Remote control mower with obstacle crossing and obstacle clearing

Abstract

This invention discloses a remote-controlled lawnmower with obstacle-crossing and clearing capabilities, belonging to the field of agricultural power machinery technology. The lawnmower has a slide rail at its front end, with a slider inside the triangular shaft slidably connected to the slide rail. A cutting shaft, connecting to the cutting element, is slidably inserted into a sleeve rod, with a rack fixedly connected to the top of the cutting shaft. When the lawnmower encounters an obstacle, the moving wheel is obstructed, and the slider slides to the end of the slide rail and combines with the rotating block to form a whole. Simultaneously, the limiting mechanism on the rotating block is released, and the triangular shaft rotates around the obstructed moving wheel as a fulcrum, achieving obstacle-crossing. During obstacle-crossing, the slider drives the gear to mesh with the rack, causing the cutting shaft and cutting element to rise synchronously with the rotation of the triangular shaft. While overcoming obstacles, it effectively avoids contact between the high-speed rotating cutting element and the obstacle, preventing damage to the cutting element and improving the adaptability and safety of the lawnmower. After overcoming the obstacle, the equipment automatically returns to normal operation under the action of gravity and a reset mechanism.

Description

Technical Field

[0001] This invention relates to agricultural power machinery technology, specifically a remote-controlled lawnmower capable of overcoming and clearing obstacles. Background Technology

[0002] As is generally known, a lawnmower is an agricultural power machine that moves across a lawn while simultaneously mowing it. Its working principle typically involves an electric motor driving the cutting blades or cord to rotate at high speed, thereby cutting the grass stems. In normal operation, the lawnmower is propelled forward by the rear drive wheel, while the front bottom drive wheel provides support and movement by contacting the ground. These devices are widely used in lawn maintenance, achieving grass trimming through movement across the ground.

[0003] The shortcomings of existing technologies lie in the significant deficiencies of current lawnmowers in practical use. When rocks, tree roots, or other hard obstacles appear on the grass, although the lawnmower's wheels may be obstructed, its cutting components continue to rotate at high speed. Due to the lack of an effective linkage protection mechanism, the cutting components are highly susceptible to contact with these obstacles. If the obstacles are hard or sharp, direct impact can cause the cutting components (such as blades or cutting ropes) to break, deform, or be damaged, and may even damage the drive motor, increasing maintenance costs and posing safety hazards. Therefore, there is an urgent need for an improved solution that can automatically protect the cutting components when overcoming obstacles. Summary of the Invention

[0004] The purpose of this invention is to provide a remote-controlled lawnmower with obstacle-crossing and obstacle-clearing capabilities to overcome the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: comprising: a body, wherein two sets of independent sleeve rods are fixedly installed at the bottom front end of the body in a horizontally parallel manner; and further comprising: A triangular shaft is provided, which is located on both sides of the front end of the machine body and has three sets of independent movable wheels rotatably mounted on it. The slider is fixedly connected to the inside of the triangular shaft and slidably connected to the slide rail; A cutting shaft, which is movably inserted into the bottom end of the sleeve rod; An obstacle-crossing mechanism is installed inside the slider. The obstacle-crossing mechanism is connected to the slider via a transmission. When the slider slides to its end position within the slide rail, it forms a whole with the rotating block and releases the limiting mechanism from restricting the rotation of the rotating block. By utilizing the resistance of the obstacle to the moving wheel, the triangular shaft is driven to rotate and thus overcome the obstacle. While the triangular shaft rotates, the height of the cutting shaft and the cutting part is raised, thus protecting the cutting part while overcoming the obstacle.

[0006] As a further description of the above technical solution: the front side of the machine body is provided with a slide rail, which is divided into two sections, one long and one short, and is separated by a locking block on the upper and lower side walls. The long section of the slide rail is the front end, which provides a buffer for the moving wheels to move under the action of friction during daily use of the lawnmower body. The short section of the slide rail is the end, which drives the rotation of the triangular shaft when the lawnmower is crossing obstacles.

[0007] As a further description of the above technical solution: a cutting shaft is slidably inserted into the sleeve, a cutting component is fitted at the bottom end of the cutting shaft, and a rack is fixedly connected to the top end of the cutting shaft, the rack being slidably inserted into the sleeve.

