Quick connecting structure for pump core of fuel pump

Abstract

The utility model relates to the technical field of fuel pumps, in particular to a quick connecting structure for a pump core of a fuel pump. An oil outlet nozzle connector is arranged on the pump core, one end of the quick-change connector is connected with the oil outlet nozzle connector in a sealed mode, the other end of the quick-change connector is connected with an engine through an external oil pipe, a plurality of protruding clamping blocks are arranged on the periphery of the oil outlet nozzle connector, and a clamping ring extending towards the clamping blocks is arranged at the end, close to the oil outlet nozzle connector, of the quick-change connector. The clamping block can be clamped into the hole of the clamping ring, the clamping block is provided with a first sliding-in inclined face inclining towards the center towards the clamping ring, and the end, close to the clamping block, of the clamping ring is provided with a second sliding-in inclined face matched with the first sliding-in inclined face. After the prior art is improved, the quick-change connector and the pump core oil outlet nozzle connector are easy and convenient to install, and the connecting position is clamped firmly and not prone to falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel pumps, in particular to a quick connection structure for a fuel pump core. Background Art

[0002] An electric fuel pump mainly provides fuel with a certain pressure for an automotive fuel injection system. The pump core sucks the oil in the oil sump, passes through the oil outlet nozzle joint of the pump core to the nylon tube on the flange plate and then to the engine, and the return oil returns to the oil sump through the regulator seat after being consumed by the engine. At present, the oil outlet nozzle joint of the electric fuel pump core is directly press-fitted on the nylon tube of the flange plate, which is a disposable device without disassembly and secondary assembly performance. When a failure occurs, the entire fuel pump assembly must be replaced, resulting in waste and high cost.

[0003] In view of this, a detachable connection structure between the oil outlet nozzle joint of a fuel pump core and a flange plate nylon tube is disclosed in the Chinese patent document with the authorization number CN206092384U, which includes an oil outlet nozzle joint arranged on the pump core, a flange plate nylon tube, and a quick-change joint. One end of the quick-change joint is inserted into the flange plate nylon tube, and an inverted buckle is arranged on the outer wall of the part of the quick-change joint inserted into the flange plate nylon tube. The flange plate nylon tube is press-fitted into the inverted buckle of the quick-change joint. The inner part of the oil outlet nozzle joint of the pump core is sleeved on the other end of the quick-change joint, and an annular boss is arranged outside the oil outlet nozzle joint of the pump core. Elastic limit blocks are circumferentially and evenly distributed on the inner wall of the quick-change joint. The annular boss is limited by the elastic limit blocks to prevent the quick-change joint from being withdrawn due to the oil pressure generated in the tube during the operation of the pump core. However, only the elastic limit blocks on the inner wall of the quick-change joint are used to clamp and limit the annular boss. Limited by the spatial size of the inner wall of the quick-change joint, the clamping and limiting strength is limited. When the oil pressure generated in the tube during the operation of the pump core is relatively large, the quick-change joint is still likely to be disengaged from the oil outlet nozzle joint of the pump core due to the insufficient clamping of the elastic limit blocks.

[0004] Therefore, it is necessary to improve the deficiencies of the above prior art. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a quick connection structure for a fuel pump core aiming at the deficiencies of the above prior art, and solve the problem that the connection between the quick-change joint and the oil outlet nozzle joint of the pump core is not firmly clamped and is easy to fall off in the prior art.

[0006] To achieve the above object, the utility model provides the following technical solution: A quick connection structure for a fuel pump core, including a pump core and a quick-change joint. An oil outlet nozzle joint is arranged on the pump core. One end of the quick-change joint is hermetically connected to the oil outlet nozzle joint, and the other end is connected to the engine through an external oil pipe. A plurality of protruding clamping blocks are arranged on the outer periphery of the oil outlet nozzle joint. A clamping ring extending towards the clamping blocks is arranged at one end of the quick-change joint close to the oil outlet nozzle joint. The clamping blocks can be clamped into the holes of the clamping ring.

