Transmission system of tracked vehicle

Abstract

The utility model belongs to the technical field of tracked vehicles, and particularly relates to a tracked vehicle transmission system which comprises a steering power source, a driving power source and a first power shaft, the first power shaft is in transmission with a second power shaft through a gear gear assembly, a first intermediate gear is sleeved on the second power shaft, and a second intermediate gear is sleeved on a sun wheel shaft of a left planet wheel mechanism and a sun wheel shaft of a right planet wheel mechanism. Planet carriers of the left planet wheel mechanism and the right planet wheel mechanism are in transmission with the left output shaft and the right output shaft through reduction gear assemblies respectively, and gear rings of the left planet wheel mechanism and the right planet wheel mechanism are provided with input teeth. The output end of the steering power source is sleeved with a driving bevel gear, the left steering transmission shaft is sleeved with a left driven bevel gear and left steering transmission teeth, and the right steering transmission shaft is sleeved with a right driven bevel gear and right steering transmission teeth. The crawler belts on the two sides are driven by the power driving source through the left planet wheel mechanism and the right planet wheel mechanism respectively, gear rings of the left planet wheel mechanism and the right planet wheel mechanism are driven by the steering driving source to rotate reversely, and therefore advancing, flexible steering and 360-degree turning are achieved.

Description

Technical field:

[0001] The utility model belongs to the technical field of tracked vehicles, in particular to a transmission system for tracked vehicles. Background technology:

[0002] When operating in paddy fields, since most traditional crawler agricultural machinery and transport vehicles use single-sided tooth-split brake steering, the track on the braking side will crush and damage the field or road surface when turning or making a 360° turn. For small fields or rural roads, driving operations are also cumbersome, inconvenient, and prone to failure.

[0003] At the same time, existing crawler agricultural machinery and transport vehicles adopt a bilateral hydraulic motor-driven method for power transmission, that is, an independent power drive structure is provided for each side of the crawler, and the different rotation speeds between the two crawlers are controlled separately, so as to realize the turning and 360° U-turn of the crawler chassis; however, this method also has the following problems: the left and right crawler wheels are driven independently, and it is easy to fail to produce a large differential when turning, which will make the turning radius of the agricultural machinery larger when turning and the turning efficiency lower; at the same time, the transmission structure will inevitably have misalignment errors when the crawlers on both sides are driven independently, which will cause the crawler vehicle to deviate laterally when it is straight, affecting the normal driving of the vehicle, and the transmission efficiency is low, the power consumption is high, and it is not suitable for long-term operation. Summary of the invention:

[0004] The utility model aims to provide a crawler vehicle transmission system, wherein crawlers on both sides are driven by the same power driving source through a left planetary gear mechanism and a right planetary gear mechanism respectively, and a plurality of gear transmissions are provided by means of a gear gear assembly to meet the walking requirements under different working conditions; and a steering driving source drives the gear rings of the left planetary gear mechanism and the right planetary gear mechanism to rotate in the opposite direction respectively, so that the speed difference of the crawlers on both sides is achieved, flexible steering and 360° U-turn are realized, the steering angle is small, the steering efficiency is high, and the energy consumption is low.

[0005] The utility model is achieved in this way:

[0006] A crawler vehicle transmission system includes a steering power source and a power shaft that cooperates with the driving power source.

[0007] The first power shaft is matched with the second power shaft through the gear assembly, and the second power shaft is equipped with an intermediate gear.

[0008] The sun gear shaft of the left planetary gear mechanism rotates coaxially with the sun gear shaft of the right planetary gear mechanism, and is provided with an intermediate gear 2 meshing with the intermediate gear 1. The planet carriers of the left planetary gear mechanism and the right planetary gear mechanism are respectively connected to the left output shaft and the right output shaft through a reduction gear assembly, and input teeth are provided on the outer ring walls of the gear rings of the left planetary gear mechanism and the right planetary gear mechanism.

[0009] The output end of the steering power source is equipped with a driving bevel gear, the left steering transmission shaft is equipped with a left driven bevel gear meshing with the driving bevel gear, and a left steering transmission tooth meshing with the input tooth of the left planetary gear mechanism, and the right steering transmission shaft is equipped with a right driven bevel gear meshing with the driving bevel gear, and a right steering transmission tooth meshing with the input tooth of the right planetary gear mechanism.

