Wheel type liftable cutter head mower
Technical Field
The utility model relates to the field of agricultural machinery, concretely relates to wheeled liftable blade disc lawn mower.
Background
A lawn mower is a most common type of mowing equipment in the prior art, and is also called a weeding machine, a lawn mower, a lawn trimmer and the like. The mower is a mechanical tool for trimming lawn and vegetation, and is composed of cutter head, engine, walking wheels, walking mechanism, blades, handrail and control unit. The cutter head is arranged on the travelling wheel, the engine is arranged on the cutter head, the blade is arranged on the output shaft of the engine, the blade is greatly improved in speed by utilizing the high-speed rotation of the engine, the operation time of weeding workers is saved, and a large amount of manpower resources are reduced.
With the continuous development of scientific technology, modern lawn mowers are mature more and more, but some defects exist, such as the fact that the lawn mowers cannot lift freely, and the weed depth of different lawns is different, and therefore the practicability of the lawn mowers is reduced. Although some existing lawn mowers have a lifting function, for example, patent of invention with publication number CN107006207B discloses a height-adjustable lawn mower, in which when the height is adjusted, a lifting motor is connected with a primary electric push rod and drives the primary electric push rod to move up and down, and a power transmission plate fixed on the primary electric push rod moves up and down along with the primary electric push rod, so as to adjust the height of the grass chopping device relative to the bottom of the frame of the lawn mower. However, the above mower has the following disadvantages: because the garrulous grass device passes through the power transmission board and connects on one-level electric putter for electric putter need bear the whole gravity of garrulous grass device, when elevator motor was out of work, need overcome the gravity of garrulous grass device, makes electric putter be in and continuously bears the weight of the state, and this will lead to elevator motor and one-level electric putter to take place fatigue very easily, causes the damage to elevator motor and one-level electric putter.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the problem that above-mentioned exists, provide a wheeled liftable blade disc lawn mower, this lawn mower not only can realize altitude mixture control, can also alleviate the gravity that electric putter bore, has avoided electric putter to damage because of fatigue, has improved lawn mower's life.
The purpose of the utility model is realized through the following technical scheme:
a wheel type mower with a liftable cutterhead comprises a chassis walking device, a mowing device arranged on the chassis walking device and a height adjusting device arranged between the chassis walking device and the mowing device and used for adjusting the height of the mowing device away from the ground; the height adjusting devices are two groups, the two groups of height adjusting devices are respectively positioned at the left side and the right side of the mowing device, wherein,
the chassis walking device comprises a front axle, a rear axle, a frame arranged between the front axle and the rear axle, walking wheels arranged on the front axle and the rear axle and a walking power mechanism for providing power for the walking wheels; one end of the frame is connected with the front axle, and the other end of the frame is connected with the rear axle;
the mowing device comprises a rack, a cutting knife arranged below the rack and used for cutting off weeds, and a driving mechanism used for driving the cutting knife to rotate;
the height adjusting device is of a parallelogram connecting rod structure and comprises two connecting rods, a connecting rod and an electric push rod; the two connecting rods are respectively arranged at the front end and the rear end of the rack in parallel; each connecting rod is provided with three hinge points, including an upper end hinge point at the upper end, a middle hinge point at the middle part and a lower end hinge point at the lower end; the lower end hinge point is hinged with the frame, and the middle hinge point is hinged with the frame; the connecting rods are arranged between the two connecting rods, and two ends of each connecting rod are respectively hinged with two upper end hinge points; one end of the electric push rod is hinged with the frame, and the other end of the electric push rod is hinged with a hinged point at the upper end of one of the connecting rods.
