A coaxial twin propeller motor mount

Abstract

This utility model discloses a coaxial twin-propeller motor mount, including a motor mount body; the motor mount body is symmetrically equipped with end covers on its upper and lower sides, each end cover being connected to a motor; side ESC brackets are installed on both sides of the motor mount body, each side ESC bracket being connected to an ESC mounting plate, and an ESC is mounted on the ESC mounting plate; a front ESC bracket is installed on the front side of the motor mount body. This utility model allows the motor to be installed coaxially, and when installed on the motor mount, it is symmetrical, making installation simple and debugging convenient; at the same time, it effectively utilizes the airflow disturbance between the upper and lower propeller blades during flight, allowing the propeller airflow to directly blow on the ESC, accelerating the ESC's heat dissipation.

Description

Technical Field

[0001] This utility model belongs to the field of unmanned aerial vehicle (UAV) technology, and in particular relates to a coaxial dual propeller motor mount. Background Technology

[0002] With the development of drone technology, heavy-payload rotary-wing drones are placing higher demands on aircraft power. Traditional single-axis motor layouts lead to excessive loads on individual motors, causing them to operate at high power for extended periods. This makes it difficult to control motor power consumption, temperature, vibration, and noise, potentially causing irreversible damage and reducing aircraft safety. Coaxial dual-propeller motor mounts achieve coaxial drive through two independently controlled upper and lower motors, effectively reducing the load on individual motors and providing more powerful performance. However, existing coaxial dual-propeller motor mounts are mostly integrated designs, which are costly to manufacture, inconvenient to install, and hinder structural maintenance, thus impeding the development of heavy-payload drone technology. Utility Model Content

[0003] The purpose of this invention is to solve the problems mentioned in the background art and to propose a simple coaxial dual propeller motor mount structure, which is easy to install and convenient to debug. Moreover, this design effectively utilizes the airflow disturbance between the upper and lower propeller blades during flight for ESC heat dissipation.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a coaxial twin-propeller motor mount, comprising a motor mount body; end covers symmetrically mounted on the upper and lower sides of the motor mount body, each end cover being connected to a motor; side ESC brackets mounted on both sides of the motor mount body, each side ESC bracket being connected to an ESC mounting plate, and an ESC being mounted on the ESC mounting plate; a front ESC bracket mounted on the front side of the motor mount body.

[0005] Furthermore, the motor base body is provided with annular protrusions on the top and bottom, and several first threaded holes are distributed on the annular protrusions, which are fitted with the end cover for installation.

[0006] Furthermore, the end cover has threaded holes that correspond to the threaded holes of the motor, and the motor is mounted on the end cover.

[0007] Furthermore, there is an end cap-shaped protrusion at the front of the motor base body, and several second threaded holes are evenly distributed on the end cap-shaped protrusion; the center of the front ESC bracket is a ring, which adopts a hollow weight reduction design, and the four sides have brackets protruding. The center of the front ESC bracket has several threaded holes that are distributed in the same way as the second threaded holes and cooperate with each other.

[0008] Furthermore, the two sides of the motor base body are flat, with several third threaded holes drilled on them; the side ESC bracket is a cuboid bracket with a hollowed-out weight-reduction design in the middle, which has good load-bearing capacity. The side ESC bracket has several threaded through holes corresponding to the third threaded holes at the top and bottom. The ESC mounting plate is installed on the left and right sides of the motor base body through the threaded through holes and the third threaded holes.

[0009] Furthermore, threaded holes are provided on both sides of the front ESC bracket; the ESC mounting plate is made of lightweight material, such as composite materials, carbon fiber, or similar materials, with a hollow design in the middle and threaded holes, so that the ESC mounting plate can be installed in conjunction with the threaded through holes of the side ESC bracket and the threaded holes on both sides of the front ESC bracket; the ESC mounting plate is provided with ESC mounting threaded holes around its perimeter according to the threaded hole positions of the ESC.

[0010] Furthermore, the rear side of the motor base body is a tubular structure with several annular reinforcing ribs on the outer ring of the tubular structure; the tubular structure has multiple protruding threaded holes arranged laterally; a groove is cut inward along the axial direction of the tubular structure to leave a certain amount of tolerance space when installing with the machine arm; apart from the groove, the motor base body has a symmetrical structure both vertically and horizontally.

