CN111853134B - Damping shock absorber, washing machine with same and control method - Google Patents
Damping shock absorber, washing machine with same and control method Download PDFInfo
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- CN111853134B CN111853134B CN201910337348.2A CN201910337348A CN111853134B CN 111853134 B CN111853134 B CN 111853134B CN 201910337348 A CN201910337348 A CN 201910337348A CN 111853134 B CN111853134 B CN 111853134B
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- 238000013016 damping Methods 0.000 title claims abstract description 106
- 230000035939 shock Effects 0.000 title claims abstract description 90
- 239000006096 absorbing agent Substances 0.000 title claims abstract description 86
- 238000005406 washing Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000000670 limiting effect Effects 0.000 claims abstract description 53
- 230000000149 penetrating effect Effects 0.000 claims abstract description 16
- 230000008569 process Effects 0.000 claims description 11
- 230000009471 action Effects 0.000 claims description 9
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3214—Constructional features of pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/3207—Constructional features
- F16F9/3221—Constructional features of piston rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/34—Special valve constructions; Shape or construction of throttling passages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
- F16F9/50—Special means providing automatic damping adjustment, i.e. self-adjustment of damping by particular sliding movements of a valve element, other than flexions or displacement of valve discs; Special means providing self-adjustment of spring characteristics
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Fluid-Damping Devices (AREA)
- Vibration Dampers (AREA)
Abstract
The invention discloses a damping shock absorber, a washing machine with the same and a control method, wherein the shock absorber comprises: a support sleeve; the movable rod is correspondingly inserted into the support sleeve and can move in a telescopic manner along the axial direction of the support sleeve; the friction strip is arranged in the supporting sleeve and is in contact with the outer wall of the movable rod; the upper side and the lower side of the friction strip along the moving direction of the movable rod are respectively provided with a limiting ring; the piston cylinder structure comprises a piston cylinder with adjustable internal pressure, and a telescopic piston rod penetrating through the piston cylinder; the end part of the piston rod penetrating out of the piston cylinder is connected with the limiting ring, and the internal pressure of the piston cylinder is adjusted, so that the limiting ring is fixed to limit the friction strip to move or the limiting ring freely moves along with the friction strip. The variable damping shock absorber is preferably used for washing machines, but not limited to the washing machines, and can also be applied to other structures which need to obtain different damping according to different motion directions of the piston, such as reciprocating vibration working systems of piston engines, air compressors and the like.
Description
Technical Field
The present invention relates to a damper, and more particularly, to a damping damper and a washing machine equipped with the same.
Background
The existing drum type washing machine includes a housing forming an external appearance; a washing drum arranged in the casing for storing washing water; a drum rotatably disposed in the washing tub and used for washing and dehydrating laundry; a driving motor disposed at the rear of the washing drum and connected to the rotation shaft of the drum. A door through which laundry is put in or taken out is rotatably provided at a front surface of the casing, and a bracket for supporting a rotation shaft of the drum is provided at a rear of the washing tub. The spring is fixed to the housing at an upper portion of the washing tub, and the damper for damping vibration transmitted from the drum to the washing tub is provided at a lower portion of the washing tub.
The existing shock absorber which is relatively mature in application is a friction strip type damping shock absorber, wherein a friction strip is arranged on a movable rod of the shock absorber, and the damping acting force is provided by utilizing the sliding friction generated by the friction strip in a fixed stroke of the shock absorber. However, when the free stroke of the friction strip is too large and the washing machine is in a low rotating speed stage, the damper may not give enough friction force; when the free stroke of the friction strip is too small and the washing machine is in a high-speed stage, the damper may still provide friction force, so that excessive vibration is transmitted to the washing machine box body. And because the free stroke of the damper is fixed, the dampers with different free strokes cannot be commonly used on washing machine equipment with different models.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
A first object of the present invention is to provide a damping shock absorber to achieve the purpose of providing a variable damping shock absorbing force. In order to realize the purpose of the invention, the following technical scheme is adopted:
a damped shock absorber, comprising: a support sleeve; the movable rod is correspondingly inserted into the supporting sleeve and can move in a telescopic way along the axial direction of the supporting sleeve; the friction strip is arranged in the supporting sleeve and is in contact with the outer wall of the movable rod; the upper side and the lower side of the friction strip along the moving direction of the movable rod are respectively provided with a limiting ring; the piston cylinder structure comprises a piston cylinder with adjustable internal pressure, and a telescopic piston rod penetrating through the piston cylinder; the end part of the piston rod penetrating out of the piston cylinder is connected with the limiting ring, and the internal pressure of the piston cylinder is adjusted, so that the limiting ring is fixed to limit the friction strip to move or the limiting ring freely moves along with the friction strip.
Further, the piston cylinder is connected with an air pump through a pipeline, the air pressure in the piston cylinder is adjusted through the air pump, and after the pressure in the piston cylinder reaches a set value, the pressure borne by the piston overcomes the friction force between the movable rod and the friction strip to keep the limiting ring static;
preferably, one end of the piston rod, which is positioned in the piston cylinder, is provided with a piston for covering the section of the piston cylinder, and the communication position of the pipeline and the piston cylinder is positioned between the piston and the penetrating position of the piston rod from the piston cylinder.
