CN206760078U - A kind of Novel disc hay mover cutter device - Google Patents

Abstract

The utility model relates to a novel disc mower cutting device, which comprises a cutter head, a mowing blade, a bolt and a cotter pin. A mowing blade is connected to the cutter head at intervals of 120° along its circumference, and the length of the outer edge of each mowing blade protruding from the peripheral surface of the cutter head is 55mm; the mowing blade and the cutter head are movably connected by bolts through the opening at the end of the blade ;The mowing blade will bounce back when encountering an obstacle, so as to avoid collision and fracture; The blade angle is 40°. In the utility model, the wings on both sides of the mowing blade are designed as blades. After one side of the blade is worn or scrapped, it is not necessary to replace the blades. As long as the lawnmower rotates in the opposite direction, the mowing can be continued, and mowing on both sides can be realized; When there are hard objects such as stones and branches, the mowing blade can be bounced in the opposite direction, avoiding collision, breaking or flying out to hurt people, and improving the use efficiency of the blade.

Description

A New Disc Mower Cutting Device

(1) Technical field

The utility model relates to a cutting device for a disc mower, which belongs to the field of agricultural and forestry machinery processing.

(2) Background technology

A lawn mower is a machine used to cut grass or trim garden plants, and the cutting device is one of its important parts. The rotary lawn mower is a type of unsupported cutting. The blades are installed on the rotary cutter head. Under the action of centrifugal force, they rotate together with the cutter head to cut grass. The forward speed is high, the productivity is high, and it is not easy to cause clogging. It is easy to replace the blade and easy to maintain. . There are roughly two types of disc cutting devices on the market for this lawn mower: one is that the blade is fixed to the cutter head, and it is easy to bend or break when encountering hard objects such as stones and branches, and then it is directly scrapped, which increases the use. The cost of the operator, and the broken blade may bounce off, causing certain damage to the human body; the second is a knife-flapping cutting device, the blade rotates under the action of centrifugal force, and can rebound when encountering obstacles, but at high speed It is easy to loosen in the case of rotation, and there is also a certain degree of danger. The connection between the blade and the cutter head is generally hinged. This method can prevent the blade from vibrating violently when it rotates. However, since the upper and lower surfaces of the blade are in contact with the surface of the cutter head, the friction force is increased and the blade is reduced. service life.

(3) Contents of the invention

In order to overcome the defects of the above-mentioned flail-type cutting device, the utility model provides a novel disc mower cutting device, which connects the cutter head of the present invention to the motor shaft of the existing lawn mower, and the motor shaft drives the cutter head High-speed rotation; the mowing blade is thrown out to work by centrifugal force.

A novel disc mower cutting device includes a cutter head, mowing blades, bolts and cotter pins.

The cutterhead is disc-shaped; the cutterhead is connected to the motor shaft and rotated by the motor shaft; the cutterhead is evenly connected with mowing blades along its circumference, and the outer edge of each mowing blade protrudes from the peripheral surface of the cutterhead The length of the mowing blade is 55mm; the mowing blade tail is provided with a blade tail opening; the mowing blade and the cutter head can be flexibly connected through the blade tail opening using bolts, and a 2mm gap is provided between the mowing blade and the cutter head; There is a washer between the grass blade and the cutter head; the mowing blade can rotate with the rotation of the cutter head; the blade will bounce back when encountering an obstacle to avoid collision and breakage; the top of the bolt has a hole for inserting a cotter pin to fix it nuts. The mowing blade is rectangular, and the two side wings of the mowing blade are blades, and the two side wings are symmetrically distributed, and the force is balanced during cutting; the blade angle of the blade is 40°.

Preferably, a mowing blade is connected to the cutter head at intervals of 120° along its circumference.

In the present invention, the wings on both sides of the mowing knife are distributed axially symmetrically along its axis, which can ensure the balance of force during cutting; the edge angle of the blade is 40°, and a large upward airflow will be generated during the rotation of the blade, so that the blade can be cut The grass stems are easy to leave the surface of the blade to avoid the accumulation of grass clippings; the two wings of the mowing blade are designed as blades, and there is no need to replace the blade after one side of the blade is worn or scrapped, as long as the mower rotates in the opposite direction, the grass can continue to be mowed , can realize mowing on both sides; there is a gap between the mowing blade and the cutter head, when encountering hard objects such as stones and branches in the grass, the mowing blade can bounce back in the opposite direction to avoid collision, breakage or flying Injure people and improve the efficiency of blade use.

(4) Description of drawings

Figure 1: Structural diagram of the cutting device of the utility model disc mower.

