CN106930046B - Variable-damping vibration attenuation device of washing machine and washing machine - Google Patents
Variable-damping vibration attenuation device of washing machine and washing machine Download PDFInfo
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- CN106930046B CN106930046B CN201511028796.2A CN201511028796A CN106930046B CN 106930046 B CN106930046 B CN 106930046B CN 201511028796 A CN201511028796 A CN 201511028796A CN 106930046 B CN106930046 B CN 106930046B
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
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Abstract
The invention discloses a variable damping vibration attenuation device of a washing machine and the washing machine, the variable damping vibration attenuation device comprises a suspender, an upper support, a sleeve and a pressure buffer mechanism arranged in the sleeve, the upper end of the sleeve is provided with a bracket, the suspender penetrates through the upper support and the bracket and extends into the sleeve to be connected with the pressure buffer mechanism, at least one damping sleeve sleeved on the suspender is arranged between the upper support and the pressure buffer mechanism, and the damping sleeve provides variable damping force for the suspender. When the washing machine starts to dehydrate and run, the unbalance loading is overlarge, the outer barrel applies eccentric force to the damping sleeve, the damping sleeve deforms and extrudes the suspender in the radial direction, and the damping force is increased; the dehydration continues to run, the eccentric load becomes small, the eccentric force of the outer barrel to the damping sleeve is released, the damping sleeve is recovered, and the damping force becomes small. The invention can stably change the damping elastic coefficient of the suspender, improve the damping performance, reduce the working noise and enhance the damping effect.
Description
Technical Field
The invention relates to the technical field of washing machines, in particular to a washing machine vibration damper, and particularly relates to a variable-damping vibration damper of a washing machine and the washing machine adopting the vibration damper.
Background
The existing washing machines are classified into pulsator washing machines and drum washing machines, wherein the pulsator washing machines structurally comprise: a casing forming the appearance of the washing machine; an outer tub suspended and fixed by a support member and containing washing water is provided inside the housing; an inner barrel rotatably installed inside the outer barrel and provided with a stirrer at the bottom thereof; a driving motor installed at the lower side of the outer tub and used for generating driving force of the stirrer and the inner tub; a power transmission device for selectively providing a driving force of the driving motor to the pulsator and the inner tub; and a water draining unit installed in the lower part of the outer tub for draining the washing water held in the outer tub to the outside, the outer tub being hung on the casing by a hanger unit.
At present, a suspender device comprises a suspender, a suspender seat, a ball seat, a spring and a spring seat, wherein the suspender seat is arranged at the top end of the suspender, the spring seat, the spring and the ball seat sequentially penetrate upwards on the suspender from the bottom end of the suspender, and a friction plate is sleeved in the ball seat; the shell of the washing machine is provided with a spherical groove, and the convex spherical surface of the lifting rod seat is matched with the spherical groove on the shell; the bottom end of the outer barrel is also provided with a spherical groove, and the convex spherical surface of the ball seat is matched with the spherical groove at the bottom end of the outer barrel, so that the inner barrel and the outer barrel are hung on the shell of the washing machine.
When the washing machine works, the vibration generated by the outer barrel can cause the ball seat to move up and down, and the ball seat further generates damping force through the expansion and contraction of the spring and the reciprocating friction of the friction plate and the suspender, so that the vibration is inhibited, and the aim of improving the vibration noise level of the whole machine is fulfilled.
However, due to the single spring structure, the change of the elastic coefficient of the suspension rod is small, and the vibration damping effect is lost after the single spring is completely compressed, so that the suspension rod cannot play a good vibration damping effect during washing and dewatering of the washing machine, and the washing machine vibrates greatly and has a large moving distance. In the dehydration transient stage, the internal system vibrates greatly, and a relatively large damping force is required to be provided by the suspender device to inhibit the internal system vibration; in the dehydration steady-state stage, the internal system has less vibration, and the suspender device is required to provide relatively small damping force to isolate vibration; the suspender can only provide a single damping force through the friction plate, and when the suspender is assembled, the surface of the ball seat is greased to improve the lubricating condition; therefore, in the dehydration transient stage with large vibration of the internal system, the damping force of the suspender device can often difficultly inhibit the vibration of the system in operation; in the dehydration steady state stage with small vibration of the internal system, the suspension rod device can move up and down under the action of the viscosity of the grease and the damping force of the suspension rod, and the problem of abnormal vibration noise occurs.
Chinese patent application No. 200810243936.1 discloses a combined spring vibration damping boom, which comprises a boom body, a connecting seat, a mounting seat, a group of springs and a fixed seat, wherein the connecting seat is located at the top end of the boom body, and the boom body is arranged on a casing of a washing machine through the connecting seat; the mounting seat is positioned at the lower part of the rod body and is used for mounting an outer barrel of the washing machine; the fixing base is located the bottom of the body of rod, and a set of spring suit is on the body of rod and is located between mount pad and the fixing base, and a set of spring is established ties together through the adapter sleeve between.
Although the above structure adopts a set of springs connected in series to provide damping force, the series connection mode does not solve the problem of providing relatively large damping force to inhibit the vibration of the internal system at the moment of dehydration; in addition, if the overall length of the shock absorber is not changed, the lengths of the two groups of springs are required to be reduced, the elastic coefficients of the two springs are relatively increased, the deformation of the springs is small, and small damping force cannot be provided in the dehydration stabilization stage; if the length of the existing spring is adopted, the overall length of the shock absorber is relatively increased, the swinging stability of the outer barrel is reduced, and particularly, the outer barrel is easy to be eccentrically beaten during dewatering to generate noise.
