JPH03213212A - Gear meshing device - Google Patents

Abstract

PURPOSE:To easily mesh a rotary tool with a gear having no splines or the like so as to improve a degree of freedom of designing a gear despite its relatively simple structure and a low cost by providing such constitution as electrically positioning a rotary tool side and mechanically positioning a workpiece side. CONSTITUTION:After a gear 2 is mounted on a rotary shaft 6, a cutter 1 and the gear 2, are respectively positioned by a tool phase detecting device 7 and a positioning block 10 while they are rotated by motors 3, 4. The cutter 1 is integrally formed by a key 12 and positioned by a rotational angle of a rotary shaft 5, and the gear 2 is only tightened to the rotary shaft 6 and drive- positioned in a direction of rotation by rotating the gear 2 by the motor 4 and by moving the positioning block 10 to be meshed with a tool groove 2a. When the cutter 1 and the gear 2 are placed in a position relation possible to mesh with each other, the cutter 1 is meshed with the gear 2 without being displaced by shortening a distance between the cutter 1 and the gear 2 by an actuator.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a gear meshing device used in a gear processing machine such as a gear shaving machine or a hobbing machine that processes a gear-shaped workpiece using a rotating tool.

<Conventional technology> Gear processing machines include those that generate gears from a workpiece using a reciprocating rack cutter, such as a work-type gear shaping machine, and those that generate gears from a workpiece, such as a gear shaving machine or hobbing machine. There are tools that perform shaping and creation of gears using rotating tools such as the following. Among gear processing machines that process gears with rotating tools, those that use rotating tools to finish workpieces that have already been rough-machined into gear shapes are designed to prevent damage to the rotating tools and workpieces, and to improve machining accuracy. In order to maintain this, it is necessary to align or mesh these.

The structure of a conventional gear meshing device attached to a gear shaving machine will be explained with reference to FIGS. 2 and 3.

In the one shown in FIG. 2, a rotating tool, ie, a shaving cutter (hereinafter simply referred to as a cutter) 1, and a workpiece, ie, a gear to be processed (hereinafter simply referred to as a gear) 2 are driven by motors 3 and 4, respectively. It is equipped with a tool phase detection device 7 and a workpiece phase detection device 8, which are rotational phase detection means for electrically detecting the rotational phase of each rotating shaft 5.6. In this device, while the cutter 1 and gear 2 are rotationally driven by a motor 3.4, when the cutter 1 and gear 2 reach reference points p, p2, respectively, that is, the rotation axis 5.6 reaches a predetermined rotation angle. The rain detection devices 7 and 8 detect that the rain has occurred, and the driving of the motors 3 and 4 is stopped. Then, the cutter 1 and the gear 2 are driven by a drive device (not shown).
Displace (shorten) the center-to-center distance giL to mesh them.

The one shown in FIG. 3 is similar to the one described above in that the cutter 1 and the gear 2 are each driven by a motor 3.4, but this one uses a positioning block 9.10 as a mechanical tool positioning means. A zero positioning block 9.10 for positioning the cutter 1 and the gear 2 is moved vertically and horizontally in the figure by an actuator (not shown) using hydraulic pressure or pneumatic pressure. Then, the cutter 1 and the gear 2 are engaged with the tooth grooves 1a and 2a to drive them and position them at a predetermined rotation angle. After that, cutter 1 and gear 2 are cutter 1 and gear 2 in the same way as the above-mentioned device.
The distance between the shafts giL is shortened, and these are meshed together.

<Problems to be Solved by the Invention> By the way, each of the conventional gear meshing devices described above has the following disadvantages.For example, in the former electric type, the rotation shaft 5 of the gear 2fl. In order to detect the rotational phase by the workpiece phase detection device 8, it is necessary not only to simply attach the gear 2 to the rotation shaft 5 but also to use a key 11 or the like to keep the relative angle constant. Therefore, it is necessary to form a keyway 2b in the gear 2 into which the key 11 fits, but this may make it impossible to process gears with a spline six or the like formed in the center or small-diameter gears, or may cause problems in gear design. I ended up being subject to the above restrictions. Note that even if the cutter 1 and the rotating shaft 5 are connected using a key 12 or the cutter 1 and the rotating shaft 6 are formed integrally in advance, the cutter 1 itself is not frequently replaced and the cutter l
Since it is originally manufactured exclusively for the processing machine, the above-mentioned problems do not occur, and since it is only necessary to attach the detection device N7 to the rotating shaft 6, it is advantageous in terms of cost.

On the other hand, in the latter mechanical type, the gear 2 can be fixed by tightening, etc., so there is a problem that the shape of the gear 2 is restricted (a keyway etc. must be provided) like the former. However, with this device, in addition to the positioning blocks 9 and 10, it was necessary to provide two sets each of actuators, hydraulic (or pneumatic) piping, control mechanisms, etc., resulting in an increase in cost. .

In particular, the structure of the cutter 1 side was extremely complicated, making it difficult to manufacture and adjust the machine.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a gear meshing device that is relatively simple and low-cost and does not impose any shape constraints on the workpiece.

