CN108340776B - A drive train rear box for paddy field type crawler tractor - Google Patents
A drive train rear box for paddy field type crawler tractor Download PDFInfo
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- CN108340776B CN108340776B CN201810173334.7A CN201810173334A CN108340776B CN 108340776 B CN108340776 B CN 108340776B CN 201810173334 A CN201810173334 A CN 201810173334A CN 108340776 B CN108340776 B CN 108340776B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
- B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/02—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of clutch
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D11/00—Steering non-deflectable wheels; Steering endless tracks or the like
- B62D11/02—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides
- B62D11/06—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source
- B62D11/08—Steering non-deflectable wheels; Steering endless tracks or the like by differentially driving ground-engaging elements on opposite vehicle sides by means of a single main power source using brakes or clutches as main steering-effecting means
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)
Abstract
A rear box of a transmission system for a paddy field type crawler tractor, namely a rear box of the transmission system formed by combining a central transmission assembly, a steering clutch assembly, a disc brake assembly and a planetary mechanism final transmission assembly, can reduce the size and weight of the final transmission as far as possible on the premise of ensuring the required transmission ratio, so that the weight of the whole transmission system is reduced, and the ground specific pressure of the paddy field crawler tractor is reduced. Not only can realize the functions of speed reduction, torque increase and steering braking of the tractor, but also can lighten the weight of the whole tractor transmission system, thereby effectively reducing the ground specific pressure of the paddy field crawler tractor; meanwhile, the steering of the crawler tractor is realized by adopting a mature steering clutch technology, so that the cost of a transmission system can be reduced, and the working reliability of the whole crawler tractor is improved. The crawler belt tractor has good use value for the crawler belt tractor in paddy fields, and is suitable for new requirements of farmers on paddy field operation at present.
Description
Technical Field
The invention belongs to the field of tractors, relates to a transmission system of a paddy field type crawler tractor, and particularly relates to a transmission system rear box of the paddy field type crawler tractor.
Background
At present, with the continuous improvement of the requirements of crop growth on soil quality, a crawler tractor with relatively small specific pressure for grounding has an irreplaceable advantage in farming operation. Especially in paddy field operation, the ground specific pressure and the working reliability of the tractor are important. Therefore, the crawler tractor plays an important role in paddy field work.
In the case of its agricultural tractor as shown in fig. 1, the drive train is one of the important base members of a tractor. In particular to a rear box of a transmission system, the mass of the rear box occupies a larger proportion in the whole mass of the tractor, and the rear box functionally bears the functions of speed reduction, torque increase, steering, braking and the like of the tractor. The rear box of the tractor transmission system generally consists of a central transmission assembly, a steering system assembly, a braking system assembly, a final transmission assembly and other important components. The combination of these different types of components will directly affect the overall quality and operational reliability of the crawler.
As for the rear box of the crawler tractor transmission system, the following two types of combination are generally adopted in the prior art:
1. a combination of central drive, steering clutch, brake, external gear and final drive is used. Tractor passing through the center
The transmission and external gear final transmission realize speed reduction and torque increase; the steering and braking of the tractor are realized through the steering clutch and the brake.
2. The combination of central transmission, hydraulic control differential system, brake and planetary mechanism final transmission is adopted. The tractor realizes speed reduction and torque increase through final transmission of the central transmission and the planetary mechanism; the steering and braking of the tractor are realized through a hydraulic differential control system and a brake.
For the rear box of the crawler tractor drive system, the two combined types can realize the functions of speed reduction, torque increase, steering and braking of the tractor. In particular, the former is a typical drive train rear box combination type of a traditional crawler tractor, and each component is relatively simple in structure and relatively reliable in operation. The latter can make the track tractor turn to more nimble, turn to the radius less, is more suitable for the operation of little plot. However, these two types of combined drive train rear boxes have some drawbacks for crawler tractors mainly used in paddy fields, mainly including the following points:
1. the rear box of the transmission system adopting the first combination has the advantages that the final transmission volume and the mass of the external meshing gear are large, the ground specific pressure of the crawler tractor is easily increased, and the advantages of the crawler tractor in the paddy field operation are greatly reduced.
