Grass mower of lawn mower

Abstract

The utility model discloses a grass mowing machine tool of a lawn mower, which comprises a shell, a power shaft is vertically arranged in the middle of the shell, and the lower end of the power shaft extends into the shell and is connected with a grass mowing blade; a shifting fork shaft is arranged on one side of the power shaft, and the lower end of the shifting fork shaft extends into the shell and is connected with a shifting fork; the grass cutting blade is in sliding fit connection with the lower end of the power shaft through a connecting piece and can synchronously rotate along with the power shaft; the connecting piece is sleeved with a bearing, and the bearing is tightly matched with the connecting piece; one end of the shifting fork is connected with the shifting fork shaft, the other end of the shifting fork is connected with a bearing seat, and the bearing is arranged on the bearing seat and is tightly matched with the bearing seat. When the lawn mower is used for mowing grass, the noise is low, the grass mowing flatness is high, the blade height adjusting sensitivity is high, and the lawn mower is simple in structure and convenient to popularize and apply.

Description

Technical Field

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

[0002] A lawn mower is a mechanical device used for mowing and cutting grass. It is mainly composed of a frame, an engine, a traveling mechanism, a mowing tool, and a control part. The mowing tool mainly includes a power shaft, a housing, a blade, and a height adjustment mechanism. When working, the engine drives the power shaft of the mowing tool, and the power shaft drives the blade, which rotates at high speed to mow the lawn. At the same time, by adjusting the height adjustment mechanism, the height of the blade from the ground is adjusted to control the stubble height after mowing.

[0003] The existing blade height adjustment mechanism includes a fork shaft, a fork and a sleeve. The sleeve is fixedly connected to the blade, and a fork groove is provided on the sleeve for cooperating with the fork. When adjusting the blade height, the fork can be driven to move up and down by moving the fork shaft up and down, thereby realizing the up and down movement of the sleeve and the blade. However, the fork is fixed by providing a fork groove, and the fork and the fork groove will wear out after the lawn mower works for a long time, so that the gap between the fork and the fork groove increases, thereby generating a large noise; at the same time, after the gap increases, the position of the blade cannot be fixed, so that the blade will jump up and down during operation, reducing the smoothness of the grass cutting; and when the fork moves up and down, the height adjustment of the blade cannot be realized in time, which also reduces the sensitivity of the blade adjustment. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a lawn mower for a lawn mower, which solves the problems of the existing lawn mowers, such as high noise, low grass cutting smoothness and reduced sensitivity of blade height adjustment.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A lawn mower tool comprises a housing, a power shaft is vertically arranged in the middle of the housing, the lower end of the power shaft extends into the housing and is connected to a grass cutting blade; a fork shaft is arranged on one side of the power shaft, the lower end of the fork shaft extends into the housing and is connected to a fork; the grass cutting blade is slidably connected to the lower end of the power shaft through a connecting piece and can rotate synchronously with the power shaft; a bearing is sleeved on the connecting piece and the bearing is tightly fitted with the connecting piece; one end of the fork is connected to the fork shaft, and the other end is connected to a bearing seat, the bearing is installed on the bearing seat and is tightly fitted with the bearing seat.

[0007] Furthermore, the connecting member includes a sleeve and a connecting plate which are integrally formed, and the mowing blade is fixed to the connecting plate by bolts.

[0008] Furthermore, the lower end of the power shaft extends into the housing and is formed into a spline shaft. The sleeve is provided with spline teeth matching the spline shaft and can cooperate with the spline shaft to achieve sliding connection.

[0009] Furthermore, a height adjustment nut is sleeved on the upper end of the fork shaft, and the height adjustment nut is fixedly connected to the housing and cooperates with the fork shaft thread to achieve height adjustment.

[0010] Furthermore, a rotating handle is provided at the upper end of the fork shaft.

[0011] Furthermore, the shell is provided with running wheels on the front side, with mud guard films on the rear side, with a discharge port on the side, and with a discharge port baffle above the discharge port.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The mowing tool of the utility model lawn mower realizes fixed connection with the sleeve by replacing the fork with a bearing seat, thereby driving the mowing blade to move up and down, and realizing height adjustment of the mowing blade. In this way, it is possible to avoid opening a fork slot on the sleeve to install the fork, thereby preventing the long-term operation of the lawn mower, which will cause the fork and the fork slot to wear, thereby preventing the gap between the fork and the fork slot from increasing, thereby generating a large noise; and after the gap increases, the position of the blade cannot be fixed, causing the blade to jump up and down during operation, thereby reducing the flatness of the mowing; at the same time, it can also avoid the problem that due to the increase in the gap, the height adjustment of the blade cannot be realized in time when the fork moves up and down, thereby reducing the sensitivity of the height adjustment of the blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the lawn mower of the utility model from a side view;

[0015] Figure 2 It is a front perspective structural diagram of a lawn mower of the utility model;

[0016] In the figure, the housing 1, the power shaft 2, the mowing blade 3, the fork shaft 4, the fork 5, the connecting piece 6, the bearing seat 7, the sleeve 8, the connecting plate 9, the height adjustment nut 10, the rotating handle 11, the walking wheel 12, the mud guard film 13, and the discharge port baffle 14. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the embodiments.

