A biaxial damper

Abstract

The present invention relates to a biaxial damper. The damper includes a first shaft (9) and a second shaft (11). The first shaft (9) is located inside the lower housing (2) and can rotate relative to the lower housing (2). An upper cover (13) is provided between the outer wall of one end of the second shaft (11) extending into the interior of the lower housing (2) and the inner wall of the lower housing (2). An external elastic member (3) is sleeved on the outer periphery of the sleeve (14). An internal elastic member (7) and friction plates (5, 8) are respectively arranged in the inner cavity of the lower housing (2). When the cover plate is opened and in the high position, the friction plates can provide frictional force to make the cover plate stay at the current position, realizing the high-position locking of the cover plate, avoiding the noise generated by the unexpected rapid fall of the cover plate, and also avoiding the damage caused by the rapid fall of the cover plate itself and posing a safety threat to the surrounding users.

Description

Technical Field

[0001] The present invention relates to the technical field of dampers, and in particular to a dual-axis damper. Background Art

[0002] With the development of science and technology, damping structures have gradually been used in many occasions, such as washing machine covers in household appliances. By adding damping structures, the noise generated when the cover falls rapidly can be avoided, while also avoiding collision impact and accidental injury to the human body.

[0003] However, the dampers in the prior art still have many defects and problems during use. For example, the existing patent document CN215255524U discloses a torsion spring damper with a bearing, which has the following defects:

[0004] 1) On the one hand, the position locking function of the cover cannot be realized when it is opened. When the cover is opened and in a high position, due to the lack of position locking, it is easy to fall unexpectedly quickly, which not only generates noise, but also causes damage to the cover itself and poses a safety threat to surrounding users.

[0005] 2) The cover does not need to be locked in the initial stage of opening, so there is a lack of free travel to facilitate the opening of the cover;

[0006] 3) The damper in the prior art adopts a single rotating shaft structure, and the rotating shaft is generally long in size, which is more likely to be damaged during use. Once damaged, the entire shaft needs to be replaced, which is time-consuming to install and remove and has high replacement costs.

[0007] Therefore, there is an urgent need to provide a new damping structure to solve the defects and shortcomings in the above-mentioned prior art. Summary of the Invention

[0008] In order to solve the defects and shortcomings in the above-mentioned prior art, the present invention provides a dual-axis damper.

[0009] The technical solution adopted in the present invention is:

[0010] A dual-axis damper includes a first shaft and a second shaft, the first shaft is located inside a lower shell and can rotate relative to the lower shell, one end of the second shaft extends into the lower shell and is connected to the first shaft, the other end of the second shaft passes through a sleeve and a bearing is fixedly sleeved on the outer periphery of the outlet end of the second shaft, an upper cover is provided between the outer wall of the end of the second shaft extending into the lower shell and the inner wall of the lower shell, an external elastic part is sleeved on the outer periphery of the sleeve, and an internal elastic part and a friction plate are provided in the inner cavity of the lower shell.

[0011] As a further preferred embodiment of the present invention, a plug is fixed to one end of the lower shell away from the second shaft.

[0012] As a further preferred embodiment of the present invention, a partition is provided protruding inside the lower housing. The inner diameter of the partition is matched with the outer diameter of the first shaft. The partition divides the inner cavity of the lower housing into a nut cavity and an elastic cavity. A nut and a friction plate are accommodated inside the nut cavity, and an internal elastic member and a friction plate are provided inside the elastic cavity.

[0013] As a further preferred embodiment of the present invention, the cross-section of the partition is in a T shape. Fixed friction plates are fixed in the stepped grooves on both sides of the partition. Rotating friction plates fixed to the first shaft are provided on both sides of the partition and outside the fixed friction plates. A first gasket is fixedly connected between the internal elastic member and the rotating friction plate in the elastic cavity.

