Split type gear and helicopter

Abstract

The utility model provides a split type gear. The split type gear comprises a gear ring and a gear support, the gear ring comprises an annular body, gear teeth and first fixing protrusions, the gear teeth are arranged on the outer side of the annular body, and the first fixing protrusions are arranged on the inner side of the annular body; the gear support and the gear ring are arranged in a split mode, the diameter of the gear support is smaller than the inner diameter of the gear ring, and the gear support is arranged in the gear ring and fixed to the first fixing protrusion. According to the split type gear, the gear ring and the gear support are arranged in a split mode, so that the gear ring and the gear support can be made of different materials, the gear ring can be made of materials with high strength, heat resistance grade and toughness, stability is good during high-speed operation, and the service life is long; the gear support can be made of aluminum or plastic, the weight of the gear is reduced, and the cost of the gear is reduced. The utility model further provides a helicopter.

Description

Technical Field

[0001] The utility model relates to the field of helicopters, in particular to a split gear and a helicopter. Background Art

[0002] The existing helicopter is powered by an electric motor. A pinion is installed on the motor shaft of the brushless motor. The pinion is meshed with the main gear to transmit power to the main shaft, which drives the propeller to rotate. The advantage of this structure is that a smaller brushless motor can be used, and it can provide strong kinetic energy through gear reduction transmission. However, this method puts a heavy burden on the main gear. The weight of the helicopter will affect the flight performance. Metal materials are too heavy. The existing main gear uses lightweight plastic. The heat resistance and strength of the plastic main gear are poor. When in use, the brushless motor runs at high speed and generates high heat. The plastic main gear rotates at high speed in a high-heat environment, which causes severe wear and tear, a short life, and needs to be replaced frequently. Utility Model Content

[0003] In order to solve the technical problem that the poor temperature resistance and strength of the plastic main gear lead to severe wear and short life, the utility model provides a split gear and a helicopter that can use different materials for different parts according to needs.

[0004] A split gear comprises a gear ring and a gear bracket, wherein the gear ring comprises an annular body, gear teeth and a first fixed protrusion, wherein the gear teeth are arranged on the outside of the annular body, and the first fixed protrusion is arranged on the inside of the annular body; the gear bracket is arranged separately from the gear ring, the diameter of the gear bracket is smaller than the inner diameter of the gear ring, the gear bracket is arranged inside the ring of the gear ring, and is fixed to the first fixed protrusion.

[0005] Preferably, the gear ring is made of a first material, and the gear bracket is made of a second material, and the strength, heat resistance level and toughness of the first material are greater than those of the second material.

[0006] Preferably, the first material is a metal special material or a polymer special material, and the second material is aluminum or plastic.

[0007] Preferably, the first fixing protrusion and the gear bracket are fixed by bridging and / or screws.

[0008] Preferably, the first fixing protrusion is annular and is formed by extending the annular body toward the center of the gear ring.

[0009] There are a plurality of first fixing protrusions, which are formed by extending from the annular body toward the center of the gear ring and are evenly distributed on the inner side of the annular body.

[0010] The gear bracket includes a hub, spokes and a fixing portion. The hub, spokes and fixing portion are arranged in sequence along the center of the gear ring toward the annular body. The spokes connect the hub and the fixing portion, and the fixing portion is fixed to the first fixing protrusion.

[0011] The fixing portion includes a wheel rim and a second fixing protrusion which are connected to each other, and the second fixing protrusion is fixedly arranged in cooperation with the first fixing protrusion.

[0012] The first fixing protrusion and the second fixing protrusion are annular in shape, the first fixing protrusion is formed by extending the annular body toward the center of the gear ring, and has a height less than the height of the annular body, the second fixing protrusion is formed by extending the rim toward the first fixing protrusion, and has a height less than the height of the rim, along the height direction of the annular body, the annular body has a first end and a second end opposite to each other, the rim has a third end and a fourth end opposite to each other, the first fixing protrusion is arranged adjacent to the first end of the annular body, and the second fixing protrusion is arranged adjacent to the fourth end of the rim.

