CN102102723A - Fluid variable damping shock absorber and washing machine equipped with same - Google Patents
Fluid variable damping shock absorber and washing machine equipped with same Download PDFInfo
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- CN102102723A CN102102723A CN2011100426956A CN201110042695A CN102102723A CN 102102723 A CN102102723 A CN 102102723A CN 2011100426956 A CN2011100426956 A CN 2011100426956A CN 201110042695 A CN201110042695 A CN 201110042695A CN 102102723 A CN102102723 A CN 102102723A
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Abstract
The invention discloses a fluid variable damping shock absorber comprising a shock absorber cylinder shell, a piston rod and a piston, wherein the shock absorber cylinder shell is composed of a damping chamber and a cushion chamber; the piston rod is inserted in the cylinder shell; the piston is fixedly arranged on the piston rod of the damping chamber; the cushion chamber is communicated with the outside world; a damping medium is loaded in the damping chamber; and a fluid channel used for the circulation of the damping medium is arranged in the piston. According to the shock absorber, two groups of one-way valves with opposite directions and unequal quantities are arranged on the piston; when the shock absorber motions toward different directions, only one group of one-way valves which are maintained in a same direction can open; and different damping of the shock absorber can be produced in reciprocating motion by utilizing the throttling action of the one-way valves on the damping medium with different flow directions. More particularly, the shock absorber provided by the invention can be in an undamped state during high-frequency shock; therefore, the resonance of a housing of a washing machine can be greatly weakened during the high-speed running of the washing machine, which is more beneficial to maintaining the stabilization of the washing machine and protecting the washing machine. The fluid variable damping shock absorber has a simple structure and a remarkable effect and is suitable for popularizing and using.
Description
Technical field
The present invention relates to a kind of vibration damper, particularly a kind of fluid damping changing impact damper and the washing machine of this vibration damper is housed.
Background technique
Existing tumbling-box washing machine comprises the shell that forms outward appearance; Be arranged on the washing tub that is used to deposit wash water in this shell; Be arranged in this washing tub and be used for clothing is washed cylinder with dehydrating operations in rotatable mode; Be arranged on the back of this washing tub and be connected in the drive motor of the running shaft of cylinder.Can be rotatably set in the front surface of shell by its door that clothing is put into or taken out, and the support that is used for the rotating shaft of back-up roller is arranged on the back of washing tub.Spring is fixed on shell on the top of washing tub, and the vibration damper that is delivered to the vibration of washing tub by cylinder of being used to decay is arranged on the bottom of washing tub.
Fig. 1 is the longitudinal sectional view that illustrates according to the vibration damper of the tumbling-box washing machine of prior art.As shown in the figure, existing vibration damper 20 comprises the cylinder 21 that is fixed on shell 11 and has receiver portion 21a; Be fixed in washing tub 12 and be arranged to insert the receiver portion 21a of this cylinder 21 or from its rod-like element of separating 22; And be connected in the external peripheral surface of this rod-like element 22 and the damping piece 23 that contacts with the friction surface 21b of this cylinder 21.
The work of existing vibration damper will be described below.
When washing operation, owing to the vibration that is passed to washing tub by cylinder applies power downwards to rod-like element 22.At this moment, damping piece 23 contacts with the friction surface 21b of cylinder 21, therefore produces frictional force, is delivered to the vibration of washing tub so rod-like element 22 moves gradually thereby decays.Be delivered to the vibration of washing tub 12 in order to decay, vibration damper 23 must have and is constructed with enough frictional force.Yet in the vibration damper of existing tumbling-box washing machine, the Oscillation Amplitude that when normal dehydrating operations and excessively produces during dehydrating operations under actual laundering operation is very different, thereby is decaying significantly effectively and be restricted during vibration by a small margin.In the vibration damper of existing tumbling-box washing machine, the frictional force of vibration damping is constant in all time basically, can't realize the variation and the adjustment of damping, because constant damping in the to-and-fro motion, make the damping force can not be too big, otherwise can pull the washing machine shell motion, significantly the energy of absorbing vibration.Urceolus is excessive to bottom offset simultaneously, can cause spring tension to strengthen again, the increase of boosting vibrations.
Those skilled in the art will know that, be to need to strengthen damping when vibration damper moves downward, to eliminate amplitude, reduce pendulum spring because of the bigger pulling force of the excessive generation of displacement, the damping that moves downward increasing can be delivered to ground by the lower margin of washing machine shell, increase the frictional force on lower margin and ground simultaneously, this damped type is of value to the machine smooth running, can increase.And vibration damper is when moving upward, and then needs to reduce the urceolus of damping in preventing to shake and pulls the washing machine shell vibrations.Simultaneously, because downward damping strengthens, displacement reduces, and spring tension is also less, can produce less displacement when outer barrel assembly moves upward, and the shock-absorbing process of vibration damper is mainly finished when descending.Thereby machine is moved more stably.
In view of this, special proposition the present invention.
