WO2018121720A1

WO2018121720A1 - Damper, and laundry machine using same

Info

Publication number: WO2018121720A1
Application number: PCT/CN2017/119736
Authority: WO
Inventors: 吕佩师; 王得军; 纪虎; 张开宏; 刘尊安; 宋秀顺
Original assignee: 青岛海尔洗衣机有限公司
Priority date: 2016-12-30
Filing date: 2017-12-29
Publication date: 2018-07-05

Abstract

A damper, and laundry machine using same. The damper comprises a rotating shaft (3), a cam mechanism (4), a buffer mechanism (5), and a stroke amplification mechanism (6). The rotating shaft (3) rotates about an axial direction. The buffer mechanism (5) provides a buffering force. The cam mechanism (4) is connected to the rotating shaft (3), and converts rotation with respect to the rotating shaft (3) into a linear reciprocating motion. The stroke amplification mechanism (6) is connected to the cam mechanism (4) and the buffer mechanism (5), and transmits and amplifies a small stroke of the cam mechanism (4) to provide a large stroke of the buffer mechanism (5). The stroke amplification mechanism (6) comprises a lever (61), and a fulcrum (613) divides the lever into a short arm (612) and a long arm (611). An end of the lever on the long arm (611) is connected to the buffer mechanism (5), and the end of the lever on the short arm (612) is connected to the cam mechanism (4). By employing the stroke amplification mechanism (6) to convert a small movement of the rotating shaft (3) into a large movement of the buffer mechanism (5), the present invention provides a design in which a small-angled rotation of the rotating shaft (3) can accurately provide a sufficient damping force, thus improving product safety, and providing superior user experience.

Description

Damper and washing machine thereof

Technical field

The invention relates to a hinge structure, in particular to a hinge structure of a washing machine, in particular to a damper of a washing machine.

Background technique

The traditional washing machine, the cover plate and the upper frame of the casing pass the ordinary hinge, so the opening and closing of the cover plate does not have a buffering force, especially in the process of closing the cover plate, if the hand is released midway, the cover plate acts with gravity and inertia force. It quickly closes down and collides with the upper frame, causing noise and even causing damage. To this end, many existing patents have proposed solutions to the above problems.

A cover structure of a washing machine and a manufacturing method thereof are disclosed in Chinese Patent Application No. CN1884672, the cover structure of the washing machine includes: a cover body; a cushioning member surrounding the peripheral portion of the cover body; surrounding the periphery of the cushioning member The cover of the department. A method of manufacturing a cover for a washing machine according to the present invention includes the following steps: a step of adhering the cushioning member to the periphery of the cover main body; a stage of placing the cover main body in which the cushioning member is in close contact with the inside of the mold; and a resin compound flowing into the mold The internal stage; the stage in which the above resin compound is solidified; the stage in which the above mold is separated. It is said that the cover structure of the washing machine and the method of manufacturing the same according to the invention as described above have an effect that the stress generated when the cover is in close contact with the cover can be absorbed by the cushioning member. However, the structure is complicated, the buffer stroke is short, the silencing and anti-collision effects are not good, and it is not easy to manufacture.

A Chinese patent of the application No. CN 200910118742.3 discloses a cover structure of a washing machine, and a toggle spring in which an applied force is switched in an opening direction or a closing direction at a predetermined angle in the opening and closing rotation operation of the cover; a cover spring that urges the cover toward the opening direction; and a rotary damper that attenuates the rotation of the cover. The damper damper is disposed inside the damper holder in a rotationally and slidable manner, the damper holder being fixed to the cover, the damper shaft of the damper damper being held in a non-rotatable manner In the top cover, a damping force is applied to the rotation of the cover when the cover is opened and closed, so that no impact occurs during opening and closing.

In the above technical solution, a buffer device composed of a buffer spring is disposed between the cover plate and the control disc seat, so that the cover plate avoids an impact when it is closed. However, due to the uncertainty of the damping force of the spring itself, the reliability of the buffer device cannot be effectively improved.

