JP2561305B2 - Work support device for gear cutting - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work supporting device for gear cutting that supports a work to be gear-cut to form a gear.

(Prior Art) When a gear is manufactured by gear cutting, a work for gear cutting is usually mounted and fixed on a work mounting portion provided in a work supporting device, and intermittently at a predetermined rotation angle. While being driven to rotate, gear cutting means provided in the gear cutting machine, for example, a rotatable pillion cutter is brought into contact with the peripheral edge of the work. When gear cutting of such a gear is performed,
Generally, the work mounting portion in the work supporting device is configured such that the rotation axis of the work held by the work supporting apparatus and the rotation axis of the pinion cutter are parallel to each other, and under such a state, the pinion cutter is While reciprocating, it abuts the peripheral edge of the work, while the work is indexed at a predetermined angle and rotated. As a result, teeth are sequentially formed on the outer peripheral portion of the work to obtain a gear.

As described above, the gear thus obtained is such that the rotation axis of the work and the rotation axis of the pinion cutter are made parallel to each other, and the teeth are formed on the work, so the tooth surface is The spur gear will be along the direction of the rotation axis. On the other hand, for example, a gear whose tooth surface has a predetermined inclination angle with respect to the rotational axis direction thereof (such as a clutch gear constituting a synchronous meshing mechanism in an automatic transmission mounted on a vehicle (hereinafter, Bevel gears) are also needed in various fields. Therefore, in order to obtain the inclined tooth surface gear under the use of the work supporting device and the gear cutting machine as described above, for example, the rotation shaft of the pinion cutter in the gear cutting machine is Inclining with respect to the rotation axis of the work in the support device,
Alternatively, it is conceivable that the work mounting portion of the work supporting device has a rotation shaft of the work held thereby having a predetermined inclination angle with respect to the rotation shaft of the pinion cutter of the gear cutting machine. .

(Problems to be Solved by the Invention) However, as described above, in order to make the rotation axis of the pinion cutter in the gear cutting machine and the rotation axis of the work in the work supporting device not parallel to each other, the pinion in the gear cutting machine When the rotary shaft of the cutter is tilted with respect to the rotary shaft of the work in the work supporting device, or the work mounting portion of the work supporting device is tilted with respect to the rotary shaft of the vinylon cutter in the gear cutting machine. In any of the above cases, since the angular relationship between the rotation axis of the pinion cutter and the rotation axis of the workpiece, which has been set once, is fixed, the rotation axis of the pinion cutter is set in accordance with the desired gear. There is the inconvenience that it is not possible to arbitrarily select the angle of the work rotation axis within a predetermined range. You.

Further, in order to incline the rotation axis of the work with respect to the rotation axis of the pinion cutter, the entire mechanism of the work support device including the work mounting portion is inclined.
Therefore, it is not easy to obtain an appropriate tilted state, and the mechanism part having a relatively large weight is tilted, which may result in an undesired burden on each part of the work supporting device. There is.

In view of such a point, the present invention holds a work to be gear-cut, and the held work is processed by a gear-cutting means provided in a gear-cutting machine to form a gear or the like. In this case, even when a desired gear or the like has an inclined tooth surface, an appropriate mutual angular relationship between the gear cutting means and the workpiece corresponding to the inclined tooth surface is not properly provided to each mechanism section. It is an object of the present invention to provide a work supporting device for gear cutting that can be set easily and quickly without imposing a desired load.

(Means for Solving the Problem) In order to achieve the above-mentioned object, a work supporting device for gear cutting according to the present invention is a cylindrical body having a hemispherical portion provided at an upper end portion thereof, and has a hemispherical portion. A through hole having a relatively large diameter is formed along the axial direction, a rotation support shaft member rotatably supported by a fixed portion, and a through hole are formed, and a gear cutting device is provided at one end side thereof. A workpiece mounting portion, and a rotating member provided with a concave portion having an inner surface that forms a part of a spherical inner surface on the other end side, and a rotating member,
A work support portion including a holding member that engages a concave portion provided therein with a hemispherical portion of the rotation support shaft member and holds the rotation center shaft along a through hole provided therein in a rotatable state, and a work support portion. And a tilt adjusting support part for supporting the part in a variable tilt posture with respect to the fixed part, and in addition, the first and second rods are connected via a universal joint, A through hole formed in the hemispherical portion of the rotary support shaft member and the work support, the universal joint being located inside the hemispherical portion provided in the rotary support shaft member and penetrating the member. It is assumed that the workpiece mounting portion is reached through a through hole formed in the rotating member of the rotating section, and the universal joint is bent in accordance with the inclination state of the workpiece supporting section supported by the inclination adjusting supporting section. And a movable rod member that is moved in a direction along the through hole formed in the rotating member in the work supporting portion to engage with the work mounting portion and fix the work to the work mounting portion. Is configured.

