JPH0567163U - Electric motor - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a structure in which water does not enter the inside of a bearing or an electric motor regardless of whether the rotating shaft is oriented upward or laterally. [Structure] A cylindrical barrier 5 which doubles as a receiving portion of a bearing outer ring 21 is attached to an opening 4 of a bearing portion 3 of a bracket 1, and a rotary shaft 6 is provided with a cup-shaped waterproof cover 7 for covering the same. ing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drip-proof electric motor.

[0002]

[Prior Art]

 Conventionally, in a drip-proof electric motor, as shown in FIG. 2, a drain disk 14 is attached to a rotating shaft 13 on the bearing 12 side of a steel plate bracket 11, and a drain disk 14 is provided outside the bearing 12. The waterproof cover 15 is attached to cover the above. However, according to this structure, there is a gap 16 between the drain disc 14 and the bearing portion 12 and the waterproof cover 15. Therefore, when water is applied with the rotating shaft 13 facing upward, the bearing 16 and the bearing are passed through the gap 16. It has a drawback that water gets inside the electric motor. To improve this, as shown in FIG. 3, there is a structure in which a waterproof disc 17 is provided on the rotating shaft 13 on the bearing part 12 side so as to come into contact with the bearing part 12. Since there is a gap 18 between the bearing 17 and the bearing portion 12, when the rotary shaft 13 is turned sideways, there is a drawback that water enters the inside of the bearing and the electric motor through the gap 18.

[0003]

[Problems to be solved by the device]

 The present invention has been made in view of the drawbacks of the above-mentioned conventional electric motor, and provides a structure in which water does not enter the bearing or the electric motor even when the rotating shaft is oriented upward or sideways. Is.

[0004]

[Means for Solving the Problems]

 In order to solve the above problems, the electric motor of the present invention has the following structure. That is, a cylindrical barrier that doubles as a bearing for the outer ring of the bearing is provided in the opening of the bearing of the bracket, and a cup-shaped waterproof cover that covers the barrier is fixed to the rotating shaft, and the contact type bearing is used as the bearing. It uses a sealed ball bearing.

[0005]

[Action]

 According to the above configuration, a cylindrical barrier that doubles as a bearing for the bearing outer ring is provided at the opening of the bearing portion of the bracket, and a cup-shaped waterproof cover is provided on the rotating shaft to cover the barrier. A gap is formed between the motor and the waterproof cover.However, when the motor's rotating shaft is mounted upward, the barrier is covered by the cup-shaped waterproof cover even if water is poured from above, so bearings and If water does not enter the inside of the motor, and if the motor's rotating shaft is installed sideways, if water is applied from above, water will flow out through the gap between the barrier and the waterproof cover. No water gets inside the electric motor. Also, even if water enters the ball bearing, it is a contact type seal ball bearing, so it is difficult for water to enter.

[0006]

【Example】

 An embodiment of the present invention will be described with reference to the accompanying drawings. In FIG. 1, 1 is a bracket 1 made of steel plate, and the bracket 1 is provided with a bearing portion 3 having an opening 4 for holding a bearing 2. A cylindrical barrier 5 is attached to the opening 4. The barrier 5 is made of an elastic material such as synthetic rubber, and has an engaging portion 51 that also serves as a receiving portion that abuts the bearing outer ring 21 at one end. Further, a cup-shaped waterproof cover 7 formed of an elastic material such as synthetic rubber and having a cylindrical portion 71 for covering the barrier 5 is attached to the rotary shaft 6 which is pivotally supported by the bearing 2. With the above configuration, when the rotary shaft 6 of the electric motor is mounted upward, when water is applied from above, the cylindrical portion 71 of the cup-shaped waterproof cover 7 faces downward, and the cylindrical portion 52 of the barrier 5 is located inside this. Since it is positioned and covered, water does not get inside, and the bearing 2 and the inside of the motor are completely waterproof. In addition, when the rotating shaft 6 of the electric motor is installed sideways, if water is sprayed from above, the water will flow out through the gap between the barrier 5 and the waterproof cover 7, and the bearing 2 and the electric motor There is no such thing as water entering inside. Even if water should enter the bearing 2, the bearing 2 uses a contact type seal ball bearing, and the engaging portion 51 of the barrier 5, which also functions as the receiving portion, comes into contact with the bearing outer ring 21. As a result, the sealing effect prevents water from entering inside.

[0007]

[Effect of the device]

 As described above, according to the electric motor of the present invention, the opening of the bearing portion of the bracket is provided with the cylindrical barrier which also serves as the receiving portion of the bearing outer ring, and the rotating shaft is provided with the cup-shaped waterproof cover for covering the same. When the motor is installed with the rotary shaft facing upwards, the waterproof cover covers the barrier even if water is splashed from above, so there is no water inside and the rotary shaft of the motor does not Even if it is installed sideways or sprinkled with water from above, water will not flow out through the gap between the barrier and the waterproof cover, and will not enter into the bearing or the motor. This makes it possible to create low cost, highly reliable and long life motors.

[Brief description of drawings]

FIG. 1 is a cutaway side view of an essential part of an electric motor according to an embodiment of the present invention.

FIG. 2 is a cutaway side view of a main part of a conventional electric motor.

FIG. 3 is a cutaway side view of a main part of another conventional electric motor.

[Explanation of symbols]

 1 Bracket 2 Bearing 3 Bearing part 4 Opening 5 Barrier 6 Rotating shaft 7 Waterproof cover

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Yuuji Kawai, 1116 Suenaga, Takatsu-ku, Kawasaki-shi, Fujitsu General Co., Ltd. (72) Koji Mori, 1116 Suenaga, Takatsu-ku, Kawasaki-shi, Fujitsu General (72) Inventor: Shigeru Mori 1116 Suenaga, Takatsu-ku, Kawasaki City Inside Fujitsu General Limited

Claims (1)

[Scope of utility model registration request] 1. A bracket having a cylindrical shape, which also serves as a receiving portion of an outer ring of a bearing, is provided in an opening of a bearing portion of a bracket, and a cup-shaped waterproof cover for covering the barrier is fixed to a rotating shaft, and the bearing serves as the bearing. An electric motor characterized by using a mold-sealed ball bearing.