CN113678622B - Can prevent grass to get into brush cutter of aircraft nose - Google Patents

Abstract

The invention discloses a brush cutter capable of preventing grass from entering a machine head, which comprises a supporting rod, a machine head unit, a control unit and a grass blocking structure, wherein the machine head unit is arranged at one end of the supporting rod, the control unit is arranged on the supporting rod and used for controlling the machine head unit, and the grass blocking structure is arranged on the machine head unit and used for preventing or reducing grass scraps from entering the interior of the machine head unit. According to the grass-blocking structure, under the actual grass-cutting condition of the brush cutter, the grass chips in the head unit are much less than those without the structure in a specific period.

Description

Can prevent grass to get into brush cutter of aircraft nose

Technical Field

The invention relates to a brush cutter, in particular to a brush cutter capable of preventing grass from entering a machine head.

Background

A brush cutter for cutting weeds, turf and other grass, comprises a main body, wherein the middle and rear end positions of a support rod are held by two hands, and weeds and turf on the ground are trimmed while moving left and right along the ground by rotating a cutter. The front end of the supporting rod is provided with a cutter unit, a cutter bearing part and a power transmission structure, and the rear end of the supporting rod is provided with a control unit and a hand holding part. The brush cutter on the market has the following defects: when the front end cutter is used for cutting weeds or plants with rattan shins, the weeds can enter the rotating part of the machine shell along the machine shell and the rotating cutter disc bearing seat or the baffle plate when the front end cutter moves left and right on the front end supporting rod. In long-term work, weeds are subjected to more and more rotating spaces. The loss of power transmission is increased, so that the heat productivity of a power output part of the machine is increased, the resistance of a transmission part is increased, the cutting capability is reduced, and the working time is shortened. Therefore, the use experience is poor and anxiety is generated from the actual use experience and the use experience.

Disclosure of Invention

The invention aims to provide a brush cutter capable of preventing grass from entering a machine head, which can prevent or reduce grass scraps from entering a machine head unit and ensure long-time normal work.

The invention adopts the following technical scheme for realizing the aim of the invention:

the invention provides a brush cutter capable of preventing grass from entering a machine head, which comprises:

a support rod;

a head unit provided at one end of the support rod;

the control unit is arranged on the supporting rod and used for controlling the handpiece unit;

and the grass blocking structure is arranged on the handpiece unit and used for preventing or reducing grass scraps from entering the interior of the handpiece unit.

Further, the head unit includes:

a housing;

rotating the cutter;

and the driving mechanism is accommodated in the shell and is used for driving the rotary cutter to move.

Further, the grass blocking structure comprises:

a baffle plate disposed between the rotary cutter and the housing;

and the step surface is spiral in shape and is formed on the end surface of the shell matched with the baffle.

Further, the step surface is provided with two spiral line curved surfaces which are formed alternately, and the spiral line curved surfaces are changed from high to low from inside to outside along the radial direction.

Further, a minimum gap between the housing and the baffle is no greater than 3mm.

Further, the drive mechanism includes:

a drive motor;

and the output shaft of the driving motor is connected with the rotary cutter through the transmission mechanism.

Further, the transmission mechanism includes:

the first gear is fixedly sleeved on the output shaft of the driving motor;

one end of the transmission shaft is rotatably arranged in the shell, the other end of the transmission shaft extends out of the shell and is fixedly connected with the rotary cutter, and the baffle is fixedly sleeved on a shaft body of the transmission shaft positioned outside the shell;

the second gear is fixedly sleeved on the shaft body of the transmission shaft in the shell, and the second gear is meshed with the first gear.

Further, the head unit further includes:

and the bearing is arranged in the shell and is sleeved on the peripheral side of the transmission shaft.

Further, the brush cutter capable of preventing grass from entering the head of the grass trimmer comprises:

and the handle holding unit is arranged at one end, far away from the handpiece unit, of the supporting rod, and the control unit is arranged in the handle holding unit.

Further, the control unit has a control circuit for controlling the drive motor.

The invention has the following beneficial effects:

according to the grass-blocking structure, under the actual grass-cutting condition of the brush cutter, the grass chips in the head unit are much less than those without the structure in a specific period.

Drawings

FIG. 1 is a schematic structural view of a brush cutter capable of preventing grass from entering a machine head according to an embodiment of the present invention;

FIG. 2 is a partially exploded view showing a first brush cutter capable of preventing grass from entering a machine head according to an embodiment of the present invention;

FIG. 3 is a schematic view, partly in section, of a brush cutter according to an embodiment of the present invention, for preventing grass from entering the head of the brush cutter;

FIG. 4 is a second partially exploded view of a brush cutter according to an embodiment of the present invention, which can prevent grass from entering the head;

fig. 5 is a partial cross-sectional view illustrating a head unit of a brush cutter capable of preventing grass from entering the head according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

A brush cutter capable of preventing grass from entering a head as shown in fig. 1 to 5 comprises a support pole 10, a head unit 20, a control unit 30, a grass blocking structure 40 and a handle grip unit 50, wherein the support pole 10 presents a rod-shaped body having a front end portion and a rear end portion, the head unit 20 presents a front end portion of the support pole 10, the handle grip unit 50 is provided at a rear end portion of the support pole 10 for an operator to hold when using the brush cutter, the control unit 30 is provided in the handle grip unit 50, and the control unit has a control circuit for controlling a driving motor 231.

