CN109973487A - a quick connector - Google Patents

Abstract

The present invention is a quick connector, comprising a connecting body and a sleeve sleeved on the connecting body. The connecting body includes a cylindrical connecting head with an inserting hole, and the inserting hole is used for inserting and setting with an external component. Two installation holes for installing steel balls are symmetrically arranged on the side wall, the installation holes are connected with the insertion holes, the lower end of the connecting head is provided with a spring step, and the inner wall of the sleeve is sequentially provided with a first step surface, a convex The ribs and the second step surface form a spring installation cavity between the raised ribs and the spring step, the spring is sleeved on the outer wall of the connecting head in the spring installation cavity, and the second step surface is located below the spring step. The invention realizes quicker and more convenient assembly with the steel ball by arranging circular mounting holes, and reduces friction and noise at the same time. The use of the sleeve and the connecting body in cooperation can reduce the number of parts, improve the disassembly and assembly efficiency, and reduce production. cost.

Description

a quick connector

technical field

The invention belongs to the technical field of mechanical parts, and in particular relates to a quick joint used for connection between parts of a shaft sleeve.

Background technique

When some mechanical equipment is used, it is often necessary to assemble and disassemble the equipment. For example, it can be used in a pick-up device with a mirror. When the upper mirror is combined with the lower extension rod, in the two-part structure of the combination, the existing two parts are often engaged by a snap-fit structure and fixed by bolts, or by using The two-part structure is installed by screw locking. However, for equipment that needs to be disassembled frequently for replacement or inspection, when the equipment is assembled using a snap-fit structure or threaded locking, the assembly and disassembly procedures are complicated, and additional screws or bolts need to be preserved during disassembly, which seriously affects disassembly. Install efficiency.

Contents of the invention

In view of the problems existing in the prior art, the purpose of the design of the present invention is to provide a quick connector to reduce the number of parts, reduce the production cost, and improve the disassembly efficiency at the same time, which can be used for common parts in various equipment.

The present invention is achieved through the following technical solutions:

The quick connector is characterized in that it includes a connecting body and a sleeve that is sleeved on the connecting body, and the connecting body includes a cylindrical connecting head with an insertion hole for connecting with an external Two mounting holes for installing steel balls are symmetrically arranged on the side wall of the connecting head, the mounting holes are communicated with the inserting holes, the lower end of the connecting head is provided with a spring step, and the sleeve The inner wall is sequentially provided with a first stepped surface, a convex rib and a second stepped surface from top to bottom, a spring installation cavity is formed between the convex rib and the spring step, and the spring is sleeved and arranged on the outer wall of the connecting head located in the spring installation cavity , the second step surface is located below the spring step.

The quick joint is characterized in that the distance from the first step surface to the top of the sleeve forms a first adjustment hole, the distance between the convex rib and the first step surface forms a second adjustment hole, and the second The distance from the step surface to the bottom end of the sleeve forms a limiting hole.

The quick connector is characterized in that the diameter of the mounting hole is smaller than the diameter of the steel ball. In normal state, the arc-shaped outer surface of the steel ball extending into the mounting hole protrudes from the plane where the mounting hole is located. The arc surface on the other side is in conflict with the inner wall of the second adjusting hole.

The above-mentioned quick joint is characterized in that the lower end of the connector is also provided with a circlip groove, and a circlip is arranged in the circlip groove, and the distance from the installation hole to the top of the connector is the same as the second The distance from the lower surface of the step surface to the upper surface of the circlip is equal.

The above-mentioned quick joint is characterized in that when the first adjustment hole slides down to the position of the steel ball, one end of the steel ball makes point contact with the inner wall of the first adjustment hole, and the other end of the steel ball is located in the installation hole but does not protrude into the insertion hole. inner wall of the hole.

The quick connector is characterized in that the inner wall of the protruding rib matches the outer wall of the connecting head.

The quick connector described above is characterized in that the mounting hole is a circular hole.

