Liftable mower

Abstract

The utility model relates to the technical field of hay mowers, in particular to a liftable hay mower which comprises a walking trolley and an adjusting box, the adjusting box is arranged on the outer wall of the top end of a bottom plate of the walking trolley, a driving control mechanism is arranged on the side edge of the adjusting box, a lifting control mechanism is arranged on the side edge of the driving control mechanism, and the lifting control mechanism is arranged on the side edge of the lifting control mechanism. When the lifting type mower is used, the rotating speed of a limiting shaft in the driving control mechanism is indirectly monitored through meshing transmission of a driving gear and a driven gear, and once the rotating speed of a positioning shaft exceeds the monitoring interval of a rotating speed monitoring sensor, the rotating speed monitoring sensor is started to monitor the rotating speed of the limiting shaft. At the moment, it is indicated that the cutting cutterhead abuts against the stone, then the device can automatically control the motor to stop mowing work, through the design, the device can achieve the emergency stopping effect, the safety protection effect on the machine is achieved, then it is guaranteed that follow-up mowing work is conducted stably, and the overall safety and practicability are good.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mowers, in particular to a liftable lawn mower. Background Art

[0002] A lawn mower is a device used to mow the lawn, usually consisting of a rotating blade or blades, which is mechanically or electrically driven to cut and trim the grass on the lawn to keep it neat and tidy. Lawn mowers are usually used in home lawns, gardens, parks, golf courses and other places. There are different types of lawn mowers such as hand-push, electric and fuel-driven, suitable for lawns of different sizes and types;

[0003] Patent No. "CN110366931B" discloses a "liftable lawn mower". This device improves the obstacle avoidance ability of the entire machine by using crawler wheels as supporting walking parts. The crawler wheels increase the contact area between the lawn mower and the grass, reduce the pressure on the grass, and reduce the damage to the grass. Since there may be hard objects such as stones in the grass, once the lawn mower cuts a stone during the mowing process, the blade may be broken at best, and the lawn mower body may be directly damaged and cannot operate normally at worst. However, the above device has not made improvements to this problem, and the overall practical effect is poor. Utility Model Content

[0004] The utility model aims to solve the above-mentioned problem and proposes a liftable lawn mower, which improves the existing liftable lawn mower. When cutting stones during mowing, the blade may be broken at best, and the lawn mower body may be directly damaged so that it cannot operate normally. However, the existing device has not made improvements to this problem, and the overall practical effect is poor.

[0005] A liftable lawn mower comprises a walking trolley and an adjustment box: the walking trolley is provided with an adjustment box on the top outer wall of a bottom plate, a driving control mechanism is provided on the side of the adjustment box, a lifting control mechanism is provided on the side of the driving control mechanism, a safety protection mechanism is provided on the side of the lifting control mechanism, the driving control mechanism comprises a protective cover, a limit support plate, a variable speed motor, a limit shaft and a cutting disc, a protective cover is provided on the side outer wall of the adjustment box, the limit support plate is located inside the protective cover, a variable speed motor is provided on the top outer wall of the limit support plate, the variable speed motor is connected to the top outer wall of the limit shaft, and the bottom outer wall of the limit shaft is connected to the top outer wall of the cutting disc.

[0006] Preferably, the lifting control mechanism includes a driving motor, an auxiliary support shaft and a reciprocating screw. The top outer wall of the adjusting box is provided with a driving motor, the driving motor is connected to the top outer wall of the auxiliary support shaft, and the bottom outer wall of the auxiliary support shaft is connected to the top outer wall of the reciprocating screw.

[0007] Preferably, the outer wall of the bottom end of the reciprocating screw rod is rotatably mounted on the inner wall of the bottom end of the regulating box, and auxiliary strips are arranged parallel to the sides of the reciprocating screw rod.

[0008] Preferably, both ends of the auxiliary strip are connected to the inner wall of the adjustment box, and limit blocks are arranged outside the reciprocating screw rod and the auxiliary strip.

[0009] Preferably, both ends of the limit block are slidably connected to the side inner wall of the adjustment box, the side outer wall of the limit block is provided with a protrusion, and the protrusion is connected to the side outer wall of the limit support plate.

