CN201155643Y

CN201155643Y - Self locking fast joint

Info

Publication number: CN201155643Y
Application number: CNU2007201202025U
Authority: CN
Inventors: 董超华
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-05-21
Filing date: 2007-05-21
Publication date: 2008-11-26
Anticipated expiration: 2017-05-21

Abstract

The utility model discloses a self-locking quick joint, which comprises a hollow hexagonal part, and a joint body which is formed by connecting a circular tube with a cross bore by thread, and a spring, a joint core body, two O-shaped seal rings, and a self-locking inner shield ring are orderly and coaxially arranged in the interior of the joint body from back to front; wherein, the exterior of the joint body is provided with the self-locking outer shield ring, the spring, a steel ball and an opening closing ring; when a public joint is inserted, the spring in the joint body is compressed, and the joint core body, the two O-shaped seal rings and the self-locking inner shield ring are axially and simultaneously moved from front to back; under the action of the spring arranged on the exterior of the joint body, the self-locking outer shield ring moves forward to the opening closing ring, and the steel ball is blocked by a step small diameter, thus blocking the public joint, and realizing the self-locking quick connection of a fluid pipeline; and compared with the present structure, the self-locking quick joint of the utility model shortens the lengths of a whole product and the joint core body, prolongs the inner diameter of the joint core body, and increases flow, and moreover, has easier manufacturing and lower processing cost, is not easy for the seal ring to be exfoliated, and improves sealing performance.

Description

Self locking quick connector

Technical field

The utility model relates to a kind of self locking quick connector that the pneumatic system gas circuit connects fast that is used for.

Background technique

Existing self locking quick connector includes a fittings body, in fittings body from after be coaxially arranged with collar forward successively, two O RunddichtringOs, core body, spring, plain washer, back-up ring outside fittings body is outside equipped with self-locking, spring, steel ball, expanding ring, wherein the spring housing of fittings body inside is in the external diameter outside of core body, and core body is long to be difficult for processing, and the core body internal diameter is little, and flow is little, and plain washer is stuck in the core body front end, because the core diameter restriction, screens is little to come off easily, influences product quality and performances.

Summary of the invention

Technical problem to be solved in the utility model is to provide a kind of easy to manufacture and improve the self locking quick connector of the performance requirement of existing product at above-mentioned prior art present situation.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: self locking quick connector, include a hollow hexagonal part and the fittings body of a pipe by being threaded and forming, in fittings body by after be coaxially arranged with spring forward successively, the joint core body, two O RunddichtringOs, self-locking inner shield ring, the outer installment of fittings body has the outer back-up ring of self-locking, spring, steel ball, expanding ring is formed.It is characterized in that when male is inserted, the compression of fittings body inner spring, joint core body, two O RunddichtringOs and self-locking inner shield ring axially move in the past backward simultaneously, under the effect of fittings body external springs, the outer back-up ring reach of self-locking, its step moves to the expanding ring place, and the little internal diameter of step of the outer back-up ring of self-locking blocks steel ball, thereby block male, realize that self-locking connects fast; The fittings body inner spring places the back of joint core body, makes core body can do weak point, and internal diameter is done big flow and increased; Individual seal groove position and cross-drilled hole are arranged on the joint core body, seal ring is enclosed within the seal groove position on the joint core body, a seal ring places between joint core body and the self-locking inner shield ring, and joint core body, two seal rings and self-locking inner shield ring can axially slide front and back at the inwall of fittings body; The back of hexagonal part can connect multi-form structural member and change different connection modes.

Compared with prior art, the utility model places joint core body back with the fittings body inner spring, seal ring is enclosed within the seal groove position on the joint core body, makes entire product and joint core body shorten length, and the joint core diameter increases, thereby flow increases, manufacturing is more prone to, and processing cost is lower, and the screens of seal ring increases, the seal ring difficult drop-off improves sealability.

Description of drawings

Fig. 1 is a whole cross-sectional schematic before the connection of the present utility model;

Fig. 2 is that male of the present utility model connects the whole cross-sectional schematic in back;

Specific embodiments

Below in conjunction with accompanying drawing the utility model is described in further detail.

