CN213809391U - Hydraulic quick joint - Google Patents

Abstract

The application relates to a hydraulic quick connector, and belongs to the technical field of industrial connectors. It includes the male joint subassembly, female joint subassembly and locking Assembly, the locking Assembly includes the cutting ferrule, the steel ball, big spring and spacing steel ball, the cutting ferrule suit is outside female joint subassembly, big spring centre gripping is used for promoting the cutting ferrule to reset between cutting ferrule and female joint subassembly, female joint subassembly sets up and supplies male joint subassembly male second intercommunication to perforate, female joint subassembly lateral wall sets up the steel ball hole that supplies the steel ball installation, steel ball hole intercommunication second intercommunication is perforated, and the steel ball is spacing in the steel ball hole, the caulking groove that supplies the steel ball embedding is seted up to the outer wall of male joint subassembly, the inner wall of cutting ferrule is provided with the pushing face, the pushing face promotes the steel ball and removes and partly imbeds the caulking groove at the steel ball downthehole towards second intercommunication perforation direction, spacing steel ball is fixed in female joint subassembly outer wall, the spout that supplies spacing steel ball to slide is seted up to the cutting ferrule inner wall, the spacing groove has been seted up to the cell wall of spout. This application has quick-operation joint's locking structure comparatively stable effect.

Description

Hydraulic quick joint

Technical Field

The application relates to the field of industrial joints, in particular to a hydraulic quick joint.

Background

The quick joint comprises a hydraulic quick joint and various fluid quick joints, and is a special device for quickly connecting or disconnecting pipelines to realize quick assembly and disassembly. Because it can be quickly inserted and pulled out, it can be used in the fields of building, railway, industrial and mining hydraulic machines and tools, petroleum, metallurgy, hydroelectric power, ship and electromechanical equipment, etc. The quick joint connecting structure is the most important part of the quick joint, and the connecting mode and the structure of the quick joint directly determine the use convenience, the reliability and the product quality of the quick joint.

The existing quick connector consists of a socket and a plug, a group of steel balls are uniformly distributed on the circumference of a socket body, an outer sleeve lock is sleeved on the socket body, the outer sleeve lock can slide on the socket and is provided with a spring for resetting, and the radial position of the circle center of the steel balls uniformly distributed on the circumference of the socket body is changed through the movement of the outer sleeve lock to realize locking or withdrawing the plug. When the plug needs to be inserted into the socket, the outer sleeve lock is pushed to push the plug into the socket, the outer lock sleeve is loosened after the plug is inserted, the outer sleeve lock is restored to the original position through the inner spring to lock the plug, and when the plug needs to be pulled out, the outer sleeve lock only needs to be pushed again, so that the steel ball does not limit the pulling-out of the plug any more.

In view of the above-mentioned related art, the inventor believes that the outer lock is liable to be erroneously slipped to cause the plug to be detached from the socket, and the connection locking structure between the plug and the socket is not stable enough.

SUMMERY OF THE UTILITY MODEL

In order to solve the unstable problem of quick-operation joint's locking structure, this application provides a hydraulic pressure quick-operation joint.

The application provides a hydraulic pressure quick-operation joint adopts following technical scheme:

a hydraulic quick joint comprises a male joint component, a female joint component for inserting the male joint component and a locking component for locking the male joint component on the female joint component, wherein the locking component comprises a clamping sleeve, a steel ball, a large spring and a limiting steel ball, the clamping sleeve is sleeved outside the female joint component, the large spring is clamped between the clamping sleeve and the female joint component and used for pushing the clamping sleeve to reset, the female joint component is provided with a second communication through hole for inserting the male joint component, the side wall of the female joint component is provided with a steel ball hole for installing the steel ball, the steel ball hole is communicated with the second communication through hole, the steel ball is limited in the steel ball hole, the outer wall of the male joint component is provided with a caulking groove for embedding the steel ball, the inner wall of the clamping sleeve is provided with a pushing surface, the pushing surface pushes the steel ball to move in the steel ball hole towards the direction of the second communication through hole and is partially embedded in the caulking groove, the limiting steel ball is fixed on the outer wall of the female joint component, a sliding groove for the limiting steel ball to slide is formed in the inner wall of the clamping sleeve, and a limiting groove is formed in the groove wall of the sliding groove.