In view of this characteristic, the present invention is proposed.
Disclosure of Invention
The technical problem to be solved by the invention is to overcome the defects of the prior art and provide a variable damping vibration attenuation device of a washing machine, which can stably change the vibration attenuation elastic coefficient of a suspender, improve the vibration attenuation performance, reduce the vibration and the moving distance of the washing machine and reduce the 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 technical problems, the invention adopts the technical scheme that:
a damping-variable vibration damper for washing machine is composed of a suspension rod, a top supporter, a sleeve tube with a supporting frame at its upper end, a pressure buffer mechanism in said sleeve tube, and at least one damping sleeve between said top supporter and pressure buffer mechanism for providing the damping force variable to said suspension rod. Furthermore, a damping sleeve between the upper support and the pressure buffering mechanism is arranged between the upper support and the bracket and/or between the bracket and the pressure buffering mechanism, the damping sleeve deforms and extrudes inwards, and the friction force between the damping sleeve and the suspender is increased.
Furthermore, the damping sleeve is provided with a variable damping structure, and the variable damping structure bears the pressure in the axial direction, so that the damping sleeve deforms in the radial direction, the inner diameter is reduced, and the damping force is increased.
Furthermore, the variable damping structure comprises a first variable damping structure and/or a second variable damping structure, the first variable damping structure converts the downward pressure on the damping sleeve in the axial direction into the inward extrusion force in the radial direction of the damping sleeve, the inner diameter is reduced, the damping force of the suspender is increased, the second variable damping structure converts the upward supporting force on the damping sleeve in the axial direction into the inward extrusion force in the radial direction of the damping sleeve, the inner diameter is reduced, and the damping force of the suspender is increased.
The damping sleeve comprises a tray for supporting the upper support, a supporting sleeve arranged below the tray and extending into the bracket, and a suspender mounting hole penetrating through the tray and the supporting sleeve, wherein the tray and/or the supporting sleeve are/is provided with a damping-variable structure for reducing the inner diameter of the damping sleeve after being stressed. The damping sleeve is of a T-shaped structure and is a damping rubber sleeve.
Furthermore, the bracket is provided with an installation groove with an upward opening, the suspension rod penetrates through the bracket from the installation groove, a circle of gap is formed between the suspension rod and the inner wall of the installation groove to form an accommodating part for accommodating the support sleeve, the variable damping structure on the support sleeve is in pressing contact with the opening of the installation groove, and preferably, the installation groove extends towards the inside of the sleeve and protrudes out of the inner wall of the bracket to form a guide column for guiding the pressure buffering mechanism.
Furthermore, the pressure buffering mechanism comprises a damping spring, a damping spring support, an oil-containing felt, a sliding leather cup and a lower supporting pad, the upper end of the damping spring is connected with the bracket support, the lower end of the damping spring is supported above the damping spring support, and the oil-containing felt, the sliding leather cup and the lower supporting pad are sequentially arranged below the damping spring support.
Or, a further alternative is that the pressure buffering mechanism comprises an upper spring seat, a damping spring and a lower spring seat, the damping spring is installed between the upper spring seat and the lower spring seat, a damping sleeve is arranged between the bracket and the upper spring seat, the damping sleeve comprises a tray for supporting the bracket, a supporting sleeve arranged below the tray and extending into the upper spring seat, and a suspender installing hole penetrating through the tray and the supporting sleeve, and the tray and/or the supporting sleeve are/is provided with a damping-reducing structure for reducing the inner diameter of the damping sleeve after being stressed. The damping sleeve is of a T-shaped structure and is a damping rubber sleeve.
Furthermore, the upper portion of the upper spring seat is provided with a mounting groove, the lower portion of the upper spring seat is provided with a mounting column for positioning the vibration reduction spring, the suspension rod penetrates through the mounting column from the inside of the mounting groove, a circle of gap is formed between the suspension rod and the inner wall of the mounting groove to form a containing portion for containing the supporting sleeve, the variable damping structure on the supporting sleeve is in pressing contact with the opening of the mounting groove, and preferably, the mounting column is formed by downward extending of the mounting groove.
Furthermore, lower spring holder include damping spring support, oiliness felt, slip leather cup and bottom suspension pad, damping spring upper end and last spring holder support connection, the lower extreme supports in damping spring support top, oiliness felt, slip leather cup and bottom suspension pad locate damping spring support below in proper order.
Further, the tray upper surface be equipped with an at least annular arch along jib mounting hole periphery, annular arch is gradually low from inside to outside, and the surface is ARC structure, annular arch is the variable damping structure on the tray, preferably, the tray upper surface is equipped with the annular arch of two concentric circles.
Furthermore, the circumferential wall of the support sleeve is provided with at least one compression convex rib, the height of the compression convex rib protruding out of the surface of the support sleeve is gradually increased from bottom to top along the axial direction of the support sleeve, the compression convex rib is a variable damping structure on the support sleeve, and preferably, the number of the compression convex ribs is 3-8, and the compression convex ribs are uniformly distributed along the circumferential direction.
