Garden mower with height adjusting device

Abstract

The invention discloses a garden mower with a height adjusting device, and relates to the technical field of mowers, the garden mower comprises an operating rod and a mowing head, and nylon ropes extend from both sides of the mowing head; the height adjusting assembly is arranged at one end of the operating rod, and the height adjusting assembly comprises an adjusting part and a self-adjusting part. The working area is in a wide wave shape, when the nylon rope moves to the concave position and the convex position, a part of the nylon rope can be folded upwards or downwards through a self-adjusting piece in the height adjusting assembly, the nylon rope can automatically adapt to the terrain, and the height of the nylon rope can be adjusted through upward folding and downward folding guiding. The effective working length of the nylon rope is kept relatively constant when the nylon rope is concave and convex, so that the problem of cutting missing or inconsistent mowing height is avoided, the lawn is more uniform after being trimmed and can automatically adapt to the terrain, the nylon rope is allowed to float within a certain range, and the operation difficulty and fatigue feeling are greatly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the lawn mower technical field, specifically to a garden lawn mower with height adjusting device. BACKGROUND

[0002] Garden is a beautiful artificial natural environment created by humans for sightseeing, resting or improving the environment through art and technical means in a certain area, using and modifying natural landscape, terrain, or artificially opening up, constructing, and planting flowers, trees, and arranging garden roads, building buildings, etc. In short, it is a carefully designed and maintained natural art space. Large to national parks, city parks, botanical gardens, scenic spots; small to residential courtyards, villa gardens, community green spaces, and unit lawns all belong to the category of gardens. In order to maintain the design aesthetics and landscape effect, the lawn in the garden needs to be regularly cut by a lawn mower to keep the lawn beautiful. Garden lawn mower is a general term for a class of mechanical tools designed specifically for the trimming and maintenance of lawns and ground cover plants in garden green spaces. Main types include drum / rotary knife seat / hand-push trimmer, grass trimmer / bush trimmer, lawn mower, and hedge trimmer.

[0003] The patent document with the publication number CN212573553U discloses a hand-push grass trimmer with adjustable grass cutting height, which relates to a grass trimmer device. It includes a bottom plate, two fixed plates fixedly installed on the bottom side of the bottom plate, the positions of the two fixed plates are symmetrical based on the geometric center of the bottom plate, an arc-shaped hole is formed on one side of each fixed plate, a bearing is fixedly installed on the inner wall of each arc-shaped hole, a same rotating shaft is rotatably sleeved in the two bearings, and a wheel is rotatably installed on the two ends of the rotating shaft. The utility model has the advantages of reasonable structure. When the grass cutting height needs to be adjusted, the limit pin is removed, the handle is rotated, the rotating shaft drives the gear to rotate, the rack is moved, the device height is adjusted, the limit pin is inserted into one of the limit holes and the positioning hole after the height is adjusted to the required height, the device structure is simple and easy to operate, different grass cutting heights can be adjusted according to needs, and the device has more functions, so it is more likely to be favored by the market.

[0004] The above-mentioned grass trimmer can be normally used on lawns with flat platforms or slight slope changes. However, if it encounters a wave-shaped lawn, the nylon rope cannot adapt to the terrain in the uneven area. When the nylon rope moves to the concave part, the grass on the lawn will be trimmed too much due to the terrain. SUMMARY

[0005] The present application aims to provide a garden lawn mower with height adjusting device, which solves the problem that the traditional garden lawn mower with height adjusting device cannot adapt to the terrain in the uneven area when encountering a wave-shaped lawn.

[0006] The application is to solve the above technical problems by the following technical scheme, the application is a garden mower with height adjustment device, comprising: The operating rod and the grass head, nylon ropes are extended on both sides of the grass head; The height adjustment assembly is arranged at one end of the operating rod, the height adjustment assembly comprises an adjusting part and a self-adjusting part, the adjusting part comprises a self-restoring part arranged at one end of the operating rod and a lifting part arranged below the self-restoring part, the self-adjusting part comprises two double mounting racks and a range reducing part, ground engaging parts are arranged on the inner sides of the two double mounting racks, the ground engaging parts are connected with the range reducing part, and the ground engaging parts are used to control the range reducing part to reduce the grass cutting range of the nylon ropes.