[0014] As a further preferred embodiment of the present invention, the first shaft includes a protruding portion. An external connection portion is fixedly connected to one side of the protruding portion close to the second shaft, and a threaded portion is fixedly connected to the other side of the protruding portion away from the second shaft. The outer diameter of the external connection portion is larger than the outer diameters of the protruding portion and the threaded portion and is matched with the inner diameter of the lower housing. A connection groove connected to the second shaft is provided inside the external connection portion. A positioning groove is provided on the outer wall of the protruding portion, and an external thread matched with the nut is provided on the outer wall of the threaded portion.

[0015] As a further preferred embodiment of the present invention, the second shaft includes a penetrating portion. An internal connection portion is fixedly connected to one side of the penetrating portion close to the first shaft through a positioning plate, and a protruding portion is fixedly connected to the other side of the penetrating portion away from the first shaft. Both ends of the penetrating portion are respectively located inside the lower housing and the sleeve, and its outer diameter is respectively matched with the inner diameters of the upper cover and the sleeve. The outer diameter of the positioning plate is larger than the outer diameter of the penetrating portion and is matched with the inner diameter of the lower housing. The outer diameter of the protruding portion is smaller than the outer diameter of the penetrating portion. A bearing is fixedly sleeved on the outer periphery of the protruding portion.

[0016] As a further preferred embodiment of the present invention, the connection groove includes a first connection groove and a second connection groove that communicate with each other. The first connection groove is close to the second shaft, and the second connection groove is far from the second shaft, and the aperture of the first connection groove is larger than the aperture of the second connection groove;

[0017] The internal connection portion includes a first connection end and a second connection end that are connected to each other. The first connection end is far from the first shaft, and the second connection end is close to the first shaft, and the outer diameter of the first connection end is larger than the aperture of the second connection end;

[0018] The first connection end extends into the first connection groove for positioning cooperation therewith, and the second connection end extends into the second connection groove for positioning cooperation therewith;

[0019] And the cross-sectional area of the first connection groove is larger than the cross-sectional area of the first connection end.

[0020] As a further preferred embodiment of the present invention, a second gasket is provided between the upper cover and the positioning plate, a sealing ring is provided between the outer wall of the side of the upper cover away from the second shaft and the inner wall of the lower shell, and the outer wall of the side of the upper cover close to the second shaft is threadedly connected to the inner wall of the lower shell.

[0021] As a further preferred embodiment of the present invention, a retaining piece is provided on the side of the bearing close to the sleeve, and a retaining ring is provided on the side of the bearing away from the sleeve.

[0022] As a further preferred embodiment of the present invention, the external elastic member is a torsion spring, and the internal elastic member is a disc spring.

[0023] Compared with the prior art, the beneficial effects obtained by the present invention include:

[0024] (1) The present invention provides a double-axis damper. By arranging an internal elastic member and a friction plate in the lower shell, when the cover plate is opened and in the high position, the friction plate can provide frictional force to make the cover plate stay in the current position, realizing the high-position locking of the cover plate, avoiding the noise generated by the unexpected rapid fall of the cover plate, and also avoiding the damage of the cover plate itself caused by the rapid fall and posing a safety threat to the surrounding users.

[0025] (2) The present invention provides a double-axis damper. The first connection end extends into the first connection groove for positioning and matching, and the cross-sectional area of the first connection groove is larger than the cross-sectional area of the first connection end. Thus, the first connection groove with a larger cross-sectional area provides a free stroke for the first connection end to facilitate the opening of the cover plate through this free stroke at the initial stage of opening the cover plate.

[0026] (3) The present invention provides a double-axis damper. The double-axis structure of the first shaft and the second shaft with positioning and synchronous rotation replaces the single-rotation shaft structure in the prior art, reducing the possibility of damage during use. Once damaged, only a single first shaft or second shaft needs to be replaced, reducing the replacement cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of the present invention;

[0028] Figure 2 is an exploded view of the structure of the present invention;

[0029] Figure 3 is a cross-sectional view of the structure of the present invention;

[0030] Figure 4 is a schematic structural diagram of the first shaft of the present invention from the first perspective;

[0031] Figure 5 Structural schematic diagram of the second perspective of the first shaft of the present invention;