[0008] As a further description of the above technical solution: the obstacle-crossing mechanism includes a slider fixedly installed inside the triangular shaft. The slider is slidably connected to a slide rail. A rotating groove is opened at the end of the slide rail. A rotating block is rotatably connected in the rotating groove. The rotating block is circular with one side open, and the opening size corresponds to the width of the slide rail. A mating groove is symmetrically opened on the upper and lower sides inside the rotating block. A mating block is detachably and slidably engaged in the mating groove. The mating block is fixedly installed on the upper and lower sides of the slider, and the mating block itself has elastic deformation characteristics.

[0009] As a further description of the above technical solution: a gear is fixedly connected to the inner side of the slider, and the gear is slidably and separably inserted into the slot and meshes with one side of the rack.

[0010] As a further description of the above technical solution: the slider has an I-shaped cross-section, and the inner wall of the slider sliding connection rail is a cuboid with dimensions adapted to the width of the rail.

[0011] As a further description of the above technical solution: a positioning groove is provided on the inner side wall of the rotating groove, and a positioning ring is magnetically rotatably connected in the positioning groove, and the positioning ring is fixedly sleeved on the outer periphery of the rotating block.

[0012] As a further description of the above technical solution: one side of the slider is connected to the inner wall of the rotating block via a compression spring.

[0013] As a further description of the above technical solution: the limiting mechanism includes an abutting ball that is slidably inserted into the end face of the mating block via an abutting spring. The abutting ball slidably abuts the top end of an abutting rod. The abutting rod is slidably inserted into a through hole. The through hole is located inside the center of the mating groove. Sliding grooves are provided on both sides of the through hole and a limiting plate is slidably connected to it via a return spring. The limiting plate is fixedly connected to the outer periphery of the middle part of the abutting rod. The bottom end of the abutting rod slidably abuts the top end of the limiting rod. The bottom end of the limiting rod is movably inserted into a folding hole via a limiting spring. The folding holes are symmetrically opened on the upper and lower side walls of the rotating groove.

[0014] As a further description of the above technical solution: the initial state of the limiting rod is to press the bottom end of the abutment rod and insert it into the through hole to restrict the rotating block connected in the rotating groove.

[0015] In the above technical solution, the remote-controlled lawnmower with obstacle-crossing and obstacle-clearing capabilities provided by the present invention has the following beneficial effects: 1. Protect cutting components and prevent damage with an automatic lifting mechanism: When the lawnmower overcomes an obstacle, the obstacle-overcoming mechanism will automatically retract and lift the cutting shaft and cutting parts into the machine body through gear and rack transmission. This action effectively prevents the high-speed rotating cutting parts from contacting hard or sharp obstacles during the obstacle-overcoming process, thereby avoiding breakage, wear or damage to the cutting parts or the motor.

[0016] 2. Enhanced terrain adaptability, triangular shaft flipping over obstacles: Through the cooperation of the slider and the rotating block, the triangular shaft is allowed to rotate and flip over when encountering obstacles. The sleeves and obstacle-crossing mechanisms on both sides of the machine are independently set, which means that when the lawnmower encounters an obstacle on one side, it can independently perform obstacle-crossing action without the need for whole-machine adjustment, so that it can adapt to uneven grass surfaces.

[0017] 3. It has an automatic reset function, with gravity and magnetic reset: After overcoming obstacles, the slider and rotating block can automatically rotate and reset by using the gravity of the cutting components themselves, combined with the repulsive effect of the positioning ring and the magnetic components in the positioning groove. After reset, the moving wheels automatically return to normal, and the lawnmower can continue to mow without manual intervention, thus improving work efficiency.

