Rotary cutting type mower

Abstract

The invention relates to the technical field of weeding, in particular to a rotary cutting type mower which comprises a support plate, an adjusting mechanism and an adjusting unit. According to the cutting device, the adjusting unit works, so that the cutting inclination angle of the cutting tool is adaptively adjusted when the cutting tool deals with different terrains, the problem that the cutting tool is damaged due to the fact that the cutting tool collides with the ground is solved, and the service life of the cutting tool is prolonged; secondly, the cutting positions of the cutting tools are adjusted through an adjusting mechanism, so that the two cutting tools are suitable for cutting grassland with different heights at the same time, when the two cutting tools cut trees or weeds around stones, the two cutting tools avoid the trees during cutting, and the cutting efficiency is improved; and the cutting tool is protected, and the cutting tool is prevented from being damaged due to collision between the cutting tool and stones or trees.

Description

Technical Field

[0001] The present invention relates to the technical field of weeding, and in particular to a rotary lawn mower. Background Art

[0002] A lawn mower is a mechanical device specially used to trim lawns, grass and other vegetation. Lawn mowers can be divided into many types. Among them, rotary mowers are widely used in mowing in complex environments due to their versatility, durability and adaptability. Rotary mowers use a rotating blade to cut grass plants. They are suitable for rougher grass or bushes and can handle taller weeds or bushes.

[0003] The existing rotary mower is mainly composed of one or more horizontally mounted rotary cutter discs, each of which is equipped with a blade. The engine drives the cutter disc to drive the blade to rotate and cut grass or other vegetation.

[0004] The above-mentioned rotary cutter lawn mower has the following shortcomings: 1. The rotary cutter disc of the above-mentioned rotary cutter lawn mower is relatively fixed, so that when the lawn mower is working and responds to the ground protrusion or depression on the cutting path, the cutting angle of the cutting tool cannot be adjusted independently, and the staff needs to control the cutting inclination angle of the lawn mower. If the cutting inclination angle of the cutting tool is not adjusted in time, it is easy to collide with the protruding ground during the cutting process, resulting in damage to the cutting tool.

[0005] 2. The above-mentioned rotary mower is rather cumbersome to clean weeds around stones and trees, and the staff needs to control the cutting tool to avoid trees and stones. If the cutting tool fails to avoid trees and stones in time, the cutting tool is prone to collision with stones or trees, resulting in damage to the cutting tool. Summary of the invention

[0006] Based on this, it is necessary to provide a rotary lawn mower to solve the above technical problems.

[0007] The present application provides a rotary-cutting lawn mower, comprising: a bracket plate, a support column fixedly penetrated through the right side portion of the bracket plate, a connecting column fixedly penetrated through the support column, a rotating wheel rotatably provided on both front and rear end surfaces of the connecting column, a vertical bar fixedly provided on the lower end surface of the bracket plate, a support wheel located on the left side of the rotating wheel rotatably provided on the vertical bar, an upper section of the support column rotatably provided with two rotating plates symmetrically distributed front and back through a sleeve, a rotating bar 1 rotatably provided on opposite back surfaces of the two rotating plates, and a cutting tool provided below the rotating bar 1.

[0008] The bracket plate is provided with an adjustment mechanism for preliminary adjustment of the height of the cutting tool, and the placement plate is provided with an adjustment unit for adjusting the cutting angle of the cutting tool. The adjustment unit includes an adjustment group 2 for adjusting the cutting inclination angle of the cutting tool. The upper end surface of the bracket plate is provided with a pushing handle through two front-to-back symmetrical L-shaped strips.

[0009] The adjustment mechanism includes a slide groove, and the left section of the bracket plate is penetrated by two slide grooves symmetrically distributed front and back. The slide groove and the corresponding rotating bar are jointly provided with an adjustment group, an arc bar is provided above the cutting tool, and a pushing group for pushing the two cutting tools away from each other is provided on the bracket plate.

[0010] According to a favorable embodiment, the adjustment group 1 includes a slider, a slider is slidably arranged in the slide groove, a sliding rod with an axis extending from top to bottom slides through the slider, a universal wheel is arranged on the lower end face of the sliding rod, a fixing ring located below the bracket plate is fixedly sleeved on the sliding rod, and a spring 1 sleeved on the corresponding sliding rod is fixedly arranged between the fixing ring and the slider.

