Electric gear shifting structure of wheat machine gearbox

Abstract

The utility model discloses an electric gear shifting structure of a wheat machine gearbox and belongs to the technical field of harvester transmission devices. The gear shifting mechanism comprises a speed changing box and a driving mechanism, the driving mechanism drives the speed changing box to shift gears, and the speed changing box has multiple rotating speeds and specifically comprises a speed changing gear shaft, a gear shifting mechanism body and an input shaft. A multi-gear driven gear on the speed change gear shaft is selectively matched and meshed with a multi-gear driving gear on the input shaft under the control of the gear shifting mechanism, power from the input shaft is subjected to speed change, and the changed power is transmitted out for external equipment to work. And the electric cylinder is used for driving the gear shifting mechanism to act, so that the driving gear and the driven gear of the corresponding gear are in meshed transmission. The device has the advantages that the structure is simple, gear shifting operation is convenient and labor-saving, gear shifting response time is consistent, the position of the electric cylinder can be accurately detected, and the effect of accurate gear shifting is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of harvester transmission device, concretely relates to a wheat machine gearbox electric gear shifting structure. BACKGROUND

[0002] The wheat machine needs to adjust the rotating speed and the torque according to different requirements in the operation process. The existence of the wheat machine gearbox can freely adjust the rotating speed and the output torque under different working conditions, thereby improving the operation efficiency.

[0003] At present, the wheat machine walking gearbox needs to rely on manual pushing of the shifting lever for gear shifting, which is laborious and inefficient. The manual gear shifting cannot guarantee smooth and accurate gear engagement every time, and sometimes gear engagement failure and gear disengagement occur. In addition, the gear shifting response time cannot be guaranteed to be consistent every time.

[0004] In view of the above prior art, it is necessary to reasonably improve the existing wheat machine gearbox electric gear shifting structure. Therefore, the applicant has made a beneficial design, and the technical scheme to be introduced below is generated in this background. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses a wheat machine gearbox electric gear shifting structure, which has a simple structure, convenient and labor-saving gear shifting operation, consistent gear shifting response time, accurate detection of the electric cylinder position, and accurate gear shifting effect.

[0006] The utility model discloses a wheat machine gearbox electric gear shifting structure, which has a simple structure, convenient and labor-saving gear shifting operation, consistent gear shifting response time, accurate detection of the electric cylinder position, and accurate gear shifting effect.

[0007] In a specific embodiment of the present invention, the speed gear shaft is equipped with an output gear, a Ⅰ gear driven gear, a Ⅱ gear driven gear, a Ⅲ gear driven gear, a Ⅰ gear spline hub, and a Ⅱ-Ⅲ gear spline hub. The output gear, the Ⅰ gear spline hub, and the Ⅱ-Ⅲ gear spline hub are fixedly mounted on the speed gear shaft, and the Ⅰ gear driven gear, the Ⅱ gear driven gear, and the Ⅲ gear driven gear are rotatably mounted on the speed gear shaft; the input shaft is fixed with main gears that mesh with the Ⅰ gear driven gear, the Ⅱ gear driven gear, and the Ⅲ gear driven gear. The shift mechanism includes a Ⅰ-gear shift mechanism and a Ⅱ-Ⅲ-gear shift mechanism; the driving mechanism includes a Ⅰ-gear electric cylinder and a Ⅱ-Ⅲ-gear electric cylinder. The Ⅰ-gear electric cylinder drives the Ⅰ-gear shift mechanism to operate, so that the Ⅰ-gear driven gear and the Ⅰ-gear spline hub rotate synchronously, and the power of the Ⅰ-gear is transmitted; the Ⅱ-Ⅲ-gear electric cylinder drives the Ⅱ-Ⅲ-gear shift mechanism to operate, so that the Ⅱ-gear driven gear and the Ⅱ-Ⅲ-gear spline hub rotate synchronously or the Ⅲ-gear driven gear and the Ⅱ-Ⅲ-gear spline hub rotate synchronously, and the power of the Ⅱ-gear or Ⅲ-gear is transmitted.

