CN211210519U

CN211210519U - Brush cutter convenient to dismouting tool bit

Info

Publication number: CN211210519U
Application number: CN201921577646.0U
Authority: CN
Inventors: 黄苹苹
Original assignee: Henan Chuhe Garden Grass Service Co ltd
Current assignee: Henan Chuhe Garden Grass Service Co ltd
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-08-11
Anticipated expiration: 2029-09-20

Abstract

The utility model relates to a brush cutter convenient for disassembling and assembling a cutter head, which comprises a grass cutting head, wherein the grass cutting head comprises a cutter head and a cutter head, the cutter head comprises a cutting edge part and a cutter clamping part which is fixedly connected with the tail end of the cutting edge part and has a cross section size larger than that of the cutting edge part, more than 2 clamping holes are uniformly arranged on the peripheral surface of the cutter head, and the cutter head is arranged in the clamping holes; a clamping ring is arranged in the cutter head and is detachably connected with the inner sides of all the cutter clamping parts; the utility model discloses a brush cutter's tool bit dismouting of being convenient for has simplified mounting structure, and simple structure, compactness are reasonable, reduce part quantity, and blade on the quick convenient change grass mower has improved work efficiency.

Description

Brush cutter convenient to dismouting tool bit

Technical Field

The utility model belongs to the technical field of garden equipment, concretely relates to brush cutter convenient to dismouting tool bit.

Background

The brush cutter is a trimming mechanical device for gardens, and brings great convenience for people to trim gardens. The grass mowing device for the brush cutter has two types, one is a nylon rope head which is composed of a round box and a disc, wherein the round box is provided with a nylon rope, the disc drives the nylon rope to rotate rapidly during working, and grass is broken by the nylon rope in the rapid rotation process. The other is a metal blade with teeth, and when the grass cutting machine works, the blade is driven by an engine to rotate quickly to cut off grass. The current common grass mowing mode is that a metal blade, a saw blade and a nylon rope are matched for use. Hard shrub weeds are removed by a metal blade, and then soft grass or tender grass is beaten by a nylon rope. However, the nylon rope head is fast damaged in the friction of the grass mowing disc in the fast rotating process, the loss of hard grass is larger, the nylon rope head is only suitable for soft grass, and the working efficiency is not high. The metal blade is suitable for cutting shrubs or thick-stem weeds due to high strength, the speed is low when the metal blade is used for cutting soft weeds, the effect is not good, the metal blade is used and has certain dangerousness, when large stones are met, the damage degree of the blade is high, and the damaged fragments or impacted stones are easy to cause harm to human bodies. At present, plastic blades exist, and when the plastic blades are used for a long time and touch hard objects, the elasticity of the plastic blades is insufficient, so that the plastic blades can break; plastic blades wear relatively quickly in use due to insufficient wear resistance, requiring frequent replacement of the blade tip. But traditional cutting piece is mostly fixed mounting, and the dismouting is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough of prior art and providing a brush cutter convenient to carry out dismouting and change to the cutter.

The technical scheme of the utility model as follows:

a brush cutter convenient for dismounting a cutter head comprises a grass cutting head, wherein the grass cutting head comprises a cutter head and a cutter head, the cutter head comprises a cutting edge part and a cutter clamping part which is fixedly connected to the tail end of the cutting edge part, the size of the cross section of the cutter clamping part is larger than that of the cutting edge part, more than 2 clamping holes are uniformly formed in the circumferential surface of the cutter head, and the cutter head is installed in the clamping holes; a clamping ring is arranged in the cutter head and is detachably connected with the inner sides of all the cutter clamping parts.

Furthermore, the inner peripheral wall of the cutter head is provided with an accommodating groove matched with the cutter clamping part.

Further, the inner peripheral surface of the tool clamping portion is an arc surface.

Furthermore, the clamping ring is in threaded connection or insertion connection with the inner sides of all the tool clamping parts.

Furthermore, the annular downward protrusion is provided with a protruding ring on the cutter head, and the inner side of the snap ring is connected with the protruding ring.

Furthermore, the lower edge of the cutter head extends towards the inside of the cutter head to form a clamping support.

Further, the clamp support is provided with a clamping groove along the circumferential direction, and the clamping ring is provided with clamping teeth corresponding to the clamping groove.

