Lubrication structure of connecting rod large-head roller pin for dune buggy engine

Abstract

The invention discloses a lubrication structure of a connecting rod large-head roller pin for a dune buggy engine. A right crankcase provided with a first inclined oil hole is buckled and fixed with a left crankcase, a second bearing is pressed in a bearing hole on the right crankcase and supports a right crank on which an axial oil channel, a radical oil channel and an inclined oil channel are arranged, a boss is integrally formed on the right end of the right crankcase, and an inner hole of the boss is concentric with the bearing hole on the right crankcase; and the inner end of the first inclined oil hole penetrates into the inner hole of the boss and communicated with the radical oil channel on the right crank. The lubrication structure meets the requirement on lubrication of the connecting rod large-head roller pin for the engine, air cylinder holes, a piston and piston ring moving pairs, and when improving the lubrication reliability of the connecting rod large-head roller pin and preventing the oil shortage, the lubrication structure reduces the processing and assembling difficulty of parts, reduces the cost of the engine and is especially suitable for batch production.

Description

technical field [0001] The invention belongs to the technical field of beach car engines, and in particular relates to a lubricating structure for big-end needle rollers of connecting rods of beach car engines. Background technique [0002] like figure 2 As shown, the left crankcase 1 and the right crankcase 2 of the single-cylinder ATV engine are connected and fixed by positioning pins and bolts, and bearing holes are provided on the left and right crankcases 1 and 2, wherein the bearing on the left crankcase 1 The first bearing 3 is press-fitted in the hole, and the first bearing 3 is supported with the left crankshaft 5; Described left and right crankshaft 5,6 are connected with the large end of connecting rod 8 by crank pin 7, and needle roller 9 is housed between the large end of this connecting rod 8 and crank pin 7. In order to lubricate the big end of the connecting rod and the cylinder bore, piston, and piston ring kinematic pair, an oil passage hole 7a is opened ...

AI Technical Summary

Problems solved by technology

Since the processing and assembly precision of the matching hole of the small side cover are very high, it is easy to cause the matching hole of the small side cover to be out of concentricity with the bearing hole on the right crankcase, resulting in ablation and rotation of the bushing hole of the small side cover, causing the The originally connected oil hole is blocked, causing the engine connecting rod big head needle roller to be ablated due to lack of oil

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