Hand-push type small mower for lawn maintenance

Abstract

The invention provides a hand-push type small mower for lawn maintenance. The hand-push type small mower comprises a frame, walking wheels, a grass pulling mechanism and an auxiliary power mechanism. The frame is provided with a cutting space. A spiral roller cutter is rotationally connected into the cutting space, and a fixed dead knife is connected into the cutting space. The number of the walking wheels is two, and each walking wheel can rotate after the frame moves forwards and drive the spiral roller cutter to rotate. The grass poking mechanism is in power connection with the two walking wheels and can poke grass leaves accumulated on the fixed dead knife backwards. And the auxiliary power mechanism is connected with the frame and the grass pulling mechanism, and can assist the walking wheels to support the frame, and the auxiliary walking wheels provide kinetic energy for the grass pulling mechanism. According to the hand-push type small mower for lawn maintenance, cut grass leaves can be poked to the rear, accumulation of the grass leaves on the fixed dead knife can be effectively avoided, meanwhile, part of power can be provided for the grass poking mechanism through the auxiliary power mechanism, the situation that the walking wheels stop rotating is avoided, the mowing stability is guaranteed, and practicability is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of small manual lawn mowers, and particularly relates to a push-type small lawn mower for lawn maintenance. Background Art

[0002] A lawn mower is a mechanical device used for trimming lawns, vegetation or weeds, and its core function is to achieve cutting through a rotating or reciprocating cutter. For small-scale trimming, a manual lawn mower is usually adopted. Its principle is that through manual pushing, the walking wheels are driven by a gear set or a sprocket 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 collection box behind the fixed bottom cutter. However, during the rotation and cutting process of the spiral roller cutter, most of the grass leaves usually accumulate on the fixed bottom cutter and cannot enter the grass collection box. At the same time, the grass collection box is open, and a small amount of grass leaves will be directly thrown out to the outside. For the grass leaves accumulated on the fixed bottom cutter, the staff also needs to manually dial the grass leaves accumulated on the fixed bottom cutter into the grass collection box regularly, which is time-consuming and laborious. In addition, during the mowing process, the power of the spiral roller cutter comes from the walking wheels. When encountering a slippery environment such as after rain or in the early 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 inside, and thus it may not be possible to ensure stable mowing work. Summary of the Invention

[0004] An embodiment of the present invention provides a push-type small lawn mower for lawn maintenance, aiming to solve the problem of poor practicability of the existing push-type lawn mower due to the grass leaves unable to directly transition to the grass collection box and the walking wheels unable to rotate in a slippery environment.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a push-type small lawn mower for lawn maintenance, including: A frame having a cutting space that penetrates in the horizontal direction and is open at the 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 connected; Two walking wheels are provided, and each walking wheel is rotatably arranged at both ends of the frame along the width direction of the frame, and is used for rotating after the frame moves forward and driving the spiral roller cutter to rotate; A grass-pushing mechanism is located above the fixed bottom cutter and is power-connected to the two walking wheels, and is used for pushing the grass leaves accumulated on the fixed bottom cutter backward; An auxiliary power mechanism is connected to the frame and is connected to the grass-pushing mechanism, and is used for assisting the walking wheels to support the frame and assisting the walking wheels to provide kinetic energy for the grass-pushing mechanism.

[0006] In a possible implementation, each of the walking wheels has an annular cavity, and an internal gear ring is fixedly provided in each of the annular cavities; Wherein, both ends of the spiral roller cutter extend into the two annular cavities respectively, and both ends of the spiral roller cutter are respectively connected with first driven gears for meshing with the respective internal gear rings.

[0007] In a possible implementation, the weed pushing mechanism includes: A transmission shaft, whose axis is parallel to the axes of the walking wheels and is rotatably connected to the vehicle frame. Both ends of the transmission shaft extend into the two annular cavities respectively; Pushing members, there are a plurality of them. The pushing members are arranged at annular intervals around the transmission shaft. Each pushing member includes a plurality of connecting rods arranged at intervals along the axis direction of the transmission shaft; one end of each connecting rod is fixedly connected to the transmission shaft, and the other end extends outwards and is connected with a rubber sheet; Two second driven gears, the two driven gears are respectively arranged at both ends of the transmission shaft and are respectively meshed with the two internal gear rings.

