Propeller primary-secondary transmission assembly with dual protection

Abstract

The propeller primary-secondary transmission assembly with the dual protection function comprises a secondary transmission shaft sleeve and a primary transmission shaft sleeve, a plurality of first transmission protruding blocks and a plurality of second transmission protruding blocks are fixedly arranged on the peripheral face of the secondary transmission shaft sleeve, and the first transmission protruding blocks and the second transmission protruding blocks are arranged in a staggered mode; the female transmission shaft sleeve is provided with a plurality of first transmission grooves and a plurality of second transmission grooves, the first transmission grooves and the second transmission grooves are arranged in a staggered mode, the first transmission protruding blocks are arranged in the first transmission grooves in a penetrating mode respectively, and the second transmission protruding blocks are arranged in the second transmission grooves in a penetrating mode respectively. When the sub-transmission shaft sleeve rotates towards any direction, each first transmission bump respectively rotates to abut against the groove body of each first transmission groove to pass through an angle A; the second transmission convex blocks respectively rotate to abut against the second transmission groove bodies and rotate to pass through the angle B; and the angle A is smaller than the angle B. The effect that the transmission assembly is not prone to losing the transmission capacity is achieved.

Description

Technical Field

[0001] The present application relates to the field of propellers, and in particular to a propeller transmission assembly with double protection. Background Art

[0002] The propeller is the most widely used propeller on various types of ships. It can convert about 70% of mechanical power into propulsion force. It has the advantages of simple structure, low cost, easy use and high efficiency. Figure 1 , Figure 2 as well as Figure 3 The marine propeller mainly includes a propeller hub, a plurality of propeller blades fixed to the propeller hub, and a transmission assembly arranged in the propeller hub. When working, the drive shaft of the drive motor transmits power to the transmission assembly, and the transmission assembly drives the propeller hub to rotate. The rotation of the propeller hub can generate continuous propulsion power through the propeller blades.

[0003] In the prior art, the transmission assembly between the drive shaft and the propeller hub generally includes a sub-transmission sleeve and a female transmission sleeve. The sub-transmission sleeve is coaxially fixed to the drive shaft, and the female transmission sleeve is coaxially fixed to the propeller hub. Four transmission protrusions are fixedly connected to the outer circumference of the sub-transmission sleeve, and four transmission grooves are opened on the inner circumference of the female transmission sleeve. Each transmission protrusion is respectively inserted into each transmission groove. When the drive shaft rotates, the sub-transmission sleeve drives the female transmission sleeve to rotate through the abutment between each transmission protrusion and each transmission groove body. The rotation of the female transmission sleeve drives the propeller hub to rotate, thereby completing the transmission of power.

[0004] With regard to the above-mentioned related technologies, when the propeller blades are hit by external force or overloaded, it is easy to cause excessive contact stress between the transmission bump and the transmission groove, which in turn easily causes damage to the transmission bump or the transmission groove structure, and finally causes the transmission assembly to lose its transmission ability, making it difficult for the propeller to work normally. Summary of the invention

[0005] In order to prevent the transmission assembly from losing transmission capability when the propeller is hit or overloaded, the present application provides a propeller sub-transmission assembly with double protection.

[0006] The present application provides a propeller transmission assembly with double protection, which adopts the following technical solution:

[0007] A propeller sub-transmission assembly with double protection, comprising a sub-transmission shaft sleeve and a main transmission shaft sleeve, wherein a plurality of first transmission protrusions and a plurality of second transmission protrusions are fixedly arranged on the outer circumference of the sub-transmission shaft sleeve, and each of the first transmission protrusions and each of the second transmission protrusions are arranged alternately;

[0008] The female transmission sleeve is provided with a plurality of first transmission grooves and a plurality of second transmission grooves, and the first transmission grooves and the second transmission grooves are arranged alternately. When the sub-transmission sleeve is rotated and arranged in the middle position of the female transmission sleeve, the first transmission protrusions are respectively inserted into the first transmission grooves, and the second transmission protrusions are respectively inserted into the second transmission grooves.

[0009] When the sub-transmission sleeve rotates in any direction, each of the first transmission protrusions rotates to an angle A through which it abuts against each of the first transmission groove bodies; each of the second transmission protrusions rotates to an angle B through which it abuts against each of the second transmission groove bodies; and the angle A is smaller than the angle B.

