CN215334425U - Claw type inner expansion cylinder quick connector - Google Patents

Abstract

The utility model provides a jaw type internal expansion cylinder quick connector, which comprises: the core shaft, at least two clamping jaws, the spacer bush, the plugging rubber ring and the rubber ring pushing assembly are used for extruding the plugging rubber ring to enable the outer diameter of the plugging rubber ring to be gradually enlarged until the inner hole of the workpiece is filled to plug the inner hole, and quick sealing connection is achieved. The claw type internal expansion cylinder quick connector provided by the utility model extrudes the plugging rubber ring through the rubber ring pushing assembly, the outer diameter of the plugging rubber ring is increased to fill the inner hole of the workpiece, the claw type internal expansion cylinder quick connector is suitable for inner holes with various shapes, the interaction force between the plugging rubber ring and the workpiece is kept stable, the sealing effect is enhanced, a plurality of claws can be spread, the claws are abutted against the inner hole of the workpiece, the auxiliary supporting effect is realized, and the air leakage caused by the movement of the plugging rubber ring due to the overlarge inner hole is prevented.

Description

Claw type inner expansion cylinder quick connector

Technical Field

The utility model belongs to the field of connector equipment, and particularly relates to a jaw type internal expansion cylinder quick connector.

Background

When positive negative pressure test fluid is filled or tested to the work piece, the hole on the work piece needs to be sealed, usually the connector is used, and the existing connector is mostly regular in shape and has certain limitation, and when an irregular hole is sealed, the sealing effect is poor, and the test result is influenced.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a quick connector for a claw-type internal expansion cylinder, so as to improve the applicability and enhance the sealing effect.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a jaw-type internal expansion cylinder quick connector comprising:

the front end of the mandrel is detachably connected with a front end lock nut, and the front end lock nut is provided with a conical table which is thick in front and thin in back;

the clamping device comprises at least two clamping jaws, wherein the clamping jaws can enclose a clamping sleeve with a through inner hole, the clamping sleeve is enclosed on a conical table and is in sliding connection with the conical table, a limiting table is arranged on a front-end lock nut, and the limiting table limits the movement stroke of the clamping jaws by abutting against the clamping jaws;

the spacer bush is connected to the mandrel in a sliding manner and abuts against the rear end of the clamping sleeve;

the plugging rubber ring is connected to the mandrel in a sliding manner and abuts against the rear end of the spacer sleeve;

the rubber ring pushing assembly abuts against the rear end of the plugging rubber ring, and the outer diameter of the plugging rubber ring is increased by extruding the plugging rubber ring.

Preferably, the rubber ring pushing assembly comprises:

the rear connecting seat is detachably and hermetically connected with the rear end of the mandrel, and an air hole is formed in the rear connecting seat;

the rubber ring pushing sleeve is connected to the mandrel in a sliding mode and abuts against the rear end of the plugging rubber ring;

the rear end of the outer sleeve is detachably and hermetically connected with the rear connecting seat;

the piston, piston seal sliding connection in on the dabber, the outer wall and the sealed sliding connection of overcoat inner wall of piston, open at the overcoat middle part has the hole, the hole that the rubber ring promoted the cover and passed the overcoat middle part offsets with the piston, the maximum stroke that piston and rubber ring promoted the cover all is greater than the maximum stroke of jack catch.

Preferably, be equipped with the ladder platform on the dabber, the diameter of ladder platform is greater than the diameter of dabber and piston junction, is equipped with the answer spring between the ladder platform of dabber and the piston, and the answer spring housing is located the spindle, the both ends of answer spring offset with the ladder platform and the piston of dabber respectively, be equipped with on the piston with answer spring rear end complex ring channel.

Preferably, one side of the piston, which abuts against the rubber ring pushing sleeve, is provided with a positioning boss, the rubber ring pushing sleeve is provided with an inner hole, and the positioning boss is inserted into the inner hole on the rubber ring pushing sleeve.

Preferably, the front end of the rear connecting seat is provided with a guide ring groove, the rear end of the piston is provided with a guide sleeve, and the maximum length of the guide sleeve on the piston inserted into the guide ring groove of the rear connecting seat is larger than the maximum stroke of the piston in the axial reciprocating motion process of the piston.

