CN215890979U

CN215890979U - Four-wheel drive gearbox and tractor

Info

Publication number: CN215890979U
Application number: CN202120852675.4U
Authority: CN
Inventors: 陈震霖; 周志; 李靖; 蒋艳铼
Original assignee: Changsha Sanglaite Agricultural Mechanical Equipment Co Ltd
Current assignee: Changsha Sanglaite Agricultural Mechanical Equipment Co Ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2022-02-22
Anticipated expiration: 2031-04-23

Abstract

The utility model provides a four-wheel drive gearbox, which is used on a tractor and comprises a box body, a first shaft and a second shaft, wherein the first shaft is arranged in the box body, and the second shaft is arranged in parallel with the first shaft; a first-gear driving tooth, a second-gear driving tooth, a third-gear driving tooth and a fourth-gear driving tooth are sequentially arranged on the shaft, and a third-gear action tooth, a fourth-gear action tooth and a third-gear and fourth-gear engaging sleeve which can slide on the third-gear and fourth-gear action teeth are further arranged between the third-gear driving tooth and the fourth-gear driving tooth; the first gear passive tooth, the second gear passive tooth, the third gear passive tooth and the fourth gear passive tooth are sequentially arranged on the second shaft; one end of the two shafts is also provided with an active bevel gear shaft, and one side of the active bevel gear shaft is also provided with a four-wheel drive control part; and one end of the box body is also provided with a PTO output part with adjustable output speed. The four-wheel drive gearbox with the structure has the advantages of better driving capability, more reasonable overall structure, more complete functions and the like. In addition, the utility model also provides a tractor.

Description

Four-wheel drive gearbox and tractor

Technical Field

The utility model relates to the field of agricultural machinery, in particular to a four-wheel drive gearbox and a tractor.

Background

The speed variator consists of speed variator, speed-varying transmission mechanism and operating mechanism, and is also called speed variator, which can change the speed and torque of engine and can change the transmission ratio between output shaft and input shaft.

In the field of passenger vehicles, the gear box is fast to update, the technology is more and more advanced, but in the field of agricultural machinery, the gear box is widely applied to agricultural machinery at present due to factors in various aspects such as cost and the like, the front driving is mainly used, but according to the load condition of the whole tractor, the weight of a vehicle is pressed on a container part, namely the rear end of the whole tractor, and the front driving runs by pulling a machine head, so that the problems of insufficient driving capability of the whole tractor, poor trafficability and the like are caused. In addition, the gearbox of the existing structure also has the problem of single function.

In summary, how to provide a four-wheel drive transmission with a main rear drive function, a better driving capability, a more reasonable overall structure and more complete functions, and a tractor comprising the four-wheel drive transmission become technical problems to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: the four-wheel drive gearbox and the tractor comprising the four-wheel drive gearbox are mainly used for rear drive, have better driving capability, more reasonable integral structure and more complete functions.

The solution of the utility model is realized by the following steps: the utility model provides a four-wheel drive gearbox which is used on a tractor and comprises a box body, a first shaft and a second shaft, wherein the first shaft is arranged in the box body, and the second shaft is arranged in parallel with the first shaft; a first-gear driving tooth, a second-gear driving tooth, a third-gear driving tooth and a fourth-gear driving tooth are sequentially arranged on the shaft, and a third-gear action tooth, a fourth-gear action tooth and a third-gear and fourth-gear engaging sleeve which can slide on the third-gear and fourth-gear action teeth are further arranged between the third-gear driving tooth and the fourth-gear driving tooth; the first gear driven tooth, the second gear driven tooth, the third gear driven tooth and the fourth gear driven tooth are respectively used for being meshed with the first gear driving tooth, the second gear driving tooth, the third gear driving tooth and the fourth gear driving tooth; a second-gear action tooth and a second-gear engaging sleeve which can slide on the second-gear action tooth are also arranged between the first-gear driving tooth and the second-gear driving tooth; one end of the two shafts is also provided with an active bevel gear shaft, and one side of the active bevel gear shaft is also provided with a four-wheel drive control part for controlling the four-wheel drive to be opened and closed; one end of the box body is also provided with a PTO output part used for providing power for the additional machine tool, and the speed output by the PTO output part is adjustable. The four-wheel drive gearbox of this structure, the in-process of traveling drives after usually and is main, and when muddy road surface, perhaps the relatively poor road surface walking of road conditions, through operation four-wheel drive control part, can realize four-wheel drive output for the driving force is stronger. In addition, because the PTO output part is arranged on the four-wheel drive gearbox, and the speed output by the PTO output part can be adjusted, the power can be conveniently provided for various additional machines. Compared with the gearbox with the existing structure, the gearbox with the structure has the advantages of better driving capability, more reasonable overall structure, more complete functions and the like.

