WO2016173533A1 - 一种可变阻尼减震器及洗衣机 - Google Patents

一种可变阻尼减震器及洗衣机 Download PDF

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Publication number
WO2016173533A1
WO2016173533A1 PCT/CN2016/080657 CN2016080657W WO2016173533A1 WO 2016173533 A1 WO2016173533 A1 WO 2016173533A1 CN 2016080657 W CN2016080657 W CN 2016080657W WO 2016173533 A1 WO2016173533 A1 WO 2016173533A1
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WIPO (PCT)
Prior art keywords
damper
damping
wall
unit
outer casing
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PCT/CN2016/080657
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English (en)
French (fr)
Inventor
许升
吕艳芬
彭秀文
许梁
Original Assignee
青岛海尔洗衣机有限公司
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Application filed by 青岛海尔洗衣机有限公司 filed Critical 青岛海尔洗衣机有限公司
Priority to EP16785961.0A priority Critical patent/EP3290736B1/en
Priority to US15/570,299 priority patent/US20180142754A1/en
Priority to JP2017557041A priority patent/JP2018515725A/ja
Priority to KR1020177034183A priority patent/KR20170139667A/ko
Publication of WO2016173533A1 publication Critical patent/WO2016173533A1/zh

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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
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/08—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other
    • F16F7/09—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other in dampers of the cylinder-and-piston type
    • 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
    • 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
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/08—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other
    • F16F7/082—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other and characterised by damping force adjustment means
    • 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
    • F16F7/00—Vibration-dampers; Shock-absorbers
    • F16F7/08—Vibration-dampers; Shock-absorbers with friction surfaces rectilinearly movable along each other
    • F16F7/087—Elastomeric surface effect dampers