[0011] According to a favorable embodiment, a sliding groove extending along the length direction of the rotating bar 1 is formed through the upper end surface of the rotating bar 1, a rectangular block is rotatably provided on the upper end surface of the sliding rod, and the rectangular block is located in the sliding groove, matching grooves are formed on the front and rear side surfaces of the rotating bar 1, and fixing columns located in the corresponding matching grooves are fixedly provided on the front and rear end surfaces of the rectangular block.

[0012] According to a favorable embodiment, a rotating bar 2 is hinged between the rotating plate and the connecting bar and is located above the corresponding rotating bar 1. The length of the rotating bar 2 is equal to that of the rotating bar 1 and the two are parallel to each other. The connecting bar is hinged on the side of the rotating bar 1 away from the supporting column. A U-shaped plate with an opening facing downward is fixedly provided on the lower end face of the connecting bar. Two vertical sections of the U-shaped plate are hinged to a placement plate through the connecting plate. A cutting tool is provided on the lower end face of the placement plate through rotation of a rotating shaft.

[0013] According to a favorable embodiment, the upper end surface of the bracket plate is slidably provided with a horizontal bar located between two sliding grooves, the left end surface of the horizontal bar is fixedly provided with an arc-shaped bar, the right end surface of the horizontal bar is fixedly provided with a transverse bar extending from front to back, the right end surface of the transverse bar is fixedly provided with two transverse rods symmetrically distributed front and back, the right end surface of the transverse rod is fixedly provided with a circular plate 1, the upper end surface of the bracket plate is fixedly provided with two fixed blocks symmetrically distributed front and back and mounted on the corresponding transverse rods, and a spring 2 mounted on the corresponding transverse rod is fixedly provided between the circular plate 1 and the fixed block.

[0014] According to a favorable embodiment, the adjustment mechanism also includes a pushing group, which includes a moving groove. The front and rear sides of the horizontal bar are both provided with moving grooves, and a moving block is slidably arranged in the moving groove. The moving block and the corresponding side sliding rod are jointly hinged with a pushing bar.

[0015] According to a favorable embodiment, the left end face of the transverse bar is provided with two positioning groups which are symmetrically distributed front to back and are used to limit the position of the sliding rod. The positioning group is composed of two limiting strips which are symmetrically distributed front to back. The left end face of the transverse bar is fixedly provided with a limiting strip. The limiting strip is divided into an inclined section and a transverse section from left to right. The inclined sections of the two limiting strips in the same positioning group are close to each other from left to right.

[0016] According to a favorable embodiment, the second adjustment group includes a fixing bar, a fixing bar is fixedly provided on the left end face of the horizontal section of the U-shaped plate, a vertical rod is slidably penetrated by the fixing bar away from the U-shaped bar, a universal wheel is provided on the lower end face of the vertical rod, a circular plate 2 is fixedly provided on the upper end face of the vertical rod, a spring 3 which is sleeved on the corresponding vertical rod is fixedly provided between the circular plate 2 and the fixing bar, and the front adjustment unit is taken as an example for explanation, a placement groove is provided on the front sections of the two vertical rods, a sliding block is slidably provided in the placement groove, a pushing rod is fixedly provided on the end faces of the two sliding blocks which are away from each other, a pushing plate is fixedly provided on the placement plate, a pushing block is slidably provided on the pushing plate, and the pushing block is rotatably sleeved on the corresponding pushing rod.

[0017] According to a preferred embodiment, the U-shaped plate and the corresponding connecting plate are jointly provided with a locking group, and the locking group includes a downward pressure rod, a downward pressure rod is slidably provided on the upper end surface of the horizontal section of the U-shaped plate, a downward pressure plate is fixedly provided on the upper end surface of the downward pressure rod, a spring four mounted on the corresponding downward pressure rod is jointly fixedly provided between the downward pressure plate and the U-shaped plate, a positioning strip is fixedly provided on the lower end surface of the downward pressure plate, and a positioning groove which cooperates with the positioning strip is opened on the connecting plate.

[0018] According to a favorable embodiment, a transmission group is commonly provided on the vertical rod and the fixed bar, and the transmission group includes a transmission bar, and a transmission bar is slidably provided on the fixed bar to the left and right, and the transmission bar is two inclined sections symmetrically distributed on the left and right, and a short straight line section is commonly connected between the two inclined sections, and a long straight line section is commonly provided at one end of the two inclined sections that are far away from each other, and the long straight line section close to the fixed bar is slidably connected to the fixed bar, and a transmission column is fixedly provided on the end face of the positioning bar close to the U-shaped plate, and a hinged bar is commonly hinged between the vertical rod and the transmission bar.

