CN113475216A - Grass cutter - Google Patents
Grass cutter Download PDFInfo
- Publication number
- CN113475216A CN113475216A CN202110870595.6A CN202110870595A CN113475216A CN 113475216 A CN113475216 A CN 113475216A CN 202110870595 A CN202110870595 A CN 202110870595A CN 113475216 A CN113475216 A CN 113475216A
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- China
- Prior art keywords
- driving shaft
- shaft
- blade
- mower
- driving
- 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.)
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- 244000025254 Cannabis sativa Species 0.000 title description 2
- 230000008878 coupling Effects 0.000 claims abstract description 47
- 238000010168 coupling process Methods 0.000 claims abstract description 47
- 238000005859 coupling reaction Methods 0.000 claims abstract description 47
- 230000000670 limiting effect Effects 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 abstract description 12
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
- A01D34/67—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator
- A01D34/68—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator with motor driven cutters or wheels
- A01D34/685—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis hand-guided by a walking operator with motor driven cutters or wheels with two or more cutters
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D34/00—Mowers; Mowing apparatus of harvesters
- A01D34/01—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus
- A01D34/412—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters
- A01D34/63—Mowers; Mowing apparatus of harvesters characterised by features relating to the type of cutting apparatus having rotating cutters having cutters rotating about a vertical axis
- A01D34/82—Other details
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Harvester Elements (AREA)
Abstract
The invention provides a mower, belongs to the technical field of garden tools, and can protect an output mechanism of the mower and prevent the mower from being damaged in collision. Install at least one blade on the lawn mower, at least one blade passes through the elastic coupling system and installs on the lawn mower, and the elastic coupling system includes: first drive shaft, second drive shaft and elastic component. The second driving shaft and the first driving shaft are coaxially arranged; the elastic piece is sleeved outside the first driving shaft and the second driving shaft, one end of the elastic piece is connected with the first driving shaft, and the other end of the elastic piece is connected with the second driving shaft; the elastic piece transmits the circumferential driving force of the first driving shaft to the second driving shaft, and the relative position of the first driving shaft and the second driving shaft can be adjusted according to the external force applied to the second driving shaft. The elastic piece capable of elastically deforming is arranged in the elastic coupling system, so that the transmission of the collision resilience force of the blade to a mechanical system connected with the coupling system is effectively weakened and even prevented, and a protection effect is achieved.
Description
Technical Field
The invention relates to the technical field of garden tools, in particular to a mower with an elastic coupling system.
Background
The lawn mower is common mowing equipment, trims lawns, vegetations and the like through the blade arranged at the bottom of the lawn mower, is simple and convenient to operate, has high working efficiency, and is widely applied to lawn trimming work of green and shaded fields and the like of a sanitation grassland. The blade drive shaft is subjected to a large force when the mower is started and to an opposite force when the mower is stopped. This can cause some damage to the drive train of the mower. When the mower is used for mowing, sometimes the blade rotating at a high speed collides with a hard object, such as a stone or an iron pipe, the blade violently collides with the hard object, and strong collision resilience often damages the output structure of the blade, so that the machine cannot be used continuously.
The blade of the known mower in the prior art is arranged on the shaft, the blade is connected with the shaft through a key, the key is made of soft materials, the key is cut off when being subjected to strong shearing force when the blade is locked, the blade loses the connection with the shaft and slips, and the shearing force cannot be transmitted to the motor through the key driving shaft. However, the key driving shaft needs to be replaced again after being cut off, the machine side can recover to normal operation, and the actual operation is complex, so that the parts of the transmission structure can be effectively protected by adopting the structure, but the structure needs to replace damaged parts and needs professionals to install blades, and certain inconvenience and trouble are brought to users. It is therefore desirable to design a mower with a flexible coupling system to solve the above problems.
Disclosure of Invention
In view of the above disadvantages of the prior art, it is an object of the present invention to provide a lawn mower capable of improving the problem that the blade rotating at a high speed of the conventional lawn mower damages the output structure of the output system due to the repulsive force of the violent impact when the blade collides with a hard object, by providing a resilient coupling system on the output system.
