Steering mechanism and mini-tiller

Abstract

The application discloses a steering mechanism and a mini-cultivator. The steering mechanism comprises a first transmission gear arranged on a transmission shaft, a pair of adjusting gears which are arranged on the transmission shaft in a slidable and spaced manner, a pair of walking shafts which are arranged in a walking box in a spaced and opposite manner, a pair of walking gears which are arranged on the pair of walking shafts respectively and correspondingly, and a pair of push rods which are in abutment with the adjusting gears respectively. When turning left or right is needed, one of the push rods is turned, the push rod pushes one of the adjusting gears to move, the adjusting gear is separated from the walking gear, one of the walking shafts is cut off, the other walking shaft continues to output power, left turning or right turning is realized, and the steering of the mini-cultivator is more labor-saving, the operation is more convenient, and the flexibility is higher.

Description

Technical Field

[0001] This invention belongs to the field of micro-tiller technology, specifically relating to a steering mechanism and a micro-tiller. Background Technology

[0002] In China's vast rural areas, mini tillers are becoming increasingly widely used, playing a significant role in tilling and cultivation. Operators typically hold the handlebars of the mini tiller with both hands as it moves forward, controlling the rotation of the wheels at both ends via cables on the handlebars.

[0003] The existing mini-tillers mainly rely on a person to turn the handlebars to steer, and the mini-tiller needs to be stopped when turning, and then restarted after the turn is completed. This makes the turning process very troublesome and laborious, and can no longer meet the needs of agricultural production. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a steering mechanism and a micro-tiller, which aims to solve the technical problems of difficult steering and poor flexibility of existing micro-tillers.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a steering mechanism, comprising:

[0006] A drive shaft, and a first drive gear mounted on the drive shaft;

[0007] A pair of adjusting gears are slidably distributed at intervals on the drive shaft;

[0008] A pair of traveling shafts are arranged at intervals opposite each other in the traveling box;

[0009] A pair of traveling gears are respectively disposed on a pair of traveling shafts and mesh with a pair of adjusting gears;

[0010] A pair of levers, each abutting against one of the adjusting gears, are used to push the adjusting gears to separate from the traveling gears.

[0011] Furthermore, the adjusting gear includes a gear portion for meshing with the travel gear and an abutting portion for engaging with the lever to separate the gear portion from the travel gear, with a groove formed between the gear portion and the abutting portion for the lever to extend into.

[0012] Furthermore, the lever includes a lever body and an abutment rod disposed at one end of the lever body near the abutment portion, the abutment rod being used to abut against the abutment portion when the lever body is rotated to a preset position.

[0013] Furthermore, the transmission shaft is also fitted with an elastic element for elastically pushing the adjusting gear, and the two ends of the elastic element abut against the abutting parts of a pair of adjusting gears respectively.

[0014] Furthermore, the drive shaft is also provided with a limiting retaining ring for limiting the sliding stroke of the adjusting gear.

[0015] Furthermore, the transmission shaft is provided with external splines at both ends, and each of the adjusting gears is also provided with a spline groove that mates with the external splines.

[0016] This application also provides a micro-tiller, including:

[0017] The gear shifting mechanism is used to connect to an external power unit;

[0018] Steering mechanism, used to receive external power and make steering adjustments;

[0019] The clutch assembly is used to interrupt power transmission to cooperate with the gear shifting mechanism for gear adjustment, and to transmit power to the steering structure.

[0020] The steering mechanism is the same as described above.

[0021] Furthermore, the gear shifting mechanism includes a first rotating shaft and a second rotating shaft arranged in parallel in the transmission box, a power wheel disposed at the end of the first rotating shaft, a double gear slidably mounted on the first rotating shaft, and a shift fork disposed on the second rotating shaft for moving the double gear. The clutch assembly includes a double auxiliary gear for meshing with the double gear.

[0022] Furthermore, the clutch assembly includes a transmission rod and a third rotating shaft arranged in parallel in the transmission box, the double auxiliary gear is mounted on the third rotating shaft, the transmission rod is provided with a brake pad for braking the rotation of the double auxiliary gear, and the third rotating shaft is provided with a transition gear for meshing with the first transmission gear.

[0023] Furthermore, the double auxiliary gear is provided with a brake groove, and the transmission rod can drive the brake pad to be inserted into the brake groove.