[0019] In summary, the present invention includes at least one of the following beneficial effects: in the present invention, the adjustment unit works so that when the cutting tool copes with different terrains, the cutting inclination angle of the cutting tool is adaptively adjusted to avoid the problem of the cutting tool being damaged due to collision with the ground, thereby improving the service life of the cutting tool; secondly, in the present invention, the cutting position of the cutting tool is adjusted by the adjustment mechanism, so that the two cutting tools are suitable for cutting grasses of different heights at the same time, and when the two cutting tools cut the weeds around trees or stones, the two cutting tools avoid the trees during cutting, protect the cutting tools, and avoid damage to the cutting tools caused by collision with stones or trees. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0021] Figure 1 A structural schematic diagram of a rotary lawn mower provided according to an embodiment of the present invention is shown.

[0022] Figure 2 A three-dimensional structural schematic diagram of an adjustment mechanism provided according to an embodiment of the present invention is shown.

[0023] Figure 3 A schematic diagram of some components of a rotating bar 1, a pushing group and an adjusting group 1 provided according to an embodiment of the present invention is shown.

[0024] Figure 4 A schematic diagram of the three-dimensional structure of some components of a cutting tool and an adjustment unit provided according to an embodiment of the present invention is shown.

[0025] Figure 5 A three-dimensional structural schematic diagram of some components of a cutting tool, a positioning group and a transmission group provided according to an embodiment of the present invention is shown.

[0026] Figure 6 The embodiment of the present invention provides Figure 5 A magnified view of the structure in the middle.

[0027] The above drawings include the following reference numerals:

[0028] 1. Bracket plate; 2. Support column; 20. Connecting column; 21. Rotating wheel; 22. Support wheel; 3. Rotating plate; 31. Rotating bar 1; 310. Rotating bar 2; 32. Connecting bar; 33. Placement plate; 330. Connecting plate; 331. U-shaped plate; 34. Push handle; 4. Cutting tool; 5. Adjustment mechanism; 50. Slide; 51. Adjustment group 1; 510. Sliding block; 511. Sliding rod; 512. Universal wheel; 513. Fixed ring; 514. Spring 1; 515. Sliding groove; 516. Rectangular block; 517. Fixed column; 52. Pushing group; 520. Moving groove; 521. Moving block; 522. Pushing Moving bar; 53, arc-shaped bar; 54, horizontal bar; 540, transverse bar; 541, transverse rod; 542, fixed block; 543, spring two; 55, positioning group; 550, limit bar; 6, adjustment unit; 60, adjustment group two; 600, fixed bar; 601, vertical rod; 602, spring three; 603, sliding block; 604, push rod; 605, push plate; 606, push block; 61, locking group; 610, lower pressure rod; 611, lower pressure plate; 612, spring four; 613, positioning bar; 614, positioning groove; 62, transmission group; 620, transmission bar; 621, transmission column; 622, hinged bar. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0030] like Figure 1 , Figure 2 and Figure 5 As shown, a rotary cutting lawn mower comprises: a bracket plate 1, a support column 2 is fixedly penetrated on the right part of the bracket plate 1, a connecting column 20 located at the lower side of the bracket plate 1 is fixedly penetrated on the support column 2, a rotating wheel 21 is rotatably provided on the front and rear end surfaces of the connecting column 20, a vertical bar is fixedly provided on the lower end surface of the bracket plate 1, a supporting wheel 22 located on the left side of the rotating wheel 21 is rotatably provided on the vertical bar, and two rotating plates 3 symmetrically distributed front and back are rotatably provided on the upper part of the support column 2 through a sleeve, and rotating bars 31 are rotatably provided on the opposite back surfaces of the two rotating plates 3, and a connecting bar 32 is hinged on the side of the rotating bar 31 away from the support column 2, and a U-shaped plate 331 with an opening facing downward is fixedly provided on the lower end surface of the connecting bar 32, and two vertical sections of the U-shaped plate 331 are jointly hinged with a placing plate 33 through a connecting plate 330, and a cutting tool 4 is rotatably provided on the lower end surface of the placing plate 33 through a rotating shaft, and the rotating shaft is connected to a motor.

[0031] like Figure 1 and Figure 2 As shown, the bracket plate 1 is provided with an adjustment mechanism 5 for preliminarily adjusting the height of the cutting tool 4, and the adjustment mechanism 5 includes a slide groove 50. The left section of the bracket plate 1 is penetrated by two slide grooves 50 that are symmetrically distributed front and back. The slide groove 50 and the corresponding rotating bar 31 are jointly provided with an adjustment group 51. An arc bar 53 is provided above the cutting tool 4, and the upper end surface of the bracket plate 1 is provided with a pushing handle 34 through two L-shaped bars that are symmetrical front and back.