[0013] A helicopter comprises a motor, a motor transmission wheel, a main shaft transmission wheel, a main shaft and a propeller which are driven in sequence, wherein the main shaft transmission wheel comprises a split gear and a bearing fixing assembly, the split gear comprises a gear ring and a gear bracket, the gear ring comprises an annular body, gear teeth and a first fixing protrusion, the gear teeth are arranged on the outside of the annular body, and the first fixing protrusion is arranged on the inside of the annular body; the gear bracket is arranged separately from the gear ring, the diameter of the gear bracket is smaller than the inner diameter of the gear ring, the gear bracket is arranged in the ring of the gear ring, and is fixed to the first fixing protrusion, and the bearing fixing assembly is fixed to the gear bracket.

[0014] Compared with the prior art, the split gear provided by the utility model is provided with a split gear ring and a gear bracket, the gear ring includes an annular body, gear teeth and a first fixed protrusion, the gear teeth are arranged on the outside of the annular body, the first fixed protrusion is arranged on the inside of the annular body, the diameter of the gear bracket is smaller than the inner diameter of the gear ring, and is arranged inside the ring of the gear ring and fixed to the gear ring. By separately arranging the gear ring and the gear bracket, the gear ring and the gear bracket can be made of different materials, so that the gear ring can be made of materials with high strength, heat resistance and toughness, and has good stability and long service life when running at high speed. The gear bracket can be made of aluminum or plastic, which reduces the weight of the gear and reduces the cost of the gear.

[0015] In addition, by using the split gear ring and the gear bracket, when the split gear is working, the gear ring has greater gear tooth loss. When the gear ring teeth are damaged, only the gear ring can be replaced, which is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural schematic diagram of a helicopter provided by the utility model;

[0017] Figure 2 for Figure 1 The three-dimensional assembly diagram of the main shaft transmission wheel is shown;

[0018] Figure 3 for Figure 2 A partially exploded schematic diagram of the main shaft transmission wheel shown;

[0019] Figure 4 for Figure 2 A cross-sectional view of the main shaft drive wheel is shown. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0022] The terms "first" and "second" are used only for descriptive purposes to distinguish objects such as substances from each other, and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. For example, without departing from the scope of the embodiments of the present invention, the first XX may also be referred to as the second XX, and similarly, the second XX may also be referred to as the first XX. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0023] See also Figure 1 , is a three-dimensional structural schematic diagram of a helicopter provided by the utility model. The helicopter 100 includes a motor 1, a motor transmission wheel 2, a main shaft transmission wheel 3, a main shaft 4 and a propeller (not shown). The motor 1 provides power, and sequentially drives the motor transmission wheel 2, the main shaft transmission wheel 3, the main shaft 4 and the propeller, and the propeller rotates to achieve flight. The motor transmission wheel 2 and the main shaft transmission wheel 3 are driven by gear meshing, and the main shaft transmission wheel 3 and the main shaft 4 are driven by bearings.

[0024] See also Figure 2 and Figure 3 ,in, Figure 2 for Figure 1 The three-dimensional assembly diagram of the main shaft transmission wheel is shown in FIG. Figure 3 for Figure 2 The main shaft transmission wheel 3 includes a bearing fixing assembly 10 and a split gear 20. The bearing fixing assembly 10 is fixed to the split gear 20. The bearing fixing assembly 10 includes a bearing seat 11 and a bearing 13. The bearing 13 is assembled on the bearing seat 11.

[0025] The split gear 20 includes a gear ring 21 and a gear bracket 22 which are separately arranged. The diameter of the gear bracket 22 is smaller than the inner diameter of the gear ring 21 , and the gear bracket 22 is arranged inside the ring of the gear ring 21 and fixed to the gear ring 21 .

[0026] The gear ring 21 is made of a first material, and the gear bracket 22 is made of a second material, and the strength, heat resistance and toughness of the first material are greater than those of the second material. The first material can be a metal special material or a polymer special material, with high heat resistance, strength and toughness, and can specifically be titanium alloy, high-speed steel, nickel-based high-temperature alloy and cobalt-based high-temperature alloy, etc. The second material can be aluminum or plastic, with low density, light weight, relatively good strength and toughness, low price and easy processing.