[0008] In another specific embodiment of the present invention, the I-gear shift mechanism includes a I-gear shift lever, and the I-gear shift lever drives the I-gear driven gear and the I-gear spline hub to rotate synchronously; the I-gear electric cylinder includes a I-gear electric cylinder body and a I-gear drive rod extending from the I-gear electric cylinder body, and the I-gear drive rod moves synchronously with the I-gear shift lever; the II-III-gear shift mechanism includes a II-III-gear shift lever, and the II-III-gear shift lever drives the II-gear driven gear and the II-III-gear spline hub to rotate synchronously or makes the III-gear driven gear and the II-III-gear spline hub rotate synchronously; the II-III-gear electric cylinder includes a II-III-gear electric cylinder body and a II-III-gear drive rod extending from the II-III-gear electric cylinder body, and the II-III-gear drive rod moves synchronously with the II-III-gear shift lever.

[0009] In another specific embodiment of the present invention, the driving mechanism also includes a I gear connecting rod and a II-III gear connecting rod, and the two ends of the I gear connecting rod are respectively fixedly connected to the I gear drive rod and the I gear shift rod; the two ends of the II-III gear connecting rod are respectively fixedly connected to the II-III gear drive rod and the II-III gear shift rod.

[0010] In another specific embodiment of the present invention, the driving mechanism further includes an electric cylinder mounting plate, the I-speed electric cylinder and the II-III-speed electric cylinder are both mounted on the electric cylinder mounting plate, and the electric cylinder mounting plate is fixedly mounted on the gearbox housing.

[0011] In another specific embodiment of the present invention, the outer side of the I-gear electric cylinder is equipped with a I-gear detection switch and a first neutral detection switch for determining the current gear by detecting the position of the I-gear drive rod, and the outer side of the II-III-gear electric cylinder is equipped with a II-gear detection switch, a III-gear detection switch and a second neutral detection switch for determining the current gear by detecting the position of the II-III-gear drive rod.

[0012] In a further specific embodiment of the present invention, a built-in detection element for the I-speed electric cylinder is installed inside the I-speed electric cylinder for providing real-time feedback on the position of the I-speed driving rod; a built-in detection element for the II-III-speed electric cylinder is installed inside the II-III-speed electric cylinder for providing real-time feedback on the position of the II-III driving rod, and a magnetic switch is provided on the outside of the driving mechanism to assist in monitoring the real-time gear position of the gearbox.

[0013] In a more specific embodiment of the present invention, the I-gear shift mechanism also includes a I-gear switch sleeve, the I-gear spline hub and the I-gear driven gear are adjacent, the I-gear driven gear is provided with I-gear mating teeth, the I-gear switch sleeve selectively engages with the I-gear spline hub and the outer ring of the I-gear mating teeth, when the I-gear switch sleeve only engages with the outer ring of the I-gear spline hub, it is in neutral; when the I-gear switch sleeve engages with the I-gear spline hub and the outer ring of the I-gear mating teeth at the same time, the I-gear is on.

[0014] In yet another specific embodiment of the present invention, the II-III gear shift mechanism further includes a II-III gear switch sleeve, the II-III gear spline hub is located between the II gear driven gear and the III gear driven gear, the II gear driven gear is provided with II gear mating teeth, the III gear driven gear is provided with III gear mating teeth, the II-III gear switch sleeve selectively engages with the II gear mating teeth, the II-III gear spline hub and the outer ring of the III gear mating teeth, when the II-III gear switch sleeve is only engaged with the outer ring of the II-III gear spline hub, it is in neutral; when the II-III gear switch sleeve is simultaneously engaged with the II gear mating teeth and the outer ring of the II-III gear spline hub, the II gear is opened; when the II-III gear switch sleeve is simultaneously engaged with the III gear mating teeth and the outer ring of the II-III gear spline hub, the III gear is opened.

[0015] In yet another specific embodiment of the present invention, the I-gear shift mechanism further includes a I-gear shift fork, one end of the I-gear shift fork is inserted into the circumferential surface of the I-gear switch sleeve, and the other end is fixed to the I-gear shift lever, and the I-gear shift lever is slidably set on the case of the transmission; the II-III-gear shift mechanism further includes a II-III-gear shift fork, one end of the II-III-gear shift fork is inserted into the circumferential surface of the II-III-gear switch sleeve, and the other end is fixed to the II-III-gear shift lever, and the II-III-gear shift lever is slidably set on the case of the transmission.

