A propeller blade self-locking device

Abstract

The application discloses a propeller blade self-locking device which comprises a rubber sleeve, a first limiting component and a second limiting component, the first limiting component and the second limiting component both comprise a first rack, a second rack, a ratchet wheel, a gear, a pawl, a fixing rod, a spring and a base, the gear is coaxially arranged with the ratchet wheel, the gear is located between the first rack and the second rack and is engaged with the first rack and the second rack respectively, the fixing rod is fixed on the base and located between the first rack and the second rack, the pawl is rotatably connected to the upper end of the fixing rod and engaged with the first rack, one end of the spring is fixedly connected with the pawl, and the other end of the spring is fixedly connected with the fixing rod, and the two bases are connected with an extension component; by using the propeller blade self-locking device, the propeller blade can be prevented from rotating in a non-working state, the self-locking function of the propeller blade is realized, the cost is low, the structure is stable and easy to operate.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of propeller, and particularly relates to a propeller blade self-locking device. BACKGROUND

[0002] The propeller with a fairing is an important system component of a ship, and the propeller blade rotates freely in the clockwise or counterclockwise direction under the action of typhoon / wind in addition to high-speed rotation during operation. Such a situation is easy to cause damage to the structure of the propeller blade itself. With the continuous upgrading of wind force, the shaft system is prone to plastic deformation under the driving of the freely rotating propeller blade, and the clearance between the shaft system and the propeller blade deviates, and the tolerance of the concentricity does not meet the standard, which finally causes the whole system to be difficult to operate normally.

[0003] There are two common methods to prevent the propeller blade from rotating freely, one of which is to bind the propeller blade and the fairing flow branch arm with a nylon rope with rubber protection, and the other is to use a special clamp device according to the structure line type of the propeller. As for these two solutions, there are certain disadvantages: the first binding scheme is that the rope is easy to loosen under the action of wind force, and the tension force is difficult to meet the typhoon prevention requirements of the product boat; the second mold clamp scheme can meet the typhoon prevention requirements, but the process is relatively complex and the use range is extremely limited, and it also has the disadvantages of high cost. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a propeller blade self-locking device, which can effectively solve the problems of the prior art, such as difficulty in meeting the typhoon prevention requirements of the product boat with high tension force, complex process, and high cost.

[0005] In order to solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0006] The utility model provides a propeller blade self-locking device, which comprises a rubber sleeve for sleeving on the blade, a first limiting component and a second limiting component, the first limiting component and the second limiting component are symmetrically arranged on the left and right sides of the rubber sleeve, and the first limiting component and the second limiting component each comprise a first rack, a second rack, a ratchet wheel, a gear, a pawl, a fixed rod, a spring and a base, the first rack is fixedly connected with the rubber sleeve, the first rack extends along the length direction of the rubber sleeve, the second rack is fixed on the base and arranged in parallel with the first rack, the gear is coaxially arranged with the ratchet wheel, the gear is located between the first rack and the second rack and is meshed with the first rack and the second rack respectively, the fixed rod is fixed on the base and located between the first rack and the second rack, the pawl is rotatably connected to the upper end of the fixed rod and is meshed with the first rack, one end of the spring is fixedly connected with the pawl, and the other end of the spring is fixedly connected with the fixed rod, and the two bases are connected with a telescopic assembly.

[0007] As a preferred scheme of the utility model, the upper end of the rubber sleeve is provided with an embedding groove matched with the shape of the blade.

[0008] As a preferred scheme of the utility model, the depth of the embedding groove is between one third of the length of the rubber sleeve and one half of the length of the rubber sleeve.

[0009] As a preferred scheme of the utility model, the rubber sleeve comprises a rectangular part and a prismatic part connected in sequence, the first rack is fixed on the rectangular part, and the cross-sectional area of the upper end of the prismatic part is smaller than the cross-sectional area of the lower end of the prismatic part.

[0010] As a preferred scheme of the utility model, the base is arranged in a "concave" shape, the opening of the base faces downward, a rubber pad is embedded in the opening, and the rubber pad is arranged in a "convex" shape.

