Aerofoil mounted oar and racing boat

Abstract

The application discloses a wing type oar frame and a racing boat and belongs to the racing boat field. The wing type oar frame and the racing boat comprise a main oar frame, one end of the main oar frame is provided with a connecting frame connected with an oar blade. The upper end surface of the main oar frame is a first arc-shaped surface, and the lower end surface is a first plane; the cross section of the main oar frame is in a wing type. When advancing, the air flow speed of the first arc-shaped surface is greater than that of the first plane, and then the pressure of the upper end surface of the main oar frame is less than that of the lower end surface, and the main oar frame is subjected to an upward thrust. The pressure of the upper and lower surfaces of the main oar frame is changed, the main oar frame is subjected to an upward thrust during the advancing process, and then the whole racing boat is subjected to an upward thrust, the resistance of the racing boat during the advancing process is reduced, and better results can be obtained by athletes.

Description

Technical Field

[0001] This invention belongs to the field of rowing, and more specifically, relates to an airfoil propeller and a rowing boat. Background Technology

[0002] Rowing is a traditional Olympic sport. It is a water sport in which one or more rowers sit in a boat, facing away from the direction the boat is going, and use their muscle strength to propel the boat forward by paddling with oars and oarlocks through a simple lever action.

[0003] In a competition, time is the standard for measuring victory or defeat. 0.1 seconds can change the outcome of a game, so shortening the time is especially important for athletes.

[0004] However, the existing oar frames on racing boats are cylindrical, which creates resistance during the boat's movement, increasing the athlete's physical exertion and time. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an airfoil propeller frame and a racing boat, which can reduce the resistance encountered by the racing boat during its movement and reduce the time taken by the athletes.

[0006] The present invention provides an airfoil rotor assembly, including a main rotor assembly, wherein one end of the main rotor assembly is provided with a connecting frame connected to the rotor blade.

[0007] The upper end face of the main rotor is an arc-shaped first arc surface, and the lower end face is a first plane; the cross-section of the main rotor is "airfoil".

[0008] During travel, the air velocity on the first arc-shaped surface is greater than that on the first flat surface, resulting in a lower pressure on the upper surface of the main propeller frame than on the lower surface, and the main propeller frame is subjected to an upward thrust.

[0009] As a further improvement of the present invention, it also includes a mounting base, on which the main propeller frame is rotatably connected; and an auxiliary propeller frame is provided between the main propeller frame and the mounting base.

[0010] In use, the main rotor, auxiliary rotor, and mounting base form a triangular structure, thus the main rotor is stably positioned on the mounting base.

[0011] As a further improvement of the present invention, the upper end face of the auxiliary propeller is an arc-shaped second arc surface, the lower end face is a second plane, and the cross-section of the auxiliary propeller is "airfoil".

[0012] As a further improvement of the present invention, the lower end of the main propeller frame is provided with a cavity capable of accommodating the auxiliary propeller frame.

[0013] In its stowed state, the main propeller frame is parallel to the mounting base, and the auxiliary propeller frame is located within the cavity.

[0014] As a further improvement of the present invention, a sealing plate is slidably connected in the longitudinal direction within the cavity; a groove is provided on the sealing plate along the length direction of the main propeller frame; a rotating column is provided on the auxiliary propeller frame and slidably connected in the groove; and a latch is rotatably connected to the mounting base.

[0015] In use, the sealing plate is flush with the lower end face of the main propeller frame, and the latches fix the auxiliary propeller frame to the mounting base.

[0016] As a further improvement of the present invention, the upper end of the mounting base is provided with a mounting column; the lower end of the main propeller frame is provided with a rotating sleeve that is rotatably engaged with the mounting column; the upper end of the mounting column is provided with a receiving groove along the radial direction; and the sealing plate is provided with a longitudinally moving block that can engage with the receiving groove.

[0017] In use, the longitudinal moving block is located in the receiving groove, thereby restricting the rotation of the main propeller frame.

[0018] As a further improvement of the present invention, the axis of the mounting column has an angle with the vertical plane; the axis of the rotating sleeve is not perpendicular to the length direction of the main propeller frame.

