CN105398572A - Speed-variable transmission mechanism of small single-rotor unmanned helicopter - Google Patents
Speed-variable transmission mechanism of small single-rotor unmanned helicopter Download PDFInfo
- Publication number
- CN105398572A CN105398572A CN201510872083.8A CN201510872083A CN105398572A CN 105398572 A CN105398572 A CN 105398572A CN 201510872083 A CN201510872083 A CN 201510872083A CN 105398572 A CN105398572 A CN 105398572A
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- Prior art keywords
- wheel
- clutch
- tail
- transmission mechanism
- transmission
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/04—Helicopters
- B64C27/12—Rotor drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/04—Helicopters
- B64C27/12—Rotor drives
- B64C2027/125—Rotor drives including toroidal transmissions, e.g. of the CVT type
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a speed-variable transmission mechanism of a small single-rotor unmanned helicopter. The speed-variable transmission mechanism of the small single-rotor unmanned helicopter comprises an engine, a transmission box and a tail gear box, wherein the transmission box comprises a box base and a box upper cover; the box upper cover is sealed and mounted on the box base; an inner cavity is formed between the box upper cover and the box base; the speed-variable transmission mechanism also comprises a first-stage transmission mechanism, a tail rotor mechanism and a propeller mechanism. The speed-variable transmission mechanism of the small single-rotor unmanned helicopter has the advantages that a transmission system only has second-stage transmission, and tail rotors and propellers gain power from the second-stage transmission; compared with three-stage transmission of the speed-variable transmission mechanism of the small single-rotor unmanned helicopter in the prior art, the transmission grade number is reduced, the transmission noise is reduced, the transmission efficiency is improved, the parts are reduced, the weight is reduced, and the load of the engine during the flight is reduced. The transmission box part only comprises the first-stage transmission, so that the vibration during running is reduced; the interference of the vibration on electronic equipment is reduced; the safety and reliability of the flight is guaranteed.
Description
Technical field
The present invention relates to driving system, particularly a kind of small-sized single rotor unmanned helicopter variable transmission mechanism.
Background technology
Depopulated helicopter has maneuverability, and landing is convenient, can hovering, the advantages such as flying speed is controlled, is widely used in military affairs, agricultural and the field such as civilian.
Current extreme low-altitude small-sized single rotor magnetic tape trailer rotor unmanned helicopter adopts small-size double cylinder opposed type air-cooled engine to be used as power, its variable ratio drive system passes through V belt translation (one-level speed change) by transmission of power to change speed gear box, be provided with secondary and three-stage speed change mechanism in change speed gear box, main rotor and tail rotor obtain power from secondary and three-step gear shift respectively.
The weak point of variable ratio drive system is: transmission progression is more reaches three grades, thus causes drive noise large, the problem that driving efficiency is low.And the complex structure of this driving system, complete machine weight is comparatively large, and during flight, engine load is higher; Transmission components has two-stage transmission, and during operation, vibrations are comparatively large, produces interference, affect flight safety reliability to flight electronics.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, and a kind of small-sized single rotor unmanned helicopter variable transmission mechanism is provided.The driving system driving efficiency it solving existing small-sized single rotor magnetic tape trailer rotor unmanned helicopter is low, noise large, larger, the baroque problem of vibrations.
Technical scheme of the present invention is: small-sized single rotor unmanned helicopter variable transmission mechanism, comprises driving engine, change speed gear box and coda wave case; Change speed gear box comprises case base and box cover, and box cover sealing is arranged on case base and also and between case base forms inner chamber; Also comprise primary transmission mechanism, tail rotor mechanism and propeller mechanism;
Primary transmission mechanism comprises preamble wheel, rear synchronizing wheel, primary axis, input gear and tail front-wheel;
Preamble wheel associates with the arbor of driving engine and rotates with arbor, preamble wheel is rotated by synchronizing wheel after belt drive, rear synchronizing wheel is set with and is fixed on primary axis, primary axis two ends are supported respectively and are arranged on case base and box cover, primary axis lower end is stretched out from inner chamber, and tail front-wheel is arranged on primary axis lower end and is positioned at outside inner chamber; Input gear to be arranged on primary axis and to be arranged in inner chamber;
Tail rotor mechanism comprises tail trailing wheel and tail rotor axle; Tail front-wheel in primary transmission mechanism is by belt drive tail rear wheel, and tail trailing wheel is arranged on tail rotor axle, and tail rotor axle two ends are arranged on coda wave case by bearing;
Propeller mechanism comprises output gear and prop shaft; Input gear in primary transmission mechanism engages with output gear, and output gear is arranged on prop shaft, and prop shaft two ends are supported respectively and are arranged on case base and box cover, and its upper end is stretched out from inner chamber.
