WO2017114037A1

WO2017114037A1 - Washing machine variable damping shock absorbing device and washing machine

Info

Publication number: WO2017114037A1
Application number: PCT/CN2016/107062
Authority: WO
Inventors: 吕佩师; 杨林; 张刚金; 田云; 周春霞
Original assignee: 合肥海尔洗衣机有限公司
Priority date: 2015-12-30
Filing date: 2016-11-24
Publication date: 2017-07-06
Also published as: JP2019505740A; CN106930047A; JP6827049B2

Abstract

Disclosed is a variable damping shock absorbing device of a washing machine and a washing machine. The variable damping shock absorbing device comprises a boom (1), a sleeve (3), and an upper spring seat (2), a damping spring (4) and a lower spring seat (5) provided in the sleeve (3). The upper end of the sleeve (3) is provided with a bracket (6) and its lower end is provided with a bottom cover (7). The boom (1) passes through the bracket (6), the upper spring seat (2) and the damping spring (4) to be connected with the lower spring seat (5). A damping sleeve (8) is arranged between the bracket (6) and the upper spring seat (2). The boom (1) passes through the damping sleeve (8), which provides a variable damping force to the boom (1). The bracket (6) and the upper spring seat (2) squeeze the damping sleeve (8) therebetween, the damping sleeve (8) is deformed and squeezed inwardly, and the friction between the damping sleeve (8) and the boom (1) is increased. When the washing machine begins dewatering, the bias load is too large, an outer barrel exerts an eccentric force on the sleeve (3) and the damping sleeve (8), which is radially deformed to squeeze the boom (1), and the damping force becomes larger; as the dewatering process continues running, the bias load becomes smaller, the eccentric force exerted by the outer barrel to the sleeve (3) and the damping sleeve (8) is released, the damping sleeve (8) recovers and the damping force becomes smaller. The shock absorption performance is improved, the vibration and moving distance of the washing machine is decreased, and noise is reduced.

Description

Washing machine variable damping vibration damping device and washing machine

Technical field

The invention relates to the technical field of washing machines, in particular to a washing machine damping device, in particular to a washing machine variable damping vibration damping device and a washing machine using the same.

Background technique

The existing washing machine is divided into a pulsator washing machine and a drum washing machine, wherein the structure of the pulsator type washing machine comprises: a casing forming an appearance of the washing machine; and an inside of the casing is provided with a suspension member fixed by a supporting member and used for accommodating washing water a barrel; an inner barrel rotatably mounted inside the outer tub and provided with a stirrer at the bottom thereof; a drive motor mounted on the lower side of the outer tub and used to generate a driving force of the agitator and the inner tub; driving force for driving the motor A power transmission device selectively provided to the agitator and the inner tub; a drain device installed at a lower portion of the outer tub and for discharging the washing water contained in the outer tub to the outside, and the outer tub is suspended from the housing by the boom device.

At present, the boom device comprises a boom, a boom seat, a ball seat, a spring and a spring seat. The boom seat is arranged at the top of the boom, and the spring seat, the spring and the ball seat are sequentially run upward from the bottom end of the boom to the boom. The ball seat is provided with a friction plate; the washing machine housing is provided with a spherical groove, the convex spherical surface of the hanging rod seat is matched with the spherical groove on the casing; the bottom end of the outer barrel also has a spherical groove, and the spherical seat is convex The spherical surface cooperates with a spherical recess at the bottom end of the outer tub to suspend the inner and outer tubs from the washing machine housing.

When the washing machine is working, the vibration generated by the outer tub causes the ball seat to move up and down. The ball seat further generates a damping force by reciprocating friction between the spring and the friction plate and the lifting rod, thereby suppressing the vibration and achieving the purpose of improving the vibration noise level of the whole machine.

However, when the spring is completely compressed, the vibration damping effect is lost. Therefore, when the washing machine is washed and dehydrated, the boom does not play a good role in damping, resulting in large vibration of the washing machine and large moving distance. During the dehydration transient phase, the internal system vibrates greatly, requiring the boom device to provide a relatively large damping force to suppress internal system vibration; in the steady state of dehydration, the internal system vibration is small, then the boom device is required to provide relatively small Damping force to isolate vibration; and the above-mentioned boom device can only provide a single damping force through the friction plate, and when the boom device is assembled, the ball seat surface will be coated with grease to improve the lubrication condition; therefore, the internal system vibrates a large dehydration instant. In the state stage, the damping force of the boom device is often difficult to suppress the vibration during system operation; in the steady state of dehydration in which the internal system vibration is small, under the action of the viscous action of the grease and the damping force of the boom, the boom device is caused up and down. Inciting, abnormal vibration noise problems occur.

