Abrasion-proof propeller shaft for aircraft

Abstract

The utility model relates to the technical field of aircraft propeller shafts, in particular to an anti-abrasion propeller shaft for an aircraft, which comprises a shaft body, one end of the shaft body is fixedly sleeved with a mounting seat, the inner wall of the mounting seat is provided with a fixing groove, the upper end face of the mounting seat is fixedly connected with a threaded column, and four end feet outside the mounting seat are fixedly connected with fixing insertion rods. The shaft body is sleeved with a mounting sleeve, the left side and the right side of the mounting sleeve are fixedly connected with paddles, the inner wall of the mounting sleeve is provided with an inner threaded groove in meshed connection with the threaded column, one end of the inner wall of the mounting sleeve is fixedly connected with a rubber clamping block clamped into the fixing groove, and four end feet of the lower end face of the mounting sleeve are provided with inserting grooves. The four fixing inserting rods are inserted into the four inserting grooves, an oil seal is arranged at one end of the shaft body, and a sealing groove is formed in the oil seal. By means of the structure that the paddles are convenient to disassemble and assemble, the follow-up working efficiency is improved, time and labor are saved, the sealing effect of the oil seal is enhanced, and impurities are prevented from entering gaps to cause abrasion.

Description

Technical Field

[0001] This utility model relates to the field of aircraft propeller shaft technology, and in particular to anti-wear propeller shafts for aircraft. Background Technology

[0002] A propeller shaft is a shaft installed on an aircraft propeller. Its main function is to support and drive the propeller to rotate, thereby generating lift and thrust. The design and material selection of the propeller shaft have a significant impact on the performance and stability of the aircraft. Propeller shafts are usually made of metal materials, such as aluminum alloys or stainless steel, to ensure their strength and durability. The design of the propeller shaft needs to take into account the torque it can withstand and the stability during rotation. One end of the propeller shaft is connected to a motor, and the other end is equipped with a propeller, which is driven to rotate by the motor.

[0003] The propeller shaft of an aircraft, especially the propeller shaft of a quadcopter, refers to the rotor shaft (power output shaft). A quadcopter, also known as a four-rotor aircraft, has four propellers directly connected to motors, forming a cross-shaped layout. By changing the motor speed, the force that rotates the fuselage can be obtained, thereby adjusting the attitude of the aircraft. This design enables quadcopters to hover and move freely in space, and has high flexibility and stability.

[0004] However, after prolonged use, gaps will form at the oil seals of existing propeller shafts, allowing dust and impurities to get in, causing impact and wear, which will reduce their service life. Replacing the oil seals will increase the operating costs. Furthermore, prolonged use of aircraft propeller blades will cause wear and damage, thus affecting their flight efficiency and requiring replacement. However, the existing propeller blades are not easy to install during replacement, which will affect subsequent work efficiency. Utility Model Content

[0005] In order to overcome the problems that existing propeller shaft oil seals can cause impurities to enter and wear the propeller shaft due to gaps, and that the propeller blade replacement structure is relatively complicated, thus affecting subsequent work efficiency.

[0006] The technical solution of this utility model is as follows: an anti-wear propeller shaft for aircraft, including a shaft body, a mounting base fixedly sleeved on one end of the shaft body, a fixing groove opened on the inner wall of the mounting base, a threaded column fixedly connected to the upper end face of the mounting base, and fixing rods fixedly connected to the four ends of the mounting base. A mounting sleeve is sleeved on the outside of the shaft body, and propeller blades are fixedly connected to the left and right sides of the mounting sleeve. An internal threaded groove that meshes with the threaded column is opened on the inner wall of the mounting sleeve. A rubber clip that snaps into the fixing groove is fixedly connected to one end of the inner wall of the mounting sleeve. Slots are opened on the four ends of the lower end face of the mounting sleeve, and the four fixing rods are inserted into the four slots. An oil seal is provided at one end of the shaft body. A sealing groove is opened inside the oil seal. A sealing gasket is snapped into the sealing groove. Sealing holes are opened on the left and right sides of the front and rear ends of the upper end face of the oil seal. Sealing rods that are inserted into the sealing holes are fixedly connected to the left and right sides of the front and rear ends of the lower end face of the sealing gasket.

[0007] Preferably, the mounting sleeve and the blades on the left and right sides are mounted on the outside of the shaft by the meshing motion of the internal thread groove and the threaded column on the inner wall of the mounting sleeve. At the same time, the connection between them is strengthened by inserting the fixing rod into the slot. The sealing effect of the sealing gasket and the sealing groove is strengthened to enhance the sealing at the oil seal, thereby preventing impurities from entering and preventing shaft wear.

[0008] Preferably, a drive motor is provided at one end of the shaft, and the drive motor is electrically connected to the shaft.

[0009] Preferably, a coupling is used to rotatably connect the drive motor and the shaft.

[0010] Preferably, the mounting sleeve has an internal mounting groove, through which the shaft and the mounting sleeve are connected.

