WO2019019553A1 - Structure d'amortissement de machine à laver, procédé de conception, appareil d'absorption de choc transversal et machine à laver - Google Patents

Structure d'amortissement de machine à laver, procédé de conception, appareil d'absorption de choc transversal et machine à laver Download PDF

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Publication number
WO2019019553A1
WO2019019553A1 PCT/CN2017/119726 CN2017119726W WO2019019553A1 WO 2019019553 A1 WO2019019553 A1 WO 2019019553A1 CN 2017119726 W CN2017119726 W CN 2017119726W WO 2019019553 A1 WO2019019553 A1 WO 2019019553A1
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WIPO (PCT)
Prior art keywords
section
damping
washing machine
diameter
rod
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Application number
PCT/CN2017/119726
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English (en)
Chinese (zh)
Inventor
张江涛
武凤玲
牟秋启
范强
国强
劳春峰
Original Assignee
青岛海尔洗衣机有限公司
青岛海尔智能技术研发有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority claimed from CN201710632488.3A external-priority patent/CN109306600B/zh
Priority claimed from CN201710630276.1A external-priority patent/CN109306599B/zh
Priority claimed from CN201710632489.8A external-priority patent/CN109306601B/zh
Application filed by 青岛海尔洗衣机有限公司, 青岛海尔智能技术研发有限公司 filed Critical 青岛海尔洗衣机有限公司
Publication of WO2019019553A1 publication Critical patent/WO2019019553A1/fr

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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

Definitions

  • the invention belongs to the technical field of washing machines, and particularly relates to a damping structure and design method of a washing machine, a lateral damping device and a washing machine.
  • the vibration reduction of the washing machine mainly suspends the inner and outer barrels of the washing machine by hanging the hanging rods at the four corners of the washing machine.
  • the inner and outer barrels are all reduced by the compression boom, and the boom absorbs the inner and outer cylinders by its own damping. vibration.
  • the use of the boom can only buffer the vibration in the vertical direction, and can not reduce the lateral vibration, resulting in the collision of the box under the large eccentricity, affecting the volume ratio and starting ability of the washing machine.
  • the rotation speed is increased from zero to 700 rpm or even higher.
  • the eccentric load caused by the unbalance of the clothes gradually increases with the increase of the rotational speed, and the fundamental frequency of the excitation force corresponding to the eccentric load increases from zero to ten Hz.
  • the pulsator washing machine generally has a distinct natural mode around 1 to 3 Hz. When the washing machine speed passes its modal frequency, it will cause resonance phenomenon in the washing machine. If the resonance phenomenon of the washing machine cannot be well controlled, the washing machine may be damaged or damaged.
  • the spring is fixed between the outer cylinder and the box in the patent CN201020229971.0 to provide the restoring force.
  • the resonance occurs, there is a large displacement between the outer cylinder and the casing, so that the spring connecting the outer cylinder and the casing is stretched or compressed to generate a restoring force, and the displacement between the outer cylinder and the casing is reduced.
  • the spring transmits the vibration on the outer cylinder to the box, causing the vibration of the washing machine box to sound and the noise of the whole machine to rise.
  • the invention aims at the above problems existing in the prior art, and provides a damping structure of a washing machine, which can prevent the washing machine from colliding with a box at a low speed dehydration, and can ensure that the vibration transmitted to the box is not increased when the water is dehydrated at a high speed. As a result, the noise of the whole machine increases.
  • a washing machine damping structure comprises a guiding sleeve and a guiding rod extending from one end into the guiding sleeve, wherein the inner side of the guiding sleeve is provided with a damping piece which cooperates with the guiding rod to generate a damping force, and the guiding rod has a central hollow a carrying section, and a working section at both ends of the empty section, the diameter of the empty section is smaller than the inner diameter of the damping piece, and the diameter of the working section is larger than the inner diameter of the damping piece; when the washing machine is stably operated, the The idle section is located at the damper sheet; when the vibration of the outer cylinder of the washing machine is large, the working section is located at the damper sheet.
  • the working section has a cylindrical main working section, and a variable diameter section disposed between the empty section and the main working section, and the diameter of any section of the variable section is located in the Between the no-load segment diameter and the working segment diameter.
  • the guiding rod further has a cut-off section extending toward the end portion along the working section, the guiding rod is telescopically moved relative to the guiding sleeve, when the cut-off section of the guiding rod moves to the vicinity of the damping piece The relative movement of the person stops.
  • the guiding sleeve is a cylindrical structure with one end open, the damping piece is disposed inside the open end of the guiding sleeve, and the other end of the guiding sleeve is provided with a first hinge portion.
  • the guiding rod is a hollow rod having an opening at one end, the open end of which is located in the guiding sleeve, and the other end of the guiding rod is provided with a second hinge portion.
  • a ferrule is disposed between the damper sheet and the guide sleeve, and an annular first slot is opened on an inner side of the open end of the guide sleeve, the ferrule is located at the first slot;
  • the inner side of the sleeve is provided with a second slot, and the damping piece is located at the second slot and is in contact with the radial edge of the first slot.
  • end of the ferrule is further provided with a rib extending outward in the radial direction, the rib being located at an end of the open end of the guiding sleeve.
  • At least two buckles are arranged on the outer side of the ferrule, and the first slot is provided with a card slot matched with the buckle, and the buckle is fastened to the card. Inside the slot.
  • a vent hole is formed in the wall of the opposite end of the open end of the guide sleeve.
  • the present invention also provides a design method of the above damping structure, the design method comprising the following steps:
  • the length L z of the idle section of the guide rod is determined
  • L Max E The minimum spacing between the guide bar length L z load segment, and the outer tube and the housing, the guide rod determining the working length L w;
  • step A there is step A3 after step A2, and the positive pressure between the working section of the guiding rod and the damping piece is determined according to the damping force of the damping structure being F D and the friction coefficient c of the selected damping piece.
  • F N F D /c.
  • step A there is a step A4 after step A3, and according to the positive pressure F N and the equivalent stiffness k c of the damping piece, the working section between the working rod and the damping piece is determined.
  • the span spacing d c F N /k c .
  • a working portion of the guide rod has a frustum-shaped transition between the maximum diameter ⁇ w of the working section and the diameter ⁇ z of the idle section.
