JP2559196Y2 - 3-piece coupling structure of revolving superstructure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a general machine tool for rotating indexing, and more particularly to a three-piece coupling structure of a revolving body of a machine tool such as a turret.

[0002]

2. Description of the Related Art A three-piece coupling swivel shown in FIG. 3 in which the axial movement of a heavy turret performed during a swivel indexing time in a machine tool is replaced by the axial movement of a lightweight indexing clutch part. An indexing mechanism has been developed. In FIG. 3, a turret body 1 is fixedly mounted on a turret shaft 3 rotatably supported by ball bearings in a turret base 2. The turret body 1 is connected to the intermediate shaft 5, a small gear 19 provided at one end thereof by an electric motor 4, and provided on the outer periphery of an annular turning side indexing clutch 6 fixed to the back side of the turret body 1. Gear 2
0, indexing drive via the turning side indexing clutch 6. On the left end face of the turning side indexing clutch 6 in FIG. 3, a flat meshing tooth 10 such as a carbic gear is engraved. The turret base 2 is provided with a concentric annular hydraulic cylinder 13 outside the turret shaft 3, and an annular fixing index clutch 8 is attached to an annular hydraulic piston 7 fitted on the cylinder 13 on the back side of the turret body 1. , And a meshing tooth 11 that engages with the meshing tooth 10 is engraved on the right end face in FIG.

[0003] An annular stationary side indexing clutch 9 is provided concentrically inside the turning side indexing clutch 6 on the turret base 2 in order to accurately maintain the indexing angle position in the rotation direction when the turret body 1 is clamped. A meshing tooth 12 which is arranged in parallel with the meshing tooth 10 of the revolving side indexing clutch 6 and is simultaneously engaged with the meshing tooth 11 of the fixing indexing clutch 8 is formed on the axial end face. The angular position of the meshing teeth 12 of the stationary side indexing clutch 9 is immovable and constant.

When the right hydraulic chamber 15 is set at a high pressure, the hydraulic piston 7 moves the fixing index clutch 8 fixed to one end thereof axially to the left in the axial direction, and engages with the meshing teeth 11 of the fixing index clutch 8 and the turret. The engagement of the turning-side clutch 6 fixedly connected to the body 1 with the meshing teeth 10 is released, and the turning-side indexing clutch 6, that is, the turret body 1 can be freely turned. On the other hand, the turret body 1, that is, the turning side indexing clutch 6, is driven by the electric motor 4 and brought to the approximate indexing position. Next, the left hydraulic chamber 16 is set at a high pressure, the hydraulic piston 7 and the fixing indexing clutch 8 move rightward, the meshing teeth 11 engage with the meshing teeth 10 and the meshing teeth 12, and the rotating index, which has been roughly positioned, is set. The meshing teeth 10 of the clutch 6 are the meshing teeth 1 of the fixing index clutch 8.
When it is brought in line with the meshing teeth 12 of the stationary side indexing clutch 9 by 1, the indexing clamp is completed.

[0005]

The meshing teeth 12 of the stationary indexing clutch 8 mesh with the meshing teeth 12 of the stationary side indexing clutch 9 and the meshing teeth 10 of the revolving side indexing clutch 6 for positioning. A considerable force is applied to the fixing indexing clutch 8 and the lifting force acts to cause the outside to be warped, so that the clamping force between the meshing teeth 10 and the meshing teeth 11 and 12 is not uniform, and a portion where the clamping force is weak appears to index. In some cases, the accuracy was poor. The present invention has been made in view of the above-mentioned problems of the prior art. The purpose of the present invention is to eliminate the influence of deformation due to the clamping force of the fixing index clutch and to transmit a reliable clamping force to the turret. An object of the present invention is to provide a three-piece coupling structure of a revolving superstructure with improved indexing accuracy.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a machine which is provided with a rotary indexing position.
Is provided concentrically with the pivot axis of the rotating
A fixed first clutch having a projection meshing tooth;
The outer surface of the first clutch is provided on the upper surface provided on the outer periphery of the lower part of the rotating body.
The same number of annular indexing teeth at positions that are concentric on the side
A second clutch on the turning side having
Piston of annular cylinder provided inside one clutch
The first clutch and the second clutch are provided at the upper end of a rod.
A third clutch having a detachable meshing tooth crown on a lower surface;
A three-piece coupling comprising:
The second clutch and the second clutch.
The upper surface of the crown tooth plate at an intermediate position between the meshing teeth of the clutch and the third clutch
Contact with one of the contact surfaces with the lower surface of the switch body with a narrow width
Forming an annular protrusion, the third clutch body and the crown tooth plate;
Is attached with multiple bolts via spherical washers,
This absorbs the warpage of the outer peripheral portion when the third clutch body is engaged .