[0016] Due to the adoption of the above structure, the utility model has the following beneficial effects: first, the electric cylinder is used as the power source for shifting gears to drive the shift actuator to shift gears. There is no need to manually push the shift lever. The gear shift can be achieved by simply touching the corresponding button for controlling each gear, which is convenient and labor-saving; second, the electric cylinder is equipped with a gear detection switch to detect whether the gear is shifted in place; third, the stroke setting of each gear of the electric cylinder is consistent, and the action time is the same, ensuring that the response time of each gear shift is consistent; fourth, the gear shift is achieved by controlling the electric cylinder, which simplifies the equipment structure and makes the gearbox small and lightweight; fifth, the built-in detection element in each electric cylinder of the driving mechanism can detect the position of the electric cylinder in real time, so the control accuracy is higher and the gear shift positioning is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the planar structure of the wheat harvester gearbox of the present invention;

[0018] Figure 2 This is a three-dimensional diagram of the wheat harvester gearbox of the present invention;

[0019] Figure 3a This is an enlarged schematic diagram of the installation of an embodiment of the driving mechanism of the present utility model;

[0020] Figure 3b This is an enlarged schematic diagram of the installation of another embodiment of the driving mechanism of the present invention;

[0021] Figure 4 This is a schematic diagram of the wheat harvester gearbox of the present invention when it is in gear position I;

[0022] Figure 5 This is a schematic diagram of the wheat harvester gearbox of the present invention when it is in gear II;

[0023] Figure 6 This is a schematic diagram of the wheat harvester gearbox of the present invention when it is in gear position III.

[0024] In the figure: 1. Speed ​​change gear shaft, 11. Output gear, 12. I gear driven gear, 121. I gear driven gear sleeve, 122. I gear mating gear, 13. II gear driven gear, 131. II gear driven gear sleeve, 132. II gear mating gear, 14. III gear driven gear, 141. III gear driven gear sleeve, 142. III gear mating gear, 15. I gear spline hub, 16. II-III gear spline hub; 2. Shift mechanism, 21. I gear shift mechanism, 211. I gear switch sleeve, 212. I gear shift fork, 213. I gear shift lever, 22. II-III gear shift mechanism, 221. II-III gear switch sleeve, 222. II-III gear shift fork, 223. II-III gear shift lever; 3. Input shaft, 31. I gear driving gear, 32. II gear driving gear, 33. III gear driving gear; 4. Steering clutch shaft, 41. Transmission gear; 5. Driving mechanism, 51. I gear electric cylinder, 511. I gear electric cylinder body, 512. I gear driving rod, 513. I gear detection switch, 514. First neutral gear detection switch, 515. I gear electric cylinder built-in detection element, 52. II-III gear electric cylinder, 521. II-III gear electric cylinder body, 522. II-III driving rod, 523. II gear detection switch, 524. III gear detection switch, 525. Second neutral gear detection switch, 526. II-III gear electric cylinder built-in detection element, 53. I gear connecting rod, 54. II-III gear connecting rod, 55. Electric cylinder mounting plate, 551. Mounting side plate; 10. Housing. DETAILED DESCRIPTION

[0025] The specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings. However, the description of the embodiments does not limit the technical solution. Any changes in form rather than substance based on the concept of the present invention should be regarded as within the scope of protection of the present invention.

[0026] In the following description, all concepts related to directionality or orientation such as up, down, left, right, front and back are based on the positions shown in the corresponding drawings, and therefore cannot be understood as a special limitation on the technical solution provided by the present invention.

[0027] See also Figure 1 、 Figure 2The utility model relates to a kind of electric gear shifting structure of wheat machine gearbox, including gearbox, drive mechanism 5, the drive mechanism 5 drives gearbox to shift gears.The gearbox has multiple gear speed, specifically including variable speed gear shaft 1, gear shifting mechanism 2, input shaft 3, steering clutch shaft 4, the variable speed gear shaft 1 and input shaft 3 are mutually parallelly arranged, the steering clutch shaft 4 has the transmission gear 41 meshed with the output gear 11 arranged on variable speed gear shaft 1.The multiple gear driven gear on variable speed gear shaft 1 is selectively paired meshing with the multiple gear driving gear on input shaft 3 under the control of gear shifting mechanism 2, power from input shaft 3 is shifted, and changed power is transmitted to outside equipment for work by the meshing of output gear 11 on variable speed gear shaft 1 and transmission gear 41 on steering clutch shaft 4.

