Marine propeller

Abstract

The utility model relates to a ship thruster which comprises a machine shell, a propeller and a motor driving the propeller to rotate, and further comprises a planetary gear and an output shaft connected with the planetary gear, a partition block is arranged in the machine shell, and a first oil seal is arranged at the end of the partition block. The internal space of the machine shell is divided into two mutually sealed containing cavities through the first oil seal by the partition block, the motor and the planetary gear are located in the two containing cavities respectively, the motor is connected with the input end of the planetary gear, the output shaft is connected with the output end of the planetary gear, and the output shaft is connected with the propeller and drives the propeller to rotate. Compared with the prior art, the planetary gear serves as the transmission, and the planetary gear and the motor are integrated in the machine shell, so that the size of the propeller is greatly reduced; the two containing cavities are sealed through the first oil seal and the partition block, lubricating oil on the planetary gear is prevented from overflowing into the motor, and normal operation of the motor is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a marine propeller and belongs to the propeller technical field. BACKGROUND

[0002] The most common driving device for a ship sailing in water is a propeller type ship propeller, which mainly rotates a propeller shaft below the waterline at the stern of a ship by a main engine to suck water from the suction surface of the propeller blade and discharge it from the discharge surface, thereby pushing the ship forward by the reaction force of water. The propeller in the prior art is generally large in size, and the motor output shaft is directly connected to the corresponding transmission components, so that the overall size of the propeller is difficult to change, and when higher requirements are needed, the corresponding space on the ship must be left out to install the propeller.

[0003] In addition, considering that the ship propeller usually works underwater and is soaked in water for a long time, the sealing of the propeller is particularly important. Once the sealing of the propeller fails, external water can easily enter the interior of the propeller, causing the propeller to malfunction or even pose a danger. However, the sealing effect of the propeller in the prior art is poor, especially the sealing structure between the lead-out wire and the housing, which is not perfect enough, affecting the overall use reliability and safety of the propeller. SUMMARY

[0004] The utility model aims at the shortcomings of the prior art and provides a marine propeller with reduced size.

[0005] To achieve the purpose, the utility model adopts the technical scheme of:

[0006] A marine propeller includes a housing, a propeller, and a motor driving the rotation of the propeller, and further includes a planetary gear and an output shaft connected to the planetary gear. The interior of the housing is provided with a partition block, and the end of the partition block is provided with a first oil seal. The first oil seal divides the internal space of the housing into two mutually sealed accommodation cavities by the partition block. The motor and the planetary gear are respectively located in the two accommodation cavities. The motor is connected to the input end of the planetary gear, and the output shaft is connected to the output end of the planetary gear. The output shaft is connected to the propeller and drives the rotation of the propeller.

[0007] As a further optimization of the above technical solutions: the upper part of the shell is provided with a wiring drum, the wiring drum is provided with a wire outlet hole, the wire outlet hole is provided with a wire sheath, the three-phase wire and the signal wire are located in the wire sheath, the end of the wire sheath is integrally provided with a plug, the shell is provided with a wiring hole, the plug is inserted into the wiring hole and is pressed by the hole wall of the wiring hole, the wire sheath is further provided with a nut and a gasket, the gasket is located in the wiring hole, the threaded segment of the nut is inserted into the wiring hole, the nut is moved downward to press the gasket, so that the gasket contacts the plug and locks and presses the plug.

[0008] As a further optimization of the above technical solutions: the upper and lower surfaces of the plug and the wire sheath are provided with positioning steps, the positioning steps are inclined, the bottom surface of the gasket is inclined, the hole wall of the wiring hole is protruded inward to form a wiring protrusion, the top surface of the wiring protrusion is inclined, and the bottom surface of the gasket and the top surface of the wiring protrusion are in close contact with the positioning steps.

[0009] As a further optimization of the above technical solutions: the wire sheath is made of fluoroplastic.

