CN108533696B - Multi-cylinder small crawler tractor gearbox - Google Patents
Multi-cylinder small crawler tractor gearbox Download PDFInfo
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- CN108533696B CN108533696B CN201810685196.0A CN201810685196A CN108533696B CN 108533696 B CN108533696 B CN 108533696B CN 201810685196 A CN201810685196 A CN 201810685196A CN 108533696 B CN108533696 B CN 108533696B
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- 229910000831 Steel Inorganic materials 0.000 claims description 6
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- 238000005520 cutting process Methods 0.000 description 2
- 238000003971 tillage Methods 0.000 description 2
- 238000012271 agricultural production Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of agricultural machinery, and particularly relates to a multi-cylinder small-sized crawler tractor gearbox, which comprises an engine clutch unit, a gearbox body unit, a driving box body unit, a gearbox upper cover unit, a steering brake assembly and a power output shaft.
Description
Technical Field
The invention belongs to the technical field of agricultural machinery, and particularly relates to a multi-cylinder small crawler tractor gearbox.
Background
With the modern agricultural construction of China entering a new stage, the agricultural production mode is changed from a new stage mainly comprising human and animal power to a new stage mainly comprising mechanized operation for thousands of years, the cultivation and collection of agricultural crops in China are achieved by more than 80% in the mechanized part province, but the agricultural mechanization degree of orchards, greenhouses and hillside fields is lower, and with the increasing prominence of the problems of difficult and expensive labor, the development of agricultural machinery operation has become a necessary trend.
At present, large-scale wheeled agricultural machinery in the market is large because of the size of a single machine, factors such as machine body length of three-point suspension of machines are limited, and can not meet the requirements of pipe cultivation, and a crawler tractor with small size and large horsepower is urgently needed for ditching and fertilizing in an orchard, deep cultivation and fine management of the greenhouse, cultivation of hillside fields and the like. Therefore, a small multi-cylinder crawler tractor needs to be designed, but the core problem of the small multi-cylinder crawler tractor is that the small multi-cylinder crawler tractor needs to be matched with a gearbox suitable for miniaturization, the volume of the gearbox of the existing multi-cylinder crawler tractor is too large, the speed of the gearbox is not matched with that of the existing multi-cylinder crawler tractor, and the small multi-cylinder crawler tractor cannot be used, so that a gearbox matched with a small multi-cylinder diesel engine is urgently needed.
Disclosure of Invention
The invention provides a multi-cylinder small crawler tractor gearbox, which aims to solve the problem of large volume of an agricultural crawler tractor, has the advantages of small volume, multiple gears and reasonable speed matching, is suitable for tilling pipes of orchards, greenhouses and hilly and sloping fields, and can be used in crawler tractors for tilling in the orchards and the greenhouses.
Another object of the invention is to provide a gearbox for use in an agricultural crawler tractor which is convenient to operate, convenient and reliable to use, and suitable for being matched with various small multi-cylinder crawler tractors.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
The utility model provides a small-size caterpillar tractor gearbox of multi-cylinder, includes engine clutch unit, gearbox body unit, drive box body unit, gearbox upper cover unit, turns to brake assembly, power take off shaft, the front of gearbox body unit passes through engine clutch unit and engine fixed connection, and the upper portion fixedly connected with gearbox upper cover unit of gearbox body unit, the rear fixedly connected with drive box body unit of gearbox body unit, the lower part of drive box body unit in install turn to brake assembly, and the right rotation of drive box body unit is connected with a power take off shaft.
The gear box body unit comprises a gear box body, the engine clutch unit comprises a clutch power input gear shaft and a separation sleeve, the clutch power input gear shaft is movably arranged at the middle lower part of the gear box body, the spline part at the front side of the clutch power input gear shaft is sleeved with the clutch, the clutch is arranged on an engine flywheel, the separation sleeve is sleeved at the middle of the clutch power input gear shaft, and a clutch separation bearing is fixedly arranged on the separation sleeve; a needle bearing and a bevel gear shaft are rotatably arranged in the middle of a gear part of the clutch power input gear shaft, and a high-low speed duplex gear is fixedly arranged on the bevel gear shaft; .
A main shaft is rotatably arranged at the upper right of the clutch power input gear shaft, a main shaft duplex gear is fixedly arranged on the main shaft, and a large gear of the main shaft duplex gear is always meshed with a gear of the clutch power input gear shaft; the main shaft middle position is movably provided with a 2-3 gear sliding gear, the middle upper position of the gearbox body is fixedly provided with a 2-3 gear shifting fork shaft, the 2-3 gear shifting fork is movably arranged on the 2-3 gear shifting fork shaft, and the head part of the 2-3 gear shifting fork is arranged in a shifting fork groove at the middle position of the 2-3 gear sliding gear.
