Main thrust propeller assembly

Abstract

The utility model relates to the technical field of aircraft accessories, in particular to a main thrust propeller assembly which comprises a main shaft, a limiting disc is fixedly installed at the end of the main shaft, and an end shaft coaxial with the main shaft is fixedly installed on the upper surface of the limiting disc. A plurality of positioning protruding blocks which are annularly arranged at equal intervals are fixedly installed on the annular side face of the end shaft, the end shaft is sleeved with a propeller sleeve, a center hole is formed in the center of the propeller sleeve, and a plurality of guide holes which are annularly arranged at equal intervals are formed in the hole wall of the center hole. The positioning protruding block is located in the guide hole and matched with the guide hole in an inserted mode, a plurality of propeller blades which are annularly arranged at equal intervals are arranged on the annular side face of the propeller sleeve, a fastening bolt is connected to the top face of the positioning protruding block in a threaded mode, a pressing disc is fixedly installed at the end of the fastening bolt, and the pressing disc is pressed on the top face of the propeller sleeve. The utility model has firm and stable structure, and is convenient to fix and assemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of aircraft accessories, in particular to a main push propeller assembly. BACKGROUND

[0002] The propeller is the main power device of the aircraft, and its performance is directly related to the flight efficiency, safety and reliability of the aircraft. With the continuous progress of aviation technology, the requirements for the propeller assembly are also increasing, especially in the pursuit of high efficiency, light weight, durability, etc. The design and manufacture of the propeller assembly face many challenges.

[0003] Most of the current propeller assemblies are made of metal materials such as aluminum alloy. Metal materials perform well in strength and durability, and can extend the service life. However, most of the main propellers are fixed and installed on the corresponding transmission shaft, and are mostly fixed by multiple fastening bolts from the annular side. The annular side has a large bending degree, and the contact area with the end of the fastening bolt is small, making it difficult to ensure stable fixing operation by fastening bolts. In addition, fixing from the annular side is also prone to loose gaps. Since the propeller blades are also fixed and installed on the annular side, they occupy a lot of space, causing obstruction to the assembly and tightening of the fastening bolts, affecting the fixing effect. In view of this, we propose a main propeller assembly. SUMMARY

[0004] The utility model aims at providing a main propeller assembly to solve the defects in the background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A main propeller assembly, comprising a main shaft, a limit disc fixedly installed at the end of the main shaft, an end shaft coaxially arranged with the main shaft fixedly installed on the upper surface of the limit disc, a plurality of positioning protrusions arranged in a ring shape and at equal intervals fixedly installed on the annular side of the end shaft, a propeller sleeve sleeved on the end shaft, a center hole provided at the center position of the propeller sleeve, a plurality of guide holes arranged in a ring shape and at equal intervals provided on the hole wall of the center hole, the positioning protrusions located in the guide holes and inserted and matched with the guide holes, a plurality of propeller blades arranged in a ring shape and at equal intervals provided on the annular side of the propeller sleeve, a fastening bolt threadedly connected to the top surface of the positioning protrusion, a pressing disc fixedly installed at the end of the fastening bolt, and the pressing disc pressed on the top surface of the propeller sleeve.

[0007] Preferably, a plurality of reinforcing rib plates arranged in a ring shape and at equal intervals are fixedly installed between the bottom surface of the limit disc and the main shaft, and the cross section of the reinforcing rib plate is in a triangular shape.

[0008] Preferably, a flat disc is fixedly installed on the top surface of the end shaft, and the outer diameter of the flat disc is smaller than the outer diameter of the end shaft.

[0009] Preferably, the thickness of the pressing disc is equal to the thickness of the flat disc, and the size of the positioning lug is matched with the size of the guide hole.

[0010] Preferably, the number of the positioning lugs and the guide holes is greater than 4, and the height of the propeller sleeve is equal to the height of the end shaft.

[0011] Preferably, a hexagonal lug is fixedly installed at the center of the upper surface of the pressing disc, and the cross section of the hexagonal lug is hexagonal.

[0012] Preferably, a plurality of support rings are fixedly installed on the annular side surface of the propeller sleeve, the support rings are arranged in a ring shape at equal intervals, the support rings are provided with insertion holes, the end of the propeller blade is fixedly installed with an insertion column, the insertion column is inserted into the insertion hole in a matched mode, a fixing ring is fixedly installed on the insertion column, and the fixing ring and the support ring are fixedly connected through a plurality of fastening bolts.

[0013] Preferably, a fairing is fixedly installed on the top surface of the propeller sleeve, and the outer diameter of the fairing gradually increases from top to bottom.

