CN100532685C - Washing machine damper - Google Patents
Washing machine damper Download PDFInfo
- Publication number
- CN100532685C CN100532685C CNB2005100762133A CN200510076213A CN100532685C CN 100532685 C CN100532685 C CN 100532685C CN B2005100762133 A CNB2005100762133 A CN B2005100762133A CN 200510076213 A CN200510076213 A CN 200510076213A CN 100532685 C CN100532685 C CN 100532685C
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- washing machine
- piston
- cylinder barrel
- damping force
- machine damper
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Abstract
The invention relates to a damper of a washing machine which produces a large damping force for low-frequency vibration while small damping force for high-frequency vibration. A piston (3) coupled with a piston rod (4) is embedded inside a cylinder which is filled with mixed oil liquid and gas, and the piston (3) is infused in the oil liquid. No free piston and other isolators are arranged at the borderline of the oil liquid and gas inside the cylinder (2). The piston (3) is provided with a throttle path (7) communicated with two chambers (2A and 2B). The cylinder (2) is connected with one side of a water tank holding the cylinder, while the piston rod (4) is connected with one side of the shell. For low-frequency vibration during the washing and rinsing process, a large damping force is generated through the resistance of the oil liquid flowing through the throttle path (7) so as to restrain the shaking of the cylinder; while for the high-frequency vibration during the dehydrating process, inflated air is generated actively to reduce the damping force and to absorb the vibration of the cylinder so as to reduce the vibration and noise.
Description
Technical field
The present invention relates to washing machine damper, it is used to support the tank that accommodates the drum type washing machine cylinder.
Background technology
In general, in tumbling-box washing machines such as automatic washing machine, mounting spring and damper between the housing of roughly cylindric tank and formation washing machine outline, described tank has the rotating shaft with the ground approximate horizontal, hold and rotatably mounted input has the cylinder of washings, by described spring and damper suspention tank, thereby absorb, suppress the vibration that the cylinder rotation is produced.
As the general damping device that uses in the tumbling-box washing machine, known have frcition damper and a hydraulic damper.Though the sliding friction of frcition damper by friction means produces damping force, the timeliness of the damping force that produces because of the influences such as wearing and tearing of friction means changes greatly, is difficult to keep the damping force of long-term stability.And hydraulic damper piston of being connected with piston rod of setting-in slidably in enclosing the cylinder barrel of fluid, the flow resistance of the fluid by flowing through throttle orifice etc. produces damping force, and it is compared with frcition damper, can obtain the damping force of long-term stability.
But, washing automatically, in the full automatic drum type washing machine of rinsing and dehydration, when washing, rinse cycle or dehydration starting, can reduce the rotary speed of cylinder, and produce the bigger low-frequency vibration of amplitude.On the other hand, in dehydration, when rotary speed rose to a certain degree, amplitude diminished, and can produce dither.
For this reason, in following patent documentation 1, put down in writing a kind of hydraulic damper, by floating support vertically separate at the piston two ends, supporting to be to open and close the moushroom valve of fluid path, when the amplitude of piston hour, moushroom valve is not bearing on the piston, opens the fluid path, produces little damping force; When amplitude was big, moushroom valve was bearing on the piston, closed the fluid path, produced big damping force.Like this, for the low-frequency vibration of the large amplitude during for washing, rinse cycle and dehydration starting, can produce big damping force, suppress rocking of cylinder, for drum rotation speed rises to little amplitude and high frequency vibration in to a certain degree the dehydration, then can produce little damping force, absorb the vibration of cylinder, suppress vibration to the housing transmission.
[patent documentation 1] spy opens the 2001-214951 communique
But there is following problem in the hydraulic damper of record in the above-mentioned patent documentation 1: when large amplitude, can produce when moushroom valve contacts with piston and knock sound, become the reason that noise produces; Owing to but moushroom valve is supported by the piston rod floating ground, and can not locate with respect to piston, so the rising of damping force generation deviation, stable damping force can not be obtained; Because moushroom valve passes through the piston rod floating support, therefore, complex structure, in addition, because therefore the dimensional accuracy that the slide-and-guide portion of moushroom valve has relatively high expectations, can increase manufacturing cost.
Summary of the invention
The present invention researches and develops in view of above problem, and its purpose is to provide a kind of washing machine damper, and it is simple in structure, can reduce damping force to dither, low-frequency vibration energy is increased damping force, and can obtain stable damping force characteristic.