The clutch power input gear shaft is characterized in that a two-shaft is rotatably arranged at the upper left side of the clutch power input gear shaft, a two-shaft duplex gear is fixedly arranged in the middle of the two-shaft, a reverse gear sliding gear is movably arranged on one side of the two-shaft close to the clutch power input gear shaft, a high-low speed sliding gear is movably arranged on the other side of the two-shaft, a reverse gear high-low speed shifting fork shaft is fixedly arranged at the upper part of the two-shaft, a reverse gear shifting fork and a high-low speed shifting fork are movably arranged on the reverse gear high-low speed shifting fork shaft, shifting fork grooves are formed in the middle positions of the reverse gear shifting fork and the high-low speed shifting fork, springs and steel balls are used for limiting the reverse gear shifting fork, the head of the reverse gear shifting fork is arranged in the shifting fork groove of the reverse gear sliding gear, and the head of the high-low speed shifting fork is arranged in the shifting fork groove of the high-low speed sliding gear.
The driving box body unit comprises a power output shifting fork shaft, a power output sliding gear, a power output shifting fork, a steering brake assembly, a power output gear shaft and a driving box body, wherein the steering brake assembly is arranged at the middle position of the driving box body, the power output gear shaft is arranged on the upper portion of the main shaft, the other end of the power output gear shaft is arranged at the middle position of the driving box body, the power output sliding gear is movably arranged at the middle position of the power output gear shaft, a shifting fork groove is formed in the middle position of the power output sliding gear, the power output shifting fork shaft is fixedly arranged at the upper portion of the transmission box body, the power output shifting fork is movably arranged on the power output shifting fork shaft, a spring for the power output shifting fork is limited by a steel ball, and the head of the power output shifting fork is arranged in the shifting fork groove of the power output sliding gear.
The upper cover unit of the gearbox comprises an upper cover of the gearbox, a control platform, a gear speed change control handle, a clutch control handle, a high-low speed control handle, an auxiliary shifting fork, a gear control shaft, a high-low speed control shaft and a clutch control shaft, wherein the upper cover of the gearbox is fixedly arranged at the upper part of a gearbox body, the control platform is fixedly arranged on the upper cover of the gearbox, the control platform extends to deviate to the left, the clutch control shaft is movably arranged at the lower position of the control platform, the clutch control handle is fixedly arranged on the clutch control shaft, the gear control shaft is movably arranged at the upper part of the upper cover of the gearbox, the gear speed change control handle and the auxiliary shifting fork are fixedly arranged on the gear control shaft, and when the auxiliary shifting fork moves left and right, the head part of the auxiliary shifting fork is inserted into a shifting fork groove of a reverse gear shifting fork or 2-3 shifting forks; the high-low speed control shaft is movably arranged at the rear position of the upper cover of the gearbox, the high-low speed control handle and the auxiliary shifting fork are fixedly arranged on the high-low speed control shaft, and the head part of the auxiliary shifting fork is inserted into the shifting fork groove of the high-low speed shifting fork.
The power separation control shaft seat is fixedly arranged on the driving box body, the power separation control shaft seat is sleeved with a power separation control shaft, a power separation control handle and an auxiliary shifting fork are respectively and fixedly arranged on the power separation control shaft, the head of the auxiliary shifting fork is inserted into a shifting fork groove of the power output shifting fork, a power output shaft is movably arranged at the rear part of the driving box body, one end of the power output shaft extends out of the box body of the driving box body, a power output bevel gear is fixedly arranged in the middle of the power output shaft, and the power output bevel gear is constantly meshed with a bevel gear on a power output gear shaft.
The driving box is characterized in that two sides of the rear lower portion of the driving box body are respectively provided with a driving shaft tube, the driving shaft tubes on the two sides are respectively and rotatably provided with a driving shaft, one side of each driving shaft is fixedly provided with a driving large gear, the other side of each driving shaft is fixedly provided with a driving chain wheel, the driving chain wheels drive the crawler belt to walk, and the driving large gears and the driving chain wheels are symmetrically arranged on the two sides of the driving box body.
The steering brake assembly comprises a brake rocker arm, a brake rocker arm shaft, a brake fixing seat, a brake drum, a differential mechanism mounting seat, small reduction gears, big bevel gears, a differential mechanism assembly, a reduction shaft and brake shoes.
The gearbox totally comprises 8 gears, wherein the gears comprise 6 forward gears and 2 reverse gears, and the speed ratio of the 6 forward gears is as follows: i gear 1: 111.17; gear II 1: 71.49; III gear 1: 54.16; IV gear 1:35.1; v gear 1:22.54; gear VI 1:14.86; the speed ratio of the reverse I gear is 1: 54.16; the speed ratio of the reverse II gear is 1:17.1; the power take off ratio is 1:5.168.
The beneficial effects of the invention are as follows:
1. because the gearbox body unit is fixedly connected with the engine through the engine clutch unit, the power of the engine is directly input into the gearbox body unit, and a common belt connection mode is not used, so that the power utilization efficiency of the engine is improved.
2. The right side of the driving box body unit is movably connected with a power output shaft, the power output shaft is in power connection with the rear hanging tool of the crawler tractor on the right side of the driving box body, the mode of hanging the rear hanging tool in three points and outputting the rear hanging tool in the common mode of a tractor is not used, the connection distance between the driving box body and the rear hanging tool of the crawler tractor is shortened, the whole length of the crawler tractor is further shortened, and cultivation in narrow spaces such as an orchard and a greenhouse is facilitated.
3. Because the main shaft, the two shafts, the clutch power input gear shaft and the bevel gear shaft are used, the main shaft, the two shafts and the bevel gear shaft are distributed in a triangular mode in space, and a plurality of duplex gears are used on the shafts, the invention has the advantages of multiple gears and small volume.
