Novel transmission gearbox

Abstract

The utility model relates to the technical field of agricultural tractors, in particular to a novel transmission gearbox which comprises a gearbox shell, a walking power output mechanism and a rear power output mechanism, the walking power output mechanism and the rear power output mechanism are arranged on the inner side of the gearbox shell, and the rear power output mechanism comprises a first shaft, a reverse gear shaft, a second shaft, a rear power transmission piece and a rear output connecting box. The rear power transmission part is in transmission connection between the second shaft and the rear output connecting box, and the rear output connecting box is used for installing an agricultural implement. According to the novel transmission gearbox, the walking power output mechanism and the rear power output mechanism are arranged on the inner side of the gearbox shell, the overall structure is simple and compact, and transmission and disconnection of walking power of the transmission gearbox and field operation power of an agricultural implement are controlled separately; tractor walking and agricultural implement field operation are mutually independent and do not interfere with each other, the flexible operation requirement is met, and the working efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of agricultural tractor technology, specifically a novel transmission gearbox. Background Technology

[0002] Most large and medium-horsepower agricultural tractors currently on the market use mechanical transmission. Engine power is transmitted to the transmission system via a clutch, enabling the tractor to carry various agricultural implements and complete different types of operations. The transmission gearboxes of common agricultural tractors have complex structures, employing simultaneous output of power for both travel and field operations. Power output for field operations is controlled by switching travel gears. Tractors using such transmission gearboxes have poor applicability and flexibility; the implements are always in operation when the tractor is moving, and field operations cannot be performed when the tractor is stationary, resulting in low work efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a new type of transmission gearbox with a simple structure and high working efficiency to overcome the problems existing in the existing equipment.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A novel transmission gearbox includes a gearbox housing, a walking power output mechanism disposed inside the gearbox housing, and a rear power output mechanism. The rear power output mechanism includes a first shaft, a reverse gear shaft, a second shaft, a rear power transmission component, and a rear output connection box. The rear power transmission component is drivingly connected between the second shaft and the rear output connection box. The rear output connection box is used to install agricultural implements.

[0006] The first shaft is equipped with a reverse drive gear and a second- and third-gear double gear. The second shaft is equipped with a first-gear driven gear, a second-gear driven gear, and a third-gear driven gear. The reverse shaft is equipped with a reverse gear, which meshes with the first-gear driven gear. The first reverse drive gear is configured to mesh with either the first-gear driven gear or the reverse gear. The second- and third-gear double gear is configured to mesh with either the second-gear driven gear or the third-gear driven gear.

[0007] The travel power output mechanism includes a four-drive force input shaft, a four-drive force transmission gear mounted on the four-drive force input shaft, a secondary transmission shaft, a secondary transmission double gear mounted on the secondary transmission shaft, a differential assembly, a travel drive shaft, and a drive gear mounted on the travel drive shaft. The secondary transmission double gear can move axially along the secondary transmission shaft and is configured to mesh with the four-drive force transmission gear and the differential assembly.

[0008] Based on the above technical solution, the present invention can be further improved as follows:

[0009] As a further improvement to the above technical solution, the rear power transmission component includes a rear output drive sprocket, a sprocket shaft, a rear output intermediate sprocket, and a chain wound around the rear output drive sprocket and the rear output intermediate sprocket, all mounted on the second shaft. Connecting rods are connected to both sides of the rear output connecting box, and a fixing sleeve is connected to one end of each connecting rod. The fixing sleeve is fitted onto the sprocket shaft.

[0010] As a further improvement to the above technical solution, the rear power transmission component includes a rear output drive gear, a rear output shaft, a fifth gear, a second gear, a third gear, and a fourth gear, which are disposed between the rear output drive gear and the fifth gear, and connecting rods are connected to both sides of the rear output connecting box. A fixing sleeve is connected to one end of each connecting rod and the fixing sleeve is fitted onto the rear output shaft.

[0011] As a further improvement to the above technical solution, the first reverse gear drive gear is connected to a reverse gear shift fork, the second and third gear double gear is connected to the second and third gear shift fork, and the main gear shift lever is connected to the second and third gear shift fork and the first reverse gear shift fork.

[0012] As a further improvement to the above technical solution, the first shaft is a splined shaft, and a reverse drive gear and a second and third gear double gear are sleeved on the first shaft and can slide along the axial direction of the first shaft.

[0013] As a further improvement to the above technical solution, the first shaft is connected to the clutch.

