A wheel brake device utilizing electromagnetic braking

Abstract

The present invention provides an aircraft wheel brake device utilizing electromagnetic braking. The device comprises a wheel hub, an electromagnetic assembly disposed within a cavity within the wheel hub, and a braking mechanism disposed between the electromagnetic assembly and the inner surface of the wheel hub. The wheel hub is secured to the tire via a hub disc. A bearing is also provided within the wheel hub for supporting and adjusting the position of the electromagnetic assembly. A braking groove is provided on the inner end surface of the wheel hub cavity for engaging with the braking mechanism. The device controls the electromagnetic force of the electromagnet by adjusting the current or voltage of the brake device's electromagnet, thereby varying the relative friction between the electromagnetic assembly's friction plate and the braking mechanism, ultimately achieving desired braking.

Description

Technical Field

[0001] The present invention belongs to the technical field of unmanned aerial vehicle (UAV) brake systems, and in particular relates to a wheel brake device utilizing electromagnetic braking. Background Art

[0002] In recent years, with the development of drone technology, more and more drones have appeared in our lives. As drones develop towards ultra-high speed, high maneuverability, lightweight, miniaturization, and low cost, traditional hydraulic and pneumatic brakes can no longer meet the needs of small drones due to their disadvantages such as heavy weight, large size, and high maintenance costs. Summary of the Invention

[0003] In order to solve the above problems, the present invention provides a wheel brake device suitable for small unmanned aerial vehicles. According to the braking distance requirements of the unmanned aerial vehicle, the electromagnetic force of the electromagnet is controlled by adjusting the current or voltage of the brake device electromagnet, thereby changing the relative friction between the friction plate of the electromagnetic component and the brake mechanism, and ultimately achieving the braking requirements.

[0004] The object of the present invention is to provide a wheel brake device utilizing electromagnetic braking, the brake device comprising a wheel hub, an electromagnetic assembly arranged in a hollow cavity of the wheel hub, and a braking mechanism arranged between the electromagnetic assembly and the inner surface of the wheel hub. The wheel hub is fixed to the tire via a wheel hub disc. The wheel hub is also provided with a bearing for supporting and adjusting the position of the electromagnetic assembly. The end face of the inner cavity of the wheel hub is provided with a brake groove that cooperates with the braking mechanism.

[0005] The wheel brake device using electromagnetic braking provided by the present invention also has the following characteristics: the wheel hub also includes a magnetic coating provided on the inner wall of the cavity for adsorbing the braking mechanism and a bearing seat provided at the axial center position of the hollow cavity.

[0006] The wheel brake device using electromagnetic braking provided by the present invention also has the following characteristics: the electromagnetic assembly includes a first electromagnet, a second electromagnet and a third electromagnet arranged in sequence from the outside to the inside, and a first friction plate is provided on the outside of the first electromagnet, the second electromagnet and the third electromagnet.

[0007] The wheel brake device utilizing electromagnetic braking provided by the present invention also has the following characteristics: the first electromagnet includes a hollow top shaft that cooperates with the inner ring of the bearing, a guide shaft for fitting the second electromagnet and the third electromagnet, a first coil slot provided on the guide shaft, and a first coil wound in the first coil slot.

[0008] The wheel brake device utilizing electromagnetic braking provided by the present invention also has the following characteristics: the second electromagnet includes a second coil slot whose inner ring matches the guide shaft and a second coil wound in the second coil slot.

[0009] The wheel brake device utilizing electromagnetic braking provided by the present invention also has the following characteristics: the third electromagnet includes a third coil slot whose inner ring cooperates with the guide shaft and a third coil wound in the third coil slot; the inner side of the third coil slot is provided with a groove for fixing the second friction plate.

[0010] The wheel brake device utilizing electromagnetic braking provided by the present invention also has the following characteristics: the first electromagnet, the second electromagnet, the third electromagnet and the first friction plate are fixed by a guide pin, and the first electromagnet, the second electromagnet, the third electromagnet and the first friction plate are all provided with a guide hole for passing the guide pin.

[0011] The wheel brake device using electromagnetic braking provided by the present invention also has the following characteristics: the braking mechanism includes a brake pad that cooperates with the inner ring of the wheel hub, a brake disc that is gap-fitted with the brake groove, and a magnet fixed to the end face of the inner cavity of the wheel hub, and the end face of the inner cavity of the wheel hub is provided with a magnet groove for fixing the magnet.

