JPH038799B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotary drum type clothes dryer that uses a blower fan to guide hot air into a rotating drum to dry clothes, and particularly to a drive device that rotationally drives the blower fan and the rotary drum. related to improvements.

Conventionally, in the configuration of a drive device for this type of clothes dryer, a drum transmission pulley for rotationally driving a rotating drum and a fan transmission pulley for rotationally driving a blower fan are each separately fixed to the shaft of a drive motor. Therefore, there is a need for a management system for the eccentricity of both pulleys, or for variations in the parallelism of the belt position during assembly due to variations in the installation of both pulleys on the shaft, and a system for managing the eccentricity of the motor for driving both pulleys. Since fixing screws are required for each fixing screw, the cost is high due to an increase in the number of parts and the number of assembly steps. Furthermore, since it is necessary to provide two parts, a drum transmission pulley and a fan transmission pulley, not only is the cost high, but when moving to an area where the power frequency is different, the two parts must be adjusted to the frequency of the new area. There were many inconveniences, such as having to make changes to accommodate the belt, requiring many parts and man-hours, and requiring skill in ensuring the parallelism of the belt.

In addition, there are other conventionally known devices of this type in which the drum transmission pulley and the fan transmission pulley are integrally constructed from a single material, such as those in which a synthetic resin material is used as the single material, and one in which the single material is made of steel. However, a general feature of this type of drive device is that when transmitting the rotational force of the drive motor to the rotating drum and blower fan, a 4-pole induction motor (50
The high rotational speed (Hz: 1500R.PM / 60Hz: 1800R.PM) is transmitted to the blower fan at around 2000R.PM, although the rotational speed varies depending on the size of the blower fan, while the rotation speed is transmitted to the rotating drum. Due to the centrifugal force caused by the rotation of the rotating drum, the rotation speed is reduced to around 55R.PM, which is the rotation speed at which the clothes stick to the peripheral wall of the rotating drum and tumble without rotating, so the reduction ratio is very high. Therefore, the contact angle with the belt on the drum transmission pulley side is very small, and the slip ratio is also large. As a result, when a synthetic resin material is used as a single material in this type of conventionally known device, heat is generated due to slippage with the belt on the drum booley side, and the thermal conductivity, which is a drawback of synthetic resin materials, is increased. Due to this, heat is accumulated on the drum booley side, resulting in poor durability and problems such as wear and destruction due to creep phenomenon. Furthermore, in the case of steel materials, precision in the diameter and surface roughness of the drum transmission pulley and fan transmission pulley is required, so cutting methods must be used, resulting in extremely high costs and a lack of mass production. There were some drawbacks.

The present invention overcomes the disadvantages of the prior art described above and provides a useful clothes dryer drive system.

Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

In the figure, 1 is the main body of the clothes dryer, 2 is rotatably supported by a rotary drum provided in the main body that accommodates items to be dried, and 3 is a driving motor. On the shaft 3a, a drum transmission pulley 4 made of steel or the like for rotationally driving the rotary drum 2 is integrally formed with a fan transmission pulley 6 made of a synthetic resin material for rotationally driving the blower fan 5 by insert molding. Of both the pulleys 4 and 6, only the drum drive pulley 4 is fixed with a fixing screw 7. Reference numeral 8 denotes a heater provided below the front surface of the rotating drum 2, and the heater 8 is fixedly held by an insulating member 9. An in-drum filter 10 for collecting dust from clothing is installed at the center of the rear surface of the rotating drum 2, and an exhaust port guide 11 is provided at the rear surface of the main body 1. Reference numeral 12 denotes a door provided in the main body 1 so as to be openable and closable so as to cover the clothes slot.

As the driving motor 3 rotates, the rotational force of the motor is transmitted from the drum transmission pulley 4 to the rotating drum 2 via the drum belt 13 to rotate it, while the fan belt 1 is transmitted from the fan transmission pulley 6 to the rotating drum 2.
4. Fan pulley 1 directly connected and fixed to fan 5
5 to the blower fan 5 to rotate it.
An idler pulley 16 provides tension to the drum belt 13 and is supported by an idler spring 17. Reference numeral 18 denotes a louver for intake air which is opened in the main body 1.

To explain the operation of the dryer in the above configuration,
Outside air is taken in through the louvers 18 and the like opened in the main body 1, and the air passes through the heater 8 and is sent into the rotating drum 2 as hot air. The hot air exchanges heat with the object 19 to be dried and becomes moist air, which passes through a filter 10 in the drum and is discharged to the atmosphere from an exhaust port guide 11, thereby drying the object 19 to be dried.

