CN209120660U - The protection body of the rotating knife of brush cutter and brush cutter - Google Patents

Abstract

The utility model provides the protection body of the rotating knife of brush cutter and brush cutter.Offer can make the good brush cutter of trim edge after edge pruning.Brush cutter (10) includes: rotating knife (14), can rotatably be set to the front end of support rod (11)；And protection body (20), it is with front side protection department (23) and grounding parts (22), the front side protection department (23) is arc-shaped, the front side protection department (23) leans on the position of front side in the leading edge potion that the front end of support rod (11) is set to the rotating range (14a) than rotating knife (14), for protecting the front side of the rotating range (14a) of rotating knife (14), when so that the rotation axis of rotating knife (14) erects rotating knife (14) as horizontal mode, the grounding parts (22) are with the peripheral part of straight line and ground face contact.

Description

The protection body of the rotating knife of brush cutter and brush cutter

Technical field

The utility model relates to the protection bodies for the cut the grass on a lawn brush cutter of grass, grass etc. and the rotating knife of brush cutter, special It is not related to fitting through that erect rotating knife this so-called to cut off the grass for the boundary part for being grown in the structures such as building The protection body of the rotating knife of the brush cutter and brush cutter of edge pruning.

Background technique

Patent Document 1 discloses a kind of brush cutters for cut the grass on a lawn grass, grass etc..The brush cutter includes: motor Shell is set to the front end of support rod；Electric motor is set to the inside of motor shell；Rotating knife can rotatably be set In the downside of motor shell；Lid, is installed on the motor shell of the front end of support rod, for covering the rear side of rotating knife；With And protection body, than rotating knife rotating range leading edge potion forwards highlightedly set on support rod front end motor shell Body.Rotating knife for the brush cutter uses nylon wire, is suitble to trim thinner grass, turfgrass using the rotating knife of nylon wire Deng.It covers for preventing the turfgrass cut off using rotating knife, grass from dispersing to operating personnel side, lid is fan-shaped, after rotating knife Side cover rotating knife direction of rotation on the side locations from upstream side to downstream side side locations part.In addition, anti- Watch box is for preventing the leading edge of the rotating range of rotating knife from contacting with structures such as buildings, comprising: half-round, before being located at Edge, semicircular in shape；And interconnecting piece, it stretches out, is connect with motor shell, which is logical to rear side at the both ends of half-round It crosses made of being bent the metal wire rods such as metal wire.

In the case where the brush cutter, even if the rotation axis for making rotating knife is substantially vertical with ground, rotation of rotating knife Turn range and ground it is substantially parallel and using electric motor make rotating knife rotate in the state of, by operate support rod make rotating knife When being swung along ground level, cut off using rotating knife and cut the grass on a lawn grass, grass etc..It is trimmed using such brush cutter When being grown in this so-called edge prunings such as turfgrass, the grass of the boundary part of the structures such as building, by so that rotation The rotation axis of knife, which becomes horizontal mode, erects rotating knife, makes oblique front and the ground face contact of protection body, and makes rotation Rotating knife is moved along structures such as buildings, can wipe out be grown in the boundary part of the structures such as building turfgrass, Grass etc..

Existing technical literature

Patent document

Patent document 1: Japanese Unexamined Patent Publication 2013-034404 bulletin

Utility model content

Utility model will solve the problems, such as

In the case where the brush cutter documented by above patent document 1, it is as described above so that rotating knife rotary shaft Line becomes the oblique front that horizontal mode makes rotating knife erect when carrying out edge pruning, to make protection body up and down and ground face contact, And it trims and is grown in turfgrass, grass of boundary part of the structures such as building etc..Edge pruning is being carried out using the brush cutter When, due to the front semicircular in shape of protection body, there are such problems: oblique front and ground with the protection body of ground face contact Millet cake contact, it is difficult to make to move linearly with the protection body of ground face contact along the boundary part of the structures such as building, trim side The effect of edge is bad.The purpose of the utility model is to provide can make the good brush cutter of trim edge after edge pruning With the protection body of the rotating knife of brush cutter.

