Anti-locking device for mower

Abstract

The invention relates to the technical field of mowers, in particular to an anti-jamming device for a mower, which comprises an outer shell, an equipment shell is fixedly connected to the outer wall of the top of the outer shell, a motor is arranged in the equipment shell, a main shaft is fixedly connected to the output end of the motor, and a mowing mechanism is arranged on the outer wall of the main shaft. An anti-locking mechanism is arranged above the mowing mechanism, the mowing mechanism comprises a shaft sleeve and a mounting frame, the inner ring wall of the shaft sleeve is fixedly connected with the lower portion of the outer wall of the main shaft, and a round hole is formed in the middle of the mounting frame. When the push plate is driven by the supporting frame to move in the protection shell, weeds cut off by the blade can be pushed out of the protection shell from the weed outlet, the situation that the rotation efficiency of the blade is affected by the weeds in the protection shell is avoided, correspondingly, the situation that the weeds are wound by the blade during working is reduced by pushing the weeds out of the protection shell, and the working efficiency of the blade is improved. And the working efficiency of the blade is further improved.

Description

Technical Field

[0001] The invention belongs to the technical field of lawn mowers, and in particular relates to an anti-jamming device for lawn mowers. Background Art

[0002] The lawn mower is mainly composed of a cutter disc, an engine, a traveling wheel, a traveling mechanism, a blade, an armrest and a control part. Its working principle is to utilize the high-speed rotation of the engine to drive the mowing disc to rotate at high speed through the transmission system, so that the blade installed on the disc can rotate synchronously, generate a certain cutting force, cut off the weeds and achieve the effect of weeding.

[0003] The anti-stuck device for lawn mower is an auxiliary device installed on the lawn mower. Its main function is to prevent the blade from getting stuck due to entanglement, collision, etc. during the cutting process.

[0004] However, the conventional device still has the following problems when used: When the lawn mower is working, the weeds cut by the blade will fall beside the blade. In this way, if the lawn mower is not moved in time, the cut weeds are easily stirred up again by the blade and thus entangled on the blade.

[0005] Therefore, we need an anti-stuck device for lawn mowers to solve the problem that the cut weeds will be entangled on the blade again, so as to prevent the cut weeds from being entangled on the blade. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention aims to provide an anti-jamming device for a lawn mower, which has the advantage of preventing cut weeds from being entangled on a blade.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: comprising an outer shell, an outer wall at the top of the outer shell is fixedly connected to a device shell, a motor is arranged inside the device shell, an output end of the motor is fixedly connected to a main shaft, a mowing mechanism is arranged on the outer wall of the main shaft, an anti-jamming mechanism is arranged above the mowing mechanism, the mowing mechanism comprises a sleeve and a mounting frame, an inner ring wall of the sleeve is fixedly connected to the lower part of the outer wall of the main shaft, a circular hole is provided in the middle of the mounting frame, the inner wall of the circular hole is rotatably connected to the outer wall of the main shaft, the anti-jamming mechanism comprises a protective shell, the inner wall of the protective shell is fixedly connected to the outer wall of the mounting frame, a plurality of strip holes are provided on the outer wall at the top of the protective shell, and grass outlets are provided on both sides of the outer wall of the protective shell.

[0008] Preferably, mounting sleeves are fixedly connected to both sides of the outer wall of the sleeve, moving rods are slidably connected inside the two mounting sleeves, blades are fixedly connected to the opposite sides of the two moving rods, the outer wall of the moving rod is fixedly connected to a fixing plate, and the outer walls of the tops of the two fixing plates are fixedly connected to sliding rods.

[0009] Preferably, a T-shaped slot is formed on the outer wall of the bottom of the mounting frame, the outer wall of the T-shaped slot is slidably connected to the outer wall of the slide rod, and the mounting frame is elliptical in shape.

[0010] Preferably, the outer wall of the main shaft is located above the mounting frame and is fixedly connected to bevel gear 1, the outer wall of the top of the protective shell is fixedly connected to the mounting shell, the interior of the mounting shell is rotatably connected to a rotating shaft, the outer wall of one end of the rotating shaft is fixedly connected to bevel gear 2, the outer wall of bevel gear 2 is meshingly connected with the outer wall of bevel gear 1, the outer wall of the rotating shaft is fixedly connected to a transmission wheel, the inner wall of the mounting shell is located on both sides of the rotating shaft and is rotatably connected to a plurality of rotating rods, one end of the outer walls of the plurality of rotating rods is fixedly connected to the transmission wheel, the outer walls of the plurality of transmission wheels are meshingly connected, and the other end of the outer walls of the plurality of rotating rods is fixedly connected to the main gear.

