Lawn mower device with automatic kickback protection mechanism and method thereof

Abstract

This invention relates to the field of lawnmower technology, and in particular to a lawnmower device and method with an automatic rebound protection mechanism. The device includes an automatic rebound column located on the top side of a rotating shaft, with the column's axis aligned with the shaft's axis. An embedded rod is elastically connected to the inner top wall of the column, and this embedded rod is connected to a cutting rope. The cutting rope retracts into the rotating shaft as the embedded rod moves. A transmission disconnection assembly is located on the outer wall of the embedded rod, used to connect and disconnect the rotating column when disconnected. The ground contact state is sensed by a caster wheel, and the axial displacement of the embedded rod directly triggers the linkage between the transmission disconnection assembly and the rope retraction mechanism. A fixed spring automatically presses the embedded rod downwards, simultaneously completing the rotation shaft transmission disconnection and the cutting rope retraction. The entire process is purely mechanically driven, with a simple structure and reliable operation, fundamentally eliminating the safety hazards caused by the exposed rotation of the cutting rope when not weeding.

Description

Technical Field

[0001] This invention relates to the field of lawnmower technology, and more particularly to a lawnmower device and method with an automatic rebound protection mechanism. Background Technology

[0002] Lawn mowers are widely used mechanical equipment in garden maintenance. Their cutting methods mainly include blade cutting and rope cutting. Among them, rope mowers use high-speed rotating cutting ropes to cut weeds, and have the advantages of simple structure, low maintenance cost, and good adaptability to hard obstacles.

[0003] However, existing rope mowers have obvious safety hazards in actual use: when the operator lifts, moves, or places the mower in a non-weeding area, the cutting rope remains exposed and rotating, which can easily cause cuts to the operator or people around them; at the same time, the exposed cutting rope is also easily entangled or damaged by obstacles when not in use, shortening its service life. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the safety hazards posed by the aforementioned cutting rope, this invention is proposed.

[0006] Therefore, the object of the present invention is to provide a lawnmower device and method with an automatic rebound protection mechanism.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a lawnmower device with an automatic rebound protection mechanism, comprising a cutting platform, a rotating shaft, and a cutting rope, and further comprising... An automatic rebound column is located on the top side of the rotating shaft, and the axis of the automatic rebound column is consistent with the axis of the rotating shaft. An embedded rod is elastically connected to the inner top wall of the automatic rebound column. The embedded rod penetrates and is embedded inside the rotating column. The outer wall of the embedded rod does not come into contact with the inner wall of the rotating column. The embedded rod is connected to the cutting rope. The cutting rope retracts into the interior of the rotating shaft as the embedded rod moves. A transmission disconnection assembly is disposed on the outer wall of the embedded rod and is used to connect and disconnect the transmission of the disconnected rotating column; The transmission connection and separation of the transmission disconnection component are related to the movement state of the embedded rod. When the embedded rod moves upward in contact with the weeding ground, its transmission disconnection component will connect the disconnected rotating column. When the cutting fixing table is lifted, the embedded rod moves downward elastically, and the disconnected rotating shaft is disconnected.

[0008] As a preferred embodiment of the lawnmower device with automatic rebound protection mechanism described in this invention, the top of the cutting station is provided with a transmission component, the cutting station is connected to a rotating shaft, the top of the rotating shaft is equipped with a transmission gear, the transmission gear and the transmission component are connected by a belt, one end of the rotating shaft is equipped with a cutting rotating disk, and the cutting rope connected to the embedded rod extends through the cutting rotating disk into the weed cutting surface area.

[0009] As a preferred embodiment of the lawnmower device with automatic rebound protection mechanism described in this invention, the following features are provided: a bracket is installed on the top of the cutting platform, the bracket is fixedly connected to the automatic rebound column, a fixing spring is installed on the inner top wall of the automatic rebound column, an embedded rod is installed at the bottom end of the fixing spring, a connecting bearing is installed on the outer wall of the embedded rod, two sets of bending rollers are installed on the inner wall of the rotating column, a movable plate is provided between the two sets of bending rollers, a movable connecting rod is movably connected to one side of the outer wall of the movable plate through a pin, one end of the movable connecting rod is connected to the outer ring of the connecting bearing through a pin, and a caster wheel is installed at the bottom end of the embedded rod.

[0010] As a preferred embodiment of the lawnmower device with automatic rebound protection mechanism described in this invention, the universal wheel contacts the ground of the weeding area. When weeding, the embedding rod moves upward because the cutting fixing table is in contact with the ground. At this time, the embedding rod loosens the cutting rope, and the moving plate moves toward the axis of rotation, so that the cutting rope is in its longest state on the cutting rotating disk.

[0011] As a preferred embodiment of the lawnmower device with automatic rebound protection mechanism described in this invention, when the caster wheel is not in contact with the ground, the fixed spring restores the embedded rod, the embedded rod moves down and pulls the cutting rope into the rotating shaft through the bending roller, and the downward movement of the embedded rod drives the moving plate to move through the connecting bearing and the movable connecting rod, so that the cutting rope in the two sets of bending rollers is bent and contracted by the pressure, so that the longer cutting rope can be quickly retracted into the rotating shaft.