Furthermore, at least one damping convex rib is axially arranged on the inner wall of the suspender mounting hole, preferably, the number of the damping convex ribs is 2-6, and the damping convex ribs are uniformly distributed along the circumferential direction.
Furthermore, the pressure buffer mechanism comprises a damping spring, the damping spring is composed of a first spring and a second spring which are connected in series, and the end part of the first spring extends to the inside of the second spring through a connecting support piece to be connected with the second spring. The elastic coefficient of the first spring is k1, the elastic coefficient of the second spring is k2, k1 is more than k2, and the total elastic coefficient is k 1/(1/k1+1/k 2).
Further, the connecting support piece include first supporting part, second supporting part and connect the connecting portion of two supporting parts, the support direction of two supporting parts sets up relatively, first supporting part supports the one end that first spring extended to the inside of second spring, the second supporting part supports the one end of second spring housing at first spring outside.
Furthermore, the connecting and supporting piece is of a cylindrical structure, one end of the connecting and supporting piece is bent inwards to form a first supporting part, the other end of the connecting and supporting piece is bent outwards to form a second supporting part, one end of the first spring stretches into the connecting and supporting piece to be supported on the first supporting part, and one end of the second spring is sleeved on the second supporting part which is supported outside the connecting and supporting piece.
Furthermore, the inner edge of the first supporting part is bent towards the direction of the first spring to form a first limiting part for positioning the end part of the first spring, and the outer edge of the second supporting part is bent towards the direction of the second spring to form a second limiting part for positioning the end part of the second spring.
Furthermore, the lower end face of the guide column or the mounting column is provided with an annular spring positioning mounting groove, and preferably, the length of the guide column or the mounting column is not more than the distance from the second supporting part to the first supporting part. I.e. not more than the length of the first spring extending into the interior of the connection support.
Further, the elastic systems of the first spring and the second spring are different.
Preferably, the spring constant of the first spring is greater than the spring constant of the second spring.
More preferably, the length of the first spring is smaller than the length of the second spring.
When the washing machine with the variable damping vibration attenuation device starts to dehydrate, the unbalance loading is overlarge, the outer barrel applies eccentric force to the damping sleeve, the damping sleeve radially deforms and extrudes the suspender, and the damping force is increased; the dehydration continues to run, the eccentric load becomes small, the eccentric force of the outer barrel to the damping sleeve is released, the damping sleeve is recovered, and the damping force becomes small.
Further, the larger the eccentric force is, the larger the damping force of the damping sleeve on the suspension rod is, the smaller the eccentric force is, and the smaller the damping force of the damping sleeve on the suspension rod is.
Further, the total weight of the outer barrel also applies pressure to the damping sleeve, when the dewatering operation is started, the pressure applied to the damping sleeve is the largest, the damping force is the largest, and in the dewatering process, along with the throwing of water in clothes, the pressure applied to the damping sleeve is reduced, and the damping force is reduced.
After the technical scheme is adopted, compared with the prior art, the invention has the following beneficial effects.
The variable damping vibration damper can solve the problems that the existing vibration damper is uneven in load and easy to press and causes high noise when the large-capacity washing machine is started for dewatering.
The washing machine disclosed by the invention simultaneously realizes the dual functions of suppressing the vibration by transient dehydration and isolating the vibration by steady-state dehydration, so that the vibration noise level in the dehydration stage can be effectively improved, and the problem of up-and-down movement of a vibration damper is effectively avoided.
The variable damping vibration attenuation device of the washing machine realizes the change of the elastic coefficient in the washing and dehydration stages, improves the vibration attenuation performance, reduces the vibration and moving distance of the washing machine and reduces the noise, improves the damping performance by more than 50 percent compared with the damping performance of a common vibration attenuation part, and is generally suitable for the pulsator washing machine.
Two springs of the pressure buffer mechanism are connected in series, a series structure that one spring extends into the other spring is adopted, the total length of the two springs is reduced, the total spring coefficient can also be reduced, the spring coefficient of the first spring is large, the dehydration bearing range of the washing machine can be enlarged, the good vibration and noise reduction effect can be achieved when the small load is achieved, the dehydration starting performance can be improved when the large load is achieved, and the better effect is achieved on the dehydration stability of the washing machine.
When the two series springs act simultaneously, the damping change effect of the damping sleeve is matched, so that the problem of up-and-down movement of the damping device caused by sudden change of the elastic coefficient is avoided, the damping buffering is more stable, the damping performance is improved, and the damping effect is enhanced.