[0008] In a possible implementation, the auxiliary power mechanism includes: Two flipping arms, the two flipping arms are respectively arranged on both sides of the cutting space along the axis direction of the transmission shaft, and one end of each flipping arm is rotatably connected to the transmission shaft, and the other end of each flipping arm extends outwards; An auxiliary shaft, whose axis is parallel to the axis of the transmission shaft and is rotatably connected to the other ends of the two flipping arms; A supporting roller is rotatably sleeved on the auxiliary shaft and is located between the two flipping arms; Two supporting arms, the two supporting arms are respectively located outside the two flipping arms and are connected to the vehicle frame. Each supporting arm is used for the two ends of the auxiliary shaft to be rotatably connected; An energy storage and release assembly is arranged on the two supporting arms and is power-connected to the transmission shaft through the auxiliary shaft, and is used for energy storage and providing kinetic energy for the weed pushing mechanism during the mowing process.

[0009] In a possible implementation, rolling bearings are provided between each flipping arm and the transmission shaft; rolling bearings are provided between each flipping arm and the auxiliary shaft; a plurality of rolling bearings are provided between the auxiliary shaft and the supporting roller; rolling bearings are provided between each supporting arm and the auxiliary shaft.

[0010] In a possible implementation, the auxiliary shaft has a lumen that runs through in the axial direction; it is set that the transmission shaft rotates in the forward direction when the vehicle frame moves forward; the energy storage and release assembly includes: A chain drive structure, one end of which is connected to the auxiliary shaft and the other end is connected to the transmission shaft; A first one-way bearing, the outer ring of which is fixedly arranged on one of the support arms, the inner ring corresponds to one end of the auxiliary shaft, and a fixing column is fixedly arranged on the inner ring of the first one-way bearing; A brake structure, which is fixedly arranged on the other support arm and is connected to the other end of the auxiliary shaft for locking the auxiliary shaft; An elastic band, which is arranged in the lumen, one end of which is connected to a fixing rod in the lumen and the other end is connected to the fixing column; the elastic band is used for energy storage by reverse rotation of the fixing column, and releases potential energy and drives the auxiliary shaft, the chain drive structure and the transmission shaft to rotate forward during the forward movement of the vehicle frame and after the brake structure releases the locking of the auxiliary shaft.

[0011] In a possible implementation, there are two chain drive structures; Wherein, each of the flipping arms is provided with a cavity, and each of the chain drive structures is respectively located in each cavity.

[0012] In a possible implementation, a second one-way bearing is provided between each chain drive structure and the transmission shaft.

[0013] In a possible implementation, the outer end of the fixing column has a prism block for docking with a crank.

[0014] In a possible implementation, the small push-type lawn mower for lawn maintenance further includes a grass collection box, the grass collection box is detachably connected to the vehicle frame, and the grass collection box is located behind the fixed bottom blade and is connected to the fixed bottom blade.