[0018] 4. Safe and reliable limiting structure with double locking: The slider and the rotating block are engaged by the docking block and the docking groove, and with the help of the abutment ball structure, a double locking is formed to ensure stability when crossing obstacles. Only when the slider slides to the end of the slide rail will the mechanism be triggered to release the limit on the rotating block. During daily flat work, the limiting mechanism can effectively lock the rotating block to ensure the stability of the lawnmower. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure between the triangular shaft and the three sets of moving wheels provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the triangular shaft provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the sleeve provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of the gear structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the slide rail provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the transfer block provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the slider provided in an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the abutment rod provided in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures: 1-Main body; 2-Slide rail; 3-Triangular shaft; 4-Moving wheel; 5-Cutting part; 6-Slider; 7-Gear; 8-Sleeve rod; 9-Slot; 10-Rack; 11-Cutting shaft; 12-Compression spring; 13-Clamping block; 14-Rotating groove; 15-Rotating block; 16-Mating groove; 18-Folding hole; 19-Limiting rod; 20-Positioning groove; 21-Positioning ring; 22-Through hole; 23-Abutting rod; 24-Mating block; 25-Abutting ball; 26-Abutting spring; 27-Slide groove; 28-Limiting plate; 29-Reset spring; 30-Limiting spring. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Please see Figures 1-9 This invention provides a remote-controlled lawnmower with obstacle-crossing and obstacle-clearing capabilities, comprising: a body 1, with two independent sets of levers 8 fixedly installed at the bottom front end of the body 1 in a parallel configuration; and further comprising: Triangular shaft 3, triangular shaft 3 is set on both sides of the front end of the machine body 1 and three sets of independent moving wheels 4 are rotatably installed; Slider 6 is fixedly connected to the inside of the triangular shaft 3 and slidably connected to the slide rail 2; Cutting shaft 11 is movably inserted into the bottom end of sleeve 8; The obstacle-crossing mechanism is located inside the slider 6 and is connected to the slider 6 via a transmission. When the slider 6 slides to its end position within the slide rail 2, the slider 6 and the rotating block 15 form a whole, and the limiting mechanism for the rotation of the rotating block 15 is released. By utilizing the resistance of the obstacle to the moving wheel 4, the triangular shaft 3 is driven to rotate and thus overcome the obstacle. While the triangular shaft 3 is rotating, the height of the cutting shaft 11 and the cutting piece 5 is raised, thus protecting the cutting piece 5 while overcoming the obstacle.

[0024] In another embodiment of the present invention, preferably, slide rails 2 are laterally provided on both sides of the front end of the body 1. The slide rails 2 are divided into two sections, one long and one short, and are separated by locking blocks 13 on the upper and lower side walls of the slide rails 2. The long section of the slide rail 2 is the front end, which provides a buffer for the moving wheels 4 to move under the action of friction during daily use of the lawnmower body 1. The short section of the slide rail 2 is the end, which drives the triangular shaft 3 to rotate when the lawnmower is crossing obstacles.

[0025] In another embodiment of the present invention, a cutting shaft 11 is slidably inserted into the sleeve 8, a cutting component 5 is fitted at the bottom end of the cutting shaft 11, and a rack 10 is fixedly connected to the top end of the cutting shaft 11. The rack 10 is slidably inserted into the sleeve 8.

[0026] In another embodiment of the present invention, the obstacle-crossing mechanism includes a slider 6 fixedly installed inside the triangular shaft 3. The slider 6 is slidably connected in the slide rail 2. A rotating groove 14 is provided at the end of the slide rail 2. A rotating block 15 is rotatably connected in the rotating groove 14. The rotating block 15 is circular with one side open, and the opening size corresponds to the width of the slide rail 2. A docking groove 16 is symmetrically provided on the upper and lower sides inside the rotating block 15. A docking block 24 is detachably and slidably engaged in the docking groove 16. The docking block 24 is fixedly provided on the upper and lower sides of the slider 6, and the docking block 24 itself has elastic deformation characteristics.

[0027] In another embodiment of the present invention, a gear 7 is fixedly connected to the inner side of the slider 6. The gear 7 is slidably and separably inserted into the slot 9 and meshes with one side of the rack 10.

[0028] In another embodiment of the present invention, the slider 6 has an I-shaped cross-section, and the inner wall of the slider 6 that is slidably connected to the slide rail 2 is a cuboid with dimensions that are adapted to the width of the slide rail 2.

[0029] In another embodiment of the present invention, a positioning groove 20 is provided on the inner sidewall of the rotating groove 14, and a positioning ring 21 is magnetically rotatably connected in the positioning groove 20. The positioning ring 21 is fixedly sleeved on the outer periphery of the rotating block 15.

[0030] In another embodiment of the present invention, one side of the slider 6 is connected to the inner wall of the rotating block 15 via a compression spring 12.