[0007] Preferably, the ground engaging part comprises a fixed rod fixed to the inner side of the double mounting rack, two sliding seats are slidably arranged on the outer side of the fixed rod, hinged rods are hinged below the two sliding seats, first air cylinders are arranged between one end of the two hinged rods through the mounting shell, and an earth engaging part is fixed to one end of the first air cylinder.

[0008] Preferably, a flexible bellows is sleeved on the outer side of the fixed rod, one end of the two hinged rods extends to the outside of the flexible bellows, and the other end of the hinged rod is connected through a protective cloth bag and the flexible bellows.

[0009] Preferably, the range reducing part comprises a U-shaped limiting rack fixed below the lifting part, a lifting shell, and two position driving parts arranged on the U-shaped limiting rack, a motor is fixed to the bottom of the U-shaped limiting rack, the top of the grass head and one end of the motor output shaft are fixedly connected, two through grooves are formed in the two sides of the lifting shell, the U-shaped limiting rack is arranged between the two through grooves, a double-layer ring plate is fixed to the bottom of the U-shaped limiting rack through a connecting arm, a sliding groove is formed in the bottom of the U-shaped limiting rack, two sliding arms are slidably arranged in the inner side of the sliding groove, the two sliding arms are arranged in the inner side of the double-layer ring plate, and folding parts are arranged at one end of the two sliding arms.

[0010] Preferably, the position driving part comprises driving arms fixed to the top of the two sliding seats respectively and an inverted trapezoidal plate fixed to the lifting shell, inclined rods are fixed to the two sides of the inverted trapezoidal plate, and one end of the two driving arms is slidably arranged on the two inclined rods respectively.

[0011] Preferably, the folding part comprises two mounting seats fixed to the outer side wall of the grass head, two rotating rods are rotatably arranged between the two mounting seats, a connecting groove is formed in the top of the upper rotating rod, a moving seat is slidably arranged in the inner side of the connecting groove, and one end of the sliding arm is hinged to the top of the moving seat.

[0012] The self-repairing part preferably comprises a cross-shaped fixing plate fixed to one end of the operating rod, the bottom of the cross-shaped fixing plate is fixed with a spring and a corrugated shielding ring, and the spring is located inside the corrugated shielding ring.

[0013] The lifting part preferably comprises a cross-shaped frame, one end of the spring is fixed to the top of the cross-shaped frame, both sides of the cross-shaped frame are fixed with two hollow support legs, the inside of the hollow support legs is fixed with a second air cylinder, one end of the second air cylinder telescopic rod is fixed with a rolling ball, an arc-shaped shielding plate is fixed on the two hollow support legs located at the same side, and the cross-shaped frame and the cross-shaped fixing plate are connected through a bidirectional hinge joint.

[0014] Compared with the prior art, the present application has the following beneficial effects: In the wide and wavy working area, when the nylon rope moves to the concave part and the convex part, the self-adjusting part in the height adjusting assembly can fold up or down a part of the nylon rope, so that the effective working length of the nylon rope can automatically adapt to the terrain, and through the guidance of folding up and folding down, the effective working length of the nylon rope can remain relatively constant when encountering concave and convex parts, which avoids the problems of uneven cutting or inconsistent cutting height, makes the lawn more uniform after trimming, and allows the nylon rope to automatically adapt to the terrain and float within a certain range, greatly reducing the operation difficulty and fatigue. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The figure is a schematic diagram of the overall structure in the present application; Figure 2 The figure is a partial exploded sectional view of the grounding part in the present application; Figure 3 The figure is a partial sectional view of the range narrowing part in the present application; Figure 4 The figure is an exploded schematic diagram of the grass hitting head and the folding part in the present application; Figure 5 The figure is Figure 4 The figure is an enlarged schematic diagram of part A in the present application; Figure 6 The figure is an exploded sectional view of the adjusting part in the present application.

