Gear box and unmanned helicopter

Abstract

The present invention discloses a gearbox, including a back plate and a packaging part, wherein the back plate is provided with a mounting hole for mounting a transmission gear shaft, the packaging part has an opening matching the back plate, the back plate and the packaging part can be enclosed to form a mounting cavity for mounting a transmission gear, and the back plate and the packaging part are detachably connected along the axial direction of the transmission gear shaft. The present invention also discloses an unmanned helicopter. In the gearbox of the present invention, the packaging part and the back plate for fixing the transmission gear shaft are split structures, and are detachably connected along the axial direction of the transmission gear shaft. Therefore, during the installation and maintenance of the transmission gear, the gearbox will not interfere with the actions of the operator, thereby reducing the difficulty of installing and maintaining the transmission gear, reducing the labor intensity of the operator, and improving work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical transmission, and in particular to a gear box and an unmanned helicopter. Background Art

[0002] As a component of an aircraft, unmanned helicopters have extremely high requirements on the weight, reliability and maintainability of the fuselage components; and the transmission system, as an important component of power transmission, has its reliability of top priority and requires regular inspection and maintenance.

[0003] The gear box used for encapsulating the transmission gear in the prior art is usually configured in a top-detachable form, that is, an opening is provided on the top of the gear box body to match the cover plate. For a cantilever transmission gear in which the gear transmission shaft is parallel to the ground, when the transmission gear is installed on the gear transmission shaft and when the transmission gear is inspected and repaired later, this gear box body will interfere with the operator's actions, increase the difficulty of installing the transmission gear and the difficulty of subsequent maintenance. Usually, when inspecting the transmission gear, it is necessary to detach the gear box body and the transmission gear as a whole from the transmission gear shaft, which increases the labor intensity of the operator.

[0004] Therefore, how to provide a gearbox that meets actual needs, reduces the difficulty of installation and subsequent maintenance of transmission gears, and reduces the labor intensity of operators is still a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] The purpose of the present invention is to provide a gear box that meets actual needs, reduces the difficulty of installation and subsequent maintenance of transmission gears, and reduces the labor intensity of operators.

[0006] In order to solve the above technical problems, the present invention provides a gear box, including a back plate and a packaging part, the back plate is provided with a mounting hole for installing a transmission gear shaft, the packaging part has an opening matching the back plate, the back plate and the packaging part enclose a mounting cavity for installing a transmission gear, and the back plate and the packaging part are detachably connected along the axial direction of the transmission gear shaft.

[0007] In the gear box of the present invention, the packaging part and the back plate for fixing the transmission gear shaft are split structures and can be detachably connected along the axial direction of the transmission gear shaft. During the installation process, the back plate can be first fixedly connected to the body, and the transmission gear shaft can be inserted into the corresponding mounting hole, and then the transmission gear can be installed on the corresponding transmission gear shaft, and finally the packaging part can be fixed to the back plate to encapsulate the transmission gear in the mounting cavity to protect the transmission gear; at the same time, during the inspection and maintenance of the transmission gear, only the packaging part can be removed. At this time, the transmission gear will be completely exposed in an open environment, which is convenient for the operator to perform related maintenance operations.

[0008] Therefore, during the installation and maintenance process of the transmission gear of the gearbox of the present invention, the transmission gear is in an open environment, and the gearbox will not interfere with the operator's actions, thereby reducing the difficulty of installation and subsequent maintenance of the transmission gear; at the same time, during maintenance, there is no need to separate the gearbox as a whole from the transmission gear shaft, only the packaging part needs to be removed, thereby reducing the labor intensity of the operator and improving work efficiency.

[0009] Optionally, the back plate is provided with three mounting holes along the length direction, the three mounting holes have a predetermined distance along the length direction, the mounting hole located in the middle is used to install the driving gear shaft, and the two mounting holes located on both sides are used to install the driven gear shaft.

[0010] Optionally, the packaging portion is provided with an inwardly folded edge at an open end connected to the back plate, at least one of the folded edge and the back plate is provided with a first seal, and the folded edge and the back plate are sealed and connected via the first seal.

[0011] Optionally, the folded edge and / or the back plate is further provided with a first groove at a connection position, and the first sealing member is installed inside the first groove.

[0012] Optionally, the packaging part comprises an upper packaging part and a lower packaging part, and the upper packaging part and the lower packaging part are sealed and connected in a detachable manner.

