Gearbox for agricultural machinery

Abstract

The gearbox for the agricultural machine comprises a first box body, and a power transmission shaft A, a power transmission shaft B, a power transmission shaft C, a power transmission shaft D, a gear shifting shaft A, a gear shifting shaft B and a walking power output shaft are arranged in the first box body. The power transmission shaft A is in transmission connection with the gear shifting shaft A, the gear shifting shaft A is in transmission connection with the gear shifting shaft B and the power transmission shaft C, the gear shifting shaft B is in transmission connection with the power transmission shaft B or the power transmission shaft D, the power transmission shaft B is in transmission connection with the power transmission shaft D, and the power transmission shaft C is in transmission connection with the walking power output shaft. The stability of the walking mechanism in the walking process can be improved by arranging the gear shifting shaft A, the power transmitted from the gear shifting shaft A is adjusted in the forward direction and the reverse direction by arranging the gear shifting shaft B, and the stability in the working process can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of agricultural machinery, and specifically relates to a gearbox for agricultural machinery. Background Technology

[0002] Gearboxes are widely used in various agricultural machinery, such as lawn mowers, rotary tillers, ditchers, and mulching machines. When operating in the fields, agricultural machinery will encounter various complex situations, so the requirements for gearbox operation under different driving conditions are becoming increasingly higher.

[0003] Currently, the gearboxes used on the market have few gear changes and too many abrupt gear changes, which can easily lead to uneven transmission and poor handling. As a result, agricultural machinery has poor adaptability and reliability when working in the fields, and cannot be used flexibly in complex situations.

[0004] To address this, our company has developed a gearbox for agricultural machinery that can switch between multiple gears and operate flexibly. Utility Model Content

[0005] To address the aforementioned problems, this utility model designs a gearbox for agricultural machinery, comprising a first housing, wherein a power transmission shaft A, a power transmission shaft B, a power transmission shaft C, a power transmission shaft D, a shift shaft A, a shift shaft B, and a travel power output shaft are disposed within the first housing;

[0006] The power transmission shaft A is connected to the shift shaft A. The shift shaft A is connected to the shift shaft B and the power transmission shaft C. The shift shaft B is connected to the power transmission shaft B or the power transmission shaft D. The power transmission shaft B is connected to the power transmission shaft D. The power transmission shaft C is connected to the travel power output shaft.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting the shift shaft A to adjust the speed of the power transmitted to the power transmission shaft A, and then transmitting the adjusted power to the power transmission shaft C and outputting it through the walking power output shaft, the stability of the walking mechanism during walking can be improved. By setting the shift shaft B to adjust the power transmitted from the shift shaft A in the forward and reverse directions, the stability during operation can be improved, and the power can be transmitted smoothly, which is beneficial for farmers to operate agricultural machinery flexibly.

[0008] Furthermore, the power transmission shaft A is provided with gears A1 and A2;

[0009] The shift shaft A is provided with shift gears A1, A2, A3, A4, A5, and A6. Shift gears A2 and A3 are double-toothed and are slidably mounted on the shift shaft A. Shift gear A1 meshes with gear A1. Shift gears A2 and A3 are slidably mounted on the shift shaft A. Shift gear A4 is rotatably connected to the shift shaft A. Shift gears A5 and A6 are rotatably connected to the shift shaft A. Shift gears A5 and A6 are double-toothed. Shift gears A2 and A3 are provided with a first shift fork, and a first shift lever is provided on the first shift fork.

[0010] The shift shaft B is provided with shift gears B1, B2, B3, B4 and B5. Shift gear B4 meshes with shift gear A4, and shift gear B5 meshes with shift gear A5. Shift gear B2 is slidably disposed on the shift shaft B. Shift gear B2 is provided with a second shift fork, and the second shift fork is provided with a second shift lever.

[0011] The power transmission shaft B is equipped with gears B1, B2 and B3;

[0012] The power transmission shaft C is provided with gears C1, C2, C3 and C4. Gear C4 meshes with shift gear A6, and gear C1 meshes with shift gear B1. Gears C1 and C2 are rotatably connected to the power transmission shaft C. Gears C1 and C2 are double-toothed.

[0013] The power transmission shaft D is provided with gears D1 and D2, and gear D2 meshes with gear B3.

[0014] The walking power output shaft is provided with walking power output teeth, and the gear C3 meshes with the walking power output teeth.

[0015] The beneficial effects of adopting the above-mentioned further technical solution are as follows: By transmitting the engine's power to gear A2, the power transmission shaft A is rotated. The rotation of power transmission shaft A, through gear A1, transmits power to shift gear A1, thereby rotating shift shaft A. By adjusting the positions of shift gears A2 and A3 on shift shaft A, shift gear A2 can mesh with shift gear B2, or shift gear A3 can mesh with shift gear B3, or shift gear A3 can engage with shift gear A4, causing shift gear A3 to drive shift gear A4 to rotate. This transmits power at different speeds to shift gear B4, thereby rotating shift shaft B. Through the meshing of shift gear B5 and shift gear A165, shift gears A5 and A6 rotate on shift shaft A, allowing shift gear A6 to transmit power to gear C4. The rotation of the power transmission shaft C transmits power to the walking power output shaft, thereby driving the walking mechanism to travel at different speeds. When the shift shaft B rotates, the position of the shift gear B2 on the shift shaft B is adjusted so that shift gear B2 meshes with gear B1, driving the power transmission shaft B to rotate, or shift gear B2 meshes with gear D1, driving the power transmission shaft D to rotate, which in turn drives the power transmission shaft B to rotate, thus driving the working mechanism to perform work in different directions. The first shift lever moves the first shift fork, causing shift gears A2 and A3 to move on the shift shaft, allowing the agricultural machinery to operate and travel at different speeds, making it convenient for farmers to operate the machinery flexibly in complex terrain. The second shift lever moves the second shift fork, causing shift gear B2 to move on the shift shaft, enabling forward and reverse adjustment of the working direction.