[0012] As a preferred embodiment of the lawnmower device with automatic rebound protection mechanism described in this invention, the transmission disconnection assembly includes an upper fixed bearing and a lower fixed bearing mounted on the cutting fixed platform. The upper fixed bearing and the lower fixed bearing respectively support and connect the disconnected rotating shaft. A protrusion is installed on the outer wall of the embedded rod. A small bearing is installed on the outer wall of the embedded rod in the area of ​​the protrusion. A connecting rod is installed on the outer ring of the small bearing. A connecting internal gear ring is installed at one end of the connecting rod. The connecting internal gear ring is located between the upper fixed bearing and the lower fixed bearing, and the inner ring tooth groove area of ​​the connecting internal gear ring is always connected to the inner ring of the lower fixed bearing. A touch-unlocking component is provided on the small bearing.

[0013] As a preferred embodiment of the lawnmower device with automatic rebound protection mechanism described in this invention, when the embedded rod returns to its original position and moves downward, the inner ring connecting the inner gear ring and the inner ring of the upper fixed bearing is in a state of gradual separation until the inner gear ring connecting the inner gear ring and the inner ring of the upper fixed bearing are completely separated.

[0014] As a preferred embodiment of the lawnmower device with automatic rebound protection mechanism described in this invention, the touch-unlocking component includes a touch rod disposed in the inner ring of a small bearing, a support spring installed on the inner wall of the inner ring of the small bearing, a locking plate installed at one end of the support spring, the locking plate being connected to the inner wall of the inner ring of the small bearing by a connecting belt, the connecting belt being located at one end of the touch rod, the locking plate being located on one side of the protrusion, and a groove being formed on the outer wall of the protrusion.

[0015] As a preferred embodiment of the lawnmower device with automatic rebound protection mechanism described in this invention, when the embedding rod moves up or down, the embedding rod first drives the small bearing and the connecting inner gear ring to move synchronously. After the connecting inner gear ring has moved, the contact rod at the upper or lower end of the small bearing is pressed, and the contact rod separates the clamping plate from the groove, so that the subsequent influence of the embedding rod does not affect the connection state of the connecting inner gear ring.

[0016] A method of using a lawnmower with an automatic rebound protection mechanism, comprising the following steps: S1. Place the lawnmower device on the ground area to be weeded, so that the bottom of the cutting platform is in contact with the ground. The casters are supported by the ground, and the embedded rod moves upward against the elastic force of the fixed spring. The convex strip drives the small bearing and the connecting inner gear ring to move upward synchronously, so that the connecting inner gear ring meshes with the inner ring grooves of the upper and lower fixed bearings at the same time, and the disconnected rotating shaft is connected for transmission. The cutting rope is at its longest cutting length on the cutting rotating disc and performs normal weeding operation. S2. When the cutting platform is raised and separated from the weeding ground, the caster loses ground support, the fixed spring presses down on the embedding rod, the embedding rod moves down and pulls the cutting rope through the two sets of bending rollers into the interior of the rotating shaft. At the same time, the connecting bearing drives the movable link to bend, the bending of the movable link drives the moving plate to move towards the axis of the rotating shaft, the moving plate squeezes the cutting rope between the two sets of bending rollers, causing the cutting rope to bend and contract further and retract into the interior of the cutting rotating disk and the rotating shaft more quickly; S3. During the downward movement of the embedded rod, the small bearing and the connecting inner gear ring are moved downward synchronously by the convex strip. The connecting inner gear ring gradually separates from the inner ring of the upper fixed bearing until the connecting inner gear ring is completely separated from the upper fixed bearing. At this time, the small bearing moves to the limit position, the contact rod contacts the rotating shaft and is displaced, the contact rod presses the connecting belt and bends it, the connecting belt drives the clamping plate to move, the clamping plate separates from the groove on the convex strip, and the locking state between the convex strip and the small bearing is released. S4. After the convex strip and the small bearing are released from locking, the subsequent downward movement of the embedded rod no longer drives the small bearing. The position of the connecting internal gear ring on the outside of the small bearing is maintained. The disconnected rotating shaft no longer makes transmission connections. The cutting rotating disk gradually stops rotating. The cutting rope is completely retracted into the interior of the cutting rotating disk and the rotating shaft and is not exposed at the bottom of the cutting station.