[0015] Compared with the prior art, the beneficial effects of the solution shown in this implementation method are as follows: The two walking wheels provided on the frame can rotate by the friction force with the ground or grass blades during the forward movement of the frame. As a power source, the walking wheels can drive the spiral roller cutter to rotate, and then the cooperation between the spiral roller cutter and the fixed bottom cutter realizes the shearing of grass blades. The grass-pushing mechanism provided above the fixed bottom cutter can also rotate driven by the walking wheels, and then push the cut grass blades to the rear, which can effectively avoid the accumulation of grass blades on the fixed bottom cutter and also avoid the need for manual handling of the accumulated grass blades during the stop-and-go process, saving time and effort. In addition, an auxiliary power mechanism is provided. The auxiliary power mechanism can form a three-point support for the frame with each walking wheel, ensuring the stability of the frame during walking and also ensuring a fixed height for mowing. The auxiliary power mechanism can also provide part of the power for the grass-pushing mechanism to ensure that the friction force received by the walking wheels can resist the reverse torque from the grass-pushing mechanism, so that the walking wheels can rotate when receiving a small friction force, thus ensuring the stability and mowing effect of mowing, and having strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of a hand-pushed small lawn mower for lawn maintenance provided by an embodiment of the present invention Figure 1 ; Figure 2 is a schematic structural diagram of a hand-pushed small lawn mower for lawn maintenance provided by an embodiment of the present invention Figure 2 (hiding part of the armrest); Figure 3 is a schematic structural diagram of a hand-pushed small lawn mower for lawn maintenance provided by an embodiment of the present invention Figure 3 (hiding part of the armrest); Figure 4 is a schematic cross-sectional structural diagram of the auxiliary power mechanism of a hand-pushed small lawn mower for lawn maintenance provided by an embodiment of the present invention; Figure 5 is Figure 4 a schematic cross-sectional structural diagram of part A of a hand-pushed small lawn mower for lawn maintenance provided by an embodiment; DESCRIPTION OF REFERENCE NUMERALS: 10, frame; 11, armrest; 12, cutting space; 13, spiral roller cutter; 14, fixed bottom cutter; 15, first driven gear; 16, grass collection box; 20, walking wheel; 21, annular cavity; 22, internal gear ring; 30, grass-pushing mechanism; 31, transmission shaft; 32, connecting rod; 33, second driven gear; 34, rubber sheet; 40. Auxiliary power mechanism; 41. Tipping arm; 42. Auxiliary shaft; 43. Support roller; 44. Support arm; 45. Energy storage and release assembly; 451. Chain drive structure; 452. First one-way bearing; 453. Brake structure; 4531. Brake handle; 4532. Fixed housing; 4533. Rotating shaft; 4534. Rotating disk; 4535. Brake block; 4536. Spring; 454. Elastic band; 455. Fixed column; 456. Fixed rod; 457. Second one-way bearing. Detailed implementation manners

[0017] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] Please refer to Figure 1 and Figure 2 simultaneously. Now, a hand-pushed small lawn mower for lawn maintenance provided by the present invention will be described. The hand-pushed small lawn mower for lawn maintenance includes a frame 10, traveling wheels 20, a grass raking mechanism 30, and an auxiliary power mechanism 40. The frame 10 has a cutting space 12 that is horizontally through and open at the bottom. A spiral roller cutter 13 is rotatably connected in the cutting space 12, and a fixed bottom cutter 14 that cooperates with the spiral roller cutter 13 is connected. There are two traveling wheels 20, and each traveling wheel 20 is rotatably arranged at both ends of the frame 10 along the width direction of the frame 10, and can rotate after the frame 10 moves forward and drive the spiral roller cutter 13 to rotate. The grass raking mechanism 30 is located above the fixed bottom cutter 14 and is power-connected to the two traveling wheels 20, and can rake the grass leaves piled on the fixed bottom cutter 14 backward. The auxiliary power mechanism 40 is connected to the frame 10 and is also connected to the grass raking mechanism 30, and can assist the traveling wheels 20 to support the frame 10 and assist the traveling wheels 20 to provide kinetic energy for the grass raking mechanism 30.

[0019] There is a cutting space 12 that is open at the bottom and horizontally through below the frame 10, and its through direction is the traveling direction of the frame 10. Therefore, during the forward movement of the frame 10, the grass leaves will pass through the cutting space 12, first contact the spiral roller cutter 13, and fall onto the fixed bottom cutter 14 after being cut by the spiral roller cutter 13 and the fixed bottom cutter 14. The width direction of the frame 10 mentioned above is the horizontal direction perpendicular to the through direction of the cutting space 12.

[0020] The small push-type lawn mower provided in this embodiment, compared with the prior art, the two walking wheels 20 provided on the frame 10 can rotate by the friction force with the ground or grass blades during the forward movement of the frame 10. The walking wheels 20, as the power source, can drive the spiral roller cutter 13 to rotate, and then realize the shearing of grass blades through the cooperation of the spiral roller cutter 13 and the fixed bottom cutter 14. The grass-pushing mechanism 30 provided above the fixed bottom cutter 14 can also rotate driven by the walking wheels 20, and then push the cut grass blades to the rear, which can effectively avoid the accumulation of grass blades on the fixed bottom cutter 14, and at the same time can also avoid the extra manual treatment of the accumulated grass blades during the stop-and-go process, saving time and effort. In addition, an auxiliary power mechanism 40 is also provided. The auxiliary power mechanism 40 can form a three-point support for the frame 10 with each walking wheel 20, ensuring the stability of the frame 10 during walking, and at the same time can also ensure the fixed height of mowing. The auxiliary power mechanism 40 can also provide part of the power for the grass-pushing mechanism 30 to ensure that the friction force received by the walking wheels 20 can resist the reverse torque from the grass-pushing mechanism 30, so as to ensure that the walking wheels 20 can rotate when receiving a small friction force, and then ensure the stability of mowing and the mowing effect, with strong practicability.

