Pump head structure of high-flow oil pump

Abstract

The pump head structure of the large-flow oil pump comprises a pump head body, the pump head body comprises a main shell, a liquid inlet cover plate and a liquid outlet cover plate, and the liquid inlet cover plate and the liquid outlet cover plate are connected to the two sides of the main shell. The main shell comprises an oil pumping part, a backflow part located above the oil pumping part, a liquid inlet part and a liquid outlet part, the liquid inlet part and the liquid outlet part are located on the two sides of the oil pumping part respectively, an oil pumping cavity is constructed in the oil pumping part, a first opening and a second opening are formed in the two sides of the oil pumping cavity respectively, an oil pumping assembly is rotatably installed in the oil pumping cavity, and a via hole is formed in the rear wall of the oil pumping cavity; a backflow channel is arranged in the backflow part, and a one-way valve assembly is arranged in the main shell. According to the utility model, the oil pumping cavity and the joint are respectively arranged on the two parts, so that the limitation of the joint can be eliminated, the sectional area of the opening is increased, and the oil pumping quantity is increased; and meanwhile, through cooperation of the backflow channel and the one-way valve assembly, under the condition that the liquid outlet connector is blocked, liquid can flow back in the pump head body, and therefore the motor is effectively prevented from being burnt out.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pumping equipment, in particular to a pump head structure of a large flow oil pump. Background Art

[0002] An oil pump generally includes a pump body and a pump head connected to the front end of the body, the pump head having an oil pumping chamber, a liquid inlet joint and a liquid outlet joint connected to both sides of the oil pumping chamber, an oil pumping assembly being installed in the oil pumping chamber of the pump head, the oil pumping assembly being driven by a motor assembly in the pump body to rotate so as to form a negative pressure in the oil pumping chamber, thereby causing the engine oil or diesel to be sucked in from the liquid inlet joint and discharged from the liquid outlet joint; however, most of the existing pump heads are of an integrated structure, that is, the liquid inlet joint and the liquid outlet joint are integrally connected to the oil pumping chamber, which results in the openings on the two side walls of the oil pumping chamber being substantially the same as the calibers of the liquid inlet and outlet joints, thus greatly limiting the maximum oil pumping volume of the oil pump; at the same time, if the liquid outlet joint of the current oil pump is blocked, the motor will continue to burn out, and there is room for improvement. Utility Model Content

[0003] The utility model aims to overcome the defects in the above-mentioned prior art and provides a pump head structure of a large-flow oil pump, which can effectively increase the opening cross-sectional area of ​​the oil pump chamber and improve the oil pumping amount by constructing the pump oil chamber and the joint respectively on two components; at the same time, through the cooperation of the reflux channel and the one-way valve assembly, when the liquid outlet joint is blocked, the oil pump assembly continues to work and can push open the one-way valve assembly to allow the internal fluid to reflux through the loop channel, thereby effectively avoiding the burning of the motor.

[0004] To achieve the above object, the utility model provides a pump head structure of a large flow oil pump, including a pump head body, wherein the pump head body includes a main shell, and a liquid inlet cover plate and a liquid outlet cover plate respectively fixedly connected to two sides of the main shell;

[0005] The main housing includes an oil pumping part, a reflux part located above the oil pumping part, and a liquid inlet part and a liquid outlet part respectively located on both sides of the oil pumping part. An oil pumping cavity is arranged in the oil pumping part, and a first opening and a second opening communicating with the liquid inlet part and the liquid outlet part are respectively provided on both sides of the oil pumping cavity. An oil pumping assembly is rotatably installed in the oil pumping cavity, and a through hole is provided on the rear wall of the oil pumping cavity for the power supply motor drive shaft to extend therein so as to be linked with the oil pumping assembly.

[0006] The reflux part is provided with a reflux channel communicating with the liquid inlet part and the liquid outlet part of the second interface, and the main housing is provided with a one-way valve assembly for limiting the flow of fluid from the liquid inlet part side to the liquid outlet part side through the reflux channel;

[0007] The liquid inlet cover plate comprises a liquid inlet matching portion connected to the liquid inlet portion, and a liquid inlet joint portion connected to the liquid inlet matching portion;

[0008] The liquid outlet cover plate comprises a liquid outlet matching portion corresponding to the liquid outlet portion, and a liquid outlet joint portion connected to the liquid outlet matching portion.

[0009] It is further configured as follows: the pump oil chamber is a cylindrical structure, and the center axis of the pump oil chamber is eccentrically arranged with respect to the center line of the through hole.

