JPH01175821A - Floor nozzle for cleaner - Google Patents

Abstract

PURPOSE:To reduce substantially noises caused by rotational vibration by coupling integrally respective bearings at the belt pulley side of an air turbine and rotary brush to be supported vibrationlessly by a floor nozzle body. CONSTITUTION:A belt pulley 14 is provided between both bearings 13a, 13b supporting an air turbine shaft 4 and near the bearing 13b at the opposite side to the air turbine. A housing section 15 for supporting integrally the bearing 13b and a bearing 7b of a rotary floor brush 7 is supported through a vibration preventing body 16 on a floor nozzle body 3. The bearings 13b, 7b at the belt pulley side of air turbine 1 and rotary floor brush 7 are coupled integrally by the housing section 15 which is vibrationlessly supported by an elastic body 16 on the floor nozzle body 3, so that a main portion of rotational vibration is insulated vibrationally to reduce substantially noises caused by the rotation of rotary floor brush or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a floor nozzle for a vacuum cleaner for domestic use.

2. Description of the Related Art A conventional floor nozzle for a vacuum cleaner having an air turbine type rotating floor brush will be described with reference to FIGS. 2 and 3. 1
is an air turbine having a plurality of blades 1a, and is supported within a floor nozzle body 3 by a bearing 2 so as to be rotated by the intake airflow. Bearing 2 is two metal bearings 21L,
2b and a holder 2C containing them.

A pulley 6 constituting a belt speed reducer is provided at the end of the shaft 4 of the air turbine 1 that rotates due to the intake airflow.

Reference numeral 6 denotes an air suction port, through which airflow is vigorously sucked in and hits the blades 12L of the air turbine 1, causing the air turbine 1 to rotate.

7 is a rotating bed brush, and bearings 71L are provided at both ends.
, 7b within the floor nozzle body 3. A large number of brushes 8 are flocked on the outer periphery of the rotating bed brush 7, and a belt pulley 9 constituting a speed reducer provided at one end is connected to the air turbine 1 via a belt 10. 11 is a vacuum cleaner suction extension pipe (not shown)
This is an air communication hole that communicates with the

Next, the operation of the conventional example will be explained. When the floor nozzle body 3 is connected to the suction extension pipe of a vacuum cleaner and the vacuum cleaner is operated, dust and air forcefully flow in from the suction port 6 of the floor nozzle body 3, and the blades 1a of the air turbine 1 , causing the air turbine 1 to rotate at high speed. The rotary floor brush 7 connected by a belt speed reducer rotates to scrape out dust from the hairs of the carpet, etc., thereby achieving efficient cleaning.

Problems to be Solved by the Invention As mentioned above, a floor nozzle using an air turbine-type rotating floor brush is an excellent floor nozzle in that it can easily and efficiently clean carpets. The drawback is that it is noisy. The reason for the loud noise is
There are many possibilities, but since the air turbine 1 rotates at high speed, vibrations due to unbalanced rotation of the air turbine 1 itself, vibrations generated from the belt reducer, vibrations of the rotating floor brush 7, vibrations generated from the bearings, etc. Main body 3
The main cause is that these vibrations are synthesized. In order to reduce the noise caused by vibrations caused by these rotations, it is effective to support the above-mentioned rotating parts from the floor nozzle main body 3 in a vibration-isolated manner. but,
Air turbine bearing 2 and rotating bed brush bearing 7a,
7b to the floor nozzle main body 3 via an elastic body such as rubber, the tension of the belt 1o connecting the air turbine 1 and the rotating floor brush 7 becomes unstable, and the tension between the air turbine shaft 4 and the rotating floor brush 7 becomes unstable. The parallelism of the axes 12 of 7 cannot be maintained, causing slippage or conversely causing noise. Therefore, it is currently difficult to support these rotating bodies on the floor nozzle main body 3 in a vibration-proof manner.

The present invention solves these conventional problems,
The purpose is to provide a floor nozzle for a vacuum cleaner with low noise.

Means for Solving the Problems In order to achieve the above object, the present invention integrally connects the bearing on the belt pulley side of the air turbine and the bearing on the belt pulley side of the rotary floor brush by a housing part, and connects this housing part to the floor. It is supported by the nozzle body in a vibration-proof manner.

By taking the above measures, it is possible to tension the belt connecting the air turbine and the rotating bed brush with high precision and with appropriate tension, and also to connect the bearing on the side of the belt pulley, where the vibration is greatest, to the floor nozzle body. However, since it can provide anti-vibration support,
Noise caused by the rotation of air turbines, rotating floor brushes, etc. can be significantly reduced.

EXAMPLE An example of the present invention will be described below with reference to FIG. The overall structure is similar to the conventional example shown in FIGS. 2 and 3, so the same members are given the same reference numerals, detailed explanations are omitted, and differences will be mainly explained.

In the figure, 132L and 13b are both bearings that support the air turbine shaft 4, and a belt pulley 14 is provided between the two bearings 13a and 13b and near the bearing 13b on the side opposite to the air turbine. Reference numeral 16 designates a housing portion that integrally supports the bearing 13b and the bearing 7b of the rotating floor brush 7, that is, the bearing on the belt bobbin side, and is vibration-proofly supported by the floor nozzle main body 3 via the vibration isolator 16. The vibration isolator 16 is made of a highly elastic material such as foam rubber, and is interposed between the nozzle body 3 and the nozzle body 3. It is supported by anti-vibration.

Next, the operation of the above configuration will be described. Among the noise from the current floor nozzle shown in the conventional example, we analyzed the vibration transmission path caused by rotational vibration and found that the vibration transmitted from the belt pulley side bearing to the floor nozzle body is the largest cause of noise. It became clear that it was. The cause of this is due to the belt installation accuracy, and periodic fluctuations in the belt tension combine with the vibrations of the air turpinto rotary floor brush 7, increasing the vibrations of the bearing on the belt boolean side. In this embodiment, the bearings 13b and 7b on the belt pulley side of the rotating bed brush 7 of the air turbine 19 are...
This...Using part 16 is vibration-proofly supported on the floor nozzle body 3 using the elastic body 1e, so the main part of rotational vibration is vibration-isolated, and the belt installation accuracy is poor. On the contrary, the housing part 16
It is relatively easy to improve the accuracy of the belt, improve the accuracy of the center distance, and stabilize the belt tension. Further, if each bearing on the side opposite to the belt boob is further vibration-proofed, noise can be further improved.

Effects of the Invention As described above, in the floor nozzle for a vacuum cleaner of the present invention, the six bearings on the belt pulley side of the air turbine and rotating brush are integrally supplied in the housing part, and are supported by the floor nozzle body in a vibration-proof manner. By doing so, the noise caused by rotational vibration can be greatly reduced, and the problems of the conventional technology can be eliminated.

[Brief explanation of the drawing]

Fig. 1 is a partial sectional view of a floor nozzle for a vacuum cleaner showing an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of a conventional floor nozzle for a vacuum cleaner, and Fig. 3 is a cross-sectional view of the same floor nozzle. be. 1°°°° Pa air turbine, 7... Rotating floor brush, 7b, 13b... Belt pulley side bearing, 10... Belt, 16... Housing Department.

Claims (1)

[Claims] It has an air turbine rotated by the suction airflow, a rotating bed brush connected to the air turbine via a belt reducer, a bearing on the belt pulley side of the air turbine, and a bearing on the belt pulley side of the rotating bed brush. A floor nozzle for a vacuum cleaner which is integrally connected by a housing part and which is vibration-proofly supported by a floor nozzle body.