[0016] Furthermore, when the walking speed is the first speed, the shift gear A2 meshes with the shift gear B1;

[0017] When the walking speed is the second speed, the shift gear A3 meshes with the shift gear B3.

[0018] When the walking speed is the third speed, the shift gear A3 and shift gear A4 engage and lock together.

[0019] When the driving position is in neutral, shift gear A2 and shift gear B1 are not meshed, shift gear A3 and shift gear B3 are not meshed, and shift gear A4 and shift shaft A are engaged in free rotation.

[0020] When the vehicle is in reverse gear, the shift gear A3 meshes with the gear C2.

[0021] The beneficial effects of adopting the above-mentioned further technical solution are as follows: When shift gear A2 meshes with shift gear B1 to achieve the first speed, and shift gear A3 meshes with shift gear B3 to achieve the second speed, shift gear A3 and shift gear A4 engage and engage, causing shift gear A3 to drive shift gear A4 to rotate, thereby achieving the third speed. This sequential increase in speed facilitates smooth power transmission. When shift gear A3 meshes with gear C2, gear C1 rotates synchronously, which in turn drives shift shaft B1 to rotate, thereby driving the walking mechanism into reverse gear. When shift gear A2 and shift gear A3 are not meshed with any gear, the walking mechanism is in neutral, which is beneficial for farmers' flexible operation.

[0022] Furthermore, when the operation is forward, the shift gear B2 meshes with gear B1; when the operation is reverse, the shift gear B2 meshes with gear D1.

[0023] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by meshing the shift gear B2 with the gear B1, the operation is forward; by meshing the shift gear B2 with the gear D1, the operation is reverse.

[0024] Furthermore, a power input shaft is provided inside the first housing, and the power input shaft is connected to the power transmission shaft A in a transmission manner;

[0025] The first housing is equipped with a working power output shaft A, which is connected to the power transmission shaft B.

[0026] Preferably, it also includes a second housing, in which a working power output shaft B and a working power output shaft C are provided. One end of the working power output shaft B is engaged with and held by the working power output shaft A, and the working power output shaft B and the working power output shaft C are connected in a transmission manner.

[0027] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by setting a power input shaft, the power of the engine is input to the power transmission shaft A; the power transmission shaft B drives the working power output shaft A to rotate, and then the working power output shaft A drives the working power output shaft B and the working power output shaft C to rotate, thereby outputting the power.

[0028] Furthermore, the power input shaft is provided with power input teeth, and the gear A2 meshes with the power input teeth;

[0029] The working power output shaft A is provided with a working power output tooth A1, a support bearing and a seal, and a power connection cavity is provided inside the working power output shaft A;

[0030] The working power output shaft A is provided with a working power output tooth A1, which meshes with gear B2.

[0031] One end of the working power output shaft B is disposed in the power connection cavity, and the other end of the working power output shaft B is provided with a working power output tooth B1. A bearing is provided on the working power output shaft B.

[0032] The working power output shaft C is provided with a working power output tooth C1, and the working power output tooth B1 meshes with the working power output tooth C1.

[0033] Preferably, the power transmission shaft B and the working power output shaft C are connected by a belt or chain drive;

[0034] Preferably, the working power output shaft A and the working power output shaft B are integrated.

[0035] The beneficial effects of adopting the above-mentioned further technical solution are as follows: Power is input from the engine to the power transmission shaft A through the meshing of the power input gear A2 and the power output gear B2; power output from the first housing is output to the second housing through the meshing of the power output gear B1 and the power output gear C1; power is then transmitted from the power output gear A1 to the power output gear B1, and from the power output gear B1 to the power output gear C1 for further power output; alternatively, it can be connected via belt or chain drive to perform work in different directions; a support bearing is provided on the power output shaft A to support the power output shaft A within the first housing; and a seal is provided to seal the output end of the first housing, preventing oil leakage during disassembly of the first and second housings.

[0036] Furthermore, the shift gear A4 is connected to the shift shaft A via a bearing, and the shift gear A4 is provided with a connecting cavity that engages with and holds the shift gear A3.

[0037] Preferably, a spline is provided on the shift shaft A, and the shift gears A2 and A3 are slidably sleeved on the spline.

[0038] The shift shaft B is provided with a second spline, and the shift gear B2 is slidably sleeved on the second spline.

[0039] More preferably, the diameters of the shift gears A2, A3, and A4 increase sequentially, while the diameters of the shift gears B1, B3, and B4 decrease sequentially.