[0017] Beneficial effects The technical solution provided by this invention, compared with known prior art: I. Achieving pure mechanical automatic protection with rapid response and high reliability: This invention senses the ground contact status through the universal wheel and directly triggers the linkage action of the transmission disconnection component and the rope retraction mechanism by utilizing the axial displacement of the embedded rod. It does not require electronic sensors or external power supply, avoiding risks such as failure of the electronic control system, false triggering or delayed response. When the lawnmower is lifted off the ground, the fixed spring automatically presses the embedded rod down, simultaneously completing the rotation shaft transmission disconnection and the retraction of the cutting rope. The entire process is purely mechanically driven, with a simple structure and reliable operation, fundamentally eliminating the safety hazards caused by the exposed rotation of the cutting rope when not weeding. Second, through the ingenious design of the touch-unlock mechanism, the locking state with the convex strip is released only after the insert rod completely separates from the connecting inner gear ring and the upper fixed bearing; at the same time, the position of the connecting inner gear ring is maintained after the locking is released, and even if the insert rod continues to move down, the rotating shaft remains reliably disconnected, and the cutting rope is completely retracted into the rotating shaft and not exposed at the bottom of the cutting fixed platform, achieving dual and thorough protection of power cutting and rope concealment, significantly improving the safety of lawnmower use. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an overall schematic diagram of a lawnmower device with an automatic rebound protection mechanism.

[0020] Figure 2 This is a bottom schematic diagram of a lawnmower device with an automatic rebound protection mechanism.

[0021] Figure 3 This is a schematic diagram of an automatic rebound column of a lawnmower device with an automatic rebound protection mechanism.

[0022] Figure 4 for Figure 3 Enlarged view of point A in the image.

[0023] Figure 5 for Figure 3 Enlarged view of point B in the image.

[0024] Figure 6 This is a schematic diagram of the connecting internal gear ring of a lawnmower device with an automatic rebound protection mechanism.

[0025] Figure 7 This is a schematic diagram of a raised strip on a lawnmower device with an automatic rebound protection mechanism.

[0026] Figure 8 for Figure 7 Enlarged view of point C in the image.

[0027] Reference numerals: 1. Cutting station; 11. Transmission assembly; 12. Transmission gear; 13. Rotating shaft; 14. Cutting rotary disk; 15. Cutting rope; 2. Automatic return column; 21. Bracket; 22. Fixing spring; 23. Embedded rod; 24. Connecting bearing; 25. Bending roller; 26. Movable connecting rod; 27. Moving plate; 28. Caster wheel; 3. Transmission disconnect assembly; 31. Upper fixed bearing; 32. Lower fixed bearing; 33. Connecting internal gear ring; 34. Protrusion; 35. Small bearing; 36. Connecting rod; 37. Press-to-unlock component; 371. Contact rod; 372. Support spring; 373. Clamping plate; 374. Connecting belt; 375. Groove. Detailed Implementation

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0030] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0031] Secondly, the present invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of the present invention. In addition, actual fabrication should include three-dimensional spatial dimensions of length, width, and depth.

[0032] Reference Figure 1 - Figure 8 This is one embodiment of the present invention, which provides a lawnmower device with an automatic rebound protection mechanism, including a cutting station 1, a rotating shaft 13, a cutting rope 15, an automatic rebound column 2, and a transmission disconnection assembly 3.

[0033] Specifically, a transmission assembly 11 is fixedly installed on the top of the cutting platform 1. A rotating shaft 13 is rotatably connected to the middle of the cutting platform 1 via a bearing. A transmission gear 12 is fixedly installed on the top of the rotating shaft 13. The transmission gear 12 and the output end of the transmission assembly 11 are connected by a belt. The bottom end of the rotating shaft 13 extends out of the bottom of the cutting platform 1, and a cutting rotating disk 14 is fixedly installed on the bottom end of the rotating shaft 13. A rope outlet hole is opened circumferentially on the edge of the cutting rotating disk 14. One end of the cutting rope 15 is fixedly connected to the bottom end of the embedded rod 23, and the other end of the cutting rope 15 extends through the rope outlet hole on the cutting rotating disk 14 to the outside of the cutting rotating disk 14, forming a free cutting end. During weeding operations, the cutting rotating disk 14 drives the cutting rope 15 to rotate at high speed, and the free end of the cutting rope 15 is used to cut the weeds.

[0034] Specifically, the automatic rebound column 2 is located directly above the rotating shaft 13, and the axis of the automatic rebound column 2 is on the same straight line as the axis of the rotating shaft 13. A bracket 21 is bolted to the top of the cutting fixing table 1. The bracket 21 has an inverted L-shaped structure, and its horizontal end is fixedly connected to the outer wall of the automatic rebound column 2 by welding or bolting, thus suspending the automatic rebound column 2 above the rotating shaft 13. The automatic rebound column 2 is a hollow cylindrical shell structure. A fixing spring 22 is fixedly installed on the inner top wall of the automatic rebound column 2. The fixing spring 22 is vertically oriented, and its top end is welded to the inner top wall of the automatic rebound column 2. An embedded rod 23 is fixedly connected to the bottom end of the fixing spring 22. The embedded rod 23 is a slender rod-shaped structure. The top end of the embedded rod 23 extends into the interior of the automatic rebound column 2 and is fixedly connected to the bottom end of the fixed spring 22. The bottom end of the embedded rod 23 extends downward and passes through the central through hole of the rotating shaft 13. A gap is reserved between the outer wall of the embedded rod 23 and the inner wall of the rotating shaft 13, so that the two do not come into contact. This ensures that the embedded rod 23 can slide freely along the axis inside the rotating shaft 13 without being affected by the rotational movement of the rotating shaft 13. A universal wheel 28 is installed at the bottom end of the embedded rod 23. The universal wheel 28 is rotatably connected to the bottom end of the embedded rod 23 through a bearing, so that the universal wheel 28 can adapt to the uneven ground and roll smoothly during weeding.