To achieve the above and other related objects, the present invention provides a mower having at least one blade mounted thereon, the at least one blade being mounted to the mower via a resilient coupling system; the elastic coupling system comprises: first drive shaft, second drive shaft and elastic component. The second driving shaft and the first driving shaft are coaxially arranged; the elastic piece is sleeved outside the first driving shaft and the second driving shaft, one end of the elastic piece is connected with the first driving shaft, and the other end of the elastic piece is connected with the second driving shaft; the elastic piece transmits the circumferential driving force of the first driving shaft to the second driving shaft, and the relative position of the first driving shaft and the second driving shaft can be adjusted according to the external force applied to the second driving shaft.
In one example of the present invention, the elastic member is a spring.
In one example of the present invention, the spring has two ends provided with hanging lugs, and the hanging lugs at the two ends are respectively hung on the first driving shaft and the second driving shaft.
In one example of the present invention, the shaft body of the first drive shaft and/or the second drive shaft is provided with a through hole, and the through hole is radially arranged on the first drive shaft and/or the second drive shaft.
In an example of the present invention, the first driving shaft and the second driving shaft are provided with a connecting hole on their facing end surfaces, and the two connecting holes are coaxially arranged.
In an example of the present invention, a connecting pin is further disposed between the first driving shaft and the second driving shaft, and both ends of the connecting pin are respectively inserted into the connecting holes of the first driving shaft and the second driving shaft.
In one example of the invention, the second drive shaft is connected to the blade by a fixed mount, and the second drive shaft passes through the fixed mount and the blade and secures the fixed mount and the blade to the second drive shaft by a nut.
In an example of the present invention, the fixing base is provided with a shaft hole matching with the second driving shaft, and the bottom of the fixing base is provided with a plurality of limiting shafts.
In an example of the present invention, the plurality of limiting shafts on the fixing base may correspondingly extend into the limiting holes on the blade.
In an example of the invention, the second driving shaft is movably connected in the shaft hole of the fixed seat through a key.
In one example of the invention, an end of the first drive shaft facing away from the second drive shaft is coaxially connected to an output shaft of the motor.
In one example of the present invention, the first drive shaft is an output shaft of a motor.
In one example of the invention, at least one blade in the mower is connected by a resilient coupling system to a driven gear of the power assembly, the driven gear meshing with a drive gear connected to the motor.
The output mechanism of the mower is provided with an elastic coupling system to provide protection when the output mechanism works. The elastic coupling system is used for respectively connecting the power assembly and the blade in the mower by using the first driving shaft and the second driving shaft, and connecting the first driving shaft and the second driving shaft through the elastic piece, so that the power output by the motor is transmitted to the blade through the elastic coupling system, and the blade is controlled by the motor to rotate. The mower provided with the elastic coupling system is used for mowing, when the blade rotating at a high speed collides with a hard object, the strong collision resilience enables the resistance of the second driving shaft to be larger than the driving force of the first driving shaft, thereby enabling the blade to stop rotating instantly and even possibly reversely rotate in a short time, at the moment, the elastic part elastically deforms along the circumferential direction, and can absorb the mechanical kinetic energy conducted to the second driving shaft by the blade, therefore, the impact resilience of the blade can be effectively weakened and can be separated to be transmitted to the first driving shaft, thereby effectively protecting a mechanical system in a power assembly connected with the first driving shaft, and playing a role in protecting the blade from being blocked and damaged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a three-dimensional view of a lawn mower according to an embodiment of the present invention;
FIG. 2 is a three-dimensional cross-sectional view of an output mechanism of a lawnmower according to an embodiment of the present invention;
FIG. 3 is a three-dimensional view of an output mechanism in accordance with an embodiment of the present invention;
FIG. 4 is another cross-sectional view of an output structure in accordance with an embodiment of the present invention;
FIG. 5 is an exploded view of the flexible coupling system in accordance with one embodiment of the present invention;
FIG. 6 is another exploded view of the flexible coupling system in accordance with one embodiment of the present invention;
FIG. 7 is an exploded view of the connection of the flexible coupling system to the blade in accordance with one embodiment of the present invention;
FIG. 8 is a cross-sectional view of a flexible coupling system installed in an output mechanism in accordance with an embodiment of the present invention;
FIG. 9 is a schematic view of the operation of the flexible coupling system in accordance with an embodiment of the present invention;
description of the element reference numerals
100. A mower; 200. an output mechanism; 300. a power assembly; 400. a flexible coupling system; 500. a blade; 600. a bearing; 700. an obstacle; 800. a drive shaft centerline; 110. a support frame; 120. a protective shell; 310. a motor; 320. a driving gear; 330. a driven gear; 410. a first drive shaft; 411. a first through hole; 412. a first bolt; 413. a first nut; 414. a first connection hole; 415. a third connection hole; 420. a second drive shaft; 421. a second through hole; 422. a second bolt; 423. a second nut; 424. a second connection hole; 430. an elastic member; 431. a spring; 432. a first suspension loop; 433. a second suspension loop; 440. a connecting pin; 450. a fixed seat; 451. a limiting shaft; 452. a circular truncated cone; 453. a connecting bond; 460. a flange plate; 461. a first screw; 462. a first gasket; 463. a second screw; 470. a connecting seat; 480. a third nut; 481. a second gasket; 510. a limiting hole; 610. a first bearing; 620. a second bearing.