In order to solve above-mentioned problem, first aspect present invention provides a kind of tank that holds washing machine drum and washing machine damper between the housing of being installed in, it is characterized in that this washing machine damper is provided with: cylinder barrel, it has the piston action chamber that the piston that is connected with piston rod moves; Communication paths, it is arranged in the described piston and is communicated with two indoor chambers of described piston action of being divided by above-mentioned piston, and hybrid package has fluid and gas in described piston action chamber.
The washing machine damper of second aspect present invention, in the structure of above-mentioned first aspect, described cylinder barrel is installed between described cylinder and the described housing, so that under the outstanding side direction of the described piston rod of described cylinder barrel.
The washing machine damper of third aspect present invention, above-mentioned first or the structure of second aspect in, under the state that is installed between described tank and the described housing, in the actuating length scope of described piston, described piston is immersed in the fluid.
The washing machine damper of the present invention the 4th or eight aspect, in the structure of above-mentioned first to the 3rd either side, the size of the flow path area of described communication paths is: make the bubble that is produced by inflation in the chamber of the described piston underside in described cylinder barrel by described communication paths, within 60 seconds, the bubble collapse in the following side cavity.
The washing machine damper of the present invention the 5th or the 9th aspect, in the structure of above-mentioned first to the 3rd either side, the gas pressure of enclosing in the described cylinder barrel is 1～3kgf/cm
2
The washing machine damper of the present invention the 6th or the tenth aspect in the structure of above-mentioned first to the 3rd either side, is provided with the damping force guiding mechanism of the flow path area of adjusting described communication paths.
The present invention the 7th or the tenth washing machine damper on the one hand, in the structure of above-mentioned first to the 3rd either side, described communication paths is with respect to the axioversion setting of described cylinder barrel.
According to the washing machine damper of first aspect present invention, fluid and gas have been enclosed owing in the piston action chamber, mix, therefore, when low-frequency vibration, piston moves with piston rod is flexible, makes fluid flow through communication paths, utilizes its circulating resistance to produce damping force; When dither, utilize inflation in fluid, to produce bubble, and reduce damping force by compressed air bubble.Like this, just can produce big damping force, dither is produced little damping force low-frequency vibration.The result, when the washing that produces low-frequency vibration, rinse cycle or dehydration starting, can suppress rocking of cylinder by big damping force, rise to a certain degree so that produce in the dehydration of dither, can suppress vibration to the housing transmission by little damping force in the rotary speed of cylinder.
According to the washing machine damper of second aspect present invention,, therefore, can improve the seal between cylinder barrel and the piston rod because the operating chamber of the outstanding side of the piston rod in the cylinder barrel is full of fluid all the time.
According to the washing machine damper of third aspect present invention, under the state that is installed between tank and the housing, in the predetermined stroke scope of piston rod, owing to piston is immersed in the fluid always, so can obtain stable damping force.
According to the present invention the 4th or the washing machine damper of eight aspect, owing in 60 seconds, recovers, so can guarantee to be recovered before entering next rinse cycle (low-frequency vibration) because of the damping force of washing process dehydration (dither) reduction afterwards by the damping force that inflation reduces.
The washing machine damper of the 5th or the 9th aspect according to the present invention, minimizing can obtain stable damping force and repulsion because of the timeliness of the air pressure of the action generation of damper changes.
The washing machine damper of the 6th or the tenth aspect according to the present invention can suitably be adjusted damping force by the damping force guiding mechanism according to operating state.
The washing machine damper of the 7th or the tenth one side according to the present invention tilts by making communication paths, can increase the generation of inflation, sets the frequency characteristic of damping force.
Description of drawings
Fig. 1 is the profilograph of the washing machine damper of first embodiment of the invention;
Fig. 2 is the schematic diagram that the tumbling-box washing machine of washing machine damper shown in Figure 1 is installed;
Fig. 3 is illustrated in the washing machine damper shown in Figure 1, the chart of the relation of the vanishing state of the bubble that the flow path area of throttling path and inflation produce;
Fig. 4 is the curve map that the timeliness of the gas pressure of expression washing machine damper shown in Figure 1 changes;
Fig. 5 is the profilograph of the washing machine damper of second embodiment of the invention;
Fig. 6 is the enlarged drawing of the major part of the state that opens the sluices in the expression washing machine damper shown in Figure 5;
Fig. 7 is the plane of piston of the washing machine damper of third embodiment of the invention;
Fig. 8 is the A-A profile of piston shown in Figure 7.
The specific embodiment
Below, with reference to the accompanying drawings embodiments of the invention are elaborated.
Referring to figs. 1 through Fig. 4 the first embodiment of the present invention is described.
