CN110925087A

CN110925087A - Unmanned helicopter engine with parallel horizontal double cylinders and underneath balance shafts

Info

Publication number: CN110925087A
Application number: CN202010059455.6A
Authority: CN
Inventors: 陈超
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-01-19
Filing date: 2020-01-19
Publication date: 2020-03-27

Abstract

The invention discloses a parallel horizontal double-cylinder lower balance shaft unmanned helicopter engine, which comprises: the engine cooling system comprises a water tank, a water tank water supply pipe, a water tank sewer pipe, a cylinder, a water pump and the like, so that the heat of the engine can be dissipated, a crankshaft connecting rod piston of the engine and a cylinder cover gas distribution mechanism form a gas distribution and combustion mechanism of the engine, the gas distribution and combustion mechanism can be fully combusted, the engine can continuously output power by combustion, in addition, a balance shaft is arranged below a crankshaft of the engine, the balance shaft is driven by the power of the crankshaft to synchronously rotate with the crankshaft, so that the vibration of the engine can be greatly reduced.

Description

Unmanned helicopter engine with parallel horizontal double cylinders and underneath balance shafts

Technical Field

The invention relates to an engine of a parallel horizontal double-cylinder lower balance shaft unmanned helicopter, which is applied to the technical field of unmanned helicopters.

Background

Along with the development of modern science and technology, the unmanned helicopter is applied more and more, and the defects of the existing unmanned helicopter are found in practical application, the engine of the existing small-sized unmanned helicopter is mainly a horizontally-opposed two-stroke double-cylinder engine, the engine is simple in structure, no balancing device is arranged inside the engine, the vibration is large, and the engine is in a structure that two cylinders are horizontally opposed to each other on the left side and the right side of the engine, so that the width of the engine is large, the appearance of the unmanned helicopter manufactured by using the engine is large due to the limitation of the width of the engine, the flight resistance of the unmanned helicopter in forward flight is large, the unmanned helicopter is not fast in flight, the gravity center of the unmanned helicopter is moved outwards to two sides, the stability of the helicopter is poor, and the unmanned helicopter specially designed for small and medium-sized unmanned helicopters is manufactured, A center of gravity concentrated engine is necessary.

Disclosure of Invention

The invention aims to solve the technical problem of providing an unmanned helicopter engine which has a reasonable structure, small whole width, small vibration and concentrated gravity center for the engine aiming at the defects in the prior art, and adopts the following technical scheme for realizing the aim of the invention: the unmanned helicopter engine with parallel horizontal double cylinders and lower balance shaft includes two parallel cylinders arranged horizontally to make the engine have small width, small height and concentrated engine center, two pistons inside the two cylinders are connected to the shaft diameter of crankshaft connecting rod via two connecting rods and driven by rotating crankshaft to reciprocate, and the engine has relatively great vibration, so that the engine has one balance shaft below the crankshaft and one gear on the crankshaft to rotate, and the balance weight on the balance shaft is eccentrically rotated and the shaft diameter of the eccentric connecting rod on the crankshaft is counter-balanced to counteract the vibration produced during high speed operation of the engine, the chain has the advantages of high transmission precision, low noise and long service life, thereby constituting a reliable valve actuating mechanism of the engine.

Compared with the prior art, the invention has the following advantages:

1. the two cylinders of the engine are arranged in parallel and horizontally placed, so that the whole width of the engine is reduced, the height of the engine is correspondingly reduced, and the center of gravity of the engine is concentrated.

2. The engine is provided with the balance shaft device, so that the vibration of the engine during high-speed operation is obviously reduced, and the internal friction of the engine is also reduced due to the small vibration, thereby greatly prolonging the service life of the engine.

3. In conclusion, the unmanned helicopter has the advantages of reasonable structure, small width and height of the engine and compact design, when flying, the unmanned helicopter produced by the engine has small air resistance, high flying speed, centralized gravity center and good flying stability, and because the vibration of the engine is small, the abrasion of other accessories on the unmanned helicopter is correspondingly reduced, so that the service life of the unmanned helicopter is prolonged, and the like.

Drawings

Fig. 1 is a rear side view of the present invention.

Fig. 2 is a front side view of the present invention.

Fig. 3 is a rear view of the present invention.

Fig. 4 is a front view of the balance shaft of the present invention.

