CN2852655Y

CN2852655Y - Rotary cutting device

Info

Publication number: CN2852655Y
Application number: CN 200520134348
Authority: CN
Inventors: 黄以良
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-28
Filing date: 2005-12-28
Publication date: 2007-01-03
Anticipated expiration: 2015-12-28

Abstract

The utility model relates to a rotary cutting device, which comprises an enclosure (1), a motor (2), a drive member and a cutter head assembly. Wherein the drive member includes a small driving wheel (3), a large driving wheel (4), and a drive belt (5). The cutter head assembly includes a rotary shaft (6) connected with the large driving wheel (4), a plurality of blades (7) connected with a rotary shaft (6), and a cutter cover (8) which is fixed to the bottom of the enclosure (1) with a discharge outlet at one side, covering the blades (7). The cutter body at the rear of the cutting edge (71) of the blade (7) is equipped with a warped extension member (72). The utility model is characterized in that the warped extension member forms a guiding side for a smooth transition enabling the function concurrently of cutting, guiding and feeding. Since the blades are connected directly with the rotary shaft, the cutting strength of the blades can be enhanced. Furthermore, the components required by the cutter head assembly can be greatly reduced greatly, simple in structure and easy to assemble.

Description

A kind of rotary cutter sweep

Technical field

The utility model relates to a kind of gardening electric tool, especially refers to a kind of rotary cutter sweep.

Background technology

Existing garden instrument or the agricultural tool of being used for, as hedge trimmer, finishing shrub branch cut a machine, lawn machine etc., all exist inefficiency, operation to have the defective of certain risk, and the end of the branch that cleaning is sheared off is not only consuming time but also loaded down with trivial details.So many operating efficiencies are higher, simple operation and safe and reliable rotary cutter sweep are invented, and are the Chinese utility model patent " gardening trimmer " of ZL200420003681.9 (notification number is CN2686306Y) as the patent No..This trimmer comprises casing, be positioned at motor and the transmission mechanism and the tool bit assembly of casing, switch is housed on casing, wherein transmission mechanism comprises little drive, large drive wheel and driving-belt, little drive is contained on the output shaft of motor, large drive wheel is fixed on the upper end of rotating shaft, driving-belt is located between little drive and the large drive wheel, and tool bit assembly comprises the cutter head cover, impeller with blade, be located at the blade of blade front end, rotating shaft, cutterhead, minor axis, bearing cap, upper bearing (metal), lower bearing, the cutter head cover is provided with discharging opening, this cutter head cover is fixed on the bottom, casing front side, be provided with for the collecting box of collecting broken branch in the casing bottom, the discharging opening of opening on the collecting box and cutterhead cover joins, the middle part of rotating shaft is contained on the axis hole of cutter head cover by bearing cap and upper bearing (metal), cutterhead is by being bolted on the cutter head cover, impeller is contained in the rotating shaft, minor axis is fixed on the axis hole of wheel bottom, minor axis is contained on the axis hole of cutterhead by lower bearing, cutterhead is provided with several mouthfuls, leaves certain clearance between cutterhead and the blade.During work, the little drive of motor-driven, and by driving-belt drive large drive wheel, then make the rotating shaft high speed rotating under the large drive wheel, thereby make also high speed rotating thereupon of impeller and blade, rely on the blade of high speed rotating to cut branch, the broken branch that is cut is through impeller and be thrown to eccentrically among the cutter head cover, be collected into collecting box from the discharging opening of cutter head cover then among.The blade of this trimmer and impeller be separate machined individually; assembling together at last; blade generally directly is fixed on the blade edge of impeller by screw; also promptly need and be transferred on the blade through impeller from the output of rotating shaft; blade directly is not fixed on the rotating shaft; so just directly reduced the working strength of trimmer itself; because of blade is directly to cut hard thing such as branch, run into brute force through regular meeting, in the course of time; blade; loosening easily between impeller and the rotating shaft; even the damage impeller, will have a strong impact on the work of this trimmer like this, and these tool bit assembly parts are more; structure is also very complicated, is not easy to assembling.

