CN215487469U

CN215487469U - Gearbox assembly with section power gear shifting function for tractor

Info

Publication number: CN215487469U
Application number: CN202122168050.9U
Authority: CN
Inventors: 房希栋; 冯彦杰; 戴维莹
Original assignee: Shandong Fuerwo Agricultural Equipment Co Ltd
Current assignee: Shandong Fuerwo Agricultural Equipment Co Ltd
Priority date: 2021-09-08
Filing date: 2021-09-08
Publication date: 2022-01-11
Anticipated expiration: 2031-09-08

Abstract

The utility model discloses a gearbox assembly with a zone power gear shifting function for a tractor, and relates to the technical field of tractor transmission. The double-acting wet clutch type electric hydraulic crawling transmission device comprises a box body, an input shaft, a torque damper, a double-acting wet clutch, a planetary speed change mechanism, an auxiliary speed change mechanism, a crawling planetary speed reduction mechanism, a rear axle connecting shaft and an electric control hydraulic system, wherein the input shaft, the torque damper, the double-acting wet clutch, the planetary speed change mechanism, the auxiliary speed change mechanism, the crawling planetary speed reduction mechanism and the rear axle connecting shaft are sequentially installed in the box body, one end of the input shaft is connected with the torque damper, and the other end of the input shaft is coaxial with the double-acting wet clutch and is connected with the double-acting wet clutch through a key groove. This a gearbox assembly for district section power function of shifting gears adopts wet-type double-acting separation and reunion and electrohydraulic control, becomes convenient operation, the button formula that the comfort level is high with heavy manual labor and controls the scheme, alleviates driver's working strength and improves work efficiency.

Description

Gearbox assembly with section power gear shifting function for tractor

Technical Field

The utility model relates to the technical field of tractor transmission, in particular to a gearbox assembly with a section power gear shifting function for a tractor.

Background

At present, the mode of shifting of domestic tractor gearbox is mostly mechanical stepped gear, and the clutch that commonly uses is dry clutch, when the tractor need shift gears, need trample earlier the separation and reunion footboard, through operating system with dry clutch separation, cut off the power of engine transmission, the handle transform gear of shifting is operated again, because of clutch operating system ubiquitous manipulation power is big, the operating procedure is loaded down with trivial details, the driver frequently shifts the operation intensity that increases the driver for a long time, greatly reduced operating efficiency.

In the use process of the dry clutch, the working space is closed, the heat dissipation is not good, the service life is prolonged due to high temperature, and meanwhile, the friction plate of the dry clutch and the pressure plate of the clutch are in a friction state for a long time, the high temperature is easy to generate, and the friction plate burns and loses working capacity to be scrapped, so that the maintenance cost of the whole vehicle is increased.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model provides a gearbox assembly with a section power gear shifting function for a tractor, which has the advantages of simple structure, quick gear shifting, convenience in operation, low maintenance cost and long service life, and solves the problems in the background art.

(II) technical scheme

In order to achieve the purpose, the utility model provides the following technical scheme: a gearbox assembly for a section power gear shifting function of a tractor comprises a box body, an input shaft, a torque damper, a double-acting wet clutch, a planetary speed change mechanism, an auxiliary speed change mechanism, a crawling planetary speed reduction mechanism, a rear axle connecting shaft and an electric control hydraulic system, wherein the input shaft, the torque damper, the double-acting wet clutch, the planetary speed change mechanism, the auxiliary speed change mechanism, the crawling planetary speed reduction mechanism and the rear axle connecting shaft are sequentially arranged in the box body, one end of the input shaft is connected with the torque damper, the other end of the input shaft is coaxial with the double-acting wet clutch and connected through a key groove, the double-acting wet clutch is coaxially connected with the planetary speed change mechanism, the planetary speed change mechanism is coaxially connected with the auxiliary speed change mechanism, the auxiliary speed change mechanism is coaxially connected with the crawling planetary speed reduction mechanism, and the crawling planetary speed reduction mechanism is coaxially connected with the rear axle connecting shaft, the electric control hydraulic system is connected into the box body through a pipeline.

