Speed change structure of mini-tiller

Abstract

The utility model relates to the technical field of mini-tillers, in particular to a mini-tiller speed change structure which comprises a machine shell, a driving assembly and a gear shifting assembly. The gear shifting assembly comprises a first driving shaft, a first driving gear, a second driving gear, a first fixing shaft, a first transmission gear, a second transmission gear, a first working shaft, a second working shaft, a first gear shifting rod and a first transmission component, when rotary tillage operation needs to be carried out, the furrow opener is replaced with a rotary blade, and the gear shifting rod is rotated to drive the first driving gear to move; due to the fact that the diameter of the second driving gear is small, the rotating speed of the second transmission gear is reduced, the torque of the second transmission gear is increased, and then the rotating speed of the first working shaft is reduced, and the torque of the first working shaft is increased so as to adapt to rotary tillage operation of the rotary blade. Therefore, the purpose that the mini-tiller can work according to different working conditions is achieved.

Description

Technical Field

[0001] This utility model relates to the field of micro-tiller technology, and in particular to a micro-tiller transmission structure. Background Technology

[0002] In the process of modern agricultural mechanization, mini tillers, as a lightweight and efficient agricultural machine, are widely used in various operations such as rotary tillage, ditching, and land preparation in farmland. In the design of traditional mini tillers, the working shaft and drive shaft usually adopt a fixed configuration, that is, a certain model of mini tiller is often only suitable for one or a limited number of working conditions, such as being specifically used for rotary tillage or ditching.

[0003] This fixed configuration limits the functionality and flexibility of micro-tillers, requiring farmers or agricultural cooperatives to purchase multiple micro-tillers of different types to meet different operational needs, thereby increasing cost burden and wasting resources. Utility Model Content

[0004] The purpose of this invention is to provide a transmission structure for a micro-tiller, which solves the problem that existing micro-tillers cannot adapt to different working conditions.

[0005] To achieve the above objectives, this utility model provides a micro-tiller transmission structure, including a housing and a drive assembly. The drive assembly is disposed inside the housing and also includes a shifting assembly. The shifting assembly includes a first drive shaft, a first drive gear, a second drive gear, a first fixed shaft, a first transmission gear, a second transmission gear, a first working shaft, a second working shaft, a first shift lever, and a first transmission component. The first drive shaft is rotatably mounted inside the housing. The first drive gear is slidably mounted on the first drive shaft. The second drive gear is slidably mounted on the first drive shaft and fixedly connected to the first drive gear. The first fixed shaft is rotatably mounted inside the housing. The first transmission gear is fixedly connected to the first fixed shaft and sleeved on the first fixed shaft. The second transmission gear is fixedly connected to the first fixed shaft and sleeved on the first fixed shaft. The first working shaft is rotatably mounted on the housing. The second working shaft is rotatably mounted on the housing. The first shift lever is rotatably connected to the housing and connected to the first drive gear, and is located on one side of the housing. The first transmission component is disposed on the first fixed shaft.

[0006] The shifting assembly further includes a second drive shaft, a third drive gear, a fourth drive gear, a second shift lever, a second fixed shaft, a third transmission gear, and a fourth transmission gear. The second drive shaft is rotatably mounted inside the housing. The third drive gear is slidably connected to the second drive shaft and sleeved on the second drive shaft. The fourth drive gear is slidably connected to the second drive shaft and fixedly connected to the third drive gear. The second fixed shaft is rotatably mounted inside the housing. The third transmission gear is fixedly connected to the second fixed shaft. The fourth transmission gear is fixedly connected to the second fixed shaft.

[0007] The first shift lever includes a lever body, a rotating seat, a connecting rod, and a shift fork. The rotating seat is rotatably connected to the housing and located on one side of the housing. The lever body is fixedly connected to the rotating seat and is disposed on the rotating seat. The connecting rod is movably connected to the rotating seat and passes through the housing. The shift fork is fixedly connected to the connecting rod and connected to the first drive gear, and is located on the side of the connecting rod away from the rotating seat.