  • a working area maximum diameter ⁇ w of the guiding rod and a curved surface transition angle ⁇ z have a curved transition section, and a diameter of any cross section of the curved transition section is located in the The working section has a maximum diameter ⁇ w and a diameter of the idle section ⁇ z .
  • the working section maximum diameter ⁇ w of the guiding rod and the empty section diameter ⁇ z have at least one cylindrical transition section, and the diameter of the cylindrical transition section is located at the working section of the guiding rod Between the diameter ⁇ w and the diameter of the idle section ⁇ z .
  • the present invention also provides a washing machine having the damping structure, which can prevent the washing machine from colliding with the box at low speed dehydration, and can ensure that the vibration transmitted to the box is not increased when the high speed dehydration is performed. Large, resulting in increased noise.
  • a washing machine comprising a box body and an outer tube and an inner tube disposed in the box body, wherein the outer tube is hoisted on the box body by a boom, and the outer tube, the box body and the hanging rod are three
  • the above damping structure is provided between any two of them.
  • Another object of the present invention is to provide a washing machine lateral damping device having the above damping structure, comprising a first mounting seat hinged to one end of the damping structure, and a vertically disposed sliding rod, the other end of the damping structure being The sliding sleeve is disposed on the sliding bar, and the two ends of the sliding bar are respectively provided with a second mounting seat.
  • a sliding hole is defined in the damping structure, the sliding rod passes through the sliding hole, and a second cushion is disposed between the sliding rod and the sliding hole.
  • the second cushion comprises a second cylindrical body, a second flange extending outward along the upper and lower ends of the second cylindrical body, and the two second and second tubular bodies A receiving groove is formed that matches the edge of the slide hole.
  • two upper and lower limiting grooves are disposed on the sliding bar, and the sliding holes slide between the two limiting grooves on the sliding bar.
  • the first mounting seat is provided with a pin shaft
  • the damping structure is provided with a pin hole matched with the pin shaft
  • a first cushion pad is disposed between the pin shaft and the pin hole.
  • the first mounting seat has two mounting plates disposed in parallel, and the two mounting plates are respectively disposed opposite to each other, and the pin holes are located between the two pin seats.
  • a pin hole is formed in the pin seat, and the pin passes through the pin hole.
  • the damping structure includes a guiding rod and a guiding sleeve sleeved outside the guiding rod, and the inner side of the guiding sleeve is provided with a damping piece that cooperates with the guiding rod to generate a damping force, and the guiding rod has a central hollow And a working section at both ends of the empty section, the diameter of the empty section is smaller than the inner diameter of the damping piece, and the diameter of the working section is larger than the inner diameter of the damping piece.
  • one end of the guiding rod is located in the guiding sleeve, and the other end is set on the sliding rod;
  • the guiding sleeve is a cylindrical structure with one end open, and the other end is hinged with the first mounting seat.
  • the working section has a cylindrical main working section, and a variable diameter section disposed between the empty section and the main working section, and the diameter of any section of the variable section is located in the Between the no-load segment diameter and the working segment diameter.
  • the guiding rod further has a cut-off section extending along the working section toward the end, the guiding rod is telescopically moved relative to the guiding sleeve, when the cut-off section of the guiding rod moves to the damping piece The relative movement of the person stops.
  • a ferrule is disposed between the damper sheet and the guide sleeve, and an annular first slot is opened on an inner side of the open end of the guide sleeve, the ferrule is located at the first slot;
  • a second slot is defined in the inner side of the slot, and the damper sheet is located at the second slot and is in contact with the radial edge of the first slot.
  • end of the ferrule is further provided with a rib extending outward in the radial direction, the rib being located at an end of the open end of the guiding sleeve.
  • the outer side of the ferrule is axially arranged with at least two buckles, and the first notch is provided with a card slot matched with the buckle, and the buckle is located in the card slot.
  • a vent hole is formed in the wall of the opposite end of the open end of the guide sleeve.
  • the damping structure provided by the invention is used for providing a damping force in a horizontal direction.
  • the variable damping force is provided to vibrate in the outer cylinder.
  • the damping structure gives sufficient damping force to prevent the outer cylinder from colliding with the box; and in the safe amplitude of the outer cylinder of the washing machine, the damping structure gives less damping force or no damping force; thus, the washing machine runs stably.
  • the idle section is located at the damper sheet; when the vibration of the outer cylinder of the washing machine is large, the working section is located at the damper sheet; this can prevent the washing machine from colliding with the box at low speed dehydration, and can It ensures that the high-speed dehydration will not increase the noise of the whole machine due to the increase of the vibration transmitted to the cabinet.
  • FIG. 1 is a schematic structural view of an embodiment of a damping structure proposed by the present invention
  • Figure 2 is a cross-sectional structural view of Figure 1;
  • Figure 3 is an enlarged exploded view of the damper sheet of Figure 2;
  • Figure 4 is a schematic structural view of the damper rod of Figure 2;
  • Figure 5 is a washing machine provided with the damping structure of Figure 1;
  • Figure 6 is a flow chart of a method of designing a damping structure
  • Figure 7 is a schematic view showing a specific structure of the guide rod
  • FIG. 8 is a schematic structural view of an embodiment of a lateral shock absorbing device for a washing machine according to the present invention.
  • Figure 9 is a schematic enlarged view of the area A of Figure 8.
  • Figure 10 is a cross-sectional structural view of Figure 8.
  • Figure 11 is an enlarged schematic structural view of a region B in Figure 10;
  • Figure 12 is a schematic enlarged view of the area C of Figure 10;
  • Figure 13 is an enlarged schematic view showing a region D in Figure 10;
  • Figure 14 is a first specific structural diagram of the guide rod
  • Figure 15 is a third specific structural schematic view of the guide rod
  • the washing machine comprises a casing 10, a set outer cylinder 20 and an inner cylinder 30 disposed in the casing 10, and the outer cylinder 20 passes through four
  • the boom 40 is hoisted on the corner plate of the four corners of the box body 10; the washing machine crash box mainly occurs in the dehydration start phase, when the base frequency of the excitation force corresponding to the washing machine speed is close to the common frequency of the internal and external barrel crane boom forming system,
  • the inner and outer cylinders resonate, and the amplitude of the outer cylinder 20 is significantly increased, thereby causing the outer cylinder 20 to collide with the casing and causing a collision box.