Furthermore, the number of the clamping holes is 2-6, and the clamping holes are arranged in a central symmetry mode by taking the axis of the cutter head as the center.

Compared with the prior art, the beneficial effects of the utility model are that:

when the tool bit is replaced, the tool bit can be replaced in any number after the clamp ring is screwed off, after the replacement is completed, the cutting edge part of the tool bit penetrates out of the clamping hole, the cutting edge part abuts against the inner peripheral wall of the cutter head, and the clamp ring is screwed in to tightly press the cutting edge part against the inner peripheral wall of the cutter head, so that the fixation of the tool bit is realized; the utility model discloses a brush cutter's tool bit dismouting of being convenient for has simplified mounting structure, and simple structure, compactness are reasonable, reduce part quantity, and blade on the quick convenient change grass mower has improved work efficiency.

Drawings

Fig. 1 is a schematic perspective view of a grass mowing head according to an embodiment of the present invention.

Fig. 2 is a front sectional view of the grass mowing head according to embodiment 1 of the present invention.

Fig. 3 is a bottom cross-sectional view of the grass mowing head according to embodiment 1 of the present invention.

Fig. 4 is a front sectional view of the grass mowing head according to embodiment 2 of the present invention.

In the figure, a cutter head 1, a mounting hole 2, a knife edge part 3, a knife clamping part 4, a cutter head 5, a clamping hole 6, a clamping ring 7, a protruding ring 8, a clamping groove 9, a clamping tooth 10 and a clamping support 11.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 to 3, a brush cutter convenient for mounting and dismounting a cutter head comprises a grass cutting head, the grass cutting head comprises a cutter head 1 and a cutter head 5, the cutter head 5 comprises a knife edge part 3 and a knife clamping part 4 which is fixedly connected with the tail end of the knife edge part 3 and has a cross section size larger than that of the knife edge part 3, more than 2 clamping holes 6 are uniformly arranged on the circumferential surface of the cutter head 1, and the cutter head 5 is mounted in the clamping holes 6; a clamping ring 7 is arranged in the cutter head 1, and the clamping ring 7 is detachably connected with the inner sides of all the cutter clamping parts 4.

The center of the cutter head 1 is provided with a mounting hole 2, and the cutter head 1 and the cutter head 5 are mounted on a rotating mechanism of the brush cutter through the mounting hole 2.

As shown in fig. 1 to 3, the knife locking portion 4 includes a fixing block connected to the root of the knife edge portion 3 and a fixing piece connected to the inner side of the fixing block, after the knife head 5 is installed, the fixing block is just located in the locking hole 6, the fixing piece is attached to the inner side of the peripheral wall of the knife disc 1, and the size of the fixing piece is larger than that of the locking hole 6, so that the knife head 5 cannot be pulled out of the locking hole 6; preferably, the inner peripheral surfaces of all the holder portions 4 are formed in an arc surface or have a concave groove to facilitate engagement of the holder portions 4 with the snap ring 7.

Preferably, in order to facilitate the positioning of the tool engaging portion 4, an accommodating groove adapted to the tool engaging portion 4 is formed on the inner peripheral wall of the cutter head 1, and the tool engaging portion 4 is partially or completely accommodated in the accommodating groove.

Preferably, as shown in fig. 1 to 3, the snap ring 7 is directly engaged or inserted with the inner side of all the knife clamping portions 4 by screw threads; realize both's thread engagement through set up corresponding screw thread respectively on the periphery of snap ring 7 and the medial surface of sword card portion 4, similar, realize grafting between them through setting up slot and plug-in components that correspond along the axial respectively on the periphery of snap ring 7 and the medial surface of sword card portion 4.

As shown in fig. 1 to 3, the cross-sectional shape of the blade portion 3 corresponds to the cross-sectional shape of the chucking hole 6; preferably, the cross-sectional shape of the clamping hole is a figure with inconsistent upper and lower widths, such as a trapezoid; the mounting direction of the tool bit 5 is convenient to distinguish by the clamping hole 6, and the tool bit 5 is prevented from being reversely mounted.

