Lifting mechanism of riding type mini-tiller

Abstract

The utility model provides a lifting mechanism of a riding type mini-tiller, and belongs to the technical field of agricultural machinery. The problem that a walking wheel and a tillage tool are inconvenient to replace due to the fact that the height of an existing lifting mechanism of the mini-tiller cannot be adjusted is solved. The ejector rod is arranged in the stand column in a penetrating mode and matched with the stand column in a threaded mode, the driving structure is used for driving the ejector rod to rotate, the upper end of the ejector rod extends out of the upper end of the stand column, a connecting piece used for being detachably connected with the mini-tiller is arranged on the extending part, and the connecting piece is matched with the ejector rod in a rotating mode. When the driving structure drives the ejector rod to rotate in the stand column, the ejector rod can drive the connecting piece to ascend and descend. Due to the fact that the ejector rod is arranged in the stand column in a penetrating mode, the height of the whole lifting mechanism can be changed when the ejector rod ascends and descends, and the ejector rod can be lowered to the minimum to reduce the height of the whole lifting mechanism when stored.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery technology and relates to a lifting mechanism for a ride-on micro-tiller. Background Technology

[0002] When changing blades, performing maintenance, or performing other operations, the entire tiller needs to be raised and then returned to its original position. Therefore, an auxiliary lifting device is required. In existing technology, there are specially designed support components for changing blades in mini-tillers. However, these supports have the following problems: their installation height is not adjustable, and they are only suitable for frames of a specific height. If the frame is too high, they cannot be used; if the frame is too low, the frame must first be lifted by external force before the support can be installed, which is time-consuming and labor-intensive, significantly limiting its usability.

[0003] To this end, a Chinese patent discloses a support structure for a micro-tillage device [authorization announcement number CN218868636U], which includes a support component with an adjustable installation height. The support component includes a connecting sleeve with internal threads and a support rod threadedly connected to the connecting sleeve. A first connector is provided on the connecting sleeve, and the first connector is detachably connected to the tillage device.

[0004] The above-mentioned support structure can lift the frame by rotating the support rod, but it has the following problems: 1. The support rod is too long and cannot be folded, making it inconvenient to store the support structure after use; 2. The rotating handle is located at the top of the support rod, and the length of the support rod makes it inconvenient to operate the rotating handle. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a convenient and easy-to-store lifting mechanism for a ride-on micro-tiller.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A lifting mechanism for a ride-on mini-tiller includes a column, a push rod threaded through and connected to the column, and a drive structure for driving the push rod to rotate. The upper end of the push rod extends from the upper end of the column, and the extended portion is provided with a connector for detachable connection with the mini-tiller. The connector is rotatably connected to the push rod. When the drive structure drives the push rod to rotate inside the column, the push rod can drive the connector to move up and down.

[0008] When in use, place the column on the ground and detachably connect the connector to the frame of the mini tiller. Then, the drive mechanism causes the push rod to rotate inside the column. Since the push rod and the column are threaded together, the push rod moves up and down simultaneously when it rotates. Since the connector and the push rod rotate together, when the push rod moves up and down, it will drive the connector to move up and down, thereby achieving the purpose of lifting or resetting the frame of the mini tiller.

[0009] In the lifting mechanism of the above-mentioned riding micro-tiller, the column is fitted with a sleeve that can slide up and down along the column. The sleeve is circumferentially limited by the column. The upper end of the sleeve is rotatably engaged with the top rod. The connecting piece is provided on the sleeve.

[0010] When the push rod moves up and down, it drives the sleeve to move up and down. The sleeve drives the connecting piece to move up and down. The sleeve and the column are circumferentially limited, and the upper end of the sleeve is rotated with the push rod. When the push rod rotates, the sleeve will only move up and down and will not rotate with the push rod.

[0011] In the lifting mechanism of the above-mentioned riding micro-tiller, the upper end of the sleeve is fixedly connected to the mounting base, the upper end of the top rod passes through the mounting base and rotates with the mounting base, and the drive structure is located in the mounting base.

[0012] In the lifting mechanism of the above-mentioned riding micro-tiller, the drive structure includes a rotating shaft rotatably disposed in the mounting base, a drive gear coaxially disposed on the rotating shaft, and a driven gear coaxially disposed on the top rod. The drive gear meshes with the driven gear, and one end of the rotating shaft is provided with a crank handle for driving the rotating shaft to rotate.

[0013] The driving gear and driven gear are bevel gears. When the shaft rotates, it drives the driving gear to rotate, which in turn drives the driven gear to rotate, and the driven gear drives the push rod to rotate.

[0014] In the lifting mechanism of the aforementioned ride-on mini tiller, bushings are provided at both ends of the rotating shaft and between them and the mounting base. This reduces friction between the rotating shaft and the mounting base, extending its service life.

