Steering shifting fork structure of mini-tiller

Abstract

The steering shifting fork structure comprises a shifting fork shaft, a steering shifting fork and a blocking cover, the shifting fork shaft comprises a shifting fork shaft body, the steering shifting fork is installed on the shifting fork shaft body and connected with a steering gear in a clamped mode, one end of the shifting fork shaft body is provided with a rotating shaft head, the rotating shaft head is rotatably inserted into a blind hole formed in one side in a gearbox body, and the rotating shaft head is connected with the steering gear in a clamped mode. An extending shaft body is arranged at the other end of the shifting fork shaft body and extends out of a through hole formed in the other side of the gearbox body, a framework oil seal is installed in the through hole, a blocking cover is arranged on the extending shaft body in a penetrating and sleeving mode and fixedly connected with the gearbox body through a bolt, and the shifting fork shaft body is limited in the gearbox body through the blocking cover. The body end of the extending shaft is connected with a swing arm used for being connected with a steering stay wire. The steering shifting fork structure of the mini-tiller is ingenious in arrangement, the arranged sealing piece is not prone to damage, and replacement and maintenance are convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of micro-tillers, specifically a steering fork structure for a micro-tiller. Background Technology

[0002] Before planting crops and cash crops, the land needs to be prepared through tillage. Traditional farmland preparation involves using livestock such as oxen and horses to plow and harrow, which is inefficient, labor-intensive, requires dedicated personnel to raise the oxen and horses, and is costly. With the development of science and technology and the increasing economic strength of my country, agriculture has also developed rapidly. Various agricultural machinery products are now used in countless households. Their development has saved labor, greatly improved labor efficiency, and promoted agricultural development.

[0003] Mini tillers are powered by small diesel or gasoline engines and are characterized by their light weight, small size, and simple structure. They are widely applicable to dry land, paddy fields, and orchards in plains, mountains, and hills. Because of their lightweight design, mini tillers can move freely in the fields, making them easy for users to operate and store. They eliminate the problem of large agricultural machinery being unable to access mountainous fields, making them the best alternative to oxen for farmers.

[0004] To improve the maneuverability of rotary tillers, most are equipped with a steering mechanism. A common steering mechanism for rotary tillers involves a steering lever pulling a steering arm on the steering fork shaft to disengage the steering gear from the central drive gear. The meshing methods of the steering gear and central drive gear are mainly jaw clutch type and internal / external gear clutch type. In the aforementioned steering mechanism, both ends of the steering fork shaft pass through the gearbox housing. One end of the steering fork shaft is limited by a mounting nut, and the other end fixes the steering arm. An O-ring seal is installed between the steering fork shaft and the gearbox housing. This seal only prevents gear oil from leaking out of the gearbox housing, but it cannot prevent mud, water, and dust from entering the fork hole of the gearbox housing. If the machine is not used for a period of time, the steering fork and the steering fork hole in the gearbox housing will rust together, causing the steering to become impossible or sluggish. It can also easily damage the O-ring seal, leading to oil leaks and inconvenient replacement and maintenance. Therefore, it is necessary to design a steering fork structure for rotary tillers that is less prone to seal damage and easier to replace and maintain. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the prior art by providing a steering fork structure for a mini tiller. The seals of this steering fork structure are not easily damaged and are easy to replace and maintain.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A steering fork structure for a micro-tiller includes a fork shaft, a steering fork, and a cover. The fork shaft includes a fork shaft body, and the steering fork is mounted on the fork shaft body and engaged with a steering gear. One end of the fork shaft body is provided with a rotating shaft head, which is rotatably inserted into a blind hole provided on one side of the gearbox body. The other end of the fork shaft body is provided with an extended shaft body, which extends out from a through hole provided on the other side of the gearbox body. A skeleton oil seal is installed in the through hole. The cover is sleeved on the extended shaft body and connected and fixed to the gearbox body by bolts. The diameter of the through hole provided on the cover is smaller than the diameter of the fork shaft body. The cover limits the fork shaft body in the gearbox body and limits the skeleton oil seal in the through hole. The extended shaft body end is connected to a swing arm for connecting with a steering cable.

[0008] A further preferred embodiment: The steering fork includes a sliding sleeve and a fork head. The fork head is fixedly mounted on the sliding sleeve, which has an insertion limiting hole for the fork shaft to pass through. A flat shaft is fitted onto the fork shaft. After passing through the insertion limiting hole, the flat shaft of the fork shaft can only slide axially and cannot rotate around the fork shaft. When the steering cable pulls the swing arm to swing, it drives the fork shaft to drive the steering fork to separate the steering gear from the central transmission gear.