2. The hydraulic control differential system of the rear box of the drive train adopting the second combination has complex structure and high cost. Most importantly, the use reliability is poor, which is not an optimal scheme choice for a crawler tractor mainly used for paddy field operation.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide a rear transmission case for a paddy field type crawler tractor. The rear box of the transmission system is formed by combining the central transmission component, the steering clutch component, the disc brake component and the planetary mechanism final transmission component, so that not only can the functions of speed reduction, torque increase and steering braking of the tractor be realized, but also the weight of the whole transmission system can be reduced, and the ground specific pressure of the paddy field crawler tractor can be effectively reduced; meanwhile, the steering of the crawler tractor is realized by adopting a mature steering clutch technology, so that the cost of a transmission system can be reduced, and the working reliability of the whole crawler tractor is improved. The crawler belt tractor has good use value for the crawler belt tractor in paddy fields, and is suitable for new requirements of farmers on paddy field operation at present.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
a drive train rear box for a paddy field type crawler tractor, comprising: a left final drive assembly, a left disc brake assembly, a left steering clutch assembly, a center drive assembly, a right steering clutch assembly, a right disc brake assembly, a right final drive assembly; the central transmission assembly is positioned at the center of a rear box of the crawler tractor transmission system; the left steering clutch assembly is positioned at the left side of the central transmission assembly; the left disc brake assembly is connected through a shell and is arranged on the left side of the left steering clutch assembly; the left final drive assembly is connected through a shell and is arranged at the left side of the left steering clutch assembly; the right steering clutch assembly, the right disc brake assembly and the right final transmission assembly are sequentially and symmetrically arranged on the right side of the central transmission assembly relative to the Z plane.
The left final drive assembly includes: the driving wheel shaft felt oil seal assembly, an end cover, a framework oil seal, a first outer bearing, a final transmission shell, a first inner bearing, an adjusting gasket, a planet carrier, a gear ring, a sun gear, a spacer bush, a planet wheel shaft, a needle bearing, a planet gear, a pin, a driving shaft locking plate, a stop block, a driving shaft locking bolt, a sealing gasket, a driving shaft and a driving wheel; the final transmission shell is positioned by the radial positioning surface and fixedly arranged on the left side surface of the steering brake shell through a fastener; four bosses are uniformly distributed on the outer circular surface of the gear ring, are matched with four corresponding grooves on the inner wall of the final transmission shell, and are fixedly arranged in the final transmission shell; the sun gear is installed on an input shaft in the left disc brake assembly through spline connection; a spacer bush is arranged on the inner side of the sun gear; the first inner bearing and the first outer bearing are respectively arranged in the inner bearing hole, the outer bearing hole and the inner bearing hole of the final transmission shell; the driving shaft is supported and arranged on the first inner bearing and the first outer bearing, and a framework oil seal and a driving wheel shaft felt oil seal assembly are sequentially arranged on the shaft neck on the outer side of the driving shaft; the end cover is fixedly arranged on the outer side face of the final transmission shell through a fastener; a sealing gasket is arranged between the end cover and the final transmission shell; the planet carrier is installed on the driving shaft through spline connection, and is connected with the driving shaft into a whole through a driving shaft locking plate, a stop block and a driving shaft locking bolt;
the planetary wheel shafts are axially limited through pins and are distributed and installed on the planet carrier at 120 degrees; the planetary gear is supported and installed on a planetary wheel shaft through a needle bearing and is meshed with the sun gear and the gear ring respectively; the driving wheel is connected with the driving shaft into a whole through a fastener.
The right final drive assembly has the same structure as the left final drive assembly and is bilaterally symmetrical relative to the Z plane.