[0011] Furthermore, several reinforcing ribs are provided at the upper and lower through holes of the motor base body to provide structural support and reinforcement.

[0012] Furthermore, aircraft propellers and other components can be mounted on the motor.

[0013] Compared with the prior art, the beneficial effects of this utility model are: it enables the motor to be installed in a coaxial manner, and when installed on the motor base, it is symmetrical from top to bottom; at the same time, the external ESC can be installed symmetrically, and the propeller air duct blows directly on the ESC, accelerating the heat dissipation of the ESC.

[0014] To more clearly illustrate the functional characteristics and structural parameters of this utility model, the following description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0016] Figure 1 This is a general structural drawing of a coaxial twin-propeller motor mount;

[0017] Figure 2 An exploded view of a coaxial twin-propeller motor mount structure;

[0018] Figure 3 This is a structural diagram of a coaxial twin-propeller motor mount.

[0019] The attached figures are labeled as follows: 1. Motor base body; 2. End cover; 3. ESC mounting plate; 4. Side ESC bracket; 5. Front ESC bracket; 6. Motor; 7. ESC; 100. Circular protrusion; 101. First threaded hole; 102. End cover protrusion; 103. Second threaded hole; 104. Third threaded hole; 105. Groove; 106. Threaded hole position; 107. Circular reinforcing rib; 108. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1 As shown, a coaxial twin-propeller motor mount is specifically implemented as follows: it includes a motor mount body 1; the motor mount body 1 is symmetrically equipped with end covers 2 on the top and bottom, and each end cover 2 is connected to a motor 6; side ESC brackets 4 are installed on both sides of the motor mount body 1, each side ESC bracket 4 is connected to an ESC mounting plate 3, and an ESC 7 is installed on the ESC mounting plate 3; a front ESC bracket 5 is installed on the front side of the motor mount body 1.

[0022] like Figure 2 , Figure 3As shown, the motor base body 1 has annular protrusions 100 on its upper and lower parts. Several first threaded holes 101 are distributed on the annular protrusions 100, which are fitted with the end cover 2. The end cover 2 has threaded holes surrounding it, corresponding to the threaded holes of the motor 6, and the motor 6 is mounted on the end cover 2. At the front of the motor base body 1 is an end cover-shaped protrusion 102, on which several second threaded holes 103 are evenly distributed. The front ESC bracket 5 has a central annular shape with a hollowed-out weight-reduction design and supports protruding on all four sides. The center of the front ESC bracket 5 has several threaded holes that are distributed in the same way as the second threaded holes 103 and cooperate with each other. The motor base body 1 has flat sides with several third threaded holes 104 drilled on them. The side ESC bracket 4 is a cuboid bracket with a hollowed-out design in the middle for weight reduction. The side ESC bracket 4 has several threaded through holes corresponding to the third threaded holes 104 drilled on its top and bottom. The ESC mounting plate 3 is installed on the left and right sides of the motor base body 1 through the threaded through holes and the third threaded holes 104. The front ESC bracket 5 has threaded holes on both sides. The ESC mounting plate 3 is made of lightweight material with a hollowed-out design in the middle and threaded holes. The ESC mounting plate 3 can be installed by mating with the threaded through holes of the side ESC bracket 4 and the threaded holes on both sides of the front ESC bracket 5. The ESC mounting plate 3 has ESC mounting threaded holes around its perimeter according to the threaded hole positions of the ESC 7. The rear side of the motor base body 1 is a tubular structure with several annular reinforcing ribs 107 around its outer ring. Multiple protruding threaded holes 106 are provided laterally on the tubular structure. A groove 105 is cut inward along the axial direction of the tubular structure. Excluding the groove 105, the motor base body 1 has a symmetrical structure both vertically and horizontally. Several reinforcing ribs 108 are provided at the vertical through holes of the motor base body 1.