Summary of the invention

Technical problem to be solved in the utility model is to improve the rotary cutter sweep that the higher and structure of a kind of working strength is simple more, be easier to assemble at the present situation of prior art.

The utility model solves the problems of the technologies described above the technical scheme that is adopted: this rotary cutter sweep, include casing, be positioned at motor and the transmission mechanism and the tool bit assembly of casing, wherein, described transmission mechanism comprises the little drive on the output shaft that is arranged on described motor, large drive wheel and the driving-belt that is located between the two, and described tool bit assembly comprises the rotating shaft that links to each other with described large drive wheel transmission, the blade that links to each other with this rotating shaft transmission and be fixed on the described bottom of shell and a side has the cutter cover of discharging opening, this cutter cover just covers described blade within it, and it is characterized in that: the blade of its blade back of described blade has the extension that is upturned.

For making blade link to each other more firm with the transmission of rotating shaft, to guarantee the rotation dynamics of blade, described rotating shaft periphery can be connected with tool rest, be inserted with alignment pin on this tool rest bottom with being centrosymmetric, and described blade is having through hole to position that should alignment pin, wear described blade and blade is positioned under the described tool rest by this alignment pin, and also be provided with the bearing block that is fixed on the described tool rest under the bottom of described alignment pin, this bearing block is provided with the groove that adapts with it in the position of the described alignment pin of correspondence, thereby described alignment pin is fixed on tightly the bottom of described tool rest, also guaranteed simultaneously fitting tightly of blade and tool rest bottom, made rotating shaft then, tool rest, alignment pin, the rotary body of one integrated mass when but blade constitutes high speed rotating.

Because of this cutter sweep generally in order to cutting cross section roughly rounded objects such as branch, better for the cutting effect that makes blade, the blade of described blade can undulate.

For preventing that blade from exposing in the casing outside, on the bottom margin of described cutter cover, can also be fixed with blade guard, and be on this blade guard and be provided with a plurality of openings radially, blade is just protected by this blade guard like this.

Similarly, be to strengthen the cutting effect of blade, also can undulate on the opening of described blade guard with tangent that edge of described blade.

Cut the broken branch that comes for collecting blade better, described casing bottom can also be provided with the collecting bag and the drainage conduit of collecting broken branch, and this drainage conduit just is connected between the opening of the discharging opening of described cutter cover and described collecting bag.

Compared with prior art, advantage of the present utility model is: by the blade of its blade back of blade is designed to have the extension that is upturned, form the leading edge of rounding off, make it have the effect of cutting and water conservancy diversion feeding simultaneously, blade is when high speed rotating like this, its blade directly cuts branches and leaves, and the broken branch that is cut is just thereupon along the extension of the blade whipping that makes progress, under the situation of high speed rotating, just by centrifugal whipping in the cutter cover, just output to the collecting bag then from the discharging opening of cutter cover one side, this rotary cutter sweep has omitted the setting of original impeller, make blade can be directly and rotating shaft be in transmission connection, can directly strengthen the cutting hardness of blade, improve the working strength of cutter sweep greatly, and the required number of components of tool bit assembly is reduced greatly, and structure is simpler, is easier to assembling, and service life is also longer; Simultaneously, blade and blade guard opening both are made into wave-like, have considered actual application environment fully, by both cooperations, can cut the roughly rounded twig in cross section easily, are very suitable for practical application.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the partial schematic diagram of the utility model embodiment;

Fig. 3 is the structural representation of blade in the utility model;

Fig. 4 is the vertical view of Fig. 3;

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As Fig. 1～shown in Figure 4, this rotary cutter sweep includes casing 1, is positioned at motor 2 and the transmission mechanism and the tool bit assembly of casing 1;

Wherein, transmission mechanism comprises brief biography driving wheel 3, the large drive wheel 4 on the output shaft that is arranged on described motor 2 and is located between the two driving-belt 5;

And described tool bit assembly comprises rotating shaft 6, the blade 7 that links to each other with these rotating shaft 6 transmissions that links to each other with described large drive wheel 4 transmissions and be fixed on described casing 1 bottom and a side has the cutter cover 8 of discharging opening, and this cutter cover 8 just described blade 7 covers within it;