As a preferred technical scheme of the utility model, the box body is sequentially provided with a connecting cavity, a front cavity, a middle cavity and a rear cavity from left to right, and the cavities are separated by a partition plate.

As a preferred technical scheme of the utility model, the connecting cavity is of an open structure and is connected with a flywheel chamber of the engine, and the torque damper is positioned in the connecting cavity and is connected with the flywheel of the engine.

As a preferable technical solution of the present invention, the double-acting wet clutch is located in the front cavity, the planetary speed change mechanism is located in the middle cavity, and the auxiliary speed change mechanism and the creep planetary speed reduction mechanism are both located in the rear cavity.

As a preferred technical solution of the present invention, the double-acting wet clutch includes a clutch assembly a, a clutch assembly b, an output shaft a and an output shaft b, wherein one end of the output shaft a is coaxial with the clutch assembly a and is connected with the clutch assembly a by a key way, and one end of the output shaft b is coaxial with the clutch assembly b and is connected with the clutch assembly b by a key way.

As a preferable technical solution of the present invention, the planetary speed change mechanism includes a brake assembly a, a brake assembly b, a sun gear a, a planet gear a, a ring gear a and a planet carrier a, the sun gear a, the planet gear a and the ring gear a are sequentially mounted on the planet carrier a, and the ring gear a is respectively connected with the brake assembly a and the brake assembly b through external key slots thereof.

As a preferable technical solution of the present invention, the sub-transmission mechanism includes a sub-transmission driving shaft, a sub-transmission driven shaft, and an idler shaft, and the three shafts are arranged in parallel and are engaged with each other through a transmission gear.

As a preferable technical scheme of the present invention, the crawling planetary reduction mechanism includes a planet carrier b, a sun gear b, a planet gear b, and a gear ring b, and the sun gear b, the planet gear b, and the gear ring b are sequentially mounted on the planet carrier b.

As a preferred technical solution of the present invention, the electric control hydraulic system includes a gear pump, a fixed plate, a shunt valve block, a pressure regulating valve, a safety valve, and a connecting pipeline, wherein the shunt valve block, the pressure regulating valve, and the safety valve are sequentially mounted on the fixed plate and connected through a pipeline, the gear pump is connected with the shunt valve block through a pipeline, and the connecting pipeline is mounted on the shunt valve block.

(III) advantageous effects

Compared with the prior art, the utility model provides a gearbox assembly with a section power gear shifting function for a tractor, which has the following beneficial effects:

1. this a gearbox assembly for district section power function of shifting gears adopts wet-type double-acting separation and reunion and electrohydraulic control, becomes convenient operation, the button formula that the comfort level is high with heavy manual labor and controls the scheme, alleviates driver's working strength and improves work efficiency.

2. The gearbox assembly with the section power shifting function for the tractor adopts the combination of main gear power shifting and auxiliary gear meshing sleeve shifting, uses fewer electric control elements, realizes all gear shifting without stepping on a clutch, and thus obtains greater comfort with less cost increase.

3. The gearbox assembly with the section power gear shifting function for the tractor has the advantages that the main speed change is a planetary speed change mechanism, the structure is compact, the transmission ratio is large, the radial force is balanced, and the like.

4. According to the gearbox assembly with the section power gear shifting function for the tractor, when the wet clutches work, the electronic control hydraulic system can provide lubricating oil for forced lubrication, heat generated by friction of working parts is reduced, abrasion of the parts in work is improved, and the service life of the parts is prolonged.