Summary of the invention
First purpose of the present invention is to provide a kind of fluid damping changing impact damper, for realizing goal of the invention, adopts following technological scheme:
A kind of fluid damping changing impact damper comprises: the vibration damper cylindrical shell of being made up of damping cavity and buffer cavity; Insert the piston rod in the cylindrical shell; Be fixedly installed on the piston on the damping cavity inner piston rod, described buffer cavity communicates with the external world; In the described damping cavity resisting medium is housed, being provided with in the piston can be for the fluid passage of resisting medium circulation, described vibration damper utilizes one-way valve the throttling action of resisting medium to be realized the variation of vibration damper damping by being arranged on the switch of the one-way valve control fluid passage on the piston.
Two groups of one-way valves that the opposite quantity of direction that comprises described one-way valve does not wait, when vibration damper moves toward different direction, can only keep one group of one-way valve opens in the same way, utilize one-way valve to make vibration damper in to-and-fro motion, produce different damping to the throttling action of resisting medium various flows.
Described vibration damper cylindrical shell by one slidably dividing plate be separated into damping cavity and buffer cavity, described piston is arranged on the free end of piston rod, be provided with a spring in the buffer cavity, utilize spring the active force of dividing plate to be changed the variation of the damping cavity volume that the volume of buffer cavity and then buffering cause by vibrations.
Described vibration damper cylindrical shell is separated into damping cavity and buffer cavity by the dividing plate circle that is fixed on cylinder lateral wall and be enclosed within on the piston rod, and the free end of piston rod stretches in the buffer cavity, and this free end is to the distance of the piston height more than or equal to damping cavity; Perhaps more preferably, a spring that is enclosed within on the piston rod also is set between described dividing plate circle and piston.
Described vibration damper cylindrical shell by the damping cavity housing and be set in the damping cavity shell end outward slidably the buffer cavity housing form, form buffer cavity between damping cavity shell end and the buffer cavity housing; Be provided with damping block between buffer cavity housing and the damping cavity housing; The free end of piston rod stretches in the buffer cavity, and this free end is to the distance of the piston height more than or equal to damping cavity; Perhaps more preferably, a spring that is enclosed within on the piston rod also is set between described dividing plate circle and piston.
Described resisting medium is air or grease or water.
Be provided with seal ring between described cylindrical shell and the piston rod.
Described one-way valve is ball valve, piston valve.
Vibration damper of the prior art is commonly the to-and-fro motion constant damping, though it can play certain cushioning effect, at the vibration damper of some special-purpose, need strengthen damping at specific direction, in the opposite direction then needs to control damping.As the use in washing machine vibration damper, because in the washing machine running, the cylindrical shell of vibration damper is done linear motion up and down along piston rod.Be to need to strengthen damping when vibration damper moves downward, to eliminate amplitude, reduce pendulum spring because of the bigger pulling force of the excessive generation of displacement, the damping that moves downward increasing can be delivered to ground by the lower margin of washing machine shell, increase the frictional force on lower margin and ground simultaneously, this damped type is of value to the machine smooth running, can increase.Simultaneously, because downward damping strengthens, displacement reduces, and spring tension is also less.The shock-absorbing process of vibration damper is mainly finished when descending, by increasing damping machine is moved more stably.And vibration damper is when moving upward, and then needs to reduce the urceolus of damping in preventing to shake and pulls the washing machine shell vibrations.Therefore, existing vibration damper can't satisfy specific demand.
The present invention protects a kind of fluid damping changing impact damper, and this vibration damper comprises: the vibration damper cylindrical shell of being made up of damping cavity and buffer cavity; Insert the piston rod in the cylindrical shell; Be fixedly installed on the piston on the damping cavity piston rod, described buffer cavity communicates with the external world; In the described damping cavity resisting medium is housed, being provided with in the piston can be for the fluid passage of resisting medium circulation, described vibration damper utilizes one-way valve the throttling action of resisting medium to be realized the variation of vibration damper damping by being arranged on the switch of the one-way valve control fluid passage on the piston.
Piston is divided into chamber and following chamber with damping cavity among the present invention.Being provided with in the piston can be for the fluid passage of resisting medium circulation, and this fluid passage does not need the structure that is specific, can circulation from piston comparatively smoothly as long as satisfy resisting medium.Preferred internal piston is a hollow-core construction, in a side of piston several being set can be for circulation free flow opening, corresponding position at the opposite side of piston is provided with two groups of one-way valves that the opposite quantity of direction does not wait, when piston rod moves to different direction, can only keep one group of one-way valve opens in the same way, utilize not one-way valve in the same way to make piston rod in to-and-fro motion, produce different damping the different throttling action of resisting medium.In addition, one-way valve not only is confined to the mode of execution that homonymy is provided with, also in the same way one-way valve not can be arranged on the both sides of piston, what adapt also can be arranged on both sides for the opening of resisting medium free flow, and those skilled in the art can adjust the position that is provided with of one-way valve and opening in conjunction with concrete condition.Because rightabout one-way valve quantity does not wait, therefore, vibration damper just can produce the damping of different sizes when different direction moves, and utilizes one-way valve the throttling action of resisting medium to be realized the change damping function of vibration damper.And when vibration damper was in the high frequency vibrations, therefore all one-way valves can't closedly all be in open mode under effect of inertia, and the fluid passage in the piston remains unimpeded, but the resisting medium free flow, and vibration damper is in the undamped state.It should be noted that vibration damper is when high frequency shakes among the present invention, system is not the real undamped perfect condition that realized, just infinitely near undamped, simultaneously, the quantity of one-way valve is many more on the piston, and the circulation of resisting medium is unimpeded more just to make vibration damper be in the undamped state more.
