A propeller connection structure

Abstract

The utility model discloses a kind of oar connecting structure, to solve the insufficient axial bearing capacity of connecting piece on oar, the deficiency of poor connection reliability. The utility model includes paddle unit and paddle tube unit, connecting piece is connected between paddle unit and paddle tube unit, and the inner wall of connecting piece is provided with clamping convex, the one end of paddle tube unit is provided with mounting groove, and the one end of mounting groove is bent to form clamping portion, and clamping convex is inserted in clamping portion to realize the axial positioning of connecting piece. The axial force that connecting piece on oar can bear is big, and the reliability of connection is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of paddle technology, and more specifically, to a paddle connection structure. Background Technology

[0002] The existing methods for connecting propeller tubes and connectors in boat propellers mainly include the following: heat fitting, adhesive bonding, and spot bonding. None of these methods can guarantee a large axial connection force between the propeller tube and connector. Heat fitting is suitable for applications requiring low axial connection force; however, connection failure may occur when the required force exceeds 50 kg. While using specialized high-performance adhesives initially ensures bonding strength, the adhesive is prone to failure after water immersion or at low temperatures. Spot bonding has limitations on the materials used in plastic parts; deeper spots can easily cause the plastic parts to crack, and the axial connection force of spot bonding is also relatively small. For example, Chinese patent application number 2013104573775 discloses an assembled propeller where multiple propeller sections are connected by a connecting sleeve; however, this connection is prone to loosening after prolonged use. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides a paddle connection structure, which has a large axial force that the connector can withstand, thus ensuring the reliability of the connection.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a propeller connection structure, including a blade unit and a tube unit, a connector connecting the blade unit and the tube unit, a locking protrusion provided on the inner wall of the connector, an installation groove provided at one end of the tube unit, one end of the installation groove being bent to form a locking part, and the locking protrusion being inserted into the locking part to achieve axial positioning of the connector.

[0005] When assembling the connector with the propeller tube unit, the opening end of the mounting groove at the end of the propeller tube unit is aligned with the locking protrusion on the connector. Then, the connector and the propeller tube unit are axially close together for insertion. The locking protrusion slides along the mounting groove. After sliding to the locking part, the connector and the propeller tube unit are rotated circumferentially so that the locking protrusion is engaged with the locking part of the mounting groove to achieve axial positioning of the connector, which greatly increases the axial bearing capacity of the connector and ensures the reliability of the connection.

[0006] Preferably, a stepped surface is provided on the inner wall of the connector, and the end of the propeller tube unit or the end of the propeller blade unit rests on the stepped surface.

[0007] The stepped surface on the inner wall of the connector enables axial positioning of the propeller tube unit and the blade unit, ensuring the accuracy of the connector's connection position.

[0008] Preferably, one end of the connector is provided with two opposing clamping parts, the blade unit is clamped between the two clamping parts, and a locking piece is connected between the two clamping parts. The locking piece rotates to bring the two clamping parts closer to each other to clamp the blade unit.

[0009] The two clamping parts on the connector are clamped onto the outer wall of the blade unit, achieving a reliable connection between the connector and the blade unit. The rotation of the locking plate brings the two clamping parts closer together, further clamping the blade unit and improving the reliability of the connection.

[0010] Preferably, the two clamping parts are connected at one end to form an integral structure, and a tensioning member is connected between the other ends of the two clamping parts. The locking plate is rotatably connected to the tensioning member, and a cam is provided on the locking plate, with the cam pressing against the clamping part.

[0011] The two clamping parts are connected at one end to form a single unit, with a gap between the other ends. As the locking plate rotates and approaches the outer wall of the connecting part, the cam presses against the outer wall of the clamping part, pulling the tensioning element and reducing the gap between the two clamping parts, thus clamping the blade unit. Reversing the rotation of the locking plate increases the gap between the two clamping parts, releasing the blade unit.

