Hand-propelled small-sized lawn mower

Abstract

The lawn maintenance hand-push small mower comprises a frame, walking wheels, a grass pushing mechanism and an auxiliary power mechanism. The frame has a cutting space. A spiral roller cutter is rotatably connected in the cutting space and a fixed bottom cutter is connected. The walking wheels are two, each walking wheel can rotate and drive the spiral roller cutter to rotate after the frame moves forward. The grass pushing mechanism is power-connected with the two walking wheels and can push the grass leaves accumulated on the fixed bottom cutter backward. The auxiliary power mechanism is connected with the frame and the grass pushing mechanism, can support the frame with the walking wheels and provide kinetic energy for the grass pushing mechanism. The lawn maintenance hand-push small mower can push the cut grass leaves to the rear, effectively avoid the accumulation of the grass leaves on the fixed bottom cutter, and provide part of the kinetic energy for the grass pushing mechanism through the auxiliary power mechanism, avoid the stop of the walking wheels, ensure the stability of the mowing and have high practicability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of small manual lawn mower, and particularly relates to a hand-push small lawn mower for lawn maintenance. BACKGROUND

[0002] The lawn mower is a mechanical equipment for trimming lawns, vegetation or weeds, and its core function is to achieve cutting through rotating or reciprocating cutters. For small-scale trimming, a manual lawn mower is usually used, which works on the principle of being pushed by manpower, with walking wheels being driven through gear sets or chain wheels to drive the spiral roller cutter and the fixed bottom cutter to cut the grass leaves.

[0003] In the prior art, during the mowing process, the cut grass leaves need to be thrown by the spiral roller cutter into the grass collecting frame behind the fixed bottom cutter. However, during the rotating cutting process of the spiral roller cutter, most of the grass leaves will usually accumulate on the fixed bottom cutter and cannot enter the grass collecting frame, and at the same time, the grass collecting frame is provided with an open top, so a small amount of grass leaves will be thrown out to the outside. For the grass leaves accumulated on the fixed bottom cutter, the staff needs to manually move the grass leaves accumulated on the fixed bottom cutter to the grass collecting frame at regular intervals, which is time-consuming and laborious. In addition, during the mowing process, the power of the spiral roller cutter comes from the walking wheels, and when encountering a wet and slippery environment such as after rain or in the morning, the grass leaves are attached with water, at this time, the walking wheels cannot rotate due to the reduced friction and the excessive torque borne by the inside, and thus the stable mowing work cannot be guaranteed. SUMMARY

[0004] The present application provides a hand-push small lawn mower for lawn maintenance, which aims to solve the problem of poor practicability of the existing hand-push lawn mower due to the fact that the grass leaves cannot be directly transferred to the grass collecting frame and the walking wheels cannot rotate in a wet and slippery environment.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is to provide a hand-push small lawn mower for lawn maintenance, which comprises:

[0006] The frame has a cutting space which is horizontally through and open at the bottom; the spiral roller cutter is rotationally connected in the cutting space, and the fixed bottom cutter is connected in cooperation with the spiral roller cutter;

[0007] The walking wheels are provided in two, each of the walking wheels is rotationally arranged at the two ends of the frame along the width direction of the frame, and is used to rotate and drive the spiral roller cutter after walking in front of the frame;

[0008] The grass moving mechanism is located above the fixed bottom cutter and is power-connected with the two walking wheels, and is used to move the grass leaves accumulated on the fixed bottom cutter backward;

[0009] An auxiliary power mechanism is connected with the vehicle frame and the grass stirring mechanism, and is used to assist the walking wheels in supporting the vehicle frame and assisting the walking wheels in providing power for the grass stirring mechanism.

[0010] In a possible implementation, each walking wheel has a ring-shaped cavity, and an internal gear ring is fixedly arranged in each ring-shaped cavity;

[0011] The two ends of the spiral roller are respectively inserted into the two ring-shaped cavities, and the two ends of the spiral roller are respectively connected with first driven gears used for engaging with the internal gear rings.