Although the existing washing machine or other upper cover has made some improvements and added dampers, the damper generally uses a damping oil damper. Due to the inherent problem of the principle, it takes a certain time for the damping oil to flow. If the user quickly opens the top cover during the use of the upper cover and then releases the hand, the damping does not work, which leads to a series of safety problems.

In view of this, the present invention has been specifically proposed.

Summary of the invention

It is an object of the present invention to provide a damper that is accurate in design, simple in structure, and capable of obtaining a damping force when rotating at a small angle.

Another object of the present invention is to provide a washing machine that can obtain a damping force by opening a small angle.

In order to achieve the purpose of the invention, the following technical solutions are adopted:

A damper includes: a rotating shaft, a cam mechanism, a buffer mechanism, and a stroke amplifying mechanism,

Rotating shaft, rotating around the axis;

a cushioning mechanism that provides a cushioning force;

a cam mechanism connected to the rotating shaft to convert the relative rotation of the rotating shaft into a linear reciprocating motion;

The stroke amplifying mechanism is respectively connected to the cam mechanism and the buffer mechanism, and the small stroke motion transmission of the cam mechanism is enlarged to a large stroke motion of the buffer mechanism.

Further, the stroke amplifying mechanism comprises a lever, and the lever support point divides the lever into a short arm and a long arm, and one end of the long arm of the lever is connected with the buffer mechanism, and one end of the short arm of the lever is connected with the cam mechanism;

Preferably, the stroke amplifying mechanism further comprises a moving rod, one end of the moving rod is connected with one end of the lever short arm, and the other end of the moving rod is connected with the cam mechanism.

The length of the short arm of the lever is smaller than the length of the long arm, and the ratio of the length of the short arm to the length of the long arm is 1:2-1:6, and preferentially, it is 1:4. That is, the ratio of the length of the short arm of the lever to the length of the long arm is a small stroke ratio of the cam mechanism and a large stroke ratio of the buffer mechanism. The ratio of the length of the short arm to the length of the long arm is related to the magnitude of the rotational force of the rotating shaft.

A further solution is: the buffer mechanism provides a buffering force to the axial direction of the rotating shaft;

The cam mechanism converts the buffering force in the axial direction provided by the buffer mechanism into the damping force in the rotating direction of the rotating shaft.

Further, the cam mechanism includes a first cam and a second cam, the first cam is connected to one end of the rotating shaft, rotates integrally with the rotating shaft, and the second cam is connected with the stroke amplifying mechanism, and the first cam and the second cam are end faces. The cam rotates relative to each other, and the end portions of the first cam and the second cam are in contact with each other, and preferably, the first cam and the rotating shaft are integrated.

Further, the stroke amplifying mechanism comprises a lever, and the lever support point divides the lever into a short arm and a long arm, and one end of the lever long arm is connected with the buffer mechanism, and one end of the short arm of the lever is connected with the second cam;

Preferably, the stroke amplifying mechanism further comprises a moving rod, one end of the moving rod is connected with one end of the lever short arm, and the other end of the moving rod is connected with the second cam, and reciprocates in the axial direction together with the second cam, and then preferably moves The rod and the second cam are integrated.

Further, the moving rod is sleeved with a return spring, or the moving rod and the rotating arm of the lever short arm are provided with a torsion spring structure to increase the buffering force of the second cam to the first cam axial direction.

Alternatively, a further alternative is: the buffer mechanism providing a buffering force perpendicular to the axial direction of the rotating shaft;

The cam mechanism converts the buffering force provided by the buffer mechanism perpendicular to the axial direction into a damping force in the rotating direction of the rotating shaft.

Further, the cam mechanism includes a third cam connected to one end of the rotating shaft and integrally rotated with the rotating shaft. The third cam rotates on a circumferential surface having a curved contour, and the stroke amplifying mechanism is coupled to the third cam rotating circumferential surface.