[0016] 1. Operating lever; 2. Trimming head; 3. Height adjustment component; 31. Double mounting bracket; 32. Fixed rod; 33. Sliding seat; 34. Hinge rod; 35. First cylinder; 36. Ground contact; 37. Flexible corrugated pipe; 38. U-shaped limit bracket; 39. Lifting shell; 310. Through slot; 311. Double-layer ring plate; 312. Slide groove; 313. Sliding arm; 314. Drive arm; 315. Inverted trapezoidal plate; 316. Inclined rod; 317. Mounting seat; 318. Rotating bar; 319. Connecting groove; 320. Moving seat; 321. Cross fixing plate; 322. Spring; 323. Corrugated shielding ring; 324. Cross; 325. Hollow support leg; 326. Second cylinder; 327. Rolling ball; 328. Shielding arc plate; 329. Two-way hinge joint; 4. Nylon rope. Detailed Implementation

[0017] The above-mentioned and other technical features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

[0018] This invention provides a technical solution: a garden lawnmower with a height adjustment device, such as... Figures 1-6 As shown, the device includes an operating lever 1, a trimming head 2, and a height adjustment assembly 3. The operating lever 1 has a handle for controlling its movement, and operating buttons for controlling the trimming and height adjustment of the equipment. Since this is a common practice or common knowledge, it will not be described in detail here. A nylon rope 4 is wound around the inside of the trimming head 2. Both ends of the nylon rope 4 pass through two holes on the trimming head 2 and extend to the outside of the trimming head 2. The extension length is typically between 10 and 15 centimeters. This length range represents the optimal balance between safety, efficiency, and rope life. In specific operation, those skilled in the art can adjust the length according to the model of the trimmer and the type of nylon rope 4. The trimming head 2 is driven by a motor, and the central shaft at the top of the trimming head 2 is fixed to one end of the motor's output shaft, as is well known to those skilled in the art. The working principles and wiring methods of the motor, the first cylinder 35, and the second cylinder 326 mentioned in this application are commonplace and belong to conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience. It should be noted that the first cylinder 35 and the second cylinder 326 work synchronously. The extension rod extends to the same length at the same time. The first cylinder 35 and the second cylinder 326 are controlled to work synchronously by the operation button on the handle. The first cylinder 35 controls the ground ball 36 to move up and down, and the second cylinder 326 controls the rolling ball 327 to move up and down. When the ground ball 36 and the rolling ball 327 move down, the nylon rope 4 will increase the mowing height. Conversely, when the ground ball 36 and the rolling ball 327 move up, the nylon rope 4 will decrease the mowing height.

[0019] The height adjusting assembly 3 is arranged at one end of the operating rod 1, and the height adjusting assembly 3 comprises a whole adjusting part and a self adjusting part. The whole adjusting part comprises a self restoring part arranged at one end of the operating rod 1 and a lifting part arranged below the self restoring part. The self restoring part comprises a cross fixed plate 321 fixed at one end of the operating rod 1. The bottom of the cross fixed plate 321 is close to four end heads, and a spring 322 and a corrugated shielding ring 323 are fixed at the bottom of the cross fixed plate 321. Each spring 322 is respectively arranged at the inner side of the corresponding corrugated shielding ring 323. The corrugated shielding ring 323 is similar to a flexible corrugated pipe. When the spring 322 is stretched and bent, the corrugated shielding ring 323 can be stretched and bent, so as to avoid that the spring 322 is clamped by grass or branches.

[0020] The lifting part comprises a cross 324. One end of the four springs 322 is fixed to the top of the cross 324. Two hollow support legs 325 are fixed to the two sides of the cross 324. A second air cylinder 326 is fixed to the inner side of the hollow support leg 325. A rolling ball 327 in contact with the lawn in the garden is arranged at one end of the second air cylinder 326. An arc shielding plate 328 is arranged on the hollow support leg 325 below the operating rod 1. The arc shielding plate 328 is arranged on the two hollow support legs 325 on the same side. The arc shielding plate 328 is arranged on the hollow support leg 325 below the operating rod 1, so as to shield the grass falling and splashing, and avoid that the grass cut by the nylon rope 4 splashes to the lower limbs of the staff. The cross 324 and the cross fixed plate 321 are connected through a bidirectional hinge joint 329. The bidirectional hinge joint 329 can be regarded as being composed of two rotating heads in two directions. One rotating head can rotate in the left-right direction, and the other rotating head can rotate in the front-back direction. The two rotating heads are fixed and connected in one above the other, and are respectively connected to the cross 324 and the cross fixed plate 321.