[0021] It should be noted that, as the basis of the overall structure, the frame 10 is also connected with a handrail 11, which is convenient for the staff to push the frame 10 forward. This technology is the prior art and will not be elaborated here.

[0022] In some embodiments, the above-mentioned walking wheels 20 and spiral roller cutter 13 can adopt the structure as Figure 2 shown. See Figure 2 , each walking wheel 20 has an annular cavity 21, which can be arranged around the axis of the walking wheel 20. One side of each annular cavity 21 is open, and the open ends of the annular cavities 21 in the two walking wheels 20 face each other. The open ends of the annular cavities 21 of each walking wheel 20 are blocked by the frame 10. See Figure 2 and Figure 3 . An internal gear ring 22 is fixedly installed in each annular cavity 21. The axis of the internal gear ring 22 is coaxial with the axis of the walking wheel 20 axis, and the internal gear ring 22 has an annular internal tooth surface.

[0023] Specifically, both ends of the spiral roller cutter 13 extend into the two annular cavities 21 respectively, and both ends of the spiral roller cutter 13 are respectively connected with first driven gears 15 that can mesh with the respective internal gear rings 22.

[0024] The spiral roller cutter 13 is power-connected to the internal gear rings 22 in the two traveling wheels 20 respectively through two first driven gears 15. The power can be efficiently transmitted through the gear meshing method, and at the same time, a large load-bearing capacity can be ensured, and the compactness and reliability are relatively high. The annular cavity 21 blocks the internal gear ring 22 and the first driven gear 15, and can also prevent grass leaves from entering, thereby ensuring the stability of the transmission between the two.

[0025] The structure of the spiral roller cutter 13 and the power connection between the spiral roller cutter 13 and the traveling wheel 20 are prior arts and will not be elaborated here.

[0026] In some embodiments, the above-mentioned grass-pushing mechanism 30 can adopt the structure as Figure 2 shown. Refer to Figure 2 , the grass-pushing mechanism 30 includes a transmission shaft 31, grass-pushing members, and two second driven gears 33. The axis of the transmission shaft 31 is parallel to the axes of the traveling wheels 20, and is rotatably connected to the frame 10. Both ends of the transmission shaft 31 extend into the two annular cavities 21 respectively. There are multiple grass-pushing members, and the grass-pushing members are arranged at intervals around the transmission shaft 31 in a ring shape. Each grass-pushing member includes multiple connecting rods 32 arranged at intervals along the axis direction of the transmission shaft 31. One end of each connecting rod 32 is fixedly connected to the transmission shaft 31, and the other end extends outwards and is connected with a rubber sheet 34. There are two second driven gears 33, and the two driven gears are respectively arranged at both ends of the transmission shaft 31 and are respectively meshed with the two internal gear rings 22.

[0027] The axis of the transmission shaft 31 is parallel to that of the traveling wheel 20. The transmission shaft 31 needs to be located behind the spiral roller cutter 13. The transmission shaft 31 is power-connected to the internal gear ring 22 through the second driven gear 33. Through this kind of gear connection method, the power can be efficiently transmitted, and at the same time, a large load-bearing capacity can be ensured, and the compactness and reliability are relatively high. In addition, the second driven gear 33 is located inside the annular cavity 21, and can also avoid being affected by the cut grass leaves, ensuring the stability of power transmission. The multiple grass-pushing members can rotate with the transmission shaft 31. Each connecting rod 32 in each grass-pushing member can ensure the coverage of the entire fixed bottom cutter 14. The rubber sheet 34 can ensure flexible contact with the fixed bottom cutter 14, avoiding damage to the fixed bottom cutter 14, and at the same time, can also ensure the cleaning effect of the grass leaves on the fixed bottom cutter 14.

