Magnetic rotary damper

Abstract

The utility model discloses a magnetic rotary damper. The problem that a damper using damping oil is prone to failure is mainly solved. The magnetic ring (3) is arranged on the circumferential outer wall of the rotating shaft in a sleeving manner and rotates synchronously with the rotating shaft; the sleeve (5) is detachably installed in the shell, and at least part of the magnetic ring is arranged on the radial inner side of the sleeve and is in magnetic attraction fit with the sleeve. According to the magnetic rotary damper, damping oil is not used, product failure caused by oil leakage of the damper can be avoided, the bearing load and stability of the damper can be increased, and the safety performance is higher.

Description

Technical Field

[0001] The utility model relates to the field of dampers, in particular to a magnetic rotation 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 mainly relies on the flow speed between different pressure chambers. However, the damping oil will fluctuate attenuation in high and low temperature environments, so the stability is poor. Moreover, when the damping oil leaks in the cavity, the high-pressure chamber cannot be effectively formed to resist the load, which will cause the damping to fail directly. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the utility model provides a magnetic rotary damper, which mainly solves the problem that the existing damper using damping oil is prone to failure.

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

[0005] A magnetic rotary damper comprises a housing and a rotating shaft, wherein the rotating shaft is rotatably connected to the housing, and further comprises

[0006] A magnetic ring, sleeved on the circumferential outer wall of the rotating shaft and rotating synchronously with the rotating shaft;

[0007] The sleeve is detachably installed in the shell, and at least part of the magnetic ring is arranged on the radial inner side of the sleeve and is magnetically matched with the sleeve.

[0008] The magnetic ring is axially provided with a mounting hole, and the mounting hole is snap-fitted with the circumferential outer wall of the rotating shaft.

[0009] A convex ridge for transmitting torque is arranged in the mounting hole, and a transmission groove matched with the convex ridge is arranged on the circumferential outer wall of the rotating shaft.

[0010] A sink groove is provided at the bottom of the inner wall of the shell, and part of the rotating shaft is rotatably installed in the sink groove.

[0011] The sleeve is made of an elastic material and at least partially contacts the circumferential inner wall of the shell through elastic force when installed in the shell.

[0012] The outer wall of the sleeve is provided with a through groove penetrating along the length direction.

[0013] The housing comprises a detachably connected base and an end cover.

[0014] The beneficial effects of the utility model are as follows: the utility model provides a magnetic rotary damper, which does not use damping oil, can avoid oil leakage of the damper causing product failure, and can increase the bearing load and stability of the damper, with higher safety performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the utility model.

[0016] Figure 2 This is a schematic diagram of a magnetic ring according to an embodiment of the utility model.

[0017] Figure 3 The figure is an exploded schematic diagram of an embodiment of the utility model.

[0018] Figure 4 It is a cross-sectional schematic diagram of an embodiment of the utility model.

[0019] Figure 5 This is a schematic diagram of a magnetic ring according to an embodiment of the utility model. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings: As shown in the figure, a magnetic rotation damper includes a shell 1 and a rotating shaft 2, the rotating shaft is rotatably connected to the shell, and also includes a magnetic ring 3, which is sleeved on the circumferential outer wall of the rotating shaft and rotates synchronously with the rotating shaft; a sleeve 5 is detachably installed in the shell, at least part of the magnetic ring is arranged on the radial inner side of the sleeve and magnetically cooperates with the sleeve. An axial hole can be set in the shell for the rotation of the rotating shaft. The rotating shaft and the magnetic ring are fixedly connected and rotate synchronously. They can be installed by means of snap-in or bonding. Similarly, the sleeve can also be installed in the shell by means of snap-in or plug-in. There is a magnetic attraction between the sleeve and the magnetic ring. The magnetic field of the magnetic ring is divided into two halves along the diameter of the magnetic ring, one side is N and the other side is S (refer to Figure 5 ), during the rotation process, the magnetic attraction between the magnet and the bushing generates resistance, achieving a buffering effect. After installation, the magnetic ring is arranged in the radial direction of the sleeve, and the two may be in contact or not. Preferably, there is a gap to reduce friction and loss.

[0021] In this embodiment, as shown in the figure, the magnetic ring is axially provided with a mounting hole 31, and the mounting hole is engaged with the circumferential outer wall of the shaft. The magnetic ring can be mounted on the shaft by interference fit, etc., and the mounting is stable and will not fall off.

[0022] In this embodiment, as shown in the figure, a convex rib 311 for transmitting torque is provided in the mounting hole, and a transmission groove 21 matching with the convex rib is provided on the circumferential outer wall of the rotating shaft. The torque is transmitted by matching the convex rib and the transmission groove, which has a simple structure and can also increase the stability of the installation to a certain extent.

[0023] In this embodiment, as shown in the figure, a sink 11 is provided at the bottom of the inner wall of the housing, and part of the shaft is rotatably installed in the sink. The sink is used as an axis hole to realize the rotation of the shaft.

[0024] In this embodiment, as shown in the figure, the sleeve is made of elastic material and at least partially contacts the circumferential inner wall of the shell through elastic force when installed in the shell. It is convenient to install. After installation, it contacts the inner wall of the shell through its own elastic force to achieve positioning. No additional installation structure is required, which is more convenient to install.

[0025] In this embodiment, as shown in the figure, a through groove 51 is provided on the outer wall of the sleeve and is arranged to penetrate along the length direction, so as to provide the space required for the sleeve to be deformed (folded).

[0026] In this embodiment, as shown in the figure, the housing includes a detachably connected base 101 and an end cover 102. The end cover can be mounted on the base by interference fit or threaded connection.

[0027] 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.

[0028] 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.

[0029] 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 magnetic rotary damper, comprising a housing (1) and a rotating shaft (2), wherein the rotating shaft is rotatably connected to the housing, and characterized in that: Also includes A magnetic ring (3) is sleeved on the circumferential outer wall of the rotating shaft and rotates synchronously with the rotating shaft; The sleeve (5) is detachably mounted in the housing, and at least a portion of the magnetic ring is arranged on the radial inner side of the sleeve and is magnetically engaged with the sleeve.

2. A magnetic rotation damper according to claim 1, characterized in that: The magnetic ring is axially provided with a mounting hole (31), and the mounting hole is engaged with the circumferential outer wall of the rotating shaft.

3. A magnetic rotation damper according to claim 2, characterized in that: A ridge (311) for transmitting torque is provided in the mounting hole, and a transmission groove (21) matching the ridge is provided on the circumferential outer wall of the rotating shaft.

4. A magnetic rotation damper according to claim 1, characterized in that: A sink groove (11) is provided at the bottom of the inner wall of the shell, and part of the rotating shaft is rotatably installed in the sink groove.

5. A magnetic rotation damper according to claim 1, characterized in that: The sleeve is made of an elastic material and at least partially contacts the circumferential inner wall of the shell through elastic force when installed in the shell.

6. A magnetic rotation damper according to claim 5, characterized in that: The outer wall of the sleeve is provided with a through groove (51) penetrating along the length direction.

7. A magnetic rotation damper according to any one of claims 1 to 6, characterized in that: The housing comprises a detachably connected base (101) and an end cover (102).

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