[0018] Embodiment: A single-hand quick release chuck, comprising a mandrel 1, a ball 2, a sliding pin 3, an outer sleeve 4, a retaining ring 5 and an abutting member. One end of the mandrel 1 forms an axial non-circular insert Slot 6, the mandrel 1 is located on the side wall of the slot 6 with at least one elongated radial perforation 7 extending in the axial direction and at least one radial groove 8. The bottom surface of the slot 6 is recessed to form a circle Slot 9, the sphere 2 can be slidably accommodated in the radial perforation 7 of the mandrel 1 along the extending direction of the radial perforation 7, the sphere 2 can be partially exposed into the slot 6, and the sphere 2 cannot completely fall into the slot 6 , The abutment member is positioned in the radial groove 8 of the mandrel 1, one end of the abutment member elastically protrudes into the slot 6, and the abutment member will not completely fall into the slot 6, the sliding pin 3 axis The sliding pin 3 can be inserted into the circular groove of the mandrel 1 to a set distance slidably, one end of the sliding pin 3 can be elastically extended into the slot 6 of the mandrel 1, and the outer sleeve 4 can be elastically slid and set in the axial direction Outside the circumference of the mandrel 1, a stepped hole with one end smaller than the inner diameter of the other end is formed on the inner side of the outer sleeve 4. The surface of the ball 2 facing away from the slot 6 abuts against the side wall of the stepped hole of the outer sleeve 4. The retaining ring 5 is between the outer diameter of the outer sleeve 4. Between the large end and the mandrel 1, the retaining ring 5 elastically abuts the outer surface of the sphere 2 along the radial perforation 7 of the mandrel 1, and the sphere 2 is subjected to the elastic resistance of the retaining ring 5 to always partially extend the retainer In the internal state of the socket 6, when the screwdriver head is inserted into the socket 6, it cannot be rotated by the shape of the socket 6, and the ball 2 will automatically sink into the dent on the side wall of the screwdriver head under the elastic force of the retaining ring 5. Since the outside of the sphere 2 is pressed by the small diameter end of the outer sleeve 4 and cannot move outward, the screwdriver head is stuck. When you need to pull out the screwdriver head, you only need to pull the outer sleeve 4 outward. The ball 2 corresponds. At this time, the screwdriver head is automatically ejected out by the elastic force of the sliding pin 3, and the ball 2 is squeezed by the screwdriver head to avoid outward, and the screwdriver head is separated from the ball 2 and blocked by the frictional action of the abutment member. , The abutment piece can be elastically extended into the pit on the side wall of the screwdriver head, so that the screwdriver head cannot be completely ejected when it is ejected. It is stuck by the abutment piece and will not fall. At this time, it can be easily held by hand Take off the screwdriver head, and when the tightening piece is pulled by the external force, the screwdriver head can be pressed back elastically by the side wall of the screwdriver head, and the screwdriver head can be taken off. The structure is simple, and the screwdriver head will not fall when it is withdrawn, so as to prevent the screwdriver head from falling and breaking , At the same time, avoid repeated picking, easy to use, and can be operated with one hand.
[0019] The abutting member is a ball 10, the opening of the radial groove 8 facing the slot 6 forms a retracted structure with a diameter smaller than that of the ball 10, and the ball 10 can partially protrude from the opening of the retracted structure of the radial groove 8. In the slot 6, an elastic member 15 is provided at the bottom of the radial groove 8. The elastic member 15 always abuts the ball 10 back to the outer side of the slot 6. When the screwdriver head pops out, the ball 10 is just under the elastic force of the elastic member 15. Sliding into the inner pit on the side wall of the screwdriver head, the ball 10 is stuck with the inner pit on the side wall of the screwdriver head, and the screwdriver head cannot move forward and stops in the chuck. This structure effectively prevents the screwdriver head from falling when it exits, and the structure is simple , Easy to use, the smooth surface of the ball 10 will not affect the normal insertion and withdrawal of the screwdriver head.
