Electromagnetic damper

Abstract

The electromagnetic damper comprises a support, an electromagnetic assembly and a flywheel, the electromagnetic assembly comprises an iron core and coils, a plurality of tooth groove mechanisms are arranged on the iron core, the coils are wound in tooth grooves of the iron core, the coils are formed by winding the same group of wires, and the flywheel is arranged on the support. The winding directions of the coils in every two adjacent tooth grooves are opposite. The flywheel is arranged on the side, away from the support, of the electromagnetic assembly. According to the electromagnetic assembly, direct current is supplied to the electromagnetic assembly, the direction of the magnetic pole generated by each set of tooth grooves is not changed, external power drives the belt wheel to rotate to drive the flywheel to rotate, the flywheel cuts a magnetic field to generate magnetic control resistance, and therefore the magnetic control resistance is generated. The magnitude of the magnetic field is controlled by changing the magnitude of the current, so that the magnitude of resistance is controlled, and the control precision of the electromagnetic damper is higher. The electromagnetic assembly is arranged on the inner side of the flywheel, the structure is compact and stable, the electromagnetic air gap is small, magnetic leakage is little, and the power density is large.

Description

TECHNICAL FIELD

[0001] The utility model relates to an electromagnetic damper and belongs to the electromagnetic technical field. BACKGROUND

[0002] The electromagnetic damper is one of the common resistance sources of the exercise bicycle, and provides smooth resistance for the exercise bicycle through magnetic force and electromagnetic induction.

[0003] The existing electromagnetic damper adopts the mode of external electromagnet, has large electromagnetic air gap, and adopts the mode of single set of electromagnet or multiple sets of electromagnet assembly, and cannot achieve uniform distribution and continuity of magnetic poles. UTILITY MODEL CONTENT

[0004] In view of the defects of the prior art, the utility model aims at providing an electromagnetic damper which adopts multiple teeth grooves in the circumferential direction and multiple sets of coils, has more compact structure, more refined distribution of magnetic poles, and higher efficiency.

[0005] In order to achieve the above-mentioned utility model purposes, the utility model adopts the technical scheme of an electromagnetic damper which comprises a support, an electromagnetic assembly and a flywheel.

[0006] The flywheel is arranged on the side of the electromagnetic assembly away from the support, and the flywheel cuts the magnetic field generated by the energized electromagnetic assembly to form resistance when rotating.

[0007] Further, the inner surface of the support is provided with a brake shaft, the brake shaft is fixedly connected with the support, a cover plate is arranged between the flywheel and the brake shaft, one end of the cover plate is fixedly connected with the flywheel, and the other end of the cover plate is connected with the brake shaft through a bearing.

[0008] Further, multiple light coupling transmitters are arranged on the support, and the light coupling emitted by the light coupling transmitter is used for detecting the rotating speed of the flywheel through the light coupling holes.

[0009] Further, the outer surface of one end of the brake shaft is provided with a belt pulley, the belt pulley is connected with the cover plate, the belt pulley drives the flywheel to rotate, so that the flywheel cuts the magnetic field generated by the electromagnetic assembly to form resistance.

[0010] Further, a one-way bearing is arranged between the brake shaft and the belt pulley, and the belt pulley cannot react on the external power when the external power does not drive the belt pulley to rotate.

[0011] Further, the cover plate is provided with two, two cover plates are arranged on the both sides of the support.

[0012] Compared with the prior art, the advantages of the utility model include:

[0013] 1) The electromagnetic damper provided by the utility model, the electromagnetic assembly is arranged on the inner side of the flywheel, compact structure, stable structure, small electromagnetic air gap, small magnetic flux leakage, large power density;

[0014] 2) The electromagnetic damper provided by the utility model, the tooth groove on the iron core is small, and the magnetic flux leakage is small, so that the electromagnetic efficiency is high;

