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 power input shaft, a steering hydraulic motor and a walking hydraulic motor, the output end of the walking hydraulic motor is in transmission connection with a first power shaft, and the first power shaft is in transmission fit with a second power shaft through a gear assembly. The second power shaft is sleeved with a first intermediate gear. A right shaft of the left coaxial reverser and a left shaft of the right coaxial reverser are coaxially arranged and sleeved with a second intermediate gear. The output end of the steering hydraulic motor is in transmission connection with the vertical steering shaft, the vertical steering shaft 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. On the basis of the prior art, a transmission structure is simplified, and the two hydraulic motors are adopted to drive walking and rotation respectively, so that the cost is effectively reduced, and the overall size and weight are reduced.

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] The existing Chinese invention application (publication number CN117985107A) discloses a tracked vehicle transmission system, including a steering power source, a power shaft, the power shaft is transmitted to the power shaft through a gear assembly, an intermediate gear is mounted on the power shaft, the right shaft of the left coaxial inverter is coaxially arranged with the left shaft of the right coaxial inverter and is equipped with an intermediate gear, the left shaft of the left coaxial inverter and the right shaft of the right coaxial inverter are respectively transmitted to the left output shaft and the right output shaft through a reduction gear assembly; 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 and a left steering transmission gear, and the right steering transmission shaft is equipped with a right driven bevel gear and a right steering transmission gear. Although the above structure can realize the function of steering according to different radius when walking and turning 360° when walking stops, it needs to be driven by two power sources to achieve it, which is not only costly, but also the volume of the entire transmission box is bloated and heavy, which is not suitable for the use of small tracked vehicles. Summary of the invention:

[0004] The purpose of the utility model is to provide a tracked vehicle transmission system, which simplifies the transmission structure on the basis of the existing technology and adopts two hydraulic motors to drive walking and rotation respectively, so as to effectively reduce the cost and reduce the overall volume and weight.

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

[0006] A crawler vehicle transmission system includes a power input shaft transmission-connected to an external engine, and a steering hydraulic motor and a travel hydraulic motor whose input ends are transmission-connected to the power input shaft.

[0007] The output end of the travel hydraulic motor is connected to the power shaft 1, the power shaft 1 is matched with the power shaft 2 through the gear assembly, the power shaft 2 is equipped with an intermediate gear 1, the right shaft of the left coaxial inverter is coaxially arranged with the left shaft of the right coaxial inverter and is equipped with an intermediate gear 2 meshing with the intermediate gear 1, the left shaft of the left coaxial inverter is the left output shaft, and the right shaft of the right coaxial inverter is the right output shaft;

[0008] The output end of the steering hydraulic motor is transmission-connected to the vertical steering shaft, a driving bevel gear is mounted on the vertical steering shaft, a left driven bevel gear meshing with the driving bevel gear and a left steering transmission tooth meshing with an input tooth provided on a left coaxial reverser housing are mounted on the left steering transmission shaft, and a right driven bevel gear meshing with the driving bevel gear and a right steering transmission tooth meshing with an input tooth provided on a right coaxial reverser housing are mounted on the right steering transmission shaft.

[0009] In the above-mentioned tracked vehicle transmission system, one end of the power input shaft is provided with a pulley connected to the external transmission, and the other end is linked to the input end of the travel hydraulic motor through a spline sleeve, the output end of the travel hydraulic motor is linked to one end of the power shaft through a spline sleeve, the power input shaft is provided with an input bevel gear, and the input end of the steering hydraulic motor is provided with a steering bevel gear meshing with the input bevel gear.

[0010] 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.

[0011] In the above-mentioned tracked vehicle transmission system, the left coaxial reverser and / or the right coaxial reverser includes a shell, and a left half shaft and a right half shaft respectively rotatably engaged on both sides of the shell, the left half shaft and the right half shaft located in the shell are both fixedly sleeved with half shaft gears, a plurality of staggered left planetary gears and right planetary gears are circumferentially rotatably connected in the shell, and adjacent left planetary gears are meshed with right planetary gears, the left planetary gears are meshed with the half shaft gears of the left half shaft, and the right planetary gears are meshed with the half shaft gears of the right half shaft.

[0012] In the above-mentioned tracked vehicle transmission system, the output end of the steering hydraulic motor is provided with a steering driving gear, and the vertical steering shaft is provided with a steering driven gear meshing with the steering driving gear.