[0019] As a further improvement of the present invention, the sealing plate is provided with an anti-rotation socket; an anti-rotation plug that can be inserted into the anti-rotation socket is slidably connected inside the rotating column along the length direction of the auxiliary propeller frame; and a connecting rod that is provided on the anti-rotation plug along the length direction of the auxiliary propeller frame is provided on the anti-rotation plug.

[0020] The latch is equipped with a slanted push block that can drive the connecting rod to move; in use, the slanted push block causes the anti-rotation plug to be inserted into the anti-rotation socket.

[0021] As a further improvement of the present invention, a backing plate is provided at the upper end of the mounting base; in the use state, the auxiliary propeller frame abuts against the backing plate.

[0022] A racing boat includes a hull, a slide seat slidably connected to the hull, and a pedal rotatably connected to the hull; airfoil propellers are mounted on both sides of the hull.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: This solution utilizes Bernoulli's principle to make the cross-section of the main propeller frame "airfoil", changing the pressure on the upper and lower surfaces of the main propeller frame, so that the main propeller frame is subjected to an upward thrust during the race, and thus the entire racing boat is subjected to an upward thrust, reducing the drag of the racing boat and allowing the athletes to achieve better results.

[0024] In use, the main rotor, auxiliary rotor, and mounting base form a stable triangular structure. Through the cooperation of the anti-rotation plug and the anti-rotation socket, the cooperation of the longitudinal moving block and the receiving groove, and the cooperation of the limiting plug and the limiting socket, the main rotor, auxiliary rotor, and mounting base are fixed to each other, making the main rotor firmly fixed.

[0025] This design rotates the main propeller shaft to make it parallel to the hull, reducing the overall width of the racing boat, facilitating its storage and retrieval, reducing the probability of collisions between the main propeller shaft and the outside world, and extending its service life.

[0026] The main propeller frame in this design is used to install the propeller blades, and the auxiliary propeller frame can also be stored in the cavity, further reducing the size of the racing boat and making it easier to store.

[0027] The sealing plate in this design can be used to seal the lower opening of the cavity, effectively reducing the airflow entering the cavity during travel. It can also control the cooperation between the longitudinal moving block and the receiving slot, and control the fixed relationship between the main propeller frame and the mounting base.

[0028] The locking mechanism in this design can control the engagement between the limit block and the limit socket, thus controlling the fixing relationship between the mounting base and the auxiliary propeller frame. It can also drive the anti-rotation block to move, controlling the engagement between the anti-rotation block and the anti-rotation socket, thus controlling the fixing relationship between the auxiliary propeller frame and the main propeller frame. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the racing boat of the present invention.

[0030] Figure 2 This is a schematic diagram of the airfoil propeller frame of the present invention in its retracted state.

[0031] Figure 3 This is a schematic diagram of the airfoil propeller frame of the present invention.

[0032] Figure 4 This is a schematic diagram of the main propeller frame of the present invention.

[0033] Figure 5 This is a schematic diagram of the auxiliary propeller frame of the present invention.

[0034] Figure 6 This is a schematic diagram of the airfoil propeller frame of the present invention in use.

[0035] Figure 7 This is a schematic diagram of the structure of the latch of the present invention after it is opened.

[0036] Figure 8 This is a schematic diagram of the structure of the present invention when the auxiliary propeller frame is housed in the cavity.

[0037] Figure 9 This is a schematic diagram of the main propeller frame and mounting base of the present invention.

[0038] Figure 10 This is a schematic diagram of the structure of the auxiliary propeller frame and anti-rotation plug of the present invention.

[0039] Explanation of the labels in the diagram:

[0040] 1. Hull; 11. Slide seat; 12. Pedal; 2. Main propeller arm; 201. First arc-shaped surface; 202. First plane; 21. Connecting frame; 22. Rotating sleeve; 23. Cavity; 3. Auxiliary propeller arm; 301. Second arc-shaped surface; 302. Second plane; 31. Rotating column; 32. Limiting socket; 4. Mounting seat; 41. Mounting column; 42. Receiving groove; 43. Support plate; 5. Lock; 51. Limiting block; 52. Angled push block; 6. Sealing plate; 61. Slide groove; 62. Anti-rotation socket; 63. Longitudinal moving block; 7. Anti-rotation block; 71. Connecting rod; 72. Spring. Detailed Implementation

[0041] Specific Implementation Example 1: Please refer to... Figure 1-10 An airfoil rotor assembly includes a main rotor assembly 2, one end of which is provided with a connecting frame 21 connected to the rotor blade.

