Rotary damper

Abstract

The utility model discloses a rotary damper. The problem that a damper using damping oil is easily mixed with air bubbles is mainly solved. The motor is characterized by further comprising an oil storage cavity (11) which is arranged in the shell, and at least part of the rotating shaft is rotatably arranged in the oil storage cavity; and the sponge piece (3) is arranged at the top of the oil storage cavity and is used for adsorbing residual bubbles in the damping oil. The utility model provides a rotary damper which can absorb bubbles which are not discharged from damping oil and improve assembly efficiency.

Description

Technical Field

[0001] The utility model relates to the field of dampers, in particular to a rotary damper. Background Art

[0002] A rotary damper is a device used to control the speed of rotary motion and provide a smooth damping effect. In the design of traditional rotary dampers, the damping oil flow speed between different pressure chambers is mainly relied on. The traditional rotary damper structure has a large damper cavity space. After oil filling, the air in the cavity sinks to the bottom and cannot be discharged in time, resulting in damping oil overflowing due to air pressure during assembly, and the flow of mixed air is unstable, affecting performance. The traditional solution needs to be left to stand for a period of time after oil filling, which affects efficiency and is uncontrollable. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the utility model provides a rotary damper, which mainly solves the problem that the conventional damper using damping oil is prone to be mixed with air bubbles.

[0004] The technical solution of the utility model is:

[0005] A rotary damper comprises a shell and a rotating shaft, and also comprises an oil storage chamber arranged in the shell, in which at least a part of the rotating shaft is rotatably arranged; a sponge member is arranged at the top of the oil storage chamber and is used to absorb residual bubbles in the damping oil.

[0006] The sponge piece is an annular structure and is sleeved on the circumferential outer wall of the rotating shaft.

[0007] The circumferential outer wall of the rotating shaft is provided with a boss, and the sponge member is arranged on the upper end surface of the boss.

[0008] A positioning shaft is provided at the bottom of the oil storage cavity, and an axis hole which is clearance-matched with the positioning shaft is provided on the rotating shaft.

[0009] The housing comprises a detachably connected base and an end cover.

[0010] A through hole is provided at the center of the end cover for part of the rotating shaft to extend out.

[0011] The inner wall of the end cover is provided with a sink groove coaxially arranged with the through hole, and a sealing ring is provided between the circumferential inner wall of the sink groove and the circumferential outer wall of the rotating shaft.

[0012] The beneficial effects of the utility model are as follows: the utility model provides a rotary damper which can absorb the air bubbles that are not discharged from the damping oil and increase the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the utility model.

[0014] Figure 2 It is a partial three-dimensional schematic diagram of an embodiment of the utility model.

[0015] Figure 3 It is a cross-sectional schematic diagram of an embodiment of the utility model.

[0016] Figure 4 for Figure 3 A magnified schematic diagram of center A. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings: as shown in the figure, a rotary damper includes a shell 1 and a rotating shaft 2, and also includes an oil storage chamber 11, which is arranged in the shell, and at least a part of the rotating shaft is rotatably arranged in the oil storage chamber; a sponge member 3 is arranged at the top of the oil storage chamber and is used to absorb residual bubbles in the damping oil.

[0018] Due to the high viscosity of damping oil, the air at the bottom cannot be squeezed out in time after the damping oil is injected, and the shell space is large, so the damping oil does not flow in a concentrated manner. The compressible and reset sponge member (ring) is placed inside the shell and can fill the inner cavity space. When the air at the bottom is not discharged, part of the damping oil is stored in the sponge ring (the sponge member itself contains a certain amount of damping oil). The sponge member is arranged above the damping oil liquid level, and its bottom can also contact the damping oil liquid level. When the air at the bottom of the damping liquid rises and is completely discharged, the sponge body is squeezed by pressure, and the damping oil in the sponge body can be released to flow into the shell cavity. The damping oil can also press the air into the sponge ring for storage, achieving a balance and improving stability. With this structure, there is no need to wait, and the installation is more efficient.

[0019] In this embodiment, as shown in the figure, the sponge member is an annular structure and is sleeved on the circumferential outer wall of the rotating shaft, which is convenient for installation.

[0020] In this embodiment, as shown in the figure, a boss 21 is provided on the circumferential outer wall of the rotating shaft, and the sponge member is provided on the upper end surface of the boss to fix the sponge member.

[0021] In this embodiment, as shown in the figure, a positioning shaft 111 is provided at the bottom of the oil storage cavity, and a shaft hole 22 is provided on the rotating shaft to be loosely matched with the positioning shaft. The installation is stable and not easy to slide. Of course, a mounting hole can also be provided in the housing, and a part of the rotating shaft can be installed in the mounting hole.

[0022] In this embodiment, as shown in the figure, the housing includes a detachably connected base 101 and an end cover 102. The housing can be installed together by threaded connection or riveting.

[0023] In this embodiment, as shown in the figure, the center of the end cover is provided with a through hole 1021 for part of the shaft to extend out. The part of the shaft extending out of the housing is used to transmit torque, and the structure is simple.

[0024] In this embodiment, as shown in the figure, the inner wall of the end cover is provided with a sink 1022 coaxially arranged with the through hole, and a sealing ring 103 is provided between the circumferential inner wall of the sink and the circumferential outer wall of the rotating shaft to prevent leakage and increase service life.

[0025] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] The embodiments described with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention. The embodiments should not be regarded as limiting the present invention, but any improvements based on the spirit of the present invention should be within the scope of protection of the present invention.

Claims

1. A rotary damper, comprising a housing (1) and a rotating shaft (2), characterized in that: Also includes An oil storage chamber (11) is disposed in the housing, and at least a portion of the rotating shaft is rotatably disposed in the oil storage chamber; The sponge member (3) is arranged at the top of the oil storage chamber and is used to absorb the residual bubbles in the damping oil.

2. A rotary damper according to claim 1, characterized in that: The sponge piece is an annular structure and is sleeved on the circumferential outer wall of the rotating shaft.

3. A rotary damper according to claim 1, characterized in that: A boss (21) is provided on the circumferential outer wall of the rotating shaft, and the sponge member is arranged on the upper end surface of the boss.

4. A rotary damper according to claim 1, characterized in that: A positioning shaft (111) is provided at the bottom of the oil storage cavity, and a shaft hole (22) that is clearance-matched with the positioning shaft is provided on the rotating shaft.

5. A rotary damper according to any one of claims 1 to 4, characterized in that: The housing comprises a detachably connected base (101) and an end cover (102).

6. A rotary damper according to claim 5, characterized in that: A through hole (1021) is provided at the center of the end cover for partially extending the rotating shaft.

7. A rotary damper according to claim 6, characterized in that: The inner wall of the end cover is provided with a sink groove (1022) coaxially arranged with the through hole, and a sealing ring (103) is provided between the circumferential inner wall of the sink groove and the circumferential outer wall of the rotating shaft.

Images