On the basis, the four-wheel drive control part comprises four-wheel drive driving teeth arranged on the driving bevel gear shaft, an intermediate shaft is further arranged on one side of the driving bevel gear shaft, and four-wheel drive bridge teeth meshed with the four-wheel drive driving teeth are arranged on the intermediate shaft.

In another technical solution of the present invention, based on the above, the four-wheel drive control unit further includes a front drive output shaft disposed on one side of the intermediate shaft, the front drive output shaft is further provided with four-wheel drive sliding teeth capable of sliding on the front drive output shaft, and the four-wheel drive sliding teeth are capable of meshing with the four-wheel drive bridge teeth.

On the basis, one side of the four-drive sliding tooth is also provided with a shifting fork groove for arranging a shifting fork, and the four-drive sliding tooth can be meshed with or separated from the four-drive bridging tooth under the action of the shifting fork.

On the basis, one end of the driving bevel gear shaft, which is close to the two shafts, is also provided with a second low-speed driven gear and a high-speed sliding gear arranged on one side of the second low-speed driven gear, and the high-speed sliding gear can move back and forth on the driving bevel gear shaft and realize the connection or separation of the driving bevel gear shaft and the one shaft.

On the basis, the other technical scheme of the utility model is that a low-speed driving tooth is further arranged on the shaft, and the low-speed driving tooth is arranged at one end, away from the third-gear driving tooth, of the fourth-gear driving tooth.

The four-wheel drive gearbox further comprises a PTO connecting shaft and a connecting sleeve arranged at one end of the PTO connecting shaft, and the PTO connecting shaft is connected with the two shafts in a separable and separable mode through the connecting sleeve.

In addition to the above, another technical solution of the present invention is that the PTO output portion includes duplex teeth provided on the PTO coupling shaft, and a PTO output shaft provided in parallel with the PTO coupling shaft, and the PTO output shaft is further provided with PTO high-speed driven teeth and first low-speed driven teeth engaged with the PTO duplex teeth.

In addition to the above, another technical solution of the present invention is that a PTO output engaging sleeve is further provided between the PTO high-speed driven tooth and the first low-speed driven tooth, and the PTO output shaft is further provided with a PTO output acting tooth, and the PTO output engaging sleeve is sleeved on the PTO output acting tooth and can slide on the PTO output acting tooth.

In another aspect, the utility model further provides a tractor comprising a four-wheel drive gearbox, wherein the four-wheel drive gearbox is the gearbox as described above.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

Fig. 1 is a schematic structural diagram of a four-wheel drive transmission according to the present invention.

The corresponding relation of the reference signs is as follows:

1 clutch shaft 2 first gear driving tooth 3 second gear driving tooth

4 three-gear driving gear 5 and 6 three-gear and four-gear joint sleeve

7 three-gear and four-gear action tooth 8 four-gear driving tooth 9 low-speed driving tooth

10 connecting sleeve 11PTO connecting shaft 12PTO duplex gear

13 first low-speed driven gear 14PTO output shaft 15 first bearing

16PTO output action tooth 17PTO output engaging sleeve 18PTO high-speed driven tooth

19 passive umbrella total teeth 20 driving umbrella tooth shaft 21 four-wheel drive sliding teeth

22 four-wheel

drive bridging tooth

23 and 24 second bearing four-wheel drive driving tooth

25 second low-speed driven tooth 26 high-speed sliding tooth 27 high-low speed action tooth

28 high-speed driving tooth 29, fourth-gear driven tooth 30 and third-gear driven tooth

31 second gear driven gear 32 second gear bush 33 second gear engaging sleeve

34 first gear action tooth 35 first gear driven tooth 36 first gear bush

37 one shaft 38PTO output 39 four-wheel drive control part

40 two-shaft 41 intermediate shaft 42 front drive output shaft

Detailed Description

The present invention will now be described in detail with reference to the drawings, which are given by way of illustration and explanation only and should not be construed to limit the scope of the present invention in any way. Furthermore, features from embodiments in this document and from different embodiments may be combined accordingly by a person skilled in the art from the description in this document.

