JP2576087Y2 - Encoder structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an encoder structure, and in particular, a mounting spring for connecting a motor and an encoder is accommodated within the outer diameter of the encoder, the axial length at the time of connection is kept short, and the outer diameter is reduced. It relates to a new improvement to suppress enlargement.

[0002]

2. Description of the Related Art As this kind of encoder structure conventionally used, the structure shown in FIGS. 3 and 4 is generally adopted. That is, in the case of FIG. 3, the motor 1 and the encoder 2 are connected via the U-shaped mounting spring 3, and the mounting spring 3 is U-shaped and disposed outside the outer diameter of the encoder 2. In the case of FIG. 4, the mounting spring 3 is formed in a U-shaped longitudinal shape, and is connected to the outer periphery 2 a of the encoder 2 via the mounting screw 4.

[0003]

Problems to be Solved by the Invention Since the conventional encoder structure is configured as described above, the following problems exist. That is, in the case of FIG. 3, since each of the mounting springs is located at a position equal to or larger than the outer diameter of the encoder, the outer diameter of the motor must be increased, and it is impossible to achieve a reduction in size. In the case of FIG. 4, since the mounting spring has a long shape and the mounting screw is mounted on the outer periphery of the encoder, the overall shape becomes longer and the diameter is increased by the amount of the protrusion of the mounting screw.

The present invention has been made to solve the above-described problems. In particular, a mounting spring for connecting a motor and an encoder is accommodated within the outer diameter of the encoder to shorten the axial length at the time of connection. It is an object of the present invention to provide an encoder structure that suppresses an increase in outer diameter.

[0005]

An encoder structure according to the present invention includes a hollow shaft rotatably provided in a casing,
An encoder comprising: a rotation code plate provided on the hollow shaft; a light emitting unit and a light receiving unit provided on the casing and opposed to each other with the rotation code plate interposed therebetween; and a motor shaft connected to the hollow shaft. In the structure, an end face portion of the casing from which the hollow shaft projects, and a mounting spring that is mounted to the end face portion via a mounting screw and the hollow shaft penetrates,
A plurality of mounting holes formed in the mounting spring, and a plurality of clearance grooves formed in the peripheral surface of the casing in the axial direction and corresponding to the mounting holes, wherein the mounting screw is provided in the axial direction of the casing. The outer edge of the mounting spring is located within the outer diameter of the casing.

More specifically, the mounting spring has a U-shaped portion at the center.

[0007]

In the encoder structure according to the present invention, since the mounting spring can be mounted on the end face of the casing of the encoder by the mounting screw screwed in the axial direction, the mounting screw projects outward from the peripheral surface of the casing. This can prevent an increase in diameter. Further, by inserting a jig such as a driver through a clearance groove along the axial direction formed on the peripheral surface of the casing, the mounting hole of the mounting spring can be connected to the motor via a screw. Therefore, it is possible to prevent an increase in the length and diameter of the encoder structure.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the encoder structure according to the present invention will be described in detail with reference to the drawings. The same or equivalent parts as those in the conventional example will be described with the same reference numerals.
In FIG. 1 and FIG. 2, what is indicated by reference numeral 2 is a casing of the encoder.
, A hollow shaft 5 rotatably provided in the casing 2 is rotatably provided.

In the casing 2, a light-emitting portion 5A and a light-receiving portion 5B are opposed to each other via a rotary code plate 5a provided integrally with the hollow shaft 5, and the light-emitting portion 5A and the light-receiving portion 5B are provided. Is configured to detect the rotation of the rotation code plate 5a.

The end face 2a has a guide hole 1 at the center thereof.
Mounting spring 3 having 0 and U-shaped portion 11 protruding in a U-shape
The mounting spring 3 is formed by a pair of mounting screws 4 screwed along the axial direction of the casing 2 so that the end surface 2a
Mounted on

A pair of clearance grooves 12 are formed in the peripheral surface of the casing 2 along the axial direction.
Reference numeral 2 is provided corresponding to a pair of mounting holes 13 formed in the mounting spring 3.

Accordingly, the hollow shaft 5 penetrates and projects through the guide hole 10 of the mounting spring 3, and a rotating body composed of the rotating shaft of the motor 1 is connected to the hollow shaft 5, and each of the mounting holes 13
The mounting spring 3 can be fixed to the end 1 a of the motor 1 by rotating the screw 14 by a jig 15 such as a screwdriver, which is inserted through the clearance groove 12. The outer edge 3a of the mounting spring 3 is
Of the outer diameter 2b.

[0013]

The encoder structure according to the present invention is configured as described above. Therefore, when connecting the encoder and the motor, the outer edge of the mounting spring can be made smaller than the outer diameter of the casing and the shaft can be connected to the motor. The length between the encoder and the motor in the direction can be reduced. The overall shape can be a configuration in which only an encoder and a motor are combined.

[Brief description of the drawings]

FIG. 1 is a structural view showing a structure of an encoder according to the present invention with a partial cutout.

FIG. 2 is a front view showing the mounting spring of FIG. 1;

FIG. 3 is a plan view showing a first conventional example of the related art.

FIG. 4 is a plan view showing a second conventional example of the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 2 Casing 2a End surface part 2b Outer diameter 3 Mounting spring 3a Outer edge 4 Mounting screw 5 Hollow shaft 5a Rotating code plate 5A Light emitting part 5B Light receiving part 11 U-shaped part 12 Escape groove 13 Mounting hole

Claims (2)

(57) [Scope of request for utility model registration] A hollow shaft (5) rotatably provided on a casing (2), and a rotation code plate (5) provided on the hollow shaft (5).
a) and the rotation code plate (5
a) a light-emitting unit (5A) and a light-receiving unit (5B), which are arranged to face each other via (a), and wherein the hollow shaft (5) has a motor shaft connected to the motor shaft. An end face portion (2a) of the casing (2) protruding, a mounting spring (3) mounted on the end face portion (2a) via a mounting screw (4), and through which the hollow shaft (5) passes; A plurality of mounting holes (13) formed in the spring (3); and a plurality of clearance grooves (12) formed in the circumferential surface of the casing (2) in the axial direction and corresponding to the mounting holes (13).
The mounting screw (4) is provided in the axial direction of the casing (2), and the outer edge (3a) of the mounting spring (3) is located within the outer diameter (2b) of the casing (2). An encoder structure characterized by having a configuration. 2. The mounting spring (3) has a U-shaped part (11) in the center.
The encoder structure according to claim 1, comprising: