A high-safety garden lawn mower

Abstract

The present application relates to a high-safety garden lawn mower, comprising a mowing assembly, a mounting base, a handle assembly, and a drive assembly. The mounting base is mounted at the bottom end of the handle assembly. An inner shaft and an outer shaft are rotatably connected within the mounting base. The outer shaft is coaxially sleeved on the inner shaft, and the drive assembly drives the outer shaft to rotate. The mowing assembly includes a locking member, a switching member, an upper plate, a lower plate, a plurality of safety ropes, and a plurality of blades. The blades are connected between the upper plate and the lower plate by rivets. The upper and lower plates are coaxially fixed to the inner shaft by locking screws. The switching member is movably mounted on the upper plate. The ends of the safety rope are respectively connected to the switching member and the blades. When the blades are in a normal state, the switching member is connected to the outer shaft, and the upper plate and the outer shaft rotate synchronously. When the blades are separated from the cutter disc, the switching member is separated from the outer shaft, and the locking member locks the switching member in the separated state. If the blades accidentally separate from the cutter disc, the outer shaft will no longer drive the cutter disc to rotate, and the safety rope will pull the blades, thereby improving the safety of the lawn mower during use.

Description

Technical Field

[0001] The present invention relates to the field of lawn mowers, in particular to a high-safety garden lawn mower. Background Art

[0002] A lawn mower is a mechanical tool used to trim lawns, vegetation, etc. It consists of a mounting base, an engine, a cutting piece, and an operating device. The engine drives the cutting piece to rotate to perform weeding operations.

[0003] Cutting elements come in a variety of forms and can be roughly divided into rigid blades and flexible weed ropes. Both have their own advantages and disadvantages in actual use: rigid blades cut weeds cleanly and efficiently, but once they encounter hard objects such as stones, the strong impact can easily cause the blades to deform or even crack. At the same time, the resulting recoil force will also cause strong vibrations in the operator's hands, affecting the operating experience and safety; flexible weed ropes rely on the centrifugal force generated by high-speed rotation to generate cutting force to break weeds, but it is often difficult to cut off tall weeds from the roots, and the weeding effect is somewhat limited.

[0004] In view of the shortcomings of the above two cutting pieces, a multi-leaf blade is now available on the market. The most typical of these multi-leaf blades is a six-leaf blade, such as Figure 1 As shown. This blade 6 is connected to the upper disc 11 and lower disc 12 via rivets 15, and the motor 41 drives the cutter disc. Its ingenuity lies in its unique design, which allows blade 6 to evade impact when it accidentally strikes a hard object such as a rock. This allows blade 6 to automatically and flexibly avoid direct impact, thus reducing the risk of damage to blade 6 itself. In terms of performance, it combines the advantages of a rigid blade 6 and a flexible mowing rope, offering a perfect compromise between the two.

[0005] However, it's important to note that the active connection between the blades and the cutterhead creates vibrations during frequent use due to the high speed of the blades. Frequent impacts, such as the need to cut tough weeds, subject the rivets to significant centrifugal and impact forces. This can lead to fatigue and loosening of the rivet connection, making it difficult to ensure blade connection stability. Compared to the potential damage caused by the cracking of rigid blades and the breaking of flexible mowing ropes, the consequences of a multi-blade blade accidentally detaching from the cutterhead during use can be extremely serious and even life-threatening. Summary of the Invention

[0006] In order to improve the safety of using a multi-blade blade, the present application provides a high-safety garden mower.

[0007] The high-safety garden mower provided by this application adopts the following technical solutions:

[0008] A high-safety garden lawn mower comprises a mowing assembly, a mounting base, a handle assembly and a drive assembly. The mounting base is mounted on the bottom end of the handle assembly. An inner shaft and an outer shaft are rotatably connected in the mounting base. The outer shaft is coaxially sleeved on the inner shaft. The drive assembly is mounted on the handle assembly for driving the outer shaft to rotate.

[0009] The mowing assembly includes a locking part, a switching part, an upper plate, a lower plate, several safety ropes and several blades. The blades are connected between the upper plate and the lower plate by rivets. The upper plate and the lower plate are coaxially fixed to the inner shaft by locking screws. The switching part is movably arranged on the upper plate. Several safety ropes correspond to several blades respectively. The two ends of the safety rope are detachably connected to the switching part and the corresponding blades respectively. When the blade is in a normal state, the switching part drives the upper plate and the outer shaft to rotate synchronously by connecting with the outer shaft; when the blade disengages from the cutter disc and drives the safety rope to fly out, the switching part disengages from the outer shaft, and the locking part is used to lock the disengaged state of the switching part.