[0012] Preferably, the tensioning component includes a threaded sleeve and a screw, with the threaded sleeve and screw being threadedly connected. A T-shaped hole is provided on one clamping part, and an insertion hole is provided on the other clamping part. The screw is inserted into the T-shaped hole, and the threaded sleeve is movably inserted into the insertion hole. A rotating shaft is mounted on the threaded sleeve, and a locking piece is rotatably connected to the rotating shaft.

[0013] The tensioning component, formed by the connection of a threaded sleeve and a screw, is easy to assemble. Furthermore, the length of the entire tensioning component can be adjusted by rotating the screw, thereby adjusting the tightness of the locking tab.

[0014] Preferably, the locking piece has an arc-shaped structure, the locking piece abuts against the outer wall of the clamping part, and the end of the locking piece is provided with an outwardly protruding tab.

[0015] The paddle design allows for easy rotation of the locking plate, with the arc-shaped locking plate resting against the outer wall of the clamping part, making it convenient to use.

[0016] Preferably, a waterproof plug is installed in the blade unit.

[0017] The waterproof plug serves to prevent water from seeping in and to prevent rust.

[0018] Preferably, a spring clip is installed in the blade unit, and a spring pin is provided on the spring clip. Limiting holes and positioning holes are respectively provided on the blade unit and the propeller tube unit, and the limiting holes and positioning holes are adapted to the spring pin for insertion connection.

[0019] After the blade unit and the propeller tube unit are inserted into place, the spring pin on the spring clip passes through the limiting hole and the positioning hole to achieve the connection and positioning of the two.

[0020] Preferably, one end of the propeller tube unit is connected to the blade unit, and the other end of the propeller tube unit is connected to the handle, forming a single propeller structure.

[0021] In this design, the connector is installed on the propeller of a single-propeller structure to ensure the reliability and safety of the propeller.

[0022] Another option is to connect blade units to both ends of the propeller tube unit to form a dual-propeller structure; one blade unit and one end of the propeller tube unit are connected to a connector, or both ends of the two blade units and the propeller tube unit are connected to connectors respectively.

[0023] In this design, the connector is installed on the propeller of a twin-propeller structure, ensuring the reliability and safety of the propeller.

[0024] Compared with the prior art, the beneficial effects of this utility model are: (1) the connecting parts on the paddle can withstand a large axial force, which ensures the reliability of the connection; (2) the two clamping parts on the connecting parts are clamped on the outer wall of the blade unit, realizing the reliable connection between the connecting parts and the blade unit; (3) the clamping force of the blade unit of the two clamping parts can be adjusted by rotating the screw; (4) the waterproof plug is installed in the blade unit, which plays a role in water isolation and rust prevention. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention.

[0026] Figure 2 This is a structural schematic diagram of Embodiment 2 of this utility model.

[0027] Figure 3 This is a structural schematic diagram of Embodiment 3 of this utility model.

[0028] Figure 4 This is a cross-sectional view of Embodiment 1 of this utility model.

[0029] Figure 5 This is a cross-sectional view of Embodiment 2 of this utility model.

[0030] Figure 6 This is a cross-sectional view of Embodiment 3 of this utility model.

[0031] Figure 7 This is an exploded view of the location of the connector in this utility model.

[0032] Figure 8 This is a connection diagram of the connector and the propeller tube unit of this utility model.

[0033] Figure 9 This is a cross-sectional view of the clamping part of the connector of this utility model.

[0034] In the diagram: 1. Blade unit, 2. Propeller tube unit, 3. Connector, 4. Snap-fit ​​protrusion, 5. Mounting groove, 6. Snap-fit ​​part, 7. Stepped surface, 8. Clamping part, 9. Locking piece, 10. Tensioner, 11. Cam, 12. Paddle, 13. Screw sleeve, 14. Screw, 15. T-hole, 16. Insertion hole, 17. Rotating shaft, 18. Waterproof plug, 19. Spring clip, 20. Spring pin, 21. Limiting hole, 22. Positioning hole, 23. Handle, 24. Connecting tube, 25. End plug, 26. Blade, 27. Lower section tube, 28. Middle section tube. Detailed Implementation