Preferably, a first annular groove is formed in the contact surface of the piston and the outer sleeve, a first sealing ring is matched in the first annular groove, a second annular groove is formed in the contact surface of the piston and the mandrel, and a second sealing ring is matched in the second annular groove.

Preferably, a third annular groove is formed in the contact surface of the outer sleeve and the rear connecting seat, and a third sealing ring is matched in the third annular groove.

Preferably, a fourth annular groove is formed in the contact surface of the rear connecting seat and the mandrel, and a fourth sealing ring is matched in the fourth annular groove.

Preferably, an annular gap is formed between the front end lock nut and the core shaft, an inner flange is arranged in the spacer sleeve, the inner flange of the spacer sleeve is inserted into the annular gap, a blocking spring is arranged in the annular gap, the blocking spring is sleeved on the core shaft, and two ends of the blocking spring respectively abut against the inner flanges of the front end lock nut and the spacer sleeve.

Preferably, the outer ring cover of jack catch is equipped with a plurality of extension springs, the extension spring is located the ring channel that the jack catch outer end was seted up.

Compared with the prior art, the quick connector of the clamping jaw type internal expansion cylinder has the following advantages:

(1) the claw type internal expansion cylinder quick connector extrudes the plugging rubber ring through the rubber ring pushing assembly, the outer diameter of the plugging rubber ring is increased to fill the inner hole of a workpiece, the claw type internal expansion cylinder quick connector is suitable for inner holes with various shapes, so that the interaction force between the plugging rubber ring and the workpiece is kept stable, and the sealing effect is enhanced;

(2) according to the claw type internal expansion cylinder quick connector, a plurality of claws can be spread, so that the claws are abutted against the inner hole of a workpiece, an auxiliary supporting effect is achieved, and air leakage caused by movement of a plugging rubber ring due to overlarge inner hole is prevented.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 is a schematic view of an assembly structure of a jaw type internal expansion cylinder quick connector according to an embodiment of the utility model;

fig. 2 is a schematic structural diagram of a front-end lock nut according to an embodiment of the present invention, where a is a schematic sectional structural diagram of the front-end lock nut, and b is a schematic front-view structural diagram of the front-end lock nut;

fig. 3 is a schematic structural diagram of a jaw according to an embodiment of the present invention, where a is a schematic sectional structural diagram of the jaw, and b is a schematic front structural diagram of the jaw;

FIG. 4 is a schematic cross-sectional view of a spacer according to an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a mandrel according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a piston according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of the rear connection seat according to an embodiment of the present invention, where a is a schematic structural diagram of the rear connection seat in a front view, b is a schematic structural diagram of the rear connection seat in a cross-sectional view, and c is a schematic structural diagram of the rear connection seat in a rear view.

Description of reference numerals:

1. a front end lock nut; 2. a claw; 3. a tension spring; 4. a blocking spring; 5. a spacer sleeve; 6. a mandrel; 7. plugging the rubber ring; 8. a rubber ring pushing sleeve; 9. a jacket; 10. a piston; 11. a first seal ring; 12. a rear connecting seat; 13. a second seal ring; 14. a third seal ring; 15. a fourth seal ring; 16. a return spring.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

The utility model relates to a quick connector, which is mainly used for sealing parts such as air inlet and outlet, a condenser, a radiator and the like of an engine, and comprises the following components: the device comprises a mandrel 6, eight clamping jaws 2, a spacer sleeve 5, a plugging rubber ring 7 and a rubber ring pushing assembly, wherein the front end of the mandrel 6 is detachably connected with a front-end lock nut 1 through threads, and the front-end lock nut 1 is provided with a conical table which is thick in the front and thin in the rear; a gap is reserved between every two adjacent clamping jaws 2, the eight clamping jaws 2 can form a clamping sleeve with a through inner hole in a surrounding manner, the clamping sleeve is uniformly distributed and arranged on the conical table in a surrounding manner and is in sliding connection with the inclined surface of the conical table, a limiting table is arranged on the front-end lock nut 1, and the limiting table is abutted against the clamping jaws 2 to limit the clamping jaws 2 to move forwards continuously; the spacer bush 5 is in abutting joint with the rear end of the cutting sleeve; the plugging rubber ring 7 is in butt joint with the rear end of the spacer sleeve 5; the rubber ring pushing assembly abuts against the rear end of the plugging rubber ring 7, and the outer diameter of the plugging rubber ring 7 is increased by extruding the plugging rubber ring 7.

