A rotary cutting mower

Abstract

The present invention relates to the technical field of weeding, and specifically relates to a rotary cutting mower, which includes a support plate, an adjustment mechanism and an adjustment unit. In the present invention, through the operation of the adjustment unit, the cutting inclination angle of the cutting tool is adaptively adjusted when the cutting tool faces different terrains, avoiding the problem of damage to the cutting tool caused by the ground collision of the cutting tool, improving the service life of the cutting tool. Secondly, in the present invention, the cutting position of the cutting tool is adjusted through the adjustment mechanism, so that the two cutting tools are suitable for cutting grass at different heights simultaneously. And when the two cutting tools cut the weeds around trees or stones, the two cutting tools avoid the trees during cutting, protecting the cutting tools and avoiding damage to the cutting tools caused by collision with stones or trees.

Description

Technical Field

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

[0002] A mower is a mechanical device specifically used for trimming lawns, grasslands, and other vegetation. Mowers can be divided into various types. Among them, the rotary cutting mower is widely used in mowing work in complex environments due to its versatility, durability, and adaptability. The rotary cutting mower uses a rotating cutter head to cut grass plants, and is suitable for relatively rough grasslands or shrubs, and can handle taller weeds or shrubs.

[0003] The existing rotary cutting mower mainly consists of one or more horizontally installed rotating cutter heads. Each cutter head is equipped with blades, and the engine drives the cutter head to drive the blades to rotate and cut grass or other vegetation.

[0004] The above-mentioned rotary cutting mower has the following deficiencies: 1. The rotating cutter head of the above-mentioned rotary cutting mower is relatively fixed, so that when the mower encounters a ground protrusion or depression on the cutting path during operation, it cannot independently adjust the cutting angle of the cutting tool. The operator needs to control the cutting inclination angle of the mower. If the cutting inclination angle of the cutting tool fails to be adjusted in time, it is easy to damage the cutting tool due to collision with the protruding ground during the cutting process.

[0005] 2. When cleaning the weeds around stones and trees, the above-mentioned rotary cutting mower is rather cumbersome. The operator needs to control the cutting tool to avoid the trees and stones. If the cutting tool fails to avoid the trees and stones in time, it is easy to damage the cutting tool due to collision with the stones or trees. Summary of the Invention

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

[0007] The present application provides a rotary cutting mower, including: a support plate, a support column is fixedly penetrated through the right part of the support plate, a connecting column located below the support plate is fixedly penetrated through the support column, rotating wheels are rotatably arranged on the front and rear end faces of the connecting column, a vertical strip is fixedly arranged on the lower end face of the support plate, and a support wheel located on the left side of the rotating wheel is rotatably arranged on the vertical strip. The upper part of the support column is rotatably provided with two symmetrically distributed rotating plates through a sleeve, rotating bars I are rotatably arranged on the opposite surfaces of the two rotating plates, and a cutting tool is arranged below the rotating bar I.

[0008] An adjusting mechanism for preliminarily adjusting the height of the cutting tool is provided on the support plate, and an adjusting unit for adjusting the cutting angle of the cutting tool is provided on the placing plate. The adjusting unit includes an adjusting group two for adjusting the cutting inclination angle of the cutting tool. The upper end surface of the support plate is provided with a pushing handle through two symmetrically arranged L-shaped bars in the front and back directions.

[0009] The adjusting mechanism includes sliding grooves. Two symmetrically distributed sliding grooves in the front and back directions are penetrated through the left section of the support plate. An adjusting group one is jointly provided on the sliding grooves and the corresponding rotating bar one. An arc-shaped bar is arranged above the cutting tool. A pushing group for pushing the two cutting tools away from each other is provided on the support plate.

[0010] According to a preferred embodiment, the adjusting group one includes a slider. The slider is slidably arranged in the sliding groove. A sliding rod with an axis extending from top to bottom is slidably penetrated through the slider. A universal wheel is arranged on the lower end surface of the sliding rod. A fixed ring located below the support plate is fixedly sleeved on the sliding rod. A first spring sleeved on the corresponding sliding rod is jointly fixedly arranged between the fixed ring and the slider.