[0032] Figure 6 Structural schematic diagram of the second shaft of the present invention. Detailed description of the specific implementation

[0033] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0034] Please refer to Figures 1 - 6 A biaxial damper provided by the present invention includes a first shaft 9 and a second shaft 11. The first shaft 9 is located inside the lower housing 2 and can rotate relative to the lower housing 2. One end of the second shaft 11 extends into the lower housing 2 and is connected to the first shaft 9. The other end of the second shaft 11 passes through the sleeve 14, and a bearing 16 is fixedly sleeved on the outer periphery of the protruding end of the second shaft 11. An upper cover 13 is provided between the outer wall of the end of the second shaft 11 extending into the lower housing 2 and the inner wall of the lower housing 2. An external elastic member 3 is sleeved on the outer periphery of the sleeve 14, and both ends of the external elastic member 3 are fixedly connected to the bearing 16 and the sleeve 14 respectively. An internal elastic member 7 and friction plates 5, 8 are respectively arranged in the inner cavity of the lower housing 2; by providing an internal elastic member and friction plates in the lower housing, when the cover plate is opened and in the high position, the friction plates can provide frictional force to make the cover plate stay at the current position, realizing high-position locking of the cover plate, avoiding the noise caused by the unexpected rapid fall of the cover plate, and also avoiding damage to the cover plate itself caused by the rapid fall and posing a safety threat to surrounding users.

[0035] As Figures 2 - 3 shown, a plug 1 is fixed at one end of the lower housing 2 away from the second shaft 11. The plug ensures the sealed environment inside the lower housing 2 during operation, and the internal environment of the lower housing can also be cleaned by disassembling the plug 1 after long-term use.

[0036] As Figure 3 shown, in this embodiment, a partition 2-1 extends out inside the lower housing 2. The inner diameter of the partition 2-1 matches the outer diameter of the first shaft 9. The partition 2-1 divides the inner cavity of the lower housing 2 into a nut cavity C1 and an elastic cavity C2. The nut cavity C1 contains a nut 4 and friction plates 5, 8, and the elastic cavity C2 is provided with an internal elastic member 7 and friction plates 5, 8. In this embodiment, the internal elastic member 7 is preferably a disc spring. The friction plates include a fixed friction plate 5 and a rotating friction plate 8. The position locking of the cover plate is realized when it is in the high position after being opened through the frictional force between the fixed friction plate 5 and the rotating friction plate 8. The disc spring can provide a reverse damping force when the first shaft 9 rotates, and the damping force increases with the increase of the rotation angle, but remains less than the frictional force between the friction plates to ensure the position locking of the cover plate when it is in the high position after being opened.

[0037] Preferably, in this embodiment, the partition plate 2-1 has a T-shaped cross section. Fixed friction plates 5 are fixed in the stepped grooves on both sides of the partition plate 2-1. Rotating friction plates 8 fixed to the first shaft 9 are arranged on both sides of the partition plate 2-1 and outside the fixed friction plates 5. A first gasket 6 is fixedly connected between the internal elastic member 7 in the elastic cavity C2 and the rotating friction plate 8. When the rotating friction plate rotates synchronously with the first shaft 9, friction is generated between the rotating friction plate 8 and the fixed friction plate 5, and the friction force locks the position of the cover plate at a high position after it is opened. The first gasket 6 is used to axially limit the internal elastic member 7 to prevent unexpected displacement during operation. Both ends of the internal elastic member 7 are fixedly connected to the first gasket 6 and the first shaft respectively, and a reverse damping force can be provided when the first shaft 9 rotates, and the damping force increases as the rotation angle increases.