  • the damping structure 50 is disposed in the casing 10, the outer cylinder 20, and the boom 40. Between the two, it is preferably disposed between the casing 10 and the outer cylinder 20. Due to the relative staticness of the casing 10, a more effective damping force can be provided to avoid the collision of the bucket.
  • the damper structure 50 includes a guiding rod 1 and a guiding sleeve 3 which is disposed outside the guiding rod 1.
  • a damping piece 2 is provided which cooperates with the guiding rod 1 to generate a damping force
  • the guiding rod 1 has The idle section 12 in the middle and the working section 11 at both ends of the idle section 12, wherein the diameter of the idle section 12 is smaller than the inner diameter of the damper sheet 2, and the diameter of the working section 11 is larger than the inner diameter of the damper sheet 2.
  • a damping force is generated between the guide rod 1 and the damper sheet 2 to avoid the collision of the bucket; the guide rod 1 has the idle section 12 and the working section 11, and when the washing machine is stably operated, the idle section 12 is located in the damping At the sheet 2, that is, within the safe amplitude of the stationary operation of the washing machine outer cylinder 20, the damping structure imparts a small damping force or no damping force, and thus the vibration on the outer cylinder 20 cannot be transmitted to the casing 10 through the damping structure 50.
  • the increase of the noise is avoided; when the vibration of the outer cylinder of the washing machine is large, there is a risk of hitting the barrel.
  • the expansion and contraction of the guide rod 1 is also relatively large, and the working section 12 is located at the damper sheet 2, and the prevention occurs outside.
  • the damping force of the vibration of the cylinder 20 is such that the vibration amplitude of the outer cylinder 20 is reduced to avoid hitting the barrel; that is, the damping structure 50 provides a variable damping force, and the damping structure 50 needs to prevent the washing machine from colliding at a low speed dehydration. It can also ensure that the noise of the whole machine will not increase due to the increase of the vibration transmitted to the box when the high-speed dehydration is performed.
  • the idle section 12 is cylindrical
  • the working section 11 has a cylindrical main working section 111 and a variable diameter section 112 disposed between the idle section 12 and the main working section 111.
  • the portion of the variable diameter section 112 having a diameter larger than the inner diameter of the damper sheet 2 is in contact with the damper sheet 2 to generate a damping force;
  • the variable diameter section 112 is in the shape of a truncated cone, that is, the busbar of the variable diameter section 112 is connected to the idle section 12 and A straight line inclined at one end between the main working sections 111, and the diameter of any section of the variable diameter section 112 is located between the diameter of the idle section 12 and the diameter of the main working section 111.
  • the guide rod 1 can smoothly transition between the idle section 12 and the working section 11 during the telescopic movement, and the variable diameter section 112 passes between the variable diameter section 112 and the damping piece 2 when the variable diameter section 112 passes through the damping piece 2.
  • the damping force gradually changes.
  • the guiding rod 1 further has a cut-off section 13 extending along the working section 11 toward the end.
  • the diameter of the cut-off section 13 is definitely larger than the diameter of the working section 11, and the guiding rod 1 is telescopically moved relative to the guiding sleeve 3, when the guiding rod
  • the cut-off section 14 of 1 moves to the vicinity of the damper sheet 2, the relative motion of both stops.
  • the guide rod 1 can be prevented from coming off the guide sleeve 3, and only when the amplitude of the outer cylinder 20 is large, the cut-off section 13 can also move to the vicinity of the damper sheet 2, at which time the guide rod 1 and the guide sleeve 3 are relatively stationary. That is, the two form a rigid whole, which can give the outer cylinder 20 a rigid blocking force and prevent the outer cylinder 20 from colliding with each other.
  • the guide sleeve 3 is a cylindrical structure with one end open, the damping piece 2 is disposed inside the open end of the guide sleeve 3, and the other end of the guide sleeve 3 is provided with a first hinge portion 31.
  • the vibration of the outer cylinder 20 drives the guiding rod 1 to move relative to the guiding sleeve 3 to provide a variable damping force;
  • the vent hole 32 is formed in the sleeve wall at the opposite end of the opening end of the guiding sleeve 3, and the guiding rod 1 is in the guiding sleeve 3
  • gas can flow out through the vent 32 or into the guide sleeve 3, avoiding the free end of the guide rod 1 enclosing a gas in the guide sleeve 3, so that the gas in the guide sleeve 3 can be moved when the guide rod 1 moves It flows out or is replenished so that when the vibration of the outer cylinder 20 is slow, gas damping is not formed.
  • the guiding rod 1 is a hollow rod having an opening at one end, the open end of which is located in the guiding sleeve 3, and the hollow rod of the guiding rod 1 is arranged, and the chamber of the guiding rod 1 is connected with the chamber of the guiding sleeve 3. In this way, a large receiving space is formed, and when the guiding rod 1 telescopically moves in the guiding sleeve 3, the influence of the airflow flowing through the through hole 32 on the guiding rod 1 is reduced; and the other end of the guiding rod 1 is provided with the second hinge Part 14.
  • a ferrule 5 is disposed between the damper sheet 2 and the guide sleeve 3, and an annular first notch 33 is opened inside the open end of the guide sleeve 3, and the ferrule 5 is provided.
  • the damper sheet 2 is fixed by the ferrule 5 and the first notch 33, and the thickness of the ferrule 5 is equal to the thickness of the first notch 33, so that the connection fixing structure at both ends of the damper sheet 2 is ensured to be flush;
  • the thickness of 2 is greater than the thickness of the second notch 51, that is, a portion of the damper sheet 2 projects inwardly, and the working portion of the guide bar 1 moves relative to the convex portion of the damper sheet 2 to generate a frictional damping force.
  • At least two buckles 52 are arranged on the outer side of the ferrule 5, and the first slot 33 is provided with a card slot 331 matching the buckle 52, and the buckle 52 is affixed.
