CN117090931A - Structure for preventing gear jump - Google Patents

Abstract

The application provides a structure for preventing gear jump, which comprises a power reversing-power high-low module and a mechanical gear shifting module, wherein the power reversing-power high-low module is positioned in a front gearbox body, the mechanical gear shifting module is positioned in a rear gearbox body, and the front gearbox body and the rear gearbox body are connected through a double-end stud. The application adopts three wet clutches and cooperates with electrohydraulic control, can realize power reversing and power high-low gear shifting at the same time, the power high-gear to power low-gear shifting process is carried out, the power is not interrupted in the whole shifting process, other shifting processes are similar, and the gear shifting of the whole section of the main speed change can be realized through the cooperation of the electric control gear shifting synchronizer and the two clutches.

Description

Structure for preventing gear jump

Technical Field

The application relates to the technical field of gear shifting and speed changing of tractors, in particular to a structure for preventing gear jump.

Background

The tractor is a very common agricultural machine, a diesel engine and a transmission speed change device thereof in the agricultural tractor are core components of the whole tractor, and an internal control mode of a speed change box of the tractor can greatly influence the control comfort level of a tractor driver.

As shown in fig. 1, the conventional power shift transmission case transmission mechanism comprises a first gear, a second gear, a third gear and a fourth gear, and a first wet clutch, a second wet clutch, a third wet clutch and a fourth wet clutch are arranged in the transmission case transmission mechanism

As shown in fig. 2, the existing unpowered reversing and power high-low gear gearbox transmission mechanism is provided with an input gear shaft, and the input gear shaft is provided with a reverse gear driving gear, a II gear driving gear, a III gear driving gear, an IV gear driving gear, a secondary speed middle gear driving gear, a secondary speed duplex gear, a secondary speed middle gear driven gear, a secondary speed low gear driven gear, a middle shaft, an IV gear driven gear, a III gear driven gear, a II gear driven gear reverse gear, an I gear driven gear and a driven gear.

Disclosure of Invention

The present application aims to provide a structure for preventing a jump stop which overcomes or at least partially solves the above-mentioned problems.

In order to achieve the above purpose, the technical scheme of the application is specifically realized as follows:

the application provides a structure for preventing a skip gear, which comprises a power reversing-power high-low module and a mechanical gear shifting module, wherein a transmission mechanism of a box body of an existing power shifting transmission comprises a first gear, a second gear, a third gear and a fourth gear, and a first wet clutch, a second wet clutch, a third wet clutch and a fourth wet clutch are arranged in the transmission mechanism; the existing unpowered reversing and power high-low gear gearbox transmission mechanism is provided with an input gear shaft, and the input gear shaft is provided with a reverse gear comprising a reverse gear driving gear, a second gear driving gear, a third gear driving gear, an IV gear driving gear, a secondary gear middle gear driving gear, a secondary gear duplex gear, a secondary gear middle gear driven gear, a secondary gear low gear driven gear, a middle shaft, an IV gear driven gear, a third gear driven gear, a second gear driven gear reverse gear, a first gear driven gear and a driven gear; the power reversing-power high-low module is positioned in the front gearbox body, the mechanical gear shifting module is positioned in the rear gearbox body, the front gearbox body and the rear gearbox body are connected through a double-end stud, and the power reversing-power high-low module is fixed with the mechanical gear shifting module through the double-end stud, the nut and the gasket between the front gearbox body and the rear gearbox body; the power reversing-power high-low module is provided with a power high-low gear clutch and a gear set, and comprises a torsional damper, an oil seal seat, an oil inlet end closing piece, a reverse gear transition shaft, a reverse gear transition gear, a reverse gear driving gear, a main clutch closing piece, a gearbox front box body, a low gear driving gear, a power high gear clutch, a high gear direct gear, a stud, a nut, a gasket, a reverse-low gear transition gear, a rear shaft sleeve, a low gear driven gear, an oil drain screw plug, a spline shaft, a front shaft sleeve, a reverse gear driven gear, a reverse gear end cover, a detection window cover, a first sealing ring, a second sealing ring, an oil guide pipe and a third sealing ring;

three walls are arranged in the front box body of the gearbox in parallel from front to back, three holes are arranged in the first wall in parallel, the second wall and the third wall are half walls from bottom to top, and a hole is arranged concentrically with the lower hole of the first wall respectively; one end of the reverse gear transition shaft is an end cover, the other end of the reverse gear transition shaft is of an optical axis structure, the reverse gear transition shaft is coaxially arranged in one hole of the first wall of the front gearbox body, and the extending end of the reverse gear transition shaft faces backwards and is fixed on the first wall through bolts; the inner hole of the reverse gear transition gear is sequentially provided with a bearing, a retainer ring for the hole, a bearing spacer ring and a bearing, and the extending end of the reverse gear transition shaft is provided with a retainer ring for the shaft to be fixed;