[0012] In a possible implementation, the grass stirring mechanism comprises:

[0013] A transmission shaft is arranged in parallel with the axes of the walking wheels and is rotationally connected with the vehicle frame, and the two ends of the transmission shaft are respectively inserted into the two ring-shaped cavities;

[0014] A plurality of stirring members are arranged in a ring shape and are spaced apart from each other around the transmission shaft, each stirring member comprises a plurality of connecting rods which are spaced apart from each other along the axis of the transmission shaft; one end of each connecting rod is fixedly connected with the transmission shaft, and the other end of each connecting rod extends outward and is connected with a rubber sheet;

[0015] Two second driven gears are arranged at the two ends of the transmission shaft respectively, and engage with the internal gear rings respectively.

[0016] In a possible implementation, the auxiliary power mechanism comprises:

[0017] Two turnover arms are arranged at the two sides of the cutting space along the axis of the transmission shaft respectively, one end of each turnover arm is rotationally connected with the transmission shaft, and the other end of each turnover arm extends outward;

[0018] An auxiliary shaft is arranged in parallel with the axis of the transmission shaft and is rotationally connected with the other ends of the two turnover arms;

[0019] A support roller is rotationally arranged on the auxiliary shaft and is located between the two turnover arms;

[0020] Two support arms are arranged outside the two turnover arms respectively and are connected with the vehicle frame, and each support arm is used for rotationally connecting the two ends of the auxiliary shaft;

[0021] An energy storage and release assembly is arranged on the two support arms, is power-connected with the transmission shaft through the auxiliary shaft, is used for storing energy, and provides power for the grass stirring mechanism during mowing.

[0022] In a possible implementation, a rolling bearing is arranged between each of the turnover arms and the transmission shaft; a rolling bearing is arranged between each of the turnover arms and the auxiliary shaft; a plurality of rolling bearings are arranged between the auxiliary shaft and the support roller; and a rolling bearing is arranged between each of the support arms and the auxiliary shaft.

[0023] In a possible implementation, the auxiliary shaft has a lumen extending along the axial direction; the transmission shaft is arranged to rotate in a forward direction when the vehicle frame moves forward; and the energy storage and release assembly comprises:

[0024] A chain transmission structure is arranged at one end of the auxiliary shaft and at the other end of the transmission shaft;

[0025] A first one-way bearing is arranged at one end of the auxiliary shaft and at the other end of the auxiliary shaft; the inner ring of the first one-way bearing is fixedly arranged with a fixed column;

[0026] A brake structure is arranged at the other end of the auxiliary shaft and is connected to the other end of the auxiliary shaft, and is used to lock the auxiliary shaft;

[0027] An elastic belt is arranged in the lumen, one end of the elastic belt is connected to the fixed rod in the lumen, and the other end of the elastic belt is connected to the fixed column; the elastic belt is used to store energy by reverse rotation of the fixed column, and release potential energy and drive the auxiliary shaft, the chain transmission structure and the transmission shaft to rotate in a forward direction after the vehicle frame moves forward and the brake structure releases the locking of the auxiliary shaft.

[0028] In a possible implementation, the chain transmission structure is provided with two;

[0029] Each of the turnover arms is provided with a cavity, and each of the chain transmission structures is arranged in the cavity.

[0030] In a possible implementation, a second one-way bearing is arranged between each of the chain transmission structures and the transmission shaft.

[0031] In a possible implementation, the fixed column has a prismatic block at the outer end for docking with a crank handle.

[0032] In a possible implementation, the hand-push type small lawn mower for lawn maintenance further comprises a grass collecting frame, the grass collecting frame is detachably connected to the vehicle frame, and the grass collecting frame is located behind the fixed bottom knife and is connected to the fixed bottom knife.

[0033] Compared with the prior art, the scheme shown in the present embodiment has the beneficial effects that the two walking wheels arranged on the frame can rotate through the friction with the ground or grass leaves during the forward movement of the frame, the walking wheels as the power source can drive the spiral roller cutter to rotate, and then the spiral roller cutter and the fixed bottom cutter are matched to realize the shearing of the grass leaves. The grass moving mechanism arranged above the fixed bottom cutter can also rotate under the driving of the walking wheels, and then the cut grass leaves are moved to the rear, which can effectively avoid the accumulation of the grass leaves on the fixed bottom cutter, and also avoid the manual processing of the accumulated grass leaves, saving time and effort. In addition, the auxiliary power mechanism is arranged, which can form three-point support of the frame with each walking wheel, ensuring the stability of the frame walking and the fixed height of the mowing. The auxiliary power mechanism can also provide part of the power for the grass moving mechanism, so that the friction force received by the walking wheel can resist the reverse torque from the grass moving mechanism, and then the walking wheel can rotate when receiving a smaller friction force, thereby ensuring the stability and effect of the mowing, and having strong practicability. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 Structure diagram of the hand-push type small mower for lawn maintenance provided by the embodiment of the present application Figure 1 ;