[0027] The gear ring 21 includes an annular body 211, gear teeth 213 and a first fixing protrusion 215, wherein the gear teeth 213 are arranged on the outside of the annular body 211, and the first fixing protrusion 215 is arranged on the inside of the annular body 211. The first fixing protrusion 215 is fixed to the gear bracket 22. Those skilled in the art may choose to adopt various fixing methods in the prior art as needed, which are not specifically limited here. For example, by bridging fixation and / or screw fixation. Among them, bridging fixation refers to using a fixing member to fix the first fixing protrusion 215 and the gear bracket 22 respectively, so as to fix the first fixing protrusion 215 and the gear bracket 22 together.

[0028] It is understandable that, in some embodiments, the first fixing protrusion can be an integral structure with the annular body, with the same height as the annular body, and there is no physical dividing line.

[0029] The gear bracket 22 includes a hub 221, a spoke 223 and a fixing portion 225. The hub 221, the spoke 223 and the fixing portion 225 are sequentially arranged from the center of the gear ring 21 to the annular body 211. The spoke 223 connects the hub 221 and the fixing portion 225. The fixing portion 225 is fixed to the first fixing protrusion 215. The bearing seat 11 is mounted on the hub 221 by screws. The surface of the hub 221 facing the center of the gear ring 21 is concave-convex. The protruding portion is provided with screw holes for mounting the bearing seat 11, which can reduce the weight of the gear bracket 22.

[0030] The fixing portion 225 includes a rim 2251 and a second fixing protrusion 2253 that are connected to each other. The second fixing protrusion 2253 is matched with the first fixing protrusion 215 .

[0031] It is understandable that, in some embodiments, the second fixing protrusion can be an integral structure with the wheel rim, with the same height as the wheel rim, and there is no physical dividing line.

[0032] Please refer to Figure 4 ,for Figure 2 The cross-sectional view of the main shaft transmission wheel is shown in FIG. In this embodiment, the first fixing protrusion 215 and the second fixing protrusion 2253 are annular, the first fixing protrusion 215 is formed by the annular body 211 extending toward the center of the gear ring 21, and the second fixing protrusion 2253 is formed by the rim 2251 extending toward the first fixing protrusion 215. Along the height direction of the annular body 211, the height of the first fixing protrusion 215 is less than the height of the annular body 211, and the height of the second fixing protrusion 2253 is less than the height of the rim 2251. The annular body 211 has a first end 2111 and a second end 2113 opposite to each other, and the rim 2251 has a third end 22511 and a fourth end 22513 opposite to each other. The first fixing protrusion 215 is arranged adjacent to the first end 2111 of the annular body 211, and the second fixing protrusion 2253 is arranged adjacent to the fourth end 22513 of the rim 2251. The first fixing protrusion 215 and the second fixing protrusion 2253 are provided with corresponding screw holes and are fixed by screws.

[0033] It should be noted that the above-mentioned proximity includes both the situation of being close to and the situation of being located at. Specifically, the first fixing protrusion 215 can be provided at the end of the first end 2111 of the annular body 211, or can be provided at a certain distance from the end of the first end 2111 of the annular body 211. The second fixing protrusion 2253 can be provided at the end of the fourth end 22513 of the rim 2251, or can be provided at a certain distance from the end of the fourth end 22513 of the rim 2251.

[0034] In other embodiments, there may be multiple first fixing protrusions, which are formed by extending from the annular body toward the center of the gear ring, and there may be multiple second fixing protrusions, which are formed by extending from the rim toward the first fixing protrusion and are fixed in cooperation with the first fixing protrusion.

[0035] In other embodiments, there may be multiple first fixing protrusions, which are formed by the annular body extending toward the center of the gear ring. The second fixing protrusion is annular, which is formed by the annular body extending toward the center of the gear ring. The first fixing protrusion is fixed to the annular second fixing protrusion.