[0021] The self-adjusting part includes two double mounting frames 31 and a range narrowing part. The double mounting frame 31 is composed of two independent mounting frames, which are respectively fixed on the hollow support legs 325 on both sides of the cross frame 324. The inner side of the double mounting frame 31 is provided with a grounding part, which is connected with the range narrowing part. The grounding part is used to control the range narrowing part to narrow the mowing range of the nylon rope 4. When the device moves to a position with a concave trend, the nylon rope 4 will be gathered upwards. When the device moves to a position with a convex trend, the nylon rope 4 will be gathered downwards. In this way, the mowing range of the nylon rope 4 is changed, and the local ground unevenness is automatically handled. It is equivalent to a real-time fine-tuning system, which is suitable for both the overall flat working area and the large wave curved terrain working area. The grounding part includes a fixed rod 32 fixed on the inner side of the double mounting frame 31. The outer side of the fixed rod 32 is slidably provided with two sliding seats 33. The lower side of the two sliding seats 33 is hingedly provided with a hinged rod 34. The downward end of the two hinged rods 34 is hingedly provided with a mounting shell. A protective cloth bag can also be arranged at the hinge position of the hinged rod 34 and the mounting shell to protect the rotation of the hinge position. The inner side of the mounting shell is fixedly provided with a first air cylinder 35. One end of the telescopic rod of the first air cylinder 35 extends to the lower side of the mounting shell and is fixedly provided with an earth 36. The outer side of the fixed rod 32 is sleeved with a flexible bellows 37. The flexible bellows 37 wraps the fixed rod 32 and the sliding seat 33, avoiding the small grass falling on the fixed rod 32 to affect the smooth sliding of the sliding seat 33. The rod body of the two hinged rods 34 extends to the outside of the flexible bellows 37. The position where the flexible bellows 37 is penetrated by the hinged rod 34 is provided with a protective cloth bag. One end of the protective cloth bag is fixed on the hinged rod 34 to close the opening, so as to protect the hinge position of the hinged rod 34 and the sliding seat 33.

[0022] The range narrowing part includes a U-shaped limiting frame 38 fixed on the middle of the cross frame 324 of the lifting part, a lifting shell 39, and two position driving parts arranged on the U-shaped limiting frame 38. The motor at the top of the mowing head 2 is fixed below the U-shaped limiting frame 38. The motor is located on the inner side of the lifting shell 39. The two sides of the lifting shell 39 are provided with a through slot 310. The U-shaped limiting frame 38 is arranged between the two through slots 310 and can only be vertically lifted by limiting the arrangement between the U-shaped limiting frame 38 and the through slot 310. The bottom of the U-shaped limiting frame 38 is fixedly provided with a double-layer ring plate 311 through a connecting arm. The double-layer ring plate 311 is composed of two ring plates with different inner diameters. The ring plate with a smaller inner diameter is located in the inner circle of the ring plate with a larger inner diameter. A certain gap is left between the two ring plates. The bottom of the U-shaped limiting frame 38 is provided with a sliding groove 312. The inner side of the sliding groove 312 is slidably provided with two sliding arms 313. The two sliding arms 313 are arranged in the gap between the two ring plates of the double-layer ring plate 311. One end of the two sliding arms 313 is provided with a gathering part.

[0023] The bit driver includes a driving arm 314 fixed on the top of each sliding seat 33 and an inverted trapezoidal plate 315 fixed on the lifting shell 39, the top of the inverted trapezoidal plate 315 is fixed with a connecting plate, the top of the connecting plate extends to the top of the cross 324 to keep the stability of the inverted trapezoidal plate 315 during lifting, the inverted trapezoidal plate 315 and the driving arm 314 are in the same vertical plane, and the two sides of the inverted trapezoidal plate 315 are fixed with inclined rods 316, and one end of each driving arm 314 is slidably arranged on the inclined rod 316.

[0024] The folding member includes two mounting seats 317 fixed on the outer side wall of the grass cutting head 2, the two mounting seats 317 are arranged at the positions of the grass cutting head 2 at which the nylon rope 4 extends at both ends, two rotating rods 318 are rotatably arranged between the two mounting seats 317, the nylon rope 4 passes between the two rotating rods 318, a connecting groove 319 is formed in the top of the rotating rod 318 above, a moving seat 320 is slidably arranged in the connecting groove 319, and one end of the sliding arm 313 is hingedly connected to the top of the moving seat 320.

