CN110583209A

CN110583209A - Grass cutter

Info

Publication number: CN110583209A
Application number: CN201810602246.4A
Authority: CN
Inventors: 孔钊; 韩奎
Original assignee: Suzhou Cleva Precision Machinery and Technology Co Ltd
Current assignee: Suzhou Cleva Precision Machinery and Technology Co Ltd
Priority date: 2018-06-12
Filing date: 2018-06-12
Publication date: 2019-12-20

Abstract

The invention discloses a mower, comprising: organism, set up in the cutting mechanism of organism bottom and install the walking wheelset on the organism, walking wheelset includes a plurality of walking wheels, and every walking wheel drives rotatoryly by its transmission shaft that corresponds, the transmission shaft has the rotation output end and relative rotatory receiving terminal of connecting the walking wheel, rotation output end can change for the position of organism along vertical direction, the outside cover of transmission shaft is equipped with the protective sheath, the protective sheath includes flexible portion, along with rotation output end changes for the position of organism, the protective sheath realizes along the axial length change of transmission shaft through the deformation of flexible portion, and the protective sheath both ends are restricted, can not be rotatory along with the transmission shaft. Through set up the protective sheath on the transmission shaft at lawn mower walking wheel, the flexible portion of protective sheath makes the length of protective sheath change along with the unsteady of walking wheel through warping, effectual protection transmission shaft to effectually prevent that weeds from twining the transmission shaft.

Description

Grass cutter

Technical Field

The invention relates to a mower, in particular to a mowing robot which can move outdoors and autonomously perform work tasks.

Background

The mower is a mechanical tool for trimming lawns, vegetations and the like, comprises a cutter head, a motor, blades, a control part and the like, and mainly utilizes the blades to cut under the high-speed rotation of the motor, thereby saving the operation time of manual weeding. With the development of science and technology, intelligent automatic walking equipment is well known, and because the automatic walking mowing robot can automatically finish the lawn mowing work without manual direct control and operation, the power is low, the noise is low, the pollution is avoided, the appearance is exquisite and attractive, the manual operation is greatly reduced, and the automatic walking mowing robot is more and more popular with people.

In the mowing robot in the prior art, the walking transmission shaft is exposed outside, and grass winding is easy to occur when the mowing robot mows, so that the normal work of the mowing robot is influenced.

Disclosure of Invention

The invention aims to provide a mower which is reliable in use and long in service life.

To achieve the above object, the present invention provides a lawnmower comprising: organism, set up in the cutting mechanism of organism bottom and install the walking wheelset on the organism, walking wheelset includes a plurality of walking wheels, and every walking wheel drives rotatoryly by its transmission shaft that corresponds, the transmission shaft has the rotation output end and relative rotatory receiving terminal of connecting the walking wheel, rotation output end can change for the position of organism along vertical direction, the outside cover of transmission shaft is equipped with the protective sheath, the protective sheath includes flexible portion, along with rotation output end changes for the position of organism, the protective sheath realizes along the axial length change of transmission shaft through the deformation of flexible portion, and the protective sheath both ends are restricted, can not along with the transmission shaft is rotatory.

As a further improvement of an embodiment of the present invention, each of the traveling wheels has a wheel axle fixed relative thereto, the rotation receiving end is connected to a driving axle, the driving axle is configured as a ball-end driving axle to transmit rotation of the driving axle to the wheel axle, the traveling wheel includes a wheel seat supporting the wheel axle, the machine body is provided with a supporting seat supporting the driving axle, and both ends of the protective sleeve are fixed to the wheel seat and the supporting seat, respectively.

As a further improvement of an embodiment of the present invention, the protective sleeve includes two funnel-shaped end portions, and the two funnel-shaped end portions are respectively fixed to the wheel seat and the support seat.

As a further improvement of an embodiment of the present invention, the inner sides of the two end portions of the protective sleeve are respectively provided with a protrusion, the outer sides of the wheel seat and the support seat are respectively provided with a groove matched with the corresponding protrusion, and the protrusion is clamped into the groove so that the two end portions of the protective sleeve are respectively fixed to the wheel seat and the support seat.

As a further improvement of the embodiment of the present invention, the protective sleeve includes a first end portion connected to the wheel seat, a second end portion connected to the support seat, and a thin tube portion connecting the first end portion and the second end portion, the first end portion is sleeved on the periphery of the wheel seat, the second end portion is sleeved on the periphery of the support seat, the diameter of the first end portion and the diameter of the second end portion are both larger than the diameter of the thin tube portion, and the first end and the second end portion are respectively sleeved on the wheel seat and the end portion of the support seat opposite to the thin tube portion.

