WO2018177102A1 - Vibration damper and laundry machine comprising same - Google Patents

Vibration damper and laundry machine comprising same Download PDF

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Publication number
WO2018177102A1
WO2018177102A1 PCT/CN2018/078358 CN2018078358W WO2018177102A1 WO 2018177102 A1 WO2018177102 A1 WO 2018177102A1 CN 2018078358 W CN2018078358 W CN 2018078358W WO 2018177102 A1 WO2018177102 A1 WO 2018177102A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
chamber
damper
boom
damping
Prior art date
Application number
PCT/CN2018/078358
Other languages
French (fr)
Chinese (zh)
Inventor
赵志强
许升
Original Assignee
青岛海尔洗衣机有限公司
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Filing date
Publication date
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
Publication of WO2018177102A1 publication Critical patent/WO2018177102A1/en

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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
    • F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
    • F16F13/005—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper
    • F16F13/007—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a wound spring and a damper, e.g. a friction damper the damper being a fluid damper
    • 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
    • F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
    • 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
    • F16F9/53—Means for adjusting damping characteristics by varying fluid viscosity, e.g. electromagnetically

Definitions

  • the invention belongs to the technical field of washing machines, and in particular provides a shock absorber and a washing machine including the same.
  • the invention patent application of the publication No. CN1718902A discloses a "damper for a washing machine".
  • the damper for a washing machine includes a cylinder barrel and a piston rod inserted in the cylinder barrel, and an end of the piston rod is provided with a piston that divides the cylinder tube into an upper chamber of the cylinder tube and Cylinder lower chamber.
  • the piston is further provided with a throttle passage that communicates between the upper chamber of the cylinder and the lower chamber of the cylinder.
  • a shock absorber comprising: a cylinder having an inner cavity; a damping block slidably disposed in the inner cavity, dividing the inner cavity into a first chamber and a second a chamber; a third chamber is disposed inside the damping block, and the damping block is provided with a damping hole, and the first chamber and/or the third chamber is filled with a fluid when The fluid flows between the first chamber and the third chamber through the orifice when the damping block slides relative to the cylinder.
  • the shock absorber further includes a boom, a lower end of the boom is coupled to the damping block, a main body portion of the boom passes through the cylinder, and A first sealing ring is disposed between the main body portion of the boom and the cylinder barrel.
  • a second sealing ring is disposed between the lower end of the boom and the damping block.
  • a third sealing ring is further disposed between the outer wall of the damping block and the inner wall of the cylinder.
  • the outer wall of the damper block is provided with a static pressure hole through which the fluid flowing into the third chamber can enter the outer wall of the damper block.
  • the diameter of the static pressure hole is smaller than the diameter of the orifice.
  • the inside of the damper block is provided with a first reinforcing end, and the first reinforcing end is provided with a first through hole, and the boom passes through the first pass
  • the bore is sealingly connected to the damping block by means of the second sealing ring.
  • the inside of the cylinder is provided with a second reinforcing end, and the second reinforcing end is provided with a second through hole through which the main body portion of the boom passes The second through hole is sealingly connected to the cylinder by means of the first sealing ring.
  • the damper further includes a damper spring disposed in the first chamber, the upper end of the damper spring abutting the inner top of the cylinder, The lower end of the damper spring abuts against the damper block.
  • the present invention also provides a washing machine comprising a housing and a washing tub assembly disposed in the housing, wherein the washing machine further comprises a plurality of shock absorbers, wherein the washing tub assembly passes the plurality of subtractions
  • the shock absorber is supported on the housing, at least one of which is a shock absorber according to the present invention.
  • the third chamber is provided in the damping block, the volume of the third chamber is maintained during the telescopic movement of the damping block along the cylinder. No change, when the damping block performs the compression movement, the fluid in the third chamber will gradually increase, so that the pressure in the third chamber gradually increases, and the fluid in the first chamber needs more force to enter the third chamber.
  • the damping force generated by the shock absorber is greater; when the damping block performs the stretching motion, the fluid in the third chamber enters into the first chamber, and the fluid in the third chamber gradually decreases, so that the third chamber The negative pressure in the chamber increases, causing the damping force of the fluid in the third chamber to enter the first chamber to become larger. Therefore, in the damper of the present invention, as the stroke of the damper block in the cylinder tube increases, the damping force it receives is also increased, thereby further enhancing the shock absorbing effect of the damper.
  • the damper of the present invention can automatically adjust the fluid damping according to the operating condition of the washing machine, and in the case of a large load, especially when the dehydration is high at a low speed, the stroke of the damper block in the cylinder increases. Large, the damping force is increased, the shock absorption is enhanced, and the stability of the washing machine is maintained; when the load is small, the shock absorber is in low damping, especially at the high speed of the drying, as the stroke of the damping block in the cylinder is reduced, The damping force is reduced to maintain the stability of the washing machine.
  • the outer wall of the damping block is provided with a static pressure hole on the circumference of the outer wall, and the pressure fluid entering the third chamber through the damping hole flows out along the static pressure hole on the outer wall of the damping block, and is flooded in the damping.
  • the gap between the outer wall of the block and the inner wall of the cylinder causes the outer wall of the damping block to form a hydrostatic bearing with the inner wall of the cylinder so that the entire circumference of the damping block is set regardless of the angle at which the shock absorber is disposed in the washing machine
  • the pressure on the outer wall is uniform and avoids the eccentric wear of the damping block.
  • Figure 1 is a schematic view showing the installation position of the shock absorber of the present invention
  • Figure 2 is a perspective view showing the structure of the shock absorber of the present invention.
  • Figure 3 is a front elevational view showing the shock absorber of the present invention.
  • Figure 4 is a cross-sectional structural view of the shock absorber of the first embodiment of the present invention taken along line A-A of Figure 3;
  • Figure 5 is a cross-sectional structural view of the damper of the second embodiment of the present invention taken along line A-A of Figure 3;
  • Figure 6 is a cross-sectional structural view of the shock absorber with a sealing ring in the direction of A-A in Figure 3 according to the second embodiment of the present invention
  • Figure 7 is a cross-sectional structural view showing a preloaded state of a damper spring according to a second embodiment of the present invention.
  • Figure 8 is a cross-sectional structural view showing a compressed state of a damper spring according to a second embodiment of the present invention.
  • Fig. 9 is a cross-sectional structural view showing the state in which the damper spring is extended in the second embodiment of the present invention.
  • the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be fixed connections, for example, or It is a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be internal communication between the two elements.
  • the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
  • FIG. 1 there is shown a schematic view of the mounting position of the shock absorber of the present invention.
  • the upper end of the shock absorber is coupled to the outer casing 10 of the washing machine, and the lower end is coupled to the bottom of the washtub assembly disposed within the washing machine; wherein the washtub assembly includes an inner cylinder 13 and an outer cylinder 14
  • the damper directly suspends the outer cylinder 14, but it also carries the weight of the inner cylinder 13, and is therefore used to reduce the vibration generated by the inner cylinder 13.
  • the drum assembly may also be a washing tub of other types of washing machines such as a drum washing machine.
  • the damper includes a boom 5, and the upper end of the boom 5 is provided with a boom hanger 50, and the boom hanger 50 is connected with a hanging corner 19 connected to the outer casing 10; the outer outer wall of the outer cylinder 14
  • the outer cylinder hanger 15 is extended outwardly; the outer cylinder hanger 15 is provided with a through hole, and the top portion 28 of the cylinder 2 of the damper passes through the through hole and is fixedly connected with the outer cylinder hanger 15 .
  • the washing machine of this embodiment further includes an upper cover assembly 11 disposed at the upper end of the outer casing 10, a drive motor 17 disposed at the bottom of the outer cylinder 14, a drive shaft 16 coupled to the drive motor 17, and an output of the drive shaft 16.
  • the end is connected to the inner cylinder 13 and drives its rotation;
  • the washing machine further includes a foot 18 supporting the washing machine and a balance ring 12 disposed at the upper end of the inner cylinder 13.
  • the outer cylinder 14 of the pulsator washing machine of the embodiment of the invention is used for holding the washing water, the inner cylinder 13 can be rotated, or a pulsator (not shown) is arranged at the bottom of the inner cylinder, and the pulsator rotates to realize the stirring and washing of the clothes;
  • the drive motor 17 drives the inner cylinder or the pulsator to rotate by the drive shaft 16; the upper cover assembly 11 is used to insert or take out the laundry; the foot 18 is used to support the entire washing machine.
  • FIG. 2 is a schematic perspective view of a shock absorber of the present invention
  • FIG. 3 is a front view of the shock absorber of the present invention.