[0025] When the device is placed horizontally, the rolling ball 327 and the ground contact ball 36 are in contact with the ground of the placement area, at this time, the driving arm 314 above the two sliding seats 33 is located at the middle position of the inclined rod 316, the inverted trapezoidal plate 315 is limited, and the distance between the U-shaped limiting frame 38 and the top of the inner wall of the lifting shell 39 and the distance between the lifting shell 39 and the bottom of the cross 324 are consistent, at this time, one end of the sliding arm 313 will make the moving seat 320 located at the middle position of the connecting groove 319, and the two rotating rods 318 will be in a state parallel to the ground.

[0026] In use: according to the height of the grass to be left during mowing, the first cylinder 35 and the second cylinder 326 can be controlled to work synchronously by the operation key on the handle before the mowing work is performed, so as to adjust the mowing height of the nylon rope 4, after the adjustment is completed, the handle of the handheld device pushes the device and starts the motor to drive the grass cutting head 2 to rotate, the grass cutting head 2 drives the mounting seat 317, the rotating rod 318 and the nylon rope 4 to rotate at high speed, when the nylon rope 4 rotates, a cutting surface is formed to cut off the grass to be cut, when the grass cutting head 2 is moved in the working area by the rolling ball 327 and the ground contact ball 36, if the working area is flat or a single-direction slope, the rolling ball 327 will follow the trend of the working area to change the inclination direction of the cross 324 as a whole through the bidirectional hinge 329, the cross 324 will change the inclination of the grass cutting head 2, so that the cutting surface of the nylon rope 4 can conform to the trend of the working area to mow the grass, so that the cutting height is uniform and consistent, which greatly reduces the operation fatigue, and the operator does not need to continuously adjust the angle of the grass cutting head by the fine movements of the wrist and arm to follow the terrain, thereby reducing the skill threshold.

[0027] If the working area of the device is a wide wave-shaped trend, on the basis of the automatic change of the direction of the grass head 2 and the cutting surface angle of the nylon rope 4 of the cross 324, through the ground contact of the ground contact 36 and the working area trend, when the ground contact 36 is moved to the concave working area, the two hinged rods 34 are pulled by the gravity of the ground contact 36, and the two sliding seats 33 are moved in the fixed rod 32 in the direction of approaching, so that the two corresponding driving arms 314 gradually approach, and slide on the inclined rod 316 in the direction of the inclined lower end of the inclined rod 316, so as to push the inverted trapezoidal plate 315 upward, so that the lifting shell 39 drives the sliding arm 313 to rise, the sliding seat 320 slides in the connecting groove 319 and drives the rotating bar 318 upward, and the rotating bar 318 is upwardly deflected at the rotating connection on the mounting seat 317, so as to gather the nylon rope 4 between the two upward, and the range of mowing is shortened after a part of the nylon rope 4 is gathered, so as to avoid that the too long extension of the nylon rope 4 at both ends bends the grass in the upward bending part of the mowing area to be too low; Conversely, if the ground contact 36 is moved to the upward convex working area, it is pushed upward by the ground of the working area, and the two hinged rods 34 will drive the two sliding seats 33 to move away from each other, so that the driving arm 314 slides to the upper end of the inclined rod 316, the inverted trapezoidal plate 315 drives the sliding arm 313 to descend through the lifting shell 39, and the sliding arm 313 drives the rotating bar 318 to deflect downward through the moving seat 320, so as to gather the nylon rope 4 between the two downward, so that the effective working length of the nylon rope 4 can be kept relatively constant when it is used on the lawn with a wave-shaped trend, which avoids the problem of missed cutting or inconsistent cutting height, makes the lawn more uniform after mowing, and allows the nylon rope 4 to automatically adapt to the terrain and allow the nylon rope 4 to float within a certain range, greatly reducing the operation difficulty and fatigue.

[0028] The above only describes the preferred embodiments of the present application, which are only illustrative but not limiting. Those skilled in the art understand that many changes, modifications and even equivalents can be made to the present application within the spirit and scope defined by the claims of the present application, but all will fall within the protection scope of the present application.