Drawings

FIG. 1 is a schematic structural view of a transmission assembly for a range power shifting function of a tractor according to the present invention;

FIG. 2 is a block diagram of a transmission assembly for a range power shift function of a tractor in accordance with the present invention;

FIG. 3 is a structural view of a double acting wet clutch portion of a transmission assembly for a range power shift function of a tractor in accordance with the present invention;

FIG. 4 is a planetary variator portion of a transmission assembly for a range power shift function of a tractor in accordance with the present invention;

FIG. 5 is a partial configuration view of a subtransmission mechanism and a creeper planetary reduction mechanism of a transmission assembly for a range power shifting function of a tractor in accordance with the present invention;

fig. 6 is a structural diagram of an electro-hydraulic control system of a gearbox assembly for a range power shifting function of a tractor according to the present invention.

In the figure: 1. a box body; 2. an input shaft; 3. a torsional damper; 4. a double-acting wet clutch; 5. a planetary speed change mechanism; 6. an auxiliary transmission mechanism; 7. a crawling planetary reduction mechanism; 8. a rear axle shaft; 9. an electrically controlled hydraulic system; 10. a connecting cavity; 11. a front cavity; 12. a middle cavity; 13. a rear cavity; 14. a clutch assembly a; 15. a clutch assembly b; 16. an output shaft a; 17. an output shaft b; 18. a brake assembly a; 19. a brake assembly b; 20. a sun gear a; 21. a planet wheel a; 22. a gear ring a; 23. a planet carrier a; 24. an auxiliary transmission drive shaft; 25. an auxiliary speed change driven shaft; 26. an idler shaft; 27. a planet carrier b; 28. a sun gear b; 29. a planet wheel b; 30. a gear ring b; 31. a gear pump; 32. a fixing plate; 33. a diverter valve block; 34. a pressure regulating valve; 35. a safety valve; 36. and connecting the pipelines.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, a transmission assembly for a sector power shift function of a tractor includes a case 1, an input shaft 2, a torsional damper 3, a double-acting wet clutch 4, a planetary transmission mechanism 5, an auxiliary transmission mechanism 6, a crawling planetary reduction mechanism 7, a rear axle connecting shaft 8 and an electrically controlled hydraulic system 9, wherein the input shaft 2, the torsional damper 3, the double-acting wet clutch 4, the planetary transmission mechanism 5, the auxiliary transmission mechanism 6, the crawling planetary reduction mechanism 7 and the rear axle connecting shaft 8 are sequentially installed in the case 1, one end of the input shaft 2 is connected with the torsional damper 3, the other end is coaxial with the double-acting wet clutch 4 and connected with a key slot, main transmission is the planetary transmission mechanism 5, and the transmission assembly has the advantages of compact structure, large transmission ratio, balanced radial force and the like, and a multi-gear power output scheme can be realized through electro-hydraulic control, the double-acting wet clutch 4 is coaxially connected with the planetary speed change mechanism 5, the planetary speed change mechanism 5 is coaxially connected with the auxiliary speed change mechanism 6, main speed change power gear shifting and auxiliary speed change meshing sleeve gear shifting are combined, clutch stepping is not needed in all gear shifting, accordingly, great comfort is obtained with little cost increase, the auxiliary speed change mechanism 6 is coaxially connected with the crawling planetary speed reduction mechanism 7, the crawling planetary speed reduction mechanism 7 is coaxially connected with the rear axle shaft 8, the electric control hydraulic system 9 is connected into the box body 1 through a pipeline, wet double-acting clutch and electro-hydraulic control are adopted, manual labor is changed into a button type control scheme which is heavy in operation and high in comfort, the working intensity of a driver is reduced, the working efficiency is improved, the electric control hydraulic system 9 can provide lubricating oil forced lubrication, and heat generated by friction of working parts is reduced, the abrasion of parts in work is improved, and the service life of the parts is prolonged.

As a specific technical solution of this embodiment, the box body 1 is sequentially provided with a connecting cavity 10, a front cavity 11, a middle cavity 12 and a rear cavity 13 from left to right, and the cavities are separated by a partition plate.

In this embodiment, the gearbox is mainly used to change the transmission ratio, expand the variation range of the torque and the rotation speed of the driving wheel to adapt to the frequently changing driving conditions, and simultaneously enable the engine to work under the favorable working condition.

