CN203201781U

CN203201781U - Improved structure of diesel pump body

Info

Publication number: CN203201781U
Application number: CN 201320181433
Authority: CN
Inventors: 袁源远
Original assignee: Wuxi Bojin Precision Machinery Manufacturing Co Ltd
Current assignee: Wuxi Bojin Precision Machinery Manufacturing Co Ltd
Priority date: 2013-04-12
Filing date: 2013-04-12
Publication date: 2013-09-18
Anticipated expiration: 2023-04-12

Abstract

The utility model relates to an improved structure of a diesel pump body, comprising a plurality of lead holes, wherein adjacent lead holes are communicated through circular through holes; with the improved structure of the diesel pump body, the oil leakage problem of the pump body is effectively improved, meanwhile the reliability and production efficiency of the pump body are also improved, and the cost is reduced.

Description

A kind of structure-improved of the diesel oil pump housing

Technical field

The utility model relates to the diesel pump technical field, especially a kind of structure of the diesel oil pump housing of process improvement.

Background technique

The pump housing is as the critical component of diesel pump, the reliability of its quality also directly affects the reliability of diesel pump, make at present the mode that the pump housing mainly adopts casting, but because casting manufacturing efficiency is low, cost is high, and the manufacturing efficiency of die casting is high, cost is low, and the pump housing quality that die casting goes out is higher, yet because pump body structure design unreasonable, during Die Casting, also have variety of issue, Fig. 1 to 3 is depicted as the pump body structure of the BQ pump that uses on the existing market, and diesel oil hole 2 ＇s perpendicular with helical pitch hole 1 ＇ that plunger is installed are square opening, although its conducting cross section is large, material-saving, use the die casting mode to produce, expect this square diesel oil hole 2 ＇, must increase respectively at the two ends of diesel oil hole 2 ＇ a square inserted sheet on its mould, although can finally obtain square diesel oil hole 2 ＇ by this kind mode, also can produce following problem thereupon:

1, during die casting, alloy melts the excess Temperature of liquid, and two square inserted sheets are deformed, and has a strong impact on precision and the mold use life-span of diesel oil hole 2 ＇, and is also higher to the requirement of mould;

2, after the pressurize cooling, when two inserted sheets are extracted out, diesel oil hole 2 ＇ of moulding are square through hole, also need to carry out plug-hole at the end 3 ＇ places of diesel oil hole 2 ＇, cause the pump housing in actual use, along with the long-time strenuous vibration of diesel pump, oil leakage phenomenon very easily appears in terminal 3 ＇ places, and the reliability of the pump housing is seriously reduced;

Comprehensive above 2 points, Fig. 1 is unreasonable to pump body structure shown in Figure 3, directly cause the pump housing of final die casting to have serious safe mass hidden danger and the low defective of reliability, and cost of production is high, and the life-span of mould is limited.

The model utility content

The applicant provides a kind of structure-improved of the diesel oil pump housing for above-mentioned shortcoming of the prior art, and it effectively improves the problem of pump housing leakage of oil, also can improve reliability and the manufacturing efficiency thereof of the pump housing simultaneously, has reduced cost.

The technological scheme that the utility model adopts is as follows:

A kind of structure-improved of the diesel oil pump housing comprises several helical pitch holes, links to each other through the manhole conducting between the adjacent channel hole;

Further technological scheme is as follows:

All with shoe cream room, manhole is positioned at the shoe cream room place in described each helical pitch hole.

The beneficial effects of the utility model are: save the square inserted sheet on the die casting mould, needn't carry out plug-hole to the pump housing again, but rheo-die-casting molds the helical pitch hole, process shoe cream room in subsequent handling, and between two shoe cream rooms, process through hole, each helical pitch hole is communicated, consist of the diesel oil hole of the pump housing, the harmful effect of effectively having avoided the distortion of mould inserted sheet to bring has also avoided the pump housing because of the oil leakage phenomenon that plug-hole occurs simultaneously, has improved the reliability of the pump housing and the die casting efficient of the pump housing thereof.

Description of drawings

Fig. 1 is the main sectional view of the existing BQ pump pump housing.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 3 is the B-B sectional view of Fig. 1.

Fig. 4 is the main sectional view of the BQ pump pump housing after the utility model improvement.

Fig. 5 is the C-C sectional view of Fig. 4.

Fig. 6 is the D-D sectional view of Fig. 4.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is described.

As shown in Figure 4, the utility model comprises several helical pitch holes 1, and via through holes 4 conductings link to each other between the adjacent channel hole 1, each helical pitch hole 1 is interior all with shoe cream room 2, and through hole 4 is positioned at shoe cream room 2 places, has consisted of the diesel oil hole of the pump housing, through hole 4 is circular port, can obtain by drilling operating processing; The structure-improved of this kind pump housing obtains like this, at first, when die casting, the pump housing that obtains is without the diesel oil hole, then use button-head cutter to stretch in the helical pitch hole 1, process first shoe cream room 2, be equivalent to that the part is carried out in helical pitch hole 1 and expand the chamber, after processing shoe cream room 2, wall thickness attenuation between the two adjacent helical pitch holes guarantees that shoe cream room 2 all is on the same straight line and the hanging basket end of the close pump housing, then processes circular through hole 4 by drilling operating between adjacent two shoe cream rooms 2, form the diesel oil hole of the pump housing, needn't carry out follow-up plug-hole at the end 3 in diesel oil hole; This kind structure can effectively be avoided obtaining square diesel oil hole by increase inserted sheet in mould in the prior art, and then the pump housing carried out plug-hole and cause reduce die life, the phenomenon of leakage of oil appears in the pump housing, reach raising pump housing reliability and manufacturing efficiency, reduced the good effect of the cost of production of the pump housing.

Above description is to explanation of the present utility model, is not the restriction to model utility, and the utility model limited range within protection domain of the present utility model, can be done any type of modification referring to claim.

Claims

1. the structure-improved of a diesel oil pump housing comprises several helical pitch holes (1), it is characterized in that: link to each other through manhole (4) conducting between adjacent channel hole (1).

2. the structure-improved of a kind of diesel oil pump housing as claimed in claim 1, it is characterized in that: all with shoe cream room (2), manhole (4) is positioned at shoe cream room (2) and locates in each helical pitch hole (1).