Definitions

  • the invention relates to the field of a shock absorbing device and a washing machine, and more particularly to a variable damping shock absorber capable of adjusting the damping of the shock absorber according to the vibration condition during use, and the variable damping shock absorber is provided Washing machine.
  • the shock absorber and the elastic element bear the task of cushioning and damping.
  • the connection piece inside the shock absorber is easily damaged; when the damping is too small, the vibration damping effect cannot be achieved.
  • the shock absorber can be applied to a washing machine which is designed to be made into a washing tub by a four-point shock absorber to absorb the vibration generated by the washing tub during the washing process, that is, to reduce the washing drum of the washing machine.
  • the shock absorber reduces vibration generated by the rotation of the washing tub by absorbing vibration and provides a holding force for supporting the washing tub, thereby eliminating an additional holding member such as a suspension.
  • An object of the present invention is to provide a damping damper that can be used during use. Adjust the damping according to the external vibration condition, effectively reduce the vibration and improve the vibration damping effect.
  • Another object of the present invention is to provide a washing machine provided with the above-mentioned damping variable shock absorber to solve the problem of large vibration in the prior art washing machine operation.
  • the present invention employs the following technical solutions:
  • a damper-variable damper includes a casing and a piston rod disposed in the casing and slidable along an inner wall of the casing, wherein the piston rod is fixedly provided with a first damper unit, and the first damper unit is provided a frictional force is generated between the piston rod and the inner wall of the outer casing, and an accommodating space is formed between the piston rod and the inner wall of the outer casing, and the inner wall of the outer casing is disposed in the accommodating space.
  • a mating second damping unit the second damping unit vertically moving along an inner wall of the outer casing and generating a frictional force with an inner wall of the outer casing;
  • the second damping unit is fixed relative to an inner wall of the outer casing when a stroke of the shock absorber is less than a preset value
  • the second damper unit moves vertically along an inner wall of the outer casing when a stroke of the damper is greater than a preset value.
  • the piston rod has an upper support end and a lower support end, and a rod body extends between the upper support end and the lower support end, and the upper support end and the lower support end protrude from the rod body to Forming the accommodating space between the rod body and an inner wall of the outer casing;
  • the rod between the upper support end and the lower support end also protrudes from the rod body and is provided with a partition.
  • the second damping unit is disposed between the upper support end and the partition;
  • the second damper unit When the stroke of the damper is greater than a preset value, the second damper unit vertically moves along an inner wall of the outer casing under the pushing of the upper support end or the partition.
  • the first damping unit is a damping ring
  • the damper ring is fixedly sleeved on an outer surface of the upper support end, and the damper ring is in contact with an inner wall of the outer casing.
  • the second damping unit is composed of a cage and a damper sleeve, and the cage is a hollow structure in which the upper end and the lower end are not closed;
  • the upper end and the lower end of the cage are respectively bent upward and downward at 90° to form an upper bent portion and a lower bent portion;
  • the damper sleeve is disposed on the outer wall of the cage between the upper bent portion and the lower bent portion;
  • Both the cage and the damper sleeve are divided into two symmetrical sections by a section of their diameter along their axial direction.
  • the two portions of the cage are mounted together to form a cage mounting interface
  • the two portions of the damping sleeve are mounted together to form a damping sleeve mounting interface
  • the cage mounting interface and the damper sleeve mounting interface are staggered.
  • the length D of the first damping unit is 5-25 mm.
  • K is the length of the accommodating space, and a is 0.2-0.8 mm.
  • the invention employs the following technical solutions:
  • a washing machine provided with a damping variable shock absorber as described above.
  • the piston rod of the shock absorber of the present invention is provided with a first damping unit and a second damping unit, the first damping unit moves with the piston rod, and the second damping unit cooperates with the inner wall of the outer casing,
  • the second damping unit moves with respect to the inner wall of the outer casing;
  • the stroke of the damper is greater than a preset value, the second damper unit moves vertically along the inner wall of the outer casing. Since the damper of the present invention has the above structure, the damper can automatically adjust its own damping according to the magnitude of the vibration received during use, effectively reducing the vibration, and improving the vibration damping effect.
  • the washing machine in the invention is provided with the above-mentioned shock absorber, which can adapt to various working conditions of the washing machine during use, effectively alleviate the vibration of the washing machine, reduce the noise in the washing process of the washing machine, and improve the user experience.