[0020] A set gap is formed between the small diameter end of the outer sleeve 4 and the mandrel 1, the radial groove 8 of the mandrel 1 is an inertia hole, and the elastic member 15 is an elastic sleeve 11 sleeved outside the circumference of the mandrel 1. The inner surface of the elastic sleeve 11 just completely covers the through hole, the inner surface of the elastic sleeve 11 always abuts against the outer surface of the ball 10 facing away from the socket 6, the elastic sleeve 11 realizes the elastic pressing of the ball 10, the structure is simple and easy to manufacture For assembling, the elastic sleeve 11 generally uses spring 13 pieces, of course, the spring 13 can also be arranged in the radial groove 8.
[0021] A ring of annular grooves is formed outside the circumference of the mandrel 1, the through hole is located in the annular groove, the elastic sleeve 11 is positioned in the annular groove, and the annular groove limits the elastic sleeve 11 Position function to prevent the elastic sleeve 11 from shifting.
[0022] An inner sleeve 12 is also provided. The inner sleeve 12 is located between the outer sleeve 4 and the mandrel 1. The inner sleeve 12 is fixedly arranged inside the opening at one end of the outer sleeve 4 with a large diameter. A spring 13 is also provided, which is sleeved on the mandrel. 1 Outside, and the two ends of the spring 13 are respectively pressed against the inner sleeve 12 and the retaining ring 5, the inner sleeve 12 and the spring 13 realize the elastic tightness of the retaining ring 5. When the screwdriver bit is inserted into the slot 6 of the mandrel 1, no hands are required Pulling out the jacket 4, the stop ring 5 can push the ball 2 to jam the inner recess of the screwdriver head by itself, and easily complete the connection of the mandrel 1 and the screwdriver head. Since the ball 2 is pushed by the elastic force of the stop ring 5, it can be smoothly pushed. The wall surface of the radial perforation 7 forms the effect of automatically walking along the axial direction, so there is no need to retract the outer casing 4 during insertion, so that the workpiece can be inserted into the holding device, and the use of the outer casing 4 can be reasonably reduced. The structure is ingenious and convenient Assembly.
[0023] The inner wall of the stop ring 5 facing the opening of the outer sleeve 4 with a smaller diameter is a spherical surface that matches the outer surface of the sphere 2, and the inner side wall of the opening of the outer sleeve 4 with a larger diameter is formed with a ring of annular recessed grooves. A circle of inclined convex surfaces with one end diameter smaller than the other end diameter, the inclined convex surface just extends into the annular recessed groove of the outer sleeve 4. The retaining ring 5 achieves perfect contact with the sphere 2 through the spherical surface to avoid damage to the sphere 2 , The inner sleeve 12 is fixedly engaged with the outer sleeve 4 through the inclined protrusions, which is convenient for assembly.
[0024] The structure in which one end of the sliding pin 3 can elastically extend into the slot 6 of the mandrel 1 is as follows: a sliding pin retaining ring 14 is fixedly arranged on the inner side of the slot 6 facing the circular groove 9 and the inner diameter of the sliding pin retaining ring 14 Smaller than the inner diameter of the circular groove 9, the sliding pin 3 is a T-shaped structure with one end diameter smaller than the other end diameter. The end with the larger diameter is always located in the circular groove 9, and the annular step surface formed between its two ends just stops at On the end surface of the sliding pin retaining ring 14, an elastic member 15 is arranged in the circular groove 9. The two ends of the elastic member 15 are respectively pressed against the bottom surface of the circular groove 9 and the end surface with a larger diameter of the sliding pin 3. The sliding pin 3 is realized by the elastic member 15. Accumulates the elastic force when the screwdriver bit is withdrawn, the structure is simple, and the assembly is convenient.
[0025] A concave positioning groove is formed on the end surface of one end of the sliding pin 3 with a large diameter. One end of the elastic member 15 is inserted into the concave positioning groove and abuts against the bottom surface of the concave positioning groove. The piece 15 plays a role of guiding and limiting to prevent the deformation of the elastic piece 15 from affecting the sliding pin 3 to eject the driver head smoothly.
[0026] A non-slip sleeve 16 is also provided on the outer side wall of the jacket 4.
[0027] The slot 6 on the inner side of one end of the mandrel 1 is one of a hexagonal slot, an octagonal slot, a square slot, a triangular slot, and a quincunx slot.