[0010] By adopting the above technical solution, when the transmission assembly is transmitting, each first transmission protrusion rotates to abut against each first transmission groove body, and then the sub-transmission sleeve rotates to drive each first transmission protrusion to rotate, and each first transmission protrusion drives the female transmission sleeve to rotate through each first transmission groove body, thereby completing the power transmission, while at this time, each second transmission protrusion is not easy to abut against each second transmission groove body and is not easy to transmit;

[0011] When the propeller is hit by external force or overloaded, the contact stress between each first transmission protrusion and each first transmission groove body is too large, which causes each first transmission groove body to deform, thereby increasing the deflection angle between the sub-transmission sleeve and the mother transmission sleeve, so that each second transmission protrusion abuts against each second transmission groove body, so that the power transmission of the transmission assembly continues to be carried out stably through each second transmission protrusion, improving the problem that when the propeller blades are hit by external force or overloaded, the contact stress between the transmission protrusion and the transmission groove is too large, which easily causes damage to the transmission protrusion or the transmission groove body structure, and finally causes the transmission assembly to lose its transmission ability, making it difficult for the propeller to work normally.

[0012] Optionally, when the sub-transmission sleeve rotates in any direction, the maximum rotation angle of A is between 8 degrees and 16 degrees, and the maximum rotation angle of B is between 16 degrees and 32 degrees.

[0013] Optionally, the cross-sectional shape of each of the first transmission bumps and each of the second transmission bumps includes an isosceles trapezoid, a rectangle and a square.

[0014] By adopting the above technical solution, the structural strength between each first transmission lug and each second transmission lug is improved, so that the service life of each first transmission lug and each second transmission lug is improved, and the usability is improved.

[0015] Optionally, each of the first transmission lugs includes two symmetrically distributed first side surfaces, and each of the second transmission lugs includes two symmetrically distributed second side surfaces;

[0016] Each of the first transmission groove bodies includes two symmetrically distributed first transmission surfaces, and each of the second transmission groove bodies includes two symmetrically distributed second transmission surfaces;

[0017] When each of the first transmission protrusions is rotated to abut against each of the first transmission groove bodies, each of the first transmission surfaces on the same side is respectively fitted with each of the second transmission surfaces on the same side; when each of the second transmission protrusions is rotated to abut against each of the second transmission groove bodies, each of the second transmission surfaces on the same side is respectively fitted with each of the second transmission surfaces on the same side.

[0018] By adopting the above technical solution, when the transmission component is transmitting, the first transmission surface and the first side surface are in contact with each other for transmission, or the second transmission surface and the second side surface are in contact with each other for transmission, so that the contact area of ​​the transmission is larger and more stable. Therefore, when the transmission component is transmitting, the torque borne by each first transmission groove body is increased, so that the transmission stability of the transmission component is better and the usability is better.

[0019] Optionally, each of the first transmission bumps and each of the second transmission bumps have the same shape and structure, and the distance between each of the first transmission bumps and each of the two adjacent second transmission bumps is the same.

[0020] Optionally, each of the first transmission lugs includes two to six, and each of the second transmission lugs includes two to six.

[0021] Optionally, the outer circumferential surface of the sub-transmission shaft sleeve is wrapped with a rubber sleeve, and the rubber sleeve wraps each of the first transmission protrusions and each of the second transmission protrusions.

[0022] By adopting the above technical solution and setting the rubber sleeve, the connection between the sub-transmission shaft sleeve and the main transmission shaft sleeve is transformed from a hard connection to a soft connection, so that the vibration transmitted by the transmission component during transmission is absorbed and buffered by the rubber sleeve, thereby reducing the noise generated by the ship during idling and sailing, which is more conducive to protecting marine life and making it more environmentally friendly.

[0023] Optionally, the female transmission sleeve includes a plurality of third transmission surfaces. When the sub-transmission sleeve is rotated and set in the middle position of the female transmission sleeve, each of the third transmission surfaces abuts against the outer peripheral surface of the rubber sleeve, and the arc diameter size of each of the third transmission surfaces is the same as the diameter size of the rubber sleeve.