[0028] As Figure 4 Shown, the variable speed gear shaft 1 is installed with output gear 11, I gear driven gear 12, II gear driven gear 13, III gear driven gear 14, I gear spline hub 15, II-III gear spline hub 16, the output gear 11, I gear spline hub 15, II-III gear spline hub 16 are fixedly installed on variable speed gear shaft 1 by spline connection mode.The I gear driven gear 12, II gear driven gear 13, III gear driven gear 14 are correspondingly rotatably installed on variable speed gear shaft 1 by I gear driven gear sleeve 121, II gear driven gear sleeve 131, III gear driven gear sleeve 141.The input shaft 3 is fixed with I gear driving gear 31, II gear driving gear 32, III gear driving gear 33, the I gear driving gear 31 and I gear driven gear 12 mesh, the II gear driving gear 32 and II gear driven gear 13 mesh, the III gear driving gear 33 and III gear driven gear 14 mesh.

[0029] As Figures 4 to 6 Shown, the gear shifting mechanism 2 includes I gear shifting mechanism 21, II-III gear shifting mechanism 22, the I gear shifting mechanism 21 includes I gear switch sleeve 211, I gear shifting fork 212 and I gear variable speed lever 213;The II-III gear shifting mechanism 22 includes II-III gear switch sleeve 221, II-III gear shifting fork 222 and II-III gear variable speed lever 223.

[0030] As Figure 4As shown, the I-gear hub 15 is adjacent to the I-driven gear 12, and the I-driven gear 12 is provided with I-matching teeth 122. The I-gear hub 15 and the outer circle of the I-matching teeth 122 selectively engage the I-switch sleeve 211. When the I-switch sleeve 211 only engages the outer circle of the I-gear hub 15, it is the first neutral gear. When the I-switch sleeve 211 simultaneously engages the outer circles of the I-gear hub 15 and the I-matching teeth 122, it is the I-gear opening. The power on the input shaft 3 is transmitted through the engagement of the I-driven gear 12 and the I-driven gear 31.

[0031] As shown, Figure 4 the II-III-gear hub 16 is located between the II-driven gear 13 and the III-driven gear 14, the II-driven gear 13 is provided with II-matching teeth 132, and the III-driven gear 14 is provided with III-matching teeth 142. The II-matching teeth 132, the II-III-gear hub 16, and the III-matching teeth 142 selectively engage the II-III-switch sleeve 221. When the II-III-switch sleeve 221 only engages the outer circle of the II-III-gear hub 16, it is the second neutral gear.

[0032] As shown, Figure 5 When the II-III-switch sleeve 221 simultaneously engages the outer circles of the II-matching teeth 132 and the II-III-gear hub 16, it is the II-gear opening. The power on the input shaft 3 is transmitted through the engagement of the II-driven gear 13 and the II-driven gear 32.

[0033] As shown, Figure 6 When the II-III-switch sleeve 221 simultaneously engages the outer circles of the III-matching teeth 142 and the II-III-gear hub 16, it is the III-gear opening. The power on the input shaft 3 is transmitted through the engagement of the III-driven gear 14 and the III-driven gear 33.

[0034] As shown, Figure 1 , Figure 3a , Figure 4 The one end of the I-gear shifting fork 212 is inserted into the circumferential surface of the I-switch sleeve 211, and the other end is fixed to the I-gear shift lever 213. The I-gear shift lever 213 is slidingly arranged on the box body 10 of the gearbox, and one end thereof is matched with the I-drive rod 512 of the drive mechanism 5 outside the box body 10.

[0035] As shown, Figure 1 , Figure 3a , Figure 5As shown, one end of the II-III gear shift fork 222 is inserted into the circumferential surface of the II-III gear switch sleeve 221, and the other end is fixed on the II-III gear shift lever 223. The II-III gear shift lever 223 is slidably set on the gearbox housing 10 and one end of it cooperates with the II-III drive rod 522 of the drive mechanism outside the housing 10.

[0036] Furthermore, the distance when the I gear shift lever 213 moves from the first neutral gear to the I gear is set to be equal to the distance when the II-III gear shift lever 223 moves from the second neutral gear to the II gear or the III gear, and the action time is the same, ensuring that the response time of each gear shift is consistent.