[0011] According to a preferred embodiment, a sliding groove extending along the length direction of the rotating bar one is penetrated through the upper end surface of the rotating bar one. A rectangular block is rotatably arranged on the upper end surface of the sliding rod, and the rectangular block is located in the sliding groove. Matching grooves are opened on the front and back side surfaces of the rotating bar one. Fixed columns located in the corresponding matching grooves are fixedly arranged on the front and back end surfaces of the rectangular block.

[0012] According to a preferred embodiment, a rotating bar two is hinged between the rotating plate and the connecting bar above the corresponding rotating bar one. The length of the rotating bar two is equal to that of the rotating bar one and the two are parallel to each other. A connecting bar is hinged on one side of the rotating bar one away from the support column. A U-shaped plate with an opening facing downwards is fixedly arranged on the lower end surface of the connecting bar. The two vertical sections of the U-shaped plate are jointly hinged with a placing plate through a connecting plate. A cutting tool is rotatably arranged on the lower end surface of the placing plate through a rotating shaft.

[0013] According to a preferred embodiment, a horizontal bar is slidably arranged on the upper end surface of the support plate between the two sliding grooves. An arc-shaped bar is fixedly arranged on the left end surface of the horizontal bar. A transverse bar extending from front to back is fixedly arranged on the right end surface of the horizontal bar. Two symmetrically distributed transverse rods in the front and back directions are fixedly arranged on the right end surface of the transverse bar. A circular plate one is fixedly arranged on the right end surface of the transverse rod. Two symmetrically distributed fixing blocks sleeved on the corresponding transverse rods are fixedly arranged on the upper end surface of the support plate. A second spring sleeved on the corresponding transverse rod is jointly fixedly arranged between the circular plate one and the fixing block.

[0014] According to an advantageous embodiment, the adjusting mechanism further includes a pushing group, the pushing group includes moving grooves, moving grooves are formed in both the front and rear side surfaces of the horizontal bar, moving blocks are slidably arranged in the moving grooves, and a pushing bar is jointly hinged between the moving block and the sliding rod on the corresponding side.

[0015] According to an advantageous embodiment, two positioning groups which are symmetrically distributed front and rear and used for limiting the position of the sliding rod are arranged on the left end surface of the transverse bar, the positioning group is composed of two limiting bars which are symmetrically distributed front and rear, the limiting bars are fixedly arranged on the left end surface of the transverse bar, the limiting bars are sequentially divided into an inclined section and a transverse section from left to right, and the inclined sections of the two limiting bars in the same positioning group are close to each other from left to right.

[0016] According to an advantageous embodiment, the adjusting group two includes a fixed bar, the fixed bar is fixedly arranged on the left end surface of the horizontal section of the U-shaped plate, a vertical rod slidably penetrates through the side far away from the U-shaped bar of the fixed bar, a universal wheel is arranged at the lower end surface of the vertical rod, a circular plate two is fixedly arranged at the upper end surface of the vertical rod, and a spring three sleeved on the corresponding vertical rod is jointly fixedly arranged between the circular plate two and the fixed bar. Taking the front-side adjusting unit as an example for explanation, placing grooves are formed in the front sections of the two vertical rods, sliding blocks are slidably arranged in the placing grooves, pushing rods are fixedly arranged on the end surfaces of the two sliding blocks away from each other, a pushing plate is fixedly arranged on the placing plate, a pushing block is slidably arranged on the pushing plate, and the pushing block is rotatably sleeved on the corresponding pushing rod.

[0017] According to an advantageous embodiment, a locking group is jointly arranged between the U-shaped plate and the corresponding connecting plate, the locking group includes a pressing rod, the pressing rod is slidably arranged on the upper end surface of the horizontal section of the U-shaped plate, a lower pressing plate is fixedly arranged on the upper end surface of the pressing rod, a spring four sleeved on the corresponding pressing rod is jointly fixedly arranged between the lower pressing plate and the U-shaped plate, a positioning bar is fixedly arranged on the lower end surface of the lower pressing plate, and a positioning groove matched with the positioning bar is formed in the connecting plate.

