Crawler belt front drive axle assembly

Abstract

The utility model belongs to the technical field of tracked vehicles, and particularly relates to a track front drive axle assembly which comprises a power input shaft and a drive variable pump, the power input shaft is in transmission connection with a first power shaft, the first power shaft is in transmission connection with a second power shaft, a driving transmission gear is fixedly sleeved on the second power shaft, and a driven transmission gear is fixedly sleeved on an intermediate shaft. The left end and the right end of the intermediate shaft are sleeved with sun gears, the two planet carriers are in transmission linkage with the left output shaft and the right output shaft respectively, the output end of the hydraulic motor is in transmission linkage with the steering driving shaft, the left end and the right end of the steering driving shaft are both sleeved with steering output gears, one steering output gear is meshed with outer teeth of the gear ring on the corresponding side, and the other steering output gear is meshed with outer teeth of the gear ring on the corresponding side. And the other steering output gear is meshed with the outer teeth of the gear ring on the corresponding side through a steering idle gear. Walking of the crawler belts on the two sides is driven by the planetary gear mechanisms, and the hydraulic motor drives gear rings of the two planetary gear mechanisms to rotate reversely, so that steering and 360-degree turning of the crawler belts on the two sides are achieved.

Description

Technical Field:

[0001] The utility model belongs to the technical field of crawler vehicles, and particularly refers to a crawler front drive axle assembly. Background Art:

[0002] During operation in paddy fields, most traditional crawler-type agricultural machinery and transport vehicles adopt single-sided jaw clutch separation braking steering. When steering or making a 360° U-turn, not only is the turning radius large and the turning efficiency low, but at the same time, the crawler on the braking side will roll and damage the field or road surface. Especially in small fields or rural roads, the driving operation is very troublesome and inconvenient. Summary of the Invention:

[0003] The purpose of the utility model is to provide a crawler front drive axle assembly. The walking of the crawlers on both sides is stably transmitted by means of a planetary gear mechanism, and the ring gears of the two planetary gear mechanisms can be driven by a hydraulic motor to rotate in the reverse direction, so that the walking of the crawlers on both sides forms a differential speed, and thus steering and 360° in-situ turning can be realized, and the steering angle is small and the steering efficiency is high.

[0004] The utility model is realized as follows:

[0005] A crawler front drive axle assembly includes a power input shaft and a drive variable pump that is in power transmission with the power input shaft.

[0006] The power input shaft is in transmission connection with a first power shaft through a forward or reverse gear transmission assembly. The first power shaft is in transmission connection with a second power shaft through a gear position assembly. A driving transmission gear is fixedly sleeved on the second power shaft. A driven transmission gear that meshes with the driving transmission gear is fixedly sleeved on an intermediate shaft. Sun gears are respectively sleeved on the left and right ends of the intermediate shaft. The sun gears are in meshing cooperation with the internal teeth of a ring gear through planet gears that rotate on a planet carrier. And the two planet carriers are respectively in transmission linkage with a left output shaft and a right output shaft.

[0007] The output end of a hydraulic motor that is in hydraulic transmission with the drive variable pump is in transmission linkage with a steering drive shaft through a transmission gear set. Steering output gears are respectively sleeved on the left and right ends of the steering drive shaft. And one of the steering output gears meshes with the external teeth of the corresponding side ring gear, and the other steering output gear meshes with the external teeth of the corresponding side ring gear through a steering idler gear.

[0008] In the above-mentioned crawler front drive axle assembly, a power distribution driving gear is fixedly sleeved on the power input shaft, and a power distribution driven gear is fixedly sleeved on the input shaft of the drive variable pump. The power distribution driving gear is in meshing connection with the power distribution driven gear; or the power distribution driving gear and the power distribution driven gear are in transmission connection through an even number of power distribution idler gears that are adjacent and in meshing cooperation.

[0009] In the above-mentioned crawler front drive axle assembly, the forward or reverse gear transmission component includes a forward gear driving gear and a reverse gear driving gear rotatably sleeved on the power input shaft. The power input shaft is combined with the forward gear driving gear or the reverse gear driving gear through a forward-reverse gear engaging sleeve or a synchronizer to achieve synchronous rotation of the forward gear driving gear or the reverse gear driving gear and the power input shaft. A fourth gear driving gear meshing with the forward gear driving gear and a reverse gear driven gear driven by the reverse gear driving gear through a reverse idler gear are fixedly sleeved on the first power shaft.

