Quick-release rotor head of unmanned helicopter

Abstract

The utility model relates to the technical field of unmanned helicopters, in particular to a quick-release rotor head of an unmanned helicopter, which comprises a rotor hub, a rotor mounting seat and a rotor spindle, blades are arranged at two ends of the rotor hub, a connecting shaft is arranged at the bottom end of the rotor hub, and the rotor mounting seat is of a vertically through cylindrical structure. The bottom of the connecting shaft extends into the rotor mounting seat and is fixedly connected with the rotor mounting seat through a bolt; the outer diameter of the rotor wing main shaft is matched with the inner diameter of the rotor wing mounting base, a plurality of embedded grooves are formed in the outer surface of the rotor wing main shaft, positioning assemblies are arranged in the embedded grooves, and positioning holes corresponding to the positioning assemblies one to one are formed in the outer side wall of the rotor wing mounting base in a penetrating mode; the rotor wing main shaft is used for being fixedly connected with the output shaft of the driving device, the rotor wing mounting seat is connected with the rotor wing main shaft through the positioning assembly, and a plurality of bolts do not need to be dismounted during maintenance, so that the dismounting and maintenance efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to unmanned helicopter technical field, concretely is a kind of unmanned helicopter quick-release type rotor head. BACKGROUND

[0002] Unmanned aerial vehicle is a kind of not carrying people's plane using radio remote control equipment and self-provided program control device to manipulate, compared with carrying people's plane, unmanned aerial vehicle is more suitable for those "foolish, dirty or dangerous" task. At present, unmanned aerial vehicle is widely used in aerial photography, agriculture, express delivery, disaster rescue, surveying and mapping, news report, power patrol and other fields, and developed countries are also actively expanding the industry application of unmanned aerial vehicle and developing unmanned aerial vehicle technology.

[0003] Unmanned helicopter is a kind of unmanned aerial vehicle model, because it has the function of ascending and descending, so the requirement for flight site is low, and the applicability is very extensive. The top of the existing unmanned helicopter is equipped with a rotor head, which is powered by a driving device inside the fuselage to provide upward lift for the aircraft. However, the traditional rotor head and the output shaft of the driving device are fixedly connected by using multiple bolts. Although this design ensures the stability of the rotor head, it is time-consuming and labor-intensive to disassemble when maintenance or replacement of the rotor head is required. This leads to low maintenance efficiency and seriously affects the operation and maintenance efficiency of the unmanned helicopter. Therefore, under the premise of ensuring the firm connection of the rotor head, how to improve the disassembly efficiency of the rotor head is a problem to be solved in the field at present. Therefore, we propose a quick-release type rotor head for unmanned helicopter to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a quick-release type rotor head for unmanned helicopter to solve the problems proposed in the above background technology.

[0005] The utility model is implemented by the following technical solutions: a quick-release type rotor head for unmanned helicopter, comprising a rotor hub, both ends of the rotor hub are provided with blades, the bottom end of the rotor hub is provided with a connecting shaft, and further comprising:

[0006] A rotor mounting seat in the form of a through-cylinder structure, the bottom of the connecting shaft extends into the rotor mounting seat, and the two are fixedly connected by bolts;

[0007] A rotor main shaft, the outer diameter of the rotor main shaft is matched with the inner diameter of the rotor mounting seat, a plurality of embedded grooves are formed on the outer surface of the rotor main shaft, a positioning assembly is arranged in the embedded groove, and a plurality of positioning holes corresponding to the positioning assembly are formed through the outer side wall of the rotor mounting seat.

[0008] Optionally, the connecting shaft is in the shape of a stepped shaft with a narrow upper part and a wide lower part, the bottom of the connecting shaft is located in the rotor mounting seat, the top end of the rotor mounting seat is open with a diameter matching the diameter of the upper end of the connecting shaft, and the top surface of the rotor mounting seat is provided with first bolt holes, and the bottom of the connecting shaft is provided with second bolt holes corresponding to the first bolt holes.