[0015] In the lifting mechanism of the aforementioned ride-on mini-tiller, the rotating shaft is perpendicular to the top rod. Because the rotating shaft is perpendicular to the top rod, and the top rod is vertically positioned, the rotating shaft is horizontally positioned, and the crank handle is located to the side of the sleeve for convenient manual operation.

[0016] In the lifting mechanism of the aforementioned ride-on mini-tiller, the crank handle is located on the side of the sleeve away from the connecting member. Since the connecting member needs to be connected to the frame of the mini-tiller, setting the crank handle away from the connecting member can prevent the mini-tiller from obstructing the rotation of the crank handle.

[0017] In the lifting mechanism of the above-mentioned riding micro-tiller, the column is cylindrical and a nut is fixed at its upper end. The top rod passes through the nut and is threadedly connected to the nut. A support seat is slidably fitted inside the column, and the lower end of the top rod is rotatably fitted with the support seat.

[0018] The push rod only engages with the nut thread, and the engagement section is short, resulting in little resistance to the push rod and making it easy to rotate. A support seat is provided at the lower end of the push rod to ensure its balance.

[0019] In the lifting mechanism of the aforementioned ride-on mini tiller, a bearing is provided between the support base and the top rod.

[0020] In the lifting mechanism of the aforementioned ride-on mini-tiller, the cross-section of the column is polygonal.

[0021] Compared with existing technologies, the lifting mechanism of this riding-type mini tiller has the following advantages:

[0022] Because the top rod passes through the column, the height of the entire lifting mechanism can be changed when the top rod moves up and down. When storing, the top rod can be lowered to the lowest point to reduce the height of the entire lifting mechanism, thereby achieving the purpose of convenient storage. The top rod is a screw rod with a short section that mates with the column. When rotating the top rod, the resistance caused by the thread to the top rod is small, making it easy to rotate the top rod. A support seat is provided at the lower end of the top rod to ensure the balance of the upper and lower ends of the top rod. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of the lifting mechanism of the ride-on micro-tiller provided by this utility model.

[0024] In the diagram, 1. Column; 2. Top rod; 3. Connector; 4. Sleeve; 5. Mounting base; 6. Shaft; 7. Drive gear; 8. Driven gear; 9. Handle; 10. Bushing; 11. Nut; 12. Support base; 13. Spring / tension spring; 14. Bearing; 15. Threaded section; 16. Nut. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] like Figure 1The lifting mechanism of the riding-type mini-tiller shown includes a rectangular column 1, a top rod 2 that is vertically inserted into the column 1 and threadedly engaged with the column 1, and a drive structure for driving the top rod 2 to rotate. The column 1 is cylindrical, with a nut 11 fixed at its upper end. The top rod 2 is a screw with its upper end inserted into the nut 11. The top rod 2 is threadedly connected to the nut 11. The lower end of the column 1 is provided with a plate-shaped base to increase the contact area between the column 1 and the ground, improve stability, reduce the pressure of the column 1 on the ground, and facilitate the lifting of the mini-tiller on soft soil.

[0027] To improve the stability of push rod 2, such as Figure 1 As shown, a support seat 12 is slidably fitted inside the column 1. The support seat 12 is circumferentially limited to the column 1. The lower end of the top rod 2 is rotatably fitted with the support seat 12. A bearing 14 is provided between the support seat 12 and the top rod 2.

[0028] Specifically, the lower end of the push rod 2 has a threaded section 15 with an outer diameter smaller than that of the push rod 2. A positioning step is formed between the threaded section 15 and the column 1. The bearing 14 is installed inside the support seat 12, with its inner ring resting against the positioning step. The threaded section 15 extends downwards through the support seat 12, and a nut 16 is threadedly connected to the extended portion. The bottom of the support seat 12 acts on this nut 16. When the push rod 2 rotates, only the inner ring of the bearing 14 rotates; the support seat 12 does not move or rotate.

[0029] like Figure 1 As shown, a sleeve 4 that can slide up and down along the column 1 is provided on the outer sleeve of the column 1. The cross-section of the sleeve 4 is the same as that of the column 1, and the two achieve circumferential positioning. A mounting base 5 is fixedly connected to the upper end of the sleeve 4. The upper end of the top rod 2 passes through the mounting base 5 and rotates with the mounting base 5. The drive structure is located in the mounting base 5. The sleeve 4 is provided with a connector 3 for detachable connection with the micro-tiller. The longitudinal section of the connector 3 is rectangular and matches the connecting end of the micro-tiller frame. When connecting, the connector 3 is inserted into the connecting end of the frame and locked by a pin.