Further, the stroke amplifying mechanism comprises a lever, and the lever support point divides the lever into a short arm and a long arm, and one end of the long arm of the lever is connected with the buffer mechanism, and one end of the short arm of the lever is connected with the rotating peripheral surface of the third cam;

Preferably, the stroke amplifying mechanism further comprises a moving rod, one end of the moving rod is connected with one end of the rotating arm of the lever short arm, and the other end of the moving rod is connected with the rotating surface of the third cam.

Further, the buffer mechanism is a pneumatic/hydraulic buffer mechanism, including a pressure cylinder and a piston rod. One end of the piston rod is connected with one end of the long arm of the lever, and the other end is disposed in the pressure cylinder. The pressure cylinder is opposite to the piston rod. One end can be rotated.

Further, the damper further comprises a box body, the side wall of the box body is provided with a through hole, one end of the rotating shaft protrudes from the through hole, and the other end extends in the box body, and the cam mechanism, the buffer mechanism and the stroke amplifying mechanism are movably mounted on the box In the body, the rotating shaft rotates relative to the casing.

A washing machine of the present invention comprises a disc holder, an upper cover connected to the disc holder, and the above-mentioned damper between the upper cover and the disc holder.

Further, the damper is mounted on the upper cover, and the socket is provided with a hinge mounting seat, and the rotating shaft is inserted into the hinge mounting seat and fixed relative to the hinge mounting seat.

After adopting the above technical solution, the present invention has the following advantageous effects compared with the prior art.

The invention converts the action of the rotating shaft about the axis of rotation into a linear direction by the cam mechanism, and converts the small action of the cam mechanism into a large action of the buffer mechanism by the stroke amplifying mechanism, so that the rotation of the rotating shaft can be accurately performed at a small angle. Get a design with sufficient damping force to improve product safety and enhance the user experience.

The washing machine of the invention converts the action of the rotation direction of the upper cover of the washing machine into a linear direction by the cam mechanism at the end of the rotating shaft, and then converts the smaller action into a larger action of the piston rod by using the lever arm, and utilizes precise precision between the components. The matching design enables the washing machine to open the cover at a small angle to obtain the damping force immediately, thereby improving product safety and improving the user experience.

When the upper cover is opened at a small angle, the rotating shaft drives the first cam to rotate relative to the second cam, and the second cam obtains an axial linear reciprocating motion, and the small stroke of the movement is converted into a larger action of the piston rod by the stroke amplifying mechanism. The upper cover obtains a large damping force, and the invention has precise design and simple structure.

The invention integrates the rotating shaft, the cam mechanism, the buffering mechanism and the stroke amplifying mechanism on the box body, has a modular structure, is small in size, and is convenient to install, and is suitable for popularization and use.

DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are intended to be illustrative of the invention. It is apparent that the drawings in the following description are only some embodiments, and other drawings may be obtained from those skilled in the art without departing from the drawings. In the drawing:

Figure 1 is a structural view of a damper of the present invention;

Figure 2 is a schematic view showing the damper mounting structure of the present invention;

Figure 3 is a schematic view showing the positioning of the rotating shaft of the present invention;

Figure 4 is a schematic view showing the structure of a moving rod of the present invention;

Figure 5 is a schematic view showing the structure of the washing machine of the present invention.

Main component description:

1—top cover, 2—disk holder, 3—rotary shaft, 4-cam mechanism, 5-buffer mechanism, 6—stroke amplification mechanism, 7—box, 31—limit, 41—first cam, 42— Second cam, 43-joint, 44-cam, 51-piston rod, 52-cylinder, 53-pin fixed end, 61-lever, 611-long arm, 612-short arm, 613-support point, 62—moving rod, 71—blocking structure, 8-return spring.

