A damper

Abstract

This utility model provides a damper, comprising: a bushing, wherein a partition is provided inside the bushing to divide the interior of the bushing into a first and a second mounting cavity, the inner wall of the first mounting cavity is provided with a partition rib, and the partition is provided with a first and a second through hole corresponding to each other on the left and right sides of the partition rib; a shaft core, which is rotatably inserted into the first mounting cavity, and a first and a second damping element is provided on the outer periphery of the shaft core, the first and the second damping elements being located on both sides of the partition rib respectively, so as to construct a first and a second damping cavity for accommodating damping oil corresponding to each other on the left and right sides of the partition rib, and the first and the second damping cavities are connected by an oil passage gap; a movable plate, which is movably disposed in the second mounting cavity and abuts against the partition and blocks the second through hole through an elastic element, and the movable plate is provided with a third through hole communicating with the first through hole. This damper has a simple structure and a fast damping response speed.

Description

Technical Field

[0001] This utility model relates to the field of bathroom technology, specifically to a damper. Background Technology

[0002] A toilet typically consists of a ceramic seat, a hinge mechanism fixed to the ceramic seat, and a toilet seat hinged to the hinge mechanism. The toilet seat needs to be opened during use and is usually closed when the toilet is not in use. Currently, toilets are equipped with a damper on the hinge mechanism, and the toilet seat is connected to the damper; when the toilet seat falls about the hinge mechanism, the damper allows the toilet seat to descend slowly, preventing it from slamming onto the ceramic seat.

[0003] In the prior art, the damper used in toilet seat panels consists of a core, a bushing, and a damping element located between the core and the bushing. The damping oil is located in the cavity formed by the core and the bushing. By controlling the gap between the damping element, the bushing, and the core, the damper can achieve the functions of forward slow descent and reverse oil flow.

[0004] Existing dampers generally only have a damping effect when the toilet seat / toilet seat is flipped up to a predetermined angle (e.g., 45°) and then lowered. In other words, existing dampers generally require a certain amount of damping oil to flow as the toilet seat / toilet seat flips up to a predetermined angle before there is enough damping oil to exert a damping effect. Therefore, it is necessary to improve the damper. Utility Model Content

[0005] This invention aims to at least partially solve one of the technical problems in the aforementioned technologies. Therefore, the purpose of this invention is to provide a damper with a simple structure that can change its damping response speed according to the usage status of the toilet seat.

[0006] To achieve the above objectives, this utility model proposes a damper, which includes: A bushing, wherein a partition is provided inside the bushing to divide the interior of the bushing into a first mounting cavity and a second mounting cavity, the inner wall of the first mounting cavity is provided with a partition rib, and the partition is provided with a first through hole and a second through hole on the left and right sides of the partition rib respectively. A shaft core is rotatably inserted into a first mounting cavity. A first damping element and a second damping element are provided on the outer periphery of the shaft core. The first damping element and the second damping element are respectively located on the left and right sides of the partition rib, so as to construct a first damping cavity and a second damping cavity for accommodating damping oil on the left and right sides of the partition rib. The first damping cavity and the second damping cavity are connected through an oil passage gap. A movable plate is disposed in the second mounting cavity and can move axially along the second mounting cavity. The movable plate abuts against the partition plate through an elastic element and blocks the second through hole. The movable plate is provided with a third through hole communicating with the first through hole.

[0007] According to the present invention, a damper is provided, in which a first mounting cavity and a second mounting cavity are separated by a partition plate inside the bushing. A first damping element and a second damping element on the shaft core, together with a partition rib, form the first damping cavity and the second damping cavity. The first damping cavity and the second damping cavity are connected by an oil passage gap. A movable plate that can move elastically is provided inside the second mounting cavity. When the toilet seat is raised at a small angle, the damping oil can not only flow through the oil passage gap, but also quickly push open the movable plate, increasing the flow volume and speed of the damping oil. When the toilet seat is lowered, the movable plate, under the action of the elastic element, can quickly block the second through hole, and the damping oil flows through the oil passage gap, forming a slow descent of the toilet seat. This damper has a simple structure and a fast damping response speed.

[0008] In addition, the damper proposed according to the above embodiments of this utility model may also have the following additional technical features: Optionally, the inner wall of the second mounting cavity and the outer edge of the movable plate are fitted together by a concave-convex fit, so that the movable plate can move along the axial direction of the bushing.

[0009] Optionally, the movable plate is provided with a hollowed-out area connecting both sides of the movable plate.

[0010] Optionally, the partition has a mounting hole at its center, the rear end of the shaft passes through the mounting hole, and the movable plate is sleeved on the shaft.