[0010] In the above-mentioned crawler front drive axle assembly, the gear position component includes a first gear driving gear, a second gear driving gear, a third gear driving gear, and a fourth gear driving gear fixedly sleeved on the first power shaft. A first gear driven gear meshing with the first gear driving gear, a second gear driven gear meshing with the second gear driving gear, a third gear driven gear meshing with the third gear driving gear, and a fourth gear driven gear meshing with the fourth gear driving gear are rotatably sleeved on the first gear position shaft. The first gear position shaft is combined with the first gear driven gear or the second gear driven gear through a first-second gear engaging sleeve or a synchronizer to achieve synchronous rotation of the first gear driven gear or the second gear driven gear and the first gear position shaft. The first gear position shaft is combined with the third gear driven gear or the fourth gear driven gear through a third-fourth gear engaging sleeve or a synchronizer to achieve synchronous rotation of the third gear driven gear or the fourth gear driven gear and the first gear position shaft. The first gear position shaft is in transmission connection with the second power shaft.

[0011] In the above-mentioned crawler front drive axle assembly, a constantly meshing driving gear is fixedly sleeved on the first gear position shaft. A sub-transmission low gear driving gear, a sub-transmission high gear driving gear, and a constantly meshing driven gear meshing with the constantly meshing driving gear are fixedly sleeved on the second gear position shaft. A sub-transmission low gear driven gear meshing with the sub-transmission low gear driving gear and a sub-transmission high gear driven gear meshing with the sub-transmission high gear driving gear are rotatably sleeved on the second power shaft. The second power shaft is combined with the sub-transmission low gear driven gear or the sub-transmission high gear driven gear through a high-low gear engaging sleeve or a synchronizer to achieve synchronous rotation of the sub-transmission low gear driven gear or the sub-transmission high gear driven gear and the second power shaft.

[0012] In the above-mentioned crawler front drive axle assembly, the axial direction of the intermediate shaft is perpendicular to the axial direction of the second power shaft, and the driving bevel gear and the driven bevel gear are of a bevel gear structure.

[0013] In the above-mentioned crawler front drive axle assembly, the transmission gear group includes a steering input gear sleeved on the output end of the hydraulic motor, a steering intermediate gear 2 and a steering intermediate gear 1 meshing with the steering input gear are fixedly sleeved on the steering transmission shaft, a reduction gear 1 and a reduction gear 2 that rotate synchronously are rotatably sleeved on the steering drive shaft, and the reduction gear 1 is meshed with the steering intermediate gear 2, a reduction gear 4 and a reduction gear 3 that meshes with the reduction gear 2 are fixedly sleeved on the steering reduction shaft, and a reduction gear 5 that meshes with the reduction gear 4 is fixedly sleeved on the steering drive shaft.

[0014] In the above-mentioned crawler front drive axle assembly, the planet carrier and the corresponding output shaft are transmission-connected via a reduction assembly.

[0015] In the above-mentioned crawler front drive axle assembly, the reduction component includes a wheel side reduction driving gear fixedly sleeved on the planetary carrier, and a wheel side reduction driven gear meshing with the wheel side reduction driving gear fixedly sleeved on the corresponding output shaft.

[0016] In the above-mentioned crawler front drive axle assembly, brakes fixedly matched with the assembly housing are arranged on both of the two planet carriers.

[0017] The outstanding advantages of the utility model compared with the prior art are:

[0018] The crawlers on both sides of the utility model are stably driven by the planetary gear mechanism. At the same time, with the cooperation of the forward or reverse gear transmission component and the gear component, the crawlers can move forward and reverse under multiple speed gear transmissions, and the gear rings of the two planetary gear mechanisms can be driven by the hydraulic motor to rotate in the opposite direction, so that the crawlers on both sides form a differential, thereby realizing steering and 360° on-the-spot U-turn, and the steering angle is small and the steering efficiency is high. Description of the drawings:

[0019] Figure 1 It is a transmission diagram of the front drive axle assembly of the utility model.