4. Because the differential mechanism assembly is used in the steering brake assembly, the differential mechanism assembly separates power driving at two sides, so that the steering device has the advantage of steering without cutting off power, and is convenient to operate and use.
Drawings
FIG. 1 is a schematic top view of the overall present invention;
FIG. 2 is a schematic horizontal cross-sectional view of an assembled structure of the transmission unit, the drive unit of the present invention;
FIG. 3 is a schematic horizontal cross-sectional view of the differential assembly of the drive unit of the present invention;
FIG. 4 is a schematic rear view of the transmission cover unit of the present invention;
FIG. 5 is a schematic top view of the gear, high and low speed, clutching control structure of the present invention;
FIG. 6 is a schematic rear cut-away view of the power split control handle of the present invention
In the figure: D. an engine clutch unit; 16. a clutch power input gear shaft; 17. a clutch release bearing; 18. a separation sleeve;
A. A transmission housing unit; 1. a transmission housing; 2. a main shaft duplex gear; 3. 2-3 shift fork shaft; 4. a 2-3 shift fork; 5. a main shaft; 6. 2-3 gear sliding gear; 7. high-low speed duplicate gear; 19. a bevel gear shaft; 20. a two-axis; 21. a reverse sliding gear; 22. a two-shaft duplex gear; 23. reverse gear high-low speed shifting fork shaft; 24. a reverse shift fork; 25. a high-low speed shifting fork; 26. a high-low speed sliding gear;
B. A drive housing unit; 8. a power pinion reduction gear; 9. a power take-off shift rail; 10. a power output sliding gear; 11. a power take-off fork; 12. a steering brake assembly; 12-1, a brake rocker arm; 12-2, a brake rocker shaft; 12-3, a brake fixing seat; 12-4, a brake drum; 12-5, a differential mounting seat; 12-6, small reduction gears; 12-7, big bevel gears; 12-8, a differential assembly; 12-9, a speed reducing shaft; 12-10 parts of brake shoe; 13. a power output gear shaft; 14. a power output shaft; 15. driving the box body; 27. a power output bevel gear; 28. a driving gearwheel; 29. a driving shaft tube; 30. a drive shaft; 31. a drive sprocket; 38. a power separation control handle; 39. an auxiliary shifting fork; 44. a power separation control shaft; 45. a power separation control shaft seat; 46. a control platform;
C. A transmission upper cover unit; 34. a gearbox upper cover; 32. a clutch shift rail; 33. a clutch adjusting pull rod; 35. a gear shift control handle; 36. a clutch lever; 37. a high-low speed operating handle; 40. a gear control shaft; 41. a high-low speed control shaft; 42. a clutch control shaft; 43. the clutch controls the rocker arm.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example 1:
in order to solve the problem of large volume of the agricultural crawler tractor, a gearbox which has small volume, multiple gears and reasonable speed matching and is suitable for tillage pipes of orchards, greenhouses and hilly and sloping fields and can be used in the crawler tractor for tillage in the orchards and the greenhouses is provided; in order to provide a gearbox used in an agricultural crawler tractor with convenient operation, an operator stands on the left side of the tractor to operate, the tractor is convenient and reliable to use, and is suitable for being matched with various small multi-cylinder crawler tractors.
The engine clutch unit D is characterized in that the size is shortened and reduced, the front side of the gearbox body unit A is fixedly connected with an engine through the engine clutch unit D, power of the engine is directly input into the gearbox body unit A, the gear change is carried out through the gearbox body unit A to adjust the speed ratio, the gearbox upper cover unit C is fixedly connected to the left side of the top of the gearbox body unit A, the gear change is carried out through the gearbox body unit A by an operating handle of the gearbox upper cover unit C to adjust the speed ratio, then the gearbox body unit A inputs power into the driving box body unit B, a part of power is driven by the steering brake assembly 12 to be connected with tracks on the left side and the right side to complete walking, and the other part of power is output to a rear hanging machine of the crawler tractor by a power output shaft 14 on the right side of the driving box body unit B to carry out cultivation.
Because the gearbox body unit D is fixedly connected with the engine through the engine clutch unit A, the power of the engine is directly input into the gearbox body unit A, and a common belt connection mode is not used, so that the power utilization efficiency of the engine is improved.
Because the right side of the driving box body unit B is movably connected with a power output shaft 14, the power output shaft 14 is in power connection with the rear hanging machine of the crawler tractor on the right side of the driving box body unit B, and the mode that the rear hanging machine of the crawler tractor is connected with the rear side of the crawler tractor is not used, the connection distance between the driving box body unit B and the rear hanging machine of the crawler tractor is shortened, the whole machine length of the crawler tractor is further shortened, and the crawler tractor is favorable for cultivation in narrow spaces such as orchards and greenhouses
Example 2:
On the basis of embodiment 1, as shown in fig. 2, the gearbox body unit a comprises a gearbox body 1, the engine clutch unit D comprises a clutch power input gear shaft 16 and a release sleeve 18, the clutch power input gear shaft 16 is movably arranged at the middle lower part of the gearbox body 1, a spline part at the front side of the clutch power input gear shaft 16 is sleeved with a clutch, the clutch is arranged on an engine flywheel, the middle of the clutch power input gear shaft 16 is sleeved with the release sleeve 18, and a clutch release bearing 17 is fixedly arranged on the release sleeve 18; a needle bearing and a bevel gear shaft 19 are rotatably arranged in the middle of the gear part of the clutch power input gear shaft 16, and a high-low speed duplex gear 7 is fixedly arranged on the bevel gear shaft 19; .