It is to be understood that the drawings and the written description are not intended to limit the scope of the present invention in any way.

detailed description

The embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. The orientation or positional relationship of the indications is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the invention and the simplified description, rather than indicating or implying that the device or component referred to has a specific orientation, in a specific orientation. The construction and operation are therefore not to be construed as limiting the invention.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

As shown in FIG. 1 to FIG. 5, the damper of the present invention comprises: a rotating shaft 3, a cam mechanism 4, a buffer mechanism 5 and a stroke amplifying mechanism 6, wherein the rotating shaft 3 rotates in the axial direction; the buffer mechanism 5 Providing a buffering force; the cam mechanism 4 is coupled to the rotating shaft 3, and converts the relative rotation of the rotating shaft 3 into a linear reciprocating motion; the stroke amplifying mechanism 6 is coupled to the cam mechanism 4 and the buffer mechanism 5, respectively, to cam The small stroke motion transmission of the mechanism 4 is amplified to the large stroke motion of the buffer mechanism 5.

The stroke amplifying mechanism 6 of the present invention comprises a lever 61. The lever support point 613 divides the lever 61 into a long arm 611 and a short arm 612. One end of the lever long arm 611 is connected to the buffer mechanism 5, and one end of the lever short arm 612 and the cam mechanism 4 connection. The length of the short arm 612 is smaller than the length of the long arm 611, and the ratio of the length of the short arm 612 to the length of the long arm 612 is 1:2-1:6, and preferentially, 1:4. That is, the ratio of the length of the short arm of the lever to the length of the long arm is a small stroke ratio of the cam mechanism and a large stroke ratio of the buffer mechanism. The ratio of the length of the short arm to the length of the long arm is not a limit value, and the design is related to the magnitude of the rotational force of the rotating shaft.

Preferably, the stroke amplifying mechanism 6 further includes a moving rod 62. One end of the moving rod 62 is coupled to one end of the lever short arm 612, and the other end of the moving rod 62 is coupled to the cam mechanism 4.

The damper of the present invention further comprises a box body 7. The side wall of the box body 7 is provided with a perforation or an opening (not shown), and one end of the rotating shaft 3 protrudes from the perforation or the opening, which is a pin structure, and One end is extended in the box body 7. The end portion of the box body 7 is provided with a limiting member 31. The corresponding limiting member in the box body 7 is provided with a blocking structure 71 (refer to FIG. 3) to prevent the rotating shaft 3 from being in the shaft. Moves up. The cam mechanism 4, the buffer mechanism 5, and the stroke amplifying mechanism 6 are both movably disposed in the casing 7, and the rotating shaft 3 is rotated relative to the casing 7.

Embodiment 1

As shown in FIG. 1 and FIG. 2, the cam mechanism 4 of the present embodiment includes a first cam 41 and a second cam 42. The first cam 41 is coupled to one end of the rotating shaft 3 and rotates together with the rotating shaft 3. Preferably, The first cam is integrally connected with the rotating shaft, the second cam 42 is connected to the stroke amplifying mechanism 6, and the first cam 41 and the second cam 42 are end face cams, and the two are relatively rotated, and the first cam 41 and the second cam 42 are in contact with each other. The ends have intersecting curved contours.

Specifically, the first cam 41 includes a cam portion 44 and a connecting portion 43 which are integrally rotated, preferably in an integral structure, and may be pinned. The connecting portion 43 is pinned to one end of the rotating shaft 3, and preferably, the connecting portion 43 is In the non-cylindrical structure, the rotating shaft 3 is provided with a matching slot so that the first cam 41 rotates together with the rotating shaft 3. More preferably, the connecting portion 43 is integrally formed with the rotating shaft, and the second cam 42 is coupled to the moving rod 62, and the two are relatively fixed in the rotational direction to prevent the second cam 42 from rotating. Since one end of the moving rod 62 is connected with one end of the lever short arm 612, the moving rod 62 cannot be pivoted. Therefore, it is preferable to design the second cam 42 and the moving rod 62 as an integral structure, or to adopt, for example, the first cam 41 and the rotation. The shaft 3 has the same connection structure so that the second cam 42 is fixed in the rotational direction. When the first cam 41 rotates together with the rotary shaft 3, it is affected by the adjacent end faces of the first cam 41 and the second cam 42, and the second cam 42 The linear motion effect in the axial direction is generated, thereby driving the moving rod 62 to move linearly, and the moving rod 62 drives the lever short arm 612 to swing around the support point 613, so that the lever long arm 611 also swings around the support point 613, so that the buffer mechanism 5 generates the buffer. The force.