Drawings
FIG. 1 is a schematic structural view of a variable damping vibration damper of a washing machine according to the present invention;
FIG. 2 is a cross-sectional structural view of the variable damping vibration damping device of the washing machine of the present invention;
FIG. 3 is a schematic view of the assembly structure of the variable damping vibration damping device of the washing machine of the present invention;
FIGS. 4 and 5 are schematic views of the damping sleeve according to the present invention;
FIG. 6 is an enlarged schematic view of section A of FIG. 2;
FIG. 7 is a schematic view of the construction of the connection support of the present invention;
fig. 8 to 11 are schematic views of different structures of the variable damping vibration damping device of the washing machine according to the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 11, the variable damping vibration damping device of a washing machine according to the present invention comprises a suspension rod 1, an upper support 2, a sleeve 3 and a pressure buffering mechanism arranged in the sleeve 3, wherein the upper end of the sleeve 3 is integrally provided with a bracket 6, the lower end is provided with a bottom cover 30, the suspension rod 1 penetrates through the upper support 2 and the bracket 6, extends into the sleeve 3 and is connected with the pressure buffering mechanism, at least one damping sleeve 8 sleeved on the suspension rod 1 is arranged between the upper support 2 and the pressure buffering mechanism, and the damping sleeve 8 provides a variable damping force for the suspension rod 1. The damping sleeve 8 between the upper support 2 and the pressure buffering mechanism is arranged between the upper support 2 and the bracket 6 and/or between the bracket 6 and the pressure buffering mechanism, external force is applied to the outer barrel of the washing machine to enable the damping sleeve 8 to deform and extrude inwards, and friction force between the damping sleeve 8 and the suspender 1 is increased.
Furthermore, the damping sleeve 8 is provided with a variable damping structure, the variable damping structure is stressed, the damping sleeve 8 radially deforms, the inner diameter is reduced, the suspender 1 is extruded, and the damping force is increased.
As shown in fig. 4 and 5, the variable damping structure includes a first variable damping structure 10 and/or a second variable damping structure 11, the first variable damping structure 10 converts the downward pressure on the damping sleeve 8 in the axial direction into the inward extrusion force in the radial direction of the damping sleeve 8, the inner diameter is reduced, the damping force of the boom is increased, the second variable damping structure 11 converts the upward supporting force on the damping sleeve 8 in the axial direction into the inward extrusion force in the radial direction of the damping sleeve 8, the inner diameter is reduced, and the damping force of the boom is increased.
Example one
As shown in fig. 2, 3, 6 and 10, the damping sleeve 8 of the present embodiment is disposed between the upper tray 2 and the bracket 6, and the damping sleeve 8 includes a tray 81 for supporting the upper tray 2, a supporting sleeve 82 disposed below the tray 81 and extending into the bracket 6, and a boom mounting hole 83 axially penetrating the tray 81 and the supporting sleeve 82. The damping sleeve 8 is a damping rubber sleeve and is integrally of a T-shaped integrated structure.
Further, as shown in fig. 4, the tray 81 is provided with a first variable damping structure 10 which reduces the inner diameter of the boom mounting hole 83 after being stressed, the first variable damping structure 10 is arranged on the upper end surface of the tray 81 to support the upper tray 2, the downward pressure of the upper tray 2 is converted into the pressure of the radial deformation of the damping sleeve 8, the inner diameter of the boom mounting hole 83 is reduced, and the damping force of the boom 1 is increased.
And/or, as shown in fig. 5, a second variable damping structure 11 is arranged on the support sleeve 82, the second variable damping structure 11 converts the upward support force of the bracket 6 on the damping sleeve 8 into a radially inward extrusion force of the damping sleeve 8, the inner diameter of the boom mounting hole 83 is reduced, and the boom damping force is increased.
As shown in fig. 6, the bracket 6 according to the embodiment is provided with a mounting groove 61 with an upward opening, the suspension rod 1 penetrates the bracket 6 from the mounting groove 61, a gap is formed between the suspension rod 1 and the inner wall of the mounting groove 61 to form an accommodating part 62 for accommodating the supporting sleeve 82, the second variable damping structure 11 on the supporting sleeve 82 is in pressing contact with the opening of the mounting groove 61, and the supporting force of the bracket 6 on the second variable damping structure 11 is converted into a pressing force inward toward the suspension rod 1, thereby providing the variable damping force of the suspension rod 1.
Preferably, the mounting groove 61 extends toward the inside of the casing 3 and protrudes from the inner wall of the bracket 6 to form a guide post 63 for guiding the pressure buffering mechanism.
As shown in fig. 2 and 3, the pressure buffer mechanism according to the present embodiment includes a damping spring 4, a damping spring holder 51, an oil-containing felt 52, a sliding cup 53 and a lower support pad 54, the upper end of the damping spring 4 is supported and connected with the bracket 6, the lower end is supported above the damping spring holder 51, and the oil-containing felt 52, the sliding cup 53 and the lower support pad 54 are sequentially disposed below the damping spring holder 51.
Example two
As shown in fig. 8 and 11, the damping sleeve 8 of the present embodiment is disposed between the bracket 6 and the pressure buffering mechanism, the pressure buffering mechanism includes an upper spring seat 7, a damping spring 4 and a lower spring seat 5, the damping spring 4 is mounted between the upper spring seat 7 and the lower spring seat 5, the damping sleeve 8 includes a tray 81 for supporting the bracket 6, a support sleeve 82 disposed below the tray 81 and extending into the upper spring seat 7, and a suspension rod mounting hole 83 axially penetrating through the tray 81 and the support sleeve 82. The damping sleeve 8 is a damping rubber sleeve and is integrally of a T-shaped integrated structure.
Further, the tray 81 on be equipped with and make the first damping structure 10 that becomes (refer to and draw together figure 4) that the jib mounting hole 83 internal diameter diminishes after the atress, first damping structure 10 that becomes is located and is supported bracket 6 on the tray 81 up end, the pressure that bracket 6 down converts into the radial deformation of damping sleeve 8 pressure, the jib mounting hole 83 internal diameter reduces, the damping force increase of jib 1.
