JPS6127595Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a drum drive device for a clothes dryer.
In particular, the idler pulley shaft with the idler pulley attached to give the required tension to the V-belt for driving the drum can be installed more easily and inexpensively, and the motor holding bracket can be divided into two parts and the idler pulley shaft can be installed on one side. This makes it possible to construct the motor fixing and tension device from the same member.

The configuration of the drum drive device of a conventional clothes dryer is
This will be explained using FIGS. 1 to 3. The device body 1 includes a drum 2 and a motor 3.
is attached to the lower part of the main body by a motor holder 4 made of a steel plate bent into a U shape. Further, the motor 3 is supported by a motor holder 4 via two rubber washers 5 which serve both as insulation and fixation. Retained. When the motor rotates, a drum pulley 8 attached to the motor shaft rotates, and the drum 2 is rotated by the drum pulley 8 and the V-belt 9 hooked around the drum 2. The tension of the V-belt 9 is kept constant by an idler pulley 10.

In the above configuration, the idler pulley 10 is rotatably attached to one end of an idler pulley shaft 11 bent in a U-shape by a retaining ring 13, and the other end is connected to a support hole c provided in the motor holder 4 and a key. The stoppers a and b are inserted through the shaped holes d, and the idler pulley shaft 11 is set in a predetermined position. A spring 12 is provided between a portion 15 of the idler pulley shaft 11 and a portion 14 of the device body 1, and applies a required tension to the V-belt 9.

In the above structure, if the width x of the motor 3 corresponding to a large or small dryer changes, several types of motor holders 4 having different y widths must be manufactured. In addition, since the motor 3 was fixed via the rubber washer 5 with the screws 7 as described above, it took a lot of assembly time, and when the product was dropped upside down, the motor holder 6 would deform outward from the mounting screw part e. There was a high risk that the motor 3 would come off the holders 4 and 6 and fall. Furthermore, a spring 12 is required to obtain the required tension by the idler pulley shaft 11, and one end of the spring 12 is hung on a part 14 of the device body 1 formed of a thin iron plate that is easily deformed. was likely to move from a predetermined position, and the tension of the V-belt 9 was likely to become unstable.

The present invention solves the problems of the conventional clothes dryer, and embodiments of the present invention will be described below with reference to the drawings.

FIG. 4 is a longitudinal sectional view of the clothes dryer according to the present invention.
Fig. 5 is a perspective view showing the installation of the motor holder and idler pulley according to the present invention, Figs. 6 and 7 are a plan view and perspective view showing the installation of the idler pulley, and Fig. 8 is the motor holder and idler pulley according to the present invention. It is a side view showing pulley attachment. First, in Figure 4,
The device main body 101 includes a rotatably supported drum 1.
02, a fan 104 rotating within a fan case 103 is provided behind the drum 102, and a drum pulley 106 and a motor pulley 107 are fixed to the rotating shaft of a motor 105. This pulley 10
The drum 102 and the fan 104 are rotationally driven by a V-belt 108 and a fan belt 109 hooked on the drum 102 and the fan 104. 110 is a heating element, and a drum support plate 111 rotatably supports the drum 102.
and the front of the device main body 101 as appropriate. A bearing 1 that fixedly supports the drum 102 is provided on the outer periphery of the drum support plate.
13 is provided, and a large number of vent holes 114 are provided behind the heating element 110 to allow hot air to flow into the drum 102.

The air taken in by the rotation of the fan 104 flows through the air intake port 116 of the lid 115 and the air intake filter 11.
The hot air heated by the heating element 110 passes through the drum 10 through the vent 114 of the drum support plate 111.
2, exchanges heat with clothing, passes through the fan case 103 from the rear surface of the drum 102, and is heated to the fan 10.
4, the air is exhausted from the main body 101 of the device.

