JPH07213006A - Rotating shaft connecting device - Google Patents

Abstract

(57) [Abstract] [Purpose] The shaft end dimension of the connecting shaft of the auxiliary machine connected to the main shaft can be freely changed, and the connecting torque is also increased. [Structure] A bearing 2 is attached to a bracket 1 of a rotating machine.
A spindle cylindrical projection 5 protruding from the annular end surface 4 of the spindle 3 is fitted to a part of the inner ring 2b in the axial direction. Spindle cylindrical protrusion 5
A plurality of concavities and convexities 6 are provided on the end surface of, and a screw hole 7 is provided in the end axis of the main spindle cylindrical projection 5. The connecting shaft cylindrical protrusion 13 protruding from the annular end surface 12 of the connecting shaft 11 is fitted to the remaining part of the inner ring 2b in the axial direction with which the main shaft cylindrical protrusion 5 is fitted.
A bolt 14 for inserting the connecting shaft 11 is tightened into the screw hole 7, and the end face of the connecting shaft cylindrical projection 13 is plastically deformed and connected to the unevenness 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary shaft coupling device for mounting auxiliary equipment such as a detector and a brake device to a main shaft supported by bearings of a rotary machine such as a rotary electric machine and a gear device. The present invention relates to one used when connecting a connecting shaft whose end dimensions and shapes can be freely changed.

[0002]

2. Description of the Related Art As a conventional technique of a rotary shaft connecting device for mounting an auxiliary device such as a detector on a main shaft of a rotary electric machine, an actual method is disclosed.
Japanese Laid-Open Patent Publication No. 3-202167 and Japanese Utility Model Laid-Open No. 1-150455 are known. The former is to attach a rotation transmission component to the linear or cross-shaped convex or concave part of the end face of the rotating shaft near the bearing with an adhesive, and the latter is the hole on the end face of the rotating shaft near the bearing and the screw inside it. It is composed of an end portion of a connecting shaft that is fitted into and screwed into each hole, and a set screw provided in the radial direction of the hole.

[0003]

In the former case, the convex portion or the concave portion is attached with an adhesive, so that the transmission torque is low, and in the latter case, the torque determined by the pressing force of the set screw is low in the rotational direction in which the screw hole is loosened. An object of the present invention is to provide a rotary shaft connecting device which can freely change the shaft end size and shape of a connecting shaft of an auxiliary machine connected to a main shaft and can also increase the connecting torque.

[0004]

A rotary shaft coupling device according to a first aspect of the present invention has a main shaft cylindrical shape in which a main shaft cylindrical projection protruding from an annular end surface of a main shaft is fitted to a part of an inner ring of a rolling radial bearing in an axial direction. Multiple protrusions and recesses are provided on the end face of the protrusion, a screw hole is provided on the end axis of the spindle cylindrical protrusion, and a ring of the connecting shaft is attached to the remaining part of the axial direction of the inner ring into which the spindle cylindrical protrusion fits. The connecting shaft cylindrical protrusion protruding from the end face is fitted, a bolt for inserting the connecting shaft is tightened into the screw hole, and the end face of the connecting shaft cylindrical protrusion is plastically deformed and connected to the unevenness.

In the rotary shaft connecting device of the second aspect of the present invention, instead of providing the concavities and convexities on the end surface of the main shaft cylindrical projection, the concavities and convexities are provided on the end surface of the connection shaft cylindrical projection.

[0006]

According to the invention 1, when the bolt for inserting the connecting shaft is tightened in the screw hole of the main shaft, the main shaft cylindrical projection and the connecting shaft cylindrical projection are fitted to the inner ring of the rolling radial bearing at the same time. Since both ends of the inner ring are abutted and tightened between the annular end faces, the main shaft and the connecting shaft are positioned on the same axial center via the inner ring. At this time, the end face of the connecting shaft cylindrical protrusion is plastically deformed and connected to the unevenness of the end face of the main shaft cylindrical protrusion.