[0024] Optionally, the material used for the female transmission sleeve is a material with a honeycomb structure.

[0025] By adopting the above-mentioned technical scheme, the contact stress between each first transmission protrusion and each first transmission groove is made too large. When the groove body of each first transmission groove is deformed, the female transmission sleeve undergoes irreversible concave deformation, so that each first transmission groove with destructive deformation is not easy to affect the transmission component to continue power transmission, thereby improving the usability.

[0026] Optionally, a plurality of driving protrusions are fixedly provided on the inner circumferential surface of the sub-transmission shaft sleeve, and the driving protrusions are evenly distributed around the circumference of the sub-transmission shaft sleeve.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. When the transmission assembly is transmitting, each first transmission protrusion rotates until it abuts against each first transmission groove body, and then the sub-transmission sleeve rotates to drive each first transmission protrusion to rotate, and each first transmission protrusion drives the female transmission sleeve to rotate through each first transmission groove body, thereby completing the power transmission, while at this time, each second transmission protrusion is not easy to abut against each second transmission groove body and is not easy to transmit;

[0029] When the propeller is hit by external force or overloaded, the contact stress between each first transmission protrusion and each first transmission groove body is too large, which causes each first transmission groove body to deform, thereby increasing the deflection angle between the sub-transmission sleeve and the mother transmission sleeve, so that each second transmission protrusion abuts against each second transmission groove body, so that the power transmission of the transmission assembly continues to be stable through each second transmission protrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of the propeller Figure 1 ;

[0031] Figure 2 This is a schematic diagram of the overall structure of the propeller Figure 2 ;

[0032] Figure 3 This is a schematic diagram of the overall structure of the propeller Figure 3 ;

[0033] Figure 4 It is a schematic diagram of the overall structure of the embodiment of the present application;

[0034] Figure 5 This is a schematic diagram of the transmission sleeve structure of the embodiment of the present application. Figure 1 ;

[0035] Figure 6 This is a schematic diagram of the transmission sleeve structure of the embodiment of the present application. Figure 2 ;

[0036] Figure 7This is a schematic diagram of the structure of the female transmission sleeve of an embodiment of the present application;

[0037] Figure 8 is a cross-sectional view of a transmission assembly according to an embodiment of the present application;

[0038] Fig. 9 It is a schematic diagram of the rubber sleeve wrapping of an embodiment of the present application.

[0039] Explanation of the accompanying drawings: 1. Sub-transmission sleeve; 11. Connecting hole; 111. Driving protrusion; 12. First shaft body; 121. Connecting protrusion; 13. Second shaft body; 131. First transmission protrusion; 1311. First side surface; 132. Second transmission protrusion; 1321. Second side surface; 2. Mother transmission sleeve; 21. Connecting surface; 22. Transmission hole; 221. First transmission groove; 2211. First transmission surface; 222. Second transmission groove; 2221. Second transmission surface; 223. Third transmission surface; 3. Rubber sleeve; 10. Transmission assembly; 20. Propeller; 201. Propeller stem; 202. Propeller blade. DETAILED DESCRIPTION

[0040] The following is combined with Figure 4-9 This application is described in further detail.

[0041] The present application embodiment discloses a propeller transmission assembly with double protection. Figure 4 A propeller transmission assembly with double protection includes a sub-transmission sleeve 1 and a main transmission sleeve 2.

[0042] Reference Figure 5 and Figure 6 The sub-transmission sleeve 1 is cylindrical, and a connecting hole 11 is provided in the middle position of the sub-transmission sleeve 1. The connecting hole 11 is used to connect with the driving shaft of the driving motor. A plurality of driving protrusions 111 are fixedly provided on the inner circumference of the hole wall of the connecting hole 11. The driving protrusions 111 are evenly distributed around the sub-transmission sleeve 1 in the circumferential direction, so that the connection between the sub-transmission sleeve 1 and the driving shaft of the driving motor is tighter and more stable. The sub-transmission sleeve 1 includes a first shaft body portion 12 and a second shaft body portion 13. The second shaft body portion 13 is fixedly connected to one end of the first shaft body portion 12. The diameter of the first shaft body portion 12 is larger than the diameter of the second shaft body portion 13. The height of the first shaft body portion 12 is smaller than the height of the second shaft body portion 13. Two connecting protrusions 121 are fixedly provided on the side of the first shaft body portion 12 away from the second shaft body portion 13. The two connecting protrusions 121 are evenly distributed around the axis of the first shaft body portion 12 in the circumferential direction.

