Lawn mower

Abstract

The present invention discloses a lawn mower, which belongs to the technical field of lawn mowers. It mainly includes a machine body, with a grass inlet fixedly opened at the front end of the machine body, a protection ring fixedly connected to the inner wall of the bottom of the machine body, a rotating cavity fixedly opened at the upper end inside the machine body, a grass passing opening fixedly opened at the rear of the rotating cavity, a top cover fixedly connected to the top of the machine body, a power mechanism fixedly arranged on the top cover, a weed conveying mechanism and a grass cutting mechanism fixedly arranged at the bottom of the power mechanism, and a grass box fixedly installed at the rear of the machine body. By setting the grass cutting mechanism in the present invention, when the rotating cutter disc contacts hard objects such as iron wires, a speed difference is formed between the rotating cutter disc and the transmission shaft due to the collision. In an extremely short time, the brake connecting disc is braked to drive the rotating cutter disc to quickly brake. At the same time, the rotating cutter disc moves upward by a certain distance, separating the flat cutting knife from the guiding cogs, and aligning the flat cutting knife with the middle of the protection ring, increasing the probability that the damaged and broken flat cutting knife impacts the protection ring and improving the safety of the lawn mower. The present invention is mainly used for trimming lawns.

Description

Technical Field

[0001] The present invention belongs to the technical field of lawn mowers, and more particularly, to a lawn mower. Background Art

[0002] A lawn mower is a mechanical device capable of trimming vegetation such as lawns and grasslands, which can create a clean and orderly green space for places such as lawns, courtyards, and parks, enhancing the overall landscape effect. With the continuous development of technology, lawn mowers gradually have better trimming performance and provide safer operation guarantees for users.

[0003] Chinese Patent with Publication No. "CN118318596A" discloses an emergency protection device for an intelligent lawn mower, including a lawn mower body, an emergency stop switch button, and a stepping component. The stepping component includes a pedal under the tail end of the lawn mower body. A first column is fixedly provided at the top of the pedal, and the first column extends above the lawn mower body. There is also a pressing plate corresponding to the emergency stop switch button and used to press the emergency stop switch button, which can achieve the pressing and emergency stop of the emergency stop switch button by foot, without the need to bend down and reach out for operation, being convenient and fast and easy to use.

[0004] In the later use process, the device still has the following problems: when the cutting blade of the lawn mower cuts into a relatively hard object such as a stone, it is easy to cause the cutting blade to be damaged and broken, and be thrown out under the high-speed rotation of the cutter head, posing a safety hazard to the user. Such a situation occurs urgently, and the user cannot turn off the lawn mower in the first time by stepping on the pressing plate. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a lawn mower. By setting a mowing mechanism, when the rotating cutter head contacts a hard object such as a wire, the rotating cutter head forms a speed difference with the transmission shaft due to the collision. Within an extremely short time, the brake connection disk is braked to drive the rotating cutter head to quickly brake. At the same time, the rotating cutter head moves upward by a certain distance, separating the flat cutter from the guiding teeth, and aligning the flat cutter with the middle of the protection ring, increasing the probability that the damaged and broken flat cutter impacts the protection ring, and improving the safety of the lawn mower.

[0006] The described lawn mower includes a machine body. Walking wheels are rotatably installed on both sides of the machine body. A grass inlet is fixedly opened at the front end of the machine body. A fixed platform is fixedly connected to the bottom end inside the machine body. Guide teeth are fixedly opened at the front part of the fixed platform. A friction plate one is fixedly connected to the top of the fixed platform. A protective ring is fixedly connected to the inner bottom wall of the machine body. A rotating cavity is fixedly opened at the upper end inside the machine body. A grass passing opening is fixedly opened at the rear part of the rotating cavity. A guide block is fixedly connected to the grass passing opening. A top cover is fixedly connected to the top of the machine body. A power mechanism is fixedly provided on the top cover. A fixed frame is fixedly connected to the center inside the top cover. A mounting shaft tube is fixedly connected to the center of the fixed frame. A fixed shaft is fixedly connected to one side inside the top cover. A weed conveying mechanism and a grass cutting mechanism are fixedly provided at the bottom of the power mechanism. A grass box is fixedly installed at the rear of the machine body. A handle is fixedly connected to the top of the grass box.