[0013] In the above-mentioned tracked vehicle transmission system, the outer ends of the left output shaft and the right output shaft are both equipped with output sun gears, the output planetary gears rotatably connected to the output planetary carrier are meshed between the output sun gear and the output internal gear ring, and the output internal gear ring is circumferentially fixedly matched with the outside, and the output planetary carrier is equipped with an output drive wheel.

[0014] The outstanding advantages of the utility model compared with the prior art are:

[0015] On the basis of the prior art, the utility model simplifies the transmission structure and adopts two hydraulic motors to drive walking and rotation respectively, so as to effectively reduce the cost and reduce the overall volume and weight. Description of the drawings:

[0016] Figure 1 The utility model is an overall three-dimensional Figure 1 ;

[0017] Figure 2 The utility model is an overall three-dimensional Figure 2 ;

[0018] Figure 3 It is another cross-sectional view of the matching structure of the output shaft and the output drive wheel of the utility model.

[0019] In the figure: 1, power input shaft; 2, steering hydraulic motor; 3, travel hydraulic motor; 4, power shaft 1; 5, power shaft 2; 6, intermediate gear 1; 7, intermediate gear 2; 8, left output shaft; 9, right output shaft; 10, vertical steering shaft; 11, driving bevel gear; 12, left driven bevel gear; 13, input gear; 14, left steering transmission gear; 15, right driven bevel gear; 16, right steering transmission gear; 17, pulley; 18, input bevel gear; 19, steering bevel gear; 20, low gear driving gear; 21, high gear driving gear; 22, low gear driven gear; 23, high gear driven gear; 24, left planetary gear; 25, right planetary gear; 26, steering driving gear; 27, steering driven gear; 28, output planetary gear; 29, output inner ring gear; 30, output drive wheel; 31, output sun gear; 32, output planet carrier; 33, bridge housing; 34, wheel hub. Specific implementation method:

[0020] The present invention is further described below with reference to specific embodiments. Figure 1 —3:

[0021] A crawler vehicle transmission system includes a power input shaft 1 transmission-connected to an external engine, and a steering hydraulic motor 2 and a travel hydraulic motor 3 whose input ends are transmission-connected to the power input shaft 1.

[0022] The output end of the travel hydraulic motor 3 is connected to the power shaft 1 4, and the power shaft 1 4 is matched with the power shaft 2 5 through the gear assembly. The power shaft 2 5 is equipped with an intermediate gear 1 6. The right shaft of the left coaxial inverter is coaxially arranged with the left shaft of the right coaxial inverter and is equipped with an intermediate gear 2 7 meshing with the intermediate gear 1 6. The left shaft of the left coaxial inverter is the left output shaft 8, and the right shaft of the right coaxial inverter is the right output shaft 9.

[0023] The output end of the steering hydraulic motor 2 is transmission-connected to the vertical steering shaft 10, on which a driving bevel gear 11 is mounted, and the left steering transmission shaft is provided with a left driven bevel gear 12 meshing with the driving bevel gear 11, and a left steering transmission tooth 14 meshing with an input tooth 13 provided on the left coaxial reverser housing, and the right steering transmission shaft is provided with a right driven bevel gear 15 meshing with the driving bevel gear 11, and a right steering transmission tooth 16 meshing with the input tooth 13 provided on the right coaxial reverser housing.

[0024] On the basis of the prior art, the utility model simplifies the transmission structure and adopts two hydraulic motors to drive walking and rotation respectively, so as to effectively reduce the cost and reduce the overall volume and weight.

[0025] Among them, the travel transmission route of the utility model is:

[0026] Power input shaft 1→travel hydraulic motor 3→power shaft 1 4→gear assembly→power shaft 2 5→intermediate gear 1 6→intermediate gear 2 7→left shaft of left coaxial reverser and right shaft of right coaxial reverser; at this time, steering hydraulic motor 2 does not work.