[0010] By adopting the above technical solution, under normal conditions, the blade can rotate with the outer shaft and fully open under the action of centrifugal force to efficiently mow the grass; when the blade accidentally detaches from the cutter disc, the switching part detaches from the outer shaft, and the locking part locks its detached state. The rotation of the outer shaft will not continue to drive the cutter disc to rotate. After the cutter disc has no driving force, the speed can only gradually decrease. At the same time, the safety rope pulls the blade, reducing the safety hazards caused by the blade continuing to rotate at high speed due to accidental throwing out, thereby improving the safety of the lawn mower during use. The detachable connection between the blade and the safety rope is convenient for later maintenance and replacement.

[0011] Preferably, the switching member includes a first spring, a movable seat and a plurality of switching rods, the plurality of switching rods corresponding to the plurality of blades respectively, the plurality of switching rods being evenly arranged along the circumferential direction on the top surface of the movable seat, the upper plate being provided with a plurality of through slots, the switching rods sliding in the corresponding through slots along a direction parallel to the rotation axis of the outer shaft, the movable seat being arranged in an annular shape, the movable seat and the plurality of switching rods enclosing the locking screw, the first spring being located below the movable seat, and the first spring driving the movable seat to always move upward;

[0012] The end of the safety rope away from the blade is fixedly mounted on the corresponding switching rod, and its height is higher than the end connected to the blade; a conical tooth groove is provided at the bottom end of the outer shaft, and the top end of the switching rod extends above the upper plate and has a conical tooth surface matching the conical tooth groove.

[0013] By adopting the above technical solution, when the blade is working normally, the conical tooth surface at the top of the switching rod cooperates with the conical tooth groove at the bottom end of the outer shaft, so that the outer shaft can stably drive the upper disk to rotate; and when the blade is separated from the cutter disc by external force, the blade flies out under the action of centrifugal force and pulls the safety rope, and the safety rope then pulls the switching rod downward, overcoming the elastic force of the first spring, and the conical tooth surface at the top of the switching rod separates from the conical tooth groove of the outer shaft, thereby realizing the separation of the switching member from the outer shaft. The structure is simple and the response is sensitive, and the stability and reliability of the switching process are guaranteed by the switching rods evenly arranged circumferentially.

[0014] Preferably, the middle part of the lower plate is recessed downward to form a recessed area, and the bottom surface of the lower plate is located at the center of the recessed area and protrudes upward to form a accommodating area, and the accommodating area is used to accommodate the head of the locking screw; the movable seat slides in the accommodating area, and the first spring is located in the accommodating area, and the two ends of the first spring respectively abut against the movable seat and the bottom surface of the recessed area.

[0015] By adopting the above technical solution, the recessed and accommodating areas of the lower plate provide reasonable installation space for the locking screw, movable seat, and first spring, making the mowing assembly more compact. Furthermore, as the movable seat slides within the accommodating area, the ends of the first spring abut against the movable seat and the bottom surface of the recessed area, respectively, ensuring the stability of the first spring's elastic force and, consequently, the reliability of the switching element.

[0016] Preferably, when the switching member is in the disengaged state, the movable seat abuts against the raised surface of the accommodating area.

[0017] By adopting the above technical solution, when the switching member is in the disengaged state, the movable seat abuts against the raised surface of the accommodating area, providing stable support for the movable seat, preventing the movable seat from shaking at will in the accommodating area, further ensuring the stability of the disengaged state of the switching member, and ensuring that the lawn mower can reliably stop the rotation of dangerous operating parts after the blade is thrown out.

[0018] Preferably, the locking member includes a second spring, an insert block, a reset block and a push diaphragm, and a first sliding groove is radially opened on the side wall of the movable seat, the insert block slides on the first sliding groove, and the two ends of the second spring are respectively fixed on the inner wall of the first sliding groove and the inner wall of the insert block; the lower plate is located on the recessed area and is provided with a second sliding groove, and the reset block slides on the second sliding groove, and one end of the reset block away from the insert block extends out of the lower plate and is fixed to the middle of the push diaphragm, and the circumferential edge of the push diaphragm is fixed on the outer wall of the recessed area of ​​the lower plate. When the switching member is in a disengaged state, the first sliding groove is opposite to the second sliding groove, and the end of the insert block enters the second sliding groove.

[0019] By adopting the above technical solution, when the switching member is in the disengaged state, the plug enters the second slide groove under the action of the second spring, thereby locking the switching member in the disengaged state, preventing the cutter disc from resetting and reconnecting with the outer shaft under the action of the first spring after deceleration, thereby ensuring the safety of the lawn mower in dangerous situations. The setting of the pressing diaphragm and the reset block makes it convenient for the user to press the diaphragm to make the reset block push the plug away from the second slide groove after repairing the detached blade, thereby releasing the lock and reconnecting the switching member to the connected state, which is simple and convenient to operate.

[0020] Preferably, the safety rope includes a rope body, self-locking hooks are fixed at both ends of the rope body, a first hanging ear is provided on the blade, a groove is provided on the side of the switching rod facing the blade, a second hanging ear is provided in the groove, and two self-locking hooks are hooked on the first hanging ear and the second hanging ear respectively.

[0021] By adopting the above technical solution, the safety rope is hooked on the blade and the switching rod through the self-locking hooks at both ends, thereby realizing a detachable connection between the safety rope, the blade and the switching rod. The connection method is simple and reliable, easy to install and disassemble, and conducive to the replacement and maintenance of the safety rope. At the same time, the design of the self-locking hook ensures that the safety rope will not fall off accidentally during normal operation.

[0022] Preferably, the rope body includes an elastic rope in the middle and steel wire ropes at both ends, two self-locking hooks are respectively fixed to the steel wire ropes at both ends, the elastic rope is always located between the upper plate and the lower plate, and the elastic rope is always in a stretched state;

[0023] A plurality of rotation limiting blocks are evenly arranged along the circumferential direction on the bottom surface of the lower plate, and the first hanging ear is arranged on the side surface of the tail end of the blade. When the driving assembly stops running, the blade abuts against the corresponding rotation limiting block and the blade is in a retracted state.

[0024] By adopting the above technical solution, the rope body is composed of an elastic rope in the middle and steel ropes at both ends. The elastic rope is always in a stretched state. When the blade is accidentally thrown out, the elastic buffering effect of the elastic rope can be used to reduce the impact force received by the safety rope in an instant. As the cutter disc continues to rotate, the centrifugal force of the blade will drive the elastic rope to be tightened to the limit state, pulling the switching rod downward to achieve the disengagement of the switching part; the rotation limit block on the bottom surface of the lower plate cooperates with the elastic rope. When the drive assembly stops running, the blade abuts against the rotation limit block and is in a retracted state, which can prevent the blade from rotating at will, thereby improving the safety of the lawn mower when it is idle.

[0025] Preferably, it also includes a brake assembly, which includes a brake disc, a top cover, a third spring, a slider and two sliding rods, the top of the inner shaft is provided with a third sliding groove along the axial direction, the slider slides in the third sliding groove, and the two sliding rods are respectively fixed to the bottom of the slider, and two fourth sliding grooves are provided on the bottom surface of the third sliding groove along the axial direction of the inner shaft, the two sliding rods slide in the fourth sliding groove, and the two sliding rods are respectively located on both sides of the locking screw; the third spring is located in the third sliding groove, and the two ends of the third spring are respectively fixedly arranged on the bottom surface of the third sliding groove and the bottom surface of the slider, the third spring is always in a stretched state, and the bottom end of the sliding rod abuts against the corresponding switching rod;

[0026] The brake disc is coaxially fixed to the top of the slider by screws. The brake disc is located above the inner shaft. The side wall of the brake disc is provided with a first chamfered surface along the circumferential direction. The top of the mounting seat is open and provided with a second chamfered surface matching the first chamfered surface. The first chamfered surface is located directly above the second chamfered surface. When the switching member is in a disengaged state, the first chamfered surface abuts against the second chamfered surface.

[0027] The top cover is fixed to the top of the mounting seat by a plurality of screws, and the brake disc moves inside the top cover.

[0028] By adopting the above technical solution, the brake assembly can function when the switching member is in a disengaged state; when the switching member is disengaged from the outer shaft, the slide rod is no longer supported by the switching rod, and under the action of the third spring, the slider drives the brake disc to move downward, and the first chamfered surface of the side wall of the brake disc abuts against the second chamfered surface at the top of the mounting seat, and the friction force is used to quickly stop the inner shaft from rotating, thereby realizing the emergency braking function and further improving the safety performance of the lawn mower in dangerous situations.

[0029] Preferably, a positioning groove matching the top of the slider is provided on the bottom surface of the brake disc, and the top of the slider is embedded in the positioning groove.

[0030] By adopting the above technical solution, the connection between the brake disc and the slider is made more stable, ensuring that the brake disc will not deviate or shake when moving with the slider, thereby ensuring the reliability of the brake assembly and making the braking effect more stable and effective.

[0031] The technical effects of the present invention are mainly reflected in the following aspects:

[0032] 1. When the blade accidentally detaches from the cutter disc, the switching member disengages from the outer shaft, and the locking member locks the detached state. The rotation of the outer shaft will no longer drive the cutter disc. Without driving force, the cutter disc's rotation speed can only gradually decrease. At the same time, the safety rope holds the blade, reducing the safety hazard caused by the blade accidentally being thrown out while continuing to rotate at high speed. This improves the safety of the lawn mower during use. The detachable connection between the blade and the safety rope facilitates subsequent maintenance and replacement.