[0011] Optionally, it also includes a rear end cover, which is sealed to the bushing, with one end of the elastic member abutting the rear end cover and the other end of the elastic member abutting the movable plate.

[0012] Optionally, the shaft may further include a connecting portion for connecting a toilet seat, the connecting portion extending out of the first mounting cavity.

[0013] Optionally, it also includes a connecting sleeve, which is sealed to the first mounting cavity, and the shaft is rotatably inserted through the connecting sleeve.

[0014] Optionally, the shaft core is provided with an oil passage notch at the front end face of the partition rib. When the oil passage notch is rotated to overlap with the axial projection of the front end face of the partition rib, the oil passage notch connects the first damping cavity and the second damping cavity.

[0015] Optionally, the outer peripheral surface of the shaft core is provided with a first mating area, a second mating area and a third mating area in sequence, the mating clearance between the partition rib and the first mating area, the second mating area and the third mating area gradually increases, the first through hole is located close to the partition rib, and the oil passage notch is located close to the third mating area. Attached Figure Description

[0016] Figure 1 An exploded view of the damper according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the damper according to an embodiment of the present utility model; Figure 3 for Figure 2 Sectional view along AA; Figure 4 This is a schematic diagram of the bushing structure according to an embodiment of the present utility model; Figure 5 for Figure 4 A structural diagram from another perspective; Figure 6 This is a partial structural schematic diagram of the damper according to an embodiment of the present utility model; Figure 7 This is a cross-sectional schematic diagram of the damper according to an embodiment of the present invention; Figure 8 This is a partial cross-sectional view of the damper according to an embodiment of the present utility model; Explanation of reference numerals in the attached figures: Bushing 1, partition 11, first through hole 111, second through hole 112, mounting hole 113, first mounting cavity 12, second mounting cavity 13, partition rib 14, protruding rib 15; Shaft core 2, first damping element 21, second damping element 22, oil passage notch 23, connecting part 24, first mating area 25, second mating area 26, third mating area 27; Movable plate 3, third through hole 31, groove 32, hollow part 33; Elastic element 4; Rear end cover 5, limiting groove 51; Connecting sleeve 6; First damping cavity a; Second damping cavity b; Oil passage gap c. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0018] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0019] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0020] The following is for reference. Figures 1-8 The implementation of the damper proposed in the embodiments of this utility model will be described in detail. Among them, Figure 3 and Figure 8 The arrow indicates the direction of the damping oil flow when the toilet seat is opened. Figure 7 The arrow in the image indicates the direction of damping oil flow when the movable plate is pushed open.

[0021] The damper according to an embodiment of the present invention includes: The bushing 1 has a partition 11 inside to divide the interior of the bushing 1 into a first mounting cavity 12 and a second mounting cavity 13. The inner wall of the first mounting cavity 12 is provided with a partition rib 14. The partition 11 has a first through hole 111 and a second through hole 112 on the left and right sides of the partition rib 14 respectively. The shaft core 2 is rotatably inserted into the first mounting cavity 12. The outer periphery of the shaft core 2 is provided with a first damping element 21 and a second damping element 22. The first damping element 21 and the second damping element 22 are respectively located on the left and right sides of the partition rib 14, so as to construct a first damping cavity a and a second damping cavity b for accommodating damping oil on the left and right sides of the partition rib 14. The first damping cavity a and the second damping cavity b are connected through an oil passage gap c. Movable plate 3 is disposed in the second mounting cavity 13 and can move along the axial direction of the second mounting cavity 13. Movable plate 3 abuts against partition plate 11 through elastic member 4 and blocks the second through hole 112. Movable plate 3 is provided with a third through hole 31 communicating with the first through hole 111.

