JPH0464256B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a floor nozzle for a vacuum cleaner equipped with a rotating brush rotated by a turbine.

2. Description of the Related Art This type of floor nozzle used in conventional domestic vacuum cleaners has a structure as shown in FIGS. 2, 3, and 4. In the figure, reference numeral 1 denotes a turbine wheel having a plurality of blades and rotated by an intake air flow, and is supported by a bearing unit 9. 3
is a rotating brush, which is connected to the turbine shaft 5 by a timing belt 4. The turbine shaft 5 has the turbine wheel 1 fixed to one end and a belt pulley 5a at the other end. 6 is the turbine wheel 1
It is a turbine chamber containing a vacuum cleaner, and is connected to a vacuum cleaner extension pipe and further to a vacuum cleaner body (not shown) via an intake communication hole 7. Further, the turbine chamber 6 is provided with an intake communication hole 7 and a nozzle hole 8, which guides the airflow that rotates the turbine wheel 1 and sucks in dust, at positions facing each other with the turbine wheel 1 interposed therebetween. The jet flow sucked together with dust from the nozzle hole 8 collides with the blades of the turbine wheel 1, causing the turbine wheel 1 to rotate. Regarding the configuration of the bearing unit 9,
This will be explained below using FIG. 7. Bearing unit 9
is composed of a substantially cylindrical bearing holder 12 and sliding bearings 11 press-fitted into both ends of the bearing holder 12. Moreover, this bearing unit 9 is connected to the floor nozzle body 1.
It is held by being pinched by 0.

With the above configuration, when the cleaner body is driven, the jet flow sucked in from the nozzle hole 8 together with dust collides with the turbine wheel 1, causing the turbine wheel 1 to rotate at high speed. A rotating brush 3 connected by a timing belt 4 is then driven to scrape up and suction the dust on the carpet.

Problems to be Solved by the Invention However, in the configuration of the above conventional example,
In order to reduce the friction in the slide bearing 11 as much as possible, it was necessary to make the gap between the slide bearing 11 and the turbine shaft 15 relatively large. Therefore, when the turbine shaft 15 rotates at high speed, the sliding bearing 1
It was causing a lot of noise as it moved around inside the room. In addition, dust entered the bearing holder 12 from the belt pulley 5a side through the gap, causing a failure.

The present invention has solved these problems, and provides a floor nozzle for a vacuum cleaner, which aims to reduce the noise caused by the bearings and to prevent a reduction in the life of the bearings.

Means for Solving the Problems In order to achieve the above-mentioned object, the floor nozzle for a vacuum cleaner of the present invention includes a bearing holder, a turbine wheel rotated by an air flow taken in, and a turbine wheel fixed to one end and fixed to the other end. A turbine shaft provided with a belt pulley, a rotating brush connected to the turbine wheel by a belt, and containing the turbine wheel, with a nozzle hole for guiding air flow to rotate the turbine wheel on one side, and a vacuum cleaner extension pipe on the other side. and a turbine chamber each having a communicating intake passage hole, and the bearing of the turbine wheel is held by the floor nozzle body and includes a bearing holder externally fitted to the turbine shaft, and a bearing holder that is connected to the turbine shaft and the bearing holder. In addition to being provided in between,
It consists of a ball bearing located on the pulley side that also serves as a seal to prevent air leakage, and a sliding bearing located on the opposite side, and a gap is provided between the sliding bearing and the sliding bearing located on the turbine chamber side of the turbine shaft. A shaft retainer is provided on the pulley side, and a shaft retainer that contacts the inner ring of the ball bearing is provided on the pulley side.

Function As mentioned above, the floor nozzle for a vacuum cleaner of the present invention uses a ball bearing on the pulley side, where the tension of the belt is stronger, so that it is possible to apply stronger tension to the belt, which increases the power of the rotating brush. It is stable even during high-speed rotation and generates little noise. In addition, the ball bearing on the pulley side maintains an airtight space between the inside of the bearing holder and the outside air, and as a result, dust does not flow into the bearing holder.

Embodiment The embodiment will be described above with reference to FIG.
Note that the only difference from the conventional example explained in Figs. 2 to 4 is the bearing configuration of the turbine vehicle, so we will add an explanation of the same bearing configuration, and refer to the explanation of the conventional example for the configuration of other parts. .