[0010] Preferably, the safety protection mechanism includes an isolation cover, a driving gear and a driven gear, the bottom outer wall of the limiting support plate is provided with an isolation cover, the outside of the limiting shaft is provided with a driving gear, and the side of the driving gear is meshed with a driven gear.

[0011] Preferably, the driving gear and the driven gear are both rotatably mounted on the bottom outer wall of the limiting support plate, the bottom outer wall of the driven gear is connected to one end of the positioning shaft, one end of the positioning shaft is connected to the speed monitoring sensor, and the speed monitoring sensor is connected to the bottom inner wall of the isolation cover.

[0012] The beneficial effects of the utility model are:

[0013] 1. When the liftable lawn mower is in use, the limit shaft directly reflects the rotation speed of the cutting disc. Once the cutting disc collides with a stone during the cutting process, the rotation speed of the cutting disc is correspondingly slowed down by the collision. Then, through the setting of the driving gear, the driven gear, the positioning shaft and the rotation speed monitoring sensor, the rotation speed of the limit shaft in the driving control mechanism is indirectly monitored by the meshing transmission of the driving gear and the driven gear. Once the rotation speed of the positioning shaft exceeds the monitoring range of the rotation speed monitoring sensor, it indicates that the cutting disc collides with a stone, and then the device automatically controls the motor to stop mowing. Through the above design, the device can achieve the effect of emergency stop, thereby realizing the effect of safety protection for the machine, thereby ensuring the stability of subsequent mowing work, and the overall safety and practicality are good;

[0014] 2. When the liftable lawn mower is in use, the device can adjust the cutting height of the device according to the required mowing depth by the setting of the drive motor, the auxiliary support shaft, the reciprocating screw, the auxiliary strip and the limit block, and the reciprocating screw is rotated to drive the limit block to move in a reciprocating trajectory, so that the device has high overall flexibility and can be adjusted according to the mowing depth requirements of different sites, and the overall practicality is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the overall sectional three-dimensional structure of the utility model;

[0017] Figure 3 It is a three-dimensional structural diagram of the lifting control mechanism of the utility model;

[0018] Figure 4 It is a three-dimensional structural schematic diagram of the safety protection mechanism of the utility model.

[0019] In the figure: 1. Traveling trolley; 2. Adjustment box; 3. Drive control mechanism; 31. Protective cover; 32. Limit support plate; 33. Variable speed motor; 34. Limit shaft; 35. Cutting disc; 4. Lifting control mechanism; 41. Drive motor; 42. Auxiliary support shaft; 43. Reciprocating screw rod; 44. Auxiliary bar; 45. Limit block; 5. Safety protection mechanism; 51. Isolation cover; 52. Drive gear; 53. Driven gear; 54. Positioning shaft; 55. Speed ​​monitoring sensor. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] When implementing: Figure 1-4 As shown, a liftable lawn mower comprises a walking trolley 1 and an adjustment box 2: the walking trolley 1 is provided with an adjustment box 2 on the top outer wall of the bottom plate, a driving control mechanism 3 is provided on the side of the adjustment box 2, a lifting control mechanism 4 is provided on the side of the driving control mechanism 3, a safety protection mechanism 5 is provided on the side of the lifting control mechanism 4, the driving control mechanism 3 comprises a protective cover 31, a limit support plate 32, a variable speed motor 33, a limit shaft 34 and a cutting blade 35, a side outer wall of the adjustment box 2 is provided with a protective cover 31, a limit support plate 32, a variable speed motor 33, a limit shaft 34 and a cutting blade 35, The support plate 32 is located inside the protective cover 31, and a variable speed motor 33 is provided on the top outer wall of the limit support plate 32. The variable speed motor 33 is connected to the top outer wall of the limit shaft 34, and the bottom outer wall of the limit shaft 34 is connected to the top outer wall of the cutting disc 35. When the device needs to be started for mowing, the variable speed motor 33 needs to be turned on first. When the variable speed motor 33 is turned on, it will automatically drive the limit shaft 34 to rotate and then drive the cutting disc 35 to rotate. Then, as the cutting disc 35 rotates, mowing will be automatically performed.