The further technical scheme of the present invention is: it also comprises the tension pulley mechanism for the belt between tensioning tail front-wheel and tail trailing wheel; Tension pulley mechanism comprises tension wheel shaft, tension wheel, permanent seat; Tension wheel shaft upper end is arranged in the waist hole of case base, and lower end is stretched out from the axis hole permanent seat, and permanent seat is connected to the lower end of case base, and tension wheel to be arranged on tension wheel shaft by bearing and to be positioned at the lower end of permanent seat.
The present invention further technical scheme is: the arbor of driving engine to be taken turns with preamble by clutch pack and associated; Clutch pack comprises startup fluted disc, adapter shaft, clutch block, clutch bearing and clutch base; Arbor and the adapter shaft of driving engine are affixed, start fluted disc be set with and be fixed on the arbor of driving engine, clutch base is fixedly connected with startup fluted disc, clutch block is sleeved on the slideway of clutch base, clutch bearing to be sleeved on adapter shaft and to be located in the axial direction, preamble wheel top is sleeved on outside clutch bearing, and be provided with the friction ring matched with the friction face of clutch block in the inwall of its underpart, clutch block and clutch base are accommodated in the inner by its underpart; When the arbor rotating speed of driving engine is lower than definite value, clutch block is not taken turns with preamble and is contacted, and namely transmission is separated; When the arbor rotating speed of driving engine is higher than definite value, clutch block is subject to centrifugal action, and centnifugal force makes clutch block move on clutch base slideway to take turns with preamble to fit, and namely transmission engages.
The present invention compared with prior art tool has the following advantages:
1, driving system only has secondary transmission, and tail rotor and screw propeller all obtain power from secondary transmission.Compare three grades of transmissions of existing small-sized single rotor unmanned helicopter variable transmission mechanism, transmission progression reduces, and drive noise reduces, and driving efficiency promotes, and parts reduce, and weight saving, reduces the load of driving engine during flight.Transmission components only comprises primary transmission, and during operation, vibrations reduce, and reduces the interference of vibrations to electronic machine, ensures flight safety reliability.
2, realize engine crankshaft by clutch pack and to reach after certain rotating speed just outputting power, make engine starting more smooth and easy, the waste of power unloading phase of reduction.Realized by clutch block: when the arbor rotating speed of driving engine is separated lower than transmission during definite value, the arbor rotating speed of driving engine engages higher than transmission during definite value.Under transmission released state, the arbor of driving engine drives adapter shaft and clutch bearing to rotate, and preamble wheel does not rotate.Under transmission engagement state, clutch block is taken turns with preamble and is engaged, thus is gone out by transmission of power.
Below in conjunction with figure and embodiment the invention will be further described.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the three-dimensional structure diagram after the present invention removes box cover;
Fig. 3 be Fig. 2 B direction view and for representing tail rotor mechanism and tension pulley mechanism.
Illustrate: in Fig. 2, belt and tail rotor mechanism do not draw.
Detailed description of the invention
Embodiment 1:
As shown in Figure 1: small-sized single rotor unmanned helicopter variable transmission mechanism, comprises driving engine 1, change speed gear box and coda wave case 3 (being arranged in the frame of depopulated helicopter), primary transmission mechanism, tail rotor mechanism, propeller mechanism and tension pulley mechanism.
Change speed gear box (being arranged in the frame of depopulated helicopter) comprises case base 21 and box cover 22, and box cover 22 sealing is arranged on case base 21 and also and between case base 21 forms inner chamber 23.
