CN106605488A - Height adjusting mechanism and automatic mower thereof - Google Patents
Height adjusting mechanism and automatic mower thereof Download PDFInfo
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- CN106605488A CN106605488A CN201510697295.7A CN201510697295A CN106605488A CN 106605488 A CN106605488 A CN 106605488A CN 201510697295 A CN201510697295 A CN 201510697295A CN 106605488 A CN106605488 A CN 106605488A
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- outer tube
- inner core
- adjustment mechanism
- height adjustment
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Abstract
The invention provides a height adjusting mechanism and an automatic mower thereof. The height adjusting mechanism comprises an outer cylinder (200) and an inner core (300) in the outer cylinder, wherein the outer cylinder is connected with a body, the inner core is connected with a moving part and can be positioned in the body in a vertically movable way, inner threads (210) are arranged on the inner wall of the outer cylinder, outer threads (310) are correspondingly arranged on the outer wall of the inner core, and a turn button (100) is arranged on the top of the outer cylinder. Grooves (230) are arranged in the outer wall of the outer cylinder, and spring sheets (600) are correspondingly fixed on the body. One end of each spring sheet is fixed on the body, and the other end is a free end. When the outer cylinder is rotated with the turn button, the free ends can be embedded in the grooves for positioning. A corresponding structure of grooves with spring sheets or limiting holes with spring sheets is employed to ensure reliable shift fixing, thereby preventing shift sliding and enhancing shift feeling. Rotary radial position limiting is employed, and a position limiting structure is completely sealed in a body and may not contact with external environment. The structure is simple and the position limiting is reliable.
Description
Technical field
The present invention relates to a kind of height adjustment mechanism and its automatic mower, belong to machine-building skill
Art field.
Background technology
Automatic mower is widely used outdoor instrument, and automatic mower at present on the market leads to
Blade height regulatory function is carried often, the function is by arranging various height adjustment mechanisms come real
Existing.As patent of the document number for DE2127247 discloses a kind of height adjustment mechanism, the machine
Structure is adjusting height by the mutual rotation of internal and external threads.When blade be raised to maximum height or
When being reduced to minimum altitude, a height limit mechanism is needed to be limited to highest or lowest order
Put.As shown in the Fig. 1 in DE2127247, existing height adjustment mechanism is generally using axially
It is spacing, exactly highest and extreme lower position be respectively provided with baffle plate prevent blade from continue raise or
Reduce.In addition, document number discloses a kind of height limit machine for the patent of WO2014007694A1
Structure, arranges the top gear arranged on highest convex tendon and minimum convex tendon 360, with shell on female thread
Plate and minimum baffle plate 214 are mutually spacing, so as to the cutter of robot is limited to highest and minimum
Position.But the technical scheme disclosed in above-mentioned prior art, blade mechanisms are an exposure to body
Outside, axial height is spacing easily to cause exposure height adjustment mechanism outside by weeds, tree
The debris such as leaf, discarded plastic bag are blocked so as to which restraining position is inaccurate；In addition, existing
Altitude mixture control shift structure is unreliable, easy slide piece and shift feeling is not strong.
The content of the invention
The technical problem to be solved is for the deficiencies in the prior art, there is provided a kind of
Height adjustment mechanism and its automatic mower, increased groove with shell fragment or spacing hole and shell fragment
Counter structure is arranged, and gear fixes reliable, and the possibility and shift feeling for greatly reducing slide piece strengthens；
Meanwhile, radially spacing using rotation, position limiting structure is completely enclosed within internal body, will not with it is outer
Portion's environment contact, simple structure and spacing reliability.
The technical problem to be solved is achieved by the following technical solution：
A kind of height adjustment mechanism, for adjusting the height of the moving member being arranged on body, bag
Include outer tube and be located at its internal inner core, outer tube is connected with body, and inner core is connected simultaneously with moving member
Can position in the body with moving up and down, the inwall of outer tube is provided with female thread, outside inner core
External screw thread is correspondingly provided with wall, both screw togather correspondence, and knob is provided with the top of outer tube；It is described outer
Open up fluted on the outer wall of cylinder, correspondence is fixed with shell fragment, one end of the shell fragment on body
It is fixed on body, the other end is free end, it is during outer tube is with knob turn, described
Free end can be embedded and position in a groove.