[0008] The first transmission component includes a first sprocket, a second sprocket, and a chain. The first sprocket is fixedly connected to the first fixed shaft and is sleeved on the first fixed shaft. The second sprocket is fixedly connected to the first working shaft and is sleeved on the first working shaft. The chain is connected to the first sprocket and the second sprocket respectively and is sleeved on both sides of the first sprocket and the second sprocket.

[0009] The drive assembly includes a power shaft, a first power gear, a second power gear, and a gear set. The power shaft is rotatably mounted on the housing and passes through the housing. The first power gear is fixedly mounted on one end of the power shaft. The second power gear is rotatably mounted inside the housing and meshes with the first power gear. The gear set is disposed inside the housing and drives the first drive shaft and the second drive shaft to rotate.

[0010] This utility model discloses a transmission structure for a micro-tiller. In use, the ditch opener is first installed on the first working shaft. Rotating the first shift lever drives the first drive gear to move. The first drive gear drives the second drive gear to move, causing the first drive gear to mesh with the first transmission gear, while the second drive gear disengages from the second transmission gear. At this time, the drive assembly drives the first drive shaft to rotate, which in turn drives the first drive gear to rotate. The first drive gear drives the first transmission gear to rotate, which in turn drives the first fixed shaft to rotate. Power is output to the first working shaft through the first transmission component, enabling the first working shaft to drive... The ditcher rotates to perform ditching operations. Because the first drive gear has a large diameter, the first transmission gear, the first fixed shaft, and the first working shaft rotate at relatively high speeds, thus adapting to the ditching operation. When rotary tillage is required, the ditcher is replaced with a rotary tiller blade, and the first shift lever is rotated to drive the first drive gear to move, causing the first drive gear to disengage from the first transmission gear, while the second drive gear meshes with the second transmission gear. Because the second drive gear has a smaller diameter, the speed of the second transmission gear decreases and the torque increases, which in turn decreases the speed of the first working shaft and increases the torque, adapting to the rotary tillage operation of the rotary tiller blade. This achieves the goal of enabling the micro-tiller to adapt to different working conditions. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0012] Figure 1 This is a schematic diagram of the overall structure of the micro-tiller transmission structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the shifting assembly of this utility model.

[0014] Figure 3 This is the utility model Figure 2 Enlarged view of point A.

[0015] Figure 4 This is a schematic diagram of the installation structure of the first drive gear of this utility model.

[0016] Figure 5 This is a schematic diagram of the installation structure of the third transmission gear of this utility model.

[0017] In the diagram: 101-House, 102-Drive assembly, 103-Shift assembly, 104-First drive shaft, 105-First drive gear, 106-Second drive gear, 107-First fixed shaft, 108-First transmission gear, 109-Second transmission gear, 110-First working shaft, 111-Second working shaft, 112-First shift lever, 113-First transmission component, 114-Second drive shaft, 115-Third drive gear, 116-Fourth drive gear 117-Second shift lever, 118-Second fixed shaft, 119-Third transmission gear, 120-Fourth transmission gear, 121-Shaft sleeve, 122-Second shift lever, 123-Lever body, 124-Rotating seat, 125-Connecting rod, 126-Shift fork, 127-First sprocket, 128-Second sprocket, 129-Chain, 130-Second transmission component, 131-Drive shaft, 132-First drive gear, 133-Second drive gear, 134-Gear set. Detailed Implementation

[0018] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0019] Please see Figures 1 to 5 ,in Figure 1 This is a schematic diagram of the overall structure of the transmission mechanism of a micro-tiller. Figure 2 This is a structural diagram of the gear shift assembly. Figure 3 yes Figure 2 Enlarged view of point A, Figure 4 This is a schematic diagram of the installation structure of the first drive gear. Figure 5 This is a schematic diagram of the installation structure of the third transmission gear.