[0011] As a preferred scheme of the utility model, the ratchet wheel is provided with a handle for driving the ratchet wheel to rotate.

[0012] As a preferred scheme of the utility model, the base is further provided with a reinforcing plate for supporting the second rack.

[0013] As a preferred scheme of the present application, the telescopic assembly comprises a first telescopic rod and a second telescopic rod, the first telescopic rod is in sliding connection with the second telescopic rod, one end of the first telescopic rod is fixedly connected with the base of the first limiting assembly, one end of the second telescopic rod is fixedly connected with the base of the second limiting assembly, a plurality of first adjusting holes through which bolts can pass are arranged on the first telescopic rod along the length direction, a plurality of second adjusting holes through which bolts can pass are arranged on the second telescopic rod along the length direction, and the bolts are in threaded connection with the first adjusting holes and the second adjusting holes.

[0014] As a preferred scheme of the present application, the first rack, the second rack, the ratchet wheel, the base and the reinforcing plate are all made of stainless steel.

[0015] The propeller blade self-locking device provided by the present application has the following beneficial effects compared with the prior art:

[0016] In use, the upper end of the rubber sleeve is sleeved on the propeller blade, and the lower end of the rubber sleeve is attached to the surface of the spinner, the distance between the two bases is adjusted by the telescopic assembly according to actual needs, one end of the ratchet wheel is engaged with the first rack, the other end of the ratchet wheel is engaged with the second rack, and the relative height between the first rack and the second rack is adjusted by rotating the ratchet wheel, so that the lower end surface of the base is in abutment with the surface of the spinner, thereby further ensuring that the rubber sleeve and the first limiting assembly and the second limiting assembly on the left and right sides are in a relatively fixed state, and another self-locking device is sleeved on the opposite propeller blade in the same way; in this way, the pressure between the two opposite propeller blades and the friction force between the rubber sleeve and the propeller blade can be utilized at the same time, so that the propeller blade is in a fixed state and cannot rotate, thereby realizing the self-locking function of the propeller blade; by using the present application, the propeller blade can be prevented from rotating in a non-working state, the self-locking function of the propeller blade is realized, the cost is low, the structure is stable and easy to operate. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below.

[0018] Figure 1 is a structural schematic view of a propeller blade self-locking device provided by the present application;

[0019] Figure 2 is a front view of a propeller blade self-locking device provided by the present application;

[0020] Figure 3 is a side view of a propeller blade self-locking device provided by the present application;

[0021] Figure 4is a top view of a propeller blade self-locking device provided by an embodiment of the present application;

[0022] Figure 5 is a use state schematic diagram of a propeller blade self-locking device provided by an embodiment of the present application.

[0023] Marked in the figure:

[0024] Rubber sleeve 100; embedded groove 101; rectangular part 102; prismatic part 103; first limiting assembly 200; first rack 201; second rack 202; ratchet wheel 203; gear wheel 204; pawl 205; fixed rod 206; spring 207; base 208; rubber pad 209; handle 210; reinforcing plate 211; second limiting assembly 300; blade 400; fairing 500; telescopic assembly 600; first telescopic rod 601; second telescopic rod 602; first adjusting hole 603; second adjusting hole 604. DETAILED DESCRIPTION

[0025] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0026] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. It should be understood that the terms "first", "second" and the like are used to describe various information in the present application, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, the "first" information can also be referred to as "second" information without departing from the scope of the present application, and similarly, the "second" information can also be referred to as "first" information.