[0011] Preferably, the outer wall of the top of the protective shell is located on both sides of the main shaft and has slots connected to the outer walls on both sides. The insides of the two slots are fixedly connected to a limiting seat, and the outer wall of the top of the limiting seat is rotatably connected to a limiting wheel. The position of the axis of the limiting wheel is fixedly connected to an installation shaft, and the outer wall of one end of the installation shaft is fixedly connected to a sub-gear, and the outer wall of the sub-gear is meshingly connected to the outer wall of the main gear.

[0012] Preferably, the outer wall of the mounting shaft is rotatably connected to a support frame, the outer wall of the other end of the mounting shaft is rotatably connected to a support rod, the outer wall of the bottom of the support rod is fixedly connected to a roller, the outer wall of the bottom of the roller is rotatably connected to a slide groove 1, and the slide groove 1 is opened on the outer wall of the top of the protective shell.

[0013] Preferably, the outer wall of the bottom of the support frame is fixedly connected to a push plate, the outer wall of the bottom of the push plate is fixedly connected to a rubber strip, the outer wall of the top of the push plate is fixedly connected to a T-shaped rod, and the outer wall of the T-shaped rod is slidably connected to the inside of the strip hole.

[0014] Preferably, a second slide groove is provided on the outer walls on opposite sides of the two mounting shells, the interior of the second slide groove is slidably connected to the outer wall of the mounting shaft, a groove is provided below the interior of the second slide groove, a return spring is fixedly connected below the interior of the groove, a plurality of return springs are fixedly connected to the outer walls on the tops of the return springs, a plurality of blocking blocks are provided on the outer walls on the tops of the blocking blocks with limiting grooves, and the plurality of blocking blocks are in movable contact with each other.

[0015] Preferably, the limiting groove has an elastic strip in internal movable contact, the outer walls at both ends of the elastic strip are fixedly connected to the two sides of the second inner wall of the slide groove, the outer wall at the top of the elastic strip is in movable contact with the outer wall of the mounting shaft, the outer wall of the blocking block is slidably connected to the inside of the groove, and the outer wall at the top of the mounting shell is movably connected to a movable cover.

[0016] Compared with the prior art, the present invention has the following beneficial effects: When the push plate is driven by the support frame to move inside the protective shell, the weeds cut by the blade can be pushed out of the protective shell from the grass outlet, thereby preventing the weeds from affecting the rotation efficiency of the blade inside the protective shell. Accordingly, by pushing the weeds out of the protective shell, the blade is less likely to be entangled with the weeds during operation, thereby further improving the working efficiency of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the outer shell structure of the present invention.

[0018] Figure 2 It is a schematic diagram of the bottom structure of the outer shell of the present invention.

[0019] Figure 3 For the present invention Figure 2 Enlarged structural diagram at location A.

[0020] Figure 4 For the present invention Figure 3 Enlarged structural diagram at location B.

[0021] Figure 5 It is a schematic diagram of the top structure of the protective shell of the present invention.

[0022] Figure 6 It is a structural schematic diagram of a helical gear of the present invention.

[0023] Figure 7 For the present invention Figure 6 Enlarged structural diagram at location C.

[0024] Figure 8 It is a schematic diagram of the push plate structure of the present invention.

[0025] Fig. 9 For the present invention Figure 8 Enlarged structural diagram at D.

[0026] Fig.10 It is a schematic diagram of the installation shell structure of the present invention.

[0027] Fig.11 For the present invention Fig.10 Enlarged structural diagram at E.