[0031] In another embodiment of the present invention, the limiting mechanism includes an abutment ball 25 slidably inserted into the end face of the docking block 24 via an abutment spring 26. The abutment ball 25 slidably abuts the top end of the abutment rod 23. The abutment rod 23 is slidably inserted into the through hole 22, which is located inside the center of the docking groove 16. Sliding grooves 27 are provided on both sides of the through hole 22 and are slidably connected to the limiting plate 28 via a return spring 29. The limiting plate 28 is fixedly connected to the outer periphery of the middle part of the abutment rod 23. The bottom end of the abutment rod 23 slidably abuts the top end of the limiting rod 19. The bottom end of the limiting rod 19 is movably inserted into the folding hole 18 via a limiting spring 30. The folding hole 18 is symmetrically opened on the upper and lower side walls of the rotating groove 14.

[0032] In another embodiment of the present invention, preferably, the initial state of the limiting rod 19 presses against the bottom end of the abutment rod 23 and is inserted into the through hole 22 to restrict the rotating block 15 rotatably connected in the rotating groove 14.

[0033] The lawnmower moves across the grass while cutting grass, using the high-speed rotation of the cutting blade or cutting rope. When obstacles appear on the grass, the high-speed rotating cutting part 5 will also come into contact with the obstacles. When the obstacles are hard or sharp, they will damage the cutting part 5. Therefore, the lawnmower needs to overcome or clear obstacles according to the conditions on the grass. After placing the lawnmower on the grass, start it using the remote control. At this time, two of the three sets of wheels 4 mounted on the triangular shaft 3 at the bottom front of the lawnmower will contact the ground and move. The drive wheel at the rear of the lawnmower propels it forward. Due to the friction between the wheels 4 and the grass, the slider 6, fixed to one side of the triangular shaft 3, will slide from the front to the rear within the slide rails 2 on both sides of the front of the body 1. Depending on the friction between the grass and the body 1, the slider 6 will move within the area between the front end and the locking block 13 within the slide rails 2. The movement of these wheels 4 will not affect the lawnmower's mowing function. (See attached...) Figure 6 As shown, symmetrical locking blocks 13 are set at the rear of the middle of the slide rail 2 to limit the movement range of the slider 6 during daily lawn mowing. When encountering an obstacle, the obstacle-crossing mechanism will allow the lawnmower to overcome it. Specifically, the obstacle will abut the front end of the moving wheel 4, preventing its forward movement. When this resistance exceeds the force of the locking block 13 against the slider 6, and due to the elastic deformation capability of the locking block 13, the slider 6 will fold downwards, pressing the locking block 13 and sliding towards the end of the slide rail 2 until it is inserted into the rotating block 15. After the slider 6 is inserted into the rotating block 15, the elastically deformable mating blocks 24 on the upper and lower sides of the slider 6 will correspondingly insert into the mating grooves 16 on the inner sidewall of the rotating block 15. At this point, the slider 6 and the rotating block 15 form a single unit through the engagement of the mating blocks 24 and the mating grooves 16, while the rotating block 15 is open on one side. The cylindrical body has a positioning ring 21 on the outer periphery of the rotating block 15. The positioning ring 21 is rotatably inserted into the positioning groove 20. The positioning groove 20 is correspondingly opened on the inner side wall of the rotating groove 14 opened at the end of the slide rail 2. At this time, the slider 6 can form a whole with the rotating block 15 and automatically release the limit mechanism between the rotating block 15 and the rotating groove 14. At this time, since the front set of the two sets of moving wheels 4 in contact with the ground is blocked by the obstacle and cannot move, the triangular shaft 3 can rotate with the slider 6 and the rotating block 15. At this time, the triangular shaft 3 will rotate forward with the moving wheel 4 in contact with the obstacle as the center, and rotate the upper moving wheel 4 that is not in contact with the ground forward to contact the surface of the obstacle and rotate, thereby overcoming the obstacle. During the obstacle-crossing process, the obstacle-crossing mechanism will also retract the cutting component 5 into the machine body 1 to prevent the high-speed rotation of the cutting component 5 from contacting the obstacle and causing damage to the cutting component 5. Specifically: When the moving wheel 4 encounters an obstacle and the slider 6 slides towards its end within the slide rail 2, combined with the attached... Figure 3 , 4 As shown in Figures 5 and 8, a triangular shaft 3 is fixedly installed at the center of the slider 6 facing the outside of the body 1. A gear 7 is fixedly connected to the slider 6 inside the slide rail 2. The position of the gear 7 corresponds to the slot 9 opened on one side of the sleeve rod 8. When the slider 6 moves to the end position of the slide rail 2, the gear 7 is inserted into the sleeve rod 8 through the slot 9 and meshes with the surface of the rack 10 that is movably set inside the sleeve rod 8. The bottom end of the rack 10 is fixedly connected to the cutting shaft 11, and a cutting element 5 is installed at the bottom end of the cutting shaft 11. After the slider 6 drives the gear 7 to mesh with the rack 10, the rotation of the triangular shaft 3 drives the gear 7 to rotate. The meshing rack 10 is raised in the sleeve rod 8 as the gear 7 rotates, thereby raising the cutting shaft 11 with the cutting element 5 installed. Thus, the cutting element 5 is retracted upward during the process of the body 1 overcoming