Detailed Description
Referring to fig. 1 to 9, embodiments of the present invention are described below with specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. It is also to be understood that the terminology used in the examples is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the respective manufacturers.
When numerical ranges are given in the examples, it is understood that both endpoints of each of the numerical ranges and any value therebetween can be selected unless the invention otherwise indicated. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and the description of the present invention, and any methods, apparatuses, and materials similar or equivalent to those described in the examples of the present invention may be used to practice the present invention.
Referring to fig. 1 to 9, the present invention provides a mower with a flexible coupling system to improve the structure of the existing coupling system.
Referring to fig. 1 to 4, the present invention further provides a lawn mower 100, wherein at least one blade 500 is mounted on the lawn mower 100, and the at least one blade 500 is mounted in the lawn mower 100 through an elastic coupling system 400.
As shown in fig. 1 to 4, the elastic coupling system 400 of the lawn mower 100 of the present invention is disposed in the output mechanism 200, and the power module 300, the elastic coupling system 400, the blade 500 and other connecting components such as the bearing 600, the fixing seat 450, the connecting seat 470, etc. are disposed in the output mechanism 200, wherein the power module 300 is fixed on the supporting frame 110 of the lawn mower 100, the elastic coupling system 400 is connected to the power module 300 and disposed in the protective housing 120 of the lawn mower 100, and the first driving shaft 410 and the second driving shaft 420 of the elastic coupling system 400 are rotatably mounted in the housing 120 and connected to the blade 500, so as to achieve the function of connecting and communicating the power module 300 and the blade 500, and transmit the power output by the power module 300 to the blade 500, thereby controlling the rotation of the blade 500.
Referring to fig. 5, 6 and 8, the elastic coupling system 400 includes a first driving shaft 410, a second driving shaft 420 and an elastic member 430. The first driving shaft 410 and the second driving shaft 420 are coaxially disposed and connected to each other by an elastic member 430. The first drive shaft 410 is connected at one end to the power assembly 300 and at the other end to a second drive shaft 420, the end of the second drive shaft 420 facing away from the first drive shaft 410 being connected to the blade 500. The elastic member 430 is concentrically disposed at a connection position of the first driving shaft 410 and the second driving shaft 420, is sleeved outside the first driving shaft 410 and the second driving shaft 420, and is respectively connected with the first driving shaft 410 and the second driving shaft 420, so that the first driving shaft 410 and the second driving shaft 420 transmit circumferential driving force through the elastic member 430, and the first driving shaft 410 drives the second driving shaft 420 to coaxially rotate. Furthermore, the elastic member 430 may be made of a relatively tough elastic material, such as a rubber product with a central symmetrical shape, a spring, etc., and may be elastically deformed in a circumferential direction of the center line 800 of the driving shaft, and may be elastically twisted or rotated to accumulate force for use, thereby absorbing a certain amount of mechanical kinetic energy, so that when the lawn mower 100 is started, the force transmitted from the driving shaft to the blade 500 is gradually increased, and when the lawn mower 100 is stopped, the force transmitted from the blade 500 to the driving shaft 410 is gradually decreased, which means that the relative position between the first driving shaft 410 and the second driving shaft 420 is changed. The elastic member 430 can adjust the relative position of the first driving shaft 410 and the second driving shaft 420 according to the magnitude of the external force applied to the second driving shaft 420. When the second driving shaft 420 is subjected to a large external force, the external force is greater than the elastic force of the elastic member 430, so that the second driving shaft 420 moves relative to the first driving shaft 410, and the elastic member 430 is elastically deformed more greatly until the external force is balanced. When the external force is reduced, the elastic force of the elastic member 430 on the second driving shaft 420 is greater than the external force, which drives the second driving shaft 420 to reduce the relative displacement with the first driving shaft 410, so as to reduce the elastic force. For example, when the blade 500 collides with a hard object, the elastic member 430 may effectively weaken or even block the transmission of the repulsive force generated by the blade 500 colliding with the hard obstacle 700 from the second driving shaft 420 to the first driving shaft 410, effectively protecting the mechanical systems, such as the motor 310, the driving gear 320, the driven gear 330, etc., in the power assembly 300 connected to the elastic coupling system 400.