The working principle of the wheel type liftable cutter head mower is as follows:
when the mowing device works, the walking power mechanism provides power for the walking wheels, so that the walking function of the mowing device is realized; the driving mechanism drives the cutting knife to rotate, so that weeds can be trimmed and cut. When the corresponding weeds are different in depth, the height of the mowing device can be adjusted through the height adjusting device, and the specific process is as follows:
when the mowing device needs to be lifted, electric push rods positioned at two sides of the mowing device extend to push the connecting rods to rotate around a middle hinge point on the frame, so that the upper hinge point rotates downwards, the lower hinge point rotates upwards, the other connecting rod is driven to rotate around the hinge point of the frame under the action of the connecting rods, the two connecting rods rotate synchronously, the frame is lifted gradually under the rotation of the lower hinge point, the height of a cutting knife is adjusted, and the mowing device is lifted; when the mowing device needs to be lowered, the electric push rod contracts reversely, so that the two connecting rods rotate reversely around a hinge point in the middle part at the same time, and the mowing device is lowered; because two sets of height adjusting device distribute in grass cutting device's both sides, realize supporting grass cutting device through four connecting rods, reduced the gravity that electric putter bore, realize grass cutting device's height adjustment through the rotation of drive connecting rod, utilize the arm of force of extension connecting rod to reach laborsaving effect for electric putter can not damage because of tired or overload operation in work, improved the life of lawn mower.
The utility model discloses a preferred scheme, wherein, height adjusting device is still including setting up the connecting rod with gas vaulting pole between the frame, the one end of gas vaulting pole with the connecting rod middle part is articulated, the other end with the frame is articulated. By arranging the air stay bar, when the mowing device needs to be lifted, the electric push rod needs to overcome the gravity of the mowing device to lift, and the connecting rod is beneficial to the movement of the connecting rod by virtue of the elasticity of the air stay bar in the forward movement process, so that the mowing device is favorably lifted smoothly; when the mowing device needs to be reduced, the electric push rod can be influenced by the gravity of the mowing device in the contraction process, so that the descending speed is increased, partial gravity is overcome under the elastic action of the supporting rod, the connecting rod and the electric push rod can run stably, and the descending stability of the mowing device is ensured.
The utility model discloses a preferred scheme, wherein, it is three the pin joint is triangular distribution, and its benefit lies in, can be favorable to reducing electric putter's promotion stroke and make grass cutting device obtain great lifting distance, simultaneously, also makes the structure compacter.
Furthermore, an extension part is arranged at the upper end of the connecting rod and extends towards the direction of the electric push rod; and a fourth hinge point is arranged on the extension part and is hinged with the electric push rod. By adopting the structure, the pushing stroke of the electric push rod can be further reduced, so that the mowing device obtains a larger lifting distance, and the height adjusting effect of the mowing device is improved.
The utility model discloses a preferred scheme, wherein, connect through hanging the mechanism between the front end of the said frame and the said front axle, the rear end is fixedly connected with the middle part of the said rear axle; the suspension mechanism comprises a first hinged seat arranged at the lower end of the frame, a second hinged seat arranged on the front axle and hinged to the first hinged seat, and shock absorbers symmetrically arranged on two sides of the first hinged seat, wherein the upper end of each shock absorber is hinged to the frame, and the lower end of each shock absorber is hinged to the front axle. Adopt above-mentioned structure for the front axle can do the micro-rotation round articulated department, and the impact force that transmits the frame in the unevenness road surface is gone through the bumper shock absorber buffering lawn mower, has reduced frame and grass cutting device's vibrations, guarantees the stationarity that the lawn mower went.
The utility model discloses a preferred scheme, wherein, the cutting knife is a plurality of, and evenly distributed is in the frame, every cutting knife all rotates through the pivot to be connected in the frame, the pivot with actuating mechanism connects. Through setting up a plurality of cutting knives, can increase the cutting area, improve weeding efficiency.
Furthermore, the number of the cutting knives is 3, the 3 cutting knives are uniformly arranged in a triangular shape, one cutting knife is arranged in the middle of the front axle, and the other two cutting knives are respectively arranged on two sides of the rear axle. The weed cutting device has the advantages that the existing space can be better utilized, a better cutting effect is achieved, the interference between the cutting knives is avoided, the cutting range of the mower is also ensured, and the weeds cannot be cut off due to the gap between the cutting knives is avoided.
Preferably, the lower end of the frame is also provided with a baffle plate for preventing weeds from splashing, and the periphery of the baffle plate vertically extends downwards. In the process of cutting weeds, the cut weeds can be driven to splash outwards due to the rotation of the cutting knife, and the splash of the weeds is effectively prevented by arranging the baffle.
