CN112413262A

CN112413262A - Detachable quick connector capable of being unlocked in rotating mode

Info

Publication number: CN112413262A
Application number: CN202011419617.9A
Authority: CN
Inventors: 张辉明; 王杏娟
Original assignee: Linhai Yongsheng Auto Technology Co ltd
Current assignee: Linhai Yongsheng Auto Technology Co ltd
Priority date: 2020-12-06
Filing date: 2020-12-06
Publication date: 2021-02-26

Abstract

A rotationally unlocked removable quick connector comprising: a male fitting having an annular flange; a female fitting into which the male fitting is inserted and which is sealingly releasably connected to the female fitting; the female fitting is provided with a housing and a self-lock for cooperating with the annular flange to limit the range of movement of the male fitting; the self-locker includes: the elastic body is provided with a pair of limiting bulges, and the limiting bulges are provided with sliding surfaces; the outer surface of the shell is provided with an annular groove for accommodating the elastic main body and a jack corresponding to the limiting protrusion, the jack is provided with a guide surface corresponding to the sliding surface, the guide surface is used for blocking the sliding surface when the elastic main body rotates and is matched with the sliding surface, so that the limiting protrusion moves back to the center of the female connector, and the elastic main body is used for keeping the limiting protrusion to block the limiting protrusion.

Description

Detachable quick connector capable of being unlocked in rotating mode

Technical Field

The invention relates to the field of connectors, in particular to a detachable quick connector capable of being unlocked in a rotating mode.

Background

The detachable quick connector is also a fuel pipeline quick connector in the American standard SAE J2044-2009 fuel pipeline quick connector, and is also commonly applied to urea pipes, water pipes and air pipes in the automobile industry. Mainly comprises a male connector and a female connector, which are also commonly called male connector and female connector.

Patent publication CN 1916474a discloses a releasable plug-in connector for inserting a tubular insert having a peripheral flange. The male connector comprises a cylindrical insert chamber housing which receives a male connector-like insert and a separate locking ring made of a hard/resilient plastic. The locking edges of the ring are inwardly directed and arc-shaped, which are pushed apart when the insert is pushed into the joint, and then spring back when the insert is pushed into and locks the components in the joint, and engage behind the ribs. The distal ends of the locking rib edges are interconnected by a pair of V-shaped resilient arms that are accessible from outside the connector housing to urge them to the unlocked position to remove the insert from the connector.

Patent publication No. CN 1751202a discloses a dust cover for a quick connector and a quick connector, in which a retainer cannot be locked unless the dust cover is inserted. When the dust cover body is inserted into the housing of the high-speed connector, the O-ring is fitted onto the O-ring protector, and the stopper is restricted by the interference portion to a position where the stopper cannot be locked.

The self-locker of the conventional quick connector is disposed inside the female connector in terms of structure, and thus a portion of the housing corresponding to the self-locker needs to be large in size.

In the production aspect, a cavity for accommodating the self-locking device needs to be provided with a blocking part for preventing the button from being pulled out, so that an inner core is required to be arranged on the core pulling of the injection mold, the structure is complex, and the manufacturing cost is high.

In the aspect of use, most of the existing self-locking devices are in the form of buttons or bolts, and when the pressing direction or the pulling direction of the bolts is fixed, manufacturers need to strictly control the orientation of the buttons and the bolts so as to facilitate the operation of users during maintenance.

Disclosure of Invention

The invention aims to provide a detachable quick connector capable of being unlocked in a rotating mode.

To achieve the above advantages, the present invention provides a detachable quick connector that is unlocked by rotation, comprising: a male fitting having an annular flange; a female fitting into which the male fitting is inserted and which is sealingly releasably connected to the female fitting; the female fitting is provided with a housing and a self-lock for cooperating with the annular flange to limit the range of movement of the male fitting; the self-locker includes: the elastic body is provided with a pair of limiting bulges, and the limiting bulges are provided with sliding surfaces; the outer surface of the shell is provided with an annular groove for accommodating the elastic main body and a jack corresponding to the limiting protrusion, the jack is provided with a guide surface corresponding to the sliding surface, the guide surface is used for blocking the sliding surface when the elastic main body rotates and is matched with the sliding surface, so that the limiting protrusion moves back to the center of the female connector, and the elastic main body is used for keeping the limiting protrusion to block the limiting protrusion.

