CN109997495B

CN109997495B - Grass cutter

Info

Publication number: CN109997495B
Application number: CN201910329602.4A
Authority: CN
Inventors: 李孟钦; 刘旭野; 王利鹏; 郑卓斌; 王立磊
Original assignee: Guangzhou Keyu Robot Co Ltd
Current assignee: Guangzhou Keyu Robot Co Ltd
Priority date: 2019-04-23
Filing date: 2019-04-23
Publication date: 2020-10-23
Anticipated expiration: 2039-04-23
Also published as: CN109997495A

Abstract

The invention discloses a mower, which belongs to the technical field of forestry machinery and comprises a machine main body, a supporting seat fixedly connected with the machine main body, a mowing cutter head arranged on the supporting seat, a balance frame and two adjusting devices, wherein the balance frame is provided with a middle part and two side parts, the middle part of the balance frame is rotatably connected with the supporting seat, the balance frame can linearly move relative to the supporting seat along a first direction, and the mowing cutter head is connected with the balance frame; the adjusting device is fixed on the supporting seat, one adjusting device is arranged on each side portion of the balancing frame, and the adjusting devices can adjust the relative positions of the two side portions of the balancing frame along the first direction to drive the balancing frame to move and swing relative to the supporting seat. The supporting seat, the balancing stand and the adjusting device are matched, so that the height and the swing angle of the mowing cutter head can be adjusted, and the mowing cutter head can adapt to more application occasions.

Description

Grass cutter

Technical Field

The invention relates to the technical field of forestry machinery, in particular to a mower.

Background

Mechanical mowing is widely used for maintaining green gardening and replanting as a weeding mode with high efficiency and long-lasting work. A lawn mower generally includes a frame, an engine, a traveling mechanism, and a mower deck, with the mower deck and frame moving with the traveling mechanism. The height of the grass cutting cutterhead determines the height of grass cutting, and grass higher than the grass cutting cutterhead is cut.

In the currently used lawn mowers, the position of a mowing cutter head is mostly fixed in the mowing process. When the weeds with high growth are encountered, the mowing current rises, and the service life of the battery is influenced if the mowing current is long; meanwhile, when meeting weeds with harsh positions, working blind areas can be generated, and the mowing efficiency is influenced. If want to change the height of mowing, need dismantle the cutter head of mowing to the position of the high spacer pin of cutter head of mowing changes, height-adjusting inefficiency, user experience is poor.

Disclosure of Invention

The invention aims to provide a mower, which aims to solve the technical problem that the position of a mowing cutter head is inconvenient to adjust in the prior art.

As the conception, the technical scheme adopted by the invention is as follows:

the utility model provides a lawn mower, including the machine main part, with machine main part fixed connection's supporting seat with set up in grass cutting blade disc on the supporting seat still includes:

the balance frame is provided with a middle part and two side parts, the middle part of the balance frame is rotationally connected with the supporting seat, the balance frame can linearly move along a first direction relative to the supporting seat, and the mowing cutter head is connected with the balance frame;

the two adjusting devices are fixed on the supporting seat, one adjusting device is arranged on each side portion of the balancing frame, and the adjusting devices can adjust the relative positions of the two side portions of the balancing frame along the first direction to drive the balancing frame to move and swing relative to the supporting seat.

The middle part of the balancing stand is provided with a rotating shaft, the supporting seat is provided with a sliding groove extending along the first direction, and the rotating shaft penetrates through the sliding groove. The spout has spacing and guide effect for the removal of pivot is steady.

The two adjusting devices are symmetrically arranged on two sides of the rotating shaft. The structure is compact, and the stress balance of the balance frame is ensured, so that the balance frame moves stably.

The adjusting device comprises a driving part and a transmission mechanism connected with the output end of the driving part, and the transmission mechanism is rotationally connected with the balance frame. The driving part transmits power to the transmission mechanism, the transmission mechanism transmits the power to the balancing stand to drive the balancing stand to move, and the transmission mechanism is rotatably connected with the balancing stand to prevent the balancing stand from being blocked.