[0022] In other words, the output end of the shaft core 2 is used to connect with the toilet seat. The shaft core 2 is rotatably mounted in the first mounting cavity 12 and forms a sealed connection with the first mounting cavity 12. A first damping element 21 and a second damping element 22 are provided on the outside of the shaft core 2. A partition rib 14 is provided on the inner wall of the first mounting cavity 12. The partition rib 14 is located between the first damping element 21 and the second damping element 22, dividing the space between the first damping element 21 and the second damping element 22 into a first damping cavity a and a second damping cavity b for accommodating damping oil. The first damping cavity a and the second damping cavity b are connected by an oil passage gap c, allowing the damping oil to flow between the first damping cavity a and the second damping cavity b through the oil passage gap c. When the toilet seat is opened, the first damping element 21 and the second damping element 22 rotate relative to the partition rib 14 simultaneously, and the movable plate 3 can be instantly opened. The damping oil in the second damping chamber b is pushed open, forming a channel between the movable plate 3 and the partition 11. The damping oil in the second damping chamber b can quickly flow into the first damping chamber a through the channel and the first through hole 111. When the toilet seat stops opening, the movable plate 3 quickly returns to its original position under the action of the elastic element 4 and blocks the second through hole 112, and the channel between the movable plate 3 and the partition 11 is closed. When the toilet seat is lowered, because the channel between the movable plate 3 and the partition 11 is closed, the damping oil in the first damping chamber a cannot be discharged into the second damping chamber b through the first through hole 111, the channel and the second through hole 112. The damping oil in the first damping chamber a is discharged into the second damping chamber b through the oil gap c, so that the toilet seat is lowered slowly. This makes the toilet seat have a stable damping effect when it is raised at a small angle or a large angle and then lowered.

[0023] The rotatable connection and sealing connection between the shaft core 2 and the bushing 1 can adopt existing structures. The oil passage gap c can also adopt existing structures. For example, the oil passage gap c is formed by the gap between the shaft core 2 and the partition rib 14. The cross-section of the mating part between the shaft core 2 and the partition rib 14 can be an irregular circle. The oil passage gap c is formed by the gradual transition from the interference fit to the gap fit when the shaft core 2 rotates and the partition rib 14. Alternatively, the oil passage gap c can be formed by the clearance fit between the first damping element 21 and the second damping element 22 and the inner wall of the first cavity a. The elastic element 4 can... The spring has two partition ribs 14, which are symmetrically arranged with respect to the axis of the first cavity. The first damping element 21 and the second damping element 22 can be integrally formed on the shaft core 2, and are symmetrically arranged with respect to the axis of the shaft core 2. In this way, two first damping cavities a and two second damping cavities b are formed in the first mounting cavity 12, making the force on the shaft core 2 more balanced and the damping performance more stable. The partition plate 11 can be integrally formed on the bushing 1. The toilet seat plate can be connected to the shaft core 2 or the bushing 1.

[0024] Thus, the bushing 1 is divided into a first mounting cavity 12 and a second mounting cavity 13 by a partition 11 inside the bushing 1. The first damping element 21 and the second damping element 22 of the shaft core 2, together with the partition rib 14, form a first damping cavity a and a second damping cavity b. The first damping cavity a and the second damping cavity b are connected by an oil passage gap c. The second mounting cavity 13 is provided with a movable plate 3 that can move elastically. When the toilet seat is lifted at a small angle, the damping oil can not only flow through the oil passage gap c, but also quickly push open the movable plate 3, thereby increasing the flow volume and flow speed of the damping oil. When the toilet seat is lowered, the movable plate 3 can quickly block the second through hole 112 under the action of the elastic element 4, and the damping oil can flow through the oil passage gap c, forming a slow descent of the toilet seat. This damper has a simple structure and a fast damping response speed.

[0025] Optionally, the inner wall of the second mounting cavity 13 and the outer edge of the movable plate 3 are fitted together by a concave-convex fit, so that the movable plate 3 can move along the axial direction of the bushing 1. Understandably, the concave-convex fit between the inner wall of the second mounting cavity 13 and the outer edge of the movable plate 3 prevents the movable plate 3 from rotating circumferentially, ensuring that the movable plate 3 moves only axially, guaranteeing the communication between the first through hole 111 and the third through hole 31, and ensuring the accuracy of blocking the second through hole 112 when the movable plate 3 is not pushed open. The inner wall of the second mounting cavity 13 may be provided with several ribs 15, and the outer edge of the movable plate 3 is provided with grooves 32 that match the ribs 15.

[0026] Optionally, the movable plate 3 is provided with a hollow section 33 connecting both sides of the movable plate 3. Understandably, since the second mounting cavity 13 contains damping oil, the damping oil in the first mounting cavity 12 is positioned through the hollow section 33 to more quickly push the movable plate open, reducing the resistance to the movement of the movable plate 3. When the movable plate 3 is pushed open by the damping oil, the damping oil can enter the first damping cavity a through the opening channel between the movable plate 3 and the partition plate 11, and then through the first through hole 111. This allows the damping oil to be discharged more quickly when the shaft core 2 rotates rapidly, further improving the damping response speed and avoiding operational sluggishness caused by restricted flow. It also makes lifting the toilet seat faster. The hollow section 33 can be arc-shaped, and there can be four hollow sections 33, spaced apart around the axis of the movable plate 3.

