JPH0633634U - Gear holding jig - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a gear holding jig that can hold a gear in a short time and easily and can hold the gear without eccentricity. [Structure] A plate-shaped gear holding plate 11 on which a ring-shaped gear is placed, and a collet mounting member 1 having a screw portion 12 formed at least at an end thereof so as to project from substantially the center of the gear holding plate.
3, a collet 15 in which a plurality of claw members 14 which are concentrically inserted into the collet mounting member and elastically deformed at the peripheral edge are formed along the circumferential direction, and the collet which is screwed into the thread portion of the collet mounting member to form the collet. A nut 16 for pressing and moving in the axial direction, and when the collet is pressed and moved by the nut at a position inward of the gear on the gear holding plate and facing a claw member of the collet. A plurality of claw members of the collet are in contact with each other to form a tapered projection 18 that elastically deforms the claw members toward the inner circumference of the gear and abuts against the inner circumference thereof.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a gear holding jig that holds a ring-shaped gear and performs, for example, finishing and inspection.

[0002]

[Prior art]

 A conventional gear holding jig is shown in FIG. That is, a gear holding plate 2 on which the gear A is placed is formed concentrically with the shank 1, and a regulation plate 3 having an outer shape corresponding to the inner peripheral shape of the gear A is formed on the gear holding plate 2. The inner periphery of the gear A is inserted into the regulation plate 3, the gear A is placed on the gear holding plate 2, and the washer 4 is covered from above the gear A, and the end portion of the shank 1 is formed. The nut 5 is fastened to the screw formed on the gear so that the gear A is integrated with the gear holding plate 2.

The gear holding jig integrally holding the gear A in this way is used, for example, as shown in FIG. That is, both ends of the shank 1 are rotatably held by two center members 6 and 7, and the tooth deviation is measured by a dial gauge provided on the side surface of the gear A while rotating the gear holding jig. .

[0004]

[Problems to be solved by the device]

 However, in the conventional gear holding jig, the inner periphery of the gear A is inserted into the restriction plate 3, the gear A is placed on the gear holding plate 2, and the washer 4 is placed over the gear A to form the shank 1 Since the gear 5 is integrated with the gear holding plate 2 by tightening the nut 5 on the screw formed at the end of the gear, there is a problem that it takes time and effort to hold the gear.

In the conventional gear holding jig, the regulation plate 3 is inserted into the inner circumference of the gear A so that the gear A is placed on the gear holding plate 2. In order to facilitate the insertion of the gear A, a slight gap S 1 is formed between the regulation plate 3 and the gear A as shown in FIG. Therefore, the gear A may be mounted eccentrically with respect to the gear holding jig by the amount of this gap, and there is a problem that an error occurs, for example, in measuring the gear tooth deviation.

The present invention has been made in view of the above circumstances, and can hold a gear in a short time and easily, and can hold the gear without eccentricity in the subsequent processing such as inspection. It is an object of the present invention to provide a gear holding jig that can prevent an error from occurring.

[0007]

[Means for Solving the Problems]

 The gear holding jig of the present invention is a plate-shaped gear holding plate on which a ring-shaped gear is placed, and a coret mounting member protruding from substantially the center of the gear holding plate and having a threaded portion at least at its end. And a collet in which a plurality of claw members that are concentrically inserted into this collet mounting member and elastically deformed at the peripheral edge are formed along the circumferential direction, and that the collet is screwed into the threaded portion of the collet mounting member to axially move the collet. A nut for pushing and moving the collet when the collet is pushed and moved by the nut at a position inward of the gear on the gear holding plate and facing the claw member of the collet. It is characterized in that a plurality of claw members are in contact with each other, and the claw members are elastically deformed toward the inner circumference of the gear to form a tapered projection for abutting the inner circumference.

[0008]

[Action]

 According to the gear holding jig of the present invention, the nut is loosened and the collet is slightly retracted to release the contact between the pawl member and the tapered projection. Next, place the gear on the gear holding plate and tighten the nut again. As a result, the collet is pressed and moved toward the gear. At this time, the claw member of the collet is brought into contact with the tapered projection and elastically deformed toward the inner circumference of the gear to be evenly contacted with the inner circumference of the gear, so that the gear passes through the collet. Is held concentrically with the gear holding jig.

[0009]

Embodiment A gear holding jig according to an embodiment of the present invention will be described below with reference to the drawings.