[0020] In the figure: 1, power input shaft; 2, drive variable pump; 3, first power shaft; 4, second power shaft; 5, driving transmission gear; 6, driven transmission gear; 7, intermediate shaft; 8, sun gear; 9, planet carrier; 10, ring gear; 11, left output shaft; 12, right output shaft; 13, hydraulic motor; 14, steering drive shaft; 15, steering output gear; 16, steering idler gear; 17, power split driving gear; 18, power split driven gear; 19, power split idler gear; 20, forward gear driving gear; 21, reverse gear driving gear; 22, forward and reverse gear engaging sleeve or synchronizer; 23, fourth gear driving gear; 24, reverse idler gear; 25, reverse driven gear; 26, first gear driving gear; 27, second gear driving gear; 28, third gear driving gear; 29, first gear driven gear; 30, second gear driven gear; 31, third gear driven gear; 32, fourth gear driven gear; 33, first gear shaft; 34, first and second gear engaging sleeve or synchronizer; 35, third and fourth gear engaging sleeve or synchronizer; 36, constantly meshing driving gear; 37, second gear shaft; 38, auxiliary transmission low gear driving gear; 39, auxiliary transmission high gear driving gear; 40, constantly meshing driven gear; 41, auxiliary transmission low gear driven gear; 42, auxiliary transmission high gear driven gear; 43, high and low gear engaging sleeve or synchronizer; 44, steering input gear; 45, steering transmission shaft; 46, second intermediate steering gear; 47, first intermediate steering gear; 48, first reduction gear; 49, second reduction gear; 50, steering reduction shaft; 51, fourth reduction gear; 52, third reduction gear; 53, fifth reduction gear; 54, wheel side reduction driving gear; 55, wheel side reduction driven gear; 56, brake. Detailed implementation mode:

[0021] The following further describes the present utility model with specific embodiments. Refer to Figure 1 :

[0022] A crawler front drive axle assembly includes a power input shaft 1 and a drive variable pump 2 that is in power transmission with the power input shaft 1.

[0023] The power input shaft 1 is in transmission connection with the first power shaft 3 through a forward or reverse gear transmission assembly. The first power shaft 3 is in transmission connection with the second power shaft 4 through a gear position assembly. A driving transmission gear 5 is fixedly sleeved on the second power shaft 4. A driven transmission gear 6 that meshes with the driving transmission gear 5 is fixedly sleeved on the intermediate shaft 7. Sun gears 8 are respectively sleeved on the left and right ends of the intermediate shaft 7. The sun gears 8 are in meshing cooperation with the internal teeth of the ring gear 10 through planet gears that rotate on the planet carrier 9. And the two planet carriers 9 are respectively in transmission linkage with the left output shaft 11 and the right output shaft 12.

[0024] The output end of the hydraulic motor 13 hydraulically driven by the variable displacement pump 2 is in transmission linkage with the steering drive shaft 14 through a transmission gear set. Steering output gears 15 are sleeved on both the left and right ends of the steering drive shaft 14, and one of the steering output gears 15 meshes with the external teeth of the corresponding side gear ring 10, and the other steering output gear 15 meshes with the external teeth of the corresponding side gear ring 10 through a steering idler gear 16. At the same time, in this embodiment, the end of the power input shaft 1 extends outside the assembly housing and is in transmission connection with the PTO shaft.

[0025] The running of the crawlers on both sides of the present utility model is stably transmitted by means of a planetary gear mechanism. At the same time, under the transmission cooperation of the forward or reverse gear transmission assembly and the gear position assembly, the crawlers can run forward and backward under the transmission of multiple speed gears, and the gear rings 10 of the two planetary gear mechanisms can be driven to rotate reversely by the hydraulic motor 13, so that the running of the crawlers on both sides forms a differential, and thus steering and 360° in-situ turning can be realized, and the steering angle is small and the steering efficiency is high.

[0026] Among them, since both the variable displacement pump 2 and the hydraulic motor 13 are fixed on the outer wall surface of the assembly housing, in order to enable the power input shaft 1 to stably transmit power to the variable displacement pump 2, a power splitting driving gear 17 is fixedly sleeved on the power input shaft 1, and a power splitting driven gear 18 is fixedly sleeved on the input shaft of the variable displacement pump 2. The power splitting driving gear 17 and the power splitting driven gear 18 are in transmission connection through an even number of power splitting idler gears 19 that are adjacent and meshed with each other.

[0027] In order to enable the crawlers to run forward and backward, in this embodiment, the specific structure of the forward or reverse gear transmission assembly is as follows: the forward or reverse gear transmission assembly includes a forward gear driving gear 20 and a reverse gear driving gear 21 that are rotatably sleeved on the power input shaft 1. The power input shaft 1 is combined with the forward gear driving gear 20 or the reverse gear driving gear 21 through a forward and reverse gear engaging sleeve or a synchronizer 22 to realize the synchronous rotation of the forward gear driving gear 20 or the reverse gear driving gear 21 and the power input shaft 1. A fourth gear driving gear 23 that meshes with the forward gear driving gear 20 and a reverse gear driven gear 25 that is driven by the reverse gear driving gear 21 through a reverse idler gear 24 are fixedly sleeved on the power shaft 3.