[0014] Compared with the prior art, the propeller sleeve of the utility model has the advantages that:

[0015] 1. The propeller sleeve is sleeved on the end shaft, and the positioning lugs are used for positioning, so that precise guiding and installation operation is realized. In addition, the fastening bolts are threadedly connected with the positioning lugs, the pressing discs are pressed on the positioning lugs, the end shaft and the propeller sleeve at the same time, stable fixing operation is realized, the plurality of pressing discs are pressed along the annular part of the propeller sleeve, the loosening gap is not prone to occurring, and the normal installation of the propeller blades on the annular side surface of the propeller sleeve is not occupied by the pressing disc blades, so that the structure is firm and stable, and convenient fixing and installation effect is achieved.

[0016] 2. The reinforcing rib plate is arranged, so that the structure between the limiting disc and the main shaft is more firm and stable. The insertion column and the insertion hole are inserted into each other in a matched mode, and then the fixing ring and the support ring are fixed, so that assembly operation is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the utility model;

[0018] Figure 2 It is one of the explosion structure schematic views of the utility model;

[0019] Figure 3 It is the second schematic diagram of explosion structure of the utility model;

[0020] Figure 4 It is the third schematic diagram of explosion structure of the utility model;

[0021] Figure 5 It is the utility model Figure 4 The enlarged view of A in the middle;

[0022] Figure 6 It is the schematic diagram of partial structure of the utility model;

[0023] The meaning of each reference numeral in the drawing is as follows:

[0024] 1, main shaft; 10, limit disc; 11, reinforcing rib plate; 12, end shaft; 121, flat disc; 13, positioning lug; 14, fastening bolt; 141, pressing disc; 142, hexagonal lug;

[0025] 2, propeller sleeve; 20, center hole; 21, guide hole; 22, support ring; 221, insertion hole;

[0026] 3, propeller blade; 30, insertion column; 31, fixing ring;

[0027] 4, fairing. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0029] Please refer to Figures 1-6 The utility model provides a kind of technical scheme: a kind of main push propeller assembly, including main shaft 1, the end of main shaft 1 is fixedly installed with limit disc 10, the upper surface of limit disc 10 is fixedly installed with the end shaft 12 of being arranged with the coaxial line of main shaft 1, the annular side surface of end shaft 12 is fixedly installed with multiple positioning lugs 13 arranged in ring shape at equal intervals, end shaft 12 is set with propeller sleeve 2, the central position of propeller sleeve 2 is provided with center hole 20, end shaft 12 is inserted with the cooperation between center hole 20, the hole wall of center hole 20 is provided with multiple guide holes 21 arranged in ring shape at equal intervals, positioning lug 13 is located in guide hole 21 and is inserted with the cooperation between guide hole 21, the size of positioning lug 13 is adapted to the size of guide hole 21, realize guiding and positioning installation operation;

[0030] Specifically, the annular side surface of the propeller sleeve 2 is provided with a plurality of annularly and equidistantly arranged propeller blades 3, the top surface of the positioning boss 13 is threadedly connected with a fastening bolt 14, the end of the fastening bolt 14 is fixedly installed with a pressing disc 141, the pressing disc 141 is pressed on the top surface of the propeller sleeve 2, specifically, the pressing disc 141 is simultaneously pressed on the top surfaces of the positioning boss 13, the end shaft 12 and the propeller sleeve 2, so as to realize the fixing operation.

[0031] In the embodiment, a plurality of annularly and equidistantly arranged reinforcing rib plates 11 are fixedly installed between the bottom surface of the limiting disc 10 and the main shaft 1, the cross section of the reinforcing rib plate 11 is triangular, and the reinforcing rib plate 11 can ensure that the structure between the limiting disc 10 and the main shaft 1 is more firm and stable.

[0032] Specifically, the top surface of the end shaft 12 is fixedly installed with a flat disc 121, the outer diameter of the flat disc 121 is smaller than the outer diameter of the end shaft 12, the thickness of the pressing disc 141 is equal to the thickness of the flat disc 121, and the height of the propeller sleeve 2 is equal to the height of the end shaft 12, so as to facilitate judging whether the fastening bolt 14 is tightened by observing whether the surface of the pressing disc 141 is flush with the surface of the flat disc 121.

[0033] Further, the number of the positioning boss 13 and the guide hole 21 is greater than 4, which is used for stably assembling the propeller sleeve 2.

[0034] In addition, the upper surface of the pressing disc 141 is fixedly installed with a hexagonal boss 142 at the center position, the cross section of the hexagonal boss 142 is hexagonal, which facilitates the tightening operation of the fastening bolt 14 in cooperation with the external wrench.