[0027] As Figures 1 to 5As shown, the preferred embodiment of the present application provides a propeller blade 400 self-locking device, which comprises a rubber sleeve 100 for being sleeved on the blade 400, a first limiting assembly 200 and a second limiting assembly 300, the first limiting assembly 200 and the second limiting assembly 300 are symmetrically arranged on the left and right sides of the rubber sleeve 100, the first limiting assembly 200 and the second limiting assembly 300 each comprise a first rack 201, a second rack 202, a ratchet wheel 203, a gear 204, a pawl 205, a fixed rod 206, a spring 207 and a base 208, the first rack 201 is fixedly connected with the rubber sleeve 100, the first rack 201 extends along the length direction of the rubber sleeve 100, the second rack 202 is fixed on the base 208 and is arranged in parallel with the first rack 201, the gear 204 is coaxially arranged with the ratchet wheel 203, the gear 204 is located between the first rack 201 and the second rack 202 and is engaged with the first rack 201 and the second rack 202 respectively, the fixed rod 206 is fixed on the base 208 and is located between the first rack 201 and the second rack 202, the pawl 205 is rotatably connected to the upper end of the fixed rod 206 and is engaged with the first rack 201, one end of the spring 207 is fixedly connected with the pawl 205, the other end of the spring 207 is fixedly connected with the fixed rod 206, and the two bases 208 are connected with an extension assembly 600.

[0028] In use, the upper end of the rubber sleeve 100 is sleeved on the blade 400, and the lower end of the rubber sleeve 100 is attached to the surface of the fairing 500, according to actual needs, the distance between the two bases 208 is adjusted through the extension assembly 600, one end of the ratchet wheel 203 is engaged with the first rack 201, the other end of the ratchet wheel 203 is engaged with the second rack 202, and rotating the ratchet wheel 203 can adjust the relative height between the first rack 201 and the second rack 202, so that the lower end surface of the base 208 abuts against the surface of the fairing 500, thereby further ensuring that the rubber sleeve 100 and the first limiting assembly 200 and the second limiting assembly 300 located on the left and right sides are in a relatively fixed state, and another self-locking device is sleeved on the opposite blade 400 in the same operation mode; thus, the pressure between the two opposite blades 400 and the friction force between the rubber sleeve 100 and the blade 400 can be utilized at the same time to make the blade 400 in a fixed state without rotating, thereby realizing the self-locking function of the propeller blade 400; by using the present application, the rotation of the propeller blade 400 in a non-working state can be avoided, the self-locking function of the propeller blade 400 is realized, the cost is low, the structure is stable and easy to operate.

[0029] Exemplarily, the upper end of the rubber sleeve 100 is provided with an embedding groove 101 which is matched with the shape of the paddle 400. In actual use, the size and shape of the embedding groove 101 can be adjusted according to the shape and size of the paddle 400 actually used.

[0030] Exemplarily, the depth of the embedding groove 101 is between one third of the length of the rubber sleeve 100 and one half of the length of the rubber sleeve 100, which can ensure the connection between the rubber sleeve 100 and the paddle 400 and avoid the difficulty of the rubber sleeve 100 being smoothly sleeved on the paddle 400 due to the too long embedding groove 101, thus facilitating the use.

[0031] Exemplarily, the rubber sleeve 100 comprises a rectangular portion 102 and a prismatic portion 103 connected in sequence, the first rack 201 is fixed on the rectangular portion 102, and the cross-sectional area of the upper end of the prismatic portion 103 is smaller than that of the lower end of the prismatic portion 103. Through the arrangement of the prismatic portion 103, the contact area between the rubber sleeve 100 and the fairing 500 can be increased, so as to increase the friction between the rubber sleeve 100 and the fairing 500, thereby ensuring the connection stability between the rubber sleeve 100 and the paddle 400 and between the rubber sleeve 100 and the fairing 500.

[0032] Exemplarily, the base 208 is provided in a "concave" shape, the opening of the base 208 faces downward, the rubber pad 209 is embedded in the opening, and the rubber pad 209 is provided in a "convex" shape. Through the arrangement of the embedded rubber pad 209, the contact area between the rubber pad 209 and the base 208 can be increased, one side of the rubber pad 209 abuts against the base 208, and the other side of the rubber pad 209 abuts against the base 208, after the ratchet 203 is adjusted to the appropriate position, the rubber pad 209 can be in a squeezed state, thereby further ensuring the connection stability between the paddle 400, the self-locking device and the fairing 500.

[0033] Exemplarily, in order to facilitate the movement of the ratchet 203, the handle 210 for driving the ratchet 203 to rotate is arranged on the ratchet 203.