In order that moving member is positioned relative to body is upper at various height, the setting of the shell fragment
Quantity is at least one, the quantity of groove that correspondence is opened up on the outer wall of the outer tube be it is multiple,
And each groove opens up highly identical on the outer wall of the outer tube.
Under normal circumstances, the shell fragment is compression spring.
It is spacing in order to carry out to moving member, limited block is provided with the outer wall of the outer tube, it is described
Body is provided with stop bit, and the set location and height of the stop bit is corresponding with limited block.
More specifically, the limited block has the first operating position and the second operating position, pass through
Outer tube equal angular clockwise or counterclockwise, make the limited block in the first operating position and
Switch between second operating position.
In order that inner core can be positioned in which move up and down in the body, the body is provided with installation
Seat, the mounting seat include that the local of body bottom portion upwardly extends to form circumferentially closed positioning table
And limiting stand, limiting stand is nested in inside positioning table, and the outer tube is arranged between.
The inner core is plugged in the inside of the limiting stand, and both cross sectional shapes, size correspondence set
Put.
As needed, the limiting stand is shaped as polygon, including：Triangle, square
Or pentagon；Inner core is moved up and down for convenience, and circular arc chamfering mistake is at polygonal drift angle
Cross.
Spacing for convenience, the upper of the positioning table extends further up to form protrusion along local
Stop bit.
The present invention also provides another kind of height adjustment mechanism, for adjusting the shifting being arranged on body
The height of moving part, including the inner core that outer tube is internal with which is located at, outer tube are connected with body, inner core
It is connected with moving member and can positions in the body with moving up and down, the inwall of outer tube is provided with interior
Screw thread, is correspondingly provided with external screw thread on the outer wall of inner core, and both screw togather correspondence, set at the top of outer tube
There is knob；Shell fragment is fixed with the outer wall of the outer tube, correspondence offers spacing hole on body,
During outer tube is with knob turn, the free end of the shell fragment can be embedded in spacing hole
Positioning.
The present invention a kind of automatic mower is also provided, mainly including body, be provided with body with
The cutter disc system that motor is connected and is driven by it, including height adjustment mechanism as above, institute
It is body to state body, and the moving member is motor and cutter disc system.
More specifically, the body includes base, make mutually to screw togather outer on base, is offered
The through hole that cylinder and inner core are passed through, and make cutter disc system be suspended at the lower section of base；The positioning table
Upwardly extended on the inside of through hole and formed by base.
In sum, the present invention provides a kind of height adjustment mechanism and its automatic mower, increases
Groove is arranged with the counter structure of shell fragment with shell fragment or spacing hole, and gear fixes reliable, significantly
The possibility and shift feeling for reducing slide piece strengthens；Meanwhile, using rotation spacing, the spacing knot of radial direction
Structure is completely enclosed within internal body, will not contact with external environment condition, simple structure and spacing reliability.
Below in conjunction with the accompanying drawings and specific embodiment, technical scheme is carried out in detail
It is bright.
Description of the drawings
Fig. 1 is the overall structure diagram of height adjustment mechanism embodiment of the present invention；
Fig. 2 is the external structure schematic diagram of height adjustment mechanism embodiment of the present invention；
Fig. 3 is the overall structure diagram of automatic mower of the present invention；
A direction views of the Fig. 4 for Fig. 3；
Top views of the Fig. 5 for Fig. 3.
Specific embodiment
Embodiment one
Fig. 1 is the overall structure diagram of height adjustment mechanism embodiment of the present invention；Fig. 2 is
The external structure schematic diagram of height adjustment mechanism embodiment of the present invention.Such as Fig. 1 simultaneously combines Fig. 2
Shown, the present invention provides a kind of height adjustment mechanism, for adjusting the movement being arranged on body
The height of part 500 ', while spacing effect can also be played.The mechanism mainly includes outer tube
200 and its internal inner core 300 is located at, outer tube 200 is connected with body, inner core 300 and is moved
Part is connected and can position in the body up or down.The inwall of outer tube 200 is provided with female thread
210, external screw thread 310 is correspondingly provided with the outer wall of inner core 300, both screw togather correspondence, outer tube 200
Top be provided with knob 100.
