CN2692359Y

CN2692359Y - Single cylinder internal combustion engine dynamic balancing mechanism

Info

Publication number: CN2692359Y
Application number: CN 200320127265
Authority: CN
Inventors: 丁履忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-07
Filing date: 2003-12-07
Publication date: 2005-04-13
Anticipated expiration: 2013-12-07

Abstract

The utility model belongs to the technical flied of internal combustion engines, in particular to a single cylinder internal combustion engine dynamic balancing mechanism which can balance the first-stage reciprocating inertia force and the second-stage reciprocating inertia force in the single cylinder internal combustion engine. The utility model comprises a balancing block, two eccentric wheels(or cranks), two connecting rods of the balancing block, pins of the balancing block and a sleeve of the balancing block. The two eccentric wheels are symmetrically arranged on a crankshaft at the two sides of the crankshaft center axis line of the single cylinder internal combustion engine, the paraxial ends of the eccentric wheels and the crank are arranged in the same-side direction, the abaxial ends of the eccentric wheels and the crank are arranged in the in the opposite directions, the eccentric wheels and the crank are a whole body, the shaft holes on the large heads of the connecting rods of the balancing block are sheathed on the eccentric wheels, the balancing block is arranged in the sleeve of the balancing block which is concentric with the cylinder jacket of the single cylinder internal combustion engine, the balancing block and the small heads of the connecting rods of the balancing block are connected together by the pins of the balancing block, and wherein, the ratio of the eccentricity of the crank and the distance between the large and small heads of the connecting rods is equal to the ratio of the eccentricity of the balancing block and the distance between the large and small heads of the connecting rods.

Description

The single-cylinder engine dynamic balancer

Technical field

The utility model belongs to technical field of internal combustion engines, the one-level reciprocal inertia force in particularly a kind of energy equilibrium single cylinder internal-combustion engine and the single-cylinder engine dynamic balancer of secondary reciprocal inertia force.

Background technique

Existing counterbalance effect single-cylinder engine dynamic balancer preferably is to adopt double-shaft balance mechanism.When single-cylinder engine is worked, the one-level reciprocal inertia force of existing double-shaft balance mechanism in can only the equilibrium single cylinder internal-combustion engine, and the secondary reciprocal inertia force in can not the equilibrium single cylinder internal-combustion engine, so the vibration that present single-cylinder engine is produced when work still can not get effective control, has influenced the performance index of single-cylinder engine.

Summary of the invention

The utility model is at the deficiency of the secondary reciprocal inertia force of the existing double-shaft balance mechanism that is adopted in single-cylinder engine in can not the equilibrium single cylinder internal-combustion engine, provide a kind of one-level reciprocal inertia force in can the equilibrium single cylinder internal-combustion engine, the single-cylinder engine dynamic balancer of the secondary reciprocal inertia force in again can the equilibrium single cylinder internal-combustion engine.

The technical solution adopted in the utility model is finished in the following way: a kind of single-cylinder engine dynamic balancer, it comprises equilibrium block, two eccentric wheels (or crank), two equilibrium block connecting rods, equilibrium block pin and equilibrium block covers.Two eccentric wheel symmetries are located on the bent axle of both sides, bent axle medial axis of single-cylinder engine, eccentric proximal ends and crank are in same side direction, eccentric axle head far away and crank are in opposite direction, between eccentric wheel and the bent axle integral body, have the axis hole that matches with eccentric wheel on the major part of equilibrium block connecting rod, shaft hole sleeve on the equilibrium block connnecting rod big end is on eccentric wheel, equilibrium block be contained in the concentric equilibrium block of single-cylinder engine cylinder sleeve cover in, link together by the equilibrium block pin between the microcephaly of equilibrium block and equilibrium block connecting rod, wherein, the throw of eccentric AO and the connecting rod of crank are big, equal equilibrium block throw of eccentric BO apart from the ratio of AC between the microcephaly and the equilibrium block connecting rod is big, between the microcephaly apart from the ratio of BD, be AO/AC=BO/BD, ∠ OAC=∠ OBD then, AC is parallel to BD.The balance one-level of the utility model single-cylinder engine dynamic balancer and the principle of secondary reciprocal inertia force are: referring to accompanying drawing 3, crankshaft rotating drives the eccentric wheel rotation, it is reciprocating that the eccentric wheel rotation drives equilibrium block by the equilibrium block connecting rod, because of ∠ AOC=∠ BOD, so ∠ ACO=∠ BDO, as long as therefore make AO * E=BO * F, make the moment (mass of balance block F * equilibrium block throw of eccentric BO) of equilibrium block equal the product of single cylinder engine piston mass E (comprising a connecting rod small end and a connecting rod part) and throw of eccentric (AO), one of single-cylinder engine, the secondary reciprocal inertia force can obtain balance.