[0010] It is further configured as follows: the oil pump assembly includes a rotating body and a plurality of scrapers arranged on the rotating body, the rotating body is provided with a plurality of accommodating slots, the scrapers are inserted into the accommodating slots of the rotating body in a one-to-one correspondence, and the scrapers can be partially thrown out and abut against the peripheral wall of the oil pump chamber during the rotation of the rotating body.

[0011] It is further configured that: an extension axis of each of the accommodating notches does not intersect with a center line of the through hole.

[0012] It is further configured that: the one-way valve assembly includes a valve stem and a spring, the stem portion of the valve stem is inserted into the reflux channel of the reflux portion and the head portion thereof is configured to be able to abut and seal against a port of the reflux portion on one side of the liquid inlet cover plate;

[0013] The liquid inlet cover plate is provided with a spring seat in a corresponding structure, and the spring is connected between the spring seat and the head of the valve stem so that the head of the valve stem always has a tendency to move toward the port.

[0014] It is further configured to include a front shell and a rear shell that are arranged on the outside of the pump head body to limit and clamp the pump head body.

[0015] It is further configured that: the channel in the liquid inlet joint part and the channel in the liquid outlet joint part are arranged opposite to the reflux channel in the reflux part.

[0016] It is further configured that: the oil pump portion has a cavity with an open front end;

[0017] The main housing also includes a front cover plate, which is fixedly covered on the receiving cavity to cooperate to form a pump oil cavity.

[0018] Compared with the prior art, the utility model has a simple and reasonable structure. By constructing the oil pump chamber and the joint on two components respectively, the opening cross-sectional area on the oil pump chamber can be effectively increased, thereby increasing the oil pumping amount. At the same time, through the cooperation of the reflux channel and the one-way valve assembly, when the liquid outlet joint is blocked, the oil pump assembly continues to work to push open the one-way valve assembly so that the internal fluid can reflux through the loop channel, thereby effectively avoiding burning of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is a three-dimensional structural schematic diagram of a large flow oil pump of the utility model;

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the pump head;

[0021] Figure 3 It is a schematic diagram of the separation structure of the pump head;

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the main shell;

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the oil pump assembly.

[0024] The following reference numerals are marked on the drawings in conjunction with the drawings:

[0025] 10. Pump head; 11. Pump head body; 110. Main shell; 111. Pump oil part; 1111. Pump oil chamber; 1112. First opening; 1113. Second opening; 1114. Through hole; 112. Reflux part; 1121. Reflux channel; 113. Liquid inlet part; 114. Liquid outlet part; 115. Front cover plate; 120. Liquid inlet cover plate; 121. Liquid inlet matching part; 122. Liquid inlet joint part; 123. Spring seat; 130. Liquid outlet cover plate; 131. Liquid outlet matching part; 132. Liquid outlet joint part; 140. Pump oil assembly; 141. Rotating body; 1411. Accommodating notch; 142. Scraper; 150. One-way valve assembly; 151. Valve stem; 152. Spring; 12. Front shell; 13. Rear shell; 20. Pump body. DETAILED DESCRIPTION

[0026] A specific implementation of the present utility model is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present utility model is not limited by the specific implementation mode.

[0027] The utility model discloses a large flow oil pump such as Figure 1 As shown, it includes a pump body 20 and a pump head 10 installed at the front end of the pump body 20, the pump head 10 has an oil pump chamber 1111, and a liquid inlet joint part 122 and a liquid outlet joint part 132 connected to the oil pump chamber 1111, and an oil pump assembly 140 is rotatably installed in the oil pump chamber 1111 of the pump head 10; a motor assembly is arranged in the pump body 20, and the driving shaft of the motor assembly extends into the oil pump chamber 1111 to be linked with the oil pump assembly 140, so that the oil pump assembly 140 rotates under the drive of the motor assembly to enable liquid to flow in from the liquid inlet joint and flow out from the liquid outlet joint.