[0028] The gear assembly can select a common multiple gear transmission structure. In this embodiment, the specific structure adopted by the gear assembly is: the gear assembly includes a first gear driving gear 26, a second gear driving gear 27, a third gear driving gear 28 and a fourth gear driving gear 23 fixedly sleeved on the power first shaft 3, and a first gear driven gear 29 meshing with the first gear driving gear, a second gear driven gear 30 meshing with the second gear driving gear 27, a third gear driven gear 31 meshing with the third gear driving gear 28, and a fourth gear driven gear 23 meshing with the fourth gear driving gear 24 are rotatably sleeved on the gear first shaft 33. The fourth gear driven gear 32 is meshed with the wheel 23, and the gear shaft 33 is combined with the first gear driven gear 29 or the second gear driven gear 30 through the first and second gear meshing sleeves or synchronizer 34 to achieve synchronous rotation of the first gear driven gear 29 or the second gear driven gear 30 and the gear shaft 33. The gear shaft 33 is combined with the third gear driven gear 31 or the fourth gear driven gear 32 through the third and fourth gear meshing sleeves or synchronizer 35 to achieve synchronous rotation of the third gear driven gear 31 or the fourth gear driven gear 32 and the gear shaft 33. The gear shaft 33 is transmission connected with the second power shaft 4.

[0029] In addition, the coverage of the speed gear is further expanded. The gear shaft 1 33 is fixedly sleeved with a constantly meshing driving gear 36, the gear shaft 2 37 is fixedly sleeved with a sub-speed low gear driving gear 38, a sub-speed high gear driving gear 39, and a constantly meshing driven gear 40 meshing with the constantly meshing driving gear 36, the power shaft 2 4 is rotatably sleeved with a sub-speed low gear driven gear 41 meshing with the sub-speed low gear driving gear 38, and a sub-speed high gear driven gear 42 meshing with the sub-speed high gear driving gear 39, the power shaft 2 4 is combined with the sub-speed low gear driven gear 41 or the sub-speed high gear driven gear 42 through a high and low gear meshing sleeve or a synchronizer 43 to achieve synchronous rotation of the sub-speed low gear driven gear 41 or the sub-speed high gear driven gear 42 with the power shaft 2 4.

[0030] In this embodiment, the axial direction of the intermediate shaft 7 is perpendicular to the axial direction of the second power shaft 4, and the driving transmission gear 5 meshes with the driven transmission gear 6 to form a bevel gear structure.

[0031] Taking into account that the output speed of the hydraulic motor 13 is relatively fast, in order to enable the hydraulic motor 13 to stably drive the rotation of the steering drive shaft 14 so as to accurately control the steering and walking of the tracks on both sides, the transmission gear group includes a steering input gear 44 mounted on the output end of the hydraulic motor 13, a steering intermediate gear 2 46 and a steering intermediate gear 1 47 meshing with the steering input gear 44 are fixedly sleeved on the steering transmission shaft 45, a reduction gear 1 48 and a reduction gear 2 49 that rotate synchronously are rotatably sleeved on the steering drive shaft 14, and the reduction gear 1 48 is meshed with the steering intermediate gear 2 46, a reduction gear 4 51 and a reduction gear 3 52 meshing with the reduction gear 2 49 are fixedly sleeved on the steering reduction shaft 50, and a reduction gear 5 53 meshing with the reduction gear 4 51 is fixedly sleeved on the steering drive shaft 14.

[0032] Correspondingly, in order to ensure that the crawler can move stably and have a large crawling torque, the planet carrier 9 and the corresponding output shaft are connected through a reduction assembly. In this embodiment, the reduction assembly includes a wheel-side reduction driving gear 54 fixedly sleeved on the planet carrier 9, and a wheel-side reduction driven gear 55 meshing with the wheel-side reduction driving gear 54 is fixedly sleeved on the corresponding output shaft. Of course, the reduction assembly can also adopt a planetary gear set structure.

[0033] In addition, the two planet carriers 9 are both provided with brakes 56 fixedly matched with the assembly housing.

