Electronic oil pump

Abstract

The invention discloses an electronic oil pump, relates to the technical field of electronic oil pumps, and aims to solve the technical problem that a rotating shaft in a current pump body is inconvenient to self-lubricate and install, the electronic oil pump comprises a pump body, and the pump body comprises a pump shell, a top cover and the rotating shaft. A first low-pressure cavity is formed between a second supporting block and a top cover in a pump shell, a second low-pressure cavity is formed between the second supporting block and a partition layer, a third low-pressure cavity is formed between the partition layer and the first supporting block, and a rotating shaft passes through the first low-pressure cavity, the second low-pressure cavity and the third low-pressure cavity, so that when a pump body works, the rotating shaft rotates, and the rotating shaft rotates; the oil injection hole channel forms vacuum, pressure difference is generated, and lubricating oil enters the oil injection hole channel under the action of the pressure difference, then enters a right cavity of the pump body, then enters a third low-pressure cavity through a gap between the first supporting block and the rotating shaft and then enters a second low-pressure cavity through a gap between the separation layer and the rotating shaft. And then the air enters the first low-pressure cavity through a gap between the first supporting block and the rotating shaft.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic oil pumps, and more specifically, to an electronic oil pump. Background Art

[0002] The electronic oil pump is a modern oil pump that achieves oil suction and oil pressure functions through the cooperation of the rotor and the pump body. The rotor in the pump body is mainly driven to rotate by the rotating shaft.

[0003] When installing the rotating shaft in the existing pump body, the rotating shaft is usually supported by setting a bearing in the pump casing so that the rotating shaft can be rotatably installed in the pump casing. This installation method is more troublesome and costly. In view of this, we propose an electronic oil pump. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, meet practical needs, and provide an electronic oil pump to solve the technical problem that the rotating shaft in the current pump body is not convenient for self-lubricating installation.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: an electronic oil pump, comprising a pump body, the pump body comprising a pump casing, a top cover and a rotating shaft, the top cover is arranged on the opening side of the pump casing, the rotating shaft is rotatably arranged inside the pump casing, the rotating shaft is coaxial with the pump casing, a partition layer is arranged inside the pump casing, the inside of the pump casing is divided into a left cavity and a right cavity by the partition layer, a first support block is arranged inside the right cavity, a second support block is arranged inside the left cavity, the rotating shaft sequentially passes through the top cover, the second support block, the partition layer and the first support block, a first low-pressure cavity is formed between the second support block and the top cover, a second low-pressure cavity is formed between the second support block and the partition layer, and a third low-pressure cavity is formed between the partition layer and the first support block;

[0006] The top cover is provided with a first protrusion at the center of one side facing the second support block, and the partition layer is provided with a second protrusion at the center of one side facing the first support block.

[0007] The pump casing of the present invention forms a first low-pressure chamber between the second support block and the top cover, a second low-pressure chamber between the second support block and the partition layer, a third low-pressure chamber between the partition layer and the first support block, and the rotating shaft passes through the first low-pressure chamber, the second low-pressure chamber and the third low-pressure chamber. Therefore, when the pump body is working, lubricating oil can be injected into the pump body, and the lubricating oil first enters the right cavity of the pump body, and then enters the third low-pressure chamber through the gap between the first support block and the rotating shaft, and then enters the second low-pressure chamber through the gap between the partition layer and the rotating shaft, and then enters the first low-pressure chamber through the gap between the first support block and the rotating shaft, and finally enters the gap between the top cover and the rotating shaft. Therefore, the lubricating oil in the first low-pressure chamber, the second low-pressure chamber and the third low-pressure chamber can continuously lubricate the area where the rotating shaft passes through the top cover, the second support block, the partition layer and the first support block, that is, the self-lubricating effect of the rotating shaft installation is realized, and it can be ensured that the rotating shaft can rotate smoothly without a bearing, the rotating shaft installation is more convenient, and the installation cost is reduced. The invention provides a first protrusion in the area where the top cover is located in the first low-pressure chamber, and a second protrusion in the area where the partition layer is located in the third low-pressure chamber, and the rotating shaft passes through the first protrusion and the second protrusion, so that the force bearing surface of the top cover and the partition layer supporting the rotating shaft can be increased, and the stability of the rotating shaft installation can be further guaranteed. In addition, a group of strip grooves connected to the first low-pressure chamber are provided on the inner wall of the first protrusion, and an annular groove is provided at the joint between the second protrusion and the partition layer through-hole. Therefore, the lubricating oil in the first low-pressure chamber will flow into the strip groove. When the rotating shaft rotates, the lubricating oil in the strip groove can continuously lubricate the area where the rotating shaft passes through the first protrusion. The annular groove can store a certain amount of lubricating oil. The lubricating oil stored in the annular groove can continuously penetrate into the area where the rotating shaft passes through the partition layer and the second protrusion. Therefore, the first protrusion and the second protrusion not only firmly support the rotating shaft, but also ensure the self-lubricating effect between the first protrusion and the second protrusion and the rotating shaft, further ensuring the performance of the self-lubricating installation of the rotating shaft.