[0038] In this embodiment, as Figure 4 shown, the first shaft 9 includes an extending portion 9-2. An external connection portion 9-1 is fixedly connected to the side of the extending portion 9-2 close to the second shaft 11. The external connection portion 9-1 is used to fixedly connect to the second shaft 11. A threaded portion 9-3 is fixedly connected to the side of the extending portion 9-2 away from the second shaft 11. The threaded portion 9-3 extends into the damping cavity C1 and is threadedly connected to the nut 4. The outer diameter of the external connection portion 9-1 is larger than the outer diameters of the extending portion 9-2 and the threaded portion 9-3 and matches the inner diameter of the lower shell 2. A connection groove for connecting to the second shaft 11 is opened inside the external connection portion 9-1. A positioning groove 9-21 is opened on the outer wall of the extending portion 9-2. The positioning groove 9-21 is used to axially limit the rotating friction plate 8 on one side of the outer periphery of the first shaft 9. An external thread 9-31 that cooperates with the nut 4 is provided on the outer wall of the threaded portion 9-3. The nut 4 is used to axially limit the fixed friction plate 5 and the rotating friction plate 8 on the other side of the outer periphery of the first shaft 9.

[0039] In this embodiment, as Figure 6 shown, the second shaft 11 includes a penetrating portion 11-1. An internal connection portion is fixedly connected to the side of the penetrating portion 11-1 close to the first shaft 9 through a positioning plate 11-2. The internal connection portion is used to fixedly connect to the first shaft 9. An extending portion 11-3 is fixedly connected to the side of the penetrating portion 11-1 away from the first shaft 9. Both ends of the penetrating portion 11-1 are located inside the lower shell 2 and the sleeve 14 respectively, and its outer diameter matches the inner diameters of the upper cover 13 and the sleeve 14 respectively. The outer diameter of the positioning plate 11-2 is larger than the outer diameter of the penetrating portion 11-1 and matches the inner diameter of the lower shell 2. The outer diameter of the extending portion 11-3 is smaller than the outer diameter of the penetrating portion 11-1. A bearing 16 is fixedly sleeved on the outer periphery of the extending portion 11-3. The cover plate is fixedly connected to the bearing 16. When rotating and opening / closing, the cover plate drives the second shaft 11 and the first shaft 9 to rotate synchronously through the bearing 16.

[0040] Preferably, in this embodiment, as Figures 5 - 6 shown,

[0041] The connecting groove includes a first connecting groove 9-11 and a second connecting groove 9-12 that are in communication with each other. The first connecting groove 9-11 is disposed close to the second shaft 11, and the second connecting groove 9-12 is disposed away from the second shaft 11. Moreover, the aperture diameter of the first connecting groove 9-11 is larger than that of the second connecting groove 9-12.

[0042] The inner connecting portion includes a first connecting end 11-4 and a second connecting end 11-5 that are connected to each other. The first connecting end 11-4 is disposed away from the first shaft 9, and the second connecting end 11-5 is disposed close to the first shaft 9. Moreover, the outer diameter of the first connecting end 11-4 is larger than the aperture diameter of the second connecting end 11-5.

[0043] The first connecting end 11-4 extends into the interior of the first connecting groove 9-11 for positioning and mating therewith, and the second connecting end 11-5 extends into the interior of the second connecting groove 9-12 for positioning and mating therewith.

[0044] Moreover, the cross-sectional area of the first connecting groove 9-11 is larger than the cross-sectional area of the first connecting end 11-4.

[0045] Through the positioning and mating of the first connecting end 11-4 with the first connecting groove 9-11 and the positioning and mating of the second connecting end 11-5 with the second connecting groove 9-12, it is ensured that the first shaft 9 and the second shaft 11 can rotate synchronously during operation. At the same time, the plug-in connection method replaces the fixed connection method, which is convenient for disassembly, replacement, and maintenance. Preferably, as Figure 6 shown, the first connecting end 11-4 is arranged as a cylindrical shape for positioning and mating with the first connecting groove 9-11, and the second connecting end 11-5 is arranged as a prismatic shape with arcs on both sides for positioning and mating with the second connecting groove 9-12. While the positioning is stable, it is convenient to achieve synchronous rotation. And the cross-sectional area of the first connecting groove is set to be larger than the cross-sectional area of the first connecting end, so as to provide a free stroke for the first connecting end through the first connecting groove with a larger cross-sectional area. As Figure 5 shown, in this embodiment, the free stroke is set to 30°, so as to facilitate the opening of the cover plate through this free stroke at the initial stage of opening the cover plate.