By adopting the technical scheme, the clamping sleeve is pushed to slide along the axial direction of the clamping sleeve towards the direction far away from the female joint component by the arranged large spring, so that the pushing surface in the clamping sleeve is abutted against the steel ball, thereby pushing part of the steel ball out of the steel ball hole and limiting the steel ball in the caulking groove, realizing the locking between the male joint component and the female joint component, preventing the male joint component from being pulled out of the female joint component, when the male connector assembly needs to be pulled out from the female connector assembly, the clamping sleeve needs to slide reversely to push the large spring to compress, the circumferential rotation of the sliding sleeve is limited by arranging the sliding groove and the limiting steel ball, the limiting groove is arranged in the sliding groove, when the sliding sleeve slides to the position-limiting steel ball and corresponds to the position-limiting groove, the sliding sleeve can rotate to enable the position-limiting steel ball to slide into the position-limiting groove, through the sliding of spacing groove restriction sliding sleeve, finally make the locking effect of locking Assembly more stable, be difficult to the mistake cutting ferrule that slides and lead to the male joint subassembly to deviate from.

Optionally, the ferrule includes an inner ferrule, an outer ferrule and a first inner collar, the inner wall of the outer ferrule is provided with a limiting protrusion, the inner wall of the outer ferrule is further provided with a first inner collar groove, the first inner collar is mounted in the first inner collar groove, the inner ferrule is clamped between the first inner collar and the limiting protrusion, and the pushing surface is disposed on the inner ferrule.

Through adopting above-mentioned technical scheme, it is fixed to interior cutting ferrule and outer cutting ferrule through spacing arch and rand in first, sets up outer cutting ferrule and interior cutting ferrule two parts for interior cutting ferrule can adopt more wear-resisting material to make, and when rotatory cutting ferrule, reduce wearing and tearing, only interior cutting ferrule part adopts wear-resisting material simultaneously, thereby reduces manufacturing cost, promotes the face and sets up in interior cutting ferrule, improves the locking effect.

Optionally, the diameter of one end of the steel ball hole communicated with the second communication through hole is smaller than that of the steel ball.

Through adopting above-mentioned technical scheme for the steel ball is restricted, and the steel ball can't pass through the steel ball hole and get into in the second intercommunication is perforated, simultaneously with the cutting ferrule cooperation, makes the steel ball restricted between cutting ferrule and female joint subassembly, and locking effect is more stable.

Optionally, the pushing surface comprises a limiting surface and a guiding surface, the limiting surface is the inner clamping sleeve faces the inner wall of the female joint assembly, the guiding surface is the portion, facing the inner clamping sleeve, of the side wall of the limiting protrusion, not abutted to the limiting protrusion, and the guiding surface is far away from the inner ring of the limiting protrusion and is obliquely arranged towards the first inner clamping ring.

Through adopting above-mentioned technical scheme, through setting up the spigot surface, when the cutting ferrule slided, through the spigot surface can be better push the steel ball into the steel ball hole, the steel ball part embedding caulking groove locks the male joint subassembly, and the spacing face of setting is spacing at the locking state the steel ball.

Optionally, the side wall of the inner clamping sleeve abutted against the first inner clamping ring is set to be an abutting surface, and the outer edge of the abutting surface is obliquely arranged towards the direction of the limiting protrusion.

Through adopting above-mentioned technical scheme for the spacing power direction of the internal cutting ferrule of first interior rand is not vertical direction, and rand can expand outward in the effect of reverse force in first interior rand for when cutting ferrule in the restriction of first interior rand, it is difficult to block to rotate between interior cutting ferrule and the outer cutting ferrule laborsaving more, conveniently unscrew spacing steel ball from the spacing groove.

