the present invention and are not construed as limiting the present invention.

In describing the present invention, it is to be understood that the terms: the terms center, longitudinal, lateral, length, width, thickness, up, down, front, back, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing and simplifying the description, and thus, should not be construed as limiting the present invention. Furthermore, the terms: first, second, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features shown. In the description of the present invention, unless explicitly specified or limited otherwise, the terms: mounting, connecting, etc. should be understood broadly, and those skilled in the art will understand the specific meaning of the terms in this application as they pertain to the particular situation.

Referring to fig. 1 to 6, an oil pump includes a cylinder 1, and the cylinder 1 includes a pump body 11, an upper cover plate 12 assembled to an upper portion of the pump body 11, and a lower cover plate 13 assembled to a lower portion of the pump body 11. The pump body 11, the upper cover plate 12 and the lower cover plate 13 are assembled and fixed through bolts. The cylinder body 1 is designed in a separated mode, and production, processing and later maintenance are facilitated. The pump body 11, the upper cover plate 12 and the lower cover plate 13 are assembled to form an engine oil chamber 2 inside, and the engine oil chamber 2 is provided with a driving gear 3 and a driven gear 4 which are meshed. An oil inlet pipe 14 and an oil outlet pipe 15 are respectively arranged on two sides of the pump body 11, and the oil inlet pipe 14 and the oil outlet pipe 15 are used for being connected with corresponding device interfaces. The wheel shaft of the driving gear 3 extends out of the upper cover plate 12 and is externally connected with a motor for driving.

As shown in fig. 2, the driving gear 3 and the driven gear 4 are elliptical gears. This application replaces prior art's round gear through oval gear, greatly increased 2 volumes in machine oil chamber.

The specific structure of the driving gear 3 and the driven gear 4 refers to fig. 5: the driving gear 3 and the driven gear 4 both comprise a gear body 5, an assembly area 51 is arranged on the gear body 5, gear tooth areas 52 are symmetrically arranged on two sides of the assembly area 51, and transmission teeth 54 are arranged in the gear tooth areas 52; the assembly area 51 is provided with an oil feed structure 6. The driving gear 3 and the driven gear 4 are in meshing transmission through the transmission gear 54, and the oil feeding structures 6 on the driving gear 3 and the driven gear 4 are matched for pumping oil. The oil feeding structure 6 comprises an oil feeding ring 61, a fixing protrusion 62 is annularly arranged on the inner side of the oil feeding ring 61, and a corresponding fixing groove 53 is arranged in the assembly area 51. The cooperation of the fixing protrusion 62 and the fixing groove 53 enables the oil feeding structure 6 to be fixed on the wheel body 5, so as to prevent the relative movement between the oil feeding structure 6 and the wheel body 5. The outer side surface of the oil feeding ring 61 is annularly provided with oil feeding teeth 63, and the tooth width of the oil feeding teeth 63 is smaller than that of the transmission teeth 54. The oil feeding teeth 63 and the transmission teeth 54 of the driven gear 4 and the driving gear 3 can be matched with the side wall of the engine oil cavity 2 to form a closed oil storage cavity, so that the oil pumping efficiency is greatly improved.

In particular, the oil feeding structure 6 is made of a soft material. The oil feeding structure 6 made of soft materials can provide reliable sealing performance and improve the pumping speed of engine oil in the oil storage cavity when the gear is disengaged. The tooth height of the oil feeding teeth 63 is larger than that of the transmission teeth 54, the oil feeding teeth 63 of the driven gear 4 and the driving wheel are not interfered with each other, so that the oil feeding teeth 63 at the meshing position are bent due to the fact that the oil feeding teeth 63 abut against the end faces of the transmission teeth 54, and the volume of an oil storage cavity is increased. The method specifically comprises the following steps: when the driving gear 3 and the driven gear 4 are meshed and rotate, the oil feeding teeth 63 deflect to the direction opposite to the rotation direction of the gears under the rotation action and abut against the surface of the oil feeding ring 61, so that the volume of an oil storage cavity is increased, and the oil pumping efficiency is further improved.

The essential features of the present application that differ from the prior art are: and a plurality of pump oil grooves 21 are formed in the side wall of the engine oil cavity 2, and an oil pumping piece 7 is arranged in each pump oil groove 21. One end of the oil pumping member 7 is a joint end 71 facing the oil outlet pipe 15, and the other end of the oil pumping member 7 is a control end 72 facing the oil inlet pipe 14. The pump oil groove 21 and the pump oil member 7 are assembled to form an oil passage 22, and the oil passage 22 includes an oil inlet 23 at the control end 72 and an oil outlet 24 at the fitting end 71. The structure of the oil pumping piece 7 is added, so that an oil pumping path is increased, and the oil pumping efficiency is obviously improved. The structure and the switching state thereof refer to fig. 2 to 4.

In this embodiment, the thickness of the control end 72 is smaller than that of the joint end 71, and the aperture of the oil inlet 23 is larger than that of the oil outlet 24. This design makes one side volume that is close to the laminating end 71 in the oil duct 22 little, and one side volume that is close to control end 72 is big for the efficient of oil feed, the oil speed of producing oil is high. The width of the oil pumping piece 7 is equal to the width of the oil pumping groove 21, so that the phenomenon that engine oil in the oil channel 22 flows out from a gap between the oil pumping piece 7 and the oil pumping groove 21 to cause oil pressure loss and reduce oil outlet efficiency is avoided. The control end 72 is provided with an elastic extrusion block 73. When the oil pumping piece 7 is opened, the control end 72 is pushed into the oil pumping groove 21, the elastic extrusion block 73 is contacted with the bottom of the oil pumping groove 21, and the elastic extrusion block 73 extrudes the space of the oil channel 22, so that the oil pressure in the oil channel 22 is increased, and the oil outlet speed is increased. The oil pumping piece 7 resets through an automatic resetting structure, and specifically comprises: the oil pumping piece 7 is provided with a reset rotating shaft 74, and the reset rotating shaft 74 is rotatably assembled on the side walls of two sides of the oil pumping groove 21, so that the oil pumping piece 7 can be automatically reset to a default closed state after oil outlet.

