An internal and external rotational damper

Abstract

This utility model provides an internal and external rotation damper, including an inner tube (1), characterized in that: an outer shell (2) is rotatably sleeved on the outside of the inner tube (1), and a sleeve (3) is provided between the outer wall of the inner tube (1) and the inner wall of the outer shell (2), the sleeve (3) being able to rotate relative to the inner tube (1), and damping oil or damping grease (4) being filled between the outer wall of the inner tube (1) and the inner wall of the outer shell (2) and between the end of the sleeve (3) and the inner wall of the outer shell (2); it can provide damping effect for the rotation process of multiple sets of external rotating parts relative to external fixed parts in unexpected directions, increasing the scope of application while effectively reducing the axial and radial dimensions of the sleeve and the outer shell, reducing the size of the damper itself and the space occupied, and saving costs.

Description

Technical Field

[0001] This utility model relates to the technical field of dampers, specifically to an internal and external rotating damper. Background Technology

[0002] A damper is a device that reduces the energy of motion by providing resistance to it. Currently, dampers are widely used in industries and fields such as aerospace, aviation, military, and automotive to achieve vibration reduction and energy dissipation.

[0003] In existing technology, dampers are often used with the fixed end of the damper connected to an external fixed part and the rotating end of the damper fixed to an external rotating part. When the external rotating part rotates relative to the external fixed part in an unexpected direction, the damping effect provided by the lubricating oil or grease inside the damper can effectively slow down and stop the rotation of the rotating end of the damper relative to the fixed end of the damper, thereby slowing down and stopping the rotation process of the external rotating part relative to the external fixed part in an unexpected direction.

[0004] For example, in the use of existing four-wheeled wheelchairs, the rear wheels are often driven by human power or electricity to provide forward power, and steering is achieved by controlling the differential speed of the rear wheels. The front wheels often adopt a swivel wheel structure to facilitate the movement of the wheelchair. However, during the forward movement, due to the swivel wheel structure, the front wheels may deflect and move forward in an unexpected direction. Therefore, it is necessary to provide corresponding damping devices for the front wheels of the wheelchair to provide motion resistance, thereby slowing down and stopping the forward movement of the front wheels in an unexpected direction.

[0005] However, existing technologies only provide one set of rotating ends for the damper outside the fixed end. Therefore, they can only provide damping for the rotation of a single external rotating part relative to the external fixed part in an unexpected direction, and cannot provide damping for the rotation of multiple external rotating parts relative to the external fixed part in an unexpected direction, thus limiting their applicability. On the other hand, to achieve this effect, multiple layers of damper rotating ends are often provided outside the fixed end of the damper, increasing the size and space occupied by the damper and increasing costs.

[0006] Therefore, there is an urgent need to provide a new solution to address the defects and shortcomings of the existing technologies. Utility Model Content

[0007] In order to overcome the shortcomings and deficiencies of the existing technology, this utility model proposes an internal and external rotation damper.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: An inner and outer rotating damper includes an inner tube, characterized in that: an outer shell is rotatably sleeved on the outside of the inner tube, a sleeve is provided between the outer wall of the inner tube and the inner wall of the outer shell, the sleeve is rotatable relative to the inner tube, and damping oil or damping grease is filled between the outer wall of the inner tube and the inner wall of the outer shell and between the end of the sleeve and the inner wall of the outer shell.

[0009] As a further preferred embodiment of the present invention, a first sealing ring is provided at the end of the inner tube away from the outer wall and the outer shell.

[0010] As a further preferred embodiment of the present invention, a second sealing ring is provided between the inner wall of the sleeve and the outer wall of the inner tube.

[0011] As a further preferred embodiment of this utility model, a third sealing ring is provided between the outer wall of the sleeve and the inner wall of the outer shell.

[0012] As a further preferred embodiment of the present invention, a first sealing groove for accommodating the first sealing ring is provided at the end of the outer wall of the inner tube away from the sleeve, and a second inner sealing groove for accommodating the second sealing ring is provided at the end of the outer wall of the inner tube close to the sleeve.

[0013] As a further preferred embodiment of the present invention, the outer wall of the inner tube is provided with an inner tube axial positioning part, which is located at the end further away from the sleeve than the first sealing groove.

[0014] As a further preferred embodiment of the present invention, the inner wall of the outer shell is configured as a stepped shape, and the inner wall on the side away from the sleeve protrudes inward compared with the inner wall on the side closer to the sleeve. An axial positioning part of the outer shell is fixedly provided at the end of the inner wall of the outer shell that protrudes inward and is positioned and cooperates with the axial positioning part of the inner tube.

[0015] As a further preferred embodiment of the present invention, an axial positioning groove for the outer shell is provided on the inner wall of the outer shell near the sleeve side.

[0016] As a further preferred embodiment of the present invention, a second outer sealing groove for accommodating a second sealing ring is formed between the inner wall of the sleeve and the outer wall of the inner tube, the second inner sealing groove and the second outer sealing groove are correspondingly matched, and a third sealing groove for accommodating a third sealing ring is formed between the outer wall of the sleeve and the inner wall of the outer shell.

