JPH0615518Y2 - Geared motor with position detector - Google Patents

Description

TECHNICAL FIELD The present invention relates to a geared motor with a position detector that detects a stop position of an output shaft of a geared motor.

Conventional technology As a geared motor with position detector
The one described in Japanese Patent No. 561 is known. This is the third
As shown in FIG. 4, the geared motor 1, the position detector 2 for detecting the stop position of the output shaft 1a of the geared motor 1, and the position detector 2 are housed inside the geared motor 1 so as to be integrated with the geared motor 1. It is composed of a fixed casing 3.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In such a conventional geared motor with position detector, in order to fix the casing 3 to the gear substrate 1b of the geared motor 1, the switch substrate 2a of the position detector 2 needs to be fixed. Since the screw 4 extending therethrough is used, there are the following problems.

(1) The diameter of the casing 3 must be increased by the diameter of the screws 4 ... That is, the diameter of the geared motor with the position detector cannot be reduced.

(2) As shown in FIG. 4, screws 4 ... 4 or screw holes 5 ...
Due to the presence of the switch 5, the arrangement of the conductive pattern 2b formed on the switch substrate 2a of the position detector 2 is restricted, and the turning radius of the brush 2c that is in sliding contact with the conductive pattern 2b is also restricted.

The present invention has been made for the purpose of solving the above conventional problems.

Means for Solving the Problems Having a geared motor, a position detector that detects a stop position of an output shaft of the geared motor, and a casing that houses the position detector therein and is integrally fixed to the geared motor. In the geared motor with position detector, the casing is formed in a cylindrical shape, and a locking claw of a desired size is provided on the inner peripheral surface of the opening end side edge portion so as to project, and the outer periphery of the gear substrate of the geared motor. A locking claw engagement groove having a size corresponding to the size of the locking claw with which the locking claw engages when the casing is fitted to the outer peripheral surface is formed on the surface, The opening end side edge portion is fitted to the outer periphery of the gear board, and the locking claw is engaged with the locking claw engaging groove to fix the casing and the gear board in a non-rotatable manner. Set the tip of the locking claw to the diameter of the gear substrate. Crimped (bent) inwardly of direction was fixed to immovable casing and Gya substrate to each other in the axial direction.

Action The geared motor and the casing can be fixed to each other without using a screw extending through the switch substrate that constitutes the position detector housed inside the casing.

Embodiment Next, the present invention will be described with reference to FIGS. 11 is a geared motor, 12 is an output shaft 11 of the geared motor 11.
A position detector for detecting the stop position of a and a casing 13 for housing the position detector 12 therein. The geared motor 11 includes an output shaft 11a and an output shaft 11a.
A gear substrate 11c that rotatably supports the shaft via a bearing 11b, a reduction gear 11d provided on the gear substrate 11c, and an output shaft 11 via the reduction gear 11d.
and a motor body 11e for rotating a. Further, the position detector 12 includes conductive patterns 12b ... 12b.
And a brush fixing plate 12d provided with brushes 12c ... 12c slidably contacting the conductive patterns 12b ... 12b. The switch board 12a is connected to the output shaft 11a via the board holder 12e.
The brush fixing plate 12d is fixed to the underside of the gear substrate 11c. The casing 13 is formed into a cylindrical shape by drawing an iron-based metal plate or cutting an iron-based metal rod (pillar), and a locking claw 13a is formed on the opening-side edge portion thereof. The locking claw 13a is formed on the geared motor 11
The groove 11f provided in the gear substrate 11c is fitted, and the locking claw 13a is caulked inward, whereby the gear substrate 1
1c is fixed to the casing 13, whereby the casing 13 for accommodating the position detector 12 inside the geared motor 11 is assembled and fixed. In this way, the relative movement of the gear substrate 11c and the casing 13 in the rotation direction is restricted.

Although the switch substrate 12a of the position detector 12 is fixed to the output shaft 11a and the brush fixing plate 12d is fixed to the gear substrate 11c of the geared motor 11 in the embodiment shown in the drawings, the brush fixing plate is opposite to this. 12d is the output shaft 11a
The switch substrate 12a may be fixed to the gear substrate 11b side, and the switch substrate 12a may be fixed to the gear substrate 11b side. Alternatively, the entire circumference of the opening-side edge portion of the casing 13 may be caulked and fixed to the gear substrate 11c.

Effect of the Invention The guarded motor with position detector of the present invention has the following effects.

(1) Since the locking claws are bent in the radial direction of the gear board and crimped, caulking work is easier and the workability of assembling the geared motor to the casing is easier than when using screws or the like. In addition to being improved, relative rotation of the casing and the geared motor and relative movement in the axial direction can be reliably prevented.

(2) Since a screw and a screw hole are not required, the conductive pattern formed on the switch substrate of the position detector can be afforded, and a complicated conductive pattern can be formed.

(3) Since the screw is not required, the diameter of the casing can be reduced, which is effective in reducing the diameter of the geared motor with the position detector.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a geared motor with a position detector of the present invention, FIG. 2 is a sectional view showing a locked state of a gear substrate and a casing, and FIG. 3 is a vertical sectional view showing a conventional example. FIG. 4 is a sectional view taken along line IV-IV in FIG. Reference numeral 11 ... Geared motor, 11a ... Output shaft, 12 ... Position detector, 13 ... Casing, 13a ... Locking claw for caulking and coupling.

Claims (1)

[Scope of utility model registration request] 1. A position detector having a geared motor, a position detector for detecting a stop position of an output shaft of the geared motor, and a casing which houses the position detector therein and integrally fixed to the guard motor. In the attached geared motor, the casing is formed in a tubular shape, and a locking claw of a desired size is provided on the inner peripheral surface of the opening end side edge portion so as to project, and on the outer peripheral surface of the gear substrate of the geared motor. Forming an engaging claw engaging groove of a size corresponding to the size of the engaging claw with which the engaging claw engages when the casing is fitted on the outer peripheral surface, and the opening end side of the casing The edge portion is fitted to the outer periphery of the gear substrate, and the locking claw is engaged with the locking claw engaging groove,
The casing and the gear base plate are fixed to each other so that they cannot rotate, and the tip of the locking claw is bent inward in the radial direction of the gear base plate to be caulked so that the casing and the gear base plate are fixed to each other so that they cannot move in the axial direction. A geared motor with a position detector characterized by.