As a specific technical solution of this embodiment, the connection cavity 10 is an open structure and is connected to a flywheel chamber of the engine, and the torsional damper 3 is located in the connection cavity 10 and is connected to the flywheel of the engine.

In this embodiment, make the spatial layout of box 1 reasonable, convenient and other assembly.

As a specific solution of this embodiment, the double-acting wet clutch 4 is located in the front cavity 11, the planetary transmission mechanism 5 is located in the middle cavity 12, and the auxiliary transmission mechanism 6 and the creep planetary reduction mechanism 7 are both located in the rear cavity 13.

In this embodiment, the planetary transmission mechanism 5 has a power shift function, and the auxiliary transmission mechanism 6 has two gears, high and low speeds and a reverse gear.

As a specific solution of this embodiment, the double-acting wet clutch 4 includes a clutch assembly a14, a clutch assembly b15, an output shaft a16 and an output shaft b17, wherein one end of the output shaft a16 is coaxial with and splined to the clutch assembly a14, and one end of the output shaft b17 is coaxial with and splined to the clutch assembly b 15.

In this embodiment, one end of the double-acting wet clutch 4 is supported by the input shaft 2 and connected with it by a key way, the other end is fixed on the side wall of the front cavity 11 by a bearing and can rotate coaxially with the input shaft 2, one end of the output shaft a16 is connected with the clutch assembly a14 by a key way and the other end extends into the middle cavity 12, one end of the output shaft b17 is connected with the clutch assembly b15 by a key way and the other end extends into the middle cavity 12, the output shaft a16 is coaxial with the output shaft b 17.

As a specific solution of this embodiment, the planetary transmission mechanism 5 includes a brake assembly a18, a brake assembly b19, a sun gear a20, a planet gear a21, a ring gear a22 and a planet carrier a23, the sun gear a20, the planet gear a21 and the ring gear a22 are sequentially mounted on the planet carrier a23, and the ring gear a22 is respectively connected to the brake assembly a18 and the brake assembly b19 through external key slots thereof.

In this embodiment, one end of the planet carrier a23 close to the front cavity 11 is supported by a bearing, the other end is supported by the auxiliary speed change driving shaft 24 extending into the rear cavity 13 and connected with the key groove thereof, the planet gears a21 are distributed on the planet carrier a23 in three groups and can revolve along the axis thereof or can self-transmit, the sun gear a20 is arranged in the planet carrier a23, the internal spline thereof is connected with the output shaft b17 extending into the middle cavity 12, the circumferential gear is meshed with the planet gears a21, the sun gear a20 is arranged in the planet carrier a23, the internal spline thereof is connected with the output shaft a16 extending into the middle cavity 12, the circumferential gear is meshed with the planet gears a21, the external key groove of the gear ring a22 is respectively connected with the brake assembly a18 and the brake assembly b19, the internal gear is meshed with the planet gears a21, and the gear ring a22 can rotate along the axis of the planet carrier a 23.

As a specific technical solution of the present embodiment, the sub-transmission mechanism 6 includes a sub-transmission driving shaft 24, a sub-transmission driven shaft 25 and an idler shaft 26, and three shafts are arranged in parallel and meshed with each other through transmission gears.

In this embodiment, two ends of the auxiliary speed change driving shaft 24 are supported by bearings, one end of the auxiliary speed change driving shaft close to the planetary speed change mechanism 5 extends into the middle cavity 12 and is connected with the planet carrier a23 to transmit output power, a gear, a high gear meshing sleeve and a low gear meshing sleeve are sequentially assembled on the periphery of the auxiliary speed change driving shaft 24, two ends of the auxiliary speed change driven shaft 25 are supported by bearings, two ends of the idler shaft 26 are fixed on the side wall of the rear cavity 13, and the idler shaft is assembled with a gear which can rotate around the side wall.