[0040] The beneficial effects of adopting the above-mentioned further technical solution are as follows: Shift gear A4 is connected to shift shaft A via a bearing, allowing shift gear A4 to idle on shift shaft A in neutral and reverse gear states. Simultaneously, when shift gear A3 moves into the connecting cavity of shift gear A4, it can drive shift gear A4 to rotate synchronously, thus facilitating switching to the third speed, increasing gear changes, avoiding the problem of excessively abrupt gear changes, and ensuring smooth power transmission, which is beneficial for farmers to operate agricultural machinery flexibly. The shift shaft A has a spline one, allowing shift gears A2 and A3 to slide and shift gears A3 on spline one. The shift shaft B has a spline two, allowing shift gear B2 to slide and shift gears B2 on spline two. The diameters of shift gears A2, A3, and A4 increase sequentially, while the diameters of shift gears B1, B3, and B4 decrease sequentially, thus increasing the speed transmitted from shift shaft A to shift shaft B sequentially, which is beneficial for gradual power changes.

[0041] Furthermore, the power input gear, gear A2, gear B2, working power output gear A1, working power output gear B1, working power output gear C1 are bevel gears.

[0042] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by using bevel gears for the power input gear and gear A2, the power input from the gearbox is transmitted through the meshing of bevel gears on two non-parallel shafts, thus ensuring the power input. By using gear B2, working power output gear A1, working power output gear B1, and working power output gear C1, the power output from the gearbox is transmitted through bevel gears on non-parallel shafts, thus ensuring the power output.

[0043] Furthermore, gears A1 and A2 are sequentially arranged from left to right on power transmission shaft A; shift gears A1, A2, A3, A4, A5, and A6 are sequentially arranged from left to right on shift shaft A; shift gears B1, B2, B3, B4, and B5 are sequentially arranged from left to right on shift shaft B; gears B1, B2, and B3 are sequentially arranged from left to right on power transmission shaft B; gears C1, C2, C3, and C4 are sequentially arranged from left to right on power transmission shaft C; and gears D1 and D2 are sequentially arranged from left to right on power transmission shaft D.

[0044] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by setting the gears sequentially from left to right, the gears are arranged in an orderly manner, ensuring efficient and stable power transmission.

[0045] Furthermore, the shift shaft A and shift shaft B are disposed between the power transmission shaft A and the power transmission shaft B, and the power transmission shaft C is disposed between the power transmission shaft A and the travel power output shaft.

[0046] The beneficial effects of adopting the above-mentioned further technical solution are as follows: By setting shift shaft A and shift shaft B on power transmission shaft A and power transmission shaft B, the input power is output from the working mechanism after undergoing speed change adjustment and forward and reverse adjustment, which is conducive to the efficient and stable operation of the working mechanism. By setting power transmission shaft C between power transmission shaft A and travel power output shaft, it is conducive to the output of power from the travel mechanism after speed change.

[0047] Furthermore, the power transmission shafts A, B, C, and D, the shift shaft A, the shift shaft B, and the travel power output shaft are arranged in parallel; the power input shaft is arranged perpendicular to the power transmission shaft A; the power transmission shaft B is arranged perpendicular to the working power output shaft A; and the working power output shaft B is arranged perpendicular to the working power output shaft C.

[0048] The beneficial effects of adopting the above-mentioned further technical solution are as follows: By setting each power transmission shaft, shift shaft and travel power output shaft in parallel, it is beneficial to the smooth transmission of power and the adjustment of power at different speeds. By setting the power input shaft perpendicular to the power transmission shaft A, it ensures the smooth input of power. By setting the power transmission shaft B perpendicular to the working power output shaft A, and setting the working power output shaft B21 perpendicular to the working power output shaft C22, it ensures the smooth output of power. Attached Figure Description

[0049] Figure 1 Schematic diagram of a gearbox for agricultural machinery Figure 1 ;

[0050] Figure 2 Schematic diagram of a gearbox for agricultural machinery Figure 2 ;

[0051] Figure 3 This is a schematic diagram of the shift shaft A structure;

[0052] Figure 4 Schematic diagram of a gearbox for agricultural machinery Figure 3 ;

[0053] Figure 5 A structural diagram showing the cooperation between the main enclosure and the auxiliary enclosure;

[0054] Figure 6 This is a schematic diagram of the structure of shift shaft A;

[0055] Markings in the diagram: 1. First housing; 11. Power input shaft; 111. Power input gear; 12. Power transmission shaft A; 121. Gear A1; 122. Gear A2; 13. Power transmission shaft B; 131. Gear B1; 132. Gear B2; 133. Gear B3; 14. Power transmission shaft C; 141. Gear C1; 142. Gear C2; 143. Gear C3; 144. Gear C4; 15. Power transmission shaft D; 151. Gear D1; 152. Gear D2; 16. Shift shaft A; 161. Shift gear A1; 162. Shift gear A2; 163. Shift gear A3; 164. Shift gear A4; 165. Shift gear A5; 166. Shift gear A6; 167, Spline 1; 168, First shift fork; 169, Connecting cavity; 17, Shift shaft B; 171, Shift gear B1; 172, Shift gear B2; 173, Shift gear B3; 174, Shift gear B4; 175, Shift gear B5; 176, Spline 2; 177, Second shift fork; 18, Travel power output shaft; 181, Travel power output tooth; 19, Working power output shaft; 191, Working power output tooth A1; 192, Support bearing; 193, Seal; 194, Power connection cavity; 2, Second housing; 21, Working power output shaft B; 211, Working power output tooth B1; 22, Working power output shaft C; 221, Working power output tooth C1. Detailed Implementation

[0056] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model.

