JPS61290929A - Floor nozzle of vacuum cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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 driven by an air turbine.

2. Description of the Related Art Conventionally, in this kind of floor nozzle for vacuum cleaners, the air turbine that serves as the driving source for the rotating brush has a disc-shaped side plate with a large number of turbine blades each having a circular arc cross section arranged at equal intervals. A so-called once-through turbine, arranged in a circular shape, was used. The rotational force of the air turbine, which is driven by the suction airflow to the vacuum cleaner, is transmitted to the rotating brush via an intermediate transmission means such as a belt.
Problems to be Solved by the Invention Incidentally, in a once-through type turbine, the working airflow hits the turbine blades on each of the inflow side and the outflow side, so a high rotational speed can be obtained, and accordingly, the rotational speed in the same rotational region is high. θ is also high. However, since the airflow flows through the above-mentioned once-through type turbine, the start-up characteristics are poor, for example,
When starting the floor nozzle while it is in contact with a surface to be cleaned such as a carpet, there is a problem that the turbine does not rotate or it takes a long time to reach a predetermined rotation range.The present invention solves these conventional problems. To provide a floor nozzle for a vacuum cleaner that is easy to use and has excellent dust suction performance.

Means for Solving the Problems In order to solve these conventional problems, the present invention configures an air turbine that serves as a driving source for the rotating brushes by combining a once-through type turbine and a recirculating type turbine. The air turbine is equipped with a flow regulator that changes the direction of the suction air in the vent facing the air turbine. Therefore, while the torque at startup is very high, as the rotation speed increases, this torque decreases. On the other hand, once-through turbines have the opposite characteristics.

Therefore, these two turbines are combined into one turbine, and a flow regulator is provided that can be switched freely to the vent, so that when startup and high torque are required, the flow is switched to the recirculating air turbine side, and when high rotation is required, the flow is switched to the recirculating air turbine side. By changing the direction of the airflow to the once-through air turbine side, it is possible to select the characteristics more precisely according to the surface to be cleaned in accordance with the characteristics of the two air turbines.

Example Examples thereof will be described below with reference to the accompanying drawings.

In Figures 1 to 6, the floor nozzle body 1 is the bumper 2.
It is constructed by connecting upper and lower body members 3.4 via a suction chamber 6 with a lower opening as a suction port in its front interior, and a turbine chamber 6 in its rear interior. be. The turbine chamber e is separated from the suction chamber 6 by a partition wall 7, and has a generally cylindrical shape as a whole. Reference numeral 8 denotes a rotating brush that is provided in parallel to the suction chamber 6, with a part of the brush body 10 implanted in the rotor 9 protruding outside through the suction port; 11 is a rotating brush on both sides of the suction chamber 6; A bearing 13 is mounted on the bottom of the floor nozzle body 1 to position the suction port of the suction chamber 6 at a constant distance from the surface to be cleaned. These are wheels installed at the front and rear.

Reference numeral 14 denotes a substantially semi-cylindrical suction joint that is attached to the inner surface of the turbine chamber 6 so as to be rotatable in the vertical direction, and a part of its peripheral wall has a
A cylindrical connection port 16 is formed.

The above-mentioned suction joint 14 is provided with a side wall area protruding outward and has a transverse axis 16.
A hollow shaft 17 is pivotally supported on both side walls of the turbine chamber 6. Reference numeral 18 denotes a connecting tube rotatably attached to the connecting port 16 via a ring 19, to which an extension tube 20 communicating with the suction side of the vacuum cleaner via a hose is detachably connected. Reference numeral 021 denotes an air turbine provided on one side of the turbine chamber 6, and a shaft body 22 that penetrates the hollow shaft 17 of the suction joint 14 and projects to the outside of the turbine chamber extends from the negative side. 23
24 is a bearing of the shaft 22 provided on the floor nozzle main body 1, and 24 is a power transmission suspended between a small pulley portion 26 formed at the tip of the shaft 22 and a large pulley 26 provided on the rotating brush 8. This is a belt for. That is, the rotation of the air turbine 21 is transmitted to the rotating brush 8 at a reduced speed.

27 and 28 are two vent holes formed in the partition wall 7; one vent 27 faces the air turbine 21, and the other vent 28 does not face the air turbine 21 and is directly connected to the air turbine 21. It is centrally opposed to the connection port 16 of the suction joint 14. 29 is a shutter that opens and closes the vent 28;
30 is its operator.

Now, the entire operation of the floor nozzle of this embodiment will be explained.

