JPH03212248A - 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] Industrial applications The present invention relates to a vacuum cleaner.

Conventional technology Some suction devices attached to vacuum cleaners have the function of raking up dirt and polishing the floor by rotating a brush or wiping member using a motor. . With this configuration, for example, it is possible to scrape up and suck up cotton dust, hair, etc. entangled in a long-pile carpet, or to simultaneously wipe away dirt adhering to the floor while sucking up dirt.

Hereinafter, the configuration of a conventional rotary brush will be explained based on FIG. 5. Note that FIG. 5 shows a partial cross section. 2
7 is a cylindrical body, 28 is a brush planted in the cylindrical body 27,
29 is a rotating shaft fixed to the cylindrical body 27. 3
0 is a pulley for transmitting power from the power transmission belt to the rotating shaft 29. 31-≠#K# is a member for rotatably holding the rotary shaft 29, and this bearing is fixed to the main body case. A bearing 35 is a metal bearing provided on the member 31 to receive the rotating shaft 29.

Reference numeral 37 is a protrusion provided at the end of the cylindrical body 27, and a portion of the member 31 of the bearing is in a state covered with this protrusion 37.

Problems to be Solved by the Invention With the above configuration, cotton waste, hair, etc. wrapped around the protrusions 37 at both ends of the cylindrical body 27 gradually move outward during continued use, and in some cases, Projection 3
The end face of 7 and the bearing may get into the gap 39 between the member 31.

Even if cotton waste or the like gets into the gap 39 in this way, the user often does not notice it. Then, the amount gradually increases, and eventually becomes hard (pressed), and the bearing rubs against surrounding members such as the member 31, generating large frictional heat, resulting in seizure and the like.

The present invention has been made in view of this problem, and an object of the present invention is to provide a vacuum cleaner that can prevent cotton dust and the like from entering gaps near bearing members.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention has a tapered portion at both ends of a rotating cleaning member, which is coaxial with the rotating shaft and whose diameter gradually decreases as it progresses from the end to the root. form,
A bearing for rotatably holding the rotating shaft has a recess formed in the member to receive the tip of the tapered portion.

Effect With the above structure, cotton waste, etc. wrapped around the taper part is tightened by the rotation of the rotating cleaning member, but these cotton waste, etc. are swept over the taper part from the larger diameter part. It will slide in the direction toward the smaller portion, and these cotton debris will accumulate at the root of the tapered portion.

Example Examples of the suction tool of the present invention will be described below.

FIG. 1 shows the internal structure of the vacuum cleaner of this embodiment with the top cover removed. In FIG. 1, 1 is a suction tool. 2 is a main body case, and 3 is a connecting pipe connected to a suction pipe extending from the vacuum cleaner main body (not shown), and is rotatable with respect to the suction tool 1. Reference numeral 4 denotes a rotary brush constructed by planting brushes on a cylindrical body, and numeral 5 denotes a wiping member constructed in a cylindrical shape, both of which are partially exposed from the bottom. A DC motor for rotating the rotary brush 4 and the wiping member 5 is provided inside the main body case 2 . Reference numeral 6 denotes a power transmission belt for transmitting the rotational force of the DC motor to the rotary brush 4. However, a one-way clutch is interposed between the drive shaft of the DC motor and the rotary brush 4, and a one-way clutch is also interposed between the drive shaft of the DC motor and the wiping member 5. When this DC motor rotates in a certain direction, the power is transmitted to the rotary brush 4, and when it rotates in the opposite direction to the above direction, the power is transmitted to the wiping member 5.
power is transmitted to.

FIG. 2 shows in detail the configuration of the rotary brush 4 and the configuration for transmitting power to the rotary brush 4, and partially shows a cross section. 7 is a cylindrical body, and 8 is a nylon brush attached to the cylindrical body 7. 9 is a rotating shaft, and the rotating shaft 9 and the cylindrical body 7 are fixed to each other.

Reference numeral 10 denotes a pulley for transmitting the power from the belt 6 to the rotating shaft 9. Bearings 11 and 12 are members for rotatably holding the rotary shaft 9.

The bearing member 11 and the bearing member 12 are fixed to the main body case 2, so that the rotary brush 4 is rotatably held in the main body case 2. 13 is the rotating shaft 9
This is a rotating corner brush fixed to the end of the corner. The rotating corner brush 13 is located at the end of the main body case 2, so that it can effectively scrape up dirt from the corner between the floor and the wall, for example.

