CN105909749A - Overload protection mechanism and hedge trimmer using same - Google Patents
Overload protection mechanism and hedge trimmer using same Download PDFInfo
- Publication number
- CN105909749A CN105909749A CN201610464564.XA CN201610464564A CN105909749A CN 105909749 A CN105909749 A CN 105909749A CN 201610464564 A CN201610464564 A CN 201610464564A CN 105909749 A CN105909749 A CN 105909749A
- Authority
- CN
- China
- Prior art keywords
- gear
- eccentric
- groove
- draw
- steel ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H35/00—Gearings or mechanisms with other special functional features
- F16H35/10—Arrangements or devices for absorbing overload or preventing damage by overload
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H35/00—Gearings or mechanisms with other special functional features
- F16H35/10—Arrangements or devices for absorbing overload or preventing damage by overload
- F16H2035/103—Arrangements or devices for absorbing overload or preventing damage by overload with drive interruption by structural failure of overload preventing means, e.g. using shear pins
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Harvester Elements (AREA)
- One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)
Abstract
The invention discloses an overload protection mechanism and a hedge trimmer using the same. The overload protection mechanism comprises a gear and an eccentric wheel mounted on the inner ring of the gear, wherein a plurality of clamping grooves are formed in the inner ring of the gear; a plurality of shaft holes are correspondingly formed in the axial direction inside the eccentric wheel; springs are arranged in the shaft holes in a compressed manner; steel balls are arranged at the outer ends of the springs, and clamped in the clamping grooves under the action of the springs; the eccentric wheel and the gear are mutually connected through the springs and the steel balls, the steel balls are pressed by the springs inside the gear, torque transmission is achieved, and the eccentric wheel is driven to rotate; during overload protection, the steel balls are divorced from the clamping grooves, thereby achieving the overload protection function; and when the cutting time is prolonged, parts are not easy to abrade and the cutting efficiency of the hedge trimmer is not easy to influence. By adoption of the overload protection mechanism provided by the invention, the technical problems that a conventional overload protection mechanism is complex in structure and the possibility of abrasion of parts is high can be solved.
Description
Technical field
The present invention relates to Landscape Greening Machines technical field, it is more particularly related to a kind of overload protecting mechanism and making
With the GREEB HEDGE MACHINE of this kind of mechanism.
Background technology
Along with the enhancing of people's environmental consciousness, green plants is had deep love for by more and more people and is promoted, city's green areas day
Benefit increases, but owing to growth of green plants speed is fast, people have to prune it, beautify, the most manual
Pruning extremely difficult to large area green plants, the manpower and materials of input are excessive, thus invented GREEB HEDGE MACHINE, GREEB HEDGE MACHINE
Belong to afforestation specific purpose tool, be used for pruning to branch, shrub etc., easy to operate, efficiency is high.
GREEB HEDGE MACHINE overcurrent protection structure mainly uses disk spring type friction clutch structure, the elastic force produced by disc spring at present, will carry
The eccentric of cutting blade motion is pressed on gear.When cutting to relatively fat tree branch, the maximum that motor overcomes disc spring to be provided is rubbed
Wiping power, makes relative slip between eccentric with gear, reaches the purpose of overload protection.The shortcoming of this structure: structure is multiple
Miscellaneous and dimension precision requirement is high, and during long term overloading protection, owing to being constantly in friction clutch state, caloric value is relatively big,
Cause part easy to wear, cause maximal friction to reduce, affect cutting efficiency, even cannot cut.
Therefore, in view of problem above, it is necessary to propose the overload protecting mechanism of a kind of GREEB HEDGE MACHINE.
Summary of the invention
It is an object of the invention to solve at least the above, and the advantage that at least will be described later is provided.
It is a still further object of the present invention to provide a kind of overload protecting mechanism and use the GREEB HEDGE MACHINE of this kind of mechanism, existing to solve
There is the technical problem that GREEB HEDGE MACHINE overload protecting mechanism structure is complicated and part is easy to wear.
In order to realize according to object of the present invention and further advantage, it is provided that a kind of overload protecting mechanism, including: gear
With the eccentric being arranged on inner ring gear, wherein, described inner ring gear offers several draw-in grooves, in described eccentric
Portion's axially correspondence offers several axis holes, and in described axis hole, compression is provided with spring, and the outer end of described spring is provided with steel ball,
Described steel ball is fastened in described draw-in groove under the effect of described spring.