[0007] By adopting the above technical solution, during installation, the clamping ring of the quick-change joint is aligned with the block on the outer periphery of the oil outlet nozzle joint and the block is inserted into the clamping ring. At the same time, the oil outlet nozzle joint is inserted into the quick-change joint for sealing connection. Since the clamping ring and the block are both arranged on the outer periphery of the quick-change joint and the oil outlet nozzle joint, the size is not limited by space, so the size of the clamping ring and the block is large, so that the clamping is firm and not easy to fall off.

[0008] The above technical solution is further configured as follows: the clamping block is provided with a first sliding inclined surface inclined toward the center toward the clamping ring, and the clamping ring is provided with a second sliding inclined surface matching the first sliding inclined surface near the clamping block end.

[0009] By adopting the above technical solution, during installation, the first sliding bevel of the clamping block and the second sliding bevel of the clamping ring cooperate with each other, so that the clamping ring can easily slide over the clamping block and the farther end of the clamping block can be clamped into the hole of the clamping ring, thereby achieving easier clamping.

[0010] The above technical solution is further configured as follows: a plurality of raised top columns are further provided on the outer periphery of the oil outlet nozzle joint, and the top columns can abut against the side surfaces of the end portion close to the quick-change joint.

[0011] By adopting the above technical solution, the quick-change joint can be axially limited by the abutment between the top column and the end side of the quick-change joint, thereby avoiding axial movement and axial shaking, and improving stability.

[0012] The above technical solution is further configured as follows: an end of the top column close to the quick-change connector is provided with a limiting inclined surface inclined toward the center, and an end of the quick-change connector is provided with an annular inclined surface that can fit with the limiting inclined surface.

[0013] By adopting the above technical solution, the limiting inclined surface of the top column is clamped into the annular inclined surface of the end of the quick-change joint, so that the oil outlet nozzle joint and the quick-change joint can be fixed and limited in the circumferential direction, further improving stability.

[0014] The above technical solution is further configured as follows: an annular groove is provided on the outer periphery of one end of the oil outlet nozzle joint close to the quick-change joint, a sealing ring is provided on the outer sleeve of the annular groove, and the sealing ring is connected to the quick-change joint by interference fit.

[0015] By adopting the above technical solution, a sealing ring is provided between the oil outlet nozzle joint and the quick-change joint to ensure sealing and prevent fuel leakage; the annular groove can limit the sealing ring to prevent it from falling off.

[0016] The above technical solution is further configured as follows: a secondary oil supply interface and a main oil supply interface are provided at one end of the quick-change connector away from the oil outlet connector, and a one-way valve for shutting off or opening the main oil supply interface is provided in the main oil supply interface.

[0017] Adopting the above technical solution, the main fuel supply interface is connected to the engine for supplying fuel to the engine; the secondary fuel supply interface is connected to the ejector joint.

[0018] The beneficial effects achieved by the present utility model are as follows: The quick-change joint and the fuel injection nozzle joint of the pump core are simply and conveniently installed, and the connection part is firmly clamped and not easily detached. Description of the Drawings

[0019] Figure 1 is a schematic structural view of an embodiment of the present utility model;

[0020] Figure 2 is an exploded structural view of an embodiment of the present utility model;

[0021] Figure 3 is Figure 2 a partial view at A in

[0022] Figure 4 is a sectional view of an embodiment of the present utility model. Detailed Embodiment

