JPH0527168Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) The present invention relates to a motor mounting device for a washing machine that improves vibration absorption of the motor.

(Prior Art) As shown in FIG. 4, for example, in the conventional motor mounting structure of a washing machine, a motor bracket 4 is attached to a mounting boss 2 fixed to a support base 1 via a cylindrical buffer member 3. The mounting hole 5 is fitted, a washer 6 is placed on the upper end of the buffer member 3, and the washer 6 is tightened and fixed with a screw 7, so that the vibration of the motor is absorbed by the buffering action of the buffer member 3.

(Problem to be solved by the invention) By the way, the vibration absorption effect (buffering effect) by the buffer member 3 is obtained by elastic deformation of the buffer member 3, but in the above conventional configuration, the entire inner circumferential surface of the buffer member 3 Since it is in close contact with the outer circumferential surface of the mounting boss 2, the vibration absorbing effect can only be obtained by the expansion and contraction of the thickness of the buffer member 3. Therefore, when the tension of the belt hung on the motor pulley acts on one side of the buffer member 3, the wall thickness of that part is constantly compressed, absorbing vibrations in the tension direction (lateral direction). The effect was significantly weakened, and the anti-vibration effect was insufficient. Moreover,
In the conventional configuration described above, elastic deformation of the buffer member 3 in the vertical direction also tends to be hindered by the frictional force between it and the mounting boss 2, and the vibration absorption effect in the vertical direction cannot be said to be sufficient.

The present invention has been made to solve these problems, and therefore, its purpose is to provide a washing machine motor mounting device that can improve vibration absorption performance.

[Structure of the invention] (Means for solving the problem) The motor mounting device of the invention includes a mounting boss fixed to a support base, a cylindrical buffer member fitted to the mounting boss, and a washing machine. and a mounting hole formed in the bracket of the motor and fitted into the buffer member, wherein the buffer member is formed into a double cylindrical shape with both inner and outer circumferential walls and their upper ends integrated with a ceiling wall. Both the upper and lower ends of the inner and outer peripheral walls are fixed to the mounting boss so as to sandwich them, and a gap is provided on the outer periphery to allow inward deflection of the portion of the outer peripheral wall of the buffer member that is fitted into the mounting hole. It is characterized by being formed inside the wall.

(Function) Since the buffer member is formed into a double cylindrical shape and a gap is formed inside the outer circumferential wall, the outer circumferential wall can freely flex and deform inward by the amount of the gap, and This increases the lateral vibration absorption effect. In addition, regarding vibrations in the vertical direction, the outer circumferential wall of the buffer member can be elastically deformed relatively freely in the vertical direction without interfering with the mounting boss in the area where the gap exists, and has the effect of absorbing vibrations in the vertical direction. can also be enhanced.

(Example) Hereinafter, a first example of the present invention will be described based on FIGS. 1 and 2. First, in FIG. 2 showing a schematic configuration of a washing machine, 11 is an outer box of the washing machine, and a washing tub 12 is disposed inside the outer box. A container-shaped stirring body 13 located at the inner bottom of this washing tub 12
is a speed reduction mechanism 1 fixed to the outer bottom of the washing tub 12.
4 output shaft 14a. Reference numeral 15 denotes a motor attached to the bottom of the outer box 11 as described later, and a pulley 16 fitted to the rotating shaft 15a.
A belt 18 is stretched between the input shaft 14b of the speed reduction mechanism 14 and a pulley 17 fitted thereto.

