Gearbox and agricultural machine

Abstract

The invention provides a gearbox and agricultural machinery, the gearbox comprises a first box body and a second box body, one end of the first box body is fixedly connected with one end of the second box body, a first shaft, a second shaft and a bevel gear shaft are arranged in the first box body, and the first shaft, the second shaft and the bevel gear shaft are arranged in parallel; a fourth-gear fixing tooth, a third-gear fixing tooth, a second-gear fixing tooth and a first-gear fixing tooth are sequentially arranged on the first shaft; a fourth-gear duplex gear, a third-gear duplex gear, a second-gear duplex gear, an action gear and a first-gear duplex gear are sequentially arranged on the second shaft, and a movable joint sleeve and the like are further arranged on the periphery of the action gear. Compared with a gearbox with an existing structure, the gearbox with the structure has the advantages that on the basis that the existing gearbox has an independent front drive function and an independent four-wheel drive function, the independent rear drive function is added. Therefore, compared with a gearbox of an existing structure, the gearbox has the advantages of being compact in structure, more stable and reliable in performance, lower in use cost and more complete in function.

Description

Technical Field

[0001] The present invention relates to the field of agricultural machinery, and in particular to a gearbox and agricultural machinery. Background Art

[0002] In recent years, with the continuous development of the agricultural economy, agricultural machinery of various structures, such as tractors, have been increasingly widely used in agricultural production activities.

[0003] Tractors, including transmission components like gearboxes, are currently widely used. These gearboxes are primarily suitable for small-scale farmland operations and transportation in mountainous areas, gullies, and other areas with relatively poor road conditions. Their functions are relatively simple. However, as user demands continue to rise, their performance and reliability are no longer meeting these requirements. To increase output power, a sub-transmission or front- and rear-drive transfer cases must be added. Simply stacking these existing systems would not only result in a bulky design, but also in high modification costs and in instable stability.

[0004] In summary, how to provide a gearbox with a compact structure, more stable and reliable performance, lower operating cost, and more complete functions, as well as agricultural machinery including such a gearbox, has become a technical problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a gearbox with a compact structure, more stable and reliable performance, lower use cost and more complete functions, and an agricultural machine including the gearbox.

[0006] The solution of the present invention is achieved as follows: the present invention proposes a gearbox for agricultural machinery, comprising a first housing and a second housing, one end of the first housing is fixedly connected to one end of the second housing, a first shaft, a second shaft and a bevel gear shaft are arranged in the first housing, and the first shaft, the second shaft and the bevel gear shaft are arranged in parallel; the first shaft is sequentially provided with a fourth gear fixed tooth, a third gear fixed tooth, a second gear fixed tooth and a first gear fixed tooth; the second shaft is sequentially provided with a fourth gear double gear, a third gear double gear, a second gear double gear, an active tooth, and a first gear double gear, and a movable coupling sleeve is further provided on the periphery of the active tooth; one end of the bevel gear shaft is provided with a bevel gear; the second housing is provided with a PTO output shaft, a bridge shaft and a rear drive toothed belt shaft, the P The TO output shaft, the bridge shaft, and the rear-drive toothed belt shaft are arranged in parallel, with one end of the bevel gear shaft placed in the second housing. The PTO output shaft is arranged at one end of the first shaft and is provided with a low-speed duplex gear. The bridge shaft is arranged at one end of the two shafts and is provided with front and rear drive passive gears, front drive driving gears, front and rear drive coupling sleeves, and rear drive driving gears. The ends of the two shafts near the bridge shaft are also provided with high-speed fixed gears, high- and low-speed gear holders, and low-speed fixed gears. The rear-drive toothed belt shaft is arranged at one end of the bevel gear shaft and is also provided with a front drive toothed belt shaft at the end of the rear-drive toothed belt shaft near the bevel gear shaft. The end of the bevel gear shaft near the rear-drive toothed belt shaft is also provided with a terminal gear and front and rear drive driving gears. Compared with the existing transmission structure, this transmission structure adds a second housing to the right end of the first housing and a bridge shaft in the second housing, allowing power from one shaft to be transmitted independently to the rear-drive toothed belt shaft. In other words, the existing transmission structure has the function of independent rear-drive. Therefore, compared with the existing gearbox structure, it has the advantages of compact structure, more stable and reliable performance, lower use cost, and more complete functions.

