JPH07220822A - Rotary sensor - Google Patents

Abstract

PURPOSE:To strengthen force of bonding a rotational speed detecting sensor part to a connector part by setting the dimension of a constrictive part to a maximum limit in a sensor part positioning protrusive part and a connector resin notched part. CONSTITUTION:A cavity part 7 with which a rotary unit holding nut 2 does not come into contact, is effectively utilized, to provide a protrusion part 14 in a rotational speed detecting sensor part 6. Then, the dimension of mounting a sensor part positioning protrusive part 9', fitted to a cover 5, can be taken to a maximum limit. Here is formed the protrusive part 9' so that a shape of the sensor part 6 is protruded to the cavity part 7 between the nut 2 and the cover 5. When the mounting dimension is enlarged, dimension L of a connector part molding resin charging notched part 10' can be largely taken, and also the dimension of a bonding force strengthening protrusive part 11' can be largely taken. Thus by reinforcing bonding force of the sensor part 6 to a connector part 13, the bonding force can be strengthened even without forming a rotary sensor in a large size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a rotation sensor in which the mounting strength of a sensor portion and a connector portion is improved.

[0002]

2. Description of the Related Art FIG. 2 is a structural diagram of a conventional rotation sensor. In FIG. 2, a rotating body (for example, a bearing) 1 is fixed by a rotating body holding nut 2, and a rotating measurement object detection plate 3 is provided.
Are mounted in the circumferential direction. Rotating object detection plate 3
For example, a magnetic detection plate, a gear, or the like having a cutout portion continuous in the circumferential direction is used. With the above, the rotating unit is configured and rotates as shown by an arrow N in the figure.

On the other hand, the fixed part covers the rotating part and is a concentric rotation measuring device for positioning the rotating part concentrically. (2) Covered by a body guide 4, a cover 5 fixed to the body holds the rotating body. It covers the nut 2.

For example, an electromagnetic coil (pickup sensor)
A sensor 6 for rotational speed detection, which is formed by resin molding a sensor composed of a hole element and a hall element, is fixed to the cavity 7 together with the cover 5 so as not to come into contact with the rotating part in the vicinity of the rotating object detection plate 3 to be measured. Has been done.

The rotational speed detecting sensor portion 6 is sealed with a cover 8 with a cover 5, and a sensor portion positioning projection 9 is fitted in a hole portion of the cover 5. Further, the notch 10 for filling the resin for molding the connector portion and the protrusion 11 for enhancing the adhesive force are molded as shown in the figure, and the entire rotational speed detecting sensor is primarily molded and fixed to the cover 5.

On the other hand, the connector portion 13 having the external circuit connecting contact 12 is secondarily formed so as to be fixed to the rotational speed detecting sensor 6 which is firstly formed. With this configuration, the signal of the sensor unit 6 for detecting the rotational speed can be taken out from the external circuit connecting contact 12 of the connector unit 13.

[0007]

2. Description of the Related Art The diameter of the connector molding resin filling notch 10 for fitting the rotational speed detecting sensor 6 to the cover 5 and fixing it to the connector 13 or the crossover dimension l is There is a problem that the size of the speed detecting sensor part 6 is limited and cannot be made large, the adhesion with the connector part 6 cannot be strengthened, and the adhesive part of the connector part 6 is missing. It was

[0008]

2. Description of the Related Art A cavity 7 formed between a nut 2 for holding a rotating body and a cover 5 is used to provide a protrusion on a part of a sensor 6 for detecting a rotation speed so as to fill a resin for molding a connector. By maximizing the size of the notch portion 10 and (3) strengthening the adhesive force between the rotation speed detecting sensor portion 6 and the connector portion 6, the problems of the prior art were solved.

[0009]

1 is a structural diagram of a rotation sensor of the present invention.
The same parts as those in the conventional structure shown in FIG. 1 are designated by the same reference numerals. The description of the same parts as those of the conventional art will be omitted, and only the parts relating to the present invention will be described. By effectively utilizing the hollow portion 7 that the rotating body holding nut 2 does not hit, the rotation speed detecting sensor portion 6
Protrusions 14 are provided on. As a result, the mounting dimension of the sensor-positioning projection 9'of the present invention fitted to the cover 5 can be maximized.

By making the above dimensions large, it is possible to make the dimension L of the connector portion molding resin filling notch 10 'of the present invention large, and therefore the protrusion 1 for enhancing the adhesive strength of the present invention.
The size of 1'can also be made large.

[0011]

As a result, the adhesive strength between the rotation speed detecting sensor portion 6 and the connector portion 13 can be enhanced without increasing the size of the rotation sensor. Therefore, it is a general-purpose rotation sensor and can provide a strong and robust product, which is extremely useful in industry.

[Brief description of drawings]

FIG. 1 is a structural sectional view of a rotation sensor of the present invention.

FIG. 2 is a structural sectional view of a conventional rotation sensor.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Rotating body (for example, bearing) 2 Rotating body holding nut (4) 3 Rotating measurement object detection plate 4 Rotating measurement object guide 5 Cover 6 Rotation speed detection sensor section 7 Cavity section 8 Packing 9 Sensor section positioning protrusion Part 9 ′ Sensor part positioning protrusion of the present invention 10 Connector part molding resin filling notch 10 ′ Connector molding resin filling notch 11 of the present invention Adhesive strength enhancing protrusion 11 ′ Adhesive strength enhancing protrusion of the present invention Part 12 External circuit connection contact 13 Connector part 14 Projection part N Rotation direction instruction l Conventional connector part molding resin filling notch size L Conventional connector part molding resin filling notch size of the present invention

Claims (1)

[Claims] 1. A resin portion is integrally molded with a rotational speed detecting sensor portion and a connector portion having an external circuit connecting contact portion which is drawn out above the sensor portion, and the resin mold is formed. A rotation sensor formed by accommodating and fixing a body in a cover so that the connector portion is exposed and the sensor portion and a cutout portion that is continuous in the circumferential direction of the measured object to be rotated are covered. In the above, the sensor part for detecting the rotational speed has a protrusion formed so as to protrude into a cavity between the nut for holding the rotating body and the cover, and the sensor part is fitted with the cover. Detecting the rotational speed by maximizing the dimensions of the constriction of the positioning protrusion and the connector molding resin filling notch that fits with the connector to the protrusion provided on the sensor Sensor part and the connector A rotation sensor characterized in that it is configured so that the adhesive force with the connector is strengthened.