[0024] The beneficial effects of this invention are as follows: Compared with the prior art, the steering mechanism of this invention can receive power input from an external power unit through a first transmission gear on the transmission shaft. The first transmission gear drives the transmission shaft to rotate, the transmission shaft drives a pair of adjusting gears to rotate, the pair of adjusting gears then drive a pair of traveling gears to rotate, and the pair of traveling gears drive a pair of traveling shafts to rotate, thereby enabling the tiller to move straight forward. By setting a pair of levers, when a left or right turn is required, rotating one of the levers will push one of the adjusting gears to move, causing the adjusting gear to separate from the traveling gear, thereby cutting off the power to one of the traveling shafts, while the other traveling shaft continues to output power, realizing a left or right turn. This makes the tiller's steering more effortless, operation more convenient, and flexibility higher.

[0025] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0026] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0027] Figure 1 This is a schematic diagram of the structure of a micro-tiller from one perspective according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of a micro-tiller from another perspective according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the power transmission structure of a micro-tiller according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the steering mechanism proposed in an embodiment of the present invention;

[0031] Figure 5 This is an exploded view of a steering mechanism according to an embodiment of the present invention;

[0032] Figure 6 This is a cross-sectional view of the connection between the drive shaft and the adjusting gear according to an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of an adjusting gear according to an embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of the lever structure proposed in an embodiment of the present invention.

[0035] Icon labels:

[0036] 1-Steering mechanism; 11-Drive shaft; 111-External spline; 12-Adjusting gear; 121-Gear section; 122-Abutting part; 123-Groove; 13-Traveling shaft; 14-Traveling gear; 15-Lever; 151-Lever body; 152-Abutting rod; 16-First transmission gear; 17-Elastic element;

[0037] 2-Shifting mechanism; 21-First rotating shaft; 22-Second rotating shaft; 23-Drive wheel; 24-Double gear; 25-Shift fork; 26-Shift groove;

[0038] 3-Clutch assembly; 31-Double auxiliary gear; 32-Third rotating shaft; 33-Transmission rod; 34-Brake pad; 35-Transition gear; 36-Brake groove. Detailed Implementation

[0039] like Figures 1 to 7 As shown, this embodiment proposes a steering mechanism 1, including a drive shaft 11, a pair of adjusting gears 12, a pair of traveling shafts 13, a pair of traveling gears 14, and a pair of levers 15. The drive shaft 11 is provided with a first drive gear 16. The pair of adjusting gears 12 are arranged at intervals on the drive shaft 11, and the pair of adjusting gears 12 can slide along the drive shaft 11. The pair of traveling shafts 13 are arranged at intervals opposite each other in the traveling gearbox. The pair of traveling gears 14 are respectively arranged on the pair of traveling shafts 13, and the pair of traveling gears 14 are respectively meshed with the pair of adjusting gears 12. In addition, the steering mechanism 1 also includes a pair of levers 15, which abut against the adjusting gears 12 respectively, and the pair of levers 15 can be used to push each adjusting gear 12 to separate from each traveling gear 14. In this way, the first transmission gear 16 on the transmission shaft 11 can receive power input from an external power unit. The first transmission gear 16 drives the transmission shaft 11 to rotate, the transmission shaft 11 drives a pair of adjusting gears 12 to rotate, the pair of adjusting gears 12 then drive a pair of traveling gears 14 to rotate, and the pair of traveling gears 14 drive a pair of traveling shafts 13 to rotate, thereby enabling the tiller to move straight forward. By setting a pair of levers 15, when it is necessary to turn left or right, one of the levers 15 is rotated, which pushes one of the adjusting gears 12 to move, causing the adjusting gear 12 to separate from the traveling gears 14, thereby cutting off the power to one of the traveling shafts 13, while the other traveling shaft 13 continues to output power, realizing a left or right turn. This makes the tiller's steering more effortless, its operation more convenient, and its flexibility higher.

[0040] In this application, when the steering mechanism 1 is in operation, its power comes from an external power unit, that is, the power unit outputs power and transmits the power directly or through the transmission box assembly to the first transmission gear 16. The first transmission gear 16 transmits power to the travel shaft 13 in sequence through the transmission shaft 11, the adjusting gear 12, and the travel gear 14. The travel shaft 13 drives the external tires to rotate, realizing the straight-line forward movement of the tiller. For ease of description, a pair of levers 15 are defined as the left lever and the right lever, and a pair of travel shafts 13 are positioned as the left travel shaft and the right travel shaft. When turning right, rotating the right lever clockwise causes the adjusting gear 12 to separate from the travel gear 14, thus cutting off the power to the right travel shaft while the left travel shaft continues to output power, achieving a right turn. When turning left, rotating the left lever counterclockwise causes the adjusting gear 12 to separate from the travel shaft 14, thus cutting off the power to the left travel shaft while the right travel shaft continues to output power, achieving a left turn. This reduces frictional resistance during the turning process, making the tiller's steering more effortless.