[0007] Preferably, the power mechanism includes a driving motor. The driving motor is fixedly connected to the top of the top cover. The output shaft of the driving motor is fixedly connected to a transmission shaft. The transmission shaft extends inward into the top cover. The middle part of the transmission shaft is rotatably connected to the inner wall of the mounting shaft tube. A gear one is fixedly connected to the upper end of the transmission shaft. The gear one is meshed with a gear two. The gear two is rotatably connected to the fixed shaft. A gear three is fixedly connected to the bottom of the gear two. The gear three is meshed with a gear four. The gear four is rotatably connected to the outer wall of the mounting shaft tube.

[0008] Preferably, the weed conveying mechanism includes a baffle. The baffle is matched with the top of the rotating cavity. The top of the baffle is fixedly connected to the gear four. A connecting rod is fixedly connected to the bottom of the baffle. The other end of the connecting rod is fixedly connected to a conveying circle. The conveying circle is rotatably connected to the bottom of the rotating cavity. The conveying circle is matched with the guide block.

[0009] Preferably, the grass cutting mechanism includes a transmission turntable. The top of the transmission turntable is fixedly connected to the bottom of the transmission shaft. A braking connection disc is arranged at the bottom of the transmission turntable. The braking connection disc is matched with the transmission turntable. A rotating cutter disc is axially fixedly connected to the side wall of the braking connection disc. The rotating cutter disc is matched with the transmission turntable.

[0010] Preferably, a plurality of flat cutting knives are fixedly connected to the bottom of the outer wall of the rotating cutter disc. An inclined pushing plate is fixedly connected to the top of the flat cutting knife. A guiding convex strip is fixedly connected to the inclined pushing plate. A top pressing wedge block one and a locking frame are fixedly connected to the inner wall at the top of the rotating cutter disc. Limiting teeth are fixedly connected to the inner wall of the rotating cutter disc.

[0011] Preferably, a tooth groove is fixedly opened on the outer wall of the braking connection disc. The tooth groove is slidably connected to the limiting teeth. A friction plate two is fixedly connected to the bottom of the braking connection disc. The friction plate two is matched with the friction plate one. A compression spring one is fixedly connected to the center of the top of the braking connection disc. The other end of the compression spring one is rotatably connected to the bottom of the transmission turntable. A fixed rod is fixedly connected to the outer side of the top of the braking connection disc. A driven wedge block one is fixedly connected to the top of the fixed rod.

[0012] Preferably, a locking rod is fixedly connected to the top of the transmission turntable. The locking rod cooperates with the locking frame. A through groove is fixedly formed on the transmission turntable and cooperates with the first driven wedge block. A sliding groove is formed on the through groove and slidably cooperates with the first driven wedge block. An extrusion top block is slidably connected in the sliding groove. A second compression spring is fixedly connected to the rear of the extrusion top block, and the rear of the second compression spring is fixedly connected to the side wall of the through groove. A second driving wedge block is fixedly provided at the front of the extrusion top block and cooperates with the first driven wedge block. A second top pressing wedge block is fixedly connected to the top of the extrusion top block. The second top pressing wedge block extends upward out of the sliding groove and cooperates with the first top pressing wedge block.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. By setting the power mechanism, the torque of the driving motor is directly output to the mowing mechanism, and the torque of the driving motor is output to the weed conveying mechanism after being decelerated and amplified, so as to drive the lawn mower to cut the grass and recycle the shredded grass;

[0015] 2. By setting the weed conveying mechanism, the weeds cut and falling into the conveying circle are transported backward to the grass passing port and enter the grass box under the push of the guiding block, avoiding the shredded grass cut from continuing to stay on the lawn and affecting the viewing experience of the landscape;

