JPS5930629A - Holding device of bevel gear - Google Patents

Abstract

PURPOSE:To improve the accuracy of holding a bevel gear by the titled device by a method wherein in the bevel gear holding device used in turning the rear surface of a processed bevel gear, at least three support rods each having a spherical top end are provided and the base of each rod is made flexible so as to move freely in the tangential direction of the axis of the bevel gear. CONSTITUTION:The spherical top ends 27 of support rods 28 are brought into engagment with the surfaces 32 of the teeth of a bevel gear 20, respectively, while the bevel gear 20 is fitted about a support shaft 12. In the above condition, a work stop 35 is operated and the bevel gear 20 is thrusted against the support rods 28. With the above structure, even when a pitch error takes place among the surfaces of the teeth of the gear or the accuracy of processing the surfaces of the teeth of the gear becomes irregular, since the support rods 28 are made flexible in the tangential direction of the gear 20, the spherical top ends of the rods 28 move to meet the irregularly processed surfaces of the teeth of the gear 20.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bevel gear holding device for holding a bevel gear such as a round bevel gear or a spiral bevel gear during cutting of the bevel gear.

Conventionally, when cutting a bevel gear, particularly when cutting the back surface of a bevel gear, machining is performed using the previously formed south face as a reference.

In order to perform this cutting process, we added liquid T.
A support device is required to firmly support the bevel gear on its tooth surfaces.

However, a device which firmly holds the bevel at a desired position without damaging the tooth surface and which is relatively compact has not yet been developed.

- The present invention holds the bevel gear accurately at the desired position, cuts the bevel tooth width based on the C tooth surface, improves accuracy and stabilizes the bevel tooth width, and improves work efficiency. The purpose is to provide a holding device.

The bevel gear holding device according to the present invention includes a base body equipped with a support column that fits into a center hole of a bevel gear, and a bevel gear holding device that is supported on the base body at intervals of a predetermined circumference of the central axis of the support column. and a pressing means for pressing the bevel gear in the direction ( ) of the support rod, the support rods supporting the bevel gear in the direction (), "C" which can swing freely only in the circumferential direction of the central axis of the support column
It is characterized by the presence of

Hereinafter, a bevel gear holding device according to the present invention will be explained with reference to the drawings.

1 and 2 show a first embodiment of the lock according to the present invention.
In this device, four parts 2 are provided around the side rotation center of a rotating body 1 which is rotationally driven by a rotational drive device (not shown).

A substantially disk-shaped base body 3 is fitted into the four parts 2, and is fixed to the C rotating body 1 by a plurality of poles 14 and washers 5. The base body 3 is provided with an offset portion 6 and a counterbore portion 7, and the head of the pole 1-4 and the washer 5 are accommodated within the offset portion 6 and the counterbore portion 7.

A through hole 11 is provided at the center of rotation of the base body 3 and communicates with a counterbore portion 10 provided from the front surface 8 of the base body 3 to the back surface 9 thereof. A support column 12 is fitted into the through hole 11 so that the center axis coincides with the rotation center axis of the base body 3, and a fitting 1 is screwed into a threaded portion 13 provided at one end of the support column 12. 14 and a washer 15, it is fixed to the base body 3.

Further, the nut 14 and the washer 15 are arranged to fit within the counterbore portion 10. .

The other end of the support column 12 has a convex portion 22 that fits into the L lid hole 21 of the bevel tooth m 20, and a tapered portion 23 for facilitating attachment and detachment of the bevel gear 20 to and from the support column 12. is set up
Being beaten. Further, the bearing metal 24 is connected to the bevel gear 20
J: is attached by shrink fitting etc.

The base body 3 is provided with a plurality of through holes 25 that are parallel to the rotation axis of the base body 3 and are spaced concentrically and at equal intervals around the rotation axis of the base body 3 (that is, the central axis of the bevel gear 20). Through hole 2
5 communicates with a counterbore portion 26 provided on the back surface 9.

A support rod 28 having a curved, preferably spherical tip 27 is fitted into each through hole 25, and a nut 30 and washer 31 are screwed into a threaded portion 29 provided at the rear end.
J is fixed to the base 3. The neck 1-30 and washer 31 are arranged to fit within the counterbore portion 26.

The spherical tip 27 is sandwiched between adjacent tooth surfaces 32 of the bevel tooth width 20 and abuts on both tooth surfaces.

As is clear from FIG. 2(a), the central part of the support rod 28 is flattened to form a flexible portion that is only flexible in the circumferential direction of the base body 3 (i.e., in the direction of arrow Δ). It is 33.

Further, a tapered pin 34 is provided to prevent the flexible direction from being displaced from the circumferential direction due to rotation of the support rod 28 due to vibration or the like.