(Operation) In the work supporting device for gear cutting according to the present invention configured as described above, the movable rod member is the rotating member, and the movable rod member is the rotating member at the workpiece mounting portion provided on the rotating member at the workpiece time portion. By being moved in the direction along the through hole formed in and engaged with the work mounting portion, it is fixed to the work mounting portion. Then, the support state of the work support portion by the tilt adjustment support portion is adjusted, and the work support portion is supported by the tilt adjustment support portion in a state in which the work support portion has an inclined posture corresponding to the gear or the like to be obtained from the work with respect to the fixed portion. It is supposed to have been done. At that time, the movable rod member that penetrates the rotary shaft member and the rotary member in the work supporting portion has a first rod whose first rod is associated with the rotary member which is inclined by the work supporting portion taking the inclined posture. ,
In the universal joint, the second rod is bent within the range of the through hole formed in the hemispherical portion of the rotary support shaft member and having a relatively large diameter. By doing so, the work fixed to the work mounting portion makes an appropriate angle with respect to the gear cutting device in accordance with the gear or the like to be obtained from the work, and the rotation supporting shaft member rotates. In this state, the workpiece is cut by the gear cutting device.

Thus, in the work supporting device for gear cutting according to the present invention, the support state of the work supporting part by the inclination adjusting supporting part is adjusted, so that the work supporting device is easily and quickly fixed to the work mounting part. The workpiece is brought into a state of forming an appropriate angle with respect to the gear cutting device according to a gear or the like having an inclined tooth surface to be obtained therefrom. In addition, the angle of the work fixed to the work mounting part with respect to the gear cutting device can be arbitrarily selected within a predetermined range, and therefore, quick response to gear cutting for forming various gears is possible. In addition, the part where the inclination state is adjusted when the work is made at the selected angle with respect to the gear cutting device is a relatively small part provided with the work mounting part. Therefore, there is no fear that an undesired burden will be imposed on each of the other mechanical units.

(Example) Hereinafter, the Example of this invention is described with reference to drawings.

FIG. 1 and FIG. 2 show an example of a work supporting device for gear cutting according to the present invention, together with a work supported by the gear cutting device and subjected to gear cutting processing to form an inclined tooth surface gear.

In this example, the work supporting part is held by the fixed part 10 and is engaged with the upper end of the rotary support shaft member 11 to form the work mounting part.
A work supporting part 15 composed of a rotating member 13 provided with a rotating member 13 and a holding member 14 for holding the rotating member 13, and an inclination adjusting supporting part 16 for supporting the work supporting part 15 so as to be inclined with respect to the fixed part 10.
The rotation support member 11 and the rotation member 13 in the work support portion 15
A movable rod member (17) penetrating therethrough and an adjusting screw member (18) for adjusting the posture of the work supporting portion (15) are provided.

The rotation support shaft member 11 has a cylindrical shape as a whole, and is rotatably held by the fixed portion 10 via a bearing 19. The lower end portion of the rotation support shaft member 11 is engaged with a worm 20 driven by a motor or the like. When the worm wheel 11a is formed and the worm 20 is driven to rotate, the rotation support shaft member
The whole 11 is rotated. Further, the upper end portion of the rotary support shaft member 11 is formed into a hemispherical portion 21, and in this hemispherical portion 21, a through hole 22 having a tapered inner surface having a relatively large diameter and a space 23 following it are formed. There is.

The rotating member 13 constituting the work supporting portion 15 is provided with the work mounting portion 12 on the upper end side, and has a recess 24 having an inner surface forming a part of the inner surface of the sphere on the lower end side, and further the center thereof. Through hole 25 that leads from the upper end to the lower end
Is said to have been formed. On the other hand, the holding member 14 that constitutes the work supporting portion 15 together with the rotating member 13 is a rotating member.
It is supposed to surround 13 and through the bearing 26, the rotating member
The recessed portion 24 formed therein is engaged with the hemispherical portion 21 of the rotation support shaft member 11, and is held so as to be rotatable about the rotation center axis along the through hole 25. Further, the holding member 14 has an outer surface portion 14a having a curved surface forming a part of a cylindrical surface.

