Shaftless propeller

Abstract

The utility model discloses a shaftless propeller which comprises a shell cover, a propelling assembly, a shell, a sealing piece and a sealing cover. A motor outputs a gear to rotate to drive a driven gear ring to rotate, the driven gear ring drives a rotating shaft to rotate, and blades on the inner wall of the rotating shaft rotate to enable water flow to surge through a duct, so that the propeller has certain thrust; shaftless transmission is achieved, and winding of aquatic plants and sundries in water is avoided; the shaftless propeller is compact in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to the field of underwater thrusters, in particular to a shaftless thruster Background Art

[0002] The structure of traditional thrusters mainly consists of a motor, a transmission shaft, a propeller and related support and sealing devices. The motor transmits power to the propeller through the transmission shaft. The design of this structure is simple and mature, and is widely used in various ships and submersibles. Due to the existence of the rotating shaft, when a ship sails in an area with dense waterweeds, the waterweeds are easily wound around the transmission shaft. As the rotating shaft rotates, the waterweeds may become more and more tightly wound, eventually resulting in an increase in the resistance of the shafting, and even may cause the shafting to be stuck or damaged. Once the shafting is wound, it will not only reduce the propulsion efficiency, but may also cause the motor to be overloaded, thus triggering electrical failures

[0003] To solve this problem, a shaftless propeller thruster based on the principle of an inner rotor motor has emerged. The shaftless propeller thruster consists of a coil, an impeller disc, windings, magnets and blades. The coil is arranged at the outer position of the frame. After being powered on, the windings generate an electromagnetic field to drive the impeller disc to rotate and drive the blades to propel. This design eliminates the transmission shaft of the traditional thruster and realizes many advantages such as efficient anti-winding and direct drive. Although the shaftless propeller reduces mechanical transmission in terms of structure, the complexity of the electromagnetic system increases the manufacturing and maintenance costs Content of the Utility Model

[0004] The purpose of the utility model is to solve the technical problems put forward in the above background art, and provide a shaftless thruster including a housing cover, a propulsion component, a housing, a seal and a cover

[0005] The housing cover is used to cooperate with the housing to form a sealed space

[0006] The propulsion component includes the rotating shaft, which is a hollow stepped shaft; blades are arranged inside the rotating shaft; a bearing is sleeved on each side of the rotating shaft; the other side of the bearing is limited by the inner retaining ring; the driven gear ring is sleeved outside the inner retaining ring; the outer ring of the bearing is sleeved in the center of the mounting base; the outer retaining ring is arranged inside both sides of the mounting base; a motor support is fixed at the upper end of the mounting base; the side of the motor support is U-shaped; a motor is installed inside the motor support; the outer rotor of the motor passes through one side of the end of the motor support and is fixed to the gear through a coupling; a small bearing is sleeved on the coupling, and one end is close to the shaft shoulder of the coupling; the bearing retaining ring is sleeved on one side of the above small bearing

[0007] The seal is located inside the cover; the cover is respectively installed on one side of the housing cover and the housing

[0008] Among them, a waterproof interface is provided at the top of the housing; mounting bumps are provided on the outer side of the housing; side fixing protrusions are provided on each of the inclined surfaces on both sides of the housing; and a plurality of mounting docking blocks are provided on the inner circumference of the housing.

[0009] Among them, the bearing and the small bearing adopt the deep groove ball bearing series.

[0010] Among them, the seal adopts a double-lip oil seal; the seal and the rotating shaft form a dynamic seal.

[0011] Among them, the driven gear ring and the gear adopt helical gear meshing transmission.

[0012] Among them, an O-ring is provided between the housing cover and the housing.

[0013] The beneficial effects brought by the present utility model are as follows:

[0014] The shaftless thruster of the present application uses the output of the motor to drive the gear to rotate, which in turn drives the driven gear ring to rotate. The driven gear ring drives the rotating shaft to rotate, and the blades on the inner wall of the rotating shaft rotate to make the water flow through the duct, enabling the thruster to have a certain thrust; achieving shaftless transmission and avoiding entanglement of waterweeds and sundries in the water; the shaftless thruster of the present application has a compact structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of the shaftless thruster of the present utility model;

[0016] Figure 2 is an exploded view of the shaftless thruster of the present utility model;

[0017] Figure 3 is a lower partial cross-sectional view of the shaftless thruster of the present utility model;

[0018] Figure 4 is a perspective view of the propulsion assembly of the present utility model;

[0019] Figure 5 is a schematic cross-sectional installation view of the motor and the gear of the present utility model;

[0020] Figure 6 is a perspective view of the housing of the present utility model.

[0021] In the figure, 1. housing cover; 2. propulsion assembly; 3. housing; 4. seal; 5. cover;

[0022] 21. rotating shaft; 22. blade; 23. inner retaining ring; 24. bearing; 25. driven gear ring; 26. mounting base; 27. outer retaining ring; 28. motor support; 29. motor; 210. coupling; 211. bearing retaining ring; 212. small bearing; 213. gear;

[0023] 31. Waterproof interface; 32. Installation bump; 33. Side fixing protrusion; 34. Installation docking block. Specific implementation manner

[0024] To make the purpose, technical solution and advantages of the implementation of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be described in more detail below in conjunction with the accompanying drawings in the embodiments of the present utility model. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The described embodiments are some, but not all, of the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present utility model and should not be construed as limiting the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model. The embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.