Furthermore, the upper end and the lower end of the piston cylinder respectively penetrate through a piston rod, the penetrating ends of the two piston rods are respectively provided with a piston, and the space between the two pistons and the corresponding piston rod penetrating positions is respectively connected with the same air pump through a branch pipeline, so that the air pressure at the piston positions of the two piston rods is balanced.
Furthermore, the upper and lower spacing rings are respectively connected with the piston rod penetrating ends of the corresponding piston cylinder structures, and the piston cylinders of the two piston cylinder structures are communicated with the same or corresponding air pumps through pipelines.
Furthermore, the piston cylinder is fixedly arranged on the supporting sleeve through a fixing rod, and when the pressure in the piston cylinder is at atmospheric pressure, the two limiting rings are correspondingly connected with the friction strips in the middle of the supporting sleeve respectively.
Furthermore, the piston cylinder structure also comprises a release valve which can be opened and closed and is arranged on a pipeline connected between the piston cylinder and the air pump so as to flow out the gas in the piston cylinder and reduce the pressure in the cylinder after the release valve is opened.
Furthermore, a spring is clamped between end pistons of the two piston rods in the piston cylinder, the spring is arranged along the vertical extension direction of the piston cylinder, and two ends of the spring are respectively connected with the corresponding side pistons so as to enable the friction strips to be kept at a constant position under the action of the spring when the friction strips are not moved relative to the support sleeve; preferably, when the friction strip is in a constant position, the center of the spring and the center of the friction strip moving space are in the same height section; further preferably, the spring center is fixedly connected with the piston cylinder.
Furthermore, in the telescopic moving direction of the movable rod, the moving distance of the piston in the piston cylinder is greater than that of the friction strip in the support sleeve.
Furthermore, the friction strip is of a cylindrical structure sleeved on the outer periphery of the movable rod, and the inner periphery of the cylindrical friction strip is in contact with the outer wall of the movable rod.
Furthermore, the supporting sleeve is provided with a radially protruding supporting cavity, the friction strip is correspondingly arranged in the supporting cavity, and two opposite sides of the friction strip are respectively provided with a limiting ring; the limiting ring is positioned in the supporting cavity, the inner circumference of the limiting ring is smaller than the outer circumference of the friction strip, and the outer circumference of the limiting ring is larger than the outer circumference of the friction strip, so that the limiting ring applies a blocking acting force to the friction strip, and limits or moves together.
The shock absorber in the prior art generally has constant damping for reciprocating motion, and although the shock absorber can play a certain damping role, the damping value cannot be changed in real time, so that the requirements of different working conditions generated by various loads and different dehydration processes of high speed and low speed on damping force cannot be met. Like a shock absorber for a washing machine, because the cylinder body of the shock absorber does linear motion up and down along the movable rod in the operation process of the washing machine. When the washing machine rotates at a stable high speed, the normal operation of the washing machine can be met only by providing a small damping and shock absorbing force, and the situation that the outer barrel shakes and is conducted onto the washing machine box body to cause the continuous shaking of the whole machine can be effectively avoided. When the washing machine rotates at a low speed with larger amplitude, a larger damping force needs to be provided to meet the requirement of effective damping support of the outer cylinder of the washing machine, so that the situation that the larger amplitude vibration of the outer cylinder is directly transmitted to the box body to cause the direct displacement of the whole machine is avoided.
The damping shock absorber in this application has directly overcome above-mentioned problem, has possessed following remarkable technological progress simultaneously:
1. through the arrangement, the internal pressure of the piston cylinder can be adjusted to adjust the supporting force of the friction strip, so that the aim of providing damping adjustable damping force for the movable rod of the damping shock absorber is fulfilled.
2. The limiting rings are arranged in the damping shock absorber supporting sleeve along the telescopic direction of the movable rod and on two sides of the friction strip respectively, and the limiting rings are connected with the movable rod end of the adjustable air pressure piston cylinder, so that the friction strip is kept at a relative fixed position with the supporting sleeve under the limiting action of the piston cylinder, the friction strip is further locked or freely switched in the supporting sleeve, and the aim that the damping shock absorber is provided with multiple using modes is fulfilled.
3. The piston cylinder is connected with the air pump through a pipeline, and the openable exhaust valve is arranged on the communicating pipeline, so that the air pressure in the piston cylinder can be pressurized under the action of the air pump and decompressed under the action of the exhaust valve, and the purposes of automatically adjusting the internal pressure of the piston cylinder and changing the damping force of the damping shock absorber are further achieved.
The second purpose of the present invention is to provide a washing machine equipped with the above-mentioned shock absorber, which specifically adopts the following technical scheme:
the washing machine provided with the damping shock absorber has the following specific working process:
when the outer barrel of the washing machine needs to provide a large damping acting force, the air pump injects compressed air into the piston cylinder of the damping shock absorber, so that the pressure in the piston cylinder reaches a set air pressure value, the friction strip is blocked by the limiting rings on the two sides and is in a relatively fixed state, and the damping acting force is provided for the movable rod when the movable rod generates axial telescopic displacement.