[0035] Specifically, a connecting bearing 24 is fixedly installed in the middle of the outer wall of the embedded rod 23, and the inner ring of the connecting bearing 24 is fixedly connected to the outer wall of the embedded rod 23 with an interference fit. Two sets of bending rollers 25 are symmetrically installed radially on the inner wall of the rotating shaft 13. Each set of bending rollers 25 includes two parallel guide rollers, which are rotatably connected to the inner wall of the rotating shaft 13 by pins. A movable plate 27 is provided in the area between the two sets of bending rollers 25. The movable plate 27 has an arc-shaped plate structure, and the arc-shaped outer wall of the movable plate 27 is adapted to the arc of the inner wall of the rotating shaft 13. A movable connecting rod 26 is movably connected to one side of the outer wall of the movable plate 27 by a pin, and the other end of the movable connecting rod 26 is movably connected to the outer ring of the connecting bearing 24 by a pin. When the embedded rod 23 moves axially, the connecting bearing 24 drives the movable connecting rod 26 to swing, and the swing of the movable connecting rod 26 pushes or pulls the movable plate 27 to move radially along the rotating shaft 13. After the cutting rope 15 is led out from the bottom end of the embedded rod 23, it passes around the guide rollers of the two sets of bending rollers 25 in sequence, then passes through the gap between the moving plate 27 and the bending rollers 25, and finally extends out from the rope outlet hole of the cutting rotary disk 14. When the moving plate 27 moves towards the axis of the rotating shaft 13, the moving plate 27 exerts a squeezing effect on the cutting rope 15 between the two sets of bending rollers 25, causing the cutting rope 15 to bend and deform, thereby shortening the effective length of the cutting rope 15 outside the rotating shaft 13.

[0036] Specifically, the transmission disconnect assembly 3 is mounted on the cutting station 1 to realize the transmission connection and disconnection of the disconnected rotating shaft 13. The transmission disconnect assembly 3 includes an upper fixed bearing 31 and a lower fixed bearing 32. The outer rings of the upper fixed bearing 31 and the lower fixed bearing 32 are fixedly installed in the bearing seat of the cutting station 1. The upper fixed bearing 31 and the lower fixed bearing 32 respectively provide rotational support for the upper and middle parts of the rotating shaft 13. The rotating shaft 13 is disconnected at the position between the upper fixed bearing 31 and the lower fixed bearing 32, forming an upper shaft section and a lower shaft section. An axial clearance is left between the upper shaft section and the lower shaft section. The inner ring of the upper fixed bearing 31 is fixedly connected to the upper shaft section, and the inner ring of the lower fixed bearing 32 is fixedly connected to the lower shaft section. A protrusion 34 is fixedly installed axially on the outer wall of the embedded rod 23. The protrusion 34 and the embedded rod 23 are integrally formed or welded together. A small bearing 35 is installed on the outer wall of the embedded rod 23 in the area of ​​the protrusion 34. A gap is reserved between the inner ring of the small bearing 35 and the outer wall of the embedded rod 23, allowing the small bearing 35 to slide relative to the embedded rod 23 along its axial direction. A connecting rod 36 is fixedly installed on the outer ring of the small bearing 35. One end of the connecting rod 36 is welded to the outer ring of the small bearing 35, and the other end of the connecting rod 36 is fixedly installed with a connecting internal gear ring 33. The connecting internal gear ring 33 is located between the upper fixed bearing 31 and the lower fixed bearing 32. The inner ring of the connecting internal gear ring 33 has a toothed groove. The lower toothed groove of the connecting internal gear ring 33 is always engaged with the outer tooth of the inner ring of the lower fixed bearing 32. The upper toothed groove of the connecting internal gear ring 33 is initially separated from the outer tooth of the inner ring of the upper fixed bearing 31.

[0037] Furthermore, the small bearing 35 is provided with a pressure-activated unlocking component 37, which includes a contact rod 371, a support spring 372, a locking plate 373, a connecting band 374, and a groove 375. The contact rod 371 is movably disposed on the side wall of the inner ring of the small bearing 35, with one end extending out of the inner wall of the inner ring and the other end located inside the inner ring. The support spring 372 is fixedly installed on the inner wall of the inner ring of the small bearing 35, with one end welded to the inner wall and the other end fixedly connected to the locking plate 373. The locking plate 373 is flexibly connected to the inner wall of the inner ring of the small bearing 35 via the connecting band 374, which is located at the inner end of the contact rod 371, allowing the contact rod 371 to press against the connecting band 374 when it moves inward. The retaining plate 373 is located on one side of the protrusion 34, and the outer wall of the protrusion 34 has a groove 375 that matches the shape of the retaining plate 373. In the initial state, the support spring 372 is in a naturally extended state, and the retaining plate 373 is embedded in the groove 375, so that the small bearing 35 and the protrusion 34 form a locking engagement. At this time, the axial movement of the inserting rod 23 can drive the small bearing 35 to move synchronously through the engagement between the protrusion 34 and the retaining plate 373.

