JPH09105643A - Encoder mounting structure, encoder attaching / detaching method, and encoder - Google Patents

Abstract

In the conventional encoder mounting method, two screws having different outer diameters must be prepared for fastening and loosening the rotary shaft of the encoder and the motor shaft of the motor, and A screw hole has to be formed in the rotary shaft of the encoder, which makes it difficult to make the structure complicated and inexpensive. An encoder mounting structure, an encoder attaching / detaching method, and an encoder according to the present invention are configured such that a mounting screw (7) provided in a through hole (5) of a rotary shaft (4) is screwed onto a motor shaft (23). The rotation shaft (4) and the motor shaft (23) are attached and detached only by rotating the screw (7).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an encoder mounting structure, an encoder attaching / detaching method, and an encoder, and more particularly to a novel encoder for detaching a rotary shaft of an encoder and a motor shaft of a motor simply by loosening a mounting screw. Regarding improvement.

[0002]

2. Description of the Related Art As an encoder attachment / detachment method of this type which has been conventionally used, for example, a method disclosed in Japanese Patent Publication No. 7-65906 can be cited. That is, "a first tap hole is screwed in the axial direction of a cylindrical coupling portion having a rotary code plate, and an encoder tightening screw having an outer diameter smaller than that of the first tap hole is attached to the first tap hole. Insert the rotary disk from the mounting side to the taper side, punch a second tap hole in the central axis of the taper that engages with the tightening screw, and screw the tightening screw into this to attach the encoder to the shaft. The tightening screw is removed, and the removal screw that engages with the first tap hole of the coupling portion is advanced from the mounting side of the rotating disk of the first tap hole to the taper side. The encoder attachment / detachment method is characterized in that the encoder is removed by still rotating the attachment screw in the traveling direction even after the contact with the shaft end.

[0003]

Since the conventional encoder attachment / detachment method is configured as described above, the following problems exist. That is, a screw hole for removing the encoder must be formed on the rotary shaft of the encoder,
In addition, the encoder tightening screw and the detaching screw for detaching the encoder have to be used, so that the structure is complicated and the attachment and detachment is troublesome.

The present invention has been made to solve the above problems, and in particular, an encoder mounting structure in which the rotary shaft of the encoder and the motor shaft of the motor can be separated from each other by simply loosening the mounting screw. It is an object to provide an encoder attaching / detaching method and an encoder.

[0005]

In the encoder mounting structure according to the present invention, a taper hole of a rotary shaft rotatably provided on a base through a bearing and having a rotary code plate is fitted into a taper portion of a motor shaft of a motor. In the encoder mounting structure adapted to be combined, a through hole provided in the rotary shaft and communicating with the tapered hole, a mounting screw penetrating the through hole and screwed into a screw hole of the motor shaft, and the mounting screw This is a configuration including a flange body provided and located in the tapered hole, and a connection plate provided on the base and connected to the motor.

More specifically, the flange body is composed of a ring which is fitted into a small-diameter portion formed on the rotary shaft and which can be expanded.

In the encoder attaching / detaching method according to the present invention, the taper hole of the rotary shaft rotatably provided on the base through the bearing and having the rotary code plate is fitted into the taper portion of the motor shaft of the motor, and the taper is formed. In an encoder attachment / detachment method in which the rotary shaft and the motor shaft are attachable / detachable through a hole and a taper portion, a flange body that penetrates the rotary shaft and is screwed into the motor shaft and located in the tapered hole is provided. This is a method in which the rotating shaft and the motor shaft are coupled by tightening a mounting screw that is provided, and the flange body separates the rotating shaft from the motor shaft by loosening the mounting screw.

In the encoder according to the present invention, a rotary shaft rotatably provided on a base through a bearing and having a rotary code plate, a through hole and a taper hole formed in the rotary shaft, and the rotary shaft facing the rotary code plate. A light emitting body and a light receiving body, a mounting screw provided through the through hole, and a flange body provided in the mounting screw and located in the tapered hole.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of an encoder mounting structure, an encoder attaching / detaching method, and an encoder according to the present invention will be described in detail below with reference to the drawings. FIG.
Reference numeral 1 in FIG. 1 denotes a base having a pair of bearings 2 and 3, and a cylindrical rotating shaft 4 is rotatably provided on the bearings 2 and 3 while penetrating the base 1. ing. A straight through hole 5 which is not a screw hole and which penetrates the rotary shaft 4 is formed in the rotary shaft 4, and a tapered taper hole 6 is formed in communication with the through hole 5.