  • FIG. 1 is a half cross-sectional structural view of a variable damping damper according to a first embodiment of the present invention
  • Figure 2 is a front elevational view of the piston rod according to the first embodiment of the present invention.
  • FIG. 3 is an exploded structural view of a second damping unit according to Embodiment 1 of the present invention.
  • FIG. 4 is an assembled structural view of a second damping unit according to Embodiment 1 of the present invention.
  • FIG. 1 it is a damping variable shock absorber proposed in the embodiment, comprising a casing 1 and a piston rod 2 disposed in the casing and slidable along the inner wall of the casing 1.
  • a first damping unit 3 is fixedly disposed on the piston rod 2.
  • the first damping unit 3 moves with the piston rod 2 and generates a frictional force with the inner wall of the outer casing 1.
  • the piston rod 2 is further provided with a second damping unit 4.
  • An accommodating space is formed between a portion of the piston rod 2 and the inner wall of the outer casing 1 in the embodiment, and a second damper unit 4 is disposed in the accommodating space to cooperate with the inner wall of the outer casing 1.
  • the second damper unit 4 is along the outer casing 1.
  • the inner wall moves vertically and generates friction with the inner wall of the outer casing 1.
  • the second damper unit 4 moves vertically along the inner wall of the outer casing 1.
  • the preset value of the stroke in this embodiment has a relationship with the structure of the piston rod 2, and can be designed according to the specific use situation of the shock absorber.
  • the length M of the first damper unit 3 is 5-25 mm, preferably, M is 10-15 mm.
  • the piston rod 2 has an upper support end 21 and a lower support end 22, and a rod body 23 extends between the upper support end 21 and the lower support end 22, and the upper support end 21 and the lower end
  • the support end 22 is protruded from the rod body 23 so that an accommodation space is formed between the rod body 23 and the inner wall of the outer casing 1.
  • the rod body 23 between the upper support end 21 and the lower support end 22 also protrudes from the rod body 23 and is provided with a partitioning member 24, and the second damping unit 4 is disposed between the upper support end 21 and the partitioning member 24.
  • the second damper unit 4 When the stroke of the damper is greater than a preset value, the second damper unit 4 is vertically moved along the inner wall of the outer casing 1 under the push of the upper support end 21 or the partition member 24.
  • the piston rod 2 is an integrally formed structure in which the partition member 24 is integrally formed with the upper support end 21, the lower support end 22 and the rod body 23.
  • the first damping unit 3 in this embodiment is a damping ring, and the damping ring is fixedly sleeved on the outer surface of the upper supporting end 21, and the damping ring is in contact with the inner wall of the outer casing 1.
  • the second damper unit 4 is composed of a retainer 41 and a damper sleeve 42, and the retainer 41 has a hollow structure in which the upper end and the lower end are not closed.
  • the upper end and the lower end of the retainer 41 are bent at an angle of 90° upward and downward, respectively, to form an upper bent portion and a lower bent portion. Therefore, the retainer 41 has an I-shaped cross section along its axis.
  • a damping sleeve 42 is disposed on the outer wall of the retainer 41 between the upper bent portion and the lower bent portion, and an interference fit between the retainer 41 and the damper sleeve 42 is provided.
  • the damper sleeve 42 has a half cross section along the axis thereof. It is a rectangle.
  • Both the retainer 41 and the damper sleeve 42 are of a split structure.
  • both the retainer 41 and the damper sleeve 42 are divided into two symmetrical sections by their cross-section in the axial direction.
  • the two portions of the cage 41 are mounted together to form a cage mounting interface.
  • the two portions of the damping sleeve 42 are mounted together to form a damping sleeve mounting interface, and the cage mounting interface and the damping sleeve mounting interface are staggered.
  • the cage 41 and the damper sleeve 42 of the second damper unit 4 are provided in a separate structure for the convenience of installation.
  • the retainer 41 is first mounted to the piston rod 2, and the two portions of the retainer 41 are aligned and snapped together and closed.
  • the damper sleeve 42 is sleeved between the upper bent portion and the lower bent portion, and the two portions of the damper sleeve 42 are aligned and then fastened together, and the two are closely matched to make the cage 41 and the damper sleeve 42 can exercise together.
  • the first damping unit 3 and the second damping unit 4 in this embodiment are each made of high density polyurethane or rubber, but are not limited to the above materials.
  • the damper can automatically adjust its own damping according to the magnitude of the vibration received during use, effectively reducing the vibration and improving the vibration damping effect.
  • the embodiment provides a washing machine provided with a damping variable shock absorber as described in the first embodiment, so that the washing machine in the embodiment can effectively alleviate the vibration generated by various washing programs of the washing machine during the washing process. Reduce the noise during the washing process of the washing machine and improve the user experience.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
  • Fluid-Damping Devices (AREA)
  • Vibration Dampers (AREA)