[0028] In the figure: 1. outer shell; 11. equipment shell; 12. main shaft; 13. mounting sleeve; 14. moving rod; 15. blade; 16. fixing plate; 17. mounting frame; 18. T-shaped slide groove; 19. shaft sleeve; 110. slide rod; 2. protective shell; 21. grass outlet; 3. push plate; 31. rubber strip; 32. T-shaped rod; 33. support frame; 34. limiting wheel; 35. limiting seat; 36. support rod; 37. roller; 38. slide groove 1; 39. slot hole; 4. bevel gear 1; 41. bevel gear 2; 42. rotating shaft; 43. transmission wheel; 44. main gear; 45. sub gear; 46. mounting shaft; 5. mounting shell; 51. slide groove 2; 52. groove; 53. reset spring; 54. blocking block; 55. limiting groove; 56. elastic strip. DETAILED DESCRIPTION

[0029] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] For example, see Figures 1 to 11 The present invention provides a technical solution of an anti-jamming device for a lawn mower, comprising an outer shell 1, an outer wall at the top of the outer shell 1 is fixedly connected to a device shell 11, a motor is arranged inside the device shell 11, a main shaft 12 is fixedly connected to the output end of the motor, a mowing mechanism is arranged on the outer wall of the main shaft 12, an anti-jamming mechanism is arranged above the mowing mechanism, the mowing mechanism comprises a shaft sleeve 19 and a mounting frame 17, the inner ring wall of the shaft sleeve 19 is fixedly connected to the lower part of the outer wall of the main shaft 12, a circular hole is opened in the middle of the mounting frame 17, and the inner wall of the circular hole is connected to the outer wall of the main shaft 12. The outer wall of the main shaft 12 is rotatably connected, and the mounting sleeves 13 are fixedly connected to the two sides of the outer wall of the sleeve 19, and the moving rods 14 are slidably connected inside the two mounting sleeves 13, and the blades 15 are fixedly connected to the opposite sides of the two moving rods 14, and the outer wall of the moving rod 14 is fixedly connected to the fixing plate 16, and the outer wall of the top of the two fixing plates 16 is fixedly connected to the sliding rod 110, and the outer wall of the bottom of the mounting frame 17 is provided with a T-shaped groove 18, and the outer wall of the T-shaped groove 18 is slidably connected to the outer wall of the sliding rod 110, and the shape of the mounting frame 17 is elliptical.

[0031] The rotation of the blade 15 can quickly and effectively cut off the stems of the weeds, thereby removing the weeds on the ground, which helps to improve the appearance of the lawn or garden, making it more tidy and beautiful. At the same time, mowing can also stimulate the tillering and growth of the lawn grass, making it more lush; The blade 15 is moved left and right during operation to change its motion trajectory. The irregular motion trajectory of the blade 15 can reduce the chance of the blade 15 getting stuck during operation, thereby avoiding the blade 15 from getting stuck or jammed due to uneven cutting. The corresponding longitudinally moving blade 15 helps to disperse vibration and impact during the cutting process, and reduces the chance of the blade 15 getting stuck or jammed due to uneven cutting. The irregular motion trajectory of the blade 15 helps to improve cutting efficiency by reducing jams and blockages.

[0032] Embodiment 2. On the basis of embodiment 1, the outer wall of the main shaft 12 is located above the mounting frame 17 and is fixedly connected to the bevel gear 1 4. The outer wall of the top of the protective shell 2 is fixedly connected to the mounting shell 5. The interior of the mounting shell 5 is rotatably connected to the rotating shaft 42. The outer wall of one end of the rotating shaft 42 is fixedly connected to the bevel gear 2 41. The outer wall of the bevel gear 2 41 is meshingly connected to the outer wall of the bevel gear 1 4. The outer wall of the rotating shaft 42 is fixedly connected to the transmission wheel 43. The inner wall of the mounting shell 5 is located on both sides of the rotating shaft 42 and is rotatably connected to multiple rotating rods. One end of the outer wall of the multiple rotating rods is fixedly connected to the transmission wheel 43. The outer walls of the multiple transmission wheels 43 are meshingly connected, and the other end of the outer wall of the multiple rotating rods is fixedly connected to the main gear 44.

[0033] Through the cooperation between the secondary gear 45 and the main gear 44, the secondary gear 45 can be transmitted, so that the secondary gear 45 can move forward and backward inside the mounting shell 5, avoiding the need for the weeder to start the anti-jamming mechanism separately when starting the anti-jamming mechanism, and correspondingly improving the efficiency of starting the anti-jamming mechanism, thereby reducing the operating steps of the weeder, allowing the weeder to focus more on the mowing task itself without being distracted by operating the anti-jamming mechanism, thereby improving work efficiency and safety.

