Clamp type main wheel

Abstract

The clamp type main engine wheel comprises an engine wheel assembly and a brake device, the engine wheel assembly comprises a hub, a wheel flange, a half clamping ring, an air valve, a gear disc and a brake disc, the wheel flange is arranged on the hub in a sleeving mode, the half clamping ring is used for fixing the wheel flange, the air valve is installed on the side face of the hub through threads, and the brake disc is installed on the side face of the hub through a bolt and a nut. The brake disc and the hub are coaxially arranged, the gear disc is installed on the outer side of the brake disc in a threaded mode, the brake device comprises a cylinder body, a piston, two brake pads, a connecting pipe nozzle and a screw rod, the piston is installed in the cylinder body, the brake pads are installed on the end face of the piston, the two brake pads are installed on the screw rod in a sliding mode, and the screw rod is installed on the cylinder body through threads. The brake device is installed on the undercarriage, the brake pads are located on the two sides of the brake disc, the pipe connecting nozzle is installed on the cylinder body and communicated with the piston, and due to the fact that the brake disc and the brake device are arranged outside the hub, good heat dissipation performance is achieved.

Description

[0001] The invention relates to the technical field of wheel landing gear for small unmanned aerial vehicles, and in particular to a clamp-type main engine wheel. Background Art

[0002] Small UAVs, with their unique advantages, are gradually showing strong application potential in various fields. In the landing gear system of UAVs, wheels are the main load-bearing components, which can realize functions such as taxiing, take-off and landing, braking, and supporting the aircraft. Since the aircraft will generate high temperatures when braking, and the wheels will be subjected to greater impact force when landing, the load of the wheels needs to be considered when designing them, so as to provide the aircraft with wheels with good heat dissipation, good load-bearing, and light weight. The brake discs of existing wheels are mostly set in the wheel hub, which is not conducive to heat dissipation. Summary of the invention

[0003] In order to solve the problems mentioned in the above background technology, the present invention provides a clamp type main engine wheel.

[0004] The present invention discloses the following technical scheme: a caliper-type main engine wheel, comprising a wheel assembly and a brake device, wherein the wheel assembly comprises a wheel hub, a wheel rim, a half-circlip, a valve nozzle, a gear disc and a brake disc, wherein the wheel rim is sleeved on the wheel hub, the wheel rim is fixed by a half-circlip, the valve nozzle is installed on the side of the wheel hub through a thread, the brake disc is installed on the side of the wheel hub through bolts and nuts, the brake disc is coaxially arranged with the wheel hub, the gear disc is threadedly installed on the outside of the brake disc, the brake device comprises a cylinder body, a piston, a brake pad, a pipe nozzle and a screw rod, the piston is installed in the cylinder body, the end face of the piston is installed with a brake pad, the brake pad is in two pieces and is slidably installed on the screw rod, the screw rod is threadedly installed on the cylinder body, the brake device is installed on the landing gear so that the brake pads are located on both sides of the brake disc, the pipe nozzle is installed on the cylinder body and is connected with the piston.

[0005] Furthermore, there are multiple bolts arranged along the radial direction of the hub.

[0006] Furthermore, the nut is a self-locking nut.

[0007] Furthermore, the outer circumference of the gear plate is distributed with convex teeth, with 36 teeth in number.

[0008] Beneficial effects: 1. Compared with the prior art, the brake disc and brake device of the present invention are located outside the wheel hub, which can quickly dissipate the heat generated by the friction between the brake disc and the brake pad when braking, and has good heat dissipation performance. 2. By installing a gear disc on the brake disc and arranging a wheel speed sensor corresponding to the gear of the gear disc on the landing gear, the wheel speed can be accurately collected. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the wheel assembly of the present invention; Figure 2 It is a schematic diagram of the structure of the brake device of the present invention; In the figure: 1-wheel hub, 2-wheel rim, 3-half retaining ring, 4-valve nozzle, 5-gear plate, 6-brake disc, 7-bolt, 8-nut, 9-cylinder body, 10-piston, 11-brake pad, 12-piston nozzle, 13-screw. DETAILED DESCRIPTION