[0023] Example

[0024] Specifically, in one embodiment, the end cap 2 of a coaxial twin-propeller motor mount has six M3 threaded holes evenly distributed 100mm from the center of a circle, with each threaded hole forming a 60° angle with the line connecting it to the center. The end cap 2 has an outer diameter of 120mm and an inner diameter of 98mm at the point where it mates with the motor mount body 1. The lower side of the motor 6 also has six M3 threaded holes evenly distributed 100mm from the center of a circle, with each threaded hole forming a 60° angle with the line connecting it to the center. Six M8 screws are used to align the motor 6 with the center of the end cap 2 and secure it. The lower side of the end cap 2 has 12 M3 threaded holes evenly distributed laterally; the first threaded hole 101 consists of 12 M3 threaded holes evenly distributed around the motor mount body 1 with annular protrusions 100 on the top and bottom. In use, the end cover 2 with the motor 6 installed is locked to the annular protrusion 100 by using 12 M3 screws on the top and bottom, thus fixing the end cover 2 with the motor 6 installed to the motor base body 1.

[0025] Specifically, in one embodiment, the side ESC bracket 4 is a cuboid bracket with a hollowed-out design in the middle for weight reduction, similar to an arched bridge, achieving good load-bearing capacity. The side ESC bracket 4 has two symmetrically arranged 3.2mm threaded through holes on its top and bottom, spaced 100mm apart, and its thickness is 20mm in the left and right directions. The motor base body 1 has symmetrically cut planes on its left and right sides, with the distance from the plane to the axis of symmetry being 130mm. Two M3 threaded holes, i.e., the third threaded hole 104, are symmetrically arranged on the plane, with a spacing of 100mm, consistent with the spacing of the threaded holes in the side ESC bracket 4. This allows for alignment between the side ESC bracket 4 and the motor base body 1.

[0026] Specifically, in one embodiment, the motor mount body 1 has an end cap-shaped protrusion 102 at the front, with a thickness of 10mm, an inner diameter of 95mm, and an outer diameter of 120mm. Four second threaded holes 103, each M3 in size, are evenly distributed around the protrusion, and the distance between the second threaded holes 103 and the center of the protrusion is 50mm. The front ESC bracket 5 has a symmetrical structure with a central ring, featuring a hollowed-out weight-reduction design. It has an inner diameter of 90mm, an outer diameter of 128mm, and four protruding supports on its four sides, with the furthest distance between the left and right sides of the supports being 170mm. M3 threaded holes are drilled laterally on the supports. Along the direction perpendicular to the ring plane, four M3 threaded holes are evenly distributed circumferentially, with the distance between the threaded holes and the center of the ring being 50mm. In use, the front ESC bracket 5 is installed on the front side of the motor mount body 1 by screw locking with four M6 screws. At this point, the side ESC bracket 4 is aligned with the motor mount body 1, and the furthest lateral plane of the front ESC bracket 5 is on the same plane as the furthest lateral plane of the side ESC bracket 4. The distance between the lateral threaded hole of the front ESC bracket 5 and the lateral threaded hole of the side ESC bracket 4 is 115mm.

[0027] Specifically, in one embodiment, the ESC mounting plate 3 is a rectangular T300 carbon fiber composite material plate with dimensions of 210mm × 120mm and a thickness of 4mm. It has two symmetrically perforated 80mm × 20mm holes in the center and four M3 threaded holes around its perimeter, with a vertical spacing of 100mm and a horizontal spacing of 115mm. These holes can mate with the threaded through holes of the side ESC bracket 4 and the threaded holes of the front ESC bracket 5. Additionally, the ESC mounting plate 3 has M4 threaded holes with a horizontal spacing of 190mm and a vertical spacing of 70mm around its perimeter. In use, the ESC mounting plate 3 is mounted on the plane formed by the sides of the front ESC bracket 5 and the side ESC bracket 4 using M3 bolts, thus fixing the ESC mounting plate 3, the sides of the front ESC bracket 5 and the side ESC bracket 4 to the motor base body 1. The ESC 7 also has M4 threaded holes with a horizontal spacing of 190mm and a vertical spacing of 70mm. The ESC 7 can be installed on the M4 threaded hole of the front ESC bracket 5 using M4 bolts.

[0028] Specifically, in one embodiment, the rear side of the motor base body 1 is a tubular structure with a length of 175mm, an inner diameter of 110mm, and an outer diameter of 120mm. The outer ring has three annular reinforcing ribs 107, each 2mm thick and 22mm wide. The first annular reinforcing rib 107 is located at the end of the tubular structure, the second annular reinforcing rib 107 is 80mm away from the first, and the third annular reinforcing rib 107 is 165mm away from the first, partially overlapping with the motor base body 1. Furthermore, the tubular structure has transverse reinforcing ribs with a thickness of 7mm. Each reinforcing rib has a raised threaded hole 106 every 80mm, with an M4 threaded hole. The protruding arc-shaped outer diameter is 24mm. A groove 105 is cut inward along the axis of the tubular structure, with a thickness of 2mm and a depth of 210mm, to provide room for fitting when installed with the aircraft arm.