[0041] Further, please refer to Figure 4 and Figure 7 As shown, the adjusting gear 12 includes a gear portion 121 and an abutment portion 122. The gear portion 121 can mesh with the traveling gear 14, and the abutment portion 122 can abut against the lever 15. A groove 123 is also formed between the gear portion 121 and the abutment portion 122, into which the lever 15 can extend. In this way, by providing the gear portion 121, power can be transmitted to the traveling gear 14; by providing the abutment portion 122, when the lever 15 rotates, the lever 15 abuts against the abutment portion 122, thereby pushing the gear portion 121 to separate from the traveling gear 14 and achieving power cut-off; by providing the groove 123, it is convenient to position the lever 15, which is beneficial for the lever 15 to abut against the abutment portion 122 and push the gear portion 121 to move.

[0042] Preferably, in this embodiment, the abutting part 122 is an annular frustum. Of course, in this embodiment, the abutting part 122 can also be set as any structure in the art that can abut against the lever 15, and is not limited here.

[0043] Further, please refer to Figure 4 , Figure 7 and Figure 8As shown, the lever 15 includes a lever body 151 and an abutment rod 152. The abutment rod 152 is disposed at one end of the lever body 151 near the abutment portion 122. The abutment rod 152 can be used to abut against the abutment portion 122 when the lever body 151 rotates to a preset position. Preferably, the abutment rod 122 is perpendicular to the lever body 151, and the length of the abutment rod 152 is not less than the diameter of the gear portion 121. Thus, when the abutment rod 152 rotates in the groove with the lever body 151, the abutment rod 152 can push the abutment portion 122 to move a distance equal to the length of the abutment rod 152. The abutment portion 122 then drives the gear portion 121 to move a distance equal to the length of the abutment rod 152, thereby ensuring that the gear portion 121 is separated from the traveling gear 14.

[0044] Further, please refer to Figure 4 As shown, the transmission shaft 11 is also provided with an elastic element 17, the two ends of which abut against the abutment portion 122 of the pair of adjusting gears 12. In this way, by providing the elastic element 17, the moved adjusting gears 12 can be elastically reset through the elastic element 17, which is efficient and convenient.

[0045] Further, please refer to Figure 6 As shown, the drive shaft 11 has external splines 111 at both ends, and each adjusting gear 12 has a spline groove. The external splines 111 and the spline grooves are connected in a mating manner. Through the mating connection between the external splines 111 and the spline grooves, the drive shaft 11 can transmit the output power to the adjusting gear 12.

[0046] Please see Figures 1 to 3 As shown, this application also provides a micro-tiller, including a gear shifting mechanism 2, a steering mechanism 1, and a clutch assembly 3. The gear shifting mechanism 2 can be connected to an external power unit, the steering mechanism 1 can be used to receive external power and perform steering adjustment, and the clutch assembly 3 can be used to interrupt power transmission to cooperate with the gear shifting mechanism 2 to perform gear adjustment and to transmit power to the steering mechanism 1. The steering mechanism 1 is the steering mechanism 1 described above, and will not be described in detail here.

[0047] Further, please refer to Figure 1 As shown, the gear shifting mechanism 2 includes a first rotating shaft 21 and a second rotating shaft 22. The first rotating shaft 21 and the second rotating shaft 22 are arranged parallel to each other in the transmission box. The first rotating shaft 21 is provided with a power wheel 23 and a double gear 24. The power wheel 23 is located at the end of the first rotating shaft 21. The double gear 24 is slidably mounted on the first rotating shaft 21. The second rotating shaft 22 is provided with a shift fork 25, which can be used to move the double gear 24. The clutch assembly 3 includes a double auxiliary gear 31, which can mesh with the double gear 24.

[0048] In this application, the double gear 24 is integrally formed from two gears with different outer diameters; the double auxiliary gear 31 is also integrally formed from two gears with different outer diameters. Thus, when gear adjustment is required, the double gear 24 is moved by the shift fork 25, causing the double gear 24 to mesh with the different-sized gears of the double auxiliary gear 31, thereby achieving gear switching.