For the ease of adjusting height gear, fluted 230 on the outer wall of the outer tube 200, are opened up,
On body, correspondence is fixed with shell fragment 600, and one end of the shell fragment 600 is fixed on body, separately
One end is free end, during outer tube 200 is with 100 turn of knob, the free end energy
Enough it is embedded and positions in groove 230.In order that moving member is gone up at various height relative to body
Positioning, the setting quantity of the shell fragment 600 is at least one, in the outer wall of the outer tube 200
The quantity of the groove 230 that upper correspondence is opened up is for multiple, and each groove 230 is in the outer tube
Opening up on outer wall is highly identical, is embedded in the recessed of diverse location by the free end of shell fragment 600
In groove 230, the positioning to the moving member high and low position is realized.Under normal circumstances, in order to protect
Card shell fragment effectively can be positioned, and the shell fragment 600 adopts compression spring.
In addition, it is spacing in order to carry out to moving member, limited block is provided with the outer wall of outer tube 200
220, the body bottom portion is provided with stop bit 1201, the set location and height of the stop bit 1201
It is corresponding with limited block 220.More specifically, the limited block 220 has the first operating position
(correspondence moving member extreme higher position) and the second operating position (correspondence moving member extreme lower position), leads to
200 equal angular of outer tube clockwise or counterclockwise is crossed, and the limited block 220 is made respectively
Switch between first operating position and the second operating position of 1201 left and right sides of stop bit.More
Specifically, require that the local of the body bottom portion can also be upwards according to the correspondence of actual height
Extension forms positioning table 1200, the positioning table 1200 it is upper along local extend further up from
And form protrusion stop bit 1201.According to the actual requirements, stop bit 1201 can also be arranged on body
In other positions, but the highly corresponding of limited block 220 and stop bit 1201 need to be ensured.In order that
Knob turn can obtain corresponding extreme higher position and extreme lower position less than a circle moving member, described
Female thread should be identical with externally threaded pitch and has long enough, and in the present embodiment, pitch is
30-60mm。
In order that inner core 300 can be positioned in which move up and down in the body, the body is provided with
Mounting seat, the mounting seat include that the local of body bottom portion upwardly extends to be formed and circumferentially closed determine
Position platform 1200 and limiting stand 1210, limiting stand 1210 is nested in inside positioning table 1200, described
Outer tube 200 is arranged between；The inner core 300 is plugged in the interior of the limiting stand 1210
Portion, both cross sectional shapes, size are correspondingly arranged.Specifically, when groove 230 is opened in outer tube
During 200 sidewall bottom, for embedded or ejection of the without prejudice to shell fragment 600 in groove 230,
The positioning table 1200 is set to incomplete circumference, opens up perforate in both correspondence positions, makes
The groove 230 comes out, and facilitates shell fragment that groove 230 is embedded in through after perforate.As needed,
The limiting stand 1210 is shaped as polygon, can include：Triangle, square or five sides
Shape etc..In actual applications, the shape of limiting stand is not limited to above-mentioned shape, such as spacing
Platform 1210 can also adopt spline shape.As long as in fact, so that inner core do not rotate it is non-circular
Can adopt, those skilled in the art suitably can be selected according to actual needs.Except above-mentioned
Different shape outside, it should be pointed out that limiting stand 1210 can also adopt a variety of
Version realizing, such as using through hole, groove etc..Inner core 300 is moved up and down for convenience,
Will not be limited by the shape of positioning table 1200 and outer tube 200, at polygonal drift angle, be circle
Arc chamfered transition.With reference to the embodiment shown in Fig. 4, limiting stand 1210 is shaped as square,
Tetragonal four drift angles are circular arc chamfering.
Specifically, the course of action of above-mentioned height adjustment mechanism is such：
When user needs to adjust the height of moving member 500 ', rotary knob 100, due to rotation
Button 100 and outer tube 200 interfix, and knob 100 drives outer tube 200 to rotate together,
Now, under the position-limiting action of limiting stand 1210, inner core 300 can in this upper and lower displacement in vivo,
But can not rotate relative to body, and outer tube 200 can be rotated, but can not be relative to
Body upper and lower displacement.Due to being by female thread 210 and outer between outer tube 200 and inner core 300
What screw thread 310 was mutually screwed together, therefore, when outer tube 200 clockwise or counterclockwise when,
Inner core 300 can upper and lower displacement therewith, so as to drive moving member 500 ' relative on body,
Bottom offset.With reference to shown in Fig. 2, during knob 100 drives outer tube 200 to rotate, bullet
The free end of piece 600 is stuck in and is arranged in the groove 230 of sustained height diverse location, and it is right to realize
The adjustment of 500 ' high and low position of moving member.