[0035] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0036] Example 1: A paddle connection structure (see...) Figure 1 , Figure 4 , Figure 7 , Figure 8 , Figure 9 The device includes a blade unit 1 and a tube unit 2 connected together. A connector 3 connects the blade unit 1 and the tube unit 2. The connector 3 has a tube-like structure. A locking protrusion 4 is provided on the inner wall of the connector 3. The locking protrusion 4 is cylindrical and is integral with the connector 3. A mounting groove 5 is provided at one end of the tube unit 2. One end of the mounting groove 5 is bent to form a locking part 6. The bending angle is not less than 90 degrees. The locking protrusion 4 is inserted into the locking part 6 to achieve axial positioning of the connector 3.

[0037] A stepped surface 7 is provided on the inner wall of the connector 3, and the end of the propeller tube unit 2 or the end of the blade unit 1 rests on the stepped surface 7. The step surface 7 on the inner wall of the connector 3 realizes the axial limitation of the propeller tube unit 2, ensuring the accuracy of the connection position between the connector 3 and the propeller tube unit 2.

[0038] One end of the connector 3 has two opposing clamping parts 8, and the blade unit 1 is clamped between the two clamping parts 8. A locking piece 9 is connected between the two clamping parts 8. The locking piece 9 rotates to bring the two clamping parts 8 closer together to clamp the blade unit 1. One end of the two clamping parts 8 is connected together as a single unit, and this end of the two clamping parts 8 is connected to the connector 3 as a single unit. The other end of the two clamping parts 8 is connected to a tensioning member 10. The locking piece 9 is rotatably connected to the tensioning member 10. A cam 11 is provided on the locking piece 9, and the cam 11 abuts against the clamping part 8. The locking piece 9 has an arc-shaped structure and abuts against the outer wall of the clamping part 8. An outwardly protruding lever 12 is provided at the end of the locking piece 9. The lever 12 facilitates the rotation of the locking piece 9, and the arc-shaped locking piece 9 abuts against the outer wall of the clamping part 8, making it convenient to use. The two clamping parts 8 are connected at one end to form an integral structure, and a gap is provided between the other ends of the two clamping parts 8. As the locking piece 9 rotates and approaches the outer wall of the connecting piece 3, the cam 11 presses against the outer wall of the clamping part 8, pulling the tensioning piece 10, thereby reducing the gap between the two clamping parts 8 and clamping the blade unit 1. Reverse rotation of the locking piece 9 increases the gap between the two clamping parts 8, releasing the blade unit 1.

[0039] The tensioning component 10 includes a threaded sleeve 13 and a screw 14. The threaded sleeve 13 and the screw 14 are threadedly connected. A T-shaped hole 15 is provided on one clamping part 8, and an insertion hole 16 is provided on the other clamping part 8. The screw 14 is inserted into the T-shaped hole 15, and the nut end of the screw 14 is supported on the transition surface inside the T-shaped hole 15. The threaded sleeve 13 is movably inserted into the insertion hole 16. The outer diameter of the threaded sleeve 13 is larger than the inner diameter of the T-shaped hole 15. A rotating shaft 17 is mounted on the threaded sleeve 13, and the locking piece 9 is rotatably connected to the rotating shaft 17. The tensioning component 10, formed by the connection of the threaded sleeve 13 and the screw 14, is easy to assemble. Moreover, the length of the entire tensioning component 10 can be adjusted by rotating the screw 14, thereby adjusting the tightness of the locking piece 9.

[0040] A waterproof plug 18 is installed in blade unit 1, which serves to prevent water and rust. A spring clip 19 with a U-shaped structure is installed in blade unit 1, and a spring pin 20 is provided on the spring clip 19. Limiting holes 21 and positioning holes 22 are respectively provided on blade unit 1 and blade tube unit 2, respectively. Both limiting holes 21 and positioning holes 22 are fitted and inserted into the spring pin 20. After blade unit 1 and blade tube unit 2 are inserted into place, the spring pin 20 on the spring clip 19 passes through the limiting holes 21 and positioning holes 22, achieving connection and positioning between the two.