[0033] 2. When the blade of the present invention is working normally, the conical tooth surface at the top of the switching lever cooperates with the conical tooth groove at the bottom end of the outer shaft, so that the outer shaft can stably drive the upper disk to rotate; and when the blade is separated from the cutter disc by external force, the blade flies out under the action of centrifugal force and pulls the safety rope, and the safety rope then pulls the switching lever downward, overcoming the elastic force of the first spring, and the conical tooth surface at the top of the switching lever separates from the conical tooth groove of the outer shaft, thereby realizing the separation of the switching member and the outer shaft. The structure is simple and the response is sensitive. In addition, the switching levers are evenly arranged circumferentially to ensure the stability and reliability of the switching process. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural diagram of a traditional six-leaf blade in the related art.

[0035] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0036] Figure 3 This is a structural diagram of the mowing component in the embodiment of the present application when it is not in operation.

[0037] Figure 4 It is along Figure 2 Sectional view along line AA.

[0038] Figure 5 yes Figure 4 Enlarged view of point B in the middle.

[0039] Figure 6 It is a schematic diagram of the partial structure of the switching component of the embodiment of the present application.

[0040] Figure 7 yes Figure 6 Enlarged view of point C in the middle.

[0041] Explanation of reference numerals: 1. mowing assembly; 11. upper plate; 111. through groove; 12. lower plate; 121. recessed area; 122. accommodating area; 123. raised surface; 124. third chamfered surface; 13. protective hollow column; 15. rivet; 161. first spring; 162. moving seat; 163. switching lever; 1631. conical tooth surface; 164. groove; 171. second spring; 172. insert block; 173. reset block; 174. pressing diaphragm; 175. first slide groove; 176. second slide groove; 18. locking screw; 19. rotation limit block; 2. mounting seat; 21. inner shaft; 22. outer shaft; 221. conical tooth groove; 23. protective cover; 3. handle assembly; 3 1. Operating handle; 4. Drive assembly; 41. Engine; 42. Output shaft; 5. Safety rope; 51. Elastic rope; 52. Wire rope; 53. Self-locking hook; 6. Blade; 61. First hanging ear; 62. Second hanging ear; 7. Brake assembly; 71. Brake disc; 711. Positioning groove; 72. Top cover; 73. Third spring; 74. Slider; 75. Sliding rod; 76. Third slide groove; 77. Fourth slide groove; 78. First chamfered surface; 79. Second chamfered surface. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-Figure 7 The present application is further described in detail to make the technical solution of the present application easier to understand and grasp.

[0043] The embodiment of the present application discloses a high-safety garden lawn mower.

[0044] Reference Figure 2-Figure 5 A high-safety garden lawn mower of this embodiment includes a mowing assembly 1, a mounting base 2, a handle assembly 3 and a driving assembly 4. The mounting base 2 is installed at the bottom end of the handle assembly 3. An inner shaft 21 and an outer shaft 22 are rotatably connected in the mounting base 2. The outer shaft 22 is coaxially sleeved on the inner shaft 21. The driving assembly 4 is installed on the handle assembly 3 for driving the outer shaft 22 to rotate.

[0045] Reference Figure 3-Figure 5 The mowing assembly 1 includes a locking part, a switching part, an upper plate 11, a lower plate 12, several safety ropes 5 and several blades 6. The blades 6 are connected between the upper plate 11 and the lower plate 12 by rivets 15. The upper plate 11 and the lower plate 12 are coaxially fixed to the inner shaft 21 by locking screws 18. The switching part is movably arranged on the upper plate 11. Several safety ropes 5 correspond to several blades 6 respectively. The two ends of the safety rope 5 are detachably connected to the switching part and the corresponding blades 6. When the blades 6 are in a normal state, the switching part drives the upper plate 11 and the outer shaft 22 to rotate synchronously by connecting with the outer shaft 22; when the blade 6 disengages from the cutter disc and drives the safety rope 5 to fly out, the switching part disengages from the outer shaft 22, and the locking part is used to lock the disengaged state of the switching part.

[0046] Reference Figure 3-Figure 5 Under normal conditions, the blade 6 can rotate with the outer shaft 22 and be fully opened under the action of centrifugal force for efficient mowing; when the blade 6 accidentally detaches from the cutter disc, the switching member detaches from the outer shaft 22, and the locking member locks its detached state. The rotation of the outer shaft 22 will not continue to drive the cutter disc to rotate. After the cutter disc has no driving force, the speed can only gradually decrease. At the same time, the safety rope 5 pulls the blade 6, reducing the safety hazard caused by the blade 6 continuing to rotate at high speed due to accidental throwing out, thereby improving the safety of the lawn mower during use. The detachable connection between the blade 6 and the safety rope 5 is convenient for later maintenance and replacement.

