A multi-speed adjustment device for micro-tillers

Abstract

This utility model discloses a multi-speed adjustment device for a micro-tiller, relating to the field of micro-tiller technology. It includes a speed control box, inside which are an input shaft and an output shaft. Both ends of the output shaft extend out of the speed control box and are equipped with connecting flanges. Multiple gears are mounted on the input shaft. A rotating tube is rotatably mounted outside the output shaft. A transmission gear is mounted outside the rotating tube, and multiple fixing blocks are mounted on the transmission gear. A transmission tube is sleeved on the output shaft, and a keyway is formed inside the transmission tube. A transmission key that mates with the keyway is provided on the output shaft. An installation groove is formed on the inner wall of the speed control box, and a support plate is slidably mounted inside the installation groove. Power is transmitted to the transmission tube through the fixing blocks and transmission blocks, driving the output shaft to rotate. By switching the engagement of different gears, multiple speed outputs of the output shaft can be achieved, adapting to different soil resistance and tillage depth requirements, and making gear switching faster.

Description

Technical Field

[0001] This utility model relates to the field of micro-tiller technology, specifically a multi-speed adjustment device for micro-tillers. Background Technology

[0002] A mini tiller is a small agricultural machine powered by a small diesel or gasoline engine, equipped with a transmission system, tillage blades, and a walking mechanism. It is mainly used for rotary tillage, weeding, and ditching. It is one of the important tools for modern agriculture's precision and high-efficiency production. With the continuous improvement of agricultural mechanization, the application of mini tillers in rural areas is becoming increasingly widespread, and the requirements for their functionality, reliability, and ease of operation are also gradually increasing.

[0003] Most mini tillers on the market use a mechanical gear speed control structure, which is cumbersome to operate and requires manual adjustment after stopping the machine. This is inefficient, and frequent gear switching in complex field environments can easily burden the user. The speed range is limited, making it difficult to adapt to the diverse needs of different soil conditions, crop types, and tillage depths, thus failing to improve user experience and work efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a multi-speed adjustment device for a micro-tiller to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A multi-speed control device for a micro-tiller, including a speed control box, and further comprising:

[0007] The transmission tube includes an input shaft and an output shaft inside the speed control box. Both ends of the output shaft extend out of the speed control box and are equipped with connecting flanges. Multiple gears are mounted on the input shaft. A rotating tube is rotatably mounted outside the output shaft. A transmission gear is mounted outside the rotating tube. Multiple fixing blocks are mounted on the transmission gear. The transmission tube is sleeved on the output shaft. A keyway is opened inside the transmission tube. A transmission key that mates with the keyway is mounted on the output shaft.

[0008] A fixed plate is provided on the transmission tube, and a transmission block that cooperates with the fixed block is provided on the transmission tube. An installation groove is provided on the inner wall of the speed control box. A support plate is slidably arranged inside the installation groove. A fixed plate is provided between the two support plates. The fixed plate is rotatably connected to the transmission tube.

[0009] The adjustment mechanism, located inside the speed control box, can drive the fixed plate and the transmission tube to move horizontally.

[0010] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0011] In one alternative: the adjusting mechanism includes a pressure plate, a push rod, and a guide block. The top of the speed control box has a guide groove, the pressure plate is slidably disposed inside the guide groove, the top of the pressure plate has a push rod, the outside of the fixed plate has a guide block, and the guide block has an inclined groove that cooperates with the pressure plate.

[0012] In one alternative: a fixing rod is provided inside the mounting groove, and a return spring is sleeved on the outside of the fixing rod, with both ends of the return spring connected to the support plate.

[0013] In one alternative: the top of the speed control box is provided with multiple nameplates, and the connecting flange is provided with multiple mounting holes.

[0014] In one alternative: the sidewall of the transmission tube is provided with a groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The multi-speed adjustment device of the mini tiller drives the fixed plate and transmission tube to move horizontally through the adjustment mechanism. After the transmission block contacts the fixed block on the transmission gear, the power of the transmission gear is transmitted to the transmission tube through the fixed block and the transmission block, which drives the output shaft to rotate. By switching the engagement of different gears, multiple speed outputs of the output shaft can be achieved, thereby meeting the speed adjustment needs of the mini tiller under different working conditions, adapting to different soil resistance and tillage depth requirements, making gear switching faster, and making operation simple and labor-saving. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the multi-speed adjustment device for a micro-tiller.

[0018] Figure 2 This is a cross-sectional view of the speed control box in the multi-speed control device of a mini tiller.