Next, the mounting device 19 for the motor 15 will be explained.
The support base 20 of the motor 15 is formed integrally with the bottom plate 21 of the outer case 11 in a raised manner. An insertion tube portion 22 (see FIG. 1) is formed in the center of the support base 20. As shown in FIG. The insertion tube portion 22 is formed into a rectangular tube shape with an opening extending in the tension direction of the belt 18 of the motor 15. An uneven locking portion 23 for adjusting the mounting position of the motor 15 is formed on the upper surface of the support base 20 near the insertion tube portion 22 . On the other hand, 24
is a mounting boss, and a female threaded portion 26 is formed at the center of a cylindrical mounting portion 25 formed in the upper half thereof. A flange 27 and a pair of elastic engagement pieces 28 (only one shown) extending downward from the flange 27 are integrally formed at the lower part of the mounting portion 25, and the elastic engagement pieces 28 are connected to the insertion tube. The claw portion 28a of the elastic engagement piece 28 is inserted into the portion 22 from above, and the claw portion 28a of the elastic engagement piece 28 is engaged with the lower edge portion of the insertion tube portion 22. In this engaged state, the flange 27 comes into contact with the upper edge of the insertion cylinder 22, and the uneven part 29 formed on the lower surface of the flange 27 is locked to the locking part 23, and in this state The mounting boss 24 is configured to be fixed to the support base 20. Reference numeral 30 denotes a buffer member made of rubber, for example, in the shape of a double cylinder, and has both inner and outer circumferential walls 31,
The upper ends of 32 are integrated with each other by a ceiling wall 33, thereby forming a gap 34 between both the inner and outer circumferential walls 31, 32. And the outer peripheral wall 3
The outer peripheral upper half 32a of the motor 15 is formed into a tapered shape in order to easily fit into the mounting hole 36 formed in the bracket 35 of the motor 15.
The mounting hole 36 is fitted into a fitting groove 37 formed at the lower part of the portion a. The portion into which the mounting hole 36 is fitted is allowed to be deflected inward by the gap 34 existing inside the portion. On the other hand, the inner diameter dimension of the inner peripheral wall 31 is
The inner circumferential wall 31 is fitted into the attaching portion 25 in a substantially tight state, thereby preventing the inner circumferential wall 31 from moving in the lateral direction. regulated. Further, the lower ends of both the inner and outer circumferential walls 31, 32 are fitted into annular fitting grooves 38, 39 formed on the upper surface of the mounting boss 24 (the fitting groove 39 on the outer circumferential side is open on the left side in the figure). In this state, by applying the washer 40 to the ceiling wall 33 and tightening the screw 41 to the female threaded portion 26, the upper and lower ends of both the inner and outer peripheral walls 31, 32 are sandwiched between the washer 40 and the collar portion 27. It is fixed. Mounting device 19 configured as above
are provided, for example, at three locations around the motor 15, thereby attaching the motor 15 to the support base 20.

According to the above configuration, the outer peripheral wall 32 of the buffer member 30
Since a gap 34 is formed inside the portion where the mounting hole 36 of the bracket 35 is fitted, the wall thickness of the outer circumferential wall 32 of the buffer member 30 can withstand vibrations in the lateral direction of the motor 15. In addition to the expansion and contraction of the outer circumferential wall 32, the outer peripheral wall 32 also absorbs vibrations by bending and deforming inward, thereby improving the vibration absorption performance in the lateral direction. In addition, regarding vibrations in the vertical direction, the outer peripheral wall 32 of the buffer member 30 can be elastically deformed relatively freely in the vertical direction without interfering with the mounting boss 24 in the portion where the gap 34 exists, It is also possible to improve the vibration absorption performance of

Moreover, the buffer member 30 has both inner and outer circumferential walls 31 and 32.
Since it has a structure in which the walls are integrated with the ceiling wall 33, compared to the conventional single wall structure shown in Fig. 4,
The overall strength is increased, and the shock absorber 3 during assembly
0 can be prevented from unintentionally collapsing, the mounting portion 25 and the mounting hole 36 can be easily fitted into the buffer member 30, and the ease of assembly can be improved.

Further, the buffer member 30 of the above embodiment has an inner circumferential wall 3
1 has the same height dimension as the outer peripheral wall 32,
Since the outer circumferential wall 32 comes into contact with the inner circumferential wall 31 when the amount of deflection deformation of the outer circumferential wall 32 reaches the maximum (corresponding to the thickness of the gap 34), the outer circumferential wall 3
2 comes into contact with the inner circumferential wall 31, a buffering effect can be expected due to expansion and contraction of the thickness of the inner circumferential wall 31, and large vibrations can be effectively absorbed.

