CN2303444Y

CN2303444Y - Grass cutter

Info

Publication number: CN2303444Y
Application number: CN 97220647
Authority: CN
Inventors: 黄罗金珠
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-08-05
Filing date: 1997-08-05
Publication date: 1999-01-13
Anticipated expiration: 2007-08-05

Abstract

The utility model relates to a grass cutter. Dynamic force for the rotation of a carbon brush type electromotor is converted to the dynamic force for the reciprocating swing of the carbon brush type electromotor through the proper physical design of an eccentric cam and a swing ring; two mutually attached dentition formula circular cutting knives are driven to reversely and rapidly perform relative reciprocating torsion motion of a minor angle; the utility model cuts grass in the form of opposite cutting; a problem that broken branches and scattered leaves fly and are puffed all around can not be no longer generated when the grass is cut; a lawn is enabled to be much more smooth and sanitary; the utility model can still normally and effectively operate on the lawn arranged on a bumpy area and a wall corner, and the utility model can still normally and effectively operate on the lawn which is arranged near a fence or is hidden with small breakstone inside; the output torque force of the utility model is strong, the rate in favorably accomplishing the cutting operation of the utility model is high, and the utility model has extremely operational safety.

Description

Mower

The utility model relates to mower, is meant a kind ofly by the electro-motor outputting power especially, and exports the quick mower of the scissors movement of powerful reciprocating action through special designed drive and follower.

The general mower that uses utilizes gasoline engine or electro-motor as power mostly, relend steel round cutting-off tool, steel bar or plastic strip high speed rotating that multiple sets of teeth wheel transmission or reducing gear are driven the bottom, cut disconnected careless class or the plant that touches in order to moment, reach rapidly and purpose that high efficiency is mowed; Yet, when reality is used this kind rotary mower, the puzzlement of normal appearance be the higher disconnected branch of the part that cut of careless class or plant or its hardness all can be along the direction of rotation of round cutting-off tool, steel bar or plastic strip under effect of inertia spray everywhere fly, cause the careless detritus that breaks on peripheral flower garden or the road to be abound with, be difficult to tidy up; Its fines then will fly away in air, cause the air aerosol concentration too high and cause air pollution and dust fall and increase, and influence health; Because round cutting-off tool, steel bar or the plastic strip of this mower are when operation, adopt the high speed rotating mode, so when running into rugged rugged topography, corner, hedge limit or running into the stone that is hidden in from the grass, for avoiding damaging cutter, usually all walk around and disregard, cause the weedy procreation at this place, be repugnant to the eye; The most important thing is that just in case note accidentally or not being played by innocent child, its output link will have serious incised wound people's danger when operation; Especially the gasoline engine of this kind rotary mower or electro-motor be often because of the improper harsh noise that produces of its transmission mechanism or reducing gear design, and the heavy consume easily of the load of engine or motor, minimizing service life.

At above-mentioned defective, the inventor is through thinking in detail, and long-pending research and development and the marketing experience of being engaged in various farm machinery and relevant spare part thereof for many years, several times manufactures experimently and studies, and creates the technical solution of the utility model finally.

The purpose of this utility model is to provide a kind of mower, it adopts the power unit of carbon brush formula electro-motor to drive gear unit, borrow the fit of eccentric cam set in the gear unit with the pendulum ring, make the rotary power of power unit be convertible into the power of making reciprocally swinging, impelling the two tooth-like round cutting-off tools that fit in the action group can do oppositely low-angle past relatively covering reverses, to mow to cutting kenel, make when mowing and do not cause residul branch and leaf to spray the puzzlement that flies everywhere, and still can normal operation on rugged regional corner, hedge limit.