Since the cam mechanism 4 converts the relative rotation angle of the rotating shaft 3 into the linear motion of the moving rod 62, the linear movement of the moving rod 62 is small, and therefore, when the moving rod 62 and the lever short arm 612 rotate, the moving rod is not caused. 62 is off the axis at a large angle. Preferably, in order to prevent the second cam 42 from deviating from the axial direction, a guiding mechanism may be provided. Further, the rotating pair between the moving rod 62 and the lever short arm 612 is set to a certain amount of motion, so that when the lever short arm 612 swings around the supporting point 613, the moving rod 62 is not caused to deviate from the axis. After the lever is actuated, the one end of the lever long arm 611 and the buffer mechanism 5 swings a large amplitude, the buffer mechanism 5 as a whole is affected by the swing of the lever long arm 611, and the movement of the swinging path of the end of the buffer mechanism 5 and the long arm 611 of the lever is changed. Therefore, a rotating mechanism is provided at the other end of the buffer mechanism 5 so that the entire cushioning mechanism 5 is rotatable around the end.

Alternatively, the stroke amplifying mechanism 6 of the present invention has the lever short arm 612 directly connected to the second cam 42 to reduce the arrangement of the moving rod, and the second cam 42 is fixed in the rotational direction.

The buffer mechanism 5 of the present invention provides a buffering force to the axial direction of the rotating shaft 3 by the stroke amplifying mechanism 6; the cam mechanism 4 converts the buffering force of the axial direction provided by the buffer mechanism 5 into the rotating direction of the rotating shaft 3 Damping force.

Embodiment 2

This embodiment is not shown in the drawings, and those skilled in the art can understand the technical solution by the following description. The buffer mechanism according to the embodiment provides a buffering force perpendicular to the axial direction of the rotating shaft; and the cam mechanism converts the buffering force provided by the buffer mechanism perpendicular to the axial direction into the damping force of the rotating shaft.

The cam mechanism includes a third cam coupled to one end of the rotating shaft and integrally rotating with the rotating shaft. The third cam rotates on a circumferential surface having a curved contour, and the lever short arm or the moving rod is coupled to the third cam rotating circumferential surface.

Embodiment 3

As shown in FIG. 1 and FIG. 2, the buffer mechanism 5 of the present invention is a pneumatic/hydraulic buffer mechanism, including a pressure cylinder 52 and a piston rod 51. One end of the piston rod 51 is connected with one end of the lever long arm 611, and the activity is set. The other end of the casing 7 is disposed in the cylinder 52. The cylinder 52 is rotatably disposed in the casing 7. The end of the cylinder 52 opposite to the piston rod 51 is designed as a pin fixing end 53 and a pin of the casing 7. Axis connection.

Embodiment 4

As shown in FIG. 4, in order to increase the buffering force of the buffer mechanism 5 in the axial direction of the second cam 42, the damping force of the first cam 41 to rotate the rotating shaft 3 is increased, and the moving rod 62 is sleeved with a reset. The spring 8, or the moving rod 62 and the rotating arm of the lever short arm 612 are provided with a torsion spring structure (not shown) to increase the buffering force of the second cam to the first cam axial direction and increase the damping reaction speed. .