Preferably, described draw-in groove symmetry is opened on described inner ring gear, and described draw-in groove axially penetrates through the inner ring of described gear
Wall.
Preferably, described draw-in groove is arcuate structure, and the degree of depth of described draw-in groove is less than the radius of described steel ball, the two of described draw-in groove
End is provided with lead angle structure.
Preferably, described eccentric rotates the inner ring being arranged on described gear, and described spring is arranged on institute by the compression of described steel ball
State in axis hole.
Preferably, described axis hole and described draw-in groove one_to_one corresponding, described steel ball is under the compressing of described spring, and outside is fastened on
In described draw-in groove, inner side is fastened in described axis hole.
Preferably, the set-up mode of described spring is: when eccentric normal operating condition, and described spring radical elasticity is more than
Described draw-in groove is applied to the radial thrust on described steel ball；When eccentric stall, described spring radical elasticity is less than described card
Groove is applied to the radial thrust on described steel ball.
Preferably, one end of described inner ring gear is provided with annular stop portion, and axial one end of described eccentric radially extends and sets
Being equipped with annular boss, described geared sleeve is located at described eccentric periphery, and described boss is spacing on described limiting section.
Preferably, described camshaft is provided with gear tabletting to other end pressing, and the radius of described gear tabletting is more than described
The radius of eccentric, described eccentric and described gear tabletting axial restraint connect.
Preferably, the both ends of the surface of described eccentric being respectively arranged with a cam, described cam outwards runs through described gear pressure
Sheet, described cam is connected with knife assembly by rocking arm.
Preferably, described overload protecting mechanism is used for GREEB HEDGE MACHINE.
The present invention at least includes following beneficial effect:
1, the eccentric in the present invention and being connected with steel ball by spring between gear, steel ball is pressed in inside gear by spring,
Transmission moment of torsion, band movable eccentric wheel rotates, and this simple in construction, reliable, cost is relatively low；
2, when overload protection, steel ball is stepped down automatically, departs from draw-in groove, it is achieved overload protection function, along with clipping time
Increase parts are the most easy to wear and caloric value is low, and the cutting efficiency of GREEB HEDGE MACHINE is susceptible to impact.
Part is embodied by the further advantage of the present invention, target and feature by description below, and part also will be by the present invention
Research and practice and be understood by the person skilled in the art.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of described overload protecting mechanism；
Fig. 2 is the structural representation of described gear；
Fig. 3 is the structural representation of described eccentric；
Fig. 4 is the longitudinal sectional view of described overload protecting mechanism；
Fig. 5 is the transverse sectional view of described overload protecting mechanism；
Fig. 6 is the stress schematic diagram of described steel ball；
Fig. 7 is the explosive view of described overload protecting mechanism；
Fig. 8 is the assembling structural representation of described overload protecting mechanism and knife assembly；
Fig. 9 is the assembling structural representation of described overload protecting mechanism and body.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to description word energy
Enough implement according to this.
As shown in figs 1-9, the present invention provides a kind of overload protecting mechanism, a kind of overload protection that can be used for GREEB HEDGE MACHINE
Mechanism, overload protecting mechanism main working parts is made up of eccentric 2, gear 1, steel ball 4, spring 3, gear tabletting 5.
It is connected with steel ball 4 by spring 3 between eccentric 2 with gear 1, it is achieved overload protection function.