  • the damper of the present embodiment includes a boom hanger 50 disposed at the upper end, a sealed cylinder 2 disposed at the lower end, and a connection between the boom hanger 50 and the cylinder 2 The boom 5; wherein the cylinder 2 is shock-absorbing by means of a double damping of the damping spring and the damping block.
  • the boom 5 of the embodiment of the present invention is a steel wire or a steel bar, and may be other materials capable of satisfying the support requirements.
  • a steel wire having a diameter of 2-6 mm is used.
  • the lower end surface of the boom hanger 50 of the embodiment of the present invention has a circular arc surface; in order to be connectable with the boom 5, the lower end of the boom hanger 50 is a connecting cylinder for covering the boom 5 501.
  • the connecting cylinder 501 is integrally formed with the boom hanger 50 or connected separately.
  • the embodiment of the present invention is damped by an elastic damper suspended from the outer casing 10, that is, four outer hangers 14 are used to hang the outer tub 14 at the four corners of the outer casing 10.
  • the boom 5 is a steel wire, and the upper portion is hung on the boom hanger 50, and the boom hanger 50 can be rotated.
  • the four booms 5 receive the entire weight of the drum assembly through the cylinder 2, and the weight of the drum assembly compresses the damping springs in the cylinder 2.
  • the amount of compression of the damper spring is different due to the difference in the water in the barrel, and the height of the barrel is also different.
  • the cylinder 2 swings around the boom hanger 50 on the one hand, and slides up and down along the boom 5 on the other hand, so as to absorb vibration energy and reduce vibration of the washing machine caused by the vibration of the drum assembly. Keep the whole machine running smoothly.
  • FIG. 4 is a cross-sectional structural view of the shock absorber according to the AA direction of FIG. 3 according to the first embodiment of the present invention.
  • the inside of the boom hanger 50 is a through hole, and the boom 5 is worn.
  • the through hole is passed through and fixed to the upper end of the boom hanger 50.
  • the upper end of the boom 5 is bent to form a boom elbow 51, and the boom elbow 51 is in contact with the upper end surface of the boom hitch 50, and is connected by welding and other fixed means for reinforcement.
  • the strength of the connection between the boom 5 and the boom hanger 50 prevents the boom 5 from being disengaged from the boom hanger 50 when compressed or stretched.
  • the lower end of the cylinder barrel 2 is closed by a sealing cover 20, the upper end is open, and the boom 5 extends into the interior of the cylinder barrel 2 through the upper end opening and moves up and down within the cylinder barrel 2.
  • the lower end of the boom 5 is connected to a damping block 3 provided in the cylinder 2, and the damping block 3 is fixed to the boom 5 and is movable up and down along the cylinder 2 to achieve buffering of the boom 5.
  • a first reinforcing end 37 is disposed inside the damping block 3, and a vertical through hole is opened in the middle portion of the first reinforcing end 37.
  • the boom 5 passes through the through hole, and the lower end of the boom 5 is provided with a boom cap 52.
  • the boom cap 52 is in contact with the first reinforcing end 37 to play the role of positioning and limiting the damping block 3;
  • the damper block 3 is moved upward, the boom cap 52 is brought into contact with the bottom surface of the first reinforcing end 37 to achieve the restriction of the damper block 3.
  • the outer diameter of the boom cap 52 at the lower end of the boom 5 is larger than the inner diameter of the through hole, on the one hand, the positioning of the boom 5 is achieved, and on the other hand, the damping block 3 cannot be detached from the boom 5.
  • a first seal ring 36 is disposed at a joint of the boom 5 and the damper block 3, and a first seal ring mounting groove for accommodating the first seal ring 36 is disposed in the first reinforcement end 37.
  • the mounting groove can also be opened on the outer wall of the boom 5.
  • a third matching gap 35 is left between the damping block 3 and the boom 5; by providing a first sealing ring 36 and a third matching gap 35 between the boom 5 and the damping block 3, A dynamic seal can be formed between the two so that the boom 5 and the damping block 3 can slide relative to each other.
  • the boom 5 and the damping block 3 may be arranged to be fixedly connected to each other such that when the damping block 3 slides up and down within the cylinder 2, the boom 5 and the damping block 3 serve as one
  • this structure is simpler and the production cost is lower.
  • the inner top of the cylinder 2 is provided with a second reinforcing end 26, the second reinforcing end 26 and the side of the cylinder 2
  • the wall is integrally formed, and the second reinforcing end 26 is provided with a vertically penetrating through hole for the hanger 5 to pass through; in order to ensure the sealing performance of the cylinder 2, the first portion of the connection between the boom 5 and the cylinder 2 is provided.
  • the second sealing ring 25 is provided with a second sealing ring mounting groove for receiving the second sealing ring 25 therein. Similar to the first seal ring mounting groove, the second seal ring mounting groove can also be formed on the outer wall of the boom 5.
  • the damping block 3 divides the inner cavity of the cylinder 2 into an upper first chamber 21 and a lower second chamber 22, wherein the first chamber 21 is filled with hydraulic oil 4.
  • a first matching gap 33 is left between the outer wall of the damping block 3 and the inner side wall of the cylinder 2; meanwhile, the damping block 3 and the cylinder 2 are also provided with
  • the third seal ring 32 forms a dynamic seal between the two.
  • the third seal ring 32 may be disposed in a groove on the outer wall of the damper block 3 or in a groove on the inner wall of the cylinder tube 2.
  • the hydraulic oil 4 may be various oils or greases, and the viscosity may be of various grades.
  • the inside of the damping block 3 is provided with a third chamber 31, and the upper end of the damping block 3 is provided with a damping hole 34, and the damping hole 34 will be the first chamber above the damping block 3.
  • 21 is in communication with the third chamber 31 inside the damping block 3, and the hydraulic oil 4 between the two chambers can flow to each other.
  • the damping liquid can flow from the first chamber 21 into the third chamber 31, or from the third chamber 31 into the first chamber 21, thereby generating fluid damping, achieving the effect of cushioning shock absorption.
  • the damper of the present invention can automatically adjust the fluid damping according to the operating condition of the washing machine, and in the case of a large load, especially when the dehydration is high at a low speed, the stroke of the damper block in the cylinder increases.
  • a damper spring 23 is further disposed in the first chamber 21, the upper end of the damper spring 23 is connected to the inner side wall of the cylinder barrel 2, and the lower end is connected to the upper portion of the damper block 3.
  • the spring of this embodiment is made of an elastic material such as steel wire or steel bar.
  • FIG. 5 is a cross-sectional structural view of the damper according to Embodiment 2 of the present invention taken along line AA of FIG. 3;
  • FIG. 6 is a damper with a sealing ring according to Embodiment 2 of the present invention.
  • the second embodiment is different from the first embodiment described above in that the outer wall of the damping block 3 has a static pressure hole 38 formed therein.
  • the diameter of the static pressure hole 38 is smaller than the diameter of the damping hole 34; and the inside of the damping block 3 is entered.
  • the pressurized liquid flows out along the static pressure hole 38 on the outer wall of the damping block, and is filled in the gap 33 between the damping block 3 and the cylinder 2, so that the outer wall of the damping block 3 and the inner wall of the cylinder 2 form a static pressure.
  • the effect of the bearing is such that the friction between the damping mass 3 and the cylinder 2 is more uniform over the entire circumference.
  • the boom 5 is generally inclined, inevitably causing the damping block 3 to withstand different magnitudes of force in the circumferential direction, causing partial wear or even failure of the damping block 3; however, the present invention is provided by
  • the static pressure hole 38 achieves the effect of the hydrostatic bearing, effectively avoiding the occurrence of this problem.
  • the number and diameter of the static pressure holes 38 can be arbitrarily selected according to the needs of practical applications, but the diameter of the static pressure holes 38 should be smaller than the diameter of the damping holes 34 as a whole.
  • the first sealing ring is not disposed between the outer wall of the damping block 3 and the inner wall of the cylinder 2, but the above functions can still be achieved, except that the hydraulic oil 4 in the third chamber 31 is somewhat permeable. Leaks into the second chamber 22. Therefore, an embodiment in which the seal ring 32 is provided in Fig. 6 is more preferable, which can ensure the effect of the hydrostatic bearing as well as the leakage of the hydraulic oil into the second chamber 22.
  • FIG. 7 is a cross-sectional structural view showing a spring state of a damper spring according to a second embodiment of the present invention
  • FIG. 8 is a cross-sectional structural view showing a compressed state of a damper spring according to a second embodiment of the present invention
  • Fig. 9 is a cross-sectional structural view showing the state in which the damper spring is extended in the second embodiment of the present invention.
