Propeller capable of improving pitch adjusting precision

Abstract

The utility model discloses a propeller capable of improving pitch adjusting precision, which belongs to the technical field of propellers, and comprises a propeller hub, a group of mounting cylinders are movably connected to the side edge of the propeller hub, one end of each mounting cylinder is provided with a blade in a clamping manner, and the other end of each mounting cylinder is provided with a plurality of blades in a clamping manner. A threaded rod is in threaded connection with the center of the interior of the propeller hub, a reinforcing mechanism is arranged in the center of the top face of the propeller hub, a toothed rod is fixedly connected to the other end of the mounting barrel, a rotary knob is fixedly connected to the upper end of the threaded rod, an extrusion block is fixedly connected to the bottom end of the threaded rod, and a set of pressed plates are arranged at the positions, close to the side edge, of the lower portion of the extrusion block at equal intervals. According to the scheme, the high-precision adjusting assembly is arranged, the propeller pitch can be conveniently, efficiently and accurately adjusted, the convenience of propeller blade adjustment is improved, the reinforcing assembly is arranged, the adjusting end of the adjusting assembly can be limited and reinforced, the problem that the adjusting assembly is loosened is solved, and the installation stability of the propeller blades is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of propellers, and more particularly to a propeller capable of improving pitch adjustment accuracy. Background Art

[0002] With the rapid development of my country's general aviation industry, there are more and more types of general aircraft, such as powered paragliders and drones, and the types of corresponding propellers are also increasing. The most common of these is the split propeller. When in use, the propeller blades and metal hub are assembled for flight. However, under various working conditions such as different altitudes, different geographical environments, and different operating requirements, the propeller pitch needs to be changed frequently to meet the use requirements of different working conditions.

[0003] Based on the above, the inventors found that in existing propeller products, the cross-section of the blade root at the connection with the hub is a perfect circle, and the blade root mounting hole reserved on the hub is also a perfect circle. Due to the limitation of the diameter of the perfect circle, the diameter of the perfect circle cannot be too large, and it is difficult to control the blade turning angle very accurately. Therefore, in view of this, the existing structure is studied and improved to provide a propeller that can improve the pitch adjustment accuracy, in order to achieve a more practical purpose. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In response to the problems existing in the prior art, the purpose of the present utility model is to provide a propeller that can improve the pitch adjustment accuracy. This solution sets up a high-precision adjustment component, which can adjust the pitch conveniently, efficiently and accurately, thereby improving the convenience of blade adjustment. In addition, a reinforcement component is set up to limit and reinforce the adjustment end of the adjustment component, reduce the problem of loosening of the adjustment component, and ensure the installation stability of the blade.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the present invention adopts the following technical solutions.

[0008] A propeller capable of improving pitch adjustment accuracy comprises a propeller hub, a group of mounting cylinders movably connected to the side of the propeller hub, a blade being clamped and arranged at one end of the mounting cylinder, a threaded rod being threadedly connected to the center of the interior of the propeller hub, and a reinforcement mechanism being arranged at the center of the top surface of the propeller hub, the other end of the mounting cylinder being fixedly connected to a gear rod, the upper end of the threaded rod being fixedly connected to a torsion, and the bottom end of the threaded rod being fixedly connected to an extrusion block, a group of pressure plates being equidistantly arranged on the side below the extrusion block, a sliding rod being fixedly connected to the bottom of the pressure plate, and a positioning sleeve being fixedly connected to one end of the pressure plate, and a return spring being fixedly connected to one side of the sliding rod;

[0009] The reinforcement mechanism includes a threaded ring, the inner side of the threaded ring is clamped with a protective tube, the upper end of the protective tube is fixedly connected to a reinforcement block against the bottom surface, and the outer side of the protective tube is movably connected to a threaded sleeve.

[0010] Furthermore, a scale is provided at the connection between the outer side of the hub and the mounting tube, and a bolt is threadedly connected at the connection between the mounting tube and the blade.

[0011] Furthermore, the extrusion block is arranged in a triangular cone shape, and the side of the extrusion block is in contact with the inner end of the pressure plate.

[0012] Furthermore, a set of tooth grooves is provided on the outer side of the gear rod and the inner side of the positioning sleeve, and the specification of the tooth grooves is 0.5°.

[0013] Furthermore, the sliding rod is slidably connected to the propeller hub, and one end of the return spring away from the sliding rod is fixedly connected to the inner surface of the propeller hub.

[0014] Furthermore, the threaded ring is fixedly connected to the top surface of the hub in the center, and the threaded sleeve is threadedly connected to the threaded ring.

[0015] Furthermore, a clamping groove is provided on the top of the knob, and the reinforcement block is clamped to the clamping groove.