In the figure, a turbine wheel 21 having a plurality of blades has a turbine shaft 22 protruding from one side thereof. A substantially cylindrical bearing holder 23 held by the floor nozzle body is externally fitted onto the turbine shaft 22 .

The turbine shaft 22 includes a plain bearing 24 provided at the end of the bearing holder 23 on the side of the turbine wheel 21 and a ball bearing 25 provided at the opposite end of the bearing holder 23.
It is pivoted by.

The ball bearing 25 also has a sealing mechanism to prevent air leakage, and its outer ring 26 is in contact with a retaining portion 28 of a housing portion 27 in the bearing holder 23. 29 is a shaft retainer corresponding to the inner ring 26' of the ball bearing 25, and 30 is a shaft retainer corresponding to the slide bearing 24, which are each fixed to the turbine shaft 22.

One shaft retainer 30 is located with a gap t from the plain bearing 24, and when the turbine shaft 22 rotates,
It is designed so that it does not come into contact with the slide bearing 24.

Further, the length of the housing portion 27 is greater than the width of the ball bearing 25, and as a result, the housing portion 27 is larger than the width of the ball bearing 25.
The outer end of the ball bearing 25 is set to protrude outward from the ball bearing 25 to protect the ball bearing 25 from shocks and the like.

31 is a belt stretched between a pulley 32 formed at the outer end of the turbine shaft 22 and a rotating brush, and is provided with gears.

In the above configuration, the tension of the belt 31 is mainly received by the ball bearing 25. Since the ball bearing 25 has low rotational resistance and minimal bearing loss, the rotational characteristics of the rotating brush can be improved. In other words, by increasing the tension of the belt 31, losses in rotation transmission such as idling can be minimized.

On the other hand, since the bearing of the turbine wheel 21 is a plain bearing 24, it is possible to significantly reduce costs compared to a case where both ball bearings are used.

By the way, the ball bearing 25 also has a sealing function to prevent air leakage, so even if there is a gap between the plain bearing 24 and the turbine shaft 22, dust will not enter the bearing holder 23 from the belt chamber. No intrusion.

Effects of the Invention As described above, the present invention provides a bearing holder in which a turbine shaft is pivotally supported by bearings provided at both ends of the bearing holder.
By using a sliding shaft on the turbine wheel side and a ball bearing with a sealing function on the pulley side to prevent air leakage, the following excellent effects can be achieved.

It is possible to maintain sufficient belt tension and reliably transmit rotation from the turbine wheel to the rotating brush.

Noise can be reduced in bearings, especially ball bearings where belt tension is applied.

Since there is no intrusion of dust into the bearing holder and there is no contact between the sliding bearing and its shaft retainer, the bearing characteristics are enhanced and excellent rotational characteristics can be obtained over a long period of time.

Compared to the case where both ball bearings are used, the cost can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a turbine wheel bearing showing an embodiment of the present invention, FIG. 2 is a cross-sectional view of a floor nozzle, and FIG.
The figure is a longitudinal sectional view of the same, and FIG. 4 is a sectional view of a conventional turbine wheel bearing. 21... Turbine car, 22... Turbine shaft, 2
3...bearing holder, 24...sliding bearing, 25
...ball bearing, 29,30...shaft retainer, 31...
...belt, 32...pulley.

Claims (1)

[Claims] 1 A turbine wheel rotated by an intake air flow, a turbine shaft to which the turbine wheel is fixed at one end and a belt pulley provided at the other end, a rotating brush connected to the turbine wheel by a belt, and a turbine wheel. a turbine chamber, each having a nozzle hole on one side for guiding an air flow for rotating a turbine wheel, and an intake communication hole communicating with a vacuum cleaner extension pipe on the other side;
The bearing of the turbine car has a bearing holder which is held by the floor nozzle body and externally fitted to the turbine shaft, and a bearing holder which is provided between the turbine shaft and the bearing holder, and which is located on the pulley side to prevent air leakage. It consists of a ball bearing that also serves as a seal to prevent this, and a sliding bearing located on the opposite side.
Further, a cleaning device characterized in that a shaft slip-off preventer is provided on the turbine chamber side of the turbine shaft with a gap between the turbine shaft and the slide bearing, and a shaft slip-off preventer that contacts the inner ring of the ball bearing is provided on the pulley side. Machine floor nozzle.