[0016] 3. By setting the mowing mechanism, the transmission shaft drives the rotating cutter disc to rotate for grass cutting operation. When the rotating cutter disc touches hard objects such as iron wires, a speed difference is formed between the rotating cutter disc and the transmission shaft due to the collision. In an extremely short time, the braking connecting disc rotates backward relative to the transmission turntable, and the two are quickly axially separated. The braking connecting disc moves downward under the push of the first compression spring, and the second friction plate contacts the first friction plate. The braking connecting disc drives the rotating cutter disc to quickly brake. At the same time, the locking rod disengages from the locking frame, and the first top pressing wedge block squeezes and contacts the second top pressing wedge block, causing the rotating cutter disc to move upward by a certain distance, separating the flat cutting knife from the guiding teeth, avoiding further damage to the flat cutting knife, and at the same time aligning the flat cutting knife with the middle of the protection ring, increasing the probability of the damaged and broken flat cutting knife hitting the protection ring, avoiding the damaged and broken flat cutting knife flying out from the bottom of the machine body and injuring people, and improving the safety of the lawn mower. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is the overall structural schematic diagram of the present invention;

[0018] Figure 2 is the bottom structural schematic diagram of the present invention;

[0019] Figure 3 is the internal structural schematic diagram of the present invention;

[0020] Figure 4 is the internal structural schematic diagram of the machine body;

[0021] Figure 5Schematic diagram of the structure of the body and the weed conveying mechanism;

[0022] Figure 6 Schematic diagram of the structure of the power mechanism;

[0023] Figure 7 Schematic diagram of the internal structure of the top cover;

[0024] Figure 8 Schematic diagram of the internal structure of the mowing mechanism;

[0025] Figure 9 Schematic diagram of the bottom structure of the mowing mechanism;

[0026] Figure 10 Schematic diagram of the exploded structure of the mowing mechanism;

[0027] Figure 11 Schematic diagram of the top structure of the rotating cutter disc;

[0028] Figure 12 Schematic diagram of the bottom structure of the rotating cutter disc;

[0029] Figure 13 Schematic diagram of the structure of the braking connection disc;

[0030] Figure 14 Schematic diagram of the structure of the transmission turntable;

[0031] Figure 15 Schematic diagram of the structure of the extrusion top block;

[0032] Figure 16 Schematic diagram of the mating structure of the extrusion top block and the braking connection disc.

[0033] In the figure, 1 is the body; 101 are the traveling wheels; 102 is the grass inlet; 103 is the top cover; 103A is the fixing frame; 103B is the mounting shaft tube; 103C is the fixing shaft; 104 is the fixing table; 104A are the guiding cogs; 104B is the first friction plate; 105 is the grass passing opening; 105A is the guiding block; 106 is the rotating cavity; 107 is the protection ring; 2 is the grass box; 201 is the handle; 3 is the power mechanism; 301 is the driving motor; 302 is the transmission shaft; 303 is the first gear; 304 is the second gear; 305 is the third gear; 306 is the fourth gear; 4 is the weed conveying mechanism; 401 is the baffle; 402 is the connecting rod; 403 is the conveying circle; 5 is the mowing mechanism; 501 is the rotating cutter disc; 501A is the flat cutting knife; 501B is the inclined pushing plate; 501C is the guiding rib; 501D is the limiting tooth; 501E is the first pressing wedge; 501F is the locking frame; 502 is the braking connection disc; 502A is the tooth groove; 502B is the fixing rod; 502C is the first driven wedge; 502D is the first compression spring; 502E is the second friction plate; 503 is the transmission rotating disc; 503A is the through groove; 503B is the sliding groove; 503C is the locking rod; 504 is the extrusion top block; 504A is the second compression spring; 504B is the second driving wedge; 504C is the second pressing wedge. Detailed implementation mode

[0034] The present invention will be further described below with reference to the accompanying drawings:

[0035] In the paragraphs of detailed description, the orientation nouns involved are only for the convenience of those skilled in the art to understand the technical solutions described in this application according to the visual orientation shown in the accompanying drawings. Unless otherwise clearly specified and limited, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0036] As Figure 1 and Figure 2 shown, a lawn mower includes a body 1. Traveling wheels 101 are rotatably installed on both sides of the body 1. A grass inlet 102 is fixedly opened at the front end of the body 1. As Figure 4As shown, a fixed platform 104 is fixedly connected to the bottom end inside the body 1. A guiding serration 104A is fixedly formed at the front of the fixed platform 104. The guiding serration 104A can comb the grass and play a role in fixing and limiting the grass, facilitating the cooperation between the mowing mechanism 5 and the guiding serration 104A to complete the efficient mowing operation of the grass. Without the guiding serration 104A, relying solely on the working mode of the high-speed rotation of the mowing mechanism 5 to cut the grass, the mowing mechanism 5 must rotate at a higher speed, and the cutting effect is not good. The trimming height of the grass is easily uneven. At the same time, the setting of the fixed platform 104 protects the rotary cutter disc 501, preventing hard objects such as stones from directly contacting the rotary cutter disc 501 and causing damage. A friction plate 104B is fixedly connected to the top of the fixed platform 104. A protective ring 107 is fixedly connected to the inner bottom wall of the body 1. The protective ring 107 is made of hard metal and surrounds the rotary cutter disc 501, preventing the cutter disc 501 from being thrown out of the body 1 due to accidental fracture and injuring the operator. A rotating cavity 106 is fixedly formed at the upper end inside the body 1. A grass passing opening 105 is fixedly formed at the rear of the rotating cavity 106. A guiding block 105A is fixedly connected to the grass passing opening 105. The guiding block 105A pushes the shredded grass on the conveying loop 403 backward into the grass passing opening 105 and into the grass box 2. A top cover 103 is fixedly connected to the top of the body 1. A power mechanism 3 is fixedly provided on the top cover 103. By setting the power mechanism 3, the torque of the driving motor 301 is directly output to the mowing mechanism 5, and the torque of the driving motor 301 is output to the weed conveying mechanism 4 after being reduced and amplified, thereby driving the lawn mower to cut the grass and recycle the shredded grass.

[0037] As Figure 7 As shown, a fixing frame 103A is fixedly connected to the center inside the top cover 103. A mounting shaft tube 103B is fixedly connected to the center of the fixing frame 103A. A fixing shaft 103C is fixedly connected to one side inside the top cover 103. A weed conveying mechanism 4 and a mowing mechanism 5 are fixedly provided at the bottom of the power mechanism 3. By setting the weed conveying mechanism 4, the weeds cut and falling into the conveying loop 403 are transported backward to the grass passing opening 105 and enter the grass box 2 under the push of the guiding block 105A, preventing the shredded grass cut from remaining on the lawn and affecting the landscape viewing experience.

[0038] By setting up the mowing mechanism 5, the transmission shaft 302 drives the rotating blade disc 501 to rotate and cut the grass. When the rotating blade disc 501 contacts a hard object such as iron wire, the rotating blade disc 501 instantly forms a speed difference with the transmission shaft 302 due to the collision, and the two rotate relative to each other. The brake connecting plate 502 rotates backward relative to the transmission rotating plate 503. At this time, the driven wedge block 1 502C reversely squeezes the driving wedge block 2 504B backward until the driven wedge block 1 502C moves backward to the area of the through groove 503A. While the driven wedge block 1 502C and the driving wedge block 2 504B are squeezed laterally, the driven wedge block 1 502C also moves downward through the through groove 503A and leaves the slide groove 503B. The brake connecting plate 502 is pushed by the compression spring 1 502D. The friction plate 2 502E contacts the friction plate 1 104B, and the brake connection plate 502 drives the rotating blade 501 to gradually stop; and at the same time, the rotating blade 501 rotates backward relative to the transmission rotating plate 503, so that the lock rod 503C is separated from the lock frame 501F, and the top pressing wedge block 1 501E squeezes and contacts the top pressing wedge block 2 504C, so that the rotating blade 501 moves upward for a distance, so that the flat cutter 501A is separated from the guide clamping tooth 104A to prevent the flat cutter 501A from being further damaged, and at the same time, the flat cutter 501A is aligned with the middle of the protection ring 107, so as to increase the probability that the damaged and broken flat cutter 501A hits the protection ring 107, and prevents the flat cutter 501A from flying out from the bottom of the machine body 1 and injuring people after being damaged and broken, thereby improving the safety of the lawn mower. A grass box 2 is fixedly installed at the rear of the machine body 1, and the cut grass is stored in the grass box 2 and uniformly recycled; a handle 201 is fixedly connected to the top of the grass box 2.