[0047] Reference Figure 3-Figure 6 The switching member includes a first spring 161, a moving seat 162 and a plurality of switching rods 163. The plurality of switching rods 163 correspond to the plurality of blades 6 respectively. The plurality of switching rods 163 are evenly arranged on the top surface of the moving seat 162 along the circumferential direction. A plurality of through grooves 111 are opened on the upper plate 11. The switching rods 163 slide in the corresponding through grooves 111 along a direction parallel to the rotation axis of the outer shaft 22. The moving seat 162 is arranged in an annular shape. The moving seat 162 and the plurality of switching rods 163 surround the locking screw 18. The first spring 161 is located below the moving seat 162. The first spring 161 drives the moving seat 162 to always move upward.

[0048] Reference Figure 3-Figure 6 The end of the safety rope 5 away from the blade 6 is fixedly mounted on the corresponding switching rod 163, and its height position is higher than the end connected to the blade 6; a conical tooth groove 221 is provided at the bottom end of the outer shaft 22, and the top end of the switching rod 163 extends above the upper plate 11 and has a conical tooth surface 1631 matching the conical tooth groove 221.

[0049] Reference Figure 1 When the blade 6 is working normally, the conical tooth surface 1631 at the top of the switching rod 163 cooperates with the conical tooth groove 221 at the bottom end of the outer shaft 22, so that the outer shaft 22 can stably drive the upper disk 11 to rotate; and when the blade 6 is separated from the cutter disc by external force, the blade 6 flies out under the action of centrifugal force and pulls the safety rope 5, and the safety rope 5 then pulls the switching rod 163 downward, overcoming the elastic force of the first spring 161, and the conical tooth surface 1631 at the top of the switching rod 163 is separated from the conical tooth groove 221 of the outer shaft 22, thereby realizing the separation of the switching member from the outer shaft 22. The structure is simple and the response is sensitive. In addition, the switching rods 163 are evenly arranged around the circumference, which ensures the stability and reliability of the switching process.

[0050] Reference Figure 3-Figure 5The middle part of the lower plate 12 is recessed downward to form a recessed area 121, and the bottom surface of the lower plate 12 is located at the center of the recessed area 121 and protrudes upward to form a receiving area 122. The receiving area 122 is used to receive the head of the locking screw 18; the movable seat 162 slides in the receiving area 122, and the first spring 161 is located in the receiving area 122, and the two ends of the first spring 161 respectively abut against the movable seat 162 and the bottom surface of the recessed area 121.

[0051] Reference Figure 3-Figure 5 The design of the recessed area 121 and the accommodating area 122 of the lower plate 12 provides reasonable installation space for the locking screw 18, the movable seat 162, and the first spring 161, making the structure of the mowing assembly 1 more compact. At the same time, the movable seat 162 slides within the accommodating area 122, and the two ends of the first spring 161 abut against the movable seat 162 and the bottom surface of the recessed area 121, respectively, ensuring the stability of the elastic force of the first spring 161 and thus the reliability of the switching member.

[0052] Reference Figure 3-Figure 5 When the switching member is in the disengaged state, the movable seat 162 abuts against the raised surface 123 of the accommodating area 122 .

[0053] Reference Figure 3-Figure 5 When the switching member is in the disengaged state, the movable seat 162 abuts against the raised surface 123 of the accommodating area 122, providing stable support for the movable seat 162, preventing the movable seat 162 from shaking freely in the accommodating area 122, further ensuring the stability of the disengaged state of the switching member, and ensuring that the lawn mower can reliably stop the rotation of dangerous operating parts after the blade 6 is thrown out.

[0054] Reference Figure 3-Figure 5 The locking member includes a second spring 171, an insert block 172, a reset block 173 and a pressing diaphragm 174. A first sliding groove 175 is radially opened on the side wall of the moving seat 162, and the insert block 172 slides on the first sliding groove 175. The two ends of the second spring 171 are respectively fixed to the inner wall of the first sliding groove 175 and the inner wall of the insert block 172; the lower plate 12 is located on the recessed area 121 and is provided with a second sliding groove 176. The reset block 173 slides on the second sliding groove 176. The end of the reset block 173 away from the insert block 172 extends out of the lower plate 12 and is fixed to the middle part of the pressing diaphragm 174. The circumferential edge of the pressing diaphragm 174 is fixed to the outer wall of the recessed area 121 of the lower plate 12. When the switching member is in the disengaged state, the first sliding groove 175 faces the second sliding groove 176, and the end of the insert block 172 enters the second sliding groove 176.