[0034] Embodiment 3, on the basis of embodiment 2, the outer wall of the top of the protective shell 2 is located on both sides of the main shaft 12 and is provided with slots 39 connected to the outer walls on both sides, the interior of the two slots 39 is fixedly connected to the limit seat 35, the outer wall of the top of the limit seat 35 is rotatably connected to the limit wheel 34, the position of the axis of the limit wheel 34 is fixedly connected to the installation shaft 46, the outer wall of one end of the installation shaft 46 is fixedly connected to the sub-gear 45, the outer wall of the sub-gear 45 is meshed with the outer wall of the main gear 44, and the outer wall of the installation shaft 46 is rotatably connected to the limit wheel 34. A support frame 33 is connected, and the outer wall of the other end of the mounting shaft 46 is rotatably connected to a support rod 36, and the outer wall at the bottom of the support rod 36 is fixedly connected to a roller 37, and the outer wall at the bottom of the roller 37 is rotatably connected to a slide groove 38, and the slide groove 38 is opened on the outer wall at the top of the protective shell 2, and the outer wall at the bottom of the support frame 33 is fixedly connected to a push plate 3, and the outer wall at the bottom of the push plate 3 is fixedly connected to a rubber strip 31, and the outer wall at the top of the push plate 3 is fixedly connected to a T-shaped rod 32, and the outer wall of the T-shaped rod 32 is slidably connected to the inside of the strip hole.

[0035] When the push plate 3 is driven by the support frame 33 to move inside the protective shell 2, the weeds cut by the blade 15 can be pushed out of the protective shell 2 from the grass outlet 21, thereby preventing the weeds from affecting the rotation efficiency of the blade 15 inside the protective shell 2. Accordingly, by pushing the weeds out of the protective shell 2, the blade 15 is less likely to entangle the weeds during operation, thereby further improving the working efficiency of the blade 15. By means of the rubber strip 31 arranged at the bottom of the push plate 3, when the blade 15 passes through the bottom of the rubber strip 31, the rubber strip 31 can clean the surface of the blade 15, thereby preventing weed debris from adhering to the surface of the blade 15. Accordingly, by means of the cleaning effect of the rubber strip 31, the debris adhering to the surface of the blade 15 is removed in time, the surface of the blade 15 is kept clean, and jamming or shutdown caused by weed debris adhering to the surface of the blade 15 is prevented, thereby reducing the maintenance time and downtime of the equipment and improving the overall operating efficiency.

[0036] Embodiment 4, on the basis of embodiment 3, a second slide groove 51 is provided on the outer wall on the opposite side of the two mounting shells 5, the interior of the second slide groove 51 is slidably connected to the outer wall of the mounting shaft 46, a groove 52 is provided at the lower part of the interior of the second slide groove 51, a return spring 53 is fixedly connected at the lower part of the interior of the groove 52, a plurality of return springs 53 are fixedly connected to the outer wall of the top of the outer wall with a blocking block 54, a plurality of blocking blocks 54 are movably contacted with each other on the outer wall with a limiting groove 55, a plurality of blocking blocks 54 are movably contacted with each other, an elastic strip 56 is movably contacted inside the limiting groove 55, the outer walls at both ends of the elastic strip 56 are fixedly connected to the two sides of the inner wall of the second slide groove 51, the outer wall at the top of the elastic strip 56 is movably contacted with the outer wall of the mounting shaft 46, the outer wall of the blocking block 54 is slidably connected to the interior of the groove 52, and the outer wall at the top of the mounting shell 5 is movably connected with a movable cover.

[0037] By pushing the blocking block 54 to contact the upper part of the second slide groove 51, the position of the second slide groove 51 is blocked, preventing weeds from entering the interior of the installation shell 5 through the second slide groove 51, and correspondingly increasing the sealing performance of the installation shell 5, further preventing weeds from entering the interior of the installation shell 5; By installing the shaft 46 above the elastic strip 56, the elastic strip 56 can be squeezed by the shaft 46, and the elastic strip 56 can drive the blocking block 54 to move downward, so that the blocking block 54 can enter the interior of the groove 52. The setting of the elastic strip 56 increases the efficiency of the shaft 46 in pushing the blocking block 54 downward.