[0007] Another technical solution of the present invention is that on the basis of the above, the periphery of the high and low speed gear seat is further provided with high and low speed sliding teeth, and the high and low speed sliding teeth can slide on the high and low speed gear seat.

[0008] Another technical solution of the present invention is that on the basis of the above, the gearbox also includes a clutch shaft, the clutch shaft is arranged at one end of the one shaft, the clutch shaft is provided with a connecting sleeve at one end close to the one shaft, and is connected to the end of the one shaft through the connecting sleeve.

[0009] Another technical solution of the present invention is that, based on the above, the end of the PTO away from the one shaft is further provided with an output flange, and the low-speed duplex teeth can be engaged with the high-speed fixed teeth and the low-speed fixed teeth respectively.

[0010] Another technical solution of the present invention is that, based on the above, active teeth are further provided on the bridge shaft, and the front and rear drive coupling sleeves can move back and forth on the active teeth.

[0011] Another technical solution of the present invention is that, based on the above, a plurality of tapered bearings are further provided on the front drive toothed belt shaft, and the plurality of tapered bearings are closely arranged.

[0012] Another technical solution of the present invention is that, based on the above, the rear drive toothed belt shaft is further provided with an output flange for outputting power, and the output flange is arranged at one end of the rear drive toothed belt shaft away from the bevel gear shaft.

[0013] Another technical solution of the present invention is that, based on the above, a first ball bearing is further provided on the rear-drive toothed belt shaft, and the rear-drive toothed belt shaft is connected to one end of the second housing via the first ball bearing.

[0014] Another technical solution of the present invention is that, based on the above, a second ball bearing is further provided on the bevel gear shaft, and the bevel gear shaft is connected through the ends of the first box body and the second box body respectively.

[0015] On the other hand, the present invention further provides an agricultural machine comprising a gearbox, wherein the gearbox is the gearbox as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0017] Figure 1 The figure is a schematic structural diagram of a gearbox of the present invention.

[0018] The corresponding relationship of the reference numerals is:

[0019] 1 clutch shaft 2 connecting sleeve 3 first shaft

[0020] 4th gear fixed gear 5th gear fixed gear 6th gear fixed gear

[0021] 7 First gear fixed gear 8 Low speed double gear 9 High speed fixed gear

[0022] 10 High and low speed gear seat 11 High and low speed sliding gear 12 Low speed fixed gear

[0023] 13 front and rear drive passive gear 14 front drive active gear 15 front and rear drive coupling sleeve

[0024] 16 output flange 17 rear drive active gear 18 front and rear drive active gear

[0025] 19 axle shaft 20 rear drive flange 21 rear drive belt shaft

[0026] 22 front drive gear shaft 23 front drive passive gear 24 front and rear drive active gear

[0027] 25 end gear 26 first gear double gear 27 gear seat

[0028] 28 working gear 29 coupling sleeve 30 second gear double gear

[0029] 31 third gear double gear 32 fourth gear double gear 33 bevel gear

[0030] 34 second shaft 35 bevel gear shaft 36 first box

[0031] 37 Second box 38 PTO output shaft 39 Active action gear

[0032] 40 tapered bearing 41 first ball bearing 42 end cover

[0033] 43 second ball bearing DETAILED DESCRIPTION

[0034] The present invention is described in detail below with reference to the accompanying drawings. The description in this section is merely exemplary and explanatory and should not have any limiting effect on the scope of protection of the present invention. In addition, those skilled in the art can combine the features in the embodiments and different embodiments of this document accordingly based on the description of this document.