The utility model discloses a preferred scheme, wherein, actuating mechanism includes engine, clutch and the synchronous drive subassembly of setting in the frame; the synchronous transmission assembly comprises belt wheels arranged on the rotating shaft and a transmission belt arranged between the belt wheels, the input end of the clutch is connected with the engine, and the output end of the clutch is connected with one of the rotating shafts. By adopting the structure, the clutch is driven by the engine to rotate, one of the rotating shafts is driven to move, and all the rotating shafts are driven to synchronously rotate under the drive of the belt wheel and the transmission belt, so that each cutting knife is driven to simultaneously rotate, and the purpose of cutting off weeds is achieved.
The utility model discloses a preferred scheme, wherein, the walking power mechanism is two sets, and two sets of walking power mechanisms are respectively arranged at both ends of the rear axle, and each set of walking power mechanism comprises a servo motor arranged on the rear axle, a worm gear reducer and an output shaft arranged on the walking wheel; the input end of the worm gear and worm reducer is connected with the main shaft of the servo motor, and the output end of the worm gear and worm reducer is connected with the output shaft. Through two sets of walking power unit drive rear axle both ends walking wheel respectively, realize the walking of lawn mower, specific working process is: the servo motor drives the worm gear and worm reducer to drive the output shaft to rotate, and further drive the travelling wheels to rotate.
The utility model discloses a preferred scheme, wherein, the lawn mower still includes setting up in the wireless control device of frame rear end; the wireless control device comprises a control box, a main control board, a motor driver, a radio control module and a remote controller, wherein the main control board, the motor driver, the radio control module and the remote controller are arranged in the control box, the motor driver is fixedly connected with the main control board, the radio control module is connected with the main control board, and the radio control module is connected with the remote controller through a radio signal. Through setting up above-mentioned structure, the lawn mower can carry out remote control through the operative hand, implements the operation of mowing, convenient operation.
Compared with the prior art, the utility model following beneficial effect has:
1. the utility model discloses in, can realize the altitude mixture control to grass cutting device through setting up height adjusting mechanism, at the weeding in-process, through ruderal high difference, highly carry out nimble regulation to grass cutting device, the flexible high efficiency of weeding operation.
2. The utility model discloses in, can realize the altitude mixture control to grass cutting device through setting up height adjusting mechanism, can be applicable to the weeding operation of complicated relief, adjust grass cutting device's height to the height fluctuation of topography in a flexible way, realize the efficient operation of weeding.
3. The utility model discloses in, because two sets of adjusting device distribute in grass cutting device's both sides, realize supporting grass cutting device through four connecting rods, reduced the gravity load that electric putter bore, rotation through the drive connecting rod realizes grass cutting device's altitude mixture control, utilize the arm of force of extension connecting rod to reach laborsaving effect, avoided electric putter to damage because of the overload operation in work, also avoided electric putter to damage because of fatigue under non-operating condition simultaneously, improved the life of lawn mower.
Drawings
Fig. 1-4 are schematic structural views of a specific embodiment of the wheel-type liftable cutterhead mower of the present invention, wherein fig. 1 is a left side view, fig. 2 is a bottom view, fig. 3 is a perspective view, and fig. 4 is a perspective view in another view direction.
Fig. 5 is a schematic view of a three-dimensional structure of a wheeled liftable cutter head mower without an engine and a clutch.
Fig. 6 is a schematic perspective view of the height adjusting device of the present invention.
Detailed Description
In order to make those skilled in the art understand the technical solution of the present invention well, the present invention will be further described below with reference to the following examples and drawings, but the embodiments of the present invention are not limited thereto.
Referring to fig. 1 to 5, the wheeled mower with a liftable cutterhead in the embodiment includes a chassis walking device, a mowing device disposed on the chassis walking device, and a height adjusting device 1 disposed between the chassis walking device and the mowing device and used for adjusting the height of the mowing device from the ground; the height adjusting devices 1 are two groups, and the two groups of height adjusting devices 1 are respectively positioned on two sides of the mowing device.