[0055] Reference Figure 3-Figure 5When the switching member is in the disengaged state, the plug 172 enters the second slide groove 176 under the action of the second spring 171, thereby locking the switching member in the disengaged state, preventing the cutter disc from resetting and reconnecting with the outer shaft 22 under the action of the first spring 161 after deceleration, thereby ensuring the safety of the lawn mower in dangerous situations. The setting of pressing the diaphragm 174 and the reset block 173 makes it convenient for the user to press the diaphragm 174 to make the reset block 173 push the plug 172 away from the second slide groove 176 after repairing the detached blade 6, thereby releasing the lock and reconnecting the switching member to the connected state, which is simple and convenient to operate.

[0056] Reference Figure 3-Figure 5 To minimize the impact of the insert 172 on the installation of the lower plate 12, a third chamfered surface 124 is formed on the circumferential edge of the lower plate 12 located in the recessed area 121. The end of the insert 172 is tapered. When the lower plate 12 is installed, the insert 172 abuts against the third chamfered surface 124 and automatically moves into the first slide groove 175. To improve locking stability, more locking elements can be provided in different positions according to actual conditions.

[0057] Reference Figure 3-Figure 7 The safety rope 5 includes a rope body, and self-locking hooks 53 are fixed at both ends of the rope body. A first hanging ear 61 is provided on the blade 6. A groove 164 is opened on the side of the switching rod 163 facing the blade 6. A second hanging ear 62 is provided in the groove 164. The two self-locking hooks 53 are hooked on the first hanging ear 61 and the second hanging ear 62 respectively.

[0058] Reference Figure 3-Figure 7 The safety rope 5 is hooked on the blade 6 and the switch rod 163 through the self-locking hooks 53 at both ends, respectively, to achieve a detachable connection between the safety rope 5 and the blade 6 and the switch rod 163. The connection method is simple and reliable, easy to install and disassemble, and is conducive to the replacement and maintenance of the safety rope 5; at the same time, the design of the self-locking hook 53 ensures that the safety rope 5 will not fall off accidentally during normal operation.

[0059] Reference Figure 6 If it is an ordinary blade 6 without the first hanging ear 61, a hole can be opened on the blade 6 and the self-locking hook 53 can be hooked on the corresponding hole.

[0060] Reference Figure 3-Figure 7 The rope body includes an elastic rope 51 in the middle and steel ropes 52 at both ends. Two self-locking hooks 53 are respectively fixed on the steel ropes 52 at both ends. The elastic rope 51 is always located between the upper plate 11 and the lower plate 12, and the elastic rope 51 is always in a stretched state.

[0061] Reference Figure 6A plurality of rotation limiting blocks 19 are evenly arranged along the circumferential direction on the bottom surface of the lower plate 12, and the first hanging ear 61 is arranged on the side of the tail end of the blade 6. When the driving assembly 4 stops running, the blade 6 abuts against the corresponding rotation limiting block 19, and the blade 6 is in a retracted state.

[0062] Reference Figure 3-Figure 7 The rope body consists of an elastic rope 51 in the middle and steel wire ropes 52 at both ends. The elastic rope 51 is always in a stretched state. When the blade 6 is accidentally thrown out, the elastic buffering effect of the elastic rope 51 can reduce the impact force on the safety rope 5 in an instant. As the cutter head continues to rotate, the centrifugal force of the blade 6 will drive the elastic rope 51 to the limit, pulling the switch lever 163 downward to achieve the disengagement of the switch member. The rotation limit block 19 on the bottom surface of the lower plate 12 cooperates with the elastic rope 51. When the drive assembly 4 stops running, the blade 6 abuts against the rotation limit block 19 and is in a retracted state, preventing the blade 6 from rotating freely and improving the safety of the lawn mower when it is idle. The rotation limit block 19 is made of a deformable material such as rubber silicone.

[0063] Reference Figure 2-Figure 5 When the brake disc 71 is unlocked, the brake assembly 7 also includes a brake disc 71, a top cover 72, a third spring 73, a slider 74 and two slide rods 75. The top of the inner shaft 21 has a third sliding groove 76 along the axial direction. The slider is prismatic. The slider 74 slides in the third sliding groove 76, and the two slide rods 75 are respectively fixed to the bottom of the slider 74. The bottom surface of the third sliding groove 76 is provided with two fourth sliding grooves 77 along the axial direction of the inner shaft 21. The two slide rods 75 slide in the fourth sliding groove 77, and the two slide rods 75 are respectively located on both sides of the locking screw 18; the third spring 73 is located in the third sliding groove 76, and the two ends of the third spring 73 are respectively fixed on the bottom surface of the third sliding groove 76 and the bottom surface of the slider 74. The third spring 73 is always in a stretched state, and the bottom end of the slide rod 75 abuts against the corresponding switching rod 163.