Also, in one example of the mower of the present invention, the mower 100 can be a single blade mower, and one blade 500 of the mower 100 can be directly connected to the motor 310 via the flexible coupling system 400. In an embodiment of the present example, an end of the first driving shaft 410 facing away from the second driving shaft 420 in the elastic coupling system 400 is coaxially connected to an output shaft of the motor 310; in another embodiment of the present example, the first driving shaft 410 of the elastic coupling system 400 is an output shaft of the motor 310.
Referring to fig. 2 to 4, in another example of the lawn mower of the present invention, the lawn mower 100 may be a multi-blade lawn mower, the blades 500 of the lawn mower 100 may be connected to the corresponding driven gears 330 of the power assembly 300 through the elastic coupling system 400, the driven gears 330 may be engaged with the driving gear 310 connected to the motor 310, when the motor 310 drives the driving gear 310 to rotate, the driving gear 320 engages with the driven gears 330 to rotate in a reverse direction, and the driven gears 330 further transmit power to the blades 500 through the elastic coupling system 400, so as to control the blades 500 to rotate.
Referring to fig. 5, 6 and 8, in an example of the present invention, the elastic member 430 is a spring 431, and the spring 431 is provided with a first hanging lug 432 and a second hanging lug 433 near both ends of the first driving shaft 410 and the second driving shaft 420, respectively. The spring 431 is connected to the first and second driving shafts 410 and 420 through first and second lugs 432 and 433, respectively.
Referring to fig. 5, 6 and 8, in this example, the first lug 432 and the second lug 433 of the spring 431 are fixedly connected to the first driving shaft 410 and the second driving shaft 420 by bolts, respectively. A first through hole 411 is formed in the shaft body of the first driving shaft 410, and the first through hole 411 is radially formed in the first driving shaft 410; the second driving shaft 420 is provided with a second through hole 421 on the shaft body, and the second through hole 421 is radially provided on the second driving shaft 420. The spring 43 is sleeved in the outer side 1 of the first driving shaft 410 and the second driving shaft 420, and at this time, the first hanging lug 432 of the spring 431 is located on the outer side of the first driving shaft 410 and aligned with the first through hole 411, and the second hanging lug 433 is located on the outer side of the second driving shaft 420 and aligned with the second through hole 421. After the first and second lugs 432 and 433 of the spring 431 are aligned with the first and second through holes 411 and 421 respectively, a first bolt 412 is arranged on the outer side of the first driving shaft 410 and sequentially passes through the first hanging lug 432 and the first through hole 411, the first hanging lug 432 and the spring 431 are fixed on the first driving shaft 410 together through a first nut 413 locking end, a second bolt 422 is also arranged on the outer side of the second driving shaft 420 and sequentially passes through the second hanging lug 433 and the second through hole 421, the second hanging lug 433 and the spring 431 are fixed on the second driving shaft 420 together through a second nut 423 locking end, the above arrangement enables the interconnection of the spring 431 with the first and second drive shafts 410 and 420, so that the first driving shaft 410 and the second driving shaft 420 can transmit circumferential driving force through the spring 431, and the effect that the first driving shaft 410 drives the second driving shaft 420 to rotate is realized.
Also, in this example, the first drive shaft 410 and the second drive shaft 420 are provided with a first connection hole 414 and a second connection hole 424, respectively, on end surfaces connected in opposition, and the above-described first connection hole 414 and second connection hole 424 are provided coaxially on the connection end surfaces of the first drive shaft 410 and the second drive shaft 420 in the direction of the drive shaft center line 800. And a connecting pin 440 is further disposed between the first driving shaft 410 and the second driving shaft 420, when the first driving shaft 410 and the second driving shaft 420 relatively extend into the spring 431 along the direction of the driving shaft center line 800 and contact each other at the connecting ends, the connecting pin 440 is inserted into the first connecting hole 414 and the second connecting hole 424 which are relatively disposed along the direction of the driving shaft center line 800, two ends of the connecting pin 440 are respectively disposed in the first connecting hole 414 and the second connecting hole 424 to ensure that the first driving shaft 410 coaxially rotates along the direction of the driving shaft center line 800 when driving the second driving shaft 420 to rotate, and the outer diameter of the connecting pin 440 is smaller than the outer diameter of the first connecting hole and the second connecting hole, so that when the first driving shaft 410 rotates, the connecting pin 440 cannot transmit the driving force.