As a specific technical solution of this embodiment, the crawling planetary reduction mechanism 7 includes a planet carrier b27, a sun gear b28, a planet gear b29, and a ring gear b30, and the sun gear b28, the planet gear b29, and the ring gear b30 are sequentially mounted on the planet carrier b 27.

In this embodiment, ring gear b30 is fixed on the lateral wall of rear cavity 13 with the bolt, planet wheel b29 divides three groups of equipartitions on planet carrier b27, install in ring gear b30, sun gear b28 sets up the one end that auxiliary transmission driven shaft 25 stretches out the cavity outside, the outside meshes with planet wheel b29, the connecting sleeve hole spline is connected with rear axle 8, can follow rear axle 8 axial displacement, connect the one end that auxiliary transmission driven shaft 25 stretches out the cavity, and the connecting sleeve outside is provided with the keyway that the tooth's socket is connected with planet wheel b29 setting after the tooth's socket can move.

As a specific technical solution of this embodiment, the electro-hydraulic control system 9 includes a gear pump 31, a fixing plate 32, a shunt valve block 33, a pressure regulating valve 34, a safety valve 35 and a connecting pipeline 36, the shunt valve block 33, the pressure regulating valve 34 and the safety valve 35 are sequentially mounted on the fixing plate 32 and connected through a pipeline, the gear pump 31 is connected with the shunt valve block 33 through a pipeline, and the connecting pipeline 36 is mounted on the shunt valve block 33.

In this embodiment, the electric control hydraulic system 9 can provide lubricating oil for forced lubrication, reduce heat generated by friction of working parts, improve wear of the working parts, and prolong the service life of the parts.

The working principle and the using process of the utility model are as follows: when the multi-gear power output device is used, wet-type double-acting clutch and electrohydraulic control are adopted, heavy physical labor is changed into a button type control scheme with convenient operation and high comfort level, the working intensity of a driver is reduced, the working efficiency is improved, when a plurality of wet-type clutches work, the electric control hydraulic system 9 can provide lubricating oil for forced lubrication, the heat generated by friction of working parts is reduced, the abrasion of the parts in work is improved, the service life of the parts is prolonged, the main speed change power gear shifting and the auxiliary speed change meshing sleeve gear shifting are combined, fewer electric control elements are used, the clutch is not needed to be stepped on all gear shifting, therefore, less cost is increased, greater comfort is obtained, the main speed change is the planetary speed change mechanism 5, the multi-gear power output scheme is realized through the electrohydraulic control, and the advantages of compact structure, large transmission ratio, balanced radial force and the like are achieved.

In conclusion, the gearbox assembly for the section power gear shifting function of the tractor adopts the wet double-acting clutch and the electro-hydraulic control, heavy physical labor is changed into a button type control scheme with convenient operation and high comfort, the working intensity of a driver is reduced, and the working efficiency is improved; the combination of main gear power gear shifting and auxiliary gear meshing sleeve gear shifting is adopted, and fewer electric control elements are used for realizing all gear shifting without stepping on a clutch, so that the great comfort is obtained with less cost increase; the main speed change is a planetary speed change mechanism 5, the structure is compact, the transmission ratio is large, the radial force is balanced, and the like; when a plurality of wet clutches work, the electric control hydraulic system 9 can provide lubricating oil for forced lubrication, heat generated by friction of working parts is reduced, abrasion of the working parts is improved, and service life of the parts is prolonged.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a gearbox assembly that is used for district's section power of tractor to shift function, includes box (1), input shaft (2), torsional damper (3), two effect wet clutch (4), planetary transmission mechanism (5), auxiliary transmission mechanism (6), crawl planet reduction gear (7), rear axle connecting axle (8) and automatically controlled hydraulic system (9), its characterized in that: the input shaft (2), the torque shock absorber (3), the double-acting wet clutch (4), the planetary speed change mechanism (5), the auxiliary speed change mechanism (6), the crawling planetary speed reduction mechanism (7) and the rear axle connecting shaft (8) are sequentially arranged in the box body (1), one end of the input shaft (2) is connected with the torque shock absorber (3), the other end is coaxial with the double-acting wet clutch (4) and is connected with the double-acting wet clutch by a key slot, the double-acting wet clutch (4) is coaxially connected with the planetary speed change mechanism (5), and the planetary speed change mechanism (5) is coaxially connected with the auxiliary speed change mechanism (6), the auxiliary speed change mechanism (6) is coaxially connected with the crawling planetary speed reduction mechanism (7), and the crawling planetary reduction mechanism (7) is coaxially connected with the rear axle connecting shaft (8), the electric control hydraulic system (9) is connected into the box body (1) through a pipeline.