[0013] Optionally, the upper packaging part and the lower packaging part are respectively provided with a first connection part and a second connection part folded outward at the connection position, at least one of the first connection part and the second connection part is also provided with a second sealing member, and the first connection part and the second connection part are sealed and connected via the second sealing member.

[0014] Optionally, the first connecting portion and / or the second connecting portion is further provided with a second groove, and the second sealing member is installed inside the second groove.

[0015] Optionally, the gearbox is made by photo-stereolithography technology.

[0016] Optionally, the gear box is provided with an anti-corrosion coating at least on the inner wall of the lower packaging part.

[0017] The present invention also provides an unmanned helicopter, comprising a transmission gear and the aforementioned gear box, wherein the transmission gear is installed inside the gear box.

[0018] The unmanned helicopter of the present invention has the aforementioned gear box, and therefore has the same technical effects as the aforementioned gear box, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a specific implementation of the gearbox provided by the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the internal structure of the gearbox;

[0021] Figure 3 The first-stage transmission gear is installed on Figure 2 Schematic diagram of the structure inside the gearbox;

[0022] Figure 4 for Figure 1 A schematic diagram of the structure of the lower packaging part of the gearbox;

[0023] Figure 5 for Figure 1 A schematic diagram of the structure of the upper packaging part of the gearbox;

[0024] in, Figures 1 to 5 The reference numerals are described as follows:

[0025] 1-back plate; A / B-mounting hole; 2-packaging part; 21-upper packaging part; 211-first connecting part; 22-lower packaging part; 221-second connecting part; 2a-folded edge; 3-first sealing member; 4-second sealing member. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] The words "first", "second", etc. mentioned in this article are only for the convenience of describing two or more structures or components with the same or similar structures and / or functions, and do not imply any special limitation on the order and / or importance.

[0028] Herein, the direction extending toward the inside of the gear box is referred to as “inside”, and the direction extending toward the outside of the gear box is referred to as “outside”.

[0029] Please refer to Figure 1 , Figure 1 The figure is a schematic structural diagram of a specific implementation mode of the gearbox provided by the present invention.

[0030] The present invention provides a gear box, including a back plate 1 and a packaging part 2, the back plate 1 is provided with a mounting hole for mounting a transmission gear shaft, the packaging part 2 has an opening matching the back plate 1, the back plate 1 and the packaging part 2 are enclosed to form a mounting cavity for mounting a transmission gear, and the back plate 1 and the packaging part 2 are detachably connected along the axial direction of the transmission gear shaft.

[0031] In the gear box of the present invention, the packaging part 2 and the back plate 1 for fixing the transmission gear shaft are split structures and can be detachably connected along the axial direction of the transmission gear shaft. During the installation process, the back plate 1 can be first fixedly connected to the body, and the transmission gear shaft can be inserted into the corresponding mounting hole, and then the transmission gear can be installed on the corresponding transmission gear shaft, and finally the packaging part 2 can be fixed to the back plate 1 to encapsulate the transmission gear in the mounting cavity to protect the transmission gear; in addition, during the inspection and maintenance of the transmission gear, only the packaging part 2 can be removed. At this time, the transmission gear will be completely exposed to the open environment, which is convenient for the operator to perform related maintenance operations.

[0032] Therefore, during the installation and maintenance process of the transmission gear of the gearbox of the present invention, the transmission gear is in an open environment, and the gearbox will not interfere with the operator's actions, thereby reducing the difficulty of installation and subsequent maintenance of the transmission gear; at the same time, during maintenance, there is no need to disassemble the gearbox as a whole from the transmission gear shaft, only the packaging part 2 needs to be disassembled, thereby reducing the labor intensity of the operator and improving work efficiency.

[0033] In addition, the back plate 1 and the packaging part 2 are fixedly connected in a detachable manner. In actual applications, bolt connection, clamping connection and the like can be adopted, and no strict limitation is imposed here.

[0034] Please continue to refer to Figure 2 , Figure 2 for Figure 1 Schematic diagram of the internal structure of the gearbox.

[0035] In the present invention, the back plate 1 is sequentially provided with three mounting holes along the length direction, and the three mounting holes have a predetermined distance along the length direction. The mounting hole A in the middle is used to install the driving gear shaft, and the two mounting holes B on both sides are used to install the driven gear shaft.