[0015] 3) The electromagnetic damper provided by the utility model, a plurality of tooth grooves are wound by the same group of wires, the winding directions of the coils in the adjacent two tooth grooves are opposite, the electromagnetic assembly of the application is passed through direct current, the magnetic pole directions generated by each group of tooth grooves are unchanged, the external power drives the belt pulley to rotate and drives the flywheel to rotate, the flywheel cuts the magnetic field to generate magnetic control resistance, the size of the resistance is controlled by changing the size of the current to control the size of the magnetic field, so that the control precision of the electromagnetic damper is higher;

[0016] 4) The electromagnetic damper provided by the utility model, a plurality of light coupling transmitters are arranged on the cover plate, the light coupling emitted by the light coupling transmitter is used for detecting the rotating speed of the flywheel at least through the light coupling hole; the light coupling hole arranged on the cover plate can reduce the weight of the cover plate on the one hand, and is used for the light coupling to pass through on the other hand, and is used for dissipating the heat generated by the flywheel rotation on the other hand;

[0017] 5) The electromagnetic damper provided by the utility model, the one-way bearing is connected with the brake shaft and the belt pulley, when the external power does not drive the belt pulley to rotate, the belt pulley will not react on the external power. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments described in the application, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0019] Figure 1 It is a whole structure schematic view of the electromagnetic damper provided in a typical embodiment case of the utility model;

[0020] Figure 2 It is a structure schematic view of the electromagnetic assembly provided in a typical embodiment case of the utility model;

[0021] Figure 3It is a typical embodiment of the utility model provides a kind of electromagnetic damper's front view;

[0022] Figure 4 It is the sectional view of A-A provided in a typical embodiment of the utility model.

[0023] Reference signs are explained: 1, support; 2, electromagnetic assembly; 4, flywheel; 5, iron core; 6, brake shaft; 7, cover plate; 8, bearing; 9, weight-reducing hole; 10, belt pulley; 11, one-way bearing. DETAILED DESCRIPTION

[0024] In view of the deficiencies in the prior art, the present inventors have long studied and practiced a lot to come up with the technical solution of the utility model. The technical solution, its implementation process and principles will be further explained as follows.

[0025] The utility model discloses an electromagnetic damper, as shown in Figures 1-4 The electromagnetic damper includes a support 1, an electromagnetic assembly 2 and a flywheel 4. The electromagnetic assembly is arranged on the outer ring of the support. The outer ring here refers to the outer ring in the radial direction of the circular support. The electromagnetic assembly 2 includes an iron core 5 and a coil. The iron core 5 is provided with a plurality of tooth groove structures. The positions of the iron core 5 and the coil correspond, and the coil is wound in the tooth groove of the iron core 5. The plurality of tooth grooves are wound by the same group of wires. The winding directions of the coils on the adjacent two iron cores 5 are opposite. The plurality of groups of coils can be in parallel connection, series connection or series connection plus parallel connection. In this way, the internal resistance of the overall coil can be conveniently adjusted, so that different controllers (current and voltage ranges) can be conveniently matched. The electromagnetic assembly is supplied with direct current. The magnetic pole directions generated by each group of tooth grooves are unchanged. The external power drives the belt pulley to rotate, which drives the flywheel to rotate. The flywheel cuts the magnetic field to generate magnetic control resistance. By changing the size of the current to control the size of the magnetic field, the size of the resistance is controlled, so that the control precision of the electromagnetic damper is higher.

[0026] In some embodiments, the flywheel 4 is arranged on the side of the electromagnetic assembly 2 away from the support 1. When the flywheel rotates, it cuts the magnetic field generated by the energized electromagnetic assembly to form resistance.

[0027] In some embodiments, the inner surface of the support 1 is provided with a brake shaft 6. The brake shaft 6 is fixedly connected with the support 1. A cover plate 7 is arranged between the flywheel 4 and the brake shaft 6. One end of the cover plate 7 is fixedly connected with the flywheel 4. The other end of the cover plate 7 is connected with the brake shaft 6 through a bearing 8. The flywheel 4 and the brake shaft 6 are connected through the cover plate 7 and the bearing 8. When the flywheel rotates, the cover plate 7 rotates with the flywheel.

