JP4472076B2 - Anti-vibration device for washing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vibration isolator for a dehydrating washing machine that elastically supports an outer tub that receives water during dehydration.
[0002]
[Prior art]
Conventionally, this type of vibration isolator for a dehydrating washing machine is configured as shown in FIGS. Hereinafter, the configuration will be described.
[0003]
As shown in FIG. 6, the outer tub 1 is located outside the dehydrating and washing tub 2 and receives water during dehydration. A speed reducer 4 connected to the motor 3 by a belt is fixed to the lower portion of the outer tub 1, and the outer tub 1 is supported by vibration isolation from the four corners of the washing machine main body 5 via the hanging portions 6. .
[0004]
The suspension part 6 is configured as shown in FIG. 7, and the suspension bar 7 is provided from the washing machine body 5 via a support piece 1 a provided in the outer tub 1, and is supported by the bottom part of the suspension bar 7. A sliding member 8 is provided at the lower part of the piece 1a. Further, a spring support plate 9 is provided below the suspension rod 7, and a spring member 10 formed of a compression coil spring is provided between the spring support plate 9 and the sliding member 8.
[0005]
As shown in FIG. 8, the sliding member 8 is provided with a sliding contact surface 8 a that slides with the support piece 1 a, and includes a slit portion 11 that includes an insertion hole for the suspension rod 7 in a substantially vertical direction and divides the lower portion. The upper end portion of the slit portion 11 is positioned above the sliding contact surface 8a that slides on the support piece 1a.
[0006]
In the sliding member 8, the slit portion 11 bends inward by the initial tightening force by the spring member 10, the repulsive force against the compression of the spring member 10, and the load F from the support piece 1 a, and frictionally slides with the suspension rod 7. .
[0007]
Here, the slit portion 11 of the sliding member 8 has a relatively large upper end portion in order to obtain a large frictional resistance due to sufficient deflection and to reduce stress concentration at the upper end portion of the slit portion 11. It is located above the sliding contact surface 8a having low rigidity.
[0008]
With the above configuration, water supply, washing, drainage, and dehydration processes are automatically performed.
[0009]
[Problems to be solved by the invention]
However, in such a conventional configuration, when a load is applied to the sliding contact surface 8a of the sliding member 8 at the start and steady state of the dehydration process, a step is formed between the left and right sliding contact surfaces 8a across the slit portion 11. (Phase difference) occurs, and there is a problem that abnormal sound (rough sound) is generated.
[0010]
Further, due to this step (phase difference), uneven wear occurs on the sliding contact surface 8a of the sliding member 8, which not only lowers the durability but also has a problem of further accelerating abnormal noise.
[0011]
Further, due to the step (phase difference), the deflection of the slit portion 11 becomes irregular, the frictional sliding with the suspension rod 7 becomes unstable, and the vibration performance of the washing machine body 5 deteriorates. Was.
[0012]
The present invention solves the above-mentioned conventional problems, prevents a step from being generated on the left and right sliding surfaces across the slit portion of the sliding member, makes it difficult for abnormal noise and uneven wear to occur, An object of the present invention is to obtain a stable frictional resistance without causing irregular deflection of the slit portion.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the present invention elastically supports the outer tub located outside the washing and dewatering tub from the four corners of the washing machine body by the suspending means. The upper end of the bar is held at the top of the washing machine main body, a spring support plate is attached to the bottom of the hanging bar, a sliding member is inserted through the hanging bar and has a sliding contact surface with the outer tub, and the lower end is A spiral spring member is provided that is supported by the spring support plate and is supported so that the lower end of the sliding member is tightened at the upper end, and the sliding member includes an insertion hole through which the suspension rod is inserted. It has a slit portion that divides the lower part from the sliding contact surface with the outer tub in a substantially vertical direction, and is substantially convex outwardly between the support portion of the upper end portion of the spring member and the sliding contact surface with the outer tub. with arranging a plurality of radial ribs, an opening communicating with the insertion hole in a substantially horizontal direction, The lower end face of the number of ribs supporting the upper end of the spring member, the opening is obtained by a long shape in the vertical direction so as to straddle the support portion of the upper end portion of the spring member.
