Height adjusting structure of mower

Abstract

The utility model discloses a hay mower height adjusting structure which comprises a hay mower chassis (1), a front axle (3) provided with two front wheels (2) and a rear axle (5) provided with two rear wheels (4), a connecting rod structure comprises a first driving block (6), the first driving block (6) is fixed in the hay mower chassis (1), a driving mechanism is provided with a control knob (7), and the control knob (7) is connected with the hay mower chassis (1). And the control knob (7) is positioned on a panel (9) of a mower push rod (8). According to the height adjusting structure, lifting driving is achieved through the motor and the eccentric first driving block, the structure is simple, reliability and durability are good, the lifting stroke range is wide, the height adjusting structure can be suitable for more scenes, meanwhile, a rotary knob for adjusting the mowing height is placed on the push rod, and the mowing height can be adjusted only by easily rotating the rotary knob.

Description

Technical Field

[0001] This utility model relates to the field of garden tool technology, specifically a height adjustment structure for a lawnmower. Background Technology

[0002] Currently, an electrically adjustable lawnmower is disclosed, comprising a front axle and a rear axle mounted on the lawnmower chassis, a front swing arm hinged to the front axle of the lawnmower chassis, a rear swing arm hinged to the rear axle, a connecting rod between the front and rear swing arms, and a drive assembly for driving the connecting rod. One end of the connecting rod is hinged to the upper end of the front swing arm, and the other end is hinged to the rear swing arm, forming a four-bar linkage. The drive assembly includes a reducer mounted on the lawnmower chassis, with a drive motor connected to the input shaft and an eccentric cam mounted on the output shaft. The connecting rod has a vertically shaped groove, and the eccentric cam is inserted into the groove. The control switch for the drive motor is mounted on the lawnmower's handle. This structure drives the connecting rod through an eccentric cam. However, due to the size limitations of the eccentric cam and the groove, the lifting range of the lawnmower chassis is relatively small, which cannot meet the needs of various applications.

[0003] A lawnmower electric drive cutting height adjustment device is also disclosed, comprising: a front wheel axle for mounting two front wheels; a rear wheel axle for mounting two rear wheels; two crank connecting rods for rotatably connecting the front wheel axle and the rear wheel axle respectively; and an electric drive adjustment assembly fixedly mounted on the housing and rotatably connected to the two crank connecting rods, for driving the two crank connecting rods to pull or push the front wheel axle and the rear wheel axle to respectively drive the front wheels and the rear wheels to move up and down. The electric drive adjustment assembly includes a worm gear, a drive motor for providing rotational driving force to the worm gear, a turbine rocker arm driven by the worm gear, and a turbine housing for accommodating the worm gear and the turbine rocker arm and fitted outside the drive motor; the turbine rocker arm is mounted in the central shaft hole of the turbine housing via a coupling and a key. Because the swing of the turbine rocker is achieved through the turbine and screw, the swing angle of the turbine rocker is also limited by the extension and retraction distance of the turbine and screw, resulting in a small lifting range of the lawnmower chassis, which cannot meet the needs of various applications. In addition, the bottom of the turbine rocker of this structure is an arc gear, which requires high machining precision, resulting in high cost and poor durability.

[0004] Furthermore, current lawnmowers offer several methods for adjusting mowing height, including center adjustment, wheel-side adjustment, and button adjustment. All of these methods require the user to bend down near the machine to operate, which is inconvenient. Firstly, the user needs to approach the machine and bend over; secondly, the user needs to use considerable force to adjust the mowing height lever. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a lawnmower height adjustment structure that uses a motor and an eccentric first drive block to achieve lifting drive, which has a simple structure, good reliability and durability, and a wide lifting stroke range, making it applicable to more scenarios. At the same time, the knob for adjusting the mowing height is placed on the push rod, so that the height of the lawnmower can be adjusted by simply rotating the knob.

[0006] The technical solution of this utility model is to provide a lawnmower height adjustment structure with the following structure: a lawnmower chassis, a front axle with two front wheels, and a rear axle with two rear wheels. The front and rear axles are connected to the bottom of the lawnmower chassis and are connected to a drive mechanism inside the lawnmower chassis via a linkage structure. The linkage structure includes a first drive block, which is fixed inside the lawnmower chassis and connected to the output end of the drive mechanism. When the drive mechanism rotates forward, it pushes the first drive block to rotate in one direction, causing the lawnmower chassis to rise with the front and rear wheels as a reference. When the drive mechanism rotates in reverse, it pushes the first drive block to rotate in another direction, causing the lawnmower chassis to lower with the front and rear wheels as a reference. The drive mechanism is equipped with a control knob located on the panel of the lawnmower push rod.

[0007] The front and rear axles are respectively movably embedded in the grooves of the corresponding lawnmower chassis, and are positioned at any height within the grooves via a connecting rod structure.