[0042] The upper end face of the main rotor 2 is an arc-shaped first arc surface 201, and the lower end face is a first plane 202; the cross-section of the main rotor 2 is "airfoil".

[0043] During travel, the air velocity on the surface of the first arc-shaped surface 201 is greater than the air velocity on the surface of the first flat surface 202, resulting in the pressure on the upper end of the main propeller 2 being less than the pressure on the lower end of the main propeller 2, and the main propeller 2 being subjected to an upward thrust.

[0044] The airfoil rotor also includes a mounting base 4, on which the main rotor 2 is rotatably connected; a secondary rotor 3 is provided between the main rotor 2 and the mounting base 4.

[0045] In use, the main rotor 2, auxiliary rotor 3, and mounting base 4 form a triangular structure, thereby stably positioning the main rotor 2 on the mounting base 4.

[0046] The upper end face of the auxiliary rotor 3 is an arc-shaped second arc surface 301, and the lower end face is a second plane 302. The cross-section of the auxiliary rotor 3 is "airfoil".

[0047] The lower end of the main propeller frame 2 is provided with a cavity 23 that can accommodate the auxiliary propeller frame 3.

[0048] In the stowed state, the main rotor 2 is parallel to the mounting base 4, and the auxiliary rotor 3 is located inside the cavity 23. At this time, the overall volume of the airfoil rotor is small, making it easy to stow and store.

[0049] A sealing plate 6 is longitudinally slidably connected inside the cavity 23; a groove 61 is provided on the sealing plate 6 along the length direction of the main propeller frame 2; a rotating column 31 is provided on the auxiliary propeller frame 3 and slidably connected in the groove 61; a locking buckle 5 is rotatably connected to the mounting base 4.

[0050] In use, the sealing plate 6 is flush with the lower end face of the main propeller frame 2, and the latch 5 fixes the auxiliary propeller frame 3 to the mounting base 4.

[0051] The mounting base 4 is provided with a mounting column 41 at its upper end; the main propeller frame 2 is provided with a rotating sleeve 22 that is rotatably connected to the mounting column 41 at its lower end; the mounting column 41 is provided with a receiving groove 42 along the radial direction at its upper end; the sealing plate 6 is provided with a longitudinal moving block 63 that can engage with the receiving groove 42.

[0052] In use, the longitudinal moving block 63 is located in the receiving groove 42, thereby restricting the rotation of the main propeller frame 2 and fixing the main propeller frame 2.

[0053] The axis of the mounting column 41 forms an angle with the vertical plane; the axis of the rotating sleeve 22 is not perpendicular to the length direction of the main propeller frame 2.

[0054] In use, the main propeller frame 2 is perpendicular to the mounting base 4, and the main propeller frame 2 extends obliquely upward, so it will not collide with the moving propeller blades.

[0055] Because the axis of the mounting column 41 is inclined, when the main propeller 2 rotates along the rotating sleeve 22, the main propeller 2 will rotate obliquely in space, thus ensuring that the main propeller 2 is parallel to the mounting base 4 in the stored state, saving more space.

[0056] The sealing plate 6 is provided with an anti-rotation socket 62; the rotating column 31 is slidably connected with an anti-rotation block 7 that can be inserted into the anti-rotation socket 62 along the length direction of the auxiliary propeller frame 3; the anti-rotation block 7 is provided with a connecting rod 71 that is arranged along the length direction of the auxiliary propeller frame 3.

[0057] The latch 5 is provided with a slanted push block 52 that can drive the connecting rod 71 to move; in use, the slanted push block 52 causes the anti-rotation plug 7 to be inserted into the anti-rotation socket 62.

[0058] A spring 72 is installed between the anti-rotation plug 7 and the auxiliary propeller frame 3 to drive the anti-rotation plug 7 to separate from the anti-rotation socket 62; a limit socket 32 ​​is provided at the upper end of the auxiliary propeller frame 3; a limit plug 51 is provided on the latch 5 that can be inserted into the limit socket 32.

