Brake device of mini-tiller

Abstract

The utility model provides a brake device of a mini-tiller. The brake device of the mini-tiller solves the problem that an existing mini-tiller does not have an emergency stop function. The fixed disc is fixed on a box body of the mini-tiller, the brake disc is sleeved on a rotary shaft of the mini-tiller in a sliding manner, the shifting fork is used for driving the brake disc to move axially, the fixed disc and the rotary shaft of the mini-tiller are coaxially arranged, the brake disc and the rotary shaft of the mini-tiller are in circumferential limiting fit, and one side, facing the fixed disc, of the brake disc is provided with a first friction surface; the side, facing the brake disc, of the fixed disc is provided with a second friction face, and the first friction face is tightly attached to the second friction face during braking. The brake device is simple and compact in structure, small in occupied space, convenient to assemble and replace and low in cost, friction force between the brake disc and the fixed disc is large, a good brake effect can be achieved, and application and popularization are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of micro-tillage machines and relates to a brake device for a micro-tillage machine. Background Art

[0002] The micro-tillage machine is powered by a small diesel engine or gasoline engine, and has the characteristics of light weight, small size, simple structure, etc. The micro-tillage machine is widely used in dry land, paddy fields, orchards, etc. in plains, mountainous areas, and hills. It can be equipped with corresponding equipment for pumping, power generation, spraying, and spraying. It can also be towed by a trailer for short-distance transportation. The micro-tillage machine can be used freely in the field, which is convenient for users to use and store, eliminating the trouble that large agricultural machinery cannot enter the mountain fields. It is the best choice for farmers and consumers to replace cattle plowing.

[0003] Existing micro-tillage machines do not have the function of emergency brake stop during operation. In case of an accident, the inertia of the micro-tillage machine can only be overcome by manpower to stop it. Once it is on an uneven ground, a steep slope or there is an obstacle during movement, it is laborious to stop the micro-tillage machine urgently and it is easy to collide with the obstacle, which has low safety. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a micro-tillage machine brake device with simple structure.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The micro-tiller braking device comprises a fixed plate fixed on a micro-tiller housing, a brake plate slidably sleeved on a rotating shaft of the micro-tiller, and a shift fork for driving the brake plate to move axially, wherein the fixed plate is coaxially arranged with the rotating shaft of the micro-tiller, the brake plate is circumferentially limited with the rotating shaft of the micro-tiller, the brake plate has a first friction surface on a side facing the fixed plate, and the fixed plate has a second friction surface on a side facing the brake plate, and the first friction surface is in close contact with the second friction surface when braking.

[0007] When braking is needed, the shift fork drives the brake disc close to the fixed disc, so that the first friction surface is close to the second friction surface. Since the second friction surface is fixed, the friction force can slow down or prevent the rotation of the brake disc, thereby limiting the rotation of the micro-tiller shaft and achieving the purpose of braking.

[0008] In the above-mentioned micro-tiller brake device, the fixed plate has an axial hole, a first bearing is installed in the axial hole, one end of the micro-tiller shaft close to the fixed plate is supported in the first bearing, and a second bearing and a third bearing are provided between the micro-tiller shaft and the micro-tiller housing.

[0009] The stability of the micro-tiller shaft is improved by the first bearing, the second bearing and the third bearing. Since one end of the micro-tiller shaft penetrates into the fixed disk, the brake disk will not separate from the micro-tiller shaft when the first friction surface is tightly attached to the second friction surface.

[0010] In the above-mentioned micro-tiller brake device, a spline hole is coaxially provided on the brake disc, and a spline shaft matching the spline hole is provided on the micro-tiller rotating shaft.

[0011] In the above-mentioned micro-tiller brake device, the spline hole has a mounting hole at one end close to the fixed plate, and a compression spring sleeved on the micro-tiller shaft is installed in the mounting hole, and one end of the compression spring abuts against the inner ring of the first bearing.

[0012] When the shift fork is released, the compression spring allows the brake disc to quickly detach from the fixed disc.

[0013] In the above-mentioned micro-tiller brake device, a thrust bearing is coaxially provided on the brake disc, and the shift fork acts on a side of the thrust bearing away from the fixed disc.

[0014] The brake disc rotates with the micro-tiller's shaft. The setting of the thrust bearing greatly reduces the friction between the fork and the brake disc, thereby increasing the service life.

[0015] In the above-mentioned micro-tiller brake device, a plurality of friction plates distributed in a circular array along the center line of the brake disc are provided on the side of the brake disc facing the fixed disc, and the length direction of the friction plates extends radially along the brake disc, and the side of the plurality of friction plates facing the fixed disc constitutes the above-mentioned first friction surface.

[0016] In the above-mentioned micro-tiller brake device, the second friction surface is provided with a plurality of friction lines and / or pits for increasing friction.

[0017] By providing the friction plate, friction patterns and / or pits, the friction between the brake disc and the fixed disc is increased, thereby achieving a better braking effect.

[0018] Compared with the prior art, the micro-tillage machine brake device has the following advantages:

[0019] The brake device has a simple and compact structure, occupies little space, is easy to assemble and replace, has low cost, has large friction between the brake disc and the fixed disc, can achieve a good braking effect, and is conducive to promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the tiller brake device when it is installed on the travel box.

[0021] Figure 2 yes Figure 1 Cross-sectional view of the middle structure.

[0022] Figure 3 It is a cross-sectional view of the brake device of the micro-tillage machine.

