CN2525253Y - Gear train of gasoline engine - Google Patents

Abstract

The utility model discloses a gear train of gasoline engine which is used in the single cylinder gasoline engines with the cylinder bores of 85mm to 95 mm. The utility model comprises a crankshaft timing gear (1), an initiative starting gear (2), a driven starting gear (3), a camshaft timing gear (4), a balance shaft gear (5) and a crankshaft balance gear (6), wherein, the crankshaft timing gear (1) and the crankshaft balance gear (6) are arranged on a crankshaft; the initiative starting gear (2) is arranged on a starting shaft; the driven starting gear (3) and the camshaft timing gear (4) are arranged on a camshaft; the balance shaft gear (5) is arranged on a balance shaft; the crankshaft timing gear (1) and the camshaft timing gear (4) are meshed, the initiative starting gear (2) and the driven starting gear (3) are meshed, the crankshaft balance gear (6) and the balance shaft gear (5) are meshed; thereby, the utility model has the advantages of a compact structure, excellent technical succession, high universality of the parts, smooth operation, etc.

Description

Petrol engine gear train

One, technical field

The utility model is that a kind of cylinder diameter that is used for is a uniaxiality balance formula gear train on 85～95mm type single cylinder petrol engine.

Two, background technique

The single cylinder petrol engine of producing in China all is little cylinder diameter at present, cylinder diameter is generally below 85mm, and the single-cylinder engine of cylinder diameter more than 85mm mostly is diesel engine, because petrol engine has sufficient combustion, pollute for a short time, power is big, running steadily, start characteristics such as fast, extremely the user welcomes, and to have developed cylinder diameter be the single cylinder petrol engine of 90mm in my unit for this reason.

Three, summary of the invention

The purpose of this utility model be exactly for cylinder diameter for the single cylinder petrol engine of 85～95mm provide a kind of have compact structure, running steadily, the gear train of characteristics such as technology inheritance and component universality be strong.The utility model is made up of crankshaft timing gear, active starting gear, driven starting gear, camshaft timing gear, balance shaft gear, crankshaft counterbalance gear etc.Crankshaft timing gear is coaxial with the crankshaft counterbalance gear, is installed on the bent axle of single cylinder petrol engine, and initiatively starting gear is installed on the starting shaft, and driven starting gear is coaxial with camshaft timing gear, be installed on the camshaft, and balance shaft gear is installed on the trunnion shaft.Crankshaft timing gear and camshaft timing gear engagement, initiatively starting gear and driven starting gear engagement, crankshaft counterbalance gear and balance shaft gear engagement.The crankshaft timing gear that is installed on the bent axle drives camshaft timing gear, also drives the driven starting gear coaxial with camshaft timing gear simultaneously, and driven starting gear has driven initiatively starting gear again; Camshaft timing gear drives camshaft and rotates, and guarantees that valve motion meets valve timing; Rotate with the coaxial mounted crankshaft counterbalance gear driven of crankshaft timing gear balance shaft gear, balance shaft gear drives the vibration balancing that trunnion shaft is finished petrol engine.When hand starting, initiatively starting gear drives driven starting gear, and camshaft is rotated, and drives crankshaft timing gear by the camshaft timing gear that is installed on the camshaft again, and bent axle is rotated, and finishes starting.Wherein the train in some gear and the single cylinder diesel is similar, therefore the utlity model has compact structure, and the technology inheritance is good, component universality is strong, characteristics such as running balance.

Four, description of drawings

Accompanying drawing is the utility model schematic representation.

Five, specific embodiments as shown in drawings, this real hand is novel to be made up of crankshaft timing gear (1), active starting gear (2), passive starting gear (3), camshaft timing gear (4), balance shaft gear (5), crankshaft counterbalance gear (6) etc., crankshaft timing gear (1) is coaxial with crankshaft counterbalance gear (6), is installed on the bent axle of single cylinder petrol engine; Initiatively starting gear (2) is installed on the starting shaft; Driven starting gear (3) is coaxial with camshaft timing gear (4), be installed on the camshaft, and balance shaft gear (5) is installed on the trunnion shaft.Crankshaft timing gear (1) and camshaft timing gear (4) engagement, initiatively starting gear (2) meshes with driven starting gear (3), crankshaft counterbalance gear (6) and balance shaft gear (5) engagement.

Specifically being of a size of between each gear of the utility model:

Crankshaft timing gear (1) is 83～86mm with the horizontal equivalent A of camshaft timing gear (4),

Crankshaft timing gear (1) is 62～65mm with the perpendicular distance B of camshaft timing gear (4);

Balance shaft gear (5) and crankshaft counterbalance gear (6) on same vertical line,

Balance shaft gear (5) is 103～106mm with the perpendicular distance E of crankshaft counterbalance gear (6);

Driven starting gear (3) is 9～11mm with the horizontal equivalent C of active starting gear (2),

Driven starting gear (3) is 51～53mm.. with the perpendicular distance D of active starting gear (2)

When bent axle rotates, driving camshaft timing gear (4) by crankshaft timing gear (1) rotates, camshaft timing gear (4) drives camshaft work, guaranteeing the valve motion timing. camshaft timing gear (4) also drives driven starting gear (3) by camshaft simultaneously, and driven starting gear (3) drives initiatively starting gear (2) again.When bent axle drives crankshaft timing gear (1), also drive crankshaft counterbalance gear (6), crankshaft counterbalance gear (6) drives balance shaft gear (5), balance shaft gear (5) drives the vibration balancing that trunnion shaft is realized petrol engine. when petrol engine adopts hand starting, shake starting shaft, drive driven starting gear (3) by active starting gear (2), driven starting gear (3) drives bent axle by camshaft, camshaft timing gear (4), crankshaft timing gear (1), realizes the hand starting of petrol engine.

Because the utility model has designed six trains, and crankshaft timing gear (1) is coaxial with crankshaft counterbalance gear (6), crankshaft timing gear (4) is coaxial with driven starting gear (3), therefore, the utlity model has compact structure, characteristics such as the technology inheritance is good, and component universality is strong, and it is steady to turn round.

Claims (2)

1, a kind of cylinder diameter is the petrol engine gear train of the single cylinder petrol engine of 85～95mm, it is characterized in that it includes crankshaft timing gear (1), active starting gear (2), driven starting gear (3), camshaft timing gear (4), balance shaft gear (5), crankshaft counterbalance gear (6), crankshaft timing gear (1) is coaxial with crankshaft counterbalance gear (6), be installed on the bent axle of single cylinder petrol engine, initiatively starting gear (2) is installed on the starting shaft, driven starting gear (3) is coaxial with camshaft timing gear (4), be installed on the camshaft, balance shaft gear (5) is installed on the trunnion shaft, crankshaft timing gear (1) and camshaft timing gear (4) engagement, initiatively starting gear (2) and driven starting gear (3) engagement, crankshaft counterbalance gear (6) and balance shaft gear (5) engagement.

2, according to the said petrol engine gear of claim 1 train, it is characterized in that specifically being of a size of between each gear:

Crankshaft timing gear (1) is 83～86mm with the horizontal equivalent A of camshaft timing gear (4),

Crankshaft timing gear (1) is 62～65mm with the perpendicular distance B of camshaft timing gear (4),

Balance shaft gear (5) and crankshaft counterbalance gear (6) on same vertical line,

Balance shaft gear (5) is 103～106mm with the perpendicular distance E of crankshaft counterbalance gear (6),

Driven starting gear (3) is 9～11mm with the horizontal equivalent C of active starting gear (2),

Driven starting gear (3) is 51～53mm with the perpendicular distance D of active starting gear (2).

Images