[0057] This embodiment provides Example 1.

[0058] Please see Figure 1-5 A gearbox for agricultural machinery includes a first housing 1, wherein a power transmission shaft A12, a power transmission shaft B13, a power transmission shaft C14, a power transmission shaft D15, a shift shaft A16, a shift shaft B17, and a travel power output shaft 18 are disposed within the first housing 1;

[0059] The power transmission shaft A12 is connected to the shift shaft A16. The shift shaft A16 is connected to the shift shaft B17 and the power transmission shaft C14. The shift shaft B17 is connected to either the power transmission shaft B13 or the power transmission shaft D15. The power transmission shaft B13 is connected to the power transmission shaft D15. The power transmission shaft C14 is connected to the travel power output shaft 18. By adjusting the speed of the power transmitted to the power transmission shaft A12 via the shift shaft A16, and then transmitting the adjusted power to the power transmission shaft C14, the travel power output shaft 18 outputs the power. This improves the stability of the traveling mechanism during travel. By adjusting the power transmitted from the shift shaft A16 via the shift shaft B17 in both forward and reverse directions, the stability during operation is improved, ensuring smooth power transmission and facilitating flexible operation of the agricultural machinery by farmers.

[0060] The power input shaft 11 is provided with a power input gear 111; the power transmission shaft A12 is provided with gears A1-121 and A2-122, wherein gear A2-122 meshes with the power input gear 111; the shift shaft A16 is provided with shift gears A1-161, A2-162, A3-163, A4-164, A5-165, and A6-166, wherein shift gears A2-162 and A3-163 are double-toothed, and shift gears A2-162 and A3-163 are slidably mounted on the shift shaft A16. Gear A1-161 meshes with gear A1-121. Gears A2-162 and A3-163 are slidably mounted on shift shaft A16. Gear A4-164 is rotatably connected to shift shaft A16. Gears A5-165 and A6-166 are rotatably connected to shift shaft A16. Gears A5-165 and A6-166 are double-toothed. Gears A2-162 and A3-163 are provided with a first shift fork 168, and a first shift lever is provided on the first shift fork 168. Shift shaft B17 is provided with shift gears B1-171 and B2-17... 2. Shift gears B3-173, B4-174, and B5-175, wherein shift gear B4-174 meshes with shift gear A4-164, and shift gear B5-175 meshes with shift gear A5-165; shift gear B2-172 is slidably mounted on shift shaft B17, and shift gear B2-172 is provided with a second shift fork 177, which is provided with a second shift lever; power transmission shaft B13 is provided with gears B1-131, B2-132, and B3-133; power transmission shaft C14 is provided with gears C1-141 and C2-142. Gears C3-143 and C4-144 are provided, with gear C4-144 meshing with shift gear A6-166 and gear C1-141 meshing with shift gear B1-171. Gears C1-141 and C2-142 are rotatably connected to power transmission shaft C14, and gears C1-141 and C2-142 are double-toothed. Power transmission shaft D15 is provided with gears D1-151 and D2-152, with gear D2-152 meshing with gear B3-133. The travel power output shaft 18 is provided with travel power output tooth 181, and gear C3-143 meshes with travel power output tooth 181.

[0061] By transmitting engine power to gear A2-122, the power transmission shaft A12 rotates. The rotation of power shaft A12 then transmits power to shift gear A1-161 via gear A1-121, thereby rotating shift shaft A16. By adjusting the positions of shift gears A2-162 and A3-163 on shift shaft A16, shift gear A2-162 can mesh with shift gear B2-172, or shift gear A3-163 can mesh with shift gear B3-172. 3. Engagement, or by adjusting the engagement between shift gear A3-163 and shift gear A4-164, shift gear A3-163 drives shift gear A4-164 to rotate, thereby transmitting power at different speeds to shift gear B4-174, which in turn drives shift shaft B17 to rotate; through the engagement of shift gear B5-175 and shift gear A5-165, shift gears A5-165 and A6-166 rotate on shift shaft A16, allowing shift gear A6-166 to transmit power to the gears. On C4-144, the power transmission shaft C14 rotates, and the rotation of the power transmission shaft C14 transmits power to the travel power output shaft 18, thereby driving the travel mechanism to travel at different speeds; when the shift shaft B17 rotates, by adjusting the position of the shift gear B2-172 on the shift shaft B17, the shift gear B2-172 meshes with gear B1-131, driving the power transmission shaft B13 to rotate, or the shift gear B2-172 meshes with gear D1-151, driving the power transmission shaft D15 to rotate, and then... The first shift lever drives the power transmission shaft B13 to rotate, thereby driving the working mechanism to perform work in different directions; the first shift lever drives the first shift fork 168 to move, thereby causing the shift gears A2-162 and A3-163 to move on the shift shaft, enabling the agricultural machinery to work and travel at different speeds, making it convenient for farmers to operate the agricultural machinery flexibly in complex terrain conditions; the second shift lever drives the second shift fork 177 to move, thereby causing the shift gear B2-172 to move on the shift shaft, enabling forward and reverse adjustment of work.