  • the plurality of buckles 52 are evenly disposed in the axial direction of the ferrule 5; thus, by providing the buckle 52 and the card slot 331, the fixing between the ferrule 5 and the guide sleeve 3 is enhanced. Sex, while making the assembly operation of the ferrule 5 simple.
  • a rib 53 extending radially outward is further provided at the end of the ferrule 5, and the rib 53 is located at the end of the open end of the guide sleeve 3.
  • the design of the damping structure 50 needs to be performed for a specific washing machine model, and the main structure of the damping structure 50 designed for the washing machine is derived according to the known conditions of the washing machine.
  • the parameters ensure that the damping structure 50 has the above-described effects.
  • the design method of the damping structure 50 in this embodiment includes the following steps:
  • the dehydration start eccentric mass m e of the washing machine is determined; the highest resonance frequency f PMax of the low-frequency rigid body mode of the washing machine is a value simulated under ideal conditions; the calculated eccentric force Fe The maximum eccentric force when dehydrating the washing machine.
  • the anti-collision box device 50 needs to provide the anti-collision box balance force F C , wherein F C >F e -F h -F a is required .
  • F h is the horizontal balance force provided by the boom 40
  • F a is the elastic restoring force provided by the motor shaft.
  • F h is related to the deformation amount of the spring of the boom 40 and the angle between the boom 40 and the vertical direction
  • F a is related to the deviation angle of the motor shaft. Since F h is usually small and F a is related to the main shaft yaw angle, these two forces are replaced by the safety factor s1.
  • each washing machine is guaranteed to have at least two or more anti-collision box devices 50, and each washing machine at least guarantees two anti-collision box devices placed in different directions to ensure that when the outer tube 20 vibrates in the horizontal direction,
  • the crash box device 50 dampens the vibration of the outer cylinder 20 from two directions.
  • the number of crash box devices 50 is recommended to be an integer multiple of 2, preferably 2, 4, 6, 8.
  • the angle between the adjacent two anti-collision box devices 50 on the horizontal plane is between 30° and 150°, preferably four anti-collision box devices 50 are used, and the adjacent two anti-collision box devices 50 are perpendicular to each other. That is, the angle between the adjacent two crash box devices 50 on the horizontal plane is 90°.
  • the damper sheet 2 is circular
  • ⁇ c is the inner diameter of the damper sheet 2
  • the maximum diameter ⁇ w of the working section 11 of the guide rod 1 and the inner diameter ⁇ c of the damper sheet 2 need to be selected to a value, and Calculate another.
  • the diameter ⁇ z of the idle section 12 of the guide rod 1 is determined according to the inner diameter ⁇ c of the damper sheet 2.
  • the displacement amplitude d O is a displacement amplitude in the horizontal direction
  • s 4 is a safety factor
  • s 4 > 1 to ensure that the outer cylinder 40 is In stable operation
  • the idle section 12 is located at the damper sheet 2, and the damper structure 50 does not provide a damping force; wherein, 1 ⁇ s 4 ⁇ 3, but the value of s 4 cannot be too large, and the vibration amplitude of the outer cylinder 20 of the washing machine is avoided.
  • the working section of the guide bar 1 is not at the damper sheet 2, preferably, 1 ⁇ s 4 ⁇ 1.5.
  • L Max E The minimum spacing between the guide rod length L z idling section 1, and the outer cylinder 20 and the housing 10, determine the length L w guide rod 11 of the working section.
  • the working length of the guide rod is L w ⁇ L Max - L z /2, wherein L Max is the minimum distance between the outer cylinder and the casing.
  • L Max is the minimum distance between the outer cylinder and the casing.
  • the rigidity of the outer cylinder 20 is such that the impingement of the outer cylinder 20 is avoided, and thus the length of the guide rod working section L w ⁇ L Max - L z /2 is set.
  • the maximum diameter ⁇ w of the working section 11 of the guiding rod 1 is: the maximum diameter ⁇ w of the working section 11 of the guiding rod 1 , the working section length L w , the diameter of the idle section 12 ⁇ z , and the length of the idle section 12 L z , the inner diameter ⁇ c of the damper sheet 2.
  • a specific structural form of the guide rod 1 is an equal diameter cylindrical section having a diameter of ⁇ z and a length L z
  • the working section 11 has an equal diameter cylindrical section 111 having a diameter of ⁇ w
  • the frustum-shaped transition section 112 the diameter of any cross-section of the frustum-shaped transition section is located between the maximum diameter ⁇ w of the working section 11 of the guide rod 1 and the diameter ⁇ z of the idle section 13 .
  • the truncated cone transition section 112 is a frustum between the equal diameter cylindrical section 111 and the idle section 12, the cutoff section 13 is located at both ends of the guide rod 1, and the cutoff section 13 is also an equal diameter cylindrical section.
  • the design process is illustrated by taking the 8kg platform pulsator washing machine as an example.
  • the design method is as follows:
  • FIG. 3 to 8 and FIG. 13 are an embodiment of a lateral damper device for a washing machine according to the present invention.
  • the washing machine includes a casing 10, a set of outer cylinders 20 disposed in the casing 10, and The inner cylinder 30 and the outer cylinder 20 are hoisted on the corner plates of the four corners of the casing 10 through four booms 40; the washing machine crash box mainly occurs in the dehydration start phase, when the washing machine speed corresponds to the excitation force fundamental frequency and the inner and outer barrel machine When the common frequency of the boom forming system is close, the inner and outer cylinders resonate, and the amplitude of the outer cylinder 20 is significantly increased, thereby causing the outer cylinder 20 to collide with the casing and the collision box is generated.
  • the lateral damper 50 is disposed on the casing 10, the outer cylinder 20, and the boom 40. Between the two of the three, it is preferably disposed between the casing 10 and the outer cylinder 20. Due to the relative staticness of the casing 10, a more effective damping force can be provided to avoid the collision of the bucket.
  • the washing machine lateral damper device 50 includes a damping structure including a guiding rod 1, and a guiding sleeve 3 fitted on the outside of the guiding rod 1, in the guiding sleeve 3
  • the inner side is provided with a damping piece 2 that cooperates with the guide rod 1 to generate a damping force.
  • a first mounting seat 6 is hinged at one end of the damping structure, and the other end of the damping structure is slidably fitted on the sliding rod 7.