Concrete, described gear 1 is loop configuration, and the external gear of described gear 1 is connected with the engagement of GREEB HEDGE MACHINE drive mechanism,
Thus driven gear 1 rotates, gear 1 and eccentric 2 are two single parts, and described eccentric 2 rotates and is arranged on institute
Stating in the inner ring of gear 1, gear and eccentric can be with synchronous axial system, it is also possible to relatively rotate, described gear 1 inner ring is opened
It is provided with several draw-in grooves 11 of outwards depression, and described draw-in groove 11 axially penetrates through the inner ring wall of described gear 1, described bias
Wheel 2 offers several axis holes 21 from lateral wall to center position, and in described axis hole 21, compression is provided with spring 3, described
The outer end of spring 3 is provided with steel ball 4, and steel ball 4 can be along axis hole 21 telescopic moving, under GREEB HEDGE MACHINE normal condition, institute
Stating axis hole 21 and described draw-in groove 11 one_to_one corresponding, axis hole 21 is respectively set to the most corresponding with draw-in groove 11 in the present invention
4, described steel ball 4 is under the promotion of described spring 3, and front portion is fastened in described draw-in groove 11, and rear portion is fastened on described axle
In hole 21, steel ball 4 is pressed in inside the axis hole 21 of gear 1 by spring 3, say, that gear 1 and eccentric 2 pass through bullet
Spring 3 is connected with steel ball 4, it is achieved moment of torsion transmits, and eccentric 2 is along with gear 1 synchronous axial system.Rotation-clogging protection state, the most just
It is that eccentric 2 is braked stuck, and gear 1 is driven the moment of torsion of motor, is rotated further when blade cutting branch is stuck,
Now, radial force F that steel ball 4 is provided by gear 1, steel ball 4 overcomes spring 3 elastic force, leaves the draw-in groove on gear 1,
Namely steel ball 4 is internal mobile to axis hole 21, and compression spring 3 further, and eccentric 2 produces on gear 1 inner ring
Continuous print departs from, skids, and produces relative motion, it is achieved overload protection between gear 1 and eccentric 2, it is to avoid blocking up of motor
Turning, meanwhile, eccentric 2 and gear 1 also will not rub, and steel ball 4 is also elastic setting, is not result in steel ball 4
Wear and tear between eccentric 2 and gear 1, effectively protect parts, reduce frictional force, also do not interfere with hedgerow simultaneously
The cutting efficiency of machine.
One end of described gear 1 inner ring is provided with the stage portion 12 to inner side depression, the footpath, axial one end of described eccentric 2
Having annular boss 22 to extended, described gear 1 is set in the periphery of described eccentric 2, and described boss 22 fastens limit
Position is in described stage portion 12, and meanwhile, the described axial other end pressing of eccentric 2 is provided with gear tabletting 5, described tooth
The radius of wheel tablet 5 is more than the radius of described eccentric 2, after eccentric 2 is fastened in stage portion 12, at eccentric
The other end of 2 arranges gear tabletting 5, described eccentric 2 and described gear tabletting 5 axial restraint and connects, and concrete is permissible
It is arranged on eccentric 2 and described gear tabletting 5 fixture by eccentric 2 and described gear tabletting 5 axial restraint by running through
Connecting, now, eccentric 2 is fixed in gear 1 by gear tabletting 5, and stage portion and convex annular are passed through in eccentric 2 one end
Platform 22 is fixed on gear one end, and the eccentric other end is fixed on the gear other end by gear tabletting, thus by camshaft
In being fixed on inner ring gear.
Being respectively arranged with a cam 23 in the both ends of the surface of described eccentric 2, described cam 23 outwards runs through described gear pressure
Sheet 5, described cam 23 is connected with knife assembly by rocking arm 7, is linked with blade by eccentric, meanwhile, described eccentric 2
The centrally disposed sprocket drive spindle of axle 8, described gear shaft 8 two ends are fixed on GREEB HEDGE MACHINE body by bearing 6, it is achieved whole
The connection of mechanism and body is fixed.
In a kind of embodiment, described draw-in groove 11 is arc-shaped structure, the profile of described draw-in groove 11 and the foreign steamer of described steel ball 4
Wide identical, it is simple to steel ball 4, under the promotion of described spring 3, snaps onto in draw-in groove, linkage eccentric and gear, meanwhile,
The arcuate structure of draw-in groove 11 can provide a radial force to steel ball 4, when this radial force is more than the elastic force of spring,
Compression spring, steel ball 4, to axle medial movement, departs from draw-in groove 11, eccentric 2 and gear 1 disengaging and realizes relative motion.Its
In, the degree of depth of described draw-in groove 11 can enter less than the radius of described steel ball 4, the part being less than half to limit steel ball 4
In draw-in groove, ensure that draw-in groove 11 is supplied to the radial force of steel ball towards eccentric direction, if it exceeds the steel ball of half snaps in
In draw-in groove, this radial force will be towards gear lateral direction, it is impossible to promote steel ball 4 to move to axis hole 21 direction.Secondly,
The two ends of described draw-in groove 11 profile are provided with lead angle structure, it is simple to steel ball 4 imports in draw-in groove 11, also allow for steel ball 4 from
Draw-in groove 11 is released.