[0014]
As a result, there is no step on the left and right sliding surfaces across the slit part of the sliding member, so that abnormal noise and uneven wear are less likely to occur, and the slit part is irregularly bent by the step. And a stable frictional resistance can be obtained.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention comprises an outer tub located outside the washing and dewatering tub for receiving water during dehydration, and suspension means for elastically supporting the outer tub from the four corners of the washing machine body. The suspension means has a suspension bar that holds the upper end of the suspension machine at the top of the washing machine body, a spring support plate attached to the bottom of the suspension bar, and a sliding contact surface with the outer tub through the suspension bar. A sliding member, and a spiral spring member having a lower end portion supported by the spring support plate and an upper end portion enclosed and supported so as to clamp a lower portion of the sliding member. A slit portion that includes an insertion hole through which the suspension rod is inserted and that divides the lower portion below the sliding contact surface with the outer tub in a substantially vertical direction, and the sliding portion between the support portion of the upper end portion of the spring member and the outer tub. Between the contact surfaces, a plurality of outwardly convex substantially radial ribs are disposed. An opening communicating provided in the insertion hole in a substantially horizontal direction, the lower end surface of the plurality of ribs for supporting the upper end portion of said spring member, said opening so as to extend over the support portion of the upper end portion of the spring member The slit part is not located on the sliding contact surface with the outer tub of the sliding member, so that there is no step on the sliding contact surface. It can be made difficult to occur, and irregular deflection of the slit due to this step does not occur, and a stable frictional resistance can be obtained. Further, by providing the opening, the rigidity of the slit portion itself can be reduced, and the stress concentration at the upper end portion of the slit portion can be reduced. Further, by adjusting the opening area, the rigidity (spring constant) with respect to the deflection of the slit portion can be changed, the deflection amount of the slit portion can be adjusted, and an arbitrary frictional resistance can be obtained. Furthermore, by providing a plurality of ribs and openings, the temperature of the sliding member, which has risen due to frictional heat between the sliding member and the suspension rod, is dissipated from the plurality of ribs and openings, and the temperature of the friction sliding part increases. And the melting of the sliding member can be prevented. In addition, the sliding member itself is also less likely to reach a relatively high temperature, so that expansion and deformation due to heat can be prevented, and the temperature dependency of the frictional resistance can be reduced.
[0016]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0017]
Example 1
As shown in FIG. 2, the outer tub 12 is located outside the washing and dewatering tub 13 and receives water during dehydration. A speed reducer 15 connected to the motor 14 by a belt is fixed to the lower part of the outer tub 12. The outer tub 12 is supported in an anti-vibration manner from the four corners of the washing machine main body 16 via a suspending portion (suspending means) 17.
[0018]
The hanging part 17 has a configuration as shown in FIG. The suspension bar 18 is provided from the washing machine main body 16 via a support piece 12a provided in the outer tub 12, and the bottom of the suspension bar 18 has a support piece 12a and a sliding contact surface 19a below the support piece 12a. A member 19 is provided. The spring support plate 20 is provided at the bottom of the suspension rod 18, and a spiral spring member 21 is provided between the spring support plate 20 and the sliding member 19.
[0019]
As shown in FIG. 3, the sliding member 19 has a slit portion 22 that includes an insertion hole 19b of the suspension bar 18 in a substantially vertical direction and divides the lower portion, and the sliding contact surface 19a with the support piece 12a is a slit portion. It is located above the upper end of 22.
[0020]
The operation in the above configuration will be described. When the washing process is completed and the dehydrating process is started, a large vibration is generated in the washing / dehydrating tub 13 and the outer tub 12 due to imbalance due to the shift of the clothes that are the laundry. This vibration is maximized when passing through a resonance point of a vibrating body such as the outer tub 12, particularly at the time of activation.