[0028] In this embodiment, if Figure 2 , Figure 3 and Figure 4As shown, the pump head 10 includes a pump head body 11, which includes a main shell 110, and a liquid inlet cover plate 120 and a liquid outlet cover plate 130 respectively fixedly connected to both sides of the main shell 110; wherein the main shell 110 includes an oil pumping portion 111, a reflux portion 112 located above the oil pumping portion 111, and a liquid inlet portion 113 and a liquid outlet portion 114 respectively located on both sides of the oil pumping portion 111, and an oil pumping cavity 1111 is structured in the oil pumping portion 111, and a first opening 1112 and a second opening are respectively opened on both sides of the oil pumping cavity 1111 for respectively connecting the liquid inlet portion 113 and the liquid outlet portion 114. 1113, a through hole 1114 is provided on the rear wall of the pump oil chamber 1111 for the motor drive shaft of the motor assembly of the pump body 20 to extend into and be linked with the pump oil assembly 140; a reflux channel 1121 is provided in the reflux portion 112 to connect the liquid inlet portion 113 and the liquid outlet portion 114, and a one-way valve assembly 150 is provided in the main housing 110 for limiting the flow of fluid from the liquid inlet portion 113 to the liquid outlet portion 114 through the reflux channel 1121; the liquid inlet cover plate 120 is provided on the liquid inlet portion 113 of the main housing 110 by screw cover, and includes a liquid inlet matching portion 120 connected to the liquid inlet portion 113 1, and a liquid inlet joint portion 122 connected and arranged on the liquid inlet matching portion 121; the liquid outlet cover plate 130 is fixed and covered on the liquid outlet portion 114 of the main housing 110 by screws, including a liquid outlet matching portion 131 connected to the liquid outlet portion 114, and a liquid outlet joint portion 132 connected and arranged on the liquid outlet matching portion 131; in this way, when the pump head 10 works normally, the reflux channel 1121 is in a closed state, and the fluid flow path in the pump head 10 is: liquid inlet joint portion 122→liquid inlet matching portion 121→liquid inlet portion 113→first opening 1112→pump oil chamber 1111→second opening 1 113→liquid outlet part 114→liquid outlet matching part 131→liquid outlet joint part 132; when the liquid outlet joint part 132 is in a blocked state, the reflux channel 1121 is pushed open under the hydraulic pressure in the pump head 10. At this time, the fluid flow path in the pump head 10 is: liquid inlet joint part 122→liquid inlet matching part 121→liquid inlet part 113→first opening 1112→pump oil chamber 1111→second opening 1113→reflux channel 1121→first opening 1112. In this way, reflux can be achieved through the reflux channel 1121 to form a self-circulation in the pump head 10, thereby avoiding the situation where the motor component is burned out.

[0029] In the above scheme, in order to facilitate the installation of the oil pump assembly 140, preferably, the oil pump part 111 has a cavity with an open front end, and the main shell 110 also includes a front cover plate 115, which is fixed to the cavity of the oil pump part 111 by screws to form an oil pump cavity 1111.

[0030] In this embodiment, the pump head 10 also includes a front shell 12 and a rear shell 13 which are arranged opposite to each other on the outside of the pump head body 11. The front shell 12 and the rear shell 13 are fixedly connected by screws to limit and clamp the pump head body 11, thereby further ensuring the matching stability between the main shell 110 of the pump head body 11, the liquid inlet cover plate 120 and the liquid outlet cover plate 130.

[0031] In this embodiment, the pump oil chamber 1111 is a cylindrical structure, and the pump oil assembly 140 is eccentrically arranged in the pump oil chamber 1111, that is, the central axis of the pump oil chamber 1111 is not colinear with the center of the through hole 1114 and is eccentrically arranged; Figure 2 As shown, the liquid inlet connector is at the upper right side of the pump head 10, the liquid outlet connector is at the upper left side of the pump head 10, and the oil pump assembly 140 rotates clockwise. At this time, the through hole 1114 is located above the center of the oil pump chamber 1111, which effectively increases the effective oil flow space in the oil pump chamber 1111, thereby effectively increasing the maximum oil pumping volume of the oil pump.

[0032] In an embodiment, Figure 5 As shown, the oil pump assembly 140 includes a rotating body 141 and a plurality of scrapers 142 movably mounted on the rotating body 141, the motor drive shaft is connected to the center of the rotating body 141, and a plurality of inwardly extending accommodating slots 1411 are arranged on the outer edge surface of the rotating body 141. The scrapers 142 are inserted into the accommodating slots 1411 of the rotating body 141 in a one-to-one correspondence, and the scrapers 142 can be partially thrown out and abut against the peripheral wall of the pump oil chamber 1111 during the rotation of the rotating body 141, thereby effectively ensuring the pumping effect; preferably, the extension axis of each accommodating slot 1411 on the rotating body 141 does not intersect with the center line of the through hole 1114, that is, the extension axis of the accommodating slot 1411 does not pass through the connection center of the rotating body 141.