[0039] like Figure 3 As shown, the power mechanism 3 includes a driving motor 301, which is fixedly connected to the top of the top cover 103, and the output shaft of the driving motor 301 is fixedly connected to the transmission shaft 302, which extends inward into the top cover 103, and the middle part of the transmission shaft 302 is rotatably connected to the inner wall of the mounting shaft tube 103B, and the upper end of the transmission shaft 302 is fixedly connected to a gear 1 303, and the gear 1 303 is meshingly connected to a gear 2 304, and the gear 2 304 is rotatably connected to the fixed shaft 103C, and the bottom of the gear 2 304 is fixedly connected to a gear 3 305, and the gear 3 305 is meshingly connected to a gear 4 306, and the gear 4 306 is rotatably connected to the outer wall of the mounting shaft tube 103B. The power of the driving motor 301 is directly transmitted to the mowing mechanism 5 through the transmission shaft 302. The mowing mechanism 5 rotates at a relatively high speed to mow the lawn. The rotation of the transmission shaft 302 sequentially drives the gear 1 303, the gear 2 304, the gear 3 305, the gear 4 306 and finally drives the weed conveying mechanism 4 to rotate. After the deceleration of each level of gears, the weed conveying mechanism 4 rotates at a relatively slow speed to collect and convey the cut grass.

[0040] like Figure 5 andFigure 6 As shown in the figure, the weed conveying mechanism 4 includes a baffle 401. The baffle 401 is rotatably connected to the top of the rotating cavity 106, covering the top of the rotating cavity 106, which can prevent the cut grass fragments from flying upward into the power mechanism 3 and affecting the meshing of each level of gears. The baffle 401 cooperates with the top of the rotating cavity 106. The top of the baffle 401 is fixedly connected to the fourth gear 306. A connecting rod 402 is fixedly connected to the bottom of the baffle 401. The other end of the connecting rod 402 is fixedly connected to a conveying loop 403. The conveying loop 403 is rotatably connected to the bottom of the rotating cavity 106 and cooperates with the guiding block 105A. Multiple groups of convex strips are provided on the surface of the conveying loop 403, which can increase the friction between the grass fragments and the conveying loop 403 and improve the conveying efficiency.

[0041] As Figure 8 and Figure 10 shown in the figure, the mowing mechanism 5 includes a transmission turntable 503. The top of the transmission turntable 503 is fixedly connected to the bottom of the transmission shaft 302. A braking connection disc 502 is provided at the bottom of the transmission turntable 503. The braking connection disc 502 cooperates with the transmission turntable 503. The side wall of the braking connection disc 502 is axially fixedly connected with a rotary cutter disc 501. The rotary cutter disc 501 cooperates with the transmission turntable 503. When the transmission turntable 503 rotates, it elastically drives the braking connection disc 502 to rotate, and the braking connection disc 502 then drives the rotary cutter disc 501 to rotate to perform mowing operations on the lawn. Since the transmission turntable 503 and the braking connection disc 502 are elastically connected, they can rotate relative to each other by a certain distance.

[0042] As Figure 11 and Figure 12 shown in the figure, multiple groups of flat cutting blades 501A are fixedly connected to the bottom of the outer wall of the rotary cutter disc 501. The flat cutting blades 501A cooperate with the guiding teeth 104A to mow the lawn. By providing an inclined pushing plate 501B on the top of the flat cutting blade 501A, the cut grass fragments can be pushed obliquely upward, so that the grass fragments can fly obliquely upward into the area of the conveying loop 403 for recycling operations; an inclined pushing plate 501B is fixedly connected to the top of the flat cutting blade 501A, and a guiding convex strip 501C is fixedly connected to the inclined pushing plate 501B. The setting of the guiding convex strip 501C can ensure that the grass fragments are in full contact with the inclined pushing plate 501B, so that the grass fragments can be fully pushed by the inclined pushing plate 501B and fly obliquely upward into the conveying loop 403. A first pressing wedge 501E and a locking frame 501F are fixedly connected to the inner wall of the top of the rotary cutter disc 501, and a limiting tooth 501D is fixedly connected to the inner wall of the rotary cutter disc 501.