When the outer drum of the washing machine only needs small damping acting force or does not need the damping acting force, the piston cylinder of the damping shock absorber is deflated to normal pressure, the limiting ring loses the supporting acting force and is in a free state, and the friction strip moves together with the movable rod, so that when the movable rod generates axial telescopic displacement, the minimum damping acting force is not provided for the movable rod or only is provided for the movable rod.
In addition, because the air pressure value in the internal piston cylinder of the damping shock absorber can be adjusted at will, the stroke of the movable rod of the damping shock absorber can be adjusted freely, the damping shock absorber can be universal on different types of washing machines, the running stability of the washing machine when the inner cylinder rotates at high speed can be further met, and the vibration resistance of the whole machine is improved.
The third objective of the present invention is to provide a control method applied to the above washing machine, which specifically adopts the following technical solutions:
when the inner cylinder is in a low-rotation-speed stage in the dehydration process of the washing machine, controlling a deflation valve of the damping shock absorber to be in a closed state, and controlling the air pump to flow gas into the piston cylinder until the pressure in the piston cylinder reaches a set value; when the inner cylinder is in a high rotating speed stage, the air release valve of the damping shock absorber is controlled to be in an open state, the air pump stops blowing air flow into the piston cylinder, and the piston cylinder is deflated until the internal air pressure is equal to the atmospheric air.
By adopting the technical scheme, compared with the prior art, the invention has the advantages that:
the damping shock absorber is simple in structure, but can change the damping size according to the damping requirement in a targeted manner, and the damping-variable shock absorber is preferably used for a washing machine, is not limited to the washing machine, and can also be applied to other structures which need to obtain different damping according to different motion directions of a piston, such as reciprocating vibration working systems of piston engines, air compressors, tamping machines and the like. More particularly, the damper of the invention can also automatically adjust the damping force by utilizing the self telescopic displacement of the damping damper when vibrating greatly at low frequency, thereby greatly improving the resonance of the shell of the washing machine when the washing machine operates and being more beneficial to maintaining the stability of the washing machine. In addition, because the air pressure value in the internal piston cylinder of the damping shock absorber can be adjusted at will, the stroke of the movable rod of the damping shock absorber can be adjusted freely, the damping shock absorber can be universal on different types of washing machines, the running stability of the washing machine when the inner cylinder rotates at high speed can be further met, and the vibration resistance of the whole machine is improved.
In addition, two pistons are arranged in a single piston cylinder, and the two pistons are connected through a spring, so that the two pistons can be pulled by the spring to reset to a relatively fixed initial position after losing the extrusion acting force of compressed gas pumped into the air pump; more preferably, the middle part of the spring is connected with the center of the piston cylinder, so that the initial position of the piston which is pulled by the spring to reset is kept relatively constant with the piston cylinder, and the friction strip is shifted by the reset limiting ring to be kept in the middle of the support cavity which has downward movement allowance.
Meanwhile, the invention has simple structure, simple method and obvious effect and is suitable for popularization and use.
Drawings
FIG. 1 is a cross-sectional view illustrating a damping shock absorber according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view schematically illustrating the structure of a damping shock absorber according to another embodiment of the present invention;
FIG. 3 is a cross-sectional view schematically illustrating a damping shock absorber according to still another embodiment of the present invention.
Description of the main elements: 1. a support sleeve; 2. a movable rod; 3. a rubbing strip; 4. a support cavity; 5. a first spacing collar; 6. a second limit ring; 7. an air pump; 8. an exhaust valve; 9. a piston cylinder; 10. a piston rod; 11. fixing the rod; 12. a piston; 13. a spring; 14. a connecting portion; 91. a first piston cylinder; 92. a second piston cylinder; 101. a first piston rod; 102. a second piston rod; 121. a first piston: 122. a second piston.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example one
As shown in fig. 1 to 3, the present embodiment discloses a damping shock absorber, including: the supporting sleeve 1 is cylindrical, one end of the supporting sleeve 1 is sealed, and the other end of the supporting sleeve 1 is arranged opposite to the opening; the movable rod 2 is correspondingly inserted into the support sleeve 1 and can move in a telescopic way along the axial direction of the support sleeve 1; the friction strip 3 is arranged in the support sleeve 1 and is in contact with the outer wall of the movable rod 2; the upper side and the lower side of the friction strip 3 along the moving direction of the movable rod 2 are respectively provided with a limiting ring; the pressure inside a piston cylinder 9 of the piston cylinder structure is adjustable, and a piston rod 10 can stretch and penetrate through the piston cylinder; the end part of the piston rod 10 penetrating through the piston cylinder 9 is connected with the limiting ring, and the internal pressure of the piston cylinder 9 is adjusted, so that the limiting ring is fixed to limit the movement of the friction strip 3, or the limiting ring freely moves along with the friction strip 3.