[0030] like Figure 1 As shown, the drive structure includes a horizontally rotatable shaft 6 within the mounting base 5, a driving gear 7 coaxially mounted on the shaft 6, and a driven gear 8 coaxially mounted on the push rod 2. In this embodiment, the driven gear 8 is connected to the push rod 2 via a pin. The driving gear 7 and the driven gear 8 are bevel gears, meshing with each other. One end of the shaft 6 is equipped with a crank 9 for driving the shaft 6 to rotate. When the shaft 6 rotates, it drives the driving gear 7 to rotate, which in turn drives the driven gear 8 to rotate, which in turn drives the push rod 2 to rotate.

[0031] To reduce friction, such as Figure 1As shown, bushings 10 are provided between the two ends of the rotating shaft 6 and the mounting base 5, which can extend the service life of the rotating shaft 6.

[0032] like Figure 1 As shown, the crank handle 9 is located on the side of the sleeve 4 away from the connector 3. Since the connector 3 is to be connected to the frame of the micro-tiller, it can prevent the micro-tiller from obstructing the rotation of the crank handle 9.

[0033] The drive gear 7 is sleeved on the rotating shaft 6 and is circumferentially limited by the rotating shaft 6. When the rotating shaft 6 rotates, it can drive the drive gear 7 to rotate. Figure 1 As shown, a spring / tension spring 13 is sleeved on the rotating shaft 6. In this embodiment, it is a tension spring 13. One end of the spring / tension spring 13 acts on the driving gear 7, and the other end acts on the mounting base 5. Under the action of the spring / tension spring 13, the driving gear 7 is always meshed with the driven gear 8.

[0034] When in use, the column 1 is placed on the ground, and the connecting piece 3 is detachably connected to the frame of the mini tiller. Then, the drive structure causes the push rod 2 to rotate inside the column 1. Since the push rod 2 and the column 1 are threaded together, the push rod 2 moves up and down simultaneously when it rotates. Since the connecting piece 3 is rotatably connected to the push rod 2, when the push rod 2 moves up and down, it will drive the connecting piece 3 to move up and down, thereby achieving the purpose of lifting or resetting the frame of the mini tiller.

[0035] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A lift mechanism of a ride-on mini-tiller, characterized by comprising: The utility model provides a micro tiller, which comprises a stand (1), a jacking rod (2) arranged in the stand (1) and threadedly connected with the stand (1), and a driving structure for driving the jacking rod (2) to rotate, wherein the upper end of the jacking rod (2) extends out of the upper end of the stand (1), and a connecting piece (3) for detachably connecting with the micro tiller is arranged on the extended part, the connecting piece (3) is rotationally connected with the jacking rod (2), and the driving structure drives the jacking rod (2) to rotate in the stand (1), so that the connecting piece (3) can be lifted up and down.

2. The lift mechanism of a ride-on mini-tiller according to claim 1, wherein The stand (1) is sleeved with a sleeve (4) which can slide up and down along the stand (1), the sleeve (4) is circumferentially limited with the stand (1), the upper end of the sleeve (4) is rotationally connected with the jacking rod (2), and the connecting piece (3) is arranged on the sleeve (4).

3. The lift mechanism of a ride-on mini-tiller according to claim 2, wherein The upper end of the sleeve (4) is fixedly connected with a mounting base (5), the upper end of the jacking rod (2) is arranged in the mounting base (5) and rotationally connected with the mounting base (5), and the driving structure is arranged in the mounting base (5).

4. The lift mechanism of a ride-on mini-tiller according to claim 3, wherein The driving structure comprises a rotating shaft (6) rotationally arranged in the mounting base (5), a driving gear (7) coaxially arranged on the rotating shaft (6), and a driven gear (8) coaxially arranged on the jacking rod (2), the driving gear (7) is meshed with the driven gear (8), and one end of the rotating shaft (6) is provided with a handle (9) for driving the rotating shaft (6) to rotate.

5. The lift mechanism of a ride-on mini-tiller according to claim 4, wherein Axle sleeves (10) are arranged between the two ends of the rotating shaft (6) and the mounting base (5) respectively.

6. The lift mechanism of a ride-on mini-tiller according to claim 4, wherein The rotating shaft (6) is perpendicular to the jacking rod (2).

7. The lift mechanism of a ride-on mini-tiller according to claim 4, wherein The handle (9) is located on the side of the sleeve (4) away from the connecting piece (3).

8. The lift mechanism of a ride-on mini-tiller according to claim 1, wherein The stand (1) is in a cylindrical shape, and a nut (11) is fixedly arranged at the upper end of the stand (1), the jacking rod (2) is arranged in the nut (11) and threadedly connected with the nut (11), a supporting base (12) is slidingly arranged in the stand (1), and the lower end of the jacking rod (2) is rotationally connected with the supporting base (12).

9. The lift mechanism of a ride-on mini-tiller according to claim 8, wherein A bearing (14) is arranged between the supporting base (12) and the jacking rod (2).

10. The lift mechanism of a ride-on mini-tiller according to claim 1, wherein The cross section of the stand (1) is in a polygonal shape.

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