Backflow prevention device for engine oil pump

Abstract

The utility model discloses a backflow prevention device for an engine oil pump, and belongs to the technical field of engine oil pumps. The device mainly comprises a shell, oil inlet pipes are fixedly connected to the two sides of the shell, an anti-backflow cavity is formed in the inner side of the shell, one end of each oil inlet pipe communicates with the anti-backflow cavity, a connecting flange plate is fixedly installed at the front end of each oil inlet pipe, and an anti-backflow assembly is arranged in the anti-backflow cavity. The connecting plate is fixedly installed at the joint of the oil inlet pipe and the backflow prevention cavity, a telescopic air cylinder is fixedly installed at the front end of the connecting plate, a piston rod is fixedly connected to the front end of the telescopic air cylinder, a backflow prevention plug is fixedly connected to the front end of the piston rod, and the backflow prevention plug is slidably connected with the oil inlet pipe. Telescopic sliding rods are fixedly installed on the two sides of the piston rod, and a rubber layer is fixedly installed at the front end of the backflow prevention plug. According to the backflow prevention device for the engine oil pump, the oil return impact force is reduced, the load of the oil pump is reduced, and the service life of the oil pump is prolonged.

Description

Technical Field

[0001] This invention relates to the field of engine oil pump technology, and more specifically, to an anti-backflow device for engine oil pumps. Background Technology

[0002] Existing equipment equipped with hydraulic systems typically uses hydraulic systems mainly composed of a servo motor and an oil pump. This type of hydraulic system controls pressure by having the motor rotate in the opposite direction to draw back hydraulic oil, thus reducing pressure. During this process, the oil pump may be passively reversed, potentially exceeding its rated speed, which can easily damage the pump.

[0003] Therefore, it is necessary to provide an anti-backflow device for engine oil pumps to solve the above problems. Utility Model Content

[0004] Based on the aforementioned problems in the prior art, the purpose of this application is to provide an anti-backflow device for an engine oil pump, thereby reducing the backflow impact force, lowering the load on the oil pump, and extending the service life of the oil pump.

[0005] The technical solution adopted by this application to solve its technical problem is: an anti-backflow device for an engine oil pump, including a housing, oil inlet pipes fixedly connected to both sides of the housing, an anti-backflow cavity opened on the inner side of the housing, one end of each oil inlet pipe communicating with the anti-backflow cavity, a connecting flange fixedly installed at the front end of the oil inlet pipe, and an anti-backflow component provided inside the anti-backflow cavity.

[0006] Furthermore, the anti-backflow assembly includes a connecting plate, which is fixedly installed at the connection between the oil inlet pipe and the anti-backflow chamber. A telescopic cylinder is fixedly installed at the front end of the connecting plate, and a piston rod is fixedly connected to the front end of the telescopic cylinder. An anti-backflow plug is fixedly connected to the front end of the piston rod, and the anti-backflow plug is slidably connected to the oil inlet pipe.

[0007] Furthermore, telescopic slide rods are fixedly installed on both sides of the piston rod, and the rear end of the telescopic slide rods is fixedly connected to the inner wall of the anti-backflow cavity.

[0008] Furthermore, the surface of the connecting plate is provided with oil outlet holes.

[0009] Furthermore, a rubber layer is fixedly installed at the front end of the anti-backflow plug.

[0010] The beneficial effects of this utility model are: the anti-backflow plug moves forward and into the inside of the oil inlet pipe to cut off the oil inlet pipe. At this time, the oil inlet pipe under the housing is in a negative pressure state, so the fuel in the engine oil pump chamber and pipe will not flow back. Since the oil pump is constantly drawing fuel, the oil pump chamber and pipe will always be full of fuel. Thus, after the engine oil pump stops, the oil pump chamber and oil inlet pipe will not draw in air, thereby reducing the backflow impact force, reducing the load on the engine oil pump, and extending the service life of the engine oil pump. Attached Figure Description

[0011] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0012] Figure 1 This is an overall schematic diagram of an anti-backflow device for an engine oil pump according to this application;

[0013] Figure 2 for Figure 1 A schematic diagram of the mid-plane structure;

[0014] In the diagram: 1. Housing; 2. Oil inlet pipe; 3. Connecting flange; 4. Telescopic cylinder; 5. Connecting plate; 6. Piston rod; 7. Telescopic slide rod; 8. Anti-backflow plug; 9. Oil outlet; 10. Anti-backflow chamber; 11. Rubber layer. Detailed Implementation

[0015] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0016] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0017] In this invention, unless otherwise stated, the orientations used, such as "up" and "down," generally refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this invention.