The transmission mechanism comprises a cam and a roller, the cam is connected with the driving part, and the roller is rotatably arranged on the balancing stand. When the cam rotates, the roller is driven to rotate, and due to the eccentric structure of the cam, the roller can rotate around the axis of the roller, and can move along the first direction under the pushing of the cam, so that the position of the side part of the balancing stand is changed.

Wherein, elastic connection between balancing stand and the supporting seat. The stability of the balancing stand during movement is ensured.

The transmission mechanism comprises a gear and a rack, the gear is connected with the driving part, the rack extends along the first direction, and the balance frame is rotatably connected with the rack. When the gear rotates, the gear drives the rack to move, and the rack pushes the balancing stand, so that the position of the side part of the balancing stand is changed.

Wherein, elastic connection between balancing stand and the rack. The stability of the balancing stand during movement is ensured.

The supporting seat comprises a cover body and a rod body connected with the cover body, the balance frame is connected with the rod body in a rotating mode, the mowing cutter head is located in the cover body and is installed on the cutter shaft, and the cutter shaft penetrates out of the cover body and is connected with the balance frame in a rotating mode. The cover body plays a role in protecting the mowing cutter head and also prevents an operator from mistakenly touching the mowing cutter head. The body of rod plays the supporting role, occupies less space.

The balance rack is characterized by further comprising a speed reducing mechanism connected with the cutter shaft and a motor connected with the speed reducing mechanism, wherein the motor and the speed reducing mechanism are arranged on the balance rack. The motor drives the cutter shaft to rotate through the speed reducing mechanism, the mowing cutter head, the cutter shaft, the speed reducing mechanism and the motor can move along with the balance frame, and the movement of the balance frame and the rotation of the mowing cutter head along the motor do not influence each other.

The invention has the beneficial effects that:

according to the mower provided by the invention, the two side parts of the balancing frame are adjusted through the adjusting device, when the two side parts of the balancing frame synchronously move, the balancing frame linearly moves, the position of the balancing frame in the first direction can be changed, namely, the height of the mowing cutter head in the vertical direction can be adjusted, and then the mowing cutter head is lifted; when the two side parts of the balancing frame move relatively, the balancing frame can rotate around the middle part, and the two ends of the balancing frame generate a height difference, so that the mowing cutter head can swing, and the mowing angle is changed; therefore, the supporting seat, the balancing stand and the adjusting device are matched, so that the height and the swing angle of the mowing cutter head can be adjusted, and the mowing cutter head can adapt to more application occasions.

Drawings

FIG. 1 is a schematic view of a single orientation of a mower according to an embodiment of the present invention;

FIG. 2 is a schematic view of another orientation of the mower of FIG. 1;

FIG. 3 is a schematic view of a mower according to an embodiment of the present invention in half section;

FIG. 4 is a cross-sectional view of a lawn mower provided in accordance with an embodiment of the present invention;

FIG. 5 is a schematic view of a mower deck of a lawnmower according to an embodiment of the present invention in an initial position;

FIG. 6 is a schematic view of a mowing knife disc of a mowing machine provided by the embodiment of the invention after moving along a straight line;

FIG. 7 is a schematic view of a rotary mower deck of a mower according to an embodiment of the present invention;

FIG. 8 is a schematic view of a mower deck of a mower according to a second embodiment of the present invention in an initial position;

FIG. 9 is a schematic view of a mowing knife disk of a mowing machine provided by a second embodiment of the invention moving along a straight line;

fig. 10 is a schematic view of a rotary mower deck of a mower according to a second embodiment of the present invention.