[0018] According to an advantageous embodiment, a transmission group is jointly arranged on the vertical rod and the fixed bar, the transmission group includes a transmission bar, the transmission bar is slidably arranged left and right on the fixed bar, the transmission bar is composed of two inclined sections which are symmetrically distributed left and right, a short straight section is jointly connected between the two inclined sections, long straight sections are arranged at the ends of the two inclined sections away from each other, the long straight section close to the fixed bar is slidably connected to the fixed bar, a transmission column is fixedly arranged on the end surface of the positioning bar close to the U-shaped plate, and an articulated bar is jointly 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, when the cutting tool faces different terrains through the operation of the adjustment unit, the cutting inclination angle of the cutting tool is adaptively adjusted, avoiding the problem of damage to the cutting tool caused by ground collision of the cutting tool, improving the service life of the cutting tool. Secondly, in the present invention, the cutting position of the cutting tool is adjusted through the adjustment mechanism, so that the two cutting tools are suitable for cutting grass at different heights simultaneously. When the two cutting tools cut weeds around trees or stones, the two cutting tools avoid the trees during cutting, protecting the cutting tools and avoiding 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 technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

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

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

[0023] Figure 3 The partial component schematic diagram of the first rotating bar, the pushing group and the first adjusting group provided according to an embodiment of the present invention is shown.

[0024] Figure 4 The partial component three-dimensional structural schematic diagram of the cutting tool and the adjustment unit provided according to an embodiment of the present invention is shown.

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

[0026] Figure 6 The [embodiment number] provided according to an embodiment of the present invention is shown Figure 5 The enlarged view of the structure at A.

[0027] Among them, the above-mentioned drawings include the following reference numerals:

[0028] 1. Support plate; 2. Support column; 20. Connecting column; 21. Rotating wheel; 22. Support wheel; 3. Rotating plate; 31. First rotating bar; 310. Second rotating bar; 32. Connecting bar; 33. Placing plate; 330. Connecting plate; 331. U-shaped plate; 34. Pushing handle; 4. Cutting tool; 5. Adjusting mechanism; 50. Sliding groove; 51. First adjusting group; 510. Slider; 511. Sliding rod; 512. Universal wheel; 513. Fixed ring; 514. First spring; 515. Sliding slot; 516. Rectangular block; 517. Fixed column; 52. Pushing group; 520. Moving groove; 521. Moving block; 522. Pushing bar; 53. Arc-shaped bar; 54. Horizontal bar; 540. Horizontal strip; 541. Horizontal rod; 542. Fixed block; 543. Second spring; 55. Positioning group; 550. Limiting bar; 6. Adjusting unit; 60. Second adjusting group; 600. Fixed strip; 601. Vertical rod; 602. Third spring; 603. Sliding block; 604. Pushing rod; 605. Pushing plate; 606. Pushing block; 61. Locking group; 610. Pressing rod; 611. Lower pressing plate; 612. Fourth spring; 613. Positioning bar; 614. Positioning groove; 62. Transmission group; 620. Transmission strip; 621. Transmission column; 622. Hinge bar. Detailed implementation manners

[0029] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand 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 departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0030] As Figure 1 , Figure 2 and Figure 5 shown, a rotary cutting mower includes: a support plate 1, the right part of the support plate 1 is fixedly penetrated by a support column 2, the support column 2 is fixedly penetrated by a connecting column 20 located below the support plate 1, both front and rear end faces of the connecting column 20 are rotatably provided with rotating wheels 21, the lower end face of the support plate 1 is fixedly provided with a vertical strip, and a support wheel 22 located on the left side of the rotating wheel 21 is rotatably provided on the vertical strip. The upper part of the support column 2 is rotatably provided with two symmetrically distributed rotating plates 3 on the front and rear sides through a sleeve, both opposite sides of the two rotating plates 3 are rotatably provided with first rotating bars 31, one side of the first rotating bar 31 away from the support column 2 is hinged with a connecting bar 32, the lower end face of the connecting bar 32 is fixedly provided with a U-shaped plate 331 with an opening facing downwards, and two vertical sections of the U-shaped plate 331 are jointly hinged with a placing plate 33 through a connecting plate 330. The lower end face of the placing plate 33 is rotatably provided with a cutting tool 4 through a rotating shaft, and the rotating shaft is connected to a motor.