[0021]
In order to suppress this vibration, the sliding member 19 is bent inward by the initial tightening force by the spring member 21 and the repulsive force against the compression of the spring member 21 due to the load from the outer tub 12. Friction sliding by friction sliding.
[0022]
Here, since the slit portion 22 is not located on the sliding contact surface 19a of the sliding member 19 with the outer tub 12, there is no left and right step (phase difference) on the sliding contact surface 19a, and abnormal noise and uneven wear occur. Less likely to occur. Moreover, a stable frictional resistance can be obtained without causing irregular deflection of the slit portion 22 due to the step (phase difference).
[0023]
(Example 2)
As shown in FIG. 4, the sliding member 23 has a slit portion 24 that includes the insertion hole 23b of the suspension rod 18 in a substantially vertical direction and divides the lower portion, and the sliding contact surface 23a with the support piece 12a is the slit portion. It is located above the upper end of 24. Moreover, the opening part 25 connected to the insertion hole 23b is provided in the substantially horizontal direction. Other configurations are the same as those of the first embodiment.
[0024]
The operation in the above configuration will be described. The sliding member 23 is deflected inward by the initial tightening force by the spring member 21 and the repulsive force against the compression of the spring member 21 due to the load from the outer tub 12, and frictionally slides with the suspension rod 18 to cause vibration. Attenuate.
[0025]
Here, by providing the opening 25 that communicates with the insertion hole 23b in a substantially horizontal direction, the frictional sliding area between the sliding member 23 and the suspension rod 18 becomes constant, and the frictional resistance is further stabilized. Moreover, by providing the opening 25, the rigidity of the slit 24 itself can be reduced, and the stress concentration at the upper end of the slit 24 can be reduced.
[0026]
Further, by adjusting the opening area of the opening 25, the rigidity (spring constant) with respect to the bending of the slit 24 can be changed, the amount of bending of the slit 24 can be adjusted, and an arbitrary frictional resistance can be obtained.
[0027]
Furthermore, by providing the opening 25, the frictional heat can be radiated from the opening 25, the temperature rise of the friction sliding portion can be suppressed, and the melting of the sliding member 23 can be prevented.
[0028]
(Example 3)
As shown in FIG. 5, the sliding member 26 has a slit portion 27 that includes the insertion hole 26b of the suspension rod 18 in a substantially vertical direction and divides the lower portion, and the sliding contact surface 26a with the support piece 12a is the slit portion. 27 is located above the upper end of 27. The sliding member 26 has a plurality of substantially radial ribs 28 disposed between the lower portion thereof and the inside of the sliding contact surface 26 a between the outer tub 12. Other configurations are the same as those of the first embodiment.
[0029]
The operation in the above configuration will be described. The sliding member 26 bends inward by the initial tightening force by the spring member 21 and the repulsive force against the compression of the spring member 21 due to the load from the outer tub 12, and frictionally slides with the suspension rod 18 to cause vibration. Attenuate.
[0030]
Here, the radial ribs 28 can efficiently dissipate the temperature of the sliding member 26 raised by the frictional heat between the sliding member 26 and the suspension rod 18 and prevent the frictional sliding portion of the sliding member 26 from melting. can do. Further, the sliding member 26 itself is also less likely to reach a relatively high temperature, so that expansion and deformation due to heat can be prevented, and the temperature dependency of the frictional resistance can be reduced.