[0010] like Figure 1 to Figure 2 As shown, the caliper type main engine wheel comprises a wheel assembly and a brake device, wherein the wheel assembly comprises a wheel hub 1, a wheel rim 2, a half-circlip 3, a valve nozzle 4, a gear disc 5 and a brake disc 6, wherein the wheel rim 2 is sleeved on the wheel hub 1, and the wheel rim 2 is fixed by the half-circlip 3 so that the wheel rim 2 is stably connected to the wheel hub 1, providing reliable support for the wheel, the valve nozzle 4 is threadedly mounted on the side of the wheel hub 1 for inflating the wheel, the brake disc 6 is mounted on the side of the wheel hub 1 by bolts 7 and nuts 8, the brake disc 6 is coaxially arranged with the wheel hub 1, the gear disc 5 is threadedly mounted on the outside of the brake disc 6 for collecting the rotation speed of the wheel, and the brake device comprises a cylinder 9, a piston 10, a brake pad 11, a pipe nozzle 12 and a screw Rod 13, the piston 10 is installed in the cylinder body 9, and a brake pad 11 is installed on the end face of the piston 10. There are two brake pads 11 and they are slidably installed on the screw rod 13. The screw rod 13 is installed on the cylinder body 9 through a thread. The brake device is installed on the landing gear so that the brake pads 11 are located on both sides of the brake disc 6. The connecting nozzle 12 is installed on the cylinder body 9 and is connected with the piston 10. The connecting nozzle 12 is connected to the hydraulic oil to provide hydraulic pressure to the piston 10, pushing the piston 10 so that the brake pads 11 are close to the brake disc 6 to achieve braking. The brake device and the brake disc 6 are located outside the wheel hub 1. When braking, the heat generated by friction between the brake pads 11 and the brake disc 6 can be quickly dissipated, and it has good heat dissipation performance.

[0011] There are several bolts 7 and they are arranged along the radial direction of the wheel hub 1, so that the wheel hub 1 and the brake disc 6 are stably connected to ensure the braking efficiency; the nut 8 is a self-locking nut 8, which effectively prevents the bolts 7 and the nut 8 from loosening; the outer circumference of the gear plate 5 is distributed with convex teeth, the number of teeth is 36, and the landing gear is provided with a wheel speed sensor corresponding to the convex teeth, which can accurately collect the wheel speed.

[0012] When the aircraft is taxiing on the ground, the wheels rotate and drive the brake disc 6 to rotate together, while the two brake pads 11 on the brake device are stationary. When braking is needed, hydraulic oil is input into the piston 10 cavity, so that the piston 10 moves outward, pushing the brake pads 11 to press the brake disc 6 that rotates together with the wheel, and friction is generated between the brake disc 6 and the brake pads 11 to brake the wheel. When the brake is released, the hydraulic pressure is released, the piston 10 returns to the initial position, the friction between the brake disc 6 and the brake pads 11 is released, and the brake is released. Since the brake disc 6 and the brake device are arranged outside the wheel hub 1, it is beneficial to dissipate the heat generated by the friction between the brake disc 6 and the brake pads 11, and it has good heat dissipation performance.

[0013] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A caliper type main engine wheel, comprising a wheel assembly and a brake device, characterized in that: The wheel assembly comprises a wheel hub (1), a wheel rim (2), a half-circlip (3), a valve nozzle (4), a gear plate (5) and a brake disc (6); the wheel rim (2) is sleeved on the wheel hub (1), the wheel rim (2) is fixed by the half-circlip (3), the valve nozzle (4) is installed on the side of the wheel hub (1) by means of threads, the brake disc (6) is installed on the side of the wheel hub (1) by means of bolts (7) and nuts (8), the brake disc (6) is coaxially arranged with the wheel hub (1), the gear plate (5) is installed on the outside of the brake disc (6) by means of threads, and the brake device comprises The invention comprises a cylinder body (9), a piston (10), a brake pad (11), a pipe connection nozzle (12) and a screw rod (13), wherein the piston (10) is installed in the cylinder body (9), the end surface of the piston (10) is installed with a brake pad (11), the brake pad (11) is provided in two pieces and is slidably installed on the screw rod (13), the screw rod (13) is installed on the cylinder body (9) through a thread, the brake device is installed on the landing gear so that the brake pad (11) is located on both sides of the brake disc (6), and the pipe connection nozzle (12) is installed on the cylinder body (9) and is communicated with the piston (10).

2. The clamp type main engine wheel according to claim 1, characterized in that: The bolts (7) are in multiple numbers and are arranged along the radial direction of the wheel hub (1).

3. The clamp type main engine wheel according to claim 1, characterized in that: The nut (8) is a self-locking nut (8).

4. The clamp type main engine wheel according to claim 1, characterized in that: The gear plate (5) has convex teeth distributed on the outer circumference, with the number of teeth being 36.

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