Referring to fig. 9, in the output mechanism 200 equipped with the spring 431, when the blade 500 rotating at a high speed collides violently with a hard obstacle 700, the blade 500 stops rotating instantly with a strong repulsive force and may rotate reversely for a short time, the strong collision generates a strong collision repulsive force acting on the blade 500 and is transmitted from the blade 500 to the elastic coupling system 400, and since the spring 431 provided between the first driving shaft 410 and the second driving shaft 420 in the elastic coupling system 400 is a flexible material, which is an elastic material, it can be deformed in the circumferential direction of the driving shafts by accumulating force through plastic twisting or rotation and can absorb mechanical kinetic energy transmitted from the blade 500 to the second driving shaft 420, so that the transmission of the collision repulsive force of the blade 500 to the first driving shaft 410 can be effectively weakened and blocked, and the mechanical system in the power assembly 300 connected to the first driving shaft 410 can be effectively protected, the protection effect of preventing the locked rotor from being damaged is achieved.
Referring to fig. 5 and 8, in an example of the present invention, the first driving shaft 410 and the second driving shaft 420 are respectively provided with bearings 600 on the shaft body near one end of the connecting power assembly 300 and the blade 500, wherein the first driving shaft 410 is provided with a first bearing 610 on the shaft body near one end of the connecting power assembly 300, and the first bearing 610 is coaxially arranged with the first driving shaft 410 and fixed on the connecting base 470; the second driving shaft 420 is provided with a second bearing 620 on the shaft body near one end of the connecting blade 500, and the second bearing 620 is coaxially arranged with the second driving shaft 420 and is arranged on a partition plate extending inwards at the bottom of the protective shell 120 of the mower 100.
Referring to fig. 2 and 4, in an example of the present invention, the elastic coupling system 400 may be directly connected to the motor 310 of the power assembly 300, and directly transmit power output by the motor 310 to the blade 500, so as to control the rotation of the blade 500; in another example of the present invention, the elastic coupling system 400 may be indirectly connected to the motor 310 by being connected to the driven gear 330, and the motor 310 transmits power to the elastic coupling system 400 and the blade 500 through the driving gear 320 and the driven gear 330 engaged with the driving gear to control the rotation of the blade 500.
Referring to fig. 5 and 8, in an example of the present invention, the first driving shaft 410 is connected to the driven gear 330 through a flange 460, the first driving shaft 410, the flange 460 and the driven gear 330 are coaxially disposed, an end of the first driving shaft 410 is axially connected to the flange 460, and the flange 460 is connected to the driven gear 330, such that the driven gear 330 rotates to drive the flange 460 to rotate, and further, the power is transmitted to the first driving shaft 410 connected to the flange 460 to drive the first driving shaft 410 to rotate.
Referring to fig. 5 and 8, in this example, the flange 460 is disposed at the bottom of the driven gear 330 and is fixedly connected to the driven gear 330 by bolts, and the first driving shaft 410 is disposed on the flange 460 by bolts through the flange 460. The end of the first driving shaft 410 connected to the driven gear 330 is provided with a third connecting hole 415, the center of the flange 460 is provided with a circular platform body matching with the shaft hole of the driven gear 330, and the center of the circular platform body is provided with a shaft hole matching with the first driving shaft 410. The end of the first driving shaft 410 is inserted through the shaft hole of the flange plate 460, and the first washer 462 located at the bottom of the screw head is fixed to the end of the first driving shaft 410 by screwing the first screw 461 into the third coupling hole 415, and since the size of the first washer 462 is larger than that of the shaft hole of the flange plate 460, the first washer 462 can be placed on the table of the circular table of the flange plate 460, and the first driving shaft 410 fixedly coupled to the first washer 462 can be hung on the flange plate 460. Meanwhile, the driven gear 330 and the flange plate 460 are also provided with a plurality of threaded holes distributed along the radial direction, the plurality of threaded holes on the driven gear 330 and the plurality of threaded holes on the flange plate 460 are corresponding to each other in the radial direction of the shaft body and have the same straight line, the driven gear 330 and the flange plate 460 are connected through a plurality of second screws 463, and the screws of the plurality of second screws 463 penetrate through the plurality of threaded holes on the driven gear 330 and are respectively fixed in the corresponding threaded holes on the flange plate 460, so that the flange plate 460 is fixedly connected to the driven gear 330 and can rotate along with the driven gear 330.
