A rotary cultivator with quick folding function of rear wheels

Abstract

The utility model provides a kind of rotary cultivator with rear wheel quick folding function, including frame and wheel shaft, further include: adjusting disc, fixedly arranged in frame;Connecting plate, wheel shaft is arranged in connecting plate, adjusting disc is equipped with mounting shaft, connecting plate rotation is arranged in mounting shaft;Clamping assembly, sliding is arranged in connecting plate, adjusting disc is equipped with several clamping slots with mounting shaft as pivot, clamping assembly is clamped in one clamping slot, to connecting plate is fixed in adjusting disc. Wheel shaft is rotatably mounted on the mounting shaft of adjusting disc by connecting plate, so that wheel shaft can rotate with mounting shaft as pivot, under the cooperation of clamping assembly, connecting plate can be fixed in one clamping slot on adjusting disc, compared with the mode of traditional bolt fixation, the scheme uses mechanical clamping structure, realizes quick positioning and fixation, without tool auxiliary, single hand can complete adjustment, and under the setting of multiple clamping slots, realize multi-angle, multi-height adjustment, meet different ploughing depth, transportation state conversion and other needs.

Description

Technical Field

[0001] This utility model relates to the field of rotary tiller technology, and in particular to a rotary tiller with a rapid retraction and extension function of the rear wheels. Background Technology

[0002] Rotary tillers, as an important type of agricultural machinery, are widely used in tillage operations in both dry and paddy fields. They primarily use high-speed rotating blades to cut and break up the soil, achieving the purpose of soil fragmentation and land leveling. To adapt to different operational needs, such as adjusting tillage depth and switching between transport modes, rotary tillers are usually equipped with rear support wheels, used to support the machine body when not in operation and to adjust the tillage depth when in operation.

[0003] For example, Chinese patent "CN202026576U" discloses "a rotary tiller," which uses a sleeve fixing bolt and a sleeve fixing clamp to install the tail wheel. When adjusting the tail wheel, the sleeve fixing bolt is loosened, the tail wheel is adjusted, and then the loose sleeve fixing bolt is tightened to fix the tail wheel. However, in use, it was found that the above-mentioned rotary tiller requires loosening and tightening the sleeve fixing bolt every time the tail wheel is adjusted, and tools are needed for the operation, making it inconvenient to use. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a rotary tiller with a quick rear wheel retraction function, which solves the problem that it is inconvenient to adjust the tail wheel in existing rotary tillers.

[0005] According to the embodiments of this utility model, the following technical solution is adopted:

[0006] A rotary tiller with a quick-release rear wheel function includes a frame and axles, and also includes:

[0007] The adjustment disc is fixedly mounted on the vehicle frame;

[0008] A connecting plate is provided, and an axle is located on the connecting plate. An adjusting disc is provided with a mounting shaft, and the connecting plate is rotatably mounted on the mounting shaft.

[0009] The snap-fit ​​assembly is slidably mounted on the connecting plate. The adjusting plate has several slots with the mounting shaft as the axis. The snap-fit ​​assembly snaps into one of the slots to fix the connecting plate to the adjusting plate.

[0010] Preferably, the snap-fit ​​component includes:

[0011] The connecting plate has a first limiting hole that penetrates through it. The locking pin is slidably engaged with the first limiting hole, and both ends penetrate to both sides of the connecting plate, with one end engaged with one of the slots.

[0012] The elastic element connects the mounting shaft to the other end of the locking pin.

[0013] Preferably, the elastic element is a tension spring, with its two ends connected to the mounting shaft and the retaining pin, respectively.

[0014] Preferably, the snap-fit ​​assembly further includes an adjustment plate, which is connected to the snap-fit ​​pin.

[0015] Preferably, the adjusting plate is provided with a limiting pin, and the connecting plate is provided with a second limiting hole, and the limiting pin is slidably engaged with the second limiting hole.

[0016] Preferably, the end of the limiting pin away from the second limiting hole is provided with a handle.

[0017] Preferably, the middle part of the handle is recessed inward to form an arc-shaped groove.

[0018] Preferably, both the mounting shaft and the end of the retaining pin are threaded with nuts.

[0019] Preferably, the edge of the connecting plate is bent outward to form a bent edge.

[0020] Preferably, the depth of the slot is greater than the diameter of the pin.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The axle is rotatably mounted on the mounting shaft of the adjusting disc via a connecting plate, allowing the axle to rotate around the mounting shaft. Simultaneously, with the assistance of the snap-fit ​​assembly, the connecting plate can be fixed in one of the slots on the adjusting disc. Compared to traditional bolt fixing, this solution uses a mechanical snap-fit ​​structure for rapid positioning and fixing, requiring no tools and allowing adjustment with one hand. Furthermore, the multiple slots enable multi-angle and multi-height adjustments to meet the needs of different tillage depths and transportation configurations. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the rotary tiller from one angle in an embodiment of this utility model.