[0014] As a further improvement to the above technical solution, the auxiliary double gear is connected to the auxiliary shift fork, the auxiliary shift fork is connected to the auxiliary shift lever, a drive gear is provided on the travel drive shaft, and the differential assembly is connected between the auxiliary double gear and the drive gear. The auxiliary double gear is driven to move axially along the auxiliary shift shaft through the auxiliary shift fork, switching between high-speed travel gear, low-speed travel gear and neutral gear.

[0015] The beneficial effects of this utility model are: the novel transmission gearbox provided by this utility model sets the walking power output mechanism and the rear power output mechanism inside the gearbox housing, and the overall structure is simple and compact. Moreover, the transmission and disconnection of the walking power of the transmission gearbox and the field operation power of the agricultural implement are controlled separately, so that the tractor walking and the field operation of the agricultural implement are independent of each other and do not interfere with each other, which meets the needs of flexible operation and has high work efficiency. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of the novel transmission gearbox provided in Embodiment 1 of this utility model;

[0018] Figure 2 yes Figure 1 A top view of the transmission gearbox in the middle;

[0019] Figure 3 yes Figure 1 A side view of the transmission gearbox in the middle;

[0020] Figure 4 This is a schematic diagram of the structure of the novel transmission gearbox provided in Embodiment 2 of this utility model;

[0021] Figure 5 yes Figure 4 A top view of the transmission gearbox in the middle;

[0022] In the diagram: 10. Gearbox housing; 21. Four-wheel drive input shaft; 211. Four-wheel drive transmission gear; 22. Secondary transmission shaft; 221. Secondary transmission double gear; 222. Secondary transmission shift fork; 223. Secondary shift lever; 23. Differential assembly; 24. Travel drive shaft; 241. Drive gear; 31. First shaft; 311. First reverse drive gear; 312. Second and third gear double gear; 313. First reverse shift fork; 314. Second and third gear shift fork; 315. Main shift lever; 32. Second shaft; 321. First driven gear; 322. Second gear driven gear; 323. Third gear driven gear; 324. Rear output drive sprocket; 325. Rear output drive gear; 33. Reverse gear shaft; 331. Reverse gear; 34. Sprocket shaft; 341. Rear output intermediate sprocket; 342. Chain one; 343. Drive sprocket; 344. Drive chain; 35. Rear output connecting box; 351. Connecting rod; 352. Fixed sleeve; 36. Rear output shaft; 361. Gear five; 362. Gear two; 363. Gear three; 364. Gear four; 40. Clutch. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0024] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1:

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides a novel transmission gearbox in embodiment 1, including a gearbox housing 10, a walking power output mechanism and a rear power output mechanism disposed inside the gearbox housing 10. The rear power output mechanism includes a first shaft 31, a reverse gear shaft 33, a second shaft 32, a rear power transmission component and a rear output connection box 35. The rear power transmission component is driven between the second shaft 32 and the rear output connection box 35.

[0027] A reverse drive gear 311 and a second- and third-gear double gear 312 are mounted on the first shaft 31. The engine is connected to the first shaft 31 via a clutch 40. The engine can be a diesel engine. Specifically, the first shaft 31 is a splined shaft. The reverse drive gear 311 and the second- and third-gear double gear 312 are sleeved on the first shaft 31 and can slide along the axial direction of the first shaft 31. The reverse drive gear 311 is connected to a reverse shift fork 313, and the second- and third-gear double gear 312 is connected to a second- and third-gear shift fork 314. The main gear shift lever 315 is connected to the second- and third-gear shift fork 314 and the reverse shift fork 313. Gears are switched by operating the main gear shift lever 315. A first-gear driven gear 321, a second-gear driven gear 322, and a third-gear driven gear 323 are mounted on the second shaft 32. A reverse gear 331 is mounted on the reverse shaft 33, and the reverse gear 331 meshes with the first-gear driven gear 321. A reverse gear shift fork 313 can drive a reverse gear drive gear 311 to move along the axial direction of the first shaft 31, so that the reverse gear drive gear 311 meshes with the first gear driven gear 321 or the reverse gear 331; a second and third gear shift fork 314 can drive a second and third gear double gear 312 to move along the axial direction of the first shaft 31, so that the second and third gear double gear 312 meshes with the second gear driven gear 322 or the third gear driven gear 323.

[0028] The rear power transmission component includes a rear output drive sprocket 324 mounted on the second shaft 32, a sprocket shaft 34, a rear output intermediate sprocket 341 mounted on the sprocket shaft 34, and a chain 342 wound around the rear output drive sprocket 324 and the rear output intermediate sprocket 341, thereby transmitting power from the second shaft 32 to the sprocket shaft 34 via the chain 342. A rear output connection box 35 is used to mount agricultural implements. Connecting rods 351 are connected to both sides of the rear output connection box 35, and one end of each connecting rod 351 is connected to a fixing sleeve 352, which is fitted onto the sprocket shaft 34.