[0010] As a further optimization of the above technical solutions: the planetary gear includes an inner ring gear, a sun gear and a plurality of planet gears, the plurality of planet gears are engaged with the inner periphery of the inner ring gear, the sun gear is located at the center of the inner ring gear and is engaged with all the planet gears, the motor includes a motor shaft, the sun gear is sleeved and fixed on the motor shaft, the outer periphery of the inner ring gear is fixed in the shell, the planetary gear further includes a first planet carrier and a second planet carrier located on both sides of the sun gear, the planet gears are provided with planet shafts, the first planet carrier and the second planet carrier are provided with through holes corresponding to the planet shafts, the two ends of the planet shafts are located in the through holes of the first planet carrier and the second planet carrier respectively, the second planet carrier is sleeved and fixed on the output shaft, the motor drives the sun gear to rotate through the motor shaft, the rotation of the sun gear is transmitted to the planet gears to make the planet gears revolve, at the same time, the inner ring gear makes the planet gears rotate around the planet shafts, and the revolution of the planet gears drives the second planet carrier to rotate, thereby driving the output shaft and the propeller to rotate.

[0011] As a further optimization of the above technical solutions: the second planet carrier is provided with a plurality of planet carrier protrusions located in the inner ring gear and between adjacent planet gears, and screws pass through the planet carrier protrusions and are fixed on the first planet carrier, so that the first planet carrier and the second planet carrier rotate synchronously.

[0012] As a further optimization of the above technical solution: a first bearing is sleeved on the motor shaft, the first oil seal is sleeved on the motor shaft, a mounting flange is formed on the first planetary carrier, a second bearing is sleeved on the mounting flange, and the outer peripheral surfaces of the first bearing, the first oil seal and the second bearing are all in contact with the partition block.

[0013] As a further optimization of the above technical solution: an automotive-grade rotating transformer is provided at the end of the motor shaft.

[0014] As a further optimization of the above technical solution: a gear end cover and a motor end cover are respectively installed at both ends of the casing, the end of the output shaft passes through the gear end cover and is sleeved with a propeller, the end of the output shaft is threadedly installed with a nut, a protruding step is provided on the output shaft, the propeller is located between the nut and the step, a third bearing and two second oil seals are sleeved on the output shaft, and the outer circumferential surfaces of the third bearing and the two second oil seals are in contact with the inner circumferential surface of the gear end cover.

[0015] As a further optimization of the above technical solution: a propeller shroud is also installed on the gear end cover, and the propeller is located inside the propeller shroud.

[0016] Compared with the existing technology, the utility model uses the planetary gear as a transmission and integrates it with the motor in the casing, eliminating the space occupied by the additional assembly of the gearbox and greatly reducing the volume of the propeller; the first oil seal and the separator block realize the sealing of the two accommodating cavities, preventing the lubricating oil on the planetary gear from overflowing into the motor, and also preventing a large amount of iron filings powder generated by the wear of the planetary gear from entering the motor with the oil, thereby ensuring the normal operation of the motor; the nut moves down to squeeze the gasket, so that the gasket contacts the plug and locks and squeezes the plug, and the plug ensures the sealing of the wiring hole to obtain better waterproof performance; the wire sheath is made of fluoroplastic, which has excellent corrosion resistance and can be immersed in seawater for a long time. The wire can be directly led out to the hull; an automotive-grade rotary transformer is used instead of the existing commonly used traditional magnetic encoder. The automotive-grade rotary transformer has a simple structure, no complex electronic components, high reliability, strong anti-interference ability, can operate at higher temperatures, is suitable for extreme environments, has high resolution, and fast response speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the cross-sectional structure of the present utility model.