A main shaft 5 is rotatably arranged at the upper right of the clutch power input gear shaft 16, a main shaft duplex gear 2 is fixedly arranged on the main shaft 5, and a large gear of the main shaft duplex gear 2 is always meshed with a gear of the clutch power input gear shaft 16; the middle position of the main shaft 5 is movably provided with a 2-3 shift sliding gear 6, a 2-3 shift fork shaft 3 is fixedly arranged at the middle upper position of the gearbox body 1, a 2-3 shift fork 4 is movably arranged on the 2-3 shift fork shaft 3, and the head of the 2-3 shift fork 4 is arranged in a shift fork groove at the middle position of the 2-3 shift sliding gear 6.
The clutch power input gear shaft 16 is rotatably provided with a two-shaft 20 at the upper left, a two-shaft duplex gear 22 is fixedly arranged in the middle of the two-shaft 20, one side of the two-shaft 20, which is close to the gear of the clutch power input gear shaft 16, is movably provided with a reverse gear sliding gear 21, the other side of the two-shaft 20 is movably provided with a high-low speed sliding gear 26, the upper part of the two-shaft 20 is fixedly provided with a reverse gear high-low speed fork shaft 23, the reverse gear high-low speed fork shaft 23 is movably provided with a reverse gear fork 24 and a high-low speed fork 25, the middle positions of the reverse gear fork 24 and the high-low speed fork 25 are respectively provided with a fork groove, the reverse gear 24 and the high-low speed fork 25 are limited by a spring and a steel ball, the head of the reverse gear fork 24 is arranged in the fork groove of the reverse gear sliding gear 21, and the head of the high-low speed fork 25 is arranged in the fork groove of the high-low speed sliding gear 26.
The driving box body unit B comprises a power output shifting fork shaft 9, a power output sliding gear 10, a power output shifting fork 11, a steering brake assembly 12, a power output gear shaft 13 and a driving box body 15, wherein the steering brake assembly 12 is arranged at the middle position of the driving box body 15, the power output gear shaft 13 is arranged at the upper part of the main shaft 5, the other end of the power output gear shaft 13 is arranged at the middle position of the driving box body 15, the power output sliding gear 10 is movably arranged at the middle position of the power output gear shaft 13, a shifting fork groove is formed in the middle position of the power output sliding gear 10, the power output shifting fork shaft 9 is fixedly arranged at the upper part of the gearbox body 1, the power output shifting fork 11 is movably arranged on the power output shifting fork shaft 9, the power output shifting fork 11 is limited by a spring and a steel ball, and the head part of the power output shifting fork 11 is arranged in the shifting fork groove of the power output sliding gear 10.
Referring to fig. 4 and 5, the transmission upper cover unit C includes a transmission upper cover 34, a control platform 46, a gear shift control handle 35, a clutch control handle 36, a high-low speed control handle 37, a secondary fork 39, a gear control shaft 40, a high-low speed control shaft 41, and a clutch control shaft 42, wherein the transmission upper cover 34 is fixedly mounted on the upper portion of the transmission body 1, the control platform 46 is fixedly mounted on the transmission upper cover 34, the control platform 46 extends to the left, the clutch control shaft 42 is movably mounted at a position below the control platform 46, the clutch control handle 36 is fixedly mounted on the clutch control shaft 42, the gear control shaft 40 is movably mounted at the upper portion of the transmission upper cover, the gear shift control handle 35 and the secondary fork 39 are fixedly mounted on the gear control shaft 40, and when the secondary fork 39 moves left and right, the head is inserted into a shift fork groove of a reverse gear 24 or 2-3 gear 4; a high-low speed control shaft 41 is movably mounted at the rear position of the upper cover 34 of the gearbox, a high-low speed control handle 37 and an auxiliary shifting fork 39 are fixedly mounted on the high-low speed control shaft 41, and the head of the auxiliary shifting fork 39 is inserted into a shifting fork groove of the high-low speed shifting fork 25.
Referring to fig. 6, the driving box 15 is fixedly provided with a power separation control shaft seat 45, the power separation control shaft seat 45 is sleeved with a power separation control shaft 44, the power separation control shaft 44 is fixedly provided with a power separation control handle 38 and an auxiliary shifting fork 39 respectively, the head of the auxiliary shifting fork 39 is inserted into a shifting fork groove of the power output shifting fork 11, the rear part of the driving box 15 is movably provided with a power output shaft 14, one end of the power output shaft 14 extends out of the box body of the driving box 15, the middle position of the power output shaft 14 is fixedly provided with a power output bevel gear 27, and the power output bevel gear 27 is in constant mesh with a bevel gear on the power output gear shaft 13.