  • the sliding rod 7 is vertically disposed, and a second mounting is respectively disposed at both ends of the sliding rod 7.
  • One end of the damping structure can be slid on the sliding rod 7, so that when the outer cylinder 20 has vibration in the up and down direction, the damping structure can be horizontally or approximately horizontally slid by sliding on the sliding rod 7, so that the damping structure is mainly
  • the force used to dampen the horizontal direction is beneficial to increase the effect of the lateral damping and avoid the impact of the box caused by the excessive amplitude of the outer cylinder.
  • the first mounting seat 6 is fixed on the outer cylinder 20, and the two second mounting seats 8 are fixed up and down on the casing 10; when the outer cylinder 20 vibrates, the first mounting seat 6 and One end of the damper structure follows the outer cylinder 20 to vibrate.
  • the vibration at any point on the outer cylinder 20 can be decomposed into vibrations in the up-and-down direction, the left-right direction, and the front-rear direction, wherein the vibrations in the left-right direction and the front-rear direction are horizontal vibrations.
  • both ends of the damping structure have a certain distance in the up and down direction, and at this time, the other end of the damping structure slides on the sliding rod 7, and tends to dampen the structure level.
  • the direction of movement Since the casing 10 is in a relatively static state, the second mounting seat 8 is fixed on the casing 10, which ensures that the sliding rod 7 is in a vertical state, which is advantageous for ensuring smooth sliding of the other end of the damping structure on the sliding rod 7.
  • one end of the guiding rod 1 is located in the guiding sleeve 3, and the other end of the guiding rod 1 is provided with a sliding hole 14 and is fitted on the sliding rod 7.
  • the slide bar 7 passes through the slide hole 14 and a second cushion pad 9 is provided between the slide bar 7 and the slide hole 14.
  • the rigid contact between 14 avoids noise between the sliding rod 7 and the sliding hole 14 during sliding and when the damping structure is stressed; and when the damping structure is not in the horizontal plane, that is, both ends of the damping structure are up and down
  • the direction has a certain distance.
  • the axis of the sliding hole 14 coincides with the axial portion of the sliding rod 7.
  • the portion of the second cushioning pad 9 is elastically deformed by pressing, and the pulling force in the up and down direction is generated in the damping structure, so that the sliding The hole 14 can move smoothly.
  • the second cushion 9 includes a second cylindrical body 91, a second flange 92 extending outward along the upper and lower ends of the second cylindrical body 91, and two second turns.
  • the side 92 and the second cylindrical body 91 form a receiving groove that matches the edge of the sliding hole 14; and when the sliding hole 14 moves on the sliding bar 7, the second buffering is caused by the blocking of the upper and lower flanges 92.
  • the pad 8 snaps over the edge of the slide hole 14 and moves together.
  • two upper and lower limiting grooves 71 are provided on the sliding rod 7, and the sliding holes 14 slide between the two limiting grooves 71 on the sliding rod 7.
  • the limiting groove 71 By setting the limiting groove 71, the range of movement of the sliding hole 14 on the sliding rod 7 is defined, and the sliding smoothness of the sliding hole 14 on the sliding rod 7 is ensured to avoid the jamming situation.
  • the guide sleeve 3 is a cylindrical structure with one end open, the damping piece 2 is disposed inside the open end of the guide sleeve 3, and the other end of the guide sleeve 3 is provided with a pin hole 31, And hinged with the first mount 6.
  • a pin 61 is disposed on the first mounting seat 6, the pin 61 is vertically disposed, the guiding rod 1 is rotatable around the pin 61, and a first cushion is disposed between the pin 61 and the pin hole 31, and the first cushion is provided.
  • the same structure as the second cushion 9 is employed.
  • the first mounting seat 6 has two mounting plates 63 arranged in parallel, and the two mounting plates 63 are respectively provided with pin seats 62 adjacent to each other, and the pin holes 31 are located between the two pin seats 62.
  • a pin hole 64 is formed in the pin holder 62, and the pin 61 passes through the pin hole 64.
  • the guiding rod 1 when the outer cylinder 20 vibrates, the guiding rod 1 is moved relative to the guiding sleeve 3 to provide a variable damping force; the vent hole 32 is opened on the opposite end wall of the opening end of the guiding sleeve 3, and the guiding rod 1 is disposed on the guiding rod 1
  • the gas can flow out through the vent hole 32 or into the guide sleeve 3, and the free end of the guide rod 1 is prevented from enclosing a gas in the guide sleeve 3, so that the guide sleeve 1 moves when the guide rod 1 moves.
  • the gas in 3 can flow out or be replenished so that no gas damping is formed when the vibration of the outer cylinder 20 is slow.
  • the guiding rod 1 has a middle idle section 12 and a working section 11 at both ends of the idle section 12, wherein the diameter of the idle section 12 is smaller than the inner diameter of the damping piece 2, and the working section The diameter of 11 is larger than the inner diameter of the damper sheet 2.
  • the damping force is generated between the guiding rod 1 and the damping piece 2 to avoid the collision of the bucket; the guiding rod 1 has the idle section 12 and the working section 11, and when the washing machine is stably operated, the idle section 12 is located at the damping piece 2, That is, in the safety amplitude of the outer cylinder 20 of the washing machine in a stable operation, the lateral damper device gives a small damping force or does not give a damping force, so that the vibration on the outer cylinder 20 cannot be transmitted to the casing 10 through the lateral damper device 50. The noise is prevented from increasing; when the vibration of the outer cylinder of the washing machine is large, there is a risk of hitting the barrel.
  • the stretching range of the guiding rod 1 is also relatively large, and the working section 12 is located at the damping piece 2, and the outer tube is prevented at this time.
  • the damping force of the vibration causes the vibration amplitude of the outer cylinder 20 to be reduced to avoid the collision of the bucket; that is, the lateral damping device 50 provides a variable damping force, and the lateral damping device 50 needs to prevent the washing machine from colliding at low speed dehydration.
  • the box problem can ensure that the high-speed dehydration will not increase the noise of the whole machine due to the increase of the vibration transmitted to the box.
  • the idle section 12 is cylindrical, and the working section 11 has a cylindrical main working section 111 and a variable diameter section 112 disposed between the idle section 12 and the main working section 111.
