One-handed quick release collet

Abstract

The application discloses a single-hand operation quick-release chuck, which comprises a mandrel with a pick head slot, a slide pin is arranged in the pick head slot, the slide pin can push out the pick head in the pick head slot under the elastic force of an inner elastic element, a first perforation and a second perforation are arranged on the side wall of the pick head slot of the mandrel, a first clamping element and a second clamping element are slidably arranged in the first perforation and the second perforation, an outer elastic element can provide an axial elastic force to an outer sleeve arranged outside the mandrel, so that the outer sleeve slides and tightly presses the first clamping element to clamp the slide pin, the second clamping element can be kept in a clamping element anti-retreating blocking groove under the elastic force of the outer elastic element, and then the second clamping element clamps the pick head in the opening end of the pick head slot, the outer sleeve can overcome the elastic force of the outer elastic element to make the first clamping element separate from the slide pin, and make the second clamping element separate from the pick head, and the pick head is automatically pushed out by a set distance under the elastic force of the inner elastic element, the single-hand installation and dismounting of the pick head are realized, the pick head cannot automatically fall off during the use process or the dismounting process, and the use is safe.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of hardware tools, in particular to a kind of single-handed operation quick release chuck. BACKGROUND

[0002] In some construction, electric tool is often used to lock screw, electric worker is replaced by chuck to realize the clamping of different screwdriver head, to realize the operation to different screw, chuck generally includes mandrel, outer sleeve and steel ball, mandrel one end forms the insertion of screwdriver head for the insertion of screwdriver head, the other end forms the hexagonal column for being installed in electric tool, mandrel one end for the insertion of screwdriver head side wall is opened steel ball hole, steel ball is contained in steel ball hole, steel ball hole is formed towards the insertion of screwdriver head inside direction and forms the structure of necking, so that steel ball can be stretched into the insertion of screwdriver head and be stuck up screwdriver head, but also will not fall in the insertion of screwdriver head, outer sleeve is sleeved on the outside of mandrel, the inner side of outer sleeve front end forms taper slot, steel ball is slid along with outer sleeve and realizes the clamping or loosening of screwdriver head, outer sleeve and mandrel generally adopt threaded connection to realize axial sliding and positioning, the clamping, positioning and loosening of screwdriver head by steel ball are realized by screwing outer sleeve, outer sleeve is sleeved on the outside of mandrel by radial stopper, such as snap spring, etc., can slide and set distance, spring is installed on mandrel, and outer sleeve is kept in the state that steel ball clamps screwdriver head.

[0003] The above chuck needs to be operated by workers with both hands when clamping and loosening screwdriver head, that is, one hand operates outer sleeve, and the other hand inserts and pulls out screwdriver head, and due to the fact that workers are often limited by construction position and other factors during construction, it is difficult to free up both hands to replace screwdriver head, resulting in inconvenient operation of replacing screwdriver head.

[0004] And for the outer sleeve kept in a stable position on the outside of mandrel by spring force, when steel ball clamps screwdriver head, due to the fact that electric tool has a large vibration during construction, it is easy to cause outer sleeve to press spring to slide along the axial direction of screwdriver head, and further cause steel ball to possibly exit the arc-shaped groove of screwdriver head, so that screwdriver head is clamped and loosened, and even falls, resulting in failure of locking screw, and even danger. SUMMARY

[0005] In order to make up for the above shortcomings, the present application provides a kind of single-handed operation quick release chuck, which can realize the quick replacement of screwdriver head by electric tool with one hand, is convenient to use, and the chuck is clamped stably to screwdriver head, is not affected by electric tool vibration, is stable and safe to use.

[0006] The technical scheme adopted by the present application to solve the technical problems is as follows: a kind of single-handed operation quick release chuck, including mandrel, outer sleeve, sliding pin, outer elastic element, inner elastic element, first clamping element and second clamping element.