[0009] Optionally, the bottom of the rotor hub is provided with a reinforcing connecting rod, and the bottom end of the reinforcing connecting rod is fixedly connected with the rotor mounting seat through bolts.

[0010] Optionally, the top surface of the rotor main shaft is provided with a plurality of guide shafts, and the bottom surface of the connecting shaft is provided with guide holes for the guide shafts to be inserted.

[0011] Optionally, the positioning assembly comprises a positioning rod and a positioning sleeve, one end of the positioning rod is provided with a stud section, the stud section is threadedly connected in an embedded groove, the positioning sleeve is sleeved on the outer side of the positioning rod, the outer surface of the positioning rod is provided with a guide rail, the inner surface of the positioning sleeve is provided with a guide groove matched with the guide rail, the inside of the positioning sleeve is further provided with a reset spring, and the two ends of the reset spring are respectively abutted with the inner end of the positioning sleeve and the end of the positioning rod; the outer surface of the positioning sleeve is provided with an annular flange, in a natural state, the reset spring is in a compressed state, and the annular flange is abutted with the inner surface of the rotor mounting seat.

[0012] Optionally, the bottom outer surface of the rotor mounting seat is provided with an external thread, the bottom of the rotor mounting seat is threadedly connected with a driving sleeve, the top inner surface of the driving sleeve is provided with an inclined opening, and the outer end of the positioning sleeve is in a spherical shape.

[0013] Compared with the prior art, the unmanned helicopter quick-release rotor head has the following beneficial effects:

[0014] 1、The rotor main shaft in the utility model is used for fixedly connecting with the output shaft of the driving device, and the rotor mounting seat is connected with the rotor main shaft through the positioning assembly, and specifically, when overhauling, a plurality of bolts do not need to be disassembled, so that the disassembly and maintenance efficiency is improved.

[0015] 2、The utility model discloses a driving sleeve, and specifically, when disassembling the rotor mounting seat, the driving sleeve only needs to be screwed to ascend, and then the rotor mounting seat can be pulled upward with force, so that the disassembly process of the rotor head is further facilitated.

[0016] 3、The utility model discloses a plurality of guide shafts in addition to a plurality of positioning sleeves, and the positioning sleeve and the guide shaft are used for improving the firmness between the rotor main shaft and the rotor mounting seat, and the diameter of the rotor main shaft is matched with the inner diameter of the rotor mounting seat, so that the stability of the rotor head can be fully ensured. BRIEF DESCRIPTION OF DRAWINGS

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

[0018] Figure 2 It is the schematic view of the rotor hub and the rotor main shaft of the utility model;

[0019] Figure 3 It is the sectional view of the rotor main shaft of the utility model;

[0020] Figure 4 It is the sectional view of the rotor main shaft and the rotor mounting seat of the utility model;

[0021] Figure 5 It is the sectional view of the rotor mounting seat and the connecting shaft of the utility model;

[0022] Figure 6 It is Figure 4 The enlarged view of A in the middle.

[0023] In the drawing: 100, rotor hub; 101, blade; 102, connecting shaft; 103, second bolt hole; 104, guide hole; 200, rotor mounting seat; 201, positioning hole; 202, first bolt hole; 300, rotor main shaft; 301, embedded groove; 302, guide shaft; 400, positioning assembly; 401, positioning rod; 402, positioning sleeve; 403, stud section; 404, guide rail; 405, guide groove; 406, return spring; 407, annular flange; 500, reinforcing link; 600, driving sleeve. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model, and 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 the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Please refer to Figure 1 - Figure 6 A quick-release type rotor head of unmanned helicopter, comprising a rotor hub 100, the rotor hub 100 is in a straight line shape, the both ends of the rotor hub 100 are connected with blades 101 through bolts, the bottom end of the rotor hub 100 is connected with a connecting shaft 102 through a bolt, further comprising a rotor mounting seat 200 and a rotor main shaft 300, wherein the bottom end of the rotor main shaft 300 is used for connecting with a driving device inside the unmanned helicopter, so as to provide power for the rotation of the rotor head.