the oil inlet end closing piece is coaxially arranged in a hole of a first wall of the front gearbox body, and a bearing, an oil seal seat and a sealing ring are sequentially arranged in an inner hole of the oil inlet end closing piece from left to right; the bearing, the bearing spacer ring and the bearing are sequentially arranged in the inner hole of the reverse gear driving gear, the external spline of the reverse gear driving gear is arranged, and the optical axis end of the oil inlet end closing piece is inserted into the inner hole bearing of the main gear; the bearing, the bearing spacer and the bearing are sequentially arranged in the inner hole of the low-gear driving gear, one end of an external spline of the low-gear driving gear is coaxially arranged on the main clutch fitting piece, the low-gear driving gear is arranged at the left end of the main clutch fitting piece, the right end of the main clutch fitting piece is arranged in the inner hole of the oil inlet end cover fitting piece, and the external spline of the reverse-gear driving gear is meshed with the inner hole of the reverse-gear clutch;

the low-gear driven gear is arranged between a second wall and a third wall of the front gearbox body, a bearing is arranged in an inner hole of the third wall, a reverse-low gear transition gear is arranged on the right side of the third wall, a spline shaft is arranged in the steering direction of the reverse-low gear transition gear, the inner hole of the bearing of the third wall, a rear shaft sleeve inner hole, a low-gear driven gear inner hole, an inner hole of the second wall, a front shaft sleeve inner hole and a reverse-gear driven gear inner hole are sequentially arranged on the spline shaft from right to left, the rightmost end of the spline shaft is fixed by a check ring for the shaft, the left end of the spline shaft is arranged in a bearing of the inner hole of the first wall, and the reverse-low gear transition gear, the low-gear driven gear and the reverse-gear driven gear inner hole are respectively meshed with an external spline of the spline shaft through internal splines; the reverse gear end cover is coaxially arranged on an inner hole of the first wall through a bolt;

the mechanical gear shifting module is arranged in a rear gearbox body and comprises an input shaft end cover, a rear gearbox body, an input shaft, a first-gear driving gear, a second-gear driving gear, a third-gear driving gear, a fourth-gear driving gear, a duplex gear shaft sleeve, a secondary speed middle-gear driving gear, a secondary speed duplex gear, a bearing cover, an output shaft, a secondary speed middle-gear driven gear, a meshing tooth seat, a meshing tooth sleeve, an output shaft sleeve, a secondary speed low-gear driven gear, a high-gear meshing tooth sleeve, a high-gear meshing tooth seat, a low-gear meshing tooth seat, a middle shaft, a fourth-gear driven gear, a synchronizer, a third-gear driven gear, a second-gear driven gear, a bushing, a first-gear driven gear, a spline connecting sleeve, a power output front-section shaft and a planetary structure crawling gear;

three walls are arranged in the rear box body of the gearbox in parallel, namely a fourth wall, a fifth wall and a sixth wall from left to right, an upper hole and a lower hole are arranged on the three walls in parallel, and needle bearings and bushings thereof are arranged in inner holes of a first-gear driven gear, a second-gear driven gear, a third-gear driven gear and a fourth-gear driven gear; a bearing is arranged in a hole below the fifth wall, a first-gear driven gear, a synchronizer, a second-gear driven gear, a spacer ring, a third-gear driven gear, a synchronizer, a fourth-gear driven gear and a spacer ring are sequentially arranged between the fourth wall and the hole below the fifth wall from left to right, and a middle shaft is arranged in the center of the parts in a penetrating manner;

a first gear driving gear, a shaft sleeve, a second gear driving gear, a third gear driving gear, a shaft sleeve and a fourth gear driving gear are sequentially arranged between the upper holes of the fourth wall and the upper holes of the fifth wall from left to right, an input shaft is installed in the center of each component in a penetrating manner, and an input shaft end cover is arranged on the fourth wall through bolts; a high-low gear meshing gear sleeve, a high-low gear meshing gear seat, a secondary gear middle-gear driven gear, an output shaft sleeve, a meshing gear sleeve, a secondary gear middle-gear driven gear and a spacer ring are sequentially arranged between the lower holes of the fifth wall and the sixth wall from left to right, an output shaft is arranged at the central positions of the components, and the output shaft and the intermediate shaft are coaxially arranged; the auxiliary speed change duplex gear is coaxially arranged at the right end of the input shaft, a duplex gear shaft sleeve and an auxiliary speed change middle gear driving gear are sequentially sleeved on the right side of the auxiliary speed change duplex gear, a duplex gear shaft is meshed with a spline of an inner hole of the auxiliary speed change middle gear driving gear, and a bearing cover is arranged in an upper hole wall of the sixth wall.

As a further scheme of the application, a first sealing ring is arranged at one end of the oil guide pipe, a second sealing ring is arranged at the other end of the oil guide pipe, one end of the oil guide pipe penetrates through the front gearbox body and is connected with one end of the oil inlet end cover, and the other end of the oil guide pipe is connected with an oil duct of the front gearbox body through a third sealing ring.

As a further scheme of the application, the main clutch assembly comprises a reverse gear clutch, a main clutch shaft and a power low gear clutch, wherein the main clutch shaft is parallel to the axis direction and is provided with four oil channels along the circumferential direction, one end of the main clutch shaft is provided with four annular grooves along the circumferential direction, the other end of the main clutch shaft is provided with an annular groove along the circumferential direction, and radial oil channels parallel to the axis of the main clutch shaft are respectively arranged in the annular grooves.

