An automatically elevating propeller

Abstract

The utility model provides an automatic lifting propeller, including propeller body and the main shaft of connecting propeller body, it is characterized by: the lifting device of automatic up and down movement of propeller body is arranged on the main shaft, the lifting device includes rotating clamping mechanism, including at least a pair of opposite rotatable and can hold the roller assembly of main shaft, and each roller assembly includes friction wheel and clamping mechanism, and the friction wheel is in rolling contact with the main shaft, and the clamping mechanism makes the friction wheel have the tendency of always being in contact with the main shaft, gear transmission mechanism is used for driving the rotation of the friction wheel, the utility model has the advantages of: the rotation of the friction wheel is driven through the gear transmission mode, thereby realizes the automatic lifting of propeller main shaft and the lowering action, not only improves the work efficiency, and can realize more accurate lifting height control, and the adjustment is more flexible and reliable.

Description

Technical Field

[0001] This utility model relates to a marine propulsion device, and more particularly to an automatically lifting and lowering propeller. Background Technology

[0002] A ship's propulsion system is a driving device that propels a ship through water. It converts the power generated by the engine into thrust to overcome the resistance of the water and propel the ship forward. There are many types of ship propulsion systems, which can be classified according to their operating principles, such as propellers, waterjet propulsion systems, and special-purpose propulsion systems. The propulsion system provides the power for the ship to move forward, while the steering system can change the direction of the ship's movement and can be linked with the propulsion system to achieve control.

[0003] In actual use of ships, as the ship's load changes, the hull's draft will also change, and correspondingly, the immersion depth of the propeller in the water will also change. If the immersion depth of the propulsion mechanism is not adjusted in time, it is easy for the propeller to emerge from the water or hit the bottom, thereby causing damage to the propeller.

[0004] In existing technologies, such as the utility model "Marine Disc Propeller" with patent number ZL03248555.7, it mainly includes a transmission device and a propeller. The propeller is a disc propeller, consisting of a rotating cylinder concentrically mounted inside a cylindrical outer shell. The two cylinders are connected at the front and rear ends via front and rear bearings, respectively. Several main blades are fixedly spaced along the circumference of the inner wall of the rotating cylinder, and the main blades are inclined from the circumference towards the center in two spatial directions. The disc propeller is connected to the transmission device via a movable coupling; or to a rotatable, oscillating power head. The propeller in the aforementioned patent only drives the disc propeller to rise and fall by manually pulling the power transmission box or the power head motor, resulting in low working efficiency.

[0005] In summary, propellers currently used on small vessels are generally fixed-mounted and cannot be adjusted for different immersion depths. Changing the immersion depth requires manual disassembly and raising / lowering of the propeller, which is not only inaccurate but also inconvenient for the user. Therefore, further improvements and refinements are needed to address the problems with the aforementioned propeller lifting mechanisms. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a simple, compact, and easy-to-install automatic lifting propeller, which is in response to the above-mentioned existing technology.

[0007] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an automatic lifting thruster, comprising a thruster body and a main shaft connected to the thruster body, characterized in that: a lifting device is provided on the main shaft to drive the thruster body to move automatically up and down, the lifting device comprising:

[0008] A rotary clamping mechanism includes at least one pair of roller assemblies that can rotate relative to each other and clamp a spindle. Each roller assembly includes a friction wheel and a clamping mechanism. The friction wheel is in rolling contact with the spindle, and the clamping mechanism makes the friction wheel tend to always be in contact with the spindle.

[0009] A gear transmission mechanism is used to drive the rotation of the friction wheel.

[0010] To facilitate installation and improve connection reliability, the roller assembly preferably includes a roller and a bushing. The output end of the gear transmission mechanism is fixedly connected to the roller. A bushing that can rotate with the roller is fitted on the roller. The clamping mechanism is located inside the bushing. The friction wheel is located outside the bushing and is tightly fitted with the bushing.

[0011] To achieve axial positioning and movement as well as radial rotation, as a further preferred embodiment, the roller is configured as stepped shafts at both ends, with limit nuts provided on the stepped shafts. One end of the bushing abuts against the limit nut, while the other end can move linearly along the axial direction of the roller.