obstacles, avoiding contact between the cutting element 5 and the obstacle. After overcoming the obstacle, simply lift the front end of the lawnmower upwards. Since the motor is installed inside the cutting seat, the weight of the motor plus the weight of the cutting piece 5, as well as the magnetic repulsion of the positioning ring 21 and the positioning groove 20, will rotate the slider 6 and the rotating block 15 as a whole, and lower the rack 10 and the cutting shaft 11. At this time, the three sets of moving wheels 4 will automatically rotate back to their original positions, and the lawn can be mowed again. After the triangular shaft 3 is rotated and reset after overcoming the obstacle, the opening of the rotating block 15 rotates back to correspond to the end of the slide rail 2. The compression spring 12 connected to the inner wall of the rotating block 15 is compressed and then rebounds. Since the slider 6 is no longer squeezed by the obstacle, the squeezing force of the slider 6 on the compression spring 12 is less than the rebound force of the compression spring 12. At this time, the rebound force of the compression spring 12 is the greatest, which can push the slider 6 from inside the rotating block 15 outward and over the blocking block 13. At this time, the lawnmower can continue to be pushed for mowing. The specific structure and effect of the slider 6 automatically releasing the limit mechanism after being inserted into the rotating block 15 are as follows: After slider 6 slides towards its end within slide rail 2 and inserts into rotating block 15, it combines with the attached... Figure 6 , 7 As shown in Figures 8 and 9, the mating blocks 24 on the upper and lower sides of the slider 6 are precisely inserted into the mating grooves 16 opened on the upper and lower inner sidewalls of the rotating block 15. At this time, the abutting ball 25 connected to the abutting spring 26 in the mating block 24 pops outward and abuts against the abutting rod 23 that is movably inserted into the through hole 22, thus inserting the abutting rod 23 into the through hole 22. The limiting plate 28 set at the middle end of the abutting rod 23 slides in the sliding groove 27 opened on the inner sidewall of the through hole 22, restricting the abutting rod 23 to only slide up and down, and limiting the limiting plate 28 and the sliding groove 27. The reset spring 29 is connected between the limiting plate 28 and the limiting plate 28 slides to reset the compression or stretching of the reset spring 29, thereby resetting the abutment rod 23. At this time, after the abutment ball 25 presses the abutment rod 23, the abutment rod 23 slides in the through hole 22, and the limiting rod 19 originally inserted in the through hole 22 is folded into the folding hole 18 and the limiting spring 30 is pressed. At this time, the limiting mechanism releases the limiting of the rotating block 15, and the rotating block 15 can be rotated in the rotating groove 14, thereby realizing the rotation of the triangular shaft 3 to perform obstacle crossing operation. It should be noted here that: Appendix Figure 9In the normal state of the rotating block 15, the abutment rod 23, which is inserted into the folding hole 18 at the bottom of the rotating groove 14, extends outward and is inserted into the through hole 22 in the positioning groove 20 of the rotating block 15. This limits the position of the rotating block 15 in the rotating groove 14 and prevents the rotating block 15 from rotating. At this time, a limit rod 19 is inserted inside the through hole 22 in the positioning groove 20, which is in contact with the rotating groove 14. At the same time, the limit rod 19 abuts against one end of the abutment rod 23, which is movably inserted into the through hole 22. The end of the through hole 22 that is in contact with the inside of the positioning groove 20 extends outward. The other end of the slider 6 protrudes outward with the abutment rod 23; S2 is as follows: after the slider 6 is inserted into the rotating block 15, the abutment balls 25 set on the upper and lower sides of the slider 6 abut against the other end of the abutment rod 23 inserted into the mating groove 16, and the abutment rod 23 is inserted into the rotating groove 14 through the through hole 22, thereby squeezing out the limiting rod 19 inserted in the through hole 22, thereby forming a meshing whole between the slider 6 and the rotating block 15 for rotation; since the limiting rod 19 is withdrawn from the through hole 22, the rotating block 15 can drive the slider 6 to rotate in the rotating groove 14; It should be noted that when the rotating block 15 and the slider 6 are released from the limiting mechanism and rotate, the end point of the abutment rod 23 in the through hole 22 remains at the same height as the outer periphery of the positioning ring 21 on the outer periphery of the rotating block 15, and in conjunction with the attached... Figure 9 As shown, the contact points of the abutment rod 23 and the limit rod 19 are both spherical, which will not affect the rotation of the rotating block 15 in the rotating groove 14. Furthermore, the abutment ball 25 in the slider 6 will be inserted into the through hole 22. By using the abutment ball 25 inserted into the through hole 22 and the mating block 24 inserted into the mating groove 16, a double lock is formed between the slider 6 and the rotating block 15, which facilitates the synchronous rotation of the slider 6 and the rotating block 15 as a whole. Furthermore, the surface of the positioning ring 21 and the inner wall of the positioning groove 20 are provided with annular magnetic components. Only when the opening of the rotating block 15 corresponds to the slide rail 2 are the two sets of magnetic components in a state of mutual attraction and fixation between opposite magnetic poles. When the rotating block 15 rotates, the two sets of magnetic components will repel each other due to the same magnetic poles, which facilitates the rotation and reset of the rotating block 15.