In the figure:

1. a supporting seat; 11. a cover body; 111. an opening; 12. a rod body; 121. a chute;

21. a grass cutter head; 22. a cutter shaft; 23. a motor; 24. a speed reduction mechanism;

3. a balancing stand; 31. a rotating shaft;

4. an adjustment device; 41. a drive section; 42. a cam; 43. a roller; 44. a gear; 45. a rack;

5. a spring.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Example one

Referring to fig. 1 to 4, the present invention provides a lawn mower for mowing grass. The lawn mower includes the machine main part, with machine main part fixed connection's supporting seat 1 with set up the blade disc 21 of mowing on supporting seat 1, supporting seat 1 includes the cover body 11 and the body of rod 12 of being connected with the cover body 11, blade disc 21 of mowing is located the cover body 11, the cover body 11 plays the guard action to blade disc 21 of mowing, also prevents that operating personnel from bumping blade disc 21 of mowing by mistake. The rod body 12 is disposed on the outer side surface of the cover body 11 for connection with other components. The grass cutter 21 is arranged on the cutter shaft 22, the cutter shaft 22 is driven by a motor 23, the motor 23 is connected with the cutter shaft 22 through a speed reducing mechanism 24, and the motor 23 drives the grass cutter 21 to rotate at a high speed for cutting grass. In order to facilitate heat dissipation and discharge of the grass clippings, the cover 11 is provided with an opening 111.

The mower further comprises a balance frame 3, the balance frame 3 is connected with the rod body 12, the cutter shaft 22 penetrates through the cover body 11 to be rotatably connected with the balance frame 3, namely, the mowing cutter head 21 is connected with the balance frame 3 through the cutter shaft 22, and the motor 23 and the speed reducing mechanism 24 are both arranged on the balance frame 3. That is, the mower deck 21, the cutter shaft 22, the reduction mechanism 24, and the motor 23 can move along with the balance frame 3. The movement of the balancing stand 3 and the rotation of the mower deck 21 along itself are not affected, that is, the mowing action and the position adjustment are not affected. The speed reduction mechanism 24 is of a conventional structure and will not be described in detail.

The balancing stand 3 has a middle part and two lateral parts, and the middle part of the balancing stand 3 is rotatably connected with the supporting seat 1, namely the balancing stand 3 is rotatably connected with the rod body 12. In the present embodiment, a lever mechanism is formed between the balance frame 3 and the support base 1. Further, the gimbal 3 can follow first direction rectilinear movement for supporting seat 1, offers the spout 121 that extends along the first direction on the body of rod 12 of supporting seat 1, and the middle part of gimbal 3 is provided with pivot 31, and in the spout 121 was worn to locate by pivot 31, the gimbal 3 can revolute the axis rotation of pivot 31, also can follow spout 121 rectilinear movement. The first direction is perpendicular to the axis of the rotating shaft 31, and is a vertical direction when mowing on a horizontal plane. Of course, a slide rail may also be disposed on the rod body 12 of the supporting seat 1, and the rotating shaft 31 is slidably connected with the slide rail, which is not described herein again.

The mower further comprises two adjusting devices 4, the adjusting devices 4 are fixed on the supporting seat 1, each side portion of the balancing frame 3 is provided with one adjusting device 4, and the adjusting devices 4 can adjust the relative positions of the two side portions of the balancing frame 3 along the first direction to drive the balancing frame 3 to move and swing relative to the supporting seat 1. The two adjusting devices 4 work independently to adjust the two ends of the balancing stand 3.

When the two side parts of the balancing frame 3 move synchronously, the balancing frame 3 moves linearly, the position of the balancing frame 3 in the first direction can be changed, namely the height of the mowing cutter disc 21 in the vertical direction can be adjusted, and then the mowing cutter disc 21 is lifted; when the two side parts of the balancing frame 3 move relatively, the balancing frame 3 rotates around the middle part, and the two ends of the balancing frame 3 generate a height difference, so that the mowing cutter head 21 swings, and the mowing angle is changed; therefore, the supporting seat 1, the balancing stand 3 and the adjusting device 4 are matched to adjust the height and the swing angle of the mower disc 21, so that the mower disc 21 can adapt to more application occasions.