[0012] To facilitate the assembly and connection of the bushing and the roller, preferably, the bushing has a first stepped hole, and the small neck of the first stepped hole has a radially recessed slot. Correspondingly, the roller has a pin hole in the radial direction. The roller and the bushing are connected by a pin that passes through the pin hole and is engaged in the slot. The clamping mechanism is provided in the large neck of the first stepped hole.

[0013] To simplify the structure and facilitate installation and replacement, the clamping mechanism is preferably a spring, with one end of the spring abutting against the limiting nut and the other end abutting against the stepped surface of the first stepped hole.

[0014] To achieve positioning of one end of the spring, preferably, the clamping mechanism is a spring, with one end of the spring abutting against the limiting nut and the other end abutting against the stepped surface of the first stepped hole.

[0015] To enhance the clamping force on the spindle and prevent it from slipping when stopped, while ensuring the rotatability of the friction wheel, preferably, the friction wheel includes an integrally formed sleeve and a conical head. Each roller assembly includes two friction wheels with two conical heads facing each other and spaced apart. Each friction wheel is provided with the clamping mechanism, and the spindle abuts against the outer wall of the conical head of each friction wheel.

[0016] To further improve friction, as a further preferred option, the roller assembly preferably has two pairs, which are arranged vertically and vertically at intervals along the axial direction of the main shaft.

[0017] To achieve power transmission and simplify the structural design, making the equipment structure more compact, the gear transmission mechanism preferably includes a driving wheel and at least one driven wheel that meshes with the driving wheel. Each driven wheel meshes with a transmission wheel, and the output end of the driven wheel and the output end of the transmission wheel meshing with it are respectively connected to a pair of roller assemblies. The number of driven wheels is adapted to the number of pairs of roller assemblies.

[0018] To ensure reliable transmission of gear power, preferably, the roller assembly further includes a roller that can drive the friction wheel to rotate together. The driven wheel and the transmission wheel are respectively connected to the roller of the corresponding roller assembly via a transmission shaft. One end of the transmission shaft is provided with a keyway, and the driven wheel and the transmission wheel are respectively connected to the transmission shaft via flat keys that can be embedded in the keyway. The other end of the transmission shaft has two symmetrically arranged U-shaped grooves along the axial direction on its side wall. The connecting end of the roller is provided with a through hole along the radial direction. The roller and the transmission shaft are connected by a locating pin that passes through the through hole and the two U-shaped grooves.

[0019] Compared with the prior art, the advantages of this utility model are: by using gear transmission to drive the rotation of the friction wheel, the automatic raising and lowering of the propeller main shaft is realized. Compared with the existing technology, which can only manually disassemble and raise or lower the propeller (i.e., raise and lower the main shaft), this not only greatly improves work efficiency and makes it more convenient to use, but also enables more precise control of the lifting height, and the adjustment is more flexible and reliable. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the installation of the lifting assembly on a ship propeller according to an embodiment of the present invention.

[0021] Figure 2 This is a three-dimensional structural diagram of the lifting component according to an embodiment of the present utility model.

[0022] Figure 3 This is a partial structural diagram of the lifting assembly according to an embodiment of the present utility model.

[0023] Figure 4 This is a partial cross-sectional view of the lifting assembly according to an embodiment of the present utility model.

[0024] Figure 5 This is an exploded perspective view of the rotating clamping mechanism in the lifting assembly of this utility model embodiment.

[0025] Figure 6This is a three-dimensional assembly diagram of the rotating clamping mechanism in the lifting assembly of this utility model embodiment.

[0026] Figure 7 This is a three-dimensional structural diagram of the bushing in the rotating clamping mechanism of this utility model embodiment.

[0027] Figure 8 This is a schematic diagram showing the rotation direction of the gear transmission mechanism in the lifting assembly of this utility model embodiment. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] This embodiment relates to a ship propulsion system, such as... Figure 1 As shown, a ship propulsion system typically includes a propulsion body 91 and a main shaft 1 connected to the propulsion body 91. The main shaft 1 is equipped with a steering device 92 that can control the propulsion to change direction and a lifting device 93 that can drive the main shaft 1 to rise and fall.