[0007] One end of the spindle is formed with a screwdriver bit slot that extends axially, with one end open and the other closed. A sliding pin can be slidably inserted into the screwdriver bit slot. The open end of the screwdriver bit slot allows the screwdriver bit to be inserted in a circumferential direction. The inner elastic element provides the sliding pin with an elastic holding force toward the opening of the screwdriver bit slot. The axial sliding of the sliding pin can push the screwdriver bit toward the opening of the screwdriver bit slot.

[0008] The screwdriver bit slot sidewall is provided with a first through hole and a second through hole that communicate with the inside of the screwdriver bit slot. The first locking piece and the second locking piece are respectively able to slide a set distance along the axial direction of the first through hole and the second through hole and are accommodated in the first through hole and the second through hole. The first locking piece and the second locking piece always extend a set length outside at least one end of the first through hole and the second through hole.

[0009] The outer sleeve can slide a set distance along the axis and is sleeved on the outer side of one end of the mandrel. The outer elastic element provides the outer sleeve with an elastic holding force towards the bottom surface of the mandrel, and the elastic force of the outer elastic element is greater than that of the inner elastic element. A radially concave first limiting groove is formed on the inner side wall of the outer sleeve, and a radially concave second limiting groove is provided on the outer circumferential side wall of the sliding pin. The first limiting groove and the second limiting groove can be directly opposite the first through hole. The first locking piece can enter the first limiting groove and disengage from the second limiting groove, or the first locking piece can enter the second limiting groove and disengage from the first limiting groove.

[0010] The second through hole can be directly connected to the arc-shaped groove on the outer circumference of the screwdriver bit inserted into the screwdriver bit slot, and the second clip can be inserted into the arc-shaped groove on the outer circumference of the screwdriver bit to prevent the screwdriver bit from sliding axially.

[0011] The inner side of one end of the outer sleeve has a clearance groove that communicates directly with the second through hole. The second locking piece can enter the clearance groove and exit the arc-shaped groove on the outer circumference of the screwdriver bit. The inner side of one end of the outer sleeve is also provided with a locking piece anti-retraction groove. The depth of the locking piece anti-retraction groove facing the opening of the screwdriver bit slot is greater than the depth of the end facing the bottom surface of the screwdriver bit slot. The end of the locking piece anti-retraction groove facing the bottom surface of the screwdriver bit slot communicates with the clearance groove. The inclined bottom surface of the locking piece anti-retraction groove can press against the second locking piece and keep it in the arc-shaped groove on the outer circumference of the screwdriver bit.

[0012] As a further improvement of the present invention, the clearance groove structure at one end of the outer jacket forms a slope with a gradually shallower depth toward the end of the anti-reverse stop groove of the card piece.

[0013] As a further improvement of the present invention, the clearance groove structure at one end of the outer jacket and the anti-reverse stop groove of the card are connected by a rounded arc surface or a chamfered bevel.

[0014] As a further improvement of the present application, the first and second clamping members are steel balls, and the second perforation is formed with a necked structure at one end of the screwdriver head slot, which has a smaller diameter than the second clamping member.

[0015] As a further improvement of the present application, the slide pin is further provided with a radially inwardly recessed guide groove on the outer circumferential wall thereof, which is in communication with the second limiting groove at one end thereof facing the opening direction of the screwdriver head slot, and has a depth smaller than that of the second limiting groove, and the first clamping member is always located in the guide groove or the radially inwardly recessed groove structure at one end thereof facing the direction of the mandrel.

[0016] As a further improvement of the present application, the slide pin is further provided with a magnet at one end thereof facing the opening direction of the screwdriver head slot, which can be magnetically attracted to the screwdriver head inserted into the screwdriver head slot.

[0017] As a further improvement of the present application, the inner side wall of the outer sleeve is formed with a beveled structure at one end of the first limiting groove thereof facing the opening direction of the screwdriver head slot, which is inclined towards the opening direction of the screwdriver head slot.

[0018] As a further improvement of the present application, the inner elastic member is a compression spring, and the two ends thereof in the elastic extension direction are tightly abutted against the bottom surface of the screwdriver head slot and one end of the slide block facing the bottom surface of the screwdriver head slot, respectively.