[0043] Reference Figure 5 and Figure 6Four first transmission protrusions 131 and four second transmission protrusions 132 are fixedly arranged on the outer circumferential surface of the second shaft body portion 13, each first transmission protrusion 131 is evenly distributed around the axis of the sub-transmission shaft sleeve 1, and each second transmission protrusion 132 is evenly distributed around the axis of the sub-transmission shaft sleeve 1. The first transmission protrusions 131 and the second transmission protrusions 132 are staggered, and the first transmission protrusions 131 and the second transmission protrusions 132 have the same shape and structure, and the distance between each first transmission protrusion 131 and each adjacent second transmission protrusion 132 is the same. In the embodiment of the present application, the cross-sectional shape of each first transmission protrusion 131 and each second transmission protrusion 132 is an isosceles trapezoid.

[0044] During assembly, the second shaft body portion 13 is first assembled to the propeller, and then the first shaft body portion 12 is fixedly connected to one end of the second shaft body portion 13 , thereby completing the assembly of the sub-transmission sleeve 1 .

[0045] Reference Figure 7 The female transmission sleeve 2 is cylindrical, and the outer peripheral surface of the female transmission sleeve 2 includes four connecting surfaces 21. When the female transmission sleeve 2 is fixed to the propeller, each connecting surface 21 is in contact with the propeller, so that relative rotation between the female transmission sleeve 2 and the propeller is not easy to occur. A transmission hole 22 is provided in the middle position of the female transmission sleeve 2, and the sub-transmission sleeve 1 is penetrated and rotatably set in the transmission hole 22.

[0046] Reference Figure 7 and Figure 8 The transmission hole 22 is provided with four first transmission grooves 221 and four second transmission grooves 222. The first transmission grooves 221 are evenly distributed around the axis of the mother transmission sleeve 2, and the second transmission grooves 222 are evenly distributed around the axis of the mother transmission sleeve 2. The first transmission grooves 221 and the second transmission grooves 222 are staggered. When the sub-transmission sleeve 1 is rotated and set in the middle position of the mother transmission sleeve 2, the first transmission protrusions 131 are respectively penetrated in the first transmission grooves 221, and the second transmission protrusions 132 are respectively penetrated in the second transmission grooves 222.

[0047] Reference Figure 8 When the sub-transmission sleeve 1 rotates in any direction, each first transmission protrusion 131 rotates to an angle A through which it abuts against the groove body of each first transmission groove 221, and each second transmission protrusion 132 rotates to an angle B through which it abuts against the groove body of each second transmission groove 222. The angle of A is smaller than the angle of B. In the embodiment of the present application, when the sub-transmission sleeve 1 rotates in any direction, the maximum rotation angle of A is 12 degrees, that is, the average buffer rotation angle of A is 6 degrees, and the maximum rotation angle of B is 24 degrees, that is, the average buffer rotation angle of B is 12 degrees.

[0048] Reference Figure 5 and Figure 7Each first transmission protrusion 131 includes two symmetrically distributed first side surfaces 1311, each second transmission protrusion 132 includes two symmetrically distributed second side surfaces 1321, each first transmission groove 221 includes two symmetrically distributed first transmission surfaces 2211, and each second transmission groove 222 includes two symmetrically distributed second transmission surfaces 2221. When each first transmission protrusion 131 is rotated to abut against the first transmission groove 221, each first transmission surface 2211 on the same side is respectively fitted with each second transmission surface 2221 on the same side. When each second transmission protrusion 132 is rotated to abut against the second transmission groove 222, each second transmission surface 2221 on the same side is respectively fitted with each second transmission surface 2221 on the same side.

[0049] Reference Figure 5 and Figure 7 When the transmission component is transmitting, the first transmission surface 2211 and the first side surface 1311 are in close contact with each other, or the second transmission surface 2221 and the second side surface 1321 are in close contact with each other, so that the contact area of ​​the transmission is larger and more stable. Therefore, when the transmission component is transmitting, the torque borne by each first transmission groove 221 is increased, so that the transmission stability of the transmission component is better.