  • the working process of the second embodiment is described in the following steps.
  • the working process of the first embodiment is the same as that of the second embodiment, and details are not described herein again.
  • the spring 23 when the laundry and/or water is put into the washing machine, the spring 23 is in a pre-pressing state. After starting the operation, the damper spring 23 is further compressed, the damper block 3 is moved upward, and the volume of the first chamber 21 is reduced. Small, the second chamber 22 is increased in volume; part of the hydraulic oil 4 enters the third chamber 31 through the orifice 34, and is filled by the static pressure hole 38 to the first between the outer wall of the damping block 3 and the inner side wall of the cylinder 2. Fit the gap 33.
  • the maximum design safety distance at which the damping block 3 continues to move up is Hmax.
  • the maximum upward movement distance of the damping block 3 during the entire washing and dehydrating cycle is H, and the maximum downward movement is H; preferably H ⁇ Hmax.
  • the state shown in FIG. 8 is that the outer cylinder of the washing machine sinks to the maximum amplitude, the spring 23 is at the maximum deformation compression, and the damping block 3 is in the maximum displacement state along the A direction in the figure, and the boom 5 is at this time.
  • the stroke extending from the cylinder 2 is H
  • the entire damper is extended by H
  • the entire outer cylinder is moved down by H.
  • the state shown in FIG. 9 is that the cylinder 2 is moved up to the maximum amplitude, the spring 23 is restored to the maximum length, and the damping block 3 is in the state of maximum displacement in the direction of the figure B; at this time, the boom 5 is toward the cylinder 2
  • the entire shock absorber is shortened by H, and the entire outer cylinder is moved up by H.
  • the boom 5 pulls the damping block 3 to move in the B direction, under the action of the boom 5, the volume of the first chamber 21 in the cylinder 2 becomes maximum, and the hydraulic oil 4 will move in the -B direction.

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

Abstract

A vibration damper comprises: a cylinder (2), having an inner cavity; and a damping block (3), slidably disposed in the inner cavity and dividing the inner cavity into a first chamber (21) and a second chamber (22). The vibration damper is characterized in that a third chamber (31) is disposed inside the damping block (3), damping holes (34) are provided on the damping block (3), the first chamber (21) and/or the third chamber (31) are filled with fluid, and when the damping block (3) slides relative to the cylinder (2), the fluid flows between the first chamber (21) and the third chamber (31) through the damping holes. The vibration damper can self-adaptively adjust the damping according to the vibration amplitude and enables the movement of a damping block (3) in a cylinder (2) through static pressure holes, thus achieving the effect of a static pressure bearing.

Description

减震器和包括该减震器的洗衣机Shock absorber and washing machine including the same 技术领域Technical field
本发明属于洗衣机技术领域，具体提供一种减震器和包括该减震器的洗衣机。The invention belongs to the technical field of washing machines, and in particular provides a shock absorber and a washing machine including the same.
背景技术Background technique
现有洗衣机不管是波轮洗衣机还是滚筒洗衣机，在运转过程中总会产生令人不愉快的振动和噪声，对消费者产生不必要的干扰和困挠，引起一系列的抱怨。如何优化降低洗衣机的振动和噪音，对消费者来讲是一项非常亟待解决的问题。Existing washing machines, whether they are pulsating washing machines or drum washing machines, always produce unpleasant vibrations and noises during operation, causing unnecessary interference and trouble to consumers, causing a series of complaints. How to optimize the vibration and noise of the washing machine is a very urgent problem for consumers.
在解决洗衣机工作时振动和噪音过大的问题上，公开号为CN1718902A的发明专利申请公开了一种“洗衣机用阻尼器”。具体而言，该洗衣机用阻尼器包括缸筒和插设在所述缸筒中的活塞杆，所述活塞杆的端部设置有活塞，所述活塞将所述缸筒划分为缸筒上室和缸筒下室。另外，所述活塞上还设置有连通所述缸筒上室和所述缸筒下室的节流通路。在所述缸筒上室和所述缸筒下室中注入流体，所述柱塞在滑动过程中，所述流体会通过所述节流通道在所述缸筒上室和缸筒下室之间流动，从而产生流体阻尼，实现减小洗衣机振动的目的。但是，当所述活塞杆在缸筒内往复运动时，所述缸筒上室和所述缸筒下室的体积相应地增大或减小，腔室之间的压差不能够产生自适应调整，以便增强所述阻尼器产生的阻尼力，尤其对于较剧烈的振动，其减震效果差。In the case of solving the problem of excessive vibration and noise during the operation of the washing machine, the invention patent application of the publication No. CN1718902A discloses a "damper for a washing machine". Specifically, the damper for a washing machine includes a cylinder barrel and a piston rod inserted in the cylinder barrel, and an end of the piston rod is provided with a piston that divides the cylinder tube into an upper chamber of the cylinder tube and Cylinder lower chamber. Further, the piston is further provided with a throttle passage that communicates between the upper chamber of the cylinder and the lower chamber of the cylinder. Injecting fluid into the upper chamber of the cylinder and the lower chamber of the cylinder, the fluid passing through the throttle passage in the upper chamber of the cylinder and the lower chamber of the cylinder during the sliding process Flowing between them, thereby generating fluid damping, achieving the purpose of reducing vibration of the washing machine. However, when the piston rod reciprocates within the cylinder, the volume of the upper chamber of the cylinder and the lower chamber of the cylinder are correspondingly increased or decreased, and the pressure difference between the chambers cannot be adaptive. Adjusted to enhance the damping force generated by the damper, especially for more severe vibrations, the damping effect is poor.
此外，在CN1718902A的阻尼器中，只有活塞的外缘与缸筒内壁接触，使用一段时间之后，活塞容易在缸筒内发生偏斜，不容易在活塞与缸筒内壁之前形成均匀的滑动接触，从而产生“偏磨”问题。In addition, in the damper of CN1718902A, only the outer edge of the piston is in contact with the inner wall of the cylinder. After a period of use, the piston is easily deflected in the cylinder, and it is not easy to form a uniform sliding contact between the piston and the inner wall of the cylinder. This creates a "biased" problem.
相应地，本领域需要一种新型减震器来解决上述问题。Accordingly, there is a need in the art for a new shock absorber to address the above problems.
发明内容Summary of the invention
为了解决现有技术中的上述问题，即为了解决现有减震器在工作过程中腔室之间的压差不能够产生自适应调整以及结构复杂、容易发生偏磨等问题，本发明提供了一种减震器，该减震器包括：缸筒， 其具有内腔；阻尼块，其以可滑动方式设置在所述内腔中，将所述内腔分隔成第一腔室和第二腔室；所述阻尼块的内部设置有第三腔室，并且所述阻尼块上开设有阻尼孔，所述第一腔室和/或所述第三腔室中填充有流体，当所述阻尼块相对于所述缸筒滑动时，所述流体通过所述阻尼孔在所述第一腔室和第三腔室之间流动。In order to solve the above problems in the prior art, in order to solve the problem that the pressure difference between the chambers of the existing damper during operation cannot be adaptively adjusted, the structure is complicated, the eccentric wear is easy, and the like, the present invention provides A shock absorber comprising: a cylinder having an inner cavity; a damping block slidably disposed in the inner cavity, dividing the inner cavity into a first chamber and a second a chamber; a third chamber is disposed inside the damping block, and the damping block is provided with a damping hole, and the first chamber and/or the third chamber is filled with a fluid when The fluid flows between the first chamber and the third chamber through the orifice when the damping block slides relative to the cylinder.
在上述的减震器的优选技术方案中，所述减震器还包括吊杆，所述吊杆的下端与所述阻尼块连接，所述吊杆的主体部分穿过所述缸筒，并且所述吊杆的主体部分与所述缸筒之间设置有第一密封圈。In a preferred embodiment of the shock absorber described above, the shock absorber further includes a boom, a lower end of the boom is coupled to the damping block, a main body portion of the boom passes through the cylinder, and A first sealing ring is disposed between the main body portion of the boom and the cylinder barrel.
在上述的减震器的优选技术方案中，所述吊杆的下端与所述阻尼块之间设置有第二密封圈。In a preferred embodiment of the shock absorber described above, a second sealing ring is disposed between the lower end of the boom and the damping block.
在上述的减震器的优选技术方案中，所述阻尼块的外壁与所述缸筒的内壁之间还设置有第三密封圈。In a preferred embodiment of the shock absorber described above, a third sealing ring is further disposed between the outer wall of the damping block and the inner wall of the cylinder.