Abstract

一种阻尼可变的减震器，包括外壳（1）和可沿外壳（1）内壁滑动的活塞杆（2），活塞杆（2）上设置有随活塞杆（2）移动并与外壳（1）的内壁之间产生摩擦力的第一阻尼单元（3）；部分活塞杆（2）与外壳（1）的内壁之间形成有容置空间，容置空间中设置有与外壳（1）的内壁相配合的第二阻尼单元（4），第二阻尼单元（4）沿外壳（1）的内壁竖直移动，并与外壳（1）的内壁之间产生摩擦力；当减震器的行程小于预设值时，第二阻尼单元（4）相对于外壳（1）的内壁固定；当减震器的行程大于预设值时，第二阻尼单元（4）沿外壳（1）的内壁竖直移动。一种洗衣机，包括该阻尼可变的减震器。由于该减震器具有上述结构，因此能够根据使用过程中受到的振动的大小，自动调节自身的阻尼，有效的减小振动，提升减振效果。

Description

一种可变阻尼减震器及洗衣机 技术领域
本发明涉及减震装置及洗衣机领域，更具体的公开了一种在使用过程中根据振动情况能够对减震器的阻尼进行调节的可变阻尼减震器，及设置有该可变阻尼减震器的洗衣机。
背景技术
减震器与弹性元件承担着缓冲击和减振的任务，当阻尼力过大时，容易造成减震器内部的连接件发生损坏；当阻尼过小时，不能够实现减振效果。
减震器能够被应用在洗衣机上，滚筒洗衣机被设计成通过四点减震器制成洗涤筒来吸收洗涤过程中由洗涤筒产生的振动，也就是说，对洗衣机的洗涤筒进行支撑的减震器通过吸收振动来减小由洗涤筒旋转产生的振动并提供用于支撑洗涤筒的保持力，从而不需要诸如悬架等额外的保持构件。
在洗衣机领域中，实际洗涤操作下在正常脱水操作时和过度脱水操作时产生的振动幅度是十分不同的，因而在有效地衰减大幅度和小幅度的振动时受到限制。在现有的滚筒式洗衣机的减振器中，减振的摩擦力在所有的时间基本上是恒定的，无法实现阻尼的变化和调整，如果设置为定阻尼，则当振动过大时，减振效果较差。
因此，市场亟需一种阻尼可变的减震器及具有该减震器的洗衣机，以使得减震器在工作过程中能够根据不同的振动情况自行改变阻尼，有效的减小动，提升减振效果。
发明内容
本发明的一个目的在于，提出一种阻尼可变的减震器，能够在使用过程中 根据外界的振动情况对自身阻尼进行调节，有效的减小振动，提升减振效果。
本发明的另一个目的在于，提出一种洗衣机，该洗衣机上设置有上述阻尼可变的减震器，以解决现有技术中洗衣机工作过程中振动较大的问题。
为达到此目的，一方面，本发明采用以下技术方案：
一种阻尼可变的减震器，包括外壳和设置于外壳内的可沿所述外壳内壁滑动的活塞杆，所述活塞杆上固定设置有第一阻尼单元，所述第一阻尼单元随所述活塞杆移动并与所述外壳的内壁之间产生摩擦力，部分所述活塞杆与所述外壳的内壁之间形成有容置空间，所述容置空间中设置有与所述外壳的内壁相配合的第二阻尼单元，所述第二阻尼单元沿所述外壳的内壁竖直移动，并与所述外壳的内壁之间产生摩擦力；
当所述减震器的行程小于预设值时，所述第二阻尼单元相对于所述外壳的内壁固定；
当所述减震器的行程大于预设值时，所述第二阻尼单元沿所述外壳的内壁竖直移动。
进一步的，所述活塞杆具有上支撑端和下支撑端，所述上支撑端与下支撑端之间延伸有杆体，且所述上支撑端和下支撑端凸出于所述杆体设置，以使所述杆体与所述外壳的内壁之间形成所述容置空间；
所述上支撑端和下支撑端之间的所述杆体上还凸出于所述杆体设置有分隔件。
进一步的，所述第二阻尼单元设置在所述上支撑端与分隔件之间；
当所述减震器的行程大于预设值时，所述第二阻尼单元在所述上支撑端或分隔件的推动下沿所述外壳的内壁竖直移动。
进一步的，所述第一阻尼单元为阻尼环；
所述阻尼环固定套设在所述上支撑端的外表面上，所述阻尼环与所述外壳的内壁相接触。
进一步的，所述第二阻尼单元由保持架和阻尼套构成，所述保持架为上端和下端不封闭的中空结构；
所述保持架的上端和下端分别向上、向下呈90°弯折形成上弯折部和下弯折部；
所述保持架的外壁上，位于所述上弯折部与下弯折部之间套设有所述阻尼套；
所述保持架与阻尼套之间为过盈配合。
进一步的，所述保持架和阻尼套均为分体式结构；
所述保持架和阻尼套均沿其轴线方向被通过其直径的截面分为对称的两部分。
进一步的，所述保持架的两部分安装在一起形成保持架安装接口；
所述阻尼套的两部分安装在一起形成阻尼套安装接口；
所述保持架安装接口与阻尼套安装接口错开设置。
优选的，所述第一阻尼单元的长度M为5-25mm。
优选的，所述第二阻尼单元的长度为L＝a*K；
其中，K为所述容置空间的长度，a为0.2-0.8mm。
另一方面，本发明采用以下技术方案：
一种洗衣机，该洗衣机上设置有如上所述的阻尼可变的减震器。