And/or a second variable damping structure 11 (see fig. 5) is arranged on the support sleeve 82, the second variable damping structure 11 converts the support force of the upper spring seat 7 to the damping sleeve 8 into an extrusion force of the damping sleeve 8 in the radial inward direction, the inner diameter of the boom mounting hole 83 is reduced, and the damping force of the boom is increased.
As shown in fig. 8, in the embodiment, the upper portion of the upper spring seat 7 is provided with an installation groove 71 with an upward opening, the lower portion is provided with an installation column 72 for positioning the damping spring 4, the suspension rod 1 penetrates through the installation column 72 from the installation groove 71, a circle of gap is formed between the suspension rod 1 and the inner wall of the installation groove 71 to form an accommodation portion 73 for accommodating the support sleeve 82, the compression convex rib 85 on the support sleeve 82 is in pressing contact with the opening of the installation groove 71, and as the compression convex rib 85 is gradually higher from bottom to top, the support force of the upper spring seat 7 on the compression convex rib 85 on the support sleeve 82 is converted into the extrusion force inwards on the suspension rod 1, thereby providing the variable damping.
Preferably, the mounting post 72 is formed by extending the mounting groove 71 downward.
EXAMPLE III
In this embodiment, the first embodiment and the second embodiment are combined, and as shown in fig. 9, a damping sleeve 8 is respectively disposed between the upper support 2 and the bracket 6, and between the bracket 6 and the pressure buffering mechanism.
Example four
As shown in fig. 4, an annular protrusion 84 is disposed on the upper surface of the tray 81 according to this embodiment along the periphery of the boom mounting hole 83, the annular protrusion 84 gradually lowers from inside to outside, the surface is an arc surface, and the whole is a spherical segment structure with a center penetrating through, the boom mounting hole 83 penetrates through the center, the contact surface between the lower portion of the upper tray 2 and/or the bracket 6 and the upper surface of the tray 81 is a concave pressing surface matched with the annular protrusion 84 (see fig. 6), and the annular protrusion 84 is the first variable damping structure 10 on the tray 81.
Further, the first variable damping structure 10 is an inner concentric annular protrusion 84 and an outer concentric annular protrusion 84 disposed on the upper surface of the tray 81.
EXAMPLE five
As shown in fig. 5, at least one compression rib 85 is disposed on the circumferential wall of the supporting sleeve 82 in the embodiment, the height of the compression rib 85 protruding from the surface of the supporting sleeve 82 is gradually increased from bottom to top along the axial direction of the supporting sleeve 82, and the compression rib 85 is the second variable damping structure 11 on the supporting sleeve 82. The upward extending end of the compression rib 85 is connected with the lower surface of the tray 81 in a smooth transition way.
Preferably, the number of the compressed ribs 85 is 4-6, and the compressed ribs are uniformly distributed along the circumferential direction of the support sleeve 82.
EXAMPLE six
The difference between this embodiment and the fifth embodiment is that the outer diameter of the support sleeve gradually increases from bottom to top, and the upper end of the support sleeve smoothly transitions with the lower surface of the tray (not shown in the figure).
EXAMPLE seven
As shown in fig. 4 and 5, in this embodiment, at least one damping rib 86 is axially disposed on the inner wall of the boom mounting hole 83, and preferably, the damping ribs 86 are 2 to 4 and are uniformly distributed along the circumferential direction.
The damping spring 4 according to the above embodiment of the present invention is a single spring (see fig. 10 and 11), or a spring assembly formed by combining at least two springs (see fig. 2, 3, 8, and 9).
Example eight
As shown in fig. 2, 3, 8 and 9, the damper spring 4 according to the present embodiment includes a first spring 41 and a second spring 42 connected in series, and an end of the first spring 41 extends to an inside of the second spring 42 through the connection support 9 to be connected to the second spring 42.
As shown in fig. 7, the connection support 9 includes a first support portion 91, a second support portion 92 and a connection portion 93 connecting the two support portions, the support directions of the first support portion 91 and the second support portion 92 are opposite to each other, the first support portion 91 supports one end of the first spring 41 extending to the inside of the second spring 42, and the second support portion 92 supports one end of the second spring 42 sleeved on the outside of the first spring 41 (see fig. 6).
Further, as shown in fig. 6, in combination with the embodiment, an annular spring positioning mounting groove 64 is formed on a lower end surface of the guide post 63 at the lower portion of the bracket 6, an upper end of the first spring 41 is connected to the bracket 6 and is mounted in the annular spring positioning mounting groove 64, and a lower end of the second spring 42 is supported on the lower spring seat 5. As shown in fig. 8, in combination with the second embodiment, the lower end surface of the mounting column 72 of the upper spring seat 7 is provided with an annular spring positioning mounting groove 74, the upper end of the first spring 41 is connected with the upper spring seat 7 in a positioning and supporting manner and is mounted in the annular spring positioning mounting groove 74, and the lower end of the second spring 42 is supported on the lower spring seat 5.
Preferably, the length of the guide post 63 or the mounting post 72 is not greater than the distance between the second support 92 and the first support 91. I.e. not more than the length of the first spring 41 projecting inside the connection support 9.
