JP2009226531A - Chuck handle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a chuck handle capable of stabilizing its posture with respect to a tool chuck. <P>SOLUTION: A chuck handle includes: a handle shaft; a gear provided on a tip end of the handle shaft; a flame for rotatably supporting the handle shaft; and a lock pin formed in the flame. In this chuck handle, the lock pin is inserted into a handle hole of a tool chuck, then the flame abuts on a body side face of the tool chuck, and the gear is engaged with a fastening sleeve of the tool chuck. At this time, at least a part of a range, in which the flame abuts on the body side face of the tool chuck, is positioned within an angle range of less than 180 degrees backward in a rotating direction of the fastening sleeve, with respect to a position where the lock pin is inserted into the handle hole. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a chuck handle for a tool chuck.

A tool chuck for fixing a rotary tool such as a drill is known. Various types of tool chucks have been developed. Among them, many tool chucks that are operated using a chuck handle are used. This type of tool chuck includes a main body into which a rotary tool is inserted, a tightening sleeve rotatably provided on the main body, and a plurality of claws that move in the radial direction within the main body as the tightening sleeve rotates. ing. A handle hole into which the chuck handle is inserted is formed on the side surface of the main body, and a gear portion that engages with the chuck handle is formed on the fastening sleeve.
Patent Document 1 discloses a chuck handle. The chuck handle disclosed in Patent Document 1 includes a handle shaft and a gear provided on the handle shaft. A support pin is formed at the tip of the handle shaft. In this type of chuck handle, the user inserts the support pin at the tip of the handle shaft into the handle hole, engages the gear provided on the handle shaft with the gear portion of the tightening sleeve, and rotates the handle shaft. Rotate the clamping sleeve. When the clamping sleeve is rotated in one direction, the tool chuck can be tightened, and when the clamping sleeve is rotated in the other direction, the tool chuck can be loosened.

Japanese Utility Model Publication No. 7-17404

In the conventional chuck handle, the posture of the tool chuck tends to become unstable when the tool chuck is tightened or loosened. Therefore, with the conventional chuck handle, it is very difficult to tighten the tool chuck strongly or loosen the strongly tightened tool chuck.
The present invention solves the above problems. The present invention realizes a chuck handle that is stable in posture with respect to a tool chuck and easy to operate the tool chuck.

A chuck handle for a tool chuck embodied by the present invention includes a handle shaft, a gear provided at a tip of the handle shaft, a frame that rotatably supports the handle shaft, and a latch formed on the frame. Has a pin.
When the chuck handle is attached to the tool chuck, the locking pin is inserted into a handle hole formed on the side surface of the main body of the tool chuck, the frame abuts on the side surface of the main body of the tool chuck, and the gear is connected to the tool chuck. It engages with a gear portion formed on the fastening sleeve. At this time, at least a part of the range in which the frame abuts on the side surface of the main body of the tool chuck is 180 degrees backward with respect to the direction in which the fastening sleeve is rotated with respect to the position where the locking pin is inserted into the handle hole. It is located within an angle range of less than.

When the clamping sleeve is rotated by the handle shaft, the chuck handle receives a reaction force from the clamping sleeve. A rotational torque acts on the chuck handle that has received the reaction force around the position where the locking pin is inserted into the handle hole. In the conventional chuck handle, the posture of the chuck handle becomes unstable due to this rotational torque.
On the other hand, in the chuck handle according to the present invention, the frame abuts against the side surface of the main body of the tool chuck. Then, at least a part of the contact range is located within an angle range (within a half circumference range) of less than 180 degrees rearward with respect to the rotation direction of the fastening sleeve with respect to the insertion position of the locking pin. In this case, when the rotational torque described above acts on the chuck handle, the frame is strongly pressed against the side surface of the main body of the tool chuck, and the chuck handle is fixed to the tool chuck.
According to the chuck handle according to the present invention, the chuck handle 10 is firmly fixed to the tool chuck 60 as the tool chuck is tightened more strongly. Even when the tool chuck is strongly tightened or the tool chuck that is strongly tightened is loosened, the posture of the chuck handle is not likely to become unstable.

In the chuck handle described above, at least a part of the range in which the frame abuts the side surface of the main body of the tool chuck is a rear side with respect to the direction in which the tightening sleeve is rotated with respect to the position where the locking pin is inserted into the handle hole. It is preferably located within an angular range of 90 degrees or more and less than 180 degrees.
According to this configuration, when the chuck handle receives the rotational torque caused by the reaction force, the frame is strongly pressed against the side surface of the main body of the tool chuck, and the locking pin is difficult to be removed from the handle hole.