The tilt adjustment support portion 16 is fixed on the fixed portion 10,
The curved surface engaging portion 16a is engaged with the outer surface portion 14a of the holding member 14 to support the holding member 14. An engagement pin 27 that penetrates a guide hole 14b provided in the vicinity of the outer surface portion 14a of the holding member 14 is provided on the side surface of the curved surface engagement portion 16a. As a result, the holding member 14 becomes the engagement pin 27.
Within a range in which the guide hole 14b can move, the recessed portion 24 is slid with respect to the hemispherical portion 21 of the rotary support shaft member 11, and the outer surface portion 14a is attached to the curved surface engaging portion 16a of the tilt adjusting support portion 16. It can be displaced with respect to the tilt adjustment support portion 16 under the condition of sliding against it. And the holding member 14 is a fixed part.
A tip portion 18a having a hemispherical surface abuts on the upper surface of 10 and is tilted to engage an adjusting screw member 18 with a female screw portion 14c formed near the upper surface. As a result, when the adjusting screw member 18 is rotated, the female screw portion 14c formed on the holding member 14 becomes
While the inclination angle with respect to the fixed portion 10 is changed, it moves along the adjusting screw member 18, and accordingly the holding member 14 is displaced with respect to the inclination adjusting support portion 16, and accordingly, the work supporting portion 15 The whole is displaced with respect to the inclination adjustment support portion 16, and the inclination angle of the work support portion 15 with respect to the fixed portion 10 is changed.

By adopting such a configuration, the tilt adjustment support portion 16
Means that the work supporting portion 15 is supported so as to be tiltable with respect to the fixed portion 10, and the tilted state of the work supporting portion 15 with respect to the fixed portion 10 is adjusted by the adjusting screw member 18.

The movable rod member 17 is configured by connecting two rods 28a and 28b via a universal joint 29, and the universal joint 29 is provided inside the rotary support shaft member 11 with a hemispherical portion of the rotary support shaft member 11. It is arranged so as to be located in a space 23 formed inside 21. And a rod extending upward from the universal joint 29
28a is to reach the inside of the work mounting portion 12 through a through hole 22 formed in the hemispherical portion 21 of the rotary support shaft member 11 and a through hole 25 formed in the rotating member 13 of the work supporting member 15. The tip portion of the rod 28a forms a tapered portion 28t whose diameter gradually decreases from the end face portion side toward the central portion side. Further, at the lower end of the rod 28b extending downward from the universal joint 29, the piston 3 arranged in the cylinder portion 11b formed in the lower portion of the rotary support shaft member 11 is provided.
0 is provided. A plurality of disc springs 31 are arranged between the inner wall of the upper portion of the cylinder portion 11b and the piston 30, and the piston 30 is constantly urged downward by the disc spring 31. This disc spring 31 forms a rotation transmission system from the rotation support shaft member 11 to the movable rod member 17,
The movable rod member 17 is rotated along with the rotation of the rotation support shaft member 11. Further, inside the cylinder portion 11b, a hydraulic pipe 32 connected to a through hole 11c formed in the worm wheel 11a at the lower end portion of the rotary support shaft member 11 is provided.
Hydraulic pressure is supplied through the
Is pushed up, and the entire movable rod member 17 is slightly displaced upward.

As shown in FIGS. 3 and 4, the work mounting portion 12 provided on the rotating member 13 constituting the work supporting portion 15 is a base body having a tubular portion 40a fixed to the rotating member 13 by a mounting screw. 40, the rod 28a that constitutes the movable rod member 17 penetrates the inside of the tubular portion 40a, and the tip end portion of the rod 28a can project above the upper end surface of the tubular portion 40a. . Then, as shown in FIG. 3, in the tubular portion 40a of the base body 40, six pressing piece members 41 are provided around the axis of the tubular portion 40a at a position corresponding to the tapered portion 28t of the rod 28a. They are arranged at equal intervals and are displaceable in the radial direction of the tubular portion 40a. Each of the pressing piece members 41 has its inner surface in contact with the outer surface of the tapered portion 28t of the rod 28a, and has its outer surface desired outside the tubular portion 41a. An elastic pressing ring 42 for preventing the pressing piece member 41 from falling off from the tubular portion 40a is engaged with each outer surface side of the elastic pressing ring 42.
The outer surface of the is flush with the outer surface of the tubular portion 40a.