[0035] Figure 2 Structure diagram of the hand-push type small mower for lawn maintenance provided by the embodiment of the present application Figure 2 (Hidden part of the handrail);

[0036] Figure 3 Structure diagram of the hand-push type small mower for lawn maintenance provided by the embodiment of the present application Figure 3 (Hidden part of the handrail);

[0037] Figure 4 Auxiliary power mechanism of the hand-push type small mower for lawn maintenance provided by the embodiment of the present application

[0038] Figure 5 For Figure 4 Embodiment of the hand-push type small mower for lawn maintenance provided by the embodiment of the present application

[0039] BRIEF DESCRIPTION OF DRAWINGS

[0040] 10, frame; 11, handrail; 12, cutting space; 13, spiral roller cutter; 14, fixed bottom cutter; 15, first driven gear; 16, grass collecting frame;

[0041] 20, walking wheel; 21, annular cavity; 22, inner gear ring;

[0042] 30, grass pushing mechanism; 31, transmission shaft; 32, connecting rod; 33, second driven gear; 34, rubber sheet;

[0043] 40, auxiliary power mechanism; 41, overturning arm; 42, auxiliary shaft; 43, supporting roller; 44, supporting arm; 45, energy storage and release assembly; 451, chain transmission structure; 452, first one-way bearing; 453, brake structure; 4531, brake handle; 4532, fixed shell; 4533, rotating shaft; 4534, rotating disc; 4535, brake block; 4536, spring; 454, elastic belt; 455, fixed column; 456, fixed rod; 457, second one-way bearing. DETAILED DESCRIPTION

[0044] In order to make the technical problems to be solved by the present application, technical solutions and beneficial effects clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0045] Please refer to Figure 1 and Figure 2 , now the lawn maintenance hand-push small mower provided by the present application will be described. The lawn maintenance hand-push small mower comprises a frame 10, walking wheels 20, a grass pushing mechanism 30 and an auxiliary power mechanism 40. The frame 10 has a cutting space 12 which is horizontally through and has an open bottom. A spiral roller cutter 13 is rotationally connected in the cutting space 12, and a fixed bottom cutter 14 which cooperates with the spiral roller cutter 13 is connected. The walking wheels 20 are provided in two, each of the walking wheels 20 is rotationally arranged at the two ends of the frame 10 along the width direction of the frame 10, and can rotate to drive the spiral roller cutter 13 to rotate after the frame 10 advances. The grass pushing mechanism 30 is located above the fixed bottom cutter 14 and is power-connected with the two walking wheels 20, and can push the grass leaves accumulated on the fixed bottom cutter 14 backward. The auxiliary power mechanism 40 is connected with the frame 10 and the grass pushing mechanism 30, and can assist the walking wheels 20 to support the frame 10, and the auxiliary power mechanism 40 provides kinetic energy for the grass pushing mechanism 30.

[0046] The frame 10 has a cutting space 12 which is horizontally through and has an open bottom below, and the through direction of the cutting space 12 is the advancing direction of the frame 10, so that the grass leaves will pass through the cutting space 12, preferentially contact the spiral roller cutter 13, and fall on the fixed bottom cutter 14 after the spiral roller cutter 13 and the fixed bottom cutter 14 complete cutting on the grass leaves. The width direction of the frame 10 is the horizontal direction perpendicular to the through direction of the cutting space 12.