[0028] During the forward movement of the traveling wheel 20, it will rotate forward. At this time, the internal gear ring 22 will drive the second driven gear 33 to rotate forward, thereby realizing the forward rotation of the transmission shaft 31. The connecting rod 32 on the transmission shaft 31 drives each rubber sheet 34 to push the grass leaves piled on the fixed bottom cutter 14 backward, thereby avoiding the accumulation of grass leaves on the fixed bottom cutter 14.

[0029] In some embodiments, the above-mentioned auxiliary power mechanism 40 can adopt the structure asFigure 2 and Figure 3 the structure shown. Refer to Figure 2 and Figure 3 , the auxiliary power mechanism 40 includes a tipping arm 41, an auxiliary shaft 42, a support roller 43, a support arm 44 and an energy storage and release assembly 45. There are two tipping arms 41, and the two tipping arms 41 are respectively arranged on both sides of the cutting space 12 along the axis direction of the transmission shaft 31, and one end of each tipping arm 41 is rotatably connected to the transmission shaft 31, and the other end of each tipping arm 41 extends outwards. The axis of the auxiliary shaft 42 is arranged parallel to the axis of the transmission shaft 31 and is rotatably connected to the other ends of the two tipping arms 41. The support roller 43 is rotatably sleeved on the auxiliary shaft 42 and is located between the two tipping arms 41. There are two support arms 44, and the two support arms 44 are respectively located outside the two tipping arms 41 and are connected to the vehicle frame 10, and both ends of the auxiliary shaft 42 can be rotatably connected to each support arm 44. The energy storage and release assembly 45 is arranged on the two support arms 44 and is power-connected to the transmission shaft 31 through the auxiliary shaft 42, can store energy, and can provide kinetic energy for the grass-pulling mechanism 30 during the mowing process.

[0030] The two tipping arms 41 can ensure that the distance between the auxiliary shaft 42 and the transmission shaft 31 is fixed, and at the same time, the two support arms 44 cooperate with the two tipping arms 41 to jointly fix the position of the auxiliary shaft 42. The support arm 44 and the tipping arm 41 can form a triangular frame with the vehicle frame 10, thereby ensuring the stability of the auxiliary shaft 42 and the support roller 43, and facilitating the support roller 43 and each traveling wheel 20 to jointly support the vehicle frame 10 stably.

[0031] The support roller 43 is rotatably connected to the auxiliary shaft 42, which can avoid the support roller 43 from receiving a large reverse torque, thereby ensuring that the support roller 43 can rotate stably. The support roller 43 needs to have a certain width to ensure an increase in the friction with the ground or grass blades, thereby ensuring its stable rotation. In addition, the support roller 43 can be a hollow body to ensure a reduction in the overall weight and avoid crushing the lawn grass.

[0032] Regarding the energy storage and release assembly 45, it 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 the mowing process, thereby reducing the reverse torque received by the traveling wheels 20, and ensuring that the traveling wheels 20 can still rotate stably under the condition of receiving a small frictional force, and ensuring the mowing effect.

[0033] In this embodiment, as an implementation manner of the support arm 44, each support arm 44 can be detachably connected to the vehicle frame 10, such as bolt connection or plug-in connection with a limit post. The pitching angle of the tipping arm 41 can be adjusted by adjusting the position of the connection point of the support arm 44 on the vehicle frame 10, thereby realizing fine adjustment of the cutting edge height of the fixed bottom knife 14 and ensuring the adjustment of the cutting height of the grass blades.

[0034] In some embodiments, the above-mentioned auxiliary power mechanism 40 may adopt a structure as shown in Figures 2 to 3 . Referring to Figures 2 to 3 , rolling bearings are provided between each turning arm 41 and the transmission shaft 31 to ensure that the transmission shaft 31 can rotate freely relative to the turning arm 41. Rolling bearings are provided between each turning arm 41 and the auxiliary shaft 42 to ensure that the auxiliary shaft 42 can rotate freely relative to the turning arm 41.

[0035] Multiple rolling bearings are provided 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. Rolling bearings are provided 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.

