Adjusting mechanism of mower

Abstract

The utility model discloses an adjusting mechanism of a mower. The adjusting mechanism comprises a front wheel assembly, a rear wheel assembly, a connecting rod and a machine shell. The device is characterized by further comprising a positioning seat plate and an adjusting handle assembly. And the positioning seat plate is fixedly arranged on the rear part of the connecting rod. The adjusting handle assembly comprises a handle seat and a positioning handle, the handle seat is fixedly arranged on the machine shell, and a holding limiting part is arranged on the upper portion of the handle seat. The positioning handle is slidably arranged in the handle seat along the vertical direction, and the upper part is limited by the holding limiting part. And the positioning handle is matched with the positioning seat plate to limit the mower at a corresponding height.

Description

Technical Field

[0001] The utility model relates to the technical field of garden tools, and particularly relates to an adjusting mechanism for height adjustment of a lawn mower. Background Art

[0002] An electric lawn mower is a commonly used garden tool. The electric lawn mower has a machine shell, an upper cover, front and rear walking wheel sets connected to the bottom of the machine shell, and a handrail connected to the top of the machine shell. The machine shell is composed of an upper machine shell and a lower machine shell. A main engine room and a grass air duct are arranged inside the machine shell. The output power of the motor is transmitted to the main shaft through a connecting shaft to drive the tool assembly to rotate. A grass collection hopper is connected to the rear of the machine shell, and the grass cut by the blade is thrown into the grass collection hopper through the grass air duct. When mowing the grass, it is necessary to determine the mowing height according to actual needs, so it is necessary to adjust the height of the blade. Chinese patent document CN212278926U discloses a cutting height adjustment mechanism for a lawn mower. The mechanism includes a connecting rod and a gear plate with a plurality of gear slots. One end of the connecting rod is rotatably connected to the gear plate, and the other end of the connecting rod is connected with a front wheel shaft assembly; a rotating member pivotally connected to the machine shell and fixed with a limit pin; a handle for the user to operate to raise or lower the height of the machine shell; an unlocking member having an unlocking position and a locking position. In the unlocking position, the handle can raise or lower the height of the machine shell, and in the locking position, the height of the machine shell remains fixed; a height adjustment rod, one end of the height adjustment rod is pivotally connected to the rotating member; the other end of the height adjustment rod is connected to the unlocking member; the unlocking member can be operated to move relative to the handle to drive the height adjustment rod and drive the rotating member to rotate, so that the limit pin is engaged or disengaged with the gear slot. When the limit pin is engaged with the gear slot, the force of the whole machine acting on the limit pin is dispersed and transmitted to the machine shell through the rotating member, and the limit pin can be reliably locked in the gear slot. This mechanism is relatively complex to operate, requires both hands to cooperate to complete the adjustment, and cannot accurately position to the required height during the adjustment. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an adjusting mechanism for a lawn mower for height adjustment, which has a simple structure and is convenient to operate.

[0004] The basic technical solution for achieving the purpose of the present utility model is as follows: An adjustment mechanism for a lawn mower includes a front wheel assembly, a rear wheel assembly, a connecting rod, and a machine shell. The front wheel assembly includes front wheels, a front wheel adjustment shaft, and front wheel mounting plates. There are two front wheels and two front wheel mounting plates. The two front wheel mounting plates are respectively fixedly arranged at the left and right ends of the front wheel adjustment shaft, and the front wheel adjustment shaft is rotatably arranged on the front part of the machine shell. The two front wheels are respectively rotatably arranged on a corresponding front wheel mounting plate, the two front wheels are coaxially arranged, and the front wheels are eccentrically arranged with respect to the front wheel adjustment shaft. The rear wheel assembly includes rear wheels, a rear wheel adjustment shaft, and rear wheel mounting plates. There are two rear wheels and two rear wheel mounting plates. The two rear wheel mounting plates are respectively fixedly arranged at the left and right ends of the rear wheel adjustment shaft, and the rear wheel adjustment shaft is rotatably arranged on the rear part of the machine shell. The two rear wheels are respectively rotatably arranged on a corresponding rear wheel mounting plate, the two rear wheels are coaxially arranged, and the rear wheels are eccentrically arranged with respect to the rear wheel adjustment shaft. The front end of the connecting rod is rotatably arranged on the front wheel mounting plate on the right side, and the rear end of the connecting rod is rotatably arranged on the corresponding rear wheel mounting plate on the right side. Its structural feature is that it further includes a positioning seat plate and an adjustment handle assembly. The positioning seat plate is fixedly arranged on the rear part of the connecting rod. The adjustment handle assembly includes a handle seat and a positioning handle. The handle seat is fixedly arranged on the machine shell, and a holding limit part is provided on the upper part of the handle seat. The positioning handle is slidably arranged in the handle seat in the up and down direction, and the upper part is limited by the holding limit part. The positioning handle cooperates with the positioning seat plate to limit the lawn mower at a corresponding height.