2. A transmission assembly for a range power shift function of a tractor as defined in claim 1 wherein: the box body (1) is sequentially provided with a connecting cavity (10), a front cavity (11), a middle cavity (12) and a rear cavity (13) from left to right, and the cavities are separated by a partition plate.

3. A transmission assembly for a range power shift function of a tractor as defined in claim 2 wherein: the connecting cavity (10) is of an open structure and is connected with a flywheel chamber of the engine, and the torque damper (3) is located in the connecting cavity (10) and is connected with the flywheel of the engine.

4. A transmission assembly for a range power shift function of a tractor as defined in claim 2 wherein: the double-acting wet clutch (4) is located in a front cavity (11), the planetary speed change mechanism (5) is located in a middle cavity (12), and the auxiliary speed change mechanism (6) and the crawling planetary speed reduction mechanism (7) are both located in a rear cavity (13).

5. A transmission assembly for a range power shift function of a tractor as defined in claim 1 wherein: the double-acting wet clutch (4) comprises a clutch assembly a (14), a clutch assembly b (15), an output shaft a (16) and an output shaft b (17), wherein one end of the output shaft a (16) is coaxial with the clutch assembly a (14) and connected with the clutch assembly a through a key slot, and one end of the output shaft b (17) is coaxial with the clutch assembly b (15) and connected with the clutch assembly b through a key slot.

6. A transmission assembly for a range power shift function of a tractor as defined in claim 1 wherein: the planetary speed change mechanism (5) comprises a brake assembly a (18), a brake assembly b (19), a sun gear a (20), a planet gear a (21), a gear ring a (22) and a planet carrier a (23), wherein the sun gear a (20), the planet gear a (21) and the gear ring a (22) are sequentially mounted on the planet carrier a (23), and the gear ring a (22) is respectively connected with the brake assembly a (18) and the brake assembly b (19) through external key grooves of the gear ring a (22).

7. A transmission assembly for a range power shift function of a tractor as defined in claim 1 wherein: the auxiliary speed change mechanism (6) comprises an auxiliary speed change driving shaft (24), an auxiliary speed change driven shaft (25) and an idler shaft (26), wherein the three shafts are arranged in parallel and are meshed and connected with each other through transmission gears.

8. A transmission assembly for a range power shift function of a tractor as defined in claim 1 wherein: the crawling planetary reduction mechanism (7) comprises a planet carrier b (27), a sun wheel b (28), a planet wheel b (29) and a gear ring b (30), wherein the sun wheel b (28), the planet wheel b (29) and the gear ring b (30) are sequentially mounted on the planet carrier b (27).

9. A transmission assembly for a range power shift function of a tractor as defined in claim 1 wherein: the electric control hydraulic system (9) comprises a gear pump (31), a fixing plate (32), a shunt valve block (33), a pressure regulating valve (34), a safety valve (35) and a connecting pipeline (36), wherein the shunt valve block (33), the pressure regulating valve (34) and the safety valve (35) are sequentially mounted on the fixing plate (32) and connected through a pipeline, the gear pump (31) is connected with the shunt valve block (33) through the pipeline, and the connecting pipeline (36) is mounted on the shunt valve block (33).