Fig. 2: The connection structure diagram of the cutter head and the mowing blade of the utility model.

Figure 3: Structural diagram of the mowing blade of the utility model.

In the figure: 1 shaft hole in the center of the cutter head, 2 cutter head, 3 mowing blade, 4 spring washer, 5 hole on the edge of the cutter head, 6 hole on the top of the bolt, 7 cotter pin, 8 bolts, 31 blade angle, 32 blade Tail hole, 33 blades on both sides.

(5) Specific implementation methods

Now in conjunction with the accompanying drawings, the utility model is further described, as shown in Figure 2, including the central shaft hole 1 of the cutter head, the cutter head 2, the mowing blade 3, the spring washer 4, the edge opening 5 of the cutter head, and the top opening of the bolt 6, cotter pin 7. The cutter head 2 is connected with the motor shaft through the shaft hole 1, and the mowing blade 3 is connected with the cutter head 2. The blade is driven by the centrifugal force generated by the high-speed rotation of the cutter head, and rotates with the cutter head to start weeding.

Three mowing blades 3 are evenly arranged along its circumference on a cutterhead 2, and each mowing blade is spaced at 120°, and the length of the mowing blade 3 heads protruding from the edge of the cutterhead is 55mm, and when the cutterhead 2 rotates at a high speed, The mowing blade 3 is thrown out to work, and the area swept by the mowing blade 3 meets the mowing requirements, and can maximize the mowing efficiency and reduce heavy mowing and missing mowing.

The diameter of cutterhead edge opening 5 is 16.2mm, and bolt 8 diameter is 16mm, is provided with spring washer between mowing blade 3 and cutterhead 2, and leaves 2mm gap between the two; Make mowing blade 3 be installed on Cutter head 2 can rotate freely after being put on, and when running into hard objects such as stones, branches in the bushes, mowing blade 3 can bounce back in reverse, avoids collision fracture and flies out and injures people.

After the mowing blade 3 and the cutter head 2 are connected with the bolt 8 and the spring washer 4, insert the cotter pin 7 into the hole 6 at the top of the bolt to prevent the nut from being loosened by the high-speed rotation of the mower blade and then detached from the bolt during work. Flying out; the blade does not directly contact the surface of the cutter head, and the frictional resistance between the two is smaller than that of the current cutting device, which improves the service life of the mowing blade.

In Fig. 3, the blade angle 31 is 40°, which is greater than the 35° angle commonly used by the cutting knife at present. During the rotation of the mowing blade 3, a large upward airflow will be generated, so that the cut grass stems are easy to leave the grass. The surface of the blade 3 avoids the accumulation of grass clippings; the diameter of the hole 32 at the tail of the blade is 16.2mm, and a bolt 8 is inserted in the hole 32 at the tail of the blade to connect the mowing blade 3 with the cutter head 2 . The whole mowing blade 3 is a regular rectangle, and the wings 33 on both sides of the blade are axisymmetrically distributed, and the force is balanced when cutting, so as to maintain a stable state.

Claims (6)

1. a kind of Novel disc hay mover cutter device, it is characterised in that including cutterhead, mowing blade, bolt and split pin；

The cutterhead is disc；Cutterhead is connected with machine shaft, is driven and rotated by machine shaft；Along its circumference on the cutterhead Uniformly it is connected with mowing blade；The mowing blade afterbody is provided with blade afterbody perforate；Mowing blade is led to cutterhead using bolt The movable connection of blade afterbody perforate is crossed, and packing ring is provided between mowing blade and cutterhead；Mowing blade can with cutterhead rotate and Rotation, blade, which runs into barrier, reversely to be flicked, collision free fracture；The bolt top drilling, consolidates for insertion opening pin Determine nut；The mowing blade is rectangle, and two flanks of the mowing blade are blade.

A kind of 2. Novel disc hay mover cutter device as claimed in claim 1, it is characterised in that the mowing blade outer rim The length for stretching out cutterhead circumferential surface is 55mm.

3. a kind of Novel disc hay mover cutter device as claimed in claim 1, it is characterised in that justify on the cutterhead along it Weekly interval 120 ° of connections, one mowing blade.

A kind of 4. Novel disc hay mover cutter device as claimed in claim 1, it is characterised in that described mowing blade and 2mm gaps are provided between cutterhead.

5. a kind of Novel disc hay mover cutter device as claimed in claim 1, it is characterised in that the basil of the blade is 40°。

A kind of 6. Novel disc hay mover cutter device as claimed in claim 1, it is characterised in that the mowing blade both sides The wing is axisymmetricly distributed, stress equalization during cutting.