" resisting medium " among the present invention is air or grease or water, but is not limited to aforesaid way, and any free flowable resisting medium can be as the resisting medium among the present invention in the prior art.
More specifically, vibration damper of the present invention mainly comprises three kinds of mode of executions:
Scheme one: as shown in Figure 2, the vibration damper cylindrical shell by one slidably dividing plate be separated into damping cavity and buffer cavity, piston is arranged on the free end of piston rod, because vibration damper pumps during vibrations, the length of piston rod in cylindrical shell changes and causes cylindrical shell internal volume generation respective change, and resisting medium can't circulate in damping cavity.In view of this, the inventor is provided with a spring in buffer cavity, and the two ends of spring are separately fixed at the end of dividing plate and buffering cavity shell, utilizes spring action to change the variation of the damping cavity volume that the volume of buffer cavity and then buffering cause by vibrations in the elastic force of dividing plate.Concrete as Fig. 2, state with vibration damper when static is reference, when vibrations generation vibration damper moves downward, the part that piston rod stretches in the damping cavity is elongated, the volume of damping cavity has relatively just diminished, and this moment, the elastic force pulling dividing plate of spring moved upward, and increased the volume of damping cavity adaptably by the volume that reduces buffer cavity, the volume that buffer cavity reduces stretches into the volume of part piston rod in the damping cavity when being vibrations, thereby keeps the constant of damping cavity volume.When vibrations generation vibration damper moves upward, the length of piston rod in damping cavity shortens, the volume of damping cavity has increased relatively, spring promotion this moment dividing plate moves downward, come adaptably the balance damping cavity to keep the constant of damping cavity volume by the volume that increases buffer cavity because piston rod moves the volume-variation that is caused.In addition, this buffer cavity does not exert an influence to the damping of vibration damper.In the vibrations process, utilize one-way valve on the piston that the throttling action of resisting medium is realized damping change in the to-and-fro motion.
Scheme two: as shown in Figure 3, the vibration damper cylindrical shell is separated into damping cavity and buffer cavity by the dividing plate circle that is fixed on cylinder lateral wall and be enclosed within on the piston rod, and the free end of piston rod stretches in the buffer cavity, and this free end is to the distance of the piston height more than or equal to damping cavity.Guaranteeing when vibrations take place no matter vibration damper up moves or down motion, the length of damping cavity inner piston rod and be invariable, it is constant therefore can to keep the interior volume of damping cavity.Because the piston rod free end is to the distance of the piston height more than or equal to damping cavity, even piston is depressed into the bottommost of damping cavity in the vibrations process, the free end that still can keep piston rod in buffer cell or with dividing plate circle same level, thereby it is constant to keep the damping cavity internal volume.In the vibrations process, utilize one-way valve on the piston that the throttling action of resisting medium is realized damping conversion in the to-and-fro motion.
As a kind of optimal way of this scheme, the present invention also is being provided with a spring that is enclosed within on the piston rod between described dividing plate circle and piston, and the two ends of spring are separately fixed on dividing plate circle and the piston.When the stressed excessive or washing machine of vibration damper remained static, this spring can be alleviated the pulling force that hangs spring, avoids piston directly to withstand on the dividing plate circle, also helped the to-and-fro motion of vibration damper simultaneously.
When vibrations generation vibration damper moves downward, the buffer cavity housing moves downward, utilize the frictional force that damping block produces between buffer cavity housing and the damping cavity housing, promoting the damping cavity housing moves downward together, because resisting medium indoor on the Buddhist nun chamber can't flow out by a small amount of one-way valve at short notice, indoor resisting medium can produce bigger pressure on this moment, the corresponding increasing of the damping force that damping cavity moves downward; When damping force during even as big as the frictional force that overcomes damping block and produce, the buffer cavity housing will produce relative movement with the damping cavity housing, and the damping force of this moment reaches maximum value, is the damping force that damping block produces.When the buffer cavity housing moves upward, the frictional force that can utilize damping block to produce promotes the damping cavity housing and moves upward together, because resisting medium indoor under the damping cavity can't flow out (because flow direction one-way valve quantity up is more than the one-way valve that flows to down by one-way valve at short notice, therefore, resistance herein is little when moving downward than the buffer cavity housing), this indoor at present resisting medium can produce certain pressure equally.When damping force during even as big as the frictional force that overcomes damping block and produce, the buffer cavity housing will produce relative movement with the damping cavity housing, and the damping force of this moment reaches maximum value, is the damping force that damping block produces.