The left side disc brake assembly includes: the steering brake comprises a steering brake shell, a brake lining disc, a friction disc assembly, a brake pressure disc assembly, a brake shell bracket, a second inner bearing, an input shaft, a brake gear, a short shaft and a second outer bearing; the brake shell bracket and the steering brake shell are fixedly arranged on the outer side wall of the rear box shell in the central transmission assembly through fasteners; the second inner bearing and the second outer bearing are respectively arranged in the central bearing hole of the brake shell bracket and the steering brake shell; the input shaft is supported and mounted on the second inner bearing and the second outer bearing; the brake gear is arranged between the second inner bearing and the second outer bearing and is connected with the input shaft through a spline; the short shaft is arranged in a side wall hole of the brake shell bracket and the steering brake shell; the brake pressure plate assembly is limited by a short shaft and is arranged between a brake shell bracket and a steering brake shell; the friction disc assembly and the brake lining disc are respectively arranged on two sides of the brake pressure disc assembly and are connected with the brake gear through a spline.
The right disc brake assembly has the same structure as the left disc brake assembly and is left and right relative to the Z plane.
The left steering clutch assembly includes: the steering clutch comprises a steering clutch driven drum, a steering clutch driving drum, a steering oil cylinder assembly, an inner lock nut and an outer lock nut; the steering oil cylinder assembly is fixedly arranged on the inner side wall of the rear box shell in the central transmission assembly through a fastener; the steering clutch driving drum is connected with a rear axle shaft in the central transmission assembly through a spline and is axially locked by an inner locking nut; the steering clutch driven drum is splined to an input shaft in the left disc brake assembly and is axially locked by an outer lock nut.
The right steering clutch assembly has the same structure as the left steering clutch assembly and is symmetrical left and right relative to the Z plane.
The central transmission assembly comprises a small bevel gear, a large bevel gear, a rear axle shaft and a rear box shell; the small bevel gear is integrally manufactured with a small bevel gear shaft in the front box assembly, and the large bevel gear is fixedly arranged on the rear axle shaft through a fastener and meshed with the small bevel gear; the rear axle shaft is supported and installed on a steering oil cylinder assembly in the left steering clutch assembly and the right steering clutch assembly through a bearing.
By adopting the technical scheme, the invention can achieve the following beneficial effects:
1. the invention adopts the planetary mechanism to finally drive, so that the size and the weight of the final drive can be reduced as much as possible on the premise of ensuring the required transmission ratio, the weight of the whole drive system is lightened, and the ground specific pressure of the paddy field crawler tractor is reduced.
2. The invention adopts the combination form of the steering clutch and the final transmission of the planetary mechanism in the tractor transmission system, thereby improving the working reliability of the whole transmission system and reducing the cost, which is particularly important for paddy field type crawler tractors.
3. The final transmission input shaft adopts the simple beam supporting mode, so that the floating requirement between the steering clutch and the final transmission driving piece and the driven piece of the planetary mechanism is met while the assembly of the disc brake is not affected, and the problem of matching of the steering clutch and the final transmission of the planetary mechanism is successfully solved.
4. The transmission system rear box for the paddy field type crawler tractor has novel combination form conception, mature and reliable used component technology and low cost. The crawler belt tractor has good use value for the crawler belt tractor in paddy fields, and is suitable for new requirements of farmers on paddy field operation at present.
Drawings
FIG. 1 is a schematic diagram of a rear drive train box of a paddy field type crawler tractor of the present invention;
FIG. 2 is a schematic diagram of the outline structure of a rear box of a transmission system of a paddy field type crawler tractor according to the present invention;
FIG. 3 is a view A-A of FIG. 2;
FIG. 4 is a schematic view of a final drive assembly on the left side of a rear drive train of a crawler tractor in accordance with the present invention;
FIG. 5 is a cross-sectional view of the final drive housing part of the drive train rear box of the paddy field type crawler tractor of the present invention;
FIG. 6 is a schematic diagram of the external configuration of the gear ring part of the rear case of the transmission system of the paddy field type crawler tractor according to the present invention;
FIG. 7 is a schematic view of a left disc brake assembly of a rear drive train box of a track tractor in accordance with the present invention;
FIG. 8 is a schematic diagram of a left steering clutch assembly of a rear drive train of a paddy field type crawler tractor;
FIG. 9 is a schematic view of a center drive assembly of a rear drive train of a track tractor in paddy fields according to the present invention;
fig. 10 is a schematic diagram illustrating the operation of a rear drive train box of a paddy field type crawler tractor according to the present invention.