[0037] like Figure 2 and Figure 3a As shown, the driving mechanism 5 includes a first-gear electric cylinder 51, a second-gear electric cylinder 52, a first-gear connecting rod 53, a second-gear connecting rod 54, and a cylinder mounting plate 55. The first-gear electric cylinder 51 includes a first-gear electric cylinder body 511 and a first-gear driving rod 512 extending from the first-gear electric cylinder body 511. The second-gear electric cylinder 52 includes a second-gear electric cylinder body 521 and a second-gear driving rod 522 extending from the second-gear electric cylinder body 521.

[0038] The I-speed electric cylinder 51 and the II-III-speed electric cylinder 52 are both mounted on an electric cylinder mounting plate 55, which is fixedly mounted on the housing 10. The electric cylinder mounting plate 55 has a mounting side plate 551, which is mounted in conjunction with the housing 10. The I-speed shift lever 213 and the II-III-speed shift lever 223 pass through the housing 10 and the mounting side plate 551. The ends of the I-speed connecting rod 53 are fixedly connected to the I-speed drive rod 511 and the I-speed shift lever 213, respectively; the ends of the II-III-speed connecting rod 54 are fixedly connected to the II-III-speed drive rod 521 and the II-III-speed shift lever 223, respectively.

[0039] like Figure 1 and Figure 3a As shown, the outer side of the I-gear electric cylinder 51 is equipped with a I-gear detection switch 513 and a first neutral gear detection switch 514. The current gear position is determined by detecting the position of the I-gear drive rod 512. The outer side of the II-III-gear electric cylinder 52 is equipped with a II-gear detection switch 523, a III-gear detection switch 524, and a second neutral gear detection switch 525. The current gear position is determined by detecting the position of the II-III-gear drive rod 522. The I-gear electric cylinder 51 receives control commands from buttons for engaging I-gear and the first neutral gear, while the II-III-gear electric cylinder 52 receives control commands from buttons for engaging II-gear, III-gear, and the second neutral gear.

[0040] like Figure 3bAs shown, the interior of the I-gear electric cylinder 51 can also be installed with a built-in detection element 515 of the I-gear electric cylinder for providing real-time and accurate feedback on the position of the I-gear driving rod 512, and the interior of the II-III-gear electric cylinder 52 can also be installed with a built-in detection element 526 of the II-III-gear electric cylinder for providing real-time and accurate feedback on the position of the II-III driving rod 522, and a magnetic switch is provided on the outside of the driving mechanism 5 to assist in monitoring the real-time gear position of the transmission.

[0041] In this embodiment, the driving mechanism 5 is installed on the left and right sides of the box body 10. Of course, the driving mechanism 5 can also be installed on the top or front and back of the box body 10, as long as the driving mechanism 5 drives the I gear shift lever 213 and the II-III gear shift lever 223 to operate.

[0042] Please continue reading Figures 1 to 6 The shifting principle of the electric cylinder controlled gearbox described in this utility model is:

[0043] like Figure 3a 、 Figure 4 As shown, the initial position of the I gear electric cylinder 51 is that the gearbox is in neutral. When it is necessary to engage the I gear, press the button corresponding to the I gear, the I gear electric cylinder body 511 starts, and drives the I gear drive rod 512. The I gear drive rod 512 drives the I gear shift lever 213, the I gear shift fork 212, and the I gear switch sleeve 211 to slide to the left. When the I gear switch sleeve 211 is engaged with the I gear spline hub 15 and the outer ring of the I gear matching tooth 122 at the same time, the I gear is opened, and the power on the input shaft 3 is transmitted to the speed gear shaft 1 through the synchronous movement of the I gear driven gear 12 and the I gear spline hub 15.

[0044] like Figure 3a 、 Figure 4 As shown, the initial position of the II-III gear electric cylinder 52 is that the gearbox is in neutral. When the II gear is to be engaged, the I gear electric cylinder body 511 drives the I gear drive rod 512 to return to the initial position, that is, the first neutral gear position. Figure 5 As described, by pressing the button corresponding to gear II, the gear II-III electric cylinder body 521 is started, driving the gear II-III driving rod 521 to slide to the right from the initial position, and when the gear II-III switch sleeve 221 is simultaneously engaged with the gear II matching teeth 132 and the outer ring of the gear II-III spline hub 16, gear II is opened, and the power on the input shaft 3 is transmitted to the speed gear shaft 1 through the synchronous movement of the gear II driven gear 13 and the gear II-III spline hub 16.