In the chuck handle described above, the position where the gear engages with the gear portion of the tightening sleeve is positioned so that the locking pin is inserted into the handle hole than the range where the frame abuts against the side surface of the main body of the tool chuck. On the other hand, it is preferable that they are located apart.
The greater the distance between the position where the locking pin is inserted into the handle hole and the position where the gear engages with the gear portion of the tightening sleeve, the greater the force acting on the chuck handle due to the reaction force from the tightening sleeve. The rotational torque is increased. In this case, the posture of the chuck handle becomes more stable when the frame is strongly pressed against the side surface of the main body of the tool chuck.

  Therefore, the position where the gear engages with the gear portion of the tightening sleeve is a position 180 degrees away from the position where the locking pin is inserted into the handle hole in the rearward direction with respect to the direction in which the tightening sleeve is rotated. Since both are in the most distant positional relationship, the posture of the chuck handle can be firmly stabilized.

It is preferable that the contact surface that contacts the side surface of the main body of the tool chuck of the frame is an arc surface that curves along the main body side surface of the tool chuck.
In this case, the contact surface of the frame is firmly pressed against the side surface of the main body of the tool chuck, and the posture of the chuck handle becomes more stable.

  According to the chuck handle of the present invention, even when the tool chuck is strongly tightened or the strongly tightened tool chuck is loosened, the posture with respect to the tool chuck is stabilized, so that the tool chuck can be easily operated.

First, the main features of the embodiments described below are listed.
(Mode 1) The handle shaft is provided with a main shaft provided with a gear at the tip thereof and a grip provided near the base end of the main shaft. The grip extends radially outward from the main shaft.
(Mode 2) The frame is provided with a contact surface for contacting the side surface of the chuck body. The contact surface is curved along the side surface of the chuck body, and a part of the contact surface is 90 degrees or more away from the locking pin in the circumferential direction of the tool chuck.
(Mode 3) The contact surface of the frame extends in an arc shape over an angle range of 90 degrees or more from the position facing the gear provided on the handle shaft toward the gear.

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing a chuck handle 10 of the embodiment. FIG. 2 is a right side view showing the chuck handle 10. The chuck handle 10 is for operating a tool chuck such as a portable power tool, and is attached to and detached from the tool chuck.
As shown in FIGS. 1 and 2, the chuck handle 10 includes a handle shaft 12, a bevel gear 18, a frame 20, and a locking pin 26. As shown in FIG. 2, the chuck handle 10 has a shape that is symmetric when viewed from the side.
The handle shaft 12 includes a main shaft 14 and a grip 14 provided at the base end (upper end in the drawing) of the main shaft 14. The grip 14 is provided so as to be substantially orthogonal to the handle shaft 12. The handle shaft 12 is configured so that a user can grip and rotate the proximal end side thereof. A straight line H in the figure indicates the rotation axis of the handle shaft 12 (that is, the central axis of the main shaft 14).

  The bevel gear 18 is provided at the front end (lower end in the figure) of the handle shaft 12. The bevel gear 18 is provided coaxially with the main shaft 14 of the handle shaft 12 and is fixed to the main shaft 14 of the handle shaft 12 so as not to be relatively rotatable. The bevel gear 18 rotates together with the handle shaft 12 about the rotation axis H.

The frame 20 mainly includes a substantially L-shaped main frame 22 and a substantially C-shaped contact frame 24. One end of the main frame 22 rotatably supports the main shaft 14 of the handle shaft 12. A contact frame 24 is fixed to the other end of the main frame 22. The contact frame 24 is provided with a contact surface 24a on the inner peripheral side thereof. The contact surface 24 a is an arc surface (a part of a cylindrical surface) that is curved in an arc shape, and the center axis G thereof is located on an extension line of the rotation axis H of the bevel gear 18. The radius of curvature of the contact surface 24a is matched to the radius of a chuck main body 62 (see FIGS. 3, 4, and 5) of the tool chuck 60 described later, and is curved along the side surface 62b of the chuck main body 62. ing. The contact surface 24a extends from a position facing the bevel gear 18 (that is, on an extension line of the rotation axis H of the handle shaft 12) over an angle range of 145 degrees.
The locking pin 26 is provided on the contact surface 24a and protrudes toward the central axis G of the contact surface 24a. The locking pin 26 of the present embodiment is provided at a position facing the bevel gear 18 (that is, on an extension line of the rotation shaft H of the handle shaft 12), and protrudes toward the bevel gear 18.

  A state in which the chuck handle 10 is attached to the tool chuck 60 will be described with reference to FIGS. 3, 4, and 5. FIG. 3 shows how the chuck handle 10 is attached to the tool chuck 60. 4 and 5 show a front view and a side view of the chuck handle 10 attached to the tool chuck 60, respectively. Note that the chuck handle 10 is attached to the tool chuck 60 differently when the tool chuck 60 is tightened and when the tool chuck 60 is loosened. 3, 4, and 5, the chuck handle 10 is illustrated in the mounting posture when the tool chuck 60 is tightened.