[0008] Preferably, the first protrusion and the second protrusion are coaxial with the rotating shaft, and the rotating shaft passes through the first protrusion and the second protrusion, the first protrusion is located in the first low-pressure chamber, and the second protrusion is located in the third low-pressure chamber.

[0009] Preferably, a group of strip-shaped slots are formed on the inner wall of the first protrusion, and the strip-shaped slots are connected to the first low-pressure chamber.

[0010] Preferably, an annular notch is provided at the joint between the inner wall of the second protrusion and the through-opening of the pump housing.

[0011] Preferably, an oil injection channel is opened inside the rotating shaft, and the oil injection channel is open at one end facing the top cover. Symmetrical oil outlet channels are opened up and down at one end of the rotating shaft facing away from the top cover, and the oil outlet channels are connected to the oil injection channel.

[0012] Preferably, the oil outlet channel is located on a side of the first support block facing away from the top cover, and the oil outlet channel is communicated with the right cavity, the first low-pressure chamber, the second low-pressure chamber and the third low-pressure chamber.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. A first low-pressure chamber is formed between the second support block and the top cover in the pump housing of the present invention, a second low-pressure chamber is formed between the second support block and the partition layer, a third low-pressure chamber is formed between the partition layer and the first support block, and the rotating shaft passes through the first low-pressure chamber, the second low-pressure chamber and the third low-pressure chamber, and the first low-pressure chamber, the second low-pressure chamber and the third low-pressure chamber are communicated with the oil injection channel. Therefore, when the pump body is working, the rotating shaft rotates, and a vacuum is formed in the oil injection channel to generate a pressure difference. Under the action of the pressure difference, the lubricating oil enters the oil injection channel, and then enters the right cavity of the pump body, and then enters the third low-pressure chamber through the gap between the first support block and the rotating shaft, and then passes through the gap between the partition layer and the rotating shaft. The lubricating oil in the first low-pressure chamber, the second low-pressure chamber and the third low-pressure chamber can continuously lubricate the area where the shaft passes through the top cover, the second support block, the partition layer and the first support block, thereby achieving a self-lubricating effect for the shaft installation, ensuring that the shaft can rotate smoothly without a bearing, making the shaft installation more convenient and reducing the installation cost, thereby solving the technical problem that the shaft in the current pump body is not convenient for self-lubricating installation. Therefore, the shaft in the present invention has the advantage of self-lubrication.

[0015] 2. According to the present invention, a first protrusion is provided in the area where the top cover is located in the first low-pressure chamber, a second protrusion is provided in the area where the partition layer is located in the third low-pressure chamber, and the rotating shaft passes through the first protrusion and the second protrusion, so that the force bearing surface of the top cover and the partition layer supporting the rotating shaft can be increased, and the stability of the rotating shaft installation can be further guaranteed. In addition, a group of strip grooves connected to the first low-pressure chamber are provided on the inner wall of the first protrusion, and an annular groove is provided at the joint between the second protrusion and the through-hole of the partition layer. Therefore, the lubricating oil in the first low-pressure chamber will flow into the strip groove. When the rotating shaft rotates, the lubricating oil in the strip groove can continuously lubricate the area where the rotating shaft passes through the first protrusion. The annular groove can store a certain amount of lubricating oil. The lubricating oil stored in the annular groove can continuously penetrate into the area where the rotating shaft passes through the partition layer and the second protrusion. Therefore, the first protrusion and the second protrusion can ensure the self-lubricating effect between the first protrusion and the second protrusion and the rotating shaft while stably supporting the rotating shaft, thereby further ensuring the performance of the self-lubricating installation of the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the pump casing and the top cover of the present invention;

[0019] Figure 4 It is a schematic diagram of the top cover structure of the present invention.

