Gear box structure for brush cutter

Abstract

The gear box structure comprises a gear box shell assembly, a driving gear shaft and a driven gear shaft, the gear box shell assembly is formed by fastening, connecting and fixing a left gear box shell and a right gear box shell through bolts, the driving gear shaft is rotatably connected in the gear box shell assembly, and the driven gear shaft is connected in the gear box shell assembly. A copper sleeve is further embedded in the gearbox shell assembly, and the driven gear shaft is rotatably connected into the copper sleeve. The utility model has the advantages that the structure is simple, the manufacturing cost is reduced, the production efficiency is improved, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of brush cutter technology, and specifically to a gearbox structure for a brush cutter. Background Technology

[0002] A brush cutter is a machine used for mowing grass and branches, primarily for landscaping maintenance, clearing shrubs from forests, or tending large green belts along roadsides. It is characterized by its small size, light weight, and ease of operation, making it suitable for various environments such as home gardens, fields, and mountains.

[0003] The gearboxes of existing gasoline brush cutters and electric brush cutters, such as Figure 1 As shown, the gearbox housing is machined as a whole, and then the bearings and gears are press-fitted into the interior. However, this structure has high housing machining costs, poor concentricity control, and requires tooling equipment for bearing press-fitting. Poor press-fitting can damage the bearings and reduce the life of the gearbox. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a gearbox structure for a brush cutter, which is simple in structure, reduces manufacturing costs, improves production efficiency, and extends service life.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A gearbox structure for a brush cutter includes a gearbox housing assembly, a drive gear shaft, and a driven gear shaft. The gearbox housing assembly is fixedly connected by bolts between a left gearbox housing and a right gearbox housing. The drive gear shaft is rotatably connected inside the gearbox housing assembly. A copper sleeve is also embedded inside the gearbox housing assembly, and the driven gear shaft is rotatably connected inside the copper sleeve.

[0007] A further technical solution is that a first bearing and a second bearing are installed inside the left gearbox housing and the right gearbox housing. The driving gear shaft is rotatably connected in the first bearing, and the driven gear shaft is rotatably connected in the second bearing. The first bearing and the second bearing mainly bear the rotation of the driving gear shaft and the driven gear shaft inside the left gearbox housing and the right gearbox housing.

[0008] A further technical solution is that the driving gear shaft and the driven gear shaft are meshed together, and power transmission is achieved through the meshing of gears on the driving gear shaft and the driven gear shaft.

[0009] A further technical solution is that a notch 1 is distributed on one side of the copper sleeve, and a notch 2 is distributed inside the left gearbox housing and the right gearbox housing at the copper sleeve installation location. When the copper sleeve is embedded in the left gearbox housing and the right gearbox housing, the notch 1 on the copper sleeve and the notch 2 inside the left gearbox housing and the right gearbox housing cooperate with each other, so that the copper sleeve is embedded in the left gearbox housing and the right gearbox housing and cannot rotate, so as not to loosen after long-term use and rotate together with the driven gear shaft.

[0010] The beneficial effects of this utility model are as follows: This utility model provides a gearbox structure for a brush cutter, which splits the gearbox housing assembly into two parts: a left gearbox housing and a right gearbox housing. By directly controlling the dimensions from the mold, the processing difficulty is solved and the cost is reduced. Furthermore, the bearings installed in it are replaced with copper bushings, which not only eliminates the need for tooling equipment but also solves the problem of poor pressing, greatly improving product quality, increasing efficiency, and reducing costs. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is an exploded view of the original gearbox used in brush cutters;

[0013] Figure 2 This is an exploded view of a gearbox structure for a brush cutter according to the present invention;

[0014] Figure 3 This utility model Figure 2 An enlarged schematic diagram of point A in the middle;

[0015] Figure 4 This is a schematic diagram of the copper sleeve in a gearbox structure for a brush cutter according to the present invention;

[0016] Figure 5 This is a cross-sectional view of a gearbox structure for a brush cutter according to the present invention;

[0017] Figure 6 This is a schematic diagram showing the left and right gearbox housings of a gearbox structure for a brush cutter during installation using bolts.