In an embodiment of the invention, one surface of the limiting protrusion close to the socket is provided with an anti-pulling protrusion, a movable gap allowing the self-locker to move along the pulling direction of the male connector is arranged between the limiting protrusion and the socket and between the annular groove and the elastic main body, and the female connector is provided with a blocking part corresponding to the anti-pulling protrusion, and the blocking part is used for blocking the anti-pulling protrusion after the male connector moves back to the shell to press the limiting protrusion.

In one embodiment of the invention, the sliding surface is a bevel or a cambered surface.

In one embodiment of the invention, the outer surface of the elastic body is provided with a torsion part.

In one embodiment of the invention, the torsion portion is a block-shaped structure, and the torsion portion is located at one or two free end ends of the elastic body.

In one embodiment of the present invention, the twisted portion has a pattern structure.

In one embodiment of the invention, an inner O-ring, a spacer ring, an outer O-ring and an outer retainer ring are arranged in the female connector, the outer retainer ring is provided with a pair of elastic buckles, the shell is provided with a through hole which is positioned beside the jack and is used for matching the elastic buckles in the annular groove, and the elastic body covers the through hole.

In one embodiment of the invention, the arc of the resilient body covering the annular groove is greater than 270 degrees.

In one embodiment of the invention, the jack is symmetrical about the housing center point.

In one embodiment of the invention, the male connector and/or the housing and/or the self-locker are made of glass fiber modified nylon.

In the invention, the self-locking device is provided with a ring-shaped expandable elastic main body with a notch, the inner side of the elastic main body is provided with a pair of limiting bulges, and the limiting bulges are provided with sliding surfaces; the outer surface of the shell is provided with an annular groove for accommodating the elastic main body and a jack corresponding to the limiting protrusion, the jack is provided with a guide surface corresponding to the sliding surface, the guide surface is used for blocking the sliding surface when the elastic main body rotates and is matched with the sliding surface, so that the limiting protrusion moves back to the center of the female connector, and the elastic main body is used for keeping the limiting protrusion to block the limiting protrusion. The shell size is little in the aspect of the structure, and shell inner structure is simple, and the back-off is few, and the deviation of allowing of self-locker during the installation is big, and the self-locker can realize the unblock through rotatory, and the rotatory self-locker of user is convenient.

Drawings

Fig. 1 is a schematic structural view showing a detachable quick connector unlocked by rotation according to a first embodiment of the present invention.

Fig. 2 is an exploded view of the rotationally unlocked removable quick connector of fig. 1.

FIG. 3 is a schematic view of the self-locker of the rotary unlocked removable quick connector of FIG. 2.

Fig. 4 is a schematic structural view of the locker of fig. 3 in another direction.

FIG. 5 is a schematic view of the housing of the rotary unlocked removable quick connector of FIG. 2.

FIG. 6 is an axial cross-sectional view of the rotationally unlocked removable quick connector of FIG. 1.

FIG. 7 is a radial cross-sectional view of the rotationally unlocked removable quick connector of FIG. 1.

Fig. 8 is a schematic structural view showing a female coupling of a detachable quick connector unlocked by rotation according to a second embodiment of the present invention.

Detailed Description

To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be provided with reference to the accompanying drawings and preferred embodiments for describing specific embodiments, structures, features and effects thereof.

Referring to fig. 1 and 2, a detachable quick connector capable of being unlocked by rotation according to a first embodiment of the present invention includes: the male joint 1 and the female joint 2 are arranged, the male joint 1 is inserted into the female joint 2, and the male joint 1 is hermetically and detachably connected with the female joint 2; the male part 11 is a standard part of standard SAE2044-2009, the male part 11 comprising a plug 11a (also known as a male end) for insertion into the female part and a stem 11b for connection to a pipe, the rear end of the plug being provided with an annular flange 11 c. The annular flange 11c is used to lock the male connector 11 in cooperation with the self-locker 19 to prevent the plug 11a from slipping out of the female connector 13. The female connector 2 is provided with a housing 21 and a self-locker 22 for cooperating with the annular flange 11c to limit the moving range of the male connector 1.

