CN202162748U

CN202162748U - Piston device

Info

Publication number: CN202162748U
Application number: CN2011202713819U
Authority: CN
Inventors: 杨政委
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-29
Filing date: 2011-07-29
Publication date: 2012-03-14
Anticipated expiration: 2021-07-29

Abstract

The utility model discloses a piston device, comprising a piston, a connection rod (1) and a spherical head (2), wherein the piston includes a piston head (3) with a spherical indent, and a piston rod (4) with an axial through hole; the spherical head (2) connected with the connection rod (1) is fitted in the spherical indent of the piston head (3) through the through hole; the piston rod (4) and the piston head (3) are moulded integrally; and a limiting device for preventing the spherical head (3) from separating from the spherical indent is positioned in a cavity forming by the through hole and the spherical indent. The piston head and the piston rod have high coaxiality and are not easy to leak oil between the spherical head and the spherical indent. The piston device of the utility model belongs to the technical field of the piston device.

Description

Piston apparatus

Technical field

The utility model relates to a kind of piston apparatus that is applied on the hydraulic spanner equipment.

Background technology

Existing a kind of piston apparatus that uses on the hydraulic spanner that is engaged in comprises piston, connecting rod 01 and bulb 02, and piston comprises piston head 03 and piston rod 04, and the bulb 02 that links to each other with connecting rod 01 is engaged in the spherical indent of piston head 03, and is as shown in Figure 1.Piston head 03 and piston rod 04 separate being processed to form, both are threaded in employing.

Not enough below said structure exists: 1, piston head and piston rod are independently processed, very difficult assurance axiality between the two, processing trouble; 2, piston head is connected with piston rod thread, and the easy oil impregnate in screw-on place influences piston apparatus and stretches between bulb and the bulb indent, causes and can't normally use.

Summary of the invention

The utility model technical problem to be solved is: a kind of piston head and piston rod axiality height is provided and is difficult for oil impregnate to the piston apparatus between bulb and the bulb indent.

The utility model technical scheme of taking that contracts is: a kind of piston apparatus; Comprise piston, connecting rod and bulb; Piston comprises piston head and the tape spool of the dribbling shape indent piston rod to through hole; The bulb that links to each other with connecting rod passes through hole and is engaged in the spherical indent of piston head, and described piston rod and piston head are one-body molded, is provided with the stopping means that prevents bulb separable spherical indent in the cavity that through hole and spherical indent form.

Described stopping means is that cavity inner wall is provided with annular groove, is combined with interior snap ring on the annular groove, is provided with the annular ball cup that increases with the bulb contact area between interior snap ring and the bulb outer end.

The beneficial effect of the utility model is: the piston head and the piston rod of the utility model are one-body molded, add can effectively guarantee axiality between the two man-hour, and be easy to process, also can effectively avoid oil to be seeped between bulb and the spherical indent simultaneously.

Description of drawings

Fig. 1 is existing piston apparatus cutaway view.

Fig. 2 is the utility model cutaway view.

Fig. 3 is the utility model piston cutaway view.

Fig. 4 is the connecting rod and the bulb of the utility model.

Fig. 5 is an A place enlarged drawing among Fig. 2.

Among the figure, 01. connecting rod, 02. bulb, 03. piston head, 04. piston rod; 1. connecting rod, 2. bulb, 3. piston head, the 3-1. annular groove, 4. piston rod, 5. in snap ring, 6. annular ball cup.

The specific embodiment

Below be the utility model preferred embodiment, but therefore do not limit the protection domain of the utility model.

With reference to Fig. 1-shown in Figure 5; A kind of piston apparatus; Comprise piston, connecting rod 1 and bulb 2, piston comprises the piston head 3 and the piston rod 4 of tape spool to through hole of dribbling shape indent, and the bulb 2 that links to each other with connecting rod 1 passes through hole and is engaged in the spherical indent of piston head 3; Described piston rod 4 is one-body molded with piston head 3, can effectively guarantee both axialities when processing through hole and spherical indent; Be provided with the stopping means that prevents bulb 2 separable spherical indents in the cavity that through hole and spherical indent form.

Described stopping means is that cavity inner wall is provided with annular groove 3-1, and snap ring 5 in being combined with on the annular groove 3-1 is provided with the annular ball cup 6 that increases with bulb 2 contacts area between interior snap ring 5 and bulb 2 outer ends.Described ball cup 6 is a block, and the block top is provided with the indent that matches with bulb 2 outer end profiles and is axially arranged with is convenient to be enclosed within the through hole outside the connecting rod 1.

Claims

1. piston apparatus; Comprise piston, connecting rod (1) and bulb (2); Piston comprises piston head (3) and the tape spool of the dribbling shape indent piston rod (4) to through hole; The bulb (2) that links to each other with connecting rod (1) passes through hole and is engaged in the spherical indent of piston head (3), it is characterized in that: described piston rod (4) and piston head (3) are one-body molded, are provided with the stopping means that prevents bulb (2) separable spherical indent in the cavity that through hole and spherical indent form.

2. piston apparatus according to claim 1; It is characterized in that: described stopping means is that cavity inner wall is provided with annular groove (3-1); Be combined with interior snap ring (5) on the annular groove (3-1), be provided with the annular ball cup (6) that increases with bulb (2) contact area between interior snap ring (5) and bulb (2) outer end.