Because free end is to the distance of the piston height more than or equal to damping cavity, therefore when vibrations took place, no matter vibration damper up moved or down motion, the length of damping cavity inner piston rod and be invariable, and it is constant also just to keep the interior volume of damping cavity.In the vibrations process, utilize one-way valve on the piston that the throttling action of resisting medium is realized damping change in the to-and-fro motion.
During high-frequency vibration, all one-way valves all are in open mode under effect of inertia, but resisting medium free flow, the damping force of piston in damping cavity becomes very little, and the frictional force that damping block produces can not change, because the damping cavity housing can't overcome the frictional force that damping block produces, thus relative static between buffer cavity housing and the damping block.During high-frequency vibration, vibration damper can be realized the undamped state equally.
When washing machine is idle, the vibration damper cylindrical shell is followed the washing machine outer barrel assembly, resisting medium in the damping cavity can all flow in the cavity of resorption, and the upper end portion of piston and damping cavity was adjacent to and promoted the damping cavity housing upwards this moment, produced frictional force with the buffer cavity housing.
Among the present invention, the structure of damping block can be according to the range of movement and the damping force size specific design of moving element in the application of reality, and this those skilled in the art of being designed to are familiar with.
As a kind of optimal way of this scheme, the present invention also is provided with a spring that is enclosed within on the piston rod between described dividing plate circle and piston, and the two ends of spring are separately fixed on dividing plate circle and the piston.When the stressed excessive or washing machine of vibration damper remained static, this spring can be alleviated the pulling force that hangs spring, avoids piston directly to withstand on the dividing plate circle, also helped the to-and-fro motion of vibration damper simultaneously.
In order to guarantee the sealing between cylindrical shell and the piston rod, guarantee that the resisting medium in the tube does not ooze out in tube, between cylindrical shell and piston rod, seal ring is set, the selecting for use to those skilled in the art are familiar with of sealing circle understood easily and realized.In addition, in the scheme three, also be provided with seal ring between piston and the damping cavity housing.
One-way valve among the present invention is meant and flows to the valve that requires, and belongs to a kind of automatic valve, and it mainly acts on is to prevent that medium from flowing backwards; Only flowing toward a specific direction at resisting medium and just can open, is that the power of the mobile generation of tube road medium itself opens and closes automatically, ball valve, piston valve as shown in Fig. 2,3.One-way valve can adopt anyly in the prior art can realize one-way valve structures of the present invention, and those skilled in the art can be selected in conjunction with the professional general knowledge of self as the case may be.
Second purpose of the present invention is to provide a kind of washing machine of vibration damper as mentioned above that is equipped with, and specifically adopts following technological scheme:
A kind of washing machine that above-mentioned vibration damper is housed.
On the piston control flows to down one-way valve quantity less than the one-way valve quantity that flows to up, when vibration damper is moved downward (the relative piston rod of cylindrical shell this moment moves downward), resisting medium flows into down chamber by one-way valve by last chamber with bigger resistance, produces big damping; When vibration damper moved upward, resisting medium was flowed into by following chamber by more one-way valve with less resistance and goes up the chamber, produces than slight drag; When vibration damper was in the high frequency vibrations, two groups of one-way valves were opened under effect of inertia simultaneously, and vibration damper is in the undamped state.
One-way valve and control resisting medium that described control resisting medium flows to up flowed to that the quantity ratio is 1＜k≤4 between down the one-way valve, as 4: 1,4: 3,5: 3 etc.
One-way valve and control resisting medium that described control resisting medium flows to up flowed to that the quantity ratio is 1.5≤k≤3 between down the one-way valve, as 10: 4,5: 2,6: 3,3: 1 etc.
One-way valve and control resisting medium that described control resisting medium flows to up flowed to that quantity is 2 than k between down the one-way valve, as 4: 2,2: 1.
Claimed washing machine is equipped with above-mentioned vibration damper among the present invention.Those skilled in the art will know that, be to need to strengthen damping when washing machine vibration absorber moves downward, to eliminate amplitude, reduce pendulum spring because of the bigger pulling force of the excessive generation of displacement, the damping that moves downward increasing can be delivered to ground by the lower margin of washing machine shell, increase the frictional force on lower margin and ground simultaneously, this damped type is of value to the machine smooth running, can increase.Simultaneously, because downward damping strengthens, displacement reduces, and spring tension is also less.The shock-absorbing process of vibration damper is mainly finished when descending, by increasing damping machine is moved more stably.And vibration damper is when moving upward, and then needs to reduce the urceolus of damping in preventing to shake and pulls the washing machine shell vibrations.Therefore, the present invention in the fluid damping changing impact damper, set the control resisting medium from the chamber flow under the one-way valve quantity of chamber be less than the one-way valve of control resisting medium from chamber on the chamber flows to down, as shown in Figure 2, control flows is 1 to one-way valve down, and control flows is 2 to one-way valve up.Therefore, when vibration damper down moved, the resisting medium on the damping cavity in the chamber was subjected to the extruding of piston, make resisting medium from only 1 one-way valve with bigger drag stream chamber under damping cavity, the damping of vibration damper increases; When vibration damper up moved, the resisting medium under the damping cavity in the chamber was subjected to the extruding of piston, made resisting medium flow to chamber on the damping cavity by 2 one-way valves with less resistance, relative minimizing damping.And when vibration damper was in the high frequency vibrations, 3 one-way valves were opened under effect of inertia simultaneously, and the fluid passage in the piston remains unimpeded, but the resisting medium free flow, and vibration damper is in the undamped state.