[0047] The lawnmower provided in this embodiment is a push-type small lawnmower. Compared with the prior art, the two wheels 20 on the frame 10 can rotate during the forward movement of the frame 10 through friction with the ground or grass blades. The wheels 20, as a power source, drive the spiral roller blade 13 to rotate, thereby cutting the grass blades through the cooperation of the spiral roller blade 13 and the fixed bottom blade 14. The grass-removing mechanism 30, located above the fixed bottom blade 14, can also rotate under the drive of the wheels 20, thereby moving the cut grass blades to the rear, effectively preventing the grass blades from accumulating on the fixed bottom blade 14, and also avoiding the need for manual handling of accumulated grass blades due to frequent stops and starts, saving time and effort. In addition, an auxiliary power mechanism 40 is provided, which, together with each wheel 20, forms a three-point support for the frame 10, ensuring the stability of the frame 10 during movement and also ensuring a fixed cutting height. The auxiliary power mechanism 40 can also provide some power to the grass-cutting mechanism 30 to ensure that the friction force on the walking wheel 20 can resist the reverse torque from the grass-cutting mechanism 30, thereby ensuring that the walking wheel 20 can rotate when subjected to a small friction force, thus ensuring the stability and effect of grass cutting, and making it highly practical.

[0048] It should be noted that the frame 10 serves as the foundation of the overall structure, and the frame 10 is also connected to a handrail 11. The handrail 11 facilitates the staff to push the frame 10 forward. This technology is existing technology and will not be described in detail here.

[0049] In some embodiments, the aforementioned traveling wheel 20 and spiral roller cutter 13 can be adopted as follows: Figure 2 The structure shown. See also Figure 2 Each traveling wheel 20 has an annular cavity 21, which can be arranged around the axle of the traveling wheel 20. One side of each annular cavity 21 is open, and the openings of the annular cavities 21 in two traveling wheels 20 face each other. The opening of the annular cavity 21 of each traveling wheel 20 is sealed by the frame 10. See [reference needed]. Figure 2 and Figure 3 An internal gear ring 22 is fixed in each annular cavity 21. The axis of the internal gear ring 22 is coaxial with the axis of the traveling wheel 20. The internal gear ring 22 has an annular internal tooth surface.

[0050] Specifically, the two ends of the spiral roller cutter 13 extend into the two annular cavities 21 respectively, and the two ends of the spiral roller cutter 13 are respectively connected to a first driven gear 15 that can mesh with each internal gear ring 22.

[0051] The spiral roller cutter 13 is powered by two first driven gears 15 connected to the internal gear rings 22 in the two traveling wheels 20. The gear meshing ensures efficient power transmission, while also providing a large load-bearing capacity, compact design, and high reliability. The annular cavity 21 seals the internal gear rings 22 and the first driven gears 15, preventing grass blades from entering and thus ensuring the stability of their transmission.

[0052] The structure of the spiral roller cutter 13 and the power connection between the spiral roller cutter 13 and the traveling wheel 20 is existing technology and will not be described in detail here.

[0053] In some embodiments, the aforementioned weed-removing mechanism 30 may employ, for example... Figure 2 The structure shown. See also Figure 2 The grass-removing mechanism 30 includes a drive shaft 31, grass-removing components, and second driven gears 33. The axis of the drive shaft 31 is parallel to the axis of each traveling wheel 20 and is rotatably connected to the frame 10. Both ends of the drive shaft 31 extend into two annular cavities 21. Multiple grass-removing components are provided, arranged annularly around the drive shaft 31. Each grass-removing component includes multiple connecting rods 32 spaced apart along the axis of the drive shaft 31. One end of each connecting rod 32 is fixedly connected to the drive shaft 31, and the other end extends outward and is connected to a rubber sheet 34. Two second driven gears 33 are provided, each located at one end of the drive shaft 31 and meshing with two internal gear rings 22.

[0054] The drive shaft 31 is parallel to the axis of the traveling wheel 20. The drive shaft 31 must be located behind the spiral roller cutter 13. The drive shaft 31 is powered by the internal gear ring 22 through the second driven gear 33. This gear connection method ensures efficient power transmission, while also guaranteeing a large load-bearing capacity, compact design, and high reliability. In addition, the second driven gear 33 is located inside the annular cavity 21, which also avoids the influence of cut grass blades and ensures the stability of power transmission. Multiple material feeding components can rotate with the drive shaft 31. Each connecting rod 32 in each material feeding component can ensure that the entire fixed bottom cutter 14 is covered. The rubber sheet 34 ensures flexible contact with the fixed bottom cutter 14, avoiding damage to the fixed bottom cutter 14, while also ensuring the cleaning effect of grass blades on the fixed bottom cutter 14.