[0022] The lifting control mechanism 4 includes a driving motor 41, an auxiliary support shaft 42 and a reciprocating screw rod 43. The top outer wall of the adjusting box 2 is provided with a driving motor 41, and the driving motor 41 is connected to the top outer wall of the auxiliary support shaft 42. The bottom outer wall of the auxiliary support shaft 42 is connected to the top outer wall of the reciprocating screw rod 43. The bottom outer wall of the reciprocating screw rod 43 is rotatably installed with the bottom inner wall of the adjusting box 2. An auxiliary bar 44 is arranged parallel to the side of the reciprocating screw rod 43. Both ends of the auxiliary bar 44 are connected to the inner wall of the adjusting box 2. Limiting blocks 45 are arranged outside the reciprocating screw rod 43 and the auxiliary bar 44. Both ends of the limiting blocks 45 are slidably connected to the side inner wall of the adjusting box 2. The side outer wall of the limiting block 45 is provided with a protrusion, and the protrusion is connected to the side outer wall of the limiting support plate 32. When it is necessary to control the overall height of the driving control mechanism 3 in order to adjust the mowing height, At this time, you first need to turn on the drive motor 41. When the drive motor 41 is turned on, it will automatically drive the auxiliary support shaft 42 to rotate and then drive the reciprocating screw 43 to rotate. Then, the rotation of the reciprocating screw 43 will automatically drive the limit block 45 to move. Here, due to the setting of the auxiliary bar 44, the reciprocating screw 43 will only drive the limit block 45 to realize the sliding trajectory movement in the vertical direction when it rotates. Then, the movement of the limit block 45 will automatically drive the protrusion to move and then drive the limit support plate 32 to move. Then, the movement of the limit support plate 32 will automatically drive the drive control mechanism 3 to lift the height. When the limit support plate 32 moves, it will automatically drive the cutting disc 35 to move. Then, after the cutting disc 35 moves to the appropriate position, you can turn off the drive motor 41. It is noted here that the drive motor 41 has a self-locking function. After being turned off, the cutting disc 35 can still maintain its position unchanged after moving.

[0023] The safety protection mechanism 5 includes an isolation cover 51, a driving gear 52 and a driven gear 53. The bottom outer wall of the limiting support plate 32 is provided with an isolation cover 51, the outside of the limiting shaft 34 is provided with a driving gear 52, and the side of the driving gear 52 is meshed with a driven gear 53. The driving gear 52 and the driven gear 53 are both rotatably installed with the bottom outer wall of the limiting support plate 32. The bottom outer wall of the driven gear 53 is connected to one end of the positioning shaft 54, and one end of the positioning shaft 54 ​​is connected to a speed monitoring sensor 55. The speed monitoring sensor 55 is connected to the isolation cover 51. The bottom inner wall is connected; when the above-mentioned limit shaft 34 rotates, it will also synchronously drive the driving gear 52 to rotate and then drive the driven gear 53 to rotate. Then the rotation of the driven gear 53 will automatically drive the positioning shaft 54 ​​to rotate. The setting of the speed monitoring sensor 55 here is convenient for real-time monitoring of the speed of the positioning shaft 54. Once the speed of the positioning shaft 54 ​​exceeds the monitoring range of the speed monitoring sensor 55, the speed monitoring sensor 55 will automatically control the speed change motor 33 to stop working, thereby achieving an emergency stop effect, thereby achieving a safety protection effect.