[0020] Description of the numbers in the figure:

[0021] 1. Pump body; 2. Pump casing; 201. Partition layer; 202. Left cavity; 203. Right cavity; 204. Second raised portion; 205. Annular notch; 3. Top cover; 301. First raised portion; 302. Strip notch; 4. First support block; 5. Second support block; 6. First low-pressure chamber; 7. Second low-pressure chamber; 8. Rotating shaft; 801. Oil filling channel; 802. Oil outlet channel; 9. Third low-pressure chamber. DETAILED DESCRIPTION

[0022] like Figures 1 to 4As shown, the present invention relates to an electronic oil pump, comprising a pump body 1, the pump body 1 comprising a pump housing 2, a top cover 3 and a rotating shaft 8, the top cover 3 is arranged on the opening side of the pump housing 2, the rotating shaft 8 is rotatably arranged inside the pump housing 2, the rotating shaft 8 is coaxial with the pump housing 2, a partition layer 201 is arranged inside the pump housing 2, the interior of the pump housing 2 is divided into a left cavity 202 and a right cavity 203 by the partition layer 201, a first support block 4 is arranged inside the right cavity 203, a second support block 5 is arranged inside the left cavity 202, and the rotating shaft 8 passes through the top cover 3, the second support block 5 in sequence. 5, a first low-pressure chamber 6 is formed between the partition layer 201 and the first support block 4, a second low-pressure chamber 7 is formed between the second support block 5 and the partition layer 201, and a third low-pressure chamber 9 is formed between the partition layer 201 and the first support block 4; an oil injection channel 801 is opened inside the rotating shaft 8, and the oil injection channel 801 is opened at one end facing the top cover 3, and symmetrical oil outlet channels 802 are opened at the upper and lower ends of the rotating shaft 8 facing away from the top cover 3, and the oil outlet channels 802 are connected to the oil injection channel 801; the oil outlet channel 802 is located at the first A support block 4 is on the side facing away from the top cover 3, and the oil outlet channel 802 is connected with the right cavity 203, the first low-pressure cavity 6, the second low-pressure cavity 7 and the third low-pressure cavity 9; when the pump body 1 is working, the shaft 8 rotates, and a vacuum is formed in the oil injection channel 801, generating a pressure difference. Under the action of the pressure difference, the lubricating oil enters the oil injection channel 801, and then enters the right cavity 203 of the pump body 1, and then enters the third low-pressure cavity 9 through the gap between the first support block 4 and the shaft 8, and then enters the second low-pressure cavity through the gap between the partition layer 201 and the shaft 8. 7, then enters the first low-pressure chamber 6 through the gap between the second support block 5 and the rotating shaft 8, and finally enters the gap between the top cover 3 and the rotating shaft 8. Therefore, the lubricating oil in the first low-pressure chamber 6, the second low-pressure chamber 7 and the third low-pressure chamber 9 can continuously lubricate the area where the rotating shaft 8 passes through the top cover 3, the second support block 5, the partition layer 201 and the first support block 4, that is, the self-lubricating effect of the installation of the rotating shaft 8 is achieved, which can ensure that the rotating shaft 8 can rotate smoothly without a bearing, and the installation of the rotating shaft 8 is more convenient and reduces the installation cost.

[0023] In an embodiment of the present invention, a first protrusion 301 is arranged at the center of one side of the top cover 3 facing the second support block 5, and a second protrusion 204 is arranged at the center of one side of the partition layer 201 facing the first support block 4; the first protrusion 301 and the second protrusion 204 are coaxial with the rotating shaft 8, and the rotating shaft 8 passes through the first protrusion 301 and the second protrusion 204, the first protrusion 301 is located in the first low-pressure chamber 6, and the second protrusion 204 is located in the third low-pressure chamber 9; a group of strip grooves 302 are opened on the inner wall of the first protrusion 301, and the strip grooves 302 are connected to the first low-pressure chamber 6; an annular groove 205 is opened at the joint between the inner wall of the second protrusion 204 and the through-hole of the pump casing 2; the first protrusion 301 and the second protrusion 204 can increase the top cover 3 and the separation layer 201 support the bearing surface of the rotating shaft 8, which can further ensure the stability of the installation of the rotating shaft 8. The lubricating oil in the first low-pressure chamber 6 will flow into the strip groove 302. When the rotating shaft 8 rotates, the lubricating oil in the strip groove 302 can continuously lubricate the area of ​​the rotating shaft 8 passing through the first protrusion 301. The annular groove 205 can store a certain amount of lubricating oil. The lubricating oil stored in the annular groove 205 can continuously penetrate into the area of ​​the rotating shaft 8 passing through the separation layer 201 and the second protrusion 204. Therefore, the first protrusion 301 and the second protrusion 204 can ensure the self-lubricating effect between the first protrusion 301 and the second protrusion 204 and the rotating shaft 8 while stably supporting the rotating shaft 8, thereby further ensuring the performance of the self-lubricating installation of the rotating shaft 8.

