CN214930666U

CN214930666U - Main shaft structure of internal combustion engine unmanned helicopter

Info

Publication number: CN214930666U
Application number: CN202121712735.9U
Authority: CN
Inventors: 施学峰; 肖弥
Original assignee: Siyong Machinery Shanghai Co ltd
Current assignee: Siyong Machinery Shanghai Co ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2021-11-30
Anticipated expiration: 2031-07-26

Abstract

The utility model discloses a main shaft structure of unmanned helicopter of internal-combustion engine, include: the main shaft is vertically arranged and is provided with a lower end and an upper end used for connecting a main rotor head of the unmanned helicopter; the driving wheel is used for connecting a belt to a driving mechanism of the unmanned helicopter and is arranged at the lower end of the main shaft, and the driving wheel and the lower end of the main shaft are coaxially arranged; and the protective axle box is detachably arranged on the frame of the unmanned helicopter, a gap for the belt to penetrate is formed at the side part of the protective axle box, two coaxially arranged axle holes are respectively formed at the top and the bottom of the protective axle box, bearings are respectively arranged in the two axle holes, and the lower end of the main shaft penetrates through the bearings in the two axle holes. The utility model provides a main shaft of unmanned helicopter of internal-combustion engine directly install separately through a plurality of bearings and fix the different positions in the frame, lead to the problem of the main shaft of poor, the life weak point of installation precision and unable change alone of main shaft.

Description

Main shaft structure of internal combustion engine unmanned helicopter

Technical Field

The utility model relates to an unmanned helicopter technical field of internal-combustion engine, concretely relates to unmanned helicopter of internal-combustion engine's main shaft structure.

Background

The internal combustion engine unmanned helicopter is an emerging field, and related technologies are few. The main shaft of the internal combustion engine unmanned helicopter is fixed and restrained by a bearing which is directly arranged and fixed on the frame, and different bearing blocks are respectively arranged at different positions of the frame. Therefore, the main shaft is poor in installation accuracy, and the service life of the internal combustion engine unmanned helicopter is short.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, a main shaft structure of the internal combustion engine unmanned helicopter is provided so as to solve the problems that the main shaft of the internal combustion engine unmanned helicopter is directly and respectively installed and fixed at different positions on a rack through a plurality of bearings, so that the main shaft is poor in installation precision, short in service life and incapable of being independently replaced.

In order to achieve the above object, there is provided a main shaft structure of an internal combustion engine unmanned helicopter, comprising:

the main shaft is vertically arranged and is provided with a lower end and an upper end used for connecting a main rotor head of the unmanned helicopter;

the driving wheel is used for connecting a belt to a driving mechanism of the unmanned helicopter and is arranged at the lower end of the main shaft, and the driving wheel and the lower end of the main shaft are coaxially arranged; and

the protection shaft box is detachably installed on a rack of the unmanned helicopter, a notch is formed in the side portion of the protection shaft box and is used for the belt to penetrate, two shaft holes which are coaxially arranged are formed in the top portion and the bottom portion of the protection shaft box respectively, two bearings are installed in the shaft holes respectively, and the lower end of the main shaft penetrates through the two bearings in the shaft holes.

Further, the device also comprises a driven wheel arranged outside the protective axle box, the lower end of the main shaft extends to the lower part of the protective axle box, and the driven wheel is coaxially arranged at the lower end of the main shaft.

Furthermore, the lower extreme detachably of main shaft installs the locating part, the locating part support in from the driving wheel.

Furthermore, the upper end of the shaft hole is provided with a limit flange plate which is pressed against the upper end of the bearing, a circle of limit flange plate is arranged along the circumferential direction of the shaft hole, the bottom of the protection shaft box is detachably provided with a pressing plate, and the pressing plate is supported at the lower end of the bearing in the shaft hole at the bottom of the protection shaft box.