本发明的有益效果为：本发明中的减震器的活塞杆上设置有第一阻尼单元和第二阻尼单元，第一阻尼单元随活塞杆运动，第二阻尼单元与外壳的内壁相配合，当减震器的行程小于预设值时，第二阻尼单元相对于外壳的内壁固定； 当减震器的行程大于预设值时，第二阻尼单元沿外壳的内壁竖直移动。由于本发明中的减震器具有上述结构，因此该减震器能够根据使用过程中受到的振动的大小，自动调整自身的阻尼，有效的减小振动，提升减振效果。
本发明中的洗衣机上设置有上述减震器，能够适应洗衣机在使用过程中的各种工况，有效缓解洗衣机的振动，降低洗衣机洗涤过程中的噪音，提高用户体验。
附图说明
图1是本发明实施例一提出的阻尼可变的减震器的半剖结构示意图；
图2是本发明实施例一提出的活塞杆主视图；
图3是本发明实施例一提出的第二阻尼单元的***结构图；
图4是本发明实施例一提出的第二阻尼单元的组装结构图。
图中：
1、外壳；2、活塞杆；21、上支撑端；22、下支撑端；23、杆体；24、分隔件；3、第一阻尼单元；4、第二阻尼单元；41、保持架；42、阻尼套。
具体实施方式
下面结合附图并通过具体实施方式来进一步说明本发明的技术方案。
实施例一
如图1所示，是本实施例提出的一种阻尼可变的减震器，包括外壳1和设置于外壳内的可沿外壳1内壁滑动的活塞杆2。活塞杆2上固定设置有第一阻尼单元3，第一阻尼单元3随活塞杆2移动并与外壳1的内壁之间产生摩擦力，活塞杆2上还设置有第二阻尼单元4。
本实施例中部分活塞杆2与外壳1的内壁之间形成有容置空间，容置空间中设置有与外壳1的内壁相配合的第二阻尼单元4，第二阻尼单元4沿外壳1的 内壁竖直移动，并与外壳1的内壁之间产生摩擦力。当减震器的行程小于预设值时，第二阻尼单元4相对于外壳1的内壁固定，当减震器的行程大于预设值时，第二阻尼单元4沿外壳1的内壁竖直移动。本实施例中的行程的预设值，与活塞杆2的结构有关系，可以根据减震器具体的用途情况进行设计。在本实施例中，第一阻尼单元3的长度M为5-25mm，优选的，M为10-15mm。第二阻尼单元4的长度为L＝a*K，其中，K为容置空间的长度，a为0.2-0.8mm，优选的，a为0.3-0.5mm。结合减震器使用过程中的实际情况并结合上述各个参数对预设值进行计算时。
如图2所示，作为更进一步的实施方式，活塞杆2具有上支撑端21和下支撑端22，上支撑端21与下支撑端22之间延伸有杆体23，且上支撑端21和下支撑端22凸出于杆体23设置，以使杆体23与外壳1的内壁之间形成容置空间。上支撑端21和下支撑端22之间的杆体23上还凸出于杆体23设置有分隔件24，第二阻尼单元4设置在上支撑端21与分隔件24之间。当减震器的行程大于预设值时，第二阻尼单元4在上支撑端21或分隔件24的推动下沿外壳1的内壁竖直移动。在本实施例中，活塞杆2为一体成型结构，其中，分隔件24与上支撑端21、下支撑端22和杆体23均一体加工成型。
优选的，本实施例中的第一阻尼单元3为阻尼环，阻尼环固定套设在上支撑端21的外表面上，阻尼环与外壳1的内壁相接触。
如图3、图4所示，第二阻尼单元4由保持架41和阻尼套42构成，保持架41为上端和下端不封闭的中空结构。保持架41的上端和下端分别向上、向下呈90°弯折形成上弯折部和下弯折部，因此，保持架41沿其轴线的半剖截面呈工字形结构。保持架41的外壁上，位于上弯折部与下弯折部之间套设有阻尼套42，保持架41与阻尼套42之间为过盈配合，阻尼套42沿其轴线的半剖截面为矩形。
保持架41和阻尼套42均为分体式结构，优选的，保持架41和阻尼套42均沿其轴线方向被通过其直径的截面分为对称的两部分。保持架41的两部分安装在一起形成保持架安装接口，阻尼套42的两部分安装在一起形成阻尼套安装接口，保持架安装接口与阻尼套安装接口错开设置。
由于本实施例中的活塞杆2上设置有分隔件24，因此，为了安装方便将第二阻尼单元4的保持架41和阻尼套42设置为分体结构。在安装时，首先将保持架41安装到活塞杆2上，将保持架41的两部分对准扣合在一起，并进行封闭。然后将阻尼套42套在上弯折部与下弯折部之间，将阻尼套42的两部分对准后扣合在一起，两者之间为紧密配合，以使保持架41和阻尼套42能一起运动。
优选的，本实施例中的第一阻尼单元3和第二阻尼单元4均由高密度聚亚安酯或橡胶制成，但并不局限在上述材料。
由于本实施例中的减震器的上述结构，因此该减震器能够根据使用过程中受到的振动的大小，自动调整自身的阻尼，有效的减小振动，提升减振效果。
实施例二
本实施例提出了一种洗衣机，该洗衣机上设置有如实施例一中所述的阻尼可变的减震器，从而本实施例中洗衣机能够在洗涤过程中有效缓解洗衣机各种洗涤程序产生的振动，降低洗衣机洗涤过程中的噪音，提高用户体验。
以上结合具体实施例描述了本发明的技术原理，这些描述只是为了解释本发明的原理，不能以任何方式解释为对本发明保护范围的限制。基于此处解释，本领域的技术人员不需要付出创造性的劳动即可联想到本发明的其它具体实施方式，这些方式都将落入本发明的保护范围之内。

