CN205716137U - Quick connector - Google Patents

Abstract

The utility model discloses a quick connector, which is connected to the light hole of a part to be tested, and comprises: a cylinder; a mandrel, which is arranged in the cylinder and protrudes from the first end of the cylinder; an expansion sleeve, The expansion sleeve is set on the mandrel protruding from the cylinder; the handle is set on the second end of the cylinder; wherein: the end of the mandrel protruding from the cylinder forms a first step opposite to the end face of the first end of the cylinder On the surface, the expansion sleeve is located between the end surface of the first end of the cylinder body and the first step surface, so that when the core shaft moves to the second end of the cylinder body, the first step surface pushes against the expansion sleeve to make the outer diameter of the expansion sleeve change. Big. Since the expansion sleeve with elasticity is set on the mandrel, when the expansion sleeve is not pushed by the mandrel, the outer diameter of the expansion sleeve is slightly smaller than the diameter of the light hole, and the expansion sleeve can be inserted into the light hole; when the expansion sleeve is pressed by the core When the shaft is pushed, the outer diameter of the expansion sleeve becomes larger and expands tightly in the light hole, thereby realizing a sealed connection. The sealing connection mode of the utility model has ingenious design, simple structure, convenient operation and good sealing performance.

Description

quick connector

technical field

The utility model relates to a connector used for quickly sealing and connecting light holes.

Background technique

In the prior art, in order to inflate the cavity of the part, the worker needs to connect a connector at the outlet end of the inflation tube (the inlet end of the inflation tube is connected to the air pump), and the connector is used to connect with the inflation joint of the part (the shape is Cylindrical with an inner hole) for a sealed connection to prevent gas from leaking from the gap between the inflatable joint and the connector. In order to realize the connection and sealing with the inflatable joint at the same time, in the prior art, the connector and the inflatable joint are usually threaded, and then sealed with an O-ring. However, this way of threaded connection needs to make the connector and the inflatable joint rotate relative to each other, which will inevitably increase the complexity of the operation of connecting the connector and the inflatable joint, and when the inner hole of the inflatable joint is a light hole (the hole wall of the light hole When there is no thread), the connector cannot be connected with the inflatable joint.

Utility model content

Aiming at the above-mentioned technical problems existing in the connectors in the prior art, the utility model provides a quick connector capable of quickly sealing the connection light hole, the quick connector has simple structure and operation, and good sealing performance.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A quick connector, connected to the light hole of the part to be tested, comprising: a cylinder body, which has an air-filling hole communicating with the light hole to inflate the light hole; a mandrel, which is arranged on the cylinder body and protruding from the first end of the cylinder; expansion sleeve, which is made of elastic material, and the expansion sleeve is sleeved on the mandrel protruding from the cylinder; the handle is arranged on the The second end of the cylinder is used to drive the mandrel to move in the axial direction of the cylinder; wherein: the end of the mandrel protruding from the cylinder is formed with the first end of the cylinder The first stepped surface opposite to the end surface of the cylinder, the expansion sleeve is located between the end surface of the first end of the cylinder and the first stepped surface, so that when the core axis moves to the second end of the cylinder , the first stepped surface pushes against the expansion sleeve to increase the outer diameter of the expansion sleeve.

Preferably, the handle is pivotally connected to the second end of the cylinder, and drives the spindle to move through pivoting.

Preferably, it also includes an end cover threadedly connected to the second end of the cylinder body, the handle abuts on the end cover, and the end cover pushes against the handle by rotation to drive the mandrel to move on the The axial direction of the cylinder body is moved upwards, so as to adjust the distance between the first stepped surface and the end surface of the second end of the cylinder body, so that the outer diameter of the expansion sleeve changes.

Preferably, it further includes a piston disposed in the cylinder and a pull rod connected to the piston, the mandrel is connected to the piston, and the pull rod is pivotally connected to the handle.

Preferably, the inflation hole is radially opened on the cylinder body of the cylinder body, and a gas chamber communicating with the inflation hole is formed in the cylinder body, and an end communicated with the gas chamber is formed inside the mandrel , the other end of which communicates with the light hole.

Preferably, the gas chamber is an annular cavity surrounded by the cylinder and the mandrel, and the two ends of the annular cavity are directed from the piston to the end surface of the first end of the cylinder. and a second stepped surface formed in the cylinder body and opposite to the end surface facing the first end of the cylinder body.

Preferably, a spring with two ends abutting against the end surface facing the first end of the cylinder and the second stepped surface is further provided in the gas chamber.

Preferably, sealing rings are provided between the mandrel and the cylinder, and between the piston and the cylinder.

Preferably, the pull rod is integrally formed with the piston.

