CN209366484U - Unmanned plane main shaft and agricultural unmanned helicopter - Google Patents

Abstract

The utility model discloses a kind of unmanned plane main shaft and agricultural unmanned helicopter, wherein, unmanned plane main shaft includes first segment main shaft, second segment main shaft and shaft coupling, shaft coupling has the first end and second end being oppositely arranged, first segment main shaft is removably attachable to first end, and second segment main shaft is removably attachable to second end.The utility model unmanned plane main shaft combines main shaft by using segmented, main shaft is divided into first segment main shaft and second segment main shaft, and using shaft coupling connection first segment main shaft and second segment main shaft, so that main shaft is divided into three parts, then each part can independent repair and replacement, maintenance time is saved, maintenance cost is reduced.

Description

Unmanned plane main shaft and agricultural unmanned helicopter

Technical field

The utility model relates to air vehicle technique field, in particular to a kind of unmanned plane main shaft and agricultural unmanned helicopter.

Background technique

With the research on the application of unmanned helicopters in various industries, its social production and life various aspects effect increasingly Significantly.Existing unmanned helicopter is all made of integral type main shaft, and integral type main shaft is typical elongated shaft, since required precision is high, Have the shortcomings that processing difficulties, manufacturing cost are high.And the both ends of integral type main shaft are separately installed with main rotor hub and transmission gear, In this way, main rotor hub and section transmission mechanism must be dismounted simultaneously when changing main-spindle, so that changing main-spindle is difficult, heavy workload.

Utility model content

The main purpose of the utility model is to propose a kind of unmanned plane main shaft, it is intended to solve the unmanned owner of traditional integral type The difficult technical problem of maintenance, the replacement of axis.

To achieve the above object, the utility model proposes unmanned plane main shaft, comprising:.

First segment main shaft；

Second segment main shaft；And

Shaft coupling, has the first end and second end being oppositely arranged, and the first segment main shaft is removably attachable to described First end, the second segment main shaft are removably attachable to the second end.

Optionally, the shaft coupling has connecting cavity, and the connecting cavity has in the first of first end setting The conical surface and the second inner conical surface being arranged close to the second end；

The first segment main shaft close to the side of first inner conical surface have the first male cone (strobilus masculinus), first male cone (strobilus masculinus) with The first inner conical surface interference fit, the second segment main shaft have the second male cone (strobilus masculinus) close to the side of second inner conical surface, Second male cone (strobilus masculinus) and first inner conical surface are interference fitted.

Optionally, the first segment main shaft includes the first shaft body and the first tapered sleeve, and first tapered sleeve is sheathed on described The outer peripheral surface of first shaft body, the outer peripheral surface of first tapered sleeve form first male cone (strobilus masculinus)；

The second segment main shaft includes the second shaft body and the second tapered sleeve, and second tapered sleeve is sheathed on the second axis sheet The outer peripheral surface of body, the outer peripheral surface of second tapered sleeve form second male cone (strobilus masculinus).

Optionally, the connecting cavity penetrates through the first end and second end setting, is equipped with limit in the connecting cavity Flange；The unmanned plane main shaft further includes tension part, and the tension part protrudes into the connecting cavity from the second end, the drawing Tight part abuts the defining flange and is connected with the first segment main shaft, so that in first male cone (strobilus masculinus) and described first Conical surface tight fit.

Optionally, the unmanned plane main shaft further includes stop collar, and the stop collar abuts the defining flange close to described The end face of second end, the tension part abut the stop collar and are connected with the first segment main shaft.

Optionally, the unmanned plane main shaft further includes the first locking member, diameter of first locking member along the shaft coupling To the shaft coupling and the first segment main shaft is successively worn, so that the first segment principal shaft locking is on the shaft coupling.

Optionally, the unmanned plane main shaft further includes compressing member；The first end of the shaft coupling is equipped with flange connector, described Flange connector is equipped with matching hole corresponding with the compressing member；Second tapered sleeve includes tapered sleeve ontology and abutment flange, institute Abutment flange is stated equipped with via hole；The compressing member wears the via hole and the matching hole compression fit so that second cone The outer surface of set and the second inner conical surface tight fit.