The purpose of this utility model is achieved in that

A kind of mower comprises casing unit, power unit, gear unit and motor unit, it is characterized in that: this casing unit comprises holding part, bar portion and main frame portion; This power unit is installed in the main frame portion of casing unit, based on electro-motor, is output with the helical gear; This gear unit is installed in place, power unit below, comprise, bottom plate and be hubbed on this side by side, first transmission group between bottom plate, second transmission group and driven group, wherein be equiped with one group of mother and sons' gear on first transmission group at least, this mother's gears engaged is in the helical gear of power unit, at least be equiped with a gear and first eccentric cam on second transmission group, second eccentric cam, the sub-gear of this gears engaged on first transmission group, two eccentric cams are oppositely done 180 degree installings at interval, keep equal angles to do between this two eccentric cam with the eccentric rotation of speed, at least being equiped with the first pendulum ring on this driven group is axle with the second pendulum ring and with changing of the relative positions axle, this first pendulum ring is installed on the changing of the relative positions axle, this second pendulum ring then is pivoted thereon movably, and makes this two pendulum ring difference snare on the eccentric cam of correspondence; This motor unit is connected with below driven group of gear unit, at least the changing of the relative positions part that comprises the first tooth-like round cutting-off tool, the second tooth-like round cutting-off tool, last disk cover, following disk cover and the extension of described changing of the relative positions axle that the tip edge place fits, should go up disk cover and first tooth-like round cutting-off tool interlocking and affixed with the second pendulum ring mutually, this changing of the relative positions part bottom and following disk cover difference interlocking are on the above and below of the second tooth-like round cutting-off tool.

The outer sheathed ball bearing of this each eccentric cam.

This electro-motor is the carbon brush formula, is made of sleeve, spiral cover institute interlocking, and this sleeve is installed in the casing unit corresponding to electric motor power axle place, sleeve carbon-point then in the spiral cover.

Major advantage of the present utility model is: mower of the present utility model is with the rotary power of single electro-motor matching by eccentric cam in the gear unit and pendulum ring, convert reciprocally swinging power to, impel that two tooth-like round cutting-off tools can do respectively that reverse low-angle reverses to cutting, carry out cutting operation safe and that efficient is high, not only make regional smooth beautiful, the health of processing, and more can be applicable in rough place and deeper dead angle or the narrow slit effect of promoting its progressive.

Fig. 1 is stereoscopic figure of the present utility model;

Fig. 2 is a STRUCTURE DECOMPOSITION stereogram of the present utility model;

Fig. 3 is the STRUCTURE DECOMPOSITION stereogram of power unit of the present utility model;

Fig. 4 is the STRUCTURE DECOMPOSITION stereogram of gear unit of the present utility model;

Fig. 5 is the STRUCTURE DECOMPOSITION stereogram of motor unit of the present utility model;

Fig. 6 is the stereogram of part combining structure of the present utility model;

Fig. 7 is the end view of part combining structure of the present utility model;

Fig. 8 is the schematic diagram of eccentric cam action one of the present utility model;

Fig. 9 is the schematic diagram of eccentric cam action two of the present utility model.

Consult Fig. 1,2,3,4,5, the utility model mainly comprises casing unit 1, power unit 2, gear unit 3 and motor unit 4, wherein:

Casing unit 1 (as shown in Figure 2) comprises the main frame portion 12 that can cover principal organ such as power unit 2, gear unit 3 and motor unit 4 for the holding part 10 that grips and have push switch 100, the bar portion 11 of extending and cover.

Power unit 2 (as shown in Figure 3) is installed in place, main frame portion 12 tops in the casing unit 1, mainly constitute by carbon brush formula electro-motor 20, the electronic one-tenth of this carbon brush formula reaches 20 line shaft tail end two sides and is respectively conflicted (as shown in Figure 1) by corresponding and removable carbon brush 21, these carbon brush 21 structures are spirally connected by sleeve 210 and spiral cover 211 to be constituted, sleeve is mounted in the main frame portion 12 of casing unit 1, spiral cover 211 is planted for removable carbon-point, be locked on the sleeve 210, make carbon-point can conflict line shaft to promote the running efficiency of electro-motor 20; Electro-motor 20 outputs are helical gear 200.