[0005] Further, for accurate height adjustment: A height marking device is provided on the machine shell. A set of height values is provided on the height marking device, and an indicating rod protruding forward is provided on the positioning seat plate. The indicating rod cooperates with the height marking device.

[0006] Further, for reliable adjustment: A set of positioning grooves is provided on the positioning seat plate, and the positioning grooves are arranged in sequence from front to back. The positioning handle is in a T shape, and a positioning post protruding forward and cooperating with the positioning grooves on the positioning seat plate is provided on the positioning handle.

[0007] Further, for convenient operation: The adjustment handle assembly further includes a handle reset driving device. The handle reset driving device is used to reset the positioning handle downward, that is, to make the positioning post inserted into the corresponding positioning groove and not fall off.

[0008] Further, for light and quick operation: It further includes a lifting driving device using a tension spring. The front end of the tension spring is fixedly arranged on the machine shell, and the other end is fixedly arranged on the connecting rod.

[0009] The utility model has the following beneficial effects: (1) The adjustment mechanism of the lawn mower of the utility model has a simple structure and can be operated with one hand. When operating, first hold the holding limit part. While unlocking the positioning handle and the positioning slot, the lawn mower can be lifted with one hand. Then continue to lift upward, and the housing can be lifted upward through the positioning handle and the holding limit part. When reaching the required height value, then release the positioning handle and re-match it with the corresponding positioning slot, and put down the housing to complete the height adjustment. (2) The adjustment mechanism of the lawn mower of the utility model is provided with a lifting drive device. While lifting the housing, the connecting rod drives the height of each wheel to change, which is beneficial to improving efficiency and is more labor-saving. (3) The adjustment mechanism of the lawn mower of the utility model is provided with a height marking device, so that the adjustment is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Figure showing the lawn mower with this structure in the lowest position.

[0011] Figure 2 Figure showing the lawn mower with this structure in the middle position.

[0012] Figure 3 Figure showing the lawn mower with this structure in the highest position.

[0013] Figure 4 For Figure 1 left view schematic diagram.

[0014] Figure 5 For Figure 1 top view schematic diagram.

[0015] Figure 6 For viewing from Figure 1 left front upper view schematic diagram.

[0016] Figure 7 For viewing from Figure 1 left rear upper view schematic diagram of the adjustment mechanism in the lowest position.

[0017] Figure 8 For viewing from Figure 3 left rear upper view schematic diagram of the adjustment mechanism in the highest position.

[0018] Figure 9 For viewing from Figure 3 left front upper view schematic diagram of the adjustment mechanism.

[0019] Figure 10 For viewing from Figure 1 left front upper view schematic diagram of the housing.

[0020] The reference numerals in the drawings are:

[0021] Front wheel assembly 1, front wheel 1-1, front wheel adjustment shaft 1-2, front wheel mounting plate 1-3,

[0022] Rear wheel assembly 2, rear wheel 2-1, rear wheel adjustment shaft 2-2, rear wheel mounting plate 2-3,

[0023] Link 3,

[0024] Positioning seat plate 4, positioning groove 4-1, indicating rod 4-2,

[0025] Adjusting handle assembly 5, handle seat 5-1, holding limit part 5-11, positioning handle 5-2, positioning post 5-21,

[0026] Lifting drive device 6, housing 7, height marking device 7-1. Detailed implementation mode

[0027] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to specific embodiments and in conjunction with the accompanying drawings. The description of the orientation of the present utility model is carried out according to Figure 1 the orientation shown, that is, Figure 1 the up, down, left, and right directions shown are the up, down, front, and back directions described (that is, the direction in which the lawn mower advances is the front), Figure 1 the side facing is the left side, and the side deviating from Figure 1 is the right side. The terms "front", "rear", "left", "right", etc. indicating the orientation or position relationship are based on the position relationship shown in the drawings, and are only for the convenience of describing the present utility model or simplifying the description, rather than indicating a specific orientation that must be had. In the description of the present utility model, the terms "first", "second", etc. are only used for differential description and cannot be understood as indicating or implying relative importance.