[0036] The gearbox of the present invention is suitable for a cross-twin-rotor unmanned helicopter, wherein a driving gear is installed on a driving gear shaft in the middle, and driven gears are installed on driven gear shafts on both sides. The driving gear can mesh with two driven gears on both sides at the same time to drive the two driven gears, and then transmit power to the two rotors through the secondary transmission gear.

[0037] Of course, the gearbox of the present invention can be used not only for twin-rotor unmanned helicopters, but also for any transmission gear that is a cantilever transmission gear.

[0038] Please continue to refer to Figure 2 In this embodiment, the packaging part 2 is provided with an inwardly folded folded edge 2a at the open end connected to the back plate 1, and at least one of the folded edge 2a and the back plate 1 is provided with a first seal 3 at the connection position, and the folded edge 2a and the back plate 1 are sealed and connected by the first seal 3.

[0039] During operation, an appropriate amount of lubricating oil needs to be injected into the bottom of the gear box and the two driven gear parts are immersed in the lubricating oil so that the lubricating oil can be brought to the meshing parts for lubrication during rotation. Therefore, the packaging part 2 is provided with a folded edge 2a and is sealed and connected to the back plate 1 through a first seal 3, which can prevent oil leakage and ensure that the transmission gear can be well lubricated.

[0040] Furthermore, in this embodiment, the back plate 1 is further provided with a first groove at the connection portion, and the first sealing member 3 is installed inside the first groove.

[0041] In this embodiment, the first sealing member 3 is installed on the back plate 1. In practical applications, the first sealing member 3 can be installed on the folded edge 2a, or installed on the back plate 1 and the folded edge 2a at the same time, which are all feasible solutions as long as the leak-proof effect can be guaranteed.

[0042] Please refer to Figure 4 and Figure 5 , Figure 4 for Figure 1 A schematic diagram of the structure of the lower packaging part of the gearbox; Figure 5 for Figure 1 Schematic diagram of the structure of the upper packaging part of the gearbox.

[0043] In the gearbox of the present invention, the packaging part 2 comprises an upper packaging part 21 and a lower packaging part 22, and the upper packaging part 21 and the lower packaging part 22 are sealed and connected in a detachable manner.

[0044] In actual applications, if the packaging part 2 is an integrated structure, during the installation process, the packaging part 2 can only gradually approach the back plate 1 along the axial direction of the transmission gear shaft and be fixedly connected to the back plate 1. In order to ensure that the packaging part 2 does not interfere with the transmission gear during the installation process, the inner cavity of the packaging part 2 needs to be larger than the volume of the transmission gear, and the weight will also increase accordingly; at the same time, when lubricating the transmission gear, it is necessary to inject lubricating oil into the box body after the installation is completed. Not only is the operation complicated, but in order to ensure that the transmission gear can be immersed in the lubricating oil, a large volume of lubricating oil needs to be injected, which further increases the weight of the box body; however, in this embodiment, the packaging part 2 is set to a split structure, and during the installation process, The lower packaging part 22 is installed first, and the lower packaging part 22 can be fitted with the back plate 1 first, and moved vertically upward along the back plate 1 to the installation position; after the lower packaging part 22 is installed, the upper packaging part 21 is installed. Similarly, the upper packaging part 21 is first fitted with the back plate 1, and moved vertically downward along the back plate 1 to the theoretical position. With this installation method, the inner cavity of the packaging part 2 can be set to be equivalent to the installation volume of the transmission gear, and the weight of the packaging part 2 will also be reduced accordingly; in addition, when lubricating the transmission gear, the lubricating oil can be first loaded into the accommodating cavity at the bottom of the lower packaging part 22, and then the lower packaging part 22 is installed, and the volume of the lubricating oil that needs to be injected is also very small. Therefore, it is a better solution for this embodiment to set the packaging part 2 as a split structure.

[0045] The upper packaging part 21 and the lower packaging part 22 are sealed and connected in a detachable manner, and specifically can be connected by bolt connection, clamping connection, etc., which is not strictly limited here.

[0046] Furthermore, in this embodiment, the upper packaging part 21 and the lower packaging part 22 are respectively provided with a first connection part 211 and a second connection part 221 folded outward at the connection position, and at least one of the first connection part 211 and the second connection part 221 is also provided with a second sealing member 4, and the first connection part 211 and the second connection part 221 are sealed and connected by the second sealing member 4.