[0029] Specifically, in one embodiment, the vertical dimension of the motor base body 1 is 256mm, the inner diameter of the upper and lower through holes is 119.5mm, and the outer diameter is 130mm. There are 6 reinforcing ribs 108 with a thickness of 3mm in the through holes, which serve as structural support and reinforcement.

[0030] After installation, insert the motor mount body 1 along the aircraft arm (outer diameter 110mm, inner diameter 100mm). Due to the presence of the groove 105, the aircraft arm can be smoothly inserted into the motor mount body 1 until the end cap-shaped protrusion 102. Then, use M4 bolts to tighten the threaded holes 106 to fix the aircraft arm to the motor mount body. The cables during installation run through the aircraft arm to the aircraft fuselage. Next, install the aircraft rotor hub, propeller, and other components on the motor 6. The installation is now complete. During operation, the propeller rotates, and the airflow directly blows onto the ESC 7, achieving heat dissipation for the ESC 7 during operation.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coaxial twin-propeller motor mount, characterized in that, The motor base body (1) includes a motor base body (1) with end caps (2) symmetrically mounted on the upper and lower sides, and a motor (6) is connected to each end cap (2); a side ESC bracket (4) is installed on both sides of the motor base body (1), and an ESC mounting plate (3) is connected to each side ESC bracket (4), and an ESC (7) is installed on the ESC mounting plate (3); a front ESC bracket (5) is installed on the front side of the motor base body (1).

2. The coaxial twin-propeller motor mount according to claim 1, characterized in that, The motor base body (1) is provided with annular protrusions (100) on the top and bottom. Several first threaded holes (101) are distributed on the annular protrusions (100). The first threaded holes (101) are fitted with the end cap (2).

3. A coaxial twin-propeller motor mount according to claim 2, characterized in that, The end cap (2) is provided with threaded holes around it, which correspond to the threaded holes of the motor (6), and the motor (6) is mounted on the end cap (2).

4. A coaxial twin-propeller motor mount according to claim 1, characterized in that, The motor base body (1) has an end cap-shaped protrusion (102) at the front, and several second threaded holes (103) are evenly distributed on the end cap-shaped protrusion (102); the front ESC bracket (5) has a circular ring at the center, adopts a hollow weight reduction design, and has brackets protruding on all four sides. The front ESC bracket (5) has several threaded holes at the center that are distributed in the same way as the second threaded holes (103) and cooperate with each other.

5. A coaxial twin-propeller motor mount according to claim 4, characterized in that, The motor base body (1) has two flat sides with several third threaded holes (104) drilled on it; the side ESC bracket (4) is a cuboid bracket with a hollowed-out weight reduction design in the middle; the side ESC bracket (4) has several threaded through holes corresponding to the third threaded holes (104) drilled on its top and bottom; the ESC mounting plate (3) is installed on the left and right sides of the motor base body (1) through the threaded through holes and the third threaded holes (104).

6. A coaxial twin-propeller motor mount according to claim 5, characterized in that, The front ESC bracket (5) has threaded holes on both sides; the ESC mounting plate (3) is a lightweight material plate with a hollow design in the middle and threaded holes. The ESC mounting plate (3) can be installed in conjunction with the threaded through holes of the side ESC bracket (4) and the threaded holes on both sides of the front ESC bracket (5); the ESC mounting plate (3) has ESC mounting threaded holes around its perimeter according to the threaded hole positions of the ESC (7).

7. A coaxial twin-propeller motor mount according to claim 1, characterized in that, The rear side of the motor base body (1) is a tubular structure with several annular reinforcing ribs (107) on the outer ring of the tubular structure; the tubular structure is provided with multiple protruding threaded holes (106) in the transverse direction; a groove (105) is cut inward along the axial direction of the tubular structure; except for the groove (105), the motor base body (1) is a symmetrical structure in the upper and lower and left and right.

8. A coaxial twin-propeller motor mount according to claim 1, characterized in that, Several reinforcing ribs (108) are provided at the upper and lower through holes of the motor base body (1).

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