Optionally, the abutment flange includes the first snap ring and the second snap ring, and the tapered sleeve ontology is equipped with detent flange, institute The first snap ring is stated to be sheathed on the tapered sleeve ontology periphery and be mutually clamped with the detent flange, second snap ring and described first Snap ring and the tapered sleeve ontology are abutted against far from the end face of the second end, and the detent flange is clamped on first card Between ring and second snap ring.

Optionally, the unmanned plane main shaft further includes the second locking member, and second locking member is along the shaft coupling main body Radial direction successively wear the shaft coupling and the second segment main shaft so that the second segment principal shaft locking is in the shaft coupling On.

The utility model also proposes a kind of agricultural unmanned helicopter, including rotor head and transmission mechanism, wherein further including nothing The upper end of man-machine main shaft, the unmanned plane main shaft is connected with the rotor head, the lower end of the unmanned plane and the driver Structure is connected, wherein unmanned plane main shaft includes first segment main shaft, second segment main shaft and shaft coupling, and the shaft coupling has opposite The first end and second end of setting, the first segment main shaft are removably attachable to the first end, and the second segment main shaft can Releasably it is connected to the second end.

The utility model unmanned plane main shaft combines main shaft by using segmented, and main shaft is divided into first segment main shaft and second Section main shaft, and first segment main shaft and second segment main shaft are detachably connected with shaft coupling, so that main shaft is divided into three parts, Then each part can independent repair and replacement, save maintenance time, reduce maintenance cost.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, the structure that can also be shown according to these attached drawings obtains other attached drawings.

Fig. 1 is the structural schematic diagram of one embodiment of the utility model unmanned plane main shaft

Fig. 2 is the decomposition texture schematic diagram of unmanned plane main shaft in Fig. 1；

Fig. 3 is the decomposition texture schematic diagram of the tapered sleeve of unmanned plane main shaft in Fig. 2；

Fig. 4 is the schematic diagram of the section structure of one embodiment of the utility model unmanned plane main shaft；

Fig. 5 is the partial enlarged view in Fig. 4 at A；

Fig. 6 is the partial enlarged view in Fig. 4 at B.

Drawing reference numeral explanation:

The embodiments will be further described with reference to the accompanying drawings for the realization, functional characteristics and advantage of the utility model aim.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describing, it is clear that described embodiment is only a part of the embodiment of the utility model, rather than all Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creative work premise Under every other embodiment obtained, fall within the protection scope of the utility model.

It is to be appreciated that if related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding, Afterwards ...), then directionality instruction is only used for explaining opposite between each component under a certain particular pose (as shown in the picture) Positional relationship, motion conditions etc., if the particular pose changes, directionality instruction is also correspondingly changed correspondingly.

In addition, if relating to the description of " first ", " second " etc. in the utility model embodiment, " first ", " the Two " etc. description is used for description purposes only, and is not understood to indicate or imply its relative importance or is implicitly indicated meaning The quantity of the technical characteristic shown." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one A this feature.In addition, the meaning of the "and/or" occurred in full text is, and including three schemes arranged side by side, by taking " A and/or B " as an example, The scheme met simultaneously including A scheme or B scheme or A and B.In addition, the technical solution between each embodiment can be mutual In conjunction with, but must be based on can be realized by those of ordinary skill in the art, when mutual lance occurs in the combination of technical solution Shield or cannot achieve when, will be understood that the combination of this technical solution is not present, also not in the protection scope of the requires of the utility model Within.

The utility model proposes a kind of unmanned plane main shafts, are suitable for unmanned plane.

In the utility model embodiment, as shown in Figure 1, the unmanned plane main shaft 100, including first segment main shaft 1, second segment Main shaft 2 and shaft coupling 3, shaft coupling 3 have the first end 31 and second end 32 being oppositely arranged, and first segment main shaft 1 is removably It is connected to first end 31, second segment main shaft 2 is removably attachable to second end 32.

In the present embodiment, shaft coupling 3 can select positive coupling 3, yielding coupling 3, flexible coupling 3 etc., only It need to can guarantee the high-axiality of unmanned plane main shaft 100.It is understood that unmanned plane is required to hold in the process of running By larger vibration, frequent positive and negative rotation and more frequently shock loading；Also to guarantee that two shaft assignments are good, reliable operation, therefore Preferably use yielding coupling 3.Elastomeric material is engineering plastics, plays buffering, vibration damping, wear-resisting effect, can compensate for compared with Big axial displacement, micro radial displacement and angular displacement, and it is convenient for disassembly and assembly, it can facilitate axially mounted.