[0038] Furthermore, during weeding operations, the operator places the lawnmower device on the ground area to be weeded, ensuring the bottom of the cutting platform 1 is in contact with the ground. At this time, the caster wheel 28 contacts the ground and receives an upward supporting force from it. Under this supporting force, the embedded rod 23 overcomes the elastic force of the fixing spring 22 and moves upward. During the upward movement of the embedded rod 23, the small bearing 35 and the connecting internal gear ring 33 move upward synchronously via the convex strip 34. The upper tooth groove of the connecting internal gear ring 33 gradually approaches the outer tooth of the inner ring of the upper fixed bearing 31, until the connecting internal gear ring 33 simultaneously engages with the inner tooth grooves of both the upper fixed bearing 31 and the lower fixed bearing 32, thereby connecting the upper and lower shaft sections of the disconnected rotating shaft 13. At this time, the transmission assembly 11 drives the transmission gear 12 to rotate via the belt. The transmission gear 12 drives the upper shaft section to rotate. The upper shaft section drives the lower shaft section to rotate synchronously via the connecting internal gear ring 33. The lower shaft section drives the cutting rotary disk 14 to rotate. The cutting rope 15 is at its longest cutting length on the cutting rotary disk 14 and performs normal weeding operations. At the same time, the embedded rod 23 moves upward and drives the movable connecting rod 26 to unfold via the connecting bearing 24. The movable connecting rod 26 pushes the moving plate 27 to move away from the axis of rotation 13. The cutting rope 15 between the two sets of bending rollers 25 is in a slack state, which does not affect the normal extension length of the cutting rope 15.

[0039] Furthermore, when the weeding operation is completed or the cutting station 1 is accidentally lifted and separated from the weeding ground, the caster wheel 28 loses its upward support from the ground. At this time, the fixed spring 22 releases its stored elastic potential energy and presses down on the embedded rod 23. During the downward movement of the embedded rod 23, it first drives the small bearing 35 and the connecting inner gear ring 33 to move down synchronously through the convex strip 34. The upper tooth groove of the connecting inner gear ring 33 gradually separates from the outer tooth of the inner ring of the upper fixed bearing 31. At the same time, the embedded rod 23 pulls the cutting rope 15 through the guide of the two sets of bending rollers 25 and pulls it into the interior of the rotating shaft 13. During this process, the embedded rod 23 drives the movable connecting rod 26 to bend through the connecting bearing 24. The bending of the movable connecting rod 26 drives the moving plate 27 to move towards the axis of the rotating shaft 13. The moving plate 27 squeezes the cutting rope 15 between the two sets of bending rollers 25, causing the cutting rope 15 to bend and contract further and accelerate its retraction into the interior of the cutting rotating disk 14 and the rotating shaft 13.

[0040] Furthermore, when the connecting internal gear ring 33 is completely separated from the upper fixed bearing 31, the small bearing 35 moves to its axial travel limit position. At this time, the contact rod 371 on the inner ring of the small bearing 35 contacts the inner wall of the rotating shaft 13 or the end face of the lower fixed bearing 32 and moves inward. The contact rod 371 presses against the connecting band 374, causing it to bend and deform. The bending of the connecting band 374 drives the clamping plate 373 to move away from the protrusion 34, overcoming the elastic force of the support spring 372. The clamping plate 373 is completely separated from the groove 375 on the protrusion 34, and the locking state between the protrusion 34 and the small bearing 35 is released. After that, the inserting rod 23 continues to move downward under the continued action of the fixed spring 22. However, since the protrusion 34 and the small bearing 35 have been released from locking, the subsequent downward movement of the inserting rod 23 no longer drives the small bearing 35. The position of the small bearing 35 and the connecting internal gear ring 33 on its outer side is maintained at the current position, that is, the connecting internal gear ring 33 remains separated from the upper fixed bearing 31. The disconnected rotating shaft 13 is no longer connected to the transmission. The cutting rotating disk 14 gradually stops rotating due to inertia. The cutting rope 15 is completely retracted into the cutting rotating disk 14 and the rotating shaft 13 and is not exposed at the bottom of the cutting station 1, thus effectively avoiding the safety hazards caused by the exposed cutting rope 15 when not weeding.