[0031] As Figure 1 and Figure 2 shown, an adjusting mechanism 5 for preliminarily adjusting the height of the cutting tool 4 is provided on the support plate 1. The adjusting mechanism 5 includes a sliding groove 50. Two symmetrically distributed sliding grooves 50 are formed through the left section of the support plate 1 in the front and rear directions. An adjusting group 51 is jointly provided on the sliding groove 50 and the corresponding rotating bar 31. An arc-shaped bar 53 is arranged above the cutting tool 4. The upper end surface of the support plate 1 is provided with a pushing handle 34 through two L-shaped bars symmetrically distributed in the front and rear directions.

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

[0033] As Figure 2 and Figure 3 shown, a sliding groove 515 extending along the length direction of the rotating bar 31 is formed through the upper end surface of the rotating bar 31. A rectangular block 516 is rotatably arranged on the upper end surface of the sliding rod 511, and the rectangular block 516 is located in the sliding groove 515. Matching grooves are formed on the front and rear side surfaces of the rotating bar 31. Fixed columns 517 located in the corresponding matching grooves are fixedly arranged on the front and rear end surfaces of the rectangular block 516. A rotating bar 310 located above the corresponding rotating bar 31 is hinged between the rotating plate 3 and the connecting bar 32. The length of the rotating bar 310 is equal to that of the rotating bar 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 contacts the ground and is flush with the supporting wheel 22, the first spring 514 is compressed and deformed. The elastic force generated by the deformation of the first spring 514 acts on the sliding rod 511 through the fixing ring 513, and the sliding rod 511 is used to push the universal wheel 512 tightly against the ground. During operation, the operator pushes the handle 34 to move the support plate 1. The support plate 1 drives the sliding rod 511 and the universal wheel 512 to move synchronously through the slider 510. When the height of one side of the ground is higher than the height of the ground at the position where it contacts the supporting wheel 22, the ground pushes the sliding rod 511 to move upward through the corresponding universal wheel 512. The corresponding first spring 514 is continuously compressed and deformed. The sliding rod 511 pushes the rectangular block 516 to move upward synchronously. The rectangular block 516 pushes the left end of the first rotating bar 31 to deflect upward through the fixing column 517. At this time, the rectangular block 516 generates a relative sliding to the left in the corresponding sliding groove 515, avoiding mutual jamming between the sliding rod 511 and the first rotating bar 31. The first rotating bar 31 drives the corresponding connecting bar 32 to move upward synchronously. Through the parallelogram structure formed by the first rotating bar 31, the second rotating bar 310, the rotating plate 3 and the connecting bar 32, when the connecting bar 32 deflects upward, it is always parallel to the axis of the supporting column 2. Furthermore, when the cutting tool 4 cuts the grassland, the cutting tool 4 is always parallel to the ground. The upward deflection of the connecting bar 32 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 height of the corresponding side of the ground is lower than the height of the ground at the position where it contacts the supporting wheel 22, the elastic force generated by the deformation of the first spring 514 makes the universal wheel 512 always tightly against the ground. The first rotating bar 31 drives the corresponding cutting tool 4 to move downward. At this time, the rectangular block 516 generates a relative sliding to the right in the corresponding sliding groove 515.

[0036] As Figure 2 shown, a horizontal bar 54 is slidably arranged left and right on the upper end surface of the support plate 1 between the two chutes 50. An arc bar 53 is fixedly arranged on the left end surface of the horizontal bar 54. A transverse bar 540 extending from front to back is fixedly arranged on the right end surface of the horizontal bar 54. Two symmetrically distributed transverse rods 541 are fixedly arranged on the right end surface of the transverse bar 540. A circular plate one is fixedly arranged on the right end surface of the transverse rod 541. Two symmetrically distributed fixing blocks 542 sleeved on the corresponding transverse rods 541 are fixedly arranged on the upper end surface of the support plate 1. A second spring 543 sleeved on the corresponding transverse rod 541 is fixedly arranged between the circular plate one and the fixing block 542.