Connection between first segment main shaft 1 and second segment main shaft 2 and shaft coupling 3 can be connected by key, clamped-in style connection and Tensioner ring connection etc. only needs that realization between first segment main shaft 1 and second segment main shaft 2 and shaft coupling 3 can be made to be detachably connected.

The utility model unmanned plane main shaft 100 by using segmented combine main shaft, by main shaft be divided into first segment main shaft 1 and Second segment main shaft 2, and first segment main shaft 1 and second segment main shaft 2 are detachably connected with shaft coupling 3.It then reduces single The length of main shaft, so that the rigidity reinforced of single main shaft, and the difficulty of processing of unmanned plane main shaft 100 is greatly reduced, use is general Logical machining apparatus can ensure the machining accuracy of main shaft.And divide unmanned plane main shaft 100 for three parts, then Each part can independent repair and replacement, save maintenance time, reduce maintenance cost.

Further, please with reference to Fig. 2, fig. 4 to fig. 6, shaft coupling 3 has connecting cavity 33, and connecting cavity 33 has close The first inner conical surface 331 that first end 31 is arranged and the second inner conical surface 332 being arranged close to second end 32；

First segment main shaft 1 has the first male cone (strobilus masculinus) 11, the first male cone (strobilus masculinus) 11 and first close to the side of the first inner conical surface 331 Inner conical surface 331 is interference fitted, and second segment main shaft 2 has the second male cone (strobilus masculinus) 21, the second outer cone close to the side of the second inner conical surface 332 Face 21 and the first inner conical surface 331 are interference fitted.

In the present embodiment, connecting cavity 33 can be the first end 31 of perforation shaft coupling 3 and second end 32 is arranged, can also be with It is only to be arranged in the end of first end 31 and second end 32.It is understood that the first inner conical surface 331 and the second male cone (strobilus masculinus) 21 Taper is identical, and the second inner conical surface 332 is identical with the taper of the second male cone (strobilus masculinus) 21, in this way, first segment main shaft 1 is installed to connecting cavity 33 When interior, the first inner conical surface 331 and the first male cone (strobilus masculinus) 11 mutually interference fit, so that first segment main shaft 1 and the fastening of shaft coupling 3 connect It connects, likewise, second inner conical surface 332 is matched with the mutual interference of the second male cone (strobilus masculinus) 21 when in the installation to connecting cavity 33 of second segment main shaft 2 It closes, so that second segment main shaft 2 is fastenedly connected with shaft coupling 3.It is processed for the ease of unified, it is also possible that the first inner conical surface 331, Second inner conical surface 332, the first male cone (strobilus masculinus) 11, the taper of the second male cone (strobilus masculinus) 21 are all the same.

First male cone (strobilus masculinus) 11 and the second male cone (strobilus masculinus) 21 can be the outer surface shape by first segment main shaft 1 and second segment main shaft 2 At, such as make the processing of the end of first segment main shaft 1 and second segment main shaft 2 tapered, is also possible to by being set in first segment master What the tapered sleeve on axis 1 and second segment main shaft 2 was formed.By making between first segment main shaft 1 and second segment main shaft 2 and shaft coupling 3 Cooperated by adopting conical surface interference, it is easier for installation quick, and connect more firm.And first segment is made using taper centering principle High-axiality connection is realized between main shaft 1 and second segment main shaft 2.

Further, first segment main shaft 1 includes the first shaft body 12 and the first tapered sleeve 13, and the first tapered sleeve 13 is sheathed on first The outer peripheral surface of the outer peripheral surface of shaft body 12, the first tapered sleeve 13 forms the first male cone (strobilus masculinus) 11；

Second segment main shaft 2 includes the second shaft body 22 and the second tapered sleeve 23, and the second tapered sleeve 23 is sheathed on the second shaft body 22 Outer peripheral surface, the outer peripheral surface of the second tapered sleeve 23 forms the second male cone (strobilus masculinus) 21.