[0062] When the travel speed is the first speed, shift gear A2-162 meshes with shift gear B1-171; when the travel speed is the second speed, shift gear A3-163 meshes with shift gear B3-173; when the travel speed is the third speed, shift gear A3-163 engages with shift gear A4-164; when the travel speed is in neutral, shift gear A2-162 and shift gear B1-171 are not meshed, shift gear A3-163 and shift gear B3-173 are not meshed, and shift gear A4-164 engages with shift shaft A16; when the travel speed is in reverse, shift gear A3-163 meshes with gear C2-142. When shift gear A2-162 meshes with shift gear B1-171, the first speed is achieved. When shift gear A3-163 meshes with shift gear B3-173, the second speed is achieved. Shift gear A3-163 then engages with shift gear A4-164, causing shift gear A3-163 to drive shift gear A4-164 to rotate, thus achieving the third speed. This sequential increase in speed facilitates smooth power transmission. When shift gear A3-163 meshes with gear C2-142, gear C1-141 rotates synchronously, which in turn drives shift shaft B171 to rotate, thus engaging reverse gear in the walking mechanism. When shift gears A2-162 and A3-163 are not engaged with any other gears, the walking mechanism is in neutral, allowing for flexible operation by the farmer.

[0063] When the operation is in forward rotation, the shift gear B2-172 meshes with gear B1-131; when the operation is in reverse rotation, the shift gear B2-172 meshes with gear D1-151. The operation is in forward rotation when shift gear B2-172 meshes with gear B1-131, and in reverse rotation when shift gear B2-172 meshes with gear D1-151.

[0064] The first housing 1 contains a power input shaft 11, which is connected to a power transmission shaft A12. The first housing also contains a working power output shaft A19, which is connected to a power transmission shaft B13. Preferably, the housing further includes a second housing 2, which contains a working power output shaft B21 and a working power output shaft C22. One end of the working power output shaft B21 engages with the working power output shaft A19, and the working power output shaft B21 is connected to the working power output shaft C22. By providing the power input shaft, the engine's power is input to the power transmission shaft A12. The power transmission shaft B13 drives the working power output shaft A19 to rotate, and then the working power output shaft A19 drives the working power output shaft B21 to rotate, thereby outputting the power.

[0065] The power input shaft 11 is provided with a power input tooth 111, and the gear A2-122 meshes with the power input tooth 111; the working power output shaft A19 is provided with a working power output tooth A1-191, a support bearing 192, and a seal 193, and a power connection cavity 194 is provided inside the working power output shaft A19; the working power output shaft A19 is provided with a working power output tooth A1-191, and the working power output tooth A1-191 meshes with the gear B2-132, and the working power output shaft... One end of B21 is disposed in the power connection cavity 194, and the other end of the working power output shaft B21 is provided with a working power output tooth B1-211; the working power output shaft C22 is provided with a working power output tooth C1-221, and the working power output tooth B1-211 meshes with the working power output tooth C1-221; preferably, the power transmission shaft B13 and the working power output shaft C22 are connected by a belt or chain drive; more preferably, the working power output shaft A19 and the working power output shaft B21 are integrated. Power is input from the engine to the power transmission shaft A12 by meshing with the power input gear 111 and the gear A2-122. Power is output from the first housing 1 to the second housing 2 by meshing with the working power output gear A1-191 and the gear B2-132. Power is then transmitted from the working power output gear A2-212 to the working power output gear B1-211 for output, or through belt or chain drive for different directions of operation. A support bearing 192 is provided on the working power output shaft A19 to support the working power output shaft A19 within the first housing 1. A seal 193 is provided to seal the output end of the first housing 1, preventing oil leakage during disassembly of the first housing 1 and the second housing 2.

[0066] The shift gear A4-164 is connected to the shift shaft A16 via a bearing. The shift gear A4-164 is provided with a connecting cavity 169 that engages with and holds the shift gear A3-163. Preferably, the shift shaft A16 is provided with a first spline 167, and the shift gears A2-162 and A3-163 are slidably sleeved on the first spline 167. The shift shaft B17 is provided with a second spline 176, and the shift gear B2-172 is slidably sleeved on the second spline 176. More preferably, the diameters of the shift gears A2-162, A3-163, and A4-164 increase sequentially, while the diameters of the shift gears B1-171, B3-173, and B4-174 decrease sequentially. The shift gear A4-164 is connected to the shift shaft A16 via a bearing, allowing it to idle on the shift shaft A16 in neutral and reverse positions. Simultaneously, when the shift gear A3-163 moves into the connecting cavity 169 of the shift gear A4-164, it drives the shift gear A4-164 to rotate synchronously, facilitating switching to the third speed. This increases gear changes and avoids excessively abrupt gear shifts, resulting in smooth power transmission and allowing farmers to operate the machinery more flexibly. A spline 167 on the shift shaft A16 enables the shift gear... A2-162 and shift gear A3-163 slide on spline 167 for shifting. Spline 176 is provided on shift shaft B17, allowing shift gear B2-172 to slide on spline 176 for shifting. The diameters of shift gears A2-162, A3-163, and A4-164 increase sequentially, while the diameters of shift gears B1-171, B3-173, and B4-174 decrease sequentially. This results in a sequential increase in the speed transmitted from shift shaft A16 to shift shaft B17, which is beneficial for gradual changes in power.

