JPS6186126A - Helical guide structure of gear shaping machine - Google Patents

Abstract

PURPOSE:To increase the gear manufacturing efficiency, by constituting a gear shaping machine by which helical gears are manufactured with a pinion cutter, as plural gears whose each helix angle is different with each other, can be processed without exchanging helical guides. CONSTITUTION:In performing the gear shaping work, a pinion cutter 12 is attached to the lower end of a cutter fixing shaft 11. Then, a lead determinative block 30 is advanced toward a helical guide 25 by feeding pressure oil into a pressure oil room 38 of this block 30, and engaged with the corresponding projecting threads of the outer circumferential surface of the helical guide 25. After that, a rotary supporting cylinder 21, a guide case 24, the helical guide 25, a cutter spindle 10, the cutter fixing shaft 11 and the pinion cutter 12 are rotated as an integrated one body, through a worm wheel 22, by rotating a master worm. At the same time as the helical guide 25 is moved upward/ downward through a lift shaft 9, the inclined grooves of the lead determinative block 30, which are correspondent to the lead of the cutter, are engaged with the threads of the helical guide 25. In this way, desired helical gears are manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a helical guide used in a gear shaping machine that uses a pinion cutter to manufacture helical gears for power transmission.

[Conventional technology]

Conventionally, such helical gears have been cut by a gear shaper, an example of which is shown in FIG.

In the same figure, 1 is the housing, 2 is the housing 1
The rotating motor 3 installed inside is the ■Hert pulley 4,
A power transmission mechanism consisting of (1) a belt 5, (2) a belt pulley 6, and a rotation transmission shaft 7; 10 is a canter spindle disposed at the bottom of the vertical reciprocating motion, 10a is a cutter mounting shaft with a pinion cutter 1.1 attached to the lower end;
Reference numeral 12 denotes a helical guide for applying a constant rotation corresponding to the pinion force and lead of the pinion cutter 11 to the cutter spindle 10a and the pinion cutter 11.

[Problem that the invention seeks to solve]

However, the helical guide 12 requires changing the lead of the guide groove every time the lead of the pinion cutter for helical gear processing changes.

Therefore, when manufacturing helical gears with different helix angles, it was necessary to replace the helical guide. Such replacement work usually takes a considerable amount of time and is technically difficult, leading to a decrease in the efficiency of gear manufacturing work.

In particular, in recent years, the production of helical gears used in automobile transmissions, etc. has become increasingly dependent on FMS (Flexible machining), which allows the type and quantity to be changed in response to needs.
However, such helical guides have not been able to adequately support FMS.

An object of the present invention is to provide a helical guide for a gear shaper that can manufacture a plurality of helical gears with different helix angles without replacing the helical guide, and can quickly and easily manufacture helical gears. shall be.

c. Means for Solving Problems] Hereinafter, means for solving the above problems will be specifically explained based on the embodiment shown in the attached drawings.

In Fig. 1 showing the overall configuration of the pinion cutter lifting/rotating mechanism, 20 is the machine frame l of the gear shaper shown in Fig. 13.
This is a cutter head fixedly attached to the same cutter head 2.
0 has a rotatable support cylinder 21 rotatably attached to the lower part of its interior for rotating the pinion cutter in conjunction with the rotation of the gear to be cut. Reference numeral 22 denotes a worm foil fixed to the outer periphery of the rotary support cylinder 21 in order to rotate the rotary support cylinder 21, and is in agreement with a master worm (not shown).

Reference numeral 23 denotes a cover fixedly arranged at the upper part of the inside of the cutter head 20.

Reference numeral 24 denotes a guide case that is integrally fitted and fixed inside the rotary support cylinder 21. The guide case 24 has a helical guide 25 attached inside thereof so as to be able to move up and down and freely rotate. The shaft lO is inserted and fixed.

Further, in FIG. 1, reference numeral 26 denotes a ball joint that allows the helical guide 25 to rotate relative to the lifting shaft 9, but is attached so that it moves up and down integrally.

In this basic configuration, the present invention provides the helical guide 25 and the guide case 24 surrounding the helical guide 25, even when the helix angle of the gear to be machined is changed.
The present invention is characterized by a configuration in which gear cutting can be performed without replacing the helical guide 25.

The configurations of the helical guide 25 and guide case 24 will be described below with reference to FIGS. 4 to 12.

As shown in FIGS. 6 and 7, the guide case 24 has six block mounting openings 27, 28, and 29 extending in the radial direction formed in the lower circumferential wall of the guide case 24 with equal circumferential pinches. As shown in FIGS. 1, 4 and 5, lead setting moving blocks 30, 31 and 32 are disposed within the opening 26 so as to be movable in the radial direction.

The block mounting openings 27, 28, and 29 each have a different inclination angle αl with respect to the axis of the Rekaido case 24.
, α2, and α3, and accordingly, the axes of the moving blocks 30, 31, and 32 are also inclined by about 1 with respect to the axis of the guide case 24.

As shown in FIGS. 1 and 3, lead setting block 3
0.31.32 each have an inclination e34.35, 36 on the inner surface aligned with the inclination axis of the block. Further, the lead setting block 30 is attached to a support pin 3'7 whose base end protrudes from the inner surface of the rotary support cylinder 21 on its outer surface so as to be slidable toward the helical guide 24. A pressure oil chamber 38 is formed between the lead setting block 30 and the like.