[0017] As a further preferred embodiment of the present invention, the outer wall of the sleeve is fixedly provided with a sleeve axial positioning part that is positioned and cooperates with the axial positioning groove of the outer shell.

[0018] Compared with the prior art, the advantages and positive effects of this utility model include: (1) This utility model provides an internal and external rotation damper that can provide damping for the rotation process of multiple external rotating parts relative to external fixed parts in unexpected directions, thereby increasing the scope of application and effectively reducing the axial and radial dimensions of the sleeve and the outer shell, reducing the size of the damper itself and the space occupied, and saving costs.

[0019] (2) This utility model provides an internal and external rotation damper. A first sealing ring is provided between the outer wall of the inner tube and the inner wall of the outer shell and at the end away from the sleeve. A second sealing ring is provided between the inner wall of the sleeve and the outer wall of the inner tube. A third sealing ring is provided between the outer wall of the sleeve and the inner wall of the outer shell. The sealing rings provided at different positions in the axial direction can ensure the effective sealing of the damping oil or damping grease inside the damper during operation and reduce the possibility of unexpected leakage of damping oil or damping grease.

[0020] (3) This utility model provides an inner and outer rotation damper, which effectively ensures the axial positioning stability of the sleeve on the outside of the inner tube and the outer shell on the outside of the sleeve through the positioning cooperation between the inner tube axial positioning part and the outer shell axial positioning part, and the positioning cooperation between the sleeve axial positioning part and the outer shell axial positioning groove. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of an internal and external rotational damper proposed in this utility model; Figure 2 This is a schematic diagram of the split structure of an internal and external rotational damper proposed in this utility model; Figure 3 This is a cross-sectional structural diagram of an internal and external rotational damper proposed in this utility model; Legend: 1-Inner tube; 11-First sealing groove; 12-Second inner sealing groove; 13-Axial positioning part of inner tube; 2-Outer shell; 21-Outer shell axial positioning part; 22-Outer shell axial positioning groove; 3-Sleeve; 31-Second outer sealing groove; 32-Third sealing groove; 33-Sleeve axial positioning part; 4-Damping oil or damping grease; 5 - First sealing ring; 6-Second sealing ring; 7-Third sealing ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] [First Embodiment] like Figure 1-3 The first embodiment of this utility model shows an internal and external rotation damper, including an inner tube 1 and an outer shell 2 rotatably sleeved on the outside of the inner tube 1. A sleeve 3 is also provided between the outer wall of the inner tube 1 and the inner wall of the outer shell 2. The sleeve 3 can rotate relative to the inner tube 1. Damping oil or damping grease 4 is filled between the outer wall of the inner tube 1 and the inner wall of the outer shell 2, and between the end of the sleeve 3 and the inner wall of the outer shell 2. It can provide damping effect for the rotation process of multiple sets of external rotating parts relative to external fixed parts in unexpected directions, increasing the scope of application, effectively reducing the axial and radial dimensions of the sleeve and the outer shell, reducing the size of the damper itself and the space occupied, and saving costs.

[0026] like Figure 2-3As shown, in this embodiment, a first sealing ring 5 is provided between the outer wall of the inner tube 1 and the inner wall of the outer shell 2, and at the end away from the sleeve 3; a second sealing ring 6 is provided between the inner wall of the sleeve 3 and the outer wall of the inner tube 1; and a third sealing ring 7 is provided between the outer wall of the sleeve 3 and the inner wall of the outer shell 2. Thus, by providing multiple sealing rings at different positions in the axial direction, the internal damping oil or damping grease 4 of the damper can be effectively sealed during operation, thereby reducing the possibility of unintended leakage of damping oil or damping grease 4 from the axial gaps between the inner tube 1 and the sleeve 3, between the sleeve 3 and the outer shell 2, and between the inner tube 1 and the outer shell 2.

[0027] Based on this, in order to achieve the accommodating effect of the corresponding sealing ring, a first sealing groove 11 for accommodating the first sealing ring 5 is provided at the end of the outer wall of the inner tube 1 away from the sleeve 3, and a second inner sealing groove 12 for accommodating the second sealing ring 6 is provided at the end of the outer wall of the inner tube 1 close to the sleeve 3.

[0028] In order to achieve the axial positioning effect of the outer shell 2 relative to the inner tube 1, the outer wall of the inner tube 1 is provided with an inner tube axial positioning part 13, which is located at the end further away from the sleeve 3 than the first sealing groove 11.