[0018] Figure 2 yes Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0019] Figure 3 It is a schematic diagram of the exploded structure of the planetary gear in the utility model. DETAILED DESCRIPTION

[0020] The utility model will be further explained below in combination with the drawings and specific embodiments. As shown in the drawings, Figures 1-3 A marine propeller includes a casing 1, a propeller 2, and a motor 4 driving the propeller 2 to rotate, and further includes a planetary gear 3 connecting the motor 4 and the propeller 2 respectively, and an output shaft 5 connected with the planetary gear 3. The inside of the casing 1 is provided with a partition block 11, and the end of the partition block 11 is provided with a first oil seal 12. The first oil seal 12 divides the inside space of the casing 1 into two mutually sealed containing cavities by the partition block 11, and the motor 4 and the planetary gear 3 are respectively located in the two containing cavities. The motor 4 is connected with the input end of the planetary gear 3, the output shaft 5 is connected with the output end of the planetary gear 3, and the output shaft 5 is connected with the propeller 2 and drives the propeller 2 to rotate. The first oil seal 12 and the partition block 11 realize the sealing of the two containing cavities, prevent the lubricating oil on the planetary gear 3 from overflowing into the motor 4, and also prevent a large amount of iron filings powder generated by the wear of the planetary gear 3 from entering the motor 4 with the oil, thereby ensuring the normal operation of the motor 4.

[0021] In the above technical solution: the planetary gear 3 includes an inner ring gear 31, a sun gear 32, and a plurality of planet gears 33, the plurality of planet gears 33 are engaged with the inner periphery of the inner ring gear 31, and the sun gear 32 is located at the center of the inner ring gear 31 and is engaged with all the planet gears 33. The motor 4 includes a motor shaft 41, the sun gear 32 in the planetary gear 3 is sleeved and fixed on the motor shaft 41, and the outer periphery of the inner ring gear 31 is fixed in the casing 1. The planetary gear 3 further includes a first planet carrier 34 and a second planet carrier 35 located on both sides of the sun gear 32. The planet gears 33 are provided with planet shafts 36, and the first planet carrier 34 and the second planet carrier 35 are both provided with through holes corresponding to the planet shafts 36, and the two ends of the planet shafts 36 are located in the through holes of the first planet carrier 34 and the second planet carrier 35 respectively. The second planet carrier 35 is sleeved and fixed on the output shaft 5. The motor 4 drives the sun gear 32 to rotate through the motor shaft 41, the rotation of the sun gear 32 is transmitted to the planet gears 33 to make the planet gears 33 revolve, and the inner ring gear 31 makes the planet gears 33 rotate around the planet shafts 36, and the revolution of the planet gears 33 drives the second planet carrier 35 to rotate, thereby driving the output shaft 5 and the propeller 2 to rotate. The second planet carrier 35 is provided with a plurality of planet carrier protrusions 37 located in the inner ring gear 31 and between adjacent planet gears 33, and screws pass through the planet carrier protrusions 37 and are fixed on the first planet carrier 34, so that the first planet carrier 34 and the second planet carrier 35 rotate synchronously.

[0022] In the above technical solution: the motor shaft 41 is sleeved with a first bearing 13, the first oil seal 12 is sleeved on the motor shaft 41, the first planet carrier 34 is provided with a mounting protrusion, the mounting protrusion is sleeved with a second bearing 38, and the outer peripheries of the first bearing 13, the first oil seal 12, and the second bearing 38 are in contact with the partition block 11.

[0023] In the above technical solution: a wiring barrel 6 is installed above the casing 1, and a wire outlet hole 61 is provided in the wiring barrel 6. A wire sheath 7 is passed through the wire outlet hole 61, and the three-phase line and the signal line are all located in the wire sheath 7 to realize integrated outlet. A plug 71 is integrally formed at the end of the wire sheath 7, and a wiring hole is formed on the casing 1. The plug 71 is inserted into the wiring hole and squeezed by the hole wall of the wiring hole. A nut 72 and a gasket 73 are also sleeved on the wire sheath 7. The gasket 73 is located in the wiring hole, and the threaded section of the nut 72 is inserted into the wiring hole. The nut 72 moves down to squeeze the gasket 73, so that the gasket 73 contacts the plug 71 and locks and squeezes the plug. The plug ensures the sealing of the wiring hole to obtain better waterproof performance. When the bottom surface of the nut 72 cap contacts the top surface of the casing 1, the nut 72 stops moving down.