[0059] In use, the latch 5 rotates until the limit plug 51 is engaged with the limit socket 32, thereby fixing the auxiliary propeller frame 3 onto the mounting base 4.

[0060] The mounting base 4 is provided with a stop plate 43 at its upper end; in use, the auxiliary propeller frame 3 abuts against the stop plate 43, which facilitates the positioning of the auxiliary propeller frame 3.

[0061] A racing boat includes a hull 1, a slide seat 11 slidably connected to the hull body, and a pedal 12 rotatably connected to the hull 1; airfoil propellers are installed on both sides of the hull 1.

[0062] The length of the mounting base 4 is parallel to the length of the hull 1. In use, the main propeller 2 is perpendicular to the hull 1 and extends upwards at an angle relative to the hull 1. At this time, the overall width of the racing boat is large, occupying too much space, which is not convenient for the later storage and folding of the racing boat. In addition, during the movement or transportation of the racing boat, since the main propeller 2 extends to both sides of the hull 1, it is inevitably subject to impact, which can easily damage the main propeller 2. In the folded state, the length of the main propeller 2 is parallel to the length of the hull 1, and the main propeller 2 is placed at the top of the hull 1. At this time, the overall width of the racing boat is equal to the width of the hull 1. The overall width of the racing boat is small, and more racing boats can be stored in the same space. Furthermore, since the main propeller 2 is stored above the hull 1, it is less likely to collide with the outside world.

[0063] During movement, the airfoil propeller arms are in use. The athlete propels the blades, causing the hull 1 to move. This causes the airflow to impact the surfaces of the main propeller arm 2 and the auxiliary propeller arm 3. The airflow velocity differs between the upper and lower surfaces of the main propeller arm 2 and the auxiliary propeller arm 3, resulting in an upward thrust on the main propeller arm 2 and the auxiliary propeller arm 3. This reduces the overall drag on the hull 1, allowing the athlete to travel further with the same amount of force.

[0064] After use, organize and store the racing boat. The steps are as follows.

[0065] Rotate the latch 5 to open it, the limit block 51 separates from the limit socket 32, no longer restricting the movement of the auxiliary propeller frame 3, the inclined push block 52 separates from the connecting rod 71, and the spring 72 causes the anti-rotation block 7 to separate from the anti-rotation socket 62.

[0066] Next, move the auxiliary propeller frame 3 so that the rotating column 31 moves along the slide groove 61 toward the connecting frame 21, and at the same time move the auxiliary propeller frame 3 toward the cavity 23. Finally, the auxiliary propeller frame 3 moves to the bottom of the cavity 23.

[0067] Then the auxiliary propeller frame 3 is pushed into the cavity 23. The auxiliary propeller frame 23 drives the sealing plate 6 to move synchronously into the cavity 23. At the same time, the longitudinal moving block 63 separates from the receiving groove 42 and no longer restricts the rotation of the main propeller frame 2.

[0068] Rotate the main rotor 2 so that it moves inward toward the hull 1, and finally the main rotor 2 moves to the top of the mounting base 4, and the airfoil rotor moves to the retracted state.

[0069] When using the racing boat, first rotate the main propeller 2 to the outside of the hull 1 so that the main propeller 2 is perpendicular to the hull 1. At this time, the longitudinal moving block 63 is directly opposite the receiving groove 42. The auxiliary propeller 3 and the sealing plate 6 move downward under the action of gravity. The longitudinal moving block 63 is inserted into the receiving groove 42, restricting the movement of the main propeller 2. The auxiliary propeller 3 moves to the lower end of the main propeller 2.

[0070] Next, rotate the auxiliary propeller frame 3, and move the rotating column 31 toward the anti-rotation socket 62; move the auxiliary propeller frame 3 to abut against the stop plate 43, and then the anti-rotation socket 62 is aligned with the anti-rotation block 7.