As a further scheme of the application, a working oil duct and a lubricating oil duct are arranged between the reverse clutch and the main clutch shaft, a working oil duct and a lubricating oil duct are arranged between the power low clutch and the main clutch shaft, and a working oil duct and a lubricating oil duct are arranged between the power high clutch and the main clutch shaft; four oil ducts are arranged on one side of the front gearbox body in parallel, a detection window is arranged above the four oil ducts, and a detection window cover is arranged on the detection window.

As a further scheme of the application, the oil end closing piece comprises an oil inlet end cover and a screw plug, wherein two holes are formed in the position, parallel to the axis, of the end face of the oil inlet end cover, two holes are formed in an inner hole of the oil inlet end cover, a plane is formed on one side of the circumference of the oil inlet end cover, four holes are formed in the plane, and the four holes are respectively an advancing high-blocking opening, an advancing low-blocking opening, a reverse blocking opening and a lubricating opening, wherein the advancing high-blocking opening and the lubricating opening are communicated with the two holes in the end face of the oil inlet end cover, and the advancing low-blocking opening and the reverse blocking opening are communicated with the two holes in the inner hole of the oil inlet end cover.

As a further scheme of the application, one ends of the four oil channels of the oil inlet end cover are respectively corresponding to and communicated with the four annular grooves of the main clutch shaft, the other ends of the four oil channels of the oil inlet end cover are respectively corresponding to and communicated with the four oil channels of the front gearbox body, and electromagnetic valves are arranged on the four oil channels of the front gearbox body, so that the arrangement of the electromagnetic valves to the hydraulic oil channels of the clutch can be realized.

As a further scheme of the application, the planetary structure crawling gear is fixed on the lower hole wall of the sixth wall through bolts; and one end of a front section shaft of the power output front section shaft is provided with a shaft check ring, and the other end of the power output front section shaft is connected with a spline connecting sleeve.

The application provides a structure for preventing a jump stop, which has the beneficial effects that: 1. the application adopts three wet clutches and cooperates with electrohydraulic control to realize power reversing and power high-low gear shifting simultaneously;

2. the application adopts a modularized design, and is divided into a power reversing-power high-low module and a mechanical gear shifting module, wherein the power reversing-power high-low module and the mechanical gear shifting module are meshed through a spline, the power reversing-power high-low module is positioned in a front box body of the gearbox, the mechanical gear shifting module is positioned in a rear box body of the gearbox, and the two box bodies are connected through a double-end stud, so that the disassembly, the assembly and the maintenance are convenient; the power reversing-power high-low module and the mechanical gear shifting module can be designed in a zooming way and are applied to other horsepower section tractors;

3. in the power reversing-power high-low module, the power reversing clutch and the power high-grade clutch are controlled to be arranged on the same shaft in a concentrated manner, and are not completely soaked in oil, so that the power loss can be effectively reduced;

4. the hydraulic oil ways are arranged in the wall of the box body, the oil inlet end cover and the main clutch shaft in a centralized way, the oil ways of the wall of the box body and the oil ways of the oil inlet end cover are in one-to-one correspondence and are connected by adopting oil guide pipes, and the oil ways are arranged in a smooth way;

5. the mechanical gear shifting module is arranged in a rear box body of the gearbox, wherein the main gear shifting section adopts synchronous gear shifting, and a power high gear and a power low gear are built in;

6. the power is not interrupted in the whole gear shifting process in the gear shifting process from the high power gear to the low power gear, and the rest gear shifting processes are similar, and the gear shifting of the whole section of the main speed change can be realized through the cooperation of the electric control gear shifting synchronizer and the two clutches;

7. four gears are arranged in the auxiliary speed change area, three gears are normal working areas, one gear is a crawling gear of a planetary structure, no gears are crossed, and the gears are distributed according to a certain level ratio, so that the auxiliary speed change area is quite reasonable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a prior art powershift transmission housing transmission mechanism.

FIG. 2 is a schematic diagram of a conventional unpowered reverse and powered high and low range gearbox transmission mechanism.

Fig. 3 is a cross-sectional view of the structure of the present application.

FIG. 4 is a cross-sectional view of the structure at position A-A in the present application.

Fig. 5 is a power upshift transmission route of the present application.

Fig. 6 shows the power down transmission route of the present application.

Fig. 7 shows a power transmission path of the present application.

Fig. 8 is a schematic structural view of a main clutch assembly according to the present application.

Fig. 9 is a schematic structural view of a front case of the transmission according to the present application.

FIG. 10 is a schematic view of the structure of the oil feed end closure of the present application.