As shown in Figure 1, the washing machine damper 1 of present embodiment is embedded with piston 3 slidably in round-ended cylinder shape cylinder barrel 2 is arranged, and by this piston 3 cylinder barrel 2 is divided into two chambers of chamber 2B (piston action chamber) under chamber 2A on the cylinder barrel (piston action chamber) and the cylinder barrel.One end of piston rod 4 is connected with piston 3, and the other end of piston rod 4 is inserted the logical piston rod guide 5 that is installed on cylinder barrel 2 peristomes and oil sealing 6 and stretched out to the outside, and oil sealing 6 will sealing between cylinder barrel 2 and the piston rod 4, and cylinder barrel 2 is sealed.(in the piston action chamber) hybrid package has fluid and gas in the cylinder barrel 2, and piston 3 is immersed in the fluid, on the border of fluid and gas separators such as free-piston is not set.In piston 3, be provided with the throttling path 7 (communication paths) that cylinder barrel is communicated with between chamber 2A, the 2B up and down.
In the open side end of cylinder barrel 2 and the front end of piston rod 4, mounting spring seat 8,9 is equipped with helical spring 10 between these spring bases 8,9 respectively.In the bottom of cylinder barrel 2 and the front end of piston rod 4 be provided with the installation portion 11,12 of threaded portion 11A, 12A respectively.
Below, the mounting structure that explanation is installed washing machine damper 1 to washing machine 13 (tumbling-box washing machine) with reference to Fig. 2.Schematically illustrate as Fig. 2, washing machine 13 is drum-type automatic washing machines, having rotating shaft and the input horizontal with respect to ground (face is set) has the cylinder 14 of washings to be rotatably supported in the cylindric tank 15, driven by the motor (not shown), tank 15 is suspended in the rectangular case 16 that forms washing machine 13 exterior contours by washing machine damper 1 and spring 17.Each process such as plumbing, washing, rinsing and dehydration of suitably carrying out are washed.In washing machine damper 1, make on cylinder barrel 2 side direction, make under the outstanding side direction of piston rod 4, respectively by (not shown) such as rubber bushings, the installation portion 11 of cylinder barrel 2 sides and tank 15 are linked, the installation portion 12 of piston rod 4 sides and housing 16 are linked.Like this, chamber 2B is full of fluid under the cylinder barrel, seals reliably by oil sealing 6, and chamber 2A is full of fluid and gas on the cylinder barrel.In addition, in cylinder barrel 2, encapsulated enough fluid, so that in the actuating length scope (actuating range of piston during washing machine 13 runnings) of piston shown in Figure 13, piston 3 is moving under the casual state that steeps in fluid all the time.
Effect to present embodiment with said structure describes below.
Washing machine damper 1 by being provided with helical spring 10 and spring 17 in housings 16, absorb tank 15 elastic bearings also to suppress the vibration that produced by cylinder 14 rotations.In washing machine damper 1, piston 3 moves with the flexible of piston rod 4, thereby makes fluid flow through throttling path 7 between chamber 2A, the 2B up and down at cylinder barrel, and produces damping force by circulating resistance.At this moment, when the flexible stroke of piston rod 4 is in low-frequency vibration, can not produce inflation, can produce big damping force according to the flow path area of throttling path 7, when being in dither, the flow velocity that flows through the fluid of throttling path 7 accelerates and produces inflation, compresses and reduces damping force by inflating bubble in the fluid that produces.Like this, in the rotary speed that reduces cylinder 14 and produce the washing of the big low-frequency vibration of amplitude and during the starting of rinse cycle or dehydration, produce big damping force, suppress rocking of tank 15; Rise in the dehydration of the dither that to a certain degree produces little amplitude in cylinder 14 rotary speeies, produce little damping force, absorb the vibration of tank 15 and make it not be delivered to housing 16.Like this, for dither, by promoting to produce inflation, can adjust damping force, thereby can absorb, suppress the vibration that cylinder 14 rotates the tank 15 that is produced effectively, and reduce the generation of vibration and noise according to each process.
Below, the flow path area of the throttling path 7 of piston 3 is described with reference to Fig. 3.In washing machine damper 1, when the stroke of piston rod 4 from dither during to the low-frequency vibration transition, the bubble that inflation produces is by gas side come-up and the disappearance of throttling path 7 chamber 2A on cylinder barrel.At this moment, when the dehydration after washing process (dither) enters feedwater, rinse cycle, bubble was disappeared within 60 seconds, and make damping force recover (becoming the state before inflation takes place).The extinction time of bubble depends on the flow path area of throttling path 7, the relation of the vanishing state of the flow path area of expression throttling path 7 and bubble among Fig. 3.As shown in Figure 3, in order fully to shorten the extinction time of bubble, flow path area that can envoy's circulation flow path 7 is more than or equal to 0.2mm
2On the other hand, because damping force depends on the flow path area of throttling path 7, therefore, in order to obtain enough damping forces when the low-frequency vibration, the flow path area of throttling path 7 can not be excessive.