在上述的减震器的优选技术方案中，所述阻尼块的外壁上开设有静压孔，流入所述第三腔室的流体能够通过所述静压孔进入所述阻尼块的外壁与所述缸筒的内壁之间的间隙。In a preferred embodiment of the damper, the outer wall of the damper block is provided with a static pressure hole through which the fluid flowing into the third chamber can enter the outer wall of the damper block. The gap between the inner walls of the cylinder.
在上述的减震器的优选技术方案中，所述静压孔的直径小于所述阻尼孔的直径。In a preferred embodiment of the shock absorber described above, the diameter of the static pressure hole is smaller than the diameter of the orifice.
在上述的减震器的优选技术方案中，所述阻尼块的内部设置有第一加强端，所述第一加强端上开设有第一通孔，所述吊杆穿过所述第一通孔并借助所述第二密封圈与所述阻尼块密封连接。In a preferred embodiment of the damper, the inside of the damper block is provided with a first reinforcing end, and the first reinforcing end is provided with a first through hole, and the boom passes through the first pass The bore is sealingly connected to the damping block by means of the second sealing ring.
在上述的减震器的优选技术方案中，所述缸筒的内部设置有第二加强端，所述第二加强端上开设有第二通孔，所述吊杆的主体部分穿过所述第二通孔并借助所述第一密封圈与所述缸筒密封连接。In a preferred embodiment of the shock absorber, the inside of the cylinder is provided with a second reinforcing end, and the second reinforcing end is provided with a second through hole through which the main body portion of the boom passes The second through hole is sealingly connected to the cylinder by means of the first sealing ring.
在上述的减震器的优选技术方案中，所述减震器还包括设置在所述第一腔室内的减震弹簧，所述减震弹簧的上端抵靠所述缸筒的内顶部，所述减震弹簧的下端抵靠所述阻尼块。In a preferred embodiment of the damper, the damper further includes a damper spring disposed in the first chamber, the upper end of the damper spring abutting the inner top of the cylinder, The lower end of the damper spring abuts against the damper block.
本发明还提供一种洗衣机，包括壳体和设置于壳体中的洗衣筒总成，其特征在于，所述洗衣机还包括多个减震器，所述洗衣筒总成通过所述多个减震器支撑在所述壳体上，所述减震器中的至少一个为根据本发明所述的减震器。The present invention also provides a washing machine comprising a housing and a washing tub assembly disposed in the housing, wherein the washing machine further comprises a plurality of shock absorbers, wherein the washing tub assembly passes the plurality of subtractions The shock absorber is supported on the housing, at least one of which is a shock absorber according to the present invention.
本领域技术人员能够理解的是，在本发明的技术方案中，由于阻尼块中设有第三腔室，因此，在阻尼块沿缸筒作伸缩运动的过程 中，第三腔室的体积保持不变，当阻尼块做压缩运动时，第三腔室内的流体会逐渐增多，使第三腔室内的压力逐渐增大，第一腔室中的流体进入第三腔室需要更大的力，从而使减震器产生的阻尼力更大；当阻尼块做拉伸运动时，第三腔室中的流体会进入到第一腔室中，第三腔室的流体逐渐减少，使得第三腔室中的负压增大，导致第三腔室内的流体进入第一腔室受到的阻尼力变大。因此，本发明的减震器中，随着阻尼块在缸筒内的行程增大，其受到的阻尼力也在越来越大，从而进一步增强减震器的减震效果。换句话说，本发明的减震器能够根据洗衣机的运行工况自动调整流体阻尼，在大负载情况下尤其是在脱水由低速上高速的情况下，随着阻尼块在缸筒内的行程增大，阻尼力变大，增强减震，保持洗衣机的稳定性；在小负载时，减震器处于低阻尼，尤其是在甩干高速时，随着阻尼块在缸筒内的行程减小，阻尼力变小，保持洗衣机的稳定性。It can be understood by those skilled in the art that in the technical solution of the present invention, since the third chamber is provided in the damping block, the volume of the third chamber is maintained during the telescopic movement of the damping block along the cylinder. No change, when the damping block performs the compression movement, the fluid in the third chamber will gradually increase, so that the pressure in the third chamber gradually increases, and the fluid in the first chamber needs more force to enter the third chamber. Thereby, the damping force generated by the shock absorber is greater; when the damping block performs the stretching motion, the fluid in the third chamber enters into the first chamber, and the fluid in the third chamber gradually decreases, so that the third chamber The negative pressure in the chamber increases, causing the damping force of the fluid in the third chamber to enter the first chamber to become larger. Therefore, in the damper of the present invention, as the stroke of the damper block in the cylinder tube increases, the damping force it receives is also increased, thereby further enhancing the shock absorbing effect of the damper. In other words, the damper of the present invention can automatically adjust the fluid damping according to the operating condition of the washing machine, and in the case of a large load, especially when the dehydration is high at a low speed, the stroke of the damper block in the cylinder increases. Large, the damping force is increased, the shock absorption is enhanced, and the stability of the washing machine is maintained; when the load is small, the shock absorber is in low damping, especially at the high speed of the drying, as the stroke of the damping block in the cylinder is reduced, The damping force is reduced to maintain the stability of the washing machine.
此外，在本发明的优选技术方案中，阻尼块的外壁圆周上开设有静压孔，通过阻尼孔进入第三腔室的压力流体会沿着阻尼块外壁上的静压孔流出，充斥在阻尼块外壁与缸筒内壁之间的间隙中，使阻尼块的外壁与缸筒的内壁形成静压轴承的效果，使得无论所述减震器在洗衣机中以何种角度设置，阻尼块的整个周向外壁上受到的压力都是均匀的，避免阻尼块偏磨问题。In addition, in a preferred embodiment of the present invention, the outer wall of the damping block is provided with a static pressure hole on the circumference of the outer wall, and the pressure fluid entering the third chamber through the damping hole flows out along the static pressure hole on the outer wall of the damping block, and is flooded in the damping. The gap between the outer wall of the block and the inner wall of the cylinder causes the outer wall of the damping block to form a hydrostatic bearing with the inner wall of the cylinder so that the entire circumference of the damping block is set regardless of the angle at which the shock absorber is disposed in the washing machine The pressure on the outer wall is uniform and avoids the eccentric wear of the damping block.
附图说明DRAWINGS
图1是本发明的减震器的安装位置示意图；Figure 1 is a schematic view showing the installation position of the shock absorber of the present invention;
图2是本发明的减震器的立体结构示意图；Figure 2 is a perspective view showing the structure of the shock absorber of the present invention;
图3是本发明的减震器的正视结构示意图；Figure 3 is a front elevational view showing the shock absorber of the present invention;
图4是本发明实施例一的减震器沿图3中A-A向的剖视结构示意图；Figure 4 is a cross-sectional structural view of the shock absorber of the first embodiment of the present invention taken along line A-A of Figure 3;
图5是本发明实施例二的减震器沿图3中A-A向的剖视结构示意图；Figure 5 is a cross-sectional structural view of the damper of the second embodiment of the present invention taken along line A-A of Figure 3;
图6是本发明实施例二的具有密封圈的减震器沿图3中A-A向的剖视结构示意图；Figure 6 is a cross-sectional structural view of the shock absorber with a sealing ring in the direction of A-A in Figure 3 according to the second embodiment of the present invention;
图7是本发明实施例二的减震器弹簧预压状态的剖视结构示意图；Figure 7 is a cross-sectional structural view showing a preloaded state of a damper spring according to a second embodiment of the present invention;
图8是本发明实施例二的减震器弹簧压缩状态的剖视结构示意图；Figure 8 is a cross-sectional structural view showing a compressed state of a damper spring according to a second embodiment of the present invention;
图9是本发明实施例二的减震器弹簧伸长状态的剖视结构示意图。Fig. 9 is a cross-sectional structural view showing the state in which the damper spring is extended in the second embodiment of the present invention.
具体实施方式detailed description
下面参照附图来描述本发明的优选实施方式。本领域技术人员应当理解的是，这些实施方式仅仅用于解释本发明的技术原理，并非旨在限制本发明的保护范围。例如，尽管说明书中是结合液压油来描述的，但是，本发明显然可以采用其他形式的具有一定粘稠度的流体，只要该流体本身不会对阻尼块和缸筒造成腐蚀即可。此外，尽管本申请是结合波轮洗衣机描述的，但是，本发明的技术方案并不局限于此，其也可应用于其他洗衣机，例如滚筒洗衣机，这种改变并不偏离本发明的原理和范围。Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the scope of the present invention. For example, although the description has been described in connection with hydraulic oil, it is apparent that other forms of fluid having a certain viscosity can be employed in the present invention as long as the fluid itself does not corrode the damping block and the cylinder. Further, although the present application has been described in connection with a pulsator washing machine, the technical solution of the present invention is not limited thereto, and it is also applicable to other washing machines, such as a drum washing machine, and such changes do not deviate from the principle and scope of the present invention. .