[0019] As a further improvement of the present application, the inner side of the outer sleeve is further formed with a radially inwardly recessed mounting groove, which forms a mounting space for the outer elastic member between the outer circumferential wall of the mandrel and the mounting groove, and the outer circumferential wall of the mandrel located in the mounting space of the outer elastic member is provided with spring clip grooves spaced along the axial direction thereof, two spring clips are clamped in the spring clip grooves on the outer circumferential wall of the mandrel, and a gasket is further sleeved on the outer circumferential wall of the mandrel, which is tightly clamped between the two spring clips, and the outer elastic member is a compression spring, and the two ends thereof in the elastic extension direction are tightly abutted against the surface of the gasket and the side wall of the mounting groove on the inner side wall of the outer sleeve close to the bottom surface of the screwdriver head slot, respectively.

[0020] As a further improvement of the present application, the outer sleeve comprises a front sleeve and a rear sleeve, the rear sleeve is sleeved on the outer circumferential wall of the mandrel, one end of the front sleeve is sleeved on the outer circumferential wall of the mandrel, the other end of the front sleeve is sleeved on the outer circumferential wall of the rear sleeve, and the outer side wall of the rear sleeve and the inner side wall of the other end of the front sleeve are connected by a buckle structure, the first limiting groove is formed in the inner side of the rear sleeve, and the avoiding groove and the clamping member anti-back-off blocking groove are formed in the inner side of one end of the front sleeve.

[0021] The beneficial effects of the present application are: the present application realizes that the second clamping piece is opposite to the avoiding groove or the clamping piece anti-back-off blocking groove by sliding the sleeve on the mandrel, and then realizes the clamping and positioning or loosening of the screwdriver head by the second clamping piece, meanwhile, the clamping piece anti-back-off blocking groove is designed as an inverted conical structure, so that when the second clamping piece slides towards the bottom surface of the mandrel after entering the clamping piece anti-back-off blocking groove, the screwdriver head is clamped more tightly, and the screwdriver head cannot enter the avoiding groove structure to cause loosening, which ensures the stability of the screwdriver head during use, avoids loosening of the screwdriver head due to vibration, and avoids personnel and property loss caused by falling; when the screwdriver head is installed, the screwdriver head is only inserted into the screwdriver head insertion slot, and the first clamping piece automatically enters the second limiting groove of the slide pin to lose the axial blocking of the sleeve due to the sliding of the slide pin under the pressure of the screwdriver head, the sleeve automatically slides backward under the action of the outer elastic piece to press the first clamping piece, and the clamping piece anti-back-off blocking groove presses the second clamping piece, thereby realizing automatic clamping and positioning of the screwdriver head; when the screwdriver head is disassembled, the first clamping piece and the second clamping piece enter the first limiting groove of the sleeve and the avoiding groove respectively, the second limiting groove of the slide pin loses the stop of the first clamping piece, the slide pin ejects the screwdriver head from the screwdriver head insertion slot by a set distance under the action of the inner elastic piece, realizes automatic exit of the screwdriver head from the screwdriver head insertion slot, and the magnet installed on the slide pin prevents the screwdriver head from being ejected from the screwdriver head insertion slot, thereby avoiding damage to personnel and property, the present application realizes one-handed installation and disassembly of the screwdriver head, does not need to be operated by both hands, is convenient to operate, does not cause the screwdriver head to automatically fall off or be ejected during disassembly of the screwdriver head, the screwdriver head does not loosen due to vibration during normal use, ensures smooth locking of the screw, avoids safety hazards caused by falling of the screwdriver head, and realizes safe operation. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a front view of the present application;

[0023] Figure 2 It is a structure principle diagram of the present application in the screwdriver head insertion state;

[0024] Figure 3 It is a principle diagram of the present application in the screwdriver head clamping use state;

[0025] Figure 4 It is a principle diagram of the present application in the screwdriver head disassembly state;

[0026] Figure 5 It is a principle sectional view of the mandrel structure of the present application;

[0027] Figure 6 It is a principle sectional view of the sleeve structure of the present application;