In view of this, the present invention has been made.

Summary of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a variable damping vibration damping device for a washing machine, which can smoothly change the elastic coefficient of the suspension rod vibration, improve the vibration damping performance, and reduce the vibration and moving distance of the washing machine. And can reduce noise.

Another object of the present invention is to provide a washing machine having the variable damping vibration damping device.

In order to solve the above technical problems, the basic idea of adopting the technical solution of the present invention is:

A variable damping and damping device for a washing machine comprises a boom, a sleeve and an upper spring seat, a damping spring and a lower spring seat disposed in the sleeve, the upper end of the sleeve has a bracket, the boom passes through the bracket, and the upper spring seat The damping spring is connected with the lower spring seat, and a damping sleeve is arranged between the bracket and the upper spring seat, and the lifting rod passes through the damping sleeve, and the damping sleeve provides a variable damping force to the lifting rod. Further, the bracket and the upper spring seat press the middle damping sleeve, the damping sleeve is deformed, and is pressed inward, and the friction between the damping sleeve and the suspension rod is increased.

Further, the damping sleeve is provided with a variable damping structure, the variable damping structure is subjected to force, the damping sleeve is radially deformed, the inner diameter is reduced, and the damping force is increased.

Further, the variable damping structure includes a first variable damping structure and/or a second variable damping structure. The first variable damping structure is disposed on an end surface of the damping sleeve support bracket, and the downward pressure of the bracket is converted into a damping sleeve. The radial deformation pressure, the inner diameter is reduced, the boom damping force is increased, the second variable damping structure is disposed on the contact surface of the damping sleeve and the upper spring seat, and the supporting force of the upper spring seat is converted into the radial pressing force of the damping sleeve The inner diameter is reduced and the damping force of the boom is increased.

In a further aspect, the damping sleeve includes a tray supporting the bracket, a support sleeve disposed under the tray and extending into the upper spring seat, and a hanger mounting hole extending through the tray and the support sleeve, the tray and/or The support sleeve is provided with a variable damping structure which makes the inner diameter of the damping sleeve smaller when the force is applied. The damping sleeve has a T-shaped structure and is a damping rubber sleeve.

Further, the upper surface of the tray is provided with at least one annular protrusion along the outer circumference of the hanger mounting hole, the annular protrusion is gradually lowered from the inside to the outside, and the surface has a curved surface structure, and the lower part of the bracket is provided with an annular protrusion. The matching concave pressing surface is a variable damping structure on the tray. Preferably, the upper surface of the tray is provided with two annular protrusions of the same center.

Further, the peripheral wall of the support sleeve is provided with at least one compression rib, and the height of the compression rib protruding from the surface of the support sleeve is gradually increased from the bottom to the top in the axial direction of the support sleeve, and the compression rib is a change on the support sleeve. The damping structure, preferably, has 3-8 compression ribs and is evenly distributed in the circumferential direction. The upwardly extending end of the compression rib is smoothly transitioned to the lower surface of the tray.

Further, at least one damping rib is disposed on the inner wall of the hanger mounting hole in the axial direction. Preferably, the damping ribs are 2-6, and are evenly distributed in the circumferential direction.

Further, the upper part of the upper spring seat is provided with a mounting groove, and the lower part is provided with a mounting post for locating the vibration-damping spring, the hanging rod penetrates the mounting column from the mounting groove, and a gap is formed between the hanging rod and the inner wall of the mounting groove, and the composition is formed. And a variable damping structure on the support sleeve is pressed into contact with the opening of the mounting groove. Preferably, the mounting post is formed to extend downward from the mounting groove.

Further, the lower spring seat comprises a vibration-damping spring support, an oil-containing felt, a sliding cup and a lower support pad, wherein the upper end of the vibration-damping spring is supported and connected with the upper spring seat, and the lower end is supported above the vibration-damping spring support, and the oil-containing felt and sliding The cup and the lower support pad are sequentially disposed under the vibration-damping spring holder.

The washing machine with the above variable damping vibration damping device has the upper support supporting the outer bucket hanger seat. When the washing machine starts the dehydration operation, the partial load is too large, and the outer barrel applies an eccentric force to the casing, the damping sleeve, and the damping sleeve is radially deformed. When the boom is squeezed, the damping force becomes larger; the dehydration continues to operate, the eccentric load becomes smaller, the eccentric force of the outer tub to the casing and the damper sleeve is released, the damping sleeve is restored, and the damping force is reduced.

