Plunger pump body positioning and pressing structure

Abstract

The utility model discloses a plunger pump body positioning and pressing structure which comprises a pressing head body, a containing cavity is formed in the pressing head body, and the shape of the containing cavity is matched with that of a pump head. A plurality of groups of screw holes are formed in the pressure head main body; and a positioning device is arranged on one side of the pressure head main body. The pump body screw is convenient to install and tighten, the installation efficiency is improved, and the risk that the pump body is installed by mistake is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of high-pressure common rail diesel pumps, in particular to a plunger pump body positioning and pressing structure. Background Art

[0002] With the continuous improvement of domestic emission standards, domestic diesel engine OEMs generally adopt high-pressure common rail technology to meet these standards. The high-pressure common rail system refers to a fuel supply method that completely separates the generation of injection pressure and the injection process from each other in a closed-loop system composed of a high-pressure common rail pump, injector, common rail pipe, sensor and ECU. When working, the high-pressure common rail pump can convert low-pressure fuel into high-pressure fuel and transport it to the common rail pipe for storage. Under the control of the ECU, the fuel in the common rail pipe is accurately sprayed out through the injector. The electronically controlled high-pressure common rail injection technology can easily achieve the control of rapid adjustment of the injection amount. In addition, the high-speed injector that can accurately control the opening and closing time can easily realize the control of the injection time, so the start and end of the injection can be changed according to the engine working conditions.

[0003] The high-pressure common rail pump consists of a pump body, a plunger and plunger ring, a camshaft and a push rod, a fuel supply pump and other components. When assembling the plunger pump head of the existing pump body, since the spring of the pump head is in a free state, the spring needs to be compressed so that the lower end of the pump head fits with the pump body mounting surface before it can be connected with screws. During the normal assembly process, the pump head needs to be manually squeezed downward, and the positions of the four screw holes need to be adjusted, which is time-consuming and labor-intensive. In addition, during the assembly process, the number of pre-tightened screws is small, which cannot overcome the spring force of the pump body, causing the screw to disengage and damage the mounting thread, resulting in additional scrap. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a plunger pump body positioning and clamping structure, which facilitates the installation and tightening of pump body screws, improves installation efficiency, and reduces the risk of incorrect installation of the pump body.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a plunger pump body positioning and clamping structure, including a pressure head body, a receiving cavity is arranged in the pressure head body, and the shape of the receiving cavity matches the shape of the pump head; a plurality of groups of screw holes are arranged on the pressure head body; and a positioning device is arranged on one side of the pressure head body.

[0006] As a preferred technical solution of the utility model: the positioning device includes a positioning plate and a support block arranged on the pressure head body, the support block is provided with a cylinder, and the cylinder is connected to the clamping rod; the direction is toward the accommodating cavity.

[0007] As a preferred technical solution of the utility model: a positioning hole is arranged on the support block, the cylinder is arranged at one end of the positioning hole, and the pressing rod is arranged in the positioning hole.

[0008] As a preferred technical solution of the utility model: a proximity switch is arranged in the accommodating cavity.

[0009] As a preferred technical solution of the utility model: a positioning pin hole is arranged above the pressure head body.

[0010] The utility model has the following beneficial effects:

[0011] 1. It is easy to install and tighten the pump body screws, which improves the installation efficiency and reduces the risk of wrong installation of the pump body.

[0012] 2. The accommodating cavity is contoured to the pump head to ensure that the pump head is positioned accurately and uniquely.

[0013] 3. The setting of the proximity switch realizes automatic locking of the pump head after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 for Figure 1 The upper and lower isometric drawings;

[0016] Figure 3 for Figure 1 The main view of

[0017] Figure 4 for Figure 1 Right view of;

[0018] Figure 5 for Figure 1 Rear view of

[0019] Figure 6 for Figure 1 A top view of

[0020] Figure 7 It is a schematic diagram of the overall structure of the pump head;

[0021] Figure 1-Figure 7 Among them, 1. pressure head body; 2. accommodating chamber; 3. pump head; 4. screw hole; 5. positioning plate; 6. support block; 7. cylinder; 8. clamping rod; 9. positioning hole; 10. proximity switch; 11. connecting column; 12. positioning pin hole; 13. first screw hole; 14. positioning device. DETAILED DESCRIPTION