Embodiment 5

As shown in FIGS. 1 and 2, the rotary shaft 3, the cam mechanism 4, the stroke amplifying mechanism 6, and the buffer mechanism 5 according to the present invention are sequentially connected and provided in the casing 7. The casing includes a bottom and a first side wall, a second side wall, a third side wall and a fourth side wall, and the rotating shaft 3 and the cam mechanism 4 are adjacent to the first side wall of the casing 7 along the side wall. The extension direction is set, one end of the rotating shaft 3 is pierced from a second side wall adjacent to the first side wall, the perforation is disposed near the connection with the first side wall, and the moving rod 62 and the second cam 42 of the cam mechanism 4 are disposed. Along the first side wall extending direction of the casing 7, the moving rod 62 extends toward the third side wall connected to the first side wall, and one end of the third side wall direction is movably connected with the pin short arm 612 pin. The connecting pin shaft is disposed in the casing. The lever short arm 612 and the lever long arm 611 extend toward the fourth side wall along the third side wall direction. The lever short arm 612 and the support point 613 of the lever long arm 611 are fixed in the casing, and the lever long arm 611 is connected to the piston rod 51. One end of the connection between the third side wall and the fourth side wall, the lever long arm 611 and the piston rod 51 are movably connected, and the connecting pin shaft is also movably disposed in the casing. The piston rod 51 and the pressure cylinder 52 are sequentially extended to the second side wall direction, and the end of the pressure cylinder 52 is fixed in the casing 7 by a pin shaft, and is close to a position where the rotating shaft 3 passes through the second side wall.

The rotating shaft, the cam mechanism, the stroke amplifying mechanism and the buffering mechanism according to the embodiment are sequentially connected to form an unclosed triangle, the rotating shaft passes through the fixed position, the end of the pressure cylinder is fixed, and the lever is short by the unclosed characteristic. The connection position between the arm and the moving rod and the connection position of the long arm of the lever and the piston rod have a certain range of motion. The above-mentioned design structure is exquisite, the volume of the damper is reduced, the occupied space is small, the structure is simple, and the space inside the box is fully utilized. With a suitable cushioning mechanism, sufficient damping effect is obtained.

Embodiment 6

As shown in Fig. 5, the washing machine of the present invention comprises a disc holder 2, an upper cover 1 connected to the disc holder 2, and a damper as described in the above embodiment between the upper cover 1 and the disc holder 2. In this embodiment, the damper is mounted on the upper cover 1, and the rotating shaft 3 of the damper is plugged and connected with the hinge mounting seat on the disk base 2, and the rotating shaft 3 is relatively fixed to the hinge mounting seat.

Alternatively, the damper is mounted on the disk holder 2, and the rotating shaft 3 of the damper is inserted and connected to the upper cover 1, and the rotating shaft 3 is fixed to the upper cover 1.

The upper cover 1 of the washing machine is opened at a small angle, that is, the first cam 41 and the second cam 42 are relatively rotated, and the first cam 41 is rotated by a small angle with respect to the second cam 42 to drive the rotating shaft 3 to rotate at the same angle. The cam 41 and the second cam 42 are in contact with the end surface, and the rotating motion is converted into a linear motion. The second cam 42 moves along the axial direction of the rotating shaft, and the lever short arm 612 is moved to rotate the lever 61 around the supporting point 613 to make the lever long. One end of the arm 611 generates a motion; the end pushes the piston rod 51 together through the pin shaft to cause the piston rod 51 to move relative to the pressure cylinder 52; since the end of the pressure cylinder 52 is coupled with the cartridge pin shaft, the piston rod 51 and the pressure Relative movement between the cylinders 52, under the action of the liquid resistance inside the pressure cylinder 52, provides a damping force for the piston rod 51 to hinder the movement, thereby achieving the purpose of slowing the relative rotation rate of the rotating shaft 3, thereby achieving the damping effect. .

In the present invention, the length of the long arm of the lever is greater than the length of the short arm of the lever, so that the lever itself constitutes a core portion of the stroke amplifying mechanism, so that a small amplitude rotational displacement generated at the rotating shaft is converted into a large displacement displacement of the piston rod. The action of the damper is more sensitive, and the occurrence of the working condition of the damping liquid/gas in the pressure cylinder is avoided when the small amplitude displacement occurs at the rotating shaft, thereby improving the working stability and reliability of the damper.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention, and any technology that is familiar with the present patent. Those skilled in the art can make some modifications or modifications to equivalent embodiments by using the technical content of the above-mentioned hints without departing from the technical scope of the present invention, but the technology according to the present invention does not deviate from the technical solution of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments are still within the scope of the present invention.