In addition, being arranged radially in the limited block 220 of 200 outer wall of outer tube and being correspondingly arranged at this
In the presence of protrusion stop bit 1201 on body, during rotary knob 100, by moving member
It is limited to highest or extreme lower position.Specifically, current location as shown in Figure 4, limited block
220 abut with the opposite side for protruding stop bit 1201, it is assumed that now moving member is in highest
Position, then when knob 100 clockwise or counterclockwise less than one week after, 220 He of limited block
When the opposite side of protrusion stop bit 1201 is abutted, moving member is then in extreme lower position.Namely
Say, the present invention is to change to realize by the relative position of limited block 220 and protrusion stop bit 1201
The height of moving member 500 ' is spacing.
Embodiment two
It is pointed out that used as the distressed structure of height adjustment mechanism of the present invention, the height is adjusted
Section mechanism can also include outer tube 200 and be located at its internal inner core 300, and outer tube is connected with body,
Inner core is connected with moving member 500 ' and can position in the body with moving up and down, the inwall of outer tube
Female thread 210 is provided with, external screw thread 310 on the outer wall of inner core, is correspondingly provided with, both screws togather correspondence,
Knob 100 is provided with the top of outer tube.Difference with previous embodiment one is, in this enforcement
In example, shell fragment 600 on the outer wall of the outer tube 200, is fixed with, correspondence opens up limited on body
Position hole, during outer tube 200 is with 100 turn of knob, the free end of the shell fragment 600
Can be embedded and position in spacing hole.
Fig. 3 is the overall structure diagram of automatic mower of the present invention；Fig. 4 for Fig. 3 A to
View；Top views of the Fig. 5 for Fig. 3.Such as Fig. 3 is simultaneously combined shown in Fig. 4, Fig. 5, and the present invention is also
A kind of automatic mower is provided, described automatic mower mainly includes body 1000, in body
1000 are provided with the cutter disc system 500 for being connected with motor 400 and being driven by it.It is described to cut automatically
Careless machine also include height adjustment mechanism as above, the body be body 1000, the shifting
Moving part is motor 400 and cutter disc system 500.Specifically, motor 400 and cutter disc system 500
It is fixed on outer tube 200, on 200 inwall of outer tube, offers female thread 210；Outer tube 200
Inside is provided with inner core 300, and external screw thread 310 is offered on the outer wall of the inner core 300；External screw thread 310
It is correspondingly arranged with female thread 210 and mutually screws togather, the top of outer tube 200 is provided with knob 100.Knot
Close shown in Fig. 3, the body 1000 includes base 1100, and offering on base 1100 makes
The through hole that the outer tube 200 and inner core 300 for mutually screwing togather is passed through, and suspend cutter disc system 500
In the lower section of base 1100.
As shown in figure 5, being further opened with the external screw thread 310 opened up on the outer wall of inner core 300
Groove 330, the correspondence fixation spring tab 600 on base 1100.The setting quantity of shell fragment 600 is
At least one, but the quantity of groove 330 that correspondence is opened up on external screw thread 310 be it is multiple, often
Individual is highly mutually the same, is arranged at different positions.When shell fragment quantity is one, system
, by being embedded in different grooves, moving member correspondence is in different gear height for one shell fragment；Work as shell fragment
When quantity is multiple, the distribution angle of multiple shell fragments is corresponding with groove distributing position, i.e.,：It is mobile
During part difference gear height, multiple shell fragments are embedded in different grooves simultaneously, further can prevent
The occurrence of moving member slide piece.
Such as Fig. 5 is simultaneously combined shown in Fig. 3 and Fig. 4, and base 1100 upwardly extends shape on the inside of through hole
Into positioning table 1200, limited location block 220 is disposed radially in the outer wall of outer tube 200, it is described fixed
The upper of position platform 1200 extends further up to form protrusion stop bit 1201, its set location along local
It is corresponding with limited block 220 with height.As automatic mower belongs to existing mature equipment,
Below only to the present invention relates to improvement part structure be described, other structures are no longer gone to live in the household of one's in-laws on getting married
State.