[0022] In order to make the purpose and advantages of the utility model more clear, the utility model is further described in detail in conjunction with the embodiments below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0023] like Figure 1-Figure 7 As shown, the embodiment of the utility model provides a plunger pump body positioning and clamping structure, including a pressure head body 1, a receiving chamber 2 is provided in the pressure head body 1, and the shape of the receiving chamber 2 matches the shape of the pump head 3, that is, the top of the pump head 3 is used in the receiving chamber 2, so that the upper part of the pump head 3 can be fitted with the lower end of the pressure head body 1; the receiving chamber 2 is contoured with the outer features of the pump head 3 to ensure that the position of the pump head 3 is accurate and unique; the pressure head body 1 is provided with multiple groups of screw holes 4, preferably four groups in this embodiment. The diameter of the screw hole 4 is larger than the diameter of the screw to be installed on the pump head 3, and the position of the screw hole 4 matches the first screw hole 13 on the pump head 3; a positioning device 14 is provided on one side of the pressure head body 1, and the positioning device 14 is used to position the pump head 3. After the positioning device positions the pump head 3, the screw is connected to the first screw hole 13 through the screw hole 4, and the pump head 3 to be connected and the pump body are connected together. It is convenient to install and tighten the pump body screws, improve the installation efficiency, and reduce the risk of misinstallation of the pump body.

[0024] The positioning device 14 includes a positioning plate 5 disposed on the pressure head body 1, a support block 6 is disposed on the pressure head body 1 on the side opposite to the positioning plate 5, a cylinder 7 is disposed on the support block 6, the cylinder 7 is connected to a clamping rod 8, the clamping rod 8 faces the direction of the accommodating chamber 2, and the pump head 3 is positioned by the cooperation of the cylinder 7 and the positioning plate 5. In this embodiment, in order to facilitate the installation of the cylinder 7, the support block 6 is in a stepped shape, one section of the support block 6 is connected to the pressure head body 1, and the other section faces the direction away from the pressure head body 1; a positioning hole 9 is disposed on the support block 6 facing the side away from the pressure head body 1, the cylinder 7 is disposed at one end of the positioning hole 9, and the clamping rod 8 is disposed in the positioning hole 9. In order to reduce the workload of personnel, a proximity switch 10 is provided in the accommodating chamber 2. When the pump head 3 is placed in the accommodating chamber 2, the proximity switch 10 senses the workpiece and transmits the signal to the control device. The control device starts the cylinder 7 to automatically lock the workpiece. It can be understood that the electrical connection between the proximity switch 10 and the cylinder 7 can also adopt other methods in the prior art, using the proximity switch 10 to directly connect with the cylinder 7 electrically. When the workpiece is sensed, the proximity switch 10 starts the cylinder 7. A connecting column 11 is provided on the top of the pressure head body 1 for convenient connection with the clamping device. The clamping device is used to clamp the pump head 3 and the pump body when in use. In order to ensure the accuracy of the position after each change of type, a positioning pin hole 12 is provided above the pressure head body 1.

[0025] The working principle of this specific implementation is: when assembling the pump head 3, adjust the position of the pump head 3, the outer flat part is in contact with the positioning plate 5 and inserted into the pressure head body 1. After the proximity switch 10 on the pressure head body 1 senses the pump head 3, the cylinder 7 is started to clamp the pump head 3.

[0026] Pull the pump body to the bottom of the pump head 3, press the pump head 3 into the pump body with the clamping device, manually insert four screws from the screw hole 3, tighten the screws in the first screw hole 13 with an electric gun, then loosen the cylinder 7, lift the clamping device, and the assembled pump body flows to the next station.

[0027] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A plunger pump body positioning and pressing structure, characterized in that: The invention comprises a pressure head body (1), wherein a receiving cavity (2) is arranged inside the pressure head body (1), and the shape of the receiving cavity (2) matches the shape of a pump head (3); a plurality of groups of screw holes (4) are arranged on the pressure head body (1); and a positioning device (14) is arranged on one side of the pressure head body.

2. A plunger pump body positioning and pressing structure according to claim 1, characterized in that: The positioning device (14) comprises a positioning plate (5) and a support block (6) arranged on the pressure head body (1); the support block (6) is provided with a cylinder (7); the cylinder (7) is connected to a clamping rod (8); and the clamping rod (8) faces the direction of the accommodating chamber (2).

3. A plunger pump body positioning and pressing structure according to claim 2, characterized in that: The support block (6) is provided with a positioning hole (9), the cylinder (7) is arranged at one end of the positioning hole (9), and the pressing rod (8) is arranged in the positioning hole (9).

4. A plunger pump body positioning and pressing structure according to claim 2, characterized in that: A proximity switch (10) is arranged in the accommodating cavity (2).

5. A plunger pump body positioning and pressing structure according to any one of claims 1 to 4, characterized in that: A positioning pin hole (12) is provided above the pressure head body (1).

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