CN220600357U - Variable speed transmission assembly of heavy tractor - Google Patents

Abstract

The utility model provides a speed change transmission assembly of heavy tractor, by mechanical reversing box, five gearboxes, crawl the case and constitute, three box is according to preceding, well, back in proper order with bolt fastening as a whole, mechanical reversing box includes preceding three gears and two gears of back level, five gearboxes include four keeps off main variable speed and four keeps off vice variable speed that space parallel arranged, crawl the case and include crawler, transfer case and PTO clutch, mechanical reversing box can exchange with the power gearbox, the two is selected to adorn one of them. The power gear shifting box is three-axis and the three axes are arranged in a triangle shape, so that power reversing and power high-low gear are realized. The utility model realizes the multifunctional selection of mechanical reversing, power shifting, crawling gear and the like by combining three independent modules, the PTO and the transfer case adopt electrohydraulic control, the five-shaft gearbox and the mechanical reversing case can realize 32 forward speeds and 32 reverse speeds by combining, and 64 forward speeds and 32 reverse speeds by combining with the power shifting case.

Description

Variable speed transmission assembly of heavy tractor

Technical Field

The utility model belongs to the field of tractors, and relates to a variable speed transmission assembly of a heavy tractor.

Background

At present, most of speed-changing transmission assemblies of heavy tractors in the prior art are mechanical, and a mechanical shuttle reversing device and a speed-changing transmission device are arranged in a transmission box body, so that a novel intelligent power shift electric control technology is not adopted. The transmission assembly with the structure has low transmission efficiency, the transmission box body has a complex structure and large occupied space, and the application of multi-working and intelligent new technology of the tractor is difficult to meet. Therefore, there is a need to provide a new solution to overcome the above-mentioned drawbacks.

Disclosure of Invention

The utility model aims to provide a variable speed transmission assembly of a heavy tractor, which can effectively solve the technical problems.

The utility model adopts the following technical scheme to realize the purposes: a variable speed drive assembly for a heavy tractor comprising: a mechanical reversing box, a five-shaft gearbox and a crawling gear box; the mechanical reversing box, the five-axis gearbox and the crawling gear box are sequentially fastened into a whole by bolts according to the sequence of front, middle and back; the mechanical reversing box comprises a reversing box body, wherein a reversing driving shaft, a reversing driven shaft, a reversing front-stage driving gear, a reversing idle gear, a reversing front-stage driven gear, a reversing rear-stage driving gear and a reversing rear-stage driven gear are arranged in the reversing box body, and the mechanical reversing box is arranged at the front part of the five-shaft gearbox; the five-axis gearbox comprises a gearbox body, wherein the gearbox body is internally divided into a main speed change and a secondary speed change, the main speed change consists of a first axis, a second axis and four pairs of main speed change gears, the secondary speed change consists of three axes, four axes and four pairs of secondary speed change gears, the main speed change and the secondary speed change are arranged in parallel, and a main speed change output gear and a secondary speed change high-speed drive gear are in constant meshed transmission; the crawling gear box comprises a crawling box body, the crawling box body is divided into a crawling device, a transfer case and a PTO clutch, the crawling device is composed of two pairs of gears, the transfer case is composed of a pair of gears, five shafts and the transfer case clutch, the transfer case is arranged at the rear lower part of the crawling device, the PTO clutch is arranged at the upper part of the crawling box body, and the crawling gear box is arranged at the rear part of the five shafts gearbox.

The mechanical reversing box can be replaced by a power shift box, i.e. one of the two is selected.

The power gear shifting box comprises a power gear shifting box body, a high gear shaft, a low gear shaft, a reverse gear shaft, a high gear clutch, a low gear clutch, a reverse gear clutch, a front three gears and a rear three gears, wherein the high gear shaft, the low gear shaft and the reverse gear shaft are arranged in a triangular shape, and the power gear shifting box is arranged at the front part of the five-shaft gearbox.

The first shaft, the second shaft, the third shaft, the fourth shaft and the fifth shaft of the five-shaft gearbox are arranged in parallel in the space in the gearbox body, the first shaft, the fourth shaft and the fifth shaft are positioned on the same longitudinal center plane, the second shaft is positioned on the left side of the longitudinal center plane, and the third shaft is positioned on the right side of the longitudinal center plane.

The following beneficial effects can be achieved by adopting the scheme of the utility model: 1. the three independent module combinations are adopted, the variable speed transmission total components are divided into three sections of boxes, so that the selection of multiple functions such as mechanical reversing, power shifting, crawling gear and the like is facilitated, and the product has a common basic type and can be selectively provided with high-end perfection, so that the requirements of users at different levels are met; 2. the power gear shifting box comprises power high-low gear and power reversing, electric-hydraulic intelligent control is adopted for realizing forward high-low gear and reverse gear, power is not cut off during gear shifting, and production efficiency is improved; 3. the five-axis gearbox has 32 gears, can realize 32 forward speeds and 32 reverse speeds by combining with a mechanical reversing box, can realize 64 forward speeds and 32 reverse speeds by combining with a power gear shifting box, has multiple gear shifting gears and meets various operation requirements.