Blade 71 undulates of described blade 7, and the blade of its blade 71 back has the extension 72 that is upturned;

Described rotating shaft 6 peripheries are connected with tool rest 9, be inserted with alignment pin 10 on these tool rest 9 bottoms with being centrosymmetric, and described blade 7 is having through hole 73 to position that should alignment pin 10, wear blade 7 and blade 7 is positioned under the described tool rest 9 by this alignment pin 10, and also be provided with the bearing block 91 that is fixed on the tool rest 9 under the bottom of alignment pin 10, this bearing block 91 is provided with the groove 91a that adapts with it in the position of corresponding alignment pin 10;

Also be fixed with blade guard 81 on the bottom margin of described cutter cover 8, and be on this blade guard 81 and be provided with a plurality of opening 81a radially, the opening 81a of described blade guard 81 goes up and tangent that edge 81b of described blade 71 also undulate;

Described casing 1 bottom also is provided with the collecting bag 12 and the drainage conduit 11 of collecting broken branch, and this drainage conduit 11 just is connected between the opening of the discharging opening of described cutter cover 8 and described collecting bag 12.

During work, motor 2 drives brief biography driving wheel 3, then drive large drive wheel 4 through driving-

belt

5,4 of large drive wheels drive rotating shaft 6, tool rest 9, alignment pin 10, bearing block 91 and blade 7 high speed rotating together under it, the blade 7 of this high speed rotating is met the branches and leaves that cut to needs, branches and leaves pass the opening 81a of blade guard 81, cut off the back among the extension 72 of blade is thrown to cutter cover 8 backward thereupon by the blade 71 of blade 7, discharging opening, the drainage conduit 11 through cutter cover 8 one sides is collected among the collecting bag 12 then.

Claims

1, a kind of rotary cutter sweep, include casing (1), be positioned at motor (2) and the transmission mechanism and the tool bit assembly of casing (1), wherein, described transmission mechanism comprises the little drive (3) on the output shaft that is arranged on described motor (2), large drive wheel (4) and be located between the two driving-belt (5), and described tool bit assembly comprises the rotating shaft (6) that links to each other with described large drive wheel (4) transmission, the blade (7) that links to each other with this rotating shaft (6) transmission and be fixed on described casing (1) bottom and a side has the cutter cover (8) of discharging opening, just described blade (7) cover within it, it is characterized in that: the blade of its blade of described blade (7) (71) back has the extension (72) that is upturned to this cutter cover (8).

2, rotary cutter sweep according to claim 1, it is characterized in that: described rotating shaft (6) periphery is connected with tool rest (9), this tool rest (9) is inserted with alignment pin (10) on the bottom with being centrosymmetric, and described blade (7) is having through hole (73) to position that should alignment pin (10), wear described blade (7) and blade (7) is positioned under the described tool rest (9) by this alignment pin (10), and also be provided with the bearing block (91) that is fixed on the described tool rest (9) under the bottom of described alignment pin (10), this bearing block (91) is provided with the groove (91a) that adapts with it in the position of the described alignment pin of correspondence (10).

3, rotary cutter sweep according to claim 1 is characterized in that: blade (71) undulate of described blade (7).

4, according to claim 1 or 2 or 3 described rotary cutter sweeps, it is characterized in that: on the bottom margin of described cutter cover (8), also be fixed with blade guard (81), and be on this blade guard (81) and be provided with a plurality of openings (81a) radially.

5, rotary cutter sweep according to claim 4 is characterized in that: that edge (81b) that the opening (81a) of described blade guard (81) is gone up and described blade (71) is tangent is undulate also.

6, according to claim 1 or 2 or 3 described rotary cutter sweeps, it is characterized in that: described casing (1) bottom also is provided with the collecting bag (12) and the drainage conduit (11) of collecting broken branch, and this drainage conduit (11) just is connected between the opening of the discharging opening of described cutter cover (8) and described collecting bag (12).