Description of the reference numerals

1-water tank 2-air filter 3-throttle valve 4-water tank sewer pipe 5-flywheel

6-crankshaft 7-piston 8-connecting rod 9-water tank water feeding pipe 10-balance shaft

11-crankshaft balance shaft gear 12-balance shaft gear 13-water pump 14-exhaust pipe 15-timing chain

16-valve 17-intake camshaft 18-exhaust camshaft

19-cylinder 21-balance shaft balancing weight 22-cylinder cover 23-timing chain wheel.

The specific implementation mode is as follows:

the following detailed description of the invention is provided in conjunction with the appended drawings:

as shown in fig. 1, 2, 3, and 4, the present invention includes: the cooling liquid in the water tank 1 flows to the water pump 13 through the water tank sewer pipe 4, flows into the cylinder 19 through the water pump, flows back to the water tank 1 through the water tank water supply pipe 9 through the cylinder cover 22, and then forms the cooling system of the engine. Two cylinders are arranged in parallel in the cylinder 19, two pistons 7 are connected on a connecting rod 8 in the cylinder, the other end of the connecting rod is arranged on the connecting rod shaft diameter of a crankshaft 6, when the crankshaft rotates, the connecting rod 8 and the pistons 7 are simultaneously driven to do reciprocating motion to form the reciprocating work cycle of the engine, the crankshaft 6 drives a flywheel 5 to rotate together when rotating, a crankshaft balance shaft gear 11 is arranged on the crankshaft 6, the crankshaft balance shaft gear 11 is used for driving a balance shaft gear 12 and simultaneously a balance shaft 10 to start rotating, two balance shaft counter weights 21 are arranged on the balance shaft 10 to rotate together, as the balance shaft counter weights 21 rotate eccentrically and the crankshaft 6 rotate synchronously, the eccentric force of the connecting rod shaft diameter and the eccentric force of the balance shaft counter weights are just mutually offset, the vibration of the engine is reduced, a timing chain wheel 23 is arranged at the other end of the crankshaft 6 to drive a timing chain 15, the other end of the timing chain 15 drives an intake camshaft 17 and an exhaust camshaft 18 simultaneously, the two camshafts are installed in a cylinder cover 22, a throttle valve 3 and an air filter 2 are further installed above the cylinder cover 22, an exhaust pipe 14 is installed below the cylinder cover 22, a valve 16 is further installed in the center of the cylinder cover 22, and opening and closing of the valve are achieved through driving of the intake camshaft 17 and the exhaust camshaft 18.

Claims

1. The utility model provides an unmanned helicopter engine of balanced axle is put to horizontal double-cylinder below paralleling which characterized in that includes: the engine is provided with two parallel cylinders, pistons are arranged in the two cylinders which are horizontally arranged, the pistons are driven by a crankshaft connecting rod to reciprocate, one end of a crankshaft is provided with a flywheel which is a device for storing the power of the engine, one side of the crankshaft close to the flywheel is provided with a crankshaft balance shaft gear for driving a balance shaft and the balance shaft gear to rotate, the balance shaft counter weight rotates together with the balance shaft, and the eccentric rotation of the balance shaft counter weight and the vibration generated by the eccentric rotation of a connecting rod joint of the crankshaft are counteracted mutually, so that the vibration of the engine is large The amplitude is reduced, a small timing chain wheel is arranged at the other end of the crankshaft and drives the chain to drive the air inlet cam shaft and the air outlet cam shaft to rotate, and the rotation of the two cam shafts drives the air valve in the cylinder cover to perform opening and closing movement, so that the air distribution work among the crankshaft, the connecting rod, the piston and the air valve is realized.

2. The unmanned helicopter engine with parallel horizontal double cylinders and underneath balance shafts of claim 1 is characterized in that: the engine has two parallel cylinders and is set horizontally.

3. The unmanned helicopter engine with parallel horizontal double cylinders and underneath balance shafts of claim 1 is characterized in that: a balance shaft is arranged below a crankshaft of the engine, and a gear on the crankshaft drives a gear on the balance shaft to synchronously rotate.

4. The unmanned helicopter engine with parallel horizontal double cylinders and underneath balance shafts of claim 1 is characterized in that: the valve actuating mechanism of the engine is realized by driving the valve actuating mechanism on a cylinder cover by a timing chain wheel and a timing chain on a crankshaft.