[0067] The power input gear 111, gear A2-122, gear B2-132, and working power output gears A1-191, B1-211, and C1-221 are bevel gears. By using bevel gears 111 and A2-122 as power input gears, the power input from the gearbox is transmitted through the meshing of bevel gears on two non-parallel shafts, ensuring power input even when the direction changes. Similarly, by using bevel gears B2-132, A1-191, B1-211, and C1-221 as bevel gears, the power output from the gearbox is transmitted through bevel gears on non-parallel shafts, ensuring power output.

[0068] Gears A1-121 and A2-122 are sequentially arranged from left to right on the power transmission shaft A12. Shift gears A1-161, A2-162, A3-163, A4-164, A5-165, and A6-166 are sequentially arranged from left to right on the shift shaft A16. Shift gears B1-171, B2-172, B3-173, B4-174, and... Shift gears B5-175 are sequentially arranged from left to right on shift shaft B17; gears B1-131, B2-132, and B3-133 are sequentially arranged from left to right on power transmission shaft B13; gears C1-141, C2-142, C3-143, and C4-144 are sequentially arranged from left to right on power transmission shaft C14; and gears D1-151 and D2-152 are sequentially arranged from left to right on power transmission shaft D15. This sequential arrangement of gears from left to right ensures efficient and smooth power transmission.

[0069] The shift shafts A16 and B17 are positioned between the power transmission shafts A12 and B13, and the power transmission shaft C14 is positioned between the power transmission shaft A12 and the travel power output shaft 18. By positioning the shift shafts A16 and B17 between the power transmission shafts A12 and B13, the input power is adjusted through gear shifting and forward / reverse regulation before being output from the working mechanism, which facilitates efficient and stable operation of the working mechanism. The placement of the power transmission shaft C14 between the power transmission shaft A12 and the travel power output shaft 18 facilitates the output of the shifted power from the travel mechanism.

[0070] The power transmission shafts A12, B13, C14, D15, shift shafts A16 and B17, and the travel power output shaft 18 are arranged in parallel. The power input shaft 11 is perpendicular to the power transmission shaft A12, the power transmission shaft B13 is perpendicular to the working power output shaft A19, and the working power output shaft B21 is perpendicular to the working power output shaft C22. The parallel arrangement of these power transmission shafts, shift shafts, and travel power output shaft 18 facilitates smooth power transmission and adjustment of power at different speeds. The perpendicular arrangement of the power input shaft 11 to the power transmission shaft A12 ensures smooth power input, and the perpendicular arrangement of the power transmission shaft B13 to the working power output shaft A19 and the working power output shafts B21 and C22 ensures smooth power output.

[0071] Work status:

[0072] When traveling at the first speed: the first shift fork 168 controls the shift gear A2-162 to mesh with the shift gear B1-171. The power input shaft 11 transmits power to the power transmission shaft A12 sequentially through the power input gear 111 and gear A2-122. The power transmission shaft A12 transmits power to the shift shaft A16 through gear A1-121 and shift gear A1-161. The shift shaft A16 transmits power to the shift shaft B17 through shift gear A2-162 and shift gear B1-171. The shift shaft B17 transmits power to the shift gear A6-166 through gear B5 and shift gear A5-165. The shift gear A6-166 transmits power to the power transmission shaft C14 through gear C4-144. The power transmission shaft C14 transmits power to the power output shaft 18 through gear C3-143 and traveling power output gear 181, thus achieving the first speed travel.

[0073] When traveling at the second speed: the first shift fork 168 controls the shift gears A3-163 and B3-173 to mesh. The power input shaft 11 transmits power to the power transmission shaft A12 sequentially through the power input gear 111 and gear A2-122. The power transmission shaft A12 transmits power to the shift shaft A16 through gears A1-121 and shift gear A1-161. The shift shaft A16 transmits power to the shift shaft B17 through shift gears A3-163 and B3-173. The shift shaft B17 transmits power to the shift gear A6-166 through gears B5 and A5-165. The shift gear A6-166 transmits power to the power transmission shaft C14 through gear C4-144. The power transmission shaft C14 transmits power to the power output shaft 18 through gear C3-143 and traveling power output gear 181, thus achieving the second speed travel.

[0074] When traveling at the third speed: the first shift fork 168 controls the shift gears A4-164 and B4-174 to mesh. The power input shaft 11 transmits power to the power transmission shaft A12 through the power input gear 111 and gear A2-122. The power transmission shaft A12 transmits power to the shift shaft A16 through gears A1-121 and shift gear A1-161. The shift shaft A16 transmits power to the shift shaft B17 through shift gears A4-164 and B4-174. The shift shaft B17 transmits power to the shift gear A6-166 through gears B5 and A5-165. The shift gear A6-166 transmits power to the power transmission shaft C14 through gear C4-144. The power transmission shaft C14 transmits power to the power output shaft 18 through gear C3-143 and traveling power output gear 181, thus achieving the third speed travel.

