Magnetic damper

Abstract

The utility model discloses a magnetic damper, and particularly relates to the field of mechanical damping accessories, the magnetic damper comprises a main transmission shaft, a plurality of bar magnets are fixedly arranged on the outer side of the top end of the main transmission shaft, a main body shell is arranged outside the main transmission shaft, and magnetic rings are fixedly arranged at the positions, opposite to the bar magnets, of the inner wall of the main body shell. According to the utility model, the strip-shaped magnet is fixedly arranged on the outer side of the main transmission shaft and the magnetic ring is fixed on the inner wall of the main body shell, and a magnetic field formed between the strip-shaped magnet and the magnetic ring is utilized to apply a magnetic resistance to the connecting boss of the main transmission shaft, so that the main transmission shaft generates a rotation resistance; when the torsion externally applied to the main transmission shaft is larger than the magnetic resistance of a product, the main transmission shaft rotates, the resistance is generated in a non-contact mode, the friction force is close to zero, abrasion and maintenance are reduced, the main transmission shaft which is an internal key component does not make contact with the main body shell, the torque is kept constant, and therefore the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical damping accessories, and more specifically, to a magnetic damper. Background Art

[0002] A damper is a device that provides resistance to movement and dissipates the energy of movement. Various dampers (or shock absorbers) have long been used in the aerospace, aviation, military, gun, automobile and other industries to reduce vibration and dissipate energy. Since the 1970s, people have gradually transferred these technologies to structural engineering such as buildings, bridges, and railways, and their development has been very rapid. In particular, the hydraulic viscous damper, which has a history of more than 50 years, has undergone a long process of a large number of experiments, strict reviews, repeated demonstrations, and especially earthquake tests before it was accepted by the structural engineering community in the United States.

[0003] A device that can quickly stop the movable part of the instrument at a stable deflection position. In seismic instruments, dampers are used to absorb the inherent vibration energy of the vibration system, and their damping force is generally proportional to the speed of the vibration system. There are three main types of dampers: liquid dampers, gas dampers, and electromagnetic dampers. Dampers play an important role in compensating for the small friction and air resistance in the vibration pickup pendulum system and improving the frequency response.

[0004] Contemporary industrial automation is developing rapidly, from Industry 1.0 to Industry 4.0, which puts higher requirements on processes and equipment. Dampers are widely used in industrial automation. The commonly used dampers are spring friction type, which applies a resistance to the rotating shaft through the spring. Because it is a friction type, the damping force will be unstable, reduced or even fail after a period of use. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the utility model provides a magnetic damper.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a magnetic damper, comprising a main transmission shaft, a plurality of bar magnets are fixedly provided on the outer side of the top end of the main transmission shaft, a main body shell is provided on the outside of the main transmission shaft, a magnetic ring is fixedly provided on the inner wall of the main body shell at the position corresponding to the bar magnets, a mounting bottom cover is detachably and movably connected to the top of the main body shell, and steering bearings are provided between the inner walls of the main body shell and the mounting bottom cover and the outer wall of the main transmission shaft.

[0007] In a preferred embodiment, a connecting boss is fixedly provided on the top of the main transmission shaft, the size of the connecting boss is larger than the size of the main transmission shaft, and a bar magnet is arranged at the position of the connecting boss.

[0008] In a preferred embodiment, a placement cavity is opened at the connection between the main shell and the main transmission shaft, and the top of the placement cavity is clamped with the installation bottom cover, and the main shell and the installation bottom cover are fixed by bolts.

[0009] In a preferred embodiment, a through groove is opened at the center of the top of the mounting bottom cover, and the number of the steering bearings is set to two, one steering bearing is arranged between the main drive shaft and the mounting bottom cover at the position of the through groove, and the other steering bearing is arranged between the main drive shaft at the bottom end of the cavity and the main shell.

[0010] In a preferred embodiment, the plurality of bar magnets are arranged in a ring array on the outer wall of the connecting boss, the bar magnets and the magnetic ring are both configured as strong permanent magnets, and the opposing surfaces of the bar magnets and the magnetic ring are configured with opposite poles.

[0011] Technical effects and advantages of the utility model:

[0012] The utility model adopts a structural setting in which a bar magnet is fixedly installed on the outer side of the main transmission shaft and a magnetic ring is fixedly installed on the inner wall of the main body shell, and utilizes the magnetic field formed between the bar magnet and the magnetic ring to apply a magnetic resistance to the connecting boss position of the main transmission shaft, thereby causing the main transmission shaft to generate a rotation resistance; when the external torsion force applied to the main transmission shaft is greater than the magnetic resistance of the product itself, the main transmission shaft will rotate, and the resistance is generated in a non-contact manner, which approaches zero friction, reduces wear and maintenance, and the main transmission shaft, an internal key component, has no contact with the main body shell, keeps the torque constant, thereby extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 For the utility model Figure 1 Schematic diagram of the cross section in state AA.

[0015] Figure 3 For the utility model Figure 2 Enlarged view of the structure of part A in the middle.