As shown in Figure 1: from latching connector before male connects, self locking quick connector includes a hollow hexagonal part 1 and a pipe 12 by the integral connector body that is threaded, by 6 sealings of O RunddichtringO, wherein pipe 12 has the cross-drilled hole circumference of six band taperings evenly to distribute, the cross-drilled hole diameter is big at the little outer wall of round tube inner wall, place six steel balls respectively, steel ball can enter round tube inner wall, but can not pass the round tube inner wall hole, in fittings body by after be coaxially arranged with spring 2 forward successively, 3, two O RunddichtringOs 4 of joint core body and 8, self-locking inner shield ring 9, a seal groove position and cross-drilled hole are arranged on its middle joint core body 3, seal ring 4 just is stuck on the seal groove position of joint core body, and seal ring 8 places between joint core body and the self-locking inner shield ring, seal ring, joint core body and self-locking inner shield ring can axially slide front and back at the inwall of fittings body, the outer installment of fittings body has the outer back-up ring 5 of self-locking, spring 7, steel ball 10, expanding ring 11 is formed.Fittings body endosome fluid flows in the direction of arrows by hollow hexagonal part 1 back, under the effect of spring 2 with joint core body 3, two

O RunddichtringOs

4 and 8, the coaxial together front of pushing to of self-locking inner shield ring 9, position as shown in Figure 1, joint core body 3 contacts with the ear end face of seal ring 4 with fittings body 12, and cause fluid to end herein, the external diameter loxosis of the inner shield ring of self-locking simultaneously 9 is limited in the position of the internal diameter loxosis of fittings body 12, six steel balls 10 are released the cross-drilled hole inwall of fittings body 12, make steel ball 10 block the step position of the outer back-up ring 5 of self-locking, realize connecting preceding sealing state.

As shown in Figure 2: male connects the back self-locking state, after male 13 is inserted in the past backward, male 13 is with joint core body 3, two

O RunddichtringOs

4 and 8, the self-locking inner shield ring 9 coaxial positions as shown in Figure 2, back of pushing to, with spring 2 compressions, seal ring 4 leaves the ear end face of fittings body 12, fluid passes through the cross-drilled hole of joint core body 3 by flowing to joint core body endoporus shown in the arrow by the back of hollow hexagonal part 1, flow to the endoporus of male 13 again, realize being communicated with, under the internal diameter seal action of the external diameter of 8 pairs of males 13 of seal ring and fittings body 12, fluid can not leak, and the cross-drilled hole inwall that while steel ball 10 falls into fittings body 12 is stuck in the steel ball draw-in groove of male 13, and the outer back-up ring 5 of self-locking is pushed to the front under the effect of spring 7, blocked at the step position of the outer back-up ring 5 of self-locking by expanding ring 11, and the little internal diameter of step of the outer back-up ring 5 of self-locking blocks steel ball 10, thereby blocks sub 13, finishes self-locking and connects fast.

Thereby can also connecting the structural member of obstructed form, the back of the hollow hexagonal part 1 of fittings body can change the different installation Connecting format of self locking quick connector.

Claims

1, self locking quick connector, it is characterized in that: by a hollow hexagonal part and the pipe spare that cross-drilled hole is arranged by the integral connector body that is threaded, fittings body inside from after be coaxially arranged with spring forward successively, the joint core body, two O RunddichtringOs, self-locking inner shield ring, the outer installment of fittings body has the outer back-up ring of self-locking, spring, steel ball, expanding ring.

2, self locking quick connector according to claim 1 is characterized in that: the fittings body inner spring places the back of joint core body.

3, self locking quick connector according to claim 1, it is characterized in that: individual seal groove position and cross-drilled hole are arranged on the joint core body, O RunddichtringO is enclosed within the seal groove position on the joint core body, and an O RunddichtringO places between joint core body and the self-locking inner shield ring.

4, self locking quick connector according to claim 1 is characterized in that: joint core body, seal ring and self-locking inner shield ring can axially front and back slips in fittings body.