[0028] Figure 7 It is a principle sectional view of the slide pin structure of the present application. DETAILED DESCRIPTION

[0029] Embodiment: A single-hand operation quick release chuck, comprising a mandrel 1, an outer sleeve, a slide pin 2, an outer elastic member 3, an inner elastic member 4, a first clamping member 5 and a second clamping member 6;

[0030] The mandrel 1 is formed with a screwdriver head slot 7 with an open end and a closed end at the other end, the slide pin 2 is inserted into the screwdriver head slot 7 and can slide axially, the open end of the screwdriver head slot 7 can be inserted into the circumferential direction of the screwdriver head 8, the inner elastic member 4 provides the slide pin 2 with elastic retention force towards the opening direction of the screwdriver head slot 7, and the axial sliding of the slide pin 2 can push the screwdriver head 8 towards the opening direction of the screwdriver head slot 7;

[0031] The side wall of the screwdriver head slot 7 is provided with a first perforation 9 and a second perforation 10 which are in communication with the inside of the screwdriver head slot 7, the first clamping member 5 and the second clamping member 6 are respectively accommodated in the first perforation 9 and the second perforation 10 and can slide axially in the first perforation 9 and the second perforation 10 by a certain distance, and the first clamping member 5 and the second clamping member 6 respectively extend out of at least one side of the first perforation 9 and the second perforation 10 by a certain length;

[0032] The outer sleeve is sleeved on the outer side of one end of the mandrel 1 and can slide axially by a certain distance, the outer elastic member 3 provides the outer sleeve with elastic retention force towards the bottom surface direction of the mandrel 1, and the elastic force of the outer elastic member 3 is greater than that of the inner elastic member 4, the inner side wall of the outer sleeve is formed with a first limiting groove 11 which is radially concave, the circumferential outer side wall of the slide pin 2 is provided with a second limiting groove 12 which is radially concave, the first limiting groove 11 and the second limiting groove 12 can respectively face the first perforation 9, the first clamping member 5 can enter the first limiting groove 11 and disengage from the second limiting groove 12, or the first clamping member 5 can enter the second limiting groove 12 and disengage from the first limiting groove 11;

[0033] The second perforation 10 can be in communication with the arc-shaped groove 13 on the circumferential outer side wall of the screwdriver head 8 inserted into the screwdriver head slot 7, and the second clamping member 6 can enter the arc-shaped groove 13 on the circumferential outer side wall of the screwdriver head 8 to prevent the screwdriver head 8 from sliding axially;

[0034] The inner side of one end of the outer sleeve is formed with an avoidance groove 14 which can be in communication with the second perforation 10, the second clamping member 6 can enter the avoidance groove 14 and exit the arc-shaped groove 13 on the circumferential outer side wall of the screwdriver head 8, and the inner side of one end of the outer sleeve is also provided with a clamping member anti-backstop groove 15, the depth of the clamping member anti-backstop groove 15 towards the opening direction of the screwdriver head slot 7 is greater than that towards the bottom surface of the screwdriver head slot 7, the clamping member anti-backstop groove 15 towards the bottom surface of the screwdriver head slot 7 is in communication with the avoidance groove 14, and the inclined bottom surface of the clamping member anti-backstop groove 15 can tightly abut against the second clamping member 6 to keep it in the arc-shaped groove 13 on the circumferential outer side of the screwdriver head 8.