[0041] One end of the propeller tube unit 2 is connected to the blade unit 1, and the other end of the propeller tube unit 2 is connected to the handle 23, forming a single propeller structure. The propeller tube unit 2 includes a connecting tube 24, one end of which is connected to an end plug 25, and the other end is connected to the handle 23. The end of the blade unit 1 rests on the stepped surface 7 inside the connector 3. The blade unit 1 includes a blade 26, a lower tube 27, and a middle tube 28. The lower tube 27 is fitted between the blade 26 and the middle tube, and the blade 26 and one end of the lower tube 27 are riveted together. A waterproof plug 18 is installed inside the other end of the lower tube 27. The middle tube 28 is inserted into the other end of the lower tube 27, and the middle tube 28 and the lower tube 27 are connected and positioned by a spring pin 20. The upper end of the middle tube 28 rests on the stepped surface 7 inside the connector 3. The lower end of the connecting tube 24 is inserted into the middle tube 28. Limiting hole 21 is provided on the middle section pipe 28, and positioning hole 22 is provided on the connecting pipe 24.

[0042] When assembling the connector 3 with the propeller tube unit 2, the opening end of the mounting groove 5 at the end of the propeller tube unit 2 is aligned with the locking protrusion 4 on the connector 3. Then, the connector 3 and the propeller tube unit 2 are axially close and inserted for connection. The locking protrusion 4 slides along the mounting groove 5. After sliding to the locking part 6, the connector 3 and the propeller tube unit 2 are rotated circumferentially so that the locking protrusion 4 is locked into the locking part 6 of the mounting groove 5 to achieve axial positioning of the connector 3, which greatly increases the axial bearing capacity of the connector 3 and ensures the reliability of the connection.

[0043] Example 2: A paddle connection structure (see Figure 2 , Figure 5 , Figure 7 , Figure 8 , Figure 9 The device includes a blade unit 1 and a tube unit 2 connected together. A connector 3 connects the blade unit 1 and the tube unit 2. The connector 3 has a tube-like structure. A locking protrusion 4 is provided on the inner wall of the connector 3. The locking protrusion 4 is cylindrical and is integral with the connector 3. A mounting groove 5 is provided at one end of the tube unit 2. One end of the mounting groove 5 is bent to form a locking part 6. The bending angle is not less than 90 degrees. The locking protrusion 4 is inserted into the locking part 6 to achieve axial positioning of the connector 3.

[0044] A stepped surface 7 is provided on the inner wall of the connector 3, and the end of the propeller tube unit 2 or the end of the blade unit 1 rests on the stepped surface 7. The step surface 7 on the inner wall of the connector 3 realizes the axial limitation of the propeller tube unit 2, ensuring the accuracy of the connection position between the connector 3 and the propeller tube unit 2.

[0045] One end of the connector 3 has two opposing clamping parts 8, and the blade unit 1 is clamped between the two clamping parts 8. A locking piece 9 is connected between the two clamping parts 8. The locking piece 9 rotates to bring the two clamping parts 8 closer together to clamp the blade unit 1. One end of the two clamping parts 8 is connected together as a single unit, and this end of the two clamping parts 8 is connected to the connector 3 as a single unit. The other end of the two clamping parts 8 is connected to a tensioning member 10. The locking piece 9 is rotatably connected to the tensioning member 10. A cam 11 is provided on the locking piece 9, and the cam 11 abuts against the clamping part 8. The locking piece 9 has an arc-shaped structure and abuts against the outer wall of the clamping part 8. An outwardly protruding lever 12 is provided at the end of the locking piece 9. The lever 12 facilitates the rotation of the locking piece 9, and the arc-shaped locking piece 9 abuts against the outer wall of the clamping part 8, making it convenient to use. The two clamping parts 8 are connected at one end to form an integral structure, and a gap is provided between the other ends of the two clamping parts 8. As the locking piece 9 rotates and approaches the outer wall of the connecting piece 3, the cam 11 presses against the outer wall of the clamping part 8, pulling the tensioning piece 10, thereby reducing the gap between the two clamping parts 8 and clamping the blade unit 1. Reverse rotation of the locking piece 9 increases the gap between the two clamping parts 8, releasing the blade unit 1.