[0011] Preferably, the two blades and the mounting sleeve are welded as an integrated structure.

[0012] Preferably, a dust cover is fitted over the oil seal.

[0013] Preferably, the threaded column engages with and penetrates the internal threaded groove.

[0014] The beneficial effects of this utility model are:

[0015] The aircraft uses a wear-resistant propeller shaft. By rotating the mounting sleeve, the internal thread groove on the inner wall of the mounting sleeve engages with the threaded post, and the threaded post slowly disengages from the mounting sleeve. At the same time, the fixing rod rotates in the slot, and finally the fixing rod also slowly disengages from the slot, completing the disassembly. By rotating the mounting sleeve, it is fitted onto the outside of the shaft body, and at the same time, it engages with the threaded post and slowly moves downward to complete the installation. Meanwhile, the fixing rod is slowly inserted into the slot to strengthen the fixation.

[0016] The aircraft uses a wear-resistant propeller shaft. A sealing gasket is inserted into the sealing groove inside the oil seal to enhance the sealing effect of the oil seal. At the same time, the sealing rod on the lower end of the sealing gasket is inserted into the sealing hole to prevent gaps from appearing and causing wear to the shaft during rotation. Attached Figure Description

[0017] Figure 1 The diagram shown is a three-dimensional structural schematic of the propeller shaft of this utility model.

[0018] Figure 2 This utility model is shown. Figure 1 A magnified schematic diagram of the three-dimensional structure at point A;

[0019] Figure 3 The image shown is a bottom view of the three-dimensional structure of the propeller shaft of this utility model;

[0020] Figure 4 This utility model is shown. Figure 3 A magnified schematic diagram of the three-dimensional structure at point B;

[0021] Figure 5 The image shown is a top view of the three-dimensional structure of the propeller shaft of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Drive motor; 2. Oil seal; 3. Blade; 4. Mounting sleeve; 5. Internal threaded groove; 6. Shaft; 7. Mounting base; 8. Fixed insert rod; 9. Threaded post; 10. Slot; 11. Rubber retainer; 12. Mounting groove; 13. Sealing hole; 14. Sealing groove; 15. Sealing gasket; 16. Sealing rod. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please see Figures 1-5This utility model provides an embodiment of an anti-wear propeller shaft for aircraft, comprising a shaft body 6, a mounting base 7 fixedly sleeved on one end of the shaft body 6, a fixing groove formed on the inner wall of the mounting base 7, a threaded post 9 fixedly connected to the upper end face of the mounting base 7, fixing rods 8 fixedly connected to the four ends of the mounting base 7, a mounting sleeve 4 sleeved on the outside of the shaft body 6, propeller blades 3 fixedly connected to both sides of the mounting sleeve 4, an internal threaded groove 5 formed on the inner wall of the mounting sleeve 4 that engages with the threaded post 9, and a snap-fit ​​fixing device fixedly connected to one end of the inner wall of the mounting sleeve 4. The rubber clip 11 inside the groove, the four ends of the mounting sleeve 4 are all provided with slots 10, and the four fixing rods 8 are all inserted into the four slots 10. One end of the shaft body 6 is provided with an oil seal 2, and the inside of the oil seal 2 is provided with a sealing groove 14. A sealing gasket 15 is snapped into the inside of the sealing groove 14. Sealing holes 13 are provided on the left and right sides of the front and rear ends of the upper end of the oil seal 2. Sealing rods 16 are fixedly connected to the left and right sides of the front and rear ends of the lower end of the sealing gasket 15 and are inserted into the sealing holes 13. This utility model provides a wear-resistant propeller shaft for aircraft, such as Figure 1 As shown, the device includes a drive motor 1 and a shaft 6. In this application, the structure of the drive motor 1 and the shaft 6 is a prior art solution. The applicant will not provide a detailed description of the internal structure and components of the drive motor 1 and the shaft 6 or their connection relationship. Therefore, the above structure and connection relationship are all prior art. The applicant has not made any improvements to the components inside the handle.

[0025] Please see Figures 1-4 In this embodiment, a drive motor 1 is provided at one end of the shaft 6. The drive motor 1 is electrically connected to the shaft 6. The drive motor 1 can drive the shaft 6 to rotate, thus realizing the electrical connection between them. A coupling is rotatably connected between the drive motor 1 and the shaft 6, which allows the shaft 6 to rotate. The mounting sleeve 4 has a mounting groove 12 inside. The shaft 6 and the mounting sleeve 4 are connected through the mounting groove 12, which strengthens the installation of the blade 3 and facilitates subsequent disassembly. By disassembling the blade 3, the mounting sleeve 4 is rotated, so that the internal thread groove 5 on the inner wall of the mounting sleeve 4 engages with the threaded post 9 and slowly disengages the threaded post 9 from the mounting sleeve 4. At the same time, the fixing rod 8 rotates in the slot 10. Due to the engagement of the threaded post 9, the fixing rod 8 also slowly disengages from the slot 10, completing the disassembly. During installation, the mounting sleeve 4 is rotated so that it is sleeved on the outside of the shaft 6 and engages with the threaded post 9, slowly moving downward to complete the installation. At the same time, the fixing rod 8 is slowly inserted into the slot 10 for reinforcement.