Claims

1. A garden trimmer having a height adjustment device, characterized in that, Include: Operating rod (1) and grass head (2), both sides of the grass head (2) extend nylon rope (3); Height adjustment assembly (3) is arranged at one end of the operating rod (1), the height adjustment assembly (3) includes adjusting part and self adjusting part, the adjusting part includes self restoring part arranged at one end of the operating rod (1) and lifting part arranged below the self restoring part, the self adjusting part includes two double mounting racks (31) and range reducing part, the inner side of the two double mounting racks (31) is provided with grounding part, the grounding part is connected with the range reducing part, and the grounding part is used for controlling the range reducing part to reduce the grassing range of the nylon rope (4).

2. The garden trimmer with height adjustment device according to claim 1, characterized in that, The grounding part includes a fixed rod (32) fixed to the inner side of the double mounting rack (31), the outer side of the fixed rod (32) slides two sliding seats (33), the lower side of the two sliding seats (33) is hinged with a hinge rod (34), the first cylinder (35) is arranged between the one end of the two hinge rods (34) through the mounting shell hinge, and the one end of the telescopic rod of the first cylinder (35) is fixed with an earth (36).

3. The garden trimmer with height adjustment device according to claim 2, characterized in that, The outer side of the fixed rod (32) is sleeved with a flexible bellows (37), one end of the two hinge rods (34) extends to the outside of the flexible bellows (37), and the other end of the hinge rod (34) is connected through the protective cloth bag and the flexible bellows (37).

4. The garden trimmer with height adjustment device according to claim 2, characterized in that, The range reducing part includes a U-shaped limiting frame (38) fixed below the lifting part, a lifting shell (39) and two position driving parts arranged on the U-shaped limiting frame (38), the bottom of the U-shaped limiting frame (38) is fixed with a motor, the top of the grass head (2) and the one end of the motor output shaft are fixedly connected, the two sides of the lifting shell (39) are provided with a through slot (310), the U-shaped limiting frame (38) is arranged between the two through slots (310), the bottom of the U-shaped limiting frame (38) is fixed with a double-layer ring plate (311) through a connecting arm, the bottom of the U-shaped limiting frame (38) is provided with a sliding groove (312), the inner side of the sliding groove (312) slides two sliding arms (313), the two sliding arms (313) are arranged on the inner side of the double-layer ring plate (311), and one end of the two sliding arms (313) is provided with a folding part.

5. The garden trimmer with height adjustment device according to claim 4, characterized in that, The position driving part includes a driving arm (314) fixed to the top of the two sliding seats (33) respectively and an inverted trapezoidal plate (315) fixed to the lifting shell (39), the two sides of the inverted trapezoidal plate (315) are fixed with inclined rods (316), and one end of the two driving arms (314) slides on the two inclined rods (316) respectively.

6. The garden trimmer with height adjustment device according to claim 4, characterized in that, The folding part includes two mounting seats (317) fixed to the outer side wall of the grass head (2), two rotating rods (318) are rotatably arranged between the two mounting seats (317), a connecting groove (319) is arranged at the top of the upper rotating rod (318), a moving seat (320) slides in the inner side of the connecting groove (319), and one end of the sliding arm (313) is hinged to the top of the moving seat (320).

7. The garden trimmer with height adjustment device according to claim 1, characterized in that, The self-repairing part comprises a cross fixed plate (321) fixed to one end of the operating rod (1), the bottom of the cross fixed plate (321) is fixed with a spring (322) and a corrugated shielding ring (323), and the spring (322) is located on the inner side of the corrugated shielding ring (323).

8. The garden trimmer with height adjustment device according to claim 7, characterized in that, The lifting part comprises a cross frame (324), one end of the spring (322) is fixed to the top of the cross frame (324), both sides of the cross frame (324) are fixed with two hollow support legs (325), the inner side of the hollow support leg (325) is fixed with a second air cylinder (326), one end of the telescopic rod of the second air cylinder (326) is fixed with a rolling ball (327), the hollow support legs (325) located on the same side are fixed with shielding arc-shaped plates (328), and the cross frame (324) and the cross fixed plate (321) are connected through a bidirectional hinge joint (329).

Images