[0046] The tensioning component 10 includes a threaded sleeve 13 and a screw 14. The threaded sleeve 13 and the screw 14 are threadedly connected. A T-shaped hole 15 is provided on one clamping part 8, and an insertion hole 16 is provided on the other clamping part 8. The screw 14 is inserted into the T-shaped hole 15, and the nut end of the screw 14 is supported on the transition surface inside the T-shaped hole 15. The threaded sleeve 13 is movably inserted into the insertion hole 16. The outer diameter of the threaded sleeve 13 is larger than the inner diameter of the T-shaped hole 15. A rotating shaft 17 is mounted on the threaded sleeve 13, and the locking piece 9 is rotatably connected to the rotating shaft 17. The tensioning component 10, formed by the connection of the threaded sleeve 13 and the screw 14, is easy to assemble. Moreover, the length of the entire tensioning component 10 can be adjusted by rotating the screw 14, thereby adjusting the tightness of the locking piece 9.

[0047] A waterproof plug 18 is installed in blade unit 1, which serves to prevent water and rust. A spring clip 19 with a U-shaped structure is installed in blade unit 1, and a spring pin 20 is provided on the spring clip 19. Limiting holes 21 and positioning holes 22 are respectively provided on blade unit 1 and blade tube unit 2, respectively. Both limiting holes 21 and positioning holes 22 are fitted and inserted into the spring pin 20. After blade unit 1 and blade tube unit 2 are inserted into place, the spring pin 20 on the spring clip 19 passes through the limiting holes 21 and positioning holes 22, achieving connection and positioning between the two.

[0048] The propeller tube unit 2 is connected to the blade unit 1 at both ends, forming a double-propeller structure; a connecting piece 3 is connected to one end of the blade unit 1 and the propeller tube unit 2. The propeller tube unit 2 includes a connecting pipe 24, and the blade unit 1 includes a blade 26 and a lower section tube 27 connected together. The blade 26 and the lower section tube 27 are connected by rivets. A waterproof plug 18 is installed inside the lower section tube 27. One end of the connecting pipe 24 is inserted into the lower section tube 27, and a spring pin 20 is connected between the connecting pipe 24 and the lower section tube 27. The other end of the connecting pipe 24 is connected to the connecting piece 3, and the end of the connecting pipe 24 rests on the stepped surface 7 inside the connecting piece 3. A limiting hole 21 is provided on the lower section tube 27, and a positioning hole 22 is provided on the connecting pipe 24.

[0049] When assembling the connector 3 with the propeller tube unit 2, the opening end of the mounting groove 5 at the end of the propeller tube unit 2 is aligned with the locking protrusion 4 on the connector 3. Then, the connector 3 and the propeller tube unit 2 are axially close and inserted for connection. The locking protrusion 4 slides along the mounting groove 5. After sliding to the locking part 6, the connector 3 and the propeller tube unit 2 are rotated circumferentially so that the locking protrusion 4 is locked into the locking part 6 of the mounting groove 5 to achieve axial positioning of the connector 3, which greatly increases the axial bearing capacity of the connector 3 and ensures the reliability of the connection.

[0050] Example 3: A paddle connection structure (see Figure 3 , Figure 6 , Figure 7 , Figure 8 , Figure 9 The device includes a blade unit 1 and a tube unit 2 connected together. A connector 3 connects the blade unit 1 and the tube unit 2. The connector 3 has a tube-like structure. A locking protrusion 4 is provided on the inner wall of the connector 3. The locking protrusion 4 is cylindrical and is integral with the connector 3. A mounting groove 5 is provided at one end of the tube unit 2. One end of the mounting groove 5 is bent to form a locking part 6. The bending angle is not less than 90 degrees. The locking protrusion 4 is inserted into the locking part 6 to achieve axial positioning of the connector 3.