In order to realize the function that above-described embodiment describes, the set-up mode of described spring 3 is: when GREEB HEDGE MACHINE normal operating condition
Time, described spring 3 radical elasticity is applied to the radial thrust on described steel ball 4 more than described draw-in groove 11, it is ensured that steel ball 4
It is fastened in draw-in groove 21 so that eccentric 2 is synchronized with the movement with gear 1；When blade cutting branch stuck eccentric stall,
Described spring 3 radical elasticity is applied to the radial thrust on described steel ball 4 less than described draw-in groove 11, promotes steel ball 4 to axle
Hole 21 is internal mobile, further compression spring 3, and steel ball 4 leaves the draw-in groove 21 on gear 1, eccentric 2 and gear 1
Produce disengaging, skid, last relative motion, it is achieved overload protection.
From the above mentioned, the gear in the present invention and eccentric are split-type structural, and normal operating conditions leans on steel ball and spring force
Engagement, during overload, steel ball overcomes spring force, is disengaged from track, produces relative motion between gear and eccentric, it is achieved
Overload protection.Wherein, gear and eccentric are two single parts, and steel ball is pressed in inside gear by spring, transmit moment of torsion,
Band movable eccentric wheel rotates, and this simple in construction, reliable, cost is relatively low；Meanwhile, when overload protection, steel ball is stepped down automatically,
Departing from draw-in groove, it is achieved overload protection function, when blade departs from locking, the automatic spinning reduction of eccentric, along with clipping time
Increase parts are the most easy to wear and caloric value is low, and the cutting efficiency of GREEB HEDGE MACHINE is susceptible to impact.
Although embodiment of the present invention are disclosed as above, but it is not restricted in description and embodiment listed fortune
With, it can be applied to various applicable the field of the invention completely, for those skilled in the art, and can be easily
Realizing other amendment, therefore under the general concept limited without departing substantially from claim and equivalency range, the present invention does not limit
In specific details with shown here as the legend with description.
Claims (10)
1. an overload protecting mechanism, including: gear and the eccentric being arranged on inner ring gear, it is characterised in that: institute
Stating and offer several draw-in grooves on inner ring gear, the internal axially correspondence of described eccentric offers several axis holes, described axis hole
Interior compression is provided with spring, and the outer end of described spring is provided with steel ball, and described steel ball is fastened on institute under the effect of described spring
State in draw-in groove.
2. overload protecting mechanism as claimed in claim 1, it is characterised in that described draw-in groove symmetry is opened in described gear
On inner ring, and described draw-in groove axially penetrates through the inner ring wall of described gear.
3. overload protecting mechanism as claimed in claim 2, it is characterised in that described draw-in groove is arcuate structure, described card
The degree of depth of groove is less than the radius of described steel ball, and the two ends of described draw-in groove are provided with lead angle structure.
4. overload protecting mechanism as claimed in claim 3, it is characterised in that described eccentric rotates and is arranged on described tooth
The inner ring of wheel, described spring is arranged in described axis hole by the compression of described steel ball.
5. overload protecting mechanism as claimed in claim 4, it is characterised in that described axis hole and described draw-in groove one_to_one corresponding,
Described steel ball is under the compressing of described spring, and outside is fastened in described draw-in groove, and inner side is fastened in described axis hole.
6. overload protecting mechanism as claimed in claim 5, it is characterised in that the set-up mode of described spring is: when partially
During heart wheel normal operating condition, described spring radical elasticity is applied to the radial thrust on described steel ball more than described draw-in groove；When
During eccentric stall, described spring radical elasticity is applied to the radial thrust on described steel ball less than described draw-in groove.
7. overload protecting mechanism as claimed in claim 6, it is characterised in that one end of described inner ring gear is provided with ring
Shape limiting section, axial one end of described eccentric radially extends and is provided with annular boss, and described geared sleeve is located at described eccentric
Periphery, described boss is spacing on described limiting section.
