Clamp type main wheel

Abstract

A clamp type main engine wheel comprises an engine wheel assembly and a brake device, the engine wheel assembly comprises a hub, a rim, a half clamping ring, an air valve, a gear disc and a brake disc, the rim is arranged on the hub in a sleeving mode, the half clamping ring is used for fixing the rim, 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

TECHNICAL FIELD

[0001] The utility model relates to small unmanned aerial vehicle wheel landing gear technical field, especially relates to a pair of main wheel. BACKGROUND

[0002] Small unmanned aerial vehicle gradually shows strong application potential in each field with its unique advantage, in the landing gear system of unmanned aerial vehicle, the wheel is its main bearing component, can realize the functions such as aircraft taxiing, taking off and landing, brake braking and supporting aircraft. Because aircraft can produce high temperature when braking, and the wheel will be subjected to great impact force when landing, the load of the wheel needs to be considered when designing, to provide the aircraft with the wheel of good heat dissipation, good bearing and light weight, the brake disc of the existing wheel is mostly arranged in the hub, which is not conducive to heat dissipation. SUMMARY

[0003] To solve the problems mentioned in the above background art, the utility model provides a pair of main wheel.

[0004] The utility model discloses the following technical scheme: a pair of main wheel, including wheel assembly and brake device, the wheel assembly includes hub, rim, half snap ring, gas valve, gear disc and brake disc, the rim is sleeved on the hub, uses half snap ring and fixes the rim, the gas valve is installed on the side of hub through thread, the brake disc is installed on the side of hub through bolt and nut, the brake disc is coaxial with the hub, the gear disc is installed on the outside of brake disc through thread, the brake device includes cylinder body, piston, brake pad, connecting pipe nozzle and screw rod, the piston is installed in the cylinder body, and the piston end face is installed with brake pad, the brake pad is two and is slidably installed on the screw rod, and the screw rod is installed on the cylinder body through thread, the brake device is installed on the landing gear, so that the brake pad is located on both sides of the brake disc, and the connecting pipe nozzle is installed on the cylinder body and is communicated with the piston.

[0005] Further, the bolt is several and is arranged along the radial direction of the hub.

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

[0007] Further, the outside of gear disc is circumferentially distributed with convex teeth, and the number of teeth is 36.

[0008] Beneficial effects: 1, compared with the prior art, the brake disc and brake device of the utility model are located outside the hub, and the heat generated by the friction of the brake disc and brake pad during braking can be quickly dissipated, having good heat dissipation performance. 2, by installing the gear disc on the brake disc, setting the 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 DRAWINGS

[0009] Fig. 1The utility model discloses a wheel assembly structure schematic diagram;

[0010] Fig. 2 The utility model discloses a brake device structure schematic diagram;

[0011] In the drawing: 1 - wheel hub, 2 - wheel rim, 3 - half snap ring, 4 - air valve, 5 - gear disc, 6 - brake disc, 7 - bolt, 8 - nut, 9 - cylinder body, 10 - piston, 11 - brake pad, 12 - connector valve, 13 - screw rod. Specific implementation

[0012] As Figs. 1-2 The utility model discloses a pincer formula host wheel, including wheel assembly and brake device, the wheel assembly includes wheel hub 1, wheel rim 2, half snap ring 3, air valve 4, gear disc 5 and brake disc 6, the wheel rim 2 is installed on wheel hub 1, uses half snap ring 3 and fixes wheel rim 2, makes wheel rim 2 with wheel hub 1 stable connection, provides reliable support for the wheel, the air valve 4 is installed on the side of wheel hub 1 through the thread, is used to inflate the wheel, the brake disc 6 is installed on the side of wheel hub 1 through bolt 7 and nut 8, and the brake disc 6 is coaxial with wheel hub 1, the gear disc 5 is installed on the outside of brake disc 6 through the thread, is used to gather the wheel speed, the brake device includes cylinder body 9, piston 10, brake pad 11, connector valve 12 and screw rod 13, the piston 10 is installed in cylinder body 9, and the piston 10 end face is installed with brake pad 11, the brake pad 11 is two and is slidably installed on screw rod 13, and screw rod 13 is installed on cylinder body 9 through the thread, the brake device is installed on the landing gear, makes brake pad 11 be located on both sides of brake disc 6, the connector valve 12 is installed on cylinder body 9 and is communicated with piston 10, and the connector valve 12 connects hydraulic oil and provides hydraulic pressure for piston 10, and piston 10 is pushed to make brake pad 11 close to brake disc 6 and realize the brake, and the brake device and brake disc 6 are located outside wheel hub 1, and when braking, the heat generated between brake pad 11 and brake disc 6 due to friction can be quickly dissipated, with good heat dissipation performance.

[0013] The bolt 7 is several and is arranged along the radial direction of wheel hub 1, so that wheel hub 1 is stably connected with brake disc 6, and the brake efficiency is ensured, the nut 8 is self-locking nut 8, effectively prevents bolt 7 and nut 8 loose, the gear disc 5 outside circumferential distribution has the convex tooth, and the number of teeth is 36, and the landing gear is equipped with the wheel speed sensor corresponding with the convex tooth, can accurately gather the wheel speed.

[0014] When the airplane is taxiing on the ground, the wheel rotates and drives the brake disc 6 to rotate, 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 and pushes the brake pad 11 to press the brake disc 6 rotating with the wheel, the friction between the brake disc 6 and the brake pad 11 makes the wheel brake. 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 pad 11 is released, and the brake is released. Since the brake disc 6 and the brake device are arranged outside the wheel hub 1, the heat generated by the friction between the brake disc 6 and the brake pad 11 can be dissipated, and the brake disc 6 has good heat dissipation performance.

[0015] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art, according to the technical scheme and the inventive concept of the present application, can make equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

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 disc (5) and a brake disc (6), wherein the wheel rim (2) is mounted on the wheel hub (1), the wheel rim (2) is fixed by the half-circlip (3), the valve nozzle (4) is mounted on the side of the wheel hub (1) by means of a thread, the brake disc (6) is mounted on the side of the wheel hub (1) by means of a bolt (7) and a nut (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), and the brake device comprises The invention comprises a cylinder body (9), a piston (10), a brake pad (11), a pipe nozzle (12) and a screw rod (13), wherein the piston (10) is installed in the cylinder body (9), a brake pad (11) is installed on the end face of the piston (10), two brake pads (11) are slidably installed on the screw rod (13), the screw rod (13) is installed on the cylinder body (9) through a thread, and 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), and the pipe nozzle (12) is installed on the cylinder body (9) and is communicated with the piston (10).

2. The caliper main engine wheel according to claim 1, characterized in that: There are a plurality of bolts (7) arranged along the radial direction of the hub (1).

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

4. The caliper 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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