[0050] Reference Figure 4 and Fig. 9 The outer circumferential surface of the sub-transmission shaft sleeve 1 is wrapped with a rubber sleeve 3, and the rubber sleeve 3 wraps each first transmission protrusion 131 and each second transmission protrusion 132, so that the connection between the sub-transmission shaft sleeve 1 and the mother transmission shaft sleeve 2 is changed from a hard connection to a soft connection, so that the vibration transmitted by the transmission component during transmission is absorbed and buffered by the rubber sleeve 3, thereby reducing the noise generated by the ship during idling and sailing, which is more conducive to protecting marine life.

[0051] Reference Figure 4 and Fig. 9 The female transmission sleeve 2 includes a plurality of third transmission surfaces 223. When the sub-transmission sleeve 1 is rotated and set in the middle position of the female transmission sleeve 2, each third transmission surface 223 abuts against the outer peripheral surface of the rubber sleeve 3. The arc diameter size of each third transmission surface 223 is the same as the diameter size of the rubber sleeve 3, thereby ensuring the coaxiality between the female transmission sleeve 2 and the sub-transmission sleeve 1, thereby making the transmission stability between the sub-transmission sleeve 1 and the female transmission sleeve 2 better.

[0052] The material used for the female transmission sleeve 2 in the embodiment of the present application is a composite nylon material made of nylon and glass fiber. The composite nylon is composed of nylon and glass fiber. The addition of different proportions of glass fiber in the composite nylon (such as 10%, 20%, 30%, 40%, 50%) significantly affects the strength, rigidity and toughness of the material, and is suitable for different application requirements.

[0053] 10% glass fiber added Features: Slightly enhances the strength and rigidity of the material and improves heat resistance.

[0054] Adding 20% ​​glass fiber features: significantly improve tensile strength and rigidity, increase dimensional stability.

[0055] Features of 30% glass fiber: Significantly enhance material strength and rigidity while maintaining good toughness and impact performance.

[0056] The addition of 40% glass fiber features: extremely high strength and rigidity, significantly reducing material shrinkage.

[0057] Features of 50% glass fiber: Maximize strength, but may sacrifice some toughness and increase brittleness.

[0058] The composite nylon material used in the embodiment of the present application is mixed with 30% glass fiber, so that the contact stress between each first transmission protrusion 131 and each first transmission groove 221 is too large. When the groove body of each first transmission groove 221 is deformed, the female transmission sleeve 2 undergoes irreversible concave deformation, so that the first transmission grooves 221 with destructive deformation are not easy to affect the transmission component to continue power transmission.

[0059] The implementation principle of the propeller mother-child transmission assembly with double protection in the embodiment of the present application is as follows: when the transmission assembly is transmitting, each first transmission protrusion 131 rotates and respectively rotates to abut against each first transmission groove 221 slot body, and then the sub-transmission shaft sleeve 1 rotates to drive each first transmission protrusion 131 to rotate, and each first transmission protrusion 131 drives the mother transmission shaft sleeve 2 to rotate through each first transmission groove 221 slot body, thereby completing the power transmission, and at this time, each second transmission protrusion 132 is not easy to abut against each second transmission groove 222 slot body and is not easy to transmit;

[0060] When the propeller is hit by external force or overloaded, the contact stress between each first transmission protrusion 131 and each first transmission groove 221 is too large, which causes the first transmission groove 221 to deform, thereby increasing the deflection angle between the sub-transmission sleeve 1 and the mother transmission sleeve 2, so that each second transmission protrusion 132 abuts against each second transmission groove 222, so that the power transmission of the transmission assembly continues to be carried out stably through each second transmission protrusion 132, thereby improving the problem that when the propeller blades are hit by external force or overloaded, the contact stress between the transmission protrusion and the transmission groove is too large, which easily causes damage to the transmission protrusion or the transmission groove structure, and finally causes the transmission assembly to lose its transmission ability, making it difficult for the propeller to work normally.