[0032] like Figure 2 and Figure 3 As shown, the adjustment group 51 includes a slider 510, and the slider 510 is slidably arranged in the slide groove 50. A sliding rod 511 with an axis extending from top to bottom slides through the slider 510, and a universal wheel 512 is arranged on the lower end surface of the sliding rod 511. A fixing ring 513 located below the bracket plate 1 is fixedly sleeved on the sliding rod 511, and a spring 514 sleeved on the corresponding sliding rod 511 is fixedly arranged between the fixing ring 513 and the slider 510.

[0033] like Figure 2 and Figure 3 As shown, the upper end surface of the rotating bar 31 is penetrated by a sliding groove 515 extending along the length direction of the rotating bar 31, the upper end surface of the sliding rod 511 is rotatably provided with a rectangular block 516, and the rectangular block 516 is located in the sliding groove 515, the front and rear side surfaces of the rotating bar 31 are provided with matching grooves, the front and rear end surfaces of the rectangular block 516 are fixedly provided with fixing columns 517 located in the corresponding matching grooves, and the rotating plate 3 and the connecting bar 32 are hingedly connected with a rotating bar 2 310 located above the corresponding rotating bar 1 31, the length of the rotating bar 2 310 is equal to that of the rotating bar 1 31 and the two are parallel to each other.

[0034] When the universal wheel 512 on the sliding rod 511 is not in contact with the ground, the corresponding universal wheel 512 is located below the supporting wheel 22. When the universal wheel 512 on the sliding rod 511 is in contact with the ground and flush with the supporting wheel 22, the spring 1 514 is compressed and deformed. The elastic force generated by the deformation of the spring 1 514 acts on the sliding rod 511 through the fixing ring 513, and pushes the universal wheel 512 close to the ground through the sliding rod 511. When working, the staff pushes the bracket plate 1 to move by pushing the handle 34, and the bracket plate 1 drives the sliding rod 511 and the universal wheel 512 to move synchronously through the slider 510. When the height of the ground on one side is higher than the height of the ground at the contact position with the supporting wheel 22, the ground pushes the sliding rod 511 to move upward through the corresponding universal wheel 512, and the corresponding spring 1 514 is continuously compressed and deformed. The sliding rod 511 pushes the torque The rectangular block 516 moves upward synchronously, and the rectangular block 516 pushes the left end of the rotating bar 31 to deflect upward through the fixed column 517. At this time, the rectangular block 516 is located in the corresponding sliding groove 515 and slides relative to the left to avoid the sliding rod 511 and the rotating bar 31 from getting stuck with each other. The rotating bar 31 drives the corresponding connecting bar 32 to move upward synchronously. Through the parallelogram structure formed by the rotating bar 1 31, the rotating bar 2 310, the rotating plate 3 and the connecting bar 32, the connecting bar 32 is always parallel to the axis of the support column 2 when it deflects upward, so that the cutting tool 4 is always parallel to the ground when cutting the grass. The connecting bar 32 deflects upward and drives the corresponding placement plate 33 to deflect upward. The placement plate 33 drives the cutting tool 4 to deflect synchronously through the rotating shaft, thereby adjusting the cutting height of the cutting tool 4.

[0035] It should be noted that during the above adjustment process, if the ground height on the corresponding side is lower than the ground height at the contact position with the support wheel 22, the elastic force generated by the deformation of the spring 1 514 makes the universal wheel 512 always close to the ground, and the rotating bar 1 31 drives the corresponding cutting tool 4 to move downward. At this time, the rectangular block 516 is located in the corresponding sliding groove 515 and slides relative to the right.

[0036] like Figure 2 As shown, the upper end surface of the bracket plate 1 is slidably provided with a horizontal bar 54 located between the two slide grooves 50, the left end surface of the horizontal bar 54 is fixedly provided with an arc-shaped bar 53, the right end surface of the horizontal bar 54 is fixedly provided with a transverse bar 540 extending from front to back, the right end surface of the transverse bar 540 is fixedly provided with two transverse rods 541 symmetrically distributed front and back, the right end surface of the transverse rod 541 is fixedly provided with a circular plate 1, the upper end surface of the bracket plate 1 is fixedly provided with two fixed blocks 542 symmetrically distributed front and back and sleeved on the corresponding transverse rods 541, and a spring 2 543 sleeved on the corresponding transverse rod 541 is fixedly provided between the circular plate 1 and the fixed block 542.