[0037] As Figure 2 andFigure 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] In the initial state, the moving block 521 is located on the right side of the corresponding moving slot 520. During the process of releasing the limit on the sliding rod 511, the support plate 1 continuously moves leftward, and the horizontal bar 54 moves relatively rightward. During this process, the moving block 521 moves from the right side of the moving slot 520 to the left side until the moving block 521 slides to contact the left inner wall of the moving slot 520. Then, the positioning group 55 releases the limit on the sliding rod 511, and the support plate 1 and the transverse bar 540 continue to move relatively. The positioning group 55 and the sliding rod 511 move relatively away from each other. At this time, the ends of the two pushing bars 522 connected to the corresponding sliding rod 511 move away from each other, pushing the sliding rod 511 to move along the chute 50 in a direction away from the horizontal bar 54. The sliding rod 511 drives the corresponding first rotating bar 31 to rotate synchronously around the axis of the support column 2 through the rectangular block 516. The first 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 placing plate 33 to move synchronously through the connecting plate 330. During the process of the moving block 521 moving from the left side of the sliding rod 511 to being on the same straight line as the two sliding rods 511, the two cutting tools 4 move leftward and away from each other simultaneously, avoiding the trees on the left side of the two cutting tools 4 and preventing the cutting tools 4 from contacting the trees and being damaged. The support plate 1 continues to move leftward. 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 a direction closer to the horizontal bar 54, so that the two cutting tools 4 approach each other during the leftward movement.

[0041] It should be noted that the length of the chute 50 is greater than the length of the pushing bar 522.

[0042] After the arc-shaped bar 53 fits with the tree, the pushing group 52 makes the two cutting tools 4 move away from each other first and then approach each other during the leftward movement, so that the cutting tools 4 cut the weeds around the tree along an arc-shaped trajectory, avoiding damage to the cutting tools 4 caused by their collision with the tree during the operation of the cutting tools 4.

[0043] Such as Figure 1 、 Figure 4 and Figure 5As shown, an adjusting unit 6 for adjusting the cutting angle of the cutting tool 4 is provided on the placing plate 33. The adjusting unit 6 includes an adjusting group two 60. The placing plate 33 and the U-shaped plate 331 are jointly provided with the adjusting group two 60. The adjusting group two 60 includes a fixing bar 600. The left end face of the horizontal section of the U-shaped plate 331 is fixedly provided with the fixing bar 600. A vertical rod 601 slides through the fixing bar 600 away from the U-shaped bar side. A universal wheel 512 is provided on the lower end face of the vertical rod 601. A circular plate two is fixedly provided on the upper end face of the vertical rod 601. A spring three 602 sleeved on the corresponding vertical rod 601 is jointly fixedly provided between the circular plate two and the fixing bar 600. Taking the front-side adjusting unit 6 as an example for illustration, placing grooves are formed in the front sections of the two vertical rods 601. A sliding block 603 is slidably arranged in the placing groove. Push rods 604 are fixedly provided on the end faces of the two sliding blocks 603 away from each other. A push plate 605 is fixedly provided on the placing 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.

[0044] As Figure 4 , Figure 5 and Figure 6 shown, a locking group 61 is jointly provided between the U-shaped plate 331 and the corresponding connecting plate 330. The locking group 61 includes a pressing rod 610. The pressing rod 610 is slidably arranged on the upper end face of the horizontal section of the U-shaped plate 331. A lower pressing plate 611 is fixedly provided on the upper end face of the pressing rod 610. A spring four 612 sleeved on the corresponding pressing rod 610 is jointly fixedly provided between the lower pressing plate 611 and the U-shaped plate 331. A positioning bar 613 is fixedly provided on the lower end face of the lower pressing plate 611. A positioning groove 614 matched with the positioning bar 613 is formed on the connecting plate 330.