[0045] like Figure 3a 、 Figure 6As shown, when the III gear needs to be engaged, the II-III gear cylinder body 521 drives the II-III gear drive rod 521 to return to the initial position, i.e. the second neutral position. Press the button corresponding to the III gear, the II-III gear cylinder body 521 is started, and the II-III gear drive rod 521 slides to the left from the initial position. When the II-III gear switch sleeve 221 is engaged on the III gear matching tooth 142 and the outer ring of the II-III gear spline hub 16, the III gear is opened, and the power on the input shaft 3 is transmitted to the transmission gear shaft 1 through the synchronous movement of the III gear driven gear 14 and the II-III gear spline hub 16.

[0046] In summary, throughout the entire operation process, as long as the button corresponding to the gear position is pressed, the gear shifting can be performed by the electric cylinder. The installation of the electric cylinder makes the gear shifting structure of the wheat machine transmission simple and easy to operate, overcomes the defects of laborious, low efficiency and gear jamming in the prior art manual gear shifting, and also overcomes the defects of complex structure, oil leakage and environmental pollution in the prior art hydraulic gear shifting.

Claims

1. An electric shifting structure for a wheat harvester gearbox, comprising a gearbox and a drive mechanism (5), wherein the drive mechanism (5) drives the gearbox to shift gears, wherein the gearbox has a multi-speed speed, specifically comprising a speed change gear shaft (1), a shift mechanism (2), and an input shaft (3), wherein the multi-speed driven gear on the speed change gear shaft (1) selectively mates and meshes with the multi-speed driving gear on the input shaft (3) under the control of the shift mechanism (2), shifts the power from the input shaft (3) and transmits the changed power to supply external equipment, characterized in that: The driving mechanism (5) includes electric cylinders corresponding to each gear position, and the electric cylinders are used to drive the gear shifting mechanism (2) to operate, thereby causing the driving gear and the driven gear of the corresponding gear position to mesh and transmit.

2. The electric shift structure of a wheat harvester gearbox according to claim 1, characterized in that: The speed gear shaft (1) is provided with an output gear (11), a first gear driven gear (12), a second gear driven gear (13), a third gear driven gear (14), a first gear spline hub (15), and a second-third gear spline hub (16). The output gear (11), the first gear spline hub (15), and the second-third gear spline hub (16) are fixedly mounted on the speed gear shaft (1). The first gear driven gear (12), the second gear driven gear (13), and the third gear driven gear (14) are rotatably mounted on the speed gear shaft (1). The input shaft (3) is provided with a driving gear respectively meshing with the first gear driven gear (12), the second gear driven gear (13), and the third gear driven gear (14). The shift mechanism (2) includes a first gear shift mechanism (21) and a second-third gear shift mechanism (22); the driving mechanism (5) includes a first gear electric cylinder (51) and a second-third gear electric cylinder (52); the first gear electric cylinder (51) drives the first gear shift mechanism (21) to operate, so that the first gear driven gear (12) and the first gear spline hub (15) rotate synchronously, and the power of the first gear is transmitted; the second-third gear electric cylinder (52) drives the second-third gear shift mechanism (22) to operate, so that the second gear driven gear (13) and the second-third gear spline hub (16) rotate synchronously, or the third gear driven gear (14) and the second-third gear spline hub (16) rotate synchronously, and the power of the second gear or the third gear is transmitted.

3. The electric shift structure of a wheat harvester gearbox according to claim 2, characterized in that: The I-gear shift mechanism (21) includes an I-gear shift lever (213), and the I-gear shift lever (213) drives the I-gear driven gear (12) and the I-gear spline hub (15) to rotate synchronously; the I-gear electric cylinder (51) includes an I-gear electric cylinder body (511) and an I-gear drive rod (512) extending from the I-gear electric cylinder body (511), and the I-gear drive rod (512) moves synchronously with the I-gear shift lever (213); the II-III-gear shift mechanism (22) includes an II-III-gear shift lever (223), the II-III gear shift lever (223) drives the II gear driven gear (13) and the II-III gear spline hub (16) to rotate synchronously or makes the III gear driven gear (14) and the II-III gear spline hub (16) rotate synchronously; the II-III gear electric cylinder (52) includes a II-III gear electric cylinder body (521) and a II-III gear drive rod (522) extending from the II-III gear electric cylinder body (521), and the II-III gear drive rod (522) moves synchronously with the II-III gear shift lever (223).