On the other hand, FIG. 3 shows a second embodiment of the present invention, and the main difference from the first embodiment is that the mounting portion 25 of the mounting boss 24 has three steps 25a, 25.
b and 25c, and the inner circumferential wall 31 of the buffer member 30 is set to approximately 1/3 the height of the outer circumferential wall 32.
Then, the inner peripheral wall 31 of the buffer member 30 is attached to the mounting portion 25.
while fitting into the upper step part 25a of the outer peripheral wall 3.
2 into the lower step part 25c, and in this state, apply the washer 40 from above and tighten the screw 41, thereby pressing the lower ends of both the inner and outer circumferential walls 31, 32 against the mounting boss 24. Fixed. In this case, the portion of the outer peripheral wall 32 of the buffer member 30 into which the mounting hole 36 is fitted faces the middle step portion 25b of the mounting portion 25, and a gap 42 is formed between the two. This gap 42 allows the outer peripheral wall 32 to be deflected inward.

In the second embodiment as well, the outer circumferential wall 32 of the buffer member 30 can freely bend and deform inward due to the gap 42 existing inside the outer circumferential wall 32, so that the vibration absorption performance can be improved compared to the conventional one. The double tube structure increases the overall strength of the buffer member 30 and improves ease of assembly.

In the above embodiment, the rotational force of the motor 15 is transmitted to the agitator 13 via the belt 18, but the present invention can also be applied to a washing machine in which the motor is disposed directly below the agitator and the rotational force of the motor is transmitted by a power transmission mechanism such as a universal joint.

In addition, the present invention can be modified in various ways, such as a configuration in which the mounting boss is screwed to the support base.

[Effects of the invention] As is clear from the above explanation, the present invention has a double-tube structure for the buffer member, and a gap is formed inside the part of the outer peripheral wall where the bracket mounting hole is fitted. This allows for inward deflection of the outer circumferential wall, improving vibration absorption performance, and also has the excellent effect of improving ease of assembly by increasing the strength of the shock absorbing member as a whole due to the double tube structure. .

[Brief explanation of the drawing]

Figures 1 and 2 show the first embodiment of the present invention; Figure 1 is an enlarged vertical cross-sectional view of the main parts, Figure 2 is a vertical cross-sectional view of the washing machine, and Figure 3 is a cross-sectional view of the washing machine. FIG. 4 is a diagram equivalent to FIG. 1 showing a second embodiment of the present invention, and FIG. 4 is a diagram equivalent to FIG. 1 showing a conventional example. In the drawing, 13 is a stirring body, 14 is a speed reduction mechanism, 15
is the motor, 18 is the belt, 19 is the mounting device, 20
22 is a support base, 22 is an insertion cylinder part, 24 is a mounting boss, 25 is a mounting part, 28 is an elastic engagement piece, 30 is a buffer member, 31 is an inner peripheral wall, 32 is an outer peripheral wall, 33 is a ceiling wall, and 34 is a gap , 35 is a bracket, 36 is a mounting hole, 40 is a washer, and 42 is a gap.

Claims (1)

[Scope of utility model registration request] A mounting boss fixed to a support base, a cylindrical buffer member fitted to the mounting boss, and a mounting hole formed in a bracket of a washing machine motor and fitted to the buffer member. , the buffer member is formed into a double cylindrical shape with both inner and outer circumferential walls and their upper ends integrated with a ceiling wall, and is fixed to the mounting boss so as to sandwich the upper and lower ends of the inner and outer circumferential walls; A motor mounting device for a washing machine, characterized in that a gap is formed inside the outer peripheral wall to allow inward deflection of a portion of the outer peripheral wall that is fitted into the mounting hole.