[0027] Optionally, the partition 11 has a mounting hole 113 at its center, through which the rear end of the shaft core 2 passes, and the movable plate 3 is fitted onto the shaft core 2. Understandably, by providing a mounting hole 113 at the center of the partition 11 for the rear end of the shaft core 2 to pass through, and by fitting the movable plate 3 onto the shaft core 2, structural fit accuracy can be ensured. The mounting hole 113 provides radial restraint to the shaft core 2, ensuring its concentricity during rotation and preventing changes in the gap between the damping element and the cavity wall due to offset. The movable plate 3, fitted onto the shaft core 2, restricts radial wobbling, ensuring stable axial movement only, guaranteeing a tight seal with the partition 11, and maintaining the reliability of the second through hole 112 blocking and the connection between the first through hole 111 and the third through hole 31.

[0028] Optionally, it also includes a rear end cover 5, which is sealed to the bushing 1. One end of the elastic element 4 abuts against the rear end cover 5, and the other end of the elastic element 4 abuts against the movable plate 3. Understandably, by setting the rear end cover 5 to be sealed to the bushing 1, and with both ends of the elastic element 4 abutting against the rear end cover 5 and the movable plate 3 respectively, a stable elastic adjustment system can be constructed. The rear end cover 5 seals the second mounting cavity 13, preventing damping oil leakage and providing a fixed support point for the elastic element 4, ensuring that the elastic force is evenly applied to the movable plate 3, so that the movable plate 3 tightly fits against the partition 11 to block the second through hole 112 when there is no oil pressure. A limiting groove 51 can be provided at the position of the rear end cover 5 facing the elastic element 4, and the rear end of the elastic element 4 extends into the limiting groove 51 and abuts against the rear end cover 5 to prevent the elastic element 4 from shifting. The rear end cover 5 and the bushing 1 can be ultrasonically welded.

[0029] Optionally, the shaft core 2 also includes a connecting portion 24 for connecting the toilet seat, the connecting portion 24 extending out of the first mounting cavity 12. Understandably, by providing the connecting portion 24 extending out of the first mounting cavity 12 on the shaft core 2, it is easier to connect with the toilet seat, improving the efficiency of the toilet seat connection. The outer peripheral surface of the connecting portion 24 can be configured as two opposing planes, facilitating the synchronous rotation of the shaft core 2 by the toilet seat.

[0030] Optionally, a connecting sleeve 6 is also included. The connecting sleeve 6 is sealed to the first mounting cavity 12, and the shaft core 2 is rotatably inserted through the connecting sleeve 6. Understandably, the sealed connection between the connecting sleeve 6 and the first mounting cavity 12, and the rotatable insertion of the shaft core 2 through the connecting sleeve 6, improves sealing and rotational stability. It also avoids the need for a complex structure in the bushing 1 to form a seal with the shaft core 2, reducing the processing difficulty of the bushing 1. A sealing ring can be used to seal the connecting sleeve 6 and the shaft core 2, and ultrasonic welding can be used to connect the connecting sleeve 6 and the bushing 1.

[0031] Optionally, the shaft core 2 is provided with an oil passage notch 23 at the front end face of the partition rib 14. When the oil passage notch 23 rotates to overlap with the axial projection of the front end face of the partition rib 14, the oil passage notch 23 connects the first damping cavity a and the second damping cavity b. Understandably, when the toilet seat is lowered, the oil passage notch 23 overlaps with the front projection of the partition rib 14. Part of the damping oil in the first damping cavity a can be discharged into the second damping cavity b through the oil passage gap c, and part of the damping oil is discharged into the second damping cavity b through the oil passage notch 23. This achieves a small or no damping effect on the toilet seat when the oil passage notch 23 is connected. As the oil passage notch 23 is misaligned with the front end of the partition rib 14, the oil passage notch 23 no longer connects the first damping cavity a and the second damping cavity b. The damping oil is discharged into the second damping cavity b only through the oil passage gap c, achieving a damping and slow-descent effect of the toilet seat when it is lowered to near its final position. Of course, the oil passage notch 23 can also be formed by the eccentric contact between the existing shaft core 2 and the partition rib 14 at the axial mating point.

