CN2181171Y - Lawn mower blades that bounce back - Google Patents

Abstract

The utility model provides a modified mower cutter. It is composed of a cutter head, a cutting knife and a driving pin. The cutter is connected to the circumference of the cutter head via a transmission pin, the cutter head is arranged on the transmission shaft of the mower, and when the cutter head rotates, the cutter is opened under the action of centrifugal force to mow. When the mowing machine touches hard objects, the cutting knife can be bounced in the opposite direction, so that the injury caused by impact force can be reduced, and the vibration caused by the impact can also be reduced. Meanwhile, the cutting radius can be automatically reduced due to the rebound retraction of the cutting knife, so that the cutting dead angle of mowing can be reduced.

Description

The utility model relates to an improved lawnmower cutter, in particular to a lawnmower cutter which can rebound in reverse.

Existing mower blade has two types, and a kind of is disc-shaped blade, and another kind is wing-shaped blade. The disc blade is disc-shaped, and its circumference is surrounded by serrated cutting blades. On the whole, it is similar to the woodworking circular saw used by woodworking, only the angle design of the blade part is different, and the size of the tooth shape is different. ; The wing-shaped blade is plate-shaped, and a blade is set in the cutting direction. For the above two knives, the blade part for cutting weeds and the knife body part for connecting the device are integrally designed. When mowing, if the blade part touches hard objects in the grass, such as stones, branches, etc., hold The handle of the lawn mower will feel a brief continuous vibration, and the blade will be damaged; if it encounters small stones or branches, the small stones and branches will be hit and fly, which may hurt people; For slightly larger stones in the soil, the blade rotating at high speed will have a great impact. At this time, the following situations may occur: 1. The blade hits the stone at high speed, and the blade part may be broken by the huge impact force. It is extremely dangerous for the blade to fly out; 2. If the blade part is not broken, the high-speed collision will generate a huge rebound vibration, which will cause the entire lawn mower to vibrate, and the engine of the lawn mower may be turned off due to the instantaneous collision, hindering the operation of the lawn mower. use.

The task of the utility model is to provide an improved lawn mower cutter with high safety, good operation stability and reduced dead angle of mowing.

The utility model's task is achieved in that the cutter of the cutter is connected to the cutter head by the drive pin, the cutter can swing around the drive pin, and the blade of the cutter is towards the front of the cutter head rotation direction.

In the utility model, since the cutter is installed on the cutter head through the transmission pin, the cutter can swing around the transmission pin. Therefore, when the cutter head rotates, the cutter is opened by centrifugal force for weeding. If it touches a hard object in the grass, Such as stones, branches, etc., the cutting knife swings around the transmission pin and bounces back to reduce the instantaneous impact force, thereby avoiding the cutting knife directly hitting and breaking, and eliminating the danger of the cutting knife breaking the missile. At the same time, because the cutter has the function of rebounding, it will not cause the lawn mower engine to stop suddenly due to the instantaneous impact barrier. The rebound shrinkage characteristic of the utility model can make the cutting knife continuously reduce the cutting radius when the cutting knife rotates along with the gradually shrinking wall edge, so that it can go deep into the dead corner to carry out the mowing work.

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

Fig. 1 is the concrete structure axonometric assembly of the present utility model.

Fig. 2 is a front sectional view of the structure in Fig. 1 .

FIG. 3 is a schematic diagram of the operation of the structure in FIG. 1 .

Fig. 4 is a schematic diagram of the action of the structure in Fig. 1 before and after approaching the edge of the wall.

Referring to Figures 1 and 2, the utility model is composed of a cutterhead 1 and a plurality of cutting knives 2, the cutterhead 1 is a disc body, installed and fixed on the transmission shaft 3 of the mower, and the cutting knives 2 are connected by a transmission pin 4 On the circumference of the cutter head 1, the cutting knives 2 are evenly distributed on the circumference of the cutter head 1, and the cutting knives 2 and the transmission pin 4 are slidingly matched, that is, the cutting knife 2 can swing around the transmission pin 4, and the blade part of the cutting knife 2 is Towards the front of the rotation direction of the cutter head 1 to realize the mowing function of the cutter 2.

Referring to Fig. 3, the cutter head 1 is installed on the drive shaft 3 of the mower. When the cutter head 1 is driven to rotate by the drive shaft 3, the cutter 2 is opened under the centrifugal force to realize the weeding action. According to the mechanical analysis, due to The strength of the grass itself is not high, and the cutter 2 can easily cut the grass by relying on the centrifugal force and the tangential force in the direction of rotation, and because the cutter 2 rotates continuously, and there are multiple ones, it can quickly cut the grass continuously, achieving The purpose of weeding. In case there are hard objects in the grass, such as stones, branches, etc., once the cutting knife 2 in the bounce hits these hard objects, the cutting knife 2 is subject to a reaction force and bounces in the opposite direction. impact force, and reduce the impact vibration generated by the instantaneous impact, so that the cutter 2 can bounce back when it hits, avoiding direct collision and breaking; secondly, because of avoiding direct impact, it can prevent the cutter head 1 This short stop will cause the lawn mower engine to stall, just as if the car suddenly steps on the brakes while moving, but does not step on the clutch, the car engine will stall.

Referring to Fig. 4, when it is necessary to cut the weeds located at the dead corner of the fence, the cutter 2 will constantly reduce the cutting radius of the cutter 2 when it rotates along with the tapering fence because of its characteristic of being able to rebound and shrink, thereby It can go deep into dead corners for weeding.

Claims (2)

1. A lawnmower cutter consisting of a cutterhead (1), a cutter (2) and a drive shaft (3), characterized in that the cutterhead (2) is connected to the cutterhead (1) through a drive pin (4) , the cutting knife (2) can swing around the transmission pin (4), and the blade portion of the cutting knife (2) is towards the front of the cutterhead (1) rotation direction. 2. The cutting tool according to claim 1, characterized in that a plurality of cutting knives (2) are evenly arranged on the circumference of the cutter head (1).

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