Optionally, the male joint assembly includes a male joint, a valve core and a small spring, the male joint is coaxially provided with a first communicating through hole, the valve core and the small spring are arranged in the male joint, and the valve core is pushed by the small spring to block the first communicating through hole;

the female joint assembly comprises a female joint cap, a female joint, an inner spring, a sliding sleeve and a pull rod assembly, one end of the female joint is fixed in the female joint cap in a threaded mode, the large spring is clamped between the inner clamping sleeve and the female joint cap, a second communication perforation is formed in the female joint, the sliding sleeve is slidably installed in the second communication perforation, the sliding sleeve is sleeved outside the pull rod assembly, the pull rod assembly faces towards one end of the female joint, a sealing block is arranged at one end of the female joint, a first sealing ring is arranged in the sliding sleeve, and the sliding sleeve pushes the first sealing ring to abut against the sealing block to seal the second communication perforation under the action of the inner spring.

Through adopting above-mentioned technical scheme, promote the case through the little spring, make the case can the shutoff first intercommunication perforation on the male joint, realize the cutout of male joint, promote the sliding sleeve through the internal spring, make the sliding sleeve butt on the closing piece, thereby close the second intercommunication perforation, realize the cutout of female joint, set up first sealing ring and improved the leakproofness between sliding sleeve and the closing piece, when the male joint inserts the second intercommunication perforation of female joint, the male joint promotes the sliding sleeve and slides in the second intercommunication perforation, realize the open flow of female joint, the closing piece inserts first intercommunication perforation simultaneously, promote the valve core through the closing piece and compress down the spring, thereby realized the intercommunication between female joint and the male joint, locking assembly locks the male joint in the female joint simultaneously, realize the high-speed joint installation.

Optionally, the male joint assembly further includes a positioning seat, a second inner collar groove is formed in an inner wall of the first communication through hole, a second inner collar is installed in the second inner collar groove, and the small spring is clamped between the positioning seat and the valve core.

Through adopting above-mentioned technical scheme, the snap ring groove supplies the installation of the interior snap ring of second in setting up the second, sets up the positioning seat, and the installation of better confession little spring is firm, and the positioning seat is restricted in snap ring department in the second under the promotion of little spring, and the case is when being promoted compression spring simultaneously, and little spring and case are difficult to skew male joint's axis more.

Optionally, the female joint assembly further comprises an inner positioning seat, the pull rod assembly comprises a sealing head and a slide rod, the inner positioning seat is a stepped pipe, an annular limiting shoulder is arranged on the inner wall of the female joint cap, the end with the largest outer diameter of the inner positioning seat is clamped between the end part of the female joint and the annular limiting shoulder, the inner spring is clamped between the sliding sleeve and the step surface of the outer wall of the inner positioning seat, a spring limiting shoulder is arranged on the inner wall of the annular limiting shoulder, the inner diameter of the end with the largest outer diameter of the inner positioning seat is also larger, one end of the sealing head is positioned in the end with the largest inner diameter of the inner positioning seat and is provided with a second sealing ring, a bottom spring is clamped between the sealing head and the spring limiting shoulder, the second sealing ring abuts against the step surface of the inner wall of the inner positioning seat, and one end of the slide rod is slidably arranged at one end of the sealing block far away from the bottom spring, the sealing block is arranged at one end, far away from the sealing head, of the sliding rod.

Through adopting above-mentioned technical scheme, it is spacing to set up the interior positioning seat of annular spacing shoulder, the interior spring centre gripping is between sliding sleeve and interior positioning seat, make the interior spring installation more firm, the inner spring is better to the pushing action of sliding sleeve, the end spring of setting is used for promoting the sealing head, make the step face of interior positioning seat inner wall in the sealing head butt, play the effect of double sealing, further cut off to the female joint, the second sealing ring is used for improving the leakproofness between sealing head and the interior positioning seat, the slide bar promotes the sealing head and slides under the promotion of case and little spring simultaneously, thereby open the second double sealing of female joint, the relative sealing head of slide bar can slide, make the slide bar when promoting case and sealing head, the sliding distance of case and sealing head can reduce, reduce the inside space size requirement of female joint and male joint.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the clamping sleeve is pushed by the arranged large spring to slide along the axial direction of the clamping sleeve towards the direction far away from the female joint component, so that the pushing surface in the clamping sleeve is abutted against the steel ball, thereby pushing part of the steel ball out of the steel ball hole and limiting the steel ball in the caulking groove, realizing the locking between the male joint component and the female joint component, preventing the male joint component from being pulled out of the female joint component, when the male connector assembly needs to be pulled out from the female connector assembly, the clamping sleeve needs to slide reversely to push the large spring to compress, the circumferential rotation of the sliding sleeve is limited by arranging the sliding groove and the limiting steel ball, the limiting groove is arranged in the sliding groove, when the sliding sleeve slides to the position-limiting steel ball and corresponds to the position-limiting groove, the sliding sleeve can rotate to enable the position-limiting steel ball to slide into the position-limiting groove, the sliding of the sliding sleeve is limited through the limiting groove, so that the locking effect of the locking assembly is more stable, and the male joint assembly is not easy to drop off due to mistaken sliding of the clamping sleeve;