In the following embodiments of the present invention, please refer to the four-wheel drive transmission shown in fig. 1, which is used in a tractor, and the four-wheel drive transmission includes a casing, a first shaft 37 disposed in the casing, and a second shaft 40 disposed parallel to the first shaft 37. A first-gear driving tooth 2, a second-gear driving tooth 3, a third-gear driving tooth 4 and a fourth-gear driving tooth 8 are sequentially arranged on a shaft 37 from left to right, a third-fourth-gear action tooth 7 and a third-fourth-gear engaging sleeve 6 which can slide on the third-fourth-gear action tooth 7 are further arranged between the third-gear driving tooth 4 and the fourth-gear driving tooth 8, and the third-fourth-gear engaging sleeve 6 is sleeved on the third-fourth-gear action tooth 7. The first gear driven tooth 35, the second gear driven tooth 31, the third gear driven tooth 30 and the fourth gear driven tooth 29 are sequentially arranged on the second shaft 40 from left to right, and the first gear driven tooth 35, the second gear driven tooth 31, the third gear driven tooth 30 and the fourth gear driven tooth 29 are respectively used for being meshed with the first gear driving tooth 2, the second gear driving tooth 3, the third gear driving tooth 4 and the fourth gear driving tooth 8. A second gear action tooth 34 and a second gear engaging sleeve 33 which can slide on the second gear action tooth 34 are further arranged between the first gear driving tooth 2 and the second gear driving tooth 3, one end of a second shaft 40, namely the right end shown in the drawing, is further provided with a driving bevel gear shaft 20, one side of the driving bevel gear shaft 20 is further provided with a four-wheel drive control part 39 used for controlling four-wheel drive separation and combination, under the normal condition, the gearbox is in a rear drive state, and the front drive also participates in working by operating the four-wheel drive control part 39, so that four-wheel drive is realized. Further, one end of the casing, the right end as viewed in the drawing, is provided with a PTO output 38 for powering an additional implement, and the speed output by the PTO output 38 is adjustable. The four-wheel drive gearbox with the structure is mainly driven generally in the driving process, can realize four-wheel drive output through operating the four-wheel drive control part 39 on a muddy road or on the road with poor road conditions, and enables the driving capability to be stronger. In addition, because the PTO output part 38 is arranged on the four-wheel drive gearbox, and the speed output by the PTO output part 38 can be adjusted, the power supply for various additional machines is convenient. Compared with the gearbox with the existing structure, the gearbox with the structure has the advantages of better driving capability, more reasonable overall structure, more complete functions and the like.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, the four-wheel drive control part 39 specifically includes four-wheel drive teeth 24 disposed on the drive bevel gear shaft 20, an intermediate shaft 41 is further disposed on one side of the drive bevel gear shaft 20, i.e., on the lower side shown in the figure, the intermediate shaft 41 is disposed in parallel with the drive bevel gear shaft 20, and the intermediate shaft 41 is provided with four-wheel drive bridge teeth 22 engaged with the four-wheel drive teeth 24.

In addition to the above embodiments, in another embodiment of the present invention, as shown in fig. 1, the four-drive control unit 39 further includes a front-drive output shaft 42 disposed on one side of the intermediate shaft 41, i.e., on the lower side shown in the drawing, the front-drive output shaft 42 is disposed in parallel with the intermediate shaft 41 and the driving bevel gear shaft 20, the front-drive output shaft 42 is further provided with four-drive sliding teeth 21 capable of sliding on the front-drive output shaft 42, during the sliding process, the four-drive sliding teeth 21 can be engaged with the four-drive bridge teeth 22, more specifically, as shown in the drawing, when the front-drive sliding teeth slide to the left, the four-drive sliding teeth 21 can be engaged with the four-drive bridge teeth 22, and at this time, the power is transmitted to the front-drive output shaft 42 through the four-drive sliding teeth 21, thereby realizing the front-drive power output.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, a fork slot for arranging a fork is further provided on one side of the four-drive sliding tooth 21, i.e. the left side in the figure, and under the action of the fork, the four-drive sliding tooth 21 moves left and right on the front-drive output shaft 42, so as to realize the engagement or disengagement of the four-drive sliding tooth 21 and the four-drive bridge tooth 22.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, one end of the driving bevel gear shaft 20 close to the two shafts 40, i.e. the left end in the figure, is further provided with a second low-speed driven gear 25, and a high-speed sliding gear 26 arranged on one side of the second low-speed driven gear 25, i.e. the left side in the figure, and the high-speed sliding gear 26 can move back and forth on the driving bevel gear shaft 20, so as to realize the connection or separation of the driving bevel gear shaft 20 and the two shafts 40.

On the basis of the above embodiment, in another embodiment of the present invention, as shown in fig. 1, a low-speed driving tooth 9 is further disposed on a shaft 37, and the low-speed driving tooth 9 is specifically disposed at one end of the fourth-gear driving tooth 8 departing from the third-gear driving tooth 4, i.e., the right end shown in the figure.