[0010] In the above-mentioned tracked vehicle transmission system, the axes of the planet carriers of the left planetary gear mechanism and the right planetary gear mechanism are synchronously rotatably connected with reduction transmission shafts, and the reduction transmission shafts are transmission-connected with corresponding output shafts through reduction gear assemblies.

[0011] In the above-mentioned tracked vehicle transmission system, the reduction gear assembly includes a reduction intermediate shaft, on which a reduction driven gear 1 and a reduction driving gear 2 that rotate synchronously are rotatably mounted, a corresponding reduction transmission shaft is mounted with a reduction driving gear 1 that meshes with the reduction driven gear 1, and a corresponding output shaft is mounted with a reduction driven gear 2 that meshes with the reduction driving gear 2.

[0012] In the above-mentioned tracked vehicle transmission system, the inner edge of one end of the reduction driven gear 1 extends outward along its axial direction to form an extension portion, and an external spline is provided on the extension portion. The reduction driving gear 2 is sleeved on the extension portion, and an internal spline that cooperates with the external spline is provided on the inner ring wall of the reduction driving gear 2.

[0013] In the above-mentioned tracked vehicle transmission system, the gear gear assembly includes a low-gear driving gear and a high-gear driving gear fixedly mounted on the power shaft one, and a low-gear driven gear meshing with the low-gear driving gear and a high-gear driven gear meshing with the high-gear driving gear are rotatably mounted on the power shaft two, and the power shaft two rotates synchronously with the low-gear driven gear or the high-gear driven gear through a synchronizer, and the synchronizer is provided with a shift fork body and a shift fork shaft fixedly connected to the shift fork body, and the shift fork shaft drives the synchronizer to move axially through the shift fork body to realize the combination of the synchronizer and the low-gear driven gear or the high-gear driven gear.

[0014] In the above-mentioned tracked vehicle transmission system, it also includes a box body, and the power shaft one, power shaft two, left planetary gear mechanism, right planetary gear mechanism, reduction gear set, steering power source, left steering transmission shaft and right steering transmission shaft are all arranged on the box body, one end of the power shaft one is provided with a power input driven gear, and the output end of the driving power source is meshed and transmitted with the power input driven gear through the power input driving gear.

[0015] In the above-mentioned tracked vehicle transmission system, the driving power source is a mechanical or hydraulic motor, the steering power source is a gear pump of a driving motor or a hydraulic motor, and one end of the power shaft or the power shaft is provided with a brake drum assembly for braking the rotation of the corresponding shaft.

[0016] The outstanding advantages of the utility model compared with the prior art are:

[0017] The crawlers on both sides of the utility model are driven by the same power driving source through the left planetary gear mechanism and the right planetary gear mechanism respectively, and provide a variety of gear transmissions with the help of the gear assembly to meet the walking needs under different working conditions; and the steering driving source drives the gear rings of the left planetary gear mechanism and the right planetary gear mechanism to rotate in the opposite direction, so that the speed difference of the crawlers on both sides is achieved, flexible steering and 360° U-turn are realized, the steering angle is small, the steering efficiency is high, and the energy consumption is low. Description of the drawings:

[0018] Figure 1 It is an overall stereogram of the utility model;

[0019] Figure 2 The utility model is an overall cross-sectional view Figure 1 ;

[0020] Figure 3 The utility model is an overall cross-sectional view Figure 2 .