Primary transmission mechanism comprises preamble wheel 41, rear synchronizing wheel 42, primary axis 43, input gear 45 and tail front-wheel 46 (as shown in Figure 2).Preamble wheel 41 is associated with the arbor 11 of driving engine 1 by clutch pack, preamble wheel 41 drives rear synchronizing wheel 42 to rotate by belt 47, rear synchronizing wheel 42 is set with and is fixed in primary axis 43, primary axis 43 two ends are supported respectively and are arranged on case base 21 and box cover 22, primary axis 43 lower end is stretched out from inner chamber 23, and tail front-wheel 46 is arranged on primary axis 43 lower end and is positioned at outside inner chamber 23.Input gear 45 to be arranged on primary axis 43 and to be arranged in inner chamber 23.
Clutch pack comprises startup fluted disc 71, adapter shaft 72, clutch block 73, clutch bearing 74 and clutch base 75; The arbor 11 of driving engine 1 is affixed with adapter shaft 72, start fluted disc 71 be set with and be fixed on the arbor 11 of driving engine 1, clutch base 75 is bolted to connection with startup fluted disc 71, clutch block 73 is sleeved on the slideway of clutch base 75, clutch bearing 74 to be sleeved on adapter shaft 72 and to be located in the axial direction, preamble wheel 41 is sleeved on outside clutch bearing 74, be provided with the friction ring matched with the friction face of clutch block 73 in the inwall of its underpart, clutch block 73 and clutch base 75 are accommodated in the inner by its underpart.When arbor 11 rotating speed of driving engine 1 is lower than definite value, the centnifugal force that clutch block 73 is subject to is not enough to make it move on clutch base 75 slideway, and clutch block 73 is not taken turns 41 with preamble and contacted, and namely transmission is separated; When arbor 11 rotating speed of driving engine 1 is higher than definite value, clutch block 73 is subject to centrifugal action, centnifugal force makes clutch block 73 move on clutch base 75 slideway to take turns 41 with preamble to fit, be that the friction ring that 41 lower inner wall are taken turns in the friction face of clutch fast 73 and preamble is fitted specifically, namely transmission engages.
Tail rotor mechanism comprises tail trailing wheel 51 and tail rotor axle 52.Tail front-wheel 46 in primary transmission mechanism drives tail trailing wheel 51 to rotate by belt 53, and tail trailing wheel 51 is arranged on tail rotor axle 52, and tail rotor axle 52 two ends are arranged on coda wave case 3 by bearing.
Propeller mechanism comprises output gear 61 and prop shaft 62.Input gear 45 in primary transmission mechanism engages with output gear 61, and output gear 61 is arranged on prop shaft 62, and prop shaft 62 two ends are supported respectively and are arranged on case base 21 and box cover 22, and its upper end is stretched out from inner chamber 23.
Tension pulley mechanism is used for the belt 53 between tensioning tail front-wheel 46 and tail trailing wheel 51, and it comprises tension wheel shaft 81, tension wheel 82, permanent seat 83.Tension wheel shaft 81 upper end is arranged in the waist hole of case base 21, and lower end is stretched out from the axis hole permanent seat 83, and permanent seat 83 is connected to the lower end of case base 21, and tension wheel 82 to be arranged on tension wheel shaft 81 by bearing and to be positioned at the lower end of permanent seat 83.
Sketch drive path of the present invention: as shown in Figure 1: when driving engine 1 runs, one road power is successively by preamble wheel 41, belt 47, rear synchronizing wheel 42, primary axis 43, input gear 45 and output gear 61, be passed to prop shaft 62, to drive propeller rotational; Another road power is successively by preamble wheel 41, belt 47, rear synchronizing wheel 42, primary axis 43, tail front-wheel 46 (as shown in Figure 2), belt 53 and tail trailing wheel 51, be passed to tail rotor axle 52 (as shown in Figure 3), rotate to drive tail rotor.
