阅读说明：本技术 一种割灌机工作头连接结构 (Brush cutter working head connecting structure ) 是由 杨宏军 于 2018-08-04 设计创作，主要内容包括：本发明公开的是一种割灌机工作头连接结构,该连接结构是由齿轮箱、输出轴、托块、刀片、压板、护罩和螺母等构成,其披露的技术特征是将压板和护罩设计为整体式结构,故在齿轮箱的输出轴上安装刀片后再安装整体式的压板和护罩就显得非常方便、灵活。同时,护罩还通过固定安装的轴承与压板之间形成相对转动,当工作头工作时,一旦护罩不小心碰到障碍物、就能通过相对转动以防止护罩磕碰破裂,故护罩也能采用重量更轻的塑料等轻质材料制成,极大方便了操作者的轻松使用,改进后的工作头还具有工作效率高、使用寿命长、拆装更换便捷、省力等优点。(The invention discloses a brush cutter working head connecting structure, which comprises a gear box, an output shaft, a supporting block, a blade, a pressing plate, a shield, a nut and the like. Meanwhile, the protective cover further forms relative rotation between the bearing fixedly installed and the pressing plate, when the working head works, once the protective cover is accidentally touched with an obstacle, the protective cover can be prevented from colliding and breaking through relative rotation, so the protective cover can also be made of light materials such as plastics with lighter weight, the light use of an operator is greatly facilitated, and the improved working head further has the advantages of high working efficiency, long service life, convenience in disassembly, assembly and replacement, labor saving and the like.)

1. A brush cutter working head connecting structure comprises a gear box (1), an output shaft (2) is arranged on the gear box, a supporting block (3), a blade (4), a pressing plate (8), a shield (5) and a nut (6) which are sequentially connected in series are arranged on the output shaft, the supporting block (3) is in transmission connection with the output shaft (2), and the brush cutter working head connecting structure is characterized in that the pressing plate (8) and the shield (5) are of an integral structure, the integral structure is that a connecting hole (10) for connecting the output shaft (2) is formed in the shield (5), and a bearing (9) which is fixedly installed is arranged in the connecting hole; and a connecting boss (11) extends from the pressure plate (8) and is tightly connected to the inner ring of the bearing (9).

2. The brush cutter working head connecting structure according to claim 1, characterized in that the two pressing plates (8) are designed and respectively installed on the upper and lower sides of the shield (5), a connecting boss (11) extends from each pressing plate (8), and the connecting bosses (11) on the two pressing plates (8) are respectively connected with the inner ring of the bearing (9) in a tight fit manner.

3. The brush cutter working head connecting structure according to claim 1, characterized in that the blade (4) is a hard blade.

4. The brush cutter working head connecting structure according to claim 1, characterized in that the transmission connecting structure between the supporting block (3) and the output shaft (2) is an internal and external spline connection structure.

5. The brush cutter working head connecting structure according to any one of claims 1 to 4, characterized in that the shield (5) is a lightweight plastic shield.

Technical Field

The invention relates to a working head connecting structure of landscaping machinery, in particular to a brush cutter working head connecting structure.

Background

The brush cutter is mainly applied to garden mechanical equipment for removing weeds in green belts on two sides of lawns, orchards, hillsides and roads, the working head of the brush cutter is also the most important working part of the brush cutter, and the service performance of the brush cutter is often influenced by the quality of the connection structure of the working head, so that the working efficiency and the service life of the brush cutter can be greatly improved by designing a better working head of the brush cutter. The current brush cutter working head is shown in figure 4, and mainly comprises a gear box 1, a support block 3, a blade 4, a pressing plate 8, a shield 5, a flange nut 6 and the like which are sequentially connected on an output shaft 2 of the gear box in series, wherein the support block 3 and the output shaft 2 are designed into a transmission connection structure, so that the output shaft rotates to drive the support block, the blade 4, the pressing plate 8, the shield 5 and the flange nut 6 tightly pressed on the support block 3 to synchronously rotate, and further, the rotation cutting motion of the blade is realized. In the working head connecting structure, the pressing plate and the protective cover are both separately installed. Therefore, after the blade is installed, it is very inconvenient to install the pressure plate and the protective cover, and if the traditional working head needs to be rotated to smoothly disassemble and assemble all the components, the traditional working head is troublesome and labor-consuming to disassemble and assemble. Meanwhile, the protective cover and the output shaft are pressed by the nut to synchronously rotate, once the protective cover is contacted with an obstacle, relative rotation cannot be formed, the protective cover made of light plastic is easy to collide and break, in order to solve the problems, the conventional manufacturer only can make the protective cover made of metal materials which are difficult to collide, the weight of the working head is greatly increased, and an operator is very laboured in use.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the brush cutter working head connecting structure which is convenient, flexible and labor-saving to disassemble, assemble and replace, has high working efficiency and long service life.