[0037] like Figure 2 and Figure 3 As shown, the adjustment mechanism 5 also includes a pushing group 52, and the pushing group 52 includes a moving groove 520. The front and rear sides of the horizontal bar 54 are both provided with a moving groove 520. A moving block 521 is slidably arranged in the moving groove 520, and a pushing bar 522 is hinged between the moving block 521 and the corresponding side sliding rod 511.

[0038] like Figure 2 and Figure 3 As shown, the left end face of the transverse bar 540 is provided with two positioning groups 55 which are symmetrically distributed front to back and are used to limit the position of the sliding rod 511. The positioning group 55 is composed of two limiting bars 550 which are symmetrically distributed front to back. The left end face of the transverse bar 540 is fixedly provided with the limiting bar 550. The limiting bar 550 is divided into an inclined section and a transverse section from left to right. The inclined sections of the two limiting bars 550 in the same positioning group 55 are close to each other from left to right.

[0039] When the cutting tool 4 is in the process of being cut, the two cutting tools 4 cannot cut the weeds in the middle area between them.

[0040] When the movable block 521 is in the right side of the corresponding movable groove 520, the limit of the sliding rod 511 is released, and the bracket plate 1 continues to move to the left, and the horizontal bar 54 moves to the right relatively. In this process, the movable block 521 moves from the right side of the movable groove 520 to the left side, until the movable block 521 slides to contact the left inner wall of the movable groove 520, and the positioning group 55 releases the limit of the sliding rod 511, and the bracket plate 1 and the horizontal bar 540 continue to move relative to each other, and the positioning group 55 and the sliding rod 511 are relatively far away from each other. At this time, the two push bars 522 and the ends connected to the corresponding sliding rods 511 move away from each other, pushing the sliding rod 511 to move along the sliding groove 50 in the direction away from the horizontal bar 54, and the sliding rod 511 drives the corresponding rotating bar 31 to rotate around through the rectangular block 516. The axis of the support column 2 rotates synchronously, and the rotating bar 31 drives the U-shaped plate 331 to move synchronously through the connecting bar 32. The U-shaped plate 331 drives the corresponding placement plate 33 to move synchronously through the connecting plate 330. In the process of the moving block 521 moving from the left side of the sliding rod 511 to the same straight line as the two sliding rods 511, the two cutting tools 4 move away from each other while moving to the left, avoiding the trees on the left side of the two cutting tools 4 to prevent the cutting tools 4 from contacting the trees and causing damage to the cutting tools 4. The bracket plate 1 continues to move left. After the sliding rod 511 is located on the left side of the moving block 521, the pushing bar 522 pulls the corresponding sliding rod 511 to move in the direction close to the horizontal bar 54, thereby making the two cutting tools 4 approach each other during the process of moving to the left.

[0041] It should be noted that the length of the slide slot 50 is greater than the length of the push bar 522 .

[0042] After the arc strip 53 is fitted with the tree, the two cutting tools 4 are moved away from each other and then closer to each other during the leftward movement through the pushing group 52, so that the cutting tools 4 cut the weeds around the tree along an arc trajectory, avoiding damage caused by the cutting tools 4 colliding with the tree during operation.

[0043] like Figure 1 , Figure 4 and Figure 5As shown, the placement plate 33 is provided with an adjustment unit 6 for adjusting the cutting angle of the cutting tool 4, and the adjustment unit 6 includes an adjustment group 2 60. The placement plate 33 and the U-shaped plate 331 are jointly provided with an adjustment group 2 60, and the adjustment group 2 60 includes a fixing bar 600, and the left end surface of the horizontal section of the U-shaped plate 331 is fixedly provided with a fixing bar 600, and the fixing bar 600 is slidably penetrated by a vertical rod 601 away from the side of the U-shaped bar, and the lower end surface of the vertical rod 601 is provided with a universal wheel 512, and the upper end surface of the vertical rod 601 is fixedly provided with a Circular plate 2, a spring 3 602 is fixedly arranged between circular plate 2 and the fixing bar 600 and is sleeved on the corresponding vertical rod 601. Taking the front adjustment unit 6 as an example, a placement groove is opened in the front section of the two vertical rods 601, and a sliding block 603 is slidably arranged in the placement groove. The end surfaces of the two sliding blocks 603 that are away from each other are fixedly provided with a pushing rod 604. A pushing plate 605 is fixedly arranged on the placement plate 33, and a pushing block 606 is slidably arranged on the pushing plate 605, and the pushing block 606 is rotatably sleeved on the corresponding pushing rod 604.