[0034] It should be noted that the slider 6 is designed to slide and engage with the slide rail 2 in an I-shape, and the inward concavity of the middle of the slider 6 is compatible with the width of the slide rail 2. Therefore, the slider 6 can only slide back and forth within the slide rail 2 and cannot rotate. Additionally, the front end of the machine body 1 is equipped with two sets of independent sleeves 8 and the cutting parts 5 are installed through the cutting shaft 11. The two sets of independent cutting parts 5 are respectively connected to the obstacle-crossing mechanism on the corresponding side, which can ensure that the two sides of the lawnmower body 1 can independently cross obstacles when they encounter obstacles.

[0035] At the same time, combined with the appendix Figure 5As shown in the upper right corner, the circle is the sleeve 8, and the square in the middle is the slot for slidingly inserting the rack 10. This slot and the rack 10 have a damping effect. At the same time, the top dimension of the cutting shaft 11 is larger than the bottom dimension, and the bottom opening dimension of the sleeve 8 is smaller than the internal through groove dimension. By utilizing the smaller bottom opening dimension of the sleeve 8 than the top dimension of the cutting shaft 11, the cutting shaft 11 can be confined within the sleeve 8 and cannot be disengaged. In the initial state, the cutting shaft 11 is located at the bottommost position. Only when crossing an obstacle will the gear 7 drive the rack 10 to pull the cutting shaft 11 upward. During reset, the cutting shaft 11 slides downward and resets due to the weight of the motor, the cutting component 5, and the cutting shaft 11 itself.

[0036] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A remote-controlled lawnmower with obstacle-crossing and obstacle-clearing capabilities, comprising: The body (1) has two sets of independent sleeve rods (8) fixedly installed at the bottom front end in a parallel manner; characterized in that it further includes: Triangular shaft (3), the triangular shaft (3) is set on both sides of the front end of the machine body (1) and three independent moving wheels (4) are rotatably installed; The slider (6) is fixedly connected to the inside of the triangular shaft (3) and slidably connected to the slide rail (2); Cutting shaft (11), which is movably inserted into the bottom end of sleeve (8); The obstacle-crossing mechanism is located inside the slider (6). The obstacle-crossing mechanism is connected to the slider (6) in a transmission. When the slider (6) slides to the end state in the slide rail (2), the slider (6) and the rotating block (15) form a whole and release the limiting mechanism from limiting the rotation of the rotating block (15). By using the resistance of the obstacle to the moving wheel (4), the triangular shaft (3) is driven to rotate and the obstacle is crossed. While the triangular shaft (3) is rotating, the height of the cutting shaft (11) and the cutting part (5) is raised, and the cutting part (5) is protected while crossing the obstacle.