[0028] (Embodiment 1)

[0029] See Figures 1 to 10 , the adjustment mechanism of the lawn mower of the present utility model includes a front wheel assembly 1, a rear wheel assembly 2, a link 3, a positioning seat plate 4, an adjusting handle assembly 5, a lifting drive device 6 and a housing 7. A height marking device 7-1 is provided on the housing 7, and a set of height values are provided on the height marking device 7-1, and the height values gradually decrease from front to back, and the height values are used to represent the height of the grass after mowing.

[0030] The front wheel assembly 1 includes a front wheel 1-1, a front wheel adjusting shaft 1-2, and a front wheel mounting plate 1-3. There are two front wheels 1-1 and two front wheel mounting plates 1-3. The two front wheel mounting plates 1-3 are respectively fixedly arranged at the left and right ends of the front wheel adjusting shaft 1-2, and the front wheel adjusting shaft 1-2 is rotatably arranged on the front part of the machine housing 7. The two front wheels 1-1 are respectively rotatably arranged on a corresponding front wheel mounting plate 1-3. The two front wheels 1-1 are coaxially arranged, and the front wheel 1-1 is eccentrically arranged with respect to the front wheel adjusting shaft 1-2.

[0031] The rear wheel assembly 2 includes a rear wheel 2-1, a rear wheel adjusting shaft 2-2, and a rear wheel mounting plate 2-3. There are two rear wheels 2-1 and two rear wheel mounting plates 2-3. The two rear wheel mounting plates 2-3 are respectively fixedly arranged at the left and right ends of the rear wheel adjusting shaft 2-2, and the rear wheel adjusting shaft 2-2 is rotatably arranged on the rear part of the machine housing 7. The two rear wheels 2-1 are respectively rotatably arranged on a corresponding rear wheel mounting plate 2-3. The two rear wheels 2-1 are coaxially arranged, and the rear wheel 2-1 is eccentrically arranged with respect to the rear wheel adjusting shaft 2-2.

[0032] The front end of the connecting rod 3 is rotatably arranged on the right front wheel mounting plate 1-3, and its rotation axis is arranged in a triangular distribution with the rotation axis of the front wheel 1-1 and the axis of the front wheel adjusting shaft 1-2. The rear end of the connecting rod 3 is rotatably arranged on the corresponding right rear wheel mounting plate 2-3, and its rotation axis is arranged in a triangular distribution with the rotation axis of the rear wheel 2-1 and the axis of the rear wheel adjusting shaft 2-2. Thus, the distance between the rotation axis of the front wheel 1-1 and the front wheel adjusting shaft 1-2 in the vertical direction is adjusted by the connecting rod 3, and the distance between the rotation axis of the rear wheel 2-1 and the rear wheel adjusting shaft 2-2 in the vertical direction is adjusted by the connecting rod 3, and then the height of the machine housing 7 is changed to realize the adjustment of the height of the lawn mower.

[0033] The positioning seat plate 4 is fixedly arranged on the rear part of the connecting rod 3. A set of positioning grooves 4-1 are provided on the positioning seat plate 4. The positioning grooves 4-1 are arranged in sequence from front to back. The positioning grooves 4-1 open upward and penetrate its left and right. An indicating rod 4-2 protruding forward is provided on the positioning seat plate 4. The indicating rod 4-2 cooperates with the height marking device 7-1 to display the current height of the lawn mower.

[0034] The adjustment handle assembly 5 includes a handle base 5-1, a positioning handle 5-2, and a handle reset driving device. The handle base 5-1 is fixedly arranged on the machine housing 7, and a holding limit portion 5-11 is provided on the upper part of the handle base 5-1. The positioning handle 5-2 is slidably arranged in the handle base 5-1 in the up-and-down direction, and the upper part is limited by the holding limit portion 5-11. The positioning handle 5-2 is T-shaped, and a positioning post 5-21 that protrudes forward and cooperates with the positioning groove 4-1 of the positioning seat plate 4 is provided on the positioning handle 5-2. The handle reset driving device is a compression spring, and the compression spring is arranged between the upper part of the positioning handle 5-2 and the holding limit portion 5-11, and is used to reset the positioning handle 5-2 downward, that is, to make the positioning post 5-21 inserted into the corresponding positioning groove 4-1 and not fall off.

[0035] The lifting driving device 6 uses a tension spring. One end of the front end of the tension spring is fixedly arranged on the machine housing 7, and the other end of the rear end is fixedly arranged on the connecting rod 3, and is used to generate a force for pulling the connecting rod 3 forward.