Further, the main shaft has lower shaft section, is used for connecting the last shaft section of main rotor head and connect in go up the shaft section with reducing changeover portion between the shaft section down, the external diameter of going up the shaft section is greater than the external diameter of lower shaft section, the action wheel install in lower shaft section, the downthehole bearing of the shaft at the top of protection axle box install in go up the shaft section, reducing changeover portion cover is equipped with the axle sleeve, go up the axle sleeve support in the upper portion of action wheel with the downthehole bearing of the shaft at the top of protection axle box, lower shaft section cover is equipped with lower axle sleeve, lower axle sleeve support in the lower part of action wheel with the bearing in the shaft hole of the bottom of protection axle box.

Further, the protection axle box comprises a bottom plate, a top plate and arc-shaped side plates, the shaft holes are formed in the bottom plate and the top plate, two opposite sides of each arc-shaped side plate are connected between the bottom plate and the top plate, and the gaps are formed between two opposite ends of each arc-shaped side plate.

Further, the protection axle box is integrally formed.

The beneficial effects of the utility model reside in that, the utility model discloses a main shaft structure of unmanned helicopter of internal-combustion engine installs main shaft, each bearing and action wheel integration on the protection axle box, again with protection axle box detachably install in the frame of unmanned helicopter, has improved the protection to the main shaft, has simplified the installation of main shaft, has reduced cost of maintenance and time for the performance of aircraft is more stable, has reduced the possibility that non-essential element influences aircraft flight. In addition, the coaxiality of the upper bearing and the lower bearing can be guaranteed by the integral protective axle box, the mounting precision of the main shaft is improved, even if the rack deforms, the integral protective axle box can displace along with the deformation of the rack, the coaxiality of the main shaft and the two bearings cannot be influenced, the airplane can still normally fly, and the service life of the airplane is prolonged.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 is a schematic structural diagram of a main shaft structure of an internal combustion engine unmanned helicopter according to an embodiment of the present invention.

Fig. 2 is a sectional view of the main shaft structure of the internal combustion engine unmanned helicopter according to the embodiment of the present invention.

Fig. 3 is a schematic structural diagram of the spindle according to the embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a protective axle box according to an embodiment of the present invention.

Fig. 5 is a schematic view of a mounting state of a main shaft structure of the unmanned helicopter with internal combustion engine according to the embodiment of the present invention.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 to 5, the utility model provides a main shaft structure of unmanned helicopter of internal-combustion engine, include: main shaft 1, driving wheel 2 and protective axle box 3.

Wherein the main shaft 1 is vertically arranged. Specifically, the main shaft 1 has a lower end and an upper end. The upper end of the main shaft is used for connecting a main rotor head of the unmanned helicopter.

The driving wheel 2 is arranged at the lower end of the main shaft 1. The driving wheel 2 is coaxially arranged with the lower end of the main shaft 1. The driving wheel 2 is used for connecting a belt to a driving mechanism of the unmanned helicopter so as to drive the main shaft to rotate.

The protective shaft box 3 is used for being detachably mounted on a frame 6 of the unmanned helicopter. The side of the protective axle box 3 is formed with a gap for the belt to pass through. The middle part of the belt penetrates through the notch, one end of the belt is sleeved on the driving wheel of the driving mechanism, the other end of the belt is sleeved on the driving wheel, and the driving mechanism is connected with the driving wheel through belt transmission to drive the driving wheel to rotate. In the present embodiment, the drive mechanism is an internal combustion engine.

Two shaft holes are coaxially formed at the top and the bottom of the protective shaft housing 3, respectively. Bearings 35 are respectively installed in the two shaft holes. The lower end of the main shaft 1 is inserted into a bearing 35 in the shaft hole at the bottom of the protection shaft housing 3.

In the present embodiment, the shielded axle boxes 3 include a bottom plate 31, a top plate 32, and arc-shaped side plates 33. The bottom plate and the top plate are respectively arranged along the horizontal direction. The bottom plate 31 and the top plate 32 are provided with shaft holes. The opposite sides of the arc-shaped side plates 33 are connected between the bottom plate 31 and the top plate 32. The inner arc surface of the arc-shaped side plate faces the driving wheel. Furthermore, the radian of the inner arc surface of the arc-shaped side plate is matched with the radian of the circumferential surface of the driving wheel. The arcuate side plates 33 are notched at opposite ends thereof.