Below, the pressure of enclosing the gas in the cylinder barrel 2 is described with reference to Fig. 4.In common hydraulic damper, obtain stable damping force in order to prevent to inflate, be grease chamber and gas compartment by free-piston with the cylinder barrel internal separation, in gas compartment, enclose gases at high pressure.In the present invention, for dither, reduced damping force owing to producing inflation energetically, therefore, free-piston has not been set, the pressure of enclosing the gas in the cylinder barrel is set at reduction to a certain degree.Fig. 4 has represented that the inclosure gas pressure in cylinder barrel 2 in the washing machine damper 1 is 4kgf/cm
2(referring to the action frequency of curve piston rod 4 a) and during atmospheric pressure (referring to curve b) with enclose variation of gas pressure.As shown in Figure 4, when having enclosed 4kgf/cm
2Gas the time, gas leaks gradually, and under atmospheric situation, then produces the effect of pump, gas pressure rises gradually, in either case, at action frequency near 10 * 10
6During the inferior left and right sides, all can be with 2kgf/cm
2Realize poised state.Therefore, be 1～3kgf/cm by under original state, enclosing pressure
2, be preferably 2kgf/cm
2About gas, the initial gas pressure that can make the washing machine damper 1 that has just produced is identical substantially with gas pressure value after washing machine damper 1 repeats repeatedly to work, as a result, the timeliness that can reduce gas pressure changes, and obtains stable damping force and repulsion.
Below, with reference to Fig. 5 and Fig. 6 the 2nd embodiment of the present invention is described.In the following description, used identical label for the part identical, so only different piece is elaborated with the washing machine damper 1 of above-mentioned the 1st embodiment.
As Fig. 5 and shown in Figure 6, in the washing machine damper 18 of present embodiment, on piston 3, be provided with damping force guiding mechanism 19.Damping force guiding mechanism 19 utilizes gate 21 to open and close the connection cylinder barrel secondary path 20 (communication paths) between chamber 2A, the 2B up and down.One end of the pin 22 in gate 21 and the piston rod 4 of inserting logical hollow slidably is connected, the other end that makes pin 22 be built in the solenoid driver 23 of piston rod 4 in the end that stretch out cylinder barrel 2 outsides and be connected.Seal by oil sealing 24 between pin 22 and the piston rod 4.Usually, to closing the pressured gate 21 of valve position, switching on by lead 26 makes solenoid driver 23 actions, presses pad 22, as shown in Figure 6, gate 21 is separated with piston 3, and secondary path 20 is opened by spring 25.
By above structure, usually, because secondary path 20 is closed by gate 21, therefore, fluid flows and the generation damping force at throttling path 7, opens the sluices 21 if make solenoid driver 23 actions, then fluid flows through at secondary path 20, thereby make the cylinder barrel increase of the flow path area between chamber 2A, the 2B up and down, therefore, can reduce damping force.Like this, can adjust the damping force of washing machine damper 18, can wait according to the vibration frequency of the rotary speed of each processes such as the washing of washing machine 13, rinsing, dehydration and cylinder 14, tank 15 like this and adjust damping force, thereby can set optimal damping power, thereby reduce vibration and generating noise effectively according to the operating condition of washing machine 13.
In above-mentioned second embodiment, as an example, though the damping force guiding mechanism 19 that gate 21 is opened and closed to the advance and retreat action by pin 22 is illustrated, but, the damping force guiding mechanism is not limited thereto, also can realize opening and closing, and also can adjust flow path area continuously by rotation.
Below, Fig. 7 is described to the 3rd embodiment shown in Figure 8.
In the 3rd embodiment, make the axioversion of the throttling path 7 of the piston 3 shown in above-mentioned first and second embodiment by cylinder barrel 2.
Throttling path 37 is made of the hole that is obliquely installed to the tangential direction of piston 33 (among the figure on the A-A cross section), is provided with two throttling paths 37 that tilt in the opposite direction each other in the present embodiment.
By this structure, when fluid flows between chamber 2A, the 2B about cylinder barrel by throttling path 37, in the chamber in downstream, can produce circumferential eddy currents, thereby be easy to inflate.By any adjustment angle of inclination or direction, can change the frequency that produces inflation, the result can adjust the frequency characteristic of damping force.