The solution to the problem

To solve the above-mentioned problems, the utility model provides a kind of brush cutter, which is characterized in that the brush cutter includes: rotation Rotor can rotatably be set to the front end of support rod；And protection body should with front side protection department and grounding parts Front side protection department is arc-shaped, which is set to the leading edge potion of the rotating range than rotating knife in the front end of support rod By the position of front side, the front side of the rotating range for protecting rotating knife, so that the rotation axis of rotating knife becomes horizontal When mode erects rotating knife, the grounding parts with straight line, straight line with it is arc-shaped or compare radius of curvature for the protection department of front side Biggish arc-shaped peripheral part and ground face contact.

In the brush cutter constituted as described above, if made to make the rotation axis of rotating knife become horizontal mode Rotating knife contacts in a manner of contacting the grounding parts of protection body along structure with ground by line in the state of erecting, and makes to prevent The grounding parts of watch box are moved along the rectilinear direction contacted with ground line, then can along structure boundary part linearly into Row edge pruning, the trim edge after capable of making edge pruning are good.

In the brush cutter constituted as described above, it is preferred that the brush cutter includes lid, and the lid is to cover rotating knife The mode of the rear side of rotating range is set to the front end of support rod, and lid is fan-shaped, in the rotation of the rear side covering rotating knife of rotating knife Turn side locations from upstream side on direction to downstream side side part, when being observed with the slave rear side of rotating knife Direction of rotation on the side in downstream side be downside and so that the rotation axis of rotating knife is become horizontal mode keeps rotating knife vertical When rising, grounding parts are equipped in lid and the discontiguous position in ground.It, can be with the side in the downstream side of lid and ground not when such The mode of contact makes grounding parts and ground face contact.In addition, in the brush cutter, it is preferred that protection body is to pass through bending metals Wire rod and formed.

In addition, to solve the above-mentioned problems, the utility model provides the protection body of the rotating knife of brush cutter, it is used to protect Rotating knife set on the front end of the support rod of brush cutter, comprising: front side protection department is arc-shaped, in the front end of support rod The leading edge potion that portion is set to the rotating range than rotating knife leans on the position of front side, the front side of the rotating range for protecting rotating knife； And grounding parts, with make rotating knife rotation axis become horizontal mode erect rotating knife when, the grounding parts with straight line, Straight line and it is arc-shaped or compared to the biggish arc-shaped peripheral part of radius of curvature for the protection department of front side and ground face contact.

If the protection body of the rotating knife of the brush cutter constituted like this to be installed on to the front end of support rod, so that rotation The rotation axis of rotor, which becomes horizontal mode, to be made to make the grounding parts of protection body along structure in the state of rotating knife standing It is contacted in a manner of being contacted with ground by line, and moves the grounding parts of protection body along the rectilinear direction contacted with ground line, then Edge pruning can be linearly carried out along the boundary part of structure, the trim edge after capable of making edge pruning is good.

Detailed description of the invention

Fig. 1 is the perspective view of the brush cutter of the utility model.

Fig. 2 is the top view of the front end of brush cutter.

Fig. 3 is skeleton diagram when carrying out edge pruning.

Fig. 4 is the enlarged drawing of the front end of brush cutter when carrying out edge pruning.

Description of symbols

10, brush cutter；11, support rod；14, rotating knife；15, it covers；20, protection body；22, grounding parts.

Specific embodiment

Hereinafter, being described with reference to the embodiment party of the protection body of the brush cutter of the utility model and the rotating knife of brush cutter Formula.As shown in Figure 1, brush cutter 10 includes: support rod 11, in the elongated cylindrical shape extended along anteroposterior direction；Motor list Member 12 is set to the front end of support rod 11；And control unit 30, it is set to the rear end of support rod 11.