[0034] The forward or reverse transmission route of the utility model is:

[0035] Power input shaft 1→forward or reverse gear transmission assembly→power shaft 1 3→gear assembly→power shaft 2 4→intermediate shaft 7→sun gear 8 located at both ends of intermediate shaft 7→planet carrier 9 located at both sides of intermediate shaft 7→left output shaft 11 and right output shaft 12; the power input shaft 1 is engaged with the corresponding gear through the forward or reverse gear transmission assembly, and the hydraulic motor 13 stops power output.

[0036] The steering transmission route of the utility model is:

[0037] Power input shaft 1→forward or reverse gear transmission assembly→power shaft 1 3→gear assembly→power shaft 2 4→intermediate shaft 7→sun gear 8 located at both ends of intermediate shaft 7→planet carrier 9 located at both sides of intermediate shaft 7→left output shaft 11 and right output shaft 12; the power input shaft 1 is engaged with the corresponding gear through the forward or reverse gear transmission assembly.

[0038] At the same time, the power input shaft 1 → drives the variable displacement pump 2 → the hydraulic motor 13 → the transmission gear set → the steering drive shaft 14 → the gear ring 10 located on both sides of the intermediate shaft 7;

[0039] That is, driven by the forward or reverse rotation of the hydraulic motor 13, the ring gears 10 located on both sides of the intermediate shaft 7 rotate in the reverse direction, so that a rotational differential is formed between the left output shaft 11 and the right output shaft 12. Furthermore, a differential exists between the crawlers on both sides of the crawler vehicle, achieving smooth steering. Moreover, when the steering power source rotates and drives at different speeds, the differential between the crawlers on both sides is also correspondingly different, so that different turning radii can be achieved to meet the steering requirements under different working conditions.

[0040] The 360° turning transmission route of the present utility model is as follows:

[0041] Power input shaft 1 → drive variable pump 2 → hydraulic motor 13 → transmission gear set → steering drive shaft 14 → ring gears 10 located on both sides of the intermediate shaft 7 → left output shaft 11 and right output shaft 12; at this time, the forward or reverse gear transmission component or the gear position component is in neutral, so that the sun gears 8 at both ends of the intermediate shaft 7 do not rotate;

[0042] That is, driven by the forward or reverse rotation of the hydraulic motor 13, the ring gears 10 located on both sides of the intermediate shaft 7 rotate in the reverse direction, so that the left output shaft 11 and the right output shaft 12 rotate in the reverse direction, that is, the crawlers on both sides of the crawler vehicle rotate in the reverse direction, realizing a 360° in-situ turn.

[0043] The above embodiments are only one of the preferred embodiments of the present utility model, and do not limit the scope of implementation of the present utility model. Therefore, all equivalent changes made according to the shape, structure, and principle of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A crawler front drive axle assembly, characterized in that: The invention comprises a power input shaft (1) and a driving variable displacement pump (2) for transmitting power to the power input shaft (1). The power input shaft (1) is connected to the first power shaft (3) through a forward or reverse gear transmission assembly, the first power shaft (3) is connected to the second power shaft (4) through a gear assembly, a driving transmission gear (5) is fixedly sleeved on the second power shaft (4), a driven transmission gear (6) meshing with the driving transmission gear (5) is fixedly sleeved on the intermediate shaft (7), a sun gear (8) is respectively sleeved on the left and right ends of the intermediate shaft (7), the sun gear (8) meshes with the inner teeth of the ring gear (10) through the planetary gear rotating on the planetary carrier (9), and the two planetary carriers (9) are respectively connected to the left output shaft (11) and the right output shaft (12) in a transmission linkage. The output end of the hydraulic motor (13) driven by the variable displacement pump (2) is linked to the steering drive shaft (14) through a transmission gear set. The left and right ends of the steering drive shaft (14) are both provided with steering output gears (15), and one of the steering output gears (15) is meshed with the external teeth of the corresponding side gear ring (10), and the other steering output gear (15) is meshed with the external teeth of the corresponding side gear ring (10) through a steering idler gear (16).

2. The track front drive axle assembly according to claim 1, characterized in that: A transfer driving gear (17) is fixedly sleeved on the power input shaft (1), and a transfer driven gear (18) is fixedly sleeved on the input shaft of the driving variable pump (2). The transfer driving gear (17) and the transfer driven gear (18) are meshingly connected; or the transfer driving gear (17) and the transfer driven gear (18) are transmission-connected via an even number of adjacent meshing transfer idler gears (19).