[0030] like Figures 2-8 As shown, the lifting device 93 of the ship propeller in this embodiment is a lifting device 93 that can drive the propeller body 91 to move up and down automatically. It includes a rotating clamping mechanism 2 and a gear transmission mechanism 3. The rotating clamping mechanism 2 includes at least one pair (i.e. two) of roller assemblies 4 that can rotate relative to each other and clamp the main shaft 1. Each roller assembly 4 includes a friction wheel 42 and a clamping mechanism. The friction wheel 42 is in rolling contact with the main shaft 1, and the clamping mechanism makes the friction wheel 42 tend to always be in contact with the main shaft 1. The gear transmission mechanism 3 is used to drive the rotation of the friction wheel 42.

[0031] like Figure 2-3 As shown, in order to increase friction and further improve the clamping reliability of the main shaft 1, the roller assembly 4 in this embodiment is provided with two pairs, which are respectively arranged vertically and vertically along the axial direction of the main shaft 1.

[0032] Each roller assembly 4 includes a roller 41, two friction wheels 42 spaced apart on the roller 41, and a bushing 43 disposed between the roller 41 and each friction wheel 42. The output end of the gear transmission mechanism 3 is fixedly connected to the roller 41. A clamping mechanism is disposed inside the bushing 43. The friction wheel 42 is sleeved outside the bushing 43. The outer side of the bushing 43 forms a T-shaped cross section. Correspondingly, the friction wheel 42 has a second stepped hole that can be adapted to the outer contour shape of the bushing 43 and is tightly fitted with the bushing 43. The roller 41 can drive the friction wheel 42 and the bushing 43 to rotate together.

[0033] like Figure 6As shown, in order to enhance the clamping force on the spindle 1 and prevent the spindle 1 from slipping when it stops, while ensuring the rotatability of the friction wheel 42, each friction wheel 42 includes an integrally formed sleeve 421 and a conical head 422. The conical heads 422 of the two friction wheels 42 on the same roller 41 are arranged relatively spaced apart, and the spindle 1 abuts against the outer wall of the conical head 422 of each friction wheel 42.

[0034] like Figure 4-5 , Figure 7 As shown, to achieve axial positioning and movement as well as radial rotation, the roller 41 is configured with stepped shafts 411 at both ends. Limit nuts 5 are provided on the stepped shafts 411. One end of the bushing 43 abuts against the limit nut 5, while the other end can move linearly along the axis of the roller 41. To facilitate the assembly and connection of the bushing 43 and the roller 41, a first stepped hole 431 is provided inside the bushing 43. Four recessed slots 432 arranged radially inwardly and at intervals are provided within the small neck of the first stepped hole 431. Accordingly, the roller 41 has four pin holes 412 that correspond one-to-one with the slots 432. The roller 41 and the bushing 43 are connected by four pins 434 that pass through the pin holes 412 and are locked at both ends in the corresponding slots 432. Thus, the roller 41 and the bushing 43 can be connected by the pins 434. The roller 41 with the pins 434 can move linearly along the slots 432 of the bushing 43 and can also rotate with the bushing 43.

[0035] To simplify the structure and facilitate installation and replacement, the clamping mechanism in this embodiment uses a spring 6. The spring 6 is positioned within the large neck of the first stepped hole 431. A baffle 51 is also provided between the limiting nut 5 and the stepped surface of the stepped shaft 411. The diameter of the baffle 51 is adapted to the inner diameter of the spring 6. One end of the spring 6, as a fixed end, can be engaged with the baffle 51 and abut against the limiting nut 5, while the other end of the spring 6, as a movable end, abuts against the stepped surface 433 of the first stepped hole 431. (See [reference]). Figure 4 Therefore, under the elastic force of the spring 6, the two friction wheels 42 on the same roller 41 tend to always move closer to each other. Even if the friction wheels 42 wear out after a period of use, it can ensure that the outer wall of the conical head 422 of each friction wheel 42 can always be in contact with the main shaft 1, preventing the main shaft 1 from loosening and falling off.