  Here, before describing the chuck handle 10, the configuration of the tool chuck 60 will be briefly described. As shown in FIGS. 3, 4, and 5, the tool chuck 60 has a general-purpose structure that can be operated by a conventional chuck handle. As shown in FIGS. 3, 4, and 5, the tool chuck 60 includes a chuck body 62 into which a rotary tool 80 such as a drill is inserted, a fastening sleeve 64 that is rotatably provided on the chuck body 62, A plurality of claws 66 are provided that move in the radial direction within the chuck body 62 as the attaching sleeve 64 rotates. A handle hole 62a into which a conventional chuck handle is inserted is formed in the side surface 62b of the chuck body 62. The fastening sleeve 64 is formed with a gear portion 64a that engages with a conventional chuck handle.

  As shown in FIG. 3, when the chuck handle 10 is attached to the tool chuck 60, first, the locking pin 26 is inserted into the handle hole 62a. Next, the chuck handle 10 is rotated with the locking pin 26 as a fulcrum, the contact surface 24a of the frame 20 is brought into contact with the side surface 62b of the chuck body 62, and the bevel gear 18 is engaged with the gear portion 64a of the fastening sleeve 64. . Thereby, the chuck handle 10 can be attached to the tool chuck 60.

  4 and 5, in the chuck handle 10 attached to the tool chuck 60, the locking pin 26 is inserted into the handle hole 62a, the contact surface 24a of the frame 20 contacts the side surface 62b of the chuck body 62, The bevel gear 18 engages with the gear portion 64 a of the fastening sleeve 64. Here, the position where the locking pin 26 is inserted into the handle hole 62 a, a part of the range where the contact surface 24 a abuts the side surface 62 b of the chuck body 62, and the bevel gear 18 are engaged with the gear portion 64 a of the fastening sleeve 64. The matching positions are different from each other with respect to the circumferential direction of the tool chuck 60.

  As shown in FIG. 6, when the handle shaft 12 is rotated in the A direction with the chuck handle 10 attached to the tool chuck 60, the clamping sleeve 64 is rotated in the B direction, and the tool chuck 60 is tightened. At this time, the bevel gear 18 of the chuck handle 10 receives a reaction force from the fastening sleeve 64 in the C direction. When the bevel gear 18 receives a reaction force in the C direction, rotational torque about the locking pin 26 acts on the chuck handle 10. With this rotational torque, the contact surface 24 a of the frame 20 is pressed against the side surface 62 b of the chuck body 62 in the D direction. As a result, the chuck handle 10 is firmly fixed to the chuck body 62. That is, in the chuck handle 10, the locking pin 26 and the contact surface 24 a exhibit the same function as the key spanner, and the chuck handle 10 is fixed to the tool chuck 60 by the reaction force received by the bevel gear 18.

In particular, in the chuck handle 10 of the present embodiment, the contact surface 24a formed on the frame 20 extends from the position of the locking pin 26 in an angle range of about 145 degrees. Therefore, a part of the range in which the contact surface 24a abuts on the side surface 62b of the chuck body 62 is a direction in which the fastening sleeve 64 is rotated with respect to the position where the locking pin 26 is inserted into the handle hole 62a (B With respect to (direction), it is located in an angle range of 90 degrees or more and less than 180 degrees backward. In this case, the pressing force by which the contact surface 26a of the frame 20 is strongly pressed against the side surface 62b of the chuck body 62 with respect to the rotational torque acting on the chuck handle 10 is increased, and the posture of the chuck handle 10 is further stabilized.
Further, in the chuck handle 10 of the present embodiment, the locking pin 26 and the bevel gear 18 are provided at positions facing each other. Therefore, the position where the bevel gear 18 is engaged with the gear portion 64a of the tightening sleeve 64 with respect to the position where the locking pin 26 is inserted into the handle hole 62a is the direction in which the tightening sleeve 64 is rotated (direction B). ) At a position 180 degrees away from the rear side. That is, the engagement position of the bevel gear 18 and the insertion position of the locking pin 26 are in the most distant positional relationship. In this case, the rotational torque (force indicated by arrow C) acting on the chuck handle 10 is greater than the reaction force (force indicated by arrow B) received by the chuck handle 10 from the fastening sleeve 64. As a result, the contact surface 26a of the frame 20 is strongly pressed against the side surface 62b of the chuck body 62, and the posture of the chuck handle 10 is firmly stabilized.