[0012] The wheel brake device using electromagnetic braking provided by the present invention also has the following characteristics: during operation, the brake pad and the outer ring of the electromagnetic component are attracted to generate friction force, the magnetic force of the magnet on the brake disc is smaller than the magnetic force provided by the electromagnetic component, and the inner surface of the electromagnetic component generates friction force with the brake disc.

[0013] The wheel brake device utilizing electromagnetic braking provided by the present invention also has the characteristic that the brake pad is a fan-shaped structure.

[0014] Beneficial effects:

[0015] The wheel brake device using electromagnetic braking provided by the present invention has a compact structure, small size, light weight, easy control, low cost, and good braking effect, and can make up for the shortcomings of traditional hydraulic and pneumatic braking devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A cross-sectional view of an electromagnetic wheel device provided by an embodiment of the present invention;

[0018] Figure 2 is an exploded view of the electromagnetic wheel device in an embodiment of the present invention;

[0019] Figure 3 Schematic diagram of the structure of the electromagnet in an embodiment of the present invention;

[0020] Figure 4 This is a schematic structural diagram of a wheel hub in an embodiment of the present invention;

[0021] Figure 5 Schematic diagram of an electromagnet housing with a friction plate and a coil in an embodiment of the present invention;

[0022] Figure 6 Schematic diagram of the structure of the first electromagnet housing with a coil in an embodiment of the present invention,

[0023] Among them, 1: electromagnetic assembly; 11: first friction plate; 12: first electromagnet; 12-1: first coil; 12-2: first coil slot; 12-3: guide shaft; 12-4: hollow top shaft; 13: second electromagnet; 14: third electromagnet; 14-1: third coil; 14-2: groove; 14-3: third coil slot; 15: guide pin; 2: brake pad; 3: brake disc; 4: magnet; 5: bearing 1; 6: wheel hub; 61: magnetic coating; 62: brake slot; 63: bearing seat; 64: magnet slot; 7: tire; 8: bearing 2; 9: wheel hub; 10: screw. DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments and accompanying drawings specifically illustrate the wheel brake device using electromagnetic braking provided by the present invention.

[0025] In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the invention.

[0026] Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified with "first," "second," etc., may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0027] The terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0028] like Figure 1-6 As shown, a wheel brake device utilizing electromagnetic braking is provided. The brake device includes a wheel hub 6, an electromagnetic assembly 1 disposed within a cavity within the wheel hub 6, and a braking mechanism disposed between the electromagnetic assembly 1 and the inner surface of the wheel hub 6. The wheel hub 6 is secured to the tire 7 via a wheel hub disc 9. A bearing is also disposed within the wheel hub 6 for supporting and adjusting the position of the electromagnetic assembly 1. A braking groove 62 is disposed within the inner end surface of the wheel hub 6 for engaging with the braking mechanism. The bearings include bearings 1-5 and 2-8.

[0029] In some embodiments, the wheel hub 6 further includes a magnetic coating 61 provided on the inner wall of the cavity for adsorbing the braking mechanism and a bearing seat 63 provided at the axial center of the hollow cavity.

[0030] In some embodiments, the electromagnetic assembly 1 includes a first electromagnet 12, a second electromagnet 13 and a third electromagnet 14 arranged in sequence from the outside to the inside, and a first friction plate 11 is provided on the outside of the first electromagnet 12, the second electromagnet 13 and the third electromagnet 14.

[0031] In some embodiments, the first electromagnet 12 includes a hollow top shaft 12-4 that cooperates with the inner ring of the bearing, a guide shaft 12-3 for mounting the second electromagnet 13 and the third electromagnet 14, a first coil slot 12-2 arranged on the guide shaft 12-3, and a first coil 12-1 wound in the first coil slot 12-2.

[0032] In some embodiments, the second electromagnet 13 includes a second coil groove whose inner ring cooperates with the guide shaft 12 - 3 and a second coil wound in the second coil groove.

[0033] In some embodiments, the third electromagnet 14 includes a third coil slot 14-3 whose inner ring cooperates with the guide shaft 12-3 and a third coil 14-1 wound in the third coil slot 14-3, and a groove 14-2 for fixing the second friction plate is provided on the inner side of the third coil slot 14-3.

[0034] In some embodiments, the first electromagnet 12, the second electromagnet 13, the third electromagnet 14 and the first friction plate 11 are fixed by a guide pin 15, and the first electromagnet 12, the second electromagnet 13, the third electromagnet 14 and the first friction plate 11 are provided with a guide hole for passing the guide pin.