[0041] Operating Procedure: During normal cutting, the cutting rope 15 is at its normal cutting length. At this time, the disconnected rotating shaft 13 is also connected to the internal gear ring 33 for transmission. The internal gear ring 33 engages the upper fixed bearing 31 with the inner ring of the lower fixed shaft via toothed blocks. When the cutting platform 1 is raised (too high from the weeding ground, posing a safety hazard to the cutting rope 15), the compressed, stored fixing spring 22 pushes downwards against the embedding rod 23. The embedding rod 23 moves downwards, pulling the cutting rope 15. The cutting rope 15 is then pulled into the rotating shaft 13 by the two sets of bending rollers 25. When the insert rod 23 moves downward, it drives the connecting bearing 24 to move. The movement of the connecting bearing 24 causes the movable connecting rod 26 to bend. The bending of the movable connecting rod 26 causes the moving plate 27 to squeeze the cutting rope 15 between the two sets of bending rollers 25, which further accelerates the bending and contraction of the cutting rope 15. This allows the longer cutting rope 15 to be completely retracted into the interior of the cutting rotary disk 14 and the rotating shaft 13, so that the cutting rope 15 is not exposed at the bottom of the cutting fixed table 1, which greatly improves the cutting safety. During the downward movement of the insert rod 23, the insert rod 23 drives the small bearing 35 to move (at this time, the clamping plate...). 373 is embedded in the groove 375 of the protrusion 34, so that the small bearing 35 is locked on the protrusion 34. The movement of the small bearing 35 drives the connecting rod 36 to move, and the movement of the connecting rod 36 drives the connecting internal gear ring 33 to move. The connecting internal gear ring 33 moves down and gradually separates from the inner ring of the upper fixed bearing 31. When the connecting internal gear ring 33 is completely separated from the upper fixed bearing 31, its small bearing 35 also moves to the limit. At this time, the contact rod 371 contacts the rotating shaft 13 and is displaced. The contact rod 371 moves and presses the connecting band 374. The connecting band 374 bends and drives the clamping plate 373 to move. Separating 73 from the groove 375 causes the protrusion 34 to no longer lock with the small bearing 35. This prevents the movement of the embedded rod 23 from driving the small bearing 35, ensuring that the movement of the embedded rod 23 is unaffected by the small bearing 35. It also maintains the state of the connecting internal gear ring 33 on the outer side of the small bearing 35, preventing the disconnected rotating shaft 13 from transmitting power. This causes the cutting disc 14 to gradually stop rotating, giving the lawnmower an automatic rebound protection function when not weeding. The cutting disc 14 and cutting rope 15 are completely safe, effectively improving the safety of the lawnmower.

[0042] Example 2 Reference Figure 1 - Figure 8 This is one embodiment of the present invention, which provides a method of using a lawnmower device with an automatic rebound protection mechanism, including the following steps: S1. Place the lawnmower device on the ground area to be mowed, so that the bottom of the cutting platform 1 is in contact with the ground. The caster wheel 28 is supported by the ground, and the embedded rod 23 moves upward against the elastic force of the fixed spring 22. The small bearing 35 and the connecting inner gear ring 33 move upward synchronously through the convex strip 34, so that the connecting inner gear ring 33 meshes with the inner ring groove of the upper fixed bearing 31 and the lower fixed bearing 32 at the same time, and the disconnected rotating shaft 13 is connected for transmission. The cutting rope 15 is at its longest cutting length on the cutting rotating disk 14 and performs normal weeding operation.

[0043] Specifically, in this step, the caster wheel 28 is in direct contact with the ground and bears the reaction force from the ground. This reaction force is transmitted to the fixed spring 22 through the embedded rod 23, causing the fixed spring 22 to undergo elastic compression deformation. The embedded rod 23 thereby obtains an upward displacement stroke, which in turn triggers the subsequent transmission connection and the chain action of releasing the cutting rope 15.

[0044] S2. When the cutting station 1 is lifted and separated from the weeding ground, the caster wheel 28 loses ground support, the fixed spring 22 presses down on the embedded rod 23, the embedded rod 23 moves down and pulls the cutting rope 15 into the interior of the rotating shaft 13 through the two sets of bending rollers 25. At the same time, the connecting bearing 24 drives the movable connecting rod 26 to bend. The bending of the movable connecting rod 26 drives the moving plate 27 to move towards the axis of the rotating shaft 13. The moving plate 27 squeezes the cutting rope 15 between the two sets of bending rollers 25, causing the cutting rope 15 to bend and contract further and to retract into the interior of the cutting rotating disk 14 and the rotating shaft 13 more quickly.

[0045] Specifically, in this step, the bending roller 25 guides and turns the cutting rope 15, and the radial movement of the moving plate 27 applies additional compressive force to the cutting rope 15. The two work together to make the cutting rope 15 form a folded and stacked state inside the rotating shaft 13, thereby significantly shortening the effective extension length of the cutting rope 15 outside the rotating shaft 13.

[0046] S3. During the downward movement of the embedded rod 23, the small bearing 35 and the connecting inner gear ring 33 are moved downward synchronously through the protrusion 34. The connecting inner gear ring 33 gradually separates from the inner ring of the upper fixed bearing 31 until the connecting inner gear ring 33 is completely separated from the upper fixed bearing 31. At this time, the small bearing 35 moves to the limit position, the contact rod 371 contacts the rotating shaft 13 and is displaced, the contact rod 371 presses the connecting band 374 and bends it, the connecting band 374 drives the clamping plate 373 to move, the clamping plate 373 separates from the groove 375 on the protrusion 34, and the locking state between the protrusion 34 and the small bearing 35 is released.