2. by arranging the guide surface, when the clamping sleeve slides, the steel ball can be better pushed into the steel ball hole through the guide surface, the steel ball is partially embedded into the caulking groove to lock the male connector assembly, the steel ball is limited in a locking state by the arranged limiting surface, meanwhile, the limiting force direction of the first inner clamping ring on the inner clamping sleeve is not a vertical direction, the first inner clamping ring can expand outwards under the action of reverse force, the inner clamping sleeve and the outer clamping sleeve rotate relatively to each other, the clamping is more labor-saving and is not easy to clamp, and the limiting steel ball can be conveniently screwed out of the limiting groove;

3. the valve core is pushed by the small spring, so that the valve core can block the first communicating through hole on the male joint, the flow breaking of the male joint is realized, the sliding sleeve is pushed by the inner spring, the sliding sleeve is abutted to the sealing block, the second communicating through hole is sealed, the flow breaking of the female joint is realized, the sealing performance between the sliding sleeve and the sealing block is improved by the first sealing ring, when the male joint is inserted into the second communicating through hole of the female joint, the sliding sleeve is pushed by the male joint to slide in the second communicating through hole, the flow opening of the female joint is realized, meanwhile, the sealing block is inserted into the first communicating through hole, the valve core is pushed by the sealing block to reduce the spring, the communication between the female joint and the male joint is realized, meanwhile, the male joint is locked in the female joint by the locking assembly, and the quick connection installation is realized.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view of the male fitting;

fig. 3 is a sectional view of the female joint.

Description of reference numerals: 1. a male connector; 11. a first communication through-hole; 12. caulking grooves; 13. limiting clamping protrusions; 14. a second inner collar groove; 15. a second inner collar; 2. a valve core; 21. an O-shaped sealing ring; 22. positioning seats; 31. a small spring; 32. an inner spring; 33. a bottom spring; 34. a large spring; 4. a female joint cap; 41. an annular limiting shoulder; 42. a spring limit shoulder; 5. a female joint; 51. a second communication through hole; 52. a steel ball hole; 6. a sliding sleeve; 61. a first seal ring; 7. an inner positioning seat; 81. a closing head; 811. a slide hole; 812. a limiting hole; 82. a slide bar; 821. an annular projection; 83. a sealing block; 84. a second seal ring; 85. a limiting column; 91. a card sleeve; 911. an inner cutting sleeve; 9111. a limiting surface; 9112. a guide surface; 9113. an abutting surface; 912. an outer ferrule; 9121. a limiting bulge; 9122. a first inner collar groove; 9123. a chute; 9124. a limiting groove; 913. a first inner collar; 92. a steel ball; 93. and a steel ball is limited.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses hydraulic pressure quick-operation joint. Referring to FIG. 1, a hydraulic quick connector includes a male connector assembly, a female connector assembly into which the male connector assembly is inserted, and a locking assembly that locks the male connector assembly to the female connector assembly.