When the gear is engaged with the gear 1, the clutch control handle 36 is pulled to the separation position to separate the power of the engine, then the gear speed change control handle 35 is pulled to the gear 1, when the gear 1 is engaged, the gear speed change control handle 35 is moved forward to the gear 1 to enable a reverse gear sliding gear 21 to be meshed with the pinion gear of the main shaft duplex gear 2, and when the gear is engaged, the gear speed change control handle 35 is moved backward to the reverse position to enable a reverse gear sliding gear 21 to be meshed with the gear of the clutch power input gear shaft 16.
When 2-3 gears are hung, the clutch operating handle 36 is pulled to a separation position to drive the clutch control shaft 42 to rotate, the clutch control rocker arm 43 and the clutch adjusting pull rod 33 are driven, the clutch shifting fork shaft 32 shifts the separation sleeve 18 and the clutch separation bearing 17 to separate engine power, then the gear speed changing operating handle 35 is shifted to a 2-3 gear position, when 2 gears are hung, the gear speed changing operating handle 35 is shifted forwards, the gear control shaft 40 and the auxiliary shifting fork 39 are driven, the 2-3 shifting fork 4 is shifted, the 2-3 gears sliding gear 6 is driven, the pinion of the 2-3 gears sliding gear 6 is meshed with the big gear of the two-shaft duplex gear 22, and when 3 gears are hung, the gear speed changing operating handle 35 is shifted backwards, so that the big gear of the 2-3 gears sliding gear 6 is meshed with the pinion of the two-shaft duplex gear 22.
When the speed is changed to a low speed, the high-low speed control handle 37 is moved to a low speed position, the auxiliary shifting fork 39 is driven by the high-low speed control shaft 41, the high-low speed sliding gear 26 is shifted by the auxiliary shifting fork 39 through the high-low speed shifting fork 25, the pinion of the high-low speed sliding gear 26 is meshed with the large gear of the high-low speed duplex gear 7, when the speed is changed to a high speed, the high-low speed control handle 37 is moved to a high speed position, the auxiliary shifting fork 39 is driven by the high-low speed control shaft 41, the high-low speed sliding gear 26 is shifted by the auxiliary shifting fork 39 through the high-low speed shifting fork 25, and the large gear of the high-low speed sliding gear 26 is meshed with the pinion of the high-low speed duplex gear 7.
The gear box is 8 gears in total and comprises 6 forward gears and 2 reverse gears, the gear speed change operating handle 35 is at a 1-gear position, the high-low speed operating handle 37 is at a low-speed position and is at a I gear, the gear speed change operating handle 35 is at a 1-gear position, the high-low speed operating handle 37 is at a high-speed position and is at a II gear, the gear speed change operating handle 35 is at a 2-gear position, the high-low speed operating handle 37 is at a low-speed position and is at a III gear, the gear speed change operating handle 35 is at a 2-gear position, the high-low speed operating handle 37 is at a high-speed position and is at a IV gear, the gear speed change operating handle 35 is at a 3-gear position, the high-low speed operating handle 37 is at a high-speed position and is at a VI gear, and the speed ratio of the 6 forward gears is: i gear 1: 111.17; gear II 1: 71.49; III gear 1: 54.16; IV gear 1:35.1; v gear 1:22.54; gear VI 1:14.86; the gear speed change control handle 35 is in a reverse gear position, the high-low speed control handle 37 is in a low speed position and is in a reverse I gear, the gear speed change control handle 35 is in a reverse gear position, the high-low speed control handle 37 is in a low speed position and is in a reverse II gear, and the speed ratio of the reverse I gear is 1: 54.16; the speed ratio of the reverse II gear is 1:17.1; the ratio of the power output of the gearbox is 1:5.168.
When power is output, the power separation control handle 38 is moved, the power separation control handle 38 moves the power output sliding gear 10, so that the power output sliding gear 10 is meshed with the power small reduction gear 8, when power is output and cut off, the power separation control handle 38 is moved, the power separation control handle 38 moves the power output sliding gear 10, so that the power output sliding gear 10 is disengaged from the power small reduction gear 8.
Because the main shaft 5, the two shafts 20, the clutch power input gear shaft 16 and the bevel gear shaft 19 are used, the main shaft 5, the two shafts 20 and the bevel gear shaft 19 are distributed in a triangular mode in space, and a plurality of duplex gears are used on the shafts, the invention has the advantages of multiple gears and small volume.
Example 3:
On the basis of embodiment 1 or embodiment 2, two driving shaft tubes 29 are respectively installed at two sides of the rear lower portion of the driving box body 15, a driving shaft 30 is respectively and rotatably installed in the driving shaft tubes 29 at two sides, a driving large gear 28 is fixedly installed at one side of the driving shaft 30, a driving chain wheel 31 is fixedly installed at the other side of the driving shaft 30, the driving chain wheel 31 drives a crawler belt to walk, and the driving large gear 28 and the driving chain wheel 31 are symmetrically arranged at two sides of the driving box body 15.