In the figure: a1, a first gear; a2, a second gear; a3, third gear; a4, fourth gear; c1, a first wet clutch; c2, a second wet clutch; c3, a third wet clutch; c4, a fourth wet clutch; b1, an input gear shaft; 1. a torsional vibration damper; 2. an oil seal seat; 3. an oil inlet end closure; 301. an oil inlet end cover; 302. a screw plug; 4. a reverse gear transition shaft; 5. a reverse transition gear; 6. a reverse gear driving gear; 7. a main clutch engagement member; 701. a reverse clutch; 702. a main clutch shaft; 703. a power low clutch; 704. advancing the high-gear opening; 705. advancing the low-gear opening; 706. a reverse gear port; 707. a lubrication port; 8. a gearbox front case; 9. a low gear drive gear; 10. a power high clutch; 11. high gear direct gear; 12. an input shaft end cap; 13. a gearbox rear case; 14. an input shaft; 15. a first gear driving gear; 16. a II-gear driving gear; 17. III gear driving gear; 18. IV gear driving gear; 19. a duplex gear sleeve; 20. a secondary gear drive gear; 21. a secondary variable speed duplicate gear; 22. a bearing cap; 23. an output shaft; 24. a secondary gear shift middle-gear driven gear; 25. engaging the tooth holder; 26. engaging the gear sleeve; 27. an output shaft sleeve; 28. a secondary shift low-gear passive gear; 29. high-low gear meshing gear sleeve; 30. the high gear and the low gear are meshed with the tooth holder; 31. an intermediate shaft; 32. IV gear driven gear; 33. a synchronizer; 34. III gear driven gear; 35. a II-gear driven gear; 36. a bushing; 37. a first-gear driven gear; 38. a double-ended stud; 39. a nut; 40. a gasket; 41. an inverted-low transition gear; 42. a rear sleeve; 43. a low range passive gear; 44. an oil drain screw plug; 45. a spline shaft; 46. a front sleeve; 47. reverse gear driven gear; 48. a reverse gear end cover; 49. a detection window cover; 50. a first seal ring; 51. a second seal ring; 52. an oil guide pipe; 53. a third seal ring; 54. a spline connecting sleeve; 55. a power output front section shaft; 56. planetary structure creeper gear.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Referring to fig. 1 and 2, the existing power shift transmission box body transmission mechanism comprises a first gear A1, a second gear A2, a third gear A3 and a fourth gear A4, wherein a first wet clutch C1, a second wet clutch C2, a third wet clutch C3 and a fourth wet clutch C4 are arranged in the transmission box body transmission mechanism, the transmission box body transmission mechanism is controlled through four wet clutches, the transmission box body transmission mechanism is complex in structure and high in manufacturing cost, and the combination of the four wet clutches enables the axial size to be overlong, so that the stability is affected.

The existing unpowered reversing and power high-low gear transmission mechanism is provided with an input gear shaft B1, and the input gear shaft B1 is provided with a reverse gear driving gear 6, a II gear driving gear 16, a III gear driving gear 17, an IV gear driving gear 18, a secondary shifting middle gear driving gear 20, a secondary shifting duplex gear 21, a secondary shifting middle gear driven gear 24, a secondary shifting low gear driven gear 28, an intermediate shaft 31, an IV gear driven gear 32, a III gear driven gear 34, a II gear driven gear reverse gear 35, an I gear driven gear 37 and a driven gear 47, wherein the power reversing and power high-low gear is not arranged, and the gear shifting can not be realized under the condition of not cutting off power.

Referring to fig. 3-10, the structure for preventing gear jump provided by the embodiment of the application comprises a power reversing-power high-low module and a mechanical gear shifting module, wherein the power reversing-power high-low module is positioned in a front gearbox body 8, the mechanical gear shifting module is positioned in a rear gearbox body 13, the front gearbox body 8 and the rear gearbox body 13 are connected through a stud 38, the disassembly and the maintenance are convenient, and the power reversing-power high-low module and the mechanical gear shifting module are fixed through the stud 38, a nut 39 and a gasket 40 between the front gearbox body 8 and the rear gearbox body 13; the power reversing-power high-low module is provided with a power high-low gear clutch and a gear set, and comprises a torsional damper 1, an oil seal seat 2, an oil inlet end closing part 3, a reverse gear transition shaft 4, a reverse gear transition gear 5, a reverse gear driving gear 6, a main clutch closing part 7, a gearbox front box body 8, a low gear driving gear 9, a power high-gear clutch 10, a high-gear direct gear 11, a double-headed stud 38, a nut 39, a gasket 40, a reverse-low gear transition gear 41, a rear shaft sleeve 42, a low gear driven gear 43, an oil drain screw plug 44, a spline shaft 45, a front shaft sleeve 46, a reverse gear driven gear 47, a reverse gear end cover 48, a detection window cover 49, a first sealing ring 50, a second sealing ring 51, an oil guide pipe 52 and a third sealing ring 53.

Three walls are arranged in the front box body of the gearbox in parallel from front to back, three holes are arranged in the first wall in parallel, the second wall and the third wall are half walls from bottom to top, and a hole is arranged concentrically with the lower hole of the first wall respectively; one end of the reverse gear transition shaft 4 is an end cover, the other end of the reverse gear transition shaft is of an optical axis structure, the reverse gear transition shaft 4 is coaxially arranged in one hole of the first wall of the gearbox front box body 8, and the extending end of the reverse gear transition shaft 4 faces backwards and is fixed on the first wall through bolts; the inner hole of the reverse gear transition gear 5 is sequentially provided with a bearing, a hole retainer ring, a bearing spacer ring and a bearing, and the extending end of the reverse gear transition shaft 4 is provided with a shaft retainer ring for fixing.