[0055] As the walking wheel 20 moves forward, it will rotate in the forward direction. At this time, the inner gear ring 22 will drive the second driven gear 33 to rotate in the forward direction, thereby realizing the forward rotation of the transmission shaft 31. Through the connecting rod 32 on the transmission shaft 31, the rubber pieces 34 will push the grass blades accumulated on the fixed bottom blade 14 backward, thereby preventing the grass blades from accumulating on the fixed bottom blade 14.

[0056] In some embodiments, the auxiliary power mechanism 40 may employ, for example...Figure 2 and Figure 3 The structure is shown in FIG. 1. Referring to FIG. 1, Figure 2 and Figure 3 The auxiliary power mechanism 40 includes two turnover arms 41, an auxiliary shaft 42, a supporting roller 43, two supporting arms 44, and an energy storage and release assembly 45. The two turnover arms 41 are arranged on the two sides of the cutting space 12 along the axial direction of the transmission shaft 31, and one end of each of the two turnover arms 41 is rotationally connected to the transmission shaft 31. The auxiliary shaft 42 is arranged in parallel with the transmission shaft 31, and the other ends of the two turnover arms 41 are rotationally connected to the auxiliary shaft 42. The supporting roller 43 is rotationally arranged on the auxiliary shaft 42 and located between the two turnover arms 41. The two supporting arms 44 are arranged on the outer sides of the two turnover arms 41 and connected to the vehicle frame 10, and the two ends of the auxiliary shaft 42 are rotationally connected to the two supporting arms 44. The energy storage and release assembly 45 is arranged on the two supporting arms 44 and connected to the transmission shaft 31 through the auxiliary shaft 42, can store energy, and provides kinetic energy for the grass stirring mechanism 30 during mowing.

[0057] The two turnover arms 41 can ensure that the distance between the auxiliary shaft 42 and the transmission shaft 31 is fixed, and the two supporting arms 44 cooperate with the two turnover arms 41 to fix the position of the auxiliary shaft 42. The supporting arms 44 and the turnover arms 41 can form a triangular frame with the vehicle frame 10, thereby ensuring the stability of the auxiliary shaft 42 and the supporting roller 43, and facilitating the stable support of the supporting roller 43 and the walking wheels 20 on the vehicle frame 10.

[0058] The supporting roller 43 is rotationally connected to the auxiliary shaft 42, which can avoid the supporting roller 43 from being subjected to a large reverse torque, thereby ensuring the stable rotation of the supporting roller 43. The supporting roller 43 needs to have a certain width to increase the friction with the ground or grass leaves, thereby ensuring the stable rotation thereof. In addition, the supporting roller 43 can be a hollow body to reduce the overall weight and avoid crushing the lawn grass.

[0059] The energy storage and release assembly 45 can act on the auxiliary shaft 42, release power to the transmission shaft 31 through the auxiliary shaft 42, drive the transmission shaft 31 to rotate during mowing, thereby reducing the reverse torque received by the walking wheels 20, ensuring the stable rotation of the walking wheels 20 under the condition of receiving a small friction force, and ensuring the mowing effect.

[0060] In this embodiment, as an embodiment of the supporting arms 44, each supporting arm 44 is detachably connected to the vehicle frame 10, for example, by bolt connection or limit post insertion. The pitch of the turnover arms 41 can be adjusted by adjusting the position of the connection point of the supporting arms 44 on the vehicle frame 10, thereby realizing the fine adjustment of the height of the cutting edge of the fixed bottom knife 14 and ensuring the adjustment of the cutting height of the grass leaves.

[0061] In some embodiments, the auxiliary power mechanism 40 can adopt the structure as shown in Figure 2 to 3 . Referring to Figure 2 to 3 , a rolling bearing is arranged between each flip arm 41 and the transmission shaft 31 to ensure that the transmission shaft 31 can rotate freely relative to the flip arm 41. A rolling bearing is arranged between each flip arm 41 and the auxiliary shaft 42 to ensure that the auxiliary shaft 42 can rotate freely relative to the flip arm 41.

[0062] A plurality of rolling bearings are arranged between the auxiliary shaft 42 and the support roller 43 to ensure that the auxiliary shaft 42 can rotate freely relative to the support roller 43. A rolling bearing is arranged between each support arm 44 and the auxiliary shaft 42 to ensure that the support arm 44 can rotate freely relative to the auxiliary shaft 42.