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

[0028] Power input shaft 1→travel hydraulic motor 3→power shaft 1 4→shift gear assembly→power shaft 2 5→intermediate gear 1 6→intermediate gear 2 7→left shaft of left coaxial reverser and right shaft of right coaxial reverser;

[0029] At the same time, power input shaft 1 → steering hydraulic motor 2 → vertical steering shaft 10 → driving bevel gear 11 → left driven bevel gear 12 and right driven bevel gear 15 → left steering transmission shaft and right steering transmission shaft → left steering transmission gear 14 and right steering transmission gear 16 → input gear 13 of left coaxial reverser and input gear 13 of right coaxial reverser;

[0030] The 360° U-turn transmission route of the utility model is:

[0031] Power input shaft 1 → steering hydraulic motor 2 → vertical steering shaft 10 → driving bevel gear 11 → left driven bevel gear 12 and right driven bevel gear 15 → left steering transmission shaft and right steering transmission shaft → left steering transmission gear 14 and right steering transmission gear 16 → input gear 13 of left coaxial reverser and input gear 13 of right coaxial reverser → left shaft of left coaxial reverser and right shaft of right coaxial reverser; at this time, travel hydraulic motor 3 does not work.

[0032] Furthermore, the rotation of the power input shaft 1 is driven by an external engine, and the specific transmission matching structure of the power input shaft 1 is as follows: one end of the power input shaft 1 is provided with a pulley 17 connected to the external transmission, and the other end is linked to the input end of the travel hydraulic motor 3 through a spline sleeve, and the output end of the travel hydraulic motor 3 is linked to one end of the power shaft 4 through a spline sleeve. An input bevel gear 18 is provided on the power input shaft 1, and a steering bevel gear 19 meshing with the input bevel gear 18 is provided on the input end of the steering hydraulic motor 2.

[0033] At the same time, the gear gear assembly can select a common multiple gear transmission structure. In the present embodiment, the gear gear assembly includes a low gear driving gear 20 and a high gear driving gear 21 fixedly sleeved on the power shaft 4, and a low gear driven gear 22 meshing with the low gear driving gear 20 and a high gear driven gear 23 meshing with the high gear driving gear 21 are rotatably sleeved on the power shaft 5, and the power shaft 5 rotates synchronously with the low gear driven gear 22 or the high gear driven gear 23 through a synchronizer. The synchronizer is provided with a fork body and a fork shaft fixedly connected to the fork body, and the fork shaft drives the synchronizer to move axially through the fork body to realize the combination of the synchronizer and the low gear driven gear 22 or the high gear driven gear 23.

[0034] Moreover, in the present embodiment, the specific structure adopted by the left coaxial inverter and the right coaxial inverter is as follows: the left coaxial inverter and / or the right coaxial inverter include a shell, and a left half-shaft and a right half-shaft respectively rotatably engaged on both sides of the shell, the left half-shaft and the right half-shaft located in the shell are both fixedly sleeved with half-shaft gears, and a plurality of staggered left planetary gears 24 and right planetary gears 25 are circumferentially rotatably connected in the shell, and adjacent left planetary gears 24 and right planetary gears 25 are meshed with each other, the left planetary gear 24 is meshed with the half-shaft gear of the left half-shaft, and the right planetary gear 25 is meshed with the half-shaft gear of the right half-shaft.

[0035] In addition, in order to enable the steering hydraulic motor 2 to stably drive the vertical steering shaft 10 to rotate, the output end of the steering hydraulic motor 2 is provided with a steering driving gear 26 , and the vertical steering shaft 10 is provided with a steering driven gear 27 meshing with the steering driving gear 26 .

[0036] Compared with the prior art, the utility model simplifies the reduction assembly between the coaxial reverser and the output shaft. Therefore, in order for the utility model to provide power output equivalent to that of the prior art, the outer ends of the left output shaft 8 and the right output shaft 9 are both provided with output sun gears 31, and the output planetary gears 28 rotatably connected to the output planetary carrier 32 are meshed between the output sun gear 31 and the output internal gear ring 29, and the output internal gear ring 29 is circumferentially fixedly matched with the outside, and the output planetary carrier 32 is provided with an output drive wheel 30.

