Underwater propeller with double-propeller structure and two-stage speed reduction

Abstract

The utility model relates to an underwater thruster with a double-propeller structure and two-stage speed reduction, which comprises a first propeller and a second propeller, the first propeller and the second propeller are respectively connected with a first rotating shaft and a second rotating shaft, the first rotating shaft is connected with a first driven spiral bevel gear, and the second rotating shaft is connected with a second driven spiral bevel gear. The second rotating shaft is connected with a second driven spiral bevel gear, the first driven spiral bevel gear is meshed with a first driving spiral bevel gear, the first driving spiral bevel gear is connected with one end of a first auxiliary shaft, and the other end of the first auxiliary shaft is connected with a first driven cylindrical gear; the second driven spiral bevel gear is meshed with the second driving spiral bevel gear, the second driving spiral bevel gear is connected with one end of the second auxiliary shaft, the other end of the second auxiliary shaft is connected with the second driven cylindrical gear, and the first driven cylindrical gear and the second driven cylindrical gear are meshed with the driving cylindrical gear of the input shaft. The torque requirement on the motor and the engine is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to an underwater propeller with a double-screw structure and two-stage speed reduction. Background Art

[0002] Most of the existing outboard motors adopt a single propeller structure. The outboard motors with a single propeller structure can only increase the power output of the power machine or increase the propeller blades to increase the horsepower output of the outboard motor.

[0003] After searching, the patent: A double-blade underwater propulsion device (CN202110625439.3), including a tubular shell with a hollow structure, a stator assembly fixed in the tubular shell, and a rotor assembly rotatably arranged in the tubular shell, the center of the rotor assembly has a rotating shaft, the front and rear ends of the tubular shell are respectively sealed with a front cover and a rear cover, the front cover and the rear cover are sealed and connected to the tubular shell, the front and rear ends of the rotating shaft are respectively passed through by the front cover and the rear cover, and the passing ends are fixed with propellers, the two ends of the rotating shaft are rotatably connected to the front and rear covers, a wire groove is provided above the tubular shell, and an outer end plate is sealed at the outer notch of the wire groove, and a plurality of wire holes connected to the inside of the tubular shell are provided in the wire groove, and the end of the power cord is connected to the wire groove and electrically connected to the stator assembly through the wire hole. The above-mentioned double-blade type is located on both sides, and this structure is relatively large, which is not conducive to the miniaturization of boats and outboard motors.

[0004] In view of the above-mentioned defects, the designers have actively carried out research and innovation in order to create a new type of underwater propeller with a double propeller structure and two-stage reduction, so as to make it more valuable for industrial use. Utility Model Content

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide an underwater propeller with a double propeller structure and two-stage reduction.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An underwater propeller with a double propeller structure and two-stage reduction comprises a first propeller and a second propeller, wherein the first propeller is connected to one end of a first rotating shaft, the second propeller is connected to one end of a second rotating shaft, the first rotating shaft is a rotating shaft with a hollow structure, and the first rotating shaft with a hollow structure is sleeved on the second rotating shaft, the other end of the first rotating shaft is connected to a first driven spiral bevel gear through a spline, the other end of the second rotating shaft is connected to a second driven spiral bevel gear through a spline, the first driven spiral bevel gear is meshed with a first active spiral bevel gear, the first active spiral bevel gear is connected to one end of a first countershaft through a spline, the other end of the first countershaft is connected to a first driven cylindrical gear, the second driven spiral bevel gear is meshed with a second active spiral bevel gear, the second active spiral bevel gear is connected to one end of a second countershaft through a spline, the other end of the second countershaft is connected to a second driven cylindrical gear, the first driven cylindrical gear and the second driven cylindrical gear are meshed with an active cylindrical gear of an input shaft, and the input shaft is connected to a driving device.

[0008] Preferably, in the underwater propeller with a double-propeller structure and a two-stage reduction gear, the first rotating shaft and the second rotating shaft are respectively connected to the first propeller and the second propeller through respective ball bearings.

[0009] Preferably, in the underwater propeller with a twin-propeller structure and a two-stage reduction gear, the first secondary shaft, the second secondary shaft and the input shaft are connected to the underwater housing through respective bearings.

[0010] Preferably, in the underwater propeller with a double-propeller structure and a two-stage reduction, the input shaft is connected to the driving device via a spline.

[0011] Preferably, in the underwater propeller with a double-propeller structure and a two-stage reduction gear, the driving device is a motor or an engine.

[0012] Preferably, in the underwater propeller with a double-propeller structure and a two-stage reduction gear, the first propeller and the second propeller are in a counter-rotating structure through their respective rotating shafts.

[0013] By means of the above solution, the utility model has at least the following advantages:

[0014] The utility model adopts a two-stage reduction mechanism, and the reduction ratio can be about twice that of a general outboard motor. The above structure can give full play to the advantages of the motor and the engine, and can work at a higher speed as needed, so that the motor and the engine can operate in the optimal output efficiency range, and the torque requirements for the motor and the engine are reduced, and the size of the motor and the engine is correspondingly reduced. The transmission is smoother, the noise is smaller, and the product life is longer.