Claims (3)
1. small-sized single rotor unmanned helicopter variable transmission mechanism, comprises driving engine, change speed gear box and coda wave case; Change speed gear box comprises case base and box cover, and box cover sealing is arranged on case base and also and between case base forms inner chamber; It is characterized in that: also comprise primary transmission mechanism, tail rotor mechanism and propeller mechanism;
Primary transmission mechanism comprises preamble wheel, rear synchronizing wheel, primary axis, input gear and tail front-wheel;
Preamble wheel associates with the arbor of driving engine and rotates with arbor, preamble wheel is rotated by synchronizing wheel after belt drive, rear synchronizing wheel is set with and is fixed on primary axis, primary axis two ends are supported respectively and are arranged on case base and box cover, primary axis lower end is stretched out from inner chamber, and tail front-wheel is arranged on primary axis lower end and is positioned at outside inner chamber; Input gear to be arranged on primary axis and to be arranged in inner chamber;
Tail rotor mechanism comprises tail trailing wheel and tail rotor axle; Tail front-wheel in primary transmission mechanism is by belt drive tail rear wheel, and tail trailing wheel is arranged on tail rotor axle, and tail rotor axle two ends are arranged on coda wave case by bearing;
Propeller mechanism comprises output gear and prop shaft; Input gear in primary transmission mechanism engages with output gear, and output gear is arranged on prop shaft, and prop shaft two ends are supported respectively and are arranged on case base and box cover, and its upper end is stretched out from inner chamber.
2. small-sized single rotor unmanned helicopter variable transmission mechanism as claimed in claim 1, is characterized in that: it also comprises the tension pulley mechanism for the belt between tensioning tail front-wheel and tail trailing wheel; Tension pulley mechanism comprises tension wheel shaft, tension wheel, permanent seat; Tension wheel shaft upper end is arranged in the waist hole of case base, and lower end is stretched out from the axis hole permanent seat, and permanent seat is connected to the lower end of case base, and tension wheel to be arranged on tension wheel shaft by bearing and to be positioned at the lower end of permanent seat.
3. small-sized single rotor unmanned helicopter variable transmission mechanism as claimed in claim 1 or 2, is characterized in that: the arbor of driving engine to be taken turns with preamble by clutch pack and associated; Clutch pack comprises startup fluted disc, adapter shaft, clutch block, clutch bearing and clutch base; Arbor and the adapter shaft of driving engine are affixed, start fluted disc be set with and be fixed on the arbor of driving engine, clutch base is fixedly connected with startup fluted disc, clutch block is sleeved on the slideway of clutch base, clutch bearing to be sleeved on adapter shaft and to be located in the axial direction, preamble wheel top is sleeved on outside clutch bearing, and be provided with the friction ring matched with the friction face of clutch block in the inwall of its underpart, clutch block and clutch base are accommodated in the inner by its underpart; When the arbor rotating speed of driving engine is lower than definite value, clutch block is not taken turns with preamble and is contacted, and namely transmission is separated; When the arbor rotating speed of driving engine is higher than definite value, clutch block is subject to centrifugal action, and centnifugal force makes clutch block move on clutch base slideway to take turns with preamble to fit, and namely transmission engages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510872083.8A CN105398572A (en) | 2015-12-03 | 2015-12-03 | Speed-variable transmission mechanism of small single-rotor unmanned helicopter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510872083.8A CN105398572A (en) | 2015-12-03 | 2015-12-03 | Speed-variable transmission mechanism of small single-rotor unmanned helicopter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105398572A true CN105398572A (en) | 2016-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510872083.8A Pending CN105398572A (en) | 2015-12-03 | 2015-12-03 | Speed-variable transmission mechanism of small single-rotor unmanned helicopter |
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| CN (1) | CN105398572A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105346712A (en) * | 2015-12-03 | 2016-02-24 | 衡阳云雁航空科技有限公司 | Small-sized single-rotor unmanned helicopter speed change system |
-
2015
- 2015-12-03 CN CN201510872083.8A patent/CN105398572A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105346712A (en) * | 2015-12-03 | 2016-02-24 | 衡阳云雁航空科技有限公司 | Small-sized single-rotor unmanned helicopter speed change system |
| CN105346712B (en) * | 2015-12-03 | 2023-12-15 | 江苏神铸智能科技有限公司 | Speed changing system of small single-rotor unmanned helicopter |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160316 |
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| WD01 | Invention patent application deemed withdrawn after publication |