[0036] To achieve efficient power transmission and simplify the structural design, making the overall equipment more compact, the gear transmission mechanism 3 in this embodiment includes a driving wheel 31 and at least one driven wheel cooperating with the driving wheel 31. This embodiment has two driven wheels, located on opposite sides of the driving wheel 31. The driving wheel 31 is driven to rotate by a gear motor 311. Each driven wheel meshes with a transmission wheel. Furthermore, the output end of each driven wheel and the output end of its meshing transmission wheel are respectively connected to a pair of roller assemblies 4. The number of driven wheels matches the number of pairs of roller assemblies 4. This embodiment has two driven wheels (first driven wheel 32, second driven wheel 33) and two transmission wheels (first transmission wheel 321, second transmission wheel 331). The first driven wheel 32 and the first transmission wheel 321 cooperate as a first meshing gear set, and the second driven wheel and the second transmission wheel 331 cooperate as a second meshing gear set. Correspondingly, the first meshing gear set is equipped with a first pair of roller assemblies 71, and the second meshing gear set is equipped with a second pair of roller assemblies 72. See [link to documentation]. Figure 3 .

[0037] Specifically, when gear transmission mechanism 3 is working, the rotation direction of each gear is as follows: Figure 8 If the active wheel 31 is set according to Figure 8 When the drive wheel 32 rotates clockwise as shown, it rotates counterclockwise, and the first drive wheel 321 rotates clockwise. A downward pulling force f1 is formed between the roller assembly 4 connected to the first drive wheel 32 and the roller assembly 4 connected to the first drive wheel 321. At the same time, the second drive wheel 33 rotates counterclockwise, and the second drive wheel 331 rotates clockwise. A downward pulling force f2 is also formed between the roller assembly 4 connected to the second drive wheel 33 and the roller assembly 4 connected to the second drive wheel 331. Thus, the main shaft 1 can move downward under the combined action of the first pulling force f1 and the second pulling force f2. Conversely, when the drive wheel 31 rotates counterclockwise, the directions of the first pulling force f1 and the second pulling force f2 are both upward, and the main shaft 1 can move upward. Therefore, by controlling the rotation direction of the drive wheel 31, the automatic operation of raising and lowering the main shaft 1 can be realized.

[0038] For ease of assembly, in this embodiment, the gear transmission mechanism 3 is installed in a space spaced apart by two partitions 35 at the front and rear, and the roller assembly 4 is assembled in a base 21. A closed box can be fitted outside the base 21 as the housing of the entire lifting device 93.

[0039] To ensure reliable transmission of gear power, each driven wheel and each transmission wheel are connected to the roller 41 of the corresponding roller assembly 4 via a transmission shaft 8. The transmission shaft 8 is a T-shaped shaft, and a keyway 81 is provided at the small end of the T-shaped shaft 8. The driven wheel and the transmission wheel are connected to the transmission shaft 8 via flat keys 811 that can be embedded in the keyway 81. Two symmetrically arranged U-shaped grooves 83 are provided on the side wall of the large end 82 of the T-shaped shaft 8 along the axial direction. A through hole 413 is provided at the connecting end of the roller 41 along the radial direction. The roller 41 and the transmission shaft 8 are connected by a positioning pin 831 that passes through the through hole 413 and the two U-shaped grooves 83, thereby realizing the transmission of rotational power.

[0040] In this embodiment, the friction wheel 42 is driven to rotate by gear transmission, thereby realizing the automatic raising and lowering of the propeller main shaft 1. Compared with the existing technology, which only allows manual disassembly and raising or lowering of the propeller (i.e., raising and lowering the main shaft 1), this not only greatly improves work efficiency and makes it more convenient to use, but also enables more precise control of the lifting height, and the adjustment is more flexible and reliable.

