WO2002076824A1

WO2002076824A1 - Transmission device for two propellers or rotors with combined rotating and reciprocating movements

Info

Publication number: WO2002076824A1
Application number: PCT/HR2001/000013
Authority: WO
Inventors: Branko Grahovac
Original assignee: Branko Grahovac
Priority date: 2001-03-23
Filing date: 2001-03-23
Publication date: 2002-10-03

Abstract

The invention refers to a transmission device for driving two propellers or rotors (32,33) in a reciprocating and rotating movement. The rotating movement of first shaft (3) is transmitted through a lower pair of bevel gears (3.1,6) to a second shaft (7), driving two chains (10,11). Both chains drive the rotation of a third shaft (12), which transmits the rotating movement through another pair of bevel gears (14,15.2) to an output shaft (15) driving both propellers or rotors. Two chain pins (10.1, 11.1) each one connected to one of the driving chains and sliding within horizontal slots (19.1, 24.1) on respective sleeves (19,24) generate the reciprocating movement of the propellers or rotors. Thrust is achieved through an increase in the angle of pitch of the propellers (33) which have reached the lower position while simultaneously the angle of pitch with the propellers (32) that have reached the upper position is decreased.

Description

TRANSMISSION DEVICE FOR TWO PROPELLERS OR ROTORS WITH COMBINED ROTATING AND RECIPROCATING MOVEMENTS

Classification of the invention

The invention falls under the category of aircraft's, especially helicopters; i.e. devices for transmission of reduction gear drive onto propellers or rotors.

According to the International Classification of Patents the object of the invention has been classified with a symbol B 64 L 35/02 which defines the transmission of power from the driving system onto propellers or rotors, i.e. the arrangement of transmission elements characteristic of a certain type of the driving system.

Technical problem

Mechanical problem addressed by this invention consists in the following: what design of the device for power transmission should be used from the driving system onto the two rows of propellers or rotors that are mutually vertically movable, in order to decrease the force of reaction. The technical problem is solved by the proposed device for helicopter drive power transmission from the driving system onto the two vertical rows of propellers or rotors that continuously draw near or away from each other.

State of die Art

All previous helicopter designs for the cargo lifting and moving through the air require a lot of power for lifting and maintaining of cargo in the air, as well as for overcoming the reaction force of the whole mass created as a result of thrust caused by the action of propellers due to a large numbers of revolutions and propeller inclination. This is a major disadvantage of the above known solution. According to this application the objective of the solution is to design such a device that will ensure the transmission of power. The objective of the Invention solution is to design a device which will ensure helicopter drive power transmission onto the two rows of propellers or rotors that continuously draw near or away from one another, which owing to the gravitational force being converted into circular motion ensures considerably smaller power consumption needed for maintenance in the air and transport of cargo through the air. Essence of the Invention

The device consists of a vertical casing in which two parallel horizontal axles are slotted and interconnected on tlie outer surface of tlie casing via chain transmission. Bolts fasten the casing onto the main board in which a driving axle is slotted for initial start - up witli gear that mesh witli the lower horizontal axle in the casing. On tlie upper horizontal axle in tlie casing there is a bevel wheel that meshes with the other bevel λvheel of a vertical axle that is slotted into the casing, which witli its grooves meshes with tlie hub grooves of another vertical axle slotted into a smaller slot link. This vertical axle also has grooves on the outer surface meshing witli the hub grooves of the third vertical axle slotted in the outer slot link. The referred vertical axles perform circular motion and operate as telescope tubes fitted one into the other having the same number of revolutions. In tlie vertical axle that is connected to the smaller slot link there is a horizontal opening in which one row of propellers is slotted, wliile the other row of propellers is slotted into tlie horizontal opening of the vertical axle of the larger slot link. Into the horizontal opening on the side of the larger slot links sits a chain link pin of one chain transmission, wliile the chain link pin of another chain transmission sits into Hie horizontal opening of the smaller slot link.