The present invention has done further research to the quantity of one-way valve, big in order to make vibration damper regulate the amplitude of damping, the inventor finally thinks after a large amount of experiments, when the control resisting medium flows to up one-way valve and control resisting medium when to flow between down the one-way valve quantity ratio be 1＜k≤4, can obtain to become comparatively significantly damping, preferred 1.5≤k≤3, more preferably k is 2.As to control the one-way valve that resisting medium flows to up be 2 or 4, and the one-way valve that the control corresponding resisting medium flows to down is 1 or 2, can reach better change damping.
Adopt technique scheme; the present invention is than the advantage of prior art: fluid damping changing impact damper simple in structure; but can change the size of damping targetedly according to shock attenuation needs; fluid damping changing impact damper of the present invention is preferred for washing machine; but be not limited to washing machine; can also be applicable to that other need obtain in the structure of different damping according to the moving direction difference of piston; as reciprocating engine; air compressor; tamping machines etc. are the work system of vibrations back and forth; more particularly; vibration damper of the present invention can also be in the undamped state when high frequency shakes; weakened the resonance of washing machine shell when washing machine runs up greatly; more help keeping the stable of washing machine, the protection washing machine.The present invention is simple in structure, and effect is remarkable, suitable promoting the use of.
Description of drawings
The longitudinal sectional view of the vibration damper of Fig. 1 prior art tumbling-box washing machine
The longitudinal sectional view of Fig. 2 fluid damping changing impact damper of the present invention
The longitudinal sectional view of Fig. 3 fluid damping changing impact damper of the present invention
The longitudinal sectional view of Fig. 4 fluid damping changing impact damper of the present invention
The longitudinal sectional view of Fig. 5 fluid damping changing impact damper of the present invention
The primary component explanation
1 cylindrical shell, 2 buffer cavitys, 3 damping cavity, 4 piston rods, 5 pistons, 6 one-way valves, 7 seal rings, 8 dividing plate circles, 9 dividing plates, 10 springs, 11 buffer cavity housings, 12 damping cavity housings, 13 damping blocks, 14 springs
Embodiment
Below in conjunction with embodiment the present invention is described in more detail.
Fluid damping changing impact damper as shown in Figure 2, this vibration damper comprises: the vibration damper cylindrical shell of being made up of damping cavity 3 and buffer cavity 21; Insert the piston rod 4 in the cylindrical shell 1; Be fixedly installed on the piston 5 on the damping cavity piston rod 4, be provided with in the buffer cavity 2 and the extraneous through hole that communicates; In the damping cavity 3 water is housed, is provided with the fluid passage of the circulation of can supplying water in the piston 5.Vibration damper utilizes the variation of the throttling action realization vibration damper damping of 6 pairs of water of one-way valve by being arranged on the switch of the one-way valve 6 control fluid passages on the piston 5.
Vibration damper cylindrical shell 1 by one slidably dividing plate 9 be separated into damping cavity 3 and buffer cavity 2, piston 5 is arranged on the free end of piston rod 4.One spring 10 is set in the buffer cavity 2, utilizes the active force of 10 pairs of dividing plates 9 of spring to change the variation of damping cavity 3 volumes that the volume of buffer cavity 2 and then buffering cause by vibrations.
Piston 5 is divided into chamber and following chamber with damping cavity 3.Piston 5 is provided with the ball valve that two prescriptions do not wait to opposite quantity, wherein controlled water flow downwards the ball valve of (from last chamber to chamber) down be 1, the ball valve that controlled water flow makes progress is 2.When vibration damper down moved, the water on the damping cavity in the chamber was subjected to the extruding of piston 5, from only 1 ball valve with bigger drag stream chamber under damping cavity.The damping of vibration damper increases; When vibration damper moved upward, the water under the damping cavity in the chamber was subjected to the extruding of piston 5, flowed to chamber on the damping cavity by 2 ball valves with less resistance, relative minimizing damping.And when vibration damper was in the high frequency vibrations, 3 ball valves were opened under effect of inertia simultaneously, and the fluid passage in the piston 5 remains unimpeded, but the water free flow, and vibration damper is in the undamped state.