[0063] In some embodiments, the energy storage and release assembly 45 can adopt the structure as shown in Figure 2 to 4 . Referring to Figure 2 to 4 , the auxiliary shaft 42 has a lumen extending along the axial direction, and the auxiliary shaft 42 can be a hollow metal pipe. It is set that the transmission shaft 31 rotates in the forward direction when the vehicle frame 10 moves forward.

[0064] The energy storage and release assembly 45 includes a chain transmission structure 451, a first one-way bearing 452, a brake structure 453, and an elastic belt 454. One end of the chain transmission structure 451 is connected to the auxiliary shaft 42, and the other end is connected to the transmission shaft 31. The outer ring of the first one-way bearing 452 is fixed to one of the support arms 44, and the inner ring corresponds to one end of the auxiliary shaft 42. The inner ring of the first one-way bearing 452 is fixed with a fixed column 455. The brake structure 453 is fixed to the other support arm 44 and connected to the other end of the auxiliary shaft 42, and can lock the auxiliary shaft 42. The elastic belt 454 is arranged in the lumen, one end of which is connected to a fixed rod 456 in the lumen, and the other end is connected to the fixed column 455. The elastic belt 454 can store energy by reverse rotation through the fixed column 455, and release potential energy to drive the auxiliary shaft 42, the chain transmission structure 451, and the transmission shaft 31 to rotate in the forward direction after the vehicle frame 10 moves forward and the brake structure 453 releases the locking of the auxiliary shaft 42.

[0065] As to the usage and working principle of the energy storage and release assembly 45, the outer ring of the first one-way bearing 452 is fixedly connected with one of the support arms 44, which can be welded or bonded. The inner ring cannot rotate forward and can only rotate reversely under the fixation of the outer ring. The brake structure 453 can lock the auxiliary shaft 42 at the other end of the auxiliary shaft 42 to avoid the rotation of the auxiliary shaft 42. At this time, the fixed column 455 can be reversely rotated by an externally provided crank or the like, and one end of the elastic belt 454 is reversely rotated by the fixed column 455, and the other end of the elastic belt 454 is fixedly arranged. Therefore, the kinetic energy of the crank is converted into the elastic potential energy of the elastic belt 454, and the auxiliary shaft 42 cannot rotate under the locking of the brake structure 453.

[0066] When mowing, the frame 10 advances under the pushing of the worker. When the walking wheel 20 does not rotate, the brake structure 453 can be manually controlled to unlock the auxiliary shaft 42. At this time, the elastic potential energy of the elastic belt 454 is converted into the kinetic energy of the auxiliary shaft 42, so that the auxiliary shaft 42 rotates forward. Further, the auxiliary shaft 42 drives the transmission shaft 31 to rotate forward through the chain transmission structure 451, so as to reduce the reverse torque of the walking wheel 20 from the transmission shaft 31, or directly drives the walking wheel 20 to advance through the transmission shaft 31, so as to ensure the mowing effect.

[0067] The energy storage and release assembly 45 does not need external power driving. Only before encountering a slippery environment, energy storage is needed by human power, and the stored energy can be released by the brake structure 453 after the walking wheel 20 stops working. Therefore, the situation that the friction of the walking wheel 20 is small can be adapted, the reverse torque of the walking wheel 20 is reduced, the cutting effect and cutting stability can be ensured, the structure is simple, the operation is convenient, and the practicality is high.

[0068] As the brake assembly in the embodiment, refer to Figure 1 , 4 and Figure 5 . The brake assembly can include a brake handle 4531 arranged on the handrail 11, a fixed shell 4532 fixedly arranged on the other support arm 44, a rotating shaft 4533 arranged in the fixed shell 4532 and fixedly connected with the other end of the auxiliary shaft 42, a rotating disc 4534 coaxially arranged on the rotating shaft 4533, a brake block 4535 arranged in the fixed shell 4532 and slidingly limited along the radial direction of the rotating disc 4534, and a spring 4536 arranged in the fixed shell 4532 and capable of pushing the brake block 4535 to keep in contact with the outer edge surface of the rotating disc 4534. The metal wire connecting the brake block 4535 and the brake handle 4531 is fixedly connected. The brake block 4535 has a friction surface matched with the outer edge surface of the rotating disc 4534.