As a further improvement of an embodiment of the present invention, two parallel connecting rods with equal length are disposed between the wheel seat and the supporting seat, one end of each connecting rod is hinged to the wheel seat, the other end of each connecting rod is hinged to the supporting seat, the traveling wheel moves in a vertical direction relative to the machine body through the two connecting rods, and the protective sleeve is located within a contour defined by the two connecting rods.

As a further improvement of an embodiment of the present invention, the protective sheath includes two end portions in a funnel shape and a thin tube portion connecting between the two end portions, and the flexible portion is provided in a middle portion of the thin tube portion.

As a further improvement of an embodiment of the invention, the flexible portion is configured as a fold portion, and the fold portion effects a change in length of the protective sheath by expansion and contraction.

As a further development of an embodiment of the invention, the protective sleeve is constructed as a protective sleeve made of an elastic material.

As a further improvement of an embodiment of the present invention, the protective sheath is configured as a silicone protective sheath.

Compared with the prior art, the invention has the beneficial effects that: according to the mower, the transmission shaft is provided with the protective sleeve, the flexible portion of the protective sleeve deforms to enable the length of the protective sleeve to change along with the floating of the traveling wheels, the transmission shaft is effectively protected, water and dust can be prevented, and the service life of the mower is prolonged.

Drawings

Fig. 1 is a perspective view of a mowing robot in a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view of the lawn mowing robot of FIG. 1 taken along line A-A;

FIG. 3 is a front view of one of the road wheel portions of the mowing robot of FIG. 1, wherein the road wheels are not floating;

FIG. 4 is a top view of the portion of the road wheel of FIG. 3;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is an enlarged schematic view of portion a of FIG. 5;

FIG. 7 is similar to FIG. 3 with the road wheels floating upwardly;

FIG. 8 is a cross-sectional schematic view of the travel wheel of FIG. 7 floating;

fig. 9 is an enlarged schematic view of a portion b of fig. 8.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

Referring to fig. 1, in the preferred embodiment of the present invention, the lawn mower is preferably a lawn mowing robot, which is used for automatically walking and working on the ground, and energy for walking and working is provided by a battery. The mowing robot comprises a machine body 10, a cutting mechanism arranged at the bottom of the machine body 10 and used for mowing the lawn, and a walking module arranged on the machine body, wherein the walking module is used for walking and steering, and the cutting mechanism can comprise cutting blades, cutting lines and other cutting elements capable of achieving mowing the lawn. In addition, the mowing robot further comprises a control module which is used for coordinating the working module and the walking module, and the control module can enable the mowing robot to automatically walk on a lawn and mow the lawn under the unattended condition. In the description of the present invention, unless otherwise noted, directional terms such as front, rear, left, right, up, down, and the like are referred to with reference to a direction in which the robot lawnmower travels normally forward as shown in fig. 1.

Referring to fig. 2, the traveling module of the robot mower includes a traveling wheel set and a traveling motor for driving the traveling wheel set. The traveling wheel set is mounted on the machine body 10, specifically, the machine body 10 includes a chassis 12, and the traveling wheel set is mounted on the chassis 12. In this embodiment, the walking wheel set includes four walking wheels 21, which are respectively a front walking wheel disposed on two sides of the front portion of the body and a rear walking wheel disposed on two sides of the rear portion of the body, and each walking wheel 21 is driven to rotate by a corresponding transmission shaft 42.

Referring to fig. 2 to 6, taking one of the traveling wheels as an example to be described in detail, the traveling motor drives the traveling wheel 31 to rotate through the transmission shaft 42, the transmission shaft 42 has a rotation output end connected to the traveling wheel 21 and an opposite rotation receiving end, wherein the position of the rotation output end relative to the machine body 10 along the vertical direction can be changed, that is, the traveling wheel 21 driven by the transmission shaft 42 can float up and down along the machine body 10, the outer side of the transmission shaft 42 is sleeved with a protective sleeve 50, the protective sleeve 50 includes a flexible portion 53, along with the position change of the rotation output end relative to the machine body, the length change of the protective sleeve 50 along the axial direction of the transmission shaft 42 is realized through the deformation of the flexible portion 53, and both ends of the. Thus, when the robot lawnmower is cutting grass, the grass is separated from the rotating drive shaft 42 by the protective cover 50, thereby preventing the drive shaft 42 from being entangled with the grass. Moreover, when the traveling wheels 21 float with respect to the body 10, that is, the transmission shaft 42 is changed from the horizontal position to the inclined position, the length of the protecting cover 50 may be changed, thereby preventing the protecting cover 50 from being out of the limit due to the force and not functioning as a grass entanglement preventing function.