In the present embodiment, the first tapered sleeve 13 and the second tapered sleeve 23 can be made of elastic material or rigid material, be Make the effect of vibration reduction and cushioning more preferable, the first tapered sleeve 13 and the second tapered sleeve 23 be preferably made of elastic material.By The first tapered sleeve 13 and the second tapered sleeve 23 are arranged in one shaft body 12 and the second shaft body 22 so that the outer peripheral surface of the first tapered sleeve 13 and The outer peripheral surface of second tapered sleeve 23 forms the first male cone (strobilus masculinus) 11 and the second male cone (strobilus masculinus) 21, then the first shaft body 12 and the second shaft body 22 Just it is tapered not have to processing, common machining apparatus can be used to process, reduce the difficulty of processing of main shaft, and in the first tapered sleeve 13 and second tapered sleeve 23 damage when be conveniently replaceable.

Further, referring to figure 2., Fig. 4 and Fig. 5, connecting cavity 33 penetrates through first end 31 and second end 32 is arranged, connecting cavity Defining flange 333 is equipped in 33；Unmanned plane main shaft 100 further includes tension part 4, and tension part 4 protrudes into connecting cavity 33 from second end 32 Interior, tension part 4 abuts defining flange 333 and is connected with first segment main shaft 1, so that the first male cone (strobilus masculinus) 11 and the first inner conical surface 331 tight fits.

First segment main shaft 1 is mounted in first end 31 when in the present embodiment, due to installation, by passing through connecting cavity 33 The first end 31 and second end 32 of logical shaft coupling 3 are arranged, then tension part 4 can be protruded into connecting cavity 33 from second end 32 with the One section of main shaft 1 connects.It is understood that tension part 4 can directly abut defining flange 333, such as by the way that tension part 4 to be arranged At the structure for having annular flange, limited so that annular flange abuts defining flange 333, then 4 a part of tension part is stretched Defining flange 333, can also be by increasing annular gasket to play the role of limit to be connected with first segment main shaft 1 out.It draws Tight part 4 abuts defining flange 333, is then connected with first segment main shaft 1 so that first segment main shaft 1 is gradually pulled to connecting cavity 33 It is interior, so that 331 tight fit of the first male cone (strobilus masculinus) 11 and the first inner conical surface.Tension part 4 not only can tense first segment main shaft 1 so that Obtain 331 tight fit of the first male cone (strobilus masculinus) 11 and the first inner conical surface, additionally it is possible to play the role of fastening, first segment main shaft 1 can be prevented It falls off when by external force.

In one embodiment, tension part 4 is screw, and the end face of first segment main shaft 1 offers the spiral shell with screw thread cooperation Pit.In this way, screw portion and threaded hole cooperate, by gradually tightening spiral shell after the nut of screw abuts defining flange 333 Nail, so that screw hauls the direction movement that first segment main shaft 1 is increasingly towards second end 32, so that the first male cone (strobilus masculinus) 11 and first 331 tight fit of inner conical surface.

In another embodiment, baffle ring, the first 13 sets of tapered sleeve are equipped with close to the side of first end 31 in the first shaft body 12 When set on the outer peripheral surface of the first shaft body 12, the abutting baffle ring of the first tapered sleeve 13 is close to the end face of first end 31.In this way, tensing When part 4 gradually tenses first segment main shaft 1, since the effect of baffle ring is able to drive the first tapered sleeve 13 gradually to second end 32 It draws in, then in the first tapered sleeve 13 gradually and after 331 tight fit of the first inner conical surface, the first tapered sleeve 13 clamps the first shaft body 12, makes The first shaft body 12, the first tapered sleeve 13, equal tight fit between the first inner conical surface 331, realize it is whole be bonded, and make Being connected up between first segment main shaft 1 and shaft coupling 3 is mutually highly coaxial.Baffle ring can be to be arranged in the first shaft body 12 Flange, can be the first shaft body 12 be arranged the first tapered sleeve 13 part diameter less than the first shaft body 12 remaining is straight Diameter, with shape baffle ring step.

Specifically, unmanned plane main shaft 100 further includes stop collar 131, and stop collar 131 abuts defining flange 333 close to second The end face at end 32, tension part 4 abut stop collar 131 and are connected with first segment main shaft 1.By the way that stop collar 131 is arranged, then make The structure of tension part 4 is simpler, easily facilitates and realizes that tension part 4 is abutted with the limit of defining flange 333, and stop collar 131 It is abutted with defining flange 333 so that contact area is bigger, tension part 4 can bear bigger tightening force when tensing.

Further, unmanned plane main shaft 100 further includes the first locking member 5, the first locking member 5 along shaft coupling 3 it is radial according to It is secondary to wear shaft coupling 3 and first segment main shaft 1, so that first segment main shaft 1 is locked on shaft coupling 3.