Via reduction gear tlie driving system revolves the driving axle witli tlie bevel wheel which meshes with the bevel wheel of the lower horizontal axle of the casing which it revolves and via two chain transmissions revolves the other horizontal axle of tlie casing, and this one revolves the vertical axle via the bevel wheel transmission. The vertical axle revolves the vertical axle witli propellers witli which it meshes, and this one the other vertical axle with propellers with which it meshes. The propellers of tlie upper and lower row of vertical axles revolve together witli them. Simultaneously, through chain transmissions motion, tlie chain link pins are the slot link witli tlie lower row of propellers upward, and lowering tlie slot link with the upper row of propellers that pass one another and reach their final points. After an equal departure of one row of propellers from tlie other, they draw near each other and this is continuously repeated. The angle of inclination of the propellers in the lower position increases, while simultaneously the angle of inclination of the propellers in the upper position, decreases whereby the thrust function is achieved, i.e. reduced power consumption due to tlie gravitational force. That would be the main advantage of the invention. The advantage of the invention is the simplicity of design.

Brief description of tlie drawing

The Invention is shown on tlie example of the manner operation as shown in tlie attached drawing where: figure 1 shows tlie drawing of the Invention figure 2 shows the cutaway view A - A of the Invention figure 3 shows the view "E" figure 4 shows tlie cutaway view B - B figure 5 shows tlie cutaway view C - C figure 6 shows tlie cutaway view D - D Detailed Disclosure of the Invention

The device for helicopter drive transmission power from tlie driving system with two vertical rows of propellers or rotors that continuously draw near or away from each other is characterised by tlie main board 1 witli the casing 1.1 in which 3 tlie axle is slotted with a 3.1 gear. The main board 1 with bolts 2 is fastened onto tlie reduction gear of the drive motor. The casing 4 is fastened to tlie main board 1 witli tlie bolts 5. In the bearings 4.1 and 4.2 of the casing 4 the 7 axle is slotted witli the chain wheel 7.2 and the gear wheel 6 that meshes with die gear wheel 3.1.on the axle 7 there is a chain wheel fastened with a nut 9. The chain wheel 8 with the chain 10 on wliich there is a chain link pin 10.1 meshes with the gear wheel 20 positioned on tlie axle 12, and is fastened with the nut 13. On the axle 12 there is the gear wheel 12.1 witli tlie chain link pin 11.1 that meshes with tlie chain wheel 7.1. The axle 12 sits into tlie bearings 4.3 and 4.4 of tlie casing 4. On the axle 12 there is the gear wheel 14 that meshes with the gear wheel 15.3 of die axle 15 which has grooves 15.1. The axle 15 sits into an axial bearing 4.5 of tlie casing 4, and is secured against slipping out from die opening 4.5 witli tlie dividing holder 17 fastened with bolts 18 to tlie casing 4. The axle 15 with its grooves 15.1 sits into the hub grooves 23.1 of the axle 23 wliich sits into the opening 19.3 of the slot link 19 and into tlie axial bearings 30 and 31 in the holder 21 fastened witli bolts 22 to tlie slot link 19. The slot link 19. The slot link 19 has an opening 19.1 on one side mto which the chain link pin 11.1 of the chain wheel 11 sits, wliile on tlie other side it has an opening 19.2 through wliich the chain link pin passes 10.1 which sits in the slot 24.1 of tlie slot link 24. The grooves 15.1 of tlie axle 15 mesh λvith the hub grooves 23.1 of the axle 23 which on the external surface has tlie grooves 23.2 wliich mesh witli the hub grooves 29.1 of die axle 29. In the upper part axle 23 has a transverse opening 23.3 into which tlie lower row of propellers sits 33. The axle 29 sits into the two axial bearings 27 and 28 positioned in the holder 25 fastened with bolts 26 to the slot link 24 and to tlie bearing 24.2 of the slot link 24. The axle 29 in tlie upper part has a longitudinal opening 29.3 into which the upper row of propellers sits 32. On each side of the axle 29 there is the longitudinal opening 29.2. The lower row of propellers 33 passes through opening 29.2 of the axle 29 and sits into die opening 23.3 within the axle 23, while tlie upper row of propellers 32 sits into the opening 29.3 of tlie axle 29. The axles 15, 23 and 29 perform circular motion and operate as telescope tubes placed one into tlie other so that they revolve witli. the same number of revolutions and have the possibility of axial shift.

