A gasoline pump cylinder

Abstract

The application discloses a gasoline pump cylinder body, belongs to the technical field of pump body structure, and is used for providing a gasoline pump cylinder body which can keep full state when stopping. The gasoline pump cylinder body comprises a pair of shells, each shell has a semicylinder, one end of the semicylinder is connected with an oil inlet end through a bottom ring, the other end is connected with an oil outlet end through a top ring, the semicylinder further has a lower limiting ring and an upper limiting ring, the lower limiting ring is located between the upper limiting ring and the bottom ring, and the inner wall of the semicylinder is provided with two limiting grooves, one of which is located between the bottom ring and the lower limiting ring, and the other is located between the top ring and the upper limiting ring. According to the application, the limiting groove structure is arranged on the inner wall of the shell, so that the stop lever can limit the rubber valve plate in cooperation with the bottom ring and the upper limiting ring. After the gasoline pump stops working, the rubber valve plate is flat and can completely isolate the oil inlet end and the oil outlet end of the cylinder body, so that the oil liquid is kept in the cylinder body, and when restarting, the problems of delay and unstable oil supply caused by the fact that the oil liquid in the cylinder body is not full can be avoided.

Description

Technical Field

[0001] This application relates to the field of pump body structure technology, and in particular to a gasoline pump cylinder body. Background Technology

[0002] The existing fuel pump cannot completely isolate the input and output ends through internal structure. After the fuel pump stops working, the fuel will flow back into the fuel cylinder under its own gravity. Therefore, when the fuel pump is restarted, the fuel pump cylinder needs to be filled with fuel before it can supply fuel. As a result, there is a delay in fuel supply. Furthermore, the fuel supply is not stable before the cylinder is filled with fuel, which can easily lead to fuel waste or unstable engine operation. Summary of the Invention

[0003] The purpose of this application is to provide a gasoline pump cylinder that can remain fully charged when the engine is stopped.

[0004] To achieve the above objectives, this application provides a gasoline pump cylinder body: comprising a pair of housings, a sealing element disposed between the two housings, the two housings being fixed by a connector, each housing having a semi-cylinder, one end of the semi-cylinder being connected to an oil inlet end via a bottom ring, and the other end being connected to an oil outlet end via a top ring, the semi-cylinder also having a lower limiting ring and an upper limiting ring, the lower limiting ring being located between the upper limiting ring and the bottom ring, the inner wall of the semi-cylinder having two limiting grooves, one located between the bottom ring and the lower limiting ring, and the other located between the top ring and the upper limiting ring, used to cooperate with other sealing structures to form an inner cavity in the cylinder that is sometimes connected and sometimes isolated.

[0005] As a preferred embodiment, the two aligned semi-cylinders are fitted with a stop bar, the length of which is perpendicular to the plane of the two opposing semi-cylinders, to limit the position of the sealing structure inside the cylinder.

[0006] As a preferred embodiment, a rubber valve plate is suitable for being installed below each of the aforementioned stop bars. The distance between the upper stop bar and the upper surface of the upper limit ring is equal to the distance between the lower stop bar and the upper surface of the bottom ring, and is also equal to the thickness of the rubber valve plate. In this way, the stop bar will not deform the rubber valve plate, and the position of the rubber valve plate in the cylinder body will be stable.

[0007] As a preferred embodiment, the upper limit ring has a guide hole in the center, the upper surface of the lower limit ring has a coaxial spring liner, and the oil inlet end is connected to the oil outlet end through the spring liner and the guide hole to form an oil flow channel.

[0008] As a preferred embodiment, the outer side of the semi-cylinder has a connecting plate with a through hole. The connecting member includes a bolt and a nut. The bolt passes through the through holes of the two housings and engages with the nut, thereby fixing the two housings together to form a complete gasoline pump cylinder.

[0009] As a preferred embodiment, the seal includes a pair of parallel sealing strips, with a sealing ring connected to the aligned ends of the two sealing strips. The sealing strips are located between the two semi-cylinders, and the sealing ring is located at the aligned ends of the two semi-cylinders to form a sealing surface, thereby preventing oil leakage from the cylinder.

[0010] As a preferred embodiment, the two opposing planes of the two semi-cylinders are provided with a pair of parallel straight sealing grooves, and the sealing strip is adapted to be embedded in the straight sealing grooves to prevent oil from overflowing from the mating gap between the two housings.