[0024] Figure 2 for Figure 1 A magnified structural diagram of region A in the middle.

[0025] Figure 3 This is a three-dimensional structural diagram of the rotary tiller from another angle in an embodiment of this utility model.

[0026] Figure 4 for Figure 3 A magnified structural diagram of region B in the middle.

[0027] In the above attached figures: 1. Frame; 2. Axle; 3. Adjustment plate; 301. Slot; 302. Mounting shaft; 4. Connecting plate; 401. First limiting hole; 402. Second limiting hole; 403. Bending edge; 5. Adjustment plate; 6. Limiting pin; 601. Handle; 602. Nut; 7. Locking pin; 8. Tension spring. Detailed Implementation

[0028] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0029] This utility model embodiment proposes a rotary tiller with a quick rear wheel retraction function, including a frame 1 and a wheel axle 2, and further including:

[0030] Adjustment disc 3 is fixedly mounted on the frame 1;

[0031] The connecting plate 4 and the wheel axle 2 are provided on the connecting plate 4. The adjusting plate 3 is provided with the mounting shaft 302. The connecting plate 4 is rotatably mounted on the mounting shaft 302.

[0032] The snap-fit ​​assembly is slidably mounted on the connecting plate 4. The adjusting plate 3 has several slots 301 with the mounting shaft 302 as the axis. The snap-fit ​​assembly snaps into one of the slots 301 to fix the connecting plate 4 to the adjusting plate 3.

[0033] In the embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the axle 2 can be rotatably mounted on the connecting plate 4 or fixedly mounted on the connecting plate 4. The wheel and the axle 2 are connected by bearings. The axle 2 is rotatably mounted on the mounting shaft 302 of the adjusting plate 3 via the connecting plate 4. The adjusting plate 3 is fixedly mounted on the frame 1. The fixing method includes, but is not limited to, welding, so that the axle 2 can rotate around the mounting shaft 302 as the axis. At the same time, with the cooperation of the snap-fit ​​assembly, the connecting plate 4 can be fixed in one of the slots 301 on the adjusting plate 3. Compared with the traditional bolt fixing method, this solution adopts a mechanical snap-fit ​​structure to achieve quick positioning and fixing. No tools are required, and adjustment can be completed with one hand. Moreover, with the setting of multiple slots 301, the axle 2 can be adjusted at multiple angles and heights to meet the needs of different tillage depths and transportation status conversions.

[0034] Based on the above solution, the structure of the snap-fit ​​component is optimized, such as... Figures 2 to 4 As shown, the snap-fit ​​assembly includes:

[0035] The connecting plate 4 has a first limiting hole 401 that penetrates through it. The locking pin 7 is slidably engaged with the first limiting hole 401, and both ends penetrate through to both sides of the connecting plate 4, with one end engaged with one of the slots 301.

[0036] An elastic element is connected between the mounting shaft 302 and the other end of the locking pin 7.

[0037] The elastic element can be any type of elastic component, such as a spring or a sheet, used to apply an elastic restoring force to the locking pin 7, causing it to automatically engage in the slot 301. When unlocking the wheel axle 2, the locking pin 7 is pressed, causing it to slide in the first limiting hole 401 until it is completely disengaged from the corresponding slot 301, thus unlocking the wheel axle 2. During the manual lifting of the connecting plate 4, the locking pin 7 can be released. When the locking pin 7 moves along the edge of the adjusting plate 3 and corresponds to the next slot 301, it can automatically engage in this slot 301 under the force of the elastic element, thus achieving automatic limiting of the wheel axle 2. By engaging the locking pin 7 with the slot 301, problems such as thread wear and plate deformation caused by frequent disassembly and assembly in traditional bolt fastening structures are avoided.

[0038] Specifically, the elastic element is a tension spring 8, with its two ends connected to the mounting shaft 302 and the locking pin 7, respectively. Compared to compression springs or other elastic structures, the tension spring 8 can provide a more stable restoring force in the stretched state, ensuring that the locking pin 7 always tends to move towards the locking groove 301, thus guaranteeing the stability of the locking.