Gear unit 3 (as shown in Figure 4), by power unit 2 is driven, be responsible for conversion power output pattern to grasp from motor unit 4, mainly by be fixed in the casing unit 1 main frame portion 12 on,

bottom plate

30 and 31 are pivoted with first transmission group 32 side by side in regular turn respectively, second transmission group 33 with driven group 34, wherein first transmission group 32 includes power transmission shaft 320 at least, by female gear 321 and sub-gear 322 and the change-speed gearing that closes, bearing 323 and packing ring 324 etc., the many female gears 321 of the big dawn number of teeth of diameter directly are meshed with the helical gear 200 of electro-motor 20, simultaneously diameter is meshed with gear 330 in adjacency second transmission group 33 than 322 of few sub-gears of role of a young woman in traditional opera's number of teeth, the number of teeth of this gear 330 and diameter all are higher than sub-gear 322, and the high rotating speed that makes electro-motor 20 can suitably be slowed down and increases torsion at this; The structure of second transmission group 33 is except that aforesaid gear 330, at least still comprise power transmission shaft 331, first ball bearing 332, second ball bearing 333, bearing 334, packing ring 335, first eccentric cam 336, second eccentric cam 337, wherein first, second eccentric cam 336 and 337 is set in respectively in first, second corresponding ball bearing 332 and 333, and back span 180 degree installings are done the eccentric rotation of predetermined space angle with the rotation of gear 330; Driven group 34 comprise bearing 340 at least, packing ring 341, ball bearing 342, the C shape clasp 343 and the first pendulum ring 344, the second pendulum ring 345 and be the axle center with the changing of the relative positions axle 440 of following motor unit 4, wherein ball bearing 342 is set in the bottom plate 31, first, all offer the slide opening of slotted eye in the second pendulum ring 344 and 345, and snare each correspondence in second transmission group 33 is arranged with first respectively, second eccentric cam 336 and 337 first, outside second ball bearing 332 and 333, and make this two eccentric cam its moving partially direction when rotating just opposite with respect to each pendulum ring, facilitate two pendulum rings can do incorgruous relative swing, eccentric cam is consulted Fig. 8 with respect to the action of pendulum ring, shown in 9, will rotatablely move is transformed into reciprocal oscillating motion.

Action group 4 (as shown in Figure 5) connects the below that is located at driven group 34, comprise the first tooth-like round cutting-off tool 40, the second tooth-like round cutting-off tool 41, last disk cover 42, following disk cover 43 and changing of the relative positions part 44, wherein going up disk cover 42 is locked on the first tooth-like round cutting-off tool 40, changing of the relative positions part 44 and down disk cover 43 be locked in respectively the second tooth-like round cutting-off tool 41 on, below on, changing of the relative positions axle 440 on the changing of the relative positions part 44 passes the first tooth-like round cutting-off tool 40 in regular turn, last disk cover 42 is hubbed on the upper mounted plate 30 with driven member 34, and overlapped solid by the first pendulum ring 344, make the second tooth-like round cutting-off tool 41 do low-anglely back and forth to reverse with the swing of the first pendulum ring 344, the second pendulum ring 345 is fixed in disk cover 42 tops accordingly, make the first tooth-like round cutting-off tool 40 make low-angle but different back and forth the reversing of direction with the swing of the second pendulum ring 345, what must pay special attention to is, the first tooth-like round cutting-off tool 40 of Joint, the last disk cover 42 and the second pendulum ring 345 all are hubbed on the changing of the relative positions axle 440 of changing of the relative positions part 44 movably, make the first pendulum ring, the 344 and second pendulum ring 345 all can drive to mutually noninterfere the second tooth-like round cutting-off tool 41 and the first scissors round cutting-off tool 40 respectively.

By the above-mentioned architectural characteristic and the relevant position of each member, the assembling back constitutes complete mower structure, (as Fig. 1,6, shown in 7), its actual operating state is: when starting switch 100, electro-motor 20 produces rotary power, this rotary power is through first of gear unit 3, second transmission group 32 and 33 speed changes, and via first in second transmission group 33, second cam 336 and 337 and driven group 34 in first, the 344 corresponding cooperations of the second pendulum ring with 345, rotational power is changed into the swing power that back and forth waves in the opposite direction, borrow the first tooth-like round cutting-off tool 40 and the second tooth-like round cutting-off tool 41 respectively without interfering with each other with the second pendulum ring, 345 and first pendulum ring 344 Joints and impel the first tooth-like round cutting-off tool 40 and reverse low-angle relative the reversing of second tooth-like round cutting-off tool 41 each work at last, because the tooth lattice place in this two round cutting-off tools ring week fits, so can carry out fast, powerful, carry out the scissors cutting operation effectively.