When a vacuum cleaner is operated with the air vent 28 closed on the shutter 29, the dust-laden air flows through the suction chamber → suction chamber 6 → ventilation chamber 27 → turbine chamber 6 → connection chamber 16 → connection tube 18 → extension tube 20 → It flows through the hose and is sucked into the vacuum cleaner. Then, the air reaching the turbine chamber 6 from the vent 27 acts on the air turbine 21, causing it to rotate. The rotation of the air turbine 21 is transmitted to the rotating brush 8 via the belt 24.

Therefore, dust on the surface to be cleaned, such as a carpet, is scraped up by the brush body 10 of the rotating brush 8 and carried by the suction airflow to the vacuum cleaner.

Next, when the shutter 29 is operated to open the vent 28, air flows through the flow system from the vent 28 with low resistance to the connection port 15. That is, the flow takes a form that substantially bypasses the air turbine 21, thereby stopping the rotation of the air turbine 21 and the rotating brush 8.

In addition, in the above embodiment, the air turbine 211 is controlled to start and stop, but in some cases, this function may be eliminated,
It is also conceivable to drive this air turbine 21 all the time.

In addition, even in the case where the start/stop is controlled, the vents 27 and 28 are combined into one large opening, and one hole is formed in the shutter 29, and as the shutter 29 moves, this hole is used to release air. It is also conceivable to make it face the turbine 21 or not face it.

Now, the air turbine 21 described above has a body 31 having a substantially concave curved surface.
A large number of turbine blades 32? l- A recirculating type (Pelton type) turbine 33 arranged radially, and a once-through type turbine 3e having one end of each of a large number of turbine blades 36 arranged at equal intervals and circularly on one side of the side plate part 34. Turbine blades 3 of a once-through turbine 36 configured in combination in the axial direction
The tips of 6 are each open, in other words, they are in a cantilevered configuration.

Furthermore, the configurations of both turbines 33 and 36 will be explained in detail.

First, one of the recirculating type turbines 33 has a body 31 formed of a body member 37 having integrally formed turbine blades 32 and a side plate portion 34 of a through-type turbine 36 . The side plate portion 34 on the return flow turbine 33 side is tapered to form a continuous substantially concave curved surface together with the body member 37. 38 is integrally formed with the body member 37, and the shaft hole 3
The boss portion 9 has a plurality of concave portions 40 formed in the portion facing the side plate portion 34 .

Further, in the once-through type turbine 36, a shaft hole 41 whose tip has a small diameter is provided at the center of the side plate portion 34.
3 has an annular groove 42 on one side facing the recess 4.
A plurality of convex portions 43 corresponding to o are each formed in n.

The recirculating turbine 33 and the once-through turbine 36 are press-fitted into the shaft body 22 through their shaft holes 39.41i.

Of course, the tip of the shaft body 22 has a step corresponding to the small diameter portion of the shaft hole 41. Also, at this time, both turbines 33
．． The convex and concave portions 40 and 43 of 38 are engaged to exert an unifying effect in the rotational direction. 44 is a washer for preventing removal.

Furthermore, the outer diameter of the side plate portion 34 is the same as that of both turbine blade pieces 32,
By the way, the ventilation port 27 has a flow regulator 46 and an operation lever 46 that can be rotated left and right, and the airflow direction can be set to only one of the turbines 33 and 36. , and can be changed to both.

In the above configuration, first, if the flow regulator 46 is set toward the return flow type turbine 33, a large rotational torque can be obtained as described above; In this case, the rotational torque increases as the rotational speed increases by 4 to a certain value.

In this way, the characteristics of the air turbine 33, 36 can be selectively adjusted to suit the required characteristics, such as during start-up, which requires high torque, and surfaces to be cleaned with large resistance, and during steady state, which requires high rotation, and surfaces to be cleaned, which have low resistance. It can be switched to

Effects of the Invention In this way, the present invention configures an air turbine by combining a recirculation type turbine and a once-through type turbine, and uses a baffle plate to select the characteristics of both turbines. It can be selected according to the user's needs, and the usability can be greatly improved.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway top view of a floor nozzle showing an embodiment of the present invention with the upper main body member removed; Fig. 2 is a perspective view; Fig. 3 is a sectional view of the air turbine; The figure is an exploded cross-sectional view.
FIG. 6 is a perspective view of a double-flow type turbine, and FIG. 6 is a perspective view of a once-through type turbine. 8... Rotating brush, 21... Air turbine, 33... Double flow turbine, 36...
...Once-through turbine, 46...Fluid regulation. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 4 Figure 32 ・

Claims (1)

[Claims] The air turbine is equipped with an air turbine that is rotated by air drawn into the vacuum cleaner, and a rotating brush that is linked to the air turbine. A floor nozzle for vacuum cleaners that is equipped with a flow regulator that changes the wind direction at the vent facing the turbine.