[0044] like Figure 4 , Figure 5 and Figure 6 As shown, the U-shaped plate 331 and the corresponding connecting plate 330 are jointly provided with a locking group 61, and the locking group 61 includes a lower pressure rod 610, and the upper end surface of the horizontal section of the U-shaped plate 331 is slidably provided with the lower pressure rod 610, and the upper end surface of the lower pressure rod 610 is fixedly provided with a lower pressure plate 611, and a spring 612 mounted on the corresponding lower pressure rod 610 is jointly fixedly provided between the lower pressure plate 611 and the U-shaped plate 331, and a positioning strip 613 is fixedly provided on the lower end surface of the lower pressure plate 611, and a positioning groove 614 which cooperates with the positioning strip 613 is opened on the connecting plate 330.

[0045] like Figure 4 , Figure 5 and Figure 6 As shown, the vertical rod 601 and the fixed bar 600 are jointly provided with a transmission group 62, and the transmission group 62 includes a transmission bar 620. The fixed bar 600 is provided with a transmission bar 620 for sliding left and right. The transmission bar 620 is two inclined sections symmetrically distributed left and right, and a short straight line section is commonly connected between the two inclined sections. A long straight line section is arranged at one end of the two inclined sections away from each other, and the long straight line section close to the fixed bar 600 is slidably connected to the fixed bar 600. A transmission column 621 is fixedly arranged on the end face of the positioning bar 613 close to the U-shaped plate 331, and a hinged bar 622 is commonly hinged between the vertical rod 601 and the transmission bar 620.

[0046] When the universal wheel 512 on the vertical rod 601 is not in contact with the ground, the corresponding universal wheel 512 is located below the support wheel 22. In the initial state, the transmission column 621 is in contact with the short straight section of the transmission bar 620, the positioning bar 613 is located in the positioning groove 614, the U-shaped plate 331 and the connecting plate 330 are in a locked state, and the sliding block 603 is located in the middle area of ​​the placement groove (see Figure 5 ), the universal wheel 512 on the vertical rod 601 is close to the ground, and the spring 3 602 is stretched and deformed (see Figure 4 When the workpiece is in working state, the staff pushes the bracket plate 1 to move to the left by pushing the handle 34. If there is a downwardly concave pit on the left side of the cutting tool 4, the elastic force generated by the deformation of the spring three 602 pushes the universal wheel 512 thereon to move downward through the vertical rod 601. The universal wheel 512 moves downward and is close to the inner wall of the pit. During the downward movement of the vertical rod 601, the hinged bar 622 pulls the transmission bar 620 to move in the direction close to the vertical rod 601. The transmission bar 620 moves to its right inclined section and contacts the transmission column 621. Through the cooperation between the inclined section of the transmission bar 620 and the transmission column 621, the transmission bar 620 pushes the positioning bar 613 to move upward. The spring four 612 is stretched and deformed. After the transmission column 621 moves and contacts with the long horizontal section on the right side of the transmission bar 620, the U-shaped plate 331 and the connecting plate 330 are completed. The vertical rod 601 is unlocked, and the vertical rod 601 moves downward to the upper inner wall of the placement groove and contacts the sliding block 603. Then the vertical rod 601 drives the sliding block 603 to continue to move downward synchronously. The sliding block 603 pushes the pushing block 606 downward through the pushing rod 604 and moves downward synchronously. The pushing block 606 presses the pushing plate 605 downward, so that the placement plate 33 rotates around the hinge point between the U-shaped plate 331 and the connecting plate 330. The placement plate 33 drives the cutting tool 4 to deflect downward, thereby realizing adaptive adjustment of the cutting angle of the cutting tool 4. During the rotation of the cutting tool 4, the angle of the pushing block 606 deflects synchronously with the cutting tool 4, so that the pushing block 606 rotates relative to the pushing rod 604. At the same time, due to the deflection of the pushing plate 605, the pushing block 606 and the pushing plate 605 slide relative to each other, thereby avoiding the adjustment unit 6 from getting stuck.

[0047] It should be noted that when there is a raised ground on the left side of the cutting tool 4, the bracket plate 1 continues to move to the left. When the universal wheel 512 at the bottom of the vertical rod 601 contacts the raised ground, the transmission column 621 will contact the inclined section on the left side of the transmission bar 620 due to the blocking effect of the raised ground. After that, the U-shaped plate 331 and the connecting plate 330 are unlocked, and the push rod 604 pulls the push plate 605 upward to deflect the cutting tool 4 upward.