[0011] As a preferred embodiment, each of the semi-cylinders has an arc-shaped sealing groove at both ends, and the sealing ring is adapted to be embedded in the arc-shaped sealing groove to prevent oil from overflowing from the oil inlet and oil outlet ends.

[0012] Compared with the prior art, the beneficial effects of this application are as follows:

[0013] (1) By opening a limiting groove structure on the inner wall of the housing, the lever can cooperate with the bottom ring and the upper limit ring to limit the rubber valve plate. After the gasoline pump stops working, the rubber valve plate flattens out and completely isolates the oil inlet and oil outlet of the cylinder, thus leaving the oil in the cylinder. When restarting, there will be no problem of delay and unstable oil supply due to the oil not being full in the cylinder.

[0014] (2) The design structure is reasonable, easy to assemble and has good sealing performance. In addition, the cylinder structure is simple and the maintenance and use costs are relatively low. Attached Figure Description

[0015] Figure 1 This is a first three-dimensional schematic diagram of the overall structure of the gasoline pump cylinder.

[0016] Figure 2 This is a second three-dimensional schematic diagram of the overall structure of the gasoline pump cylinder.

[0017] Figure 3 This is a three-dimensional sectional view of the overall structure of the gasoline pump cylinder.

[0018] Figure 4 This is a three-dimensional cross-sectional view of the connection between the two housings of the gasoline pump cylinder.

[0019] Figure 5 This is a three-dimensional structural diagram of the seal and housing of the gasoline pump cylinder.

[0020] Figure 6 This is a first three-dimensional structural diagram of the housing of the gasoline pump cylinder.

[0021] Figure 7 This is a schematic diagram of the second three-dimensional structure of the housing of the gasoline pump cylinder.

[0022] Figure 8 This is a three-dimensional structural diagram of the seal of the gasoline pump cylinder.

[0023] Figure 9 This is a three-dimensional structural diagram of the connecting parts of the gasoline pump cylinder.

[0024] Figure 10 This is a three-dimensional structural diagram of the stop lever of the gasoline pump cylinder.

[0025] In the diagram: 1. Seal; 101. Sealing strip; 102. Sealing ring; 2. Housing; 201. Semi-cylinder; 202. Connecting plate; 203. Bottom ring; 204. Top ring; 205. Oil inlet; 206. Oil outlet; 207. Lower limit ring; 208. Spring liner; 209. Upper limit ring; 210. Guide hole; 211. Straight sealing groove; 212. Arc-shaped sealing groove; 213. Through hole; 214. Limiting groove; 3. Connecting parts; 301. Bolt; 302. Nut; 4. Stop bar. Detailed Implementation

[0026] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0027] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0028] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0029] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0030] like Figure 1-10 The gasoline pump cylinder shown includes a pair of identical housings 2, which cooperate to form the main body of the gasoline pump cylinder. A rubber seal 1 is provided between the two housings 2. Each housing 2 has a semi-cylinder 201. The seal 1 includes a pair of parallel sealing strips 101. The two ends of the two sealing strips 101 are aligned. The aligned ends of the two sealing strips 101 are connected to a sealing ring 102. The two sealing strips 101 and the two sealing rings 102 are an integral structure. The sealing strips 101 are located between the two semi-cylinders 201 to prevent oil from overflowing from the mating gap between the two semi-cylinders 201. The sealing rings 102 are located at the aligned ends of the two semi-cylinders 201 to prevent oil from overflowing from the ends of the housings 2.

[0031] Two shells 2 are fixed by connectors 3. A semi-cylinder 201 has two ends, an arc-shaped outer surface, and a planar mating surface. The arc-shaped outer surface of the semi-cylinder 201 has a connecting plate 202, which is flush with the planar mating surface of the semi-cylinder 201. There are two connecting plates 202 on the outer surface of the semi-cylinder 201, symmetrical about the semi-cylinder 201. Each connecting plate 202 has two through holes 213, located near its upper and lower ends respectively. The connector 3 includes a bolt 301 and a nut 302 that mate with each other. The bolt 301 passes through the two shells. After the through hole 213 of body 2 is screwed into nut 302, the two ends of the two housings 2 are aligned and fixed together. A pair of parallel straight sealing grooves 211 are opened on the opposite planes of the two semi-cylinders 201. The sealing strip 101 is embedded in the straight sealing groove 211. After the two semi-cylinders 201 are joined together, the cavity formed between them is located between the two sealing strips 101. Each end of the semi-cylinder 201 is opened with an arc-shaped sealing groove 212. The sealing ring 102 is embedded in the arc-shaped sealing groove 212 to form a sealing surface with the end face of the pipe connected to the outside of the gasoline pump cylinder.