3. The front drive axle assembly of a crawler according to claim 1, characterized in that: The forward or reverse gear transmission assembly comprises a forward gear driving gear (20) and a reverse gear driving gear (21) which are rotatably sleeved on a power input shaft (1); the power input shaft (1) is coupled to the forward gear driving gear (20) or the reverse gear driving gear (21) via a forward and reverse gear meshing sleeve or a synchronizer (22) to achieve synchronous rotation of the forward gear driving gear (20) or the reverse gear driving gear (21) and the power input shaft (1); the power first shaft (3) is fixedly sleeved with a fourth gear driving gear (23) meshed with the forward gear driving gear (20), and a reverse gear driven gear (25) which is driven by the reverse gear driving gear (21) via a reverse gear idler gear (24).

4. A crawler front drive axle assembly according to claim 1 or 3, characterized in that: The gear assembly comprises a first gear driving gear (26), a second gear driving gear (27), a third gear driving gear (28) and a fourth gear driving gear (23) which are fixedly sleeved on the power first shaft (3); a first gear driven gear (29) meshing with the first gear driving gear, a second gear driven gear (30) meshing with the second gear driving gear (27), a third gear driven gear (31) meshing with the third gear driving gear (28), and a fourth gear driven gear (32) meshing with the fourth gear driving gear (23) which are rotatably sleeved on the gear first shaft (33); The first gear driven gear (29) or the second gear driven gear (30) is combined with the first gear driven gear (29) or the second gear driven gear (30) through the first and second gear meshing sleeves or synchronizers (34) to achieve synchronous rotation of the first gear driven gear (29) or the second gear driven gear (30) and the first gear shaft (33); the first gear shaft (33) is combined with the third gear driven gear (31) or the fourth gear driven gear (32) through the third and fourth gear meshing sleeves or synchronizers (35) to achieve synchronous rotation of the third gear driven gear (31) or the fourth gear driven gear (32) and the first gear shaft (33); the first gear shaft (33) is transmission-connected with the second power shaft (4).

5. The crawler front drive axle assembly according to claim 4, characterized in that: The first gear shaft (33) is fixedly sleeved with a constantly meshing driving gear (36); the second gear shaft (37) is fixedly sleeved with a secondary speed low gear driving gear (38), a secondary speed high gear driving gear (39), and a constantly meshing driven gear (40) meshing with the constantly meshing driving gear (36); the second power shaft (4) is rotatably sleeved with a secondary speed low gear driven gear (41) meshing with the secondary speed low gear driving gear (38), and a secondary speed high gear driven gear (42) meshing with the secondary speed high gear driving gear (39); the second power shaft (4) is combined with the secondary speed low gear driven gear (41) or the secondary speed high gear driven gear (42) through a high and low gear meshing sleeve or a synchronizer (43) to achieve synchronous rotation of the secondary speed low gear driven gear (41) or the secondary speed high gear driven gear (42) and the second power shaft (4).

6. The track front drive axle assembly according to claim 1, characterized in that: The axial direction of the intermediate shaft (7) is perpendicular to the axial direction of the second power shaft (4), and the active transmission gear (5) meshes with the driven transmission gear (6) to form a bevel gear structure.

7. A front drive axle assembly for a crawler vehicle according to claim 1, characterized in that: The transmission gear set comprises a steering input gear (44) sleeved on the output end of the hydraulic motor (13); a steering intermediate gear (46) and a steering intermediate gear (47) meshing with the steering input gear (44) are fixedly sleeved on the steering transmission shaft (45); a reduction gear (48) and a reduction gear (49) which rotate synchronously are rotatably sleeved on the steering drive shaft (14), and the reduction gear (48) is meshed with the steering intermediate gear (46); a reduction gear (51) and a reduction gear (52) which meshes with the reduction gear (49) are fixedly sleeved on the steering reduction shaft (50); and a reduction gear (53) which meshes with the reduction gear (51) is fixedly sleeved on the steering drive shaft (14).

8. A front drive axle assembly for crawler according to claim 1, characterized in that: The planet carrier (9) is transmission-connected to the corresponding output shaft via a reduction assembly.

9. The track front drive axle assembly according to claim 8, wherein: The deceleration assembly includes a wheel-side deceleration driving gear (54) fixedly sleeved on the planet carrier (9), and a wheel-side deceleration driven gear (55) meshing with the wheel-side deceleration driving gear (54) is fixedly sleeved on the corresponding output shaft.

10. A crawler front drive axle assembly according to claim 1 or 8, characterized in that: Brakes (56) fixedly mating with the assembly housing are provided on both of the two planet carriers (9).

Images