In this embodiment, the two adjusting devices 4 are symmetrically disposed on two sides of the rotating shaft 31, the adjusting devices 4 have a supporting point for the balancing stand 3, and the distances from the two supporting points to the center line of the rotating shaft 31 are equal, so that the structure is compact and the balance is good. Of course, the two adjusting devices 4 may also be asymmetric about the rotating shaft 31, i.e. the distances of the two support points to the center line of the rotating shaft 31 are not equal. As long as the position adjustment of the two side portions can be achieved such that the two side portions generate a height difference in the first direction.

The adjusting device 4 comprises a driving part 41 and a transmission mechanism connected with the output end of the driving part 41, and the transmission mechanism is rotatably connected with the balancing stand 3. The power of the driving part 41 is transmitted to the balance frame 3 through the transmission mechanism, and then the balance frame 3 is driven to move. In the present embodiment, the driving portion 41 is a motor.

In the present embodiment, the transmission mechanism includes a cam 42 and a roller 43, the cam 42 is connected to the driving portion 41, and the roller 43 is rotatably disposed on the balance frame 3. During the rotation of the cam 42, the roller 43 can be pushed to change the position of the roller 43, and meanwhile, the roller 43 rotates around the axis of the roller 43, so that the rotation of the cam 42 is smoother.

In order to ensure the moving stability of the balancing stand 3, the balancing stand 3 is elastically connected with the supporting seat 1. Springs 5 are provided between the adjusting device 4 and the rod body 12 on both sides of the rotary shaft 31.

Referring to fig. 5 to 7, the mower deck 21 is in the initial position when it is horizontally disposed. When the mower deck 21 is in the initial position, the two sides of the balancing stand 3 are in the same position in the first direction, i.e., there is no height difference between the two sides of the balancing stand 3. At this time, the rotating shaft 31 of the balance frame 3 abuts against the bottom end of the chute 121.

When the height of the mower deck 21 needs to be adjusted, the two cams 42 are synchronously adjusted, so that the two rollers 43 are located at the same position along the first direction, that is, the two rollers 43 are symmetrical about the rotating shaft 31 of the balancing stand 3, at this time, there is no height difference between the two sides of the balancing stand 3, that is, the balancing stand 3 moves linearly along the first direction, the rotating shaft 31 slides along the sliding groove 121, and the height of the mower deck 21 is adjusted.

When the angle of the mower deck 21 needs to be adjusted, the two cams 42 are adjusted so that the positions of the two rollers 43 along the first direction have a height difference, in which case, one cam 42 rotates, the other cam 42 does not move, or both cams 42 rotate, but the rotations are not synchronous, for example, the directions or the speeds are different, and these can be set according to actual needs. After the height difference of the two rollers 43 occurs along the first direction, the balance frame 3 is made to rotate around the rotating shaft 31, so as to drive the mower disc 21 to rotate, and the angle of the mower disc 21 is adjusted.

Example two

Fig. 8 to 10 show a second embodiment, wherein the same or corresponding parts as in the first embodiment are provided with the same reference numerals as in the first embodiment. For the sake of simplicity, only the differences between the second embodiment and the first embodiment will be described. The difference is that the transmission mechanism comprises a gear 44 and a rack 45, the gear 44 is connected with the driving part 41, the rack 45 extends along a first direction, and the balancing stand 3 is rotatably connected with the rack 45. In the rotating process, the gear 44 can push the rack 45 to move, and the rack 45 drives the side part of the balancing stand 3 to change the position. The meshing of the gear 44 and the rack 45 has a locking effect, so that the transmission is more stable.

When the height of the mower disc 21 needs to be adjusted, the two gears 44 are synchronously adjusted, so that the two racks 45 are located at the same position along the first direction, that is, the two racks 45 are symmetrical with respect to the rotating shaft 31 of the balancing stand 3, at this time, there is no height difference between the two sides of the balancing stand 3, that is, the balancing stand 3 moves linearly along the first direction, the rotating shaft 31 slides along the sliding groove 121, and the height of the mower disc 21 is adjusted.