[0029] The inner wall of the outer casing 2 is stepped, and the inner wall on the side away from the sleeve 3 protrudes inward compared to the inner wall on the side closer to the sleeve 3, so as to form a space for the damping oil or damping grease 4 and the sleeve 2. At the end of the inner wall of the outer casing 2 that protrudes inward, an axial positioning part 21 of the outer casing is fixedly provided, which is positioned and cooperates with the axial positioning part 13 of the inner tube. The axial positioning of the outer casing 2 relative to the inner tube 1 is stabilized by the positioning cooperation between the axial positioning part 21 of the outer casing and the axial positioning part 13 of the inner tube.

[0030] like Figure 2-3 As shown, in order to achieve the axial positioning effect of the sleeve 3 relative to the outer shell 2, the inner wall of the outer shell 2 near the sleeve 3 is provided with an outer shell axial positioning groove 22, and the outer wall of the sleeve 3 is fixedly provided with a sleeve axial positioning part 33 that is positioned and cooperates with the outer shell axial positioning groove 22. Through the positioning cooperation between the sleeve axial positioning part 33 and the outer shell axial positioning groove 22, the axial stable positioning effect of the sleeve 3 relative to the outer shell 2 is achieved.

[0031] In order to achieve the accommodating effect of the second sealing ring and the third sealing ring, a second outer sealing groove 31 for accommodating the second sealing ring 6 is formed between the inner wall of the sleeve 3 and the outer wall of the inner tube 1. The second inner sealing groove 12 and the second outer sealing groove 31 are correspondingly matched, and the second inner sealing groove 12 and the second outer sealing groove 31 together form the accommodating effect of the second sealing ring. A third sealing groove 32 for accommodating the third sealing ring 7 is formed between the outer wall of the sleeve 3 and the inner wall of the outer shell 2.

[0032] For example, when this damper is applied to a four-wheeled wheelchair, by fixing the inner tube 1 to the wheelchair body and fixing the two front wheels to the sleeve 3 and the outer shell 2 respectively, the internal damping oil or damping grease 4 provides resistance to the rotation of the sleeve 3 and the outer shell 2 relative to the inner tube 1 during the process of the front wheels deflecting and moving forward in an unexpected direction, thereby providing resistance to the two front wheels in the unexpected forward direction, effectively slowing down and stopping the forward movement of the wheelchair's front wheels in the unexpected direction.

[0033] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. An internal and external rotational damper comprising an inner tube (1), characterized in that: The outer shell (2) is rotatably fitted on the outside of the inner tube (1). A sleeve (3) is also provided between the outer wall of the inner tube (1) and the inner wall of the outer shell (2). The sleeve (3) can rotate relative to the inner tube (1). Damping oil or damping grease (4) is also filled between the outer wall of the inner tube (1) and the inner wall of the outer shell (2) and between the end of the sleeve (3) and the inner wall of the outer shell (2).

2. An internal and external rotational damper according to claim 1, characterized in that: A first sealing ring (5) is provided at the end of the inner tube (1) away from the outer wall and the inner wall of the outer shell (2) and away from the sleeve (3).

3. An internal and external rotational damper according to claim 2, characterized in that: A second sealing ring (6) is provided between the inner wall of the sleeve (3) and the outer wall of the inner tube (1).

4. An internal and external rotational damper according to claim 3, characterized in that: A third sealing ring (7) is provided between the outer wall of the sleeve (3) and the inner wall of the outer shell (2).

5. An internal and external rotational damper according to claim 4, characterized in that: The outer wall of the inner tube (1) away from the sleeve (3) has a first sealing groove (11) for accommodating the first sealing ring (5), and the outer wall of the inner tube (1) near the sleeve (3) has a second inner sealing groove (12) for accommodating the second sealing ring (6).

6. An internal and external rotational damper according to claim 5, characterized in that: The outer wall of the inner tube (1) is provided with an inner tube axial positioning part (13), which is located at the end further away from the sleeve (3) than the first sealing groove (11).

7. An internal and external rotational damper according to claim 6, characterized in that: The inner wall of the outer shell (2) is stepped, and the inner wall on the side away from the sleeve (3) protrudes inward compared to the inner wall on the side closer to the sleeve (3). An axial positioning part (21) for the outer shell (2) is fixedly provided at the end of the inner wall of the outer shell (2) that protrudes inward and is positioned and cooperates with the axial positioning part (13) of the inner tube.

8. An internal and external rotational damper according to claim 7, characterized in that: The inner wall of the outer shell (2) near the sleeve (3) is provided with an axial positioning groove (22).

9. An internal and external rotational damper according to claim 8, characterized in that: A second outer sealing groove (31) for accommodating the second sealing ring (6) is formed between the inner wall of the sleeve (3) and the outer wall of the inner tube (1). The second inner sealing groove (12) and the second outer sealing groove (31) are correspondingly matched. A third sealing groove (32) for accommodating the third sealing ring (7) is formed between the outer wall of the sleeve (3) and the inner wall of the outer shell (2).

10. An internal and external rotational damper according to claim 9, characterized in that: The outer wall of the sleeve (3) is fixedly provided with a sleeve axial positioning part (33) that is positioned and cooperates with the axial positioning groove (22) of the outer shell.

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