Fluid damping changing impact damper as shown in Figure 3, this vibration damper comprises: the vibration damper cylindrical shell of being made up of damping cavity 3 and buffer cavity 21; Insert the piston rod 4 in the cylindrical shell 1; Be fixedly installed on the piston 5 on the damping cavity piston rod 4, be provided with in the buffer cavity 2 and the extraneous through hole that communicates; In the damping cavity 3 oil is housed, but is provided with the fluid passage of fuel feeding circulation in the piston 5.Vibration damper utilizes the variation of the throttling action realization vibration damper damping of 6 pairs of oil of one-way valve by being arranged on the switch of the one-way valve 6 control fluid passages on the piston 5.
Vibration damper cylindrical shell 1 is separated into damping cavity 3 and buffer cavity 2 by being fixed on cylindrical shell 1 sidewall and being enclosed within dividing plate circle 8 on the piston rod 4, and the free end of piston rod 4 stretches in the buffer cavity 2, and this free end is to the distance of piston 5 height more than or equal to damping cavity 3.Guaranteeing when vibrations take place no matter vibration damper up moves or down motion, the length of damping cavity 3 inner piston rods 4 and be invariable, it is constant therefore can to keep the interior volume of damping cavity 3.
Piston 5 is divided into chamber and following chamber with damping cavity 3.Piston 5 is provided with the ball valve that two prescriptions do not wait to opposite quantity, and wherein controlling the ball valve that liquid flows to down (from last chamber to chamber) down is 1, and the ball valve that control liquid flows to is 2.When vibration damper down moved, the oil on the damping cavity in the chamber was subjected to the extruding of piston 5, from only 1 ball valve with bigger drag stream chamber under damping cavity.The damping of vibration damper increases; When vibration damper moved upward, the oil under the damping cavity in the chamber was subjected to the extruding of piston 5, flowed to chamber on the damping cavity by 2 ball valves with less resistance, relative minimizing damping.And when vibration damper was in the high frequency vibrations, 3 ball valves were opened under effect of inertia simultaneously, and the fluid passage in the piston 5 remains unimpeded, but the oil free flow, and vibration damper is in the undamped state.
Fluid damping changing impact damper as shown in Figure 4, this vibration damper comprises: the vibration damper cylindrical shell of being made up of damping cavity 3 and buffer cavity 21; Insert the piston rod 4 in the cylindrical shell 1; Be fixedly installed on the piston 5 on the damping cavity piston rod 4, be provided with in the buffer cavity 2 and the extraneous through hole that communicates; In the damping cavity 3 resisting medium is housed, being provided with in the piston 5 can be for the fluid passage of resisting medium circulation.Vibration damper utilizes the variation of the throttling action realization vibration damper damping of 6 pairs of resisting mediums of one-way valve by being arranged on the switch of the one-way valve 6 control fluid passages on the piston 5.
Vibration damper cylindrical shell 1 is by damping cavity housing 12 and be set in outside damping cavity housing 12 ends slidably buffer cavity housing 11 and form, and forms buffer cavity 2 between damping cavity housing 12 ends and the buffer cavity housing 11; Be provided with damping block 13 between buffer cavity housing 11 and the damping cavity housing 12; The free end of piston rod 4 stretches in the buffer cavity 2, and this free end is to the distance of piston 5 height more than or equal to damping cavity 3.
Be provided with seal ring between piston 5 and the damping cavity housing 12 and between damping cavity housing 12 and the piston rod 4.
When vibrations generation vibration damper moves downward, buffer cavity housing 11 moves downward, utilize the frictional force that damping block 13 produces between buffer cavity housing 11 and the damping cavity housing 12, promoting damping cavity housing 12 moves downward together, because resisting medium indoor on the damping cavity can't flow out by a small amount of one-way valve at short notice, indoor resisting medium can produce bigger pressure on this moment, the corresponding increasing of the damping force that damping cavity 3 moves downward; When damping force during even as big as the frictional force that overcomes damping block 13 and produce, buffer cavity housing 11 will produce relative movement with damping cavity housing 12, and the damping force of this moment reaches maximum value, is the damping force that damping block 13 produces.When buffer cavity housing 11 moves upward, the frictional force that can utilize damping block 13 to produce promotes damping cavity housing 12 and moves upward together, because resisting medium indoor under the damping cavity can't flow out (because flow direction one-way valve quantity up is more than the one-way valve that flows to down by one-way valve 6 at short notice, therefore, resistance herein is little when moving downward than the buffer cavity housing), this indoor at present resisting medium can produce certain pressure equally.When damping force during even as big as the frictional force that overcomes damping block 13 and produce, buffer cavity housing 11 will produce relative movement with damping cavity housing 12, and the damping force of this moment reaches maximum value, is the damping force that damping block produces.
During high-frequency vibration, all one-way valves 6 all are in open mode under effect of inertia, but resisting medium free flow, the damping force of piston 5 in damping cavity 3 becomes very little, and the frictional force that damping block 13 produces can not change, because damping cavity housing 12 can't overcome the frictional force that damping block 13 produces, thus relative static between buffer cavity housing 11 and the damping block 13.During high-frequency vibration, vibration damper can be realized the undamped state equally.