[0016] The reference numerals in the drawings are: 1 mounting bottom cover, 2 main body shell, 3 bar magnet, 4 magnetic ring, 5 steering bearing, 6 main transmission shaft, 7 through groove. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] The utility model provides a magnetic damper, including a main transmission shaft 6, a plurality of bar magnets 3 are fixedly arranged on the outer side of the top of the main transmission shaft 6, a main body shell 2 is arranged outside the main transmission shaft 6, a magnetic ring 4 is fixedly arranged at the position where the inner wall of the main body shell 2 and the bar magnets 3 are aligned, a mounting bottom cover 1 is detachably and movably connected to the top of the main body shell 2, and a steering bearing 5 is arranged between the inner walls of the main body shell 2 and the mounting bottom cover 1 and the outer wall of the main transmission shaft 6;

[0019] A connecting boss is fixedly provided on the top of the main transmission shaft 6, and the size of the connecting boss is larger than that of the main transmission shaft 6, and the bar magnet 3 is arranged at the position of the connecting boss, and a placement cavity is opened at the connection between the main housing 2 and the main transmission shaft 6, and the top of the placement cavity is clamped with the installation bottom cover 1, and the main housing 2 and the installation bottom cover 1 are fixed by bolts, and multiple bar magnets 3 are arranged in a circular array on the outer wall of the connecting boss, and the bar magnet 3 and the magnetic ring 4 are both set as strong permanent magnets, with a service life of 5-20 years, which is much higher than the same type of spring friction damper, and the counter surfaces of the bar magnet 3 and the magnetic ring 4 are set to be opposite poles;

[0020] A through slot 7 is provided at the center of the top of the mounting bottom cover 1, and the number of steering bearings 5 ​​is set to two, one steering bearing 5 is arranged between the main transmission shaft 6 and the mounting bottom cover 1 at the position of the through slot 7, and the other steering bearing 5 is arranged between the main transmission shaft 6 at the bottom end of the cavity and the main housing 2.

[0021] like Figure 1-3 As shown, the specific implementation is as follows: the magnetic damper is composed of a mounting bottom cover 1, a main body shell 2, a bar magnet 3, a magnetic ring 4, a steering bearing 5 and a main transmission shaft 6; the mounting bottom cover 1 is fixedly connected to the main body shell 2 by screws, and the main transmission shaft 6 is respectively connected to the main body shell 2 and the mounting bottom cover 1 by the steering bearing 5; the bar magnet 3 is evenly distributed around the largest outer circle of the main transmission shaft 6 and is fixedly connected by glue;

[0022] Its working process utilizes the magnetic field formed between the bar magnet 3 and the magnetic ring 4 to exert a magnetic resistance on the connecting boss of the main transmission shaft 6, thereby causing the main transmission shaft 6 to generate a rotation resistance; the main transmission shaft 6 will only rotate when the external torque exerted on the main transmission shaft 6 is greater than the magnetic resistance of the product itself;

[0023] That is, the main transmission shaft 6 is connected to the main housing 2 through the steering bearing 5, the bar magnet 3 is fixed to the main transmission shaft 6, the magnetic ring 4 is fixed to the main housing 2, and the bottom cover 1 is installed at the other end and connected to the main housing 2 to seal the internal structure, which can effectively prevent foreign matter such as welding slag and dust from entering the product, and butter or lubricating oil is added at the position of the through groove 7 to ensure smooth steering of the main transmission shaft 6; thereby making the product run more reliably and stably.

[0024] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0025] Secondly: In the drawings of the embodiments disclosed in the present utility model, only the structures related to the embodiments disclosed in the present utility model are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0026] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A magnetic damper, characterized in that: The invention comprises a main transmission shaft (6), a plurality of bar magnets (3) are fixedly provided on the outer side of the top end of the main transmission shaft (6), a main housing (2) is provided on the outside of the main transmission shaft (6), a magnetic ring (4) is fixedly provided at the position where the inner wall of the main housing (2) and the bar magnets (3) are aligned, a mounting bottom cover (1) is detachably and movably snap-connected on the top of the main housing (2), and a steering bearing (5) is provided between the inner walls of the main housing (2) and the mounting bottom cover (1) and the outer wall of the main transmission shaft (6).

2. A magnetic damper according to claim 1, characterized in that: A connecting boss is fixedly provided on the top of the main transmission shaft (6), the size of the connecting boss is larger than the size of the main transmission shaft (6), and the bar magnet (3) is arranged at the position of the connecting boss.

3. A magnetic damper according to claim 1, characterized in that: A placement cavity is provided at the connection between the main housing (2) and the main transmission shaft (6), and the top of the placement cavity is clamped with the installation bottom cover (1), and the main housing (2) and the installation bottom cover (1) are fixed by bolts.

4. A magnetic damper according to claim 3, characterized in that: A through slot (7) is provided at the center of the top end of the mounting bottom cover (1), and the number of the steering bearings (5) is set to two, one steering bearing (5) is arranged between the main transmission shaft (6) and the mounting bottom cover (1) at the position of the through slot (7), and the other steering bearing (5) is arranged between the main transmission shaft (6) at the bottom end of the placement cavity and the main body shell (2).

5. A magnetic damper according to claim 2, characterized in that: The plurality of bar magnets (3) are arranged in a ring array on the outer wall of the connecting boss; the bar magnets (3) and the magnetic ring (4) are both configured as strong permanent magnets, and the counter surfaces of the bar magnets (3) and the magnetic ring (4) are configured to have opposite poles.

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