In this example, the first drive shaft 410 is keyed to the axial bore of the flange 460 to achieve synchronous rotation of the first drive shaft 410 and the flange 460. Specifically, the first driving shaft 410 is provided with a key slot on the shaft body near one end of the driven gear 330, and the key slot is axially arranged on the first driving shaft 410, wherein in one embodiment of the present example, a key matched with the key slot on the first driving shaft 410 is arranged in the shaft hole of the flange plate 460, and when the first driving shaft 410 passes through the shaft hole of the flange plate 460, the key in the shaft hole of the flange plate 460 is inserted into the key slot of the first driving shaft 410, so that the first driving shaft 410 can synchronously rotate along with the flange plate 460; in another embodiment of this example, the shaft hole of the flange 460 is also provided with a key slot, and when the first drive shaft 410 is inserted through the shaft hole of the flange 460, the key slot of the first drive shaft 410 may be aligned with the key slot of the shaft hole of the flange 460, and the key may be positioned to match the key slot of the shaft hole of the first drive shaft 410 and the flange 460, so that the first drive shaft 410 may rotate synchronously with the flange 460.
In this example, a connecting seat 470 is further disposed at the bottom of the flange 460, and is coaxial with the flange 460, the connecting seat 470 can be fixed to the inward protruding baffle of the protective casing 120, and a bearing 600 disposed coaxially with the first driving shaft 410 can also be fixed to the connecting seat 470, and the connecting seat 470 can be disposed to position the first driving shaft 410, the bearing 600 disposed coaxially with the first driving shaft 410, and the rotation axis direction of the flange 460.
Referring to fig. 5, 7 and 8, in an example of the present invention, the second driving shaft 420 is connected to the blade 500 through a fixing base 450, and the second driving shaft 420, the fixing base 450 and the blade 500 are coaxially arranged along a driving shaft center line 800, wherein the second driving shaft 420 sequentially passes through shaft holes of the fixing base 450, the blade 500 and the second spacer 481, and the fixing base 450, the blade 500 and the second spacer 481 are fixed on the second driving shaft 420 by locking a distal end of the second driving shaft 420 with a third nut 480. Moreover, the blade 500 is connected to the fixing base 450, and the end of the second driving shaft 420 is coaxially connected to the fixing base 450, so that the second driving shaft 450 rotates to drive the fixing base 450 to rotate, and further, the power is transmitted to the blade 500 connected to the fixing base 450, so as to drive the blade 500 to rotate.
Referring to fig. 7, in the present embodiment, a protruding circular truncated cone 452 is disposed on the top of the fixing base 450, the circular truncated cone 452 is provided with a shaft hole matching with the second driving shaft 420, and the shaft hole of the fixing base 450 extends from the top of the circular truncated cone 452 to the bottom of the fixing base 450, so as to effectively increase the length of the shaft hole of the fixing base 450; the bottom of the fixing base 450 is provided with a plurality of limiting shafts 451, the limiting shafts 451 are distributed at the bottom of the fixing base 450 along the radial central symmetry, the limiting shafts 451 extend to one side of the blade 500 along the direction parallel to the central line 800 of the driving shaft and extend into the corresponding limiting holes 510 on the blade 500, and are matched with the second gasket 481 and the third nut 480 at the bottom of the blade 500 to fix the blade 500 on the fixing base 450 and enable the blade 500 to rotate synchronously with the fixing base 450.