As shown in Figure 1, motor unit 12 includes being fixed on the motor shell 13 of the front end of support rod 11 and set on motor Electric motor (illustration omitted) in shell 13.The rotary shaft (illustration omitted) rotated under the driving of electric motor is set as from horse It is prominent up to the downward side of shell 13.Rotating knife 14 is releasably installed on rotary shaft.The rotating knife 14 of present embodiment uses nylon Line cutter is made of winder and the linear nylon wire extended from winder.Edge when rotating knife 14 from upside from carrying out It is rotated clockwise.

As shown in Figure 1, be equipped with lid 15 for covering the rear side of rotating knife 14 in the front end of support rod 11, lid 15 by Motor shell 13 is installed on the front end of support rod 11.Lid 15 is used to prevent the turfgrass using the cutting of rotating knife 14, is careless to work Industry personnel are dispersed side.As shown in Fig. 2, lid 15 is fan-shaped, on the direction of rotation of the rear side covering rotating knife 14 of rotating knife 14 Part from the side locations of upstream side to the side in downstream side is (from right side to the left side of the support rod 11 extended along front and back The part in portion), specifically, being covered when from being carried out from upside in from the 3 o'clock position of the side locations as upstream side To the sector of 7 thirty positions of the position of the side as downstream side, cover the range of the side in the left side as downstream side compared with It is narrow.When carrying out so-called edge pruning as shown in Figure 3 using the brush cutter 10, used in a manner of as follows, it may be assumed that with The mode for making the rotation axis of rotating knife 14 become horizontal direction erects rotating knife 14, and the side in the left side of lid 15 is made to incline Tiltedly for the discontiguous angle in ground, make rotating knife 14 oblique front become lower side, cut off grass using the rotating knife 14 of rotation Level ground grass, grass etc..

As shown in Figures 1 and 2, protection body 20 is releasably installed on the front end of support rod 11 by motor shell 13, Protection body 20 be by make the metal wire rods such as metal wire rod be bent made of.Rotating range 14a of the protection body 20 than rotating knife 14 Leading edge potion be highlightedly set to the upside of rotating knife 14 forwards, there is the rotating knife 14 for preventing rotation and the structures such as building The function of contact.Protection body 20 includes: front protruding portion 21, is prolonged forwards from the two sides in the width direction of motor shell 13 It stretches, the outer lateral bend of top end part to the left and right；Trapezoidal hypotenuse portion 22, from the top of front protruding portion 21, diagonally forward inwardly is prolonged It stretches；And front side protection department 23, in the top end part in the trapezoidal hypotenuse portion 22 controlled is connected to each other and to front side substantially It spends curved arc-shaped.Protection body 20 is installed on motor shell in a manner of it can rotate between protective position and retreating position 13, which is protection body 20 from the position that motor shell 13 is prominent forwards and prevents rotating knife 14 from contacting with structure It sets, which is the position by making the front side of protection body 20 keep out of the way protection body 20 and rotation upwards.

As shown in Fig. 2, the trapezoidal hypotenuse portion 22 in left side is located at the oblique front in the left side of protection body 20, seen from rear side Downstream side when examining on the direction of rotation R of rotating knife 14.As shown in Figures 3 and 4, make the rotation axis of rotating knife 14 at For level and with the oblique left front portion of the rotating range 14a of rotating knife 14 be minimum position make rotating knife 14 erect when, left side Trapezoidal hypotenuse portion 22 the left side as downstream side of lid 15 side and the discontiguous position in ground as with turfgrass, grass The grounding parts 22 that the ground of equal growths is contacted in a manner of line contact play a role.

The grounding parts 22 of protection body 20, which have to be located in cut off by the peripheral part of the rotating knife 14 of standing, is grown in ground The function of the position of turfgrass, the grass in face etc..Make rotating knife 14 to make the rotation axis of rotating knife 14 become horizontal mode When standing, grounding parts 22 with straight line, straight line with it is arc-shaped, compare front side protection department 23 for radius of curvature it is biggish arc-shaped Peripheral part and ground face contact.The grounding parts 22 of present embodiment can be with the two sides of the straight line portion 22a of 10mm and straight line portion 22a Radius of curvature is to contact in a manner of the end of the arc sections 22b of 20mm is contacted with ground by line, can be with the length of 30mm and ground Face contacts in such a way that line contacts.As shown in figure 4, be not located at can be with ground in such a way that line contacts for the side in the left side of lid 15 On the extended line E of the grounding parts 22 of contact.

