Double-motor transmission system for tracked vehicle

Abstract

The utility model provides a double-motor transmission system for a tracked vehicle, and belongs to the technical field of tracked vehicles. The utility model relates to a planetary gear transmission device which comprises a power main shaft, a variable-speed hydrostatic motor and a reversing hydrostatic motor, a left planetary gear mechanism and a right planetary gear mechanism are provided with middle wheels, and a first output shaft of the variable-speed hydrostatic motor is in meshing transmission with the middle wheels through a gear gear set. Planet carriers of the left planet wheel mechanism and the right planet wheel mechanism are in transmission connection with a left output shaft and a right output shaft through reduction gear sets correspondingly, the output end of the reversing hydrostatic motor is meshed with a left synchronous bevel gear and a right synchronous bevel gear through a reversing bevel gear, and the left synchronous bevel gear is coaxially connected with left synchronous teeth; the right synchronous bevel gear is coaxially connected with right synchronous teeth, and the left synchronous bevel gear and the right synchronous bevel gear rotate in different directions. Power support of the two static hydraulic motors is achieved through a single power source, multi-gear advancing and various steering are achieved in combination with the two planet wheel mechanisms, the overall structure is simple, and the maintenance difficulty is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of tracked vehicles, in particular to a dual-motor transmission system for tracked vehicles. Background Art

[0002] In paddy field farming, traditional crawler agricultural machinery and transport vehicles are responsible for harvesting and transporting crops.

[0003] Existing crawler agricultural machinery relies on two power sources to independently control steering and speed change during use, which makes the power transmission structure in the transmission system more complicated and difficult to repair. At the same time, the transmission system of agricultural machinery occupies a large volume and the overall manufacturing cost is high. Summary of the invention

[0004] The purpose of the utility model is to provide a dual-motor transmission system for tracked vehicles, which realizes power input to two hydrostatic motors through a single power source input, and relies on planetary gear sets and gear sets to realize multi-speed transmission and reverse transmission, with a simple structure, reduced costs and convenient maintenance.

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

[0006] A dual-motor transmission system for a tracked vehicle comprises a power main shaft inputted by a power source, a variable-speed hydrostatic motor and a reversing hydrostatic motor, the end of the power main shaft is used for power input of the variable-speed hydrostatic motor, a driving arc gear is coaxially fixed on the power main shaft, and a driven arc gear meshing with the driving arc gear is arranged at the power input end of the reversing hydrostatic motor.

[0007] The sun gear of the left planetary gear mechanism and the sun gear of the right planetary gear mechanism are coaxially rotated and matched, and are provided with an intermediate gear located in the middle of the two planetary gear mechanisms and meshing with the spline shaft. The output shaft of the variable speed hydrostatic motor is meshed with the intermediate gear through the gear gear set for transmission. 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 the reduction gear set.

[0008] The output end of the reversing hydrostatic motor meshes the left synchronous bevel gear and the right synchronous bevel gear through the reversing bevel gear. The left synchronous bevel gear is coaxially connected with the left synchronous tooth meshing with the outer gear ring in the left planetary gear mechanism. The right synchronous bevel gear is coaxially connected with the right synchronous tooth meshing with the outer gear ring in the right planetary gear mechanism, and the left synchronous bevel gear and the right synchronous bevel gear rotate in opposite directions.

[0009] The utility model is further configured as follows: the gear position gear set includes a shift fork shaft and a shift shaft, the output shaft of the variable speed hydrostatic motor is meshed with two input teeth of different diameters, the shift shaft is sleeved with two driven teeth respectively meshed with the two input teeth, and a sliding meshing sleeve is provided between the two driven teeth, the shift fork shaft is provided with a shift fork for shifting the meshing sleeve, and the shift shaft is meshed with matching teeth meshed with the intermediate wheel.

[0010] The utility model is further configured as follows: the reduction gear set includes a reduction main gear that extends outward from the planetary carrier of the left planetary gear mechanism and rotates coaxially; a reduction intermediate shaft is provided on one side of the reduction main gear; a left output wheel rotates coaxially on the left output shaft; a reduction synchronous wheel 1 that meshes with the reduction main gear and a reduction synchronous wheel 2 that meshes with the left output wheel rotate synchronously on the reduction intermediate shaft.

[0011] The utility model is further configured such that the left planetary gear mechanism has the same structure as the right planetary gear mechanism, and includes a sun gear that rotates coaxially with the spline shaft, a plurality of planetary gears that match the sun gear are arranged in the planetary carrier, and a plurality of external gear rings that mesh with the external planetary gears, and the outer wall of the external gear ring meshes with the left synchronous tooth.

[0012] The utility model is further configured that a pulley is fixed to one end of the power main shaft, and the power source rotates the power main shaft through the flat pulley.

[0013] The utility model is further configured that one end of the shift shaft extends outwardly and is fixed with a drum brake mechanism, and the drum brake mechanism includes a shift rod for locking the shift shaft.