In another embodiment of the present invention, based on the above embodiment, as shown in fig. 1, the four-wheel drive transmission further includes a PTO coupling shaft 11 and a coupling sleeve 10 disposed at one end, i.e., the right end in the drawing, of the PTO coupling shaft 11, and the PTO coupling shaft 11 is detachably coupled to the two shafts 40 through the coupling sleeve 10. More specifically, when the connecting sleeve 10 connects the secondary shaft 40 and the PTO connecting shaft 11 together, power is output to the PTO output portion 38 through the PTO output shaft 14. When the two are not connected, power cannot be output to the PTO output portion 38.

In addition to the above embodiments, in another embodiment of the present invention, as shown in fig. 1, the PTO output portion 38 includes a duplex gear provided on the PTO coupling shaft 11, and a PTO output shaft 14 provided in parallel with the PTO coupling shaft 11, and the PTO output shaft 14 is further provided with a PTO high-speed driven gear 18 and a first low-speed driven gear 13 engaged with the PTO duplex gear 12. During operation, power is transmitted to the PTO duplex gear 12 through the PTO connecting shaft 11 and then transmitted to the PTO high-speed driven gear 18 and the first low-speed driven gear 13 through the PTO duplex gear 12.

In addition to the above embodiments, in another embodiment of the present invention, as shown in fig. 1, a PTO output engaging sleeve 17 is further disposed between the PTO high-speed driven tooth 18 and the first low-speed driven tooth 13, a PTO output acting tooth 16 is further disposed on the PTO output shaft 14, and the PTO output engaging sleeve 17 is sleeved on the PTO output acting tooth 16 and can slide on the PTO output acting tooth 16. As shown in the figure, when it moves to the left, the PTO output coupling sleeve 17 engages the PTO high speed driven teeth 18, at which point power is transferred through the twin teeth to the PTO high speed driven teeth 18, through the PTO high speed driven teeth 18 and to the PTO output shaft 14. When it moves to the right, the PTO output coupling sleeve 17 engages the first low-speed driven tooth 13, and at this time, power is transmitted to the first low-speed driven tooth 13 via the double tooth, and then to the PTO output shaft 14 via the first low-speed driven tooth 13.

In addition, the present invention further includes a first bearing 15, a driven umbrella total gear 19, a second bearing 23, a first gear bushing 36, a second gear bushing 32, and other components, and the specific structure can refer to the prior art and the modified technology thereof, and will not be described herein again.

The four-wheel drive gearbox with the structure has the following transmission principle:

take first gear high speed and low speed as examples:

the clutch shaft 1 transmits power from the engine to a shaft 37, to a first-gear driving tooth 2 on the shaft 37, and then to a first-gear driven tooth 35. The first gear engagement sleeve 33 slides to the left to simultaneously engage the first gear driven tooth 35 and the second gear active tooth 34, thereby transmitting torque to the second shaft 40 to rotate the high speed driving tooth 28. (the first gear driven gear 35 is installed on the second shaft 40 through the I-gear bush 5, and does not directly generate torque transmission with the second shaft 40.) at this time, the high-speed sliding gear 26 slides leftwards, so that the high-speed driving gear 28 and the high-low speed action gear 27 are simultaneously meshed, torque is transmitted to the driving bevel gear shaft 20, and the driving bevel gear shaft 20 drives the central driven bevel gear assembly to rotate, so that high-speed driving of the rear wheel is realized. (Central passive bevel gear assembly includes differential assembly capable of eliminating the linear velocity inconsistency of left and right tires of vehicle when implementing vehicle turning, and gear matched with left and right half shafts so as to provide vehicle with rear driving capability.)

A first-gear low-speed gear: the clutch shaft 1 transmits power from the engine to a shaft 37 and the first-gear driving tooth 2, and then to the first-gear driven tooth 35. Sliding a second gear engaging sleeve 33 to the left simultaneously engages the first gear driven tooth 35 and the second gear active tooth, transmitting torque to the second shaft 40, which rotates the fourth gear driven tooth 29. Then the fourth-gear driving tooth 8 is driven to rotate, the second low-speed driven tooth 25 is driven to rotate by the low-speed driving tooth 9, at the moment, the high-speed sliding tooth 26 slides rightwards, the second low-speed driven tooth 25 and the high-low-speed acting tooth 27 are meshed simultaneously, torque is transmitted to the driving bevel gear shaft 20, and the driving bevel gear shaft 20 drives the central driven bevel gear assembly to rotate, so that low-speed driving of a rear wheel is realized. (the fourth gear driving tooth 8 and the low-speed driving tooth 9 are dual teeth and are integrated, and the fourth gear driving tooth 88 has the functions of transmitting the fourth gear torque and connecting the high-speed, the low-speed, the middle-speed and the middle-speed transmission.)