[0026] Further, the rotor mounting seat 200 is a through-cylinder structure, the bottom of the connecting shaft 102 extends into the rotor mounting seat 200, and the two are fixedly connected by bolts; specifically, the connecting shaft 102 is in the shape of a stepped shaft with a narrow upper part and a wide lower part, the bottom of the connecting shaft 102 is located in the rotor mounting seat 200, the top opening diameter of the rotor mounting seat 200 is matched with the upper end diameter of the connecting shaft 102, the top surface of the rotor mounting seat 200 is provided with first bolt holes 202, and the bottom of the connecting shaft 102 is provided with second bolt holes 103 corresponding to the first bolt holes 202. The connecting shaft 102 extends into the rotor mounting seat 200 from bottom to top, and the top end of the connecting shaft 102 extends out of the top opening of the rotor mounting seat 200; since the first bolt holes 202 and the second bolt holes 102 correspond to each other, the two can be conveniently connected.

[0027] In addition, the bottom of the rotor hub 100 is provided with a reinforcing connecting rod 500, and the bottom end of the reinforcing connecting rod 500 is fixedly connected with the rotor mounting seat 200 by bolts. That is, the two ends of the reinforcing connecting rod 500 are fixedly connected with the rotor hub 100 and the rotor mounting seat 200 by bolts, and the reinforcing connecting rod 500 is convenient to disassemble and assemble.

[0028] Further, the outer diameter of the rotor main shaft 300 is matched with the inner diameter of the rotor mounting seat 200, the outer surface of the rotor main shaft 300 is provided with a plurality of embedded grooves 301, the embedded grooves 301 are provided with positioning assemblies 400, and the outer side wall of the rotor mounting seat 200 is provided with positioning holes 201 corresponding to the positioning assemblies 400. The positioning assembly 400 comprises a positioning rod 401 and a positioning sleeve 402, one end of the positioning rod 401 is provided with a stud section 403, the stud section 403 is threadedly connected in the embedded groove 301, the positioning sleeve 402 is sleeved on the outer side of the positioning rod 401, the outer surface of the positioning rod 401 is provided with a guide rail 404, the inner surface of the positioning sleeve 402 is provided with a guide groove 405 matched with the guide rail 404, the inside of the positioning sleeve 402 is further provided with a return spring 406, and the two ends of the return spring 406 are respectively abutted with the inner end of the positioning sleeve 402 and the end of the positioning rod 401; the outer surface of the positioning sleeve 402 is provided with an annular flange 407, in the natural state, the return spring 406 is in a compressed state, and the annular flange 407 is abutted with the inner surface of the rotor mounting seat 200.

[0029] It should be noted that the outer end of the positioning sleeve 402 is in a spherical shape, and in the natural state, the spherical part completely extends out of the outside of the positioning hole 201, and the diameter of the positioning sleeve 402 is matched with the inner diameter of the positioning hole 201; when the positioning sleeve 402 is inserted into the inside of the positioning hole 201, the rotor main shaft 300 can drive the rotor mounting seat 200 and the rotor hub 100 to rotate.

[0030] On the other hand, the top surface of the rotor main shaft 300 is provided with a plurality of guide shafts 302, and the bottom surface of the connecting shaft 102 is provided with guide holes 104 for the insertion of the guide shafts 302; the guide shafts 302 and the guide holes 104 serve to improve the firmness of the connection between the rotor main shaft 300 and the rotor mounting seat 200. The bottom outer surface of the rotor mounting seat 200 is provided with external threads, and the bottom of the rotor mounting seat 200 is threadedly connected with a driving sleeve 600, and the top inner surface of the driving sleeve 600 is provided with a bevel 601. It is worth mentioning that the inner diameter of the top surface of the driving sleeve 600 at the bevel 601 is greater than the distance between the farthest ends of the two positioning sleeves 402 at the opposite positions, that is, when the user rotates the driving sleeve 600 to make it rise, the positioning sleeves 402 can gradually retract inward under the action of the bevel 601, and finally when the outer ends of the positioning sleeves 402 are completely retracted into the positioning holes 201, since the outer ends of the positioning sleeves 402 are spherical, the user can pull the rotor mounting seat 200 upward with force, so as to separate it from the rotor main shaft 300.