When the quick connector is at the initial position, the distance between the eight clamping jaws 2 is the minimum, the distance between the front ends of the clamping jaws 2 and the limiting table is the maximum, the quick connector can be inserted into an inner hole of a workpiece, then the rubber ring pushing component is started to push the spacer sleeve 5, the plugging rubber ring 7 and the clamping jaws 2 to slide towards the front end along the axial direction, the distance between the clamping jaws 2 is gradually increased and is propped against the inner wall of the inner hole of the workpiece for auxiliary support, when 2 front ends of jack catch and spacing platform offset, the rubber ring promotes the subassembly and continues the operation, jack catch 2 will unable continuation march forward, rubber ring promotes the subassembly and will extrude shutoff rubber ring 7, make its external diameter grow gradually, up to filling the work piece hole with the hole shutoff, realize quick sealing connection, cancellation rubber ring promotes the subassembly and promotes the action, rubber ring promotes the subassembly no longer extrudees shutoff rubber ring 7, shutoff rubber ring 7 under self elastic action, can the reconversion, can extract quick connector from the work piece this moment.

According to the above embodiment, specifically, the rubber ring pushing assembly includes: the rear connecting seat 12, the rubber ring pushing sleeve 8, the outer sleeve 9 and the piston 10 are detachably and hermetically connected with the rear end of the mandrel 6, and an air hole is formed in the rear connecting seat 12; the rubber ring pushing sleeve 8 is connected to the mandrel 6 in a sliding mode, and the rubber ring pushing sleeve 8 abuts against the rear end of the plugging rubber ring 7; the rear end of the outer sleeve 9 is detachably and hermetically connected with the rear connecting seat 12; piston 10 sealed sliding connection in on the dabber 6, the outer wall and the sealed sliding connection of 9 inner walls of overcoat of piston 10, open at 9 middle parts of overcoat has the hole, rubber ring promotes cover 8 and passes the hole and the counterbalance of piston 10 at the middle part of overcoat 9, the maximum stroke of piston 10 and rubber ring promotes cover 8 all is greater than the maximum stroke of jack catch 2.

When the quick connector is required to be connected with a workpiece, the air hole of the rear connecting seat 12 is communicated with an air source pipeline such as an air pump, the air pump is started after the quick connector is inserted into the inner hole of the workpiece, air is injected into the gap between the piston 10 and the rear connecting seat 12, the air pushes the piston 10 to move axially towards the front end along with the rise of air pressure, the rubber ring pushing sleeve 8 abutting against the piston 10 pushes the plugging rubber ring 7 to move forwards, the maximum stroke of the piston 10 and the rubber ring pushing sleeve 8 is larger than that of the clamping jaw 2, after the front end of the clamping jaw 2 abuts against the limiting table, the piston 10 and the rubber ring pushing sleeve 8 continue to move forwards to extrude the plugging rubber ring 7 until the inner hole of the workpiece is completely plugged as described in the embodiment, the air pump is closed, and the extrusion force on the plugging rubber ring 7 can be removed, so that the quick connector is pulled out of the inner hole of the workpiece.

According to the above embodiment, specifically, the mandrel 6 is provided with a step platform, the diameter of the step platform is larger than the diameter of the joint of the mandrel 6 and the piston 10, a return spring 16 is arranged between the step platform of the mandrel 6 and the piston 10, the return spring 16 is sleeved on the mandrel 6, two ends of the return spring 16 respectively abut against the step platform of the mandrel 6 and the piston 10, and the piston 10 is provided with an annular groove matched with the rear end of the return spring 16.

When starting the air pump, during the piston 10 forward motion process, the annular tank bottom extrusion on the piston 10 returns spring 16, makes to return spring 16 take place to deform, has stored elastic potential energy in the spring 16, and when closing the air pump, owing to not having atmospheric pressure's support, the elastic potential energy of returning spring 16 can change into piston 10's kinetic energy, and spring length becomes long, with piston 10 rear end promotion to make piston 10 reset fast, quick connector can extract fast.