Further, the guide case 24 has at least three annular grooves 40. '41゜42 is aisle 4
4 respectively for lead configuration blocks 30.31.
32 is connected to the pressure oil chamber 38, and the fixed cover 23
It can selectively communicate with a hydraulic oil supply pipe 45 formed on the inner surface of the pipe.

This selection is made by programming to switch an electromagnetic solenoid valve (not shown).

With this configuration, only the selected lead setting block can be advanced toward the helical guide 24 by communicating the pressure oil supply pipe 45 with the pressure oil chamber 38 of an arbitrarily selected lead setting block.

In FIG. 3, reference numeral 46 indicates a spring for holding the lead setting block 30 and the like in the retracted position when engaged.

Further, as shown in FIGS. 3 and 8 to 10, the helical guide 24 has engagement grooves 34 and 35 formed on the inner surface of the lead setting block on its outer peripheral surface, each having a different angle of inclination. .36 engagement protrusion 50.
51.52 are provided over the entire length.

Next, a gear shaping operation using the helical guide having the above configuration will be explained.

First, as shown in FIG. 1, a pinion cutter II is attached to the lower end of the canter attachment shaft 10. In addition, among the lead setting blocks 30, 31, and 32, those having an inclined groove with an inclination angle corresponding to the lead of the pinion canter to be used can be set to the helical guide 2 by supplying pressure oil into the pressure oil chamber.
5 and engages with a corresponding one of the engagement protrusions provided on the outer peripheral surface of the helical guide 25.

Thereafter, the master worm is rotated to reach the rotation support tube 22 via the worm wheel 22, and the guide case 24 disposed inside the rotation support tube 22. The helical guide 25, the Qantas spindle IO, the cutter mounting shaft 11, and the pinion cutter 12 are integrally rotated at a low speed in conjunction with the rotation of the gear to be machined.

Further, the rotary motor 2 in FIG. 13 is driven to reciprocate the helical guide 25 in the vertical direction via the elevating shaft 9, and at the same time, at the same time, the lead setting corresponding to the lead of the pinion cutter 12 is performed. The inclined groove of the block is engaged with the inclined protrusion of the helical guide 25. Through this operation, the pinion cutter 12 reciprocates while rotating at a constant angle, making it possible to manufacture a gear having a desired helix angle.

After that, when manufacturing gears with different helix angles, without replacing the helical guide 25, select a lead setting block with an inclined groove that corresponds to the lead of the pinion cutter to be used, and set the corresponding helical guide 25. After engaging with the inclined protrusion, the gear may be machined in the same manner as described above.

In the illustrated embodiment, the helical guide 25 has three types of inclined protrusions, but the number is not limited to this, and for example, two types or four or more types of guards may be used.

〔Effect of the invention〕

As described above, according to the present invention, a plurality of gears having different helix angles can be machined without replacing the helical guide, so that the manufacturing efficiency of gears can be significantly improved.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional front view of a pinion cutter lifting/rotating mechanism incorporating a helical guide according to the present invention, and FIG.
Figure 1 is a cross-sectional view taken along line 1-1, Figure 3 is a cross-sectional view taken along line ■-■ in Figure 1, Figure 4 is a developed view of the guide case with a built-in helical guide, and Figure 5 is the same plane. Figure 6 is a cross-sectional front view of the guide case, Figure 7 is a developed view of the guide case alone, Figure 8 is a plan view of the helical guide, Figure 9 is a cross-sectional side view, and Figure 10 is a developed view of the same. , Fig. 11 is a front view of the beam guide setting block, Fig. 12 is a sectional view taken along line □m-■ in Fig. 1I, and Fig. 13 is a sectional front view of a gear shaper having a conventional helical guide. . In the figure, 10: cutter spindle lQa: cutter mounting shaft 11: pinion cutter 12: helical guide 20: cank head 21: rotation support cylinder 22: worm wheel 23: cover 24 guide case 25: helical guide 26: pole joint 27. 28.29 Ni block mounting opening 30, '31.
32: Moving block 34.35.36F inclined groove 37: Support bin 38: Pressure oil chamber 40.41.42: Annular groove 44: Passage 45: Pressure oil supply pipe 46: Spring 50.51, 52: Engagement protrusion

Claims (1)

[Claims] 1. In a helical guide structure consisting of a helical guide to which a cutter mounting shaft is fixed integrally, and a guide case in which the helical guide is mounted inside so that it can be raised and lowered and rotated freely, there are grooves on the outer circumferential surface of the helical guide at equal circumferential pitches. , a plurality of inclined protrusions having different inclination angles with respect to the axis of the helical guide are provided, a block mounting opening extending in the radial direction is provided in the guide case at a position corresponding to all the above-mentioned inclined protrusions, and a lead is installed in the opening. A setting block is disposed so as to be selectively movable toward the inclined protrusion, and a plurality of inclined grooves capable of engaging with the inclined protrusion are provided on the inner surface of each lead setting block. Helical guide structure of gear shaper.