[0064] Reference Figure 2-Figure 5 The brake disc 71 is coaxially fixed to the top of the slider 74 by screws. The brake disc 71 is located above the inner shaft 21. The side wall of the brake disc 71 is provided with a first chamfered surface 78 along the circumferential direction. The top of the mounting seat 2 is open and provided with a second chamfered surface 79 that matches the first chamfered surface 78. The first chamfered surface 78 is located directly above the second chamfered surface 79; when the switching member is in the disengaged state, the first chamfered surface 78 abuts against the second chamfered surface 79.

[0065] Reference Figure 2-Figure 5 , wherein the operator can fix the friction plate on the first chamfered surface 78 and the second chamfered surface 79 to reduce damage to the first chamfered surface 78 and the second chamfered surface 79. Since the brake disc 71 is detachable and the second chamfered surface 79 is exposed, the operator can directly inspect the brake assembly 7 without moving other parts of the lawn mower.

[0066] Reference Figure 2-Figure 5 The top cover 72 is fixed to the top of the mounting seat 2 by a plurality of screws, and the brake disc 71 moves inside the top cover 72 .

[0067] Reference Figure 2-Figure 5 , the brake assembly 7 can play a role when the switching member is in the disengaged state; when the switching member is disengaged from the outer shaft 22, the slide bar 75 is no longer supported by the switching rod 163, and under the action of the third spring 73, the slider 74 drives the brake disc 71 to move downward, and the first chamfered surface 78 of the side wall of the brake disc 71 abuts against the second chamfered surface 79 at the top of the mounting seat 2, and the inner shaft 21 stops rotating quickly through friction, realizing the emergency brake function, further improving the safety performance of the lawn mower in dangerous situations.

[0068] Reference Figure 2-Figure 5 The bottom surface of the brake disc 71 is provided with a positioning groove 711 that matches the top of the slider 74. The top of the slider 74 is embedded in the positioning groove 711. This makes the connection between the brake disc 71 and the slider 74 more stable, ensuring that the brake disc 71 will not deviate or shake when moving with the slider 74, thereby ensuring the reliability of the brake assembly 7 and making the braking effect more stable and effective.

[0069] Reference Figure 2 、 Figure 4 and Figure 5 The handle assembly 3 includes an operating handle 31, and the mounting base 2 is fixed to the bottom of the operating handle 31 by screws. The drive assembly 4 includes an engine 41 and an output shaft 42. The engine 41 is installed at the top of the operating handle 31. One end of the output shaft 42 is connected to the engine 41, and the other end of the output shaft 42 extends into the mounting base 2. The output shaft 42 is matched with the outer shaft 22 by helical teeth.

[0070] Reference Figure 3-Figure 5 The outer shaft 22 and the inner shaft 21 are both connected to the mounting base 2 via bearings. The bearings are restricted in position within the mounting base 2 by a stepped surface and a retaining spring within the mounting base 2. A protective hollow column 13 is coaxially fixed to the top surface of the upper plate 11. The protective hollow column 13 surrounds the bottom opening of the mounting base 2 and the switching rod 163, protecting the switching rod 163 and the components within the mounting base 2.

[0071] Reference Figure 2 and Figure 4 A protective cover 23 is fixed to the mounting base 2 by screws. The protective cover 23 is arranged near the side of the operating handle 31 and is mainly used to effectively block the splashing of grass clippings and gravel during mowing to avoid accidental injury to the operator.

[0072] Of course, the above are only typical examples of the present application. In addition, the present application may have many other specific implementation methods. Any technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the present application.

Claims

1. A high-safety garden mower, characterized by: The mowing machine comprises a mowing assembly, a mounting base, a handle assembly and a driving assembly. The mounting base is mounted on the bottom end of the handle assembly. An inner shaft and an outer shaft are rotatably connected in the mounting base. The outer shaft is coaxially sleeved on the inner shaft. The driving assembly is mounted on the handle assembly for driving the outer shaft to rotate. The mowing assembly includes a locking member, a switching member, an upper plate, a lower plate, a plurality of safety ropes and a plurality of blades, wherein the blades are connected between the upper plate and the lower plate by rivets, and the upper plate and the lower plate are coaxially fixedly connected to the inner shaft by a locking screw. The switching member is movably arranged on the upper plate, and the plurality of safety ropes respectively correspond to the plurality of blades. The two ends of the safety ropes are detachably connected to the switching member and the corresponding blades. When the blades are in a normal state, the switching member is connected to the outer shaft to drive the upper plate and the outer shaft to rotate synchronously. When the blade is separated from the cutter head and the safety rope is driven out, the switching member is separated from the outer shaft, and the locking member is used to lock the disengaged state of the switching member; The switching member includes a first spring, a moving seat and a plurality of switching rods, the plurality of switching rods corresponding to the plurality of blades respectively, and the plurality of switching rods are evenly arranged on the top surface of the moving seat along the circumferential direction. The upper plate is provided with a plurality of through slots, and the switching rods slide in the corresponding through slots along a direction parallel to the rotation axis of the outer shaft. The moving seat is arranged in an annular shape, and the moving seat and the plurality of switching rods surround the locking screw. The first spring is located below the moving seat, and the first spring drives the moving seat to always move upward.