[0024] When the utility model is in use, when it is necessary to control the overall height of the drive control mechanism 3 in order to adjust the mowing height, it is necessary to first turn on the drive motor 41. When the drive motor 41 is turned on, it will automatically drive the auxiliary support shaft 42 to rotate and then drive the reciprocating screw rod 43 to rotate. Then the rotation of the reciprocating screw rod 43 will automatically drive the limit block 45 to move. Here, due to the setting of the auxiliary bar 44, the reciprocating screw rod 43 will only drive the limit block 45 to realize the sliding trajectory movement in the vertical direction when rotating. Then the movement of the limit block 45 will automatically drive the convex block to move and then drive the limit support plate 32 to move. Then the movement of the limit support plate 32 will automatically drive the drive control mechanism 3 to lift the height. When the limit support plate 32 moves, it will automatically drive the cutting disc 35 to move. Then, after the cutting disc 35 moves to a suitable position, the drive motor 41 can be turned off. It is noted here that the drive motor 41 has It has a self-locking function, and the cutting disc 35 can still maintain the unchanged position after being moved after being closed; when it is necessary to start the device to mow the grass, it is necessary to first turn on the variable speed motor 33. When the variable speed motor 33 is turned on, it will automatically drive the limit shaft 34 to rotate and then drive the cutting disc 35 to rotate, and then the cutting disc 35 will automatically mow the grass as it rotates; when the above-mentioned limit shaft 34 rotates, it will also synchronously drive the driving gear 52 to rotate and then drive the driven gear 53 to rotate, and then the rotation of the driven gear 53 will automatically drive the positioning shaft 54 ​​to rotate. The setting of the speed monitoring sensor 55 here is convenient for real-time monitoring of the speed of the positioning shaft 54. Once the speed of the positioning shaft 54 ​​exceeds the monitoring range of the speed monitoring sensor 55, the speed monitoring sensor 55 will automatically control the variable speed motor 33 to stop working, thereby achieving the effect of emergency stop, thereby achieving the effect of safety protection.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A liftable lawn mower, characterized in that: The invention comprises a walking trolley (1) and an adjusting box (2): the walking trolley (1) is provided with an adjusting box (2) on the top outer wall of a bottom plate; a driving control mechanism (3) is provided on the side of the adjusting box (2); a lifting control mechanism (4) is provided on the side of the driving control mechanism (3); a safety protection mechanism (5) is provided on the side of the lifting control mechanism (4); the driving control mechanism (3) comprises a protective cover (31), a limit support plate (32), a speed change electric The regulating box (2) comprises a regulating box (33), a limiting shaft (34) and a cutting blade (35), the side outer wall of the regulating box (2) is provided with a protective cover (31), the limiting support plate (32) is located inside the protective cover (31), the top outer wall of the limiting support plate (32) is provided with a variable speed motor (33), the variable speed motor (33) is connected to the top outer wall of the limiting shaft (34), and the bottom outer wall of the limiting shaft (34) is connected to the top outer wall of the cutting blade (35).

2. A liftable lawn mower according to claim 1, characterized in that: The lifting control mechanism (4) comprises a driving motor (41), an auxiliary support shaft (42) and a reciprocating screw (43); the top outer wall of the regulating box (2) is provided with a driving motor (41); the driving motor (41) is connected to the top outer wall of the auxiliary support shaft (42); the bottom outer wall of the auxiliary support shaft (42) is connected to the top outer wall of the reciprocating screw (43).

3. A liftable lawn mower according to claim 2, characterized in that: The outer wall of the bottom end of the reciprocating screw rod (43) is rotatably mounted on the inner wall of the bottom end of the regulating box (2), and an auxiliary strip (44) is arranged parallel to the side of the reciprocating screw rod (43).

4. A liftable lawn mower according to claim 3, characterized in that: Both ends of the auxiliary strip (44) are connected to the inner wall of the regulating box (2), and limiting blocks (45) are arranged outside the reciprocating screw rod (43) and the auxiliary strip (44).

5. A liftable lawn mower according to claim 4, characterized in that: Both ends of the limit block (45) are slidably connected to the inner side wall of the regulating box (2); the outer side wall of the limit block (45) is provided with a protrusion, and the protrusion is connected to the outer side wall of the limit support plate (32).

6. The liftable lawn mower according to claim 1, characterized in that: The safety protection mechanism (5) comprises an isolating cover (51), a driving gear (52) and a driven gear (53); the bottom outer wall of the limiting support plate (32) is provided with an isolating cover (51); the outside of the limiting shaft (34) is provided with a driving gear (52); and the side edge of the driving gear (52) is meshedly mounted with a driven gear (53).

7. A liftable lawn mower according to claim 6, characterized in that: The driving gear (52) and the driven gear (53) are both rotatably mounted on the bottom outer wall of the limiting support plate (32); the bottom outer wall of the driven gear (53) is connected to one end of a positioning shaft (54); one end of the positioning shaft (54) is connected to a rotation speed monitoring sensor (55); and the rotation speed monitoring sensor (55) is connected to the bottom inner wall of the isolation cover (51).

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