[0035] The opening direction of the screwdriver bit slot 7 is front, and the bottom direction of the screwdriver bit slot 7 is rear. During use, different specifications of screwdriver bits 8 are inserted into the opening end of the screwdriver bit slot 7 according to the use requirements. The opening end of the screwdriver bit slot 7 is a hexagonal hole matched with the shape of the screwdriver bit 8. During the insertion process of the screwdriver bit 8, the slide pin 2 is pushed backward, thereby compressing the inner elastic member 4. The first clamping member 5 exits from the first limiting groove 11 of the outer sleeve and enters the second limiting groove 12 of the slide pin 2. The outer sleeve moves backward under the elastic force of the outer elastic member 3, so that the first limiting groove 11 of the outer sleeve is misaligned with the first perforation 9 of the mandrel 1. Then, the inner side wall of the outer sleeve presses the first clamping member 5, and the slide pin 2 cannot slide and is kept in the compressed state of the inner elastic member 4. At the same time, the outer sleeve is kept in the backward position under the action of the outer elastic member 3. At this time, the clamping member anti-backstop groove 15 on one end of the outer sleeve is opposite to the second perforation 10 of the mandrel 1. The second clamping member 6 is kept clamped in the arc-shaped groove 13 of the screwdriver bit 8 under the pressure of the clamping member anti-backstop groove 15, thereby realizing the clamping and positioning effect of the screwdriver bit 8. At this time, normal screw locking operation can be performed;

[0036] When the screwdriver bit 8 is disassembled, the outer sleeve is pushed forward. At this time, the first limiting groove 11 of the outer sleeve is opposite to the first perforation 9 of the mandrel 1. The slide pin 2 slides forward a distance under the action of the inner elastic member 4. The first clamping member 5 exits from the second limiting groove 12 and enters the first limiting groove 11, and is kept in the first limiting groove 11 under the pressure of the guide groove 16. The first clamping member 5 blocks the inner side wall of the front end of the first limiting groove 11. The outer sleeve does not move backward after being released. The avoidance groove 14 at the front end of the outer sleeve is opposite to the second perforation 10. After the screwdriver bit 8 is moved forward a distance under the pressure of the slide pin 2, the second clamping member 6 is separated from the arc-shaped groove 13 on the screwdriver bit 8 and enters the avoidance groove 14 at the front end of the outer sleeve. At this time, the rear end of the screwdriver bit 8 is in the screwdriver bit slot 7 of the mandrel 1, but the screwdriver bit 8 is completely separated from the second clamping member 6 and can be easily taken out;

[0037] The outer sleeve only needs to be pushed by one hand during the installation and removal of the screwdriver head 8, without the need for two-handed operation, which is convenient and labor-saving. When the screwdriver head 8 is in a clamped normal working state, the second clamping part for clamping the screwdriver head 8 is located in the anti-back-off blocking groove 15 of the outer sleeve. Since the anti-back-off blocking groove 15 is a slope structure with a front end depth greater than a rear end depth, even if the chuck is shaken, the outer sleeve compresses the elastic member 3 to slide forward by a certain amplitude, and the second clamping part 6 slides in the anti-back-off blocking groove 15 from a deep end to a shallow end. At this time, the screwdriver head 8 is only clamped more tightly. At this time, the second clamping part 6 is clamped by the clamping friction force, and the outer sleeve cannot continue to slide forward. Therefore, the chuck will not loosen during use, but will only be clamped more tightly. Only after use, the operator provides a large forward pushing force to the outer sleeve, and the outer sleeve can overcome the friction force of the elastic member 3 and the second clamping part 6 to continue to move forward, thereby loosening the screwdriver head 8. The chuck realizes one-handed operation for installation and removal of the screwdriver head 8, and the screwdriver head 8 can maintain a stable clamped state in a normal working state, avoiding loosening of the screwdriver head 8 due to shaking of the chuck, ensuring smooth operation of the screw locking, and avoiding personnel injury and property loss during use.

[0038] The avoiding groove 14 structure at one end of the outer sleeve is formed as a slope with gradually decreasing depth towards the end of the anti-back-off blocking groove 15. The avoiding groove 14 of the outer sleeve is formed as a slope with gradually decreasing depth towards the end of the anti-back-off blocking groove 15, so that when the outer sleeve slides backward, the second clamping part 6 slides along the slope and gradually connects with the entrance of the anti-back-off blocking groove 15, thereby playing a guiding role and avoiding the second clamping part 6 being clamped on the stepped surface between the avoiding groove 14 and the anti-back-off blocking groove 15.