Embodiment 4-6
The washing machine of vibration damper shown in embodiment 1 is housed, compare with embodiment 1, the difference of vibration damper only is that the one-way valve 6 that the control resisting medium flows to up on the piston 5 is 4,4,5, and the one-way valve 6 that the control corresponding resisting medium flows to down is 1,3,3.
Embodiment 7-9
The washing machine of vibration damper shown in embodiment 2 is housed, compare with embodiment 2, the difference of vibration damper only is that the one-way valve 6 that the control resisting medium flows to up on the piston 5 is respectively 10,5,6, and the one-way valve 6 that the control corresponding resisting medium flows to down is 4,2,3.
Embodiment 10-12
The washing machine of vibration damper shown in embodiment 3 is housed, compare with embodiment 3, the difference of vibration damper only is that the one-way valve 6 that the control resisting medium flows to up on the piston 5 is respectively 3,4,2, and the one-way valve 6 that the control corresponding resisting medium flows to down is 1,2,1.
As shown in Figure 5, present embodiment is compared with embodiment 2, and distinctive points only is: a spring 14 that is enclosed within on the piston rod also is set between dividing plate circle 8 and piston 5, and the two ends of spring are separately fixed on dividing plate circle 8 and the piston 5.
Embodiment 14
Present embodiment is compared with embodiment 3, and distinctive points only is: a spring 14 (indicating among the figure) that is enclosed within on the piston rod also is set between dividing plate circle 8 and piston 5, and the two ends of spring are separately fixed on dividing plate circle 8 and the piston 5.
Embodiment in the foregoing description can further make up or replace; and embodiment is described the preferred embodiments of the present invention; be not that design of the present invention and scope are limited; under the prerequisite that does not break away from design philosophy of the present invention; the various changes and modifications that the professional and technical personnel makes technological scheme of the present invention in related domain all belong to protection scope of the present invention.
Claims (10)
1. fluid damping changing impact damper comprises: the vibration damper cylindrical shell of being made up of damping cavity and buffer cavity; Insert the piston rod in the cylindrical shell; Be fixedly installed on the piston on the damping cavity inner piston rod, it is characterized in that: described buffer cavity communicates with the external world; In the described damping cavity resisting medium is housed, being provided with in the piston can be for the fluid passage of resisting medium circulation, described vibration damper utilizes one-way valve the throttling action of resisting medium to be realized the variation of vibration damper damping by being arranged on the switch of the one-way valve control fluid passage on the piston.
2. vibration damper according to claim 1, it is characterized in that: described one-way valve comprises two groups of one-way valves that the opposite quantity of direction does not wait, when vibration damper moves toward different direction, can only keep one group of one-way valve opens in the same way, utilize one-way valve to make vibration damper in to-and-fro motion, produce different damping to the throttling action of resisting medium various flows.
3. vibration damper according to claim 1, it is characterized in that: described vibration damper cylindrical shell by one slidably dividing plate be separated into damping cavity and buffer cavity, described piston is arranged on the free end of piston rod, be provided with a spring in the buffer cavity, utilize spring the active force of dividing plate to be changed the variation of the damping cavity volume that the volume of buffer cavity and then buffering cause by vibrations.
4. vibration damper according to claim 1, it is characterized in that: described vibration damper cylindrical shell is separated into damping cavity and buffer cavity by the dividing plate circle that is fixed on cylinder lateral wall and be enclosed within on the piston rod, the free end of piston rod stretches in the buffer cavity, and this free end is to the distance of the piston height more than or equal to damping cavity; Perhaps more preferably, a spring that is enclosed within on the piston rod also is set between described dividing plate circle and piston.
5. vibration damper according to claim 1 is characterized in that: described vibration damper cylindrical shell by the damping cavity housing and be set in the damping cavity shell end outward slidably the buffer cavity housing form, form buffer cavity between damping cavity shell end and the buffer cavity housing; Be provided with damping block between buffer cavity housing and the damping cavity housing; The free end of piston rod stretches in the buffer cavity, and this free end is to the distance of the piston height more than or equal to damping cavity; Perhaps more preferably, a spring that is enclosed within on the piston rod also is set between described dividing plate circle and piston.
6. according to each described vibration damper of claim 1-5, it is characterized in that: described resisting medium is air or grease or water.
7. according to each described vibration damper of claim 1-5, it is characterized in that: be provided with seal ring between described cylindrical shell and the piston rod.
8. according to each described vibration damper of claim 1-5, it is characterized in that: described one-way valve is ball valve, piston valve.
9. washing machine that is equipped with as claim 1-5 vibration damper as described in each.