Specifically, each walking wheel 21 is provided with a wheel axle 22 fixed relative to the walking wheel, a rotating receiving end of a transmission shaft 42 is connected with a driving shaft 41 driven by a motor, the transmission shaft 42 is configured as a ball-head transmission shaft so as to transmit the rotation of the driving shaft 41 to the wheel axle 22, and then the wheel axle 22 drives the walking wheel 21 to rotate so as to realize the walking of the mowing robot. The driving shaft 41 may be directly driven by a motor or driven by a transmission mechanism driven by a motor, and the transmission mechanism may be a gear transmission mechanism, a belt wheel transmission mechanism, a sprocket transmission mechanism, or the like. In this embodiment, the traveling wheels located on the same side are directly driven by the motor, and the other is driven by the pulley mechanism driven by the motor, as shown in fig. 3 and 4, the driving shaft 41 corresponding to the traveling wheel 21 is a pulley shaft driven by the pulley of the pulley mechanism.

With continued reference to fig. 3 to 6, the road wheel 21 has a wheel seat 23 supporting the wheel axle 22, i.e. the wheel axle 22 is supported on the wheel seat 23 through a bearing, the wheel seat 23 can float up and down along with the road wheel 21 and can not rotate along with the road wheel 21, and one end of the protective sleeve 50 is fixed on the wheel seat 23. The machine body is provided with a support base 13 for supporting the driving shaft 41, i.e. the driving shaft 41 is supported on the support base 13 through a bearing, the support base 13 can be fixedly installed on the chassis 12, and the other end of the protective sleeve 50 is fixed on the support base 13. Thus, the rotating shaft 22, the transmission shaft 42 and the driving shaft 41 which drive the traveling wheels 21 to rotate are respectively positioned in the wheel seat 23, the protective sleeve 50 and the supporting seat 13, the wheel seat 23, the protective sleeve 50 and the supporting seat 13 do not rotate, the rotating shaft 22, the transmission shaft 42 and the driving shaft 41 do not contact with outside grass or sundries, and grass winding does not occur.

Preferably, the protective sheath 50 includes a first end 51 and an opposite second end 52, both of which are funnel-shaped, and a thin tube portion connecting the first end 51 and the second end 52, and the flexible portion 53 is disposed at a middle portion of the thin tube portion. The first end 51 is sleeved on the periphery of the wheel seat 23, the second end 52 is sleeved on the periphery of the support seat 13, and the diameter of the first end 51 and the diameter of the second end 52 are both larger than the diameter of the thin tube part, so that the protection sleeve 50 is convenient to mount. Specifically, the first end 51 is provided with a first protrusion 511, the second end 52 is provided with a second protrusion 522, the first protrusion 511 and the second protrusion 522 may be configured as ring-shaped protrusions matching with the funnel-shaped inner circumferential surface, and the protruding direction of the first protrusion 511 and the second protrusion 522 is substantially perpendicular to the longitudinal extension direction of the protection sleeve 50. Correspondingly, a first groove 231 matched with the first protrusion 511 in shape is arranged on the outer side of the wheel seat 23, the first groove 231 can also be an annular groove, a second groove 132 matched with the second protrusion 522 in shape is also arranged on the outer side of the supporting seat 13, and the second groove 132 can also be an annular groove. The two ends of the protection sleeve 50 are fixed relative to the wheel seat 23 and the rotation support seat 13 through the matching of the protrusion and the groove. In addition, the funnel-shaped diameter of the first end 51 is larger than the funnel-shaped diameter of the second end 52 to facilitate the engagement with the wheel seat 23 and the support seat 13.

Further, the flexible portion 53 is configured as a corrugated portion, which achieves a change in length of the protective sheath 50 by expansion and contraction. Further, the protective sheath 50 is configured as a protective sheath made of an elastic material, such as a silicone sheath, a rubber sheath, or the like.