With reference to shown in Fig. 3 to Fig. 5, the automatic mower specific work process that the present invention is provided is
It is such：During automatic mower is mowed automatically, when user is needed according to lawn
Highly adjusting during the height of cutter disc system 500, rotary knob 100, due to knob 100 and outer
Cylinder 200 interfixes, such as：Knob 100 can be firm using buckle with outer tube 200
Property connection, knob 100 drive outer tube 200 rotate together, now, inner core 300 can be in machine
Upper and lower displacement in body 1000, but can not rotate relative to body 1000, and outer tube 200
Can rotate, but can not be relative to 1000 upper and lower displacement of body, and outer tube 200 and inner core 300
Between be mutually screwed together by female thread 210 and external screw thread 310, therefore, work as outer tube
200 clockwise or counterclockwise when, inner core 300 can upper and lower displacement therewith, due to inner core
300 are rigidly connected with motor 400 and cutter disc system 500, so as to drive cutter disc system 500 relative
In 1000 upper and lower displacement of body.
As knob 100 drives inner core 300 to rotate, external screw thread 310 is rotated with, shell fragment 600
Progressively snap in each groove 330, for controlling different gears.The setting side of groove 330
There is corresponding relation between formula and gear, such as：From the point of view of in quantity, the quantity of groove is arranged
Must be more, gear interval just divides thinner；The different gear of different groove correspondences.Shell fragment
Groove 330 is deeper is less susceptible to slide piece for 600 insertions, and shift feeling is stronger.Further, since shell fragment
600 generally adopt compression spring, and itself outer wall to inner core 300 has pressure.Work as needs
When shell fragment discharges, rotary inner core 300, as groove 330 is arc in itself, rotation
When, shell fragment 600 departs from the groove by overcoming spring pressure.
It is arranged radially in the limited block 220 of 200 outer wall of outer tube and is correspondingly arranged at positioning table
In the presence of protrusion stop bit 1201 on 1200, during rotary knob 100, by cutterhead
System 500 is limited to highest or extreme lower position.Specifically, current location as shown in Figure 3,
The opposite side of limited block 220 and protrusion stop bit 1201 is abutted, it is assumed that now cutter disc system
500 be in extreme higher position, then when knob 100 clockwise or counterclockwise less than one week after, limit
When the opposite side of position block 220 and protrusion stop bit 1201 is abutted, cutter disc system 500 is then in
Extreme lower position.That is, the present invention is the phase by limited block 220 and protrusion stop bit 1201
Realize that to change in location the height of cutter disc system 500 is spacing.Due to extreme higher position and lowest order
The difference in height put is determining, to ensure a constant pitch by the pitch size of internal and external screw thread
Under the premise of, it is ensured that there is between extreme higher position and extreme lower position enough differences in height.Such as：
In the present embodiment, the design parameter of pitch is 40mm, therefore, adjustable height is also 40mm
Left and right.
In sum, the present invention fixes reliable by increased groove and elastic piece structure, gear,
The possibility and shift feeling for greatly reducing slide piece strengthens；Meanwhile, limit radially spacing using rotation
Bit architecture is completely enclosed within internal body, will not contact with external environment condition, simple structure and spacing
It is reliable.
Claims (11)
1. a kind of height adjustment mechanism, for adjusting the height of the moving member being arranged on body,
Characterized in that, including outer tube (200) and the inner core (300) being located inside which, outer tube and sheet
Body phase connects, and inner core is connected with moving member (500 ') and can position in the body with moving up and down,
The inwall of outer tube is provided with female thread (210), and external screw thread (310) is correspondingly provided with the outer wall of inner core,
Both screw togather correspondence, and knob (100) is provided with the top of outer tube；Open up on the outer wall of the outer tube
Fluted (230), on body, correspondence is fixed with shell fragment (600), and one end of the shell fragment is solid
Be scheduled on body, the other end is free end, during outer tube is with knob turn, it is described from
Can be embedded by end and be positioned in a groove.
2. height adjustment mechanism as claimed in claim 1, it is characterised in that the shell fragment
(600) setting quantity is at least one, the groove that correspondence is opened up on the outer wall of the outer tube
(230) quantity is for multiple, and each groove opens up height phase on the outer wall of the outer tube
Together.