4. The electric shift structure of a wheat harvester gearbox according to claim 3, characterized in that: The driving mechanism (5) further comprises a first gear connecting rod (53) and a second-third gear connecting rod (54), wherein the two ends of the first gear connecting rod (53) are respectively fixedly connected to the first gear driving rod (511) and the first gear shifting rod (213); and the two ends of the second-third gear connecting rod (54) are respectively fixedly connected to the second-third gear driving rod (521) and the second-third gear shifting rod (223).

5. The electric shift structure of a wheat harvester gearbox according to claim 4, characterized in that: The driving mechanism (5) further comprises an electric cylinder mounting plate (55), the I-speed electric cylinder (51) and the II-III-speed electric cylinder (52) are both mounted on the electric cylinder mounting plate (55), and the electric cylinder mounting plate (55) is fixedly mounted on the box body (10) of the gearbox.

6. The electric shift structure of a wheat harvester gearbox according to claim 5, characterized in that: The outer side of the I-gear electric cylinder (51) is equipped with an I-gear detection switch (513) and a first neutral gear detection switch (514) for determining the current gear position by detecting the position of the I-gear driving rod (512); the outer side of the II-III-gear electric cylinder (52) is equipped with a II-gear detection switch (523), a III-gear detection switch (524) and a second neutral gear detection switch (525) for determining the current gear position by detecting the position of the II-III-gear driving rod (522).

7. The electric shift structure of a wheat harvester gearbox according to claim 5, characterized in that: The I-gear electric cylinder (51) is internally installed with a I-gear electric cylinder built-in detection element (515) for providing real-time feedback on the position of the I-gear driving rod (512), and the II-III-gear electric cylinder (52) is internally installed with a II-III-gear electric cylinder built-in detection element (526) for providing real-time feedback on the position of the II-III driving rod (522), and a magnetic switch is provided on the outside of the driving mechanism (5) to assist in monitoring the real-time gear position of the gearbox.

8. The electric shift structure of a wheat harvester gearbox according to claim 2, characterized in that: The I-gear shift mechanism (21) further includes an I-gear switch sleeve (211), the I-gear spline hub (15) and the I-gear driven gear (12) are adjacent, the I-gear driven gear (12) is provided with an I-gear matching tooth (122), the I-gear switch sleeve (211) selectively engages with the I-gear spline hub (15) and the outer ring of the I-gear matching tooth (122), and when the I-gear switch sleeve (211) only engages with the outer ring of the I-gear spline hub (15), the gear is in neutral; when the I-gear switch sleeve (211) simultaneously engages with the I-gear spline hub (15) and the outer ring of the I-gear matching tooth (122), the gear is on.

9. The electric shift structure of a wheat harvester gearbox according to claim 2, characterized in that: The II-III gear shift mechanism (22) further includes a II-III gear switch sleeve (221), the II-III gear spline hub (16) is located between the II gear driven gear (13) and the III gear driven gear (14), the II gear driven gear (13) is provided with a II gear matching tooth (132), the III gear driven gear (14) is provided with a III gear matching tooth (142), the II-III gear switch sleeve (221) selectively engages with the II gear matching tooth (132), the II-III gear spline hub ( When the II-III gear switch sleeve (221) is only engaged with the outer ring of the II-III gear spline hub (16), it is in neutral gear; when the II-III gear switch sleeve (221) is simultaneously engaged with the II gear matching teeth (132) and the outer ring of the II-III gear spline hub (16), the II gear is open; when the II-III gear switch sleeve (221) is simultaneously engaged with the III gear matching teeth (142) and the outer ring of the II-III gear spline hub (16), the III gear is open.

10. The electric shift structure of a wheat harvester gearbox according to claim 8 or 9, characterized in that: The I-gear shift mechanism (21) further comprises an I-gear shift fork (212), one end of which is inserted into the circumferential surface of the I-gear switch sleeve (211), and the other end is fixed on the I-gear shift lever (213), and the I-gear shift lever (213) is slidably arranged on the case (10) of the transmission; the II-III-gear shift mechanism (22) further comprises a II-III-gear shift fork (222), one end of which is inserted into the circumferential surface of the II-III-gear switch sleeve (221), and the other end is fixed on the II-III-gear shift lever (223), and the II-III-gear shift lever (223) is slidably arranged on the case (10) of the transmission.

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