[0029] The walking power output mechanism includes a four-drive force input shaft 21, a four-drive force transmission gear 211 mounted on the four-drive force input shaft 21, a secondary transmission shaft 22, a secondary transmission double gear 221 mounted on the secondary transmission shaft 22, a differential assembly 23, a walking drive shaft 24, and a drive gear 241 mounted on the walking drive shaft 24. The auxiliary double gear 221 can move axially along the auxiliary transmission shaft 22. The auxiliary double gear 221 is configured to mesh with the four-wheel drive transmission gear 211 and the differential assembly 23. The auxiliary double gear 221 is connected to the auxiliary transmission shift fork 222, which is connected to the auxiliary shift lever 223. The driving gear is switched by operating the auxiliary shift lever 223. The driving drive shaft 24 is equipped with a drive gear 241. The differential assembly 23 is connected between the auxiliary double gear 221 and the drive gear 241. The auxiliary double gear 221 is driven to move axially along the auxiliary transmission shaft 22 by the auxiliary transmission shift fork 222, switching between high driving gear, low driving gear and neutral gear.

[0030] When using this utility model, the gears are switched by operating the main gear shift lever 315, which can be used to switch the agricultural machinery to first gear, reverse gear, second gear, third gear or neutral gear for field operation. When the first reverse gear drive gear 311 meshes with the first gear driven gear 321, the machine is switched to first gear. The transmission route of the power output by the engine is as follows: first shaft 31 → first reverse gear drive gear 311 → first gear driven gear 321 → second shaft 32 → rear output drive sprocket 324 → chain 1 342 → rear output intermediate sprocket 341 → sprocket shaft 34 → rear output connecting box 35. When the first reverse drive gear 311 meshes with the reverse gear 331, the engine shifts to reverse gear, and the power transmission route is as follows: First shaft 31 → First reverse drive gear 311 → Reverse gear 331 → First driven gear 321 → Second shaft 32 → Rear output drive sprocket 324 → Chain 1 342 → Rear output intermediate sprocket 341 → Sprocket shaft 34 → Rear output connecting box 35. When the pinion of the second and third gear double gear 312 meshes with the second driven gear 322, the engine shifts to second gear, and the power transmission route is as follows: First shaft 31 → Second and third gear shift fork 314 → Second driven gear 322 → Second shaft 32 → Rear output drive sprocket 324 → Chain 1 342 → Rear output intermediate sprocket 341 → Sprocket shaft 34 → Rear output connecting box 35. When the large tooth of the second- and third-gear double gear 312 meshes with the third-gear driven gear 323, the engine shifts to third gear. The power transmission route is as follows: first shaft 31 → second- and third-gear shift fork 314 → third-gear driven gear 323 → second shaft 32 → rear output drive sprocket 324 → chain 1 342 → rear output intermediate sprocket 341 → sprocket shaft 34 → rear output connecting box 35. Additionally, the travel gear is switched by operating the secondary gear shift lever 223, moving between high-speed, low-speed, and neutral. This separates the transmission and disconnection of the power for travel and the power for agricultural implements in the field. Tractor travel and agricultural implement operations are independent and do not interfere with each other. In other words, tractor travel and agricultural implement operations can be performed simultaneously, or the tractor can be stationary while agricultural implement operations are being performed, or the tractor can be traveling without agricultural implement operations. Example 2:

[0031] like Figure 4 , Figure 5As shown, Embodiment 2 of this utility model provides a novel transmission gearbox, including a gearbox housing 10, a walking power output mechanism and a rear power output mechanism disposed inside the gearbox housing 10. The rear power output mechanism includes a first shaft 31, a reverse gear shaft 33, a second shaft 32, a rear power transmission component, and a rear output connection box 35. The rear power transmission component is drively connected between the second shaft 32 and the rear output connection box 35. The difference between Embodiment 2 and Embodiment 1 lies only in the structure of the rear power transmission component. In Embodiment 2, the rear power transmission component includes a rear output drive gear 325 disposed on the second shaft 32, a rear output shaft 36, a fifth gear 361 disposed on the rear output shaft 36, and a second gear 362, a third gear 363, and a fourth gear 364 disposed between the rear output drive gear 325 and the fifth gear 361. The rear output connection box 35 is used to install agricultural implements. Connecting rods 351 are connected to both sides of the rear output connection box 35. One end of each connecting rod 351 is connected to a fixing sleeve 352, which is fitted onto the rear output shaft 36. The rear output drive gear 325, gear two 362, gear three 363, gear four 364, and gear five 361 mesh with each other in sequence. The power output from the second shaft 32 is transmitted to the rear output shaft 36 in sequence through the rear output drive gear 325, gear two 362, gear three 363, gear four 364, and gear five 361. Thus, the tractor's rear power output is achieved through multiple gear transmissions.