When the male connector 1 and the female connector 5 are not fixed by mutual insertion:

referring to fig. 1 and 2, the male joint assembly includes a male joint 1, a valve core 2, a positioning seat 22 and a small spring 31, the male joint 1 is coaxially provided with a first communicating through hole 11, the outer wall of one end of the male joint 1 is provided with an embedded groove 12 matched with the locking assembly, the embedded groove 12 is annular, the inner wall of the first communicating through hole 11 near one end of the embedded groove 12 is provided with a limiting clamping protrusion 13, the inner wall of the first communicating through hole 11 is further provided with a second inner clamping ring groove 14, a second inner clamping ring 15 is installed in the second inner clamping ring groove 14, the valve core 2, the positioning seat 22 and the small spring 31 are arranged in the first communicating through hole and located between the second inner clamping ring 15 and the limiting clamping protrusion 13, the positioning seat 22 abuts against the second inner clamping ring 15, the small spring 31 is clamped between the positioning seat 22 and the valve core 2, the valve core 2 abuts against the limiting clamping protrusion 13 under the pushing of the small spring 31 so as to block the first communicating through hole 11, an O-type sealing ring 21 is clamped between the valve core 2 and the limiting clamping protrusion 13 so as to improve the sealing performance, meanwhile, the positioning socket 22 is penetrated through the middle, so that the connectivity inside the first through hole 11 is not affected.

Referring to fig. 1 and 3, the female joint assembly includes a female joint cap 4, a female joint 5, an inner spring 32, a sliding sleeve 6, an inner positioning seat 7 and a pull rod assembly, the inner positioning seat 7 is a stepped pipe, an annular limiting shoulder 41 is arranged on the inner wall of the female joint cap 4, one end of the inner positioning seat 7 with the largest outer diameter abuts against the annular limiting shoulder 41, one end of the female joint 5 is fixed in the female joint cap 4 in a threaded manner, one end of the inner positioning seat 7 with the largest outer diameter is clamped between the end of the female joint 5 and the annular limiting shoulder 41, the female joint 5 is provided with a second communicating through hole 51 for inserting the male joint 1, the sliding sleeve 6 is slidably mounted in the second communicating through hole 51, one end of the sliding sleeve 6 is sleeved outside the inner positioning seat 7, and the inner spring 32 is clamped between the stepped surfaces of the sliding sleeve 6 and the outer wall of the inner positioning seat 7 and is used for providing elastic force for the sliding sleeve 6.

The pull rod assembly comprises a sealing head 81 and a sliding rod 82, a spring limiting shoulder 42 is arranged on the inner wall of an annular limiting shoulder 41, the inner diameter of the larger end of the outer diameter of the inner positioning seat 7 is larger, one end of the sealing head 81 is located in the larger end of the inner diameter of the inner positioning seat 7 and is provided with a second sealing ring 84, a bottom spring 33 is clamped between the sealing head 81 and the spring limiting shoulder 42, and the second sealing ring 84 abuts against the step surface of the inner wall of the inner positioning seat 7.

The closing head 81 deviates from the terminal surface of the spacing shoulder 42 of spring and has been seted up slide opening 811, slide bar 82 one end is slided and is installed in slide opening 811 and the outer wall is provided with annular protrusion 821, closing head 81 lateral wall is seted up and is communicated spacing hole 812 of slide opening 811, spacing post 85 is embedded to be equipped with in spacing hole 812, restrict slide bar 82 roll-off slide opening 811 through spacing post 85, the slide bar 82 other end passes sliding sleeve 6 and is provided with closing block 83, be provided with first sealing ring 61 in the sliding sleeve 6, sliding sleeve 6 promotes first sealing ring 61 butt in closing block 83 and seals second intercommunication perforation 51 under the effect of inner spring 32.

Locking assembly includes cutting ferrule 91, steel ball 92, big spring 34 and spacing steel ball 93, cutting ferrule 91 includes interior cutting ferrule 911, outer cutting ferrule 912 and first interior rand 913, outer cutting ferrule 912 slides the suit outside female joint 5, outer cutting ferrule 912 inner wall is provided with spacing arch 9121, first interior rand groove 9122 has still been seted up to outer cutting ferrule 912 inner wall, first interior rand 913 installs in first interior rand groove 9122, interior rand 911 centre gripping is between first interior rand 913 and spacing arch 9121, big spring 34 centre gripping receives the extrusion between interior rand 911 and female joint cap 4, promote cutting ferrule 91 when being used for male joint 1 to restore to the throne.