[0045] As Figure 4 , Figure 5 and Figure 6 shown, a transmission group 62 is jointly provided between the vertical rod 601 and the fixing bar 600. The transmission group 62 includes a transmission bar 620. The transmission bar 620 slides left and right on the fixing bar 600. The transmission bar 620 is composed of two inclined sections symmetrically distributed left and right. A short straight section is jointly connected between the two inclined sections. Long straight sections are arranged at the ends of the two inclined sections away from each other. The long straight section close to the fixing bar 600 is slidably connected to the fixing bar 600. A transmission column 621 is fixedly provided on the end face of the positioning bar 613 close to the U-shaped plate 331 side. An articulated bar 622 is jointly 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 line segment of the transmission strip 620, the positioning strip 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 ). When the universal wheel 512 on the vertical rod 601 is in close contact with the ground, the third spring 602 is stretched and deformed (see Figure 4 state). During operation, the operator pushes the handle 34 to move the support plate 1 to the left. If there is a downward depression on the left side of the cutting tool 4, the elastic force generated by the deformation of the third spring 602 pushes the universal wheel 512 on it downward through the vertical rod 601. The universal wheel 512 moves downward and is in close contact with the inner wall of the depression. During the downward movement of the vertical rod 601, the transmission strip 620 is pulled to move towards the vertical rod 601 through the hinge strip 622. When the transmission strip 620 moves to the point where its right inclined section contacts the transmission column 621, through the cooperation between the inclined section of the transmission strip 620 and the transmission column 621, the transmission strip 620 pushes the positioning strip 613 upward, and the fourth spring 612 is stretched and deformed. After the transmission column 621 moves and contacts the long horizontal section on the right side of the transmission strip 620, the unlocking between the U-shaped plate 331 and the connecting plate 330 is completed. At this time, the vertical rod 601 moves downward until the upper inner wall of the placement groove contacts the sliding block 603. Then, the vertical rod 601 drives the sliding block 603 to continue moving downward synchronously. The sliding block 603 pushes the push block 606 downward synchronously through the push rod 604. The push block 606 presses down the push plate 605, causing the placement plate 33 to rotate around the hinge point of the U-shaped plate 331 and the connecting plate 330. The placement plate 33 drives the cutting tool 4 to deflect downward, thereby realizing the adaptive adjustment of the cutting angle of the cutting tool 4. During the rotation of the cutting tool 4, the angle of the push block 606 deflects synchronously with the cutting tool 4, causing the push block 606 to rotate relative to the push rod 604. At the same time, due to the deflection of the push plate 605, relative sliding occurs between the push block 606 and the push plate 605, avoiding the jamming of the adjustment unit 6.

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

[0048] During specific operation, the operator pushes the support plate 1 by the push handle 34. During the movement of the support plate 1, the first adjustment group 51 works to adaptively adjust the cutting height of the cutting tool 4, so that the two cutting tools 4 are adapted to cut the grass at different heights on both sides of the supporting wheel 22, avoiding the problem that the grass heights on both sides of the grassland are unequal after cutting. When cutting the grassland with a downward depression or an upward bulge, the transmission group 62 works to unlock the locking group 61, and during the cutting process of the cutting tool 4 moving, the second adjustment group 60 adjusts the cutting angle of the cutting tool 4, so that the cutting angle of the cutting tool 4 is adaptively adjusted, avoiding the problem that the cutting tool 4 is damaged due to the collision with the raised ground because the cutting angle of the cutting tool 4 does not change during the cutting process. When cutting the grass around the tree, through the operation of the pushing group 52, the cutting tool 4 moves to cut and moves to both sides of the tree to avoid the cutting tool 4 from being damaged.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation on the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0050] In addition, the terms "first", "second", "No. 1", "No. 2" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "No. 1", "No. 2" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0051] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "installed", "connected" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0052] The embodiments of this specific implementation manner are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A rotary lawn mower, characterized in that: include: A bracket plate, a support column is fixedly passed through the right side of the bracket plate, a connecting column located at the lower side of the bracket plate is fixedly passed through the supporting column, a rotating wheel is rotatably provided on both the front and rear end surfaces of the connecting column, a vertical bar is fixedly provided on the lower end surface of the bracket plate, a supporting wheel located on the left side of the rotating wheel is rotatably provided on the vertical bar, and the upper section of the support column is provided with two front-to-back symmetrical rotating plates through a sleeve rotation, and a rotating bar 1 is rotatably provided on the opposite back surfaces of the two rotating plates, and a cutting tool is provided below the rotating bar 1; A connecting bar is hingedly connected to one side of the rotating bar away from the supporting column, a U-shaped plate is fixedly arranged at the lower end of the connecting bar, and two vertical sections of the U-shaped plate are hingedly connected to a placement plate through the connecting plate; The adjustment mechanism is arranged on the support plate and is used for preliminarily adjusting the height of the cutting tool. The adjustment unit is arranged on the placement plate and is used 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 support plate is provided with a push handle through two L-shaped strips symmetrically arranged front and rear. The adjustment mechanism includes two slide grooves which are opened on the left section of the bracket plate and are symmetrical in front and back. The slide groove and the corresponding rotating bar are jointly provided with an adjustment group 1. An arc bar is provided above the cutting tool. The bracket plate is provided with a pushing group for pushing the two cutting tools away from each other. The first adjustment group includes a slider slidably arranged in the slide groove, a sliding rod slidingly penetrates the slider, a universal wheel is arranged at the lower end 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; The upper end surface of the bracket plate is slidably provided with a horizontal bar located between two slide grooves; The adjustment mechanism also includes a push group, which includes a moving groove opened on the front and rear sides of the horizontal bar, a moving block is slidably arranged in the moving groove, and a push bar is hinged between the moving block and the corresponding side sliding rod; Adjustment group 2 includes a fixing bar fixed to the left end face of the horizontal section of the U-shaped plate, a vertical rod slidingly penetrated by the fixing bar away from the side of the U-shaped plate, a universal wheel is arranged 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 mounted on the corresponding vertical rod is fixedly provided between the circular plate 2 and the fixing bar, the front adjustment unit includes two vertical rods, a placement groove is opened at the front section of the two vertical rods, a sliding block is slidably arranged in the placement groove, a pushing rod is fixedly provided on the end faces of the two sliding blocks away from each other, a pushing plate is fixedly provided on the placement plate, a pushing block is slidably arranged on the pushing plate, and the pushing block is rotatably mounted on the corresponding pushing rod.