[0036] In some embodiments, the above-mentioned energy storage and release assembly 45 may adopt a structure as shown in Figures 2 to 4 . Referring to Figures 2 to 4 , the auxiliary shaft 42 has a lumen penetrating along the axial direction, and the auxiliary shaft 42 can be a hollow metal tube. It is set that when the vehicle frame 10 moves forward, the transmission shaft 31 rotates in the positive direction.

[0037] The energy storage and release assembly 45 includes a chain drive structure 451, a first one-way bearing 452, a brake structure 453, and an elastic band 454. One end of the chain drive 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 fixedly arranged on one of the support arms 44, the inner ring corresponds to one end of the auxiliary shaft 42, and a fixed column 455 is fixedly arranged on the inner ring of the first one-way bearing 452. The brake structure 453 is fixedly arranged on the other support arm 44 and is connected to the other end of the auxiliary shaft 42, and can lock the auxiliary shaft 42. The elastic band 454 is arranged in the lumen, one end is connected to the fixed rod 456 in the lumen, and the other end is connected to the fixed column 455. The elastic band 454 can store energy by reverse rotation through the fixed column 455, and release the potential energy to drive the auxiliary shaft 42, the chain drive structure 451, and the transmission shaft 31 to rotate in the positive direction during the forward movement of the vehicle frame 10 and after the brake structure 453 releases the lock on the auxiliary shaft 42.

[0038] Regarding 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 to one of the support arms 44, which can be welded or bonded. Under the fixation of the outer ring, the inner ring cannot rotate in the forward direction, but can only rotate in the reverse direction. The brake structure 453 can lock the auxiliary shaft 42 at the other end of the auxiliary shaft 42 to prevent the auxiliary shaft 42 from rotating. At this time, the fixed column 455 can be rotated in the reverse direction by a tool such as an external crank, and one end of the elastic band 454 is pulled in the reverse direction by the fixed column 455, and the other end of the elastic band 454 is fixed. Therefore, this step will convert the kinetic energy of the crank into the elastic potential energy of the elastic band 454, and the auxiliary shaft 42 cannot rotate under the locking of the brake structure 453.

[0039] When mowing, the frame 10 moves forward under the push of the staff. When the walking wheel 20 does not rotate, the brake structure 453 can be manually controlled to release the lock of the auxiliary shaft 42. At this time, the elastic belt 454 will convert the elastic potential energy into the kinetic energy of the auxiliary shaft 42, so that the auxiliary shaft 42 rotates forward. Then the auxiliary shaft 42 drives the transmission shaft 31 to rotate forward through the chain transmission structure 451 to reduce the reverse torque of the walking wheel 20 from the transmission shaft 31, or directly drives the walking wheel 20 forward through the transmission shaft 31 to ensure the mowing effect.

[0040] The energy storage and release component 45 does not require an external electric drive. It only needs to store energy through human power before encountering a slippery environment, and can release the stored energy through the brake structure 453 after the walking wheel 20 stops working. It can adapt to the situation where the friction of the walking wheel 20 is small and reduce the reverse torque exerted on the walking wheel 20. At the same time, it can ensure the cutting effect and cutting stability. It has a simple structure, is easy to operate, and is highly practical.

[0041] As the brake assembly in this embodiment, see Figure 1 , 4 and Figure 5 The brake assembly may include a brake handle 4531 disposed on the handrail 11, a fixed housing 4532 fixedly disposed on another support arm 44, a rotating shaft 4533 located in the fixed housing 4532 and fixedly connected to the other end of the auxiliary shaft 42, a rotating disk 4534 coaxially disposed on the rotating shaft 4533, a brake block 4535 disposed in the fixed housing 4532 along the radial limited sliding of the rotating disk 4534, and a spring 4536 located in the fixed housing 4532 and capable of pushing the brake block 4535 to keep in continuous contact with the outer edge surface of the rotating disk 4534. The brake block 4535 is fixedly connected to the metal wire connected to the brake handle 4531. The brake block 4535 has a friction surface adapted to the outer edge surface of the rotating disk 4534.