The side wall of the female joint 5 is provided with two steel ball holes 52 for mounting the steel balls 92, the steel ball holes 52 are communicated with the second communication through hole 51, the two steel ball holes 52 are arranged along the circumferential direction of the female joint 5 in a 180-degree rotation symmetry manner, the corresponding steel balls 92 are also arranged in two, and the diameter of one end, communicated with the second communication through hole 51, of each steel ball hole 52 is smaller than that of each steel ball 92, so that the steel balls 92 are limited to enter the second communication through hole 51.

Be provided with the impetus face on interior cutting ferrule 911, the impetus face includes spacing face 9111 and spigot surface 9112, spacing face 9111 is interior cutting ferrule 911 towards the inner wall of female joint subassembly, spigot surface 9112 is interior cutting ferrule 911 not with the part of spacing protruding 9121 butt towards the lateral wall of spacing protruding 9121, the inner circle of spacing protruding 9121 is kept away from to spigot surface 9112 sets up towards first interior rand 913 direction slope, spigot surface 9112 butt 911 steel ball 92, the lateral wall of interior cutting ferrule and first interior rand 913 butt sets up to butt face 9113, butt face 9113 is outer along setting up towards spacing protruding 9121 direction slope.

Spacing steel ball 93 is fixed in the female joint subassembly outer wall, and cutting ferrule 91 inner wall sets up the spout 9123 that supplies spacing steel ball 93 to slide, and spacing groove 9124 has been seted up to one side that first interior rand 913 was kept away from to the cell wall of spout 9123.

When the male joint 1 and the female joint 5 are mutually inserted and fixed:

referring to fig. 1, 2 and 3, the male connector 1 pushes the sliding sleeve 6 to slide in the second communicating through hole 51, the sealing block 83 is inserted into the first communicating through hole 11, the valve core 2 is pushed by the sealing block 83 to compress the small spring 31, the valve core 2 pushes the sealing block 83 under the action of the small spring 31, the sealing block 83 pushes the sliding rod 82 to slide into the bottom of the sliding hole 811 and finally pushes the sealing head 81 to slide in the direction away from the inner positioning seat 7, so as to achieve the communication between the female connector 5 and the male connector 1, the clamping sleeve 91 slides under the push of the large spring 34, the guiding surface 9112 pushes the steel ball 92 to move in the steel ball hole 52 in the direction of the second communicating through hole 51 and to be partially embedded in the embedding groove 12, the limiting surface 9111 abuts against and limits the steel ball 92 to be released from the embedding groove 12, and the installation is more convenient without adjusting the inserting angle of the male connector 1 because the embedding groove 12 is annular, and finally the male connector 1 is locked in the female connector 5 by the locking assembly, and quick connection and installation are realized.

The limiting steel ball 93 slides into the limiting groove 9124 by rotating the outer cutting sleeve 912, and the cutting sleeve 91 is limited to slide to compress the large spring 34 by matching the limiting steel ball 93 with the limiting groove 9124.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. A hydraulic quick connector is characterized in that: the locking device comprises a male joint component, a female joint component for inserting the male joint component and a locking component for locking the male joint component on the female joint component, wherein the locking component comprises a clamping sleeve (91), a steel ball (92), a large spring (34) and a limiting steel ball (93), the clamping sleeve (91) is sleeved outside the female joint component, the large spring (34) is clamped between the clamping sleeve (91) and the female joint component and used for pushing the clamping sleeve (91) to reset, the female joint component is provided with a second communication through hole (51) for inserting the male joint component, the side wall of the female joint component is provided with a steel ball hole (52) for installing the steel ball (92), the steel ball hole (52) is communicated with the second communication through hole (51), the steel ball (92) is limited in the steel ball hole (52), the outer wall of the male joint component is provided with a caulking groove (12) for embedding the steel ball (92), the inner wall of cutting ferrule (91) is provided with the push face, the push face promotes steel ball (92) move and partial embedding towards second intercommunication perforation (51) direction in steel ball hole (52) in caulking groove (12), spacing steel ball (93) are fixed in female joint subassembly outer wall, the confession has been seted up to cutting ferrule (91) inner wall spout (9123) that spacing steel ball (93) slided, spacing groove (9124) has been seted up to the cell wall of spout (9123).