[0033] In this embodiment, if Figure 3 As shown, the one-way valve assembly 150 includes a valve stem 151 and a spring 152. The stem portion of the valve stem 151 is inserted into the reflux channel 1121 of the reflux portion 112 and the head portion thereof is constructed to be able to abut and seal against the port of the reflux portion 112 on the side of the liquid inlet cover plate 120. The liquid inlet cover plate 120 is correspondingly constructed with a spring seat 123. The spring 152 is abutted and connected between the spring seat 123 and the head portion of the valve stem 151 so that the head portion of the valve stem 151 always has a tendency to move toward the port. This ensures that when the oil pump is working normally, the reflux channel 1121 is in a closed state under the action of the one-way valve assembly 150, and when the liquid outlet joint of the oil pump is blocked, the one-way valve assembly 150 can be pushed open under the action of the internal hydraulic pressure to make the reflux channel 1121 unobstructed to achieve reflux, thereby ensuring the stability of the motor assembly and reducing the possibility of burning out.

[0034] Compared with the prior art, the utility model has a simple and reasonable structure. By constructing the oil pump chamber and the joint on two components respectively, the opening cross-sectional area on the oil pump chamber can be effectively increased, thereby increasing the oil pumping amount. At the same time, through the cooperation of the reflux channel and the one-way valve assembly, when the liquid outlet joint is blocked, the oil pump assembly continues to work to push open the one-way valve assembly so that the internal fluid can reflux through the loop channel, thereby effectively avoiding burning of the motor.

[0035] The above disclosure is only an embodiment of the present invention, but the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A pump head structure of a large flow oil pump, characterized in that: The pump head body comprises a main housing, and a liquid inlet cover plate and a liquid outlet cover plate respectively fixedly connected to two sides of the main housing; The main housing includes an oil pumping part, a reflux part located above the oil pumping part, and a liquid inlet part and a liquid outlet part respectively located on both sides of the oil pumping part; an oil pumping chamber is arranged in the oil pumping part, and a first opening and a second opening communicating with the liquid inlet part and the liquid outlet part are respectively provided on both sides of the oil pumping chamber; an oil pumping assembly is rotatably installed in the oil pumping chamber, and a through hole is provided on the rear wall of the oil pumping chamber for the power supply motor drive shaft to extend therein so as to be linked with the oil pumping assembly; The reflux part is provided with a reflux channel communicating with the liquid inlet part and the liquid outlet part of the second interface, and the main housing is provided with a one-way valve assembly for limiting the flow of fluid from the liquid inlet part side to the liquid outlet part side through the reflux channel; The liquid inlet cover plate comprises a liquid inlet matching portion connected to the liquid inlet portion, and a liquid inlet joint portion connected to the liquid inlet matching portion; The liquid outlet cover plate comprises a liquid outlet matching portion corresponding to the liquid outlet portion, and a liquid outlet joint portion connected to the liquid outlet matching portion.

2. The pump head structure of a large flow oil pump according to claim 1, characterized in that: The pump oil chamber is a cylindrical structure, and the center axis of the pump oil chamber is eccentrically arranged with respect to the center line of the through hole.

3. A pump head structure of a large flow oil pump according to claim 1 or 2, characterized in that: The oil pump assembly includes a rotating body and a plurality of scrapers arranged on the rotating body. The rotating body is provided with a plurality of accommodating slots. The scrapers are inserted into the accommodating slots of the rotating body in a one-to-one correspondence and the scrapers can be partially thrown out and abut against the peripheral wall of the oil pump chamber during the rotation of the rotating body.

4. The pump head structure of a large flow oil pump according to claim 3, characterized in that: An extension axis of each of the accommodating notches does not intersect with a center line of the through hole.

5. The pump head structure of a large flow oil pump according to claim 1, characterized in that: The one-way valve assembly includes a valve stem and a spring, wherein the stem portion of the valve stem is inserted into the reflux channel of the reflux portion and the head portion of the valve stem is configured to abut against and seal against a port of the reflux portion on a side of the liquid inlet cover plate; The liquid inlet cover plate is provided with a spring seat in a corresponding structure, and the spring is connected between the spring seat and the head of the valve stem so that the head of the valve stem always has a tendency to move toward the port.

6. The pump head structure of a large flow oil pump according to claim 1, characterized in that: It also includes a front shell and a rear shell which are arranged on the outside of the pump head body to limit and clamp the pump head body.

7. The pump head structure of a large flow oil pump according to claim 1, characterized in that: The channel in the liquid inlet joint part and the channel in the liquid outlet joint part are arranged opposite to the reflux channel in the reflux part.

8. The pump head structure of a large flow oil pump according to claim 1, characterized in that: The oil pump part has a cavity with an open front end; The main housing also includes a front cover plate, which is fixedly covered on the receiving cavity to cooperate to form a pump oil cavity.

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