The oil inlet end closing piece 3 is coaxially arranged in a hole of a first wall of the gearbox front box body 8, and a bearing, an oil seal seat 2 and a sealing ring are sequentially arranged in an inner hole of the oil inlet end closing piece 3 from left to right; the bearing, the bearing spacer ring and the bearing are sequentially arranged in the inner hole of the reverse gear driving gear 6, the external spline of the reverse gear driving gear 6 is arranged, and the optical axis end of the oil inlet end closing piece 3 is inserted into the inner hole bearing of the main gear 6; the bearing, the bearing spacer ring and the bearing are sequentially arranged in the inner hole of the low-gear driving gear 9, one end of an external spline of the low-gear driving gear 9 is coaxially arranged on the main clutch fitting piece 7, the low-gear driving gear 9 is arranged at the left end of the main clutch fitting piece 7, the right end of the main clutch fitting piece 7 is arranged in the inner hole of the oil inlet end fitting piece 3, and the external spline of the reverse-gear driving gear 6 is meshed with the inner hole of the reverse-gear clutch 701.

The low-gear driven gear 43 is arranged between a second wall and a third wall of the gearbox front box body 8, a bearing is arranged in the inner hole of the third wall, a reverse-low gear transition gear 41 is arranged on the right side of the third wall, a spline shaft 45 is arranged on the reverse-low gear transition gear 41 in a steering way, the reverse-low gear transition gear 41, the inner hole of the bearing of the third wall, the inner hole of a rear shaft sleeve 42, the inner hole of the low-gear driven gear 43, the inner hole of the second wall, the inner hole of a front shaft sleeve 46 and the inner hole of a reverse-gear driven gear 47 are sequentially arranged on the spline shaft 45 from right to left, the rightmost end of the spline shaft 45 is fixed by a retainer ring for a shaft, the left end of the spline shaft 45 is arranged in the inner hole of the first wall by the retainer ring for a shaft, and the reverse-low gear transition gear 41, the low-gear driven gear 43 and the inner hole of the reverse-gear driven gear 47 are respectively meshed and arranged by the inner spline shaft 45 by the outer spline; the reverse end cap 48 is coaxially mounted to the inner bore of the first wall by bolts.

One end of the oil guide pipe 52 is provided with a first sealing ring 50, the other end of the oil guide pipe 52 is provided with a second sealing ring 51, one end of the oil guide pipe 52 penetrates through the gearbox front box body 8 and is connected with one end of the oil inlet end cover 301, and the other end of the oil guide pipe 52 is connected with an oil duct of the gearbox front box body 8 through a third sealing ring 53.

The main clutch assembly 7 comprises a reverse clutch 701, a main clutch shaft 702 and a power low-gear clutch 703, wherein the main clutch shaft 702 is parallel to the axial direction and provided with four oil channels along the circumferential direction, one end of the main clutch shaft 702 is provided with four annular grooves along the circumferential direction, the other end of the main clutch shaft 702 is provided with an annular groove along the circumferential direction, and radial oil channels parallel to the axial line of the main clutch shaft 702 are respectively arranged in the annular grooves; a working oil passage and a lubrication oil passage are formed between the reverse clutch 701 and the main clutch shaft 702, a working oil passage and a lubrication oil passage are formed between the low power clutch 703 and the main clutch shaft 702, and a working oil passage and a lubrication oil passage are formed between the high power clutch 10 and the main clutch shaft 702.

Four oil ducts are arranged on one side of the front gearbox body 8 in parallel, a detection window is arranged above the four oil ducts, and a detection window cover 49 is arranged on the detection window.

The oil inlet end cover assembly 3 comprises an oil inlet end cover 301 and a screw plug 302, wherein two holes are formed in the position, parallel to the axis, of the end face of the oil inlet end cover 301, two holes are formed in an inner hole of the end cover of the oil inlet end cover 301, a plane is formed on one side of the circumference of the oil inlet end cover 301, four holes, namely an advancing high-gear opening 704, an advancing low-gear opening 705, a reverse-gear opening 706 and a lubrication opening 707, are formed in the plane, the advancing high-gear opening 704 and the lubrication opening 707 are communicated with the two holes in the end face of the oil inlet end cover 301, and the advancing low-gear opening 705 and the reverse-gear opening 706 are communicated with the two holes in the inner hole of the oil inlet end cover 301; one ends of the four oil channels of the oil inlet end cover 301 correspond to and are communicated with the four annular grooves of the main clutch shaft 702 respectively, the other ends of the four oil channels of the oil inlet end cover 301 correspond to and are communicated with the four oil channels of the gearbox front box body 8 respectively, electromagnetic valves are arranged on the four oil channels of the gearbox front box body 8 respectively, and arrangement of hydraulic oil paths from the electromagnetic valves to clutches can be achieved.

