Brake device for speed reducer of sitting type mini-tiller

Abstract

The utility model discloses a brake device for a speed reducer of a sitting type mini-tiller. The braking device comprises a clutch, a driving shaft used for being in transmission connection with the clutch, a first bearing installed on the driving shaft and connected with a rear cover of the clutch in an abutting mode, and a first friction lining installed on the driving shaft in a sliding mode. The clutch comprises an elastic part which elastically pushes the first bearing to enable the first friction bush to move towards the second friction bush. A first friction lining and a second friction lining are arranged on a driving shaft, when friction plates in a clutch are separated, an elastic piece in the clutch can elastically push a first bearing and the first friction lining to move towards the second friction lining, and when the first friction lining abuts against the second friction lining, braking friction force is formed; therefore, the driving shaft can be braked immediately, power can be cut off in time, and the braking safety of the mini-tiller is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of micro-tiller technology, specifically relating to a braking device for a seated micro-tiller reducer. Background Technology

[0002] Mini tillers are powered by small diesel or gasoline engines and are characterized by their light weight, small size, and simple structure. They are suitable for cultivating dry land, paddy fields, orchards, etc. in plains, mountains, hills, and are very popular among farmers.

[0003] Currently, in existing mini-tillers, during braking, after releasing the clutch lever, the internal spring pressure pushes the pressure cap and release bearing to move, causing the friction plates in the clutch to disengage and cut off power transmission. However, for a period of time after the friction plate pressure is released, due to the effects of oil and inertia, power is not cut off in time, and power continues to be transmitted to the transmission drive shaft, preventing the machine from stopping in time and posing a potential safety risk. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a braking device for the reducer of a seated micro-tiller, which aims to solve the technical problem that the existing reducer of a seated micro-tiller cannot stop moving in time.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a braking device for a seated micro-tiller reducer, comprising a clutch, a drive shaft for transmission connection with the clutch, a first bearing mounted on the drive shaft and abutting against the rear cover of the clutch, and a first friction bushing slidably mounted on the drive shaft and abutting against the first bearing. The drive shaft is provided with second friction bushings spaced apart from the first friction bushings to form a friction pair. The clutch includes an elastic element that elastically pushes the first bearing to move the first friction bushing toward the second friction bushing.

[0006] Furthermore, the drive shaft is also provided with a second bearing, which is located on the side of the second friction bushing opposite to the first friction bushing.

[0007] Furthermore, a retaining ring is provided inside the first friction bushing.

[0008] Furthermore, the first friction bushing is provided with a clutch fork for limiting its rotation.

[0009] Furthermore, the clutch shift fork includes a shift fork shaft spatially intersecting the axial direction of the drive shaft, and a shift fork plate disposed on the shift fork shaft and used to restrict the rotation of the first friction bushing, wherein the first friction bushing has a side surface that abuts against the shift fork plate.

[0010] Furthermore, there are two shift forks, and the first friction bushing is placed between the two shift forks. The first friction bushing is provided with two side surfaces for abutting against the two shift forks respectively.

[0011] Furthermore, the drive shaft is provided with splines, and the inner wall of the second friction bushing is provided with spline teeth that mate with the splines.

[0012] Furthermore, the outer diameter of the first friction bushing is smaller than the outer diameter of the second friction bushing.

[0013] Furthermore, the clutch fork also includes a fork lever connected to the fork shaft.

[0014] The beneficial effects of this utility model are as follows: Compared with the prior art, the braking device for the reducer of a seated micro-tiller in this utility model has a first friction bushing and a second friction bushing on the drive shaft. When the friction plates in the clutch are separated, the elastic element in the clutch can elastically push the first bearing and the first friction bushing to move towards the second friction bushing. When the first friction bushing and the second friction bushing come into contact, a braking friction force is formed, thereby enabling the drive shaft to brake immediately, realizing timely power cut-off, and enhancing the safety of micro-tiller braking.

[0015] Other advantages, objectives, and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0016] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0017] Figure 1 This is a first-view structural schematic diagram of a braking device for a reducer of a seated micro-tiller, according to an embodiment of the present invention.