Further, the greater the eccentric force, the greater the damping force of the damper sleeve on the boom, and the smaller the eccentric force, the smaller the damping force of the damper sleeve on the boom.

Further, the total weight of the outer tub also applies pressure to the damper sleeve. When the dehydration operation is started, the pressure applied to the damper sleeve is the largest, and the damping force is maximum. During the dehydration process, as the water in the clothes is scooped out, the damper sleeve is applied. The pressure becomes smaller and the damping force becomes smaller.

After adopting the above technical solution, the present invention has the following advantageous effects compared with the prior art.

According to the variable damping damper of the present invention, it is possible to compensate for the problem that the conventional damper spring is decompressed at the time of dehydration start, and the load is unevenly pressed and the noise is large.

The washing machine of the invention simultaneously realizes the dual functions of transient dehydration suppression vibration and steady-state dehydration isolation vibration, thereby effectively improving the vibration noise level in the dehydration stage, and effectively avoiding the problem that the vibration damping device is up and down.

The variable damping vibration damping device of the washing machine of the invention realizes the change of the elastic coefficient in the washing and dehydrating stages, improves the vibration damping performance, reduces the vibration and moving distance of the washing machine and reduces the noise, and improves the damping performance of the general vibration damping component. More than %, generally applicable to the pulsator washing machine, which improves the vibration damping performance and has a better effect on the dehydration stability of the washing machine.

DRAWINGS

1 is a schematic structural view of a variable damping device of a washing machine of the present invention;

2 is a schematic cross-sectional structural view of a variable damping vibration damping device of the washing machine of the present invention;

3 is a schematic view showing the assembly structure of the variable damping device of the washing machine of the present invention;

4 and FIG. 5 are schematic structural views of the damping sleeve of the present invention at different viewing angles;

Fig. 6 is an enlarged schematic view showing a portion A in Fig. 2;

detailed description

The specific embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

As shown in FIG. 1 to FIG. 3, the variable damping device of the washing machine of the present invention comprises a boom 1, a sleeve 3, and an upper spring seat 2, a damping spring 4 and a lower spring seat disposed in the sleeve 3. 5, the upper end of the sleeve 3 has a bracket 6, the bottom end is equipped with a bottom cover 7, the boom is passed through the bracket 6, the upper spring seat 2, the damping spring 4 is connected with the lower spring seat 5, and the lower spring seat 5 includes a damping spring The support 51, the oil-containing felt 52, the sliding cup 53 and the lower support pad 54, the upper end of the damping spring 4 is supported and connected to the upper spring seat 2, the lower end is supported above the damping spring holder 51, the oil-containing felt 52, the sliding cup 53 and the lower The support pads 54 are sequentially disposed below the damper spring holder 51. A damping sleeve 8 is disposed between the bracket 6 and the upper spring seat 2, and the boom 1 passes through the damping sleeve 8. The damping sleeve 8 provides a variable damping force to the boom 1, and an external force is applied to the outer tub of the washing machine. The frame 6 and the upper spring seat 2 press the damper sleeve 8 in the middle, the damper sleeve 8 is deformed, and the boom 1 is pressed inward, and the friction between the damper sleeve 8 and the boom 1 is increased, so that the damping force changes.

Further, the damping sleeve 8 is provided with a variable damping structure, and the variable damping structure is subjected to force, the damping sleeve 8 is deformed radially, the inner diameter is reduced, and the lifting rod 1 is squeezed, and the damping force is increased.

As shown in FIG. 4 and FIG. 5, the variable damping structure includes a first variable damping structure 9 and/or a second variable damping structure 10, and the first variable damping structure 9 is disposed on the end surface of the support bracket 6 of the damping sleeve 8, the bracket 6 The downward pressure is converted into the pressure of the radial deformation of the damping sleeve 8, the inner diameter is reduced, the damping force of the boom 1 is increased, and the second variable damping structure 10 is disposed on the contact surface of the damping sleeve 8 and the upper spring seat 2, the upper spring The supporting force of the seat 2 is converted into the radial pressing force of the damping sleeve 8, the inner diameter is reduced, and the damping force of the boom 1 is increased.