需要说明的是，在本发明的描述中，术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方向或位置关系的术语是基于附图所示的方向或位置关系，这仅仅是为了便于描述，而不是指示或暗示所述装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。It should be noted that, in the description of the present invention, the terms of the directions of "upper", "lower", "left", "right", "inside", "outside", etc. are indicated based on the drawings. The illustrated orientation or positional relationship is merely for convenience of description, and is not intended to suggest or imply that the device or component must have a particular orientation, configuration and operation in a particular orientation, and thus is not to be construed as limiting the invention. Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
此外，还需要说明的是，在本发明的描述中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域技术人员而言，可根据具体情况理解上述术语在本发明中的具体含义。In addition, it should be noted that in the description of the present invention, the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed connections, for example, or It is a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be internal communication between the two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.
首先参阅图1，其为本发明的减震器的安装位置示意图。在本发明的实施例中，减震器的上端连接在洗衣机的外壳10上，下端与设置在洗衣机内的洗衣筒总成的底部连接；其中，洗衣筒总成包括内筒13和外筒14，减震器直接悬挂外筒14，但其同时也承载内筒13的重量，并因此用于削减内筒13所产生的振动。此外，尽管图中显示的 是波轮洗衣机的洗衣筒总成，但是，该洗衣筒总成也可以是诸如滚筒洗衣机等其他类型的洗衣机的洗衣筒。Referring first to Figure 1, there is shown a schematic view of the mounting position of the shock absorber of the present invention. In an embodiment of the invention, the upper end of the shock absorber is coupled to the outer casing 10 of the washing machine, and the lower end is coupled to the bottom of the washtub assembly disposed within the washing machine; wherein the washtub assembly includes an inner cylinder 13 and an outer cylinder 14 The damper directly suspends the outer cylinder 14, but it also carries the weight of the inner cylinder 13, and is therefore used to reduce the vibration generated by the inner cylinder 13. Further, although the figure shows a drum assembly of a pulsator washing machine, the drum assembly may also be a washing tub of other types of washing machines such as a drum washing machine.
继续参阅图1，减震器包括吊杆5，吊杆5的上端设置有吊杆挂头50，吊杆挂头50与连接在外壳10上的挂角19连接；外筒14的底部外侧壁向外延伸形成外筒挂耳15；外筒挂耳15上开设有通孔，减震器的缸筒2的顶部28穿过该通孔，并与外筒挂耳15连接固定。1, the damper includes a boom 5, and the upper end of the boom 5 is provided with a boom hanger 50, and the boom hanger 50 is connected with a hanging corner 19 connected to the outer casing 10; the outer outer wall of the outer cylinder 14 The outer cylinder hanger 15 is extended outwardly; the outer cylinder hanger 15 is provided with a through hole, and the top portion 28 of the cylinder 2 of the damper passes through the through hole and is fixedly connected with the outer cylinder hanger 15 .
如图1所示，本实施例的洗衣机还包括设置在外壳10上端的上盖组件11、设置在外筒14的底部的驱动电机17、与驱动电机17连接的传动轴16，传动轴16的输出端与内筒13连接，并驱动其转动；该洗衣机还包括支撑洗衣机的地脚18以及设置在内筒13上端的平衡环12。本发明实施例的波轮洗衣机的外筒14用于盛放洗涤水，内筒13可以旋转，或者内筒底部设置波轮(图中未示出)，波轮旋转，实现对衣物搅拌洗涤；驱动电机17通过传动轴16驱动所述内筒或者波轮转动；上盖组件11用于在打开时放入或者取出洗涤衣物；地脚18用于支撑整个洗衣机。As shown in Fig. 1, the washing machine of this embodiment further includes an upper cover assembly 11 disposed at the upper end of the outer casing 10, a drive motor 17 disposed at the bottom of the outer cylinder 14, a drive shaft 16 coupled to the drive motor 17, and an output of the drive shaft 16. The end is connected to the inner cylinder 13 and drives its rotation; the washing machine further includes a foot 18 supporting the washing machine and a balance ring 12 disposed at the upper end of the inner cylinder 13. The outer cylinder 14 of the pulsator washing machine of the embodiment of the invention is used for holding the washing water, the inner cylinder 13 can be rotated, or a pulsator (not shown) is arranged at the bottom of the inner cylinder, and the pulsator rotates to realize the stirring and washing of the clothes; The drive motor 17 drives the inner cylinder or the pulsator to rotate by the drive shaft 16; the upper cover assembly 11 is used to insert or take out the laundry; the foot 18 is used to support the entire washing machine.
下面参阅图2和3，图2为本发明的减震器的立体结构示意图；图3为本发明的减震器的正视结构示意图。如图2和3所示，本实施例的减震器包括设置在上端的吊杆挂头50、设置在下端的密封的缸筒2、以及连接在吊杆挂头50和缸筒2之间的吊杆5；其中，缸筒2通过减震弹簧和阻尼块的双重减震方式实现减震。2 and 3, FIG. 2 is a schematic perspective view of a shock absorber of the present invention; and FIG. 3 is a front view of the shock absorber of the present invention. As shown in FIGS. 2 and 3, the damper of the present embodiment includes a boom hanger 50 disposed at the upper end, a sealed cylinder 2 disposed at the lower end, and a connection between the boom hanger 50 and the cylinder 2 The boom 5; wherein the cylinder 2 is shock-absorbing by means of a double damping of the damping spring and the damping block.
本发明实施例的吊杆5为钢丝或者钢筋，也可以为其它能够满足支撑要求的材质，本发明的优选实施例中采用直径2-6mm之间的钢丝制作。The boom 5 of the embodiment of the present invention is a steel wire or a steel bar, and may be other materials capable of satisfying the support requirements. In a preferred embodiment of the present invention, a steel wire having a diameter of 2-6 mm is used.
本发明实施例的吊杆挂头50为了能够绕挂角19旋转，其下端面为圆弧面；为了能够与吊杆5连接，吊杆挂头50的下端为包覆吊杆5的连接筒501，连接筒501与吊杆挂头50一体成型或分体连接而成。In order to be able to rotate around the hanging angle 19, the lower end surface of the boom hanger 50 of the embodiment of the present invention has a circular arc surface; in order to be connectable with the boom 5, the lower end of the boom hanger 50 is a connecting cylinder for covering the boom 5 501. The connecting cylinder 501 is integrally formed with the boom hanger 50 or connected separately.
本发明实施例通过吊挂在外壳10上的弹性减震器来减震，即采用四根吊杆5将外桶14吊挂在外壳10的四个角上。吊杆5为钢丝，上部挂在吊杆挂头50上，吊杆挂头50可以转动。四根吊杆5通过缸筒2承受洗衣筒总成的全部重量，而洗衣筒总成的重量则将缸筒2内的减震弹簧压缩。工作时，由于桶内水的多少不同使减震弹簧的压 缩量也不同，桶体的高低位置也不同。当洗涤、脱水发生振动时，缸筒2一方面绕吊杆挂头50摆动，另一方面沿吊杆5上下滑动，这样可以吸收振动能量，减少由于洗衣筒总成的振动而引起的洗衣机振动，保持整机的平稳工作。The embodiment of the present invention is damped by an elastic damper suspended from the outer casing 10, that is, four outer hangers 14 are used to hang the outer tub 14 at the four corners of the outer casing 10. The boom 5 is a steel wire, and the upper portion is hung on the boom hanger 50, and the boom hanger 50 can be rotated. The four booms 5 receive the entire weight of the drum assembly through the cylinder 2, and the weight of the drum assembly compresses the damping springs in the cylinder 2. When working, the amount of compression of the damper spring is different due to the difference in the water in the barrel, and the height of the barrel is also different. When the washing and dehydration generate vibration, the cylinder 2 swings around the boom hanger 50 on the one hand, and slides up and down along the boom 5 on the other hand, so as to absorb vibration energy and reduce vibration of the washing machine caused by the vibration of the drum assembly. Keep the whole machine running smoothly.