As shown in fig. 1 to 3, the present embodiment discloses a damping shock absorber, including: the supporting sleeve 1 is cylindrical, one end of the supporting sleeve 1 is sealed, and the other end of the supporting sleeve 1 is arranged opposite to the opening; the movable rod 2 is correspondingly inserted into the support sleeve 1 and can move in a telescopic mode along the axial direction of the support sleeve 1; the friction strip 3 is arranged in the support sleeve 1 and is in contact with the outer wall of the movable rod 2; the upper side and the lower side of the friction strip 3 along the moving direction of the movable rod 2 are respectively provided with a limit ring; the piston cylinder structure comprises a piston cylinder 9, wherein the internal pressure of the piston cylinder is adjustable, and a movable rod 10 is arranged in a telescopic mode and penetrates through the piston cylinder; the end part of the movable rod 10 penetrating through the piston cylinder 9 is connected with the limiting ring, and the internal pressure of the piston cylinder 9 is adjusted, so that the limiting ring is fixed to limit the friction strip 3 to move or the limiting ring freely moves together with the friction strip 3.
Through the arrangement, the internal pressure of the piston cylinder can be adjusted to adjust the supporting force of the friction strip 3, and then the aim of correspondingly adjusting the damping force provided by the movable rod 2 of the damping shock absorber is achieved.
In the embodiment, a spring 13 connected with a piston rod is arranged in the piston cylinder; on the premise of not applying external acting force, the spring 13 pushes the piston rod 10, and the piston rod 10 pushes the limiting ring, so that the limiting ring is kept at an initial position; when the spacing rings are at the initial positions, the friction strips 3 are pushed and pressed by the spacing rings at the two sides and are positioned in the middle of the supporting cavity 4. Through in 1 inside along the flexible direction of movable rod 2 of damping bumper shock absorber supporting sleeve, 3 both sides of friction strip set up respectively and block by spacing circle to guarantee that friction strip 3 receives the spacing circle limiting displacement of spring pulling and keeps in the initial fixed position at 1 middle part of supporting sleeve, and then guaranteed that friction strip 3 all possesses certain activity allowance in 1 axial two directions of supporting sleeve, in order to guarantee that the damping bumper shock absorber has upper and lower two-way free stroke, satisfy the purpose of shock attenuation demand.
In the embodiment, the friction strip 3 is of a cylindrical structure sleeved on the periphery of the movable rod 2, and the inner periphery of the cylindrical friction strip 3 is in contact with the outer wall of the movable rod 2; two opposite ends of the cylindrical friction strip 3 are respectively provided with a limit ring. In this embodiment, the limiting rings on two opposite sides of the movable rod 2 in the telescopic moving direction are respectively a first limiting ring 5 and a second limiting ring 6.
In this embodiment, a support covering the outer contour of the friction strip 3 is disposed on the periphery of the friction strip 3, an opening is disposed on one side of the support facing the movable rod 2, the friction strip 3 is installed in the support, the friction strip 3 is exposed outside from the opening of the support, and the exposed portion of the friction strip 3 is in contact with the outer side wall of the movable rod 2, so that a friction force is formed between the friction strip 3 and the movable rod 2, and the friction strip 3 moves together with the movable rod 2 or moves relative to the movable rod 2 under the action of the friction force.
In this embodiment, the limiting ring is a ring-shaped structure sleeved on the periphery of the movable rod 2; in the movable telescopic direction of the movable rod 2, the annular spacing ring is at least partially overlapped with the friction strip 3, so that the annular spacing ring can limit and block the friction strip 3. Preferably, the inner and outer circumferences of the annular retainer correspond to the inner and outer circumferences of the rubbing strip 3, and are set to be equal.
In the embodiment, one end of the supporting sleeve 1 is closed, and the other end of the supporting sleeve is arranged opposite to the opening, and the movable rod 2 is inserted into the supporting sleeve 1 from the opening end and extends along the axial direction of the outer shaft of the shock absorber; the support sleeve 1 near the sealed end is provided with vent holes for introducing external atmosphere into the internal chamber, and the vent holes penetrate through the support sleeve 1 to communicate the external atmosphere with the internal chamber of the support sleeve 1. Preferably, the vent hole is a cylindrical hole and is arranged at the sealing end of the support sleeve 1, so that the movable rod 2 and the inside of the support sleeve 1 are ventilated with the outside atmosphere, and the heat dissipation of the friction strip 3 can be facilitated. Further preferably, the support sleeve 1 is provided with a plurality of vent holes, and the vent holes are arranged at intervals and angles relative to the axis of the support sleeve 1.
In this embodiment, the supporting sleeve 1 is provided with a radially protruding supporting cavity 4, the rubbing strip 3 is correspondingly installed in the supporting cavity 4, and the two opposite sides of the rubbing strip 3 are respectively provided with at least one limiting ring. Preferably, the support cavity 4 is provided on the side of the support sleeve 1 near the open end. In this embodiment, a certain gap is left between the outer peripheral side of the rubbing strip 3 and the inner wall of the supporting cavity 4, so that the rubbing strip 3 does not contact the inner wall of the supporting cavity 4 when stretching together with the movable rod 2, and damage to the damping shock absorber due to interference is avoided.