[0016] 3. Beneficial effects

[0017] Compared with the prior art, the advantages of the present invention are:

[0018] (1) This solution adjusts the pitch by rotating the blade to drive the mounting tube to rotate. By making the extrusion block drop vertically, the pressure plate and the positioning sleeve move outward and engage with the gear rod, thereby fixing the angle between the mounting tube and the blade. The blade can be accurately adjusted in pitch by the tooth groove and the scale. Compared with the existing technology, the provision of a high-precision adjustment component can adjust the pitch conveniently, efficiently and accurately, thereby improving the convenience of blade adjustment.

[0019] (2) By setting up a reinforcement mechanism, when the position of the blade is fixed, the protective tube is first clamped with the inner side of the threaded ring. At this time, the reinforcement block is clamped with the clamping groove on the top of the twist knob, and then the threaded sleeve is rotated to be threadedly connected with the threaded ring to fix the position of the protective tube, limit the twist knob and reinforce it, and reduce the problem of twist knob loosening. Compared with the existing technology, setting up a reinforcement component can limit the adjustment end of the adjustment component and reinforce it, reduce the problem of adjustment component loosening, and ensure the installation stability of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the propeller hub of the present invention;

[0022] Figure 3 This is a schematic diagram of the positional relationship between the extrusion block and the pressure plate of the present utility model;

[0023] Figure 4 This is a structural breakdown diagram of the reinforcement mechanism of the present invention.

[0024] Explanation of the numbers in the figure: 1. Hub; 2. Mounting tube; 3. Blade; 4. Threaded rod; 5. Gear rod; 6. Torque; 7. Extrusion block; 8. Pressure plate; 9. Sliding rod; 10. Positioning sleeve; 11. Return spring; 12. Reinforcement mechanism; 13. Threaded ring; 14. Protective tube; 15. Reinforcement block; 16. Threaded sleeve. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] Example:

[0027] See also Figure 1-4 , a propeller capable of improving pitch adjustment accuracy, comprising a hub 1, a group of mounting tubes 2 movably connected to the side of the hub 1, a blade 3 being clamped and arranged at one end of the mounting tube 2, a threaded rod 4 being threadedly connected to the center of the interior of the hub 1, and a reinforcement mechanism 12 being arranged at the center of the top surface of the hub 1, a gear rod 5 being fixedly connected to the other end of the mounting tube 2, a torsion 6 being fixedly connected to the upper end of the threaded rod 4, and an extrusion block 7 being fixedly connected to the bottom end of the threaded rod 4, a group of pressure plates 8 being equidistantly arranged at the side below the extrusion block 7, a sliding rod 9 being fixedly connected to the bottom of the pressure plate 8, and a positioning sleeve 10 being fixedly connected to one end of the pressure plate 8, and a return spring 11 being fixedly connected to one side of the sliding rod 9;

[0028] The reinforcement mechanism 12 includes a threaded ring 13, a protective tube 14 is clamped on the inner side of the threaded ring 13, the upper end of the protective tube 14 is fixedly connected to a reinforcement block 15 against the bottom surface, and the outer side of the protective tube 14 is movably connected to a threaded sleeve 16. In order to improve the installation stability of the blade 3, the reinforcement mechanism 12 is provided.

[0029] See Figure 2A scale is provided at the connection between the outer side of the hub 1 and the mounting tube 2. A bolt is threadedly connected to the connection between the mounting tube 2 and the blade 3. First, align the mounting end of the blade 3 with the mounting tube 2 and fix them with the bolts. Then, rotate the blade 3 to drive the mounting tube 2 to rotate synchronously to adjust the pitch.

[0030] See Figure 3 The extrusion block 7 is arranged in a triangular cone shape, and the side of the extrusion block 7 is in contact with the inner end of the pressure plate 8. After the adjustment work is completed, the threaded rod 4 is driven to rotate by turning 6. Since the threaded rod 4 is movably connected to the extrusion block 7, under the action of the guide rod on the top surface of the extrusion block 7, the extrusion block 7 drops vertically and squeezes the pressure plate 8 at the same time.

[0031] See Figure 3 A set of tooth grooves are provided on the outside of the gear rod 5 and the inside of the positioning sleeve 10, and the specification of the tooth groove is 0.5°. The pressure plate 8 is driven by the force to drive the positioning sleeve 10 to move outward and engage with the gear rod 5, thereby fixing the angle of the mounting tube 2. The tooth groove cooperates with the scale to enable the blade 3 to perform precise pitch adjustment.