[0036] When the adjustment mechanism of the lawn mower of the present utility model is in use, when adjusting from the lowest position, first hold the holding limit portion 5-11, and then lift the positioning handle 5-2 from bottom to top to make the positioning post 5-21 fall off the positioning groove 4-1 of the positioning seat plate 4, and then continue to move upward. The machine housing 7 is lifted upward through the positioning handle 5-2 and the holding limit portion 5-11, and the connecting rod 3 moves forward under the pulling of the tension spring of the lifting driving device 6. When the indicating rod 4-2 moves forward to the height value that needs to be adjusted, then release the positioning handle 5-2, and the positioning handle 5-2 moves downward under the action of the compression spring of the handle reset driving device, so that the positioning post 5-21 is inserted into the corresponding positioning groove 4-1 to complete the height adjustment.

[0037] In the above specific embodiments, the purpose, technical solution, and beneficial effects of the present utility model are further described in detail. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An adjustment mechanism for a lawn mower, comprising a front wheel assembly (1), a rear wheel assembly (2), a connecting rod (3) and a machine housing (7); the front wheel assembly (1) includes a front wheel (1-1), a front wheel adjustment shaft (1-2) and a front wheel mounting plate (1-3); 2. There are two front wheels (1-1) and two front wheel mounting plates (1-3); the two front wheel mounting plates (1-3) are respectively fixedly arranged at the left and right ends of the front wheel adjustment shaft (1-2), and the front wheel adjustment shaft (1-2) is rotatably arranged on the front part of the machine housing (7); the two front wheels (1-1) are respectively rotatably arranged on a corresponding front wheel mounting plate (1-3), the two front wheels (1-1) are coaxially arranged, and the front wheel (1-1) is eccentrically arranged with respect to the front wheel adjustment shaft (1-2); the rear wheel assembly (2) includes a rear wheel (2-1), a rear wheel adjustment shaft (2-2) and a rear wheel mounting plate (2-3); there are two rear wheels (2-1) and two rear wheel mounting plates (2-3); the two rear wheel mounting plates (2-3) are respectively fixedly arranged at the left and right ends of the rear wheel adjustment shaft (2-2), and the rear wheel adjustment shaft (2-2) is rotatably arranged on the rear part of the machine housing (7); the two rear wheels (2-1) are respectively rotatably arranged on a corresponding rear wheel mounting plate (2-3), the two rear wheels (2-1) are coaxially arranged, and the rear wheel (2-1) is eccentrically arranged with respect to the rear wheel adjustment shaft (2-2); the front end of the connecting rod (3) is rotatably arranged on the front wheel mounting plate (1-3) on the right side, and the rear end of the connecting rod (3) is rotatably arranged on the corresponding rear wheel mounting plate (2-3) on the right side, and it is characterized in that: It further includes a positioning seat plate (4) and an adjusting handle assembly (5); the positioning seat plate (4) is fixedly arranged on the rear part of the connecting rod (3); the adjusting handle assembly (5) includes a handle seat (5-1) and a positioning handle (5-2), the handle seat (5-1) is fixedly arranged on the machine housing (7), and a holding limiting part (5-11) is arranged on the upper part of the handle seat (5-1); the positioning handle (5-2) is slidably arranged in the handle seat (5-1) in the up-and-down direction and is limited by the holding limiting part (5-11) at the upper part; the positioning handle (5-2) cooperates with the positioning seat plate (4) to limit the lawn mower at a corresponding height.

2. The adjustment mechanism of the lawn mower according to claim 1, characterized in that: A height marking device (7-1) is arranged on the machine housing (7), a set of height values is arranged on the height marking device (7-1), and an indicating rod (4-2) protruding forward is arranged on the positioning seat plate (4); the indicating rod (4-2) cooperates with the height marking device (7-1).

3. The adjustment mechanism of the lawn mower according to claim 1, characterized in that: A set of positioning grooves (4-1) is arranged on the positioning seat plate (4), and the positioning grooves (4-1) are arranged in sequence from front to back; the positioning handle (5-2) is T-shaped, and a positioning column (5-21) protruding forward and cooperating with the positioning grooves (4-1) of the positioning seat plate (4) is arranged on the positioning handle (5-2).

4. The adjustment mechanism of the lawn mower according to claim 3, characterized in that: The adjusting handle assembly (5) further includes a handle reset driving device; the handle reset driving device is used to reset the positioning handle (5-2) downward, that is, to make the positioning column (5-21) inserted into the corresponding positioning groove (4-1) without falling off.

5. The adjustment mechanism of the lawn mower according to claim 1, characterized in that: It further includes a lifting driving device (6) which adopts a tension spring, the front end of the tension spring is fixedly arranged on the machine housing (7), and the other end is fixedly arranged on the connecting rod (3).

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