Means for Solving the Problem> Therefore, in order to solve this problem, the present invention provides a gear meshing device used in a gear processing machine that processes a gear-shaped workpiece with a rotating tool, which comprises: A tool driving means for rotationally driving a rotary shaft; a tool rotational phase detection means for electrically detecting the rotational phase of the rotary tool and positioning it at a predetermined rotational angle; a workpiece positioning means for driving and positioning at a predetermined rotational angle, and with the rotary tool and the workpiece being respectively positioned by the tool positioning means and the workpiece positioning means, displacing the distance between the axes of the rotary tool and the workpiece; The present invention proposes a gear meshing device characterized by comprising a meshing means for meshing these gears.

<Example> An example of the present invention will be specifically described based on the drawings. In the description of the embodiment, the same members as those in the conventional example described above will be denoted by the same reference numerals, and redundant explanation will be omitted.

FIG. 1 conceptually shows a gear meshing device according to the present invention.

The gear meshing device of this embodiment is also attached to a gear shaving board like the device described above. As shown in this figure, in the gear meshing device of this embodiment,
The cutter 1 side is provided with a motor 3 as a tool driving means for driving the rotating shaft 5 of the cutter 1 and a tool phase detection device 7 as a tool rotation phase detection means, and the gear 2 side is provided with a motor 4 and a workpiece positioning device that rotationally drives the workpiece. A positioning block 10 is provided as a means.

The tool phase detection device 7 outputs a reference signal (one pulse per rotation) when the rotating shaft 5 reaches a predetermined rotation angle, that is, a reference point P, and stops the motor 3 upon receiving this reference signal. It is something. Further, the positioning block 10 is fitted into the tooth groove 2a of the gear 2 by the rotation of the motor 4 and the driving force of an actuator (not shown) in the vertical and horizontal directions.
is positioned at a predetermined rotation angle. and,
A cutter 1 positioned by a tool phase detection device 7;
The gears 2 positioned by the positioning block 1O are adjusted to have a positional relationship in which they mesh with each other. Note that the cutter 1 and its rotating shaft 5 are prevented from rotating using a key 12, but the gear 2 and its rotating shaft 6 are prevented from rotating.
It is fixed by tightening a ring nut (not shown).

The operation of this embodiment will be described below.

In this embodiment, after the gear 2 is attached to the rotating shaft 6, the cutter 1 and the gear 2 are rotated by the motors 3 and 4 and positioned by the tool phase detection device 7 and the positioning block 10, respectively. Since the cutter 1 is integrated with the rotary shaft 5 and the key 12 interposed therebetween as described above, positioning is actually performed using the rotation angle of the rotary shaft 5. Further, although the gear 2 is simply tightened to the rotating shaft 6, the rotation of the gear 2 by the motor 4 and the movement of the positioning block 10 cause the positioning block IO to mesh with the tooth groove 2a and drive the gear in the rotational direction. - Positioned.

When the cutter 1 and the gear 2 are positioned, they are in a positional relationship in which they can mesh with each other as described above. Therefore, in this device, the center-to-axis distance between the cutter 1 and the gear 2 is shortened using an actuator (not shown) as in the conventional device described above. As a result, the cutter 1 and the gear 2 mesh without coming apart.

This concludes the description of the embodiment, but the aspect of the present invention is not limited to this embodiment. For example, instead of the positioning block, a gear-shaped workpiece positioning means may be used, and the positioning may be performed by vertically and rotationally driving the workpiece positioning means. The motor for driving the workpiece may be abolished.
In the above embodiment, the present invention is applied to a gear shaving machine that has a gear-shaped shaving cutter, but it is also applicable to a gear shaving machine that uses a pinion cutter, a hobbing machine that uses a hob that is a spiral tool, etc. may be adopted.

4 <Effects of the Invention> According to the gear meshing device according to the present invention, the rotary tool side is electrically positioned while the workpiece side is mechanically positioned, so the configuration is relatively simple and low cost. However, it becomes possible to easily mesh the rotary tool with a gear that does not have a keyway or the like, improving the degree of freedom in gear design.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram showing a gear meshing device according to the present invention, and FIGS. 2 and 3 are both conceptual diagrams showing a conventional gear meshing device. In the drawings, 1 is a shaving cutter, 2 is a gear to be processed, 3.4 is a motor, 5.6 is a rotating shaft, 7 is a tool phase detection device, and 10 is a positioning block. Figure 1: Positioning block Figure 2: η■ Industrial Army Figure 3: Positioning block

Claims (1)

[Scope of Claims] A gear meshing device used in a gear processing machine that processes a gear-shaped workpiece with a rotary tool, comprising: a tool driving means for rotationally driving a rotation shaft of the rotary tool; and a rotation of the rotary tool. tool rotation phase detection means that electrically detects the phase and positions the workpiece at a predetermined rotational angle; workpiece positioning means that engages with a workpiece and rotationally drives the workpiece to drive and position the workpiece at a predetermined rotational angle; and the tool positioning means. A gear comprising: an engaging means for displacing the distance between the axes of the rotary tool and the workpiece to engage them in a state where the rotary tool and the workpiece are respectively positioned by the means and the workpiece positioning means. interlocking device.