The through hole 5 has a threaded portion 7 only on the tip side.
A mounting screw 7 formed of a straight non-threaded portion having a is rotatably provided in the other portion, and a groove-shaped thin portion 8 formed in a thin diameter of the mounting screw 7 has a A flange body 9 made of a well-known expandable ring such as an E ring or a C ring is provided, and the flange body 9 is located in the tapered portion 6.

A printed circuit board 11 is provided on the base 1 via a support column 10, a light receiving body 12 is provided on the back surface of the printed circuit board 11, and a known rotation code provided on the rotary shaft 4 is provided. A plate 13 is located in contact with the light receiving body 12, and a well-known fixed slit plate 14 fixed to the support column 10 side is held in a state of being extremely close to the rotary code plate 13. A light emitter 15 made of an LED is provided on the base 1 side, and light from the light emitter 15 is received by a light receiver 12 via a fixed slit plate 14 and a rotary code plate 13. . In addition, this rotary code plate 1
3 may be of a magnetic type when it is not an optical type.

The screw portion 7a of the mounting screw 7 is rotatably held by a well-known motor 21 and a motor case 22 which are connected to the base 1 through a well-known elastic connecting plate 20, and has a taper portion 23b. Screw hole 23a of the motor shaft 23 having
It is screwed to. Therefore, in the state of FIG. 1, when the mounting screw 7 is tightened, the rotary shaft 4 and the motor shaft 23 are fastened, and when the mounting screw 7 is loosened, the screw portion 7a is disengaged from the screw hole 23a and the flange body 9 is removed. End 6a of taper hole 6
When the mounting screw 7 is loosened, the rotary shaft 4 can be separated from the motor shaft 23 by the flange body 9. That is, the encoder 3 described above
The encoder 30 and the motor 21 can be attached and detached by tightening and loosening only the attachment screw 7 attached to the No. 0.

[0013]

Since the encoder mounting structure, the encoder attaching / detaching method, and the encoder according to the present invention are configured as described above, the following effects can be obtained. That is, the encoder and the motor can be freely connected and disconnected by the mounting screw that is rotatably provided on the rotary shaft of the encoder and has the flange body. As in the conventional case, two screws having different diameters are used. In addition, it is not necessary to provide a screw hole in the rotary shaft of the encoder, and a simple and inexpensive mounting structure can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an encoder mounting structure according to the present invention.

FIG. 2 is an enlarged configuration diagram showing a main part of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2,3 Bearing 4 Rotating shaft 5 Through hole 6 Tapered hole 7 Mounting screw 9 Flange body 8 Small diameter part 12 Light emitting body 13 Rotation code plate 14 Light receiving body 20 Connection plate 21 Motor 23 Motor shaft 23a Screw hole 23b Tapered portion

Claims (4)

[Claims] 1. A taper hole for a rotary shaft (4), which is rotatably provided on a base (1) via bearings (2, 3) and has a rotary code plate (13).
In the encoder mounting structure in which (6) is fitted to the taper portion (23b) of the motor shaft (23) of the motor (21), the shaft (4) communicates with the taper hole (6) provided in the rotation shaft (4). Through hole
(5), a mounting screw (7) penetrating the through hole (5) and screwed into a screw hole (23a) of the motor shaft (23), and the mounting screw (7)
A flange body (9) provided in the tapered hole (6)
An encoder mounting structure comprising: a connection plate (20) provided on the base (1) and connected to the motor (21). 2. The encoder according to claim 1, wherein the flange body (9) is a ring that is fitted into a small diameter portion (8) formed on the rotating shaft (4) and is expandable. Mounting structure. 3. A taper hole for a rotary shaft (4), which is rotatably provided on a base (1) via bearings (2, 3) and has a rotary code plate (13).
(6) is fitted into the taper portion (23b) of the motor shaft (23) of the motor (21), and the rotary shaft (4) and the motor via the taper hole (6) and the taper portion (23). In the encoder attachment / detachment method in which the shaft (23) can be attached and detached, the rotary shaft (4) is threadedly engaged with the motor shaft (23) and the taper hole is formed.
Mounting screw (7) with flange body (9) located inside (6)
, The rotary shaft (4) and the motor shaft (23) are joined by tightening, and the flange body (9) causes the rotary shaft (4) to move the motor shaft (23) by loosening the mounting screw (7). An encoder attachment / detachment method characterized by detaching from the encoder. 4. A rotary shaft (4) rotatably provided on a base (1) via bearings (2, 3) and having a rotary code plate (13), and formed on the rotary shaft (4). A through hole (5) and a tapered hole (6), a light emitting body (12) and a light receiving body (14) provided to face the rotary code plate (13), and the through hole (5). The mounting screw (7) provided and the taper hole provided on the mounting screw (7)
An encoder comprising a flange body located at (6).