Drawings

FIG. 1 is a schematic illustration of the construction of a heavy tractor variable speed drive assembly with a mechanical reversing box of the present utility model;

FIG. 2 is a schematic illustration of the construction of a heavy tractor variable speed drive assembly with a power shift box of the present utility model;

FIG. 3 is a schematic illustration of the axle positions of a five-axis gearbox of a variable speed drive assembly for a heavy tractor according to the present utility model.

In the figure: 1. a main clutch, 2, a reversing box body, 3, a reversing driving shaft, 4, a reversing driven shaft, 5, a reverse front stage driving gear, 6, a reverse idle gear, 7, a reverse front stage driven gear, 8, a reverse rear stage driving gear, 9, a reverse rear stage driven gear, 10, a spline housing, 11, a gearbox body, 12, a crawling box body, 13, a first shaft, 14, a second shaft, 15, a three shaft, 16, a fourth shaft, 17, a five shaft, 18, a power output front shaft, 19, a crawler shaft, 20, a main speed change output gear, 21, a secondary speed change high stage driving gear, 22, a PTO clutch, 23, a transfer box clutch, 24, a rear axle spline coupling, 25, a PTO spline coupling, 26, a front axle spline coupling, 27, a buffer disc, 28, a power shift box body, 29, a high gear shaft, 30, a low gear shaft, 31, a reverse gear shaft, 32, a high gear clutch, 33, a low gear clutch, 34, a reverse gear clutch; A. mechanical reversing box, B, five-axis gearbox, C, crawling gear box, D, power gear box, E, main speed change, F, auxiliary speed change, G, crawling device, H and transfer case.

Detailed Description

The utility model is further described below with reference to the accompanying drawings. As shown in figure 1, the variable speed transmission assembly of the heavy tractor consists of three box bodies, namely a mechanical reversing box A, a five-shaft gearbox B and a crawling gear box C, which are sequentially fastened into a whole by bolts according to the front, middle and rear directions. The mechanical reversing box A is connected with a shaft 13 of the five-shaft gearbox B through a spline sleeve 10, a four-shaft 16 of the five-shaft gearbox B is connected with a crawler gear, a crawler shaft 19 is connected with a pair of gears of the transfer case H through a spline, and a PTO clutch 22 is connected with a power output front shaft 18 through a spline.

The mechanical reversing box A comprises a reversing box body 2, a reversing driving shaft 3, a reversing driven shaft 4, a reversing front-stage driving gear 5, a reversing idle gear 6, a reversing front-stage driven gear 7, a reversing rear-stage driving gear 8, a reversing rear-stage driven gear 9 and a reversing synchronizer, so that forward and reverse gear conversion is realized; the reverse front stage driving gear 5, the reverse idle gear 6 and the reverse front stage driven gear 7 are arranged in a meshed mode, the reverse rear stage driving gear 8 and the reverse rear stage driven gear 9 are arranged in a meshed mode, and the front end of the reversing driving shaft 3 is connected with the main clutch 1.

The five-axis gearbox B comprises a gearbox body 11, a main speed change E and an auxiliary speed change F are arranged in the gearbox body 11, the main speed change E comprises a first shaft 13, a second shaft 14, four pairs of main speed change gears and two synchronizers, the two synchronizers are arranged on the second shaft 14 to realize four main speed change gears, the auxiliary speed change F comprises a triaxial 15, a tetrashaft 16, four pairs of auxiliary speed change gears and two synchronizers, the two synchronizers are arranged on the tetrashaft 16 to realize four auxiliary speed change gears, the main speed change E and the auxiliary speed change F are arranged in parallel, and the main speed change E and the auxiliary speed change F are driven by a main speed change output gear 20 and an auxiliary speed change high speed change driving gear 21.

The crawling gear box C comprises a crawling box body 12, a crawling device G, a transfer case H and a PTO clutch 22 are arranged in the crawling box body 12, the crawling device G is composed of two pairs of gears and a meshing sleeve to realize two gear positions of high gear or low gear, the rear end of an output shaft 19 of the crawling device is connected with a rear axle spline coupling 24, the transfer case H is composed of a pair of gears, a five shaft 17 and a transfer case clutch 23, the front end of the five shaft 17 is connected with a front axle spline coupling 26, and the rear end of the PTO clutch 22 is connected with a PTO spline coupling 25.

As shown in fig. 2, the mechanical reversing box a can be replaced with a power shift box D, i.e., either of them is selectively installed. The power shift box D comprises a power shift box body 28, a high gear shaft 29, a low gear 30, a reverse gear shaft 31, a high gear clutch 32, a low gear clutch 33, a reverse gear clutch 34, a front three gears and a rear three gears, wherein the high gear shaft 29, the low gear shaft 30 and the reverse gear shaft 31 are arranged in a triangle, and the front end of the high gear shaft 29 is connected with a buffer disc 27.