The female joint 2 is internally provided with an inner O-ring 23, a spacer ring 24, an outer O-ring 25 and an outer retainer ring 26. The male connector 1 and/or the shell 21 and/or the self-locking device 22 are made of glass fiber modified nylon.

Referring to fig. 2, 3 and 4, the self-locking device 22 includes: the elastic body 221 is a ring-shaped expandable elastic body with a notch 221a, a pair of limiting protrusions 222 are arranged on the inner side of the elastic body 221, and the limiting protrusions 222 are provided with sliding surfaces 222 a. Referring to fig. 6 and 7, one surface of the limiting protrusion 222 facing the socket 200 is provided with an insertion guide surface 222c corresponding to the annular flange 11c, and the other surface facing away from the socket 200 is provided with a blocking surface 222d perpendicular to the axis O' of the plug 11 a.

The surface of the limit protrusion 222 close to the socket 200 of the female connector 2 for receiving the male connector 1 is provided with an anti-pulling protrusion 222b, a movable gap 300 allowing the self-locking device 22 to move along the pulling direction of the male connector 1 is provided between the limit protrusion 222 and the insertion hole 2100 and between the annular groove 210 and the elastic body 221, the inner wall of the female connector 2 is provided with a blocking portion 210b corresponding to the anti-pulling protrusion 222b, and the blocking portion 210b is used for blocking the anti-pulling protrusion 222b when the limit protrusion 222 is pressed to correspond to the blocking portion 210b after the male connector 1 moves away from the housing and presses the limit protrusion 222, so as to prevent the limit protrusion 222 from moving away from the housing center O', so that the anti-pulling capacity after the male connector and the female connector are connected, namely, the required pulling-off force (SAE 2044).

The sliding surface 222a may be a slant surface or a curved surface, and the specific inclination and curvature need to be determined according to whether the torque required by the torsion elastic body 221 is appropriate or not.

The user can twist the elastic body 221 to unlock the lock body without the twisting portion 223, that is, the outer surface of the elastic body 221 is smooth, but in order to facilitate the user to twist the elastic body 221, the twisting portion 223 is disposed on the outer surface of the elastic body 221. The torsion portion 223 is preferably a triangular block-shaped structure, the torsion portion has a pressing surface convenient for a user to press, the torsion portion 223 is located at one free end of the elastic body 221, of course, the torsion portion 223 can achieve the technical effect of facilitating the user to twist by arranging one free end of the elastic body of the torsion portion 223 or arranging the middle part of the outer surface of the elastic body 221, and in other embodiments, the torsion portion 223 is a pattern structure.

The arc of the elastic body 221 covering the annular groove 210 is greater than 270 degrees. This is to prevent the elastic body 221 from wrapping the annular groove larger than 180 degrees after the locker 22 is unlocked, so as to prevent the locker 22 from being completely separated from the housing 21.

Referring to fig. 5, the outer retainer 26 is provided with a pair of elastic buckles 261, and the housing 21 is provided with a through hole 2100 'for engaging the elastic buckle 261 and located beside the insertion hole 2100 in the annular groove 210, and the elastic body 221 covers the through hole 2100'. This reduces the ingress of dust into the housing 21. The receptacle 2100 is point-symmetric about the center of the housing 21, i.e., the annular groove center O'. The outer surface of the housing 21 is provided with an annular groove 210 for receiving the elastic body 221 and a receptacle 2100 corresponding to the stopper protrusion 222. Referring to fig. 6, the sidewall of the insertion hole 2100 is provided with a guide surface 210a corresponding to the sliding surface 222a, the guide surface 210a is used for blocking the sliding surface 222a and cooperating with the sliding surface 222a when the elastic body 221 rotates, so that the limiting protrusion 222 moves away from the center of the female connector 2, i.e., the center O' of the annular groove, and the elastic body 221 is used for keeping the limiting protrusion 222 blocking the limiting protrusion 222.

