JPH0413066Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to an improvement of a gear chamfering tool.

(Prior Art) In a gear, for example, a helical gear, the peripheral edge of the end face of the tooth portion is crushed by a gear chamfering tool to chamfer that portion. As shown in Japanese Utility Model Application Publication No. 61-96624, such chamfering tools include an adjustment nut with a female thread carved at a constant lead angle on the inner surface, and an adjustment nut attached to the inner periphery of one end of the adjustment nut. an annular cutting tool having a pressing tooth portion extending radially outwardly through the adjusting nut on the outer circumferential side of the adjusting nut; and an annular cutting tool having a pressing tooth portion extending outward in the radial direction of the adjusting nut at the other end side. With this configuration, when the other cutting tool is rotated with respect to the adjusting nut, one cutting tool and the other cutting tool will be displaced relative to each other in the axial direction of the adjusting nut with a constant lead angle. Under the lead angle, it is possible to adjust the width between the pressing teeth of one cutting tool and the pressing teeth of another cutting tool.

(Problem to be solved by the invention) However, in the above chamfering tool, since the width between the two push-down teeth is adjusted under a single lead angle, the lead angles of the gears to be chamfered are different. In this case, it is necessary to prepare another chamfering tool that can adjust the width between the pressing teeth under the different lead angle.

The present invention was developed in view of the above circumstances, and its purpose is to provide a gear chamfering tool that can adjust the width between a pair of pressing teeth for each of a plurality of different lead angles.

(Means and actions for solving the problem) In order to achieve the above object, the present invention includes a cylinder in which a plurality of lead grooves with different lead angles are formed on the outer circumferential surface, and a cylinder on the outer peripheral side of the cylinder. a pair of annular bodies that are slidable in the axial direction of the cylindrical body and rotatable about the axial center of the cylindrical body, and have pressing teeth on the outer peripheral side; A gear chamfering tool is characterized in that it comprises a guide pin that is provided and selectively protrudes into any one of the plurality of lead grooves.

With this configuration, by protruding each guide pin of each annular body into any one of the plurality of lead grooves, each annular body can move in the axial direction of the cylindrical body under each constant lead angle. It will be possible to make a relative displacement.

(Example) Examples of the present invention will be described below.

In FIGS. 1 to 3, 1 is a gear chamfering tool according to the present invention. In this tool 1, 2 is a cylindrical body, and a rotating shaft (not shown) is fitted into the inner periphery of this cylindrical body 2. On the other hand, a plurality of lead grooves 3 are formed in a helical shape on the outer peripheral surface of the cylindrical body 2. The lead grooves 3 have different lead angles in consideration of the type of gear to be chamfered, and the lead grooves 3 are provided at predetermined intervals in the circumferential direction of the cylindrical body. Moreover, each lead groove 3 extends over the entire range in the direction of the axis O of the cylindrical body 2, and each lead groove 3 is open on both end surfaces of the cylindrical body 2.

A pair of annular bodies 4 are fitted onto the outer periphery of the cylindrical body 2 . Each of the annular bodies 4 has the same configuration, and for convenience of explanation, only one of the annular bodies 4 will be explained, and the other annular body 4 will be given the same reference numerals and the explanation thereof will be omitted. The annular body 4 includes an annular cutter holder 5 and an annular cutter 6 as a pressing tooth portion.
It consists of. The cutter holder 5 is fitted so that its inner circumference can slide on the outer circumference of the cylindrical body 2 and is rotatable relative to the cylindrical body 2 about the axis O of the cylindrical body 2. A flange portion 5a is provided. The cutter 6 is fitted onto the outer periphery of the cutter holder 5 so as to be in contact with the flange portion 5a, and the flange portion 5a and the cutter 6 are fixed with bolts 7. A spline portion 6a is formed on the outer circumferential side of the cutter 6, and the spline portion 6a crushes the end face peripheral edge of the tooth portion of the gear to be chamfered.

Each cutter holder 5 is provided with a guide pin 8, respectively. This guide pin 8 is screwed into the cutter holder 5, and its tip can move forward and backward along the radial direction of each cutter holder 5 in accordance with its rotation. The outer diameter of the tip of the guide pin 8 is slightly smaller than the groove width of each lead groove 3, and the tip can protrude into each lead groove 3. When the cutter holder 5 protrudes into the cylindrical body 3, the cutter holder 5 hardly shakes relative to the cylindrical body 2 in the circumferential direction of the cylindrical body 2.

