JP3067729U - Auto-lock type chuck - Google Patents

Abstract

(57) [Problem] To provide a chuck capable of automatically locking a work without using another tool. SOLUTION: This is an auto-lock type chuck for connecting a power tool 100 and a work, wherein a female screw thread 111 is formed at an inner peripheral portion at one end and a plurality of guide grooves 141 are formed at an outer peripheral portion at the other end. Is formed, the operating claw 20 which slides inside the guide groove 141 and has a thread 22 on one surface, a rotation knob 30 which is screwed with the thread 22 of the operation claw 20, and a rotation knob. An annular body 40 provided on the rotary body 30 and rotatable together with the rotary knob 30, and at least one first extending body provided on the annular body 40 so as to extend in the center direction.
A knock ring 51 having convex teeth 42, second convex teeth 52 that can contact the first convex teeth 42, and a spring 54 for urging the knock ring 51 are provided.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an auto-locking type chuck.

[0002]

[Prior art]

 Conventional chucks require that a workpiece (eg, a drill) be fastened to the chuck using another tool.

[0003]

[Problems to be solved by the invention]

 However, it was troublesome to sequentially tighten the work to the chuck when using the work. Therefore, an object of the present invention is to provide a chuck that can automatically lock a workpiece without using another tool.

[0004]

[Means for Solving the Problems]

 According to the present invention, there is provided an auto-locking type chuck for connecting a power tool and a work, wherein an internal thread at one end is provided. A rod having a plurality of guide grooves formed on the outer periphery of the other end, an operating claw that slides inside the guide groove and has a thread on one surface, and a thread of the operating claw A rotary knob screwed into the rotary knob, an annular body provided on the rotary knob and rotatable together with the rotary knob, at least one first convex tooth provided on the annular body so as to extend in the center direction, A knock ring having second convex teeth that can contact the convex teeth and a spring that biases the knock ring are provided.

[0005]

[Embodiment of the invention]

 Hereinafter, a plurality of examples showing an embodiment of the present invention will be described with reference to the drawings. First Embodiment As shown in FIGS. 1 and 3, a female thread 111 is formed on an inner peripheral portion of one end of a rod 10. The rod 10 is fastened to the center shaft 12 of the power tool 100 via the female thread 111. The power tool 100 is provided with at least one tightening unit 101. Three guide grooves 141 are formed in the outer periphery of the other end 14 of the rod 10. Since the convex ring 13 provided at the intermediate portion of the rod 10 has three through holes 131 communicating with the guide grooves 141, the operating claw 20 can slide. A thread 22 is formed on one surface of the operating claw 20. The thread 22 is screwed into a female thread 31 formed on the inner periphery of the rotary knob 30. The other surface 21 of the operation claw 20 can hold the work 90 therebetween.

The rotation knob 30 has a concave groove 34 and convex teeth 33 on the outside. At one end 32 of the rotary knob 30, two bearings 132 and 133 are sequentially installed. When the rotation knob 30 rotates relative to the rod 10 or the operating claw 20, the operating claw 20 can move relative to the rod 10, so that the work 90 can be pinched or separated.

The shell 60 has at least one guide groove 62 and a through hole 63. The shell 60 is attached so as to cover the rod 10 from the other end of the rod 10. The cover 64 is mounted on the shell 60 using a snap ring.

The annular body 40 has at least one foot 41 formed thereon, and can not only slide within the concave groove 34 of the rotation knob 30 but also rotate with the rotation knob 30. The annular body 40 extends in the center direction and is provided with at least one first convex tooth 42.

The knock ring 51 has at least one key 53 and can slide not only inside the guide groove 62 of the shell 60 but also with the shell 60. The knock ring 51 has at least one second convex tooth 52. When the knock ring 51 and the shell 60 rotate with respect to the annular body 40, the second convex teeth 52 of the knock ring 51 intermittently knock the annular body 40 by the action of the first convex teeth 42 of the annular body 40. I do.

The spring 54 is provided between the cover 64 and the knock ring 51, and urges the knock ring 51 toward the annular body 40.

When the rod 10 and the operating claw 20 rotate at a high speed by driving the power tool 100, the operating claw 20 rotates relative to the rotary knob 30 due to inertial force. Subsequently, the operation claw 20 is driven, and the work is grasped until the rotation knob 30 grasps the operation claw 20. At this time, the rotation knob 30, the annular body 40, the knock ring 51 and the shell 60 are connected, and the work 90 is driven and rotated.