The invention realizes quicker and more convenient assembly with the steel ball by providing a circular mounting hole, and at the same time reduces friction and noise. The joint use of the sleeve and the connecting body reduces the number of parts while improving disassembly efficiency and reducing production. cost.

Description of drawings

Fig. 1 is the assembly drawing when the present invention works normally;

Fig. 2 is the schematic diagram of the limit position when replacing the external parts of the present invention;

Fig. 3 is the structural representation of the connector of the present invention;

Fig. 4 is the sectional structure schematic diagram of sleeve of the present invention;

In the figure, 1-connecting body, 2-sleeve, 3-insertion hole, 4-connecting head, 5-external part, 6-steel ball, 7-installation hole, 8-spring step, 9-first step surface , 10-rib, 11-second step surface, 12-spring installation cavity, 13-spring, 14-first adjustment hole, 15-second adjustment hole, 16-limit hole, 17-retention groove, 18 - circlip.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings, and specific implementation methods will be given.

As shown in Figure 1-2, a quick connector of the present invention includes a connecting body, a sleeve, a spring, a retainer, and a steel ball. A cylindrical connector with a socket hole, which is used to connect with an external connector. Two circular mounting holes for installing steel balls are symmetrically arranged on the side wall of the connector. The mounting holes and the socket holes Connected, the choice of circular mounting holes is due to the wide range of access to the matching steel balls and low cost. Choosing a round hole is more cost-effective than other polygonal holes. The assembly of the round hole is also faster and more convenient than other holes. Replacement During the process of connecting the external parts, the steel ball and the sleeve are in point contact, with low friction, low noise, high precision, long service life, and not easy to fall off.

As shown in Figure 3-4, the lower end of the connector is provided with a spring step, which is used to support the spring and prevent the spring from falling off. The inner wall of the sleeve is provided with a first step surface, a convex rib, and a second step surface from top to bottom. , the inner wall of the convex rib coincides with the outer wall of the connector, the spring installation cavity is formed between the convex rib and the spring step, the spring socket is arranged on the outer wall of the connector in the spring installation cavity, and the spring step must be higher than the second step If it is equal to or lower than the second step surface, the corner of the second step surface will collide with the spring and the spring step, causing wear. The distance between the first step surface and the top end of the sleeve forms a first adjustment hole, the distance between the convex rib and the first step surface forms a second adjustment hole, and the distance between the second step surface and the bottom end of the sleeve forms a limit hole.

Further, the diameter of the mounting hole must be smaller than the diameter of the steel ball. Otherwise, once more than half of the ball is stuck in the mounting hole, it cannot be ejected. If the mounting hole is too large, the steel ball may even fall into the insertion hole, resulting in the failure of the external parts. Install. In normal state, the arc-shaped outer surface of the steel ball extending into the installation hole protrudes from the plane where the installation hole is located, and the arc-shaped surface on the other side of the steel ball collides with the inner wall of the second adjustment hole; the setting of the installation hole position, the installation The distance from the hole to the top of the connector is equal to the distance from the lower surface of the second step surface to the upper surface of the circlip. If the distance between the mounting hole and the upper end of the connector is too small, the sphere will easily fall off when replacing the external parts. If the distance is too large, the external parts are easy to loosen, which affects the use effect. The lower end of the connecting head is also provided with a snap-ring groove, and a snap-ring is arranged in the snap-ring groove. The setting of the snap-ring groove limits the limit position when replacing the external parts and prevents the steel ball from falling off.