[0007]

When the indexing clutch for engagement meshes with the clutch of the revolving unit and the clutch of the machine base, the indexing clutch for fixing is warped by the clamping force, but the meshing teeth are supported by the annular projection of the contact surface having a narrow width and are spherical. Since the teeth are connected by bolts via washers, the meshing teeth are not affected by the warp and the meshing is performed uniformly.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below with reference to FIGS. The same reference numerals are given to the parts described in the related art, and the description is omitted.
The fixing index clutch 8 and the meshing teeth 11 are separated,
On the surface of the indexing clutch 8 for fixing, centering on a circle substantially at the center of the ring-shaped meshing teeth 11, the cross section of the annular portion in the diametrical direction is an arc shape or a surface having a narrow contact width, or a mountain shape having an arc on the top surface. Of the annular projection 14 of the fixing index clutch 8
Formed on the mating side surface. A plurality of counterbored bolt holes are drilled at equal angular positions on the circumference of the fixing indexing clutch 8, and screw holes corresponding to the annular meshing teeth 11 are also engraved. A pair of male and female spherical washers 17 having a spherical contact surface are interposed in the counterbore holes, bolts 18 are inserted, screwed into the screw holes of the annular meshing teeth 11, and connected integrally. The meshing teeth 11 are crowned at both ends of the tooth surface.

With this configuration, when the turret is indexed from the clamped state, high-pressure oil is sent to the cylinder chamber 15 and the piston 7 and the fixing indexing clutch 8 are sent.
Are moved in the axial direction to disengage the clutch. Next, when the gear 20 is turned by the rotation of the motor 4 and the turret 1 is indexed at a substantially predetermined angle, the high pressure oil is switched to the cylinder chamber 16 side, the indexing clutch 8 for fixing the piston 7 is retracted, and the meshing teeth 11 are meshed. 10 and 12 are engaged simultaneously. At this time, the fixing indexing clutch 8 is warped by the strong clamping force and is deformed in the direction in which the outer peripheral side is opened. However, since the meshing teeth 11 are pressed by the narrow width surface of the annular projection 14, the displacement is absorbed and the meshing teeth are deformed. Is not transmitted. The bolt 18 for tightening is the spherical washer 1
Since it is tightened through 7, the twist is absorbed in the tightening portion.

[0010]

According to the above construction, the clamping force of each meshing tooth on the clutch surface acts uniformly over the entire circumference, and a stable indexing accuracy can be obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view of the structure of the present invention.

FIG. 2 is an enlarged explanatory view of a main part.

FIG. 3 is a diagram showing a conventional structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Turret 2 Turret base 6 Revolving side indexing clutch 7 Piston 8 Fixed indexing clutch 9 Stationary side indexing clutch 10, 11, 12 Mesh teeth 14 Annular protrusion 17 Spherical washer 18 Bolt

Claims (1)

(57) [Scope of request for utility model registration] A rotating index positioning device provided on a machine base;
Is provided concentrically with the pivot axis of the rotating
A fixed first clutch having a projection meshing tooth;
The outer surface of the first clutch is provided on the upper surface provided on the outer periphery of the lower part of the rotating body.
The same number of annular indexing teeth at positions that are concentric on the side
A second clutch on the turning side having
Piston of annular cylinder provided inside one clutch
The first clutch and the second clutch are provided at the upper end of a rod.
A third clutch having a detachable meshing tooth crown on a lower surface;
A three-piece coupling comprising:
The second clutch and the second clutch.
The upper surface of the crown tooth plate at an intermediate position between the meshing teeth of the clutch and the third clutch
Contact with one of the contact surfaces with the lower surface of the switch body with a narrow width
Forming an annular protrusion, the third clutch body and the crown tooth plate;
Is attached with multiple bolts via spherical washers,
A three-piece coupling structure for a revolving superstructure, wherein a warp of an outer peripheral portion when the third clutch body is engaged is absorbed .