The device operates in the following manner: The initial driving system via reduction gear and clutch turns tlie axle 3 with die gear wheel 3.1 wliich turns tlie axle 7 via tlie gear wheel 6. The axle 7 simultaneously revolves tlie gear wheels 7.1 and 8, and these via chains 11 and 10 tlie chain wheels 12.1 and 20 i.e. the axle 12 ύiatvia gear wheels 14 and 15.2 starts to revolve the axle 15, and tlie axle 15 with the grooves 15.1 wliich mesh widi the hub grooves 23.2 of the axle 23 with the propellers 33. Simultaneously tlie axle 23 witli tlie grooves 23.1 wliich mesh with tlie hub grooves 29.1 of tlie axle 29 turns tlie axle 29 witli the propellers 32. The chain wheel 7.1 pulls tlie chain 11 with die chain link pin 11.1 upwards lifting tlie slot link 19, and diis one lifting tlie axle 23 which in the axial shift goes deeper into tlie axle 29 moving die upper row of propellers 33 along the opening 29.2 toward die upper row of propellers 32 and passing over them, and both revolve with die same number of revolutions. At the same time die chain 10 with the chain link pin 10.1 turns die slot link 24 downward, and the slot link turns the axle 29 making tlie upper row of propellers 32 move downward and pass below them until die final lower point. What occurs thereafter is an equal departure of the propellers 32 from tlie propellers 33, and their drawing to each other which is continuously repeated. The thrust function is achieved through an increase in the angle of inclination of die propellers wliich have reached die lower position wliile at die same time there comes to a decrease in die angle of inclination with die propellers tiiat have reached the upper position so tiiat without die air resistance they can slide into the lower point where again they would assume the role of die cargo carrier. The Invention makes it possible for an engine of smaller power to start d e activity of the device's operation and tiiat of tlie turning of die driving propellers. Instantiy, at die very first appearance of die thrust, the gravitational force steps in to help the turn of die propellers to gain die increased angle of inchnation and to take over the thrust, which is continuously repeated.

Application of tlie hivention

The Invention can be applied to all new design of all helicopter types.

Claims

1. Helicopter drive power transmission device from tlie driving system onto die two vertical rows of propellers or rotors that continuously draw near or away from each otiier is characterised in tiiat axles (3) witli a gear wheel (3.1) sit mto a bearing (1.1) of the main board (1) fastened witli bolts (5) a casing is fastened (4) into whose bearings (4.1) and (4.2) sits die axle (7) witii the chain wheel (7.1), tiie gear wheel (6), the chain wheel (8) and a nut (9), wliile in die bearings (4.3) and (4.4) the axle sits (12) with die chain wheel (12.1), the gear wheel (14), the chain wheel (20) and a nut (13) where into tlie bearing (4.5) of the casing (4) and an axial bearing (16) tlie axle sits (15) with the grooves (15.1) and die gear wheel (15.2) secured witii a two part ring (17) fastened witli the bolts (18) where die axle (15) with die grooves (15.1) sits into tiie hub groove (23.1) of tlie axle (23) witli an opening (23.3) into which propellers sit (33), where tlie axle (23) witli the grooves (23.1) meshes with tiie hub grooves (29.1) of the axle (29), and sits mto the axial bearings (30) and (31) in the holder (21) wliich is fastened with the bolts (22) and into tiie bearing (19.3) of a slot link (19) into whose slot (19.1) a chain link pin sits (11.1) of the chain (11) that connects tiie chain wheels (7.1) and (12.1), while tlie chain link pin (10.1) of the chain (10) which connects tlie chain wheels (8) and (20) passes tiirough the opening (19.2) of tlie slot link (19) and sits into tlie opening (24.1) of the slot link (24) onto which the bolts (26) tlie holder (25) is fastened with axial bearings (27) and (28) into wliich as well as into die bearing (24.2) tiie axle sits (29) with tiie hub grooves (29.1), openings (29.2) and tlie opening (29.3) into which propellers sit (32).

2. In accordance with the claim 1., the device is characterised in that the upper row of propellers (32) and die lower row of propellers (33) continuously move axially from one to tiie other final position passing each otiier in the middle of tlie shift when tlie angle of inclination of tiie propeller is changed when final positions are reached.