Referring to fig. 7, in this example, the second driving shaft 420 is disposed in the shaft hole of the fixing base 450 by a key connection manner, so as to achieve synchronous rotation of the second driving shaft 420 and the fixing base 450. Specifically, the second driving shaft 420 is provided with a key groove on the shaft body near one end of the fixed seat 450, the key groove is axially arranged on the second driving shaft 420, wherein in an embodiment of the present example, a connecting key 453 matched with the key groove on the second driving shaft 420 is arranged in the circular platform hole of the fixed seat 450, and when the second driving shaft 420 passes through the shaft hole of the fixed seat 450, the connecting key 453 in the shaft hole of the fixed seat 450 is inserted into the key groove of the second driving shaft 420, so that the fixed seat 450 can synchronously rotate along with the second driving shaft 420.
The output mechanism of the mower is provided with an elastic coupling system to provide protection when the output mechanism works. The elastic coupling system is used for respectively connecting the power assembly and the blade in the mower by using the first driving shaft and the second driving shaft, and connecting the first driving shaft and the second driving shaft through the elastic piece, so that the power output by the motor is transmitted to the blade through the elastic coupling system, and the blade is controlled by the motor to rotate. The mower provided with the elastic coupling system is used for mowing, when the blade rotating at a high speed collides with a hard object, the strong collision resilience enables the resistance of the second driving shaft to be larger than the driving force of the first driving shaft, thereby enabling the blade to stop rotating instantly and even possibly reversely rotate in a short time, at the moment, the elastic part elastically deforms along the circumferential direction, and can absorb the mechanical kinetic energy conducted to the second driving shaft by the blade, therefore, the impact resilience of the blade can be effectively weakened and can be separated to be transmitted to the first driving shaft, thereby effectively protecting a mechanical system in a power assembly connected with the first driving shaft, and playing a role in protecting the blade from being blocked and damaged.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (13)
1. A lawnmower having at least one blade mounted thereon, at least one of the blades being mounted on the mower by a resilient coupling system; the elastic coupling system comprises:
a first drive shaft;
a second drive shaft disposed coaxially with the first drive shaft;
the elastic piece is sleeved outside the first driving shaft and the second driving shaft, one end of the elastic piece is connected with the first driving shaft, and the other end of the elastic piece is connected with the second driving shaft;
the elastic piece transmits the circumferential driving force of the first driving shaft to the second driving shaft, and the relative position of the first driving shaft and the second driving shaft can be adjusted according to the magnitude of external force applied to the second driving shaft.
2. The mower of claim 1 wherein the resilient member is a spring.
3. The mower according to claim 2, wherein the spring is provided with lugs at two ends, and the lugs at two ends are respectively hung on the first driving shaft and the second driving shaft.
4. A lawnmower according to claim 3, wherein the shaft body of the first and/or second drive shaft is provided with a through hole, the through hole being provided radially in the first and/or second drive shaft.
5. The mower of claim 1, wherein each of the opposing end surfaces of the first and second drive shafts has a connecting hole, and wherein the two connecting holes are coaxially disposed.
6. The mower according to claim 5, wherein a connecting pin is further provided between said first and second drive shafts, and both ends of said connecting pin are respectively inserted into said connecting holes of said first and second drive shafts.
7. The mower of claim 1 wherein the second drive shaft is connected to the blade by a mount, the second drive shaft passing through the mount and the blade and securing the mount and the blade to the second drive shaft by a nut.
8. The mower of claim 7, wherein the fixed base is provided with a shaft hole matched with the second driving shaft, and the bottom of the fixed base is provided with a plurality of limiting shafts.
9. The mower of claim 8, wherein the plurality of limiting shafts on the holder correspondingly extend into the limiting holes on the blade.
10. The mower of claim 8 wherein the second drive shaft is keyed to the shaft hole of the holder.
11. The lawnmower of claim 1, wherein the first drive shaft is coaxially connected to the output shaft of the motor.
12. The lawnmower of claim 1, wherein the first drive shaft is an output shaft of a motor.
13. A lawnmower as claimed in claim 1, wherein at least one blade in the lawnmower is connected by the resilient coupling system to a driven gear of the power assembly, the driven gear meshing with a drive gear connected to the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110870595.6A CN113475216A (en) | 2021-07-30 | 2021-07-30 | Grass cutter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110870595.6A CN113475216A (en) | 2021-07-30 | 2021-07-30 | Grass cutter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113475216A true CN113475216A (en) | 2021-10-08 |
Family
ID=77944754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110870595.6A Pending CN113475216A (en) | 2021-07-30 | 2021-07-30 | Grass cutter |
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|---|---|
| CN (1) | CN113475216A (en) |
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Application publication date: 20211008 |