[0019] Figure 3 This is a schematic diagram of the input shaft in the multi-speed control device of a micro-tiller.

[0020] Figure 4 This is a schematic diagram of the output shaft in the multi-speed control device of a micro-tiller.

[0021] Figure 5 This is a schematic diagram of the transmission block in the multi-speed adjustment device of a mini tiller.

[0022] Figure 6 This is a schematic diagram of the transmission pipe in the multi-speed control device of a mini tiller.

[0023] Figure reference numerals: 1-Speed ​​control box, 101-Mounting groove, 2-Connecting flange, 3-Input shaft, 4-Output shaft, 5-Guide groove, 6-Pressure plate, 7-Push rod, 8-Nameplate, 9-Gear, 10-Transmission gear, 11-Support plate, 12-Fixing rod, 13-Return spring, 14-Guide block, 141-Inclined groove, 15-Transmission tube, 151-Groove, 152-Keyway, 16-Transmission key, 17-Fixing block, 18-Transmission block, 19-Rotating tube, 20-Fixing plate, 21-Mounting hole. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. In the drawings and description, similar or identical parts are referred to by the same reference numerals, and in practical applications, the shape, thickness, or height of each component may be enlarged or reduced. The embodiments listed in this utility model are merely illustrative and not intended to limit the scope of this utility model. Any obvious modifications or changes made to this utility model do not depart from its spirit and scope.

[0025] In one embodiment, such as Figure 1-6 As shown, a multi-speed control device for a micro-tiller includes a speed control box 1, and also includes:

[0026] The transmission tube 15 houses an input shaft 3 and an output shaft 4 inside the speed control box 1. The input shaft 3 is connected to the power source of the micro-tiller and receives power from the engine. Both ends of the output shaft 4 extend out of the speed control box 1 and are equipped with connecting flanges 2 for mounting and driving the tillage blades. Multiple gears 9 of different specifications are fixedly mounted on the input shaft 3. When the input shaft 3 rotates, it drives all gears 9 to rotate synchronously. A rotating tube 19 is rotatably mounted outside the output shaft 4, and a transmission gear 10 is mounted outside the rotating tube 19. The transmission gear 10 is connected to the output shaft 4. The corresponding gears 9 on the input shaft 3 mesh to form multiple sets of speed-changing gears. The transmission gear 10 is provided with multiple fixed blocks 17. The fixed blocks 17 have chamfers on their sides to facilitate meshing guidance. The output shaft 4 is slidably fitted with a transmission tube 15. The transmission tube 15 has a keyway 152 inside. The output shaft 4 is provided with a transmission key 16 that cooperates with the keyway 152, so that the transmission tube 15 can slide along the axial direction of the output shaft 4 and drive the output shaft 4 to rotate synchronously. The transmission tube 15 is provided with a transmission block 18 that cooperates with the fixed blocks 17.

[0027] The fixed plate 20 has a support plate 11 slidably disposed inside the mounting groove 101, and a fixed plate 20 is disposed between the two support plates 11. The fixed plate 20 is rotatably connected to the transmission pipe 15, and the support plate 11 and the fixed plate 20 can slide along the mounting groove 101.

[0028] The adjustment mechanism is located inside the speed control box 1 and can drive the fixed plate 20 and the transmission tube 15 to move horizontally.

[0029] The multi-speed adjustment device of the mini tiller drives the fixed plate 20 and the transmission tube 15 to move horizontally through the adjustment mechanism, which controls the horizontal movement of a set of transmission tubes 15 inside the speed control box 1. The transmission block 18 on the transmission tube 15 moves axially accordingly. When the transmission block 18 contacts the fixed block 17 on the transmission gear 10, the power of the transmission gear 10 is transmitted to the transmission tube 15 through the fixed block 17 and the transmission block 18. Then, through the cooperation of the keyway 152 and the transmission key 16, the output shaft 4 is driven to rotate. By switching the engagement of different gears, multiple speed outputs of the output shaft 4 can be achieved, thereby meeting the speed adjustment needs of the mini tiller under different working conditions. As an embodiment, the left, right, up, and down positions of the various components shown in the attached figure are only one arrangement method. The specific positions are set according to specific needs.