[0032] One end of the semi-cylinder 201 is connected to an oil inlet end 205 via a bottom ring 203. The two oil inlets 205 together form a hollow cylinder that can be embedded into the port of the oil suction pipe. The other end of the semi-cylinder 201 is connected to an oil outlet end 206 via a top ring 204. The two oil outlet ends 206 together form a hollow cylinder that can be embedded into the port of the oil discharge pipe. The semi-cylinder 201 also has a lower limit ring 207 and an upper limit ring 209. The lower limit ring 207 is located between the upper limit ring 209 and the bottom ring 203, therefore the upper limit ring... Ring 209 is also located between the lower limit ring 207 and the top ring 204. The two upper limit rings 209 are joined together to form a complete ring, with a circular guide hole 210 in the center for the piston rod to pass through. The upper surface of the lower limit ring 207 has a coaxial spring liner 208. The two lower limit rings 207 are joined together to form a complete ring. The two spring liners 208 are aligned to form a hollow cylinder. The oil inlet end 205 is connected to the oil outlet end 206 through the spring liner 208 and the guide hole 210 to form a continuous oil flow channel.

[0033] Each semi-cylinder 201 has two limiting grooves 214 on its inner wall. One groove is located between the bottom ring 203 and the lower limiting ring 207, and the other is located between the top ring 204 and the upper limiting ring 209. The two semi-cylinders 201 are aligned and the limiting grooves 214 are fitted with a stop rod 4. The length direction of the stop rod 4 is perpendicular to the plane of the two semi-cylinders 201. The two stop rods 4 are parallel to each other. A rubber valve plate is suitable for being installed below each stop rod 4. The thickness of the rubber valve plate is generally about two millimeters. The distance between the upper stop rod 4 and the upper surface of the upper limiting ring 209 is equal to the distance between the lower stop rod 4 and the upper surface of the bottom ring 203, and is also equal to the thickness of the rubber valve plate. In this way, the upper rubber valve plate can be parallel to the upper limiting ring 209 and fit against the upper surface of the upper limiting ring 209 when it is flat. The lower rubber valve plate can be parallel to the bottom ring 203 and fit against the upper surface of the bottom ring 203 when it is flat.

[0034] Working principle: During assembly, the piston is first configured. The piston includes a tray with several through holes. A coaxial piston rod is fixedly connected to one end of the tray. A rubber valve plate is also provided on the end face of the tray connecting to the piston rod. The middle part of the rubber valve plate is fixed to the end face of the tray by the piston rod, but the edge of the rubber valve plate can bend upwards, but it is difficult to bend downwards. After the piston is assembled, the tray along with the connected rubber valve plate is placed between the upper limit ring 209 and the lower limit ring 207. The piston rod passes through the guide hole 210, but the diameter of the piston rod is smaller than that of the guide hole 210, so the oil can still flow upwards through the guide hole 210. Then, the lower end of the helical spring is fastened to the outside of the spring liner 208, and the upper end is pressed against the bottom of the tray. Then, the two rubber valve plates are taken out and placed on the upper limit ring 209 and the bottom ring 203 respectively. Then, the stop bar 4 is inserted to limit the position. The seal 1 can first be engaged with one housing 2. Then, the unengaged part of the upper sealing ring 102 is flipped upward and the unengaged part of the lower sealing ring 102 is flipped downward. Then, the other housing 2 is fastened, so that the upper and lower sealing rings 102 are restored and engaged with the two housings 2 at the same time. Finally, the bolts 301 and nuts 302 are used to constrain and fix the two housings 2.

[0035] In this way, the gasoline pump cylinder can be connected to the fuel supply management system. The inlet end 205 is connected to the suction pipe, which is usually made of rigid plastic. The upper end presses against the sealing ring 102 below to form a sealing surface, and the lower end is submerged below the oil and located at the bottom of the cylinder. The outlet end 206 is connected to the outlet pipe, which must be rigid and can be made of rigid plastic or alloy. The lower end of the vertical outlet pipe presses against the sealing ring 102 below to form a sealing surface, and the upper end is connected to a horizontal pipe. The piston rod passes through the interior of the vertical outlet pipe and extends out from the horizontal pipe. It is driven by the downward pressure drive mechanism outside the horizontal pipe. The piston rod has a sealing structure at the joint with the horizontal pipe.