The mechanical gear shifting module is arranged in a gearbox rear box body 13 and comprises an input shaft end cover 12, a gearbox rear box body 13, an input shaft 14, a first-gear driving gear 15, a second-gear driving gear 16, a third-gear driving gear 17, an fourth-gear driving gear 18, a duplex gear shaft sleeve 19, a secondary gear middle-gear driving gear 20, a secondary gear duplex gear 21, a bearing cover 22, an output shaft 23, a secondary gear middle-gear driven gear 24, a meshing tooth seat 25, a meshing tooth sleeve 26, an output shaft sleeve 27, a secondary gear low-gear driven gear 28, a high-gear meshing tooth sleeve 29, a high-gear meshing tooth seat 30, a middle shaft 31, a fourth-gear driven gear 32, a synchronizer 33, a third-gear driven gear 34, a second-gear driven gear 35, a bushing 36, a first-gear driven gear 37, a spline connecting sleeve 54, a power output front-section shaft 55 and a planetary structure crawling gear 56.

Three walls are arranged in parallel in the gearbox rear box body 13, namely a fourth wall, a fifth wall and a sixth wall from left to right, an upper hole and a lower hole are arranged on the three walls in parallel, and needle bearings and bushings thereof are arranged in inner holes of a first-gear driven gear 37, a second-gear driven gear 35, a third-gear driven gear 34 and an IV-gear driven gear 32; a bearing is arranged in a hole below the fifth wall, a first-gear driven gear 37, a synchronizer 33, a second-gear driven gear 35, a spacer ring, a third-gear driven gear 34, the synchronizer 33, a fourth-gear driven gear 32 and a spacer ring are sequentially arranged between the fourth wall and the hole below the fifth wall from left to right, and a middle shaft 31 is installed in the center of the parts in a penetrating manner.

The I-gear driving gear 15, the shaft sleeve, the II-gear driving gear 16, the III-gear driving gear 17, the shaft sleeve and the IV-gear driving gear 18 are sequentially arranged between the upper holes of the fourth wall and the upper hole of the fifth wall from left to right, the input shaft 14 is installed in the center of the parts in a penetrating mode, the input shaft end cover 12 is arranged on the fourth wall through bolts, and the input shaft end cover 12 limits one end of the input shaft 14.

A high-low gear meshing gear sleeve 29, a high-low gear meshing gear seat 30, a secondary gear middle gear driven gear 28, an output shaft sleeve 27, a meshing gear 25, a meshing gear sleeve 26, a secondary gear middle gear driven gear 24 and a space ring are sequentially arranged between the lower holes of the fifth wall and the sixth wall from left to right, an output shaft 23 is arranged in the center of each component, and the output shaft 23 and an intermediate shaft 31 are coaxially arranged; the auxiliary speed change duplex gear 21 is coaxially arranged at the right end of the input shaft 14, a duplex gear shaft sleeve 19 and an auxiliary speed change middle gear driving gear 20 are sequentially sleeved on the right side of the auxiliary speed change duplex gear 21, the duplex gear shaft 19 is meshed with a spline of an inner hole of the auxiliary speed change middle gear driving gear 20, and a bearing cover 22 is arranged in an upper hole wall of the sixth wall.

The planetary structure crawling gear 56 is fixed on the wall of the lower hole of the sixth wall through bolts; and a shaft check ring is arranged at one end of the front section shaft of the power output front section shaft 55, and the other end of the power output front section shaft 55 is connected with a spline connecting sleeve 54.

The application sets three gears of power high gear, power low gear and power reverse gear, when the gear is in the power high gear, only the power high gear clutch 10 is combined at the moment, the other two clutches are in a separation state, and the synchronizer 33 is engaged with the I gear driven gear 37 at the moment, as shown in fig. 5; according to the detected engine torque and other data, the synchronizer 33 is combined in advance through an electric control system, the power high-gear clutch 10 is separated gradually, the power low-gear clutch 703 is separated and combined gradually, and therefore the power high-gear is converted into the power low-gear, and the power is not interrupted in the whole gear shifting process, as shown in fig. 6; the rest of the shift process is similar as shown in fig. 7.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims (7)

1. The utility model provides a structure for preventing gear jump, includes power reversing-power high-low module and mechanical gear shifting module, and current power shifting transmission box drive mechanism includes first gear (A1), second gear (A2), third gear (A3) and fourth gear (A4), has set up first wet clutch (C1), second wet clutch (C2), third wet clutch (C3) and fourth wet clutch (C4) inside; the existing unpowered reversing and power high-low gear gearbox transmission mechanism is provided with an input gear shaft (B1), wherein the input gear shaft (B1) is provided with a reverse gear driving gear (6), a II gear driving gear (16), a III gear driving gear (17), an IV gear driving gear (18), a secondary gear middle gear driving gear (20), a secondary gear duplex gear (21), a secondary gear middle gear driven gear (24), a secondary gear low gear driven gear (28), an intermediate shaft (31), an IV gear driven gear (32), a III gear driven gear (34), a II gear driven gear reverse gear (35), an I gear driven gear (37) and a driven gear (47); the mechanical gear shifting device is characterized in that the power reversing-power high-low module is positioned in a front gearbox body (8), the mechanical gear shifting module is positioned in a rear gearbox body (13), the front gearbox body (8) and the rear gearbox body (13) are connected through a double-end stud (38), and the power reversing-power high-low module and the mechanical gear shifting module are fixed through the double-end stud (38), a nut (39) and a gasket (40) between the front gearbox body (8) and the rear gearbox body (13); the power reversing-power high-low module is provided with a power high-low gear clutch and a gear set, and comprises a torsional damper (1), an oil seal seat (2), an oil inlet end closing piece (3), a reverse gear transition shaft (4), a reverse gear transition gear (5), a reverse gear driving gear (6), a main clutch closing piece (7), a gearbox front box body (8), a low gear driving gear (9), a power high-gear clutch (10), a high-gear direct gear (11), a double-end stud (38), a nut (39), a gasket (40), a reverse-low gear transition gear (41), a rear shaft sleeve (42), a low gear driven gear (43), an oil drain plug screw (44), a spline shaft (45), a front shaft sleeve (46), a reverse gear driven gear (47), a reverse gear end cover (48), a detection window cover (49), a first sealing ring (50), a second sealing ring (51), an oil guide pipe (52) and a third sealing ring (53);