Because mower of the present utility model revolving mower different from the past commonly used, utilize to intersect fast the mode of cutting is reached cutting operation, as long as therefore the target of this mower towards the desire arrangement advanced, then be that the careless class that contacted of two round cutting-off tools or plant are flushed equably and cut off standardizedly, and because of careless class and plant are cut off in moment then and there, so residual leaf of being cut, residual branch and detritus etc. can't fly or fly away aerial puzzlement phenomenon as the spray everywhere as the structure commonly used, and can directly drop in the original place, help clearing up conveniently afterwards, especially only do low-angle because of two tooth-like round cutting-off tools to cutting action, and real to carry out the structure of cutting be two inner edges at each its corresponding teeth lattice of tooth-like round cutting-off tool, but not on outermost periphery, therefore both made and touched barrier, also only can wear and tear this periphery slightly and can directly not undermine most important inner edge, and because each round cutting-off tool is only done low-angle twisting back and forth, each tooth especially wearing and tearing distance in week is also quite short, so it is more extensive that the round cutting-off tool of its steel can touch the zone of stretching, to the suitable rugged area of taboo of commonly used rotary mower institute, the corner, cutting operation all can be carried out effectively in hedge limit or the lawn that is concealed with finger stone, thorough uproot weeds, the more important thing is, so that the mode of cutting is mowed, its tooth compartment to cut the width of cloth very little, do not have the part of hurting sb.'s feelings, its safety is good than common structure more.

On the other hand, with regard to the effective utilization of constructional device, because electro-motor 20 outputting powers are suitably to slow down through two transmission groups that have associated gear in the gear unit 3, so can alleviate the load of electro-motor 20 effectively and strengthen torsion, and this electro-motor 2 adopts the splendid carbon brush formula of usefulness, carbon brush can conveniently be pulled down when excessive wear and upgrade, so all can significantly prolong the service life of electro-motor 20 and whole mower structure and reduce noise and fault rate.

In sum, mower of the present utility model is with the rotary power of single electro-motor matching by eccentric cam in the gear unit and pendulum ring, convert reciprocally swinging power to, impel that two tooth-like round cutting-off tools can do respectively that reverse low-angle reverses to cutting, carry out cutting operation safe and that efficient is high, not only make regional smooth beautiful, the health of processing, and more can be applicable in rough place and deeper dead angle or the narrow slit effect of promoting its progressive.

Claims

1. a mower comprises casing unit, power unit, gear unit and motor unit, it is characterized in that: this casing unit comprises holding part, bar portion and main frame portion; This power unit is installed in the main frame portion of casing unit, based on electro-motor, is output with the helical gear; This gear unit is installed in place, power unit below, comprise, bottom plate and be hubbed on this side by side, first transmission group between bottom plate, second transmission group and driven group, wherein be equiped with one group of mother and sons' gear on first transmission group at least, this mother's gears engaged is in the helical gear of power unit, at least be equiped with a gear and first eccentric cam on second transmission group, second eccentric cam, the sub-gear of this gears engaged on first transmission group, two eccentric cams are oppositely done 180 degree installings at interval, keep equal angles to do between this two eccentric cam with the eccentric rotation of speed, at least being equiped with the first pendulum ring on this driven group is axle with the second pendulum ring and with changing of the relative positions axle, this first pendulum ring is installed on the changing of the relative positions axle, this second pendulum ring then is pivoted thereon movably, and makes this two pendulum ring difference snare on the eccentric cam of correspondence; This motor unit is connected with below driven group of gear unit, at least the changing of the relative positions part that comprises the first tooth-like round cutting-off tool, the second tooth-like round cutting-off tool, last disk cover, following disk cover and the extension of described changing of the relative positions axle that the tip edge place fits, should go up disk cover and first tooth-like round cutting-off tool interlocking and affixed with the second pendulum ring mutually, this changing of the relative positions part bottom and following disk cover difference interlocking are on the above and below of the second tooth-like round cutting-off tool.

2. mower as claimed in claim 1 is characterized in that: the outer sheathed ball bearing of this each eccentric cam.

3. mower as claimed in claim 1 or 2 is characterized in that: this electro-motor is the carbon brush formula, is made of sleeve, spiral cover institute interlocking, and this sleeve is installed in the casing unit corresponding to electric motor power axle place, sleeve carbon-point then in the spiral cover.