Example nine
As shown in fig. 7, the connection supporting member 9 according to this embodiment is a cylindrical structure, one end of which is bent inward to form a first supporting portion 91, and the other end of which is bent outward to form a second supporting portion 92, one end of the first spring 41 extends into the connection supporting member 9 and is supported on the first supporting portion 91, and one end of the second spring 42 is sleeved on the outside of the connection supporting member 9 and is supported on the second supporting portion 92.
Further, the inner edge of the first supporting portion 91 is bent toward the first spring 41 to form a first limiting portion 94 for positioning the end of the first spring 41, and the outer edge of the second supporting portion 92 is bent toward the second spring 42 to form a second limiting portion 95 for positioning the end of the second spring 42.
Example ten
The elastic systems of the first spring 41 and the second spring 42 are different in the embodiment, preferably, the elastic coefficient of the first spring 41 is greater than that of the second spring 42, and more preferably, the length of the first spring 41 is less than that of the second spring 42.
The elastic coefficient of the first spring 41 is k1, the elastic coefficient of the second spring 42 is k2, k1 is greater than k2, and the total elastic coefficient is k 1/(1/k1+1/k 2).
The damper device of the present invention is such that both the first spring 41 and the second spring 42 act simultaneously before the second spring 42 is compressed. After the second spring 42 is pressed, the first spring 41 is activated. The series structure increases the load carried by the washing machine, and the phenomenon of sudden change of the total spring coefficient can occur later.
When the external force is applied, the suspension rod drives the first spring 41 and the second spring 42 to perform a compression motion, when the external force disappears, the first spring 41 and the second spring 42 perform a return motion under the action of the elastic force of the suspension rod, and when the first spring 41 is compressed, part or all of the first spring 41 is compressed into the second spring 42, so that the vibration amplitude of the tub is relatively reduced.
EXAMPLE eleven
When the washing machine is unloaded, the second spring 42 plays a main role, and along with the increase of the water inlet quantity, the action of the second spring 42 is gradually weakened until the second spring is pressed and loses elastic displacement. The first spring 41 action increases gradually. When the washing machine is filled with water to full capacity, the first spring 41 is nearly in a compressed state.
The design of the elastic coefficient of the damping spring is calculated and tested and verified under various conditions of no load, different loads, full load and the like of the washing machine.
When water enters the inner tub of the washing machine to increase the weight of the inner tub, the second spring 42 located below the connection support 9 is compressed to be deformed more, and the first spring 41 located above the connection support 9 is compressed to be deformed less. Since the second spring 42 is located between the connection supporter 9 and the lower spring seat 5, the sleeve 3 moves downward, and the sleeve 3 and the connection supporter 9 are relatively displaced with respect to the suspension rod 1 until the second spring 42 located below the connection supporter 9 is compressed and the first spring 41 located above the connection supporter 9 is gradually compressed at the same time.
In the dewatering stage of the washing machine, the two springs of the first spring 41 and the second spring 42 act simultaneously, and the spring coefficient of the serial structure is 1/(1/K1+ 1/K2) when the two springs act simultaneously, so that the matching of the spring coefficients K1 and K2 of the two springs can be more flexible, and the range of the dewatering bearing load can be wider by adjusting different spring coefficients, and more dewatering capacity can be borne.
When the washing machine starts a dehydration program, the washing machine starts to drain water firstly, the first spring 41 starts to release after the washing machine discharges a certain amount of water, and the washing machine can perform low-speed dehydration operation when the first spring 41 has a certain buffering function, and at this time, the buffering displacement of the first spring 41 is small, so that the washing machine is not suitable for performing high-speed dehydration. When the water is about to be drained, the second spring 42 starts to be released, and the high-speed dewatering operation can be performed when the second spring 42 has a large buffer displacement. When the dewatering machine is used for dewatering, the two springs simultaneously play a role in vibration reduction and noise reduction.
Specifically, during the dewatering operation, the tub in operation generates a rocking force, when the rocking force acts on the suspension rod 1, the damping spring connected to the suspension rod 1 is acted on by a force, because the elastic coefficient of the first spring 41 is greater than that of the second spring 42, when the rocking force acts, the second spring 42 first generates a large displacement, when the second spring 42 is completely compressed, the first spring 41 is not completely compressed, when the rocking force disappears for a short time, the second spring 42 and the first spring 41 generate a restoring force, and the damping part releases the consumption of the rocking force of the tub by the restoring force generated by the springs.
Example twelve
The present invention is a washing machine with the damping-variable vibration damping device in the above-mentioned embodiment, and the structure of the hanging rod seat for supporting the outer barrel is a technique known to those skilled in the art, and will not be described in detail herein. When the washing machine starts to dehydrate and run, the eccentric load is overlarge, the outer barrel can apply eccentric force to the damping sleeve 8 of the variable damping vibration attenuation device, the damping sleeve 8 is axially compressed and radially deformed to extrude the suspender 1, and the damping force is increased; the dehydration continues to run, the unbalance load becomes small, the variable damping vibration attenuation device releases the eccentric force of the outer barrel to the damping sleeve 8, the damping sleeve 8 recovers, and the damping force becomes small.
Further, the larger the eccentric force is, the larger the damping force of the damping sleeve 8 on the suspension rod 1 is, the smaller the eccentric force is, and the smaller the damping force of the damping sleeve 8 on the suspension rod 1 is.