The technical problem of the invention is realized by the following technical scheme:

a brush cutter working head connecting structure comprises a gear box, wherein an output shaft is arranged on the gear box, a supporting block, a blade, a pressing plate, a protective cover and a nut are sequentially connected in series on the output shaft, the supporting block is in transmission connection with the output shaft, the pressing plate and the protective cover are of an integral structure, a connecting hole for connecting an output shaft is formed in the protective cover, and a bearing fixedly installed is arranged in the connecting hole; the pressure plate is extended with a connecting boss which is tightly connected with the inner ring of the bearing.

The two pressing plates are designed and respectively arranged at the upper side and the lower side of the shield, a connecting boss extends from each pressing plate, and the connecting bosses on the two pressing plates are respectively connected with the inner ring of the bearing in a tight fit manner.

The blade is a hard blade.

The transmission connecting structure between the supporting block and the output shaft is an inner spline connecting structure and an outer spline connecting structure.

The protective cover is a light plastic protective cover.

Compared with the prior art, the invention mainly designs the pressing plate and the protective cover in the connecting structure of the brush cutter working head into an integral structure, so that the installation of the integral pressing plate and the protective cover after the blade is installed on the output shaft of the gear box is very convenient and flexible. Meanwhile, the protective cover further forms relative rotation between the bearing fixedly installed and the pressing plate, when the working head works, once the protective cover is accidentally touched with an obstacle, the protective cover can be prevented from colliding and breaking through relative rotation, so the protective cover can also be made of light materials such as plastics with lighter weight, the light use of an operator is greatly facilitated, and the improved working head further has the advantages of high working efficiency, long service life, convenience in disassembly, assembly and replacement, labor saving and the like.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

FIG. 2 is a cross-sectional structural schematic view of a platen and shield of unitary construction.

Fig. 3 is an exploded perspective view of fig. 2.

Fig. 4 is a schematic view of a connecting structure of a working head of a conventional brush cutter.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the above drawings.

As shown in fig. 1-4, 1 is a gear box, 2 is an output shaft, 3 is a support block, 4 is a blade, 5 is a shield, 6 is a nut, 7 is an installation boss, 8 is a pressure plate, 9 is a bearing, 10 is a connecting hole, and 11 is a connecting boss.

A brush cutter working head connecting structure is mainly composed of a gear box 1, a supporting block 3, a blade 4, a pressing plate 8, a shield 5, a flange nut 6 and the like, as shown in figure 1.

The rear end of the gear box 1 is connected with an operating rod (not shown) of the brush cutter, a gear set is arranged in the gear box 1, the bottom of the gear box extends out of an output shaft 2, and the output shaft consists of an external thread shaft at the front end and an external spline shaft at the rear end; the supporting block 3, the blade 4, the pressing plate 8 and the protective cover 5 are sequentially arranged on the output shaft 2 in series from bottom to top and are connected to an external thread shaft of the output shaft 2 through a flange nut 6 in a threaded mode.

The supporting block 3 is of a disc-shaped structure, the center of the supporting block is provided with an inner spline hole, the inner spline hole is matched with an outer spline shaft on the output shaft 2 to form transmission connection, and the bottom surface of the supporting block 3 is provided with a circular concentric mounting boss 7; the blade 4 is a hard blade, the center of the blade is provided with a round hole matched with the mounting boss 7 on the bottom surface of the support block 3, and after the blade 4 is mounted on the support block 3, the plane of the blade is flush with the top surface of the mounting boss; the pressing plate 8 and the protective cover 5 are designed to be of an integral structure and are made of light plastics, so that the overall weight of the working head is reduced, an operator can use the working head easily, and the protective cover 5 is mainly used for protecting the blade 4 and preventing the blade from being damaged due to the fact that the blade touches hard objects such as stones.

The integral structure of the pressing plate 8 and the shield 5 is shown in fig. 2 and 3, and mainly the pressing plate 8 is arranged on the upper side and the lower side of the shield, and the circular and concentric connecting bosses 11 which extend oppositely are respectively arranged on the pressing plates arranged on the upper side and the lower side; the utility model discloses a protection cover 5, including the protection cover 5, the connection hole 10 that supplies output shaft 2 to connect in still be equipped with the bearing 9 of making fixed mounting with injection moulding's mode, simultaneously, the clamp plate 8 of the upper and lower both sides of protection cover 5 is tight-fitting connection through connecting boss 11 respectively on the inner circle of bearing 9, so make two clamp plates 8 form certain rotation relative to protection cover 5 through the bearing, such structural design probably prevents colliding with of protection cover 5 and breaks.

The working head connecting structure adopted by the invention has the advantages of lighter weight, convenient and flexible installation, firm and reliable connection, high working efficiency and longer service life. Meanwhile, the parts can be disassembled, assembled and replaced without rotating the working head, and the device is very convenient and labor-saving.