As shown in FIG. 3, the steering brake assembly 12 comprises a brake rocker arm 12-1, a brake rocker arm shaft 12-2, a brake fixing seat 12-3, a brake drum 12-4, a differential mechanism mounting seat 12-5, a small reduction gear 12-6, a large bevel gear 12-7, a differential mechanism assembly 12-8, a reduction shaft 12-9 and a brake shoe 12-10, wherein the brake rocker arm 12-1, the brake rocker arm shaft 12-2, the brake fixing seat 12-3, the brake drum 12-4, the differential mechanism mounting seat 12-5, the small reduction gear 12-6, the reduction shaft 12-9 and the brake shoe 12-10 are symmetrically arranged on two sides of the steering brake assembly 12, one differential mechanism mounting seat 12-5 is fixedly arranged on two sides of the steering brake assembly 12 respectively, one differential mechanism assembly 12-8 is movably arranged between the two differential mechanism mounting seats 12-5, a large bevel gear 12-7 is fixedly arranged on the differential mechanism assembly 12-8, the large bevel gear 12-7 is always meshed with a bevel gear at one end of a bevel gear shaft 19, a reduction shaft 12-9 is respectively arranged at two sides of the differential mechanism assembly 12-8, a spline part of the reduction shaft 12-9 is inserted into a spline of the large bevel gear inside the differential mechanism assembly 12-8, a small reduction gear 12-6 is fixedly arranged in the middle of the reduction shaft 12-9, the small reduction gear 12-6 is always meshed with a driving large gear 28, the other end of the reduction shaft 12-9 extends to the outer side of a driving box 15 and is fixedly provided with a brake drum 12-4, a brake shoe 12-10 is arranged inside the brake drum 12-4, a brake fixing seat 12-3 is fixedly arranged outside the brake drum 12-4, the brake fixing seat 12-3 is movably provided with a brake eccentric shaft 12-2, and a shaft head of the brake eccentric shaft 12-2 is fixedly provided with a brake rocker arm 12-1.
When the gearbox works, a gear part on a clutch power input gear shaft 16 drives a main shaft duplex gear 2, then the main shaft duplex gear 2 drives a main shaft 5, the main shaft 5 drives a two-shaft 20 through a reverse gear sliding gear 21 or a two-shaft duplex gear 22, a bevel gear shaft 19 is driven through a high-low speed duplex gear 7 on the two-shaft 20, a large bevel gear 12-7 is driven by a bevel gear part of the bevel gear shaft 19, a large bevel gear 12-7 drives a reduction shaft 12-9, a small reduction gear 12-6 is driven by the reduction shaft 12-9, then the small reduction gear 12-6 drives a large gear 28, the large gear 28 drives a driving shaft 30, the driving shaft 30 drives a driving sprocket 31, and the driving sprocket 31 drives a crawler belt to walk.
Because the left side and the right side of the driving shaft 30 are respectively provided with one and are not communicated, only the left brake rocker arm 12-1 is moved to decelerate the left deceleration shaft 12-9, the left driving shaft 30 is driven to decelerate, the operation of moving the left brake rocker arm 12-1 does not influence the speed of the right driving shaft 30 and the speed of the right driving sprocket 31, the speed of the left crawler is higher than that of the right crawler, the left steering operation is formed, and similarly, the right steering operation is formed by only moving the right brake rocker arm 12-1, and simultaneously, when the left and right brake rocker arms 12-1 are moved, the left and right deceleration shafts 12-9 are braked simultaneously, and the driving shafts 30 and the driving sprockets 31 on the left and right sides are driven to stop, so that the braking operation is formed.
Because the differential mechanism assembly 12-8 is used in the steering brake assembly 12, the differential mechanism assembly 12-8 separates the power drive on the left side and the right side, so that the steering device has the advantage of steering without cutting off the power, and is convenient to operate and use.
The application process of the invention is as follows: when the crawler tractor is used, the clutch control handle is shifted to be used for connecting the power output of the engine, the gear is controlled by the gear speed change control handle, the current gear is controlled to be a high-speed gear or a low-speed gear by the high-speed control handle and the low-speed control handle, and the power connection or disconnection is controlled by the power separation control handle, so that the rear hanging machine tool of the crawler tractor works or stops.
When shifting gears, the clutch control handle is firstly shifted to separate the power output of the engine, then the gear speed change control handle is used for pushing the gear to a required gear, and then the clutch control handle is shifted to connect the power output of the engine.
When steering, only the left brake rocker arm is moved to perform left steering operation, and only the right brake rocker arm is moved to perform right steering operation; when the brake is applied, the brake rocker arms on the left side and the right side are simultaneously moved, and the brake is operated.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the appended claims and their equivalents, the present invention is intended to include such modifications and variations, and the components and structures of this embodiment which are not specifically described are known to those of ordinary skill in the art and commonly used structures or common means are not described one by one.