2. The rotary mower according to claim 1, characterized in that: The upper end surface of the rotating bar 1 is penetrated by a sliding groove extending along the length direction of the rotating bar 1, the upper end surface of the sliding rod is rotatably provided with a rectangular block, and the rectangular block is located in the sliding groove, the front and rear side surfaces of the rotating bar 1 are provided with matching grooves, and the front and rear end surfaces of the rectangular block are fixed with fixing columns located in the corresponding matching grooves.

3. The rotary lawn mower according to claim 1, characterized in that: 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. A cutting tool is arranged on the lower end surface of the placement plate to rotate through a rotating shaft.

4. The rotary mower according to claim 1, characterized in that: An arc-shaped bar is fixedly provided on the left end face of the horizontal bar, a transverse bar extending from front to back is fixedly provided on the right end face of the horizontal bar, two transverse rods symmetrically distributed front to back are fixedly provided on the right end face of the transverse rod, a circular plate 1 is fixedly provided on the right end face of the transverse rod, two fixing blocks symmetrically distributed front to back and sleeved on the corresponding transverse rods are fixedly provided on the upper end face of the bracket plate, and a spring 2 sleeved on the corresponding transverse rod is fixedly provided between the circular plate 1 and the fixing block.

5. The rotary mower according to claim 4, characterized in that: 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. A limiting strip is fixedly provided on the left end face of the transverse bar. The limiting strips are 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.

6. The rotary mower according to claim 1, characterized in that: The U-shaped plate and the corresponding connecting plate are jointly provided with a locking group, and the locking group includes a lower pressure rod, and the upper end surface of the horizontal section of the U-shaped plate is slidably provided with a lower pressure rod, and the upper end surface of the lower pressure rod is fixedly provided with a lower pressure plate, and a spring four mounted on the corresponding lower pressure rod is jointly fixedly provided between the lower pressure plate and the U-shaped plate, and a positioning strip is fixedly provided on the lower end surface of the lower pressure plate, and a positioning groove cooperating with the positioning strip is opened on the connecting plate.

7. The rotary mower according to claim 6, characterized in that: The vertical rod and the fixed bar are jointly provided with a transmission group, and the transmission group includes a transmission bar. The fixed bar is provided with a transmission bar that can be slid left and right, and the transmission bar is composed of two inclined sections that are symmetrically distributed left and right, and a short straight line section is commonly connected between the two inclined sections, and a long straight line section is arranged 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 fixed 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.

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