[0020] This utility model provides a transmission structure for a micro-tiller, including a housing 101, a drive assembly 102, and a shift assembly 103. The shift assembly 103 includes a first drive shaft 104, a first drive gear 105, a second drive gear 106, a first fixed shaft 107, a first transmission gear 108, a second transmission gear 109, a first working shaft 110, a second working shaft 111, a first shift lever 112, a first transmission component 113, a second drive shaft 114, a third drive gear 115, a fourth drive gear 116, a second shift lever 117, a second fixed shaft 118, a third transmission gear 119, and a fourth transmission gear 120. The first shift lever 112 includes a lever body 123, a rotating seat 124, a connecting rod 125, and a shift fork 126. The first transmission component 113... The drive assembly 102 includes a first sprocket 127, a second sprocket 128, and a chain 129. It also includes a drive shaft 131, a first drive gear 132, a second drive gear 133, and a gear set 134. Rotating the first shift lever 112 causes the first drive gear 105 and the second drive gear 106 to move on the first drive shaft 104, thereby engaging the first drive gear 105 with the first transmission gear 108, or engaging the second drive gear 106 with the second transmission gear 109. This adjusts the speed and torque of the first working shaft 110 to adapt to different working conditions. It is understood that the aforementioned solution can be used to adapt the tiller to different working conditions, and also to adjust the speed and torque of the second working shaft 111.

[0021] In this specific embodiment, the first drive shaft 104 is rotatably mounted inside the housing 101. The first drive gear 105 is slidably mounted on the first drive shaft 104. The second drive gear 106 is slidably mounted on the first drive shaft 104 and fixedly connected to the first drive gear 105. The first fixed shaft 107 is rotatably mounted inside the housing 101. The first transmission gear 108 is fixedly connected to the first fixed shaft 107 and sleeved on the first fixed shaft 107. The second transmission gear 109 is fixedly connected to the first fixed shaft 107 and sleeved on the first fixed shaft 107. The first working shaft 110 is rotatably mounted on the housing 101. The second working shaft 111 is rotatably mounted on the housing 101. The first shift lever 112 is rotatably connected to the housing 101 and connected to the first drive gear 105, and is located on one side of the housing 101. The first transmission component 113 is disposed on the first fixed shaft 101. On the fixed shaft 107; by rotating the first shift lever 112, the first drive gear 105 is moved, which in turn drives the second drive gear 106 to move. The drive assembly 102 can drive the first drive shaft 104 to rotate. The first transmission member 113 is used to output the power of the first fixed shaft 107 to the first working shaft 110. The first working shaft 110 and the second working shaft 111 can be equipped with moving wheels or different tools (such as rotary tillers or furrow openers). The meshing transmission ratio of the first drive gear 105 and the first transmission gear 108 is different from the meshing transmission ratio of the second drive gear 106 and the second transmission gear 109. When the first drive gear 105 meshes with the first transmission gear 108, the second drive gear 106 and the second transmission gear 109 are misaligned. Similarly, when the second drive gear 106 meshes with the second transmission gear 109, the first drive gear 105 and the first transmission gear 108 are misaligned.

[0022] In use, the trencher is first installed on the first working shaft 110. Rotating the first shift lever 112 drives the first drive gear 105 to move. The first drive gear 105 drives the second drive gear 106 to move, causing the first drive gear 105 to mesh with the first transmission gear 108, while the second drive gear 106 disengages from the second transmission gear 109. At this time, the drive assembly 102 drives the first drive shaft 104 to rotate, which in turn drives the first drive gear 105 to rotate. The first drive gear 105 drives the first transmission gear 108 to rotate, and the first transmission gear 108 drives the first fixed shaft 107 to rotate. Power is output to the first working shaft 110 through the first transmission component 113, enabling the first working shaft 110 to drive... The ditch opener rotates to perform ditching operations. Because the first drive gear 105 has a large diameter, the first transmission gear 108, the first fixed shaft 107, and the first working shaft 110 rotate at relatively high speeds, thus adapting to the ditching operation. When rotary tillage is required, the ditch opener is replaced with a rotary tiller blade, and the first shift lever 112 is rotated to drive the first drive gear 105 to move, causing the first drive gear 105 to disengage from the first transmission gear 108. Meanwhile, the second drive gear 106 meshes with the second transmission gear 109. Because the second drive gear 106 has a smaller diameter, the second transmission gear 109 rotates at a lower speed and increases in torque, which in turn reduces the speed of the first working shaft 110 and increases in torque, adapting to the rotary tillage operation of the rotary tiller blade. This achieves the goal of enabling the micro-tiller to adapt to different working conditions.