2. The hydraulic quick connector as recited in claim 1, wherein: cutting ferrule (91) is including interior cutting ferrule (911), outer cutting ferrule (912) and first interior rand (913), outer cutting ferrule (912) inner wall is provided with spacing arch (9121), first interior rand groove (9122) has still been seted up to outer cutting ferrule (912) inner wall, first interior rand (913) install in first interior rand groove (9122), interior cutting ferrule (911) centre gripping in first interior rand (913) with between spacing arch (9121), the push away the face set up in interior cutting ferrule (911).

3. The hydraulic quick connector as recited in claim 1, wherein: the diameter of one end of the steel ball hole (52) communicated with the second communication through hole (51) is smaller than that of the steel ball (92).

4. The hydraulic quick connector as recited in claim 2, wherein: the push surface includes spacing face (9111) and spigot (9112), spacing face (9111) does interior cutting ferrule (911) orientation the inner wall of box subassembly, spigot (9112) does interior cutting ferrule (911) orientation the lateral wall of spacing arch (9121) not with the part of spacing arch (9121) butt, spigot (9112) is kept away from the inner circle of spacing arch (9121) is towards the slope of first interior rand (913) direction sets up.

5. The hydraulic quick connector as recited in claim 2, wherein: interior cutting ferrule (911) with the lateral wall of rand (913) butt sets up to butt face (9113) in first, butt face (9113) outer along towards spacing arch (9121) direction slope sets up.

6. The hydraulic quick connector as recited in claim 2, wherein: the male joint assembly comprises a male joint (1), a valve core (2) and a small spring (31), a first communication through hole (11) is coaxially formed in the male joint (1), the valve core (2) and the small spring (31) are arranged in the male joint (1), and the valve core (2) is pushed by the small spring (31) to block the first communication through hole (11);

the female joint component comprises a female joint cap (4), a female joint (5), an inner spring (32), a sliding sleeve (6) and a pull rod component, one end of the female joint (5) is fixed in the female joint cap (4) in a threaded manner, the large spring (34) is clamped between the inner clamping sleeve (911) and the female joint cap (4), the second communication through hole (51) is formed in the female joint (5), the sliding sleeve (6) is arranged in the second communication perforation (51) in a sliding way, the sliding sleeve (6) is sleeved outside the pull rod assembly, a sealing block (83) is arranged at one end of the pull rod assembly facing the female joint (5), a first sealing ring (61) is arranged in the sliding sleeve (6), and the sliding sleeve (6) pushes the first sealing ring (61) to abut against the sealing block (83) under the action of the inner spring (32) so as to seal the second communication through hole (51).

7. The hydraulic quick connector as recited in claim 6, wherein: the male joint assembly further comprises a positioning seat (22), a second inner clamping ring groove (14) is formed in the inner wall of the first communicating through hole (11), a second inner clamping ring (15) is installed in the second inner clamping ring groove (14), and the small spring (31) is clamped between the positioning seat (22) and the valve core (2).

8. The hydraulic quick connector as recited in claim 6, wherein: the female joint assembly further comprises an inner positioning seat (7), the pull rod assembly comprises a sealing head (81) and a sliding rod (82), the inner positioning seat (7) is a stepped pipe, the inner wall of the female joint cap (4) is provided with an annular limiting shoulder (41), the end, with the largest outer diameter, of the inner positioning seat (7) is clamped between the female joint (5) end and the annular limiting shoulder (41), an inner spring (32) is clamped between the sliding sleeve (6) and the stepped surface of the outer wall of the inner positioning seat (7), the inner wall of the annular limiting shoulder (41) is provided with a spring limiting shoulder (42), the inner diameter of the larger end of the outer diameter of the inner positioning seat (7) is also larger, one end of the sealing head (81) is positioned in the larger end of the inner positioning seat (7) and provided with a second sealing ring (84), the sealing head (81) and a bottom spring (33) is clamped between the spring limiting shoulders (42), the second sealing ring (84) is abutted to the step surface of the inner wall of the inner positioning seat (7), one end of the sliding rod (82) is slidably mounted at one end, away from the bottom spring (33), of the sealing block (83), and the sealing block (83) is arranged at one end, away from the sealing head (81), of the sliding rod (82).

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