Further, each cutter holder 5 is provided with a set screw 9, and each set screw 9 determines whether sliding of the cutter holder 5 with respect to the cylindrical body 2 is permitted or prohibited.

Therefore, in order to chamfer a gear using the gear chamfering tool 1, first select the lead groove 3 corresponding to the lead angle of the gear to be chamfered, and then insert a groove into both the annular bodies 4 into the lead groove 3. The distal end of the provided guide pin 8 is made to protrude. In order to make the tip of each guide pin 8 protrude into the lead groove 3, both the annular bodies 4 are fitted onto the outer periphery of the cylindrical body 2, and the lead groove 3 is positioned so that the lead groove 3 faces the forward and backward movement area of each guide pin 8. Each annular body 4 is rotated about the axis of the annular body 4 with respect to the cylindrical body 2, and then each guide pin 8 is rotated.
It is only necessary to advance the cutter holders 5 inward in the radial direction of each cutter holder 5. Alternatively, each guide pin 8 is advanced inward in the radial direction of each cutter holder 5, and then each annular body is moved so that the tip of each guide pin 8 enters the groove opening of the lead groove 3. 4 may be fitted onto the outer periphery of the cylindrical body 2 from the end side of the cylindrical body 2.

Thereafter, each annular body 4 is slid on the cylindrical body 2 to adjust the width interval between the two cutters 6. At this time,
The width interval between the cutters 6 can be freely adjusted under the given lead angle because each annular body 4 slides on the cylindrical body 2 while being guided by the lead groove 3. After this, each set screw 9
Each annular body 4 is fixed to the cylindrical body 2 by.
Thereby, the width interval between both cutters 6 is adjusted under the constant lead angle.

In order to adjust the width interval between the cutters 6 under a different lead angle from the above state, each set screw 9 is loosened and each guide pin 8 is moved out of the corresponding lead groove 3. After that, each annular body 4 is rotated relative to the cylindrical body 2 around the axis of each annular body 4 so that the forward and backward movement area of each guide pin 8 is located on the other lead groove 3. , the tip of each guide pin 8 faces into the other lead groove 3. Then, each annular body 4 is slid relative to the cylindrical body 4 to adjust the width interval between both cutters 6, and each annular body 4 is moved to each set screw 9.
It is fixed to the cylindrical body 2 by. This results in
The width interval between both cutters 6 is adjusted in the other lead groove 3 having a different lead angle. In order to make each guide pin 8 face into this different lead groove 3, instead of using the above-mentioned method, each annular body 4 is made into a cylindrical body with each guide pin 8 facing into the lead groove 3. 2, and then fit each annular body 4 onto the outer periphery of the cylindrical body 2 from the end side of the cylindrical body 2 so that each guide pin 8 enters the groove opening of the other lead groove 3. good.

In this way, the width interval between the two cutters 6 can be adjusted for each of a plurality of lead angles, and this can be selected depending on the gear to be chamfered. When the gear and the tool are engaged with each other and rotated, the peripheral edge of the end face of the tooth of the gear is crushed and chamfered.

(Effect of the invention) As described above, in the present invention, if each guide pin of each annular body faces into each lead groove, each annular body can
Since the cylindrical body can be relatively displaced in the axial direction under each fixed lead angle, the width interval between the pair of pressing teeth can be adjusted for each of a plurality of different leads.

[Brief explanation of drawings]

Fig. 1 is a sectional view taken along the line - - of Fig. 2, Fig. 2 is a side view showing a gear chamfering tool according to the present invention, and Fig. 3 is a partially enlarged partially sectional front view showing the gear chamfering tool according to the present invention. be. 1... Gear chamfering tool, 2... Cylindrical body, 3...
Lead groove, 4... a pair of annular bodies, 8... guide pin.

Claims (1)

[Claims for Utility Model Registration] A cylindrical body in which a plurality of lead grooves with different lead angles are formed on the outer peripheral surface, and a cylindrical body that is slidable in the axial direction of the cylindrical body on the outer periphery side of the cylindrical body. a pair of annular bodies that are rotatably provided around the axis of the body and have pressing teeth on the outer periphery; A gear chamfering tool comprising: a guide pin that protrudes from the top;