In this embodiment, a first spacing collar 5 is disposed between the upper side of the rubbing strip 3 and the upper side of the supporting cavity 4, and a second spacing collar 6 is sandwiched between the lower side of the rubbing strip 3 and the lower side of the supporting cavity 4. In this embodiment, the first and second position-limiting rings 5 and 6 are both ring-shaped sheets sleeved on the periphery of the movable rod 2.
In the embodiment, the radial diameter of the outer periphery of the annular sheet friction strip 3 is smaller than that of the inner side wall of the support cavity 4, and the radial diameter of the inner periphery of the annular sheet friction strip 3 is equal to that of the movable rod 2; the radial diameter of the first spacing ring 5 and the second spacing ring 6 is not more than the radial diameter of the friction strip 3 and not less than the radial diameter of the side wall of the movable rod 2. Therefore, the occurrence of interference between the limiting ring and the inner wall of the supporting cavity 4 in the moving process is avoided.
In the embodiment, the limiting ring is connected with a piston rod 10 penetrating through the supporting sleeve 1, and the air pump 7 is connected with a piston cylinder 9 of the piston cylinder structure through a communicating pipeline so as to blow air into a piston cylinder 19 of the piston cylinder structure and increase the internal pressure of the piston cylinder 19; preferably, the communicating pipeline is provided with an exhaust port connected with the external atmosphere, and the exhaust port is provided with an exhaust valve 8 which can be controlled to open and close so as to flow out the gas in the piston cylinder and reduce the internal pressure of the piston cylinder. The piston cylinder is connected with the air pump 7, and the openable exhaust valve 8 is arranged on the communication pipeline, so that the air pressure in the piston cylinder can be pressurized under the action of the air pump 7 and reduced under the action of the exhaust valve 8, and the purposes of automatically adjusting the internal pressure of the piston cylinder and changing the damping force of the damping shock absorber are further achieved. Meanwhile, through the arrangement, the pressure in the piston cylinder can be switched between two working conditions of a set value and a minimum value, so that the damping shock absorber can respectively have the working states of a common friction damping type shock absorber and a free stroke type shock absorber.
Example two
As shown in fig. 1, in the present embodiment, the first retainer ring 5 and the second retainer ring 6 are respectively connected to piston rods of different piston cylinders; each piston cylinder is correspondingly connected with the same air pump 7 or different air pumps 7 through connecting pipelines.
As shown in fig. 1, in this embodiment, a first piston cylinder 91 and a second piston cylinder 92 which are independent from each other are installed outside the support sleeve 1, a first piston rod 101 and a second piston rod 102 are respectively installed in the first piston cylinder 91 and the second piston cylinder 92, respectively, and the first piston rod 101 and the second piston rod 102 respectively extend out of the corresponding piston cylinders along the moving direction of the movable rod and in the opposite direction.
In this embodiment, the first piston 121 is assembled at one end of the first piston rod 101 located inside the first piston cylinder 91, and one end of the first piston rod penetrating out of the first piston cylinder 92 penetrates into the support sleeve 2 to be connected with the first limit ring 5; the second piston rod 102 is assembled with a second piston 122 at the end inside the second piston cylinder 92, and the end penetrating out of the second piston cylinder 92 penetrates into the support sleeve 2 to be connected with the second stop collar 6.
In this embodiment, in order to reduce the occupied volume of the piston cylinder, the first piston rod 101 and the second piston rod 102 may be respectively provided with a partial folded section, so that the moving spaces of the stop collar and the piston rod 10 are at least partially overlapped, thereby reducing the overall volume of the damping shock absorber.
In this embodiment, the first piston cylinder 91 and the second piston cylinder 92 are respectively assembled on the support sleeve 1 through the fixing rod 11, so that the purpose of fixedly installing two independent piston cylinders on the support sleeve is achieved.
In this embodiment, in order to reset the position-limiting ring, a spring 13 is respectively disposed in the first piston cylinder 91 and the second piston cylinder 92, and two ends of the spring 13 are respectively connected to the piston cylinder 9 and the piston rod 10, so that when the piston cylinder 9 is at normal pressure, the spring 13 pushes the piston 12 to keep the position-limiting ring at an initial position. Preferably, when the first stop collar 5 and the second stop collar 6 are in the initial position, the friction bar 3 is clamped by the two stop collars and is located in the center of the support cavity.
EXAMPLE III
As shown in fig. 2, in the present embodiment, the outer wall of the support sleeve 1 is equipped with a piston cylinder 9, and the upper and lower ends of the piston cylinder 9 respectively penetrate through a piston rod 10, which is a first piston rod 101 and a second piston rod 102. The end of the first piston rod 101 extending into the piston cylinder is provided with a first piston 121, and the end of the second piston rod 102 extending into the piston cylinder 9 is provided with a second piston 122. The first piston 121 and the position where the first piston rod 101 penetrates out of the piston cylinder 9 are connected with the air pump 7 through a first branch; the second piston 122 is connected to the air pump 7 via a second branch between the position where the second piston rod 102 exits the piston cylinder 9.