  • the variable diameter section 112 The portion having an upper diameter larger than the inner diameter of the damper sheet 2 is in contact with the damper sheet 2 to generate a damping force; the variable diameter portion 112 is in the shape of a truncated cone, that is, the bus bar of the variable diameter portion 112 is connected to the idle portion 12 and the main working portion 111.
  • a straight line with one end inclined, the diameter of any section of the variable diameter section 112 is located between the diameter of the idle section 12 and the diameter of the main working section 111.
  • the guide rod 1 can smoothly transition between the idle section 12 and the working section 11 during the telescopic movement, and the variable diameter section 112 passes between the variable diameter section 112 and the damping piece 2 when the variable diameter section 112 passes through the damping piece 2.
  • the damping force gradually changes.
  • the guiding rod 1 further has a cut-off section 13 extending along the working section 11 toward the end.
  • the diameter of the cut-off section 13 is definitely larger than the diameter of the working section 11, and the guiding rod 1 is telescopically moved relative to the guiding sleeve 3, when the guiding rod
  • the cut-off section 14 of 1 moves to the vicinity of the damper sheet 2, the relative motion of both stops.
  • the guide rod 1 can be prevented from coming off the guide sleeve 3, and only when the amplitude of the outer cylinder 20 is large, the cut-off section 13 can also move to the vicinity of the damper sheet 2, at which time the guide rod 1 and the guide sleeve 3 are relatively stationary. That is, the two form a rigid whole, which can give the outer cylinder 20 a rigid blocking force and prevent the outer cylinder 20 from colliding with each other.
  • a ferrule 5 is disposed between the damper sheet 2 and the guide sleeve 3, and an annular first notch 33 is opened inside the open end of the guide sleeve 3,
  • the ferrule 5 is located at the first slot 33;
  • a second slot 51 is defined in the inner side of the ferrule 5, and the damper sheet 2 is located at the second slot 51 and is in contact with the radial edge of the first slot 33.
  • the damper sheet 2 is fixed by the ferrule 5 and the first notch 33, and the thickness of the ferrule 5 is equal to the thickness of the first notch 33, so that the connection fixing structure at both ends of the damper sheet 2 is ensured to be flush;
  • the thickness of 2 is greater than the thickness of the second notch 51, that is, a portion of the damper sheet 2 projects inwardly, and the working portion of the guide bar 1 moves relative to the convex portion of the damper sheet 2 to generate a frictional damping force.
  • At least two buckles 52 are arranged on the outer side of the ferrule 5, and the first slot 33 is provided with a card slot 331 matching the buckle 52, and the buckle 52 is affixed.
  • the plurality of buckles 52 are evenly disposed in the axial direction of the ferrule 5; thus, by providing the buckle 52 and the card slot 331, the fixing between the ferrule 5 and the guide sleeve 3 is enhanced. Sex, while making the assembly operation of the ferrule 5 simple.
  • a rib 53 extending radially outward is further provided at the end of the ferrule 5, and the rib 53 is located at the end of the open end of the guide sleeve 3.
  • the lateral damper device 50 in order to make the lateral damper device 50 provide the required variable damping force, it is necessary to design the lateral damper device 50 for a specific washing machine model, and derive the lateral design for the washing machine according to the known conditions of the washing machine.
  • the main parameters of the damper device 50 ensure that the lateral damper device 50 has the above-described effects.
  • the washing machine includes a casing 10, a set outer cylinder 20 and an inner cylinder 30 disposed in the casing 10.
  • the outer cylinder 20 is hoisted at the corners of the four corners of the casing 10 by four booms 40.
  • the washing machine crash box mainly occurs in the dehydration start stage, when the base frequency of the excitation force corresponding to the washing machine speed is close to the common frequency of the internal and external barrel crane boom system, the inner and outer cylinders resonate, and the amplitude of the outer cylinder 20 increases significantly. As a result, the outer cylinder 20 collides with the casing, and a collision box occurs.
  • the damping structure 50 is mainly used to provide a horizontal damping force, and a damping force is generated between the guiding rod 1 and the damping piece 2; the damping structure 50 needs to prevent the washing machine from colliding at a low speed dehydration and ensure high speed dehydration. The noise of the whole machine will not increase due to the increase of the vibration transmitted to the box.
  • the damping structure gives sufficient damping force to prevent the outer tube 20 from colliding with the box; 20 Within the safe amplitude of stable operation, the damping structure gives less or no damping force; that is, the damping structure 50 provides a variable damping force, which requires the damping rod 1 to have a hollow section 12 in the middle, And the working section 11 at the two ends of the idle section 11, when the outer cylinder 20 is within the safe amplitude of the stable operation, the idle section 11 is located at the damper sheet 2, and the guide rod 1 and the damper sheet 2 are not in contact with each other.
  • the damping force is generated, and the vibration on the outer cylinder 20 cannot be transmitted to the casing 10 through the damping structure 50, thereby avoiding an increase in noise; when the vibration amplitude of the outer cylinder 20 is large, there is a risk of hitting the barrel, and at this time, the guide rod 1 is Stretch The amplitude is relatively large, the working section 12 is positioned at the damper 2, a damping force generated at this time to prevent vibration of the outer cylinder 20, the outer cylinder 20 so that the vibration amplitude is reduced.
  • the main parameters of the damping structure 50 designed for the washing machine are derived from the known conditions of the washing machine, ensuring that the damping structure 50 has the above-described effects.
  • the design method in this embodiment includes the following steps:
  • the dehydration start eccentric mass m e of the washing machine is determined; the highest resonance frequency f PMax of the low-frequency rigid body mode of the washing machine is a value simulated under ideal conditions; the calculated eccentric force Fe The maximum eccentric force when dehydrating the washing machine.
  • the anti-collision box device 50 needs to provide the anti-collision box balance force F C , wherein F C >F e -F h -F a is required .
  • F h is the horizontal balance force provided by the boom 40
  • F a is the elastic restoring force provided by the motor shaft.
  • F h is related to the deformation amount of the spring of the boom 40 and the angle between the boom 40 and the vertical direction
  • F a is related to the deviation angle of the motor shaft. Since F h is usually small and F a is related to the main shaft yaw angle, these two forces are replaced by the safety factor s1.