[0032] Furthermore, the outer circumferential surface of the shaft core 2 is sequentially provided with a first mating area 25, a second mating area 26, and a third mating area 27. The mating clearance between the partition rib 14 and the first mating area 25, the second mating area 26, and the third mating area 27 gradually increases. The first through hole 111 is located near the partition rib 14, and the oil passage notch 23 is located near the third mating area 27. Understandably, when the toilet seat is fully lowered, the partition rib 14 engages with the first mating area 25. When the toilet seat is opened to a smaller angle, such as less than 45°, the partition rib 14 still engages with the first mating area 25, forming a smaller oil passage gap c. The damping oil in the second damping cavity b is discharged through the second through hole 112 into the channel formed between the partition 11 and the movable plate 3, and then through this channel into the first damping cavity a via the first through hole 111. Thus, even if the toilet seat is only opened to a smaller angle... Damping oil can also flow into the first damping cavity a through the channel between the movable plate 3 and the partition plate 11, improving the damping response. At this time, if the toilet seat is lowered directly, the toilet seat will be damped, achieving a slow descent. When the toilet seat is opened until the partition rib 14 engages with the second mating area 26, a medium oil passage gap c is formed. At the same time, the oil passage notch 23 connects the first damping cavity a and the second damping cavity b. The damping oil in the first damping cavity a can flow into the second damping cavity b through the medium oil passage gap c or the oil passage notch 23. When the toilet seat is opened until the partition rib 14 engages with the third mating area 27, a larger oil passage gap c is formed. At this time, the oil passage notch 23 remains connected. The damping oil in the first damping cavity a can flow into the second damping cavity b through the larger oil passage gap c or the oil passage notch 23 until the toilet seat is fully opened. During the process of lowering the toilet seat, the partition rib 14 engages with the third mating area 27, the second mating area 26, and the first mating area 25 in sequence to form a series of smaller gaps. When the oil passage gap c is closed and the partition rib 14 is engaged with the third engagement area 27 and the second engagement area 26, the oil passage notch 23 is in contact with the first damping cavity a and the second damping cavity b. During this stage, the toilet seat experiences minimal or no damping. When the partition rib 14 is engaged with the first engagement area 25, the oil passage notch 23 no longer connects the first damping cavity a and the second damping cavity b. The damping oil in the second damping cavity b flows only from the smaller oil passage gap c to the first damping cavity b, thus achieving a slow descent of the toilet seat. When the toilet seat is closed, the second through hole 112 can be located in the center of the second damping cavity b.

[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0038] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A damper, characterized in that, include: A bushing, wherein a partition is provided inside the bushing to divide the interior of the bushing into a first mounting cavity and a second mounting cavity, the inner wall of the first mounting cavity is provided with a partition rib, and the partition is provided with a first through hole and a second through hole on the left and right sides of the partition rib respectively. A shaft core is rotatably inserted into a first mounting cavity. A first damping element and a second damping element are provided on the outer periphery of the shaft core. The first damping element and the second damping element are respectively located on the left and right sides of the partition rib, so as to construct a first damping cavity and a second damping cavity for accommodating damping oil on the left and right sides of the partition rib. The first damping cavity and the second damping cavity are connected through an oil passage gap. A movable plate is disposed in the second mounting cavity and can move axially along the second mounting cavity. The movable plate abuts against the partition plate through an elastic element and blocks the second through hole. The movable plate is provided with a third through hole communicating with the first through hole.

2. The damper as described in claim 1, characterized in that, The inner wall of the second mounting cavity and the outer edge of the movable plate are fitted together by a concave-convex joint, so that the movable plate can move along the axial direction of the bushing.

3. The damper as described in claim 1, characterized in that, The movable plate has a hollowed-out section connecting both sides of the movable plate.

4. The damper as described in claim 1, characterized in that, The partition has a mounting hole at its center, the rear end of the shaft passes through the mounting hole, and the movable plate is sleeved on the shaft.

5. The damper as described in claim 1, characterized in that, It also includes a rear end cover, which is sealed to the bushing, with one end of the elastic element abutting the rear end cover and the other end of the elastic element abutting the movable plate.

6. The damper as claimed in claim 1, characterized in that, The shaft also includes a connecting part for connecting a toilet seat, the connecting part extending out of the first mounting cavity.

7. The damper as claimed in claim 1, characterized in that, It also includes a connecting sleeve, which is sealed to the first mounting cavity, and the shaft is rotatably inserted through the connecting sleeve.

8. The damper as claimed in claim 1, characterized in that, The shaft core has an oil passage notch at the front end face of the separator rib. When the oil passage notch rotates to overlap with the axial projection of the front end face of the separator rib, the oil passage notch connects the first damping cavity and the second damping cavity.

9. The damper as described in claim 8, characterized in that, The outer circumferential surface of the shaft core is provided with a first mating area, a second mating area and a third mating area in sequence. The mating clearance between the partition rib and the first mating area, the second mating area and the third mating area gradually increases. The first through hole is located close to the partition rib and the oil passage notch is located close to the third mating area.

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