[0024] In the above technical solution, positioning steps 74 are formed between the upper and lower surfaces of the plug 71 and the wire sheath 7. The positioning steps 74 are inclined, and the bottom surface of the corresponding gasket 73 is inclined. The hole wall of the wiring hole protrudes inward to form a wiring bump. The top surface of the wiring bump is inclined. The bottom surface of the gasket 73 and the top surface of the wiring bump are both in close contact with the positioning steps 74, which improves the sealing effect of the plug 71. The wire sheath 7 is made of fluoroplastic, which has excellent corrosion resistance and can be immersed in seawater for a long time. The wires can be directly led out to the hull.

[0025] In the above technical solution, a gear end cover 8 and a motor end cover are respectively mounted on both ends of the housing 1. The end of the output shaft 5 passes through the gear end cover 8 and is fitted with a propeller 2. A nut 53 is threadedly mounted on the end of the output shaft 5. The output shaft 5 is provided with a protruding step, and the propeller 2 is located between the nut 53 and the step. A third bearing 51 and two second oil seals 52 are mounted on the output shaft 5. The outer circumferences of the third bearing 51 and the two second oil seals 52 are in contact with the inner circumference of the gear end cover 8. The provision of two second oil seals 52 improves sealing reliability. A propeller shroud 10 is also mounted on the gear end cover 8, and the propeller 2 is located within the propeller shroud 10.

[0026] In the above technical solution, an automotive-grade resolver 9 is installed at the end of motor shaft 41. This resolver can be purchased directly from the market. This resolver replaces the commonly used traditional magnetic encoder. The resolver has a simple structure, lacks complex electronic components, and offers high reliability, strong anti-interference capabilities, and can operate at higher temperatures, making it suitable for extreme environments. It also features high resolution and a fast response speed.

[0027] When the output torque and rotation speed need to be adjusted, the gear end cover 8 is removed from the end of the casing 1 to see the planetary gear 3, then the output shaft 5 can be removed to replace the planetary gear 3, or only the sun gear 32 and the planetary gear 33 are adjusted, the planetary gear 3 is used as a transmission, and is integrated with the motor 4 in the casing 1, the space occupied by the additional assembly of the transmission is saved, and the volume of the propeller is greatly reduced.

[0028] The preferred embodiments of the present application are described in detail above. It should be understood that those skilled in the art can make many modifications and changes without creative labor according to the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment on the basis of the existing technology according to the concept of the present application shall fall within the protection scope of the present application.

Claims

1. A marine propeller, comprising a housing (1), a propeller (2) and a motor (4) for driving the propeller (2) to rotate, characterized in that The invention also includes a planetary gear (3) and an output shaft (5) connected to the planetary gear (3). A partition block (11) is provided inside the housing (1). A first oil seal (12) is provided at the end of the partition block (11). The first oil seal (12) separates the internal space of the housing (1) into two mutually sealed accommodating cavities by the partition block (11). The motor (4) and the planetary gear (3) are respectively located in the two accommodating cavities. The motor (4) is connected to the input end of the planetary gear (3). The output shaft (5) is connected to the output end of the planetary gear (3). The output shaft (5) is connected to the propeller (2) and drives the propeller (2) to rotate.

2. A marine propeller according to claim 1, characterized in that A wiring barrel (6) is installed above the housing (1), and a wire outlet hole (61) is provided in the wiring barrel (6). A wire sheath (7) is passed through the wire outlet hole (61), and the three-phase line and the signal line are both located in the wire sheath (7). A plug (71) is integrally formed at the end of the wire sheath (7). A wiring hole is formed on the housing (1), and the plug (71) is inserted into the wiring hole and squeezed by the hole wall of the wiring hole. A nut (72) and a gasket (73) are also sleeved on the wire sheath (7), and the gasket (73) is located in the wiring hole. The threaded section of the nut (72) is inserted into the wiring hole, and the nut (72) moves downward to squeeze the gasket (73), so that the gasket (73) contacts the plug (71) and locks and squeezes the plug (71).