[0035] The embodiments of the present invention are as follows, see Figure 1The gearbox shown is used in agricultural machinery and specifically includes a first housing 36 and a second housing 37. One end of the first housing 36 (i.e., the right end shown in the figure) is fixedly connected to one end of the second housing 37 (i.e., the left end shown in the figure). A first shaft 3, a second shaft 34, and a bevel gear shaft 35 are disposed within the first housing 36. These first, second, and bevel gear shafts 35 are arranged in parallel. On the first shaft 3, from left to right, are disposed the fourth gear fixed gear 4, the third gear fixed gear 5, the second gear fixed gear 6, and the first gear fixed gear 7. On the second shaft 34, from left to right, are disposed the fourth gear duplex gear 32, the third gear duplex gear 31, the second gear duplex gear 30, the active gear 28, and the first gear duplex gear 26. A movable engagement sleeve 29 is provided around the active gear 28. A bevel gear 33 is also provided on one end (i.e., the left end shown in the figure) of the bevel gear shaft 35. The second housing 37 is provided with a PTO output shaft, a bridge shaft 19 and a rear-drive toothed belt shaft 21. The PTO output shaft, the bridge shaft 19 and the rear-drive toothed belt shaft 21 are arranged in parallel, and one end of the bevel gear shaft 35, that is, the right end shown in the figure, is placed in the second housing 37. The PTO output shaft 38 is arranged at one end of the one shaft 3, that is, the right end shown in the figure, and the PTO output shaft 38 is provided with a low-speed duplex gear 8. The bridge shaft 19 is arranged at one end of the second shaft 34, that is, the right end shown in the figure. On the bridge shaft 19, from left to right, there are arranged front and rear drive passive gears 13, front drive active gears 14, front and rear drive coupling sleeves 15, and rear drive active gears 17. The end of the second shaft 34 close to the bridge shaft 19, that is, the right end shown in the figure, is also provided with a high-speed fixed gear 9, a high- and low-speed gear seat 10, and a low-speed fixed gear 12. The rear-drive toothed belt shaft 21 is disposed at one end of the bevel gear shaft 35, namely the right end shown in the figure. A front-drive toothed belt shaft 22 is also disposed at the end of the rear-drive toothed belt shaft 21 near the bevel gear shaft 35, namely the left end shown in the figure. The bevel gear shaft 35 is also provided with a terminal tooth 25 and front and rear drive active teeth 24 at the end near the rear-drive toothed belt shaft 21, namely the right end shown in the figure. Compared to existing transmissions, this transmission structure features a second housing 37 added to the right end of the first housing 36 and a bridge shaft 19 disposed within the second housing 37. This allows power from the first shaft 3 to be transmitted independently to the rear-drive toothed belt shaft 21. This adds independent rear-drive functionality to the existing transmissions that provide independent front-drive and four-wheel drive. Therefore, compared to existing transmissions, this transmission has the advantages of a compact structure, more stable and reliable performance, lower operating costs, and a wider range of functions.

[0036] Based on the above embodiment, in another embodiment of the present invention, Figure 1 As shown, high-speed and low-speed sliding teeth 11 are sleeved on the periphery of the high-speed and low-speed gear seat 10 , and the high-speed and low-speed sliding teeth 11 can slide left and right on the high-speed and low-speed gear seat 10 .

[0037] Based on the above embodiment, in another embodiment of the present invention, Figure 1As shown, the gearbox also includes a clutch shaft 1, which is arranged at one end of a shaft 3, that is, the left end shown in the figure. The clutch shaft 1 is close to the end of the shaft 3, that is, the right end shown in the figure. A connecting sleeve 2 is provided, and the clutch shaft 1 is connected to the left end of the shaft 3 through the connecting sleeve 2.

[0038] Based on the above embodiment, in another embodiment of the present invention, Figure 1 As shown, the end of the PTO away from the shaft 3, that is, the right end shown in the figure, is also provided with an output flange 16, and the low-speed duplex gear 8 can be engaged with the high-speed fixed gear 9 and the low-speed fixed gear 12 respectively.

[0039] Based on the above embodiment, in another embodiment of the present invention, Figure 1 As shown, the bridge shaft 19 is further provided with active teeth 39 , and the front and rear drive coupling sleeves 15 can move back and forth on the active teeth 39 .

[0040] Based on the above embodiment, in another embodiment of the present invention, Figure 1 As shown, the front drive toothed belt shaft 22 is further provided with a plurality of tapered bearings 40, which are closely arranged. More specifically, the number of tapered bearings 40 is preferably two.