Further, the total weight of the outer barrel also applies pressure to the damping sleeve 8, when the dewatering operation is started, the pressure applied to the damping sleeve 8 is the largest, the damping force is the largest, and in the dewatering process, along with the throwing of water in clothes, the pressure applied to the damping sleeve 8 is reduced, and the damping force is reduced.
The embodiments in the above embodiments can be further combined or replaced, and the embodiments are only used for describing the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention, and various changes and modifications made to the technical solution of the present invention by those skilled in the art without departing from the design idea of the present invention belong to the protection scope of the present invention.
Claims (21)
1. The utility model provides a washing machine becomes damping vibration damper, includes jib, pop-up, sleeve pipe and establishes the pressure buffer gear in the sleeve pipe, and the sleeve pipe upper end has the bracket, and the jib runs through pop-up, bracket, extends to and is connected its characterized in that with pressure buffer gear in the sleeve pipe: at least one damping sleeve sleeved on the suspender is arranged between the upper support and the pressure buffering mechanism, the damping sleeve provides variable damping force for the suspender, the pressure buffering mechanism comprises a damping spring, the damping spring is composed of a first spring and a second spring which are connected in series, and the end part of the first spring extends to the inside of the second spring through a connecting support piece to be connected with the second spring; connecting support piece is the tubular structure, and one end inwards buckles and forms first supporting part, and the other end outwards buckles and forms the second supporting part, and first spring one end stretches into connecting support piece inside and supports on first supporting part, and the first spring other end extends to being close to damping cover direction, and second spring pot head is on connecting support piece outside support on the second supporting part, and the second spring other end extends to keeping away from damping cover direction, first supporting part in the border buckle to first spring direction and form the first spacing portion of the first spring tip of location, the second supporting part outside border is buckled to second spring direction and is formed the spacing portion of second of location second spring tip.
2. A variable damping vibration damper for washing machine according to claim 1, characterized in that: the damping sleeve is provided with a variable damping structure, and the variable damping structure bears the pressure in the axial direction, so that the damping sleeve deforms in the radial direction, the inner diameter is reduced, and the damping force is increased.
3. A variable damping vibration damper for washing machine according to claim 2, characterized in that: the variable damping structure comprises a first variable damping structure and/or a second variable damping structure, the first variable damping structure converts the downward pressure of the axial direction to the damping sleeve into the inward extrusion force of the radial direction of the damping sleeve, the inner diameter is reduced, the damping force of the suspender is increased, the second variable damping structure converts the upward supporting force of the axial direction to the damping sleeve into the inward extrusion force of the radial direction of the damping sleeve, the inner diameter is reduced, and the damping force of the suspender is increased.
4. A variable damping vibration damper for washing machine according to claim 1, characterized in that: the damping sleeve is arranged between the upper support and the bracket and comprises a tray for supporting the upper support, a supporting sleeve arranged below the tray and extending into the bracket and a suspender mounting hole penetrating through the tray and the supporting sleeve, and the tray and/or the supporting sleeve are/is provided with a damping-variable structure for reducing the inner diameter of the damping sleeve after being stressed.
5. A variable damping vibration damper for washing machine as claimed in claim 4, characterized in that: the bracket is provided with an installation groove with an upward opening, the suspension rod penetrates through the bracket from the installation groove, a circle of gap is arranged between the suspension rod and the inner wall of the installation groove to form an accommodating part for accommodating the supporting sleeve, and the variable damping structure on the supporting sleeve is in extrusion contact with the opening of the installation groove.
6. A variable damping vibration damper for washing machine as claimed in claim 5, wherein: the mounting groove extends towards the interior of the sleeve and protrudes out of the inner wall of the bracket to form a guide column for guiding the pressure buffering mechanism.
7. A variable damping vibration damper for washing machine as claimed in claim 4, characterized in that: the pressure buffer mechanism further comprises a damping spring support, an oil-containing felt, a sliding leather cup and a lower supporting pad, the upper end of the damping spring is connected with the bracket support, the lower end of the damping spring is supported above the damping spring support, and the oil-containing felt, the sliding leather cup and the lower supporting pad are sequentially arranged below the damping spring support.
8. A variable damping vibration damper for washing machine according to claim 1, characterized in that: the pressure buffer mechanism comprises an upper spring seat and a lower spring seat, a vibration reduction spring is installed between the upper spring seat and the lower spring seat, a damping sleeve is arranged between the bracket and the upper spring seat, the damping sleeve comprises a tray for supporting the bracket, a supporting sleeve arranged below the tray and extending into the upper spring seat and a suspender installing hole penetrating through the tray and the supporting sleeve, and the tray and/or the supporting sleeve are/is provided with a damping-variable structure for reducing the inner diameter of the damping sleeve after being stressed.
9. A variable damping vibration damper for washing machine according to claim 8, characterized in that: the upper portion of the upper spring seat is provided with a mounting groove, the lower portion of the upper spring seat is provided with a mounting column for positioning the vibration reduction spring, the suspension rod penetrates through the mounting column from the mounting groove, a circle of gap is formed between the suspension rod and the inner wall of the mounting groove, a containing portion for containing the support sleeve is formed, and the variable damping structure on the support sleeve is in extrusion contact with the opening of the mounting groove.
