JPS6015414Y2 - Dry type submersible electric motor - Google Patents

Description

[Detailed Description of the Invention] The present invention aims to provide a dry submersible electric motor that is small, lightweight, and inexpensive.

Conventionally, in this type of dry type submersible electric motor, Fig. 1 and Fig. 2
As shown in the figure, the outer periphery of a bracket 5 to which a control device 3 and a ball bearing 4 are attached is sandwiched between a frame 1 and a cover 2, and a bracket 5 is formed between a frame 1, a cover 2, and a bracket 6. triangular or square i6a, 6b
O-rings or backings 7a, 7b are interposed therebetween.

As is clear from the above structure, the conventional method requires two backings, and the bracket has a large diameter, which is the same as the diameter of the frame and the cover, resulting in high cost.

The present invention solves the above-mentioned conventional drawbacks with a simple structure, and one embodiment of the present invention will be described below with reference to FIGS. 3 and 4.

As shown in the figure, a spigot 12 is provided on the inner circumference of the frame 11.
A spigot 14 is also formed on the inner periphery of the cover 13 where the outer periphery joins the frame 11, while a spigot 14 is formed on the outer periphery of the bracket 17 to which the control equipment 15 and ball bearing 16 are attached. Notification portions 17b and 17c that protrude in the axial direction are formed on both the upper and lower surfaces of 17a, and these protruding portions 1
7b and 17c are fitted into the spigot 14.12.

In addition, the end face of the inner peripheral part of the frame 11 is cut out in a triangular cross-section, so that when the protrusions 17b and 17c are fitted with a spigot, the end face of the outer diameter part of the bracket 17, the axial end face of the cover 13, and the frame are cut out. A triangular groove 18 is formed between the axial end face and the axial end face.

An O-ring or backing 19 is interposed in this triangular groove 1B.

Note that idling of the bracket 17 due to the load from the ball bearing 16 is prevented by compressing the inner diameter side by compressing the backing 19 after it is assembled.

Further, in the embodiment, the end face of the inner circumferential portion of the frame 11 is cut out in a triangular shape, but the end face of the inner circumferential portion of the cover 13 may be similarly cut out.

As is clear from the above configuration, according to the present invention, only one O-ring or backing is required for sealing the joint between the bracket, frame, and cover, and the outer diameter of the bracket is reduced, thereby reducing costs.

In addition, the bracket has a protrusion that protrudes in the axial direction on the outer diameter part, and it fits into the pilot provided on the frame and cover, so the seal is reliable and the mounting position of the bracket is accurate, which has practical value. It is a big thing.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a conventional dry type submersible electric motor, FIG. 2 is an enlarged sectional view of the same essential parts, FIG. 3 is a sectional view of a dry type submersible electric motor according to an embodiment of the present invention, and FIG. It is an enlarged sectional view of the main part. 11...Frame, 12...Frame spigot, 13...-cover, 14...
... Cover spigot, 15 ... Control equipment,
16...Curved ball bearing, 17...Bracket, 17
a...Bracket outer diameter part, 17b, 17e.
...Protrusion, 18...Triangle g, 19...
····backing.

Claims (1)

[Scope of utility model registration request] Protrusions projecting in the axial direction are provided on both upper and lower surfaces of the outer diameter part of the bracket to which the ball bearing and the control equipment are attached, and one of the protrusions is fitted into a spigot provided on the inner circumference of the frame. The other of the protrusions is fitted into a spigot provided on the inner periphery of the cover where the frame and the outer periphery are joined, and the end surface of the inner periphery of the frame or cover is cut out to have a triangular cross-section. A dry submersible electric motor in which a triangular groove is formed between an axial end face, an outer diameter end face of a bracket, and an axial end face of a frame, and a backing is interposed in this triangular groove.