[0036] When the downward drive mechanism applies downward pressure to the piston rod, the tray descends against the spring force, and the edge of the rubber valve plate connected to the tray rises. Air or oil located below the tray flows through the tray channel above the tray. After the downward drive mechanism releases its force, the tray rises under the action of the spring force, and the rubber valve plate connected to the tray flattens, pressurizing the air or oil above the tray. This forces the rubber valve plate above the upper limit ring 209 to rise, and the air or oil reaches the upper limit ring 209 through the guide hole 210, finally being discharged from the oil discharge end 206. At the same time, a pressure is generated below the tray. Negative pressure, the atmospheric pressure inside the fuel tank, forces the fuel into the inlet 205 and forces the edge of the rubber valve above the bottom ring 203 to lift up. The fuel is then replenished to the bottom of the tray through the spring liner 208. When the tray descends again, the rubber valve above the bottom ring 203 flattens out and completely blocks the inlet 205. The rubber valve above the upper limit ring 209 also flattens out and completely blocks the guide hole 210. Only the edge of the rubber valve connected to the tray lifts up, allowing the fuel below the tray to flow above the tray. Thus, with the reciprocating motion of the piston, the fuel pump cylinder can continuously pump fuel upward.

[0037] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A gasoline pump cylinder body, characterized in that: The device includes a pair of housings (2), with a seal (1) between the two housings (2). The two housings (2) are fixed by a connector (3). Each housing (2) has a semi-cylinder (201). One end of the semi-cylinder (201) is connected to an oil inlet (205) via a bottom ring (203), and the other end is connected to an oil outlet (206) via a top ring (204). The semi-cylinder (201) also has a lower limit ring (207) and an upper limit ring (209). The lower limit ring (207) is located between the upper limit ring (209) and the bottom ring (203). The inner wall of the semi-cylinder (201) has two limiting grooves (214), one located between the bottom ring (203) and the lower limit ring (207), and the other located between the top ring (204) and the upper limit ring (209).

2. The gasoline pump cylinder block as described in claim 1, characterized in that: The two semi-cylinders (201) are aligned with the limiting grooves (214) and are fitted with a stop bar (4). The length direction of the stop bar (4) is perpendicular to the plane opposite to the two semi-cylinders (201).

3. The gasoline pump cylinder block as described in claim 2, characterized in that: A rubber valve is adapted to be installed below each of the aforementioned stop bars (4), and the distance between the upper stop bar (4) and the upper surface of the upper limit ring (209) is equal to the distance between the lower stop bar (4) and the upper surface of the bottom ring (203), and is also equal to the thickness of the rubber valve.

4. The gasoline pump cylinder block as described in claim 3, characterized in that: The upper limit ring (209) has a guide hole (210) in the center, and the upper surface of the lower limit ring (207) has a coaxial spring liner (208). The oil inlet end (205) is connected to the oil outlet end (206) through the spring liner (208) and the guide hole (210).

5. The gasoline pump cylinder block as described in claim 4, characterized in that: The outer side of the semi-cylinder (201) has a connecting plate (202), the connecting plate (202) has a through hole (213), the connecting member (3) includes a bolt (301) and a nut (302), the bolt (301) passes through the two through holes (213) of the housing (2) and then screws into the nut (302).

6. The gasoline pump cylinder block as described in any one of claims 1 to 5, characterized in that: The sealing element (1) includes a pair of parallel sealing strips (101), and the aligned ends of the two sealing strips (101) are connected to a sealing ring (102). The sealing strips (101) are located between the two semi-cylinders (201), and the sealing ring (102) is located at the aligned ends of the two semi-cylinders (201).

7. The gasoline pump cylinder block as described in claim 6, characterized in that: The two semi-cylinders (201) have a pair of parallel straight sealing grooves (211) on their opposite planes, and the sealing strip (101) is adapted to be embedded in the straight sealing grooves (211).

8. The gasoline pump cylinder block as described in claim 7, characterized in that: Each of the semi-cylinders (201) has an arc-shaped sealing groove (212) at both ends, and the sealing ring (102) is adapted to be embedded in the arc-shaped sealing groove (212).

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