[0041] Based on the above embodiment, in another embodiment of the present invention, Figure 1 As shown, the rear drive toothed belt shaft 21 is further provided with an output flange 16 for outputting power. The output flange 16 is arranged at the end of the rear drive toothed belt shaft 21 away from the bevel gear shaft 35, that is, the right end shown in the figure.

[0042] Based on the above embodiment, in another embodiment of the present invention, Figure 1 As shown, a first ball bearing 41 is further provided on the rear drive toothed belt shaft 21 , and the rear drive toothed belt shaft 21 is connected to one end of the second box 37 , ie, the right end shown in the figure, through the first ball bearing 41 .

[0043] Based on the above embodiment, in another embodiment of the present invention, Figure 1 As shown, a second ball bearing 43 is also provided on the bevel gear shaft 35, and the bevel gear shaft 35 is connected through the ends of the first housing 36 and the second housing 37, respectively. In addition, the gearbox also includes front and rear drive gears 18 and end caps 42. The specific structure and arrangement can be referred to the existing and improved methods, and will not be repeated here.

[0044] The transmission structure described above adds a second housing 37 to the right end of the first housing 36 and incorporates a bridge shaft 19 within the second housing 37. This allows power from the first shaft 3 to be independently transmitted to the rear-drive toothed belt shaft 21. This adds independent rear-drive functionality to the existing transmission's independent front-drive and four-wheel-drive capabilities. Consequently, compared to existing transmissions, this design offers the advantages of a more compact structure, more stable and reliable performance, lower operating costs, and a wider range of functions.

[0045] In addition, the present invention also proposes an agricultural machine, comprising a gearbox, wherein the gearbox is the gearbox as described above.

[0046] During the operation of the agricultural machinery with the above structure, when rear wheel drive is required, Figure 1 As shown, power is input from the clutch shaft 1 to the first shaft 3, and is transmitted from the first gear fixed tooth 7 of the first shaft 3 to the first gear duplex tooth 26 of the second shaft 34. The second shaft 34 transmits power to the terminal tooth 25 on the gear shaft through the high and low speed sliding teeth 11, and drives the bevel gear shaft 35 to rotate. The bevel gear shaft 35 transmits power to the front and rear drive driven teeth 13 through the front and rear drive driving teeth 24, and then drives the cross-bridge shaft 19 to rotate. When the cross-bridge shaft 19 rotates, the power is transmitted to the rear drive belt shaft 21 through the rear drive driving teeth 17, and finally drives the rear drive belt shaft 21 to rotate to realize rear wheel drive.

[0047] When front-wheel drive is required, power is input from the clutch shaft 1 to the first shaft 3, and is transmitted from the first-gear fixed tooth 7 of the first shaft 3 to the first-gear duplex tooth 26 of the second shaft 34. The second shaft 34 is transmitted to the PTO output shaft 38 through the low-speed duplex tooth 8, and then the power is transmitted to the low-speed fixed tooth 12 through the PTO output shaft 38, thereby driving the cross-bridge shaft 19 to rotate. At this time, the high- and low-speed sliding teeth 11 move to the right, and the power is transmitted to the end tooth 25 on the front-drive toothed belt shaft 22 through the high- and low-speed sliding teeth 11, and further transmitted to the rear-drive toothed belt shaft 21, and transmitted from the front and rear drive driving teeth 24 to the front and rear drive passive teeth 13, and then transmitted to the front drive passive teeth 23 through the front drive driving teeth 14, thereby driving the bevel gear shaft 35 to rotate. When the bevel gear shaft 35 rotates, it drives the bevel gear 33 to rotate, and finally realizes front-wheel drive.

[0048] When four-wheel drive is required, power is input from the clutch shaft 1 to the first shaft 3, and then from the first gear fixed tooth 7 on the first shaft 3 to the first gear double gear 26, thereby driving the second shaft 34 to rotate. The second shaft 34 drives the low-speed double gear 8 on the PTO output shaft 38 to rotate by adjusting the fixed tooth, and then drives the PTO output shaft 38 to rotate. After that, the power is transmitted to the low-speed fixed tooth 12. At this time, the high-low speed sliding tooth 11 moves to the right, and the power drives the end tooth 25 on the bevel gear shaft 35 to rotate through the high-low speed sliding tooth 11, and then transmits the power to the front and rear drive active gears 24, and then to the front and rear drive passive gears 13 and the front drive active gear 14. After that, the power is transmitted in two lines, front drive and rear drive. Specifically, the front drive route is transmitted from the front drive active gear 14 to the front drive passive gear 23 on the front drive belt shaft 22, thereby driving the bevel gear shaft 35 to rotate, realizing front wheel drive. The rear drive route passes through the rear drive driving gear 17 on the bridge shaft 19 and is transmitted to the rear drive belt shaft 21, thereby driving the rear drive flange 20 to rotate, and finally realizing simultaneous driving of the rear and front wheels.