Specifically, the damper sleeve 8 includes a tray 81 supporting the bracket 6, a support sleeve 82 disposed under the tray 81 and extending into the upper spring seat 2, and a suspension rod axially extending through the tray 81 and the support sleeve 82. The mounting hole 83, the tray 81 and/or the support sleeve 82 are provided with a variable damping structure which is subjected to a force to make the inner diameter of the hanger mounting hole 83 small. The damping sleeve 8 is a damping rubber sleeve and has a T-shaped integral structure as a whole.

Embodiment 1

As shown in FIG. 4, the upper surface of the tray 81 of the present embodiment is provided with an annular protrusion 84 along the outer circumference of the hanger mounting hole 83. The annular protrusion 84 is gradually lowered from the inside to the outside, and the surface is curved, and the whole is centered. Through the ball-shaped structure, the hanger mounting hole 83 penetrates the center, and the contact surface of the lower portion of the bracket 6 with the upper surface of the tray 81 is a concave pressing surface matching the annular projection 84 (refer to FIG. 6), the ring The protrusion 84 is the first variable damping structure 9 on the tray 81.

Further, the first variable damping structure 9 is an annular protrusion 84 provided on the inner and outer surfaces of the upper surface of the tray 81.

Embodiment 2

As shown in FIG. 5, the peripheral wall of the support sleeve 82 of the embodiment is provided with at least one compression rib 85. The height of the compression rib 85 protruding from the surface of the support sleeve 82 is gradually increased from the bottom to the top in the axial direction of the support sleeve 82. The compression rib 85 is a second variable damping structure 10 on the support sleeve 82. One end of the compression rib 85 extending upward is smoothly connected to the lower surface of the tray 81.

Preferably, the compression ribs 85 are 4-6, and are evenly distributed along the circumferential direction of the support sleeve 82.

Embodiment 3

The difference between this embodiment and the second embodiment is that the outer diameter of the support sleeve gradually increases from the bottom to the top, and the upper end of the support sleeve and the lower surface of the tray smoothly transition (not shown).

Embodiment 4

As shown in FIG. 4 and FIG. 5, at least one damping rib 86 is disposed on the inner wall of the boom mounting hole 83 in the axial direction. Preferably, the damping rib 86 is 2-6, along the circumference. The direction is evenly distributed.

Embodiment 5

As shown in FIG. 3 and FIG. 6 , the upper portion of the upper spring seat 2 of the present embodiment is provided with an opening-up mounting groove 21 , and the lower portion is provided with a mounting post 22 for positioning the damper spring 4 , and the boom 1 is installed from the mounting groove 21 . Through the mounting post 22, there is a gap between the boom 1 and the inner wall of the mounting groove 21 to form a receiving portion 23 for receiving the supporting sleeve 82. The compression rib 85 on the supporting sleeve 82 is pressed into contact with the opening of the mounting groove 21 due to The compression rib 85 is gradually raised from the bottom to the top, and the supporting force of the upper spring seat 2 to the compression rib 85 on the support sleeve 82 is converted into the pressing force of the boom 1 inwardly, thereby providing the variable damping force of the boom 1.

Preferably, the mounting post 22 is formed by the mounting slot 21 extending downward.

Embodiment 6

The present invention is a washing machine having the variable damping vibration damping device according to the above embodiment, and the upper support supports the outer drum hanger seat. The structure is known to those skilled in the art, and will not be further described herein. Since the eccentric load is too large when the washing machine starts the dewatering operation, the outer tub applies an eccentric force to the sleeve 3 and the damper sleeve 8 of the variable damping damper device of the present invention, and the damper sleeve 8 is axially compressed and deformed radially. When the boom 1 is squeezed, the damping force becomes larger; the dehydration continues to operate, the eccentric load becomes smaller, and the variable damping damper device releases the eccentric force of the outer tub to the sleeve 3 and the damper sleeve 8, and the damper sleeve 8 recovers, and the damping force becomes small.

Further, the greater the eccentric force, the greater the damping force of the damper sleeve 8 on the boom 1, and the smaller the eccentric force, the smaller the damping force of the damper sleeve 8 on the boom 1.

Further, the total weight of the outer tub also applies pressure to the damper sleeve 8. When the dehydration operation is started, the pressure applied to the damper sleeve 8 is maximum, and the damping force is maximum. During the dehydration process, the water in the laundry is thrown out and applied to the damper. The pressure of the sleeve 8 becomes smaller, and the damping force becomes smaller.

The damper spring 4 according to the present invention is not limited to a single spring, and may be a spring group composed of a combination of at least two springs.

