Electronic oil pump

Abstract

The utility model 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. The first low-pressure cavity is formed between the second supporting block and the top cover in the pump shell, the second low-pressure cavity is formed between the second supporting block and the partition layer, the third low-pressure cavity is formed between the partition layer and the first supporting block, and the rotating shaft passes through the first low-pressure cavity, the second low-pressure cavity and the third low-pressure cavity, so that when the pump body works, the rotating shaft rotates to drive the pump body to rotate. 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 utility model 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 relatively troublesome and costly. In view of this, we propose an electronic oil pump. Utility Model Content

[0004] The purpose of the utility model 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] In order to solve the above technical problems, the present utility model provides the following technical solutions: an electronic oil pump, comprising a pump body, wherein the pump body comprises 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 and the pump casing are coaxial, a partition layer is arranged inside the pump casing, the interior 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 chamber is formed between the second support block and the top cover, a second low-pressure chamber is formed between the second support block and the partition layer, and a third low-pressure chamber 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 oil in the first, second and third low-pressure chambers is then passed through the gap between the first support block and the rotating shaft to enter the second low-pressure chamber, and finally enters the gap between the top cover and the rotating shaft. Therefore, the lubricating oil in the first, second and third low-pressure chambers 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, which can ensure that the rotating shaft can rotate smoothly without a bearing, and the rotating shaft installation is more convenient and reduces the installation cost. The utility model provides a first protrusion in the area of ​​the top cover located in the first low-pressure chamber, and a second protrusion in the area of ​​the partition layer located in the third low-pressure chamber, and the rotating shaft passes through the first protrusion and the second protrusion, thereby increasing the force bearing surface of the top cover and the partition layer supporting the rotating shaft, and further ensuring the stability of the rotating shaft installation, and 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 junction of the second protrusion and the partition layer through-hole. Therefore, the lubricating oil in the first low-pressure chamber will flow into the strip grooves. When the rotating shaft rotates, the lubricating oil in the strip grooves can continuously lubricate the area of ​​the rotating shaft passing through the first protrusion. The annular groove can store a certain amount of lubricating oil, and the lubricating oil stored in the annular groove can continuously penetrate into the area of ​​the rotating shaft passing 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 filling channel is opened inside the rotating shaft, and the oil filling channel is open at one end facing the top cover. Symmetrical oil outlet channels are opened at the upper and lower ends of the rotating shaft facing away from the top cover, and the oil outlet channels are connected to the oil filling 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 beneficial effects of the present invention are:

[0014] 1. A first low-pressure chamber is formed between the second support block and the top cover in the pump housing of the utility model, a second low-pressure chamber is formed between the second support block and the partition layer, and 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 connected to 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, generating 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 passes through the gap between the first support block and the rotating shaft into the third low-pressure chamber, 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, that is, the self-lubricating effect of the shaft installation is achieved, which can ensure that the shaft can rotate smoothly without a bearing, and the shaft installation is more convenient and reduces 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 utility model has the advantage of self-lubrication.

[0015] 2. The utility model provides a first protrusion in the area of ​​the top cover located in the first low-pressure chamber, and a second protrusion in the area of ​​the partition layer located in the third low-pressure chamber, and the rotating shaft passes through the first protrusion and the second protrusion, thereby increasing the force bearing surface of the top cover and the partition layer supporting the rotating shaft, and further ensuring the stability of the rotating shaft installation, and 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 junction of the second protrusion and the partition layer through-hole. Therefore, the lubricating oil in the first low-pressure chamber will flow into the strip grooves. When the rotating shaft rotates, the lubricating oil in the strip grooves can continuously lubricate the area of ​​the rotating shaft passing through the first protrusion. The annular groove can store a certain amount of lubricating oil, and the lubricating oil stored in the annular groove can continuously penetrate into the area of ​​the rotating shaft passing 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

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

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the pump casing and top cover of the utility model;

[0019] Figure 4 This is a schematic diagram of the top cover structure of the present utility model.

[0020] Description of the numbers in the figure:

[0021] 1. Pump body; 2. Pump casing; 201. Separation 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 utility model relates to an electronic oil pump, including a pump body 1, the pump body 1 includes a pump shell 2, a top cover 3 and a rotating shaft 8, the top cover 3 is arranged on the opening side of the pump shell 2, the rotating shaft 8 is rotatably arranged inside the pump shell 2, the rotating shaft 8 is coaxial with the pump shell 2, a partition layer 201 is arranged inside the pump shell 2, and the interior of the pump shell 2 is divided into a left cavity 202 and a right cavity 203 by the partition layer 201, the right cavity 203 is arranged with a first support block 4, the left cavity 202 is arranged with a second support block 5, and the rotating shaft 8 passes through the top cover 3, the second support block 5 and the left cavity 202 in sequence. The first low-pressure chamber 6 is formed between the block 5, the partition layer 201 and the first support block 4, the second support block 5 and the top cover 3, the second low-pressure chamber 7 is formed between the second support block 5 and the partition layer 201, and the third low-pressure chamber 9 is formed between the partition layer 201 and the first support block 4; an oil filling channel 801 is opened inside the rotating shaft 8, and the oil filling 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 filling channel 801; the oil outlet channel 802 is located at The first support block 4 is on the side 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; 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, 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 into the third low-pressure chamber 9, and then passes through the gap between the partition layer 201 and the shaft 8 into the second low-pressure chamber 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 utility model, 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-shaped notches 302 are provided on the inner wall of the first protrusion 301, and the strip-shaped notches 302 are connected to the first low-pressure chamber 6; an annular notch 205 is provided at the joint between the inner wall of the second protrusion 204 and the through-port of the pump casing 2; the first protrusion 301 and the second protrusion 204 can increase the top The cover 3 and the partition layer 201 support the load-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 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.

[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 chamber 9, and then passes through the gap between the partition layer 201 and the shaft 8 to enter the second low-pressure chamber 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, thereby achieving a self-lubricating effect for the installation of the shaft 8, ensuring that the shaft 8 can rotate smoothly without a bearing, making the installation of the shaft 8 more convenient and reducing 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 disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. An electronic oil pump, characterized in that: The invention comprises a pump body (1), wherein 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 on 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 second cavity (202). A support block (4), a second support block (5) is arranged inside the left cavity (202), the rotating shaft (8) sequentially passes through the top cover (3), the second support block (5), the partition layer (201) and the first support block (4), 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 provided on the inner wall of the first protruding portion (301), and the strip-shaped slots (302) are communicated with 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 protrusion (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). Symmetrical oil outlet channels (802) are provided 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 communicated with 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 the side of the first support block (4) facing away from the top cover (3), and the oil outlet channel (802) is communicated with the right cavity (203), the first low-pressure chamber (6), the second low-pressure chamber (7) and the third low-pressure chamber (9).

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