[0018] like Figure 1-2As shown, this application provides an anti-backflow device for an engine oil pump, including a housing 1, with oil inlet pipes 2 fixedly connected to both sides of the housing 1, an anti-backflow cavity 10 opened on the inner side of the housing 1, one end of each oil inlet pipe 2 communicating with the anti-backflow cavity 10, a connecting flange 3 fixedly installed at the front end of the oil inlet pipe 2, and an anti-backflow component disposed inside the anti-backflow cavity 10.

[0019] The anti-backflow assembly includes a connecting plate 5, which is fixedly installed at the connection between the oil inlet pipe 2 and the anti-backflow chamber 10. A telescopic cylinder 4 is fixedly installed at the front end of the connecting plate 5. A piston rod 6 is fixedly connected to the front end of the telescopic cylinder 4. An anti-backflow plug 8 is fixedly connected to the front end of the piston rod 6. The anti-backflow plug 8 is slidably connected to the oil inlet pipe 2.

[0020] Telescopic slide rods 7 are fixedly installed on both sides of the piston rod 6, and the rear end of the telescopic slide rods 7 is fixedly connected to the inner wall of the anti-backflow cavity 10.

[0021] The surface of the connecting plate 5 is provided with oil outlet holes 9. Multiple oil outlet holes 9 are provided on the surface of the connecting plate 5 to slow down the flow rate of fuel during the process of the oil pump drawing fuel.

[0022] A rubber layer 11 is fixedly installed at the front end of the anti-backflow plug 8. When the anti-backflow plug 8 enters the oil inlet pipe 2, the rubber layer 11 increases the friction and improves the sealing performance.

[0023] Specifically, before the engine oil pump stops, the operator activates the telescopic cylinder 4. The telescopic cylinder 4 drives the piston rod 6 at the front end to extend forward. The piston rod 6 extends forward and drives the anti-backflow plug 8 at the front end to move forward. As the piston rod 6 moves forward, the telescopic sliding rods 7 on both sides will extend forward to assist the piston rod 6 in driving the anti-backflow plug 8 to move forward, thereby improving stability.

[0024] The anti-backflow plug 8 moves forward to the inside of the oil inlet pipe 2 to cut off the oil inlet pipe 2. At this time, the oil inlet pipe 2 of the housing 1 is under negative pressure, so the fuel in the engine oil pump chamber and pipe will not flow back. Since the oil pump is constantly drawing fuel, the oil pump chamber and pipe will always be full of fuel. After the engine oil pump stops, the oil pump chamber and oil inlet pipe 2 will not draw in air, eliminating the generation of air bubbles, effectively ensuring the safe operation of the engine, thereby reducing the backflow impact force, reducing the load on the engine oil pump, and extending the service life of the engine oil pump.

[0025] Obviously, the embodiments described above are only some embodiments of this invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort should fall within the scope of protection of this invention.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0029] The above description is merely a preferred embodiment of this invention. The scope of protection of this invention is not limited to the above embodiments. All technical solutions falling within the scope of this invention's concept are within the scope of protection of this invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this invention should also be considered within the scope of protection of this invention.

Claims

1. A backflow prevention device for an engine oil pump, characterized in that: Includes a housing (1), with oil inlet pipes (2) fixedly connected to both sides of the housing (1), and an anti-backflow cavity (10) opened on the inner side of the housing (1). One end of each oil inlet pipe (2) is connected to the anti-backflow cavity (10), and a connecting flange (3) is fixedly installed at the front end of the oil inlet pipe (2). An anti-backflow component is provided inside the anti-backflow cavity (10).

2. The anti-backflow device for an engine oil pump according to claim 1, characterized in that: The anti-backflow assembly includes a connecting plate (5), which is fixedly installed at the connection between the oil inlet pipe (2) and the anti-backflow chamber (10). A telescopic cylinder (4) is fixedly installed at the front end of the connecting plate (5), and a piston rod (6) is fixedly connected at the front end of the telescopic cylinder (4). An anti-backflow plug (8) is fixedly connected at the front end of the piston rod (6), and the anti-backflow plug (8) is slidably connected to the oil inlet pipe (2).

3. The anti-backflow device for an engine oil pump according to claim 2, characterized in that: Telescopic slide rods (7) are fixedly installed on both sides of the piston rod (6), and the rear end of the telescopic slide rods (7) is fixedly connected to the inner wall of the anti-backflow cavity (10).

4. The anti-backflow device for an engine oil pump according to claim 2, characterized in that: The surface of the connecting plate (5) is provided with an oil outlet hole (9).

5. The anti-backflow device for an engine oil pump according to claim 2, characterized in that: The front end of the anti-backflow plug (8) is fixedly fitted with a rubber layer (11).

Images