In addition, in the present embodiment, for grounding parts 22, can be set as contacting with the length of 30mm with ground line, But the utility model is not limited thereto, and preferably grounded portion 22 is contacted with ground with the length line of 20mm or more.In addition, grounding parts The longer the better for the length of 22 straight line portion 22a but it is also possible to be the length of straight line portion 22a is 5mm or more, can be in straight line portion At least one end of 22a contacts in such a way that the end for the arc sections 22b that radius of curvature is 20mm or more is contacted with ground by line. Moreover, the radius of curvature of the front side protection department 23 of present embodiment is 130mm but it is also possible to be grounding parts 22 have curvature half The diameter arc-shaped peripheral part bigger than the radius of curvature of front side protection department 23, with the peripheral part and ground of biggish circular arc side with line The mode of contact contacts.Ground as making the contact of grounding parts 22 is ground soft as the soil of the growths such as turfgrass, grass, As long as therefore grounding parts 22 include the arc sections 22b that radius of curvature is 20mm or more, have song in at least side of straight line portion 22a The big arc-shaped peripheral part of the radius of curvature of protection department 23 on front side of rate radius ratio, it will be able to be connect in a manner of being contacted with ground by line Touching.

As shown in Figure 1, control unit 30 includes being fixed on the control shell 31 of the rear end of support rod 11 and in control shell For controlling the controller of the movement of electric motor in body 31.In addition, releasably being installed in the lower part of control shell 31 useful In the battery pack 32 to power electric motors, battery pack 32 is connected to electric motor using the electric wire being disposed in support rod 11.

As shown in Figure 1, the middle part on the front-rear direction of support rod 11 is substantially a ring-shaped equipped with holding for operating personnel Front side lever 33, control shell 31 rear portion integrally provided with substantially a ring-shaped rear side lever 34.It is operated in rear side Handle 34 is equipped with the switch 35 for making electrical motor driven, and electric motor can be due to the opening operation of switch 35 by from battery It organizes 32 power supply and drives.

In the case where brush cutter 10, even if the rotation axis of rotating knife 14 is substantially vertical with ground, rotating knife making 14 rotating range 14a and ground are substantially parallel and in the state of rotating rotating knife 14 using electric motor, pass through operation branch When holding bar 11 swings rotating knife 14 along ground level, the cutting of rotating knife 14 of rotation and cut the grass on a lawn grass, grass etc. are utilized.Such as Shown in Fig. 3 and Fig. 4, using the brush cutter 10 carry out trimming be grown in the structures such as building boundary part turfgrass, When this so-called edge prunings such as grass, erect rotating knife 14 to make the rotation axis of rotating knife 14 become horizontal mode, Make the ground face contact of the growths such as grounding parts 22 and turfgrass, the grass of the oblique front in a left side for protection body 20.At this point, the side in the left side of lid 15 Portion is not located at contacted with ground by line in a manner of on the extended line E of grounding parts 22 that contacts, therefore, even if making grounding parts 22 and ground Face contact, the side in the left side of lid 15 also not with ground face contact.If configured the grounding parts 22 of protection body 20 to and building Equal structures are parallel, make grounding parts 22 and ground face contact and move along its linearly extended direction, then can make the rotation rotated Rotor 14 is moved along structures such as buildings, can be grown in the construction such as building with straight line and the cutting of neat trim edge Turfgrass, grass of the boundary part of object etc..