Alternatively, the grass blocking structure 40 includes a baffle plate 41, the baffle plate 41 is disposed between the rotary cutter 22 and the housing 21, and a spiral step surface 42 is formed on an end surface of the housing 21, which is matched with the baffle plate 41, so that the rotary cutter 22 rotates once, and the step surface is changed alternately twice, that is, when the spiral step surface 42 rotates clockwise, a distance between a certain point of the baffle plate 41, which corresponds to the end surface of the housing 21, and the spiral surface of the housing 21 is increased from small to large, and then decreased from large to small.

Specifically, on the implementation of preventing or reducing grass clippings from entering the interior of the housing 21, two alternate spiral curved surfaces are formed on the step surface 42, in the axial direction, the spiral curved surfaces are changed from high to low, in the radial direction, the spiral curved surfaces are also changed from high to low, that is, the distance H1 from the point inside the spiral curved surfaces in the radial direction to a certain reference point of the housing 21 is greater than the distance H2 from the point outside the spiral curved surfaces to a certain reference point of the housing 21, so that the grass clippings are extruded outwards continuously in the working rotation of the baffle 41, the resistance is greater inwards, the grass clippings hardly enter the housing 21 under the action of centrifugal force in the continuous rotation of the rotary cutter 22, and the minimum gap between the housing 21 and the baffle 41 is preferably not greater than 3mm through actual measurement.

Alternatively, the handpiece unit 20 includes a housing 21, a rotary cutter 22 accommodated in the housing 21 for trimming, and a driving mechanism 23 accommodated in the housing 21 for driving the rotary cutter 22 to move, specifically, the driving mechanism 23 includes a driving motor 231 and a transmission mechanism 232, an output shaft of the driving motor 231 is connected to the rotary cutter 22 through the transmission mechanism 232, the transmission mechanism 232 includes a first gear 232A, a transmission shaft 232B and a second gear 232C, the first gear 232A is fixedly sleeved on the output shaft of the driving motor 231, one end of the transmission shaft 232B is rotatably disposed in the housing 21, the other end of the transmission shaft 232B extends out of the housing 21 and is fixedly connected to the rotary cutter 22, and the baffle 41 is fixedly sleeved on a shaft body of the transmission shaft 232B located out of the housing 21.

As an extension scheme, in order to make the rotation process of the transmission shaft 232B smoother and more stable, a bearing 24 is installed in the housing 21, and the bearing 24 is sleeved on the outer peripheral side of the transmission shaft 232B.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (7)

1. The utility model provides a can prevent grass to get into brush cutter of aircraft nose which characterized in that:

the brush cutter capable of preventing grass from entering the head of the grass trimmer comprises:

a support rod;

a head unit provided at one end of the support rod;

the control unit is arranged on the supporting rod and used for controlling the handpiece unit;

the grass blocking structure is arranged on the handpiece unit and used for preventing or reducing grass scraps from entering the interior of the handpiece unit;

the handpiece unit includes:

a housing;

rotating the cutter;

the driving mechanism is accommodated in the shell and used for driving the rotary cutter to move;

the grass blocking structure comprises:

a baffle plate disposed between the rotary cutter and the housing;

the step surface is spiral in shape and is formed on the end surface of the shell matched with the baffle;

the step surface is provided with two spiral line curved surfaces which are alternately formed, and the spiral line curved surfaces are changed from high to low from inside to outside along the radial direction.

2. A brush cutter as claimed in claim 1, wherein the minimum clearance between the housing and the baffle is no more than 3mm.

3. A brush cutter as claimed in claim 1, wherein said drive mechanism comprises:

a drive motor;

and the output shaft of the driving motor is connected with the rotary cutter through the transmission mechanism.

4. A brush cutter as claimed in claim 3, wherein said transmission mechanism comprises:

the first gear is fixedly sleeved on the output shaft of the driving motor;

one end of the transmission shaft is rotatably arranged in the shell, the other end of the transmission shaft extends out of the shell and is fixedly connected with the rotary cutter, and the baffle is fixedly sleeved on a shaft body of the transmission shaft positioned outside the shell;

the second gear is fixedly sleeved on the shaft body of the transmission shaft in the shell, and the second gear is meshed with the first gear.

5. A brush cutter as claimed in claim 4, wherein the head unit further comprises:

and the bearing is arranged in the shell and is sleeved on the peripheral side of the transmission shaft.

6. A brush cutter as claimed in claim 5, wherein said brush cutter is adapted to prevent grass from entering the head of the mower, comprising;

and the handle holding unit is arranged at one end, far away from the handpiece unit, of the supporting rod, and the control unit is arranged in the handle holding unit.

7. A brush cutter as claimed in claim 3, wherein the control unit has a control circuit for controlling the drive motor.

Images