[0018] Figure 1-6 In the middle: 1-drive gear shaft, 2-gearbox housing assembly, 3-first bearing, 4-copper sleeve, 5-driven gear shaft, 6-second bearing, 7-oil groove, 21-left gearbox housing, 22-right gearbox housing. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0020] See Figures 2 to 6 As shown, a gearbox structure for a brush cutter includes a gearbox housing assembly, a drive gear shaft 3, and a driven gear shaft 5. The gearbox housing assembly is fastened and fixed by a left gearbox housing 1 and a right gearbox housing 2 through bolts 7. The drive gear shaft 3 is rotatably connected inside the gearbox housing assembly. A copper sleeve 4 is also embedded inside the gearbox housing assembly 2, and the driven gear shaft 5 is rotatably connected inside the copper sleeve 4.

[0021] The left gearbox housing 1 and the right gearbox housing 2 are also equipped with a first bearing 10 and a second bearing 6. The driving gear shaft 3 is rotatably connected to the first bearing 10, and the driven gear shaft 5 is rotatably connected to the second bearing 6. The first bearing 10 and the second bearing 6 mainly bear the rotation of the driving gear shaft 3 and the driven gear shaft 5 within the left gearbox housing 1 and the right gearbox housing 2. The driving gear shaft 3 and the driven gear shaft 5 are meshed together, and power transmission is achieved through the meshing of the gears on the driving gear shaft 3 and the driven gear shaft 5. A notch 8 is distributed on one side of the copper sleeve 4, and a notch 9 is distributed at the installation location of the copper sleeve 4 within the left gearbox housing 1 and the right gearbox housing 2. When the copper sleeve 4 is embedded within the left gearbox housing 1 and the right gearbox housing 2, the notch 8 on the copper sleeve 4 cooperates with the notch 9 in the left gearbox housing 1 and the right gearbox housing 2, preventing the copper sleeve 4 from rotating within the left gearbox housing 1 and the right gearbox housing 2, thus preventing it from loosening over time and rotating together with the driven gear shaft 5.

[0022] In this embodiment, the top end of the driven gear shaft 5 is housed within the copper sleeve 4 inside the gearbox housing assembly to achieve rotation, and its other end is connected to the second bearing 6. The driving gear shaft 1 is connected to the power output end of the brush cutter, and the bottom end of the driven gear shaft 5 is connected to the brush cutter head. The brush cutter head is equipped with a blade or saw blade or other cutting tools. When the driving gear shaft 1 is driven to rotate by the power output end, it meshes with the driven gear shaft 5, thereby driving the driven gear shaft 5 to rotate and driving the brush cutter head to rotate for operation.

[0023] The above embodiments are merely examples of this utility model and are not intended to limit the implementation and scope of this utility model. All technical solutions that are the same as or equivalent to the contents described in the claims of this utility model should be included within the protection scope of this utility model.

Claims

1. A gearbox structure for a brush cutter, characterized in that: The gearbox housing assembly includes a gearbox housing assembly, a drive gear shaft, and a driven gear shaft. The gearbox housing assembly is fixed by bolts connecting a left gearbox housing and a right gearbox housing. The drive gear shaft is rotatably connected inside the gearbox housing assembly. A copper sleeve is also embedded inside the gearbox housing assembly, and the driven gear shaft is rotatably connected inside the copper sleeve.

2. The gearbox structure for a brush cutter according to claim 1, characterized in that: The left and right gearbox housings are also equipped with a first bearing and a second bearing. The driving gear shaft is rotatably connected to the first bearing, and the driven gear shaft is rotatably connected to the second bearing.

3. The gearbox structure for a brush cutter according to claim 1, characterized in that: The driving gear shaft and the driven gear shaft are meshed together.

4. The gearbox structure for a brush cutter according to claim 1, characterized in that: One notch is distributed on one side of the copper sleeve, and another notch is distributed inside the left and right gearbox housings at the copper sleeve mounting location.

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