According to the above embodiment, specifically, a positioning boss is arranged on one surface of the piston 10 abutting against the rubber ring pushing sleeve 8, an inner hole is formed in the rubber ring pushing sleeve 8, and the positioning boss is inserted into the inner hole in the rubber ring pushing sleeve 8.

According to the above embodiment, specifically, the front end of the rear connecting seat 12 is provided with a guide ring groove, the rear end of the piston 10 is provided with a guide sleeve, during the axial reciprocating motion of the piston 10, the maximum length of the guide sleeve on the piston 10 inserted into the guide ring groove of the rear connecting seat 12 is greater than the maximum stroke of the piston 10, and the guide ring groove and the guide sleeve are matched to play a role in guiding, so that the piston 10 keeps higher coaxiality during the axial reciprocating motion.

According to the above embodiment, specifically, a first annular groove is provided on the contact surface between the piston 10 and the outer sleeve 9, a first seal ring 11 is fitted in the first annular groove, a second annular groove is provided on the contact surface between the piston 10 and the mandrel 6, and a second seal ring 13 is fitted in the second annular groove, so that the piston 10 is always in a sealed state with the outer sleeve 9 and the mandrel 6 during the axial reciprocating motion process, and no air leakage occurs.

According to the above embodiment, specifically, a third annular groove is provided on the contact surface between the outer sleeve 9 and the rear connection seat 12, and a third sealing ring 14 is fitted in the third annular groove, so that the outer sleeve 9 and the rear connection seat 12 are in a sealed state, and air leakage is prevented.

According to the above embodiment, specifically, a fourth annular groove is formed in the contact surface between the rear connecting seat 12 and the mandrel 6, and a fourth sealing ring 15 is fitted in the fourth annular groove, so that the mandrel 6 and the rear connecting seat 12 are in a sealed state, and air leakage is prevented.

According to the embodiment, specifically, an annular gap is formed between the front-end lock nut 1 and the mandrel 6, an inner flange is arranged in the spacer sleeve 5, the inner flange of the spacer sleeve 5 is inserted into the annular gap, a blocking spring 4 is arranged in the annular gap, the blocking spring 4 is sleeved on the mandrel 6, two ends of the blocking spring 4 respectively abut against the inner flanges of the front-end lock nut 1 and the spacer sleeve 5 to share the extrusion force of the spacer sleeve 5 on the clamping jaws 2, and when the air pump does not inject air into the active air chamber any more, the elastic potential energy of the blocking spring 4 can be converted into the kinetic energy of the spacer sleeve 5 to push the spacer sleeve 5 to move and reset rightwards.

According to the embodiment, specifically, a plurality of tension springs 3 are sleeved on the outer ring of each jaw 2, the tension springs 3 are positioned in annular grooves formed in the outer ends of the jaws 2, the jaws 2 are guided by a conical table of the front-end lock nut 1 in the leftward movement process, the eight jaws 2 are gradually opened, when the front ends of the clamping jaws 2 are abutted against the limiting table, the gap between two adjacent clamping jaws 2 is the largest, the elastic potential energy of the tension spring 3 is the largest at the moment, when the air pump switched to when closing by opening, extension spring 3 applyed pressure to jack catch 2, and the elastic potential energy of extension spring 3 changes jack catch 2's kinetic energy into, and extension spring 3 shrink makes jack catch 2 along the female 1 toper platform rearward movement of front end lock, and the interval diminishes between jack catch 2, resumes initial position fast, and quick connector in this embodiment both can realize the quick shutoff to the work piece hole, can realize again extracting fast, and convenient to use is swift.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A jaw-type internal expansion cylinder quick connector is characterized by comprising:

the front end of the mandrel (6) is detachably connected with the front end lock nut (1), and the front end lock nut (1) is provided with a conical table which is thick in front and thin in back;

the clamping jaw locking mechanism comprises at least two clamping jaws (2), wherein the clamping jaws (2) can enclose a clamping sleeve with a through inner hole, the clamping sleeve is enclosed on a conical table and is in sliding connection with the conical table, a limiting table is arranged on a front-end lock nut (1), and the limiting table limits the movement stroke of the clamping jaws (2) through abutting against the clamping jaws (2);

the spacer bush (5) is connected to the mandrel (6) in a sliding manner, and the spacer bush (5) abuts against the rear end of the cutting sleeve;

the plugging rubber ring (7) is connected to the mandrel (6) in a sliding manner, and the plugging rubber ring (7) abuts against the rear end of the spacer sleeve (5);

the rubber ring pushing assembly is abutted against the rear end of the plugging rubber ring (7), and the outer diameter of the plugging rubber ring (7) is increased by extruding the plugging rubber ring (7).