[0034] Exemplarily, the base 208 is further provided with the reinforcing plate 211 for supporting the second rack 202. The reinforcing plate 211 can support the second rack 202, so as to avoid the inclination of the second rack 202 during the adjustment, thereby achieving the reinforcing effect.

[0035] For example, the telescopic assembly 600 includes a first telescopic rod 601 and a second telescopic rod 602. The first telescopic rod 601 and the second telescopic rod 602 are slidably connected. One end of the first telescopic rod 601 is fixedly connected to the base 208 of the first limiting assembly 200, and one end of the second telescopic rod 602 is fixedly connected to the base 208 of the second limiting assembly 300. The first telescopic rod 601 has a plurality of first adjustment holes 603 along its length direction for bolts to pass through, and the second telescopic rod 602 has a plurality of second adjustment holes 604 along its length direction for bolts to pass through. The bolt passes through the second adjustment holes 604 and is threadedly connected to the first adjustment holes 603. In actual operation, the positions of the first telescopic rod 601 and the second telescopic rod 602 can be adjusted according to actual usage needs; at the same time, the first telescopic rod 601 and the second telescopic rod 602 can also serve as a connection to prevent the base 208 located on the left and right sides from lateral displacement, which would cause the ratchet 203 to loosen and fall off, further preventing damage to the propeller 400 or the guide fairing 500, and ensuring the connection stability between the first limiting component 200 and the second limiting component 300.

[0036] For example, the first rack 201, the second rack 202, the ratchet 203, the base 208 and the reinforcing plate 211 are all made of stainless steel, which can better resist the external natural environment and prevent rust and contamination of other components.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A propeller blade self-locking device, characterized in that, The device includes a rubber sleeve for mounting on a propeller blade, a first limiting component, and a second limiting component. The first and second limiting components are located on the left and right sides of the rubber sleeve and are symmetrically arranged. Each of the first and second limiting components includes a first rack, a second rack, a ratchet, a gear, a pawl, a fixing rod, a spring, and a base. The first rack is fixedly connected to the rubber sleeve and extends along the length of the rubber sleeve. The second rack is fixed to the base and is arranged parallel to the first rack. The gear is coaxial with the ratchet and is located between the first and second racks and meshes with both racks. The fixing rod is fixed to the base and is located between the first and second racks. The pawl is rotatably connected to the upper end of the fixing rod and meshes with the first rack. One end of the spring is fixedly connected to the pawl, and the other end of the spring is fixedly connected to the fixing rod. A telescopic component is connected between the two bases. The rubber sleeve includes a rectangular portion and a frustum portion connected in sequence. The first rack is fixed on the rectangular portion. The cross-sectional area of ​​the upper end of the frustum portion is smaller than the cross-sectional area of ​​the lower end of the frustum portion. The base is set in a "U" shape with the opening facing downward. A rubber pad is embedded in the opening. The rubber pad is set in a "T" shape. The ratchet is provided with a handle for driving the ratchet to rotate. The base is also provided with a reinforcing plate for supporting the second rack. The telescopic assembly includes a first telescopic rod and a second telescopic rod. The first telescopic rod and the second telescopic rod are slidably connected. One end of the first telescopic rod is fixedly connected to the base of the first limiting assembly, and one end of the second telescopic rod is fixedly connected to the base of the second limiting assembly. The first telescopic rod has a plurality of first adjustment holes along its length for bolts to pass through, and the second telescopic rod has a plurality of second adjustment holes along its length for bolts to pass through. The bolt passes through the second adjustment holes and is threadedly connected to the first adjustment holes.

2. The propeller blade self-locking device according to claim 1, characterized in that, The upper end of the rubber sleeve is provided with an embedding groove, which matches the shape of the blade.

3. The propeller blade self-locking device according to claim 2, characterized in that, The depth of the embedding groove is between one-third and one-half the length of the rubber sleeve.

4. The propeller blade self-locking device according to claim 1, characterized in that, The first rack, the second rack, the ratchet, the base, and the reinforcing plate are all made of stainless steel.

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