[0032] Furthermore, the two ends of the first shaft 31, reverse gear shaft 33, second shaft 32, sprocket shaft 34, four-drive force input shaft 21, auxiliary transmission shaft 22 and travel drive shaft 24 are rotatably connected to the gearbox housing 10 through bearings.

[0033] Furthermore, a transmission sprocket 343 is provided on the sprocket shaft 34, and a transmission chain 344 is sleeved on the transmission sprocket 343 to further improve the transmission effect.

[0034] The novel transmission gearbox provided by this utility model sets the walking power output mechanism and the rear power output mechanism inside the gearbox housing 10. The overall structure is simple and compact. Moreover, the transmission and disconnection of the walking power and the field operation power of the agricultural implement are controlled separately. The tractor walking and the field operation of the agricultural implement are independent of each other and do not interfere with each other, which meets the needs of flexible operation and has high work efficiency.

[0035] Any descriptions not covered in the above specific embodiments of this utility model belong to the well-known technology in the field, and can be implemented by referring to the well-known technology.

[0036] Based on the preferred embodiments of this utility model described above, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A novel transmission gearbox, characterized in that: It includes a gearbox housing, a walking power output mechanism located inside the gearbox housing, and a rear power output mechanism. The rear power output mechanism includes a first shaft, a reverse gear shaft, a second shaft, a rear power transmission component, and a rear output connection box. The rear power transmission component is connected between the second shaft and the rear output connection box. The rear output connection box is used to install agricultural implements. The first shaft is equipped with a reverse drive gear and a second- and third-gear double gear. The second shaft is equipped with a first-gear driven gear, a second-gear driven gear, and a third-gear driven gear. The reverse shaft is equipped with a reverse gear, which meshes with the first-gear driven gear. The first reverse drive gear is configured to mesh with either the first-gear driven gear or the reverse gear. The second- and third-gear double gear is configured to mesh with either the second-gear driven gear or the third-gear driven gear. The travel power output mechanism includes a four-drive force input shaft, a four-drive force transmission gear mounted on the four-drive force input shaft, a secondary transmission shaft, a secondary transmission double gear mounted on the secondary transmission shaft, a differential assembly, a travel drive shaft, and a drive gear mounted on the travel drive shaft. The secondary transmission double gear can move axially along the secondary transmission shaft and is configured to mesh with the four-drive force transmission gear and the differential assembly.

2. The novel transmission gearbox according to claim 1, characterized in that: The rear power transmission component includes a rear output drive sprocket mounted on the second shaft, a sprocket shaft, a rear output intermediate sprocket mounted on the sprocket shaft, and a chain wound around the rear output drive sprocket and the rear output intermediate sprocket. Connecting rods are connected to both sides of the rear output connecting box, and a fixing sleeve is connected to one end of each connecting rod. The fixing sleeve is fitted onto the sprocket shaft.

3. The novel transmission gearbox according to claim 1, characterized in that: The rear power transmission component includes a rear output drive gear mounted on the second shaft, a rear output shaft, a fifth gear mounted on the rear output shaft, and a second, a third, and a fourth gear mounted between the rear output drive gear and the fifth gear. Connecting rods are connected to both sides of the rear output connecting box, and a fixing sleeve is connected to one end of each connecting rod. The fixing sleeve is fitted onto the rear output shaft.

4. The novel transmission gearbox according to any one of claims 1 to 3, characterized in that: The reverse gear drive gear is connected to a reverse gear shift fork, the second and third gear double gear is connected to the second and third gear shift fork, and the main gear lever is connected to the second and third gear shift fork and the reverse gear shift fork.

5. The novel transmission gearbox according to any one of claims 1 to 3, characterized in that: The first shaft is a splined shaft, and a reverse drive gear and a second and third gear are mounted on the first shaft and can slide along the axial direction of the first shaft.

6. The novel transmission gearbox according to any one of claims 1 to 3, characterized in that: The first shaft is connected to the clutch.

7. The novel transmission gearbox according to any one of claims 1 to 3, characterized in that: The auxiliary double gear is connected to the auxiliary shift fork, which is connected to the auxiliary shift lever. A drive gear is provided on the travel drive shaft. The differential assembly is connected between the auxiliary double gear and the drive gear. The auxiliary double gear is driven to move axially along the auxiliary shift shaft through the auxiliary shift fork, switching between high-speed travel gear, low-speed travel gear, and neutral gear.

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