[0069] In the energy storage stage, the spring 4536 pushes the brake block 4535 to abut against the outer edge surface of the rotating disc 4534, at this time the rotating disc 4534 cannot rotate, and the auxiliary shaft 42 also cannot rotate. When the worker holds the brake handle 4531, the metal wire in the brake handle 4531 will pull the brake block 4535 to move reversely, and then the brake block 4535 is separated from the locking of the rotating disc 4534, at this time the elastic belt 454 drives the auxiliary shaft 42 to rotate forward.

[0070] In some embodiments, the chain transmission structure 451 can adopt the structure as shown in Figure 3 and Figure 4 . Referring to Figure 3 and Figure 4 , the chain transmission structure 451 is provided with two, and the setting of the two chain transmission structures 451 can ensure the stability of power transmission.

[0071] Specifically, each turnover arm 41 is provided with a cavity, and each chain transmission structure 451 is located in the cavity, that is, each turnover arm 41 is a shell structure, which can ensure that the chain transmission structure 451 is covered, so as to avoid the cut grass falling into the chain transmission structure 451, and ensure the stable work of the chain transmission structure 451.

[0072] In the embodiment, the chain transmission structure 451 can include two sprockets and a transmission chain, one of the sprockets corresponds to the transmission shaft 31, and the other sprocket corresponds to the auxiliary shaft 42.

[0073] In some embodiments, the chain transmission structure 451 can adopt the structure as shown in Figure 4 . Referring to Figure 4 , the second one-way bearing 457 is arranged between each chain transmission structure 451 and the transmission shaft 31, which relates to that when the auxiliary shaft 42 is at rest, the forward rotation of the transmission shaft 31 will drive the auxiliary shaft 42 to rotate forward, which results in that the energy of the elastic belt 454 can be released only once, and cannot be flexibly controlled. The setting of the second one-way bearing 457, the inner ring of which is coaxially connected with the transmission shaft 31, and the outer ring of which is coaxially connected with the corresponding sprocket, the inner ring can rotate freely, and the outer ring can drive the inner ring to rotate forward. This structure can ensure that the power cannot be transmitted to the auxiliary shaft 42 during the forward rotation of the transmission shaft 31, and the auxiliary shaft 42 can be continuously kept at rest. This structure can ensure the flexible control of the brake structure 453, and only needs to release the locking of the brake structure 453 to the auxiliary shaft 42 when the walking wheel 20 does not rotate or cannot rotate, which is simple in structure, low in cost, and can effectively ensure the flexible release of the energy storage and release assembly 45.

[0074] In some embodiments, the fixed column 455 can adopt the structure as shown in Figure 4 . Referring toFigure 4 The outer end of the fixed column 455 has a prismatic block for the butt joint of the crank handle, and the prismatic block is arranged to ensure the insertion limitation with the crank handle, thereby ensuring that the crank handle can drive the fixed column 455 to rotate reversely.

[0075] In some embodiments, referring to Figure 1 The hand-push type small lawn mower for lawn maintenance further comprises a grass collecting frame 16, which is detachably connected with the vehicle frame 10 and located at the rear of the fixed bottom cutter 14 and connected with the fixed bottom cutter 14. The arrangement of the grass collecting frame 16 can ensure the collection of small grass leaves. The detachable connection between the grass collecting frame 16 and the vehicle frame 10 is the prior art and will not be described here.