Next, to explain in detail the driving device which is the main part of the embodiment, the drum transmission pulley 4 is made of metal material such as steel, has a groove 4a for suspending the drum belt 13, and has a groove 4a for suspending the drum belt 13 in the center of the body. Screw 7
A screw hole 4b is provided, and several recesses 4c are provided so that a portion of the material of the fan transmission pulley 6 may flow into the fan transmission pulley 6 to form a strong connection. On the other hand, the fan transmission pulley 6 is made of a synthetic resin material, has a groove 6a for suspending the fan belt 14, has an outer shape so as to cover the end of the drum transmission pulley 4, and has a groove 6a for suspending the fan belt 14, and has an outer shape so as to cover the end of the drum transmission pulley 4. The built-up portion 6b is made smaller in diameter than the motor shaft 3a so as to abut and serve as a stopper guide.
has been established. By integrally forming the drum transmission pulley 4 with the fan transmission pulley 6 by insert molding, the material of the fan transmission pulley 6 flows into the concave portion 4c of the drum transmission pulley 4, and the convex portion 6c is formed, thereby forming the drum. The transmission pulley 4 and the fan transmission pulley 6 are firmly coupled to each other. Only the drum transmission pulley 4 is fitted onto the motor shaft 3a, and is locked to the cutter split portion 3b provided on the motor shaft 3a with fixing screws 7, so that the motor shaft 3a and the drum transmission pulley 4 are directly connected and fixed. . This configuration was made possible because when the dryer is operating, when the rotational force of the drive motor is transmitted to the rotating drum and the blower fan, there is a large difference in the rotational speed between the rotating drum and the blower fan. This places a heavy load on the drive side in the transmission to the rotating drum, that is, the drum transmission pulley 4, and on the other hand, on the drive side in the transmission to the blower fan, that is, the fan transmission pulley 6.
Since this would be a light burden, we focused on making both pulleys made of different materials and combining them rationally.In this embodiment, the drum transmission pulley that drives the rotating drum is made of a metal material such as steel and blows air. The fan transmission pulley that drives the fan is made of synthetic resin, and both pulleys are integrally formed by insert molding, and only the drum transmission pulley is directly connected and fixed to the drive motor shaft. It will have a certain effect. In other words, (1) Firm adhesion to the motor shaft can be obtained by simply fixing the transmission pulley side made of metal material such as steel, the motor shaft length can be configured rationally, and the fan transmission pulley The stopper guide, which is made up of built-up parts, not only makes it possible to install the fan transmission pulley very efficiently, but also allows the fan belt and drum belt to be assembled with high accuracy.

(2) Since the drum transmission pulley side, which has a higher rotational drive torque than the fan transmission pulley, is fitted and fixed to the motor shaft, the drum transmission pulley made of metal material such as steel, which has a high load, can be firmly fixed and lightweight. The fan transmission pulley held by the drum transmission pulley on the load side can also be securely fixed through insert molding of both.

(3) Since the drum transmission pulley is integrally molded with the fan transmission pulley, the amount of eccentricity of both pulleys with respect to the motor shaft is extremely small, and the distance between both pulleys is uniform, making it possible to obtain highly accurate products that can be used for both drum belts and fan belts. The correct position in relation to the
It prevents uneven contact and increases durability.

(4) Since the drum transmission pulley and the fan transmission pulley are integrated, it is easy to reassemble the parts when converting the frequency due to moving, and it also prevents mistakes in parts due to the combination of both pulleys. No skill required.

(5) Good durability can be achieved by using a metal material such as steel on the drum transmission pulley side, which has a high load, and a resin material on the fan transmission pulley side, which has a relatively light load. It will be done.

(6) By integrating the drum belt and the fan belt, the distance between the drum belt and the fan belt can be maintained uniformly, reducing management costs and providing stable quality.

(7) The motor shaft can be shortened and manufactured at low cost.

As described above, according to the present invention, it is possible to provide a drive device for a clothes dryer that is efficient in installation work, can be fixed securely, is highly durable, does not require skill, and has stable quality. .

[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 a cross-sectional view of a main part of its driving device. 1...Dryer body, 2...Rotating drum, 3...
Drive motor, 3a...motor shaft,
4...Drum transmission pulley, 5...Blower fan,
6...Fan transmission pulley, 7...Fixing screw,
13...Drum belt, 14...Fan belt,
15...Juan Pulley.

Claims (1)

[Claims] 1 A rotary drum is rotatably supported in the main body of the device, and a blower fan is provided for guiding hot air from a heating element into the rotary drum, and a drive fan is provided for driving the rotary drum and the blower fan via respective belts. A drum transmission pulley made of a metal material configured to be rotationally driven by a motor at the same time and configured to rotationally drive the rotating drum is integrally formed by insert molding with a fan transmission pulley made of a resin material that rotationally drives the blower fan, On the drive motor shaft, only the drum transmission pulley is directly connected and fixed, and a built-up part is provided so that the inner diameter of the fan transmission pulley is smaller than the diameter of the motor shaft, and the fan transmission pulley has a stopper guide. A clothes dryer drive device configured as follows.