JPH09151989A - Damper device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To absorb the vibration sound generated from a pump or the like by a damper device to effectively prevent the noise by amplification of the vibration sound. SOLUTION: A damper device 9 is formed of a columnar cylinder part 18 and a pair of pressing shafts 20 fixed to mounting parts 19. The mounting parts 19 are circularly formed, and tapered cylindrical parts 23 are provided on the tips of the pressing shafts 20. Through-holes 27 for inserting the pressing shafts 20 are formed in the center parts of both vertical surfaces of the cylinder part 18. A compression spring 22 is provided within the cylinder part 18, and the tapered cylindrical parts 23 of the pressing shafts 20 are fitted to both the vertical ends thereof. The vibration sound generated from a pump 1 is absorbed and damped by the damper device 9, whereby the noise by amplification of the vibration sound can be effectively prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper device for preventing vibration generated by a pump or the like. More specifically, the present invention relates to a damper device that is provided between a motor that drives a pump and a housing to absorb vibration generated by the pump and prevent noise.

[0002]

2. Description of the Related Art For example, a pump for transferring a liquid or the like is usually connected to a motor and the motor side is fixed to the housing side. FIG. 4 shows a conventional example of such a mounting structure for a motor and a housing.

A suction pipe 4 connected to a water storage tank (not shown) is connected to one end of the pump 1. The liquid sucked through the suction pipe 4 by the pump 1 is pumped through the discharge pipe 5. A pair of mounting seats 6 is provided on a part of the peripheral surface of the motor 2, and a cylindrical fixing member 7 is interposed between the mounting seats 6 and the housing 3 to mount the motor 2 on the housing 3.
Has been fixed. That is, the lower end portion of the fixing member 7 is fixed to the housing 3 side, and the upper end portion is fixed by the screw 8 or the like inserted from the through hole of the mounting seat 6. A gear pump having a simple structure and a low component cost is often used as a pump for pumping such a liquid.

[0004]

In the conventional mounting structure shown in FIG. 4, the vibration sound of the pump 1 is transmitted to the motor 2,
Further, this vibrating sound is amplified in the housing 3 and causes noise. This is particularly noticeable when the gear pump as described above is used for the pump 1. That is, the gear pump has a structure in which a pair of gears are meshed with each other to pump the liquid sucked from the tooth space.

For this reason, when a gear meshing failure or the like occurs due to wear of the gear, vibration noise increases due to uneven rotation of the gear or torque fluctuation.

Therefore, the present invention solves the above-mentioned problems and proposes a damper device that absorbs vibration noise generated from a pump to prevent noise.

[0007]

In order to solve the above-mentioned problems, according to the present invention, a damper device for fixing a motor for driving a member generating a vibration noise such as a pump to a housing side is provided. Has a mounting portion and a tubular portion, a pressing shaft is fixed to the mounting portion, a compression spring is provided in the tubular portion,
A through hole is formed on both upper and lower sides of the pressure shaft,
The pressing shaft is configured to elastically press the compression spring.

Since the compression spring in the damper device expands and contracts with the vibration, the expansion and contraction absorbs and attenuates the vibration noise generated from the pump. As a result, the amplification of vibration noise can be attenuated and noise can be prevented.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a damper device according to the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the structure of a damper device 9 which is an embodiment of the present invention. The figure shows an example in which the damper device 9 is applied to the sanitary washing device 10.

First, the sanitary washing device 10 will be briefly described. The sanitary washing device 10 has a nozzle attachment portion 11 to which a washing nozzle (not shown) for ejecting washing water is attached.
And the control unit 12. The control unit 12 is entirely cylindrical and is covered with an outer cover 13 made of a hard resin. One end of the nozzle mounting portion 11 is fixed to the control portion 12 side, and the lower surface of the nozzle mounting portion 11 is mounted to the rear end portion of the opening peripheral portion 14 of the toilet bowl 26 via a suction plate (not shown) or the like. As a result, the sanitary washing device 10 is attached / fixed to the side of the toilet 26.

Below the control unit 12, a pump 1 and a motor 2 are provided.
Is arranged. Suction pipe 4 connected to pump 1
Is taken out from the outer cover 13 and connected to an external water storage tank or the like. A tank 15 is arranged above the pump 1, and the tank 15 and the pump 1 are connected by a discharge pipe 5.

A cleaning tube 16 for supplying cleaning water to the cleaning nozzle is connected to the upper portion of the tank 15.

In order to feed the washing water to the washing nozzle, the motor 2 is driven, and the pump 1 connected to the motor 2 sends the washing water to the tank 15 through the discharge pipe 5 to the washing nozzle through the washing tube 16. Send wash water.

In this example, as shown in FIG. 2, the motor 2 for driving the pump 1 for pumping the wash water as described above is attached and fixed to the outer cover 13 which is a housing via the damper device 9.