10. washing machine according to claim 9, it is characterized in that: on the piston control flows to down one-way valve quantity less than the one-way valve quantity that flows to up, when vibration damper down moved, resisting medium flowed into down chamber by one-way valve by last chamber with bigger resistance, produces big damping; When vibration damper up moved, resisting medium was flowed into by following chamber by more one-way valve with less resistance and goes up the chamber, produces less damping; When vibration damper was in the high frequency vibrations, two groups of one-way valves were opened under effect of inertia simultaneously, and vibration damper is in the undamped state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110042695.6A CN102102723B (en) | 2011-02-21 | A kind of fluid damping changing impact damper and the washing machine equipped with this amortisseur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110042695.6A CN102102723B (en) | 2011-02-21 | A kind of fluid damping changing impact damper and the washing machine equipped with this amortisseur |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102102723A true CN102102723A (en) | 2011-06-22 |
| CN102102723B CN102102723B (en) | 2016-12-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088118A (en) * | 2014-06-24 | 2014-10-08 | 上海百强洗涤设备制造有限公司 | Inner-roller floating support structure of tunnel type washing auger |
| CN104195789A (en) * | 2014-09-02 | 2014-12-10 | 合肥荣事达三洋电器股份有限公司 | Vibration damping system of impeller full-automatic washing machine |
| CN106920324A (en) * | 2017-03-09 | 2017-07-04 | 深圳怡化电脑股份有限公司 | Transmission device, paper money door and automatic teller machine |
| CN107795628A (en) * | 2016-09-05 | 2018-03-13 | 斯塔比卢斯有限责任公司 | Spring assembly |
| CN107830097A (en) * | 2017-10-09 | 2018-03-23 | 同济大学 | A kind of one-way damper |
| WO2018177096A1 (en) * | 2017-03-27 | 2018-10-04 | 青岛海尔滚筒洗衣机有限公司 | Damping system and laundry machine comprising same |
| WO2018177097A1 (en) * | 2017-03-27 | 2018-10-04 | 青岛海尔滚筒洗衣机有限公司 | Damping system and laundry machine comprising same |
| CN108662071A (en) * | 2017-03-27 | 2018-10-16 | 青岛海尔洗衣机有限公司 | Shock mitigation system and washing machine including the shock mitigation system |
| CN108662068A (en) * | 2017-03-27 | 2018-10-16 | 青岛海尔洗衣机有限公司 | Damper and washing machine including the damper |
| CN108797003A (en) * | 2017-04-28 | 2018-11-13 | 无锡小天鹅股份有限公司 | Washing machine |
| CN112224420A (en) * | 2020-10-14 | 2021-01-15 | 航宇救生装备有限公司 | Crash-resistant seat capable of changing load and absorbing energy |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088118A (en) * | 2014-06-24 | 2014-10-08 | 上海百强洗涤设备制造有限公司 | Inner-roller floating support structure of tunnel type washing auger |
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| CN104195789A (en) * | 2014-09-02 | 2014-12-10 | 合肥荣事达三洋电器股份有限公司 | Vibration damping system of impeller full-automatic washing machine |
| CN104195789B (en) * | 2014-09-02 | 2016-08-17 | 惠而浦（中国）股份有限公司 | Vibration damping system of impeller full-automatic washing machine |
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| CN106920324A (en) * | 2017-03-09 | 2017-07-04 | 深圳怡化电脑股份有限公司 | Transmission device, paper money door and automatic teller machine |
| WO2018177097A1 (en) * | 2017-03-27 | 2018-10-04 | 青岛海尔滚筒洗衣机有限公司 | Damping system and laundry machine comprising same |
| WO2018177096A1 (en) * | 2017-03-27 | 2018-10-04 | 青岛海尔滚筒洗衣机有限公司 | Damping system and laundry machine comprising same |
| CN108662071A (en) * | 2017-03-27 | 2018-10-16 | 青岛海尔洗衣机有限公司 | Shock mitigation system and washing machine including the shock mitigation system |
| CN108662068A (en) * | 2017-03-27 | 2018-10-16 | 青岛海尔洗衣机有限公司 | Damper and washing machine including the damper |
| CN108797003A (en) * | 2017-04-28 | 2018-11-13 | 无锡小天鹅股份有限公司 | Washing machine |
| CN107830097A (en) * | 2017-10-09 | 2018-03-23 | 同济大学 | A kind of one-way damper |
| CN112224420A (en) * | 2020-10-14 | 2021-01-15 | 航宇救生装备有限公司 | Crash-resistant seat capable of changing load and absorbing energy |
| CN112224420B (en) * | 2020-10-14 | 2023-12-05 | 航宇救生装备有限公司 | Crash-resistant seat capable of changing load and absorbing energy |
| CN117779421A (en) * | 2024-02-27 | 2024-03-29 | 山东海澳电器有限公司 | Durable oil storage type suspender |
| CN117779421B (en) * | 2024-02-27 | 2024-05-31 | 山东海澳电器有限公司 | Durable oil storage type suspender |
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Effective date of registration: 20160623 Address after: 266101 Haier Industrial Park, No. 1, Haier Road, hi tech park, Laoshan District, Shandong, China Applicant after: Qingdao Haier Washing Machine Co., Ltd. Address before: 266101 Haier Industrial Park, No. 1, Haier Road, hi tech park, Laoshan District, Shandong, China Applicant before: haier group corporation Applicant before: Qingdao Haier Washing Machine Co., Ltd. |
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