  • each washing machine is guaranteed to have at least two or more anti-collision box devices 50, and each washing machine at least guarantees two anti-collision box devices placed in different directions to ensure that when the outer tube 20 vibrates in the horizontal direction,
  • the crash box device 50 dampens the vibration of the outer cylinder 20 from two directions.
  • the number of crash box devices 50 is recommended to be an integer multiple of 2, preferably 2, 4, 6, 8.
  • the angle between the adjacent two anti-collision box devices 50 on the horizontal plane is between 30° and 150°, preferably four anti-collision box devices 50 are used, and the adjacent two anti-collision box devices 50 are perpendicular to each other. That is, the angle between the adjacent two crash box devices 50 on the horizontal plane is 90°.
  • the damper sheet 2 is circular
  • ⁇ c is the inner diameter of the damper sheet 2
  • the maximum diameter ⁇ w of the working section 11 of the guide rod 1 and the inner diameter ⁇ c of the damper sheet 2 need to be selected to a value, and Calculate another.
  • the diameter ⁇ z of the idle section 12 of the guide rod 1 is determined according to the inner diameter ⁇ c of the damper sheet 2.
  • the displacement amplitude d O is a displacement amplitude in the horizontal direction
  • s 4 is a safety factor
  • s 4 > 1 to ensure that the outer cylinder 40 is In stable operation
  • the idle section 12 is located at the damper sheet 2, and the damper structure 50 does not provide a damping force; wherein, 1 ⁇ s 4 ⁇ 3, but the value of s 4 cannot be too large, and the vibration amplitude of the outer cylinder 20 of the washing machine is avoided.
  • the working section of the guide bar 1 is not at the damper sheet 2, preferably, 1 ⁇ s 4 ⁇ 1.5.
  • L Max E The minimum spacing between the guide rod length L z idling section 1, and the outer cylinder 20 and the housing 10, determine the length L w guide rod 11 of the working section.
  • the working length of the guide rod is L w ⁇ L Max - L z /2, wherein L Max is the minimum distance between the outer cylinder and the casing.
  • L Max is the minimum distance between the outer cylinder and the casing.
  • the rigidity of the outer cylinder 20 is such that the impingement of the outer cylinder 20 is avoided, and thus the length of the guide rod working section L w ⁇ L Max - L z /2 is set.
  • the maximum diameter ⁇ w of the working section 11 of the guiding rod 1 is: the maximum diameter ⁇ w of the working section 11 of the guiding rod 1 , the working section length L w , the diameter of the idle section 12 ⁇ z , and the length of the idle section 12 L z , the inner diameter ⁇ c of the damper sheet 2.
  • damping structure 50 The details of the damping structure 50 are designed according to the above main parameters, wherein the guiding rod 1 can have a variety of specific structures, which are described in detail below.
  • the idle section 12 is an equal diameter cylindrical section having a diameter of ⁇ z and a length L z , and the maximum diameter of the working section 11 of the guide rod 1 is idling.
  • the frustum-shaped transition section extends all the way to the cut-off section 13, that is, the diameter of the junction of the frustum-shaped transition section and the cut-off section 13 is the maximum diameter ⁇ w of the working section 11, and the frustum-shaped transition section is the working section 11.
  • the idle section 12 is an equal diameter cylindrical section having a diameter of ⁇ z and a length L z
  • the working section 11 has an equal diameter cylindrical section having a diameter of ⁇ w 111 and the frustum-shaped transition section 112, the diameter of any cross-section of the frustum-shaped transition section is located between the maximum diameter ⁇ w of the working section 11 of the guide rod 1 and the diameter ⁇ z of the idle section 13 .
  • the truncated cone transition section 112 is a frustum between the equal diameter cylindrical section 111 and the idle section 12, the cutoff section 13 is located at both ends of the guide rod 1, and the cutoff section 13 is also an equal diameter cylindrical section.
  • the frustum-shaped transition section 112 may also be designed as a curved transition section, and the diameter of any cross section of the arcuate transition section is located at the maximum diameter ⁇ w and the idle section of the working section 11 of the guide rod 1
  • the diameter of 13 is between ⁇ z .
  • the idle section 12 is an equal diameter cylindrical section having a diameter of ⁇ z and a length L z
  • the cutoff section 13 is an equal diameter cylindrical section
  • the working section 11 has An equal diameter cylindrical section 111 having a diameter of ⁇ w and a cylindrical transition section 113 having a diameter between the maximum diameter ⁇ w of the working section 11 and the diameter ⁇ z of the idle section 13 .
  • the design process is illustrated by taking the 8kg platform pulsator washing machine as an example.
  • the design method is as follows:
  • the damping structure 50 can be disposed between any two of the washing machine outer cylinder 20, the casing 10 and the boom 40 for providing a level.
  • the damping of the direction dampens the lateral vibration of the outer cylinder or the vibration in the horizontal direction.
  • the damper sheet 2 is fixed on the inner side of the guide sleeve 3, and the guide rod 1 is telescopically located in the guide sleeve 3.
  • the guide sleeve 3 is a cylindrical structure with one end open, and the damper sheet 2 is disposed inside the open end of the guide sleeve 3, and the guide sleeve The other end of 3 is provided with a first hinge portion 31.
  • the vibration of the outer cylinder 20 drives the guiding rod 1 to move relative to the guiding sleeve 3 to provide a variable damping force;
  • the vent hole 32 is formed in the sleeve wall at the opposite end of the opening end of the guiding sleeve 3, and the guiding rod 1 is in the guiding sleeve 3
  • gas can flow out through the vent 32 or into the guide sleeve 3, avoiding the free end of the guide rod 1 enclosing a gas in the guide sleeve 3, so that the gas in the guide sleeve 3 can be moved when the guide rod 1 moves It flows out or is replenished so that when the vibration of the outer cylinder 20 is slow, gas damping is not formed.
  • the guide rod 1 is a hollow rod having an open end, the open end of which is located in the guide sleeve 3, and the hollow rod is provided by the guide rod 1 position, and the chamber of the guide rod 1 is connected with the chamber of the guide sleeve 3. In this way, a large accommodation space is formed, and when the guide rod 1 telescopically moves in the guide sleeve 3, the influence of the airflow flowing through the through hole 32 on the guide rod 1 is reduced; and the other end of the guide rod 1 is provided with the second hinge portion. 14.