[0038] The working principle and use process of the present invention are as follows: when in use, first, the weeding personnel places the lawn mower in the area where mowing is required, and then the weeding personnel activates the motor inside the device shell 11 by operating the starting device on the lawn mower. This starting process ensures that the motor can receive a stable power supply from the power supply and is ready to enter the working state, and then the mowing mechanism starts working through the movement of the motor. At the same time, the weeding personnel controls the movement of the entire device by holding and pushing the handle on the lawn mower. The weeding personnel adjusts the pushing force and direction as needed so that the lawn mower can evenly cover the entire mowing area and achieve the desired weeding effect.

[0039] Then, through the movement of the motor, the main shaft 12 can drive the shaft sleeve 19 to rotate, and through the rotation of the shaft sleeve 19, the two mounting sleeves 13 are driven to move simultaneously, and then the rotation of the mounting sleeve 13 can make the moving rod 14 drive the blade 15 to work, and then through the rotation of the blade 15, the stems of the weeds can be cut off quickly and effectively, thereby removing the weeds on the ground, which helps to improve the appearance of the lawn or garden, making it more tidy and beautiful. At the same time, mowing the lawn can also stimulate the tillering and growth of the lawn grass, making it more lush.

[0040] When the shaft sleeve 19 drives the blade 15 to rotate with the main shaft 12 as the axis, since the shape of the mounting frame 17 is elliptical and the rotation connection between the mounting frame 17 and the main shaft 12 can be used, the mounting frame 17 can remain stationary when the main shaft 12 drives the shaft sleeve 19 to rotate. At this time, when the moving rod 14 drives the fixed plate 16 to rotate with the main shaft 12 as the axis, the fixed plate 16 can drive the sliding rod 110 to move inside the T-shaped slide groove 18, and then through the fixed connection between the fixed plate 16 and the moving rod 14, when the sliding rod 110 moves along the trajectory of the T-shaped slide groove 18, the fixed plate 16 drives the moving rod 14 to shorten or stretch inside the mounting sleeve 13, so that the blade 15 moves left and right during operation to change the movement trajectory of the blade 15. The irregular movement trajectory of the blade 15 reduces the possibility of the blade 15 getting stuck during operation, and avoids the blade 15 getting stuck or jammed due to uneven cutting during operation. The corresponding longitudinally moving blade 15 helps to disperse the vibration and impact during the cutting process, and reduces the jamming or jamming due to uneven cutting. The irregular movement trajectory of the blade 15 helps to improve the cutting efficiency by reducing jamming and blockage.

[0041] When the main shaft 12 rotates, the bevel gear 1 4 can be moved accordingly, and then the rotation of the bevel gear 1 4 can drive the two bevel gears 2 41 to rotate at the same time, and then the rotation of the bevel gear 2 41 can make the rotating shaft 42 drive the transmission wheel 43 and the main gear 44 to rotate at the same time, and then through the meshing connection between the multiple transmission wheels 43, when the rotating shaft 42 drives one of the transmission wheels 43 to rotate, the other transmission wheels 43 can be rotated accordingly, and then the rotation of the transmission wheel 43 can drive the rotating rod to drive the main gear 44 to rotate accordingly, and then through the rotation of the main gear 44, the sub-gear 45 can be driven to move accordingly, and then Through the movement of the secondary gear 45, the mounting shaft 46 can drive the anti-jamming mechanism to move. Through the cooperation of the bevel gear 2 41 and the bevel gear 1 4, the anti-jamming mechanism can be started when the main shaft 12 is working. Through the cooperation between the secondary gear 45 and the main gear 44, the secondary gear 45 can be transmitted, so that the secondary gear 45 moves back and forth inside the mounting shell 5, avoiding the need for the weeder to start the anti-jamming mechanism separately when starting it, and correspondingly improving the efficiency of starting the anti-jamming mechanism, thereby reducing the operating steps of the weeder, allowing the weeder to focus more on the mowing task itself without being distracted by operating the anti-jamming mechanism, thereby improving work efficiency and safety.