The embodiments of the present invention may be further combined or substituted, and the embodiments are merely described for the preferred embodiments of the present invention, and are not intended to limit the scope and scope of the present invention. Various changes and modifications made by those skilled in the art to the technical solutions of the present invention are within the scope of the present invention.

Claims

A variable damping and damping device for a washing machine comprises a boom, a sleeve and an upper spring seat, a damping spring and a lower spring seat disposed in the sleeve, the upper end of the sleeve has a bracket, the boom passes through the bracket, and the upper spring seat The damper spring is coupled to the lower spring seat. The damper sleeve is disposed between the bracket and the upper spring seat. The damper sleeve passes through the damper sleeve, and the damper sleeve provides a variable damping force to the boom.
A variable damping vibration damping device for a washing machine according to claim 1, wherein said damping sleeve is provided with a variable damping structure, the variable damping structure is subjected to force, the damping sleeve is radially deformed, the inner diameter is reduced, and the damping force is Increase.
The variable damping device of a washing machine according to claim 2, wherein the variable damping structure comprises a first variable damping structure and/or a second variable damping structure, and the first variable damping structure is disposed on the damping sleeve On the end surface of the support bracket, the downward pressure of the bracket is converted into the pressure of the radial deformation of the damping sleeve, the inner diameter is reduced, the damping force of the boom is increased, and the second variable damping structure is disposed on the contact surface of the damping sleeve and the upper spring seat. The supporting force of the upper spring seat is converted into the radial pressing force of the damping sleeve, the inner diameter is reduced, and the damping force of the boom is increased.
A variable damping vibration damping device for a washing machine according to claim 1, wherein said damping sleeve comprises a tray supporting a bracket, a support sleeve extending through the tray into the upper spring seat, and a through tray and A hanger mounting hole of the support sleeve, and the tray and/or the support sleeve is provided with a variable damping structure that is forced to reduce the inner diameter of the damping sleeve.
A variable damping vibration damping device for a washing machine according to claim 4, wherein said upper surface of said tray is provided with at least one annular projection along the outer circumference of the hanger mounting hole, and the annular projection is gradually lowered from the inside to the outside. The surface has a curved surface structure, and the lower portion of the bracket is provided with a concave pressing surface matching the annular protrusion, and the annular protrusion is a variable damping structure on the tray. Preferably, the upper surface of the tray is provided with two concentric centers. Annular projections.
A variable damping vibration damping device for a washing machine according to claim 4 or 5, wherein at least one compression rib is provided on the peripheral wall of the support sleeve, and the height of the compression rib protruding from the surface of the support sleeve is along the support sleeve. The axial direction is gradually increased from the bottom to the top, and the compression rib is a variable damping structure on the support sleeve. Preferably, the compression ribs are 3-8, and are evenly distributed in the circumferential direction.
A variable damping vibration damping device for a washing machine according to claim 4, wherein at least one damping rib is disposed on the inner wall of the hanger mounting hole in the axial direction. Preferably, the damping rib is 2-6. Strips are evenly distributed along the circumference.
A variable damping vibration damping device for a washing machine according to claim 4, wherein: the upper portion of the upper spring seat is provided with a mounting groove, and the lower portion is provided with a mounting post for positioning a vibration reducing spring, and the lifting rod runs through the mounting groove The mounting post has a ring gap between the boom and the inner wall of the mounting groove, and constitutes a receiving portion for receiving the supporting sleeve. The variable damping structure on the supporting sleeve is pressed into contact with the opening of the mounting slot. Preferably, the mounting post is provided by the mounting post. The mounting groove is configured to extend downward.
A variable damping vibration damping device for a washing machine according to claim 1, wherein said lower spring seat comprises a vibration-damping spring holder, an oil-containing felt, a sliding cup and a lower support pad, and the upper end of the vibration-damping spring and the upper spring The support is connected, the lower end is supported above the vibration-damping spring support, and the oil-containing felt, the sliding cup and the lower support pad are sequentially disposed under the vibration-damping spring support.
A washing machine characterized by comprising the variable damping device of the washing machine according to any one of claims 1-9, wherein the upper support supports the outer bucket boom seat, and when the washing machine starts the dehydration operation, the partial load is too large, and the outer barrel Applying eccentric force to the casing, damping sleeve, damper sleeve, radial deformation, extrusion boom, damping force becomes larger; dehydration continues to operate, the eccentric load becomes smaller, the eccentric force of the outer barrel to the casing and the damping sleeve is released, and the damping sleeve is restored. The damping force becomes smaller.