Further, an engagement pin 43 is screwed into the tubular portion 40a, and the tip of the engagement pin 43 is engaged with a recess 44 provided in the rod 28a, whereby the base portion 40 is rod-shaped.
Fixed against 28a. When the base 40 is fixed to the rod 28a, the work mounting unit 12 is rotated as the movable rod member 17 rotates.

The work W is fitted to the outer periphery of the portion of the cylindrical portion 40a of the work mounting portion 12 having the above-mentioned configuration where the pressing piece member 41 is arranged. When the work W is fitted into the tubular portion 40a, the movable rod member 17 is raised so that the tip of the rod 28a is located above the tubular portion 40a, as indicated by the alternate long and short dash line in FIG. It is supposed to project upward from the end face, so that the tubular part
The inner side surface of each pressing piece member 41 arranged on the 40a abuts on a relatively small diameter portion of the tapered portion 28t of the rod 28a, and the outer side surface of each pressing piece member 41 forms the outer side surface of the tubular portion 40a. It is left in a state where it does not protrude beyond the outside.

After the work W is fitted in the tubular portion 40a, the movable rod member 17 is lowered to the position shown by the solid line in FIG. 4, and the tip of the rod 28a is placed on the tubular portion 40a. It is assumed to be close to the end face, and the tubular portion 40a
The inner side surface of each pressing piece member 41 arranged in contact with the relatively large diameter portion of the tapered portion 28t of the rod 28a, thereby the outer surface of each pressing piece member 41 outside the tubular portion 40a. It projects outward from the side surface and contacts the inner surface of the work W. In this way, the outer surface of each pressing piece member 41 arranged in the tubular portion 40a abuts the inner surface of the workpiece W fitted in the tubular portion 40a, so that the workpiece W is attached to the workpiece mounting portion 12. A fixed state is obtained.

When the example of the work supporting device for gear cutting according to the present invention configured as described above is used to perform the gear cutting processing on the work W, first, as described above, the work W is The movable rod member 17 is raised and fitted into the tubular portion 40a of the work mounting portion 12, and then the movable rod member 17 is lowered and fixed to the work mounting portion 12. In such a case, the movable rod member 17 is lifted and lowered by supplying and discharging the operating pressure oil through the hydraulic pipe 32 into the cylinder portion 11b provided in the rotary support shaft member 11.

Further, the work W constitutes, for example, a synchronous meshing mechanism in an automatic transmission mounted on a vehicle, and has an inclined tooth surface portion 50 as shown in FIG. Clutch gear
It is supposed to be 51 and is formed into an annular body as a whole, and a portion to be subjected to gear cutting is prepared in advance.

Next, the adjusting screw member 18 engaged with the holding member 14 in the work supporting portion 15 is rotated, and the holding member 14 receives the guide formed by the guide hole 14b and the engaging pin 27 penetrating the guide hole 14b. Under the original condition, the inclination adjusting support portion 16 fixed on the fixing portion 10 is displaced, and the inclination angle of the work supporting portion 15 with respect to the fixing portion 10 is changed accordingly.
At that time, the pointer 52 provided in the vicinity of the outer surface portion 14a of the holding member 14 and the angle display scale 53 provided on the curved surface engaging portion 16a of the inclination adjusting support portion 16 are used for detecting the amount of inclination angle change. Used.

As a result of the adjustment by the adjusting screw member 18 performed in this way, for example, as shown in FIG.
Is inclined with respect to the fixed part 10, and accordingly, the work W fixed to the work mounting part 12 in the work support part 15 has a rotary shaft of the gear cutting device 60 indicated by a chain line in FIG. With respect to, it is assumed to be inclined at a predetermined angle. The degree of inclination of the work W with respect to the rotation axis of the gear cutting device 60 is set according to the inclined tooth surface to be formed on the work W.

In such a case, as the inclination angle of the work support portion 15 with respect to the fixed portion 10 is changed, the through hole 22 and the work support member 15 formed in the hemispherical portion 21 of the rotation support shaft member 11 are changed.
The rod 28a which is supposed to reach the inside of the workpiece mounting portion 12 through the through hole 25 formed in the rotating member 13 in
As shown in FIG. 6, through the universal joint 29, the rod 28
The rod 28a is bent with respect to b, and the bending state of the rod 28a is possible within the range of the through hole 22 formed in the hemispherical portion 21 of the rotation support shaft member 11.