[0048] During specific work, the staff pushes the support plate 1 to move by pushing the handle 34. During the movement of the support plate 1, the adjustment group 1 51 works to adaptively adjust the cutting height of the cutting tool 4, so that the two cutting tools 4 are suitable for cutting grasses at different heights on both sides of the support wheel 22, avoiding the problem of unequal grass heights on both sides after cutting. When cutting downward concave and upward convex grasses, the transmission group 62 works to unlock the locking group 61, and adjusts the cutting angle of the cutting tool 4 through the adjustment group 2 60 during the movement and cutting process of the cutting tool 4, so that the cutting angle of the cutting tool 4 is adaptively adjusted, avoiding the problem of damage to the cutting tool 4 due to collision with the raised ground due to the cutting angle of the cutting tool 4 not changing during the cutting process. When cutting the grass around the trees, the pushing group 52 works to make the cutting tool 4 move to both sides of the trees to avoid the trees while moving and cutting, avoiding damage to the cutting tool 4.

[0049] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0050] In addition, the terms "first", "second", "number one", "number two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "number one", "number two" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0051] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rotary lawn mower, characterized in that: include: A support plate (1), wherein a support column (2) is fixedly passed through the right side of the support plate (1), a connecting column (20) located at the lower side of the support plate (1) is fixedly passed through the support column (2), a rotating wheel (21) is rotatably provided on both front and rear end faces of the connecting column (20), a vertical bar is fixedly provided on the lower end face of the support plate (1), a supporting wheel (22) located at the left side of the rotating wheel (21) is rotatably provided on the vertical bar, and two rotating plates (3) symmetrically distributed front and back are rotatably provided on the upper section of the support column (2) through a sleeve, and rotating bars (31) are rotatably provided on opposite sides of the two rotating plates (3), and a cutting tool (4) is provided below the rotating bar (31); The support plate (1) is provided with an adjustment mechanism (5) for preliminarily adjusting the height of the cutting tool (4); the placement plate (33) is provided with an adjustment unit (6) for adjusting the cutting angle of the cutting tool (4); the adjustment unit (6) includes an adjustment group 2 (60) for adjusting the cutting inclination angle of the cutting tool (4); and the upper end surface of the support plate (1) is provided with a pushing handle (34) through two front-to-back symmetrical L-shaped strips. The adjustment mechanism (5) comprises a slide groove (50), and the left section of the support plate (1) is provided with two slide grooves (50) symmetrically distributed front and back, and the slide groove (50) and the corresponding rotating bar (31) are jointly provided with an adjustment group (51), an arc bar (53) is provided above the cutting tool (4), and a pushing group (52) for pushing the two cutting tools (4) away from each other is provided on the support plate (1).

2. The rotary mower according to claim 1, characterized in that: The adjustment group (51) comprises a slider (510), the slider (510) is slidably arranged in the slide groove (50), a sliding rod (511) with an axis extending from top to bottom is slidably passed through the slider (510), a universal wheel (512) is arranged on the lower end surface of the sliding rod (511), a fixing ring (513) located below the bracket plate (1) is fixedly sleeved on the sliding rod (511), and a spring (514) sleeved on the corresponding sliding rod (511) is fixedly arranged between the fixing ring (513) and the slider (510).

3. A rotary mower according to claim 2, characterized in that: The upper end surface of the rotating bar (31) is penetrated by a sliding groove (515) extending along the length direction of the rotating bar (31); the upper end surface of the sliding rod (511) is rotatably provided with a rectangular block (516), and the rectangular block (516) is located in the sliding groove (515); the front and rear side surfaces of the rotating bar (31) are both provided with matching grooves, and the front and rear end surfaces of the rectangular block (516) are both fixedly provided with fixing columns (517) located in the corresponding matching grooves.

4. The rotary mower according to claim 1, characterized in that: A second rotating bar (310) located above the corresponding first rotating bar (31) is hingedly connected between the rotating plate (3) and the connecting bar (32); the length of the second rotating bar (310) is equal to that of the first rotating bar (31) and the two are parallel to each other; a connecting bar (32) is hingedly connected to the side of the first rotating bar (31) away from the support column (2); a U-shaped plate (331) with an opening facing downward is fixedly arranged on the lower end surface of the connecting bar (32); two vertical sections of the U-shaped plate (331) are hingedly connected to a placement plate (33) through the connecting plate (330); and a cutting tool (4) is rotatably arranged on the lower end surface of the placement plate (33) through a rotating shaft.