[0061] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A propeller transmission assembly with double protection, characterized in that: It comprises a sub-transmission shaft sleeve (1) and a main transmission shaft sleeve (2), wherein a plurality of first transmission protrusions (131) and a plurality of second transmission protrusions (132) are fixedly arranged on the outer peripheral surface of the sub-transmission shaft sleeve (1), and each of the first transmission protrusions (131) and each of the second transmission protrusions (132) are arranged alternately; The female transmission sleeve (2) is provided with a plurality of first transmission grooves (221) and a plurality of second transmission grooves (222), and the first transmission grooves (221) and the second transmission grooves (222) are arranged alternately. When the sub-transmission sleeve (1) is rotated and arranged at a middle position of the female transmission sleeve (2), the first transmission protrusions (131) are respectively inserted into the first transmission grooves (221), and the second transmission protrusions (132) are respectively inserted into the second transmission grooves (222); When the sub-transmission shaft sleeve (1) rotates in any direction, each of the first transmission protrusions (131) rotates to abut against the groove body of each of the first transmission grooves (221) through an angle of A; each of the second transmission protrusions (132) rotates to abut against the groove body of each of the second transmission grooves (222) through an angle of B; and the angle A is smaller than the angle B.

2. A propeller transmission assembly with double protection according to claim 1, characterized in that: When the sub-transmission shaft sleeve (1) rotates in any direction, the maximum rotation angle of A is within a range of 8 to 16 degrees, and the maximum rotation angle of B is within a range of 16 to 32 degrees.

3. The propeller transmission assembly with double protection according to claim 1, characterized in that: The cross-sectional shapes of each of the first transmission protrusions (131) and each of the second transmission protrusions (132) include an isosceles trapezoid, a rectangle and a square.

4. A propeller transmission assembly with double protection according to claim 3, characterized in that: Each of the first transmission protrusions (131) comprises two symmetrically distributed first side surfaces (1311), and each of the second transmission protrusions (132) comprises two symmetrically distributed second side surfaces (1321); Each of the first transmission grooves (221) comprises two symmetrically distributed first transmission surfaces (2211), and each of the second transmission grooves (222) comprises two symmetrically distributed second transmission surfaces (2221); When each of the first transmission protrusions (131) is rotated to abut against the groove body of each of the first transmission grooves (221), each of the first transmission surfaces (2211) on the same side is respectively fitted with each of the second transmission surfaces (2221) on the same side; when each of the second transmission protrusions (132) is rotated to abut against the groove body of each of the second transmission grooves (222), each of the second transmission surfaces (2221) on the same side is respectively fitted with each of the second transmission surfaces (2221) on the same side.

5. The propeller transmission assembly with double protection according to claim 1, characterized in that: Each of the first transmission cams (131) and each of the second transmission cams (132) have the same shape and structure, and the distance between each of the first transmission cams (131) and each of the two adjacent second transmission cams (132) is the same.

6. The propeller transmission assembly with double protection according to claim 1, characterized in that: Each of the first transmission lugs (131) includes two to six, and each of the second transmission lugs (132) includes two to six.

7. The propeller transmission assembly with double protection according to claim 1, characterized in that: The outer circumferential surface of the sub-transmission shaft sleeve (1) is wrapped with a rubber sleeve (3), and the rubber sleeve (3) wraps each of the first transmission cams (131) and each of the second transmission cams (132).

8. A propeller transmission assembly with double protection according to claim 7, characterized in that: The female transmission shaft sleeve (2) comprises a plurality of third transmission surfaces (223); when the sub-transmission shaft sleeve (1) is rotated and arranged at a middle position of the female transmission shaft sleeve (2), each of the third transmission surfaces (223) abuts against an outer peripheral surface of the rubber sleeve (3); and the arc diameter size of each of the third transmission surfaces (223) is the same as the diameter size of the rubber sleeve (3).

9. The propeller transmission assembly with double protection according to claim 1, characterized in that: The material used for the female transmission shaft sleeve (2) is a material with a honeycomb structure.

10. The propeller transmission assembly with double protection according to claim 1, characterized in that: A plurality of driving protrusions (111) are fixedly arranged on the inner circumferential surface of the sub-transmission shaft sleeve (1), and the driving protrusions (111) are evenly distributed around the circumference of the sub-transmission shaft sleeve (1).

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