[0008] The connecting rod structure also includes a first crank connecting rod and a second crank connecting rod. One end of the first crank connecting rod is connected to the front wheel axle, and one end of the second crank connecting rod is connected to the rear wheel axle. The other end of the first crank connecting rod is rotatably connected to the other end of the second crank connecting rod and hinged to the hinge point of the first drive block. The hinge point of the first drive block is eccentrically located at the output end of the drive mechanism.

[0009] The first drive block has a through hole, and the drive mechanism includes a motor and an output shaft. The output shaft is embedded in the through hole, and the output shaft and the through hole have a circumferentially positioned plane.

[0010] Both the drive mechanism and the control knob are connected to the control panel inside the lawnmower, and the height of the lawnmower chassis is selected by controlling the knob.

[0011] When the drive mechanism drives the first drive block to rotate, the lawnmower chassis has the same rising distance for the front wheels and the same falling distance for the rear wheels.

[0012] With the above structure, this utility model has the following advantages: 1. Because the linkage structure includes a first drive block, which is fixed inside the lawnmower chassis and connected to the output end of the drive mechanism, the first drive block is pushed to swing in two directions by the drive mechanism. It rises in one direction and falls in the opposite direction. When the drive mechanism rotates forward, it pushes the first drive block to rotate in one direction, causing the lawnmower chassis to rise with the front and rear wheels as a reference. When the drive mechanism rotates in reverse, it pushes the first drive block to rotate in the other direction, causing the lawnmower chassis to fall with the front and rear wheels as a reference. This structure has a wide range of lifting strokes and can be applied to more scenarios. 2. The swing range of the first drive block is determined by the distance between the hinge point of the first drive block and the output shaft, thus ensuring the swing amplitude and further increasing the lifting range of the lawnmower chassis. 3. The knob for adjusting the mowing height is placed on the push rod. When consumers need to adjust the mowing height, they only need to easily rotate the knob to adjust the desired mowing height, which is convenient and labor-saving.

[0013] As an improvement, the front and rear axles are respectively movably embedded in the grooves of the corresponding lawnmower chassis, and positioned at any height within the grooves via a linkage structure, thereby allowing the lawnmower chassis to rise and fall in the vertical direction.

[0014] As an improvement, the linkage structure further includes a first crank connecting rod and a second crank connecting rod. One end of the first crank connecting rod is connected to the front wheel axle, and one end of the second crank connecting rod is connected to the rear wheel axle. The other end of the first crank connecting rod is rotatably connected to the other end of the second crank connecting rod and hinged to the hinge point of the first drive block. The hinge point of the first drive block is eccentrically located at the output end of the drive mechanism, forming a four-bar linkage structure that enables the lawnmower chassis to rise and fall.

[0015] As an improvement, the first drive block is provided with a through hole, and the drive mechanism includes a motor and an output shaft. The output shaft is embedded in the through hole, and the output shaft and the through hole are provided with a circumferential positioning plane to increase circumferential positioning.

[0016] As an improvement, both the drive mechanism and the control knob are connected to the control board inside the lawnmower. The height of the lawnmower chassis can be selected by controlling the knob, so that the operator does not have to bend over to control it and can adjust it while standing. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the lawnmower of this utility model.

[0018] Figure 2 This is a three-dimensional schematic diagram of the lawnmower chassis of this utility model.

[0019] Figure 3This is a schematic diagram of the height adjustment structure of the lawnmower of this utility model.

[0020] Figure 4 This is a schematic diagram of the height adjustment structure of the lawnmower according to this utility model from another angle.

[0021] Figure 5 This is a schematic diagram of the split structure of the lawnmower height adjustment structure of this utility model.

[0022] Figure 6 This is a schematic diagram showing the separation of the drive structure and the first drive block of this utility model.

[0023] As shown in the figure:

[0024] 1. Lawn mower chassis; 2. Front wheel; 3. Front axle; 4. Rear wheel; 5. Rear axle; 6. First drive block; 7. Control knob; 8. Lawn mower push rod; 9. Panel; 10. First crank connecting rod; 11. Second crank connecting rod; 12. Motor; 13. Through hole; 14. Output shaft. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-6 As shown, the lawnmower height adjustment structure of this utility model includes a lawnmower chassis 1, a front wheel axle 3 with two front wheels 2, and a rear wheel axle 5 with two rear wheels 4. The front wheel axle 3 and the rear wheel axle 5 are connected to the bottom of the lawnmower chassis 1, and the front wheel axle 3 and the rear wheel axle 5 are connected to the drive mechanism inside the lawnmower chassis 1 through a linkage structure.

[0027] The linkage structure includes a first drive block 6, which is fixed inside the lawnmower chassis 1 and connected to the output end of the drive mechanism. When the drive mechanism rotates forward, it pushes the first drive block 6 to rotate in one direction, causing the lawnmower chassis 1 to rise with the front wheel 2 and the rear wheel 4 as a reference. When the drive mechanism rotates in reverse, it pushes the first drive block 6 to rotate in another direction, causing the lawnmower chassis 1 to fall with the front wheel 2 and the rear wheel 4 as a reference. The drive mechanism is equipped with a control knob 7, which is located on the panel 9 of the lawnmower push rod 8.

