Oil pump with double oil inlets

Abstract

The utility model provides an oil pump with double oil inlets, which comprises a pump body, a driving gear and a driven gear, the pump body is provided with a pump cavity, a first oil inlet, a first oil inlet cavity, a second oil inlet, a second oil inlet cavity, an oil outlet cavity and an oil outlet, the driving gear and the driven gear are arranged in the pump cavity, the first oil inlet cavity corresponds to the driving gear, and the second oil inlet cavity corresponds to the second oil inlet cavity. The second oil inlet cavity corresponds to the driven gear; a spacing part is arranged between the first oil inlet cavity and the second oil inlet cavity, a first sealing surface is formed in the position, corresponding to the driving gear, of the spacing part, and a second sealing surface is formed in the position, corresponding to the driven gear, of the spacing part; the oil outlet cavity corresponds to the meshed position of the two gears, a third sealing face is formed in the position, corresponding to the driving gear, of the pump body part located between the first oil inlet cavity and the oil outlet cavity, and a fourth sealing face is formed in the position, corresponding to the driving gear, of the pump body part located between the second oil inlet cavity and the oil outlet cavity. According to the technical scheme, when one oil inlet sucks air, the other oil inlet can normally suck oil.

Description

Technical Field

[0001] The utility model relates to the technical field of internal combustion engine lubrication, and particularly relates to an oil pump with double inlet ports. Background Art

[0002] In some special engines, there are at least two parts where the oil needs to be pumped by an oil pump to ensure the normal circulation of the oil. Moreover, the oil volume at these oil suction points is unstable, and there may be a situation where the oil suction is emptied. This determines that a common oil pump cannot be directly divided into multiple oil suction ports for oil suction. Otherwise, as long as one oil suction port is emptied, the other oil suction ports will lose their oil suction capacity.

[0003] For the above situation, the conventional solutions are as follows: 1) using multiple independent oil pumps; 2) using multi-stage oil pumps, such as two-stage pumps and three-stage pumps; 3) using a three-tooth pump, which is equivalent to a two-stage pump. However, these solutions generally have the disadvantages of complex structures, occupying a large amount of space, being very troublesome to design and arrange, and having a very high cost. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide an oil pump with double inlet ports and a simple structure.

[0005] The technical solution of the utility model regarding the oil pump with double inlet ports is as follows: An oil pump with double inlet ports includes a pump body, a driving gear, and a driven gear. The pump body is provided with a pump chamber, a first inlet port, a first inlet chamber, a second inlet port, a second inlet chamber, an outlet chamber, and an outlet port. The driving gear and the driven gear are rotatably disposed in the pump chamber. The first inlet chamber corresponds to the driving gear, and the second inlet chamber corresponds to the driven gear. There is a spacer between the first inlet chamber and the second inlet chamber. A first sealing surface is formed at the position of the spacer corresponding to the driving gear, and a second sealing surface is formed at the position of the spacer corresponding to the driven gear. The outlet chamber corresponds to the meshing position of the two gears. A third sealing surface is formed at the position of the pump body part between the first inlet chamber and the outlet chamber corresponding to the driving gear, and a fourth sealing surface is formed at the position of the pump body part between the second inlet chamber and the outlet chamber corresponding to the driving gear. All four sealing surfaces are arc-shaped walls.

[0006] Preferably, the first sealing surface and the third sealing surface are located on the same circumferential line, and the second sealing surface and the fourth sealing surface are located on the same circumferential line.

[0007] Preferably, the first sealing surface and the second sealing surface are connected in a "human" shape.

[0008] In one embodiment, the lengths of the first sealing surface and the second sealing surface are equal, and the lengths of the third sealing surface and the fourth sealing surface are equal.

[0009] In one embodiment, the lengths of the third sealing surface and the fourth sealing surface are greater than the lengths of the first sealing surface and the second sealing surface.

[0010] The oil pump provided by the present utility model is an improvement on the basis of a common two-tooth pump. After adding an oil inlet, two sealing surfaces are added between the two gears to isolate the two oil inlets. In this way, when one oil inlet is sucked empty, the other oil inlet can still suck oil normally, and no additional parts need to be added. Only the pump body needs to be improved by adding an oil inlet. Therefore, it has the advantages of simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of an oil pump with a double oil inlet in an embodiment of the present utility model;

[0012] The reference numerals are:

[0013] 1, pump body; 2, driving gear; 3, driven gear; 11, first oil inlet; 12, second oil inlet; 13, oil outlet; 21, first sealing surface; 22, second sealing surface; 23, third sealing surface; 24, fourth sealing surface; 31, first oil inlet cavity; 32, second oil inlet cavity; 33, oil outlet cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] For the convenience of those skilled in the art to understand, the present utility model will be further described below in conjunction with the embodiments and the drawings. The content mentioned in the embodiments does not limit the present utility model.