实施例一Embodiment 1
下面参阅图4，其为本发明实施例一的减震器沿图3中A-A向的剖视结构示意图，在图4的实施例中，吊杆挂头50内部为贯通孔，吊杆5穿过该贯通孔，并在吊杆挂头50的上端连接固定。在本实施例中，吊杆5的上端通过折弯形成吊杆弯头51，吊杆弯头51与吊杆挂头50的上端面接触，通过焊接及其它能够固定的方式连接，用以增强吊杆5与吊杆挂头50的连接强度，防止吊杆5在受压缩或拉伸时，与吊杆挂头50脱离。FIG. 4 is a cross-sectional structural view of the shock absorber according to the AA direction of FIG. 3 according to the first embodiment of the present invention. In the embodiment of FIG. 4, the inside of the boom hanger 50 is a through hole, and the boom 5 is worn. The through hole is passed through and fixed to the upper end of the boom hanger 50. In the present embodiment, the upper end of the boom 5 is bent to form a boom elbow 51, and the boom elbow 51 is in contact with the upper end surface of the boom hitch 50, and is connected by welding and other fixed means for reinforcement. The strength of the connection between the boom 5 and the boom hanger 50 prevents the boom 5 from being disengaged from the boom hanger 50 when compressed or stretched.
继续参阅图4，在本实施例中，缸筒2的下端通过密封盖20封闭，上端开口，吊杆5穿过上端开口伸入缸筒2的内部，并在缸筒2内上下运动。吊杆5的下端与设置在缸筒2内的阻尼块3连接，阻尼块3与吊杆5固定在一起，并能够沿缸筒2上下运动，实现对吊杆5的缓冲。With continued reference to Fig. 4, in the present embodiment, the lower end of the cylinder barrel 2 is closed by a sealing cover 20, the upper end is open, and the boom 5 extends into the interior of the cylinder barrel 2 through the upper end opening and moves up and down within the cylinder barrel 2. The lower end of the boom 5 is connected to a damping block 3 provided in the cylinder 2, and the damping block 3 is fixed to the boom 5 and is movable up and down along the cylinder 2 to achieve buffering of the boom 5.
在本发明实施例中，为了增强吊杆5与阻尼块3的连接强度，在阻尼块3的内部设置有第一加强端37，第一加强端37的中间部开设有竖直的通孔，吊杆5穿过该通孔，并且，吊杆5的下端设置有吊杆帽52，吊杆帽52与第一加强端37接触，起到对阻尼块3定位及限位的作用；尤其，在阻尼块3向上运动时，吊杆帽52通过与第一加强端37的底面接触，实现对阻尼块3的限位。如图4所示，吊杆5的下端的吊杆帽52的外径大于通孔的内径，一方面实现吊杆5的定位，另一方面使阻尼块3无法从吊杆5上脱落。In the embodiment of the present invention, in order to enhance the connection strength between the boom 5 and the damping block 3, a first reinforcing end 37 is disposed inside the damping block 3, and a vertical through hole is opened in the middle portion of the first reinforcing end 37. The boom 5 passes through the through hole, and the lower end of the boom 5 is provided with a boom cap 52. The boom cap 52 is in contact with the first reinforcing end 37 to play the role of positioning and limiting the damping block 3; When the damper block 3 is moved upward, the boom cap 52 is brought into contact with the bottom surface of the first reinforcing end 37 to achieve the restriction of the damper block 3. As shown in FIG. 4, the outer diameter of the boom cap 52 at the lower end of the boom 5 is larger than the inner diameter of the through hole, on the one hand, the positioning of the boom 5 is achieved, and on the other hand, the damping block 3 cannot be detached from the boom 5.
另一方面，吊杆5与阻尼块3的连接处设置有第一密封圈36，第一加强端37内开设置有容纳上述第一密封圈36的第一密封圈安装槽。当然，该安装槽也可以开设在吊杆5的外壁上。在本发明的实施例中，阻尼块3与吊杆5之间还留有第三配合间隙35；通过在吊杆5与阻尼块3之间设置第一密封圈36、第三配合间隙35，可在两者之间形成一个动密封，使得吊杆5与阻尼块3之间可以相对滑动。替代性地，吊杆5与阻尼块3(具体是第一加强端37)可以设置成彼此固定 连接，从而当阻尼块3在缸筒2内上下滑动时，吊杆5与阻尼块3作为一个整体运动，这种结构更简单，制作成本更低。On the other hand, a first seal ring 36 is disposed at a joint of the boom 5 and the damper block 3, and a first seal ring mounting groove for accommodating the first seal ring 36 is disposed in the first reinforcement end 37. Of course, the mounting groove can also be opened on the outer wall of the boom 5. In the embodiment of the present invention, a third matching gap 35 is left between the damping block 3 and the boom 5; by providing a first sealing ring 36 and a third matching gap 35 between the boom 5 and the damping block 3, A dynamic seal can be formed between the two so that the boom 5 and the damping block 3 can slide relative to each other. Alternatively, the boom 5 and the damping block 3 (specifically the first reinforcing end 37) may be arranged to be fixedly connected to each other such that when the damping block 3 slides up and down within the cylinder 2, the boom 5 and the damping block 3 serve as one The overall movement, this structure is simpler and the production cost is lower.
此外，在本发明的实施例中，为了增强吊杆5与缸筒2的连接处的强度，缸筒2的内顶部设置有第二加强端26，第二加强端26与缸筒2的侧壁一体成型，第二加强端26上开设有竖直贯通的通孔，用以供吊杆5穿过；为了保证缸筒2的密封性能，在吊杆5与缸筒2的连接处设置第二密封圈25；第二加强端26内开设有容纳上述第二密封圈25的第二密封圈安装槽。与第一密封圈安装槽类似，该第二密封圈安装槽也可以开设在吊杆5的外壁上。Further, in the embodiment of the present invention, in order to enhance the strength of the joint of the boom 5 and the cylinder 2, the inner top of the cylinder 2 is provided with a second reinforcing end 26, the second reinforcing end 26 and the side of the cylinder 2 The wall is integrally formed, and the second reinforcing end 26 is provided with a vertically penetrating through hole for the hanger 5 to pass through; in order to ensure the sealing performance of the cylinder 2, the first portion of the connection between the boom 5 and the cylinder 2 is provided. The second sealing ring 25 is provided with a second sealing ring mounting groove for receiving the second sealing ring 25 therein. Similar to the first seal ring mounting groove, the second seal ring mounting groove can also be formed on the outer wall of the boom 5.
进一步，由于吊杆5在工作过程中会相对于缸筒2产生相对运动，吊杆5与缸筒2的连接处留有第二配合间隙27；方便吊杆5与缸筒2产生相对运动，进而改变缸筒2内腔室的压强。Further, since the boom 5 will move relative to the cylinder 2 during operation, a second matching gap 27 is left at the joint of the boom 5 and the cylinder 2; the relative movement of the boom 5 and the cylinder 2 is facilitated. Further, the pressure in the chamber inside the cylinder 2 is changed.
在本发明的实施例中，阻尼块3将缸筒2的内腔分隔成上部的第一腔室21和下部的第二腔室22，其中，第一腔室21内填充有液压油4。为了方便阻尼块3在缸筒2内的滑动，阻尼块3的外壁与缸筒2的内侧壁之间留有第一配合间隙33，；同时，阻尼块3与缸筒2之间还设置有第三密封圈32，在两者之间形成动密封。类似地，第三密封圈32既可以设置在阻尼块3的外壁上的槽中，也可以设置缸筒2的内壁上的槽中。In the embodiment of the invention, the damping block 3 divides the inner cavity of the cylinder 2 into an upper first chamber 21 and a lower second chamber 22, wherein the first chamber 21 is filled with hydraulic oil 4. In order to facilitate the sliding of the damping block 3 in the cylinder 2, a first matching gap 33 is left between the outer wall of the damping block 3 and the inner side wall of the cylinder 2; meanwhile, the damping block 3 and the cylinder 2 are also provided with The third seal ring 32 forms a dynamic seal between the two. Similarly, the third seal ring 32 may be disposed in a groove on the outer wall of the damper block 3 or in a groove on the inner wall of the cylinder tube 2.
在本发明的实施例中，液压油4可以为各种油液或油脂，粘稠性可以为各种级别。In the embodiment of the present invention, the hydraulic oil 4 may be various oils or greases, and the viscosity may be of various grades.
作为一个重大改进，在本发明的实施例中，阻尼块3的内部设置有第三腔室31，阻尼块3的上端开设有阻尼孔34，阻尼孔34将阻尼块3上方的第一腔室21和阻尼块3内部的第三腔室31连通，两个腔室之间的液压油4能够相互流动。这样，在受到外力作用时，阻尼液体可以从第一腔室21流入第三腔室31，或者从第三腔室31流入第一腔室21，从而产生流体阻尼，实现缓冲减震的效果。As a major improvement, in the embodiment of the present invention, the inside of the damping block 3 is provided with a third chamber 31, and the upper end of the damping block 3 is provided with a damping hole 34, and the damping hole 34 will be the first chamber above the damping block 3. 21 is in communication with the third chamber 31 inside the damping block 3, and the hydraulic oil 4 between the two chambers can flow to each other. Thus, when subjected to an external force, the damping liquid can flow from the first chamber 21 into the third chamber 31, or from the third chamber 31 into the first chamber 21, thereby generating fluid damping, achieving the effect of cushioning shock absorption.