The four-wheel drive transmission with the structure is mainly driven in the driving process, and can realize four-wheel drive output by operating the four-wheel drive control part 39 when a muddy road or a road with poor road condition is walked, so that the driving capability is stronger. In addition, because the PTO output part 38 is arranged on the four-wheel drive gearbox, and the speed output by the PTO output part 38 can be adjusted, the power supply for various additional machines is convenient. Compared with the gearbox with the existing structure, the gearbox with the structure has the advantages of better driving capability, more reasonable overall structure, more complete functions and the like.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A four-wheel drive gearbox is used on a tractor and is characterized by comprising a box body, a first shaft and a second shaft, wherein the first shaft is arranged in the box body, and the second shaft is arranged in parallel with the first shaft;

a first-gear driving tooth, a second-gear driving tooth, a third-gear driving tooth and a fourth-gear driving tooth are sequentially arranged on the shaft, and a third-gear action tooth, a fourth-gear action tooth and a third-gear and fourth-gear engaging sleeve which can slide on the third-gear and fourth-gear action teeth are further arranged between the third-gear driving tooth and the fourth-gear driving tooth;

the first gear driven tooth, the second gear driven tooth, the third gear driven tooth and the fourth gear driven tooth are respectively used for being meshed with the first gear driving tooth, the second gear driving tooth, the third gear driving tooth and the fourth gear driving tooth;

a second-gear action tooth and a second-gear engaging sleeve which can slide on the second-gear action tooth are also arranged between the first-gear driving tooth and the second-gear driving tooth;

one end of the two shafts is also provided with an active bevel gear shaft, and one side of the active bevel gear shaft is also provided with a four-wheel drive control part for controlling the four-wheel drive to be opened and closed;

one end of the box body is also provided with a PTO output part used for providing power for the additional machine tool, and the speed output by the PTO output part is adjustable.

2. The four-wheel drive transmission according to claim 1, wherein the four-wheel drive control part comprises four-wheel drive driving teeth arranged on the driving bevel gear shaft, an intermediate shaft is further arranged on one side of the driving bevel gear shaft, and four-wheel drive bridge teeth meshed with the four-wheel drive driving teeth are arranged on the intermediate shaft.

3. The four-drive gearbox of claim 2, wherein the four-drive control part further comprises a front drive output shaft arranged on one side of the intermediate shaft, the front drive output shaft is further provided with four-drive sliding teeth capable of sliding on the front drive output shaft, and the four-drive sliding teeth can be meshed with the four-drive carrier teeth.

4. The four-wheel drive gearbox according to claim 3, wherein one side of the four-wheel drive sliding teeth is further provided with a shifting fork groove for arranging a shifting fork, and under the action of the shifting fork, the four-wheel drive sliding teeth can be meshed with or separated from the four-wheel drive bridging teeth.

5. The four-wheel drive gearbox according to claim 4, wherein a second low-speed driven tooth is further arranged at one end of the driving bevel gear shaft close to the two shafts, and a high-speed sliding tooth is arranged on one side of the second low-speed driven tooth, and the high-speed sliding tooth can move back and forth on the driving bevel gear shaft and can realize connection or separation of the driving bevel gear shaft and the two shafts.

6. The four-wheel drive transmission according to claim 5, wherein a low-speed driving tooth is further arranged on the shaft, and the low-speed driving tooth is arranged at one end of the fourth-gear driving tooth, which is far away from the third-gear driving tooth.

7. The four-wheel drive transmission according to claim 6, further comprising a PTO connecting shaft and a connecting sleeve disposed at one end of the PTO connecting shaft, wherein the PTO connecting shaft is detachably connected to the shaft through the connecting sleeve.

8. The four-wheel drive transmission according to claim 7, wherein the PTO output portion includes dual teeth disposed on the PTO coupling shaft, and a PTO output shaft disposed parallel to the PTO coupling shaft, the PTO output shaft further having PTO high-speed driven teeth and first low-speed driven teeth engaged with the PTO dual teeth.

9. The four-wheel drive gearbox according to claim 8, wherein a PTO output engaging sleeve is further arranged between the PTO high-speed driven tooth and the first low-speed driven tooth, a PTO output acting tooth is further arranged on the PTO output shaft, and the PTO output engaging sleeve is sleeved on the PTO output acting tooth and can slide on the PTO output acting tooth.

10. A tractor comprising a four-wheel drive gearbox, wherein the four-wheel drive gearbox is a gearbox according to any one of claims 1 to 9.