[0015] It should be noted in advance that in the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0016] Such as Figure 1Shown is an oil pump with double inlet ports, including a pump body 1, a driving gear 2, and a driven gear 3. The pump body 1 is provided with a pump chamber, a first inlet port 11, a first inlet chamber 31, a second inlet port 12, a second inlet chamber 32, an outlet chamber 33, and an outlet port 13. The driving gear 2 and the driven gear 3 are rotatably placed in the pump chamber. The first inlet chamber 31 corresponds to the driving gear 2, and the second inlet chamber 32 corresponds to the driven gear 3. There is a spacer between the first inlet chamber 31 and the second inlet chamber 32. A first sealing surface 21 is formed at the position of the spacer corresponding to the driving gear 2, and a second sealing surface 22 is formed at the position of the spacer corresponding to the driven gear 3. The outlet chamber 33 corresponds to the meshing position of the two gears. The pump body part between the first inlet chamber 31 and the outlet chamber 33 forms a third sealing surface 23 at the position corresponding to the driving gear 2, and the pump body part between the second inlet chamber 32 and the outlet chamber 33 forms a fourth sealing surface 24 at the position corresponding to the driving gear 2. All four sealing surfaces are arc-shaped walls. The first sealing surface 21 and the third sealing surface 23 are located on the same circumference, and the second sealing surface 22 and the fourth sealing surface 24 are located on the same circumference. The first sealing surface 21 and the second sealing surface 22 are connected in a "human" shape. The lengths of the first sealing surface 21 and the second sealing surface 22 are equal, and the lengths of the third sealing surface 23 and the fourth sealing surface 24 are equal. The lengths of the third sealing surface 23 and the fourth sealing surface 24 are greater than the lengths of the first sealing surface 21 and the second sealing surface 22.

[0017] When the oil pump is operating, the oil sucked in through the first inlet port 11 enters the outlet chamber 33 through the side clearance between the driving gear 2 and the third sealing surface 23, and the oil sucked in through the second inlet port 12 enters the outlet chamber 33 through the side clearance between the driven gear 3 and the fourth sealing surface 24. The two inlet channels do not interfere with each other. After converging in the outlet chamber 33, they are together transported to the engine oil passage through the outlet port 13, thus enabling an oil pump to suck oil from two different positions, and when one inlet port is emptied, the other inlet port can suck oil normally.

[0018] The oil pump provided in this embodiment is an improvement on the basis of a common two-tooth pump. It does not require additional parts. Only the pump body needs to be improved by adding one more inlet port. Therefore, it has the advantages of simple structure and low cost.

[0019] In order to enable those of ordinary skill in the art to more conveniently understand the improvements of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified. In addition, the above embodiments are the preferred implementation schemes of the present invention. Besides, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. An oil pump with double oil inlets, comprising a pump body (1), a driving gear (2), and a driven gear (3), characterized in that: The pump body (1) is provided with a pump chamber, a first oil inlet (11), a first oil inlet chamber (31), a second oil inlet (12), a second oil inlet chamber (32), an oil outlet chamber (33) and an oil outlet (13). The driving gear (2) and the driven gear (3) are rotatably disposed in the pump chamber. The first oil inlet chamber (31) corresponds to the driving gear (2), and the second oil inlet chamber (32) corresponds to the driven gear (3). There is a spacer between the first oil inlet chamber (31) and the second oil inlet chamber (32). A first sealing surface (21) is formed at the position of the spacer corresponding to the driving gear (2), and a second sealing surface (22) is formed at the position of the spacer corresponding to the driven gear (3). The oil outlet chamber (33) corresponds to the meshing position of the two gears. A third sealing surface (23) is formed at the position of the pump body part between the first oil inlet chamber (31) and the oil outlet chamber (33) corresponding to the driving gear (2), and a fourth sealing surface (24) is formed at the position of the pump body part between the second oil inlet chamber (32) and the oil outlet chamber (33) corresponding to the driving gear (2). All four sealing surfaces are arc-shaped walls.

2. The oil pump with double oil inlets according to claim 1, characterized in that: The first sealing surface (21) and the third sealing surface (23) are located on the same circumferential line, and the second sealing surface (22) and the fourth sealing surface (24) are located on the same circumferential line.

3. The oil pump with double oil inlets according to claim 2, characterized in that: The first sealing surface (21) and the second sealing surface (22) are connected to form a "human" shape.

4. The oil pump with double oil inlets according to claim 2, characterized in that: The lengths of the first sealing surface (21) and the second sealing surface (22) are equal, and the lengths of the third sealing surface (23) and the fourth sealing surface (24) are equal.

5. The oil pump with double oil inlets according to claim 4, characterized in that: The lengths of the third sealing surface (23) and the fourth sealing surface (24) are greater than the lengths of the first sealing surface (21) and the second sealing surface (22).

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