[0046] As Figure 3 shown, a second gasket 10 is provided between the upper cover 13 and the positioning plate 11-2. A sealing ring 12 is provided between the outer wall of the side of the upper cover 13 away from the second shaft 11 and the inner wall of the lower shell 2 to further achieve the internal sealing effect of the lower shell 2. The outer wall of the side of the upper cover 13 close to the second shaft 11 is threadedly connected to the inner wall of the lower shell 2.

[0047] In this embodiment, a retaining piece 15 is provided on one side of the bearing 16 close to the sleeve 14, and a retaining ring 17 is provided on the side of the bearing 16 away from the sleeve 14. While realizing the axial limit of the bearing 16 through the retaining piece 15 and the retaining ring 17, one end of the retaining piece 15 is fixedly connected to one end of the external elastic member 3. In this way, when the cover plate rotates, it can drive the external elastic member 3 to rotate synchronously. Since the external elastic member 3 is a torsion spring or other elastic member with a preset damping force, the preset damping force will provide a damping force to the cover plate that closes quickly during rotation. At the same time, due to the frictional force between the fixed friction plate 5 and the rotating friction plate 8, the cover plate can be locked in position at a high position when it is opened, and when it falls, the user needs to continuously apply an external force to make the cover plate fall, thereby avoiding noise and collision impact damage caused by rapid closing. As a preference of this embodiment, the external elastic member 3 is a torsion spring, and the internal elastic member has a disc spring.

[0048] The double-axis damper provided in this embodiment can be used alone or can be used in pairs in the opposite setting in occasions where rapid rotational closing may occur, such as the cover plate of a washing machine in household appliances, as Figure 1 shown.

[0049] The specific working process of this embodiment is as follows:

[0050] When opening the cover plate, the user drives the second shaft 11 fixedly connected thereto to rotate through the bearing 16. At this time, the first shaft 9 does not rotate synchronously. When the free stroke is exceeded (30° in this embodiment), due to the positioning cooperation, the first shaft 9 rotates synchronously with the second shaft 11. When the first shaft 9 rotates relative to the lower housing 2, the rotating friction plate 8 inside the lower housing 2 rotates relative to the fixed friction plate 5 to generate a frictional force. This frictional force enables the opened cover plate that has exceeded the free stroke to stay in the current position to achieve position locking;

[0051] When closing the cover plate, the user continuously applies an external force to overcome the frictional force, and at the same time, the cover plate falls and closes under the damping force of the external elastic member 3 and the internal elastic member 7.

