CN2308732Y

CN2308732Y - Plunger

Info

Publication number: CN2308732Y
Application number: CN 97235279
Authority: CN
Inventors: 阮华红
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-08-18
Filing date: 1997-08-18
Publication date: 1999-02-24
Anticipated expiration: 2007-08-18

Abstract

The utility model relates to a plunger used for hand operated high pressure pumps, which is composed of plunger sleeves, joints which are arranged on the two ends of the plunger sleeves, covers, and connecting rods which are fixedly connected with the joints and the covers. When the utility model is used and worn, the plunger can be reassembled and used after that the plunger sleeves are only disassembled and replaced. Therefore, the utility model overcomes waste phenomenon during the periods of the replacement of the plunger and has the advantages of materials saving, convenient replacement, simple fabrication, good wear-resistant properties, etc.

Description

Plunger

The utility model belongs to the plunger field, especially for the plunger on the high pressure manual pump.

Generally by the punching press once-through, its plunger body material therefor is big for existing plunger, the cost height, and particularly the plunger after the wearing and tearing needs integral replacing, therefore causes waste of material.

The purpose of the utility model is to provide a kind of cost low, the plunger of replaceable plunger bushing.

The technical solution of the utility model is achieved in that it comprises plunger bushing, is contained in the joint on plunger bushing top, covers the stifle in the plunger bushing bottom, is connected with coupling shaft between stifle and the joint.

Behind the utility model combination forming, do not change the original form structure of plunger, do not influence its physical property; After using wearing and tearing, as long as unload lower contact and stifle, change plunger bushing, group is new synthetic again, can reuse.Therefore, save raw material, overcome the wasting phenomena in the plunger replacing process, alleviated the weight of plunger, improved working efficiency; Advantages such as it is convenient to have replacing, makes simply, and wear resistance is good.

The utility model will be further described below in conjunction with embodiment shown in the drawings.

Fig. 1 is a structural representation of the present utility model.

Plunger is by plunger tube 2, plugs together at the joint 1 on plunger tube 2 tops to form with the coupling shaft 3 of joint 1 with covering at the stifle 5 of plunger tube 2 bottoms and being connected stifle 5.

Plunger tube 2 is tubular, and outside thread is arranged at joint 1 top, is connected with the plunger rod of pump, and the flange of position-limiting action has been arranged at joint 1 bottom, and joint 1 bottom center is shaped on groove, and groove has internal thread, and is connected with coupling shaft 3 end thread.

Stifle 5 external diameters are equal to or slightly less than plunger tube 2 internal diameters, and its end face has had the center of the flange stifle 5 of position-limiting action that thread groove is arranged, and coupling shaft 3 screw fixed are on stifle 5 grooves.

Stifle 5 sidewalls have ring recess, and ring recess is embedded with " O " type circle 5, to guarantee the sealing between stifle 5 and the plunger tube 2.

Coupling shaft 3 two ends are shaped on screw thread, and are matched with the groove at stifle 5 and joint 1 center, are fixed on plunger tube 2 two ends to guarantee stifle 5, joint 1.

Claims

1, a kind of plunger comprises plunger bushing (2), is contained in the joint (1) on plunger bushing (2) top, it is characterized in that: plunger bushing (2) bottom is covering stifle (5), is connected with coupling shaft (3) between stifle (5) and the joint (1).

2, plunger according to claim 1 is characterized in that: stifle (5) sidewall has the cast groove, and round section joint ring (4) is housed in the groove.