Referring to fig. 8, in the present embodiment, a heating wire fixing portion 28 for accommodating a heating wire is disposed outside the housing 21, and the heating wire fixing portion 28 is a spiral groove or a protrusion.

Please refer to fig. 6 and 7, the operation principle of the rotary unlocking detachable quick connector of this patent is as follows:

the male connector is inserted into the female connector from the socket, the annular flange contacts the insertion guide surface of the limiting protrusion to enable the pair of limiting protrusions to move back to the center of the shell until the annular protrusion reaches the rear of the limiting protrusion, the limiting protrusion which is not resisted under the elastic action of the elastic main body rapidly moves towards the center of the shell, and the blocking surface reaches the position of the blocking annular protrusion.

Under the condition that a user does not unlock, when the pipeline is pulled, the annular flange extrudes the blocking surface until the position of the anti-pulling bulge corresponds to the blocking part, and the blocking part can block the anti-pulling bulge from moving back to the central direction of the shell.

When the user operates the unlocking, the elastic main body is pressed or directly rotated, and the limiting bulge moves back to the center of the shell when the sliding surface is matched with the guide surface, so that the user can easily separate the male connector and the female connector.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A rotationally unlocked removable quick connector comprising: a male fitting having an annular flange; a female fitting into which the male fitting is inserted and which is sealingly releasably connected to the female fitting; the female fitting is provided with a housing and a self-lock for cooperating with the annular flange to limit the range of movement of the male fitting; the method is characterized in that:

the self-locker includes: the elastic body is provided with a pair of limiting bulges, and the limiting bulges are provided with sliding surfaces; the outer surface of the shell is provided with an annular groove for accommodating the elastic main body and a jack corresponding to the limiting protrusion, the jack is provided with a guide surface corresponding to the sliding surface, the guide surface is used for blocking the sliding surface when the elastic main body rotates and is matched with the sliding surface, so that the limiting protrusion moves back to the center of the female connector, and the elastic main body is used for keeping the limiting protrusion to block the limiting protrusion.

2. The rotationally unlocked removable quick connector according to claim 1, wherein: the anti-pulling device is characterized in that an anti-pulling bulge is arranged on one side, close to the socket, of the limiting bulge, movable gaps allowing the self-locking device to move along the pulling direction of the male connector are formed between the limiting bulge and the socket and between the annular groove and the elastic main body, the female connector is provided with a blocking portion corresponding to the anti-pulling bulge, and the blocking portion is used for blocking the anti-pulling bulge after the male connector moves and extrudes the limiting bulge back to the shell.

3. The rotationally unlocked removable quick connector according to claim 1, wherein: the sliding surface is an inclined surface or an arc surface.

4. The rotationally unlocked removable quick connector according to claim 1, wherein: the outer surface of the elastic main body is provided with a twisting part.

5. The rotationally unlocked removable quick connector according to claim 1, wherein: the torsion part is of a block-shaped structure and is positioned at one or two free end parts of the elastic main body.

6. The rotationally unlocked removable quick connector according to claim 1, wherein: the torsion part is of a pattern structure.

7. The rotationally unlocked removable quick connector according to claim 1, wherein: an inner O ring, a separation ring, an outer O ring and an outer retaining ring are arranged in the female joint, a pair of elastic buckles are arranged on the outer retaining ring, a through hole which is positioned beside the jack and used for being matched with the elastic buckles is arranged in the annular groove of the shell, and the elastic main body covers the through hole.

8. The rotationally unlocked removable quick connector according to claim 1, wherein: the radian of the elastic main body covering the annular groove is larger than 270 degrees.

9. The rotationally unlocked removable quick connector according to claim 1, wherein: the jack is symmetrical about the housing center point.

10. The rotationally unlocked removable quick connector according to any one of claims 1 to 9, wherein: the male joint and/or the shell and/or the self-locking device are made of glass fiber modified nylon.