[0039] The avoiding groove 14 structure at one end of the outer sleeve is connected to the anti-back-off blocking groove 15 through a rounded arc surface or a chamfered slope. The slope of the avoiding groove 14 structure is connected to the anti-back-off blocking groove 15 through a rounded arc surface or a chamfered slope, which further ensures that the second clamping part 6 can smoothly enter the anti-back-off blocking groove 15 from the avoiding groove 14, and avoids being clamped during use.

[0040] The first clamping part 5 and the second clamping part 6 are both steel balls, and the second perforation 10 is formed as a neck structure with a size smaller than the diameter of the second clamping part 6 towards the end of the screwdriver head slot 7. In addition to using steel balls, the first clamping part 5 and the second clamping part 6 can also use a sliding pin 2, as long as it can be clamped by sliding the sliding pin 2 and the screwdriver head 8. Such equivalent replacement structures are easily thought of by those skilled in the art according to the present patent, and belong to the protection scope of the present patent.

[0041] The circumferential outer wall of the slide pin 2 is further provided with a radially inward recessed guide groove 16, which is communicated with the second limiting groove 12 at one end opening toward the opener head insertion slot 7, and the depth of the guide groove 16 is less than that of the second limiting groove 12, and the end of the first clamping piece 5 toward the mandrel 1 is always located in the guide groove 16 or the radially inward recessed groove structure.

[0042] The guide groove 16 and the limiting groove are optimally connected through a slope, and the first clamping piece 5 always slides in the guide groove 16 and the second limiting groove 12, so that the slide pin 2 can only slide in the opener head insertion slot 7 for a distance and cannot be separated from the opener head insertion slot 7, thereby playing a limiting role in the sliding distance of the slide pin 2. In addition to this limiting mode, a radially protruding structure can be provided on the side wall of the opener head insertion slot 7, and an axially extending sliding groove is provided on the side wall of the slide pin 2, and the slide pin 2 is guided and limited in the sliding groove through the radially protruding structure. Such equivalent replacement structures are easily thought of by those skilled in the art according to the present patent and belong to the protection scope of the present patent.

[0043] The end of the slide pin 2 toward the opening direction of the opener head insertion slot 7 is fixedly provided with a magnet 17, which can be magnetically attracted to the opener head 8 inserted into the opener head insertion slot 7. The end of the slide pin 2 toward the opening direction of the opener head insertion slot 7 is optimally provided with a magnet 17 mounting hole for fixedly embedding the magnet 17. The slide pin 2 moves forward to push the opener head 8 to move forward synchronously. After the opener head 8 is separated from the second clamping piece 6, it will not be separated from the opener head insertion slot 7 due to the magnetic attraction, thereby avoiding the opener head 8 from falling to the ground after the operation of the sleeve releasing the opener head 8, and improving the safety in use.

[0044] The inner side wall of the first limiting groove 11 on the inner side wall of the sleeve forms a slope structure toward the opening direction of the opener head insertion slot 7, and the slope structure near the end of the mandrel 1 is inclined toward the opening direction of the opener head insertion slot 7. The slope structure realizes guiding, so that the sleeve slides backward while pushing the first clamping piece 5 to smoothly exit the first limiting groove 11 and enter the second limiting groove 12.

[0045] The inner elastic member 4 is a compression spring, and the two ends of the elastic member in the elastic extension direction are tightly abutted against the bottom surface of the opener head insertion slot 7 and the end of the slide block toward the bottom surface of the opener head insertion slot 7, respectively.

[0046] The end of the slide pin 2 toward the bottom surface of the opener head insertion slot 7 is optimally formed with an elastic member insertion groove, and one end of the inner elastic member 4 is inserted into the elastic member insertion groove of the slide pin 2. In addition to the compression spring, other elastic materials such as elastic pads, elastic sheets, etc. or reverse setting tension springs, etc. can also be used.