本领域技术人员容易理解的是，由于第三腔室31的体积是固定的，当洗衣机产生较大的振动时，随着液压油4进入第三腔室3，第三腔室3中的压力迅速变大，从而产生更大的阻尼力和减震效果。相反，当洗衣机产生的振动较小时，进入第三腔室3的液压油4数量相对较少，第三腔室3中的流体压力较小，从而产生较小的阻尼力和减震效果。换句话说，本发明的减震器能够根据洗衣机的运行工况自动调整流 体阻尼，在大负载情况下尤其是在脱水由低速上高速的情况下，随着阻尼块在缸筒内的行程增大，阻尼力大，增强减震，保持洗衣机的稳定性；在小负载时，减震器处于低阻尼，尤其是在甩干高速时，随着阻尼块在缸筒内的行程减小，阻尼力减小，保持洗衣机的稳定性。It will be readily understood by those skilled in the art that since the volume of the third chamber 31 is fixed, when the washing machine generates a large vibration, as the hydraulic oil 4 enters the third chamber 3, the pressure in the third chamber 3 It becomes larger and larger, resulting in greater damping and shock absorption. On the contrary, when the vibration generated by the washing machine is small, the amount of the hydraulic oil 4 entering the third chamber 3 is relatively small, and the fluid pressure in the third chamber 3 is small, thereby generating a small damping force and a shock absorbing effect. In other words, the damper of the present invention can automatically adjust the fluid damping according to the operating condition of the washing machine, and in the case of a large load, especially when the dehydration is high at a low speed, the stroke of the damper block in the cylinder increases. Large, large damping force, enhanced shock absorption, maintaining the stability of the washing machine; at low load, the shock absorber is at low damping, especially at the high speed of the drying, as the stroke of the damping block in the cylinder is reduced, damping The force is reduced to maintain the stability of the washing machine.
在本发明实施例中，在第一腔室21内还设置有减震弹簧23，减震弹簧23的上端与缸筒2的内侧壁连接，下端与阻尼块3的上部连接。在阻尼块3上下运动时，第一腔室21的体积变化，减震弹簧23压缩或者伸长；实现缓冲减震。本实施例的弹簧由弹性材料制成，如钢丝或者钢筋。In the embodiment of the present invention, a damper spring 23 is further disposed in the first chamber 21, the upper end of the damper spring 23 is connected to the inner side wall of the cylinder barrel 2, and the lower end is connected to the upper portion of the damper block 3. When the damping block 3 moves up and down, the volume of the first chamber 21 changes, and the damping spring 23 compresses or elongates; damping damping is achieved. The spring of this embodiment is made of an elastic material such as steel wire or steel bar.
实施例二 Embodiment 2
下面参阅图5-6，图5为本发明实施例二的减震器沿图3中A-A向的剖视结构示意图；图6为本发明实施例二的具有密封圈的减震器沿图3中A-A向的剖视结构示意图。5-6, FIG. 5 is a cross-sectional structural view of the damper according to Embodiment 2 of the present invention taken along line AA of FIG. 3; FIG. 6 is a damper with a sealing ring according to Embodiment 2 of the present invention. A schematic cross-sectional view of the AA direction.
实施例二与上述实施例一的不同之处在于，阻尼块3的外壁圆周上开设了静压孔38，优选地，静压孔38的直径小于阻尼孔34的直径；进入阻尼块3的内部的具有压力的液体会沿着阻尼块外壁上的静压孔38流出，充斥在阻尼块3与缸筒2之间的间隙33中，实现阻尼块3的外壁与缸筒2的内壁形成静压轴承的效果，从而使阻尼块3与缸筒2之间的摩擦在整个圆周上更均匀。更具体地，在实际使用时，吊杆5通常为倾斜设置，不可避免地使阻尼块3在圆周方向上承受不同大小的力，造成阻尼块3的偏磨乃至失效；但是，本发明通过设置静压孔38实现了静压轴承的效果，有效避免了该问题的发生。The second embodiment is different from the first embodiment described above in that the outer wall of the damping block 3 has a static pressure hole 38 formed therein. Preferably, the diameter of the static pressure hole 38 is smaller than the diameter of the damping hole 34; and the inside of the damping block 3 is entered. The pressurized liquid flows out along the static pressure hole 38 on the outer wall of the damping block, and is filled in the gap 33 between the damping block 3 and the cylinder 2, so that the outer wall of the damping block 3 and the inner wall of the cylinder 2 form a static pressure. The effect of the bearing is such that the friction between the damping mass 3 and the cylinder 2 is more uniform over the entire circumference. More specifically, in actual use, the boom 5 is generally inclined, inevitably causing the damping block 3 to withstand different magnitudes of force in the circumferential direction, causing partial wear or even failure of the damping block 3; however, the present invention is provided by The static pressure hole 38 achieves the effect of the hydrostatic bearing, effectively avoiding the occurrence of this problem.
在本发明的实施例中，静压孔38的数量和直径大小可根据实际应用场合的需要任意选取，但总体上静压孔38的直径应该小于阻尼孔34的直径。In the embodiment of the present invention, the number and diameter of the static pressure holes 38 can be arbitrarily selected according to the needs of practical applications, but the diameter of the static pressure holes 38 should be smaller than the diameter of the damping holes 34 as a whole.
在图5的实施例中，阻尼块3的外壁与缸筒2的内壁之间未设置第一密封圈，但仍然能够实现上述功能，只是第三腔室31中的液压油4会有些许渗漏到第二腔室22中。因此，图6中设置有密封圈32的实施例是更优选的，其既可以保证实现静压轴承效果，同时可以避免液压油向第二腔室22中渗漏。In the embodiment of Fig. 5, the first sealing ring is not disposed between the outer wall of the damping block 3 and the inner wall of the cylinder 2, but the above functions can still be achieved, except that the hydraulic oil 4 in the third chamber 31 is somewhat permeable. Leaks into the second chamber 22. Therefore, an embodiment in which the seal ring 32 is provided in Fig. 6 is more preferable, which can ensure the effect of the hydrostatic bearing as well as the leakage of the hydraulic oil into the second chamber 22.
下面参阅图7-9，图7为本发明实施例二的减震器弹簧预压状态的剖视结构示意图；图8为本发明实施例二的减震器弹簧压缩状态的剖视结构示意图；图9为本发明实施例二的减震器弹簧伸长状态的剖视结构示意图。现根据上述图7-9所示，按照弹簧压缩顺序描述本实施例二的工作过程，实施例一的工作过程与实施例二相同，此处不再赘述。7 is a cross-sectional structural view showing a spring state of a damper spring according to a second embodiment of the present invention; FIG. 8 is a cross-sectional structural view showing a compressed state of a damper spring according to a second embodiment of the present invention; Fig. 9 is a cross-sectional structural view showing the state in which the damper spring is extended in the second embodiment of the present invention. The working process of the second embodiment is described in the following steps. The working process of the first embodiment is the same as that of the second embodiment, and details are not described herein again.
如图7所示，当洗衣机中放入衣物和/或进水后，弹簧23处于预压状态，开始工作后，减震弹簧23进一步压缩，阻尼块3向上运动，第一腔室21体积减小，第二腔室22体积增大；部分液压油4通过阻尼孔34进入第三腔室31，并通过静压孔38充斥到阻尼块3外壁与缸筒2的内侧壁之间的第一配合间隙33中。As shown in FIG. 7, when the laundry and/or water is put into the washing machine, the spring 23 is in a pre-pressing state. After starting the operation, the damper spring 23 is further compressed, the damper block 3 is moved upward, and the volume of the first chamber 21 is reduced. Small, the second chamber 22 is increased in volume; part of the hydraulic oil 4 enters the third chamber 31 through the orifice 34, and is filled by the static pressure hole 38 to the first between the outer wall of the damping block 3 and the inner side wall of the cylinder 2. Fit the gap 33.
在本发明的实施例中，洗衣机完成洗涤负载添加和进水之后，阻尼块3继续上移的最大设计安全距离为Hmax。阻尼块3整个洗涤脱水周期中最大上移距离为H，最大下移行程为H；优选地H≤Hmax。In the embodiment of the present invention, after the washing machine completes the washing load addition and the water inflow, the maximum design safety distance at which the damping block 3 continues to move up is Hmax. The maximum upward movement distance of the damping block 3 during the entire washing and dehydrating cycle is H, and the maximum downward movement is H; preferably H≤Hmax.