[0071] Then rotate the latch 5 so that the limiting plug 51 on the latch 5 is inserted into the limiting socket 32, fixing one end of the auxiliary rotor frame 3 to the mounting base 4. At the same time, the inclined push block 52 abuts against the connecting rod 71 and pushes the anti-rotation plug 7 to be inserted into the anti-rotation socket 62, fixing the other end of the auxiliary rotor frame 3 to the main rotor frame 2, thus putting the airfoil rotor frame into use.

Claims

1. An airfoil rotor mount, characterized in that: Includes a main propeller frame (2), one end of which is provided with a connecting frame (21) connected to the propeller blade; The upper end face of the main rotor (2) is an arc-shaped first arc surface (201), and the lower end face is a first plane (202); the cross-section of the main rotor (2) is "airfoil-shaped"; During travel, the air velocity on the surface of the first arc-shaped surface (201) is greater than the air velocity on the surface of the first flat surface (202), and consequently the pressure on the upper surface of the main propeller (2) is less than the pressure on the lower surface of the main propeller (2), and the main propeller (2) is subjected to an upward thrust. It also includes a mounting base (4), on which the main propeller frame (2) is rotatably connected; a secondary propeller frame (3) is provided between the main propeller frame (2) and the mounting base (4). In use, the main propeller (2), auxiliary propeller (3), and mounting base (4) form a triangular structure, thereby the main propeller (2) is stably positioned on the mounting base (4); The lower end of the main propeller frame (2) is provided with a cavity (23) that can accommodate the auxiliary propeller frame (3). In the stowed state, the main propeller frame (2) is parallel to the mounting base (4), and the auxiliary propeller frame (3) is located inside the cavity (23).

2. The airfoil rotor mount according to claim 1, characterized in that: The upper end face of the auxiliary rotor (3) is an arc-shaped second arc surface (301), and the lower end face is a second plane (302). The cross-section of the auxiliary rotor (3) is "airfoil".

3. The airfoil rotor mount according to claim 1, characterized in that: A sealing plate (6) is longitudinally slidably connected inside the cavity (23); a groove (61) is provided on the sealing plate (6) along the length direction of the main propeller frame (2); a rotating column (31) is slidably connected to the auxiliary propeller frame (3) in the groove (61); a latch (5) is rotatably connected to the mounting base (4); In use, the sealing plate (6) is flush with the lower end face of the main propeller frame (2), and the latch (5) fixes the auxiliary propeller frame (3) on the mounting base (4).

4. The airfoil rotor mount according to claim 3, characterized in that: The mounting base (4) is provided with a mounting column (41) at its upper end; the main propeller frame (2) is provided with a rotating sleeve (22) that is rotatably connected to the mounting column (41) at its lower end; the mounting column (41) is provided with a receiving groove (42) along the radial direction at its upper end; the sealing plate (6) is provided with a longitudinal moving block (63) that can engage with the receiving groove (42). In use, the longitudinal moving block (63) is located in the receiving groove (42), thereby restricting the rotation of the main propeller frame (2).

5. The airfoil rotor mount according to claim 4, characterized in that: The axis of the mounting column (41) has an angle with the vertical plane; the axis of the rotating sleeve (22) is not perpendicular to the length direction of the main propeller frame (2).

6. The airfoil rotor mount according to claim 4, characterized in that: The sealing plate (6) is provided with an anti-rotation socket (62); the rotating column (31) is slidably connected with an anti-rotation block (7) that can be inserted into the anti-rotation socket (62) along the length direction of the auxiliary propeller frame (3); the anti-rotation block (7) is provided with a connecting rod (71) that is arranged along the length direction of the auxiliary propeller frame (3). The latch (5) is provided with a slanted push block (52) that can drive the connecting rod (71) to move; in use, the slanted push block (52) causes the anti-rotation plug (7) to be inserted into the anti-rotation socket (62).

7. The airfoil rotor mount according to claim 1, characterized in that: The mounting base (4) is provided with a stop plate (43) at its upper end; in use, the auxiliary propeller frame (3) abuts against the stop plate (43).

8. A racing boat, characterized in that: It includes a hull (1), a slide (11) slidably connected to the hull, and a pedal (12) rotatably connected to the hull (1); both sides of the hull (1) are equipped with airfoil propellers as described in any one of claims 1-7.

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