[0024] Working principle: This embodiment provides an electronic oil pump. First, when the pump body 1 is working, the shaft 8 rotates, a vacuum is formed in the oil injection channel 801, and a pressure difference is generated. Under the action of the pressure difference, the lubricating oil enters the oil injection channel 801, and then enters the right cavity 203 of the pump body 1, and then passes through the gap between the first support block 4 and the shaft 8 to enter the third low-pressure cavity 9, and then passes through the gap between the partition layer 201 and the shaft 8 to enter the second low-pressure cavity 7, and then passes through the second support block 5 The lubricating oil in the first low-pressure chamber 6, the second low-pressure chamber 7 and the third low-pressure chamber 9 can continuously lubricate the area where the shaft 8 passes through the top cover 3, the second support block 5, the partition layer 201 and the first support block 4, that is, the self-lubricating effect of the installation of the shaft 8 is achieved, which can ensure that the shaft 8 can rotate smoothly without a bearing, and the installation of the shaft 8 is more convenient and reduces the installation cost;

[0025] Secondly, the first protrusion 301 and the second protrusion 204 can increase the force-bearing surface of the top cover 3 and the partition layer 201 supporting the rotating shaft 8, which can further ensure the stability of the installation of the rotating shaft 8. The lubricating oil in the first low-pressure chamber 6 will flow into the strip groove 302. When the rotating shaft 8 rotates, the lubricating oil in the strip groove 302 can continuously lubricate the area where the rotating shaft 8 passes through the first protrusion 301. The annular groove 205 can store a certain amount of lubricating oil. The lubricating oil stored in the annular groove 205 can continuously penetrate into the area where the rotating shaft 8 passes through the partition layer 201 and the second protrusion 204. Therefore, the first protrusion 301 and the second protrusion 204 not only firmly support the rotating shaft 8, but also ensure the self-lubricating effect between the first protrusion 301 and the second protrusion 204 and the rotating shaft 8, further ensuring the performance of the self-lubricating installation of the rotating shaft 8.

[0026] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. An electronic oil pump, characterized in that: The pump body (1) comprises a pump casing (2), a top cover (3) and a rotating shaft (8), wherein the top cover (3) is arranged at the opening side of the pump casing (2), the rotating shaft (8) is rotatably arranged inside the pump casing (2), the rotating shaft (8) and the pump casing (2) are coaxial, a partition layer (201) is arranged inside the pump casing (2), the interior of the pump casing (2) is divided into a left cavity (202) and a right cavity (203) by the partition layer (201), and the interior of the right cavity (203) is arranged with a first cavity (202) and a second cavity (203) a support block (4), a second support block (5) is arranged inside the left cavity (202), the rotating shaft (8) passes through the top cover (3), the second support block (5), the partition layer (201) and the first support block (4) in sequence, a first low-pressure chamber (6) is formed between the second support block (5) and the top cover (3), a second low-pressure chamber (7) is formed between the second support block (5) and the partition layer (201), and a third low-pressure chamber (9) is formed between the partition layer (201) and the first support block (4); The top cover (3) is provided with a first protrusion (301) at the center of one side facing the second support block (5), and the partition layer (201) is provided with a second protrusion (204) at the center of one side facing the first support block (4).

2. The electronic oil pump according to claim 1, characterized in that: The first protrusion (301) and the second protrusion (204) are coaxial with the rotating shaft (8), and the rotating shaft (8) passes through the first protrusion (301) and the second protrusion (204); the first protrusion (301) is located in the first low-pressure chamber (6), and the second protrusion (204) is located in the third low-pressure chamber (9).

3. The electronic oil pump according to claim 1, characterized in that: A group of strip-shaped slots (302) are formed on the inner wall of the first protruding portion (301), and the strip-shaped slots (302) are connected to the first low-pressure chamber (6).

4. The electronic oil pump according to claim 1, characterized in that: An annular notch (205) is provided at the joint between the inner wall of the second protruding portion (204) and the through-opening of the pump housing (2).

5. The electronic oil pump according to claim 1, characterized in that: An oil injection channel (801) is provided inside the rotating shaft (8), and the oil injection channel (801) is open at one end facing the top cover (3). The rotating shaft (8) is provided with symmetrical oil outlet channels (802) at one end facing away from the top cover (3), and the oil outlet channels (802) are connected to the oil injection channel (801).

6. The electronic oil pump according to claim 5, characterized in that: The oil outlet channel (802) is located on a side of the first support block (4) facing away from the top cover (3), and the oil outlet channel (802) is connected to the right cavity (203), the first low-pressure chamber (6), the second low-pressure chamber (7) and the third low-pressure chamber (9).

Images