[0047] The inner side of the outer sleeve is further formed with a radially inward recessed mounting groove 18, which forms an elastic member 3 mounting space with the outer side wall of the mandrel 1. The outer side wall of the mandrel 1 is provided with a snap spring 19 groove along the axial direction at the outer side of the elastic member 3 mounting space section. Two snap springs 19 are respectively clamped in the two snap spring 19 grooves on the outer side wall of the mandrel 1. A gasket 20 is further sleeved on the outer side wall of the mandrel 1, which is tightly clamped between the two snap springs 19. The elastic member 3 is a compression spring, and the two ends of the elastic member 3 in the elastic stretching direction are respectively tightly abutted against the gasket 20 and the surface of the mounting groove 18 on the inner side wall of the outer sleeve close to the side wall of the bottom surface of the screwdriver head insertion groove 7. The two snap springs 19 fix the gasket 20 to form a radially convex blocking structure on the outer side wall of the mandrel 1. This structure is simple and convenient to assemble, avoids complex processing and manufacturing of the mandrel 1, reduces production cost, saves materials consumed in processing of the mandrel 1, and the elastic member 3 can be other elastic materials or elastic sheets, etc.

[0048] The outer sleeve includes a front sleeve 21 and a rear sleeve 22. The rear sleeve 22 is sleeved on the outer side of the mandrel 1. One end of the front sleeve 21 is sleeved on the outer side of the mandrel 1, and the other end of the front sleeve 21 is sleeved on the outer side of the rear sleeve 22. The outer side wall of the rear sleeve 22 and the inner side wall of the other end of the front sleeve 21 are connected by a buckle structure 23. The first limiting groove 11 is formed in the inner side of the rear sleeve 22, and the avoidance groove 14 and the clamping member anti-retraction blocking groove 15 are respectively formed in the inner side of one end of the front sleeve 21. The outer sleeve is designed as a rear sleeve 22 and a front sleeve 21 split assembly structure, which improves the assembly convenience and reduces the overall processing cost of the outer sleeve. Of course, the outer sleeve can also be an integral structure, and such equivalent replacement structures can be easily thought of by those skilled in the art according to the present application, which belong to the protection scope of the present application.

Claims

1. A single hand operated quick release collet characterized by: The utility model relates to a spoon head inserting slot (7) is formed to the one end of the core axle, and the slide pin can be inserted in the spoon head inserting slot and slides along the axial direction, the opening end of the spoon head inserting slot can be inserted to the circumferential direction stop of the spoon head (8), the inner elastic piece provides the elastic retaining force of the slide pin to the opening direction of the spoon head inserting slot, and the slide pin axial sliding can push the spoon head to the opening direction of the spoon head inserting slot. The sidewall of the spoon head inserting slot is equipped with the first perforation (9) and the second perforation (10) that communicate with the inside of the spoon head inserting slot, the first clamping piece and the second clamping piece can be accommodated in the first perforation and the second perforation along the axial direction and set the distance respectively, and the first clamping piece and the second clamping piece respectively always extend the set length outside at least one end of the first perforation and the second perforation. The outer sleeve can be sleeved on the one end of the core axle along the axial direction and set the distance, the outer elastic piece provides the elastic retaining force of the outer sleeve to the bottom surface direction of the core axle, and the elastic force of the outer elastic piece is greater than the elastic force of the inner elastic piece, the inner sidewall of the outer sleeve is formed with a first limiting groove (11) that is radially concave, the circumferential outer sidewall of the slide pin is equipped with a second limiting groove (12) that is radially concave, the first limiting groove and the second limiting groove can be opposite to the first perforation respectively, the first clamping piece can enter the first limiting groove and be separated from the second limiting groove or the first clamping piece can enter the second limiting groove and be separated from the first limiting groove. The second perforation can be opposite to the arc-shaped groove (13) on the circumferential outer sidewall of the spoon head inserted in the spoon head inserting slot and communicate, and the second clamping piece can enter the arc-shaped groove on the circumferential outer sidewall of the spoon head and prevent the axial sliding of the spoon head. The one end of the outer sleeve is formed with an avoiding recess (14) that can be opposite to the second perforation and communicate, the second clamping piece can enter the avoiding recess and exit the arc-shaped groove on the circumferential outer sidewall of the spoon head, and the one end of the outer sleeve is also equipped with a clamping piece anti-retreating stop groove (15), the depth of the clamping piece anti-retreating stop groove towards the opening direction of the spoon head inserting slot one end is greater than the depth towards the bottom surface of the spoon head inserting slot one end, the clamping piece anti-retreating stop groove towards the bottom surface of the spoon head inserting slot one end communicates with the avoiding recess, and the inclined bottom surface of the clamping piece anti-retreating stop groove can be tightly abutted with the second clamping piece to keep it in the arc-shaped groove on the circumferential outer side of the spoon head. The avoiding recess structure of the one end of the outer sleeve gradually becomes shallow in depth towards the one end of the clamping piece anti-retreating stop groove.