[0052] Inspired by the above ideal embodiment according to the present invention, through the above description, relevant staff can make various changes and modifications completely within the scope of not deviating from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A biaxial damper, the damper comprising a first shaft (9) and a second shaft (11), the first shaft (9) being located inside the lower housing (2) and capable of rotating relative to the lower housing (2), one end of the second shaft (11) extending into the interior of the lower housing (2) to be connected to the first shaft (9), the other end of the second shaft (11) passing through the sleeve (14) and a bearing (16) being fixedly sleeved on the outer periphery of the protruding end of the second shaft (11), an upper cover (13) being provided between the outer wall of the end of the second shaft (11) extending into the interior of the lower housing (2) and the inner wall of the lower housing (2), an external elastic member (3) being sleeved on the outer periphery of the sleeve (14), and an internal elastic member (7) and friction plates (5, 8) being provided in the inner cavity of the lower housing (2); A plug (1) is fixed to the end of the lower housing (2) remote from the second shaft (11); The first shaft (9) comprises an extending portion (9-2), an external connection portion (9-1) being fixedly connected to one side of the extending portion (9-2) close to the second shaft (11), a threaded portion (9-3) being fixedly connected to the side of the extending portion (9-2) remote from the second shaft (11), the outer diameter of the external connection portion (9-1) being larger than the outer diameters of the extending portion (9-2) and the threaded portion (9-3) and being matched with the inner diameter of the lower housing (2), a connection groove for connecting to the second shaft (11) being formed inside the external connection portion (9-1), a positioning groove (9-21) being formed on the outer wall of the extending portion (9-2), and an external thread (9-31) for cooperating with a nut (4) being provided on the outer wall of the threaded portion (9-3); The second shaft (11) comprises a penetrating portion (11-1), an internal connection portion being fixedly connected to one side of the penetrating portion (11-1) close to the first shaft (9) through a positioning plate (11-2), an extending portion (11-3) being fixedly connected to the side of the penetrating portion (11-1) remote from the first shaft (9), both ends of the penetrating portion (11-1) being located inside the lower housing (2) and the sleeve (14) respectively, and its outer diameter being matched with the inner diameters of the upper cover (13) and the sleeve (14) respectively, the outer diameter of the positioning plate (11-2) being larger than the outer diameter of the penetrating portion (11-1) and being matched with the inner diameter of the lower housing (2), the outer diameter of the extending portion (11-3) being smaller than the outer diameter of the penetrating portion (11-1), and a bearing (16) being fixedly sleeved on the outer periphery of the extending portion (11-3); The connection groove comprises a first connection groove (9-11) and a second connection groove (9-12) which communicate with each other, the first connection groove (9-11) being arranged close to the second shaft (11), the second connection groove (9-12) being arranged remote from the second shaft (11), and the aperture of the first connection groove (9-11) being larger than the aperture of the second connection groove (9-12); The inner connecting part includes a first connecting end (11-4) and a second connecting end (11-5) which are connected to each other. The first connecting end (11-4) is arranged away from the first shaft (9), and the second connecting end (11-5) is arranged close to the first shaft (9). The outer diameter of the first connecting end (11-4) is larger than the aperture diameter of the second connecting end (11-5). The first connecting end (11-4) extends into the first connecting groove (9-11) for positioning and cooperation therewith, and the second connecting end (11-5) extends into the second connecting groove (9-12) for positioning and cooperation therewith. Moreover, the cross-sectional area of the first connecting groove (9-11) is larger than the cross-sectional area of the first connecting end (11-4).

2. The biaxial damper according to claim 1, wherein: A partition plate (2-1) extends out inside the lower shell (2). The inner diameter of the partition plate (2-1) is matched with the outer diameter of the first shaft (9). The partition plate (2-1) divides the inner cavity of the lower shell (2) into a nut cavity (C1) and an elastic cavity (C2). A nut (4) and friction plates (5, 8) are accommodated inside the nut cavity (C1), and an internal elastic member (7) and friction plates (5, 8) are arranged inside the elastic cavity (C2).

3. The biaxial damper according to claim 2, wherein: The cross-section of the partition plate (2-1) is in a T shape. Fixed friction plates (5) are fixed in the stepped grooves on both sides of the partition plate (2-1). Rotating friction plates (8) fixed to the first shaft (9) are arranged on both sides of the partition plate (2-1) and outside the fixed friction plates (5). A first gasket (6) is fixedly connected between the internal elastic member (7) and the rotating friction plate (8) in the elastic cavity (C2).

4. A biaxial damper according to claim 1, characterized in that: A second gasket (10) is arranged between the upper cover (13) and the positioning plate (11-2). A sealing ring (12) is arranged between the outer wall of the side of the upper cover (13) away from the second shaft (11) and the inner wall of the lower shell (2). The outer wall of the side of the upper cover (13) close to the second shaft (11) is threadedly connected to the inner wall of the lower shell (2).

5. A biaxial damper according to claim 1, characterized in that: A retaining piece (15) is arranged on the side of the bearing (16) close to the sleeve (14), and a retaining ring (17) is arranged on the side of the bearing (16) away from the sleeve (14).

6. A biaxial damper according to claim 1, characterized in that: The external elastic member (3) is selected as a torsion spring, and the internal elastic member (7) is selected as a disc spring.

Images