[0035] In some embodiments, the braking mechanism includes a brake pad 2 that cooperates with the inner ring of the wheel hub 5, a brake disc 3 that is clearance-fitted with the brake groove 62, and a magnet 4 fixed to the inner end face of the wheel hub 6. The inner end face of the wheel hub 6 is provided with a magnet groove 64 for fixing the magnet.

[0036] In some embodiments, during operation, the brake pad 2 is attracted to the outer ring of the electromagnetic component 1 to generate a friction moment, the magnetic force of the magnet 4 on the brake disc 3 is smaller than the magnetic force provided by the electromagnetic component 1, and the inner surface of the electromagnetic component 1 generates friction with the brake disc 3.

[0037] In some embodiments, the brake pad 2 is a fan-shaped structure.

[0038] The working principle of the wheel brake device using electromagnetic braking provided in the above embodiment is as follows:

[0039] Based on the required braking distance of the drone, the electromagnetic force of the brake assembly 1 is controlled by adjusting the current or voltage of the brake assembly 1, thereby varying the relative friction between the electromagnet friction pad, brake pad 2, and brake disc 3, ultimately achieving the desired braking distance. Electromagnetic assembly 1 is inserted into wheel hub 6. The hollow top shaft of the first electromagnet 12 in electromagnetic assembly 1 contacts the inner ring of bearing 15 in wheel hub 6, ensuring an air gap between electromagnetic assembly 1 and brake disc 3. When the brake is not in use, magnet 1 holds brake pad 2 against the inner wall of wheel hub 6. Brake disc 3 is mounted in a six-hole slot in wheel hub 6. When the brake is not in use, magnet 4 holds brake disc 3 in place. Tire 7 is pressed into wheel hub 6, and wheel hub 6 and hub disc 9 are connected and tightened with eight screws 10 to prevent them from falling during the drone's taxiing.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A wheel brake device utilizing electromagnetic braking, characterized in that: The brake device includes a wheel hub, an electromagnetic assembly arranged in a hollow cavity of the wheel hub, and a brake mechanism arranged between the electromagnetic assembly and the inner surface of the wheel hub. The wheel hub is fixed to the tire through a wheel hub disc. The wheel hub is also provided with a bearing for supporting and adjusting the position of the electromagnetic assembly. The inner end surface of the wheel hub is provided with a brake groove that cooperates with the brake mechanism. The electromagnetic assembly includes a first electromagnet, a second electromagnet and a third electromagnet arranged in sequence from the outside to the inside, and a first friction plate is provided on the outside of the first electromagnet, the second electromagnet and the third electromagnet. The first electromagnet, the second electromagnet, the third electromagnet and the first friction plate are fixed by a guide pin, and the first electromagnet, the second electromagnet, the third electromagnet and the first friction plate are each provided with a guide hole for passing the guide pin. The braking mechanism includes a brake pad matched with the inner ring of the wheel hub, a brake disc with a clearance fit in the brake groove, and a magnetic steel fixed to the end face of the inner cavity of the wheel hub. The end face of the inner cavity of the wheel hub is provided with a magnetic steel groove for fixing the magnetic steel. During operation, the brake pad and the outer ring of the electromagnetic component are attracted to generate friction torque, the magnetic force of the magnet on the brake disc is smaller than the magnetic force provided by the electromagnetic component, and the inner surface of the electromagnetic component generates friction with the brake disc.

2. The wheel brake device using electromagnetic braking according to claim 1, characterized in that: The wheel hub further comprises a magnetic coating arranged on the inner wall of the cavity for adsorbing the braking mechanism and a bearing seat arranged at the axial center position of the hollow cavity.

3. The wheel brake device using electromagnetic braking according to claim 1, characterized in that: The first electromagnet includes a hollow top shaft matched with the inner ring of the bearing, a guide shaft for fitting the second electromagnet and the third electromagnet, a first coil slot arranged on the guide shaft, and a first coil wound in the first coil slot.

4. The wheel brake device using electromagnetic braking according to claim 3, characterized in that: The second electromagnet includes a second coil slot whose inner ring matches the guide shaft and a second coil wound in the second coil slot.

5. The wheel brake device using electromagnetic braking according to claim 3, characterized in that: The third electromagnet includes a third coil slot whose inner ring matches the guide shaft and a third coil wound in the third coil slot. A groove for fixing the second friction plate is provided on the inner side of the third coil slot.

6. The wheel brake device using electromagnetic braking according to claim 1, characterized in that: The brake pad is a fan-shaped structure.

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