Compared with the prior art, the beneficial effect of the quick connector of the utility model is that since the elastic expansion sleeve is sleeved on the mandrel, when the expansion sleeve is not pushed by the mandrel, the outer diameter of the expansion sleeve is slightly smaller than The diameter of the light hole, the expansion sleeve can be inserted into the light hole; when the expansion sleeve is pushed by the mandrel, the outer diameter of the expansion sleeve becomes larger and expands tightly in the light hole, thereby realizing a sealed connection. The sealing connection mode of the utility model has ingenious design, simple structure, convenient operation and good sealing performance.

In addition, by rotating the end cap, the outer diameter of the expansion sleeve in the initial state (the state without handle operation) can be adjusted, so that the expansion sleeve can achieve a sealed connection with light holes of different diameters, which increases the scope of application of the quick connection.

Description of drawings

Fig. 1 is a schematic structural view of a quick connector of the present invention in an installed state;

Fig. 2 is a schematic structural view of the quick connector of the present invention in an inflated state.

In the picture:

10-cylinder body; 11-gas filling hole; 12-gas chamber; 13-second step surface; 14-first gasket; 20-mandrel; 21-first step surface; 22-air guide hole; 23-the first Two gaskets; 30-expansion sleeve; 40-handle; 50-end cover; 60-piston; 70-tie rod; 80-sealing ring; 90-spring; 100-parts to be tested;

detailed description

In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1 and Fig. 2, the embodiment of the present utility model provides a kind of quick connector, and this quick connector is used to be connected on the optical hole 101 of part 100 to be tested, and this quick connector comprises: cylinder body 10, Mandrel 20, expansion sleeve 30 and handle 40. The cylinder body 10 is formed with an air filling hole 11, and the air filling hole 11 leads to the light hole 101 to fill the light hole 101 with pressure gas; One end protrudes; the expansion sleeve 30 is made of deformable elastic material, and the expansion sleeve 30 is sleeved on the part of the mandrel 20 protruding from the cylinder body 10; the handle 40 is installed on the second end of the cylinder body 10, and the handle 40 can be directly or indirectly connected with the other end of the mandrel 20 to drive the mandrel 20 to move in the axial direction of the cylinder 10; On the first stepped surface 21 opposite to each other, the expansion sleeve 30 is located between the first stepped surface 21 and the end surface of the first end of the cylinder body 10 . Preferably, a first gasket 23 is further provided between the expansion sleeve 30 and the end surface of the cylinder body 10 . In this way, as shown in Figure 1, when the handle 40 is not operated, the part of the mandrel 20 protruding from the cylinder body 10 and the expansion sleeve 30 can freely extend into the light hole 101 of the part 100 to be tested, as shown in Figure 2, to be After the expansion sleeve 30 is inserted into the light hole 101, the handle 40 is operated. When the mandrel 20 moves to the second end of the cylinder body 10 under the action of the handle 40, the first step surface 21 approaches the end surface to push against the expansion sleeve 30, and the expansion sleeve 30 is pushed against the expansion sleeve 30. The sleeve 30 is compressed in the axial direction, and expands in the radial direction so as to be tightened in the optical hole 101 , and then achieve a sealed connection with the part 100 to be tested.

The utility model utilizes the characteristics of the elastic expansion of the expansion sleeve 30 to realize the sealing connection with the light hole 101 of the part 100 to be tested. The connection method is clever, the structure is simple, the operation is convenient, and the sealing performance is good.

There are many structures and connection methods of the handle 40 that can drive the axial movement of the mandrel 20. In a preferred embodiment of the present utility model, the handle 40 has an active part and a handle connected with the active part, and the active part pivots Connected to the second end of the cylinder body 10, and the active part has different distances from the pivot center and outer edges abutting against the end of the cylinder body 10. When the handle 40 rotates, different outer edges abut against the end to drive The mandrel 20 moves axially.

In a preferred embodiment of the present utility model, the quick connector also includes an end cap 50 threadedly connected to the second end of the cylinder body 10, the active part of the handle 40 abuts on the end cap 50, and the end cap 50 is pushed by rotation. The handle 40 moves in the axial direction of the cylinder body 10, and the handle 40 drives the mandrel 20 to move in the axial direction of the cylinder body 10, thereby adjusting the distance between the first stepped surface 21 and the end surface of the second end of the cylinder body 10, Finally, the outer diameter of the expansion sleeve 30 is changed within a certain size range. The advantage of this structure is that before the handle 40 is operated, the outer diameter of the expansion sleeve 30 can be adjusted by rotating the end cap 50, so that the expansion sleeve 30 can be inserted into light holes 101 of various size series, thereby increasing the use range of the quick connector.

In a preferred embodiment of the present utility model, the quick connector also includes a piston 60 arranged in the cylinder body 10, the mandrel 20 is threadedly connected with the cylinder body 10 and is coaxial with the piston 60, and the piston 60 is connected to the handle 40 through the pull rod 70 In this way, the handle 40 drives the piston 60 and the mandrel 20 to move axially through the pull rod 70 . Preferably, the handle 40 is integrally formed with the piston 60 , and the handle 40 is pivotally connected to the end of the pull rod 70 .