[0035] It is worth noting that the annular side surface of the propeller sleeve 2 is fixedly installed with a plurality of annularly and equidistantly arranged supporting rings 22, the supporting ring 22 is provided with a plug-in hole 221, the end of the propeller blade 3 is fixedly installed with a plug-in column 30, the plug-in column 30 is plug-in matched with the plug-in hole 221, the plug-in column 30 is fixedly installed with a fixing ring 31, and the fixing ring 31 is fixedly connected with the supporting ring 22 through a plurality of fastening bolts, so as to facilitate the fixed installation operation of the propeller blade 3.

[0036] It is worth noting that the top surface of the propeller sleeve 2 is fixedly installed with a fairing 4 through a plurality of fastening bolts, and the outer diameter of the fairing 4 gradually increases from top to bottom.

[0037] When the main propeller assembly of the present invention is in use, the plug-in column 30 is inserted into the plug-in hole 221, and then the support ring 22 and the fixing ring 31 are fixedly connected using multiple fastening bolts. Then the propeller sleeve 2 is put on the end shaft 12 and the positioning protrusion 13, and then the fastening bolts 14 are tightened into the corresponding threaded holes in the positioning protrusion 13 to ensure that the clamping plate 141 is simultaneously pressed against the positioning protrusion 13, the end shaft 12 and the top surface of the propeller sleeve 2. Finally, the deflector 4 is fixed to the propeller sleeve 2 using the fastening bolts to complete the fixing operation.

[0038] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A main propeller assembly, comprising a main shaft (1), characterized in that: The end of the main shaft (1) is fixedly installed with a limiting disc (10), the upper surface of the limiting disc (10) is fixedly installed with an end shaft (12) coaxial with the main shaft (1), the annular side surface of the end shaft (12) is fixedly installed with a plurality of positioning protrusions (13) arranged in a ring shape at equal intervals, a propeller sleeve (2) is sleeved on the end shaft (12), the central position of the propeller sleeve (2) is provided with a central hole (20), a plurality of guide holes (21) arranged in a ring shape at equal intervals are arranged on the hole wall of the central hole (20), the positioning protrusions (13) are located in the guide holes (21) and are inserted and matched with the guide holes (21), a plurality of propeller blades (3) arranged in a ring shape at equal intervals are arranged on the annular side surface of the propeller sleeve (2), the top surface of the positioning protrusion (13) is threadedly connected with a fastening bolt (14), the end of the fastening bolt (14) is fixedly installed with a pressing disc (141), and the pressing disc (141) is pressed on the top surface of the propeller sleeve (2).

2. The main push propeller assembly of claim 1, wherein: A plurality of reinforcing rib plates (11) arranged in a ring shape at equal intervals are fixedly installed between the bottom surface of the limiting disc (10) and the main shaft (1), and the cross section of the reinforcing rib plate (11) is in a triangular shape.

3. The main push propeller assembly of claim 1, wherein: A flat disc (121) is fixedly installed on the top surface of the end shaft (12), and the outer diameter of the flat disc (121) is smaller than the outer diameter of the end shaft (12).

4. The main push propeller assembly of claim 3, wherein: The thickness of the pressing disc (141) is equal to the thickness of the flat disc (121), and the size of the positioning protrusion (13) is matched with the size of the guide hole (21).

5. The main push propeller assembly of claim 1, wherein: The number of the positioning protrusions (13) and the guide holes (21) is greater than 4, and the height of the propeller sleeve (2) is equal to the height of the end shaft (12).

6. The main push propeller assembly of claim 1, wherein: A hexagonal protrusion (142) is fixedly installed at the central position of the upper surface of the pressing disc (141), and the cross section of the hexagonal protrusion (142) is in a hexagonal shape.

7. The main push propeller assembly of claim 1, wherein: A plurality of support rings (22) arranged in a ring shape at equal intervals are fixedly installed on the annular side surface of the propeller sleeve (2), an insertion hole (221) is arranged in the support ring (22), an insertion column (30) is fixedly installed at the end of the propeller blade (3), the insertion column (30) is inserted and matched with the insertion hole (221), a fixing ring (31) is fixedly installed on the insertion column (30), and the fixing ring (31) and the support ring (22) are fixedly connected through a plurality of fastening bolts.

8. The main push propeller assembly of claim 1, wherein: A fairing (4) is fixedly installed on the top surface of the propeller sleeve (2), and the outer diameters of the fairing (4) from top to bottom increase in turn.

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