[0009] A further preferred embodiment: the swing arm is fixedly welded to the extension shaft. When welding the swing arm to the extension shaft, the cover must first be slipped onto the extension shaft to prevent the cover from being unable to be slipped onto the extension shaft due to the restriction of the shift fork shaft and the swing arm after the swing arm is fixedly welded to the extension shaft.

[0010] A further preferred embodiment: the outer end of the protruding shaft is provided with a threaded shaft head, and the swing arm is mounted on the threaded shaft head and locked by a lock nut.

[0011] The steering fork structure of this mini-tiller has the following advantages:

[0012] 1. The steering fork structure of this mini tiller has a rotating shaft head at one end of the fork shaft. The rotating shaft head is inserted into a blind hole on one side of the gearbox body, eliminating the need for a through hole, thus reducing the need for sealing rings and avoiding oil leakage caused by through holes. The other end of the fork shaft has an extended shaft body that extends from a through hole on the other side of the gearbox body. A skeleton oil seal is installed in the through hole. A cover is fitted onto the extended shaft body and fixed to the gearbox body with bolts. The through hole on the cover has a smaller diameter than the diameter of the fork shaft body. The cover limits the fork shaft body to the gearbox body. The skeleton oil seal provides good sealing performance and is easy to replace.

[0013] 2. The fork head of the steering fork is fixedly mounted on the sliding sleeve. The sliding sleeve is provided with an insertion limiting hole for the fork shaft to pass through. The fork shaft is provided with a flat shaft body. After the flat shaft body of the fork shaft passes through the insertion limiting hole, it can only slide axially and cannot rotate around the fork shaft body. The fork shaft can be inserted after the steering fork is engaged with the steering gear. The assembly and disassembly are convenient and quick. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the steering fork structure of the micro-tiller in Example 1;

[0015] Figure 2 This is a schematic diagram of the shift fork shaft in Embodiment 1;

[0016] Figure 3 yes Figure 2 Schematic diagram of the AA section;

[0017] Figure 4 This is a schematic diagram of the steering fork structure of the micro-tiller in Example 2;

[0018] Figure 5 This is a schematic diagram of the shift fork shaft in Embodiment 2;

[0019] Figure 6 This is a schematic diagram of the steering shift fork;

[0020] Figure 7 yes Figure 6 A left-view diagram;

[0021] The names corresponding to the serial numbers in the figure are:

[0022] 1. Gearbox body; 2. Blind hole; 3. Rotating shaft head; 4. Flat shaft body; 5. Shift fork shaft body; 6. Steering shift fork; 7. Steering gear; 8. Through hole; 9. Skeleton oil seal; 10. Cover; 11. Extending shaft body; 12. Threaded shaft head; 13. Locking nut; 14. Swing arm; 15. Bolt; 16. Sliding sleeve; 17. Shift fork head; 18. Through-limiting hole. Detailed Implementation

[0023] To provide a more detailed description of this utility model, the following description, in conjunction with the embodiments and accompanying drawings, will further illustrate this utility model. Example 1

[0024] A steering fork structure for a micro-tiller includes a fork shaft, a steering fork 6, and a cover 10. The fork shaft includes a fork shaft body 5. The steering fork 6 is mounted on the fork shaft body 5 and engages with a steering gear 7. One end of the fork shaft body 5 is provided with a rotating shaft head 3, which is rotatably inserted into a blind hole 2 provided on one side of the gearbox body 1. The other end of the fork shaft body 5 is provided with an extended shaft body 11, which extends out from a through hole 8 provided on the other side of the gearbox body 1. A skeleton oil seal 9 is installed in the through hole 8. The cover 10 is sleeved on the extended shaft body 11 and connected and fixed to the gearbox body 1 by bolts 15. The cover 10 limits the fork shaft body 5 within the gearbox body 1. The outer end of the extended shaft body 11 is provided with a threaded shaft head 12, and a swing arm 14 is mounted on the threaded shaft head 12 and locked by a lock nut 13. The threaded shaft head 12 is provided with a flat shaft body, and the rocker arm 14 is provided with a corresponding flat hole to prevent the rocker arm 14 from rotating relative to the threaded shaft head 12.

[0025] The steering fork 6 includes a sliding sleeve 16 and a fork head 17. The fork head 17 is fixedly mounted on the sliding sleeve 16. The sliding sleeve 16 is provided with an insertion limiting hole 18 for the fork shaft 5 to pass through. A flat shaft body 4 is provided on the fork shaft 5. After the flat shaft body 4 of the fork shaft 5 passes through the insertion limiting hole 18, it can only slide axially and cannot rotate around the fork shaft 5. When the steering cable pulls the swing arm 14 to swing, it drives the fork shaft 5 to drive the steering fork 6 to separate the steering gear 7 from the central transmission gear.