[0076] The above merely describes the preferred embodiments of the present application and is not used to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A small, push-type lawnmower for lawn maintenance, characterized in that: include: The frame has a horizontally continuous cut-out space with an open bottom; A spiral roller cutter is rotatably connected in the cutting space, and a fixed bottom cutter that cooperates with the spiral roller cutter is also connected. The vehicle has two traveling wheels, each of which is rotatably mounted at both ends of the frame along the width direction of the frame. The traveling wheels rotate after the frame moves forward and drive the spiral roller to rotate. Each traveling wheel has an annular cavity, and an internal gear ring is fixed in each annular cavity. A grass-removing mechanism, located above the fixed bottom blade and powered by the two traveling wheels, is used to push the grass accumulated on the fixed bottom blade backward. The grass-removing mechanism includes a drive shaft and a second driven gear. The axis of the drive shaft is parallel to the axis of each traveling wheel and is rotatably connected to the frame. Both ends of the drive shaft extend into the two annular cavities. There are two second driven gears, which are respectively located at both ends of the drive shaft and mesh with the two internal gear rings. An auxiliary power mechanism, connected to the vehicle frame and the weeding mechanism, assists the walking wheels in supporting the vehicle frame and in providing kinetic energy to the weeding mechanism. The auxiliary power mechanism includes a tilting arm, an auxiliary shaft, a support roller, a support arm, and an energy storage and release assembly. Two tilting arms are provided, each positioned on either side of the cutting space along the axis of the drive shaft. One end of each tilting arm is rotatably connected to the drive shaft, and the other end of each tilting arm extends outward. The axis of the auxiliary shaft is parallel to the axis of the drive shaft and rotatably connected to the other ends of the two tilting arms. The support roller is rotatably sleeved on the auxiliary shaft and located between the two tilting arms. Two support arms are provided, each located outside the two tilting arms and connected to the vehicle frame. Each support arm allows for rotatable connection between the two ends of the auxiliary shaft. The energy storage and release assembly is located on the two support arms and is poweredly connected to the drive shaft via the auxiliary shaft. It stores energy and provides kinetic energy to the weeding mechanism during the mowing process. The auxiliary shaft has a cavity extending along its axial direction; the drive shaft is designed to rotate in the forward direction when the frame moves forward; the energy storage and release assembly includes a chain drive structure, a first one-way bearing, a brake structure, and an elastic band; one end of the chain drive structure is connected to the auxiliary shaft, and the other end is connected to the drive shaft; the outer ring of the first one-way bearing is fixed on one of the support arms, and the inner ring corresponds to one end of the auxiliary shaft, with a fixed post fixed to the inner ring of the first one-way bearing; the brake structure is fixed on the other support arm and connected to the other end of the auxiliary shaft for locking the auxiliary shaft; the elastic band is disposed in the cavity, one end of which is connected to a fixed rod inside the cavity, and the other end is connected to the fixed post; the elastic band stores energy through the reverse rotation of the fixed post, and releases potential energy and drives the auxiliary shaft, the chain drive structure, and the drive shaft to rotate in the forward direction when the frame moves forward and the brake structure releases the lock on the auxiliary shaft.

2. The hand-push mini lawnmower for lawn maintenance as described in claim 1, characterized in that, The spiral roller cutter extends into the two annular cavities at both ends, and each end of the spiral roller cutter is connected to a first driven gear for meshing with each of the internal gear rings.

3. The hand-push mini lawnmower for lawn maintenance as described in claim 2, characterized in that, The weed-removing mechanism also includes: The material feeding component is provided in multiple ways, and each material feeding component is arranged in a ring at intervals around the drive shaft. Each material feeding component includes multiple connecting rods arranged at intervals along the axis of the drive shaft. One end of each connecting rod is fixedly connected to the drive shaft, and the other end extends outward and is connected to a rubber sheet.

4. The hand-push mini lawnmower for lawn maintenance as described in claim 1, characterized in that, Each of the aforementioned tilting arms is provided with a rolling bearing between itself and the drive shaft; each of the aforementioned tilting arms is provided with a rolling bearing between itself and the auxiliary shaft; multiple rolling bearings are provided between the auxiliary shaft and the support roller; and each of the aforementioned support arms is provided with a rolling bearing between itself and the auxiliary shaft.

5. The hand-push mini lawnmower for lawn maintenance as described in claim 1, characterized in that, The chain drive structure has two components; Each of the aforementioned rotating arms has a cavity, and each of the aforementioned chain drive structures is located in the respective cavity.

6. The hand-push mini lawnmower for lawn maintenance as described in claim 5, characterized in that, Each of the chain drive structures is provided with a second one-way bearing between itself and the drive shaft.

7. The hand-push mini lawnmower for lawn maintenance as described in claim 1, characterized in that, The outer end of the fixed column has a prism block for connecting the crank handle.

8. The hand-push mini lawnmower for lawn maintenance as described in claim 1, characterized in that, The lawn maintenance hand-push small lawnmower also includes a grass collection frame, which is detachably connected to the frame and is located behind and connected to the fixed bottom blade.

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