[0043] As Figure 9 and Figure 13As shown, a tooth groove 502A is fixedly formed on the outer wall of the braking connection disk 502. The tooth groove 502A is slidably connected to the limit tooth 501D. The rotation and braking of the braking connection disk 502 directly drive the movement of the rotary cutter disk 501, and the two can perform axial relative sliding. A second friction plate 502E is fixedly connected to the bottom of the braking connection disk 502. The second friction plate 502E cooperates with the first friction plate 104B. When the braking connection disk 502 moves downward, the second friction plate 502E contacts and rubs against the first friction plate 104B to decelerate and brake the braking connection disk 502, ensuring that the rotary cutter disk 501 stops rotating urgently. A first compression spring 502D is fixedly connected to the center of the top of the braking connection disk 502. The first compression spring 502D accumulates elastic potential energy. When the first driven wedge block 502C disengages from the sliding groove 503B, the first compression spring 502D pushes the braking connection disk 502 downward, causing the braking connection disk 502 to squeeze the fixed table 104, and the second friction plate 502E rubs against the first friction plate 104B to quickly reduce and stop the rotation speeds of the braking connection disk 502 and the rotary cutter disk 501. The other end of the first compression spring 502D is rotatably connected to the bottom of the transmission turntable 503. A fixed rod 502B is fixedly connected to the outer side of the top of the braking connection disk 502, and a first driven wedge block 502C is fixedly connected to the top of the fixed rod 502B.

[0044] As Figure 14 , Figure 15 and Figure 16 shown, a locking rod 503C is fixedly connected to the top of the transmission turntable 503. The locking rod 503C cooperates with the locking frame 501F. The engagement of the locking rod 503C and the locking frame 501F can axially fix the transmission turntable 503 and the rotary cutter disk 501, ensuring that the rotary cutter disk 501 can closely fit with the guiding engaging teeth 104A to perform lawn trimming operations. When there is a large relative rotation between the rotary cutter disk 501 and the transmission turntable 503, the locking rod 503C and the locking frame 501F disengage, allowing the transmission turntable 503 and the rotary cutter disk 501 to axially separate. A through groove 503A is fixedly formed on the transmission turntable 503. The through groove 503A cooperates with the first driven wedge block 502C. The width of the through groove 503A is relatively wide, allowing the first driven wedge block 502C to fall from there and disengage from the sliding groove 503B.

[0045] A chute 503B is provided on the through groove 503A. The chute 503B is in sliding fit with the first driven wedge block 502C. An extrusion top block 504 is slidably connected in the chute 503B. A second compression spring 504A is fixedly connected to the rear part of the extrusion top block 504. The rear part of the second compression spring 504A is fixedly connected to the side wall of the through groove 503A. A second driving wedge block 504B is fixedly provided at the front part of the extrusion top block 504. The second driving wedge block 504B cooperates with the first driven wedge block 502C. By providing the extrusion top block 504, the power of the transmission turntable 503 can be elastically transmitted to the braking connection disk 502. The extrusion top block 504 allows a certain relative rotation distance between the transmission turntable 503 and the braking connection disk 502, thereby avoiding torque stress concentration caused by rigid connection with the rotary cutter disk 501. At the same time, when the rotary cutter disk 501 contacts a hard object, the relative rotation distance between the two is too large, and the extrusion top block 504 will release the braking connection disk 502 downward and jack up the rotary cutter disk 501 upward. A second top pressure wedge block 504C is fixedly connected to the top of the extrusion top block 504. The second top pressure wedge block 504C extends upward out of the chute 503B. The second top pressure wedge block 504C cooperates with the first top pressure wedge block 501E.

[0046] Working principle:

[0047] 1. The operator grabs the handle 201 and pushes the lawn mower forward. The drive motor 301 is started. The grass enters the machine body 1 from the grass inlet 102 and enters between the guiding teeth 104A. The rotary cutter disk 501 drives the flat cutter 501A to rotate to cut the grass.

[0048] 2. After a large amount of shredded grass is cut, it is pushed by the inclined push plate 501B and thrown obliquely upward into the conveying circle 403. As the conveying circle 403 rotates, it moves to the rear. The shredded grass is blocked by the guiding block 105A and passes through the grass outlet 105 into the rear grass box 2 to complete the collection operation.

[0049] 3. When the rotary cutter disk 501 contacts a hard object such as a steel wire, within a short time of the collision, there is a rotational speed difference between the rotary cutter disk 501 and the transmission shaft 302, and the braking connection disk 502 and the rotary cutter disk 501 rotate backward relative to the transmission turntable 503.