When the angle of the mower deck 21 needs to be adjusted, the two gears 44 are adjusted, so that a height difference occurs between the positions of the two racks 45 in the first direction, at this time, one gear 44 may rotate, the other gear 44 does not move, or both gears 44 may rotate, but the rotations are not synchronous, for example, the directions or the speeds are different, and these may be set according to actual needs. After the height difference of the two racks 45 occurs along the first direction, the balance frame 3 is enabled to rotate around the rotating shaft 31, so as to drive the mowing cutter disc 21 to rotate, and the angle of the mowing cutter disc 21 is adjusted. Here, the two racks 45 having a height difference in the first direction means that a height difference occurs between the two racks 45 and the rotational connection point of the balance frame 3.

In order to make the rack 45 move stably, a guide rail is arranged on the support seat 1, and the rack 45 is connected with the guide rail in a sliding manner. Due to the self-locking effect of the gear 44 and the rack 45, elastic connection between the balance frame 3 and the supporting seat 1 is not needed at the moment. Because the balancing stand 3 is rotatably connected with the rack 45, in order to ensure the stable rotation, the balancing stand 3 is elastically connected with the rack 45, namely, the spring 5 is arranged between the balancing stand 3 and the rack 45.

Of course, besides the cam 42 mechanism and the gear 44 and rack 45 mechanism mentioned in the above embodiments, the transmission mechanism may also be a worm and gear mechanism, a screw and nut mechanism, a pneumatic hydraulic lifting mechanism, etc., and will not be described herein again.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a lawn mower, including the machine main part, with machine main part fixed connection's supporting seat (1) with set up in lawn mower dish (21) on supporting seat (1), its characterized in that still includes:

the balance frame (3) is provided with a middle part and two side parts, the middle part of the balance frame (3) is rotatably connected with the supporting seat (1), the balance frame (3) can linearly move along a first direction relative to the supporting seat (1), and the mowing cutter head (21) is connected with the balance frame (3); a lever mechanism is formed between the balance frame (3) and the supporting seat (1);

two adjusting device (4), be fixed in on supporting seat (1), every lateral part of balancing stand (3) sets up one adjusting device (4), adjusting device (4) can adjust two lateral parts of balancing stand (3) are followed the relative position of first direction drives balancing stand (3) for supporting seat (1) removes and the swing.

2. The mower according to claim 1, wherein a rotating shaft (31) is disposed in the middle of the balancing stand (3), a sliding groove (121) extending along the first direction is formed in the supporting base (1), and the rotating shaft (31) is inserted into the sliding groove (121).

3. A lawnmower according to claim 2, wherein the two adjusting devices (4) are arranged symmetrically on either side of the shaft (31).

4. A mower as claimed in claim 1, characterized in that said adjusting device (4) comprises a drive (41) and a transmission connected to the output of said drive (41), said transmission being rotatably connected to said balancing frame (3).

5. A mower as claimed in claim 4, characterized in that said transmission mechanism comprises a cam (42) and a roller (43), said cam (42) being connected to said driving portion (41), said roller (43) being rotatably arranged on said balancing stand (3).

6. A mower as claimed in claim 5, wherein said balancing stand (3) is elastically connected to said support base (1).

7. A mower as claimed in claim 4, wherein said transmission comprises a gear (44) and a rack (45), said gear (44) being connected to said drive (41), said rack (45) extending in said first direction, said balancing stand (3) being in rotational connection with said rack (45).

8. A mower as claimed in claim 7, wherein said balancing stand (3) is elastically connected to said rack (45).

9. A mower as claimed in any one of claims 1 to 8 wherein said support base (1) comprises a housing (11) and a lever (12) connected to said housing (11), said balance (3) being rotatably connected to said lever (12), said mower deck (21) being located within said housing (11), said mower deck (21) being mounted on an arbor (22), said arbor (22) extending through said housing (11) for rotatable connection to said balance (3).

10. A lawnmower as claimed in claim 9, further comprising a reduction mechanism (24) connected to the arbor (22) and an electric motor (23) connected to the reduction mechanism (24), the electric motor (23) and the reduction mechanism (24) both being provided on the gimbal (3).