three walls are arranged in the front box body of the gearbox in parallel from front to back, three holes are arranged in the first wall in parallel, the second wall and the third wall are half walls from bottom to top, and a hole is arranged concentrically with the lower hole of the first wall respectively; one end of the reverse gear transition shaft (4) is an end cover, the other end of the reverse gear transition shaft is of an optical axis structure, the reverse gear transition shaft (4) is coaxially arranged in one hole of a first wall of a front gearbox body (8), and the extending end of the reverse gear transition shaft (4) faces backwards and is fixed on the first wall through bolts; the inner hole of the reverse gear transition gear (5) is sequentially provided with a bearing, a hole retainer ring, a bearing spacer ring and a bearing, and the extending end of the reverse gear transition shaft (4) is provided with a shaft retainer ring for fixing;

the oil inlet end closing piece (3) is coaxially arranged in a hole of a first wall of the gearbox front box body (8), and a bearing, an oil seal seat (2) and a sealing ring are sequentially arranged in an inner hole of the oil inlet end closing piece (3) from left to right; the bearing, the bearing spacer ring and the bearing are sequentially arranged in the inner hole of the reverse gear driving gear (6), the external spline of the reverse gear driving gear (6) is arranged, and the optical axis end of the oil inlet end closing piece (3) is inserted into the inner hole bearing of the main gear (6); the bearing, the bearing spacer ring and the bearing are sequentially arranged in an inner hole of the low-gear driving gear (9), one end of an external spline of the low-gear driving gear (9) is coaxially arranged on the main clutch fitting piece (7), the low-gear driving gear (9) is arranged at the left end of the main clutch fitting piece (7), the right end of the main clutch fitting piece (7) is arranged in an inner hole of the oil inlet end fitting piece (3), and the external spline of the reverse gear driving gear (6) is meshed with the inner hole of the reverse gear clutch (701);

the low-gear driven gear (43) is arranged between a second wall and a third wall of the front gearbox body (8), a bearing is arranged in an inner hole of the third wall, a reverse-low gear transition gear (41) is arranged on the right side of the third wall, a spline shaft (45) is arranged in the steering direction of the reverse-low gear transition gear (41), an inner hole of the bearing of the third wall, an inner hole of a rear shaft sleeve (42), an inner hole of the low-gear driven gear (43), an inner hole of the second wall, an inner hole of a front shaft sleeve (46) and an inner hole of a reverse-gear driven gear (47) are sequentially arranged on the spline shaft (45), the rightmost end of the spline shaft (45) is fixed by adopting a retainer ring, the left end of the spline shaft (45) is arranged in the inner hole bearing of the first wall through a retainer ring for the shaft, and the reverse-low gear transition gear (41), the low-gear driven gear (43) and the inner hole of the reverse-gear driven gear (47) are respectively arranged with an external spline of the spline shaft (45) through an internal spline; the reverse gear end cover (48) is coaxially arranged on an inner hole of the first wall through a bolt;

the mechanical gear shifting module is arranged in a gearbox rear box body (13) and comprises an input shaft end cover (12), a gearbox rear box body (13), an input shaft (14), a first-gear driving gear (15), a second-gear driving gear (16), a third-gear driving gear (17), a fourth-gear driving gear (18), a duplex gear shaft sleeve (19), a secondary gear middle-gear driving gear (20), a secondary gear duplex gear (21), a bearing cover (22), an output shaft (23), a secondary gear middle-gear driven gear (24), a meshing toothed seat (25), a meshing toothed sleeve (26), an output shaft sleeve (27), a secondary gear low-gear driven gear (28), a high-gear meshing toothed sleeve (29), a high-gear meshing toothed seat and a low-gear meshing toothed seat (30), a middle shaft (31), a fourth-gear driven gear (32), a synchronizer (33), a third-gear driven gear (34), a second-gear driven gear (35), a bushing (36), a first-gear driven gear (37), a spline (54), a power output front-stage shaft (55) and a planetary structure crawling gear (56);