[0050] 4. The locking frame 501F disengages from the locking rod 503C. The second top pressure wedge block 504C jacks up the first top pressure wedge block 501E upward, and the second driving wedge block 504B squeezes the first driven wedge block 502C downward.

[0051] 5. Thus, within an extremely short time after the collision, the rotary cutter disc 501 moves upward by a certain distance, causing the flat cutter 501A to move away from the guiding engaging teeth 104A, increasing the distance between them. The flat cutter 501A moves to the middle of the protective ring 107. The braking connection disc 502 moves downward to contact the fixed table 104, and the first friction plate 104B contacts the second friction plate 502E. The rotational speed of the rotary cutter disc 501 quickly brakes, thus greatly ensuring the safety of the lawn mower during use.

[0052] In the present invention, by providing the power mechanism 3, the torque of the driving motor 301 is directly output to the mowing mechanism 5, and the torque of the driving motor 301 is output to the weed conveying mechanism 4 after being decelerated and amplified, thereby driving the lawn mower to cut the grass and recycle the shredded grass. By providing the weed conveying mechanism 4, the weeds cut and falling into the conveying loop 403 are transported backward to the grass passing port 105 and enter the grass box 2 under the push of the guiding block 105A, preventing the shredded grass from remaining on the lawn and affecting the viewing experience of the landscape. By providing the mowing mechanism 5, the transmission shaft 302 drives the rotary cutter disc 501 to rotate for grass cutting operations. When the rotary cutter disc 501 contacts hard objects such as iron wires, the rotary cutter disc 501 forms an instantaneous speed difference with the transmission shaft 302 due to the collision. The braking connection disc 502 rotates backward relative to the transmission turntable 503. At this time, the first driven wedge block 502C squeezes the second driving wedge block 504B backward in the reverse direction. The first driven wedge block 502C moves downward and leaves the sliding groove 503B. The braking connection disc 502 moves downward under the push of the first compression spring 502D. The second friction plate 502E contacts the first friction plate 104B. The braking connection disc 502 drives the rotary cutter disc 501 to gradually brake. At the same time, the rotary cutter disc 501 rotates backward relative to the transmission turntable 503, causing the locking rod 503C to disengage from the locking frame 501F. The first pressing wedge block 501E squeezes and contacts the second pressing wedge block 504C, causing the rotary cutter disc 501 to move upward by a certain distance, separating the flat cutter 501A from the guiding engaging teeth 104A to prevent further damage to the flat cutter 501A. At the same time, the flat cutter 501A is aligned with the middle of the protective ring 107, increasing the probability of the damaged and broken flat cutter 501A hitting the protective ring 107, preventing the damaged and broken flat cutter 501A from flying out from the bottom of the machine body 1 and injuring people, and improving the safety of the lawn mower.

Claims

1. A lawn mower, characterized in that: It includes a body (1). Walking wheels (101) are rotatably installed on both sides of the body (1). A grass inlet (102) is fixedly opened at the front end of the body (1). A fixed platform (104) is fixedly connected to the bottom end inside the body (1). A guiding tooth (104A) is fixedly opened at the front part of the fixed platform (104). A friction plate I (104B) is fixedly connected to the top of the fixed platform (104). A protective ring (107) is fixedly connected to the inner bottom wall of the body (1). A rotating cavity (106) is fixedly opened at the upper end inside the body (1). A grass passing opening (105) is fixedly opened at the rear part of the rotating cavity (106). A guiding block (105A) is fixedly connected to the grass passing opening (105). A top cover (103) is fixedly connected to the top of the body (1). A power mechanism (3) is fixedly arranged on the top cover (103). A fixing frame (103A) is fixedly connected to the center inside the top cover (103). A mounting shaft tube (103B) is fixedly connected to the center of the fixing frame (103A). A fixed shaft (103C) is fixedly connected to one side inside the top cover (103). A weed conveying mechanism (4) and a grass cutting mechanism (5) are fixedly arranged at the bottom of the power mechanism (3). A grass box (2) is fixedly installed at the rear part of the body (1). A handle (201) is fixedly connected to the top of the grass box (2); The grass cutting mechanism (5) includes a driving turntable (503). A braking connection disk (502) is arranged at the bottom of the driving turntable (503). The braking connection disk (502) cooperates with the driving turntable (503). A rotating cutter disk (501) is axially fixedly connected to the side wall of the braking connection disk (502). The rotating cutter disk (501) cooperates with the driving turntable (503).