[0018] Figure 2 This is a second-view structural schematic diagram of a braking device for a reducer of a seated micro-tiller, according to an embodiment of the present invention.

[0019] Figure 3This is a third-view structural schematic diagram of a braking device for a reducer of a seated micro-tiller, according to an embodiment of the present invention.

[0020] Figure 4 This is a partial structural schematic diagram of a braking device for a seated micro-tiller reducer according to an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of the drive shaft and the second friction bushing according to an embodiment of the present invention.

[0022] Icon labels:

[0023] 1-Clutch; 11-Rear cover; 12-Elastic element;

[0024] 2-Drive shaft; 21-Spline;

[0025] 3-First bearing;

[0026] 4-First friction bushing; 41-Circlip; 42-Side side;

[0027] 5-Second friction bushing; 51-Spline tooth;

[0028] 6-Second bearing;

[0029] 7-Clutch shift fork; 71-Shift fork shaft; 72-Shift fork plate; 73-Shift fork lever. Detailed Implementation

[0030] like Figures 1 to 5As shown, this embodiment proposes a braking device for a seated micro-tiller reducer, including a clutch 1 and a drive shaft 2. The drive shaft 2 is connected to the output end of the clutch 1. A first bearing 3 is mounted on the drive shaft 2, and the first bearing 3 abuts against the rear cover 11 of the clutch 1. In addition, the drive shaft 2 is also provided with a first friction bushing 4 and a second friction bushing 5. The first friction bushing 4 is slidably mounted on the drive shaft 2 and abuts against the first bearing 3. The second friction bushing 5 is spaced apart from the first friction bushing 4 and rotates synchronously with the drive shaft 2. The first friction bushing 4 and the second friction bushing 5 can cooperate to form a friction pair. Furthermore, the clutch 1 includes an elastic element 12, which can elastically push the first bearing 3 to move the first friction bushing 4 toward the second friction bushing 5. The drive shaft 2 is equipped with a first friction bushing 4 and a second friction bushing 5. When the friction plates in the clutch 1 are separated, the elastic element 12 in the clutch can elastically push the first bearing 3 and the first friction bushing 4 toward the second friction bushing 5. When the first friction bushing 4 and the second friction bushing 5 come into contact, a braking friction force is formed, which enables the drive shaft 2 to brake immediately, realize timely power cut-off, and enhance the safety of the micro-tiller braking.

[0031] Further, please refer to Figure 1 and Figure 2 As shown, the drive shaft 2 is also provided with a second bearing 6, which is located on the side of the second friction bushing 5 that faces away from the first friction bushing 4. In this way, by providing the second bearing 6, the movement of the second friction bushing 5 can be better restricted, which is conducive to achieving better contact between the first friction bushing 4 and the second friction bushing 5, thereby improving its braking effect.

[0032] Further, please refer to Figure 1 As shown, the first friction bushing 4 is provided with a retaining spring 41. By providing the retaining spring 41, the first friction bushing 4 can be supported and fixed, preventing the first friction bushing 4 from rotating. Of course, in this application, other locking components such as spring clips can also be provided to lock and fix the first friction bushing 4 according to the actual situation and specific needs; this is not the only limitation.

[0033] Further, please refer to Figure 1 As shown, the first friction bushing 4 is provided with a clutch fork 7. The clutch fork 7 can restrict the rotation of the first friction bushing 4.

[0034] In this application, when the friction plates in the clutch disengage, the first friction bushing 4 cannot rotate due to the restraining effect of the clutch fork 7 and the snap ring 41. At the same time, the elastic element pushes the first bearing 3 and the first friction bushing 4 to move towards the second friction bushing 5, so that the first friction bushing 4 and the second friction bushing 5 come close together, thereby generating friction between the end face of the first friction bushing 4 and the end face of the second friction bushing 5. The first friction bushing 4 is circumferentially fixed and cannot rotate, while the second friction bushing 5 connected to the drive shaft will stop rotating due to the force generated by the friction, thereby forcing the drive shaft 2 to stop rotating immediately, achieving the effect of immediate braking.