[0021] In the figure: 1, steering power source; 2, driving power source; 3, power shaft 1; 4, power shaft 2; 5, intermediate gear 1; 6, sun gear shaft; 7, intermediate gear 2; 8, planet carrier; 9, left output shaft; 10, right output shaft; 11, ring gear; 12, input gear; 13, driving bevel gear; 14, left steering transmission shaft; 15, left driven bevel gear; 16, left steering transmission gear; 17, right steering transmission shaft; 18, right driven bevel gear; 19, right steering transmission teeth; 20, reduction transmission shaft; 21, reduction intermediate shaft; 22, reduction driven gear 1; 23, reduction driving gear 2; 24, reduction driving gear 1; 25, reduction driven gear 2; 26, extension; 27, low gear driving gear; 28, high gear driving gear; 29, low gear driven gear; 30, high gear driven gear; 31, synchronizer; 32, housing; 33, power input driven gear; 34, power input driving gear; 35, brake drum assembly. Specific implementation method:

[0022] The present invention is further described below with reference to specific embodiments. Figure 1 —3:

[0023] A tracked vehicle transmission system includes a steering power source 1 and a power shaft 3 that cooperates with a driving power source 2.

[0024] The power shaft 1 3 is matched with the power shaft 2 4 through the gear assembly, and the power shaft 2 4 is provided with an intermediate gear 1 5.

[0025] The sun gear shaft 6 of the left planetary gear mechanism rotates coaxially with the sun gear shaft 6 of the right planetary gear mechanism, and is provided with an intermediate gear 2 7 meshing with the intermediate gear 1 5. The planet carriers 8 of the left planetary gear mechanism and the right planetary gear mechanism are respectively connected to the left output shaft 9 and the right output shaft 10 through a reduction gear assembly, and the outer ring walls of the gear rings 11 of the left planetary gear mechanism and the right planetary gear mechanism are provided with input teeth 12;

[0026] The output end of the steering power source 1 is provided with a driving bevel gear 13, the left steering transmission shaft 14 is provided with a left driven bevel gear 15 meshing with the driving bevel gear 13, and a left steering transmission tooth 16 meshing with the input tooth 12 of the left planetary gear mechanism, and the right steering transmission shaft 17 is provided with a right driven bevel gear 18 meshing with the driving bevel gear 13, and a right steering transmission tooth 19 meshing with the input tooth 12 of the right planetary gear mechanism.

[0027] The travel transmission route of the utility model is:

[0028] Driving power source 2 → power shaft 1 3 → gear assembly → power shaft 2 4 → intermediate gear 1 5 → intermediate gear 2 7 → sun gear shaft 6 of left planetary gear mechanism and right planetary gear mechanism → reduction gear assembly → left output shaft 9 and right output shaft 10; at this time, the steering power source 1 does not output power.

[0029] The steering transmission route of the utility model is:

[0030] Driving power source 2 → power shaft 1 3 → gear assembly → power shaft 2 4 → intermediate gear 1 5 → intermediate gear 2 7 → sun gear shaft 6 of left planetary gear mechanism and right planetary gear mechanism → reduction gear assembly → left output shaft 9 and right output shaft 10;

[0031] At the same time, the steering power source 1 → the driving bevel gear 13 → the left driven bevel gear 15 and the right driven bevel gear 18 → the left steering transmission shaft 14 and the right steering transmission shaft 17 → the left steering transmission gear 16 and the right steering transmission gear 19 → the gear ring 11 of the left planetary gear mechanism and the right planetary gear mechanism;

[0032] That is, under the forward or reverse rotation drive of the steering power source 1, the ring gears 11 of the left planetary gear mechanism and the right planetary gear mechanism rotate in the opposite direction, so that the rotation speed of the left output shaft 9 is different from the rotation speed of the right output shaft 10, so as to realize the differential rotation of the crawler tracks on both sides of the crawler vehicle and achieve the purpose of smooth steering. In addition, the rotation drive of the steering power source 1 at different speeds can make the differential speed of the crawler tracks on both sides different accordingly, so as to achieve different steering radiuses to meet the steering requirements under different working conditions.

[0033] The 360° U-turn transmission route of the utility model is:

[0034] Steering power source 1 → driving bevel gear 13 → left driven bevel gear 15 and right driven bevel gear 18 → left steering transmission shaft 14 and right steering transmission shaft 17 → left steering transmission gear 16 and right steering transmission gear 19 → ring gear 11 of left planetary gear mechanism and right planetary gear mechanism → reduction gear assembly → left output shaft 9 and right output shaft 10; at this time, the driving power source 2 does not output power;

[0035] That is, under the forward or reverse rotation drive of the steering power source 1, the left output shaft 9 and the right output shaft 10 rotate in the opposite direction, and then the tracks on both sides of the tracked vehicle rotate in the opposite direction, realizing a 360° turn on the spot.