The bottom plate, the top plate and the arc-shaped side plates of the protective axle box are made of aluminum alloy materials and are formed in a welding mode or an integrated mode, the influence of non-critical parts of a main shaft of the unmanned helicopter on the performance of the helicopter is reduced, the probability of serious accidents such as incapability of flying and machine explosion caused by failure of the non-critical parts is reduced, meanwhile, the protection on the main shaft is enhanced, and therefore the reliability and the service life of the unmanned helicopter are improved.

In this embodiment, the upper port of the shaft hole of the top plate is formed with a limit flange plate 37 pressed against the upper end of the bearing 35, and the limit flange plate 37 is arranged in a circle along the circumferential direction of the shaft hole. The upper port of the shaft hole of the bottom plate of the protective shaft box forms a limiting flange plate 37, and the limiting flange plate is pressed against the upper end of the bearing 35 in the shaft hole of the bottom plate of the protective shaft box 3. Specifically, the upper ports of the shaft holes of the bottom plate and the top plate form annular limiting flange plates respectively so as to prevent the bearing from sliding upwards to be separated from the shaft hole.

A platen 34 is removably mounted to the guard axle housing. The pressure plate 34 is supported at the lower end of the bearing in the shaft hole at the bottom of the shielded axle housing. Specifically, the pressing plate 34 is provided with a through hole, and the lower end of the lower shaft section of the main shaft is inserted into the through hole. The inner edge of the pressure plate is pressed against the lower end of the bearing in the shaft hole of the bottom plate of the protective shaft box, and the outer edge of the pressure plate is detachably connected to the bottom plate through a bolt.

In a preferred embodiment, the main shaft 1 comprises an upper shaft section 11, a reducing transition section 12 and a lower shaft section 13.

In particular, the upper shaft section 11 is used for connecting the main rotor head. The reducing transition section 12 is connected between the upper shaft section 11 and the lower shaft section 13. Wherein the outer diameter of the upper shaft section 11 is larger than the outer diameter of the lower shaft section 13. The driving wheel 2 is mounted on the lower shaft section 13. The bearing 35 in the shaft hole of the ceiling of the head plate of the shielded axle box 3 is attached to the upper shaft segment 11. The reducing transition section 12 is sleeved with an upper shaft sleeve 36. The upper shaft sleeve is supported by a bearing 35 in the shaft hole at the top of the guard shaft box 3 and the upper part of the driving wheel 2. The lower shaft section 13 is sleeved with a lower shaft sleeve 38. The lower sleeve is supported by a bearing 35 in the shaft hole of the bottom plate of the guard shaft case 3 and the lower portion of the drive pulley 2.

As a preferred embodiment, the main shaft structure of the internal combustion engine unmanned helicopter of the present invention further includes a driven wheel 4. The driven wheel 4 is disposed outside the shielded axle box 3. The lower end of the main shaft 1 extends below the protective axle housing 3. The driven wheel 4 is coaxially mounted on the lower end of the main shaft 1. Furthermore, the number of the driven wheels is multiple, and the driven wheels are coaxially arranged at the lower end of the main shaft along the axial direction of the main shaft.

The utility model discloses an unmanned helicopter of internal-combustion engine's main shaft structure's actuating mechanism passes through the belt and drives the action wheel, and the action wheel drives the main shaft, and the main rotor is driven again to the main shaft, has realized the modularization of main shaft system to demolish and install action wheel, main shaft, steering wheel, rotor head, whole follow planes such as cross dish, provide the guarantee for industrial production.

In a preferred embodiment, a limiting member 5 is detachably mounted on the lower end of the main shaft 1, and the limiting member 5 is supported by the driven wheel 4. The upper end of the driven wheel is abutted against the bottom of the pressing plate. In this embodiment, the limiting member 5 is formed with a threaded through hole, and the limiting member 5 is a nut. The lower end of the lower shaft section of the main shaft is provided with external threads. The thread through hole of the limiting part is provided with an internal thread, and the internal thread is matched with the external thread of the lower shaft section of the main shaft. The thread through hole of the limiting part is screwed at the lower end of the lower shaft section and is pressed against the bottom of the driven wheel.