  • a ferrule 5 is disposed between the damper sheet 2 and the guide sleeve 3, and an annular first notch 33 is opened inside the open end of the guide sleeve 3, and the ferrule 5 is located at the A notch 33 is formed; a second slot 51 is defined in the inner side of the ferrule 5, and the damper sheet 2 is located at the second slot 51 and is in contact with the radial edge of the first slot 33.
  • the damper sheet 2 is fixed by the ferrule 5 and the first notch 33, and the thickness of the ferrule 5 is equal to the thickness of the first notch 33, so that the connection fixing structure at both ends of the damper sheet 2 is ensured to be flush;
  • the thickness of 2 is greater than the thickness of the second notch 51, that is, a portion of the damper sheet 2 projects inwardly, and the working portion of the guide bar 1 moves relative to the convex portion of the damper sheet 2 to generate a frictional damping force.
  • At least two buckles 52 are arranged on the outer side of the ferrule 5, and the first slot 33 is provided with a card slot 331 matching the buckle 52, and the buckle 52 is affixed.
  • the plurality of buckles 52 are evenly disposed in the axial direction of the ferrule 5; thus, by providing the buckle 52 and the card slot 331, the fixing between the ferrule 5 and the guide sleeve 3 is enhanced. Sex, while making the assembly operation of the ferrule 5 simple.
  • a rib 53 extending radially outward is further provided at the end of the ferrule 5, and the rib 53 is located at the end of the open end of the guide sleeve 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Abstract

L'invention concerne une structure d'amortissement de machine à laver, un procédé de conception, un appareil d'absorption de choc transversal et une machine à laver. La structure d'amortissement (50) comprend un manchon de guidage (3), et une tige de guidage (1) ayant une extrémité s'étendant dans le manchon de guidage (3). Sur le côté interne du manchon de guidage (3) est disposée une pièce d'amortissement (2) pour générer en tandem avec la tige de guidage (1) une force d'amortissement. La tige de guidage (1) est disposée au milieu avec une section sans charge (12) et des sections de travail (11) situées à chaque extrémité de la section sans charge (12). Le diamètre de la section sans charge (12) est inférieur au diamètre interne de la pièce d'amortissement (2) ; le diamètre des sections de travail (11) est supérieur au diamètre interne de la pièce d'amortissement (2). Au moyen de la fourniture de la section sans charge (12) et des sections de travail (11), la fourniture d'une force d'amortissement variable est mise en œuvre, lorsqu'un tambour externe (20) subit une grande vibration, la structure d'amortissement (50) fournit une force d'amortissement suffisante pour empêcher le tambour externe (20) de heurter un boîtier ; en outre, à l'intérieur d'une amplitude de vibration sûre pour un fonctionnement stable du tambour externe de machine à laver (20), la structure d'amortissement (50) fournit une force d'amortissement réduite ou ne fournit aucune force d'amortissement, ce qui permet non seulement d'éviter le problème de frappe du carter lorsque la machine à laver essore à faible vitesse, mais également de s'assurer que, lors du séchage par centrifugation à une vitesse élevée, le bruit unitaire global n'augmente pas en raison des vibrations accrues transmises au boîtier (10).
PCT/CN2017/119726 2017-07-28 2017-12-29 Structure d'amortissement de machine à laver, procédé de conception, appareil d'absorption de choc transversal et machine à laver WO2019019553A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
CN201710632488.3A CN109306600B (zh) 2017-07-28 2017-07-28 一种洗衣机防撞桶装置及洗衣机
CN201710630276.1A CN109306599B (zh) 2017-07-28 2017-07-28 一种洗衣机防撞桶装置的设计方法
CN201710632489.8 2017-07-28
CN201710630276.1 2017-07-28
CN201710632489.8A CN109306601B (zh) 2017-07-28 2017-07-28 一种洗衣机横向减震装置及洗衣机
CN201710632488.3 2017-07-28

Publications (1)

Publication Number Publication Date
WO2019019553A1 true WO2019019553A1 (fr) 2019-01-31

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PCT/CN2017/119726 WO2019019553A1 (fr) 2017-07-28 2017-12-29 Structure d'amortissement de machine à laver, procédé de conception, appareil d'absorption de choc transversal et machine à laver

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0117824A1 (fr) * 1983-01-31 1984-09-05 Mathias Georges Martinez Système de support et d'amortissement des mouvements d'une pièce ou d'une machine
JPH11351317A (ja) * 1998-06-08 1999-12-24 Hitachi Ltd ドラム式洗濯機
KR20010025847A (ko) * 1999-09-01 2001-04-06 구자홍 세탁기
KR20080037423A (ko) * 2006-10-26 2008-04-30 삼성전자주식회사 드럼세탁기
KR20150053305A (ko) * 2013-11-07 2015-05-18 삼성전자주식회사 댐퍼 및 이를 포함하는 세탁기
WO2016148478A1 (fr) * 2015-03-16 2016-09-22 엘지전자 주식회사 Appareil de traitement de linge
CN205821770U (zh) * 2016-05-19 2016-12-21 无锡小天鹅股份有限公司 洗衣机

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0117824A1 (fr) * 1983-01-31 1984-09-05 Mathias Georges Martinez Système de support et d'amortissement des mouvements d'une pièce ou d'une machine
JPH11351317A (ja) * 1998-06-08 1999-12-24 Hitachi Ltd ドラム式洗濯機
KR20010025847A (ko) * 1999-09-01 2001-04-06 구자홍 세탁기
KR20080037423A (ko) * 2006-10-26 2008-04-30 삼성전자주식회사 드럼세탁기
KR20150053305A (ko) * 2013-11-07 2015-05-18 삼성전자주식회사 댐퍼 및 이를 포함하는 세탁기
WO2016148478A1 (fr) * 2015-03-16 2016-09-22 엘지전자 주식회사 Appareil de traitement de linge
CN205821770U (zh) * 2016-05-19 2016-12-21 无锡小天鹅股份有限公司 洗衣机

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