[0047] This arrangement can improve the stability of the connection between the upper packaging part 21 and the lower packaging part 22, prevent oil leakage, and ensure that the transmission gear can be well lubricated.

[0048] In addition, the first connection part 211 and / or the second connection part 221 is further provided with a second groove, and the second sealing member 4 is installed inside the second groove. The second groove is provided to fix the second sealing member 4, thereby further improving the sealing effect.

[0049] In this embodiment, the first sealing member 3 and the second sealing member 4 are both sealing rubber pads.

[0050] Furthermore, in this embodiment, the gear box is made by photo-stereolithography technology.

[0051] Unmanned helicopters in the prior art usually adopt a two-stage transmission system. For the purpose of lightweight requirements, the secondary transmission gears are sealed and packaged through a gear box, but the primary transmission gears are often exposed in an open environment, which causes the gears to easily absorb dust and generate serious heat, increasing the possibility of accidents. Therefore, the gear box of the present invention is made through 3D printing light-curing molding technology and uses materials such as nylon or PLA to greatly reduce the weight of the gear box. Under the premise of having good sealing properties, the lightweight requirements are met. The primary transmission gear can also be packaged with the gear box of the present invention to protect the primary transmission gear, thereby reducing the possibility of accidents and improving the safety performance of the unmanned helicopter.

[0052] In addition, the gearbox of this embodiment is provided with an anti-corrosion coating at least on the inner wall of the lower packaging portion 22 to prevent the lubricating oil from corroding and penetrating the gearbox wall.

[0053] Specifically, the anti-corrosion coating may be an epoxy resin coating, a phenolic epoxy coating, etc., and is not limited here as long as it can play an anti-corrosion role.

[0054] The present invention also provides an unmanned helicopter, comprising a transmission gear and the aforementioned gear box, wherein the transmission gear is installed inside the gear box.

[0055] The unmanned helicopter of the present invention includes the aforementioned gear box, and thus has the same technical effects as the aforementioned gear box, which will not be described in detail herein.

[0056] The above is a detailed introduction to a gearbox and an unmanned helicopter provided by the present invention. The principle and implementation method of the present invention are described in detail using specific examples. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, the present invention can also be improved and modified without departing from the principle of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A gear box, characterized in that: The invention comprises a back plate (1) and a packaging part (2), wherein the back plate (1) is provided with mounting holes (A, B) for mounting a transmission gear shaft, the packaging part (2) has an opening matching the back plate (1), the back plate (1) and the packaging part (2) together form a mounting cavity for mounting a transmission gear, and the back plate (1) and the packaging part (2) are detachably connected along the axial direction of the transmission gear shaft; The packaging part (2) comprises an upper packaging part (21) and a lower packaging part (22), and the upper packaging part (21) and the lower packaging part (22) are sealed and connected in a detachable manner; The packaging portion (2) is provided with an inwardly folded edge (2a) at the open end connected to the back plate (1), and at least one of the folded edge (2a) and the back plate (1) is provided with a first sealing member (3), and the folded edge (2a) and the back plate (1) are sealed and connected via the first sealing member (3); The back plate (1) is provided with three mounting holes (A, B) along the length direction, the three mounting holes (A, B) have a predetermined distance along the length direction, the mounting hole (A) located in the middle is used to mount the driving gear shaft, and the two mounting holes (B) located on both sides are used to mount the driven gear shaft; The folded edge (2a) and / or the back plate (1) are also provided with a first groove at the connection position, and the first sealing member (3) is installed inside the first groove; The upper packaging part (21) and the lower packaging part (22) are respectively provided with a first connecting part (211) and a second connecting part (221) folded outward at the connecting parts, and at least one of the first connecting part (211) and the second connecting part (221) is also provided with a second sealing member (4), and the first connecting part (211) and the second connecting part (221) are sealed and connected via the second sealing member (4); The first connecting portion (211) and / or the second connecting portion (221) is also provided with a second groove, and the second sealing member (4) is installed inside the second groove.

2. The gearbox according to claim 1, characterized in that: The gear box is made by photo-curing technology.

3. The gearbox according to claim 2, characterized in that: The gear box is provided with an anti-corrosion coating at least on the inner wall of the lower packaging part (22).

4. An unmanned helicopter, characterized in that: It comprises a transmission gear and the gear box according to any one of claims 1 to 3, wherein the transmission gear is installed inside the gear box.

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