The oil pumping member 7 is in a closed state when the gear is not attached to the control end 72, as shown in fig. 3, at this time, the surface of one side, facing the engine oil cavity 2, of the attachment end 71 is flush with the side wall of the engine oil cavity 2, the control end 72 is higher than the side wall of the engine oil cavity 2, the oil inlet 23 is opened and communicated with the engine oil cavity 2, and the oil outlet 24 is closed. When the driving gear 3 or the driven gear 4 runs across the attachment end 71 of the oil pumping member 7 and moves to the control end 72 from the attachment end 71 of the oil pumping member 7 against the side wall of the oil cavity 2, the oil pumping member 7 is opened, as shown in fig. 4, the attachment end 71 is higher than the side wall of the oil cavity 2, the control end 72 faces one side surface of the oil cavity 2 and is flush with the side wall of the oil cavity 2, the oil inlet 23 is closed, and the oil outlet 24 is opened to communicate with the oil cavity 2. This application combines the on-off control of pump oil spare 7 with gear revolve, and when the driving gear 54 tip of driven gear 4 or driving gear 3 rotated to control end 72, laminating end 71 opened, made the machine oil that is located pump oil groove 21 get into machine oil pocket 2.

Compared with the prior art, this application adopts oval gear to replace traditional circular gear, greatly increased machine oil cavity 2 volume. An oil delivery structure 6 is arranged on the gear, an oil pumping piece 7 is arranged on the side wall of the cylinder body 1, oil can be pumped from the side wall of the oil cavity 2 while oil is pumped from the gear meshing position, and oil pumping efficiency is greatly improved.

The scope of the present invention includes, but is not limited to, the above embodiments, and the present invention is defined by the appended claims, and any alterations, modifications, and improvements that may occur to those skilled in the art are all within the scope of the present invention.

Claims

1. An oil pump comprises a cylinder body (1), wherein an oil cavity (2) is formed in the cylinder body (1), and a driving gear (3) and a driven gear (4) which are meshed are assembled in the oil cavity (2); an oil inlet pipe (14) and an oil outlet pipe (15) are respectively arranged on two sides of the cylinder body (1); it is characterized in that the preparation method is characterized in that,

the driving gear (3) and the driven gear (4) are elliptic gears;

a pump oil groove (21) is formed in the side wall of the engine oil cavity (2), and an oil pumping piece (7) is arranged in the pump oil groove (21); one end of the oil pumping piece (7) is a joint end (71) facing the oil outlet pipe (15), and the other end of the oil pumping piece (7) is a control end (72) facing the oil inlet pipe (14); the pump oil groove (21) and the pump oil piece (7) are assembled to form an oil channel (22), and the oil channel (22) comprises an oil inlet (23) located at the control end (72) and an oil outlet (24) located at the attaching end (71);

when the oil pumping piece (7) is in a default closed state, the surface of one side, facing the engine oil cavity (2), of the attaching end (71) is flush with the side wall of the engine oil cavity (2), the control end (72) is higher than the side wall of the engine oil cavity (2), the oil inlet (23) is opened and communicated with the engine oil cavity (2), and the oil outlet (24) is closed; when the oil pumping piece (7) is in an opening state, the attaching end (71) is higher than the side wall of the engine oil cavity (2), the surface of one side, facing the engine oil cavity (2), of the control end (72) is flush with the side wall of the engine oil cavity (2), the oil inlet (23) is closed, and the oil outlet (24) is opened and communicated with the engine oil cavity (2).

2. The oil pump according to claim 1, wherein the thickness of the control end (72) is smaller than that of the joint end (71), and the caliber of the oil inlet (23) is larger than that of the oil outlet (24).

3. An oil pump according to claim 2, characterized in that the control end (72) is provided with a resilient pressing block (73).

4. An oil pump according to claim 3, characterized in that the width of the oil pumping member (7) is equal to the width of the oil pumping groove (21).

5. The oil pump according to claim 4, characterized in that the pumping element (7) is fitted in the pump sump (21) by means of a return spindle (74).

6. The oil pump according to claim 1, wherein the driving gear (3) and the driven gear (4) each comprise a wheel body (5), a mounting area (51) is arranged on the wheel body (5), gear areas (52) are symmetrically arranged on two sides of the mounting area (51), and transmission teeth (54) are arranged in the gear areas (52); an oil feeding structure (6) is arranged in the assembling area (51).

7. The oil pump according to claim 6, characterized in that the oil feeding structure (6) comprises an oil feeding ring (61), the inner side of the oil feeding ring (61) is annularly provided with a fixing projection (62), and the assembly area (51) is internally provided with a corresponding fixing groove (53).

8. The oil pump according to claim 7, characterized in that the oil feeding ring (61) is provided with oil feeding teeth (63) on the outer side surface; the tooth width of the oil feeding teeth (63) is smaller than that of the transmission teeth (54).

9. The oil pump according to claim 8, wherein the oil feeding structure (6) is made of a soft material; the tooth height of the oil feeding teeth (63) is larger than that of the transmission teeth (54), and the driven gear (4) and the oil feeding teeth (63) of the driving wheel are not interfered with each other.

10. An oil pump according to claim 1, characterized in that the cylinder (1) comprises a pump body (11), the upper part of the pump body (11) being fitted with an upper cover plate (12), the lower part of the pump body (11) being fitted with a lower cover plate (13).