three walls are arranged in the gearbox rear box body (13) in parallel, namely a fourth wall, a fifth wall and a sixth wall from left to right, an upper hole and a lower hole are arranged on the three walls in parallel, and needle bearings and bushings thereof are arranged in inner holes of a first-gear driven gear (37), a second-gear driven gear (35), a third-gear driven gear (34) and an IV-gear driven gear (32); a bearing is arranged in a hole below the fifth wall, a first-gear driven gear (37), a synchronizer (33), a second-gear driven gear (35), a spacer ring, a third-gear driven gear (34), the synchronizer (33), a fourth-gear driven gear (32) and the spacer ring are sequentially arranged between the fourth wall and the hole below the fifth wall from left to right, and an intermediate shaft (31) is installed in the center of the parts in a penetrating manner;

an I-gear driving gear (15), a shaft sleeve, an II-gear driving gear (16), an III-gear driving gear (17), a shaft sleeve and an IV-gear driving gear (18) are sequentially arranged between the upper holes of the fourth wall and the upper holes of the fifth wall from left to right, an input shaft (14) is installed in the center of the parts in a penetrating mode, and an input shaft end cover (12) is arranged on the fourth wall through bolts; a high-low gear meshing gear sleeve (29), a high-low gear meshing gear seat (30), a secondary gear middle gear driven gear (28), an output shaft sleeve (27), a meshing gear (25), a meshing gear sleeve (26), a secondary gear middle gear driven gear (24) and a spacer ring are sequentially arranged between lower holes of the fifth wall and the sixth wall from left to right, an output shaft (23) is arranged in the center of each component, and the output shaft (23) and an intermediate shaft (31) are coaxially arranged; the auxiliary speed change duplex gear (21) is coaxially arranged at the right end of the input shaft (14), a duplex gear shaft sleeve (19) and an auxiliary speed change middle gear driving gear (20) are sequentially sleeved on the right side of the auxiliary speed change duplex gear (21), the duplex gear shaft (19) is meshed with a spline of an inner hole of the auxiliary speed change middle gear driving gear (20), and a bearing cover (22) is arranged in the hole wall above the sixth wall.

2. The structure for preventing gear jump according to claim 1, wherein a first sealing ring (50) is provided at one end of the oil guide pipe (52), a second sealing ring (51) is provided at the other end of the oil guide pipe (52), one end of the oil guide pipe (52) penetrates through the front gearbox body (8) and is connected with one end of the oil inlet end cover (301), and the other end of the oil guide pipe (52) is connected with an oil duct of the front gearbox body (8) through a third sealing ring (53).

3. The structure for preventing gear jump according to claim 1, wherein the main clutch fitting (7) comprises a reverse clutch (701), a main clutch shaft (702) and a power low clutch (703), wherein the main clutch shaft (702) is parallel to the axial direction and is provided with four oil passages in the circumferential direction, one end of the main clutch shaft (702) is provided with four annular grooves in the circumferential direction, the other end of the main clutch shaft (702) is provided with an annular groove in the circumferential direction, and radial oil passages parallel to the axial line of the main clutch shaft (702) are respectively provided in the annular grooves.

4. The structure for preventing gear jump according to claim 1, wherein a working oil passage and a lubrication oil passage are provided between the reverse clutch (701) and the main clutch shaft (702), a working oil passage and a lubrication oil passage are provided between the power low clutch (703) and the main clutch shaft (702), and a working oil passage and a lubrication oil passage are provided between the power high clutch (10) and the main clutch shaft (702); four oil ducts are arranged on one side of the front gearbox body (8) in parallel, a detection window is arranged above the four oil ducts, and a detection window cover (49) is arranged on the detection window.

5. A structure for preventing jump according to claim 1, characterized in that the oil end closing member (3) comprises an oil inlet end cover (301) and a screw plug (302), wherein two holes are arranged at the position, parallel to the axis, of the end face of the oil inlet end cover (301), two holes are arranged in the inner hole of the end cover of the oil inlet end cover (301), a plane is arranged on one circumferential side of the oil inlet end cover (301), four holes, namely an advance high-gear opening (704), an advance low-gear opening (705), a reverse-gear opening (706) and a lubrication opening (707), are respectively arranged on the plane, wherein the advance high-gear opening (704), the lubrication opening (707) are communicated with the two holes on the end face of the oil inlet end cover (301), and the advance low-gear opening (705) and the reverse-gear opening (706) are communicated with the two holes of the inner hole of the oil inlet end cover (301).

6. The structure for preventing gear jump according to claim 5, wherein one ends of four oil channels of the oil inlet end cover (301) are respectively corresponding to and communicated with four annular grooves of the main clutch shaft (702), the other ends of the four oil channels of the oil inlet end cover (301) are respectively corresponding to and communicated with four oil channels of the gearbox front case (8), and electromagnetic valves are arranged on the four oil channels of the gearbox front case (8), so that arrangement of hydraulic oil channels from the electromagnetic valves to the clutches can be realized.

7. A structure for preventing jump according to claim 1, characterized in that said planetary structure creeper gear (56) is fixed to the wall of the lower hole of the sixth wall by means of bolts; a shaft check ring is arranged at one end of a front section shaft of the power output front section shaft (55), and the other end of the power output front section shaft (55) is connected with a spline connecting sleeve (54).