[0031] In summary, in the embodiment, when the rotor head is disassembled, the driving sleeve 600 is only rotated to make it rise, thereby indirectly making the positioning sleeves 402 retract into the positioning holes 201, and finally the rotor mounting seat 200 and the rotor hub 100 can be disassembled under the action of external force, so the disassembly is convenient and fast.

[0032] It should be noted that in this document, the terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0033] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A quick-release rotor head for an unmanned helicopter, comprising a rotor hub (100), wherein blades (101) are provided at both ends of the rotor hub (100), and a connecting shaft (102) is provided at the bottom end of the rotor hub (100), characterized in that, Also includes: The rotor mounting base (200) is a cylindrical structure that runs vertically through the rotor. The bottom of the connecting shaft (102) extends into the rotor mounting base (200), and the two are fixedly connected by bolts. The rotor main shaft (300) has an outer diameter that matches the inner diameter of the rotor mounting base (200). The outer surface of the rotor main shaft (300) is provided with a plurality of recessed grooves (301). A positioning component (400) is provided in the recessed groove (301). The outer side wall of the rotor mounting base (200) is provided with positioning holes (201) that correspond one-to-one with the positioning component (400).

2. The quick-release rotor head for an unmanned helicopter according to claim 1, characterized in that: The connecting shaft (102) is a stepped shaft shape that is narrower at the top and wider at the bottom. The bottom of the connecting shaft (102) is located inside the rotor mounting base (200). The top opening diameter of the rotor mounting base (200) is adapted to the upper diameter of the connecting shaft (102). The top surface of the rotor mounting base (200) is provided with a first bolt hole (202). The bottom upper edge of the connecting shaft (102) is provided with a second bolt hole (103) that corresponds one-to-one with the first bolt hole (202).

3. The quick-release rotor head for an unmanned helicopter according to claim 1, characterized in that: The rotor hub (100) is provided with a reinforcing link (500) at the bottom, and the bottom end of the reinforcing link (500) is fixed to the rotor mounting base (200) by bolts.

4. The quick-release rotor head for an unmanned helicopter according to claim 1, characterized in that: The top surface of the rotor main shaft (300) is provided with a plurality of guide shafts (302), and the bottom surface of the connecting shaft (102) is provided with guide holes (104) for the guide shafts (302) to be inserted.

5. The quick-release rotor head for an unmanned helicopter according to claim 1, characterized in that: The positioning assembly (400) includes a positioning rod (401) and a positioning sleeve (402). One end of the positioning rod (401) is provided with a stud section (403), which is threaded into an inner groove (301). The positioning sleeve (402) is sleeved on the outside of the positioning rod (401), and the outer surface of the positioning rod (401) is provided with a guide rail (404). The inner surface of the positioning sleeve (402) is provided with a groove that is compatible with the guide rail (404). The guide groove (405) is provided inside the positioning sleeve (402), and a return spring (406) is provided inside the positioning sleeve (402). The two ends of the return spring (406) abut against the inner end of the positioning sleeve (402) and the end of the positioning rod (401), respectively. The outer surface of the positioning sleeve (402) is provided with an annular flange (407). In the natural state, the return spring (406) is in a compressed state, and the annular flange (407) abuts against the inner surface of the rotor mounting base (200).

6. The quick-release rotor head for an unmanned helicopter according to claim 5, characterized in that: The rotor mounting base (200) has an external thread on its bottom outer surface. The rotor mounting base (200) is threaded to a drive sleeve (600). The drive sleeve (600) has a bevel (601) on its top inner surface. The outer end of the positioning sleeve (402) is spherical.

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