[0036] The crawlers on both sides of the utility model are driven by the same power driving source through the left planetary gear mechanism and the right planetary gear mechanism respectively, and provide a variety of gear transmissions with the help of the gear assembly to meet the walking needs under different working conditions; and the steering driving source drives the gear rings 11 of the left planetary gear mechanism and the right planetary gear mechanism to rotate in the opposite direction, so that the speed difference of the crawlers on both sides is achieved, flexible steering and 360° U-turn are realized, the steering angle is small, the steering efficiency is high, and the energy consumption is low.

[0037] Furthermore, the transmission mode between the reduction gear assembly and the planet carrier 8 of the corresponding planetary gear mechanism is as follows: the axes of the planet carriers 8 of the left planetary gear mechanism and the right planetary gear mechanism are synchronously rotated with a reduction transmission shaft 20, and the reduction transmission shaft 20 is transmission-connected to the corresponding output shaft through the reduction gear assembly.

[0038] In order to enable the crawler belt to be driven and rotated stably and effectively, the reduction gear assembly can adopt a common planetary reduction mechanism, and in the present embodiment, the reduction gear assembly includes a reduction intermediate shaft 21, on which a reduction driven gear 1 22 and a reduction driving gear 2 23 that rotate synchronously are rotatably mounted, a reduction driving gear 1 24 that meshes with the reduction driven gear 1 22 is mounted on the corresponding reduction transmission shaft 20, and a reduction driven gear 2 25 that meshes with the reduction driving gear 2 23 is mounted on the corresponding output shaft. In addition, in order to enable the reduction driven gear 1 22 and the reduction driving gear 2 23 to rotate synchronously, an inner edge of one end of the reduction driven gear 1 22 extends outwardly along its axial direction to form an extension portion 26, on which an external spline is provided, and the reduction driving gear 2 23 is sleeved on the extension portion 26, and an internal spline that matches the external spline is provided on the inner ring wall of the reduction driving gear 2 23.

[0039] Furthermore, the gear assembly can be provided with multiple sets of gear transmission gears, for example: the common four-speed gear transmission, and in the present embodiment, the gear assembly includes a low-speed driving gear 27 and a high-speed driving gear 28 fixedly sleeved on the power shaft 1 3, and the power shaft 2 4 is rotatably sleeved with a low-speed driven gear 29 meshing with the low-speed driving gear 27, and a high-speed driven gear 30 meshing with the high-speed driving gear 28, and the power shaft 2 4 rotates synchronously with the low-speed driven gear 29 or the high-speed driven gear 30 through a synchronizer 31, and the synchronizer 31 is provided with a fork body and a fork shaft fixedly connected to the fork body, that is, the driver can drive the synchronizer 31 to move axially through the fork shaft and the fork body to realize the combination of the synchronizer 31 with the low-speed driven gear 29 or the high-speed driven gear, thereby realizing the switching between the low-speed transmission and the high-speed transmission.

[0040] In addition, in this embodiment, a housing 32 is also included, and the power shaft 1 3, the power shaft 2 4, the left planetary gear mechanism, the right planetary gear mechanism, the reduction gear set, the steering power source 1, the left steering transmission shaft 14 and the right steering transmission shaft 17 are all arranged on the housing 32, and one end of the power shaft 1 3 is provided with a power input driven gear 33, and the output end of the driving power source 2 is meshed with the power input driven gear 33 through the power input driving gear 34. Among them, the driving power source 2 can be a mechanical motor or a hydraulic motor, or a driving motor, or even directly an engine output shaft, and the steering power source 1 can also be a driving motor or a hydraulic motor, and in this embodiment, the driving power source 2 is a hydraulic motor, and the steering power source 1 is a gear pump of a hydraulic motor; in addition, in order to achieve stable brake lock, one end of the power shaft 1 or the power shaft 2 4 is provided with a brake drum assembly 35 for braking the rotation of the corresponding shaft.

