JPH0596591U - Bevel gear support device - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the adjustment of the meshing allowance of a bevel gear without requiring a large tool insertion space. [Configuration] Bevel gear shaft 4 having a bevel gear 5 at one end
Is installed on the rolling bearing 6 so as to be movable in the axial direction. A disc spring 8 is interposed between the inner ring of the rolling bearing 6 and the bevel gear 5, and a male screw portion 4a formed on the other end of the bevel gear shaft 4 is formed.
Then, the nut 9 that engages with the inner ring of the rolling bearing 6 is screwed. When the nut 9 is rotated to the tightening side, the bevel gear 5 moves to the bearing 6 side against the biasing force of the disc spring 8, and the meshing allowance with the bevel gear 3 becomes small. On the contrary, when the nut 9 is loosened, the bevel gear 5 moves in the direction of increasing the meshing allowance.
Moves. Therefore, the meshing allowance of the bevel gear 5 can be adjusted only by rotating one nut 9.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bevel gear support device used for a drive system of a rotary tool of a turret lathe and other general rotation transmission systems.

[0002]

[Prior Art]

 FIG. 2 is a sectional view showing a rotation transmission system for a rotary tool in a conventional turret lathe. In the figure, the rotary tool drive shaft 22 provided at the shaft center of the turret 21 has a bevel gear 23 at its tip, and the bevel gear 23 is connected to one end of a shaft 24 arranged perpendicularly to the turret shaft center. A driven bevel gear 25 that meshes is provided. The rotation of the rotary tool drive shaft 22 is transmitted to the shaft 24 via the bevel gear 23 and the driven bevel gear 25, and the rotation of the shaft 24 is a rotary tool (not shown) provided on the tool station S on the peripheral surface of the turret 21. ) Is transmitted to.

The shaft 24 of the driven bevel gear 25 is supported by a rolling bearing 26 supported by a bearing support case 27, and the bearing support case 27 is slidable in the direction of the shaft 24. It is held by the case holding member 28 in a fixed state. The outer end of the bearing support case 27 is fastened and fixed by a bolt 29 to a flange 28a formed on the outer end of the case holding member 28. A nut 31 that engages with the inner ring of the rolling bearing 26 is screwed to the male screw portion 24a formed at the rear end of the shaft 24 via the seal inner member 30a.

To adjust the meshing allowance of the driven bevel gear 25 with respect to the bevel gear 23, the bolt 29 that fastens and fixes the bearing support case 27 to the flange 28 a of the case holding member 28 is rotated to move the bearing support case 27 including the driven bevel gear 25. This is done by moving the whole in the direction of the axis 24.

[0005]

However, in the conventional bevel gear support structure described above, it is necessary to rotate the bolts 29 of the respective parts in order to adjust the meshing allowance of the driven bevel gear 25, and the bolts 29 of the respective parts are located at the inner side of the shaft 24. The bolt 29 that operates must also be operated. Therefore, the internal space 32 opened on the front surface of the turret 21 must be wide enough to operate the bolt 29 on the back side by inserting a tool such as a wrench or a spanner, and the turret 21 becomes large. There was a problem that it would end up.

An object of the present invention is to provide a bevel gear supporting device that can easily perform the adjusting operation without requiring a large tool use space for adjusting the meshing allowance.

[0007]

[Means for Solving the Problems]

 In the bevel gear support device of the present invention, a bevel gear shaft having a bevel gear at one end is installed in a rolling bearing so as to be movable in the axial direction, and a disc spring is interposed between the inner ring of the rolling bearing and the bevel gear. A nut that engages with the inner ring of the rolling bearing is screwed onto a male screw portion formed at the end.

[0008]

[Action]

 When the nut is turned to the tightening side, the bevel gear moves to the bearing side against the biasing force of the disc spring. Therefore, the meshing allowance with another bevel gear that meshes with this bevel gear is reduced by the amount of movement. Conversely, when the nut is loosened, the bevel gear moves in the direction that increases the meshing allowance.

[0009]

【Example】

 An embodiment of this invention will be described with reference to FIG. This embodiment is applied to a drive transmission system for a rotary tool (not shown) in a turret lathe. The turret 1 is rotatably supported around the turret axis O and is provided with a rotary tool drive shaft 2 driven by a motor. The rotary tool drive shaft 2 has a bevel gear 3 at its tip and meshes with a driven bevel gear 5 of a bevel gear shaft 4 in a direction orthogonal to the bevel gear 3. The bevel gear shaft 4 is an air shaft having splines formed on the inner surface thereof, and a spline shaft 11 penetrating the shaft 4 transmits rotation to a rotary tool (not shown) in the tool station S of the turret 1. The spline shaft 11 is moved forward and backward by a cylinder device (not shown) to be engaged with and disengaged from the drive input portion of the rotary tool.

This bevel gear support device is applied to support the driven bevel gear 5 described above. That is, the bevel gear shaft 4 of the driven bevel gear 5 is fitted in the inner ring 6a of the rolling bearing 6 installed in the bearing support case 7 with a loose fitting allowance so as to be rotatably supported by the bearing 6 and the inner ring 6a is axially centered. It can be moved in any direction. The driven bevel gear 5 is in contact with the bearing inner ring 6a via a plurality of disc springs 8. A nut 9 is screwed onto a male screw portion 4a formed at the rear end of the bevel gear shaft 4, and the nut 9 is fastened to the bearing inner ring 6a via a seal inner member 10 of a labyrinth seal.

According to this configuration, the meshing allowance of the driven bevel gear 5 with respect to the bevel gear 3 is adjusted by rotating one nut 9 as follows. That is, when the nut 9 is rotated to the tightening side, the driven bevel gear 5 moves to the bearing 6 side against the biasing force of the disc spring 8, and the meshing allowance with the bevel gear 3 becomes small. Conversely, when the nut 9 is loosely tightened, the driven bevel gear 5 moves on the side where the meshing allowance increases.

Since the meshing allowance can be adjusted by rotating the central nut 9 in this manner, it is not necessary to rotate the bevel gear shaft to the inner side as in the conventional case, and the rotating operation can be performed. Does not require extra tool insertion space. Therefore, the internal space 12 of the turret 1 can be small, the turret 1 can be downsized, and the adjustment operation of the meshing allowance can be easily performed.

[0013]

[Effect of the device]

 In the bevel gear support device of the present invention, a bevel gear shaft having a bevel gear at one end is installed in a rolling bearing so as to be movable in the axial direction, and a disc spring is interposed between the inner ring of the rolling bearing and the bevel gear. Since the nut that engages with the inner ring of the rolling bearing is screwed onto the male thread formed at the end, the meshing allowance of the bevel gear with other bevel gears can be adjusted by only rotating one nut of the bevel gear shaft. be able to. Therefore, the meshing allowance can be easily adjusted without requiring an extra tool placement space.

[Brief description of drawings]

FIG. 1 is a sectional view of a turret portion of a turret lathe to which a bevel gear support device according to an embodiment of the present invention is applied.

FIG. 2 is a sectional view of a conventional example.

[Explanation of symbols]

4 ... driven bevel gear, 4a ... male screw part, 5 ... bevel gear, 6 ... rolling bearing, 6a ... inner ring, 8 ... disc spring, 9 ... nut

Claims (1)

[Scope of utility model registration request] 1. A bevel gear shaft having a bevel gear at one end is installed on a rolling bearing so as to be movable in the axial direction, and a disc spring is interposed between an inner ring of the rolling bearing and the bevel gear.
A bevel gear support device in which a male thread portion formed at the other end of the bevel gear shaft is screwed with a nut that engages with the inner ring of the rolling bearing.