[0047] Specifically, in this step, the contact position between the contact rod 371 and the rotating shaft 13 is precisely designed to ensure that the contact rod 371 is triggered only after the connecting internal gear ring 33 is completely separated from the upper fixed bearing 31. This ensures that the two actions of transmission disconnection and locking release are accurately connected in timing, avoiding the risk of transmission failure caused by premature unlocking before the connecting internal gear ring 33 is completely separated.

[0048] After the S4, convex strip 34 and small bearing 35 are released from locking, the subsequent downward movement of the embedded rod 23 no longer drives the small bearing 35, the position of the connecting internal gear ring 33 on the outer side of the small bearing 35 is maintained, the disconnected rotating shaft 13 no longer makes transmission connection, the cutting rotating disk 14 gradually stops rotating, and the cutting rope 15 is completely retracted into the interior of the cutting rotating disk 14 and the rotating shaft 13 and is not exposed at the bottom of the cutting fixed table 1.

[0049] Specifically, in this step, the connecting internal gear ring 33 is kept in a stationary position separated from the upper fixed bearing 31, so that a reliable transmission disconnection state is formed between the upper shaft section and the lower shaft section of the rotating shaft 13. Even if the operator accidentally touches the start switch of the transmission component 11, the power cannot be transmitted to the cutting rotating disk 14, which fundamentally eliminates the safety hazard of the cutting rope 15 rotating unexpectedly in the non-weeding state.

[0050] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A lawnmower device with automatic recoil protection mechanism comprising a cutting stationary platform (1), a rotating shaft (13) and a cutting cord (15), characterized in that: It also includes, An automatic rebound column (2) is located on the top side of the rotating shaft (13), and the axis of the automatic rebound column (2) is consistent with the axis of the rotating shaft (13). An embedded rod (23) is elastically connected to the inner top wall of the automatic rebound column (2). The embedded rod (23) penetrates the interior of the rotating column. The outer wall of the embedded rod (23) does not contact the inner wall of the rotating column. The embedded rod (23) is connected to the cutting rope (15). The cutting rope (15) retracts into the interior of the rotating shaft (13) as the embedded rod (23) moves. The transmission disconnection assembly (3) is disposed on the outer wall of the embedded rod (23) for connecting and disconnecting the disconnected rotating column; The transmission connection and separation of the transmission disconnection component (3) are related to the movement state of the embedded rod (23). When the embedded rod (23) moves upward in contact with the weeding ground, its transmission disconnection component (3) will connect the disconnected rotating column. When the cutting fixed table (1) is lifted, the embedded rod (23) moves downward elastically, and the disconnected rotating shaft (13) is disconnected.

2. The lawnmower device with automatic rebound protection mechanism as described in claim 1, characterized in that: The top of the cutting station (1) is provided with a transmission assembly (11). The cutting station (1) is connected to a rotating shaft (13). A transmission gear (12) is installed at the top of the rotating shaft (13). The transmission gear (12) and the transmission assembly (11) are connected by a belt. A cutting rotating disk (14) is installed at one end of the rotating shaft (13). The cutting rope (15) connected to the embedded rod (23) extends through the cutting rotating disk (14) into the weeding cutting area.

3. The lawnmower device with an automatic rebound protection mechanism as described in claim 2, characterized in that: The top of the cutting station (1) is equipped with a bracket (21), which is fixedly connected to the automatic rebound column (2). The inner top wall of the automatic rebound column (2) is equipped with a fixing spring (22), and the bottom end of the fixing spring (22) is equipped with an embedded rod (23). The outer wall of the embedded rod (23) is equipped with a connecting bearing (24). The inner wall of the rotating column is equipped with two sets of bending rollers (25). A movable plate (27) is provided between the two sets of bending rollers (25). The outer wall of one side of the movable plate (27) is movably connected to a movable connecting rod (26) by a pin. One end of the movable connecting rod (26) is connected to the outer ring of the connecting bearing (24) by a pin. The bottom end of the embedded rod (23) is equipped with a universal wheel (28).

4. The lawnmower device with automatic rebound protection mechanism as described in claim 3, characterized in that: The caster wheel (28) contacts the ground of the weeding area. When weeding, the embedded rod (23) moves upward because the cutting fixed table (1) is in contact with the ground. At this time, the embedded rod (23) loosens the cutting rope (15), and the moving plate (27) moves toward the axis of the rotating shaft (13), so that the cutting rope (15) is in its longest state on the cutting rotating disk (14).

5. The lawnmower device with automatic rebound protection mechanism as described in claim 4, characterized in that: When the caster wheel (28) is not in contact with the ground, the fixed spring (22) restores the embedded rod (23). The embedded rod (23) moves down and pulls the cutting rope (15) into the rotating shaft (13) through the bending roller (25). The embedded rod (23) moves down and drives the moving plate (27) to move through the connecting bearing (24) and the movable connecting rod (26), so that the cutting rope (15) in the interval between the two sets of bending rollers (25) is bent and contracted by the touch, so that the longer cutting rope (15) can be quickly retracted into the rotating shaft (13).