Claims (8)
1. The utility model provides a small-size crawler tractor gearbox of multi-cylinder, includes engine clutch unit (D), its characterized in that: the novel steering device also comprises a gear box body unit (A), a driving box body unit (B), a gear box upper cover unit (C), a steering brake assembly (12) and a power output shaft (14), wherein the front side of the gear box body unit (A) is fixedly connected with an engine through an engine clutch unit (D), the upper part of the gearbox body unit (A) is fixedly connected with a gearbox upper cover unit (C), the rear side of the gearbox body unit (A) is fixedly connected with a driving box body unit (B), the lower part in the driving box body unit (B) is provided with a steering brake assembly (12), and the right side of the driving box body unit (B) is rotationally connected with a power output shaft (14); the gear box body unit (A) comprises a gear box body (1), the engine clutch unit (D) comprises a clutch power input gear shaft (16) and a separation sleeve (18), the clutch power input gear shaft (16) is movably arranged at the middle lower part of the gear box body (1), a spline part at the front of the clutch power input gear shaft (16) is sleeved with a clutch, the clutch is arranged on an engine flywheel, the separation sleeve (18) is sleeved in the middle of the clutch power input gear shaft (16), and a clutch separation bearing (17) is fixedly arranged on the separation sleeve (18); a needle bearing and a bevel gear shaft (19) are rotatably arranged in the middle of a gear part of a clutch power input gear shaft (16), and a high-low speed duplex gear (7) is fixedly arranged on the bevel gear shaft (19); a main shaft (5) is rotatably arranged at the upper right of the clutch power input gear shaft (16), a main shaft duplex gear (2) is fixedly arranged on the main shaft (5), and a large gear of the main shaft duplex gear (2) is normally meshed with a gear of the clutch power input gear shaft (16); the main shaft (5) is movably provided with a 2-3 shift sliding gear (6) at the middle position, a 2-3 shift fork shaft (3) is fixedly arranged at the middle upper position of the gearbox body (1), a 2-3 shift fork (4) is movably arranged on the 2-3 shift fork shaft (3), and the head part of the 2-3 shift fork (4) is arranged in a shift fork groove at the middle position of the 2-3 shift sliding gear (6).
2. The multi-cylinder small crawler tractor gearbox of claim 1, wherein: the clutch power input gear shaft (16) is rotatably arranged on the upper left side, a two-shaft (20) is fixedly arranged in the middle of the two-shaft (20), a two-shaft duplex gear (22) is movably arranged on one side of the two-shaft (20) close to the gear of the clutch power input gear shaft (16), a reverse gear sliding gear (21) is movably arranged on the other side of the two-shaft (20), a high-low speed shifting fork shaft (23) is fixedly arranged on the upper portion of the two-shaft (20), a reverse gear shifting fork (24) and a high-low speed shifting fork (25) are movably arranged on the reverse gear high-low speed shifting fork shaft (23), shifting fork grooves are formed in the middle of the reverse gear shifting fork (24) and the high-low speed shifting fork (25), the reverse gear shifting fork (24) and the high-low speed shifting fork (25) are limited by springs and steel balls, the head of the reverse gear shifting fork (24) is arranged in the shifting fork grooves of the reverse gear sliding gear (21), and the head of the high-low speed shifting fork (25) is arranged in the shifting fork grooves of the high-low speed shifting fork (26).
3. The multi-cylinder small crawler tractor gearbox of claim 1, wherein: the driving box body unit (B) comprises a power output shifting fork shaft (9), a power output sliding gear (10), a power output shifting fork (11), a steering brake assembly (12), a power output gear shaft (13) and a driving box body (15), wherein the steering brake assembly (12) is arranged at the middle position of the driving box body (15), the power output gear shaft (13) is arranged at the upper part of the main shaft (5), the other end of the power output gear shaft (13) is arranged at the middle position of the driving box body (15), the power output sliding gear (10) is movably arranged at the middle position of the power output gear shaft (13), a shifting fork groove is formed in the middle position of the power output sliding gear (10), the power output shifting fork shaft (9) is fixedly arranged at the upper part of the transmission box body (1), the power output shifting fork (11) is movably arranged on the power output shifting fork shaft (9) through a spring and a steel ball, and the head of the power output shifting fork (11) is limited.
4. The multi-cylinder small crawler tractor gearbox of claim 1 or 2, characterized in that: the gear box upper cover unit (C) comprises a gear box upper cover (34), a control platform (46), a gear speed change control handle (35), a clutch control handle (36), a high-low speed control handle (37), a secondary shifting fork (39), a gear control shaft (40), a high-low speed control shaft (41) and a clutch control shaft (42), wherein the gear box upper cover (34) is fixedly arranged at the upper part of a gear box body (1), the control platform (46) is fixedly arranged on the gear box upper cover (34), the control platform (46) extends to deviate to the left, the clutch control shaft (42) is movably arranged at the lower part of the control platform (46), the clutch control handle (36) is fixedly arranged on the clutch control shaft (42), the gear speed change control handle (35) and the secondary shifting fork (39) are fixedly arranged on the gear control shaft (40), and when the secondary shifting fork (39) moves left and right, the head is inserted into a fork groove of a reverse gear fork (24) or a 2-3 shifting fork (4); a high-low speed control shaft (41) is movably arranged at the rear position of a gearbox upper cover (34), a high-low speed control handle (37) and an auxiliary shifting fork (39) are fixedly arranged on the high-low speed control shaft (41), and the head of the auxiliary shifting fork (39) is inserted into a shifting fork groove of the high-low speed shifting fork (25).
5. The multi-cylinder small crawler transmission of claim 1 or 3 or 4, characterized in that: the power separation control shaft seat (45) is fixedly arranged on the driving box body (15), the power separation control shaft seat (45) is sleeved with the power separation control shaft (44), the power separation control shaft (44) is fixedly provided with the power separation control handle (38) and the auxiliary shifting fork (39) respectively, the head of the auxiliary shifting fork (39) is inserted into the shifting fork groove of the power output shifting fork (11), the power output shaft (14) is movably arranged at the rear part of the driving box body (15), one end of the power output shaft (14) extends out of the box body of the driving box body (15), the power output bevel gear (27) is fixedly arranged at the middle position of the power output shaft (14), and the power output bevel gear (27) is normally meshed with the bevel gear on the power output gear shaft (13).