Referring to fig. 1 to 5, the chassis walking device includes a front axle 2, a rear axle 3, a frame 4 disposed between the front axle 2 and the rear axle 3, a walking wheel 6 disposed on the front axle 2 and the rear axle 3, and a walking power mechanism 5 for providing power to the walking wheel 6; the front end of the frame 4 is connected with the front axle 2 through a suspension mechanism, and the rear end of the frame is fixedly connected with the middle part of the rear axle 3; the suspension mechanism comprises a first hinged seat 10 arranged at the lower end of the frame 4, a second hinged seat 11 arranged on the front axle 2 and hinged to the first hinged seat 10, and shock absorbers 12 symmetrically arranged on two sides of the first hinged seat 10, wherein the upper ends of the shock absorbers 12 are hinged to the frame 4, and the lower ends of the shock absorbers are hinged to the front axle 2. By adopting the structure, the front axle 2 can rotate slightly around the hinged part, the impact force transmitted to the frame 4 by the mower running on uneven road surfaces is buffered by the shock absorber 12, the vibration of the frame 4 and the mower is reduced, and the running stability of the mower is ensured.
Referring to fig. 1 to 5, the two groups of walking power mechanisms 5 are provided, the two groups of walking power mechanisms 5 are respectively arranged at two ends of the rear axle 3, and each group of walking power mechanisms 5 comprises a servo motor 5-1 arranged on the rear axle 3, a worm and gear reducer 5-2 and an output shaft arranged on the walking wheel 6; the input end of the worm gear and worm reducer 5-2 is connected with the main shaft of the servo motor 5-1, and the output end of the worm gear and worm reducer is connected with the output shaft. Through two sets of walking power unit 5 drive 3 both ends walking wheels 6 of rear axle respectively, realize the walking of lawn mower, specific working process is: the servo motor 5-1 drives the worm gear reducer 5-2, so as to drive the output shaft to rotate, and further drive the travelling wheel 6 to rotate.
Referring to fig. 1 to 5, the mowing device comprises a frame 7, a cutting knife 8 arranged below the frame 7 and used for cutting off weeds, and a driving mechanism 9 used for driving the cutting knife 8 to rotate; the cutting knives 8 are multiple and evenly distributed on the rack 7, each cutting knife 8 is rotatably connected to the rack 7 through a rotating shaft 13, and the rotating shaft 13 is connected with the driving mechanism 9. Through setting up a plurality of cutting knives 8, can increase the cutting area, improve weeding efficiency.
Referring to fig. 1-5, the number of the cutters 8 is 3, the 3 cutters 8 are uniformly arranged in a triangular shape, one cutter 8 is arranged at the middle part close to the front axle 2, and the other two cutters 8 are respectively arranged at the two sides close to the rear axle 3. Its advantage lies in, can be better utilize current space, reach better cutting effect, avoided the interference between the cutting knife 8, also guarantee the cutting scope of lawn mower, avoided having the clearance between the cutting knife 8 and can not amputate weeds.
Referring to fig. 1-5, the lower end of the frame 7 is further provided with a baffle 14 for preventing weeds from splashing, and the periphery of the baffle 14 extends vertically downwards. During the process of cutting weeds, the cut weeds are driven to splash outwards by the rotation of the cutting knife 8, and the splash of the weeds is effectively prevented by arranging the baffle plate 14.
Referring to fig. 1-5, the driving mechanism 9 includes an engine 9-1, a clutch and a synchronous transmission assembly provided on the frame 7; the synchronous transmission assembly comprises belt wheels 9-2 arranged on the rotating shaft 13 and a transmission belt 9-3 arranged between the belt wheels 9-2, the input end of the clutch is connected with the engine 9-1, and the output end of the clutch is connected with one rotating shaft 13. By adopting the structure, the engine 9-1 drives the clutch to rotate to drive one of the rotating shafts 13 to move, and all the rotating shafts 13 are driven to synchronously rotate under the driving of the belt wheel 9.2 and the transmission belt 9-3, so that each cutting knife 8 is driven to simultaneously rotate, and the purpose of cutting off weeds is achieved.
Referring to fig. 1-6, the height adjusting device 1 is a parallelogram link structure, and comprises two links 1-1, a connecting rod 1-2 and an electric push rod 1-3; the two connecting rods 1-1 are respectively arranged at the front end and the rear end of the rack 7 in parallel; each connecting rod 1-1 is provided with three hinge points, including a hinge point 1-11 at the upper end, a hinge point 1-12 at the middle part and a hinge point 1-13 at the lower end; the lower end hinge points 1-13 are hinged with the frame 7, and the middle hinge points 1-12 are hinged with the frame 4; the connecting rod 1-2 is arranged between the two connecting rods 1-1, and two ends of the connecting rod 1-2 are respectively hinged with two upper end hinge points 1-11; one end of the electric push rod 1-3 is hinged with the frame 4, and the other end is hinged with a hinged point 1-11 at the upper end of one of the connecting rods 1-1.