In the present embodiment, the first locking member 5 can be bolt or screw etc..By using the first locking member 5 along diameter To connection shaft coupling 3 and first segment main shaft 1, then the connection between first segment main shaft 1 and shaft coupling 3 is further strengthened, so that even It connects more firm.

Further, referring to figure 2., Fig. 4 and Fig. 6, unmanned plane main shaft 100 further include compressing member 4；The first of shaft coupling 3 End 31 is equipped with flange connector 34, and flange connector 34 is equipped with matching hole 341 corresponding with compressing member 4；Second tapered sleeve 23 includes cone Ontology 231 and abutment flange 232 are covered, abutment flange 232 is equipped with via hole 20；Compressing member 4 wears via hole 20 and matching hole 341 is pressed Tight fit so that the second tapered sleeve 23 outer surface and 332 tight fit of the second inner conical surface.

In the present embodiment, compressing member 4 can be screw or bolt etc., be not specifically limited herein, when compressing member 4 is When screw, matching hole 341 is threaded hole, and when compressing member 4 is bolt, matching hole 341 is through-hole.It is worn by using compressing member 4 If via hole 20 and matching hole 341 cooperate so that abutment flange 232 moves closer to flange connector 34, i.e. the second tapered sleeve 23 gradually with Second inner conical surface, 332 tight fit, in this way, the second tapered sleeve 23 also gradually clamps the second shaft body 22, so that the second shaft body 22, Tight fit is realized between two tapered sleeves 23, the second inner conical surface 332, then whole connection is more firm, and makes second segment main shaft 2 Being connected up between shaft coupling 3 is mutually highly coaxial.Abutment flange 232 and tapered sleeve ontology 231 can be integrally formed setting, It is also possible to seperated molding setting.

Further, referring to figure 2., Fig. 3 and Fig. 6, abutment flange 232 includes the first snap ring 30 and the second snap ring 40, cone It covering ontology 231 and is equipped with detent flange 10, the first snap ring 30 is sheathed on 231 periphery of tapered sleeve ontology and is clamped with 10 phase of detent flange, Second snap ring 40 is abutted against with the first snap ring 30 and tapered sleeve ontology 231 far from the end face of second end 32, and detent flange 10 is blocked Tightly between the first snap ring 30 and the second snap ring 40.

In the present embodiment, by the way that detent flange 10 is arranged on tapered sleeve ontology 231, the first snap ring 30 and the second card are used 40 clamping detent flange 10 of ring, then be capable of increasing the contact area of abutment flange 232, convenient for so that compressing member 4 is supported by pushing Ring edge is connect to compress the second tapered sleeve 23 and the second inner conical surface 332.It can be clamped between first snap ring 30 and the second snap ring 40, is be bonded Or it is connected by connector.In one embodiment, the first snap ring 30 connects the second snap ring 40 and is connected by screw to.

Further, unmanned plane main shaft 100 further includes the second locking member 7, diameter of second locking member 7 along 3 main body of shaft coupling To shaft coupling 3 and second segment main shaft 2 is successively worn, so that second segment main shaft 2 is locked on shaft coupling 3.

In the present embodiment, the second locking member 7 can be bolt or screw etc..By using the second locking member 7 along diameter To connection shaft coupling 3 and second segment main shaft 2, then the connection between second segment main shaft 2 and shaft coupling 3 is further strengthened, so that even It connects more firm.In one embodiment, the second locking member 7 and the installation direction of the first locking are on the contrary, in this way, make shaft coupling 3 Upper suffered locking dynamic balance, to guarantee the consistent symmetry of entire main shaft.

The utility model also proposes a kind of agricultural unmanned helicopter, which includes rotor head, driver Structure and unmanned plane main shaft 100, the specific structure of the unmanned plane main shaft 100 referring to above-described embodiment, due to this it is agricultural nobody go straight up to Machine uses whole technical solutions of above-mentioned all embodiments, therefore at least brought by the technical solution with above-described embodiment All beneficial effects, this is no longer going to repeat them.

Wherein, the agricultural unmanned helicopter of the utility model need not dismount main rotor body and portion in changing main-spindle simultaneously Divide transmission mechanism, main shaft is divided into 3 three first segment main shaft 1,32 main shaft of second end and shaft coupling independent sectors, can be individually replaced dimension It repairs, not only makes the processing of main shaft simpler, increase the rigidity of main shaft, and make main shaft repair and replacement more square simultaneously Just.