3. A marine propeller according to claim 2, characterized in that Positioning steps (74) are formed between the upper and lower surfaces of the plug (71) and the wire sheath (7), and the positioning steps (74) are inclined. The bottom surface of the corresponding gasket (73) is inclined. The hole wall of the wiring hole protrudes inward to form a wiring protrusion. The top surface of the wiring protrusion is inclined. The bottom surface of the gasket (73) and the top surface of the wiring protrusion are both in close contact with the positioning steps (74).

4. A marine propeller according to claim 2, characterized in that The wire sheath (7) is made of fluoroplastic.

5. A marine propeller according to claim 1, characterized in that The planetary gear (3) includes an inner gear ring (31), a sun gear (32) and a plurality of planetary gears (33), wherein the plurality of planetary gears (33) are meshed with the inner circumference of the inner gear ring (31), the sun gear (32) is located at the center of the inner gear ring (31) and is meshed with all the planetary gears (33), the motor (4) includes a motor shaft (41), the sun gear (32) is sleeved and fixed on the motor shaft (41), the outer circumference of the inner gear ring (31) is fixed in the housing (1), the planetary gear (3) also includes a first planetary carrier (34) and a second planetary carrier (35) located on both sides of the sun gear (32), a planetary shaft (36) is passed through the planetary gear (33), the first planetary carrier (34) and the second planetary carrier (35) are connected to each other. The planet carriers (35) are each provided with through holes corresponding to the planet shafts (36). The two ends of the planet shafts (36) are respectively located in the through holes of the first planet carrier (34) and the second planet carrier (35). The second planet carrier (35) is sleeved and fixed on the output shaft (5). The motor (4) drives the sun gear (32) to rotate through the motor shaft (41). The rotation of the sun gear (32) is transmitted to the planet gear (33), causing the planet gear (33) to revolve. At the same time, the inner gear ring (31) causes the planet gear (33) to rotate around the planet shaft (36). The revolution of the planet gear (33) drives the second planet carrier (35) to rotate, thereby driving the output shaft (5) and the propeller (2) to rotate.

6. A marine propeller according to claim 5, characterized in that The second planet carrier (35) is provided with a plurality of planet carrier protrusions (37), the planet carrier protrusions (37) are located in the inner gear ring (31) and between two adjacent planetary gears (33), and screws pass through the planet carrier protrusions (37) and are fixed to the first planet carrier (34), so that the first planet carrier (34) and the second planet carrier (35) rotate synchronously.

7. A marine propeller according to claim 5, characterized in that The motor shaft (41) is sleeved with a first bearing (13), the first oil seal (12) is sleeved on the motor shaft (41), the first planetary carrier (34) is formed with a mounting flange, the mounting flange is sleeved with a second bearing (38), and the outer peripheral surfaces of the first bearing (13), the first oil seal (12) and the second bearing (38) are all in contact with the partition block (11).

8. A marine propeller according to claim 5, characterized in that An automotive-grade rotary transformer (9) is provided at the end of the motor shaft (41).

9. A marine propeller according to claim 1, characterized in that A gear end cover (8) and a motor end cover are respectively installed at both ends of the casing (1); the end of the output shaft (5) passes through the gear end cover (8) and is sleeved with a propeller (2); a nut (53) is threadedly installed at the end of the output shaft (5); a protruding step is provided on the output shaft (5); the propeller (2) is located between the nut (53) and the step; a third bearing (51) and two second oil seals (52) are sleeved on the output shaft (5); the outer circumferential surfaces of the third bearing (51) and the two second oil seals (52) are in contact with the inner circumferential surface of the gear end cover (8).

10. A marine propeller according to claim 9, characterized in that A propeller shroud (10) is also mounted on the gear end cover (8), and the propeller (2) is located inside the propeller shroud (10).

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