2. The lawn mower according to claim 1, characterized in that: The power mechanism (3) includes a driving motor (301). The driving motor (301) is fixedly connected to the top of the top cover (103). The output shaft of the driving motor (301) is fixedly connected to a transmission shaft (302). The transmission shaft (302) extends inward into the inside of the top cover (103). The middle part of the transmission shaft (302) is rotatably connected to the inner wall of the mounting shaft tube (103B). A gear I (303) is fixedly connected to the upper end of the transmission shaft (302). The gear I (303) is meshed and connected with a gear II (304). The gear II (304) is rotatably connected to the fixed shaft (103C). A gear III (305) is fixedly connected to the bottom of the gear II (304). The gear III (305) is meshed and connected with a gear IV (306). The gear IV (306) is rotatably connected to the outer wall of the mounting shaft tube (103B).

3. The lawn mower according to claim 1, characterized in that: The weed conveying mechanism (4) includes a baffle (401). The baffle (401) cooperates with the top of the rotating cavity (106). The top of the baffle (401) is fixedly connected to the gear IV (306). A connecting rod (402) is fixedly connected to the bottom of the baffle (401). The other end of the connecting rod (402) is fixedly connected to a conveying circle (403). The conveying circle (403) is rotatably connected to the bottom of the rotating cavity (106). The conveying circle (403) cooperates with the guiding block (105A).

4. The lawn mower according to claim 1, characterized in that: The top of the driving turntable (503) is fixedly connected to the bottom of the transmission shaft (302).

5. The lawn mower according to claim 1, characterized in that: The bottom of the outer wall of the rotating cutter disc (501) is fixedly connected with multiple groups of flat cutters (501A). The top of the flat cutter (501A) is fixedly connected with an inclined push plate (501B). The inclined push plate (501B) is fixedly connected with a guiding rib (501C). The top inner wall of the rotating cutter disc (501) is fixedly connected with a first pressing wedge block (501E) and a locking frame (501F). The inner wall of the rotating cutter disc (501) is fixedly connected with a limiting tooth (501D).

6. The lawn mower according to claim 1, wherein: The outer wall of the braking connection disc (502) is fixedly provided with a tooth groove (502A). The tooth groove (502A) is slidably connected with the limiting tooth (501D). The bottom of the braking connection disc (502) is fixedly connected with a second friction plate (502E). The second friction plate (502E) cooperates with the first friction plate (104B). The center of the top of the braking connection disc (502) is fixedly connected with a first compression spring (502D). The other end of the first compression spring (502D) is rotatably connected with the bottom of the transmission turntable (503). The outer side of the top of the braking connection disc (502) is fixedly connected with a fixed rod (502B). The top of the fixed rod (502B) is fixedly connected with a first driven wedge block (502C).

7. The lawn mower according to claim 1, characterized in that: The top of the transmission turntable (503) is fixedly connected with a locking rod (503C). The locking rod (503C) cooperates with the locking frame (501F). The transmission turntable (503) is fixedly provided with a through groove (503A). The through groove (503A) cooperates with the first driven wedge block (502C). A sliding groove (503B) is provided on the through groove (503A). The sliding groove (503B) is slidably matched with the first driven wedge block (502C). An extrusion top block (504) is slidably connected in the sliding groove (503B). The rear part of the extrusion top block (504) is fixedly connected with a second compression spring (504A). The rear part of the second compression spring (504A) is fixedly connected with the side wall of the through groove (503A). The front part of the extrusion top block (504) is fixedly provided with a second driving wedge block (504B). The second driving wedge block (504B) cooperates with the first driven wedge block (502C). The top of the extrusion top block (504) is fixedly connected with a second pressing wedge block (504C). The second pressing wedge block (504C) extends upward out of the sliding groove (503B). The second pressing wedge block (504C) cooperates with the first pressing wedge block (501E).

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