In the figure: 1. a left side final drive assembly; 2. A left disc brake assembly; 3. a left steering clutch assembly; 4. a central transmission assembly; 5. a right side steering clutch assembly; 6. a right disc brake assembly; 7. a right side final drive assembly; 8. driving an axle felt oil seal assembly; 9. an end cap; 10. a framework oil seal; 11. A first outer bearing; 12. a final drive housing; 12a, an inboard bearing bore; 12b, outboard bearing holes; 12c, a housing groove; 12d, radial positioning surfaces; 13. a first inner bearing; 14. adjusting the gasket; 15. a planet carrier; 16. a gear ring; 16a, gear ring bosses; 17. a sun gear; 18. a steering brake housing; 19. a brake pad; 20. a friction plate assembly; 21. a brake pressure plate assembly; 22. a brake housing bracket; 23. a steering clutch driven drum; 24. a steering clutch driving drum; 25. a steering cylinder assembly; 26. a pinion shaft; 27. bevel pinion; 28. a large bevel gear; 29. a rear axle shaft; 30. a rear case housing; 31. an inner lock nut; 32. an outer lock nut; 33. a second inner bearing; 34. an input shaft; 35. a brake gear; 36. a short shaft; 37. a second outer bearing; 38. a spacer bush; 39. a planetary wheel shaft; 40. needle roller bearings; 41. a planetary gear; 42. a pin; 43. a drive shaft locking plate; 44. a stop block; 45. a drive shaft lock bolt; 46. a gasket; 47. a drive shaft; 48. and (3) driving wheels.
In the other figure: z, the longitudinal symmetry plane of the rear transmission case.
Description of the embodiments
The present invention will be explained in more detail by the following examples, but the present invention is not limited to the following examples, and the purpose of the present invention is to protect all changes and modifications within the scope of the present invention.
As is known from fig. 1, 2 in combination with fig. 3, 4, 5, 6, a drive train rear box for a paddy field type crawler tractor comprises: a left final drive assembly 1, a left disc brake assembly 2, a left steering clutch assembly 3, a central drive assembly 4, a right steering clutch assembly 5, a right disc brake assembly 6, a right final drive assembly 7.
The left final drive assembly 1 comprises a drive wheel axle felt oil seal assembly 8, an end cover 9, a framework oil seal 10, a first outer bearing 11, a final drive shell 12, a first inner bearing 13, an adjusting gasket 14, a planet carrier 15, a gear ring 16, a sun gear 17, a spacer 38, a planet wheel axle 39, a needle bearing 40, a planet gear 41, a pin 42, a drive shaft locking plate 43, a stop block 44, a drive shaft locking bolt 45, a sealing gasket 46, a drive shaft 47 and a drive wheel 48; the final drive housing 12 is positioned by a radial positioning surface 12d and fixedly mounted on the left side of the steering brake housing 18 by fasteners; four bosses 16c are uniformly distributed on the outer circular surface of the gear ring 16, and the bosses 16c are matched with corresponding four grooves 12c on the inner wall of the final transmission shell 12 and are installed and fixed in the final transmission shell 12; the sun gear 17 is mounted on the input shaft 34 in the left disc brake assembly 2 by a splined connection; a spacer 38 is arranged on the inner side of the sun gear 17; the first inner bearing 13 and the first outer bearing 11 are respectively installed in the inner bearing hole 12b and the outer bearing hole 12a of the final drive housing 12; the driving shaft 47 is supported and installed on the first inner bearing 13 and the first outer bearing 11, and a framework oil seal 10 and a driving wheel shaft felt oil seal assembly 8 are sequentially installed on the shaft neck on the outer side of the driving shaft 47; the end cover 9 is fixedly arranged on the outer side surface of the final transmission shell 12 through a fastener; a gasket 46 is installed between the end cap 9 and the final drive housing 12; the planet carrier 15 is installed on the driving shaft 47 through spline connection, and the planet carrier 15 and the driving shaft 47 are connected into a whole through the driving shaft locking plate 43, the stop block 44 and the driving shaft locking bolt 45; the planetary wheel shafts 39 are axially limited through pins 42 and are arranged on the planetary frame 15 in 120-degree distribution; the planetary gear 41 is supportedly mounted on the planetary wheel shaft 39 through a needle bearing 40 and is meshed with the sun gear 17 and the ring gear 16, respectively; the drive wheel 48 is integrally connected to the drive shaft 47 by fasteners.