[0051] A stepped surface 7 is provided on the inner wall of the connector 3, and the end of the propeller tube unit 2 or the end of the blade unit 1 rests on the stepped surface 7. The step surface 7 on the inner wall of the connector 3 realizes the axial limitation of the propeller tube unit 2, ensuring the accuracy of the connection position between the connector 3 and the propeller tube unit 2.

[0052] One end of the connector 3 has two opposing clamping parts 8, and the blade unit 1 is clamped between the two clamping parts 8. A locking piece 9 is connected between the two clamping parts 8. The locking piece 9 rotates to bring the two clamping parts 8 closer together to clamp the blade unit 1. One end of the two clamping parts 8 is connected together as a single unit, and this end of the two clamping parts 8 is connected to the connector 3 as a single unit. The other end of the two clamping parts 8 is connected to a tensioning member 10. The locking piece 9 is rotatably connected to the tensioning member 10. A cam 11 is provided on the locking piece 9, and the cam 11 abuts against the clamping part 8. The locking piece 9 has an arc-shaped structure and abuts against the outer wall of the clamping part 8. An outwardly protruding lever 12 is provided at the end of the locking piece 9. The lever 12 facilitates the rotation of the locking piece 9, and the arc-shaped locking piece 9 abuts against the outer wall of the clamping part 8, making it convenient to use. The two clamping parts 8 are connected at one end to form an integral structure, and a gap is provided between the other ends of the two clamping parts 8. As the locking piece 9 rotates and approaches the outer wall of the connecting piece 3, the cam 11 presses against the outer wall of the clamping part 8, pulling the tensioning piece 10, thereby reducing the gap between the two clamping parts 8 and clamping the blade unit 1. Reverse rotation of the locking piece 9 increases the gap between the two clamping parts 8, releasing the blade unit 1.

[0053] The tensioning component 10 includes a threaded sleeve 13 and a screw 14. The threaded sleeve 13 and the screw 14 are threadedly connected. A T-shaped hole 15 is provided on one clamping part 8, and an insertion hole 16 is provided on the other clamping part 8. The screw 14 is inserted into the T-shaped hole 15, and the nut end of the screw 14 is supported on the transition surface inside the T-shaped hole 15. The threaded sleeve 13 is movably inserted into the insertion hole 16. The outer diameter of the threaded sleeve 13 is larger than the inner diameter of the T-shaped hole 15. A rotating shaft 17 is mounted on the threaded sleeve 13, and the locking piece 9 is rotatably connected to the rotating shaft 17. The tensioning component 10, formed by the connection of the threaded sleeve 13 and the screw 14, is easy to assemble. Moreover, the length of the entire tensioning component 10 can be adjusted by rotating the screw 14, thereby adjusting the tightness of the locking piece 9.

[0054] A waterproof plug 18 is installed in blade unit 1, which serves to prevent water and rust. A spring clip 19 with a U-shaped structure is installed in blade unit 1, and a spring pin 20 is provided on the spring clip 19. Limiting holes 21 and positioning holes 22 are respectively provided on blade unit 1 and blade tube unit 2, respectively. Both limiting holes 21 and positioning holes 22 are fitted and inserted into the spring pin 20. After blade unit 1 and blade tube unit 2 are inserted into place, the spring pin 20 on the spring clip 19 passes through the limiting holes 21 and positioning holes 22, achieving connection and positioning between the two.