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Such as Figures 1-4As shown in the figure, a quick connection structure for a fuel pump core includes a pump core 1 and a quick-change joint 2. An oil outlet nozzle joint 3 is provided on the pump core 1. One end of the quick-change joint 2 is hermetically connected to the oil outlet nozzle joint 3, and the other end is connected to the engine through an external oil pipe. A number of protruding clamping blocks 31 are provided on the outer periphery of the oil outlet nozzle joint 3. One end of the quick-change joint 2 close to the oil outlet nozzle joint 3 is provided with a clamping ring 21 extending towards the clamping blocks 31. The clamping blocks 31 can be clamped into the holes of the clamping ring 21. The clamping blocks 31 are provided with a first sliding-in inclined surface 311 inclined towards the center towards the clamping ring 21. The end of the clamping ring 21 close to the clamping blocks 31 is provided with a second sliding-in inclined surface 211 cooperating with the first sliding-in inclined surface 311. A number of protruding ejector pins 32 are also provided on the outer periphery of the oil outlet nozzle joint 3. The ejector pins 32 can abut against the side surface of the end of the quick-change joint 2 close to them. One end of the ejector pin 32 close to the quick-change joint 2 is provided with a limiting inclined surface 321 inclined towards the center. The end of the quick-change joint 2 is provided with an annular inclined surface 22 that can fit with the limiting inclined surface 321. An annular groove 30 is provided on the outer periphery of the oil outlet nozzle joint 3 close to one end of the quick-change joint 2. A sealing ring 4 is sleeved outside the annular groove 30. The sealing ring 4 is connected with the quick-change joint 2 in an interference fit. One end of the quick-change joint 2 far from the oil outlet nozzle joint 3 is provided with a secondary fuel supply port 5 and a main fuel supply port 6. A one-way valve 7 for shutting off or conducting the main fuel supply port is provided in the main fuel supply port 6.

[0025] In the above embodiment, during installation, the clamping ring 21 of the quick-change joint 2 is aligned with the clamping blocks 31 on the outer periphery of the oil outlet nozzle joint 3 and approached. Through the cooperation of the first sliding-in inclined surface 311 of the clamping blocks 31 and the second sliding-in inclined surface 211 of the clamping ring 21, the clamping ring 21 can relatively easily slide over the clamping blocks 31 and the farther end of the clamping blocks 31 can be clamped into the holes of the clamping ring 21. At the same time, the oil outlet nozzle joint 3 is inserted into the quick-change joint 2 and hermetically connected through the sealing ring 4. Since both the clamping ring 21 and the clamping blocks 31 are provided on the outer peripheral surfaces of the quick-change joint 2 and the oil outlet nozzle joint 3, the size is not limited by space. Therefore, the sizes of the clamping ring 21 and the clamping blocks 31 are relatively large, so the clamping is firm and not easy to fall off.

Claims

1. A quick connection structure for a fuel pump core, comprising a pump core and a quick-change joint. An oil outlet nozzle joint is provided on the pump core. One end of the quick-change joint is hermetically connected to the oil outlet nozzle joint, and the other end is connected to the engine through an external oil pipe. It is characterized in that: A plurality of protruding clamping blocks are provided on the outer periphery of the nozzle joint. A clamping ring extending towards the clamping blocks is provided at one end of the quick-change joint close to the nozzle joint, and the clamping blocks can be clamped into the holes of the clamping ring.

2. The quick connection structure of a fuel pump core according to claim 1, characterized in that: The clamping blocks are provided with a first sliding-in inclined surface inclined towards the center facing the clamping ring, and the clamping ring is provided with a second sliding-in inclined surface matching the first sliding-in inclined surface at the end close to the clamping blocks.

3. A quick connection structure for a fuel pump core according to claim 2, characterized in that: A plurality of protruding ejector pins are further provided on the outer periphery of the nozzle joint, and the ejector pins can abut against the side surface of the end of the quick-change joint close to them.

4. A quick connection structure for a fuel pump core according to claim 3, characterized in that: One end of the ejector pin close to the quick-change joint is provided with a limiting inclined surface inclined towards the center, and the end of the quick-change joint is provided with an annular inclined surface that can fit with the limiting inclined surface.

5. A quick connection structure for a fuel pump core according to claim 4, characterized in that: An annular groove is provided on the outer periphery of one end of the nozzle joint close to the quick-change joint, and a sealing ring is sleeved outside the annular groove, and the sealing ring is connected with the quick-change joint in an interference fit.

6. A quick connection structure for a fuel pump core according to any one of claims 1-5, characterized in that: A secondary fuel supply interface and a main fuel supply interface are provided at one end of the quick-change joint far from the nozzle joint, and a one-way valve for shutting off or conducting the main fuel supply interface is provided in the main fuel supply interface.

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