JPS6172894A - Submergible pump - Google Patents

Abstract

PURPOSE:To reduce noise and simplify the structure by providing elastic bodies on the front and rear faces of a motor respectively so as to fix the motor not to directly contact with a housing, and at the same time providing shaft seal function and the sealing and water-proof function for the interior of housing to one of the elastic bodies. CONSTITUTION:On the front face of a motor 1 being the output shaft side an elastic body 3 is provided, on the other hand, on the rear face of the motor 1 an elastic body 7 having an concave part in its center is provided, and a bearing part 8 of the motor 1 is fitted in this concave part. Thus, since the motor 1 contacts only with the elastic bodies 3 and 7, vibration is scarcely transmitted to a housing 2, and accordingly noise can be greatly reduced. Further, since the elastic body 3 is tightened by a pressure screw 10, the outer periphery of the elastic body 3 is pressed to be contacted with the internal wall of the housing 2, sealing and water-proof of interior can be enabled by a simple structure without using the O-rings and case-cap as in the conventional examples, and cost reduction can be enabled.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a small submersible pump.

Structure of conventional example and its problems FIG. 2 is a sectional view of a conventional submersible pump. The motor 1 is housed in a case 11, and the case 112 is sealed with a case cap 12 at the rear of the motor 1. A hole 13 for positioning the motor 1 is provided inside the case 11, and a bearing portion 14 of the motor 1 is fitted into the hole 13.

Further, the output shaft of the motor 1 is sealed with an oil seal 15. On the other hand, a lip 16 is provided inside the case 11 to lock and position the motor 1. A rubber sheet 17 is provided on the rear surface of the motor 1, and the case cap 12 suppresses and fixes the motor 1 via the rubber sheet 17. An O-ring 18 for waterproofing is sandwiched between the case 11 and the case cap 12.

However, in this structure, since the motor 1 is in direct contact with the case 11, the vibration force of the motor 1 is transmitted to the case 11, generating noise. Further, there was a problem that the structure became complicated and the cost increased.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems and provides a submersible pump with low noise and a simple structure.

3. Structure of the Invention The present invention provides a first elastic body with a shaft sealing function on the output shaft side of the motor, and a second elastic body on the other side of the motor. By fixing it so that it does not come into direct contact with the housing, the vibrations of the motor are not transmitted to the housing.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to the sectional view of FIG.

1 is a motor, which is housed in a housing 2.

An elastic body 3 is provided on the front surface of the motor 1 on the output shaft side, and wraps around the front surface of the motor 1, and its outer edge 4 is press-fitted into the gap between the motor 1 and the inner wall of the housing 2. The simulator 1 is positioned so as to have a certain gap between it and the side surface of the nozzle 2. Furthermore, elastic body 3
is equipped with a shaft sealing device 6 for sealing the output shaft 5 of the motor 11.

On the other hand, an elastic body 7 is provided on the rear surface of the motor 1.

The elastic body 7 has four parts at its center, into which the bearing part 8 of the motor 1 is fitted. Furthermore, the outer edge of the elastic body 7 is pressed against the inner wall of the housing 2 and supported by a protrusion 9 provided inside the housing 2.

In this way, the motor 1 is housed in the housing 2, sandwiched between the elastic body 3 and the elastic body 70, and is fastened and fixed by the cap screw 10 from the outside of the elastic body 3.

As described above, since the motor 1 is in contact with only the elastic bodies 3 and 7, vibrations are less likely to be transmitted to the housing 2, thereby significantly reducing noise. In addition, since the elastic body 3 is tightened by the cap screw 10, the outer edge of the elastic body 3 is pressed against the inner wall of the housing 2, and the interior can be sealed and waterproofed without using the conventional O-ring and case cap. .

Effects of the Invention The present invention provides elastic bodies on the front and rear surfaces of the motor,
By fixing the motor so that it does not come into direct contact with the housing, noise can be significantly reduced. Furthermore, by providing one of the elastic bodies with a shaft sealing function and a function of sealing and waterproofing the inside of the housing, a submersible pump with a six-panel design, simple structure, and low cost is realized.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a submersible pump according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional submersible pump. 1...Motor, 2...Housing, 3
...River/elastic body, 4...Outer edge, 5...
・Output shaft, 6... Shaft sealing device, 7... Elastic body, 8... Bearing part, 9... Convex part,
1o...Press screw. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 2

Claims (1)

[Claims] a motor; a housing that accommodates the motor; and a housing that wraps one side of the motor, with an outer edge interposed between the motor and an inner wall of the housing to close the gap between the side surface of the motor and the inner wall of the housing. a first elastic body having a shaft sealing function for holding the output shaft of the motor and sealing the output shaft of the motor; and a second elastic body that is interposed between the other surface of the motor and the inner wall of the housing to fix the motor. A submersible pump, comprising: an elastic body; and a retaining screw for tightening and fixing the motor via the first elastic body.