[0023] In the figure, 1, travel box; 2, vertical shaft; 3, fixed plate; 4, brake disc; 5, shift fork; 6, first bearing; 7, second bearing; 8, spline shaft; 9, compression spring; 10, thrust bearing; 11, friction plate; 12, third bearing. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] The micro-tiller braking device is arranged between the housing of the micro-tiller and the rotating shaft of the micro-tiller. In this embodiment, the housing of the micro-tiller is a traveling housing 1, and the rotating shaft of the micro-tiller is a vertical shaft 2.

[0026] like Figure 1 and Figure 2 The micro-tiller brake device shown includes a fixed plate 3 fixed in a travel box 1, a brake plate 4 slidably sleeved on a vertical shaft 2, and a shift fork 5 for driving the brake plate 4 to move axially. The fixed plate 3 is coaxially arranged with the vertical shaft 2, and has an axial hole, in which a first bearing 6 is installed. One end of the vertical shaft 2 close to the fixed plate 3 is supported in the first bearing 6, and a second bearing 7 and a third bearing 12 are provided between the vertical shaft 2 and the travel box 1. The stability of the vertical shaft 2 is improved by the first bearing 6, the second bearing 7 and the third bearing 12. Since one end of the vertical shaft 2 penetrates into the fixed plate 3, the brake plate 4 will not separate from the vertical shaft 2 when the first friction surface is in close contact with the second friction surface.

[0027] like Figure 2 and Figure 3 As shown, a spline hole is coaxially provided on the brake disc 4, and a spline shaft 8 matching with the spline hole is provided on the vertical shaft 2, and the two cooperate to achieve circumferential limitation of the brake disc 4 and the vertical shaft 2.

[0028] like Figure 3 As shown, one end of the spline hole close to the fixed plate 3 has a mounting hole, in which a compression spring 9 sleeved on the vertical shaft 2 is installed, and one end of the compression spring 9 abuts against the inner ring of the first bearing 6. When the shift fork 5 is released, the compression spring 9 can quickly separate the brake disc 4 from the fixed plate 3.

[0029] like Figure 2 and Figure 3 As shown, a thrust bearing 10 is coaxially arranged on the brake disc 4, and the shift fork 5 acts on the side of the thrust bearing 10 away from the fixed disc 3. The brake disc 4 rotates together with the vertical shaft 2, and the provision of the thrust bearing 10 greatly reduces the friction between the shift fork 5 and the brake disc 4, thereby increasing the service life.

[0030] In this embodiment, the side of the brake disc 4 facing the fixed disc 3 has a first friction surface, and the side of the fixed disc 3 facing the brake disc 4 has a second friction surface. When braking, the first friction surface is in close contact with the second friction surface. When braking is required, the shift fork 5 drives the brake disc 4 to approach the fixed disc 3, so that the first friction surface is in close contact with the second friction surface. Since the second friction surface is fixed, the friction force can slow down or prevent the rotation of the brake disc 4, thereby limiting the rotation of the vertical shaft 2 and achieving the purpose of braking.

[0031] like Figure 3 As shown, a plurality of friction plates 11 are arranged in an annular array along the center line of the brake disc 4 on the side facing the fixed disc 3, and the length direction of the friction plates 11 extends radially along the brake disc 4. The side of the plurality of friction plates 11 facing the fixed disc 3 constitutes the first friction surface. In order to increase friction, a plurality of friction lines and / or pits are arranged on the second friction surface, thereby improving the braking effect.

[0032] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A micro-tillage machine brake device, characterized in that: The invention comprises a fixed disc (3) fixed on a micro-tiller housing, a brake disc (4) slidably sleeved on a rotating shaft of the micro-tiller, and a shift fork (5) for driving the brake disc (4) to move axially, wherein the fixed disc (3) is coaxially arranged with the rotating shaft of the micro-tiller, the brake disc (4) is circumferentially limited with the rotating shaft of the micro-tiller, the brake disc (4) has a first friction surface on the side facing the fixed disc (3), and the fixed disc (3) has a second friction surface on the side facing the brake disc (4), and the first friction surface is in close contact with the second friction surface when braking.

2. The micro-tillage machine brake device according to claim 1, characterized in that: The fixed plate (3) has an axial hole, a first bearing (6) is installed in the axial hole, and one end of the micro-tillage machine shaft close to the fixed plate (3) is supported in the first bearing (6).

3. The micro-tillage machine brake device according to claim 2, characterized in that: The brake disc (4) is coaxially provided with a spline hole, and the micro-tillage machine shaft is provided with a spline shaft (8) that matches the spline hole.

4. The micro-tillage machine brake device according to claim 3, characterized in that: One end of the spline hole close to the fixed plate (3) has a mounting hole, in which a compression spring (9) sleeved on the rotating shaft of the micro-tiller is installed, and one end of the compression spring (9) abuts against the inner ring of the first bearing (6).

5. The micro-tillage machine brake device according to claim 1, characterized in that: A thrust bearing (10) is coaxially arranged on the brake disc (4), and the shift fork (5) acts on a side of the thrust bearing (10) away from the fixed disc (3).

6. The micro-tillage machine brake device according to claim 1, characterized in that: A plurality of friction plates (11) are arranged on the side of the brake disc (4) facing the fixed disc (3) in a circular array along the center line of the brake disc (4), and the length direction of the friction plates (11) extends radially along the brake disc (4). The side of the plurality of friction plates (11) facing the fixed disc (3) constitutes the above-mentioned first friction surface.

7. The micro-tillage machine brake device according to claim 1, characterized in that: The second friction surface is provided with a plurality of friction lines and / or pits for increasing friction.

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