[0032] See Figure 3 The sliding rod 9 is slidably connected to the propeller hub 1, and the end of the return spring 11 away from the sliding rod 9 is fixedly connected to the inner surface of the propeller hub 1. When the extrusion block 7 is separated from the pressure plate 8, under the action of the return spring 11, the sliding rod 9 and the positioning sleeve 10 are reset, and the positioning sleeve 10 is separated from the gear rod 5, then the mounting tube 2 resumes its active state and can be rotated and adjusted.

[0033] See Figure 4 The threaded ring 13 is fixedly connected to the center of the top surface of the hub 1, and the threaded sleeve 16 is threadedly connected to the threaded ring 13. When the position of the blade 3 is fixed, the protective tube 14 is first clamped with the inner side of the threaded ring 13, and then the threaded sleeve 16 is rotated to thread the threaded ring 13 to fix the position of the protective tube 14 and limit and reinforce the torque 6.

[0034] See Figure 4 The top of the twist 6 is provided with a clamping groove, and the reinforcement block 15 is clamped with the clamping groove. The reinforcement block 15 is clamped with the clamping groove at the top of the twist 6.

[0035] After the adjustment is completed, the threaded rod 4 is driven by the twisting wheel 6 to rotate. Since the threaded rod 4 is movably connected to the extrusion block 7, the extrusion block 7 drops vertically and squeezes the pressure plate 8. The pressure plate 8 is forced to drive the positioning sleeve 10 to move outward and engage with the gear rod 5, thereby fixing the angle of the installation tube 2 and the blade 3. The blade 3 can be accurately adjusted in pitch by coordinating the tooth groove with the scale. When the position of the blade 3 is fixed, the protective tube 14 is first engaged with the inner side of the threaded ring 13. At this time, the reinforcement block 15 is engaged with the engaging groove at the top of the twisting wheel 6. Then the threaded sleeve 16 is rotated and threadedly connected with the threaded ring 13 to fix the position of the protective tube 14, limit and reinforce the twisting wheel 6, and reduce the problem of loosening of the twisting wheel 6.

[0036] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention 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. Therefore, they cannot be understood as a limitation on the present invention.

[0037] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0038] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed in the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A propeller capable of improving pitch adjustment accuracy, comprising a propeller hub (1), a set of mounting tubes (2) movably connected to the side of the propeller hub (1), and a blade (3) being clamped and provided at one end of the mounting tube (2), characterized in that: The hub (1) is centrally threaded with a threaded rod (4), and a reinforcing mechanism (12) is centrally provided on the top surface of the hub (1), the other end of the mounting tube (2) is fixedly connected to a gear rod (5), the upper end of the threaded rod (4) is fixedly connected to a torsion bar (6), and the bottom end of the threaded rod (4) is fixedly connected to an extrusion block (7), a group of pressure plates (8) are equidistantly provided on the side below the extrusion block (7), the bottom of the pressure plate (8) is fixedly connected to a sliding rod (9), and one end of the pressure plate (8) is fixedly connected to a positioning sleeve (10), and one side of the sliding rod (9) is fixedly connected to a return spring (11); The reinforcement mechanism (12) comprises a threaded ring (13), a protective tube (14) is clamped on the inner side of the threaded ring (13), a reinforcement block (15) is fixedly connected to the upper end of the protective tube (14) against the bottom surface, and a threaded sleeve (16) is movably connected to the outer side of the protective tube (14).

2. A propeller capable of improving pitch adjustment accuracy according to claim 1, characterized in that: A scale is provided at the connection between the outer side of the hub (1) and the mounting tube (2), and a bolt is threadedly connected at the connection between the mounting tube (2) and the blade (3).

3. A propeller capable of improving pitch adjustment accuracy according to claim 1, characterized in that: The extrusion block (7) is arranged in a triangular cone shape, and the side of the extrusion block (7) is in contact with the inner end of the pressure plate (8).

4. A propeller capable of improving pitch adjustment accuracy according to claim 1, characterized in that: A set of tooth grooves is provided on the outer side of the gear rod (5) and the inner side of the positioning sleeve (10), and the specification of the tooth grooves is 0.5°.

5. The propeller capable of improving pitch adjustment accuracy according to claim 1, characterized in that: The sliding rod (9) is slidably connected to the propeller hub (1), and one end of the return spring (11) away from the sliding rod (9) is fixedly connected to the inner surface of the propeller hub (1).

6. A propeller capable of improving pitch adjustment accuracy according to claim 1, characterized in that: The threaded ring (13) is fixedly connected to the center of the top surface of the hub (1), and the threaded sleeve (16) is threadedly connected to the threaded ring (13).

7. The propeller capable of improving pitch adjustment accuracy according to claim 1, characterized in that: The top of the turning knob (6) is provided with a snap-fitting groove, and the reinforcing block (15) is snap-fitted with the snap-fitting groove.

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