[0036] In other embodiments, the first fixing protrusion may be annular, formed by the annular body extending toward the center of the gear ring, and the second fixing protrusion may be multiple, formed by the rim extending toward the first fixing protrusion, and the second fixing protrusion is fixed to the annular first fixing protrusion.

[0037] Compared with the prior art, the split gear 20 provided by the utility model is provided with a split gear ring 21 and a gear bracket 22, wherein the gear ring 21 includes an annular body 211, gear teeth 213 and a first fixing protrusion 215, wherein the gear teeth 213 are arranged on the outside of the annular body 211, and the first fixing protrusion 215 is arranged on the inside of the annular body 211, and the diameter of the gear bracket 22 is smaller than the inner diameter of the gear ring 21, and the gear bracket 22 is arranged inside the ring of the gear ring 21 and fixed to the gear ring 21. By separately arranging the gear ring 21 and the gear bracket 22, the gear ring 21 and the gear bracket 22 can be made of different materials, so that the gear ring 21 can be made of materials with high strength, heat resistance and toughness, and has good stability and long service life during high-speed operation, and the gear bracket 22 can be made of aluminum or plastic, which reduces the weight of the gear and reduces the cost of the gear.

[0038] In addition, by using the split gear ring 21 and the gear bracket 22, when the split gear 20 is working, the gear teeth 213 of the gear ring 21 are more worn. When the gear teeth 213 of the gear ring 21 are damaged, only the gear ring 21 can be replaced, which is convenient for maintenance.

[0039] The above descriptions are only some embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the utility model specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A split gear, characterized in that: include: The gear ring comprises an annular body, gear teeth and a first fixing protrusion, wherein the gear teeth are arranged on the outside of the annular body, and the first fixing protrusion is arranged on the inside of the annular body; The gear bracket is separately provided with the gear ring, the diameter of the gear bracket is smaller than the inner diameter of the gear ring, the gear bracket is provided inside the ring of the gear ring, and is fixed to the first fixing protrusion. The gear bracket includes a hub, a spoke and a fixing part. The hub, the spoke and the fixing part are arranged in sequence along the center of the gear ring toward the annular body. The spoke connects the hub and the fixing part. The fixing part is fixed to the first fixing protrusion. The fixing portion includes a wheel rim and a second fixing protrusion connected to each other, and the second fixing protrusion is fixedly arranged in cooperation with the first fixing protrusion. The first fixing protrusion and the second fixing protrusion are annular in shape, the first fixing protrusion is formed by extending the annular body toward the center of the gear ring, and has a height less than the height of the annular body, the second fixing protrusion is formed by extending the rim toward the first fixing protrusion, and has a height less than the height of the rim, along the height direction of the annular body, the annular body has a first end and a second end opposite to each other, the rim has a third end and a fourth end opposite to each other, the first fixing protrusion is arranged adjacent to the first end of the annular body, and the second fixing protrusion is arranged adjacent to the fourth end of the rim.

2. The split gear according to claim 1, characterized in that: The gear ring is made of a first material, and the gear bracket is made of a second material. The strength, heat resistance level and toughness of the first material are greater than those of the second material.

3. The split gear according to claim 2, characterized in that: The first material is a metal special material or a polymer special material, and the second material is aluminum or plastic.

4. The split gear according to claim 1, characterized in that: The first fixing protrusion and the gear bracket are fixed by bridging and / or screws.

5. The split gear according to claim 1, characterized in that: The first fixing protrusion is annular and is formed by extending the annular body toward the center of the gear ring.

6. The split gear according to claim 1, characterized in that: There are a plurality of first fixing protrusions, which are formed by extending from the annular body toward the center of the gear ring and are evenly distributed on the inner side of the annular body.

7. A helicopter, comprising a motor, a motor transmission wheel, a main shaft transmission wheel, a main shaft and a propeller, the main shaft transmission wheel comprising a split gear and a bearing fixing assembly, characterized in that: The split gear is a split gear as described in any one of claims 1-6, and the bearing fixing assembly is fixed to the gear bracket.

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