[0042] By rotating the mounting shaft 46, the limiting wheel 34 can be driven to move on the limiting seat 35, so that when the limiting wheel 34 contacts the teeth of the limiting seat 35, the limiting wheel 34 can drive the support frame 33 to move forward and backward on the limiting seat 35, and then through the forward and backward movement of the sub-gear 45 and the limiting wheel 34, the mounting shaft 46 can drive the support rod 36 to move accordingly, so that the support rod 36 drives the roller 37 to move inside the slide groove 1 38, and then through the cooperation of the roller 37 and the roller 37, while increasing the support stability of the support frame 33, the friction between the support rod 36 and the slide groove 1 38 can be reduced through the rotation of the roller 37, thereby correspondingly improving the efficiency of the movement of the support rod 36 inside the slide groove 1 38.

[0043] When the push plate 3 is driven by the support frame 33 to move inside the protective shell 2, the weeds cut by the blade 15 can be pushed out of the protective shell 2 from the grass outlet 21, thereby preventing the weeds inside the protective shell 2 from affecting the rotation efficiency of the blade 15. Accordingly, by pushing the weeds out of the protective shell 2, the blade 15 is less likely to entangle with the weeds during operation, thereby further improving the working efficiency of the blade 15.

[0044] By means of the rubber strip 31 arranged at the bottom of the push plate 3, when the blade 15 passes through the bottom of the rubber strip 31, the rubber strip 31 can clean the surface of the blade 15, thereby preventing weed debris from adhering to the surface of the blade 15. Accordingly, by means of the cleaning effect of the rubber strip 31, the debris adhering to the surface of the blade 15 is removed in time, the surface of the blade 15 is kept clean, and jamming or shutdown caused by weed debris adhering to the surface of the blade 15 is prevented, thereby reducing the maintenance time and downtime of the equipment and improving the overall operating efficiency.

[0045] By setting the mounting shell 5 and the movable cover, the main gear 44 and the transmission wheel 43 can be protected inside the mounting shell 5, preventing weeds from entering the mounting shell 5 when the blade 15 is working and affecting the transmission mechanism, thereby correspondingly increasing the stability of the transmission mechanism.

[0046] When the mounting shaft 46 moves inside the second slide groove 51, the mounting shaft 46 can squeeze the blocking block 54, so that the blocking block 54 squeezes the return spring 53 into the interior of the groove 52, and the blocking block 54 that is not squeezed by the mounting shaft 46 can, under the action of the return spring 53, push the blocking block 54 to contact the upper part of the second slide groove 51, thereby blocking the position of the second slide groove 51, preventing weeds from entering the interior of the mounting shell 5 through the second slide groove 51, correspondingly increasing the sealing performance of the mounting shell 5, and further preventing weeds from entering the interior of the mounting shell 5.

[0047] By installing the shaft 46 above the elastic strip 56, the elastic strip 56 can be squeezed by the installing shaft 46, and the elastic strip 56 can drive the blocking block 54 to move downward, so that the blocking block 54 can enter the interior of the groove 52. Through the setting of the elastic strip 56, the efficiency of the installing shaft 46 in pushing the blocking block 54 downward is correspondingly increased.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-jamming device for a lawn mower, comprising an outer shell (1), characterized in that: The outer wall at the top of the outer shell (1) is fixedly connected to a device shell (11), a motor is arranged inside the device shell (11), an output end of the motor is fixedly connected to a main shaft (12), a mowing mechanism is arranged on the outer wall of the main shaft (12), and an anti-jamming mechanism is arranged above the mowing mechanism; The mowing mechanism comprises a shaft sleeve (19) and a mounting frame (17), wherein the inner ring wall of the shaft sleeve (19) is fixedly connected to the lower part of the outer wall of the main shaft (12), and a circular hole is opened in the middle of the mounting frame (17), and the inner wall of the circular hole is rotatably connected to the outer wall of the main shaft (12); The anti-jamming mechanism comprises a protective shell (2), the inner wall of the protective shell (2) being fixedly connected to the outer wall of the mounting frame (17), the outer wall at the top of the protective shell (2) being provided with a plurality of strip holes, and grass outlets (21) being provided on both sides of the outer wall of the protective shell (2).

2. The anti-jamming device for a lawn mower according to claim 1, characterized in that: The two sides of the outer wall of the shaft sleeve (19) are fixedly connected to mounting sleeves (13), the interiors of the two mounting sleeves (13) are slidably connected to moving rods (14), the opposite sides of the two moving rods (14) are fixedly connected to blades (15), the outer wall of the moving rod (14) is fixedly connected to a fixing plate (16), and the outer walls of the tops of the two fixing plates (16) are fixedly connected to sliding rods (110).