As shown in FIG. 4, when the user grasps the shell 60 by hand, the knock ring 51 intermittently hits the spring due to the action of the second convex teeth 52 and the first convex teeth 42, Since the annular body 40 is knocked, the work is driven intermittently and strongly.

The socket 70 having the through hole 71 has at least one convex rib 72 on an inner peripheral portion, and is fitted to the other end 14 of the rod 10. A partition ring 55 is provided between the socket 70 and the rotary knob 30. As shown in FIG. 2, the socket 70 is provided with a convex ring 75 for locking the shell 60. Further, as shown in FIG. 5, the socket 70 has at least one cutout surface 73 and a fitting hole 74, so that the socket 70 can be engaged with the handle 92. When another tool 91 is inserted through the through hole 63 of the shell 60 and fitted into the concave groove 34 of the rotary knob 30, the handle 92 drives the socket 70 and the rod 10 and rotates with the rotary knob 30. Therefore, the operation claw 20 is loosened, and the work 90 can be released.

Second Embodiment As shown in FIGS. 6 and 9, a locking ring 82 is provided between a rotating ring 81 and a rotating cover 83. As shown in FIG. 7, the rotating ring 81 is provided with an annular edge 88, which locks the convex ring 75 of the socket 70 while rotating. The rotating ring 81 has at least one inclined surface 811, two convex portions 812 and 813, and one through hole 814. As shown in FIG. 5, the tool 91 is inserted into the through hole 814.

The locking ring 82 locks the knock ring 51 at an annular edge 821. Further, since the locking ring 82 is provided with at least a convex portion 822 and each has one concave groove 823, when the convex portions 812 and 813 are inserted into the concave groove 823, the locking ring 82, the rotating ring 81 and Is determined.

The rotating cover 83 has at least one fitting groove 832 that fits with the snap ring 831. The rotating cover 831 is mounted on the rod 10 using a snap ring 831 so as to be rotatable. The guide block 84 is provided with a guide groove 841 so as to match and slide with the key 53 of the knock ring 51.

The retaining ring 85 is provided with at least one stopper 851. As shown in FIG. 7, the retaining ring 85 is inserted into the guide groove 837 of the rotating cover 83, and can relatively rotate with the rotation of the rotating cover 83. The retaining ring 85 is provided with at least one pair of feet 852, and each of the feet 852 is formed with a concave groove 853. The rotating cover 83 is fastened to the power tool 100 by the action force of the spring 54.

As shown in FIG. 7, during operation, the rotating ring 81 rotates together with the locking ring 82, and the inclined surface 811 of the rotating ring 81 separates the knock ring 51 from the annular body 40. The body 40 is not activated. On the other hand, when the rotating ring 81 rotates in the opposite direction together with the locking ring 82, the annular body 40 operates by the action of the spring 54.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating an auto-locking type chuck according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a socket of the self-locking type chuck according to the embodiment of the present invention;

FIG. 3 is a sectional view showing an auto-locking type chuck according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view illustrating an auto-locking type chuck according to an embodiment of the present invention;

FIG. 5 is an explanatory view showing the operation of the auto-locking type chuck according to the embodiment of the present invention;

FIG. 6 is an exploded view showing an auto-locking type chuck according to an embodiment of the present invention;

FIG. 7 is a cross-sectional view illustrating an auto-locking type chuck according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view illustrating an auto-locking type chuck according to an embodiment of the present invention.

FIG. 9 is a cross-sectional view illustrating an auto-locking type chuck according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rod 20 Working claw 22 Thread 30 Rotation knob 40 Annular body 42 First convex tooth 51 Knock ring 52 Second convex tooth 54 Spring 62 Guide groove 100 Power tool 111 Female thread 141 Guide groove

Claims (1)

[Utility model registration claims] 1. An auto-locking type chuck for connecting a power tool and a work, wherein a female thread is formed on an inner peripheral portion at one end, and a plurality of guide grooves are formed on an outer peripheral portion at the other end. An operating claw that slides inside the guide groove and has a thread on one surface thereof; a rotation knob that is screwed with the thread of the operation claw; and An annular body rotatable together with a rotation knob, at least one first convex tooth provided in the annular body so as to extend in the center direction, and a second convex tooth that can contact the first convex tooth. An auto-locking chuck comprising: a knock ring; and a spring for urging the knock ring.