JPS6127597Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rotating drum type clothes dryer that uses a blower fan to guide hot air into a rotating drum to dry clothes, and in particular relates to a blower device including a fan pulley structure that drives the blower fan. It is.

Conventionally, in this type of clothes dryer, the blower fan is rotationally driven by a fan pulley with a V-groove that suspends the belt, but the related structure between the bearing metal that supports the fan pulley and the fan pulley has a bearing. Belt slipping occurs when lubricating oil scatters from the metal and adheres to the belt part, and especially during high-speed rotation, the fan pulley makes a thrust noise and the adjustment link makes a rattling noise, causing noise. The problem of time arose. especially,
In dehumidifying clothes dryers and the like that have recently become popular, the above-mentioned problems become apparent because the blower fan needs to rotate at high speed.

The present invention is intended to solve the above-mentioned conventional problems, and one embodiment thereof will be described below with reference to the accompanying drawings. In the figure, 1 is a main body of the dryer, and 2 is a rotary drum provided in the main body for storing objects to be dried, which is rotatably supported. Reference numeral 3 denotes a heater provided below the front surface of the rotating drum 2, and this heater 3 is fixedly held by an insulating member 4. Reference numeral 5 denotes a blower fan that guides the hot air heated by the heater 3 into the rotating drum 2. As the blower fan 5 rotates, the hot and humid air generated inside the rotating drum 2 is guided to the blower duct 6. Exhaust outside. The rotating drum 2 and the blower fan 5 are driven by a belt A8 by a drive motor 7.
and is rotationally driven via belt B9.

FIG. 2 shows an enlarged view of the structure of the driving part of the blower fan 5. The fan shaft 10, which is a rotating shaft fixed to the center of the blower fan 5,
It is supported by bearing metals 11a and 11b.
12 is a metal case, bearing metals 11a and 1
1b is press-inserted, and both metals 11a, 1
An oil-impregnated intermediate felt 13 is provided between 1b.
As a result, the bearing metal 11 made of sintered alloy
Lubricating oil is supplied to a and 11b.

Furthermore, in addition to the oil-impregnated intermediate felt 13, an oil-impregnated auxiliary felt 16a is provided using the oil guide felt 14 as a passage so that lubricating oil can be supplied auxiliary, and the cap 16 prevents oil from leaking on the fan pulley 15 side of the metal case 12. It's closed like that.

This oil-impregnated auxiliary felt 14 is necessary to ensure durability against high-speed rotation and temperature rise of the fan pulley 15.

In particular, regarding temperature rise, the area near the blower fan 5, which is unique to dryers, becomes high temperature during drying operation, so the oil supply structure to the bearing metals 11a and 11b must be designed with care to prevent locking. It has a vine structure.

The fan pulley 15 has bearing metals 11a, 1
It is inserted on the same axis as the fan shaft 10 which is loosely inserted into the fan shaft 10 and projected, and is fixed to the fan shaft 10 with the fixing screw 17. A plurality of fan pulley-side links 18 are loosely fitted between the fan pulley 15 and the bearing metal 11a in order to correct thrust play of the fan shaft 10 and eliminate wear. Similarly, the fan side link 19 is loosely fitted to the blower fan 5 side.

The fan pulley 15 is integrally provided with an annular rib 20 so as to be substantially orthogonal to the direction in which the belt B9 is suspended, and the annular rib 20 is formed to be close to and cover the bearing metal 11a. The annular rib 20 is erected inward from the thrust surface of the bearing metal 11a within a range of dimension A,
In addition, it is shaped so as to be close to and cover the bearing metal 11a so as not to impede rotation within the range of dimension B.

Note that 21 is a V-groove portion formed on the outer peripheral surface of the fan pulley 15.

In the above configuration, the fan pulley 15 is integrally provided with an annular rib 20 that is substantially orthogonal to the direction in which the belt B9 is suspended, and the annular rib 20 is formed in proximity to and covers the bearing metal 11a. As a result, when the fan pulley 15 rotates at high speed, lubricating oil is scattered from the fan pulley side link 18, and high temperature is transferred to the metal case 12 by the heated hot air from the blower fan 5, which is unique to dryers, and the lubricating oil is further The annular rib 20 prevents the lubricating oil from directly adhering to the V-groove portion 21 of the fan pulley 15 and the belt B9 when there is a possibility that the outflow of lubricating oil will increase. Therefore, it is possible to prevent the belt B9 from slipping, to prevent the occurrence of belt slipping noise, to prevent a decrease in the rotational speed of the blower fan 5, and to prevent a decrease in drying performance.

In addition, the fan pulley 15 and the bearing metal 11a
Even if a thrust sound is generated from the fan pulley side link 18 or a crackling sound is generated from the fan pulley side link 18, the annular rib 20 of the fan pulley 15 exerts a soundproof wall effect and has the effect of suppressing the noise to a minimum. .

As described above, the present invention prevents oil from adhering to the rotating drive part due to scattering of lubricating oil, especially in the metal bearing part that pivotally supports the blower fan of the dryer, when the blower fan rotates at high speed and in a high temperature atmosphere. This prevents belt slipping noise and slowdown of the fan's rotation, ensuring long-term drying performance. Further, according to the present invention, even if a thrust sound between the fan pulley and the bearing metal or a crackling sound is generated by the fan pulley side link, a soundproof wall effect can be exerted and the noise can be suppressed to a minimum.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a clothes dryer according to an embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of essential parts showing a drive section of a blower fan mainly including a fan pulley. 1...Dryer main body, 2...Rotating drum, 5...
Blowing fan, 7... Drive motor, 9... Belt B, 10... Fan shaft, 11a... Bearing metal, 15... Fan pulley, 18... Fan pulley side link, 20... Annular rib.

Claims (1)

[Scope of utility model registration request] The blower fan includes a rotating drum rotatably supported in a main body of the device, a blower fan that guides hot air from a heating element into the rotary drum, and a drive motor that rotationally drives the blower fan via a belt. A fan shaft fixed to the fan shaft is supported by a bearing metal that rotatably supports the blower fan, a fan pulley is fixed to the fan shaft protruding from the bearing metal, and a fan pulley is fixed to the fan shaft in the direction in which the belt is suspended. An air blowing device for a clothes dryer, wherein an annular rib is protruded substantially perpendicular to the bearing metal, and the annular rib is configured to be close to and cover the bearing metal.