The right final drive assembly 7 has the same structure as the left final drive assembly 1 and is symmetrical left and right with respect to the Z plane.
As can be seen from fig. 3 in combination with fig. 7, the left disc brake assembly 2 comprises: steering brake housing 18, brake lining 19, friction disk assembly 20, brake pressure plate assembly 21, brake housing bracket 22, second inner bearing 33, input shaft 34, brake gear 35, stub shaft 36, second outer bearing 37, etc.; the brake housing bracket 22 and the steering brake housing 18 are fixedly arranged on the outer side wall of the rear box housing 30 in the central transmission assembly 4 through fasteners; the second inner bearing 33 and the second outer bearing 37 are respectively installed in the center bearing holes of the brake housing bracket 22 and the steering brake housing 18; the input shaft 34 is supported by and mounted on the second inner bearing 33 and the second outer bearing 37; the brake gear 35 is installed between the second inner bearing 33 and the second outer bearing 37, and is connected with the input shaft 34 through a spline; the stub shaft 36 is mounted in a sidewall aperture of the brake housing bracket 22 and the steering brake housing 18; the brake pressure plate assembly 21 is limited by a short shaft 36 and is arranged between the brake housing bracket 22 and the steering brake housing 18; the friction disc assembly 20 and the brake lining disc 19 are respectively arranged at two sides of the brake pressure disc assembly 21 and are connected with the brake gear 35 through splines.
The steering brake housing 18 and the brake housing bracket 22 are positioned by positioning pins during connection and installation to ensure the accuracy of the position between the two parts. The input shaft 34 is mounted in the form of a simply supported beam which better addresses the matching of the final drive of the steering clutch and planetary mechanism.
The right disc brake assembly 6 has the same structure as the left disc brake assembly 2 and is symmetrical left and right relative to the Z plane.
As can be seen from fig. 3 in combination with fig. 8, the left steering clutch assembly 3 includes: steering clutch driven drum 23, steering clutch driving drum 24, steering cylinder assembly 25, inner lock nut 31, outer lock nut 32; the steering cylinder assembly 25 is fixedly arranged on the inner side wall of the rear box shell 30 in the wet rear axle central transmission assembly 4 through a fastener; the steering clutch driving drum 24 is connected with a rear axle shaft 29 in the wet rear axle central transmission assembly 4 through a spline and is axially locked by an inner lock nut 31 to form a driving component of the left steering clutch assembly 3; the steering clutch driven drum 23 is splined to an input shaft 34 in the left disc brake assembly 2 and is axially locked by an outer lock nut 32 to form the driven component of the left steering clutch assembly 3.
It should be further noted that the power transmission between the driving and driven components of the left steering clutch assembly 3 is controlled by friction clutch technology.
The right steering clutch assembly 5 has the same structure as the left steering clutch assembly 3 and is symmetrical left and right relative to the Z plane.