[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of the present utility model.

[0026] The present utility model will be specifically described below in conjunction with the accompanying drawings, as Figure 1 and Figure 2 shown, a shaftless thruster includes a housing cover 1, a propulsion assembly 2, a housing 3, a seal 4 and a cover 5;

[0027] As Figure 1 shown, the housing cover 1 is used to cooperate with the housing 3 to form a sealed space;

[0028] As Figure 2 , Figure 3 , Figure 4 and Figure 5 shown:

[0029] The propulsion component 2 includes the rotating shaft 21, which is a hollow stepped shaft; a blade 22 is provided inside the rotating shaft 21; the blade can be provided with two to four blades; a bearing 24 is sleeved on each side of the rotating shaft 21; the other side of the bearing 24 is limited by the inner retaining ring 23; for limiting the axial movement of the bearing; the driven gear ring 25 is sleeved on the outside of the inner retaining ring 23; the outer ring of the bearing 24 is sleeved on the center of the mounting base 26; the outer retaining ring 27 is arranged inside both sides of the mounting base 26; a motor support 28 is fixed on the upper end of the mounting base 26; the side of the motor support 28 is U-shaped; a motor 29 is installed inside the motor support 28, and the motor 29 is a brushless motor, and the forward and backward movement of the thruster can be realized by reversing the circuit connection; the outer rotor of the motor 29 passes through the side of the motor support 28 and is fixed to the gear 213 through the coupler 210; the small bearing 212 is sleeved on the coupler 210, and one end abuts against the shoulder of the coupler 210; the bearing retaining ring 211 is sleeved on one side of the above-mentioned small bearing 212.

[0030] As Figure 2 shown, the seal 4 is located inside the cover 5; the cover 5 is respectively installed on one side of the housing cover 1 and the housing 3.

[0031] As Figure 6 shown, a waterproof interface 31 is provided at the top of the housing; mounting bumps 32 are provided on the outer side of the housing for mounting on the operating rod; side fixing protrusions 33 are provided on the inclined surfaces on both sides of the housing 3, which is convenient for the shaftless thruster to be fixedly installed on the outer wall surface of the ship; a plurality of mounting docking blocks 34 are provided on the inner side of the housing 3 in a circle for fixing the mounting base 26 and the cover 5 to the housing 3.

[0032] The bearing 24 and the small bearing 212 adopt the deep groove ball bearing series, and the bearing 24 and the small bearing 212 are made of ceramic material or plastic material with waterproof ability.

[0033] As Figure 2 shown, the seal 4 adopts a double-lip oil seal; the seal 4 and the rotating shaft 21 form a dynamic seal.

[0034] As Figure 2 and Figure 3 shown, the driven gear ring 25 and the gear 213 adopt helical gear meshing transmission.

[0035] As Figure 2 shown, an O-ring is provided between the housing cover 1 and the housing 3.

[0036] In summary, the shaftless thruster of the present application uses the output of the motor 29 to rotate the gear 213, which drives the rotation of the driven gear ring 25. The driven gear ring 25 drives the rotation of the rotating shaft 21, and the blades 22 on the inner wall of the rotating shaft 21 rotate to make the water flow through the duct, enabling the thruster to have a certain thrust; achieving shaftless transmission and avoiding entanglement of waterweeds and sundries in the water; the shaftless thruster of the present application has a compact structure and low cost.

[0037] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present utility model. Some changes that those skilled in the art may make to some parts thereof all reflect the principles of the present utility model and fall within the protection scope of the present utility model.

Claims

1. A shaftless propeller, characterized in that: Includes housing cover, propulsion assembly, housing, seal and cover; The housing cover is used to cooperate with the housing to form a sealed space; The propulsion assembly includes a rotating shaft in the form of a hollow stepped shaft; blades are provided inside the rotating shaft; a bearing is sleeved on each side of the rotating shaft; the other side of the bearing is limited by an inner retaining ring; the driven gear ring is sleeved on the outside of the inner retaining ring; the outer ring of the bearing is sleeved on the center of the mounting base; the outer retaining ring is arranged on both sides of the mounting base; a motor support is fixed to the upper end of the mounting base; the side surface of the motor support is U-shaped; a motor is installed on the inside of the motor support; the outer rotor of the motor passes through the side surface of one end of the motor support and is fixed to the gear through a connector; a small bearing is sleeved on the coupling, and one end is close to the shaft shoulder of the connector; the bearing retaining ring is sleeved on one side of the above-mentioned small bearing; The sealing member is located in the sealing cover; the sealing cover is respectively arranged and installed on the shell cover and one side of the shell.

2. The shaftless propeller according to claim 1, characterized in that: The top of the shell is provided with a waterproof interface; the outer side of the shell is provided with a mounting protrusion; the inclined surfaces on both sides of the shell are respectively provided with a side fixing protrusion; and the inner side of the shell is provided with a plurality of mounting docking blocks around.

3. The shaftless propeller according to claim 1, characterized in that: The bearing and the small bearing are deep groove ball bearing series.

4. The shaftless propeller according to claim 1, characterized in that: The sealing element is a double-lip oil seal; the sealing element and the rotating shaft form a dynamic seal.

5. The shaftless propeller according to claim 1, characterized in that: The driven gear ring and the gear adopt helical tooth meshing transmission.

6. The shaftless propeller according to claim 1, characterized in that: An O-ring is provided between the housing cover and the housing.

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