[0018] A lawn mower comprises a housing 1, a power shaft 2 is vertically arranged in the middle of the housing 1, the lower end of the power shaft 2 extends into the housing 1 and is connected to a grass cutting blade 3; a fork shaft 4 is arranged on one side of the power shaft 2, the lower end of the fork shaft 4 extends into the housing 1 and is connected to a fork 5; the grass cutting blade 3 is connected to the lower end of the power shaft 2 by a connecting member 6 in a sliding fit and can rotate synchronously with the power shaft 2; a bearing (not shown) is sleeved on the connecting member 6, and the bearing (inner ring) is tightly fitted with the connecting member 6; one end of the fork 5 is connected to the fork shaft 4, and the other end is connected to a bearing seat 7 (or is formed with a bearing seat 7), the bearing is installed on the bearing seat 7, and the outer ring of the bearing is tightly fitted with the bearing seat 7.

[0019] Working principle: When the lawn mower is working, the power shaft 2 drives the mowing blade 3 to rotate at high speed to achieve mowing. When adjusting the height of the mowing blade 3, by moving the fork shaft 4 up and down, the fork shaft 4 drives the fork 5 to drive the bearing seat 7 to move up and down, and the bearing seat 7 drives the connecting member 6 to drive the mowing blade 3 to move up and down, that is, the height adjustment of the mowing blade 3 is achieved. The above-mentioned structure of the utility model can avoid setting the fork groove on the connecting member 6, thereby avoiding the long-term operation of the lawn mower, the wear of the fork 5 and the fork groove, the increase of the gap between the fork 5 and the fork groove, and the generation of large noise; and after the gap increases, the position of the blade cannot be fixed, so that the blade jumps up and down during operation, reducing the flatness of the mowing; at the same time, it can also avoid the problem that due to the increase in the gap, the height adjustment of the blade cannot be achieved in time when the fork 5 moves up and down, which reduces the sensitivity of the blade height adjustment.

[0020] The connecting member 6 includes a sleeve 8 and a connecting plate 9 which are formed as one body, and the grass cutting blade 3 is fixed to the connecting plate 9 by bolts. The bearing is sleeved on the sleeve 8 and is tightly matched with the sleeve 8.

[0021] In this way, by connecting the grass-cutting blade 3 via the connecting plate 9, the contact area between the connecting member 6 and the grass-cutting blade 3 can be increased, so that the installation of the grass-cutting blade 3 is more stable, and the structure is simple in design and easy to implement.

[0022] The lower end of the power shaft 2 extends into the housing 1 and is formed into a spline shaft. The sleeve 8 is provided with spline teeth matching the spline shaft and can cooperate with the spline shaft to achieve sliding connection.

[0023] In this way, the structure is simple and easy to implement, and the power shaft 2 and the connecting member 6 are conveniently connected by sliding.

[0024] The upper end of the fork shaft 4 is sleeved with a height adjustment nut 10 , which is fixedly connected to the housing 1 and threadably matched with the fork shaft 4 to achieve height adjustment.

[0025] In this way, the fork shaft 4 can be moved up and down only by rotating the fork shaft 4, so that the height of the grass cutting blade 3 can be adjusted, the structure is simple and the cost is low.

[0026] Wherein, a rotating handle 11 is provided at the upper end of the fork shaft 4 .

[0027] In this way, it is convenient to rotate the fork shaft 4 to adjust the height of the grass cutting blade 3 .

[0028] The housing 1 is provided with a running wheel 12 on the front side, a mud guard film 13 on the rear side, a discharge port on the side, and a discharge port baffle 14 above the discharge port.

[0029] In this way, the travel wheels 12 are provided to facilitate the lawn mower to travel and mow grass, thereby improving the mowing efficiency; the mud guard film 13 and the discharge port baffle 14 are provided to prevent the mud and grass brought up during the mowing process from splashing everywhere.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.

Claims

1. A lawn mower, comprising a housing, a power shaft is vertically arranged in the middle of the housing, the lower end of the power shaft extends into the housing and is connected to a lawn mower blade; a fork shaft is arranged on one side of the power shaft, the lower end of the fork shaft extends into the housing and is connected to a fork; characterized in that: The grass cutting blade is connected to the lower end of the power shaft by a connecting piece in a sliding fit, and can rotate synchronously with the power shaft; a bearing is sleeved on the connecting piece, and the bearing is tightly fitted with the connecting piece; one end of the shift fork is connected to the shift fork shaft, and the other end is connected to a bearing seat, and the bearing is installed on the bearing seat and is tightly fitted with the bearing seat.

2. The lawn mower according to claim 1, characterized in that: The connecting piece comprises a sleeve and a connecting plate which are integrally formed, and the grass cutting blade is fixed to the connecting plate by bolts.

3. The lawn mower according to claim 2, characterized in that: The lower end of the power shaft extends into the housing and is formed into a spline shaft. The sleeve is provided with spline teeth matching the spline shaft and can cooperate with the spline shaft to achieve sliding connection.

4. The lawn mower according to claim 1, characterized in that: The upper end of the shift fork shaft is sleeved with a height adjustment nut, which is fixedly connected to the housing and cooperates with the thread of the shift fork shaft to achieve height adjustment.

5. The lawn mower according to claim 4, characterized in that: A rotating handle is arranged on the upper end of the shift fork shaft.

6. The lawn mower according to claim 1, characterized in that: The front side of the shell is provided with a running wheel, the rear side is provided with a mud guard film, the side is provided with a discharge port, and a discharge port baffle is provided above the discharge port.

Images