[0031]
【The invention's effect】
As described above, according to the first aspect of the present invention, the outer tub is located outside the washing and dewatering tub and receives water during dehydration, and the outer tub is elastically supported from the four corners of the washing machine body. The suspension means includes a suspension bar that holds the upper end of the suspension machine at the top of the washing machine body, a spring support plate that is attached to the bottom of the suspension bar, and an outer tub that is inserted through the suspension bar. A sliding member having a slidable contact surface, and a spiral spring member that is supported by the lower end portion thereof supported by the spring support plate and the upper end portion thereof being contained so as to clamp the lower portion of the sliding member. The sliding member includes an insertion hole through which the suspension rod is inserted, and has a slit portion that divides the lower portion below the sliding contact surface with the outer tub in a substantially vertical direction, and a support portion of the upper end portion of the spring member; Between the sliding contact surface with the outer tub, a plurality of substantially radial ribs projecting outward As well as arranged, the opening communicating with the insertion hole in a substantially horizontal direction is provided, the lower end surface of the plurality of ribs for supporting the upper end of the spring member, the opening of the upper end portion of the spring member Since it has a shape that is long in the vertical direction so as to straddle the support part, since the slit part is not located on the sliding contact surface with the outer tub of the sliding member, it is possible to prevent a step (phase difference) from occurring on the sliding contact surface, Abnormal noise and uneven wear can be made difficult to occur, and irregular deflection of the slit portion due to this step (phase difference) does not occur, and a stable frictional resistance can be obtained. Further, by providing the opening, the rigidity of the slit portion itself can be reduced, and the stress concentration at the upper end portion of the slit portion can be reduced. Further, by adjusting the opening area, the rigidity (spring constant) with respect to the deflection of the slit portion can be changed, the deflection amount of the slit portion can be adjusted, and an arbitrary frictional resistance can be obtained. Furthermore, by providing a plurality of ribs and openings, the temperature of the sliding member, which has risen due to frictional heat between the sliding member and the suspension rod, is dissipated from the plurality of ribs and openings, and the temperature of the friction sliding part increases. And the melting of the sliding member can be prevented. In addition, the sliding member itself is also less likely to reach a relatively high temperature, so that expansion and deformation due to heat can be prevented, and the temperature dependency of the frictional resistance can be reduced.
[Brief description of the drawings]
FIG. 1 is a partially cutaway cross-sectional view of a vibration isolator for a dehydrating washing machine according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of a washing machine provided with the vibration isolating device for the dehydrating combined washing machine. [FIG. 3] (a) Side view of the sliding member of the vibration isolator of the dehydrating and washing machine (b) Bottom view of the sliding member of the vibration isolating device of the dehydrating and washing machine [FIG. 4] (a) The present invention (B) Bottom view of the sliding member of the vibration isolator of the dehydrating and washing machine [FIG. 5] (a) The present invention Side view of sliding member of vibration isolator of dehydrating and washing machine of third embodiment (b) Bottom view of sliding member of vibration isolating device of dehydrating and washing machine [FIG. 6] Conventional dehydrating and washing Sectional view of washing machine equipped with vibration isolator of machine [FIG. 7] Cross-sectional view of a part of vibration isolator of washing machine for the same dehydration [FIG. 8] Sliding member of vibration isolator of washing machine for the same dehydration Side of DESCRIPTION OF SYMBOLS
12 Outer tub 13 Washing / dehydration tub 16 Washing machine body 17 Suspension part (suspending means)
18 Suspension rod 19 Sliding member 19a Sliding contact surface 19b Insertion hole 20 Spring support plate 21 Spring member 22 Slit

Claims (1)

An outer tub located outside the washing and dewatering tub for receiving water at the time of dehydration, and a suspension means for elastically supporting the outer tub from the four corners of the washing machine main body. A suspension rod held at the top of the machine main body, a spring support plate attached to the bottom of the suspension rod, a sliding member that is inserted through the suspension rod and has a sliding contact surface with the outer tub, and a lower end portion of the spring support plate And a spiral spring member whose upper end is enclosed and supported so as to clamp the lower part of the sliding member, and the sliding member includes an insertion hole through which the suspension rod is inserted. It has a slit part that divides the lower part from the sliding contact surface with the outer tub in the vertical direction, and protrudes outward between the support portion of the upper end portion of the spring member and the sliding contact surface with the outer tub. A plurality of substantially radial ribs are disposed and communicated with the insertion hole in a substantially horizontal direction. An opening is provided, the lower end surface of the plurality of ribs for supporting the upper end portion of said spring member, said opening dewatering combined with a long shape in the vertical direction so as to straddle the support portion of the upper end portion of the spring member Anti-vibration device for washing machines.

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