[0028] The front axle 3 and rear axle 5 are respectively movably embedded in the grooves of the corresponding lawnmower chassis 1, and are positioned at any height within the grooves via a linkage structure. Since the front wheel 2 and rear wheel 4 are pressed on the ground, the lawnmower chassis 1 moves up and down with the front wheel 2 and rear wheel 4 as a reference when it is raised or lowered. Therefore, the grooves of the lawnmower chassis 1 move up and down along the front axle 3 and rear axle 5.

[0029] like Figure 3 and Figure 4As shown, the connecting rod structure also includes a first crank connecting rod 10 and a second crank connecting rod 11. One end of the first crank connecting rod 10 is connected to the front wheel axle 3, and one end of the second crank connecting rod 11 is connected to the rear wheel axle 5. The other end of the first crank connecting rod 10 is rotatably connected to the other end of the second crank connecting rod 11 and hinged to the hinge point of the first drive block 6. The hinge point of the first drive block 6 is eccentrically located at the output end of the drive mechanism.

[0030] like Figure 6 As shown, the first drive block 6 has a through hole 13. The drive mechanism includes a motor 12 and an output shaft 14. The output shaft 14 is embedded in the through hole 13, and the output shaft 14 and the through hole 13 have a circumferentially positioned plane. During operation, the motor 12 rotates, which drives the first drive block 6 to rotate through the output shaft 14. The hinge point connected to the first drive block 6 then swings around the output shaft 14.

[0031] Both the drive mechanism and the control knob 7 are connected to the control board inside the lawnmower. The height of the lawnmower chassis 1 is selected by controlling the knob 7. When consumers need to adjust the mowing height, they only need to easily rotate the knob to adjust the desired mowing height. The operation is convenient and labor-saving.

[0032] When the drive mechanism drives the first drive block 6 to rotate, the lawnmower chassis 1 has the same rising distance for the front wheel 2 and the same rising distance for the rear wheel 4, and the same falling distance for the front wheel 2 and the rear wheel 4, so that the lawnmower chassis 1 can remain in a stable state no matter which position it is raised or lowered to.

Claims

1. A height adjustment structure for a lawnmower, comprising a lawnmower chassis (1), a front axle (3) with two front wheels (2), and a rear axle (5) with two rear wheels (4), wherein the front axle (3) and the rear axle (5) are connected to the bottom of the lawnmower chassis (1), and the front axle (3) and the rear axle (5) are connected to a drive mechanism inside the lawnmower chassis (1) via a linkage structure, characterized in that: The linkage structure includes a first drive block (6), which is fixed inside the lawnmower chassis (1). The first drive block (6) is connected to the output end of the drive mechanism. When the drive mechanism rotates forward, it pushes the first drive block (6) to rotate in one direction, causing the lawnmower chassis (1) to rise with the front wheel (2) and rear wheel (4) as reference. When the drive mechanism rotates in reverse, it pushes the first drive block (6) to rotate in another direction, causing the lawnmower chassis (1) to fall with the front wheel (2) and rear wheel (4) as reference. The drive mechanism is provided with a control knob (7), which is located on the panel (9) of the lawnmower push rod (8).

2. The mower height adjustment structure according to claim 1, characterized by: The front axle (3) and the rear axle (5) are respectively movably embedded in the grooves of the corresponding lawnmower chassis (1) and positioned at any height within the grooves via a connecting rod structure.

3. The mower height adjustment structure according to claim 1, characterized by: The connecting rod structure also includes a first crank connecting rod (10) and a second crank connecting rod (11). One end of the first crank connecting rod (10) is connected to the front wheel axle (3), and one end of the second crank connecting rod (11) is connected to the rear wheel axle (5). The other end of the first crank connecting rod (10) is rotatably connected to the other end of the second crank connecting rod (11) and hinged to the hinge point of the first drive block (6). The hinge point of the first drive block (6) is eccentrically located at the output end of the drive mechanism.

4. The mower height adjustment structure according to claim 3, characterized by: The first drive block (6) is provided with a through hole (13). The drive mechanism includes a motor (12) and an output shaft (14). The output shaft (14) is embedded in the through hole (13), and the output shaft (14) and the through hole (13) are provided with a circumferentially positioned plane.

5. The mower height adjustment structure according to claim 1, characterized by: The drive mechanism and the control knob (7) are both connected to the control board inside the lawnmower. The height of the lawnmower chassis (1) is selected by controlling the knob (7).

6. The mower height adjustment structure according to claim 1, characterized by: When the drive mechanism drives the first drive block (6) to rotate, the lawnmower chassis (1) has the same rising distance at the front wheel (2) and the same rising distance at the rear wheel (4), and the same falling distance at the front wheel (2) and the same falling distance at the rear wheel (4).

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