[0039] To facilitate the adjustment of the card-mount components, such as Figure 2 As shown, the locking assembly also includes an adjustment plate 5, which is connected to the locking pin 7. When the locking pin 7 is adjusted, when the operator pulls the adjustment plate 5, the adjustment plate 5 drives the locking pin 7 to overcome the tension of the tension spring 8 and disengage it from the locking groove 301 of the adjustment plate 3, which increases the operating area between the palm and the locking pin 7. The operator can complete the unlocking operation without directly contacting the locking pin 7.

[0040] Furthermore, the adjusting plate 5 is equipped with a limiting pin 6, and the connecting plate 4 is provided with a second limiting hole 402. The limiting pin 6 is slidably engaged with the second limiting hole 402, and the limiting pin 6 guides the adjusting plate 5 to ensure the normal sliding path of the adjusting plate 5. At the same time, a handle 601 is provided at the end of the limiting pin 6 away from the second limiting hole 402. The handle 601 provides an easy-to-grip operating point for the operator, improving the convenience of unlocking operation. In addition, the middle part of the handle 601 is recessed inward to form an arc groove, further providing a more comfortable gripping contact surface and improving the operating experience.

[0041] Specifically, such as Figure 2 As shown, both the mounting shaft 302 and the end of the locking pin 7 are threaded with nuts 602, which are used to limit the axial movement of the tension spring 8, ensure its stability during tension and compression, prevent it from slipping, shifting or failing during operation, and facilitate the maintenance and replacement of the tension spring 8 in the future.

[0042] Specifically, such as Figure 4As shown, the edge of the connecting plate 4 is bent outward to form a bent edge 403. The bent edge 403 increases the section modulus of the connecting plate 4, improves its ability to resist bending deformation, and ensures that it will not deform during long-term use.

[0043] Specifically, such as Figure 1 As shown, the depth of the slot 301 is greater than the diameter of the pin 7, so that the pin 7 can be inserted into the slot 301 and go deep into the slot, avoiding only slight insertion and causing disengagement. This ensures that the pin 7 can maintain a stable locking state even when subjected to vibration, impact or tension during the operation of the rotary tiller.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A rotary tiller with a quick retraction and extension function for the rear wheels, comprising a frame (1) and axles (2), characterized in that, Also includes: Adjustment disc (3) is fixedly mounted on the frame (1); A connecting plate (4) is provided, the wheel axle (2) is provided on the connecting plate (4), the adjusting disc (3) is provided with a mounting shaft (302), and the connecting plate (4) is rotatably provided on the mounting shaft (302); A snap-fit ​​assembly is slidably disposed on the connecting plate (4). The adjusting plate (3) has several slots (301) with the mounting shaft (302) as the axis. The snap-fit ​​assembly snaps into one of the slots (301) to fix the connecting plate (4) to the adjusting plate (3).

2. A rotary tiller with a rapid rear wheel retraction function according to claim 1, characterized in that, The snap-fit ​​assembly includes: The connecting plate (4) has a first limiting hole (401) that penetrates through it. The locking pin (7) is slidably engaged with the first limiting hole (401) and its two ends penetrate through to both sides of the connecting plate (4), with one end engaged with one of the slots (301). An elastic element is connected between the mounting shaft (302) and the other end of the locking pin (7).

3. A rotary tiller with a rapid rear wheel retraction function according to claim 2, characterized in that, The elastic element is a tension spring (8), and the two ends of the tension spring (8) are respectively connected to the mounting shaft (302) and the locking pin (7).

4. A rotary tiller with a rapid rear wheel retraction function according to claim 2, characterized in that, The snap-fit ​​assembly also includes an adjustment plate (5), which is connected to the snap pin (7).

5. A rotary tiller with a rapid rear wheel retraction function according to claim 4, characterized in that, The adjusting plate (5) is provided with a limiting pin (6), and the connecting plate (4) is provided with a second limiting hole (402). The limiting pin (6) is slidably engaged with the second limiting hole (402).

6. A rotary tiller with a rapid rear wheel retraction function according to claim 5, characterized in that, The end of the limiting pin (6) away from the second limiting hole (402) is provided with a handle (601).

7. A rotary tiller with a rapid rear wheel retraction function according to claim 6, characterized in that, The handle (601) is recessed inward to form an arc-shaped groove in the middle.

8. A rotary tiller with a rapid rear wheel retraction function according to claim 3, characterized in that, The mounting shaft (302) and the end of the locking pin (7) are both threaded with nuts (602).

9. A rotary tiller with a rapid rear wheel retraction function according to claim 1, characterized in that, The edge of the connecting plate (4) is bent outward to form a bent edge (403).

10. A rotary tiller with a rapid rear wheel retraction function according to claim 2, characterized in that, The depth of the slot (301) is greater than the diameter of the pin (7).

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