In this embodiment, the first branch and the second branch are respectively connected to the same air pump 7 through two pistons of the piston cylinder 9, so that the air pressures at the pistons of the two piston rods are balanced, and the purposes of synchronous movement of the two piston rods, equal support force at the two spacing rings, and balanced force on the friction strips are achieved.
In this embodiment, one end of the first piston rod 101, which penetrates out of the piston cylinder 9, penetrates into the support sleeve 2 and is connected with the first limit ring 5; one end of the second piston rod 102, which penetrates out of the piston cylinder 9, penetrates into the support sleeve 2 and is connected with the second limit ring 6.
In this embodiment, the piston cylinder 9 is fixedly mounted on the supporting sleeve through the fixing rod 11, so that when the pressure in the piston cylinder is at atmospheric pressure, the two limiting rings are respectively connected with the friction strips in the middle of the supporting sleeve correspondingly.
As shown in fig. 2, in the present embodiment, a spring 13 is sandwiched between the first piston 121 and the second piston 122 inside the piston cylinder 9, the spring 13 is disposed along the direction in which the piston cylinder 9 extends up and down, and both ends of the spring 13 are respectively connected to the corresponding side pistons 12, so that the rubbing strip 3 is kept at a constant position by the spring 13 when the rubbing strip 3 is not moved relative to the support sleeve 1.
Preferably, in the present embodiment, when the rubbing strip 3 is in the constant position, the center of the spring 13 is in the same height section as the center of the moving space of the rubbing strip 3. In the present embodiment, in order to achieve the purpose of resetting the driving friction strip 3 to the center, the following settings are performed: as shown in fig. 3, the center of the spring 13 is fixedly connected with a connecting part 14 arranged on the inner wall of the piston cylinder, and the center of the spring 13 and the center of the supporting cavity 4 are at the same vertical height, so that the friction strip 3 is kept at the central initial position under stress after the spring 13 pulls the stop collar to reset.
In this embodiment, the two pistons 12 of the piston cylinder 9 are respectively and correspondingly communicated with different air pumps 7 through pipelines, and the exhaust valves 8 are respectively arranged on the corresponding pipelines to control the two air pumps 7 to synchronously blow air or release air through the exhaust valves, which can also achieve the above purpose (not shown in the drawings).
Example four
The embodiment describes a washing machine provided with any one of the damping shock absorbers in the first to the third embodiments, wherein the damping shock absorber is hinged with an outer cylinder of the washing machine, and a movable rod 2 is hinged with an outer shell of the washing machine; or the movable rod 2 of the damping shock absorber is hinged with the outer cylinder of the washing machine, and the support sleeve 1 is hinged with the outer shell of the washing machine, so that the aim that the outer cylinder is movably arranged in the outer shell by the damping shock absorber is fulfilled.
In this embodiment, the specific working process of the damping shock absorber is as follows:
when the outer barrel of the washing machine needs to provide a large damping acting force, compressed gas is injected into a piston cylinder of the damping shock absorber, so that the pressure in the piston cylinder reaches a set air pressure value, the limiting rings are supported by the air pressure in the piston cylinder and are fixedly positioned, and the friction strips are supported by the limiting rings on the two sides and are in a relatively fixed state, so that the damping acting force is provided for the movable rod 2 when the movable rod generates axial telescopic displacement.
When the outer drum of the washing machine only needs small damping force or does not need damping acting force, the piston cylinder of the damping shock absorber is deflated to normal pressure, so that the limiting ring is in a free state without being supported; the friction strip is not blocked by the limiting ring any longer, and when the movable rod 2 generates axial telescopic displacement, the friction strip moves together with the movable rod, and the friction strip does not provide damping force or only provides minimum damping force for the friction strip.
In addition, because the atmospheric pressure value in the inside piston cylinder of damping bumper shock absorber in this application can be adjusted at will for 2 strokes of movable rod of damping bumper shock absorber can realize freely adjusting, and then guaranteed that the damping bumper shock absorber in this application can carry out the commonality on different model washing machines, but also can satisfy the stability of washing machine operation when inner drum high-speed rotation, improve the shock resistance of complete machine.
In the embodiment, the control method of the washing machine is also introduced, when the inner cylinder is in a low-rotation-speed stage in the dewatering process of the washing machine, the exhaust valve 8 of the damping shock absorber is controlled to be in a closed state, and the air pump 7 flows air into the piston cylinder until the pressure in the piston cylinder reaches a set value; when the inner cylinder rotates at a high rotating speed stage, the exhaust valve 8 is controlled to be in an open state, the air pump 7 stops blowing air flow into the piston cylinder, and the piston cylinder is deflated until the internal air pressure is equal to the atmospheric pressure.