The brush cutter constituted as described above includes protection body 20, which includes front side protection department 23, in circle Arc leans on the position of front side in the leading edge potion that the front end of support rod 11 is set to the rotating range 14a than rotating knife 14, for protecting Protect the front side of the rotating range 14a of rotating knife 14；And grounding parts 22, so that the rotation axis of rotating knife 14 becomes horizontal Mode make rotating knife 14 erect when, the grounding parts 22 with as straight line portion 22a and arc sections 22b it is continuous made of peripheral part and ground Contact.If making rotating knife 14 make protection body in the state of standing to make the rotation axis of rotating knife 14 become horizontal mode 20 grounding parts 22 contact in a manner of along structure being contacted with ground by line, and make the grounding parts 22 of protection body 20 along with The rectilinear direction of ground line contact is mobile, then can linearly carry out edge pruning along the boundary part of structure, can make Trim edge after edge pruning is good.In addition, grounding parts 22 be not limited to it is continuous by straight line portion 22a and arc sections 22b and At peripheral part, it is possible to have be only straight line peripheral part or with the radius of curvature than arc-shaped front side protection department 23 The arc-shaped peripheral part of big radius of curvature connects in a manner of also grounding parts 22 capable of being made to contact with ground by line when such Touching.

In addition, the brush cutter 10 includes lid 15, the lid 15 is in a manner of the rear side of rotating range 14a for covering rotating knife 14 Set on the front end of support rod 11, lid 15 is fan-shaped, rotating knife 14 rear side covering rotating knife 14 direction of rotation on from The side locations of upstream side to downstream side side part.Direction of rotation when being observed with the slave rear side of rotating knife 14 On downstream side side be downside and make rotating knife 14 rotation axis become horizontal mode make rotating knife 14 erect when, Lid 15 and the discontiguous position in ground are equipped with grounding parts 22.Thereby, it is possible to not contacted with the side in the downstream side of lid 15 with ground Mode make grounding parts 22 and ground face contact.

In the brush cutter constituted as described above, rotating knife 14 is using linear nylon wire, but the utility model is not Be confined to this, also can be used the rotating knife being made of the blade being arc-shaped, plectane circumference have blade rotating knife.

In the brush cutter constituted as described above, protection body be by make the metal wire rods such as metal wire be bent made of, But the utility model is not limited thereto, and can also be equipped with Web materials in the inside of the metal wire rods such as metal wire, can also is in Plate.

Claims (4)

1. a kind of brush cutter, which is characterized in that

The brush cutter includes:

Rotating knife can rotatably be set to the front end of support rod；And

Protection body, with front side protection department and grounding parts, which is arc-shaped, and the front side protection department is described The leading edge potion that the front end of support rod is set to the rotating range than the rotating knife leans on the position of front side, for protecting the rotation The front side of the rotating range of knife erects the rotating knife to make the rotation axis of the rotating knife become horizontal mode When, the grounding parts are with straight line, straight line and arc-shaped or radius of curvature is biggish arc-shaped for comparing the front side protection department Peripheral part and ground face contact.

2. brush cutter according to claim 1, which is characterized in that

The brush cutter includes lid, is set to the support rod in a manner of the rear side of rotating range of the lid to cover the rotating knife Front end,

It is described lid it is fan-shaped, the rotating knife rear side cover the rotating knife direction of rotation on the side from upstream side The part of the side in position to downstream side,

Downside is in the side in the downstream side on direction of rotation when being observed using the slave rear side of the rotating knife and makes described When the rotation axis of rotating knife erects the rotating knife as horizontal mode, set in the lid with the discontiguous position in ground There are the grounding parts.

3. brush cutter according to claim 1 or 2, which is characterized in that

The protection body is formed by bending metals wire rod.

4. a kind of protection body of the rotating knife of brush cutter is used to protect the rotation of the front end for the support rod for being set to brush cutter Knife, which is characterized in that

The protection body of the rotating knife of the brush cutter includes front side protection department, is arc-shaped, sets in the front end of the support rod The position of front side is leaned in the leading edge potion of the rotating range than the rotating knife, before the rotating range for protecting the rotating knife Side；And grounding parts, when erecting the rotating knife to make the rotation axis of the rotating knife become horizontal mode, this is connect Ground portion with straight line, straight line with it is arc-shaped or compare the biggish arc-shaped periphery of radius of curvature for the front side protection department Portion and ground face contact.