6. A multi-cylinder small crawler tractor gearbox according to claim 1 or 3, characterized in that: the driving box body (15) is characterized in that a driving shaft tube (29) is respectively arranged on two sides of the rear lower portion of the driving box body, a driving shaft (30) is respectively and rotatably arranged in the driving shaft tubes (29) on two sides, a driving large gear (28) is fixedly arranged on one side of the driving shaft (30), a driving chain wheel (31) is fixedly arranged on the other side of the driving shaft (30), the driving chain wheel (31) drives a crawler belt to walk, and the driving large gear (28) and the driving chain wheel (31) are symmetrically arranged on two sides of the driving box body (15).
7. The multi-cylinder small crawler transmission of claim 1 or 6, characterized in that: the steering brake assembly (12) comprises a brake rocker arm (12-1), a brake rocker arm shaft (12-2), a brake fixing seat (12-3), a brake drum (12-4), a differential mechanism mounting seat (12-5), a small reduction gear (12-6), a large bevel gear (12-7), a differential mechanism assembly (12-8), a reduction shaft (12-9) and a brake shoe (12-10), wherein the brake rocker arm (12-1), the brake rocker arm shaft (12-2), the brake fixing seat (12-3), the brake drum (12-4), the differential mechanism mounting seat (12-5), the small reduction gear (12-6), the reduction shaft (12-9) and the brake shoe (12-10) are symmetrically arranged on two sides of the steering brake assembly (12), the differential mechanism mounting seat (12-5) is movably provided with the differential mechanism assembly (12-8), the large bevel gear (12-7) is fixedly arranged on the differential mechanism assembly (12-8), one end of the large bevel gear (12-7) is fixedly meshed with the bevel gear (19) on one end of the bevel gear (12-7), a reduction shaft (12-9) is respectively arranged at two sides of a differential mechanism assembly (12-8), a spline part of the reduction shaft (12-9) is inserted into a spline of a big bevel gear inside the differential mechanism assembly (12-8), a small reduction gear (12-6) is fixedly arranged in the middle of the reduction shaft (12-9), the small reduction gear (12-6) is always meshed with a driving big gear (28), the other end of the reduction shaft (12-9) extends to the outer side of a driving box body (15), a brake drum (12-4) is fixedly arranged, a brake shoe (12-10) is arranged inside the brake drum (12-4), a brake fixing seat (12-3) is fixedly arranged on the outer side of the brake drum (12-4), a brake eccentric shaft (12-2) is movably arranged on the brake fixing seat (12-3), and a brake rocker arm (12-1) is fixedly arranged on a shaft head of the eccentric shaft (12-2).
8. The multi-cylinder small crawler tractor gearbox of claim 1, wherein: the gearbox totally comprises 8 gears, wherein the gears comprise 6 forward gears and 2 reverse gears, and the speed ratio of the 6 forward gears is as follows: i gear 1: 111.17; gear II 1: 71.49; III gear 1: 54.16; IV gear 1:35.1; v gear 1:22.54; gear VI 1:14.86; the speed ratio of the reverse I gear is 1: 54.16; the speed ratio of the reverse II gear is 1:17.1; the power take off ratio is 1:5.168.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810685196.0A CN108533696B (en) | 2018-06-28 | Multi-cylinder small crawler tractor gearbox |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810685196.0A CN108533696B (en) | 2018-06-28 | Multi-cylinder small crawler tractor gearbox |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108533696A CN108533696A (en) | 2018-09-14 |
| CN108533696B true CN108533696B (en) | 2024-06-21 |
Family
ID=
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61175347A (en) * | 1985-01-31 | 1986-08-07 | Mitsubishi Agricult Mach Co Ltd | Ultra-low speed change gear of tractor |
| CN2712698Y (en) * | 2004-04-19 | 2005-07-27 | 胡振海 | Belt driven four-wheeled tractor and speed-changing box thereof |
| CN107725694A (en) * | 2017-11-03 | 2018-02-23 | 富平县悦达机械制造有限公司 | A kind of kitten gearbox |
| CN208595202U (en) * | 2018-06-28 | 2019-03-12 | 陕西润牧农业科技有限公司 | A kind of crawler tractor gearbox in orchard, mountainous region and greenhouse |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61175347A (en) * | 1985-01-31 | 1986-08-07 | Mitsubishi Agricult Mach Co Ltd | Ultra-low speed change gear of tractor |
| CN2712698Y (en) * | 2004-04-19 | 2005-07-27 | 胡振海 | Belt driven four-wheeled tractor and speed-changing box thereof |
| CN107725694A (en) * | 2017-11-03 | 2018-02-23 | 富平县悦达机械制造有限公司 | A kind of kitten gearbox |
| CN208595202U (en) * | 2018-06-28 | 2019-03-12 | 陕西润牧农业科技有限公司 | A kind of crawler tractor gearbox in orchard, mountainous region and greenhouse |
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