2. A remote-controlled lawnmower with obstacle-crossing and obstacle-clearing capabilities according to claim 1, characterized in that, The front sides of the machine body (1) are provided with slide rails (2). The slide rails (2) are divided into two sections, one long and one short, and are separated by locking blocks (13) on the upper and lower side walls. The long section of the slide rail (2) is the front end, which provides a buffer for the moving wheels (4) under friction during daily use of the lawnmower body (1). The short section of the slide rail (2) is the end, which drives the triangular shaft (3) to rotate when the lawnmower is crossing obstacles.

3. A remote-controlled lawnmower with obstacle-crossing and obstacle-clearing capabilities according to claim 2, characterized in that, A cutting shaft (11) is slidably inserted into the sleeve (8). A cutting component (5) is installed at the bottom of the cutting shaft (11). A rack (10) is fixedly connected to the top of the cutting shaft (11). The rack (10) is slidably inserted into the sleeve (8).

4. A remote-controlled lawnmower with obstacle-crossing and obstacle-clearing capabilities according to claim 3, characterized in that, The obstacle-crossing mechanism includes a slider (6) fixedly installed inside the triangular shaft (3). The slider (6) is slidably connected in the slide rail (2). The slide rail (2) has a rotating groove (14) at its end. A rotating block (15) is rotatably connected in the rotating groove (14). The rotating block (15) is a circle with an opening on one side, and the opening size corresponds to the width of the slide rail (2). The rotating block (15) has symmetrically arranged docking grooves (16) on the upper and lower sides inside. A docking block (24) is detachably and slidably engaged in the docking groove (16). The docking block (24) is fixedly arranged on the upper and lower sides of the slider (6), and the docking block (24) itself has elastic deformation characteristics.

5. A remote-controlled lawnmower with obstacle-crossing and obstacle-clearing capabilities according to claim 4, characterized in that, A gear (7) is fixedly connected to the inner side of the slider (6). The gear (7) is slidably and separably inserted into the slot (9) and meshes with one side of the rack (10).

6. A remote-controlled lawnmower with obstacle-crossing and obstacle-clearing capabilities according to claim 5, characterized in that, The slider (6) has an I-shaped cross-section, and the inner wall of the slider (6) that is slidably connected to the slide rail (2) is a cuboid whose size is adapted to the width of the slide rail (2).

7. A remote-controlled lawnmower with obstacle-crossing and obstacle-clearing capabilities according to claim 6, characterized in that, The inner wall of the rotating groove (14) is provided with a positioning groove (20), and a positioning ring (21) is magnetically rotatably connected in the positioning groove (20). The positioning ring (21) is fixedly sleeved on the outer periphery of the rotating block (15).

8. A remote-controlled lawnmower with obstacle-crossing and obstacle-clearing capabilities according to claim 7, characterized in that, One side of the slider (6) is connected to the inner wall of the rotating block (15) via a compression spring (12).

9. A remote-controlled lawnmower with obstacle-crossing and obstacle-clearing capabilities according to claim 8, characterized in that, The limiting mechanism includes a contact ball (25) that is slidably inserted into the end face of the docking block (24) via a contact spring (26). The contact ball (25) slidably contacts the top end of the contact rod (23). The contact rod (23) is slidably inserted into the through hole (22). The through hole (22) is located inside the center of the docking groove (16). The through hole (22) has sliding grooves (27) on both sides and is slidably connected to the limiting plate (28) via a return spring (29). The limiting plate (28) is fixedly connected to the outer periphery of the middle part of the contact rod (23). The bottom end of the contact rod (23) slidably contacts the top end of the limiting rod (19). The bottom end of the limiting rod (19) is movably inserted into the folding hole (18) via a limiting spring (30). The folding hole (18) is symmetrically opened on the upper and lower side walls of the rotating groove (14).

10. A remote-controlled lawnmower with obstacle-crossing and obstacle-clearing capabilities according to claim 9, characterized in that, The initial state of the limiting rod (19) presses against the bottom end of the abutment rod (23) and is inserted into the through hole (22) to restrict the rotating block (15) rotatably connected in the rotating groove (14).

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