The workpiece holder 35 is reciprocated in the direction of the C rotation axis (in other words, the direction of arrow [3] in FIG. 1) by a reciprocating unit IJ+ device (not shown), and the bevel gear 20 that is attached to the support cylinder 12
is pressed against the support rod 28 with a predetermined pressing force in the C direction as required. Further, the work holder 35 is rotatable in the rotational direction of the rotating body 1.

Next, a method of attaching a bevel gear to the Ic bevel gear holding device constructed as described above and an operation of the bevel gear holding device will be explained.

First, while fitting the bevel gear 20 into the support circle 12, the spherical tip 27 of the support rod 28 is inserted between the adjacent tooth surfaces 32 of the bevel gear 20 and brought into contact with the tooth surfaces.

In this state, the work holder 35 is operated and the bevel gear 20
Support [-] Press toward Tsurad 8.

At this time, even if there are variations in the machining accuracy of the south faces, such as pitch errors between each south face, the support rod 28 has flexibility in the circumferential direction of the bevel gear 20, so the spherical tip 27 The movement can be made in accordance with the variation in tooth surface machining accuracy.

Therefore, the bevel gear 20 is accurately and reliably supported irrespective of whether or not there is sufficient variation in the tooth surface cutting process.

The supported bevel gear 20 is rotated by the bevel gear holding Hrf5 by rotating the rotating body 1, and is subjected to a cutting process such as (backside machining) on a predetermined cutting tool.

FIG. 3 shows a second embodiment of the present invention, in which the base body 3 has a plurality of through holes extending parallel to the axis of rotation at equal intervals in the rotational circumferential direction of the base body 3. A hole 40 is provided.

The cross section of the through hole 40 is elongated in the circumferential direction of the base body 3, and a non-flexible support rod 41 having a spherical tip 27 is fitted into the through hole 40. The support rod 41 is supported at its rear end by a branch shaft pin 42 provided in the lateral direction of the through hole 40 so as to be swingable only in the longitudinal direction of the through hole 40 .

A side portion 43 of the support rod 41 along the circumferential direction of the base body 3 is preferably a flat surface, and an inner wall 44 of the through hole 40 that is opposite to the flat side portion 43 is a flat surface that abuts the side portion 43. It has become.

The other parts of the apparatus of the second embodiment described above have the same configuration as the first embodiment, and will not be described in detail.

For example, the support rods 28 and 41 in the devices of the first and second embodiments are provided at one location for every three teeth of the bevel gear.

Also, the bevel gear 20 is directed toward the support rod 28 or 41 (
The pressing means for pressing the workpiece is not limited to mechanical pressing means such as the work holder 35, but it is also possible to use electromagnetic force.

As described in detail below, in the bevel gear holding device according to the present invention, C includes a support rod having a curved tip that can come into contact between the tooth surfaces of the bevel gear, and the curved tip of the support rod is It is made to be able to swing freely only in the circumferential direction of the bevel gear.

Therefore, the curved tip can move according to variations in the tooth surface accuracy of the bevel gear, and the bevel gear is held accurately and reliably, so that cutting oil such as soil for the back surface can be used as a reference for the tooth surface. This makes the machining accuracy more stable.

Furthermore, the bevel gear retaining device of the present invention has a relatively simple structure, and the bevel gear can be attached and detached by simple operations, thereby increasing the work efficiency of backside machining of the bevel gear.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a first embodiment of the present invention, and FIG.
l is a partial cross-sectional view of Fig. 1, Fig. 2 (the same city) is a cross-sectional view indicated by arrow x-X in Fig. 2 (a), and Fig. 2 (C) is a partial cross-sectional view of Fig. An arrow view indicated by Y-Y,
FIG. 3(a) is a sectional view showing the second embodiment of the present invention;
Figure 3 (the same city) is a view shown by the arrow Z-7 at ω.
...Support cylinder 20 ...Bevel width 2
7...Spherical tip 28.4'l...Support rod 32...Tooth surface 33...Flexible portion 35... Work holder/12...Fully shaft bin Applicant Honda Motor Co., Ltd. Agent Patent attorney #Motohiko Motohiko No. 7 Fig. 6 Fig. 2 No. 31 Kasumi

Claims (1)

[Claims] A base body equipped with a support column that fits into a center hole of a bevel gear, which is supported by the base body at a predetermined distance on a circumference of a central axis of the support column, and is capable of abutting between the tooth surfaces of the bevel gear. It consists of at least three support rods having curved tips, a pressing means for pressing the bevel gear toward the support rods, and the curved tips of the support rods are arranged in a circle of the central axis of the support column. A bevel tooth width holding device characterized by being swingable only in the circumferential direction.