Therefore, in the example shown in FIG.
Semicircular mounting seats 17 are fixedly installed at the locations (only two locations are shown in the figure).

As shown in FIG. 3, the damper device 9 comprises a cylindrical tubular portion 18 and a pressing shaft 20 fixedly mounted on a pair of mounting portions 19 located above and below the cylindrical tubular portion 18. The mounting portion 19 is formed in a disc shape, and is located inside the tubular portion 18 and includes the pressing shaft 2.
The tip end portion of 0 is provided with a tapered columnar portion (reverse conical portion) 23 which is tapered toward the tip. A screw hole 21 reaching the pressing shaft 20 is formed at the center of the upper portion of each mounting portion 19.

The pressing shaft 2 is provided at the center of the upper and lower surfaces of the tubular portion 18.
Through holes 27 for inserting 0 are formed respectively. A compression spring 22 having a relatively large wire diameter is provided in the tubular portion 18, and tapered columnar portions 23 of the pressing shaft 20 are fitted to the upper and lower ends thereof, respectively.

The motor 2 is attached to the outer cover 13 by using the damper device 9 thus constructed as follows. As shown in FIG. 1, first, the through hole of the mounting seat 17 and the screw hole 21 of the mounting portion 19 are aligned, and both are fixed by the screw 25. Further, one mounting portion 19 is fixed to the outer cover 13 with a screw 25 inserted through the through hole of the outer cover 13.

Here, when the compression spring 22 is in the free state,
The height L of the damper device 9 shown in FIG. 3 is preferably slightly larger than the distance X between the lower surface of the mounting seat 17 and the outer cover 13 shown in FIG. In this case, in order to mount the motor 2 on the outer cover 13 by the damper device 9, the pressing shaft 20 is slightly pressed against the elastic force of the compression spring 22. This is because the compression spring 22 is provided with elasticity when the damper device 9 is attached.
This is to improve the vibration absorption rate of. Actually, the vibration transmitted from the pump 1 through the motor 2 causes the pressing shaft 20 of the damper device 9 to be vertically displaced relative to this vibration, whereby the compression spring 22 expands and contracts to absorb and damp the vibration.

As a result, the vibration generated from the pump 1 is not transmitted to and amplified by the motor 2, and noise can be prevented.

Further, in this example, as shown in FIG.
An anti-vibration material 24 such as elastic rubber is provided at a connecting portion between the motor 2 and the motor 2. As a result, the vibration sound generated from the pump 1 is absorbed by the vibration isolator 24, and the noise can be more effectively prevented.

Further, even if some shock is applied to the outer cover 13, this shock force is almost absorbed by the damper device 9 attached to the outer cover 13, and is transmitted to the motor 2 and the pump 1 inside the control unit 12. The impact force generated is alleviated. Therefore, the motor 2 and the pump 1 are not adversely affected by such an impact, so that the present invention is suitable for minimizing noise and applying to the sanitary washing device described above.

[0024]

As described above, the present invention is a damper device for fixing a motor for driving a vibration-generating member such as a pump to the housing side, which has a pair of mounting portions and a tubular portion. The pressing shaft is fixed to the mounting part, the compression spring is provided in the cylindrical part, and the through holes through which the pressing shaft can be inserted are formed on both upper and lower surfaces of the pressing spring so that the pressing shaft elastically presses the compression spring. It is configured to do.

Therefore, according to the present invention, the vibration sound generated from the pump or the like can be absorbed by the damper device, and the noise due to the amplification of the vibration sound can be effectively prevented.

[Brief description of the drawings]

FIG. 1 is an embodiment of a damper device 9 according to the present invention.

FIG. 2 is an enlarged view showing a mounting structure of a motor 2 and an outer cover 13.

FIG. 3 is an enlarged cross-sectional view showing the configuration of a damper device 9.

FIG. 4 is an enlarged view showing a conventional mounting structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pump 2 Motor 9 Damper device 10 Sanitary washing device 12 Control part 13 Outer cover 18 Cylindrical part 19 Mounting part 20 Pressing shaft 22 Compression spring 23 Tapered cylindrical part 24 Vibration isolator

Claims (2)

[Claims] 1. A damper device for fixing a motor for driving a member generating vibration noise such as a pump to a housing side, the damper device having a pair of mounting portions and a tubular portion, and the mounting portion being pressed. A shaft is fixed, a compression spring is provided in the tubular portion, and through holes through which the pressing shaft can be inserted are formed on both upper and lower surfaces thereof so that the pressing shaft elastically presses the compression spring. A damper device characterized by being configured. 2. The damper device according to claim 1, wherein a vibration damping material having elasticity is provided at a connecting portion between the pump and the motor.