Then, as shown in FIG. 5, the above-mentioned motor 10
5 is two rubber washers 1 that serve both as insulation and fixing.
Motor holding fittings 119 and 120 made of iron plates bent into an L-shape are fixed with screws 121 via 18. The idler pulley 122 that keeps the tension of the V-belt 108 constant is the idler pulley shaft 1 formed from a spring steel rod bent into a U-shape.
A protrusion 124 inserted into one end of 25 to prevent it from coming off.
It is rotatably fixed by a retaining ring 123, and the other end of the idler pulley shaft 125 is bent into an L shape at an angle α. (See Figure 6).

A plurality of support portions f are provided near the corners of the bottom surface of the motor holder 120, and a bridge portion g and a cut-up portion h forming a hole into which the idler pulley shaft 125 can be inserted are provided approximately at the center of the bottom surface. , g, and h is set smaller than the angle α of the idler pulley shaft 125.

In the above configuration, the idler pulley shaft 12
5 is first inserted into the hole of the bridge part g, and is restricted from swinging in the x direction by the cut and raised part h, and is set on the support part f by changing the angle α to β. It is fixed without coming off. Therefore, the tension of the V-belt 108 is
This is caused by torsional elasticity that attempts to restore only the angle to the angle γ when it is set (see Fig. 7). Therefore,
The tension of the V-belt 108 is determined by the set angle γ and the length of the straight portion i.

Further, the vertical surfaces of the motor holding fittings 119 and 120 are provided with anti-rotation holes m and n corresponding to the unevenness of the motor rubber washer 118, and the motor 105 has motor holding fittings 119 and 1 whose bottom surfaces face each other.
20 is set in the axial direction via a rubber washer 118.

In the above configuration, the idler pulley shaft 1
By integrally forming the L-shaped attachment part A of 25 and the U-shaped idler pulley support part B (Fig. 6),
The idler pulley 123 can be easily set with fewer parts than before, and if the width of the motor 105 is increased by z by dividing the motor holding fitting into two, the mounting hole 1 of the motor holding fitting 119 can be
By providing a hole 127 of pitch W (=Z) in relation to 26, it becomes possible to attach large and small motors. In addition, the number of parts is smaller than before, and the strength of the motor support part is improved, resulting in higher drop strength.
Furthermore, by providing an idler pulley shaft 125 on the motor holding metal fitting 120, which is a fixed part,
Even if the width of the motor 105 changes, the motor holding bracket 1
Since the distance between the drum pulley 120 and the center of the idler pulley 122 is constant (=P), the mounting position of the drum pulley 122 can be kept constant, and the shaft shapes of large and small motors can be shared.

As described above, according to the present invention, it is possible to provide a clothes dryer that is excellent in terms of cost, assembly man-hours, strength, and quality.

[Brief explanation of the drawing]

Fig. 1 is a rear view showing a conventional example of idler pulley installation, Figs. 2 and 3 are side and perspective views showing motor holding and idler pulley installation, respectively, and Fig. 4 is an embodiment of the present invention. FIG. 5 is a perspective view showing the motor holding and idler pulley installation of the present invention, and FIGS.
The figures are a plan view and a perspective view showing the installation of the idler pulley. FIG. 8 is a schematic side view showing the motor holding and the installation of the idler pulley. 101...Equipment body, 102...Drum, 10
5...Motor, 119, 120...Motor holding fitting, 122...Idler pulley, 125...Idler pulley shaft, f...Support part, g...Bridge part, h...Cut and raised part.

Claims (1)

[Scope of utility model registration request] In clothes dryers that dry clothes by drawing hot air from outside the device and passing it through a heating element into a rotating drum, the arm that supports the idler pulley is formed in a U-shape. An L-shaped idler pulley shaft with one end fitted with an idler pulley and the other end fitted with spring elasticity to a plurality of idler pulley shaft holding parts provided on the bottom of one of a pair of L-shaped motor holding fittings. The torsional elasticity of the support part integrally formed with the shaped mounting part provides V-belt tension, and also corresponds to the unevenness of the motor supporting rubber washer which is held by the unevenness on the vertical surface of the pair of L-shaped holding fittings. A drum drive device for a clothes dryer, in which a motor rotation prevention hole is provided and the motor is set by pressing the motor in the axial direction via the rubber washer using the pair of L-shaped holding fittings whose bottom surfaces face each other.