Next, a case where the tool chuck 60 is loosened will be described. As shown in FIG. 7, when the tool chuck 60 is loosened, the chuck handle 10 is mounted with its posture reversed left and right. When the handle shaft 12 is rotated in the P direction, the tightening sleeve 64 is rotated in the Q direction, and the tool chuck 60 is loosened. At this time, the bevel gear 18 of the chuck handle 10 receives a reaction force in the R direction from the fastening sleeve 64. When the bevel gear 18 receives a reaction force in the R direction, rotational torque about the locking pin 26 acts on the chuck handle 10. Due to this rotational torque, the contact surface 24 a of the frame 20 is strongly pressed in the S direction against the side surface 62 b of the chuck body 62. Thereby, the chuck handle 10 is firmly fixed to the chuck body 62.
According to the chuck handle 10 of the present embodiment, the chuck handle 10 is more firmly fixed to the tool chuck 60 as the tool chuck 60 that is strongly tightened is loosened. For this reason, the posture of the chuck handle 10 does not become unstable even when the tool chuck 60 that is strongly tightened is loosened.

  6 and 7, when the tool chuck 60 is tightened and when the tool chuck 60 is loosened, the mounting posture of the chuck handle 10 is opposite to the left and right. That is, when the tool chuck 60 is tightened (FIG. 6), the contact surface 24a is positioned counterclockwise with respect to the locking pin 26, and when the tool chuck 60 is loosened (FIG. 7), the locking pin 26 is positioned. The contact surface 24a is positioned in the clockwise direction. The direction in which the contact surface 24a should be located is related to the directions B and Q in which the fastening sleeve 64 is rotated. Specifically, when the tool chuck 60 is tightened, the tool chuck 60 is rotated clockwise, so that the contact surface 24a is positioned in the counterclockwise direction. On the other hand, when the tool chuck 60 is loosened, the tool chuck 60 is rotated counterclockwise, so that the contact surface 24a is positioned in the clockwise direction. That is, in any of the operations, the tightening sleeve 64 is rotated so that the contact surface 24a contacts the side surface 62b of the chuck body 62 with respect to the position where the locking pin 26 is inserted into the handle hole 62a. With respect to the directions B and Q to be moved, they are positioned in an angle range of 180 degrees backward (within a half-circumference range).

Specific examples of the present invention have been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.
The technical elements described in this specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings achieves a plurality of objects at the same time, and has technical utility by achieving one of the objects.

The front view which shows a chuck | zipper handle. The right view which shows a chuck handle. Front view showing the chuck handle attached to the tool chuck (when tightening). Right side view showing the chuck handle attached to the tool chuck (when tightening). The figure which shows a mode that a chuck handle is attached to a tool chuck (at the time of clamping). The figure which shows the force which acts on a chuck handle (when tightening). Front view showing the chuck handle attached to the tool chuck (when loosened).

Explanation of symbols

10: chuck handle 12: handle shaft 14: grip 18: bevel gear 20: frame 22: main frame 24: contact frame 24a: contact surface 26: locking pin 60: tool chuck 62: chuck body 62a: handle hole 62b: chuck body Side 64: Tightening sleeve 64a: Gear portion 66: Claw 80: Rotating tool

Claims (5)

A chuck handle for a tool chuck,
A handle shaft,
A gear provided at the tip of the handle shaft;
A frame that rotatably supports the handle shaft;
With locking pins formed on the frame,
The locking pin is inserted into a handle hole formed on the side surface of the tool chuck body, the frame abuts on the side surface of the tool chuck body, and the gear engages with a gear portion formed on the clamping sleeve of the tool chuck. And
At least a part of the range in which the frame abuts against the side surface of the main body of the tool chuck is an angle of less than 180 degrees rearward with respect to the direction in which the fastening sleeve is rotated with respect to the position where the locking pin is inserted into the handle hole. A chuck handle that is located within a range.   At least a part of the range in which the frame abuts the side surface of the tool chuck body is 90 degrees or more and less than 180 in the rearward direction with respect to the direction in which the fastening sleeve is rotated with respect to the position where the locking pin is inserted into the handle hole. The chuck handle according to claim 1, wherein the chuck handle is located within an angular range of the chuck.   The position where the gear engages with the gear portion of the tightening sleeve is a position away from the position where the frame is in contact with the side surface of the main body of the tool chuck with respect to the position where the locking pin is inserted into the handle hole. The chuck handle according to claim 2, wherein:   The position where the gear engages with the gear portion of the tightening sleeve is a position 180 degrees away from the position where the locking pin is inserted into the handle hole in the rearward direction with respect to the direction in which the tightening sleeve is rotated. The chuck handle according to claim 3.   The chuck handle according to any one of claims 1 to 4, wherein the contact surface of the frame that contacts the side surface of the main body of the tool chuck is an arc surface that is curved along the side surface of the main body of the tool chuck. .

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