[0055] The propeller tube unit 2 is connected to the blade units 1 at both ends, forming a double-propeller structure. Connectors 3 are connected to both ends of the blade units 1 and the propeller tube unit 2. The propeller tube unit 2 includes a connecting pipe 24. The blade unit 1 includes blades 26 and a lower section pipe 27 connected together. Blades 26 and the lower section pipe 27 are connected by rivets. A waterproof plug 18 is installed inside the lower section pipe 27. One end of the connecting pipe 24 is inserted into the lower section pipe 27, and a spring pin 20 connects the connecting pipe 24 and the lower section pipe 27. Connectors 3 are connected to both ends of the connecting pipe 24, and the end of the connecting pipe 24 rests on the stepped surface 7 inside the connecting pipe 3. A limiting hole 21 is provided on the lower section pipe 27, and a positioning hole 22 is provided on the connecting pipe 24.

[0056] When assembling the connector 3 with the propeller tube unit 2, the opening end of the mounting groove 5 at the end of the propeller tube unit 2 is aligned with the locking protrusion 4 on the connector 3. Then, the connector 3 and the propeller tube unit 2 are axially close and inserted for connection. The locking protrusion 4 slides along the mounting groove 5. After sliding to the locking part 6, the connector 3 and the propeller tube unit 2 are rotated circumferentially so that the locking protrusion 4 is locked into the locking part 6 of the mounting groove 5 to achieve axial positioning of the connector 3, which greatly increases the axial bearing capacity of the connector 3 and ensures the reliability of the connection.

[0057] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A paddle connection structure, characterized in that, It includes a blade unit and a tube unit, and a connector is connected between the blade unit and the tube unit. A locking protrusion is provided on the inner wall of the connector. One end of the tube unit is provided with a mounting groove. One end of the mounting groove is bent to form a locking part. The locking protrusion is inserted into the locking part to achieve axial positioning of the connector.

2. The paddle connection structure according to claim 1, characterized in that, A stepped surface is provided on the inner wall of the connector, and the end of the propeller tube unit or the end of the propeller blade unit rests on the stepped surface.

3. The oar connection structure according to claim 1, characterized in that, One end of the connector is provided with two opposing clamping parts. The blade unit is clamped between the two clamping parts. A locking piece is connected between the two clamping parts. The locking piece rotates to bring the two clamping parts closer to each other and clamp the blade unit.

4. The oar connection structure according to claim 3, characterized in that, The two clamping parts are connected at one end to form an integral structure, and a tensioning member is connected between the other ends of the two clamping parts. The locking plate is rotatably connected to the tensioning member, and a cam is provided on the locking plate, with the cam pressing against the clamping part.

5. The paddle connection structure according to claim 4, characterized in that, The tensioning component includes a threaded sleeve and a screw. The threaded sleeve and the screw are threadedly connected. A T-shaped hole is provided on one clamping part, and an insertion hole is provided on the other clamping part. The screw is inserted into the T-shaped hole, and the threaded sleeve is movably inserted into the insertion hole. A rotating shaft is installed on the threaded sleeve, and a locking piece is rotatably connected to the rotating shaft.

6. The paddle connection structure according to claim 3, characterized in that, The locking piece has an arc-shaped structure and rests against the outer wall of the clamping part. The end of the locking piece is provided with an outwardly protruding tab.

7. The oar connection structure according to claim 1, characterized in that, A waterproof plug is installed in the blade unit.

8. The oar connection structure according to claim 1, characterized in that, A spring clip is installed in the blade unit, and a spring pin is set on the spring clip. Limiting holes and positioning holes are respectively set on the blade unit and the propeller tube unit. The limiting holes and positioning holes are adapted to the spring pin for insertion and connection.

9. A paddle connection structure according to any one of claims 1 to 8, characterized in that, One end of the propeller tube unit is connected to the blade unit, and the other end of the propeller tube unit is connected to the handle, forming a single propeller structure.

10. A paddle connection structure according to any one of claims 1 to 8, characterized in that, Both ends of the propeller tube unit are connected to the blade unit, forming a dual-propeller structure; one blade unit and one end of the propeller tube unit are connected to a connector, or both ends of the two blade units and the propeller tube unit are connected to connectors respectively.

Images