In this embodiment, the axle 22 of the walking wheel 21 is connected to the axle of the belt wheel for inputting the rotation power through the ball head transmission shaft, so that the rotation of the walking wheel is not affected when the walking wheel 21 moves up and down relative to the chassis, i.e. the ball head transmission shaft forms a floating structure for connecting the axle 22 of the walking wheel 21 and the machine body. Further, the floating structure further comprises a link mechanism, the link mechanism is connected between the wheel seat 23 of the walking wheel 21 and the supporting seat 13, the link mechanism comprises two parallel connecting rods 31 and 32 with equal length and arranged between the wheel seat 23 and the supporting seat 13, one ends of the two connecting rods are hinged with the wheel seat 23, the other ends of the two connecting rods are hinged with the supporting seat 13, the walking wheel 21 moves along the vertical direction through the two connecting rods relative to the machine body, and the protective sleeve 50 is located in a contour limited by the two connecting rods. The two connecting rods are an upper connecting rod 31 positioned on the upper side of the ball head transmission shaft and a lower connecting rod 32 positioned on the lower side of the ball head transmission shaft, shaft holes are respectively formed in two ends of the upper connecting rod 31 and two ends of the lower connecting rod 32, and the upper connecting rod 31 and the lower connecting rod 32 are pivotally connected with the wheel seat 23 and the supporting seat 13 through pin shafts. The up-and-down movement of the traveling wheels 21 is made more stable by providing the upper link 31 and the lower link 32.

In the walking process of the mowing robot, the walking wheels 21 can be adjusted in position according to the height fluctuation of the ground, and the chassis is always kept in a horizontal position, so that the working stability of the mowing robot is improved. Fig. 5 and 6 show a state where the traveling wheels 21 do not float, and fig. 8 and 9 show a state where the traveling wheels 21 float upward, the transmission shafts 42 of the traveling wheels 21 are inclined with respect to a horizontal plane, and the length of the protective covers 50 is increased by the extension of the wrinkled portions, so that the transmission shafts 42 can be completely protected inside, and not only can the grass-winding prevention function be achieved, but also the water and dust prevention function can be achieved, and the service life of the mowing robot can be prolonged.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims

1. A lawn mower, comprising: organism, set up in the cutting mechanism of organism bottom and install the walking wheelset on the organism, the walking wheelset includes a plurality of walking wheels, its characterized in that: every walking wheel is driven rotatoryly by its transmission shaft that corresponds, the transmission shaft has the rotatory output end and relative rotatory receiving terminal of connecting the walking wheel, rotatory output end can change for the position of organism along vertical direction, the outside cover of transmission shaft is equipped with the protective sheath, the protective sheath includes the flexible portion, along with rotatory output end changes for the position of organism, the protective sheath passes through the deformation realization of flexible portion and changes along the axial length of transmission shaft, and the protective sheath both ends are restricted can not along with the transmission shaft is rotatory.

2. The mower of claim 1 wherein each road wheel has an axle fixed relative thereto, said rotation receiving end being connected to a drive shaft, said drive shaft being configured as a ball-end drive shaft for transmitting rotation of said drive shaft to said axle, said road wheel including a wheel seat supporting said axle, said body being provided with a support seat supporting said drive shaft, said protective sleeve being secured at each end to said wheel seat and said support seat.

3. A lawnmower as claimed in claim 2, wherein the protective sleeve comprises funnel-shaped ends which are secured to the wheel and support respectively.

4. The mower according to claim 3, wherein the inner sides of the two end portions of the protecting cover are respectively provided with a protrusion, the outer sides of the wheel seat and the supporting seat are respectively provided with a groove matched with the corresponding protrusion, and the protrusion is clamped into the groove to fix the two end portions of the protecting cover to the wheel seat and the supporting seat respectively.

5. The mower of claim 3, wherein the protective sleeve comprises a first end portion connected to the wheel seat, a second end portion connected to the support seat, and a thin tube portion connecting the first end portion and the second end portion, the first end portion is sleeved on the periphery of the wheel seat, the second end portion is sleeved on the periphery of the support seat, the diameter of the first end portion and the diameter of the second end portion are both larger than the diameter of the thin tube portion, and the first end portion and the second end portion are respectively sleeved on the wheel seat and the end portion of the support seat opposite to the thin tube portion.

6. The mower of claim 2 wherein two parallel links of equal length are provided between said wheel base and said support base, one end of said two links being pivotally connected to said wheel base and the other end of said two links being pivotally connected to said support base, said traction wheel being movable in a vertical direction relative to said body by said two links, said protective sleeve being within the profile defined by said two links.

7. A lawnmower as claimed in claim 1, wherein the protective sleeve comprises two ends in the form of a funnel and a thin tube connecting the two ends, the flexible portion being provided in the middle of the thin tube.

8. The mower of claim 1 wherein the flexible portion is configured as a crimp that effects a change in length of the protective sleeve by extending and retracting.

9. The mower of claim 1 wherein the protective sleeve is configured as a protective sleeve made of an elastomeric material.

10. The mower of claim 9 wherein the protective sleeve is configured as a silicone protective sleeve.