In a preferred embodiment of the present utility model, the gas filling hole 11 is set on the cylinder body of the cylinder body 10 along the radial direction of the cylinder body 10, and the gas chamber 12 communicating with the gas charging hole 11 is formed in the cylinder body 10, and the mandrel The interior of 20 is provided with an air guide hole 22 along its axial direction, one end communicating with the gas chamber 12 and the other end communicating with the light hole 101. cavity, and the two ends of the annular cavity are formed by the end face of the piston 60 toward the first end of the cylinder body 10 and the second stepped surface 13 formed in the cylinder body 10 and opposite to the end face toward the first end of the cylinder body 10 limited. The quick connector of the present utility model has the benefit of the annular cavity: on the one hand, the pressure gas entering the annular cavity enters the optical hole 101 through the air guide hole 22 to inflate the part 100 to be tested; on the other hand, the pressure gas pushes against The piston 60 also drives the mandrel 20 to move toward the second end of the cylinder body 10 , thereby further increasing the degree of expansion of the expansion sleeve 30 in the light hole 101 .

In order to make the mandrel 20 reset automatically after the quick connector of the present utility model is removed from the part 100 to be tested, two ends are respectively provided with the end face and the second For the spring 90 abutting against the second stepped surface 13 , preferably, a second washer 14 is provided between the spring 90 and the second stepped surface 13 . The spring 90 is in a compressed state when the quick connector is sealingly connected to the part 100 to be tested, and when the quick connector is removed from the part 100 to be tested, the spring 90 returns elastically to drive the mandrel 20 to reset.

In order to prevent the pressure gas in the annular cavity from flowing out from the gap between the mandrel 20 and the cylinder 10 and between the piston 60 and the cylinder 10, between the mandrel 20 and the cylinder 10, the piston 60 and the cylinder 10 Sealing rings 80 are arranged between them.

The above embodiments are only exemplary embodiments of the utility model, and are not used to limit the utility model, and the protection scope of the utility model is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements to the utility model within the spirit and protection scope of the utility model, and such modifications or equivalent replacements should also be deemed to fall within the protection scope of the utility model.

Claims (9)

1. a quick connector, is connected on the unthreaded hole of part to be measured, it is characterised in that including:

Cylinder body, it has and connects the air-filled pore to inflate to described unthreaded hole with described unthreaded hole；

Mandrel, it is arranged in described cylinder body, and stretches out from the first end of described cylinder body；

Expansion set, it is made up of elastomeric material, and described expansion set is set on the described mandrel stretching out described cylinder body；

Handle, is arranged on the second end of described cylinder body, for driving axial at described cylinder body of described mandrel Upper movement；Wherein:

Described mandrel stretches out one end of described cylinder body, and to be formed with the end face of the first end with described cylinder body relative First terrace, described expansion set between the end face and described First terrace of the first end of described cylinder body, With when described mandrel moves to the second end of described cylinder body, described First terrace push against described expansion set with Described expansion set external diameter is made to become big.

Quick connector the most according to claim 1, it is characterised in that described handle is articulated in institute State the second end of cylinder body, and moved by mandrel described in pivot driver.

Quick connector the most according to claim 2, it is characterised in that also include being threadedly connected to The end cap of the second end of described cylinder body, described handle is connected on described end cap, and described end cap is by rotating Push against described handle to move up at the axle of described cylinder body with the described mandrel of drive, thus regulate described first Distance between the end face of the second end of step surface and described cylinder body, so that the external diameter change of described expansion set.

Quick connector the most according to claim 1, it is characterised in that also include being arranged on described Piston in cylinder body and the pull bar being connected with described piston, described mandrel is connected with described piston, described Pull bar and described handle pivot joint.

Quick connector the most according to claim 4, it is characterised in that described air-filled pore is radially opened It is located at the cylinder of described cylinder body, in described cylinder body, forms the gas cavity volume connected with described air-filled pore, institute State and offer one end inside mandrel and connect with described gas cavity volume, the inducing QI that the other end connects with described unthreaded hole Hole.

Quick connector the most according to claim 5, it is characterised in that described gas cavity volume is served as reasons The ring-shaped chamber that described cylinder body and described mandrel surround, and the two ends of described ring-shaped chamber are by described piston court To the end face of the first end of described cylinder body and in being formed at cylinder body and with the end of the first end towards described cylinder body The second step face restriction that face is relative.

Quick connector the most according to claim 6, it is characterised in that in described gas cavity volume also It is provided with the bullet that two ends abut respectively with the end face of the first end towards described cylinder body and described second step face Spring.

Quick connector the most according to claim 5, it is characterised in that described mandrel and described cylinder Between body, between described piston and described cylinder body, it is provided with sealing ring.

Quick connector the most according to claim 4, it is characterised in that described pull bar and described work Fill in one-body molded.