Furthermore, when the first adjustment hole slides down to the position of the steel ball, one end of the steel ball makes point contact with the inner wall of the first adjustment hole, and the other end of the steel ball is located in the installation hole but does not protrude from the inner wall of the insertion hole. The diameter of the first adjustment hole is too small. When replacing the external connection, limit the outward extreme position of the steel ball. If the steel ball cannot be ejected, enough space cannot be reserved for the external connection, which will affect the replacement of the external connection. The diameter of the first adjustment hole is too large, and there is no constraint on the limit position of the steel ball, which will cause the steel ball to fall off when the external connection is replaced. The function of the second adjustment hole is to exert a certain force on the steel ball when the quick joint is in normal operation, so that the outer connecting piece and the connecting body are closely matched. Therefore, there are certain requirements on the size. If the size is too small, the steel ball cannot be installed. If the size is too large, the steel ball will easily fall off. The protruding rib supports the steel ball under normal working conditions and limits the limit position of the connecting body; the second step surface limits the limit position of the circlip; the function of the limiting hole facilitates the circlip to be inserted into the circlip groove in the connecting body.

When installing the quick connector of the present invention, first put the spring on the tail of the connector, then put it into the sleeve, then press the spring to the minimum limit position, completely expose the installation hole on the connector, put the steel ball into it, and then restore the spring To the relaxed state, finally put the circlip into the circlip groove in the connecting body to complete the installation of the quick connector, which is convenient and quick.

When the quick connector replaces the external parts, the sleeve is pulled down, and the upper end of the connector is exposed. The steel ball enters the position of the second adjustment hole from the compressed state of the first adjustment hole, and the steel ball moves outward to clear the inner space of the insertion hole. part into the interior of the receptacle. Release the sleeve, and under the action of the spring, the sleeve returns to the normal working position. At this time, the steel ball exerts a radial force on the external body under the action of the external force of the second adjustment hole, and the steel ball closely fits with the groove on the external body, thereby realizing the fixing of the external body.

Claims (7)

1. A quick connector, characterized by comprising a connecting body (1) and a sleeve (2) sleeved on the connecting body (1), the connecting body (1) comprising a A cylindrical connecting head (4), the insertion hole (3) is used for inserting and setting with the external component (5), and two steel balls (6) for installing steel balls (6) are symmetrically arranged on the side wall of the connecting head (4). The mounting hole (7) is connected to the insertion hole (3), the lower end of the connecting head (4) is provided with a spring step (8), and the inner wall of the sleeve (2) is from the top A first stepped surface (9), a convex rib (10), and a second stepped surface (11) are arranged in sequence from the bottom, and a spring installation cavity (12) is formed between the convex rib (10) and the spring step (8), The spring (13) is sleeved and arranged on the outer wall of the connecting head (4) in the spring installation cavity (12), and the second step surface (11) is located below the spring step (8). 2. A quick connector according to claim 1, characterized in that the distance between the first step surface (9) and the top end of the sleeve (2) forms a first adjustment hole (14), and the rib (10) ) to the first step surface (9) to form a second adjustment hole (15), and the distance from the second step surface (11) to the bottom end of the sleeve (2) to form a limit hole (16). 3. A quick connector according to claim 1, characterized in that the diameter of the mounting hole (7) is smaller than the diameter of the steel ball (6), and in normal state, the steel ball extending into the mounting hole (7) (6) Its arc-shaped outer surface protrudes from the plane where the installation hole (7) is located, and the arc-shaped surface on the other side of the steel ball (6) collides with the inner wall of the second adjustment hole (15). 4. A quick connector according to claim 1, characterized in that the lower end of the connecting head (4) is also provided with a snap ring groove (17), and the clip ring slot (17) is provided with a clip For the spring (18), the distance from the installation hole (7) to the top end of the connector (4) is equal to the distance from the lower surface of the second step surface (11) to the upper surface of the circlip (18). 5. A quick connector according to claim 2, characterized in that when the first adjustment hole (14) slides down to the position of the steel ball (6), one end of the steel ball (6) is in contact with the first adjustment hole (14). ) is in point contact with the inner wall, and the other end of the steel ball (6) is located in the mounting hole (7) but does not protrude from the inner wall of the insertion hole (3). 6. A quick connector according to claim 1, characterized in that the inner wall of the protruding rib (10) matches the outer wall of the connecting head (4). 7. A quick connector according to claim 1, characterized in that the mounting hole (7) is a circular hole.