2. A high-safety garden mower according to claim 1, characterized in that: The end of the safety rope away from the blade is fixedly mounted on the corresponding switching rod, and its height is higher than the end connected to the blade; a conical tooth groove is provided at the bottom end of the outer shaft, and the top end of the switching rod extends above the upper plate and has a conical tooth surface matching the conical tooth groove.

3. A high-safety garden mower according to claim 2, characterized in that: The middle part of the lower plate is recessed downward to form a recessed area, and the bottom surface of the lower plate is located at the center of the recessed area and protrudes upward to form a receiving area, and the receiving area is used to receive the head of the locking screw; the movable seat slides in the receiving area, and the first spring is located in the receiving area, and the two ends of the first spring respectively abut against the movable seat and the bottom surface of the recessed area.

4. A high-safety garden mower according to claim 3, characterized in that: When the switching member is in the disengaged state, the movable seat abuts against the raised surface of the accommodating area.

5. The high-safety garden mower according to claim 2, characterized in that: The locking member includes a second spring, an insert block, a reset block and a push diaphragm, and a first sliding groove is radially opened on the side wall of the movable seat, the insert block slides on the first sliding groove, and the two ends of the second spring are respectively fixed on the inner wall of the first sliding groove and the inner wall of the insert block; the lower plate is located on the recessed area and is provided with a second sliding groove, and the reset block slides on the second sliding groove, and the end of the reset block away from the insert block extends out of the lower plate and is fixed to the middle of the push diaphragm, and the circumferential edge of the push diaphragm is fixed on the outer wall of the recessed area of ​​the lower plate. When the switching member is in a disengaged state, the first sliding groove faces the second sliding groove, and the end of the insert block enters the second sliding groove.

6. The high-safety garden mower according to claim 2, characterized in that: The safety rope includes a rope body, and self-locking hooks are fixed at both ends of the rope body. A first hanging ear is provided on the blade. A groove is opened on the side of the switching rod facing the blade, and a second hanging ear is provided in the groove. Two self-locking hooks are hooked on the first hanging ear and the second hanging ear respectively.

7. The high-safety garden mower according to claim 6, characterized in that: The rope body includes an elastic rope in the middle and steel wire ropes at both ends. Two self-locking hooks are respectively fixed to the steel wire ropes at both ends. The elastic rope is always located between the upper plate and the lower plate, and the elastic rope is always in a stretched state. A plurality of rotation limiting blocks are evenly arranged along the circumferential direction on the bottom surface of the lower plate, and the first hanging ear is arranged on the side surface of the tail end of the blade. When the driving assembly stops running, the blade abuts against the corresponding rotation limiting block and the blade is in a retracted state.

8. The high-safety garden mower according to claim 2, characterized in that: The brake assembly also includes a brake disc, a top cover, a third spring, a slider and two slide rods, the top of the inner shaft is provided with a third slide groove along the axial direction, the slider slides in the third slide groove, and the two slide rods are respectively fixed to the bottom end of the slider, and two fourth slide grooves are provided on the bottom surface of the third slide groove along the axial direction of the inner shaft, the two slide rods slide in the fourth slide groove, and the two slide rods are respectively located on both sides of the locking screw; the third spring is located in the third slide groove, and the two ends of the third spring are respectively fixed on the bottom surface of the third slide groove and the bottom surface of the slider, the third spring is always in a stretched state, and the bottom end of the slide rod abuts against the corresponding switching rod; The brake disc is coaxially fixed to the top of the slider by screws. The brake disc is located above the inner shaft. The side wall of the brake disc is provided with a first chamfered surface along the circumferential direction. The top of the mounting seat is open and provided with a second chamfered surface matching the first chamfered surface. The first chamfered surface is located directly above the second chamfered surface. When the switching member is in a disengaged state, the first chamfered surface abuts against the second chamfered surface. The top cover is fixed to the top of the mounting seat by a plurality of screws, and the brake disc moves inside the top cover.

9. The high-safety garden mower according to claim 8, characterized in that: A positioning groove matching the top of the slider is provided on the bottom surface of the brake disc, and the top of the slider is embedded in the positioning groove.

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