[0028] Preferably, as Figure 1As shown, the cover plate 7 is provided with a plurality of lightening holes 9, and the support is provided with a light coupling transmitter, and the light coupling emitted by the light coupling transmitter is used for detecting the rotating speed of the flywheel at least. The cover plate 7 is provided with a plurality of lightening holes 9, which are used for installing the light coupling and dissipating the heat generated by the rotation of the flywheel 4.

[0029] In some embodiments, as shown in Figure 1 、 Figure 4 As shown, the outer surface of one end of the brake shaft 6 is provided with a belt pulley 10, the inner surface of one end of the belt pulley 10 is fixedly connected with the cover plate 7, and the belt pulley drives the flywheel to rotate, so that the flywheel cuts the magnetic field generated by the electromagnetic assembly to form resistance. The inner surface of the other end of the belt pulley 10 is connected with the brake shaft 6 through a one-way bearing 11, and the outer surface of the belt pulley 10 is provided with a plurality of belt grooves for placing belts, and the belt pulley 10 is connected with the external cycling equipment through the belts. When the exerciser rides the cycling equipment, the force is applied to the cycling equipment, and the force is transmitted to the belt pulley through the belts, the belt pulley rotates, the belt pulley rotates drives the flywheel to rotate through the cover plate, and the flywheel rotates cuts the magnetic field generated by the energized electromagnetic assembly to form resistance. The application connects the brake shaft 6 and the belt pulley 10 through the one-way bearing 11, and the belt pulley does not react to the external power when the external power does not drive the belt pulley to rotate, for example, the flywheel does not rotate to generate resistance when the person does not ride the cycling equipment, and the cycling equipment does not generate force to the person, that is, does not drive the person to move.

[0030] Preferably, the cover plate 7 is provided with two, and the two cover plates 7 are respectively arranged on the two sides of the support 1, so that the flywheel 4 rotates more balanced.

[0031] It should be understood that the above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and it cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. An electromagnetic damper, characterized in that: include A bracket (1), wherein an electromagnetic assembly (2) is provided on an outer ring of the bracket, the electromagnetic assembly (2) comprises an iron core (5) and a plurality of coils, the iron core (5) is provided with a plurality of tooth slot structures, the iron core (5) and the coils are positioned correspondingly and the coils are wound in the tooth slots of the iron core (5), the plurality of tooth slots are formed by winding the same set of conducting wires, and the winding directions of the coils in two adjacent tooth slots are opposite; A flywheel (4) is arranged on a side of the electromagnetic component (2) away from the bracket (1), and when the flywheel rotates, it cuts the magnetic field generated by the electromagnetic component being energized to form resistance.

2. The electromagnetic damper according to claim 1, characterized in that: A brake shaft (6) is provided on the inner surface of the bracket (1), and the brake shaft (6) is fixedly connected to the bracket (1). A cover plate (7) is provided between the flywheel (4) and the brake shaft (6), and one end of the cover plate (7) is fixedly connected to the flywheel (4), and the other end of the cover plate (7) is connected to the brake shaft (6) via a bearing (8).

3. The electromagnetic damper according to claim 2, characterized in that: The cover plate (7) is provided with a plurality of weight-reducing holes (9), and the bracket is provided with an optical coupler transmitter. The optical coupler emitted by the optical coupler transmitter passes through the weight-reducing holes and is at least used to detect the rotation speed of the flywheel.

4. The electromagnetic damper according to claim 2, characterized in that: A pulley (10) is provided on the outer surface of one end of the brake shaft (6), and the pulley (10) is connected to the cover plate (7). The rotation of the pulley drives the flywheel to rotate, so that the flywheel cuts the magnetic field generated by the electromagnetic component to form resistance.

5. The electromagnetic damper according to claim 4, characterized in that: A one-way bearing (11) is provided between the brake shaft (6) and the pulley (10), and when the external power does not drive the pulley to rotate, the pulley will not react to the external power.

6. The electromagnetic damper according to claim 4, characterized in that: Two cover plates (7) are provided, and the two cover plates (7) are respectively provided on both sides of the bracket (1).

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