10. A variable damping vibration damping device for washing machine according to claim 9, characterized in that: the mounting column is formed by downward extending of the mounting groove.
11. A variable damping vibration damper for washing machine according to claim 8, characterized in that: the lower spring seat comprises a damping spring support, an oil-containing felt, a sliding leather cup and a lower supporting pad, the upper end of the damping spring is in supporting connection with the upper spring seat, the lower end of the damping spring is supported above the damping spring support, and the oil-containing felt, the sliding leather cup and the lower supporting pad are sequentially arranged below the damping spring support.
12. A variable damping vibration damping device for washing machine according to any one of claims 4-11, characterized in that: the tray upper surface be equipped with an at least annular arch along jib mounting hole periphery, annular arch gradually hangs down from inside to outside, the surface is ARC structure, annular arch is the variable damping structure on the tray.
13. A variable damping vibration damping device for washing machine according to claim 12, wherein: the upper surface of the tray is provided with two concentric annular bulges.
14. A variable damping vibration damping device for washing machine according to any one of claims 4-11, characterized in that: the supporting sleeve is characterized in that at least one compression convex rib is arranged on the peripheral wall of the supporting sleeve, the height of the compression convex rib protruding out of the surface of the supporting sleeve is gradually increased along the axial direction of the supporting sleeve from bottom to top, and the compression convex rib is a variable damping structure on the supporting sleeve.
15. A variable damping vibration damping device for washing machine as claimed in claim 14, wherein: the compressed convex ribs are 3-8 and are uniformly distributed along the circumferential direction.
16. A variable damping vibration damping device for washing machine according to any one of claims 4-11, characterized in that: at least one damping convex rib is axially arranged on the inner wall of the suspender mounting hole.
17. A variable damping vibration damping device for washing machine as claimed in claim 16, wherein: the damping convex ribs are 2-6 and are uniformly distributed along the circumferential direction.
18. A variable damping vibration damper for washing machine according to claim 1, characterized in that: the elastic systems of the first spring and the second spring are different.
19. A variable damping vibration damping device for washing machine as claimed in claim 18, wherein: the elastic coefficient of the first spring is larger than that of the second spring.
20. A variable damping vibration damper for washing machine according to any one of claims 1, 18 and 19, characterized in that: the length of the first spring is smaller than that of the second spring.
21. A washing machine characterized by: the damping-variable vibration damper of washing machine as claimed in any one of claims 1-20, wherein the outer tub hanger rod seat is supported by the upper support, when the washing machine starts to operate in dewatering mode, the eccentric load is too large, the outer tub applies eccentric force to the damping sleeve, the damping sleeve deforms to extrude the hanger rod in radial direction, and the damping force becomes large; the dehydration continues to run, the eccentric load becomes small, the eccentric force of the outer barrel to the damping sleeve is released, the damping sleeve is recovered, and the damping force becomes small.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511028796.2A CN106930046B (en) | 2015-12-30 | 2015-12-30 | Variable-damping vibration attenuation device of washing machine and washing machine |
| PCT/CN2016/107060 WO2017114035A1 (en) | 2015-12-30 | 2016-11-24 | Damping-variable vibration damping device for washing machine and washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201511028796.2A CN106930046B (en) | 2015-12-30 | 2015-12-30 | Variable-damping vibration attenuation device of washing machine and washing machine |
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| CN106930046A CN106930046A (en) | 2017-07-07 |
| CN106930046B true CN106930046B (en) | 2020-06-19 |
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| Country | Link |
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| WO (1) | WO2017114035A1 (en) |
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|---|---|---|---|---|
| CN108070982B (en) | 2016-11-10 | 2020-07-10 | 青岛胶南海尔洗衣机有限公司 | Washing machine damping device and washing machine |
| CN108070981B (en) * | 2016-11-10 | 2020-06-26 | 青岛胶南海尔洗衣机有限公司 | Washing machine damping device and washing machine |
| CN109793566B (en) * | 2019-01-11 | 2020-08-25 | 温月云 | Orthopedic nail taking device capable of preventing back movement |
| CN112342743B (en) * | 2019-08-09 | 2024-03-19 | 青岛海尔洗衣机有限公司 | Vibration damper of washing machine and washing machine |
| CN113638195A (en) * | 2020-05-11 | 2021-11-12 | 青岛海尔洗衣机有限公司 | Suspender component and washing machine |
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| JPS62122698A (en) * | 1985-10-30 | 1987-06-03 | 株式会社日立製作所 | Vibration-proof apparatus of washing machine |
| JP2000107488A (en) * | 1998-10-08 | 2000-04-18 | Toshiba Corp | Device for isolating vibration of washing machine |
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| CN106930046A (en) | 2017-07-07 |
| WO2017114035A1 (en) | 2017-07-06 |
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Effective date of registration: 20201105 Address after: 230601, No. 200, prosperous road, Hefei economic and Technological Development Zone, Anhui Patentee after: HEFEI HAIER WASHING MACHINE Co.,Ltd. Patentee after: Haier Zhijia Co.,Ltd. Address before: 230601, No. 200, prosperous road, Hefei economic and Technological Development Zone, Anhui Patentee before: HEFEI HAIER WASHING MACHINE Co.,Ltd. |
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