Regulation structure of chain saw chain

Abstract

The invention relates to an adjustment structure of a chain saw chain, comprising a sprocket seat (1), a cover plate (2), a sprocket wheel (3), a guide plate (4), a chain (10), an adjustment knob (5), a tooth Condition (6), adjusting gear (7); the guide plate (4) has a transverse through groove (41) in the middle of the inner end, and an upwardly protruding bolt (8) is fixed on the sprocket seat (1). (8) Pass through the through groove (41) and can move laterally relative to the through groove (41); the tooth condition (6) is fixed on the inner end surface of the guide plate (4); the adjustment knob (5) is limited on the cover plate (2) And can rotate relative to the cover plate (2), the adjustment gear (7) is fixed on the bottom of the adjustment knob (5), and the bolt (8) passes through the adjustment gear (7) and the adjustment knob (5) successively and connects with a compressible adjustment The locking knob (9) of the knob (5) is threaded. It is a chain saw chain adjustment structure with convenient loading and unloading, high safety and long adjustment stroke.

Description

technical field [0001] The invention relates to the technical field of chainsaws, in particular to an adjustment structure for a chainsaw chain. Background technique [0002] A chainsaw is a gardening tool that uses a chain with blades to drive the chain to rotate at high speed through power to cut wood or branches. Because the chain in the chain saw will inevitably wear out during use, the chain will become loose on the guide plate, resulting in the chain saw not working properly, so the tension of the chain needs to be adjusted frequently. [0003] At present, there are two ways to adjust the chain tension: one is to adjust with a special wrench, which is relatively primitive, and the adjustment is very inconvenient; the other is to adjust by adjusting the structure. There are many adjustment structures for adjusting the chain tension of chainsaws. It generally adjusts the relative position of the guide plate and the chain through the eccentric wheel structure to adjust t...

AI Technical Summary

Problems solved by technology

[0005] There are certain defects in this adjusting device with eccentric wheel structure: first, the eccentric wheel structure is used to drive the relative movement between the guide plate and the chain, and a large force is required to rotate the hand wheel to realize tensioning of the chain during operation; secondly, due to the limitation of the shape of the guide plate, The eccentric wheel cannot be made very large, so the relative displacement between the guide plate and the chain is small, and the tension of the chain can only be adjusted within a small range; finally, the self-locking structure in the above-mentioned tensioning device is relatively complicated and easily damaged

[0008] 1. Since the runner, pinion, rack ring, and guide plate are connected in series on a hollow rivet from top to bottom, the bolt passes through the hollow rivet and is threaded with the handwheel, and the bolt is fixed on the shell. The hollow rivet The hole of the hollow rivet is slightly larger than the diameter of the screw, so when assembling, the hole of the hollow rivet can only be aligned with the bolt within a small range of the guide plate, and the direction of the approximate rivet and the bolt is perpendicular to each other. It is very inconvenient to assemble

[0009] 2. When assembling, the chain must be kept in a certain slack state before the rear end of the chain can be set on the transmission wheel. After the guide plate and other components are assembled, the guide plate must be adjusted to move forward. When adjusting, turn the runner, and the runner will drive The rotation of the pinion drives the rack and the guide plate to move forward through the cooperation of the rack and pinion, and the chain is tensioned so that the chain saw can work normally. Shorter adjustment stroke becomes shorter

[0010] 3. Because the runner must be turned before use, and the runner is very close to the chain, and the chain has blades, the hand is easy to touch the blade when turning, so the assembly is not safe

[0011] 4. The tensioning device of the above-mentioned chain saw involves many parts and has a complex structure

[0012] 5. Since the chain will become blunt every five hours or so during physical cutting, it is necessary to remove the chain frequently and sharpen it with a special tool before reinstalling it for use. It is necessary to remove the sprocket cover plate, locking handwheel and tension adjustment wheel first, and then turn the wheel to move the guide plate back laterally to loosen the chain before removing the chain, so it is very inconvenient to disassemble

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