As shown in fig. 3, the first shaft 13, the second shaft 14, the third shaft 15, the fourth shaft 16 and the fifth shaft 17 of the five-shaft gearbox B are spatially arranged in parallel in the gearbox body 11, and the first shaft 13, the fourth shaft 16 and the fifth shaft 17 are located in a longitudinal center plane of the transmission assembly, the second shaft 14 is located at the left side of the longitudinal center plane, and the third shaft 15 is located at the right side of the longitudinal center plane.

The engine power is input into a mechanical reversing box A through a main clutch 1, is transmitted into a five-shaft gearbox B after forward or reverse gear selection, is transmitted into a secondary speed change F through a main speed change output gear 20 and a secondary speed change high-speed drive gear 21 after four gear selections of 1, 2, 3 and 4 of the primary speed change E, is transmitted into a crawling gear box C again for crawling up gear selection or crawling down gear selection, and is output to a rear axle through a rear axle spline coupling 24 of a crawler output shaft 19, so that 32 forward speeds and 32 reversing speeds can be realized.

Meanwhile, the power on the output shaft 19 of the crawler passes through a pair of gears of the transfer case H and a transfer case clutch 23, and is output to a front axle by a front axle spline coupling 26 at the front end of the five shafts 17; the engine power is output to the rear power output shaft through the power output front shaft 18 and then is output to the rear power output shaft through the spline coupling 25 at the rear end of the PTO clutch 22 to drive the agricultural machinery.

When the power shift box D is selected, engine power is input into the power shift box D through the buffer disk 27, and is transmitted into the five-shaft gearbox B after three power gears of forward high gear, forward low gear or reverse are selected, so that 64 forward speeds and 32 reverse speeds can be realized.

The present utility model is not limited to the embodiments described in the foregoing, but all technical solutions and modifications that do not depart from the gist of the utility model are intended to fall within the scope of the utility model as defined in the claims.

Claims (4)

1. A variable speed drive assembly for a heavy tractor comprising: a mechanical reversing box (A), a five-shaft gearbox (B) and a crawling gear box (C); the mechanical reversing box (A), the five-axis gearbox (B) and the crawling gear box (C) are sequentially fastened into a whole by bolts according to the sequence of front, middle and rear; the mechanical reversing box (A) comprises a reversing box body (2), a reversing driving shaft (3), a reversing driven shaft (4), a reversing front-stage driving gear (5), a reversing idler gear (6), a reversing front-stage driven gear (7), a reversing rear-stage driving gear (8) and a reversing rear-stage driven gear (9) are arranged in the reversing box body (2), and the mechanical reversing box (A) is arranged at the front part of the five-shaft gearbox (B); the five-axis gearbox (B) comprises a gearbox body (11), a main speed change (E) and a secondary speed change (F) are arranged in the gearbox body (11), the main speed change (E) consists of a first shaft (13), a second shaft (14) and four pairs of main speed change gears, the secondary speed change (F) consists of three shafts (15), four shafts (16) and four pairs of secondary speed change gears, the main speed change (E) and the secondary speed change (F) are arranged in parallel, and a main speed change output gear (20) and a secondary speed change high speed driving gear (21) are in constant mesh transmission; the crawling gear box (C) comprises a crawling box body (12), a crawling device (G), a transfer case (H) and a PTO clutch (22) are arranged in the crawling box body (12), the crawling device (G) is composed of two pairs of gears, the transfer case (H) is composed of a pair of gears, a five-shaft (17) and a transfer case clutch (23), the transfer case (H) is arranged at the rear lower part of the crawling device (G), the PTO clutch (22) is arranged at the upper part of the crawling box body (12), and the crawling gear box (C) is arranged at the rear part of the five-shaft gearbox (B).

2. The variable speed drive assembly of a heavy tractor as defined by claim 1 wherein: the mechanical reversing box (A) can be replaced by a power gear shifting box (D), namely one of the two boxes is selected.

3. The variable speed drive assembly of a heavy tractor as defined by claim 1 wherein: the power gear shifting box (D) comprises a power gear shifting box body (28), a high gear shaft (29), a low gear shaft (30), a reverse gear shaft (31), a high gear clutch (32), a low gear clutch (33), a reverse gear clutch (34) and three gears in the front and three gears in the rear, wherein the high gear shaft (29), the low gear shaft (30) and the reverse gear shaft (31) are arranged in a triangular shape, and the power gear shifting box (D) is arranged at the front part of the five-shaft gearbox (B).

4. The variable speed drive assembly of a heavy tractor as defined by claim 1 wherein: the first shaft (13), the second shaft (14), the third shaft (15), the fourth shaft (16) and the fifth shaft (17) of the five-shaft gearbox (B) are arranged in parallel in space in the gearbox body (11), the first shaft (13), the fourth shaft (16) and the fifth shaft (17) are positioned on the same longitudinal center plane, the second shaft (14) is positioned on the left side of the longitudinal center plane, and the third shaft (15) is positioned on the right side of the longitudinal center plane.