The specific process is as follows:
the control logic of the damper exhaust valve 8 in the dehydration process of the washing machine in the embodiment is as follows:
1. after the washing machine stops working, the air pump 7 stops working, the exhaust port is opened, the limiting ring in the damping shock absorber is in a free state and is kept in an initial state under the action of the spring, and the friction strip is limited in the center of the supporting cavity;
2. when the washing machine is electrified and starts to work, the exhaust port is closed, the air pump 7 supplies power to inject compressed air flow into the piston cylinder until the inside of the piston cylinder reaches a set value, and the limiting ring is kept stationary under the action of compressed air pressure; the friction strips 3 in the damping shock absorber are limited by the limiting rings at the two sides and are fixed in the supporting sleeve 1, and the movable rod 2 provides supporting force for the outer cylinder of the washing machine by the friction force provided by the friction strips 3;
3. when the washing machine starts to dewater and the rotating speed of the inner cylinder is in a low-speed stage, controlling an exhaust valve 8 of the damping shock absorber to be in a closed state, sealing a piston cylinder of the damping shock absorber, injecting compressed gas into the piston cylinder of the damping shock absorber by an air pump 7, enabling the pressure in the piston cylinder to reach a set air pressure value, enabling the friction strips to be supported by the limiting rings on the two sides and to be in a relatively fixed state, and providing a larger damping acting force for ensuring the normal operation of the washing machine when the movable rod 2 generates axial telescopic displacement; at the moment, the shock absorber is in a common friction damping type shock absorber state, the movable rod 2 and the friction strip 3 can rub against each other to generate damping force to block the vibration of the outer cylinder;
4. when the washing machine starts to dewater and the rotating speed of the inner cylinder rises to reach a high rotating speed stage, the exhaust valve 8 is controlled to be in a full-open state, at the moment, gas in a piston cylinder of the damping shock absorber is quickly exhausted, the piston cylinder of the damping shock absorber is deflated to normal pressure, the limiting ring loses the supporting force and is in a free state, and the friction strip is not subjected to the supporting acting force of the limiting ring and is in a free state, so that when the movable rod 2 generates axial telescopic displacement, the minimum damping acting force is not provided for the movable rod or only is provided for the movable rod; at the moment, the damper is equivalent to a free-running type damper, and the friction strip, the sliding block and the movable rod can freely slide relative to the supporting sleeve as a whole, so that small-amplitude vibration of the outer cylinder can not be transmitted to the box body of the washing machine, the vibration of the box body in the high-speed rotation process of the inner cylinder is weakened, and the use experience of a user is improved.
Simultaneously, the piston cylinder of installation is in the ordinary pressure state after the gassing in the damping bumper shock absorber in this application for the flexible displacement of movable rod 2 can reach the maximum limit of damping bumper shock absorber, and then makes the damping bumper shock absorber in this application can completely with the washing machine phase-match of various models, classification, in order to satisfy the high-speed rotation stage of washing machine inner tube to the demand of free stroke volume.
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 (12)
1. A damped shock absorber, comprising:
a support sleeve;
the movable rod is correspondingly inserted into the support sleeve and can move in a telescopic manner along the axial direction of the support sleeve;
the method is characterized in that:
the friction strip is arranged in the supporting sleeve and is in contact with the outer wall of the movable rod;
the upper side and the lower side of the friction strip along the moving direction of the movable rod are respectively provided with one limiting ring;
the piston cylinder structure comprises a piston cylinder with adjustable internal pressure, and a telescopic piston rod penetrating through the piston cylinder;
the end part of the piston rod penetrating out of the piston cylinder is connected with the limiting ring, and the internal pressure of the piston cylinder is adjusted, so that the limiting ring is fixed to limit the friction strip to move or the limiting ring freely moves along with the friction strip.
2. The damping shock absorber of claim 1, wherein the piston cylinder is connected to an air pump through a pipeline, the air pressure inside the piston cylinder is adjusted through the air pump, and after the pressure inside the piston cylinder reaches a set value, the pressure applied to the piston overcomes the friction force between the movable rod and the friction strip to keep the stop collar static;
and one end of the piston rod, which is positioned in the piston cylinder, is provided with a piston for covering the section of the piston cylinder, and the communication part of the pipeline and the piston cylinder is positioned between the piston and the penetrating part of the piston rod from the piston cylinder.
3. The damping shock absorber of claim 2, wherein a piston rod is respectively extended out of each of the upper and lower ends of the piston cylinder, a piston is respectively disposed at the extended-in end of each of the two piston rods, and the space between the two pistons and the corresponding piston rod extended-out portion is respectively connected to a same air pump through a branch pipe, so that the air pressure at the piston portions of the two piston rods is balanced.
4. The damping shock absorber of claim 2, wherein the upper and lower retainer rings are respectively connected to the piston rod through-out end of a corresponding piston cylinder structure, and the piston cylinders of the two piston cylinder structures are communicated with the same or corresponding air pumps through pipelines.
5. The damping shock absorber of any one of claims 1 to 4, wherein the piston cylinder is fixedly mounted on the support sleeve by a fixing rod, so that when the pressure in the piston cylinder is at atmospheric pressure, the two limit rings are respectively connected with the friction strips at the middle part of the support sleeve correspondingly.
