JPH06351194A - Motor with built-in sensor - Google Patents

Abstract

(57) [Abstract] [Purpose] For motors with a built-in sensor, mounting screws for the sensor cover are unnecessary and mounting is easy.
Also, a structure that can be mounted in a small space is provided. [Structure] By providing a claw 32 inside the opening end of the resin sensor cover 31 and a groove 42 on the sensor cover side outer circumference of the bracket B41, and fitting the claw 32 of the sensor cover 31 into the groove 42 of the bracket B41. The sensor cover 31 can be easily attached and the attaching screw can be eliminated. The same effect can be obtained when the claws and the grooves are opposite. In addition, by mounting an O-ring between the sensor cover 31 and the bracket 41, the internal airtightness can be maintained, which is extremely advantageous in practical use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor structure.

[0002]

2. Description of the Related Art In recent years, motors have been required to have a reduced number of parts and a simplified manufacturing method in order to reduce costs and man-hours.

A conventional mounting structure for a sensor cover of a motor will be described below. FIG. 4 shows an overall view of the motor. 11 is a rotor, 12 is a bracket A, 13 is a stator, 14 is a bracket B, and 15 is a sensor cover. The sensor cover 15 is attached to the bracket B14 and has a sensor for detecting the speed and the position therein.

FIG. 5 shows a conventional method of attaching a sensor cover of a motor. Conventionally, the sensor cover 21 is fastened with a screw 24 in order to attach it to the bracket B23. Further, a sealing material such as a gasket or a liquid packing is used between the sensor cover 21 and the bracket B23 to maintain the hermeticity.

[0005]

However, when the conventional method is used for mounting the sensor cover of the motor, there are the following problems. That is, the screw cannot be used if there is no space for fastening the screw with the downsizing of the motor. Further, when fastening with screws, tapping is required on the side of the bracket B and, of course, screws are also required, which increases the cost accordingly.

The present invention solves such conventional problems,
An object of the present invention is to provide a motor sensor cover mounting device that facilitates mounting of a motor sensor cover and enables mounting of the sensor cover in a space-saving manner.

[0007]

In order to achieve this object, a motor with a built-in sensor according to the present invention has a resin sensor cover having a U-groove-shaped notch for penetrating a sensor lead wire. A convex portion or a concave portion provided on a part of the inner diameter of the tip portion on the side of the portion is fitted and attached to a concave portion or a convex portion provided on the outer periphery of the bracket B. Further, in order to prevent rotation in the circumferential direction, a convex portion or a concave portion is fitted to the inner diameter of the tip end portion on the opening side of the sensor cover, and a portion of the bracket B opposed thereto is fitted and attached to the concave portion or the convex portion on the axial side. .
An O-ring is attached between the sensor cover and the bracket B.

[0008]

With this structure, the screw for attaching the sensor cover is not required, the sensor cover can be easily attached, and the sensor cover can be attached in a space-saving manner. Further, the O-ring can keep the internal airtightness.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG. 1 shows a sensor cover, and FIG.
The front view and the side sectional view of the bracket B are shown in FIG.
In FIG. 1, reference numeral 31 is a resin sensor cover having a U-groove-shaped notch for penetrating the sensor lead wire,
Inside the opening-side tip of the sensor cover 31, a mounting claw (projection) 32 and a rotation prevention claw (projection) 33 are provided.
Have.

In FIG. 2, the bracket B41 has a groove (recess) 42 for mounting the sensor cover and a groove (recess) 43 for preventing rotation of the sensor cover on the outer periphery of the end portion on the sensor cover side.

FIG. 3 shows the assembled state. In FIG. 3, the sensor cover 31 can be attached to the bracket B41 by fitting the attachment claw 32 of the sensor cover 31 into the attachment groove 42 of the bracket B41 while elastically deforming the sensor cover 31.

The rotation of the sensor cover 31 can be prevented by fitting the claw 33 for preventing rotation of the sensor cover 31 into the groove 43 for preventing rotation of the bracket B41. Moreover, by mounting the O-ring 51 between the sensor cover 31 and the bracket 41, the internal airtightness can be maintained.

Second Embodiment Contrary to the first embodiment, the same effect can be obtained by providing a groove (concave portion) in the sensor cover portion and a claw (convex portion) in the bracket portion.

[0015]

As described above, the motor with a built-in sensor of the present invention does not require a screw for attaching the sensor cover, and the sensor cover can be easily attached by simply elastically deforming it, and the sensor can save space. A cover can be attached. Further, by mounting the O-ring, the internal airtightness can be maintained, and the sensor cover mounting device of the motor can be practically effective.

[Brief description of drawings]

1A is a front view of a sensor cover according to an embodiment of the present invention, and FIG. 1B is a side sectional view of the same.

FIG. 2A is a front view of a bracket B according to an embodiment of the present invention, and FIG. 2B is a side sectional view of the same.

FIG. 3 is a sectional view of the attachment when an O-ring is used in an embodiment of the present invention.

FIG. 4 is a block diagram of a conventional motor

FIG. 5 (a) is an explanatory view of a conventional sensor cover mounting state of the motor, and FIG. 5 (b) is an explanatory view of a state inside the sensor cover.

[Explanation of symbols]

 11 Rotor 12 Bracket A 13 Stator 14, 23, 41 Bracket B 15, 21, 31 Sensor cover 22 Sensor 24 Screw 32 Claw for mounting (convex portion) 33 Claw for preventing rotation (convex portion) 42 For mounting Groove (recess) 43 Rotation preventing groove (recess) 51 O-ring

Claims (3)

[Claims] 1. A stator, a rotor and a bracket are provided,
In a motor with a built-in sensor having a sensor provided on one side surface of the bracket and having a U-shaped cutout portion for penetrating the lead wire of the sensor, a motor with a built-in sensor is provided on the opening side of the resin sensor cover. A convex portion or a concave portion is provided in a part of the inner diameter of the tip portion, a concave portion or a convex portion is provided on the outer circumference of the bracket, and the concave portion and the convex portion or the convex portion and the concave portion of the sensor cover and the bracket are fitted and mounted. Motor with built-in sensor. 2. The sensor according to claim 1, wherein a convex portion or a concave portion is provided on an inner diameter of an opening-side tip portion of the sensor cover, and a concave portion or a convex portion is provided on an outer peripheral side of the bracket facing the sensor cover in an axial direction. Built-in motor. 3. The motor with a built-in sensor according to claim 1, wherein an O-ring is mounted between the sensor cover and the bracket.