[0075] When walking and working are in neutral: shift gear A2-162 and shift gear B1-171 are not engaged, shift gear A3-163 and shift gear B3-173 are not engaged, and shift gear A4-164 rotates freely on shift shaft A16.

[0076] When in reverse gear: the first shift fork 168 controls the shift gear A3-163 to mesh with gear C2-142. The power input shaft 11 transmits power sequentially to the power transmission shaft A12 through the power input gear 111 and gear A2-122. The power transmission shaft A12 then transmits power to the shift shaft A16 through gear A1-121 and shift gear A1-161. The shift shaft A16 then transmits power to the power transmission shaft C14 through shift gear A3-163 and gear C2-142. Power is transmitted from the transmission shaft C14 to the shift shaft B17 via gears C1-141 and B1-171. The shift shaft B17 then transmits power to the shift gear A6-166 via gears B5 and A5-165. The shift gear A6-166 transmits power to the power transmission shaft C14 via gear C4-144. The power transmission shaft C14 then transmits power to the power output shaft 18 via gear C3-143 and the travel power output gear 181, thus achieving the third speed travel.

[0077] When the operation is in forward rotation: the second shift fork 177 controls the shift gear B2 to mesh with the gear B1-131. Power is transmitted through the shift shaft A16 to the shift shaft B17, and then through the shift gears B2-172 and B1-131 to the power transmission shaft B13. The power transmission shaft B13 transmits power to the working power output shaft A19 through the gears B2-132 and the working power output gear A1-191. The working power output shaft A19, through a locking or integrated design with the working power output shaft B21, transmits power to the working power output shaft B21. The working power output shaft B21 then transmits power to the working power output shaft C22 through the working power output gears B1-211 and C1-221.

[0078] When the operation is in reverse: the second shift fork 177 controls the shift gear B3 to mesh with gear D1-151. Power is transmitted through shift shaft A16 to shift shaft B17, and then through shift gear B3-173 and gear D1-151 to power transmission shaft D15. Power transmission shaft D15 transmits power through gear D2-152 and gear B3-133 to power transmission shaft B13. Power transmission shaft B13 transmits power through gear B2-132 and working power output gear A1-191 to working power output shaft A19. Working power output shaft A19, through a locking or integrated design with working power output shaft B21, transmits power to working power output shaft B21. Working power output gears B1-211 and C1-221 transmit power from working power output shaft B21 to working power output shaft C22.

[0079] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A gearbox for agricultural machines, characterized in that: Includes a first housing (1), which contains a power transmission shaft A (12), a power transmission shaft B (13), a power transmission shaft C (14), a power transmission shaft D (15), a shift shaft A (16), a shift shaft B (17), and a travel power output shaft (18). The power transmission shaft A (12) is connected to the shift shaft A (16), the shift shaft A (16) is connected to the shift shaft B (17) and the power transmission shaft C (14), the shift shaft B (17) is connected to the power transmission shaft B (13) or the power transmission shaft D (15), the power transmission shaft B (13) is connected to the power transmission shaft D (15), and the power transmission shaft C (14) is connected to the walking power output shaft (18).

2. The gearbox for agricultural machines according to claim 1, characterized in that: The power transmission shaft A (12) is provided with gear A1 (121) and gear A2 (122). The shift shaft A (16) is provided with shift gears A1 (161), A2 (162), A3 (163), A4 (164), A5 (165), and A6 (166). Shift gears A2 (162) and A3 (163) are double-toothed. Shift gears A2 (162) and A3 (163) are slidably mounted on the shift shaft A (16). The shift gears A1 (…)… 161) meshes with gear A1 (121), the shift gear A4 (164) is rotatably connected to shift shaft A (16), the shift gear A5 (165) and shift gear A6 (166) are rotatably connected to shift shaft A (16), the gear A5 and shift gear A6 (166) are double teeth, the shift gear A2 (162) and shift gear A3 (163) are provided with a first shift fork (168), and the first shift fork (168) is provided with a first shift lever; The shift shaft B (17) is provided with shift gears B1 (171), B2 (172), B3 (173), B4 (174) and B5 (175). Shift gear B4 (174) meshes with shift gear A4 (164), and shift gear B5 (175) meshes with shift gear A5 (165). Shift gear B2 (172) is slidably disposed on the shift shaft B (17). Shift gear B2 (172) is provided with a second shift fork (177), and the second shift fork (177) is provided with a second shift lever. The power transmission shaft B (13) is provided with gears B1 (131), B2 (132) and B3 (133). The power transmission shaft C (14) is provided with gears C1 (141), C2 (142), C3 (143) and C4 (144). Gear C4 (144) meshes with shift gear A6 (166), and gear C1 (141) meshes with shift gear B1 (171). Gears C1 (141) and C2 (142) are rotatably connected to the power transmission shaft C (14). Gears C1 (141) and C2 (142) are double-toothed. The power transmission shaft D (15) is provided with gear D1 (151) and gear D2 (152), and gear D2 (152) meshes with gear B3 (133); The walking power output shaft (18) is provided with a walking power output tooth (181), and the gear C3 (143) meshes with the walking power output tooth (181).