[0049] Preferably, please refer to Figure 2 The double gears 24 are provided with a groove 26 between them, and the shift fork 25 is placed in the groove 26. By providing the groove 26, it is easier for the shift fork 25 to drive the double gears 24 to move.

[0050] Further, please refer to Figure 1 As shown, the clutch assembly 3 includes a transmission rod 33 and a third rotating shaft 32 arranged in parallel in the transmission box. The double auxiliary gear 31 is mounted on the third rotating shaft 32. The transmission rod 33 is provided with a brake pad 34, which can be used to brake the rotation of the double auxiliary gear 31. In addition, the third rotating shaft 32 is also provided with a transition gear 35, which can mesh with the first transmission gear 16.

[0051] In this application, the power transmission principle is as follows:

[0052] The power unit transmits power to the power wheel 23, which drives the first rotating shaft 21 to rotate. The first rotating shaft 21 drives the double gear 24 to rotate, the double gear 24 drives the double auxiliary gear 31 to rotate, the double auxiliary gear 31 drives the third rotating shaft 32 to rotate, the third rotating shaft 32 drives the transition gear 35 to rotate, and the transition gear 35 in turn drives the first transmission gear 16 to rotate. The first transmission gear 16 transmits power to the travel shaft 13 in sequence through the transmission shaft 11, the adjusting gear 12, and the travel gear 14. The travel shaft 13 drives the external tires to rotate, realizing the straight-line forward movement of the micro-tiller.

[0053] Further, please refer to Figure 1 As shown, the double auxiliary gear 31 is provided with a brake groove 36, and the transmission rod 33 can drive the brake pad 34 to insert into the brake groove 36. In this way, when braking is required, the transmission rod 33 drives the brake pad 34 to insert into the brake groove 36, thereby realizing the braking of the double auxiliary gear 31. At this time, the double gear 24 can be moved by the shift fork 25 to complete the gear shift.

[0054] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention 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 the present invention.

Claims

1. A steering mechanism, characterized in that, include: A drive shaft, and a first drive gear mounted on the drive shaft; A pair of adjusting gears are slidably distributed at intervals on the drive shaft; A pair of traveling shafts are arranged at intervals opposite each other in the traveling box; A pair of traveling gears are respectively disposed on a pair of traveling shafts and mesh with a pair of adjusting gears; A pair of levers, each abutting against one of the adjusting gears, are used to push the adjusting gears to separate from the traveling gears; The adjusting gear includes a gear portion for meshing with the traveling gear and an abutting portion for engaging with the lever to separate the gear portion from the traveling gear, with a groove formed between the gear portion and the abutting portion for the lever to extend into. The lever includes a lever body and an abutment rod disposed at one end of the lever body near the abutment portion. The abutment rod is used to abut against the abutment portion when the lever body is rotated to a preset position. The drive shaft is also fitted with an elastic element for elastically pushing the adjusting gear, and the two ends of the elastic element abut against the abutting parts of a pair of adjusting gears respectively. The abutment rod is perpendicular to the lever body, and the length of the abutment rod is not less than the diameter of the gear part.

2. A steering mechanism according to claim 1, characterized in that, The transmission shaft is provided with external splines at both ends, and each of the adjusting gears is also provided with a spline groove that mates with the external splines.

3. A micro-tiller, characterized in that, include: The gear shifting mechanism is used to connect to an external power unit; Steering mechanism, used to receive external power and make steering adjustments; The clutch assembly is used to interrupt power transmission to cooperate with the gear shifting mechanism for gear adjustment, and to transmit power to the steering mechanism; The steering mechanism is the steering mechanism as described in any one of claims 1 to 2.

4. A micro-tiller according to claim 3, characterized in that, The gear shifting mechanism includes a first shaft and a second shaft arranged in parallel in the transmission box, a power wheel disposed at the end of the first shaft, a double gear slidably mounted on the first shaft, and a shift fork disposed on the second shaft for moving the double gear. The clutch assembly includes a double auxiliary gear for meshing with the double gear.

5. A micro-tiller according to claim 4, characterized in that, The clutch assembly includes a transmission rod and a third rotating shaft arranged in parallel in the transmission box. The double auxiliary gear is mounted on the third rotating shaft. The transmission rod is provided with a brake pad for braking the rotation of the double auxiliary gear. The third rotating shaft is provided with a transition gear for meshing with the first transmission gear.

6. A micro-tiller according to claim 5, characterized in that, The double auxiliary gear is provided with a brake groove, and the transmission rod can drive the brake pad to be inserted into the brake groove.

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