CN2181171Y

CN2181171Y - Mover's cutter

Info

Publication number: CN2181171Y
Application number: CN93226215U
Authority: CN
Inventors: 徐振东
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-08-20
Filing date: 1993-08-20
Publication date: 1994-11-02
Anticipated expiration: 2003-08-20

Abstract

The utility model provides an improved lawn mower cutter which is composed of a cutter head, a cutting knife and a drive pin, wherein, the cutting knife is connected to the periphery side of the cutter head through the drive pin. The cutter head is arranged on a drive shaft of the lawn mower. When the cutter head is rotated, the cutting knife is opened under the centrifugal action to mow grass. If a hard object is touched at the time of mowing, the cutting knife can be sprung to an opposite direction, the injury caused by the impact force can be reduced, and the vibration caused by the impact can also be reduced. Meanwhile, because the rebound and retraction of the cutting knife can automatically reduce the cutting radius, the cutting dead angle of grass mowing can be reduced.

Description

Mover's cutter

The utility model relates to a kind of improved mower cutter, the mower cutter that particularly a kind of cutter can oppositely flick.

Existing mower cutter has two kinds of patterns, and a kind of is disk shape blade, and another kind is a wing tip.Cylinder blade is discoid, and its circumferential edge zigzag cutter sword that has been periphery is similar to the employed carpenter's circular saw of carpenter as a complete unit, only is the angle design difference of knife edge part, and the varying in size of profile of tooth; Wing tip is an en plaque, establishes blade in its cut direction.Above-mentioned two kinds of cutters, the blade section of excision weeds with partly be global design in order to the cutter hub of coupling arrangement, when mowing, knife edge part is as if the hard thing of running in the meadow, as stone, branch etc., to hand the handle of mower and can feel a burst of of short duration continuous vibration, blade can be damaged; As run into small stone, twig, then small stone, twig can be hit and be flown upward, and might hurt sb.'s feelings; Sink to stone big slightly in the earth as unfortunately running into, blade in the high speed rotating will produce greatly and impact, following situation may take place in this moment: 1. blade high-speed impact stone, and knife edge part may be subjected to great impulsive force and rupture, and the blade fly bomb of fracture is gone out very big danger; 2. if knife edge part does not rupture, high velocity impact produces bounce-back vibration greatly, can make whole mower generation vibration, also may make the engine misses of mower because of the collision of moment, hinders and uses.

Task of the present utility model provides a kind of safe, and operational stability is good, the improved mower cutter at the dead angle that can reduce to mow.

Task of the present utility model is achieved in that the cutter of cutter is connected in cutterhead by trundle, and cutter can be swung around trundle, and the blade of cutter is the place ahead towards the cutterhead direction of rotation.

The utility model is because cutter is to be installed on the cutterhead through trundle, cutter can be swung around trundle, therefore when cutterhead rotates, utilize centrifugal force that cutter is opened and carry out weeding, as if the hard thing of running in the meadow, as stone, branch etc., cutter flicks backward around the trundle swing, reduce instantaneous impact, thereby avoid cutter directly to bump firmly and rupture, eliminated cutter fracture fly bomb and caused danger.Because cutter has the function of back bullet, can not cause that lawn mower engine braking suddenly is flame-out simultaneously because of instantaneous bump intercepts yet.Resilience shrinkage character of the present utility model, the cutting radius in the time of making cutter constantly reduce the cutter rotation along with the wall edge of convergent, thereby can go deep into the dead angle and carry out mowing work.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is that concrete structure axle of the present utility model is surveyed assembling fully.

Fig. 2 is the main cutaway view of Fig. 1 structure.

Fig. 3 is the action schematic diagram of Fig. 1 structure.

Fig. 4 is that Fig. 1 structure is near action schematic diagram before and after the wall edge.

With reference to Fig. 1,2, the utility model is made up of cutterhead 1 and a plurality of cutter 2, cutterhead 1 is a disc, be fixed on the power transmission shaft 3 of mower, cutter 2 is connected in by trundle 4 on the circumference of cutterhead 1, and cutter 2 is evenly distributed on the circumference of cutterhead 1, cutter 2 is to slide with trundle 4 and joins, be that cutter 2 can be around trundle 4 swings, the knife edge part of cutter 2 is towards the place ahead of cutterhead 1 direction of rotation, to realize cutter 2 mowing functions.

With reference to Fig. 3, cutterhead 1 is to be installed on the power transmission shaft 3 of mower, and when cutterhead 1 during by power transmission shaft 3 driven in rotation, cutter 2 opens under centrifugal action, realization weeding action, according to mechanical analysis, because careless intensity own is not high, cutter 2 relies on the tangential force of centrifugal force and rotation direction easily grass to be cut off, and because cutter 2 is rotation continuously, it has a plurality ofly again, thereby can apace grass be cut off continuously, reaches the purpose of weeding.Just in case hard thing is arranged in the chance meadow, as stone, branch etc., cutter 2 during bullet changes is these hard things at a touch, cutter 2 promptly is subjected to a reaction force, and flicks in the other direction, can reduce instantaneous impact this moment, with the vibration of the minimizing bump that temporary impact produced, like this, cutter 2 time can flick backward at bump, avoids direct collision and ruptures; Secondly, also owing to avoid direct bump, thereby can prevent temporary impact to produce the of short duration of cutterhead 1 to stop, thisly of short durationly stop to make lawn mower engine flame-out, just look like that automobile is stepped on brake suddenly in advancing, and do not have stepping on clutch, the situation that the car engine chance is stopped working is identical.

With reference to Fig. 4, when needs cuttings is positioned at the weeds at place, enclosure wall dead angle, cutter 2 will have the characteristic of can resilience shrinking because of it, and the cutting radius when constantly reducing cutter 2 rotations along with the enclosure wall of convergent is carried out weeding thereby go deep into the dead angle.

Claims

1, a kind of mower cutter of forming by cutterhead (1), cutter (2) and power transmission shaft (3), it is characterized in that cutter (2) is connected in cutterhead (1) by trundle (4), cutter (2) can be around trundle (4) swing, and the blade of cutter (2) is the place ahead towards cutterhead (1) direction of rotation.

2, cutter according to claim 1 is characterized in that cutter (2) is on a plurality of circumference that on average are disposed at cutterhead (1).