After that, the rotation support shaft member 11 is rotated so that the work W fixed to the work mounting portion 12 is appropriately rotated, and the gear cutting device 60 is appropriately rotated,
The workpiece W is brought into contact with the workpiece W while moving up and down along the axis, and the workpiece W is subjected to gear cutting.

As described above, the work W fixed to the work mounting portion 12 is inclined with respect to the rotation axis of the gear cutting device 60 at a predetermined angle, and the work W is cut by the gear cutting device 60. By performing the gear cutting of
Predetermined inclined tooth flanks are sequentially formed on the work W, and as a result, a clutch gear 51 having an inclined tooth flank portion 50 as shown in FIG. 5 is obtained. The state in which the work W is inclined at a predetermined angle with respect to the rotation shaft of the gear cutting device 60 can be obtained by a simple adjustment in which the adjustment screw member 18 is rotated.

(Effects of the Invention) As is clear from the above description, according to the work supporting device for gear cutting according to the present invention, the work to be gear-cut is held, and the held device is brought into contact with the gear cutting device. When gears and the like are formed by the gear cutting process that is performed, even when the gear and the like to be obtained have an inclined tooth surface, for example, adjustment is performed only by adjusting means such as an adjusting screw member. With a simple operation, the appropriate mutual angular relationship between the gear cutting device and the workpiece can be set easily and quickly according to the inclined tooth flank to be formed.

Moreover, the angle formed by the workpiece with respect to the gear cutting device can be arbitrarily selected within a predetermined range, and therefore, the gear cutting process for forming various inclined tooth surfaces can be quickly taken.

Furthermore, the part where the inclination angle with respect to the fixed part should be changed when the work forms the selected angle with respect to the gear cutting device can be a relatively small part provided with the work mounting part. There is an advantage that it is possible to avoid a situation where an undesired burden is imposed on each of the other mechanical units.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an example of a gear cutting work supporting device according to the present invention together with a work attached thereto, and FIG. 2 is a schematic plan view showing a part of the example shown in FIG.
3 is a plan view showing the work mounting portion and the work in the example shown in FIG. 1, FIG. 4 is a sectional view taken along line IV-IV in FIG. 3, and FIG. 5 is an example shown in FIG. 6 is a partial perspective view showing an example of a gear obtained from a work mounted on
The figure is a partial cross-sectional view showing a state in which the example shown in FIG. 1 is subjected to gear cutting. In the figure, 10 is a fixed part, 11 is a rotation support shaft member, 12 is a work mounting part, 13 is a rotation member, 14 is a holding member, 15 is a work support part,
Reference numeral 16 is an inclination adjusting support portion, 17 is a movable rod member, 18 is an adjusting screw member, 21 is a hemispherical portion, 28a and 28b are rods, 29 is a universal joint, and W is a work.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshimasa Kitahara 3-1, Shinchi Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Co., Ltd. (56) References Japanese Patent Publication Sho 59-12411 (JP, B2)

Claims (1)

(57) [Claims] 1. A cylindrical body having an upper end portion provided with a hemispherical portion, and a through hole having a relatively large diameter is formed along the axial direction in the hemispherical portion and is rotatable by a fixed portion. A rotation support member supported by the through hole, a through hole is provided, a work mounting portion facing the gear cutting device is provided at one end side of the through hole, and a part of the inner surface of the sphere is provided at the other end side of the through hole. A rotating member having a recess having an inner surface formed therein, and a state in which the rotating member can be rotated with a rotation center axis along the through hole while the recess is engaged with the hemispherical portion of the rotation support shaft member. A work supporting part composed of a holding member for holding, a tilt adjusting supporting part supporting the work supporting part so as to be able to assume a variable tilt posture with respect to the fixed part, and a universal joint in which the first and second rods are provided. Connected via The universal joint penetrating through the shaft member is arranged by arranging the universal joint inside the hemispherical portion provided on the rotary support shaft member, and the first rod is formed in the hemispherical portion. The workpiece mounting portion is reached through a through hole formed in the rotating member in the supporting portion, and is bent in the universal joint in accordance with the inclination state of the workpiece supporting portion supported by the inclination adjusting supporting portion. A movable rod member that is moved in a direction along a through hole formed in the rotating member to engage with the work mounting portion and fix the work to the work mounting portion. Work support device for gear cutting.