In above-mentioned first to the 3rd embodiment, although understand and to be provided with single cylinder barrel, be so-called monotubular formula washing machine damper 1, but the invention is not restricted to this special case that it also is applicable to the so-called double-cylinder type damper that is provided with as the urceolus in the inner core of cylinder barrel of the present invention and the outside thereof.
Claims (10)
1. washing machine damper, it is installed between the tank and housing that holds washing machine drum, it is characterized in that, comprising: cylinder barrel, it is provided with the piston action chamber that piston of connecting piston rod moves; Communication paths, it is arranged in the described piston and is communicated with two indoor chambers of described piston action of being divided by above-mentioned piston, hybrid package has fluid and gas in described piston action chamber, under the state that described washing machine damper is installed between described tank and the described housing, in the actuating length scope of described piston, the amount of described fluid is enough to make described piston to be immersed in this fluid.
2. washing machine damper according to claim 1 is characterized in that, described cylinder barrel is installed between described tank and the described housing, so that under the outstanding side direction of the described piston rod of described cylinder barrel.
3. washing machine damper according to claim 1 and 2, it is characterized in that, the size of the flow path area of described communication paths is: the bubble that produces in the chamber by the described piston underside of inflation in described cylinder barrel is by described communication paths, within 60 seconds, the bubble collapse of following side cavity.
4. washing machine damper according to claim 1 and 2 is characterized in that, the gas pressure of enclosing in described cylinder barrel is 1～3kgf/cm
2
5. washing machine damper according to claim 1 and 2 is characterized in that, is provided with the damping force guiding mechanism of the flow path area of adjusting described communication paths.
6. washing machine damper according to claim 1 and 2 is characterized in that the axioversion of described relatively cylinder barrel is provided with described communication paths.
7. washing machine damper according to claim 1, it is characterized in that, the size of the flow path area of described communication paths is: by the bubble that produces in the chamber of described piston underside of inflation in described cylinder barrel by described communication paths, within 60 seconds, the bubble collapse in the following side cavity.
8. washing machine damper according to claim 1 is characterized in that, the gas pressure of enclosing in described cylinder barrel is 1～3kgf/cm
2
9. washing machine damper according to claim 1 is characterized in that, is provided with the damping force guiding mechanism of the flow path area of adjusting described communication paths.
10. washing machine damper according to claim 4 is characterized in that the axioversion of described relatively cylinder barrel is provided with described communication paths.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004200423A JP4403502B2 (en) | 2003-07-31 | 2004-07-07 | Damper for washing machine and washing machine |
| JP200423/04 | 2004-07-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1718902A CN1718902A (en) | 2006-01-11 |
| CN100532685C true CN100532685C (en) | 2009-08-26 |
Family
ID=35930840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100762133A Expired - Fee Related CN100532685C (en) | 2004-07-07 | 2005-02-17 | Washing machine damper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100532685C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307033A (en) * | 2017-07-28 | 2019-02-05 | 青岛海尔滚筒洗衣机有限公司 | Damper and device for clothing processing including the damper |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4357523B2 (en) * | 2006-11-21 | 2009-11-04 | 株式会社日立製作所 | Drum washing machine |
| JP5773805B2 (en) * | 2011-08-30 | 2015-09-02 | 株式会社東芝 | Washing machine |
| CN108130684B (en) * | 2016-11-30 | 2021-07-09 | 青岛胶南海尔洗衣机有限公司 | Washing machine inner and outer barrel horizontal adjusting system and method and washing machine |
| CN108662068B (en) * | 2017-03-27 | 2021-06-11 | 重庆海尔洗衣机有限公司 | Damper and washing machine including the same |
| CN108662070B (en) * | 2017-03-27 | 2021-03-12 | 青岛海尔滚筒洗衣机有限公司 | Damping system and washing machine including the same |
| CN108660686B (en) * | 2017-03-27 | 2021-05-25 | 青岛胶南海尔洗衣机有限公司 | Damper and washing machine including the same |
-
2005
- 2005-02-17 CN CNB2005100762133A patent/CN100532685C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109307033A (en) * | 2017-07-28 | 2019-02-05 | 青岛海尔滚筒洗衣机有限公司 | Damper and device for clothing processing including the damper |
| CN109307033B (en) * | 2017-07-28 | 2021-07-23 | 青岛海尔洗涤电器有限公司 | Damper for laundry treating apparatus and laundry treating apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1718902A (en) | 2006-01-11 |
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