[0030] In one embodiment, such as Figure 1 As shown, the adjustment mechanism includes a pressure plate 6, a push rod 7, and a guide block 14. The top of the speed control box 1 is provided with a guide groove 5, and a connecting groove is provided between multiple guide grooves 5. The push rod 7 drives the pressure plate 6 to move, so that the pressure plate 6 can move into different guide grooves 5. Each guide groove 5 corresponds to a gear. The pressure plate 6 is slidably arranged inside the guide groove 5. The top of the pressure plate 6 is provided with a push rod 7. The top of the push rod 7 extends upward and is provided with an operating handle. The operator pushes the pressure plate 6 along the guide groove 5 through the push rod 7. The pressure plate 6 slides from the connecting groove into the guide groove 5 corresponding to the target gear. The pressure plate 6 continues to move, and the bottom end contacts the inclined groove 141 on the guide block 14. The pressure is converted into a horizontal thrust through the inclined surface, which pushes the guide block 14 to move horizontally. The guide block 14 drives the fixed plate 20 to move. The fixed plate 20 drives the transmission tube 15 along one end of the axial direction of the output shaft 4. The transmission tube 15 moves closer to the transmission gear 10. The transmission block 18 engages with the fixed block 17 on the target transmission gear 10, thereby realizing the switching of the power transmission path.

[0031] In one embodiment, such as Figure 1-3 As shown, a fixing rod 12 is provided inside the mounting groove 101, and a return spring 13 is sleeved on the outside of the fixing rod 12. Both ends of the return spring 13 are connected to the support plate 11.

[0032] In one embodiment, such as Figure 1 As shown, the top of the speed control box 1 is provided with multiple nameplates 8, and the connecting flange 2 is provided with multiple mounting holes 21.

[0033] In one embodiment, such as Figure 6 As shown, the transmission tube 15 has a groove 151 on its side wall.

[0034] The above embodiments of this utility model provide a multi-speed adjustment device for a micro-tiller. According to the tillage needs, the required speed is selected. The operator drives the pressure plate 6 to move by operating the handle and push rod 7. The pressure plate 6 moves into the connecting groove of the guide groove 5. The push rod 7 is pushed horizontally until the pressure plate 6 moves into the guide groove 5 corresponding to the target speed. The pressure plate 6 is pushed to move along the target guide groove 5. The lower end of the pressure plate 6 presses against the inclined groove 141 of the guide block 14. The guide block 14 moves horizontally, pushing the fixed plate 20 and the transmission tube 15 to move axially in the direction of the transmission gear 10. The transmission block 18 on the transmission tube 15 engages with the fixed block 17 on the target transmission gear 10. The input shaft 3 drives the gear 9 to rotate. The power is transmitted to the fixed block 17 through the meshing transmission gear 10. Finally, the output shaft 4 is driven to rotate through the transmission block 18, the transmission tube 15 and the transmission key 16.

[0035] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A multi-speed control device for a micro-tiller, comprising a speed control box, characterized in that, Also includes: The transmission tube includes an input shaft and an output shaft inside the speed control box. Both ends of the output shaft extend out of the speed control box and are equipped with connecting flanges. Multiple gears are mounted on the input shaft. A rotating tube is rotatably mounted outside the output shaft. A transmission gear is mounted outside the rotating tube. Multiple fixing blocks are mounted on the transmission gear. The transmission tube is sleeved on the output shaft. A keyway is opened inside the transmission tube. A transmission key that mates with the keyway is mounted on the output shaft. A fixed plate is provided on the transmission tube, and a transmission block that cooperates with the fixed block is provided on the transmission tube. An installation groove is provided on the inner wall of the speed control box. A support plate is slidably arranged inside the installation groove. A fixed plate is provided between the two support plates. The fixed plate is rotatably connected to the transmission tube. The adjustment mechanism, located inside the speed control box, can drive the fixed plate and the transmission tube to move horizontally.

2. The multi-speed adjustment device for a micro-tiller according to claim 1, characterized in that, The adjusting mechanism includes a pressure plate, a push rod, and a guide block. The top of the speed control box has a guide groove, and the pressure plate is slidably arranged inside the guide groove. The top of the pressure plate is provided with a push rod. The outside of the fixed plate is provided with a guide block, and the guide block has an inclined groove that cooperates with the pressure plate.

3. The multi-speed adjustment device for a micro-tiller according to claim 2, characterized in that, A fixing rod is provided inside the mounting groove, and a return spring is sleeved on the outside of the fixing rod. Both ends of the return spring are connected to the support plate.

4. The multi-speed adjustment device for a micro-tiller according to claim 1, characterized in that, The top of the speed control box is equipped with multiple nameplates, and the connecting flange has multiple mounting holes.

5. The multi-speed adjustment device for a micro-tiller according to claim 1, characterized in that, The transmission tube has a groove on its side wall.

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