The operation of the invention 2 is the same as that of the invention 1 except that unevenness is provided on the end surface of the connecting shaft cylindrical projection instead of providing the unevenness on the end surface of the main shaft cylindrical projection.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of one side of an embodiment, FIG. 2 is a side view of the spindle of FIG. 1, and FIG. 3 is a front view of FIG. In the figure,
A rolling radial bearing 2 such as a deep groove ball bearing having an outer ring 2a and an inner ring 2b is mounted on a bracket 1 of a rotating electric machine or the like. The annular end surface 4 of the main shaft 3 is provided on a part of the inner ring 2b in the axial direction.
The spindle-shaped cylindrical protrusion 5 protruding from is fitted. A plurality of concavities and convexities 6 are provided on the end surface of the spindle cylindrical protrusion 5, and a screw hole 7 is provided at the end axis of the spindle cylindrical protrusion 5. The connecting shaft cylindrical protrusion 13 protruding from the annular end surface 12 of the connecting shaft 11 is fitted to the remaining axial portion of the inner ring 2b with which the main shaft cylindrical protrusion 5 is fitted. A bolt 14 for inserting the connecting shaft 11 is tightened into the screw hole 7, and the end face of the connecting shaft cylindrical projection 13 is plastically deformed and connected to the unevenness 6. Then, both ends of the inner ring 2b come into contact between the annular end surface 4 and the annular end surface 12 and are tightened.
The inner and outer peripheries of the main shaft cylindrical projection 5 and the connecting shaft cylindrical projection 13 may be chamfered to some extent. The unevenness 6 can be formed by cutting or pressing a parallel groove, a radial pattern, or a seventh knurling,
It is good to quench.

According to such a structure, when the bolt 14 for inserting the connecting shaft 11 is tightened in the screw hole 7 of the main shaft 3, the main shaft cylindrical projecting portion 5 and the connecting shaft cylindrical projecting portion 13 are rolled radial. At the same time as the inner ring 2b of the bearing 2 is fitted, both ends of the inner ring 2b are abutted and tightened between the annular end surface 4 and the annular end surface 12, so that the main shaft 3 and the connecting shaft 1 are connected via the inner ring 2b.
1 is positioned on the same axis. At this time, the end surface of the connecting shaft cylindrical projection 13 is plastically deformed and connected to the unevenness 6 on the end surface of the main shaft cylindrical projection 5. Instead of providing the concavities and convexities on the end face of the main shaft cylindrical protrusion, the concavities and convexities may be provided on the end face of the connecting shaft cylindrical protrusion.

[0010]

According to the rotary shaft connecting device of the present invention, the main shaft and the connecting shaft are accurately positioned on the same shaft center via the inner ring of the bearing, and the unevenness is plastically deformed on the connecting shaft end face or the main shaft end face. Since they are connected, the shaft end size and shape of the connecting shaft of the auxiliary machine connected to the main shaft can be freely changed, and the connecting torque can be increased.

[Brief description of drawings]

FIG. 1 is a side sectional view of an embodiment

FIG. 2 is a side view of the spindle shown in FIG.

3 is a front view of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Bracket 2 Bearing 2a Outer ring 2b Inner ring 3 Spindle 4 Annular end surface 5 Spindle cylindrical protrusion 6 Unevenness 7 Screw hole 11 Connection shaft 12 Annular end surface 13 Connection shaft cylindrical protrusion 14 Bolt

Claims (2)

[Claims] Claim: What is claimed is: 1. A cylindrical spindle projection projecting from an annular end surface of a spindle is fitted in a part of an inner ring of a rolling radial bearing in an axial direction, and a plurality of irregularities are provided on an end surface of the cylindrical spindle projection. A threaded hole is provided in the end axis of the cylindrical projection, and the connecting shaft cylindrical projection that protrudes from the annular end surface of the connecting shaft is fitted to the remaining axial portion of the inner ring where the spindle cylindrical projection fits. Then, the bolt for inserting the connecting shaft is tightened into the screw hole, and the end face of the cylindrical protruding portion of the connecting shaft is plastically deformed and connected to the concavo-convex, thereby connecting. 2. A spindle cylindrical projection projecting from an annular end surface of the spindle is fitted in a part of the inner ring of the rolling radial bearing in the axial direction, and a screw hole is provided in the axial center of the spindle cylindrical projection. The connecting shaft cylindrical projection protruding from the annular end surface of the connecting shaft is fitted to the remaining axial portion of the inner ring with which the main shaft cylindrical projection fits, and the connecting shaft cylindrical projection has a plurality of irregularities on the end surface. Is provided, the bolt for inserting the connecting shaft is tightened into the screw hole, and the end face of the cylindrical protruding portion of the main shaft is plastically deformed to be connected to the concavo-convex portion to connect the rotating shaft connecting device.