[0026] During installation, after engaging the steering fork 6 with the steering gear 7, the rotating shaft head 3 of the fork shaft body 5 is passed through the through hole 8, the insertion limiting hole 18 of the sliding sleeve 16, and finally inserted into the blind hole 2. Next, the skeleton oil seal 9 is adjusted and installed in the through hole 8. Then, the cover 10 is inserted onto the protruding shaft body 11, and the bolts 15 are tightened to connect and fix the cover 10 to the gearbox body 1. Finally, the rocker arm 14 is inserted onto the threaded shaft head 12, and the locking nut 13 is tightened to lock the rocker arm 14, thus completing the installation. Example 2

[0027] A steering fork structure for a micro-tiller includes a fork shaft, a steering fork 6, and a cover 10. The fork shaft includes a fork shaft body 5. The steering fork 6 is mounted on the fork shaft body 5 and engages with a steering gear 7. One end of the fork shaft body 5 is provided with a rotating shaft head 3, which is rotatably inserted into a blind hole 2 provided on one side of the gearbox body 1. The other end of the fork shaft body 5 is provided with an extended shaft body 11, which extends out from a through hole 8 provided on the other side of the gearbox body 1. A skeleton oil seal 9 is installed in the through hole 8. The cover 10 is sleeved on the extended shaft body 11 and connected and fixed to the gearbox body 1 by bolts 15. The cover 10 limits the fork shaft body 5 within the gearbox body 1. A swing arm 14 for connecting with a steering cable is fixedly welded to the extended shaft body 11.

[0028] The steering fork 6 includes a sliding sleeve 16 and a fork head 17. The fork head 17 is fixedly mounted on the sliding sleeve 16. The sliding sleeve 16 is provided with an insertion limiting hole 18 for the fork shaft 5 to pass through. A flat shaft body 4 is provided on the fork shaft 5. After the flat shaft body 4 of the fork shaft 5 passes through the insertion limiting hole 18, it can only slide axially and cannot rotate around the fork shaft 5. When the steering cable pulls the swing arm 14 to swing, it drives the fork shaft 5 to drive the steering fork 6 to separate the steering gear 7 from the central transmission gear.

[0029] During installation, install the skeleton oil seal 9 on the shift fork shaft 5, engage the steering shift fork 6 with the steering gear 7, then pass the rotating shaft head 3 of the shift fork shaft 5 through the through hole 8 and the insertion limiting hole 18 of the sliding sleeve 16 in sequence, and finally insert it into the blind hole 2. Adjust and install the skeleton oil seal 9 in the through hole 8, and then tighten the bolt 15 to connect and fix the cover 10 to the gearbox body 1, thus completing the installation.

[0030] The above description is not intended to limit the present utility model, nor is the present utility model limited to the above examples. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A steering fork structure for a micro-tiller, comprising a fork shaft, a steering fork (6), and a cover (10), characterized in that: The shift fork shaft includes a shift fork shaft body (5), a steering shift fork (6) is mounted on the shift fork shaft body (5) and engaged with the steering gear (7), a rotating shaft head (3) is provided at one end of the shift fork shaft body (5), the rotating shaft head (3) is rotatably inserted into a blind hole (2) provided on one side of the gearbox body (1), an extension shaft body (11) is provided at the other end of the shift fork shaft body (5), the extension shaft body (11) extends out from a through hole (8) provided on the other side of the gearbox body (1), a skeleton oil seal (9) is installed in the through hole (8), a cover (10) is sleeved on the extension shaft body (11) and connected and fixed to the gearbox body (1) by bolts (15), the cover (10) limits the shift fork shaft body (5) in the gearbox body (1), and a swing arm (14) for connecting with the steering cable is connected to the extension shaft body (11).

2. The steering fork structure of the micro-tiller according to claim 1, characterized in that: The steering fork (6) includes a sliding sleeve (16) and a fork head (17). The fork head (17) is fixedly mounted on the sliding sleeve (16). The sliding sleeve (16) is provided with an insertion limiting hole (18) for the fork shaft (5) to pass through. The fork shaft (5) is provided with a flat shaft body (4).

3. The steering fork structure of the micro-tiller according to claim 1, characterized in that: The swing arm (14) is fixedly welded to the extended shaft (11).

4. The steering fork structure of the micro-tiller according to claim 1, characterized in that: The outer end of the protruding shaft (11) is provided with a threaded shaft head (12), and the swing arm (14) is installed on the threaded shaft head (12) and locked by a lock nut (13).

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