The gear holding jig 10 of the present embodiment includes a plate-shaped gear holding plate 11 on which a ring-shaped gear A is placed, and a gear holding plate 11 protruding from one side to the one side from the center of the gear holding plate 11 to at least an end portion. A collet mounting member 13 having a threaded portion 12 formed therein, and a cylindrical collet 15 having a plurality of claw members 14 concentrically inserted into the collet mounting member 13 and elastically deformed at the peripheral edge formed along the circumferential direction. A nut 16 that is screwed into the thread portion 12 of the collet mounting member 13 to push and move the collet 15 in the axial direction, and a rod-shaped grip member 17 that projects to the other side of the gear holding plate 11 are provided.

Further, when the collet 15 is pressed and moved by the nut 16 to a position inward of the gear A on the gear holding plate 11 and facing the claw member 14 of the collet 15. A plurality of claw members 14 of the collet 15 contact each other to elastically deform the claw members 14 toward the inner circumference of the gear A to form a tapered projection 18 for contacting the inner circumference.

In the claw member 14 of the collet 15, a plurality of slits are formed on the cylindrical collet 15 at predetermined intervals in the circumferential direction, and the slits serve as the claw member 14. In addition, in this embodiment, the claw members 14 are provided evenly over the entire circumference.

Next, a usage method and an operation of the gear holding jig 10 of this embodiment will be described.

First, the nut 16 is loosened and the collet 15 is slightly retracted to release the contact between the claw member 14 and the tapered protrusion 18. Next, the gear A is placed on the gear holding plate 11 and the nut 16 is tightened again. As a result, the collet 15 is pressed and moved toward the gear A. At this time, the claw member 14 of the collet 15 is brought into contact with the tapered projection 18 and elastically deformed toward the inner circumference of the gear A so as to be evenly contacted with the inner circumference of the gear A. Are held concentrically with the gear holding jig 10 via the collet 15.

As described above, according to the gear holding jig 10 of the present embodiment, the gear A is simply operated by loosening the nut 16 and placing the gear A on the gear holding plate 11 and tightening the nut 16 again. Can be held or released. Therefore, as compared with the above-described conventional gear holding jig, workability of mounting or dismounting can be significantly improved.

Further, according to the gear holding jig 10 of the present embodiment, the plurality of claw members 14 circumferentially provided on the peripheral edge of the collet 15 are pressed against the inner periphery of the gear A so as to be brought into contact therewith. Therefore, the gear A is aligned and attached to the collet 15. Therefore, when the gears A held by the gear holding jig 10 are subjected to processing such as inspection and processing, the accuracy of these processings can be improved.

[0017]

[Effect of device]

 As described above, according to the gear holding jig of the present invention, a plate-shaped gear holding plate on which a ring-shaped gear is placed, and a screw portion protruding from substantially the center of the gear holding plate and having a threaded portion at least at the end. The formed collet mounting member, a collet that is concentrically inserted in the collet mounting member, and has a plurality of claw members that are elastically deformed at the peripheral edge formed along the circumferential direction, and screwed into the thread portion of the collet mounting member. A nut for pushing and moving the collet in the axial direction, and the collet is pushed and moved by the nut at a position inward of the gear on the gear holding plate and facing the claw member of the collet. Since a plurality of claw members of the collet sometimes come into contact with each other and the claw members are elastically deformed toward the inner circumference of the gear to abut against the inner circumference, a tapered projection is formed. And it is possible to retain the simple gear, it can be prevented and this resulting a error in the process of inspection can be thereafter be held without eccentric gear.

[Brief description of drawings]

FIG. 1 is a sectional view showing a gear holding jig according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a conventional gear holding jig.

FIG. 3 is a diagram showing a method of using a conventional gear holding jig.

FIG. 4 is a sectional view showing a defect of a conventional gear holding jig.

[Explanation of symbols]

 10 Gear holding jig 11 Gear holding plate 12 Screw part 13 Collet mounting member 14 Claw member 15 Collet 16 Nut 18 Tapered protrusion

Claims (1)

[Scope of utility model registration request] 1. A plate-shaped gear holding plate on which a ring-shaped gear is mounted, a collet mounting member protruding from substantially the center of the gear holding plate and having a threaded portion at least at its end, and this collet mounting member. A collet in which a plurality of claw members that are inserted concentrically and that are elastically deformed at the peripheral edge are formed along the circumferential direction; and a nut that is screwed into the threaded portion of the collet mounting member to press and move the collet in the axial direction. A plurality of claw members of the collet are in contact when the collet is pressed and moved by the nut at a position inward of the gear in the gear holding plate and facing the claw member of the collet. A gear holding jig, characterized in that a tapered projection is formed which elastically deforms the claw member toward the inner circumference of the gear and makes contact with the inner circumference.