[0041] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A tracked vehicle transmission system, characterized in that: It comprises a steering power source (1) and a power shaft (3) that cooperates with a driving power source (2) in transmission. The first power shaft (3) is in transmission cooperation with the second power shaft (4) through a gear assembly, and the second power shaft (4) is provided with an intermediate gear first (5). The sun gear shaft (6) of the left planetary gear mechanism and the sun gear shaft (6) of the right planetary gear mechanism are coaxially rotatable and are provided with an intermediate gear 2 (7) meshing with the intermediate gear 1 (5). The planet carriers (8) of the left planetary gear mechanism and the right planetary gear mechanism are respectively connected to the left output shaft (9) and the right output shaft (10) through a reduction gear assembly, and the outer ring walls of the gear rings (11) of the left planetary gear mechanism and the right planetary gear mechanism are provided with input teeth (12). The output end of the steering power source (1) is provided with a driving bevel gear (13); the left steering transmission shaft (14) is provided with a left driven bevel gear (15) meshing with the driving bevel gear (13) and a left steering transmission tooth (16) meshing with the input tooth (12) of the left planetary gear mechanism; and the right steering transmission shaft (17) is provided with a right driven bevel gear (18) meshing with the driving bevel gear (13) and a right steering transmission tooth (19) meshing with the input tooth (12) of the right planetary gear mechanism.

2. A tracked vehicle transmission system according to claim 1, characterized in that: A reduction transmission shaft (20) is synchronously rotatably connected to the axes of the planet carriers (8) of the left planetary gear mechanism and the right planetary gear mechanism, and the reduction transmission shaft (20) is transmission-connected to the corresponding output shaft via a reduction gear assembly.

3. A tracked vehicle transmission system according to claim 2, characterized in that: The reduction gear assembly comprises a reduction intermediate shaft (21), on which a reduction driven gear 1 (22) and a reduction driving gear 2 (23) are rotatably mounted and synchronously rotated, a reduction driving gear 1 (24) meshing with the reduction driven gear 1 (22) is mounted on the corresponding reduction transmission shaft (20), and a reduction driven gear 2 (25) meshing with the reduction driving gear 2 (23) is mounted on the corresponding output shaft.

4. A tracked vehicle transmission system according to claim 3, characterized in that: The inner edge of one end of the deceleration driven gear (22) extends outwardly along its axial direction to form an extension portion (26), and the extension portion (26) is provided with an external spline. The deceleration driving gear (23) is sleeved on the extension portion (26), and the inner ring wall of the deceleration driving gear (23) is provided with an internal spline that matches the external spline.

5. A tracked vehicle transmission system according to claim 1, characterized in that: The gear assembly comprises a low gear driving gear (27) and a high gear driving gear (28) fixedly sleeved on the power shaft (3); a low gear driven gear (29) meshing with the low gear driving gear (27) and a high gear driven gear (30) meshing with the high gear driving gear (28) are rotatably sleeved on the power shaft (4); the power shaft (4) rotates synchronously with the low gear driven gear (29) or the high gear driven gear (30) through a synchronizer (31); a shift fork body and a shift fork shaft fixedly connected to the shift fork body are provided on the synchronizer (31); the shift fork shaft drives the synchronizer (31) to move axially through the shift fork body to realize the combination of the synchronizer (31) and the low gear driven gear (29) or the high gear driven gear (30).

6. A tracked vehicle transmission system according to claim 1, characterized in that: The invention also comprises a housing (32), wherein the first power shaft (3), the second power shaft (4), the left planetary gear mechanism, the right planetary gear mechanism, the reduction gear set, the steering power source (1), the left steering transmission shaft (14) and the right steering transmission shaft (17) are all arranged on the housing (32), one end of the first power shaft (3) is provided with a power input driven gear (33), and the output end of the driving power source (2) is meshed with the power input driven gear (33) through a power input driving gear (34) for transmission.

7. A tracked vehicle transmission system according to claim 1, characterized in that: The driving power source (2) is a mechanical or hydraulic motor, the steering power source (1) is a gear pump of a driving motor or a hydraulic motor, and one end of the power shaft (3) or the power shaft (4) is provided with a brake drum assembly (35) for braking the rotation of the corresponding shaft.

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