Referring to fig. 1-6, the height adjusting device 1 further includes an air stay bar 1-4 disposed between the connecting bar 1-2 and the frame 4, wherein one end of the air stay bar 1-4 is hinged to the middle of the connecting bar 1-2, and the other end is hinged to the frame 4. By arranging the air supporting rods 1-4, when the mowing device needs to be lifted, the electric push rod 1-3 needs to overcome the gravity of the mowing device to lift, and the connecting rod 1-2 is beneficial to the movement of the connecting rod 1-2 by virtue of the elasticity of the air supporting rods 1-4 in the forward movement process, so that the mowing device can be lifted smoothly; when the mowing device needs to be lowered, the electric push rod 1-3 is influenced by the gravity of the mowing device in the retraction process, so that the lowering speed is increased, partial gravity is overcome under the action of the elastic force of the supporting rod, the connecting rod 1-2 and the electric push rod 1-3 can stably run, and the lowering stability of the mowing device is guaranteed.
Referring to fig. 1-6, the three hinge points are distributed in a triangular shape, which is beneficial to reduce the pushing stroke of the electric push rod 1-3 to obtain a larger lifting distance of the mowing device, and meanwhile, the structure is more compact.
Referring to fig. 1-6, an extension part is arranged at the upper end of the connecting rod 1-1, and the extension part extends towards the direction of the electric push rod 1-3; and the extension part is provided with fourth hinge points 1-14, and the fourth hinge points 1-14 are hinged with the electric push rod 1-3. By adopting the structure, the pushing stroke of the electric push rod 1-3 can be further reduced, so that the mowing device obtains a larger lifting distance, and the height adjusting effect of the mowing device is improved.
Referring to fig. 1-5, the mower further comprises a wireless control device disposed at the rear end of the frame 4; the wireless control device comprises a control box, a main control board, a motor driver, a radio control module and a remote controller, wherein the main control board, the motor driver, the radio control module and the remote controller are arranged in the control box, the motor driver is fixedly connected with the main control board, the radio control module is connected with the main control board, and the radio control module is connected with the remote controller through a radio signal. Through setting up above-mentioned structure, the lawn mower can carry out remote control through the operative hand, implements the operation of mowing, convenient operation.
Referring to fig. 1-6, the working principle of the wheel-type liftable cutterhead mower is as follows:
when the mowing device works, the walking power mechanism 5 provides power for the walking wheel 6, so that the walking function of the mowing device is realized; the driving mechanism 9 drives the cutting knife 8 to rotate, so that weeds can be trimmed and cut. When the corresponding weeds are different in depth, the height of the mowing device can be adjusted through the height adjusting device 1, and the specific process is as follows:
when the mowing device needs to be lifted, electric push rods 1-3 positioned at two sides of the mowing device extend to push a connecting rod 1-1 to rotate on a frame 4 around a middle hinge point 1-12, so that a hinge point 1-11 at the upper end rotates downwards, a hinge point 1-13 at the lower end rotates upwards, under the action of the connecting rod 1-2, another connecting rod 1-1 is driven to rotate around a hinge point of the frame 4, the two connecting rods 1-1 rotate synchronously, a frame 7 is gradually lifted under the rotation of the hinge point 1-13 at the lower end, the height of a cutting knife 8 is adjusted, and the mowing device is lifted; when the mowing device needs to be lowered, the electric push rod 1-3 contracts reversely, so that the two connecting rods 1-1 rotate reversely around the middle hinge point 1-12 at the same time, and the mowing device is lowered; because the two groups of height adjusting devices 1 are distributed on two sides of the mowing device, the mowing device is supported by the four connecting rods 1-1, the gravity borne by the electric push rods 1-3 is reduced, the height adjustment of the mowing device is realized by driving the connecting rods 1-1 to rotate, the labor-saving effect is achieved by utilizing the force arms of the lengthened connecting rods 1-1, the electric push rods 1-3 cannot be damaged due to fatigue or overload operation during working, and the service life of the mowing machine is prolonged.
The above is the preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.