[0042] During the energy storage stage, the spring 4536 pushes the brake block 4535 closer to and against the outer edge surface of the rotating disk 4534. At this time, the rotating disk 4534 cannot rotate, and thus the auxiliary shaft 42 cannot rotate either. When the staff tightly holds the brake handle 4531, the wire in the brake handle 4531 will pull the brake block 4535 to move in the reverse direction, thereby releasing the locking of the rotating disk 4534. At this time, the elastic band 454 drives the auxiliary shaft 42 to rotate forward.

[0043] In some embodiments, the above-mentioned chain drive structure 451 may adopt a structure such as Figure 3 and Figure 4 as shown. Refer to Figure 3 and Figure 4 , two chain drive structures 451 are provided. The setting of the two chain drive structures 451 can ensure the stability of power transmission.

[0044] Specifically, each turning arm 41 is provided with a cavity, and each chain drive structure 451 is respectively located in each cavity, that is, each turning arm 41 is a shell-like structure. This structure can ensure that the chain drive structure 451 is covered, thereby preventing the cut grass leaves from falling into the chain drive structure 451 and ensuring the stable operation of the chain drive structure 451.

[0045] In this embodiment, the chain drive structure 451 may include two sprockets and a drive chain. One of the sprockets corresponds to the drive shaft 31, and the other sprocket corresponds to the auxiliary shaft 42.

[0046] In some embodiments, the above-mentioned chain drive structure 451 may adopt a structure such as Figure 4 as shown. Refer to Figure 4 , a second one-way bearing 457 is provided between each chain drive structure 451 and the drive shaft 31. When the auxiliary shaft 42 is stationary, the forward rotation of the drive shaft 31 will drive the auxiliary shaft 42 to rotate forward at the same time, which results in only being able to release the energy of the elastic band 454 once and cannot be flexibly controlled. The setting of the second one-way bearing 457, with the inner ring coaxially connected to the drive shaft 31 and the outer ring coaxially connected to the corresponding sprocket, the inner ring can freely rotate forward, and the outer ring can drive the inner ring to rotate forward. This structure can ensure that the drive shaft 31 cannot transmit power to the auxiliary shaft 42 during the forward rotation process, and the auxiliary shaft 42 can continuously remain stationary. This structure can ensure the flexible control of the brake structure 453. It only needs to release the locking of the brake structure 453 on the auxiliary shaft 42 when the traveling wheel 20 does not rotate or cannot rotate. The structure is simple, the cost is low, and it can effectively ensure the flexible release of energy by the energy storage and release assembly 45.

[0047] In some embodiments, the above-mentioned fixed column 455 may adopt a structure such as Figure 4 as shown. Refer toFigure 4 , the outer end of the fixed column 455 has a prism block for docking with the crank, and the setting of the prism block can ensure the plug-in limitation with the crank, thereby ensuring that the crank can drive the fixed column 455 to rotate in the reverse direction.

[0048] In some embodiments, refer to Figure 1 , the hand-pushed small lawn mower for lawn maintenance further includes a grass collection box 16. The grass collection box 16 is detachably connected to the vehicle frame 10, and the grass collection box 16 is located behind the fixed bottom knife 14 and is connected to the fixed bottom knife 14. The setting of the grass collection box 16 can ensure the collection of small cut grass leaves. The detachable connection between the grass collection box 16 and the vehicle frame 10 is a prior art and will not be elaborated here.

[0049] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A small push lawn mower for lawn maintenance, characterized in that: include: The frame has a cutting space which is horizontally continuous and open at the bottom; A spiral roller cutter is rotatably connected in the cutting space, and a fixed bottom cutter matched with the spiral roller cutter is connected; Two running wheels are provided, each of which is rotatably arranged at both ends of the frame along the width direction of the frame, and is used to rotate after the frame moves forward and drive the spiral roller to rotate; A grass-pushing mechanism, located above the fixed bed knife and connected to the two walking wheels, is used to push the grass leaves accumulated on the fixed bed knife backwards; An auxiliary power mechanism is connected to the frame and the grass-clearing mechanism, and is used to assist the running wheels in supporting the frame and assist the running wheels in providing kinetic energy for the grass-clearing mechanism.

2. The small hand-push lawn mower for lawn maintenance as claimed in claim 1, characterized in that: Each of the travel wheels has an annular cavity, and an internal gear ring is fixedly arranged in each of the annular cavities; Wherein, both ends of the spiral roller cutter extend into the two annular cavities respectively, and both ends of the spiral roller cutter are respectively connected to a first driven gear for meshing with each of the internal gear rings.