[0041] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. An automatically lifting thruster, comprising a thruster body (91) and a main shaft (1) connected to the thruster body (91), characterized in that: The main shaft (1) is equipped with a lifting device (93) that can drive the propeller body (91) to move automatically up and down. The lifting device (93) includes: The rotary clamping mechanism (2) includes at least one pair of roller assemblies (4) that are rotatable relative to each other and capable of clamping the main shaft (1). Each roller assembly (4) includes a friction wheel (42) and a clamping mechanism. The friction wheel (42) is in rolling contact with the main shaft (1), and the clamping mechanism makes the friction wheel (42) tend to always be in contact with the main shaft (1). Gear transmission mechanism (3) is used to drive the rotation of the friction wheel (42).

2. The automatic lifting thruster according to claim 1, characterized in that: The roller assembly (4) further includes a roller (41) and a bushing (43). The output end of the gear transmission mechanism (3) is fixedly connected to the roller (41). The roller (41) is fitted with a bushing (43) that can rotate with the roller (41). The clamping mechanism is located inside the bushing (43). The friction wheel (42) is fitted outside the bushing (43) and tightly fitted with the bushing (43).

3. The automatically lifting propeller according to claim 2, characterized in that: The roller (41) is configured as stepped shafts (411) at both ends, and a limit nut (5) is provided on the stepped shaft (411). One end of the bushing (43) abuts against the limit nut (5), and the other end can move linearly along the axis of the roller (41).

4. The automatically lifting propeller according to claim 3, characterized in that: The bushing (43) has a first stepped hole (431) inside, and a radially recessed slot (432) is provided in the small neck of the first stepped hole (431). Correspondingly, the roller (41) has a pin hole (412) in the radial direction. The roller (41) and the bushing (43) are connected by a pin (434) that passes through the pin hole (412) and is engaged in the slot (432). The clamping mechanism is provided in the large neck of the first stepped hole (431).

5. The automatically lifting thruster according to claim 4, characterized in that: The clamping mechanism is a spring (6), one end of which abuts against the limiting nut (5), and the other end abuts against the stepped surface of the first stepped hole (431).

6. The automatically lifting propeller according to claim 5, characterized in that: The clamping mechanism is a spring (6), one end of which abuts against the limiting nut (5), and the other end abuts against the stepped surface of the first stepped hole (431).

7. The automatically lifting propeller according to claim 1, characterized in that: The friction wheel (42) includes an integrally formed sleeve (421) and a conical head (422). Each roller assembly (4) includes two friction wheels (42) with two conical heads (422) facing each other and spaced apart. Each friction wheel (42) is provided with the clamping mechanism. The main shaft (1) abuts against the outer wall of the conical head (422) of each friction wheel (42).

8. The automatically lifting propeller according to claim 2, characterized in that: The roller assembly (4) has two pairs, which are arranged vertically and horizontally along the axial direction of the main shaft (1).

9. The automatically lifting propeller according to claim 1, characterized in that: The gear transmission mechanism (3) includes a driving wheel (31) and at least one driven wheel that cooperates with the driving wheel (31). Each driven wheel meshes with a transmission wheel. The output end of the driven wheel and the output end of the transmission wheel that meshes with it are respectively connected to a pair of roller assemblies (4). The number of driven wheels is adapted to the number of pairs of roller assemblies (4).

10. The automatically lifting propeller according to claim 9, characterized in that: The roller assembly (4) further includes a roller (41) that can drive the friction wheel (42) to rotate together. The driven wheel and the transmission wheel are respectively connected to the roller (41) of the corresponding roller assembly (4) through a transmission shaft (8). One end of the transmission shaft (8) is provided with a keyway (81). The driven wheel and the transmission wheel are respectively connected to the transmission shaft (8) through a flat key (811) that can be embedded in the keyway (81). The other end of the transmission shaft (8) has two symmetrically arranged U-shaped grooves (83) on its side wall along the axial direction. The connecting end of the roller (41) is provided with a through hole (413) along the radial direction. The roller (41) and the transmission shaft (8) are connected by a positioning pin (831) that passes through the through hole (413) and the two U-shaped grooves (83).

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