End face tooth engaged and separated structure for speed reducer of mowing machine

Abstract

The invention relates to an end face tooth engaged and separated structure for a speed reducer of a mowing machine. The engaged and separated structure comprises a worm wheel, a power input worm rod externally engaged with the worm wheel, a power output shaft arranged in the worm wheel and a pull and control operation component arranged at one side of the worm rod; one end face of the worm wheel is internally provided with an end face tooth and a shaft sliding sleeve sleeved outside the power output shaft; one end face of the shaft sliding sleeve is externally provided with an end face tooth correspondingly engaged with the end face tooth arranged in one end face of the worm wheel; the other end face of the shaft sliding sleeve is provided with a locating pin tightly fixed with the power output shaft; a compression spring is arranged between the inner wall of the end face tooth of the shaft sliding sleeve and the locating pin; and the outer peripheral wall of the shaft sliding sleeve is provided with a shift fork which enables the shaft sliding sleeve to axially slide. In the engaged and separated structure, bevel friction is replaced by end face gear engaging force, so that the dynamics and the speed of jointing or separation are improved to make operation convenient and control flexible and prevent the damage of bevel friction; the service life of the end face tooth engaged structure is doubled compared with that of a friction cone structure; and the climbing speed and the mowing efficiency are obviously improved under the same condition.

Description

technical field [0001] The invention relates to a running mechanism of a lawn mower, in particular to a running mechanism for a lawn mower with a speed reducer clutch output power. Background technique [0002] Lawn mowers used in places such as urban green belts generally use worm gear reducers to achieve the purpose of small size, light weight, and durability, especially the use of worm gear reducers to output drive travel mechanisms has been widely used. The drive reduction box for grass machine, because the linkage device of the worm gear reducer is fixed on the power output shaft of the running mechanism in the circumferential direction by the friction cone, the engagement and separation are realized by the axial friction force, and the friction force depends on the curved dial. The rod exerts pressure on the friction cone to achieve it, so it usually needs to maintain enough maintaining force to work effectively. The operator is very laborious and difficult to master. ...

AI Technical Summary

Problems solved by technology

[0002] Lawn mowers used in places such as urban green belts generally use worm gear reducers to achieve the purpose of small size, light weight, and durability, especially the use of worm gear reducers to output drive travel mechanisms has been widely used. The drive reduction box for grass machine, because the linkage device of the worm gear reducer is fixed on the power output shaft of the running mechanism in the circumferential direction by the friction cone, the engagement and separation are realized by the axial friction force, and the friction force depends on the curved dial. The rod exerts pressure on the friction cone to achieve it, so it usually needs to maintain enough maintaining force to work effectively. The operator is very laborious and difficult to master. The operating force is too light to work, and the operating force is too heavy. Too heavy will cause the cone surface to wear, and the cone surface will slide and fail. The friction loss caused by the large enough friction will also seriously affect the service life. Tighten the friction force to the maximum and it will not work effectively, resulting in slippage and unable to go uphill, or even fall back and cause an accident

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