FIG. 3 is an enlarged view of one end of the rotary brush 4 shown in FIG. 2. 14 is a one-way clutch mechanism incorporated inside the pulley 10, which transmits the rotational force to the rotating shaft 9 only when the pulley 10 rotates in the direction of arrow A, and when the pulley 10 rotates in the opposite direction. is constructed so that no power is transmitted. A bearing 15 is a metal bearing provided on the member 11 to receive the rotating shaft 9. The bearing 16 is a recess formed on the surface of the member 11 facing the rotary brush 4. Further, the bearing member 12 has substantially the same structure as the bearing member 11, and is provided with a metal bearing, and has a recessed portion similar to the recessed portion 16 formed therein.

Reference numerals 17 and 18 are tapered portions that project from both ends of the cylindrical body 7 and have an outer diameter smaller than that of the cylindrical body 7. The tapered portions 17 and 18 are coaxial with the rotating shaft 9, and have a tapered shape in which the outer end has the largest diameter (and the diameter gradually decreases from the outer end toward the base side). Note that this taper portion 17, 18 is not provided with a brush.The outer end of the tapered portion 17 is formed in the member 11 and inserted into the recess 16, and the outer end of the tapered portion 18 is inserted into the recess 16. The bearing is inserted into a recess formed in the member 12, with parts of the bearing member 11 and the bearing member 12 covering the tapered portions 17 and 18, respectively.

Next, the operation will be explained. When a predetermined operation is performed on the main body side, the electric suction device inside the main body performs a suction operation, and the motor directly facing the suction rotates in the forward direction, and the rotary brush 4
rotates. Then, the user moves the suction device 1 back and forth on the floor (carpet, etc.). Cotton dust, hair, etc. on the floor are scraped up by the rotary brush 4 and sucked off by the suction operation of the electric suction device.

By the way, at this time, it is unavoidable that some cotton waste, hair, etc. become wrapped around the columnar body 7. However, if it gets wrapped around the cylindrical body 7, it can be removed relatively easily by the user.

In addition, cotton waste, hair, etc. will also wrap around the tapered portions 17 and 18 formed at both ends of the cylindrical body 7. The cotton waste and the like once wrapped around the tapered portions 17 and 18 are tightened by the rotation of the rotary brush 4. However, the tapered portion 17 and the tapered portion 18
has a tapered shape as described above, so when cotton waste, etc. is tightened on the tapered surface, it is trapped at the base of the tapered part 17 and the tapered part 18, as shown by 20 in FIG. It will be accumulated. in this way,
Even if cotton waste or the like is wrapped around the body, if it gathers at the bases of the tapered portions 17 and 18, it can be removed relatively easily by the user.

Furthermore, if cotton waste etc. enters the gap 19 between the end face of the tapered portion 17 and the bearing member 11, the cotton waste etc. will wrap around the rotating shaft 9. Since parts of the bearing member 11 and the bearing member 12 cover the tapered portions 17 and 18, respectively, cotton dust and the like will not enter the gap 19.

Effects of the Invention As described above, the present invention has a rotating cleaning member constructed by planting brushes on the side surface of the rotating cleaning member. The bearing that rotatably holds the rotating shaft is formed with a tapered part whose diameter gradually becomes smaller as it progresses from the end to the base. The cotton waste, etc. wrapped around the holder is tightened by the tapered part by the rotation of the rotating cleaning member, but these cotton waste, etc. slide on the taper part in the direction from the large diameter part to the small diameter part, and these cotton waste, etc. Cotton waste and the like are accumulated at the base of the tapered portion. Therefore,
Cotton dust, etc. will not get into the narrow gap between the end face of the rotating cleaning member and the bearing, which will prevent it from being damaged due to seizure or preventing the rotation of the rotating cleaning member, as in the conventional case. There isn't.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the internal structure of a suction tool for a vacuum cleaner according to an embodiment of the present invention, and Fig. 2 is a cross-sectional view showing a main part of a rotary brush provided in the suction tool. 3 is an enlarged sectional view of the main parts of the rotary brush in Fig. 2, Fig. 4 is a sectional view of the main parts of the rotary brush in the operating state, and Fig. 5 is a sectional view of the main parts of the rotary brush in the operating state. FIG. 2 is a sectional view of a main part of a rotary brush used in a conventional vacuum cleaner. 1: Suction tool 2: Main body case 4: Rotating brush 5/wiping member 6: Power transmission belt 7: Cylindrical body 8: Brush 9:
Rotating shaft 10: Pulley 11, 12: Bearings are members 14: One-way clutch mechanism

Claims (1)

[Scope of Claims] A rotating cleaning member having a rotating shaft protruding from both ends, a power transmission means for transmitting power from a motor to the rotating shaft, and a bearing for rotatably holding the rotating shaft in a main body. a bearing member provided with the rotary cleaning member; a tapered portion coaxial with the rotating shaft and having a diameter that gradually decreases as it progresses from the end to the root portion is formed at both ends of the rotary cleaning member; A vacuum cleaner in which a recessed portion is formed to accommodate the tip of the tapered portion.