3. The anti-jamming device for a lawn mower according to claim 1, characterized in that: The outer wall of the bottom of the mounting frame (17) is provided with a T-shaped sliding groove (18), the outer wall of the T-shaped sliding groove (18) is slidably connected to the outer wall of the sliding rod (110), and the shape of the mounting frame (17) is elliptical.

4. The anti-jamming device for a lawn mower according to claim 1, characterized in that: The outer wall of the main shaft (12) is located above the mounting frame (17) and is fixedly connected to a bevel gear 1 (4); the outer wall of the top of the protective shell (2) is fixedly connected to a mounting shell (5); the interior of the mounting shell (5) is rotatably connected to a rotating shaft (42); the outer wall of one end of the rotating shaft (42) is fixedly connected to a bevel gear 2 (41); the outer wall of the bevel gear 2 (41) is meshingly connected to the outer wall of the bevel gear 1 (4); the outer wall of the rotating shaft (42) is fixedly connected to a transmission wheel (43); the inner wall of the mounting shell (5) is located on both sides of the rotating shaft (42) and is rotatably connected to a plurality of rotating rods; one end of the outer walls of the plurality of rotating rods is fixedly connected to a transmission wheel (43); the outer walls of the plurality of transmission wheels (43) are meshingly connected to each other; and the other end of the outer walls of the plurality of rotating rods is fixedly connected to a main gear (44).

5. The anti-jamming device for a lawn mower according to claim 1, characterized in that: The outer wall of the top of the protective shell (2) is located on both sides of the main shaft (12) and is provided with slots (39) whose outer walls are connected to each other. The insides of the two slots (39) are fixedly connected to the limit seat (35). The outer wall of the top of the limit seat (35) is rotatably connected to the limit wheel (34). The axis of the limit wheel (34) is fixedly connected to a mounting shaft (46). The outer wall of one end of the mounting shaft (46) is fixedly connected to a sub-gear (45). The outer wall of the sub-gear (45) is meshingly connected to the outer wall of the main gear (44).

6. The anti-jamming device for a lawn mower according to claim 5, characterized in that: The outer wall of the mounting shaft (46) is rotatably connected to the support frame (33), the outer wall of the other end of the mounting shaft (46) is rotatably connected to the support rod (36), the outer wall at the bottom of the support rod (36) is fixedly connected to a roller (37), the outer wall at the bottom of the roller (37) is rotatably connected to a slide groove (38), and the slide groove (38) is opened on the outer wall at the top of the protective shell (2).

7. The anti-jamming device for a lawn mower according to claim 6, characterized in that: The outer wall at the bottom of the support frame (33) is fixedly connected to a push plate (3), the outer wall at the bottom of the push plate (3) is fixedly connected to a rubber strip (31), the outer wall at the top of the push plate (3) is fixedly connected to a T-shaped rod (32), and the outer wall of the T-shaped rod (32) is slidably connected to the inside of the strip-shaped hole.

8. The anti-jamming device for a lawn mower according to claim 4, characterized in that: A second slide groove (51) is provided on the outer wall of the two mounting shells (5) on the opposite side, the interior of the second slide groove (51) is slidably connected to the outer wall of the mounting shaft (46), a groove (52) is provided below the interior of the second slide groove (51), a return spring (53) is fixedly connected below the interior of the groove (52), a plurality of the return springs (53) are fixedly connected to the outer wall at the top thereof with a blocking block (54), a plurality of the blocking blocks (54) are provided on the outer wall at the top thereof with a limiting groove (55), and the plurality of the blocking blocks (54) are in movable contact with each other.

9. The anti-jamming device for a lawn mower according to claim 8, characterized in that: The limiting groove (55) is movably connected to an elastic strip (56) inside, the outer walls at both ends of the elastic strip (56) are fixedly connected to the two sides of the inner wall of the second slide groove (51), the outer wall at the top of the elastic strip (56) is movably connected to the outer wall of the installation shaft (46), the outer wall of the blocking block (54) is slidably connected to the inside of the groove (52), and the outer wall at the top of the installation shell (5) is movably connected to a movable cover.

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