3. The gearbox for agricultural machines according to claim 2, characterized in that: When the walking speed is the first speed, the shift gear A2 (162) meshes with the shift gear B1 (171); When the walking speed is the second speed, the shift gear A3 (163) meshes with the shift gear B3 (173); When the walking speed is the third speed, the shift gear A3 (163) and shift gear A4 (164) engage and lock together; When the driving gear is in neutral, the shift gear A2 (162) and shift gear B1 (171) are not meshed, the shift gear A3 (163) and shift gear B3 (173) are not meshed, and the shift gear A4 (164) and shift shaft A (16) are engaged in free rotation. When the driving gear is in reverse, the shift gear A3 (163) meshes with the gear C2 (142).

4. The gearbox for agricultural machines according to claim 2, characterized in that: The first housing (1) is provided with a power input shaft (11), which is connected to the power transmission shaft A (12) for transmission. The first housing (1) is provided with a working power output shaft A (19), which is connected to the power transmission shaft B (13) in a transmission connection. When the operation is in forward rotation, the shift gear B2 (172) meshes with the gear B1 (131); When the operation is reversed, the shift gear B2 (172) meshes with the gear D1 (151).

5. The gearbox for agricultural machines according to claim 4, characterized in that: It also includes a second housing (2), in which a working power output shaft B (21) and a working power output shaft C (22) are provided. One end of the working power output shaft B (21) is engaged with the working power output shaft A (19), and the working power output shaft B (21) and the working power output shaft C (22) are connected in a transmission manner.

6. The gearbox for agricultural machines according to claim 5, characterized in that: The power input shaft (11) is provided with a power input tooth (111), and the gear A2 (122) meshes with the power input tooth (111); The working power output shaft A (19) is provided with a working power output tooth A1 (191), a support bearing (192) and a seal (193), and a power connection cavity (194) is provided inside the working power output shaft A (19). The working power output shaft A (19) is provided with a working power output tooth A1 (191), which meshes with gear B2 (132); One end of the working power output shaft B (21) is disposed in the power connection cavity (194), and the other end of the working power output shaft B (21) is provided with a working power output tooth B1 (211). The working power output shaft C (22) is provided with a working power output tooth C1 (221), and the working power output tooth B1 (211) meshes with the working power output tooth C1 (221).

7. The gearbox for agricultural machines according to claim 6, characterized in that: The power transmission shaft B (13) and the working power output shaft C (22) are connected by belt or chain drive.

8. The gearbox for agricultural machines according to claim 7, characterized in that: The working power output shaft A (19) and the working power output shaft B (21) are integrated.

9. The gearbox for agricultural machines according to claim 2, characterized in that: The shift gear A4 (164) is connected to the shift shaft A (16) via a bearing, and the shift gear A4 (164) is provided with a connecting cavity (169) that engages with the shift gear A3 (163).

10. The agricultural machinery gearbox according to claim 9, characterized in that: The shift shaft A (16) is provided with a spline one (167), and the shift gears A2 (162) and A3 (163) are slidably sleeved on the spline one (167); The shift shaft B (17) is provided with a spline 2 (176), and the shift gear B2 (172) is slidably sleeved on the spline 2 (176).

11. The gearbox for agricultural machines according to claim 10, characterized in that: The diameters of the shift gears A2 (162), A3 (163), and A4 (164) increase sequentially, while the diameters of the shift gears B1 (171), B3 (173), and B4 (174) decrease sequentially.

12. The gearbox for agricultural machines according to claim 6, characterized in that: The power input gear (111), gear A2 (122), gear B2 (132), working power output gear A1 (191), working power output gear B1 (211), and working power output gear C1 (221) are bevel gears.

13. The gearbox for agricultural machines according to claim 2, characterized in that: Gears A1 (121) and A2 (122) are sequentially arranged from left to right on the power transmission shaft A (12). Shift gears A1 (161), A2 (162), A3 (163), A4 (164), A5 (165), and A6 (166) are sequentially arranged from left to right on the shift shaft A (16). Shift gears B1 (171), B2 (172), B3 (173), B4 (174), and A6 (176) are sequentially arranged from left to right on the shift shaft A (16). Gear B5 (175) is arranged sequentially from left to right on shift shaft B (17), gears B1 (131), B2 (132) and B3 (133) are arranged sequentially from left to right on power transmission shaft B (13), gears C1 (141), C2 (142), C3 (143) and C4 (144) are arranged sequentially from left to right on power transmission shaft C (14), and gears D1 (151) and D2 (152) are arranged sequentially from left to right on power transmission shaft D (15).

14. The gearbox for agricultural machines according to claim 1, characterized in that: The shift shaft A (16) and shift shaft B (17) are located between the power transmission shaft A (12) and the power transmission shaft B (13), and the power transmission shaft C (14) is located between the power transmission shaft A (12) and the travel power output shaft (18).

15. The gearbox for agricultural machines according to claim 4, characterized in that: The power transmission shafts A (12), B (13), C (14), D (15), A (16), B (17), and the walking power output shaft (18) are arranged in parallel. The power input shaft (11) is arranged perpendicular to the power transmission shaft A (12). The power transmission shaft B (13) is arranged perpendicular to the working power output shaft A (19). The working power output shaft B (21) is arranged perpendicular to the working power output shaft C (22).

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