2. The jaw-type internal expansion cylinder quick connector according to claim 1, wherein said rubber ring pushing assembly comprises:

the rear connecting seat (12), the rear connecting seat (12) is detachably and hermetically connected with the rear end of the mandrel (6), and an air hole is formed in the rear connecting seat (12);

the rubber ring pushing sleeve (8) is connected to the mandrel (6) in a sliding mode, and the rubber ring pushing sleeve (8) abuts against the rear end of the plugging rubber ring (7);

the rear end of the outer sleeve (9) is detachably and hermetically connected with the rear connecting seat (12);

piston (10), piston (10) sealed sliding connection in on dabber (6), the outer wall and the sealed sliding connection of overcoat (9) inner wall of piston (10), it has the hole to open at overcoat (9) middle part, rubber ring promotes cover (8) and passes the hole and piston (10) counterbalance at overcoat (9) middle part, the maximum stroke of piston (10) and rubber ring promotion cover (8) all is greater than the maximum stroke of jack catch (2).

3. The jaw-type internal expansion cylinder quick connector according to claim 2, characterized in that: be equipped with the stair platform on dabber (6), the diameter of stair platform is greater than the diameter of dabber (6) and piston (10) junction, is equipped with between the stair platform of dabber (6) and piston (10) and replys spring (16), replys spring (16) cover and locates on dabber (6), the both ends of replying spring (16) offset with the stair platform of dabber (6) and piston (10) respectively, be equipped with on piston (10) and reply spring (16) rear end complex ring channel.

4. The jaw-type internal expansion cylinder quick connector according to claim 2, characterized in that: and a positioning boss is arranged on one surface of the piston (10) which is abutted against the rubber ring pushing sleeve (8), an inner hole is formed in the rubber ring pushing sleeve (8), and the positioning boss is inserted into the inner hole in the rubber ring pushing sleeve (8).

5. The jaw-type internal expansion cylinder quick connector according to claim 2, characterized in that: the rear connecting seat is characterized in that a guide ring groove is formed in the front end of the rear connecting seat (12), a guide sleeve is arranged at the rear end of the piston (10), and the maximum length of the guide sleeve on the piston (10) inserted into the guide ring groove of the rear connecting seat (12) is larger than the maximum stroke of the piston (10) in the axial reciprocating motion process of the piston.

6. The jaw-type internal expansion cylinder quick connector according to claim 2, characterized in that: a first annular groove is formed in the contact surface of the piston (10) and the outer sleeve (9), a first sealing ring (11) is matched in the first annular groove, a second annular groove is formed in the contact surface of the piston (10) and the mandrel (6), and a second sealing ring (13) is matched in the second annular groove.

7. The jaw-type internal expansion cylinder quick connector according to claim 2, characterized in that: and a third annular groove is formed in the contact surface of the outer sleeve (9) and the rear connecting seat (12), and a third sealing ring (14) is matched in the third annular groove.

8. The jaw-type internal expansion cylinder quick connector according to claim 2, characterized in that: and a fourth annular groove is formed in the contact surface of the rear connecting seat (12) and the mandrel (6), and a fourth sealing ring (15) is matched in the fourth annular groove.

9. The jaw-type internal expansion cylinder quick connector according to claim 1, characterized in that: an annular gap is formed between the front end lock nut (1) and the mandrel (6), an inner flange is arranged in the spacer sleeve (5), the inner flange of the spacer sleeve (5) is inserted into the annular gap, a blocking spring (4) is arranged in the annular gap, the blocking spring (4) is sleeved on the mandrel (6), and two ends of the blocking spring (4) are respectively abutted against the inner flanges of the front end lock nut (1) and the spacer sleeve (5).

10. The jaw-type internal expansion cylinder quick connector according to claim 1, characterized in that: the outer lane cover of jack catch (2) is equipped with a plurality of extension springs (3), extension spring (3) are located the ring channel that jack catch (2) outer end was seted up.

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