The utility model is compared with the existing double-shaft balance mechanism that is adopted in single-cylinder engine, and it is remarkable to have a counterbalance effect, but both one-level reciprocal inertia forces in the equilibrium single cylinder internal-combustion engine, but the characteristics of the secondary reciprocal inertia force in the equilibrium single cylinder internal-combustion engine again.The utility model is particularly suitable as the dynamic balancer of all kinds of single-cylinder engines.

Description of drawings

Fig. 1 is the structural representation of single-cylinder engine dynamic balancer.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the working principle sketch of single-cylinder engine dynamic balancer.

Embodiment

Contrast accompanying drawing below, the utility model is described in further detail by embodiment.

With reference to accompanying drawing 1 and accompanying drawing 2, a kind of single-cylinder engine dynamic balancer, it comprises equilibrium block 3, two eccentric wheels 6 (or crank), two equilibrium block connecting rods 7, equilibrium block pin 8 and equilibrium block cover 9, two eccentric wheel 6 symmetries are located on the bent axle 2 of both sides, bent axle medial axis of single-cylinder engine, the proximal ends of eccentric wheel 6 and crank 5 are in same side direction, the axle head far away and the crank 5 of eccentric wheel 6 are in opposite direction, be an integral body between eccentric wheel 6 and the bent axle 2, have the axis hole that matches with eccentric wheel 6 on the major part of equilibrium block connecting rod 7, shaft hole sleeve on equilibrium block connecting rod 7 major parts is on eccentric wheel 6, equilibrium block 3 be contained in the concentric equilibrium block of single-cylinder engine cylinder sleeve cover 9 in, link together by equilibrium block pin 8 between the microcephaly of equilibrium block 3 and equilibrium block connecting rod 7, wherein, the throw of eccentric AO and the connecting rod of crank are big, equal equilibrium block throw of eccentric BO apart from the ratio of AC between the microcephaly and the equilibrium block connecting rod is big, between the microcephaly apart from the ratio of BD, be AO/AC=BO/BD, ∠ OAC=∠ OBD then, AC is parallel to BD.

In the accompanying drawing 1 is piston; 4 is connecting rod.

Claims

1, a kind of single-cylinder engine dynamic balancer, it is characterized in that this single-cylinder engine dynamic balancer comprises equilibrium block, two eccentric wheels or crank, two equilibrium block connecting rods, equilibrium block pin and equilibrium block cover, two eccentric wheel symmetries are located on the bent axle of both sides, bent axle medial axis of single-cylinder engine, eccentric proximal ends and crank are in same side direction, eccentric axle head far away and crank are in opposite direction, between eccentric wheel and the bent axle integral body, have the axis hole that matches with eccentric wheel on the major part of equilibrium block connecting rod, shaft hole sleeve on the equilibrium block connnecting rod big end is on eccentric wheel, equilibrium block be contained in the concentric equilibrium block of single-cylinder engine cylinder sleeve cover in, link together by the equilibrium block pin between the microcephaly of equilibrium block and equilibrium block connecting rod, wherein, the throw of eccentric of crank and connecting rod are big, the ratio of distance equals the equilibrium block throw of eccentric and the equilibrium block connecting rod is big between the microcephaly, the ratio of distance between the microcephaly.