Claims (10)

  1. 一种阻尼可变的减震器，包括外壳(1)和设置于外壳(1)内的可沿所述外壳(1)内壁滑动的活塞杆(2)，所述活塞杆(2)上固定设置有第一阻尼单元(3)，所述第一阻尼单元(3)随所述活塞杆(2)移动并与所述外壳(1)的内壁之间产生摩擦力，其特征在于：部分所述活塞杆(2)与所述外壳(1)的内壁之间形成有容置空间，所述容置空间中设置有与所述外壳(1)的内壁相配合的第二阻尼单元(4)，所述第二阻尼单元(4)沿所述外壳(1)的内壁竖直移动，并与所述外壳(1)的内壁之间产生摩擦力；
    当所述减震器的行程小于预设值时，所述第二阻尼单元(4)相对于所述外壳(1)的内壁固定；
    当所述减震器的行程大于预设值时，所述第二阻尼单元(4)沿所述外壳(1)的内壁竖直移动。
  2. 根据权利要求1所述的阻尼可变的减震器，其特征在于：所述活塞杆(2)具有上支撑端(21)和下支撑端(22)，所述上支撑端(21)与下支撑端(22)之间延伸有杆体(23)，且所述上支撑端(21)和下支撑端(22)凸出于所述杆体(23)设置，以使所述杆体(23)与所述外壳(1)的内壁之间形成所述容置空间；
    所述上支撑端(21)和下支撑端(22)之间的所述杆体(23)上还凸出于所述杆体(23)设置有分隔件(24)。
  3. 根据权利要求2所述的阻尼可变的减震器，其特征在于：所述第二阻尼单元设置在所述上支撑端(21)与分隔件(24)之间；
    当所述减震器的行程大于预设值时，所述第二阻尼单元(4)在所述上支撑端(21)或分隔件(24)的推动下沿所述外壳(1)的内壁竖直移动。
  4. 根据权利要求3所述的阻尼可变的减震器，其特征在于：所述第一阻尼 单元(3)为阻尼环；
    所述阻尼环固定套设在所述上支撑端(21)的外表面上，所述阻尼环与所述外壳(1)的内壁相接触。
  5. 根据权利要求1-4任一项所述的阻尼可变的减震器，其特征在于：所述第二阻尼单元(4)由保持架(41)和阻尼套(42)构成，所述保持架(41)为上端和下端不封闭的中空结构；
    所述保持架(41)的上端和下端分别向上、向下呈90°弯折形成上弯折部和下弯折部；
    所述保持架(41)的外壁上，位于所述上弯折部与下弯折部之间套设有所述阻尼套(42)；
    所述保持架(41)与阻尼套(42)之间为过盈配合。
  6. 根据权利要求5所述的阻尼可变的减震器，其特征在于：所述保持架(41)和阻尼套(42)均为分体式结构；
    所述保持架(41)和阻尼套(42)均沿其轴线方向被通过其直径的截面分为对称的两部分。
  7. 根据权利要求6所述的阻尼可变的减震器，其特征在于：所述保持架(41)的两部分安装在一起形成保持架安装接口；
    所述阻尼套(42)的两部分安装在一起形成阻尼套安装接口；
    所述保持架安装接口与阻尼套安装接口错开设置。
  8. 根据权利要求1-4任一项所述的阻尼可变的减震器，其特征在于：所述第一阻尼单元(3)的长度M为5-25mm。
  9. 根据权利要求1-4任一项所述的阻尼可变的减震器，其特征在于：所述第二阻尼单元(4)的长度为L＝a*K；
    其中，K为所述容置空间的长度，a为0.2-0.8mm。
  10. 一种洗衣机，其特征在于：该洗衣机上设置有如权利要求1-9任一项所述的阻尼可变的减震器。
PCT/CN2016/080657 2015-04-30 2016-04-29 一种可变阻尼减震器及洗衣机 WO2016173533A1 (zh)

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