接着参阅图8，图8所示状态为洗衣机的外筒下沉至最大幅值，弹簧23处于最大形变压缩，阻尼块3沿图示中的A方向处于最大位移的状态，此时吊杆5从缸筒2中伸出的行程为H，整个减震器伸长H，整个外筒下移了H。当吊杆5牵引阻尼块3沿着A方向运动时，在吊杆5的拉伸作用下，缸筒2的第一腔室21的体积变至最小；液压油4将沿着-A方向运动，经由阻尼块3上的阻尼孔34流至阻尼块3内部的第三腔室31中，从而对阻尼块3产生阻尼力；有效减缓阻尼块3的运动速度与幅值，与减震弹簧23共同达到缓冲减震的目的。Referring to FIG. 8, the state shown in FIG. 8 is that the outer cylinder of the washing machine sinks to the maximum amplitude, the spring 23 is at the maximum deformation compression, and the damping block 3 is in the maximum displacement state along the A direction in the figure, and the boom 5 is at this time. The stroke extending from the cylinder 2 is H, the entire damper is extended by H, and the entire outer cylinder is moved down by H. When the boom 5 pulls the damping block 3 to move in the A direction, the volume of the first chamber 21 of the cylinder 2 is minimized under the stretching action of the boom 5; the hydraulic oil 4 will move in the -A direction. Passing through the damping hole 34 on the damping block 3 to the third chamber 31 inside the damping block 3, thereby generating a damping force on the damping block 3; effectively slowing the moving speed and amplitude of the damping block 3, and the damping spring 23 Together to achieve the purpose of buffer damping.
最后参阅图9，图9所示状态为缸筒2上移至最大幅值，弹簧23恢复最大长度，阻尼块3沿图示B方向处于最大位移的状态；此时吊杆5向缸筒2中伸入行程H，整个减震器缩短H，整个外筒上移了H。当吊杆5牵引阻尼块3沿着B方向运动时，在吊杆5的作用下，缸筒2内的第一腔室21的体积变至最大，液压油4将沿着-B方向运动，经由阻尼块3上的阻尼孔34从阻尼块3内部的第三腔室31流至缸筒2内的第一腔室21，对阻尼块3产生阻尼力，有效减缓阻尼块3的运动速度与幅值，与减震弹簧23共同达到缓冲减震的目的。Finally, referring to FIG. 9, the state shown in FIG. 9 is that the cylinder 2 is moved up to the maximum amplitude, the spring 23 is restored to the maximum length, and the damping block 3 is in the state of maximum displacement in the direction of the figure B; at this time, the boom 5 is toward the cylinder 2 When the stroke reaches H, the entire shock absorber is shortened by H, and the entire outer cylinder is moved up by H. When the boom 5 pulls the damping block 3 to move in the B direction, under the action of the boom 5, the volume of the first chamber 21 in the cylinder 2 becomes maximum, and the hydraulic oil 4 will move in the -B direction. Flowing from the third chamber 31 inside the damping block 3 to the first chamber 21 in the cylinder barrel 2 through the damping hole 34 on the damping block 3, a damping force is generated on the damping block 3, effectively slowing down the moving speed of the damping block 3 The amplitude, together with the damper spring 23, achieves the purpose of cushioning shock absorption.
至此，已经结合附图所示的优选实施方式描述了本发明的技术方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下，本领域技术人员可以对相关技术特征作出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。Heretofore, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings, but it is obvious to those skilled in the art that the scope of the present invention is obviously not limited to the specific embodiments. Those skilled in the art can make equivalent changes or substitutions to the related technical features without departing from the principles of the present invention, and the technical solutions after the modifications or replacements fall within the scope of the present invention.

Claims (10)

  1. 一种减震器，其特征在于包括：A shock absorber characterized by comprising:
    缸筒，其具有内腔；a cylinder having an inner cavity;
    阻尼块，其以可滑动方式设置在所述内腔中，将所述内腔分隔成第一腔室和第二腔室；a damping block slidably disposed in the inner cavity to divide the inner cavity into a first chamber and a second chamber;
    所述阻尼块的内部设置有第三腔室，并且所述阻尼块上开设有阻尼孔，所述第一腔室和/或所述第三腔室中填充有流体，当所述阻尼块相对于所述缸筒滑动时，所述流体通过所述阻尼孔在所述第一腔室和第三腔室之间流动。The inside of the damping block is provided with a third chamber, and the damping block is provided with a damping hole, and the first chamber and/or the third chamber are filled with fluid when the damping block is opposite The fluid flows between the first chamber and the third chamber through the orifice when the cylinder slides.
  2. 根据权利要求1所述的减震器，其特征在于，所述减震器还包括吊杆，所述吊杆的下端与所述阻尼块连接，所述吊杆的主体部分穿过所述缸筒，并且所述吊杆的主体部分与所述缸筒之间设置有第一密封圈。The damper according to claim 1, wherein the damper further comprises a boom, a lower end of the boom is coupled to the damper block, and a body portion of the boom passes through the cylinder a barrel, and a first sealing ring is disposed between the main body portion of the boom and the cylinder barrel.
  3. 根据权利要求2所述的减震器，其特征在于，所述吊杆的下端与所述阻尼块之间设置有第二密封圈。The damper according to claim 2, wherein a second seal ring is disposed between the lower end of the boom and the damper block.
  4. 根据权利要求3所述的减震器，其特征在于，所述阻尼块的外壁与所述缸筒的内壁之间还设置有第三密封圈。The damper according to claim 3, wherein a third seal ring is further disposed between the outer wall of the damper block and the inner wall of the cylinder.
  5. 根据权利要求1至4中任一项所述的减震器，其特征在于，所述阻尼块的外壁上开设有静压孔，流入所述第三腔室的流体能够通过所述静压孔进入所述阻尼块的外壁与所述缸筒的内壁之间的间隙。The damper according to any one of claims 1 to 4, wherein a static pressure hole is formed in an outer wall of the damper block, and fluid flowing into the third chamber can pass through the static pressure hole Entering a gap between the outer wall of the damping block and the inner wall of the cylinder.
  6. 根据权利要求5所述的减震器，其特征在于，所述静压孔的直径小于所述阻尼孔的直径。The damper according to claim 5, wherein the diameter of the static pressure hole is smaller than the diameter of the orifice.
  7. 根据权利要求3所述的减震器，其特征在于，所述阻尼块的内部设置有第一加强端，所述第一加强端上开设有第一通孔，所述吊杆穿过所述第一通孔并借助所述第二密封圈与所述阻尼块密封连接。The damper according to claim 3, wherein the inside of the damper block is provided with a first reinforcing end, the first reinforcing end is provided with a first through hole, and the boom passes through the The first through hole is sealingly connected to the damping block by means of the second sealing ring.
  8. 根据权利要求3或7所述的减震器，其特征在于，所述缸筒的内部设置有第二加强端，所述第二加强端上开设有第二通孔，所述吊杆的主体部分穿过所述第二通孔并借助所述第一密封圈与所述缸筒密封连接。The damper according to claim 3 or 7, wherein the inside of the cylinder is provided with a second reinforcing end, and the second reinforcing end is provided with a second through hole, the main body of the boom Partially passing through the second through hole and sealingly connected to the cylinder by means of the first sealing ring.
  9. 根据权利要求1所述的减震器，其特征在于，所述减震器还包括设置在所述第一腔室内的减震弹簧，所述减震弹簧的上端抵靠所述缸筒的内顶部，所述减震弹簧的下端抵靠所述阻尼块。The damper according to claim 1, wherein the damper further comprises a damper spring disposed in the first chamber, the upper end of the damper spring abutting the inside of the cylinder At the top, the lower end of the damping spring abuts against the damping block.
  10. 一种洗衣机，包括壳体和设置于壳体中的洗衣筒总成，其特征在于，所述洗衣机还包括多个减震器，所述洗衣筒总成通过所述多个减震器悬挂在所述壳体上，所述减震器中的至少一个为根据权利要求1-9中任一项所述的减震器。A washing machine comprising a housing and a washing tub assembly disposed in the housing, wherein the washing machine further comprises a plurality of shock absorbers, the washing tub assembly being suspended by the plurality of shock absorbers At least one of the shock absorbers on the housing is a shock absorber according to any one of claims 1-9.
PCT/CN2018/078358 2017-03-27 2018-03-07 Vibration damper and laundry machine comprising same WO2018177102A1 (en)

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