[0023] The second drive shaft 114 is rotatably mounted inside the housing 101; the third drive gear 115 is slidably connected to the second drive shaft 114 and sleeved on the second drive shaft 114; the fourth drive gear 116 is slidably connected to the second drive shaft 114 and fixedly connected to the third drive gear 115; the second fixed shaft 118 is rotatably mounted inside the housing 101; the third transmission gear 119 is fixedly connected to the second fixed shaft 118; the fourth transmission gear 120 is fixedly connected to the second fixed shaft 118; a second transmission component 130 is provided on the second fixed shaft 118, which is used to output the power of the second fixed shaft 118 to the second working shaft 111, thereby causing the second working shaft 111 to rotate; the third drive gear 115 and the fourth drive gear 116... The two are fixedly connected by a bushing 121. A second shift lever 117 is also rotatably mounted on the housing 101. The second shift lever 117 is also connected to the bushing 121. When the third drive gear 115 meshes with the third transmission gear 119, the fourth drive gear 116 is disengaged from the fourth transmission gear 120, and vice versa. By rotating the second shift lever 117, the bushing 121 is moved, which in turn moves the third drive gear 115 and the fourth drive gear 116, realizing the meshing of the third drive gear 115 with the third transmission gear 119 or the meshing of the fourth drive gear 116 with the fourth transmission gear 120, thereby adjusting the speed and torque of the second working shaft 111 to adapt to different working conditions. The specific shifting operation is the same as that of the first working shaft 110, the difference being the installation position and the transmission ratio between the gears.

[0024] Furthermore, although the first working shaft 110 is used as the power output shaft of a tool such as a furrow opener or rotary tiller in the description of this utility model, the second working shaft 111 can also be used as the power output shaft of a tool according to actual needs, so as to achieve more functions and greater flexibility.

[0025] Secondly, the rotating seat 124 is rotatably connected to the housing 101 and is located on one side of the housing 101; the rod 123 is fixedly connected to the rotating seat 124 and is disposed on the rotating seat 124; the connecting rod 125 is movably connected to the rotating seat 124 and passes through the housing 101; the shift fork 126 is fixedly connected to the connecting rod 125 and connected to the first drive gear 105, and is located on the side of the connecting rod 125 away from the rotating seat 124; the operator rotates the rod 123 to drive the rotating seat 124 to rotate, thereby causing the rotating seat 124 to drive the connecting rod 125 to move, and the connecting rod 125 to drive the shift fork 126 to move, thereby driving the first drive gear 105 to move; the structure of the second shift lever 117 is the same as the structure of the first shift lever 112, and the structure of the second shift lever 117 will not be described in detail here.

[0026] Meanwhile, the first sprocket 127 is fixedly connected to the first fixed shaft 107 and sleeved on the first fixed shaft 107; the second sprocket 128 is fixedly connected to the first working shaft 110 and sleeved on the first working shaft 110; the chain 129 is connected to the first sprocket 127 and the second sprocket 128 respectively, and sleeved on both sides of the first sprocket 127 and the second sprocket 128; when the first fixed shaft 107 rotates, it drives the first sprocket 127 to rotate, thereby driving the chain 129 to rotate, and the chain 129 drives the first working shaft 110 to rotate, thereby driving the tool to rotate; the structure of the second transmission component 130 is the same as that of the first transmission component 113, and will not be described in detail here.

[0027] In addition, the power shaft 131 is rotatably mounted on the housing 101 and passes through the housing 101; the first power gear 132 is fixedly mounted on one end of the power shaft 131; the second power gear 133 is rotatably mounted inside the housing 101 and meshes with the first power gear 132; the gear set 134 is disposed inside the housing 101 and drives the first drive shaft 104 and the second drive shaft 114 to rotate; the power shaft 131 is connected to the output end of the micro-tiller engine, and the micro-tiller engine drives the power shaft 131 to rotate, thereby driving the first power gear 132 to rotate, the first power gear 132 drives the second power gear 133 to rotate, the second power gear 133 transmits power to the gear set 134, and through the gears on the gear set 134, outputs power to the first drive shaft 104 and the second drive shaft 114 respectively, so as to achieve the purpose of driving the first drive shaft 104 and the second drive shaft 114 to rotate.