The above is only the preferred embodiment of the present invention, and therefore it does not limit the scope of the patent of the utility model, It is all under the inventive concept of the utility model, equivalent structure made based on the specification and figures of the utility model becomes It changes, or directly/be used in other related technical areas indirectly and be included in the scope of patent protection of the utility model.

Claims (10)

1. a kind of unmanned plane main shaft characterized by comprising

First segment main shaft；

Second segment main shaft；And

Shaft coupling, has the first end and second end being oppositely arranged, and the first segment main shaft is removably attachable to described first End, the second segment main shaft are removably attachable to the second end.

2. unmanned plane main shaft as described in claim 1, which is characterized in that the shaft coupling has connecting cavity, the connecting cavity With the first inner conical surface close to first end setting and the second inner conical surface close to second end setting；

The first segment main shaft close to the side of first inner conical surface have the first male cone (strobilus masculinus), first male cone (strobilus masculinus) with it is described First inner conical surface interference fit, the second segment main shaft has the second male cone (strobilus masculinus) close to the side of second inner conical surface, described Second male cone (strobilus masculinus) and first inner conical surface are interference fitted.

3. unmanned plane main shaft as claimed in claim 2, which is characterized in that the first segment main shaft includes the first shaft body and the One tapered sleeve, first tapered sleeve are sheathed on the outer peripheral surface of first shaft body, and the outer peripheral surface of first tapered sleeve forms described First male cone (strobilus masculinus)；

The second segment main shaft includes the second shaft body and the second tapered sleeve, and second tapered sleeve is sheathed on second shaft body Outer peripheral surface, the outer peripheral surface of second tapered sleeve form second male cone (strobilus masculinus).

4. unmanned plane main shaft as claimed in claim 2, which is characterized in that the connecting cavity penetrates through the first end and described the The setting of two ends, the connecting cavity is interior to be equipped with defining flange；The unmanned plane main shaft further includes tension part, and the tension part is described in Second end protrudes into the connecting cavity, and the tension part abuts the defining flange and is connected with the first segment main shaft, with So that first male cone (strobilus masculinus) and the first inner conical surface tight fit.

5. unmanned plane main shaft as claimed in claim 4, which is characterized in that the unmanned plane main shaft further includes stop collar, described Stop collar abuts the defining flange close to the end face of the second end, and the tension part abuts the stop collar and with described the One section of main shaft is connected.

6. unmanned plane main shaft as described in claim 1, which is characterized in that the unmanned plane main shaft further includes the first locking member, First locking member successively wears the shaft coupling and the first segment main shaft along the radial direction of the shaft coupling, so that described First segment principal shaft locking is on the shaft coupling.

7. unmanned plane main shaft as claimed in claim 3, which is characterized in that the unmanned plane main shaft further includes compressing member；It is described The first end of shaft coupling is equipped with flange connector, and the flange connector is equipped with matching hole corresponding with the compressing member；Described Two tapered sleeves include tapered sleeve ontology and abutment flange, and the abutment flange is equipped with via hole；The compressing member wear the via hole with The matching hole compression fit is so that the outer surface of second tapered sleeve and the second inner conical surface tight fit.

8. unmanned plane main shaft as claimed in claim 7, which is characterized in that the abutment flange includes the first snap ring and the second card Ring, the tapered sleeve ontology are equipped with detent flange, and first snap ring is sheathed on the tapered sleeve ontology periphery and turns over the detent Side is mutually clamped, and second snap ring is abutted against with first snap ring and the tapered sleeve ontology far from the end face of the second end, The detent flange to be clamped between first snap ring and second snap ring.

9. unmanned plane main shaft as described in claim 1, which is characterized in that the unmanned plane main shaft further includes the second locking member, Second locking member successively wears the shaft coupling and the second segment main shaft along the radial direction of the shaft coupling main body, so that The second segment principal shaft locking is on the shaft coupling.

10. a kind of agricultural unmanned helicopter, including rotor head and transmission mechanism, which is characterized in that further include such as claim 1-9 Any one of described in unmanned plane main shaft, the upper end of the unmanned plane main shaft is connected with the rotor head, the unmanned plane Lower end be connected with the transmission mechanism.