3. The small hand-push lawn mower for lawn maintenance as claimed in claim 2, characterized in that: The grass-pulling mechanism comprises: A transmission shaft, the axis of which is arranged parallel to the axis of each of the running wheels and is rotatably connected to the frame, and the two ends of the transmission shaft extend into the two annular cavities respectively; There are multiple material-digging pieces, each of which is arranged in an annular manner around the transmission shaft, and each of which includes multiple connecting rods arranged in an axial direction of the transmission shaft; one end of each connecting rod is fixedly connected to the transmission shaft, and the other end extends outward and is connected to a rubber sheet; There are two second driven gears, which are respectively arranged at two ends of the transmission shaft and meshed with the two internal gear rings respectively.

4. The small hand-push lawn mower for lawn maintenance as claimed in claim 3, characterized in that: The auxiliary power mechanism comprises: There are two flip arms, which are respectively arranged on both sides of the cutting space along the axial direction of the transmission shaft, and one end of each flip arm is rotatably connected to the transmission shaft, and the other end of each flip arm extends outward; An auxiliary shaft, the axis of which is arranged parallel to the axis of the transmission shaft and is rotationally connected to the other ends of the two flip arms; A supporting roller is rotatably sleeved on the auxiliary shaft and is located between the two turning arms; Two support arms are provided, the two support arms are respectively located outside the two flip arms and connected to the vehicle frame, and each support arm is used for rotationally connecting the two ends of the auxiliary shaft; The energy storage and release assembly is arranged on the two support arms and is dynamically connected to the transmission shaft through the auxiliary shaft. It is used for storing energy and providing kinetic energy for the grass-moving mechanism during the mowing process.

5. The small hand-push lawn mower for lawn maintenance as claimed in claim 4, characterized in that: A rolling bearing is provided between each of the flip arms and the transmission shaft; a rolling bearing is provided between each of the flip arms and the auxiliary shaft; a plurality of rolling bearings are provided between the auxiliary shaft and the supporting roller; and a rolling bearing is provided between each of the supporting arms and the auxiliary shaft.

6. The small hand-push lawn mower for lawn maintenance as claimed in claim 4, characterized in that: The auxiliary shaft has a tubular cavity that penetrates along the axial direction; when the frame is set to move forward, the transmission shaft rotates in the positive direction; the energy storage and release assembly includes: A chain transmission structure, one end of which is connected to the auxiliary shaft and the other end of which is connected to the transmission shaft; A first one-way bearing, the outer ring of which is fixed on one of the support arms, the inner ring of which corresponds to one end of the auxiliary shaft, and the inner ring of which is fixed with a fixing column; A brake structure, fixedly mounted on the other support arm and connected to the other end of the auxiliary shaft, for locking the auxiliary shaft; An elastic belt is arranged in the tubular cavity, one end of which is connected to the fixed rod in the tubular cavity, and the other end is connected to the fixed column; the elastic belt is used to store energy through the reverse rotation of the fixed column, and when the frame moves forward and the brake structure releases the lock on the auxiliary shaft, the elastic belt releases the potential energy and drives the auxiliary shaft, the chain transmission structure and the transmission shaft to rotate forward.

7. The small hand-push lawn mower for lawn maintenance as claimed in claim 6, characterized in that: The chain transmission structure is provided with two; Wherein, each of the flip arms is provided with a cavity, and each of the chain transmission structures is located in each of the cavities respectively.

8. The small hand-push lawn mower for lawn maintenance as claimed in claim 7, characterized in that: A second one-way bearing is provided between each of the chain transmission structures and the transmission shaft.

9. The small push lawn mower for lawn maintenance as claimed in claim 6, characterized in that: The outer end of the fixed column is provided with a prism block for the crank to butt against.

10. The small push lawn mower for lawn maintenance as claimed in claim 1, characterized in that: The small hand-push lawn mower for lawn maintenance further comprises a grass collecting frame, which is detachably connected to the vehicle frame, and is located behind the fixed bed knife and connected to the fixed bed knife.

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