[0049] The agricultural machinery with this structure has the advantages of more stable and reliable performance, lower cost of use, and more complete functions.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A gearbox for agricultural machinery, characterized in that: It includes a first box body and a second box body, one end of the first box body is fixedly connected to one end of the second box body, and a first shaft, a second shaft and a bevel gear shaft are arranged in parallel in the first box body; The first shaft is provided with a fourth gear fixed gear, a third gear fixed gear, a second gear fixed gear and a first gear fixed gear in sequence; The second shaft is provided with a fourth gear duplex gear, a third gear duplex gear, a second gear duplex gear, an action gear, and a first gear duplex gear in sequence, and a movable engagement sleeve is provided on the periphery of the action gear; One end of the bevel gear shaft is provided with a bevel gear; A PTO output shaft, a bridge shaft, and a rear drive toothed belt shaft are provided in the second housing. The PTO output shaft, the bridge shaft, and the rear drive toothed belt shaft are arranged in parallel, and one end of the bevel gear shaft is placed in the second housing. The PTO output shaft is arranged at one end of the first shaft, and the PTO output shaft is provided with a low-speed duplex gear; The bridge shaft is arranged at one end of the two shafts, and is provided with front and rear drive passive gears, front drive driving gears, front and rear drive coupling sleeves, and rear drive driving gears; The ends of the two shafts close to the bridge shaft are also provided with high-speed fixed teeth, high-speed and low-speed gear seats, and low-speed fixed teeth; The rear drive toothed belt shaft is arranged at one end of the bevel gear shaft, and a front drive toothed belt shaft is further arranged at one end of the rear drive toothed belt shaft close to the bevel gear shaft; The end of the bevel gear shaft close to the rear drive gear belt shaft is also provided with a terminal tooth and front and rear drive active teeth.

2. The gearbox according to claim 1, characterized in that High and low speed sliding teeth are also sleeved on the periphery of the high and low speed gear seat, and the high and low speed sliding teeth can slide on the high and low speed gear seat.

3. The gearbox according to claim 2, characterized in that: The gearbox further includes a clutch shaft, which is arranged at one end of the one shaft. The end of the clutch shaft close to the one shaft is provided with a connecting sleeve and is connected to the end of the one shaft through the connecting sleeve.

4. The gearbox according to claim 3, characterized in that: An output flange is further provided on one end of the PTO away from the one shaft, and the low-speed duplex gear can be engaged with the high-speed fixed gear and the low-speed fixed gear respectively.

5. The gearbox according to claim 4, characterized in that: The bridge shaft is also provided with active teeth, and the front and rear drive coupling sleeves can move back and forth on the active teeth.

6. The gearbox according to claim 5, characterized in that The front drive toothed belt shaft is further provided with a plurality of tapered bearings, and the plurality of tapered bearings are closely arranged.

7. The gearbox according to claim 6, characterized in that The rear drive toothed belt shaft is further provided with an output flange for outputting power, and the output flange is arranged at one end of the rear drive toothed belt shaft away from the bevel gear shaft.

8. The gearbox according to claim 7, characterized in that: The rear-drive toothed belt shaft is further provided with a first ball bearing, and the rear-drive toothed belt shaft is connected to one end of the second housing via the first ball bearing.

9. The gearbox according to claim 8, characterized in that A second ball bearing is also provided on the bevel gear shaft, and the bevel gear shaft is connected through the ends of the first box body and the second box body respectively.

10. An agricultural machine comprising a gearbox, characterized in that: The gearbox is the gearbox according to any one of claims 1 to 9.

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