[0026] Please see Figures 3-5In this embodiment, the two blades 3 and the mounting sleeve 4 are welded together as a single structure. This integrated structure makes the blades 3 more robust and prevents them from falling off due to subsequent damage. The oil seal 2 is fitted with a dust cover to prevent dust and impurities from entering and causing damage, and to prevent wear on the shaft 6 during operation. The threaded column 9 engages with and passes through the internal threaded groove 5, strengthening the mounting structure of the blades 3. A sealing gasket 15 is inserted into the sealing groove 14 inside the oil seal 2, thereby enhancing the sealing effect of the oil seal 2. At the same time, the sealing rod 16 on the lower end face of the sealing gasket 15 is inserted into the sealing hole 13 to prevent gaps from appearing and causing wear on the shaft 6 during rotation.

[0027] During operation, the blade 3 is disassembled, and the mounting sleeve 4 is rotated so that the internal thread groove 5 on the inner wall of the mounting sleeve 4 engages with the threaded post 9, and the threaded post 9 slowly disengages from the mounting sleeve 4. At the same time, the fixing rod 8 rotates in the slot 10. Due to the engagement of the threaded post 9, the fixing rod 8 also slowly disengages from the slot 10, completing the disassembly. During installation, the mounting sleeve 4 is rotated so that it is fitted onto the outside of the shaft 6, and at the same time, it engages with the threaded post 9 and slowly moves downward to complete the installation. At the same time, the fixing rod 8 is slowly inserted into the slot 10 for reinforcement. A sealing gasket 15 is inserted into the sealing groove 14 inside the oil seal 2, thereby enhancing the sealing effect of the oil seal 2. At the same time, the sealing rod 16 on the lower end face of the sealing gasket 15 is inserted into the sealing hole 13 to prevent gaps from appearing and causing wear to the shaft 6 during rotation.

[0028] Through the above steps, by rotating the mounting sleeve 4, the internal thread groove 5 on the inner wall of the mounting sleeve 4 engages with the threaded post 9, and the threaded post 9 slowly disengages from the mounting sleeve 4. At the same time, the fixed rod 8 rotates in the slot 10, and finally the fixed rod 8 slowly disengages from the slot 10, completing the disassembly. This solves the problem that the existing propeller shaft oil seal 2 will produce gaps that allow impurities to enter and cause wear on the propeller shaft, and that the replacement structure of the propeller blade 3 is relatively complicated, affecting the efficiency of subsequent work.

Claims

1. An anti-wear propeller shaft for aircraft, comprising a shaft body (6), characterized in that: A mounting base (7) is fixedly sleeved on one end of the shaft (6). A fixing groove is provided on the inner wall of the mounting base (7). A threaded column (9) is fixedly connected to the upper end face of the mounting base (7). A fixing rod (8) is fixedly connected to the four ends of the mounting base (7). A mounting sleeve (4) is sleeved on the outside of the shaft (6). A blade (3) is fixedly connected to both the left and right sides of the mounting sleeve (4). An internal thread groove (5) is provided on the inner wall of the mounting sleeve (4) to engage with the threaded column (9). A rubber clip that fits into the fixing groove is fixedly connected to one end of the inner wall of the mounting sleeve (4). The four ends of the lower end face of the block (11) and the mounting sleeve (4) are provided with slots (10). The four fixed rods (8) are inserted into the four slots (10). One end of the shaft (6) is provided with an oil seal (2). The inside of the oil seal (2) is provided with a sealing groove (14). The inside of the sealing groove (14) is fitted with a sealing gasket (15). The left and right sides of the front and rear ends of the upper end of the oil seal (2) are provided with sealing holes (13). The left and right sides of the front and rear ends of the lower end of the sealing gasket (15) are fixedly connected with sealing rods (16) inserted into the sealing holes (13).

2. The anti-wear propeller shaft for aircraft according to claim 1, characterized in that: A drive motor (1) is provided at one end of the shaft (6), and the drive motor (1) is electrically connected to the shaft (6).

3. The anti-wear propeller shaft for aircraft according to claim 2, characterized in that: A coupling is rotatably connected between the drive unit (1) and the shaft (6).

4. The anti-wear propeller shaft for aircraft according to claim 1, characterized in that: The mounting sleeve (4) has an internal mounting groove (12), and the shaft (6) and the mounting sleeve (4) are connected through the mounting groove (12).

5. The anti-wear propeller shaft for aircraft according to claim 1, characterized in that: The two blades (3) and the mounting sleeve (4) are welded as an integrated structure.

6. The anti-wear propeller shaft for aircraft according to claim 1, characterized in that: The oil seal (2) is fitted with a dust cover.

7. The anti-wear propeller shaft for aircraft according to claim 1, characterized in that: The threaded column (9) engages with and penetrates the internal threaded groove (5).

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