[0037] The output internal gear ring 29 can be fixed to the vehicle frame by a bridge housing 33 sleeved on the corresponding output shaft, and the matching mode between the output drive wheel 30 and the output planetary carrier 32 can be in various forms. In the present utility model, two forms are shown, one of which is shown in the figure of the specification. Figure 1 and Figure 2 As shown, the outer wall of the output planet carrier 32 is provided with an axial end along its axial direction, and the output drive wheel 30 is sleeved on the axial end; another one is shown in the accompanying drawings of the specification Figure 3 As shown, the output planetary carrier 32 and the hub 34 rotatably connected to the bridge housing 33 form a deceleration chamber, the output sun gear 31 , the output planetary gear 28 and the output internal gear ring 29 are all arranged in the deceleration chamber, and the output drive wheel 30 is mounted on the output planetary carrier 32 .

[0038] 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 power input shaft (1) drivingly connected to an external engine, and a steering hydraulic motor (2) and a travel hydraulic motor (3) whose input ends are drivingly connected to the power input shaft (1). The output end of the travel hydraulic motor (3) is transmission-connected with the first power shaft (4), the first power shaft (4) is transmission-matched with the second power shaft (5) through the gear assembly, the second power shaft (5) is provided with an intermediate gear (6), the right shaft of the left coaxial inverter is coaxially arranged with the left shaft of the right coaxial inverter and is provided with an intermediate gear (7) meshing with the first intermediate gear (6), the left shaft of the left coaxial inverter is a left output shaft (8), and the right shaft of the right coaxial inverter is a right output shaft (9); The output end of the steering hydraulic motor (2) is transmission-connected to a vertical steering shaft (10); a driving bevel gear (11) is mounted on the vertical steering shaft (10); a left driven bevel gear (12) meshing with the driving bevel gear (11) and a left steering transmission tooth (14) meshing with an input tooth (13) provided on a left coaxial reverser housing are mounted on the left steering transmission shaft; and a right driven bevel gear (15) meshing with the driving bevel gear (11) and a right steering transmission tooth (16) meshing with an input tooth (13) provided on a right coaxial reverser housing are mounted on the right steering transmission shaft.

2. A tracked vehicle transmission system according to claim 1, characterized in that: One end of the power input shaft (1) is sleeved with a pulley (17) connected to external transmission, and the other end is linked to the input end of the travel hydraulic motor (3) through a spline sleeve. The output end of the travel hydraulic motor (3) is linked to one end of the power first shaft (4) through the spline sleeve. The power input shaft (1) is sleeved with an input bevel gear (18), and the input end of the steering hydraulic motor (2) is sleeved with a steering bevel gear (19) meshing with the input bevel gear (18).

3. A tracked vehicle transmission system according to claim 1, characterized in that: The gear assembly comprises a low gear driving gear (20) and a high gear driving gear (21) fixedly sleeved on a power shaft (4); a low gear driven gear (22) meshing with the low gear driving gear (20) and a high gear driven gear (23) meshing with the high gear driving gear (21) are rotatably sleeved on the power shaft (5); the power shaft (5) rotates synchronously with the low gear driven gear (22) or the high gear driven gear (23) through a synchronizer; a shift fork body and a shift fork shaft fixedly connected to the shift fork body are provided on the synchronizer; 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 (22) or the high gear driven gear (23).

4. A tracked vehicle transmission system according to claim 1, characterized in that: The left coaxial reversing device or / and the right coaxial reversing device comprises a housing, and a left half shaft and a right half shaft respectively rotatably matched on both sides of the housing, the left half shaft and the right half shaft located in the housing are both fixedly sleeved with half shaft gears, a plurality of staggered left planetary gears (24) and right planetary gears (25) are rotatably connected in the housing, and adjacent left planetary gears (24) and right planetary gears (25) are meshed, the left planetary gear (24) is meshed with the half shaft gear of the left half shaft, and the right planetary gear (25) is meshed with the half shaft gear of the right half shaft.

5. A tracked vehicle transmission system according to claim 1, characterized in that: The output end of the steering hydraulic motor (2) is provided with a steering driving gear (26), and the vertical steering shaft (10) is provided with a steering driven gear (27) meshing with the steering driving gear (26).

6. A tracked vehicle transmission system according to claim 1, characterized in that: The outer ends of the left output shaft (8) and the right output shaft (9) are both provided with an output sun gear (31), and the output planetary gear (28) rotatably connected to the output planetary carrier (32) is meshed between the output sun gear (31) and the output inner gear ring (29), and the output inner gear ring (29) is circumferentially fixedly matched with the outside, and the output planetary carrier (32) is provided with an output drive wheel (30).

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