[0035] Further, please refer to Figure 1 As shown, the clutch shift fork 7 includes a shift fork shaft 71 and a shift fork plate 72. The shift fork shaft 71 is spatially intersecting the axial direction of the drive shaft 2. The shift fork plate 72 is disposed on the shift fork shaft 71, and the first friction bushing 4 has a side surface that abuts against the shift fork plate 72. Thus, the rotation of the first friction bushing 4 can be restricted by the shift fork plate 72. Preferably, there are two shift fork plates 72, and the first friction bushing 4 is placed between the two shift fork plates 72. The first friction bushing 4 has two side surfaces 42, which can respectively abut against the two shift fork plates 72. Thus, the rotation of the first friction bushing 4 can be effectively restricted by the abutting action of the two shift fork plates 72 on both sides.

[0036] Further, please refer to Figure 4 and Figure 5 As shown, the drive shaft 2 is provided with a spline 21, and the inner wall of the second friction bushing 5 is provided with spline teeth 51 that mate with the spline 21. Through the mating connection of the spline 21 and the spline teeth 51, the second friction bushing 5 and the drive shaft 2 can be ensured to rotate synchronously. Thus, when friction is generated between the end face of the first friction bushing 4 and the end face of the second friction bushing 5, the second friction bushing 5, under the action of the spline 21 and the spline teeth 51, will stop the drive shaft 2 from rotating, achieving an immediate braking effect and improving the safety of the micro-tiller's braking.

[0037] Furthermore, the outer diameter of the first friction bushing 4 is smaller than the outer diameter of the second friction bushing 5. This increases the attachment area of ​​the first friction bushing 4, which is beneficial for the first friction bushing 4 to fully attach to the second friction bushing 5, thereby enhancing the friction between the first friction bushing 4 and the second friction bushing 5, and thus achieving better braking of the drive shaft 2.

[0038] Further, please refer to Figure 1 As shown, the clutch shift fork 7 also includes a shift fork lever 73, which is connected to the shift fork shaft 71. By providing the shift fork lever 73, the shift fork lever 73 can be manually adjusted, thereby enabling the position adjustment of the shift fork shaft 71.

[0039] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A braking device for a reducer of a seated micro-tiller, characterized in that, The clutch includes a clutch, a drive shaft for transmission connection with the clutch, a first bearing mounted on the drive shaft and abutting against the rear cover of the clutch, and a first friction bushing slidably mounted on the drive shaft and abutting against the first bearing. The drive shaft is provided with second friction bushings spaced apart from the first friction bushings to form a friction pair. The clutch includes an elastic element that elastically pushes the first bearing to move the first friction bushing toward the second friction bushing.

2. The braking device for a seated micro-tiller reducer according to claim 1, characterized in that, The drive shaft is also provided with a second bearing, which is located on the side of the second friction bushing opposite to the first friction bushing.

3. A braking device for a seated micro-tiller reducer according to claim 1, characterized in that, The first friction bushing is equipped with a retaining spring.

4. A braking device for a seated micro-tiller reducer according to claim 2, characterized in that, The first friction bushing is provided with a clutch fork to limit its rotation.

5. A braking device for a seated micro-tiller reducer according to claim 3, characterized in that, The clutch shift fork includes a shift fork shaft spatially intersecting the axial direction of the drive shaft, and a shift fork plate disposed on the shift fork shaft and used to restrict the rotation of the first friction bushing. The first friction bushing has a side surface that abuts against the shift fork plate.

6. A braking device for a seated micro-tiller reducer according to claim 5, characterized in that, The number of shift forks is two, and the first friction bushing is placed between the two shift forks. The first friction bushing is provided with two side surfaces for abutting against the two shift forks respectively.

7. A braking device for a seated micro-tiller reducer according to claim 1, characterized in that, The drive shaft is provided with splines, and the inner wall of the second friction bushing is provided with spline teeth that mate with the splines.

8. A braking device for a seated micro-tiller reducer according to claim 1, characterized in that, The outer diameter of the first friction bushing is smaller than the outer diameter of the second friction bushing.

9. A braking device for a seated micro-tiller reducer according to claim 5, characterized in that, The clutch fork also includes a fork lever connected to the fork shaft.

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