[0015] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a cross-sectional view of AA of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0021] Example

[0022] like Figure 1 and Figure 2As shown, an underwater propeller with a double-screw structure and a two-stage reduction includes a first propeller 1 and a second propeller 2, wherein the first propeller 1 is connected to one end of a first rotating shaft 3, and the second propeller 2 is connected to one end of a second rotating shaft 4, the first rotating shaft 3 is a rotating shaft with a hollow structure, and the first rotating shaft 3 with a hollow structure is sleeved on the second rotating shaft 4, the other end of the first rotating shaft 3 is connected to a first driven spiral bevel gear 5 through a spline, and the other end of the second rotating shaft 4 is connected to a second driven spiral bevel gear 6 through a spline, and the first driven spiral bevel gear 5 is connected to the first active spiral bevel gear 6 through a spline. The first driving spiral bevel gear 7 is meshed with the bevel gear 7, the first driving spiral bevel gear 7 is connected to one end of the first countershaft 8 through a spline, the other end of the first countershaft 8 is connected to the first driven cylindrical gear 9, the second driven spiral bevel gear 6 is meshed with the second driving spiral bevel gear 10, the second driving spiral bevel gear 10 is connected to one end of the second countershaft 11 through a spline, the other end of the second countershaft 11 is connected to the second driven cylindrical gear 12, the first driven cylindrical gear 9 and the second driven cylindrical gear 12 are meshed with the driving cylindrical gear 13 of the input shaft, and the input shaft 14 is connected to the driving device.

[0023] In the present invention, the first rotating shaft 3 and the second rotating shaft 4 are respectively connected to the first propeller 1 and the second propeller 2 through respective ball bearings.

[0024] In the present invention, the first secondary shaft 8, the second secondary shaft 11 and the input shaft are connected to the underwater housing through respective bearings.

[0025] The input shaft in the utility model is connected to the driving device through a spline, wherein the driving device is a motor or an engine.

[0026] In the utility model, the first propeller 1 and the second propeller 2 are in a counter-rotating structure through their respective rotating shafts, and the torques generated on the transmission structure can partially offset each other, thereby reducing the noise, wear and short life of the transmission structure.

[0027] The working principle of the utility model is as follows:

[0028] During specific operation, the input shaft is driven by the driving device (motor) to rotate, and the rotation of the input shaft causes the driving cylindrical gear to rotate accordingly. The rotation of the driving cylindrical gear will drive the rotation of the first driven cylindrical gear and the second driven cylindrical gear, and their rotation will drive the rotation of the first driving spiral bevel gear and the second driving spiral bevel gear. The rotation of the first driving spiral bevel gear and the second driving spiral bevel gear will rotate with the first driven spiral bevel gear and the second driven spiral bevel gear respectively meshed with them, and then transmitted to the first rotating shaft and the second rotating shaft, and finally transmitted to the first propeller and the second propeller, so that they can achieve counter-rotation.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of this application, it should be noted that the terms "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or vertical, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as within the protection scope of the present invention.

Claims

1. An underwater propeller with a double propeller structure and two-stage reduction, characterized in that: The invention comprises a first propeller (1) and a second propeller (2), wherein the first propeller (1) is connected to one end of a first rotating shaft (3), and the second propeller (2) is connected to one end of a second rotating shaft (4); the first rotating shaft (3) is a rotating shaft with a hollow structure, and the first rotating shaft (3) with a hollow structure is sleeved on the second rotating shaft (4); the other end of the first rotating shaft (3) is connected to a first driven spiral bevel gear (5) through a spline, and the other end of the second rotating shaft (4) is connected to a second driven spiral bevel gear (6) through a spline; the first driven spiral bevel gear (5) is meshed with a first driving spiral bevel gear (7); The first driving spiral bevel gear (7) is connected to one end of the first secondary shaft (8) through a spline, the other end of the first secondary shaft (8) is connected to the first driven cylindrical gear (9), the second driven spiral bevel gear (6) is meshed with the second driving spiral bevel gear (10), the second driving spiral bevel gear (10) is connected to one end of the second secondary shaft (11) through a spline, the other end of the second secondary shaft (11) is connected to the second driven cylindrical gear (12), the first driven cylindrical gear (9) and the second driven cylindrical gear (12) are meshed with the driving cylindrical gear (13) of the input shaft, and the input shaft is connected to the driving device.

2. The underwater propeller with a double propeller structure and two-stage reduction according to claim 1, characterized in that: The first rotating shaft (3) and the second rotating shaft (4) are respectively connected to the first propeller (1) and the second propeller (2) via respective ball bearings.

3. The underwater propeller with a double propeller structure and two-stage speed reduction according to claim 1, characterized in that: The first secondary shaft (8), the second secondary shaft (11) and the input shaft are connected to the underwater housing via respective bearings.

4. The underwater propeller with a double propeller structure and two-stage reduction according to claim 1, characterized in that: The input shaft is connected to the driving device via a spline.

5. An underwater propeller with a double propeller structure and two-stage reduction according to claim 1 or 4, characterized in that: The driving device is a motor or an engine.

6. The underwater propeller with a double propeller structure and two-stage reduction according to claim 1, characterized in that: The first propeller (1) and the second propeller (2) are in a counter-rotating structure via their respective rotating shafts.

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