The utility model discloses a main shaft of unmanned helicopter of internal-combustion engine's main shaft structure is its from last down running through in the protection axle box for a reducing shaft, and spindle nose portion is used for installing main rotor head, sets up the installation position of upper bearing at the end of the upper shaft section of main shaft. The lower part of the mounting position of the upper bearing is a reducing transition section, the outer diameter of the reducing transition section is gradually reduced from top to bottom, wherein the outer diameter of the upper end of the reducing transition section is matched with the outer diameter of the upper shaft section, and the outer diameter of the lower end of the reducing transition section is matched with the outer diameter of the lower shaft section. The diameter-variable transition section is provided with an upper shaft sleeve for propping an upper bearing and pressing a driving wheel, and the driving wheel is connected with a main shaft by using double keys. The lower shaft sleeve below the driving wheel is used for supporting the driving wheel, and the lower bearing is arranged below the lower shaft sleeve. The lower part of the lower bearing is used for installing a driven wheel, and finally the lower end of the main shaft is locked by a limiting piece (a nut). Because the diameter of the upper bearing is larger than the size of the mounting key of the lower shaft section of the main shaft, the main shaft can be pulled out from the protective shaft box after the limiting part (nut) is loosened or disassembled and the driven wheel is disassembled, so that the main shaft can be quickly replaced. Therefore, the main shaft system of the unmanned helicopter can be conveniently replaced on site, the maintenance cost is reduced, the main shaft can be independently replaced on site, and the maintenance efficiency is improved.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. A main shaft structure of an internal combustion engine unmanned helicopter is characterized by comprising:

2. The main shaft structure of an internal combustion engine unmanned helicopter of claim 1, further comprising a driven wheel disposed outside the protective axle box, wherein the lower end of the main shaft extends below the protective axle box, and the driven wheel is coaxially mounted to the lower end of the main shaft.

3. The main shaft structure of an internal combustion engine unmanned helicopter of claim 2, characterized in that a stopper is detachably mounted to a lower end of the main shaft, and the stopper is supported by the driven wheel.

4. The main shaft structure of the unmanned helicopter with internal combustion engine according to claim 1, wherein a limit flange plate is formed at the upper end of the shaft hole and presses against the upper end of the bearing, the limit flange plate is provided with a circle along the circumferential direction of the shaft hole, a pressing plate is detachably mounted at the bottom of the protection shaft box, and the pressing plate is supported at the lower end of the bearing in the shaft hole at the bottom of the protection shaft box.

5. The main shaft structure of the unmanned helicopter of internal combustion engine of claim 4, wherein the main shaft has a lower shaft section, an upper shaft section for connecting the main rotor head, and a reducing transition section connected between the upper shaft section and the lower shaft section, the outer diameter of the upper shaft section is greater than the outer diameter of the lower shaft section, the driving wheel is installed in the lower shaft section, a bearing in a shaft hole at the top of the protective shaft box is installed in the upper shaft section, the reducing transition section is sleeved with an upper shaft sleeve, the upper shaft sleeve is supported by the upper portion of the driving wheel and the bearing in the shaft hole at the top of the protective shaft box, the lower shaft sleeve is sleeved with a lower shaft sleeve, and the lower shaft sleeve is supported by the lower portion of the driving wheel and the bearing in the shaft hole at the bottom of the protective shaft box.

6. The mast structure of an internal combustion engine unmanned helicopter of claim 1, wherein the protective axle housing comprises a bottom plate, a top plate and an arc-shaped side plate, the bottom plate and the top plate define the axle hole, opposite sides of the arc-shaped side plate are connected between the bottom plate and the top plate, and the gap is formed between opposite ends of the arc-shaped side plate.

7. The mast structure of an internal combustion engine unmanned helicopter of claim 1, wherein the protective axle housing is integrally formed.