[0028] When using the micro-tiller transmission structure of this embodiment, rotating the first shift lever 112 and the second shift lever 117 drives the first drive gear 105, the second drive gear 106, the third drive gear 115, and the fourth drive gear 116 to move, thereby adjusting the speed and torque of the first working shaft 110 and the second working shaft 111. The first working shaft 110 and the second working shaft 111 of this invention both have independent transmission capabilities, which can adapt to different working tools and conditions. Different tools can also be selected to be installed on the first working shaft 110 or the second working shaft 111. The idle working shaft is used to install moving wheels, facilitating the overall movement of the micro-tiller. By providing independent transmission capabilities and flexible tool installation options, the micro-tiller transmission structure of this invention greatly improves the multifunctionality and operating efficiency of the micro-tiller. It not only meets the needs of different working tools and conditions but also allows for flexible adjustment and optimization according to specific operating environments and soil conditions.

[0029] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A transmission structure for a micro-tiller, comprising a housing and a drive assembly, wherein the drive assembly is disposed inside the housing, characterized in that, It also includes the gear shifting assembly; The shifting assembly includes a first drive shaft, a first drive gear, a second drive gear, a first fixed shaft, a first transmission gear, a second transmission gear, a first working shaft, a second working shaft, a first shift lever, and a first transmission component. The first drive shaft is rotatably mounted inside the housing. The first drive gear is slidably mounted on the first drive shaft. The second drive gear is slidably mounted on the first drive shaft and fixedly connected to the first drive gear. The first fixed shaft is rotatably mounted inside the housing. The first transmission gear is fixedly connected to the first fixed shaft and sleeved on the first fixed shaft. The second transmission gear is fixedly connected to the first fixed shaft and sleeved on the first fixed shaft. The first working shaft is rotatably mounted on the housing. The second working shaft is rotatably mounted on the housing. The first shift lever is rotatably connected to the housing and connected to the first drive gear, and is located on one side of the housing. The first transmission component is disposed on the first fixed shaft.

2. The micro-tiller transmission structure as described in claim 1, characterized in that, The shifting assembly further includes a second drive shaft, a third drive gear, a fourth drive gear, a second shift lever, a second fixed shaft, a third transmission gear, and a fourth transmission gear. The second drive shaft is rotatably mounted inside the housing. The third drive gear is slidably connected to the second drive shaft and sleeved on the second drive shaft. The fourth drive gear is slidably connected to the second drive shaft and fixedly connected to the third drive gear. The second fixed shaft is rotatably mounted inside the housing. The third transmission gear is fixedly connected to the second fixed shaft. The fourth transmission gear is fixedly connected to the second fixed shaft.

3. The micro-tiller transmission structure as described in claim 2, characterized in that, The first shift lever includes a lever body, a rotating seat, a connecting rod, and a shift fork. The rotating seat is rotatably connected to the housing and located on one side of the housing. The lever body is fixedly connected to the rotating seat and is disposed on the rotating seat. The connecting rod is movably connected to the rotating seat and passes through the housing. The shift fork is fixedly connected to the connecting rod and connected to the first drive gear, and is located on the side of the connecting rod away from the rotating seat.

4. The micro-tiller transmission structure as described in claim 3, characterized in that, The first transmission component includes a first sprocket, a second sprocket, and a chain. The first sprocket is fixedly connected to the first fixed shaft and is sleeved on the first fixed shaft. The second sprocket is fixedly connected to the first working shaft and is sleeved on the first working shaft. The chain is connected to the first sprocket and the second sprocket respectively and is sleeved on both sides of the first sprocket and the second sprocket.

5. The micro-tiller transmission structure as described in claim 4, characterized in that, The drive assembly includes a drive shaft, a first drive gear, a second drive gear, and a gear set. The drive shaft is rotatably mounted on the housing and passes through the housing. The first drive gear is fixedly mounted on one end of the drive shaft. The second drive gear is rotatably mounted inside the housing and meshes with the first drive gear. The gear set is disposed inside the housing and drives the first drive shaft and the second drive shaft to rotate.

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