Claims

A damper, comprising: a rotating shaft, a cam mechanism, a buffering mechanism and a stroke amplifying mechanism, and the rotating shaft rotates around the axial direction;

a cushioning mechanism that provides a cushioning force;

a cam mechanism connected to the rotating shaft to convert the relative rotation of the rotating shaft into a linear reciprocating motion;

The stroke amplifying mechanism is respectively connected to the cam mechanism and the buffer mechanism, and the small stroke motion transmission of the cam mechanism is enlarged to a large stroke motion of the buffer mechanism.
A damper according to claim 1 wherein:

a buffer mechanism that provides a buffering force to the axial direction of the rotating shaft;

The cam mechanism converts the buffering force in the axial direction provided by the buffer mechanism into the damping force in the rotating direction of the rotating shaft.
A damper according to claim 2, wherein said cam mechanism comprises a first cam and a second cam, the first cam being coupled to one end of the rotating shaft, integrally rotating with the rotating shaft, and the second cam and the stroke The amplifying mechanism is connected, the first cam and the second cam are end face cams, and the two are relatively rotated, and the end portions of the first cam and the second cam are in contact with each other, and the first cam is integrated with the rotating shaft. structure.
A damper according to claim 1 wherein:

a buffer mechanism that provides a buffering force perpendicular to the axial direction of the rotating shaft;

The cam mechanism converts the buffering force provided by the buffer mechanism perpendicular to the axial direction into a damping force in the rotating direction of the rotating shaft.
A damper according to claim 4, wherein said cam mechanism comprises a third cam connected to one end of the rotating shaft, integrally rotating with the rotating shaft, and the curved surface of the third cam rotating surface has a curved contour. The stroke amplifying mechanism is coupled to the cam rotating peripheral surface.
A damper according to claim 1, wherein said stroke amplifying mechanism comprises a lever, and the lever support point divides the lever into a short arm and a long arm, and one end of the long arm of the lever is connected to the buffer mechanism, and the lever short arm One end is connected to the cam mechanism;

Preferably, the stroke amplifying mechanism further comprises a moving rod, one end of the moving rod is connected with one end of the lever short arm, and the other end of the moving rod is connected with the cam mechanism.
A damper according to claim 3, wherein said stroke amplifying mechanism comprises a lever, and the lever support point divides the lever into a short arm and a long arm, and one end of the long arm of the lever is connected to the buffer mechanism, and the lever short arm One end is connected to the second cam;

Preferably, the stroke amplifying mechanism further comprises a moving rod, one end of the moving rod is connected with one end of the lever short arm, and the other end of the moving rod is connected with the second cam, and reciprocates in the axial direction together with the second cam, and then preferably moves The rod and the second cam are integrally formed. More preferably, the moving rod is sleeved with a return spring, or the moving rod and the short arm of the lever are provided with a torsion spring structure to increase the axial direction of the second cam to the first cam. Buffering force.
A damper according to claim 6 or 7, wherein the buffer mechanism is a pneumatic/hydraulic buffer mechanism, including a pressure cylinder and a piston rod, and one end of the piston rod is connected with one end of the long arm of the lever, and One end is disposed in the pressure cylinder, and the pressure cylinder is rotatably disposed at an end opposite to the piston rod.
A damper according to claim 1, further comprising a casing, the side wall of the casing is provided with a perforation, one end of the rotating shaft is extended by the perforation, and the other end extends in the casing, the cam mechanism and the buffer The mechanism and the stroke amplifying mechanism are movably mounted in the casing, and the rotating shaft rotates relative to the casing.
A washing machine comprising a disc holder and an upper cover connected to the disc holder, characterized in that: the upper cover and the disc holder have a damper according to any one of claims 1-9, preferably, the damper is mounted on The cover is provided with a hinge mounting seat, and the rotating shaft is inserted into the hinge mounting seat and fixed relative to the hinge mounting seat.