As can be seen from fig. 3 in combination with fig. 9, the central transmission assembly 4 comprises: a small bevel gear 27, a large bevel gear 28, a rear axle shaft 29, and a rear box housing 30; the small bevel gear 27 is integrally manufactured with the small bevel gear shaft 26 in the front box assembly, and the large bevel gear 28 is fixedly arranged on the rear axle 29 through a fastener and meshed with the small bevel gear 27; the rear axle shaft 29 is bearing-mounted on the steering cylinder assemblies 25 in the left and right steering clutch assemblies 3 and 5.
The specific operation of a rear drive train box for a crawler tractor according to the present invention will be further described with reference to fig. 10.
The power of the crawler tractor transmission system is input through a small bevel gear shaft 26 and a small bevel gear 27, and the input torque is transmitted to a large bevel gear 28 through gear engagement transmission; the large bevel gear 28 transmits torque to the rear axle shaft 29 through bolting; the rear axle 29 transmits torque to the steering clutch driving drums 24 on the left and right sides through spline connection; the steering clutch driving drum 24 transmits torque to the steering clutch driven drums 23 on the left and right sides through friction clutches; the steering clutch driven drum 23 transmits torque to the input shaft 34 on the same side through spline connection; the input shafts 34 on the left and right sides transmit torque to the sun gear 17 on the same side through spline connection; the sun gear 17 transmits torque to the same side of the carrier 15 through planetary gear transmission; the planet carrier 15 transmits torque to the drive shaft 47 on the same side through a spline connection; the driving shafts 47 on the left and right sides transmit torque to the driving wheels 48 on the same side through bolting; and finally realizing the functions of power transmission, speed reduction and torque increase of the rear box of the crawler tractor transmission system by selecting a proper gear transmission ratio; when the power transmission on one side is cut off by the steering clutch and the one-side input shaft 34, the sun gear 17, the carrier 15, the drive shaft 47, the drive wheel 48 are braked by the brake gear 35, the steering function of the rear box of the crawler tractor power train can be achieved; the braking function of the rear box of the crawler tractor transmission system is realized when the power transmission on the left and right sides is cut off through the steering clutch and the input shaft 34, the sun gear 17, the planet carrier 15, the driving shaft 47 and the driving wheel 48 on the same side are braked simultaneously through the braking gears 35 on the left and right sides.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the whole of the present invention, but it is to be understood that the present invention is described in detail with reference to the foregoing embodiment, and that modifications in form or equivalents of some of the technical features described in the foregoing embodiment may be made by those skilled in the art. Modifications, equivalents, and the like, which are all intended to be included within the spirit and scope of the present invention, are intended to be included within the scope of the present invention.
Claims (6)
1. A drive train rear box for a paddy field type crawler tractor, comprising: a left final drive assembly (1), a left disc brake assembly (2), a left steering clutch assembly (3), a central drive assembly (4), a right steering clutch assembly (5), a right disc brake assembly (6), and a right final drive assembly (7); the method is characterized in that: the central transmission assembly (4) is positioned at the center of a rear box of the crawler tractor transmission system; the left steering clutch assembly (3) is positioned on the left side of the central transmission assembly (4); the left disc brake assembly (2) is connected through a shell and is arranged at the left side of the left steering clutch assembly (3); the left final drive assembly (1) is connected through a shell and is arranged at the left side of the left steering clutch assembly (3); the right steering clutch assembly (5), the right disc brake assembly (6) and the right final transmission assembly (7) are sequentially and symmetrically arranged on the right side of the central transmission assembly (4) relative to the Z plane; the left final drive assembly (1) comprises: the driving wheel shaft felt oil seal assembly (8), an end cover (9), a framework oil seal (10), a first outer bearing (11), a final transmission shell (12), a first inner bearing (13), an adjusting gasket (14), a planet carrier (15), a gear ring (16), a sun gear (17), a spacer bush (38), a planet wheel shaft (39), a needle bearing (40), a planet gear (41), a pin (42), a driving shaft locking plate (43), a stop block (44), a driving shaft locking bolt (45), a sealing gasket (46), a driving shaft (47) and a driving wheel (48); the final transmission shell (12) is positioned by a radial positioning surface (12 d) and fixedly arranged on the left side surface of the steering brake shell (18) through a fastener; four bosses (16 c) are uniformly distributed on the outer circular surface of the gear ring (16), and the four bosses (16 c) are matched with four corresponding grooves (12 c) on the inner wall of the final transmission shell (12) and are fixedly arranged in the final transmission shell (12); the sun gear (17) is mounted on an input shaft (34) in the left disc brake assembly (2) by a splined connection; a spacer bush (38) is arranged on the inner side of the sun gear (17); the first inner bearing (13) and the first outer bearing (11) are respectively arranged in inner and outer bearing holes (12 b, 12 a) of the final transmission shell (12); the driving shaft (47) is supported and installed on the first inner bearing (13) and the first outer bearing (11), and a framework oil seal (10) and a driving wheel shaft felt oil seal assembly (8) are sequentially installed on the outer side shaft neck of the driving shaft; the end cover (9) is fixedly arranged on the outer side surface of the final transmission shell (12) through a fastener; a sealing gasket (46) is arranged between the end cover (9) and the final transmission shell (12); the planet carrier (15) is installed on the driving shaft (47) through spline connection, and the planet carrier (15) and the driving shaft (47) are connected into a whole through the driving shaft locking plate (43), the stop block (44) and the driving shaft locking bolt (45); the planetary wheel shafts (39) are axially limited through pins (42) and are distributed and installed on the planet carrier (15) at 120 degrees; the planetary gear (41) is supported and mounted on a planetary wheel shaft (39) through a needle bearing (40) and is meshed with the sun gear (17) and the gear ring (16) respectively; the driving wheel (48) is connected with the driving shaft (47) into a whole through a fastener; the right final drive assembly (7) has the same structure as the left final drive assembly (1) and is bilaterally symmetrical relative to the Z plane.
2. A rear drive train box for a paddy field type crawler tractor according to claim 1, wherein: the left disc brake assembly (2) comprises: a steering brake housing (18), a brake lining disc (19), a friction disc assembly (20), a brake pressure disc assembly (21), a brake housing bracket (22), a second inner bearing (33), an input shaft (34), a brake gear (35), a short shaft (36) and a second outer bearing (37); the brake shell bracket (22) and the steering brake shell (18) are fixedly arranged on the outer side wall of the rear box shell (30) in the central transmission assembly (4) through fasteners; the second inner bearing (33) and the second outer bearing (37) are respectively arranged in the central bearing holes of the brake shell bracket (22) and the steering brake shell (18); the input shaft (34) is supported and mounted on a second inner bearing (33) and a second outer bearing (37); the brake gear (35) is arranged between the second inner bearing (33) and the second outer bearing (37) and is connected with the input shaft (34) through a spline; the stub shaft (36) is mounted in a sidewall hole of the brake housing bracket (22) and the steering brake housing (18); the brake pressure plate assembly (21) is limited by a short shaft (36) and is arranged between the brake shell bracket (22) and the steering brake shell (18); the friction disc assembly (20) and the brake lining disc (19) are respectively arranged on two sides of the brake pressure disc assembly (21) and are connected with the brake gear (35) through a spline.
3. A rear drive train box for a paddy field type crawler tractor according to claim 1, wherein: the right disc brake assembly (6) has the same structure as the left disc brake assembly (2) and is symmetrical left and right relative to the Z plane.
4. A rear drive train box for a paddy field type crawler tractor according to claim 1, wherein: the left steering clutch assembly (3) comprises: a steering clutch driven drum (23), a steering clutch driving drum (24), a steering oil cylinder assembly (25), an inner lock nut (31) and an outer lock nut (32); the steering oil cylinder assembly (25) is fixedly arranged on the inner side wall of the rear box shell (30) in the central transmission assembly (4) through a fastener; the steering clutch driving drum (24) is connected with a rear axle shaft (29) in the central transmission assembly (4) through a spline and is axially locked by an inner locking nut (31); the steering clutch driven drum (23) is splined to an input shaft (34) in the left disc brake assembly (2) and is axially locked by an outer lock nut (32).