6. The lawnmower device with an automatic rebound protection mechanism as described in claim 5, characterized in that: The transmission disconnection assembly (3) includes an upper fixed bearing (31) and a lower fixed bearing (32) mounted on the cutting fixed table (1). The upper fixed bearing (31) and the lower fixed bearing (32) respectively support and connect the disconnected rotating shaft (13). A protrusion (34) is installed on the outer wall of the embedded rod (23). A small bearing (35) is installed on the outer wall of the embedded rod (23) in the area of ​​the protrusion (34). A connecting rod (36) is installed on the outer ring of the small bearing (35). A connecting internal gear ring (33) is installed at one end of the connecting rod (36). The connecting internal gear ring (33) is located between the upper fixed bearing (31) and the lower fixed bearing (32). The inner ring tooth groove area of ​​the connecting internal gear ring (33) is always connected to the inner ring of the lower fixed bearing (32). A touch unlocking element (37) is set on the small bearing (35).

7. The lawnmower device with automatic rebound protection mechanism as described in claim 6, characterized in that: When the embedded rod (23) moves downwards, the inner ring of the connecting internal gear ring (33) and the inner ring of the upper fixed bearing (31) are gradually separated until the inner ring of the connecting internal gear ring (33) and the inner ring of the upper fixed bearing (31) are completely separated.

8. The lawnmower device with automatic rebound protection mechanism as described in claim 7, characterized in that: The touch-unlocking component (37) includes a touch rod (371) disposed in the inner ring of the small bearing (35). A support spring (372) is installed on the inner wall of the inner ring of the small bearing (35). A locking plate (373) is installed at one end of the support spring (372). The locking plate (373) is connected to the inner wall of the inner ring of the small bearing (35) by a connecting band (374). The connecting band (374) is located at one end of the touch rod (371). The locking plate (373) is located on one side of the protrusion (34). A groove (375) is provided on the outer wall of the protrusion (34).

9. The lawnmower device with an automatic rebound protection mechanism as described in claim 8, characterized in that: When the embedded rod (23) moves up or down, the embedded rod (23) first drives the small bearing (35) and the connecting internal gear ring (33) to move synchronously. After the connecting internal gear ring (33) has moved, the contact rod (371) at the upper or lower end of its small bearing (35) is pressed. The contact rod (371) separates the card plate (373) from the groove (375), so that the subsequent influence of the embedded rod (23) does not affect the connection state of the connecting internal gear ring (33).

10. A method of using a lawnmower with an automatic rebound protection mechanism, using the lawnmower device as described in any one of claims 1 to 9, characterized in that, Includes the following steps: S1. Place the lawnmower device on the ground area to be mowed, so that the bottom of the cutting fixed table (1) is in contact with the ground. The caster wheel (28) is supported by the ground. The embedded rod (23) moves upward against the elastic force of the fixed spring (22). The small bearing (35) and the connecting inner gear ring (33) move upward synchronously through the convex strip (34). The connecting inner gear ring (33) meshes with the inner gear groove of the upper fixed bearing (31) and the lower fixed bearing (32) at the same time, and the disconnected rotating shaft (13) is connected for transmission. The cutting rope (15) is at the longest cutting length on the cutting rotating disk (14) and performs normal weeding operation. S2. When the cutting station (1) is lifted and separated from the weeding ground, the caster (28) loses ground support, the fixed spring (22) presses down on the embedded rod (23), the embedded rod (23) moves down and pulls the cutting rope (15) into the interior of the rotating shaft (13) through the steering of the two sets of bending rollers (25). At the same time, the connecting bearing (24) drives the movable connecting rod (26) to bend. The bending of the movable connecting rod (26) drives the moving plate (27) to move towards the axis of the rotating shaft (13). The moving plate (27) squeezes the cutting rope (15) between the two sets of bending rollers (25), so that the cutting rope (15) bends and shrinks further and shrinks into the interior of the cutting rotating disk (14) and the rotating shaft (13) at an accelerated pace. S3. During the downward movement of the embedded rod (23), the small bearing (35) and the connecting inner gear ring (33) are driven to move downward synchronously through the protrusion (34). The connecting inner gear ring (33) gradually separates from the inner ring of the upper fixed bearing (31) until the connecting inner gear ring (33) is completely separated from the upper fixed bearing (31). At this time, the small bearing (35) moves to the limit position, the contact rod (371) contacts the rotating shaft (13) and displacement occurs, the contact rod (371) presses the connecting band (374) to make it bend, the connecting band (374) drives the clamping plate (373) to move, the clamping plate (373) separates from the groove (375) on the protrusion (34), and the locking state between the protrusion (34) and the small bearing (35) is released. After the S4, convex strip (34) and small bearing (35) are unlocked, the subsequent downward movement of the embedded rod (23) no longer drives the small bearing (35), the position of the connecting internal gear ring (33) on the outside of the small bearing (35) is maintained, the disconnected rotating shaft (13) no longer makes transmission connection, the cutting rotating disk (14) gradually stops rotating, and the cutting rope (15) is completely retracted into the interior of the cutting rotating disk (14) and the rotating shaft (13) and is not exposed at the bottom of the cutting fixed table (1).

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