As shown in fig. 2 to 3, preferably, the lower edge of the cutter head 1 extends into the cutter head 1 to form a clamping support 11, the clamping support 11 can support the bottom of the fixing piece, and the clamping support 11 and the upper surface of the cutter head 1 jointly limit the movement of the fixing piece when the clamp 7 is installed, so that the position of the fixing piece is favorably kept when the clamp ring 7 is installed, and the installation of the clamp ring 7 is facilitated.

As shown in fig. 3, optionally, a clamping groove 9 is circumferentially arranged on the clamping holder 11, a clamping tooth 10 is arranged on the clamping ring 7 corresponding to the clamping groove 9, and the clamping tooth 10 is matched with the clamping groove 9, so that the clamping tooth 10 can enter the cutter head 1 through the clamping groove 9; when the clamping ring 7 is installed, after the clamping ring 7 enters the cutter head 1, the clamping ring 7 is screwed to enable the clamping ring 7 and the clamping part 4 to be screwed tightly, and therefore the cutter head 5 is fixed.

The number of the clamping holes 6 is 2-6, and the clamping holes 6 are arranged in a centrosymmetric mode by taking the axis of the cutter head 1 as the center, and preferably, the number of the clamping holes 6 is 2-3.

Preferably, a plurality of through balance holes are formed in the cutter head 1, the balance holes are arranged in a centrosymmetric manner by taking the axis of the cutter head 1 as the center, and the balance holes are used for reducing the weight of the cutter head 1.

Example 2

This example is another embodiment based on example 1, and the description of the same technical solution as in example 1 will be omitted, and only the technical solution different from example 1 will be explained.

As shown in fig. 4, a protruding ring 8 is annularly and downwardly protruded on the cutter head 1, and the inner side of the snap ring 7 is connected with the protruding ring 8.

Preferably, the outer peripheral wall of the projecting ring 8 is provided with a thread, and the retainer ring 7 is threadedly engaged with the outer peripheral wall of the projecting ring 8 to fix the retainer ring 7, in which case the outer peripheral wall of the retainer ring 7 can abut against the fixing piece without the thread.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a brush cutter convenient to dismouting tool bit, includes the head of beating the grass, the head of beating the grass includes blade disc (1) and tool bit (5), its characterized in that: the cutter head (5) comprises a knife edge part (3) and a knife clamping part (4) which is fixedly connected to the tail end of the knife edge part (3) and has a cross section size larger than that of the knife edge part (3), more than 2 clamping holes (6) are uniformly formed in the circumferential surface of the cutter head (1), and the cutter head (5) is installed in the clamping holes (6); a clamping ring (7) is arranged in the cutter head (1), and the clamping ring (7) is detachably connected with the inner sides of all the cutter clamping parts (4).

2. The brush cutter convenient for dismounting and mounting the cutter head according to claim 1, characterized in that: the inner peripheral wall of the cutter head (1) is provided with an accommodating groove matched with the cutter clamping part (4).

3. The brush cutter convenient for dismounting and mounting the cutter head according to claim 1, characterized in that: the inner circumferential surface of the cutter clamping part (4) is an arc surface.

4. The brush cutter convenient for dismounting and mounting the cutter head according to claim 1, characterized in that: the clamping ring (7) is in threaded connection or insertion connection with the inner sides of all the knife clamping parts (4).

5. The brush cutter convenient for dismounting and mounting the cutter head according to claim 1, characterized in that: the cutter head (1) is provided with a protruding ring (8) in an annular downward protruding mode, and the inner side of the clamping ring (7) is connected with the protruding ring (8).

6. The brush cutter convenient for dismounting and mounting the cutter head according to claim 1, characterized in that: the lower edge of the cutter head (1) extends into the cutter head (1) to form a clamping support (11).

7. A brush cutter convenient for dismounting and mounting a cutter head according to claim 6, characterized in that: the clamp is characterized in that a clamping groove (9) is formed in the clamp support (11) along the circumferential direction, and clamping teeth (10) are arranged on the clamping ring (7) corresponding to the clamping groove (9).

8. The brush cutter convenient for dismounting and mounting the cutter head according to claim 1, characterized in that: the number of the clamping holes (6) is 2-6 and the clamping holes are arranged in a central symmetry mode by taking the axis of the cutter head (1) as the center.