5. The rotary mower according to claim 1, characterized in that: The upper end surface of the support plate (1) is provided with a horizontal bar (54) located between two slide grooves (50) for sliding left and right, the left end surface of the horizontal bar (54) is fixedly provided with an arc bar (53), the right end surface of the horizontal bar (54) is fixedly provided with a transverse bar (540) extending from front to back, the right end surface of the transverse bar (540) is fixedly provided with two transverse rods (541) symmetrically distributed front and back, the right end surface of the transverse rod (541) is fixedly provided with a circular plate 1, the upper end surface of the support plate (1) is fixedly provided with two fixed blocks (542) symmetrically distributed front and back and sleeved on the corresponding transverse rods (541), and a spring 2 (543) sleeved on the corresponding transverse rod (541) is fixedly provided between the circular plate 1 and the fixed block (542).

6. The rotary mower according to claim 5, characterized in that: The adjustment mechanism (5) further comprises a pushing group (52), the pushing group (52) comprising a moving groove (520), the front and rear sides of the horizontal bar (54) are both provided with a moving groove (520), a moving block (521) is slidably arranged in the moving groove (520), and a pushing bar (522) is hingedly connected between the moving block (521) and the corresponding side sliding rod (511).

7. The rotary mower according to claim 5, characterized in that: The left end surface of the transverse bar (540) is provided with two positioning groups (55) which are symmetrically distributed front and back and are used to limit the position of the sliding rod (511). The positioning group (55) is composed of two limiting bars (550) which are symmetrically distributed front and back. The limiting bar (550) is fixedly provided on the left end surface of the transverse bar (540). The limiting bar (550) is divided into an inclined section and a transverse section from left to right. The inclined sections of the two limiting bars (550) in the same positioning group (55) are close to each other from left to right.

8. The rotary mower according to claim 4, characterized in that: The second adjustment group (60) comprises a fixing bar (600), the left end surface of the horizontal section of the U-shaped plate (331) is fixedly provided with the fixing bar (600), a vertical rod (601) is slidably penetrated through the fixing bar (600) away from the U-shaped bar, a universal wheel (512) is provided on the lower end surface of the vertical rod (601), a circular plate (2) is fixedly provided on the upper end surface of the vertical rod (601), and a spring (3) which is sleeved on the corresponding vertical rod (601) is fixedly provided between the circular plate (2) and the fixing bar (600). (602), taking the front adjustment unit (6) as an example, a placement groove is provided at the front section of the two vertical rods (601), a sliding block (603) is slidably arranged in the placement groove, and a push rod (604) is fixedly arranged on the end surfaces of the two sliding blocks (603) away from each other, a push plate (605) is fixedly arranged on the placement plate (33), a push block (606) is slidably arranged on the push plate (605), and the push block (606) is rotatably sleeved on the corresponding push rod (604).

9. The rotary mower according to claim 8, characterized in that: The U-shaped plate (331) and the corresponding connecting plate (330) are jointly provided with a locking group (61), and the locking group (61) includes a lower pressing rod (610), and the upper end surface of the horizontal section of the U-shaped plate (331) is slidably provided with a lower pressing rod (610), and the upper end surface of the lower pressing rod (610) is fixedly provided with a lower pressing plate (611), and a spring four (612) sleeved on the corresponding lower pressing rod (610) is jointly fixedly provided between the lower pressing plate (611) and the U-shaped plate (331), and a positioning strip (613) is fixedly provided on the lower end surface of the lower pressing plate (611), and a positioning groove (614) that cooperates with the positioning strip (613) is opened on the connecting plate (330).

10. The rotary mower according to claim 9, characterized in that: The vertical rod (601) and the fixed bar (600) are jointly provided with a transmission group (62), the transmission group (62) comprising a transmission bar (620), the fixed bar (600) is provided with a transmission bar (620) for sliding left and right, the transmission bar (620) is two inclined sections symmetrically distributed left and right, a short straight section is commonly connected between the two inclined sections, a long straight section is commonly provided at one end of the two inclined sections that are far away from each other, the long straight section close to the fixed bar (600) is slidably connected to the fixed bar (600), a transmission column (621) is fixedly provided on the end surface of the positioning bar (613) close to the U-shaped plate (331), and a hinge bar (622) is commonly hinged between the vertical rod (601) and the transmission bar (620).

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