2. The one-hand operation quick release collet chuck according to claim 1, characterized in that: The avoiding recess structure of the one end of the outer sleeve and the clamping piece anti-retreating stop groove are connected through a round corner arc surface or a chamfered inclined surface.

3. The one-hand operation quick release collet chuck according to claim 1 or 2, characterized in that: The first clamping piece and the second clamping piece are both steel balls, and the second perforation is formed with a necked structure towards the one end of the spoon head inserting slot, and the size of the necked structure is smaller than the diameter of the second clamping piece.

4. The one-hand operation quick release collet chuck according to claim 1, characterized in that: The circumferential outer sidewall of the slide pin is also equipped with a radially concave guide groove (16), the one end of the guide groove towards the opening direction of the spoon head inserting slot communicates with the second limiting groove, and the depth of the guide groove is smaller than the depth of the second limiting groove, and the one end of the first clamping piece towards the direction of the core axle is always located in the guide groove or the radially concave groove structure.

5. The one-hand operation quick release collet chuck according to claim 1 or 4, characterized in that: ​ 6. The one-hand operation quick release collet chuck according to claim 1, characterized in that: The sliding pin is fixed with a magnet (17) at one end thereof facing the direction of the opening of the slot of the opener head, and the magnet can be attracted to the opener head inserted into the slot of the opener head.

7. The one-hand operation quick release collet chuck according to claim 1, characterized in that: The first limiting groove on the inner side wall of the outer sleeve is formed with a slope structure facing the inner side wall of the opening direction of the slot of the opener head, and the slope structure is inclined towards the opening direction of the slot of the opener head near one end of the mandrel.

8. The one-hand operation quick release collet chuck according to claim 1, characterized in that: The inner elastic member is a compression spring, and the two ends of the elastic extension direction of the spring are respectively tightly abutted against the bottom surface of the slot of the opener head and one end of the sliding block facing the bottom surface of the slot of the opener head.

9. The one-hand operation quick release collet chuck according to claim 1, characterized in that: The inner side of the outer sleeve is further formed with a radially inward recessed mounting groove (18), and the mounting groove and the circumferential outer side wall of the mandrel form an outer elastic member mounting space, the circumferential outer side wall of the mandrel located in the outer elastic member mounting space segment is spaced along the axial direction and is provided with snap spring grooves, two snap springs (19) are respectively clamped in the two snap spring grooves on the circumferential outer side wall of the mandrel, and the circumferential outer side of the mandrel is further sleeved with a gasket (20), the gasket is tightly clamped between the two snap springs, and the outer elastic member is a compression spring, and the two ends of the elastic extension direction of the spring are respectively tightly abutted against the surface of the gasket and the surface of the mounting groove on the inner side wall of the outer sleeve near the side wall of the bottom surface of the slot of the opener head.

10. The one-hand operation quick release collet chuck according to claim 1 or 9, characterized by: The outer sleeve comprises a front sleeve (21) and a rear sleeve (22), the rear sleeve is sleeved on the circumferential outer side of the mandrel, one end of the front sleeve is sleeved on the circumferential outer side of the mandrel, the other end of the front sleeve is sleeved on the circumferential outer side of the rear sleeve, the outer side wall of the rear sleeve and the inner side wall of the other end of the front sleeve are connected through a buckle structure (23), the first limiting groove is formed on the inner side of the rear sleeve, and the avoiding groove and the clamping member anti-retreating stop groove are respectively formed on the inner side of one end of the front sleeve.

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