8. overload protecting mechanism as claimed in claim 7, it is characterised in that described camshaft sets to other end pressing
Being equipped with gear tabletting, the radius of described gear tabletting is more than the radius of described eccentric, described eccentric and described gear tabletting
Axial restraint connects.
9. overload protecting mechanism as claimed in claim 1, it is characterised in that set respectively in the both ends of the surface of described eccentric
Being equipped with a cam, described cam outwards runs through described gear tabletting, and described cam is connected with knife assembly by rocking arm.
10. the overload protecting mechanism as described in any one in claim 1-9, it is characterised in that described overload protecting mechanism
For GREEB HEDGE MACHINE.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610464564.XA CN105909749A (en) | 2016-06-23 | 2016-06-23 | Overload protection mechanism and hedge trimmer using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610464564.XA CN105909749A (en) | 2016-06-23 | 2016-06-23 | Overload protection mechanism and hedge trimmer using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105909749A true CN105909749A (en) | 2016-08-31 |
Family
ID=56759293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610464564.XA Pending CN105909749A (en) | 2016-06-23 | 2016-06-23 | Overload protection mechanism and hedge trimmer using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105909749A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322941A (en) * | 2018-11-15 | 2019-02-12 | 常州机电职业技术学院 | Hook type bidirectional safety device |
| CN109470816A (en) * | 2017-09-07 | 2019-03-15 | 中冶长天国际工程有限责任公司 | The test sample of sintering feed detection device collects tapping equipment |
| CN109779416A (en) * | 2017-11-14 | 2019-05-21 | 新世纪发展集团温州智慧城市研究院有限公司 | A kind of intelligence padlock |
| CN110186066A (en) * | 2019-06-26 | 2019-08-30 | 国电龙源节能技术有限公司 | Boiler secondary air is precisely blown anti-clamping stagnation air door |
| CN110834306A (en) * | 2018-08-16 | 2020-02-25 | 佳铭精密工业有限公司 | Torsion joint structure |
| CN110895854A (en) * | 2019-12-16 | 2020-03-20 | 陈晓燕 | Intelligent goods storage device applied to efficient logistics service |
| CN113803383A (en) * | 2021-09-30 | 2021-12-17 | 兰州万里航空机电有限责任公司 | Overload protection anti-slip device |
| CN115569220A (en) * | 2022-09-26 | 2023-01-06 | 深圳市得利盛环保科技有限公司 | Subway carriage disinfection sprayer |
| WO2023201463A1 (en) * | 2022-04-18 | 2023-10-26 | 中国科学院深圳先进技术研究院 | Clamp and robotic arm |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109470816A (en) * | 2017-09-07 | 2019-03-15 | 中冶长天国际工程有限责任公司 | The test sample of sintering feed detection device collects tapping equipment |
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| CN110834306A (en) * | 2018-08-16 | 2020-02-25 | 佳铭精密工业有限公司 | Torsion joint structure |
| CN109322941A (en) * | 2018-11-15 | 2019-02-12 | 常州机电职业技术学院 | Hook type bidirectional safety device |
| CN110186066A (en) * | 2019-06-26 | 2019-08-30 | 国电龙源节能技术有限公司 | Boiler secondary air is precisely blown anti-clamping stagnation air door |
| CN110895854A (en) * | 2019-12-16 | 2020-03-20 | 陈晓燕 | Intelligent goods storage device applied to efficient logistics service |
| CN110895854B (en) * | 2019-12-16 | 2021-09-17 | 浙江臻远智能科技有限公司 | Intelligent goods storage device applied to efficient logistics service |
| CN113803383A (en) * | 2021-09-30 | 2021-12-17 | 兰州万里航空机电有限责任公司 | Overload protection anti-slip device |
| CN113803383B (en) * | 2021-09-30 | 2023-06-27 | 兰州万里航空机电有限责任公司 | Overload protection anti-slip device |
| WO2023201463A1 (en) * | 2022-04-18 | 2023-10-26 | 中国科学院深圳先进技术研究院 | Clamp and robotic arm |
| CN115569220A (en) * | 2022-09-26 | 2023-01-06 | 深圳市得利盛环保科技有限公司 | Subway carriage disinfection sprayer |
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Application publication date: 20160831 |