6. The damping shock absorber of any one of claims 2 to 4, wherein the piston cylinder structure further comprises a release valve, the release valve being openable and closable on a line connecting the piston cylinder and the air pump to release gas from the piston cylinder to reduce the pressure in the cylinder after the release valve is opened.
7. A damping shock absorber according to claim 3, wherein a spring is clamped between the end pistons of the two piston rods in the piston cylinder, the spring is arranged along the vertical extension direction of the piston cylinder, and the two ends of the spring are respectively connected with the corresponding side pistons, so that the friction bar is kept at a constant position under the action of the spring when the friction bar is not moved relative to the support sleeve.
8. The damping shock absorber according to claim 7, wherein the center of the spring is positioned in the same height section as the center of the moving space of the friction bar when the friction bar is in the constant position.
9. A damped shock absorber according to claim 8, wherein the spring centre is fixedly connected to the piston cylinder.
10. A damping shock absorber according to any one of claims 7 to 9 wherein the distance of travel of the piston in the piston cylinder in the direction of telescopic movement of the movable rod is greater than the distance of travel of the friction bar in the support sleeve.
11. A washing machine equipped with the damping shock absorber as claimed in any one of claims 1 to 10.
12. A control method of a washing machine, characterized in that: the washing machine is equipped with the damping shock absorber of claim 6;
when the inner cylinder is in a low-rotation-speed stage in the dehydration process of the washing machine, controlling a deflation valve of the damping shock absorber to be in a closed state, and enabling the air pump to flow air into the piston cylinder until the pressure in the piston cylinder reaches a set value;
when the inner cylinder is in a high rotating speed stage, the air release valve of the damping shock absorber is controlled to be in an open state, the air pump stops blowing air flow into the piston cylinder, and the piston cylinder is deflated until the internal air pressure is equal to the atmospheric air.
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| CN201910337348.2A CN111853134B (en) | 2019-04-25 | 2019-04-25 | Damping shock absorber, washing machine with same and control method |
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| CN112682452B (en) * | 2020-12-15 | 2022-03-18 | 中铁武汉大桥工程咨询监理有限公司 | Built-in locking type multifunctional adjustable damper and bridge structure |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0407755A1 (en) * | 1989-07-10 | 1991-01-16 | Miele & Cie. GmbH & Co. | Frictional damper, particularly for washing machine |
| DE69208334D1 (en) * | 1991-11-27 | 1996-03-28 | Sebac Ind Srl | Dampers, in particular for washing machines |
| US5961105A (en) * | 1996-04-16 | 1999-10-05 | Suspa Compart Aktiengesellschaft | Frictional damper, in particular for washing machines with spinning cycle |
| CN1572965A (en) * | 2003-06-17 | 2005-02-02 | Lg电子株式会社 | Damper for drum type washing machine |
| CN104562553A (en) * | 2013-10-28 | 2015-04-29 | 海尔集团技术研发中心 | Washing machine |
| CN106195089A (en) * | 2015-04-30 | 2016-12-07 | 青岛海尔洗衣机有限公司 | A kind of variable-damp vibration damper and washing machine |
| CN109611494A (en) * | 2019-01-11 | 2019-04-12 | 凌露璐 | A kind of roller washing machine damping changing impact damper |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101401725B1 (en) * | 2010-05-11 | 2014-06-27 | 아딜 카니즈 | An electromechanical friction shock absorber |
-
2019
- 2019-04-25 CN CN201910337348.2A patent/CN111853134B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0407755A1 (en) * | 1989-07-10 | 1991-01-16 | Miele & Cie. GmbH & Co. | Frictional damper, particularly for washing machine |
| DE69208334D1 (en) * | 1991-11-27 | 1996-03-28 | Sebac Ind Srl | Dampers, in particular for washing machines |
| US5961105A (en) * | 1996-04-16 | 1999-10-05 | Suspa Compart Aktiengesellschaft | Frictional damper, in particular for washing machines with spinning cycle |
| CN1572965A (en) * | 2003-06-17 | 2005-02-02 | Lg电子株式会社 | Damper for drum type washing machine |
| CN104562553A (en) * | 2013-10-28 | 2015-04-29 | 海尔集团技术研发中心 | Washing machine |
| CN106195089A (en) * | 2015-04-30 | 2016-12-07 | 青岛海尔洗衣机有限公司 | A kind of variable-damp vibration damper and washing machine |
| CN109611494A (en) * | 2019-01-11 | 2019-04-12 | 凌露璐 | A kind of roller washing machine damping changing impact damper |
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Address after: No.16 Huatian north, Ronggui high tech Zone, Shunde District, Foshan City, Guangdong Province, 528306 Applicant after: FOSHAN SHUNDE HAIER ELECTRIC Co.,Ltd. Applicant after: Haier Smart Home Co., Ltd. Address before: No.16 Huatian north, Ronggui high tech Zone, Shunde District, Foshan City, Guangdong Province, 528306 Applicant before: FOSHAN SHUNDE HAIER ELECTRIC Co.,Ltd. Applicant before: QINGDAO HAIER JOINT STOCK Co.,Ltd. |
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