3. height adjustment mechanism as claimed in claim 2, it is characterised in that the shell fragment
(600) it is compression spring.
4. height adjustment mechanism as claimed in claim 1, it is characterised in that in the outer tube
(200) outer wall is provided with limited block (220), and the body is provided with stop bit (1201), institute
The set location and height for stating stop bit is corresponding with limited block.
5. height adjustment mechanism as claimed in claim 4, it is characterised in that the limited block
(220) with the first operating position and the second operating position, by clockwise or counterclockwise
Outer tube (200) equal angular, makes the limited block in the first operating position and the second operating position
Between switch.
6. height adjustment mechanism as claimed in claim 5, it is characterised in that on the body
Mounting seat is provided with, the mounting seat includes that the local of body bottom portion upwardly extends to form circumferentially closed
Positioning table (1200) and limiting stand (1210), limiting stand is nested in inside positioning table, described
Outer tube (200) is arranged between；
The inner core (300) is plugged in the inside of the limiting stand (1210), both section shapes
Shape, size are correspondingly arranged.
7. height adjustment mechanism as claimed in claim 6, it is characterised in that the limiting stand
(1210) be shaped as is circular arc chamfering transition at polygon, and polygonal each drift angle.
8. height adjustment mechanism as claimed in claim 6, it is characterised in that the positioning table
(1200) upper edge local extends further up to form protrusion stop bit (1201).
9. a kind of height adjustment mechanism, for adjusting the height of the moving member being arranged on body,
Characterized in that, including outer tube (200) and the inner core (300) being located inside which, outer tube and sheet
Body phase connects, and inner core is connected with moving member (500 ') and can position in the body with moving up and down,
The inwall of outer tube is provided with female thread (210), and external screw thread (310) is correspondingly provided with the outer wall of inner core,
Both screw togather correspondence, and knob (100) is provided with the top of outer tube；It is fixed on the outer wall of the outer tube
Have shell fragment (600), on body correspondence offer spacing hole, outer tube with knob turn mistake
Cheng Zhong, the free end of the shell fragment can be embedded and position in spacing hole.
10. a kind of automatic mower, mainly including body (1000), is provided with body and electricity
Machine (400) is connected and the cutter disc system (500) that is driven by it, it is characterised in that also include as
Height adjustment mechanism described in any one of claim 1-9, the body be body, the shifting
Moving part is motor and cutter disc system.
11. automatic mowers as claimed in claim 10, it is characterised in that the body
(1000) base (1200) is included, the outer tube (200) for making mutually to screw togather on base, is offered
The through hole passed through with inner core (300), and make cutter disc system (500) be suspended at the lower section of base；
The positioning table (1200) is upwardly extended on the inside of through hole by base and is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510697295.7A CN106605488B (en) | 2015-10-23 | 2015-10-23 | Height adjustment mechanism and its automatic mower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510697295.7A CN106605488B (en) | 2015-10-23 | 2015-10-23 | Height adjustment mechanism and its automatic mower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106605488A true CN106605488A (en) | 2017-05-03 |
| CN106605488B CN106605488B (en) | 2019-10-22 |
Family
ID=58613267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510697295.7A Active CN106605488B (en) | 2015-10-23 | 2015-10-23 | Height adjustment mechanism and its automatic mower |
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| Country | Link |
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| CN (1) | CN106605488B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109618646A (en) * | 2019-02-22 | 2019-04-16 | 浙江白马实业有限公司 | A kind of cutterhead lifting structure and the grass trimmer with the structure |
| WO2021098867A1 (en) * | 2019-11-22 | 2021-05-27 | 上海山科机器人有限公司 | Autonomous operation device |
| CN113207409A (en) * | 2019-12-20 | 2021-08-06 | 罗伯特·博世有限公司 | Grass cutter |
| CN113207409B (en) * | 2019-12-20 | 2024-07-09 | 罗伯特·博世有限公司 | Mower |
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| CN109618646A (en) * | 2019-02-22 | 2019-04-16 | 浙江白马实业有限公司 | A kind of cutterhead lifting structure and the grass trimmer with the structure |
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| CN113207409B (en) * | 2019-12-20 | 2024-07-09 | 罗伯特·博世有限公司 | Mower |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106605488B (en) | 2019-10-22 |
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