5. A rear drive train box for a paddy field type crawler tractor according to claim 1, wherein: the right steering clutch assembly (5) has the same structure as the left steering clutch assembly (3) and is bilaterally symmetrical relative to the Z plane.
6. A rear drive train box for a paddy field type crawler tractor according to claim 1, wherein: the central transmission assembly (4) comprises a small bevel gear (27), a large bevel gear (28), a rear axle (29) and a rear box shell (30); the bevel pinion (27) is integrally manufactured with a bevel pinion shaft (26) in the front box assembly, and the bevel pinion (28) is fixedly arranged on a rear axle shaft (29) through a fastener and meshed with the bevel pinion (27); the rear axle shaft (29) is supported and mounted on steering cylinder assemblies (25) in the left steering clutch assembly (3) and the right steering clutch assembly (5) through bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810173334.7A CN108340776B (en) | 2018-03-02 | 2018-03-02 | A drive train rear box for paddy field type crawler tractor |
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| CN201810173334.7A CN108340776B (en) | 2018-03-02 | 2018-03-02 | A drive train rear box for paddy field type crawler tractor |
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| CN108340776A CN108340776A (en) | 2018-07-31 |
| CN108340776B true CN108340776B (en) | 2023-09-19 |
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| CN109139853A (en) * | 2018-08-30 | 2019-01-04 | 山推工程机械股份有限公司 | A kind of end drive mechanism, bull-dozer and Servo Control method |
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| FR970291A (en) * | 1948-08-11 | 1951-01-02 | Laurentide Equipment Company L | Improvements to tractors and similar vehicles |
| GB660134A (en) * | 1948-09-02 | 1951-10-31 | Theodore Patrick Flynn | Improvements in a power transmission train for tractors and like motor vehicles |
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| GB888130A (en) * | 1959-07-17 | 1962-01-24 | Ford Motor Co | Multiple disc clutch assembly |
| GB889590A (en) * | 1960-12-06 | 1962-02-21 | Caterpillar Tractor Co | Final drive assembly for track-type tractors |
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| JPH01273773A (en) * | 1988-04-24 | 1989-11-01 | Mitsubishi Agricult Mach Co Ltd | Rice field working vehicle for riding |
| US5011465A (en) * | 1990-04-20 | 1991-04-30 | Deere & Company | Wide speed-range multi-speed power shift transmission |
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| JP2002181141A (en) * | 2000-12-14 | 2002-06-26 | Aisin Aw Co Ltd | Automatic transmission |
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| CN200984972Y (en) * | 2006-12-22 | 2007-12-05 | 中国一拖集团有限公司 | Simple truss type crawler tractor real axle |
| CN201068100Y (en) * | 2007-08-16 | 2008-06-04 | 中国一拖集团有限公司 | Suspension arm type caterpillar tractor rear axle |
| DE102013203852A1 (en) * | 2012-03-27 | 2013-10-02 | Schaeffler Technologies AG & Co. KG | Clutch devices for dual clutch assembly of powertrain to couple drive shaft of drive motor with transmission input shaft of gear box of motor car, have brake devices connectable with housing to produce torque transmission to input shafts |
| CN202896298U (en) * | 2012-09-13 | 2013-04-24 | 南车戚墅堰机车车辆工艺研究所有限公司 | Electric vehicle transmission system |
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| CN105465289A (en) * | 2015-12-25 | 2016-04-06 | 中车戚墅堰机车车辆工艺研究所有限公司 | Hub reduction gear |
| CN106697089A (en) * | 2017-02-15 | 2017-05-24 | 长沙桑铼特农业机械设备有限公司 | Multi-channel caterpillar track equipment remote control device |
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| Publication number | Publication date |
|---|---|
| CN108340776A (en) | 2018-07-31 |
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