[0014] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

[0015] The utility model uses a single power source to provide mechanical power to two hydrostatic motors. The output end of the variable speed hydrostatic motor utilizes a gear set to realize multi-gear walking of the two planetary gear mechanisms. The reversing hydrostatic motor is utilized to realize the reversing change of the two sets of planetary gear mechanisms, realize the speed difference of the crawler tracks on both sides, realize steering and 360°, and the steering angle is small and the efficiency is high. The overall structure is simple and maintenance is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the structure of the utility model without the housing and some bolts;

[0018] Figure 3 It is a structural schematic diagram of the gear set of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the reversing part of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the planetary gear mechanism of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the left planetary mechanism of the utility model;

[0022] Reference numerals:

[0023] 1-power spindle; 10-driving arc gear; 11-pulley

[0024] 2-speed hydrostatic motor; 20-output shaft

[0025] 3-reversing hydrostatic motor; 30-reversing arc gear; 31-left synchronous bevel gear; 32-right synchronous bevel gear; 33-left synchronous gear; 34-right synchronous gear;

[0026] 4-left planetary gear mechanism; 40-spline shaft; 41-sun gear; 42-planet carrier; 43-planetary gear; 44-outer gear ring;

[0027] 5-right planetary gear mechanism; 6-intermediate gear;

[0028] 7-gear position gear set; 70-shift fork shaft; 71-shift shaft; 72-input tooth; 73-driven tooth; 74-engagement sleeve; 75-shift fork; 76-matching tooth; 77-drum brake mechanism; 78-shift lever;

[0029] 8-reduction gear set; 80-reduction main gear; 81-reduction intermediate shaft; 82-reduction synchronous wheel 1; 83-reduction synchronous wheel 2;

[0030] 9-left output shaft; 90-right output shaft; 91-left output wheel. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings. Figure 1 — Figure 6 :

[0032] A dual-motor transmission system for a tracked vehicle includes a power main shaft 1 inputted by a power source, a variable-speed hydrostatic motor 2, and a reversing hydrostatic motor 3. The end of the power main shaft 1 is used for power input of the variable-speed hydrostatic motor 2. A driving arc gear 10 is coaxially fixed on the power main shaft 1. A driven arc gear meshing with the driving arc gear 10 is provided at the power input end of the reversing hydrostatic motor 3.

[0033] The sun gear of the left planetary gear mechanism 4 and the sun gear of the right planetary gear mechanism 5 are coaxially rotated and are provided with an intermediate wheel 6 located in the middle of the two planetary gear mechanisms and meshing with the spline shaft 40. The output shaft 20 of the variable speed hydrostatic motor 2 is meshed with the intermediate wheel 6 through the gear set 7. The planet carriers 40 of the left planetary gear mechanism 4 and the right planetary gear mechanism 5 are respectively connected to the left output shaft 9 and the right output shaft 90 through the reduction gear set 8.

[0034] The output end of the reversing hydrostatic motor 3 meshes with the left synchronous bevel gear 31 and the right synchronous bevel gear 32 through the reversing bevel gear 30. The left synchronous bevel gear 31 is coaxially connected with the left synchronous tooth 33 meshing with the outer gear ring in the left planetary gear mechanism 4. The right synchronous bevel gear 32 is coaxially connected with the right synchronous tooth 34 meshing with the outer gear ring in the right planetary gear mechanism 5. The left synchronous bevel gear 31 and the right synchronous bevel gear 32 rotate in opposite directions.

[0035] The walking route of the utility model is:

[0036] like Figure 2 and Figure 3 As shown, the power source drives the rotation of the power main shaft 1, which provides power for the variable speed hydrostatic motor 2 arranged at the end. The variable speed hydrostatic motor outputs a shaft 20 that drives the intermediate wheel 6 meshing in the middle of the spline shaft 40 to rotate through the gear set 7. The rotation of the intermediate wheel 6 drives the sun gears of the planetary gear mechanisms on both sides to rotate, and the sun gear drives the left output shaft and the right output shaft to rotate through the reduction gear set.

[0037] In the above structure, the power main shaft drives the active arc gear to input the input end of the reversing hydrostatic motor, and the reversing hydrostatic motor controls the output part to rotate at different speeds, driving the left synchronous bevel gear and the right synchronous bevel gear to rotate in the opposite direction, and realizing the output of different speeds of the crawlers on both sides through the reduction gear set 8, thereby realizing flexible steering. This method has a simple structure, high integration, and can achieve differential effect with a single power source. Since the hydrostatic motor, i.e., HTS, is a prior art, it can choose to turn on or off the output and adjust the speed, and its principle will not be repeated.

[0038] Implementing a 360° rotation is:

[0039] The output shaft 20 of the variable speed hydrostatic motor does not rotate, and the output end of the reversing hydrostatic motor 3 works independently, so that the two planetary mechanisms rotate in opposite directions, that is, the outer gear ring rotates in opposite directions, thereby driving the left output shaft and the right output shaft to rotate in opposite directions, and realizing a 360° U-turn. On the contrary, the output end of the reversing hydrostatic motor is reversed to realize a 360° U-turn in the other direction.

[0040] Preferably, the gear position gear set 7 includes a shift fork shaft 70 and a shift shaft 71, and two input teeth 72 of different diameters are meshed on an output shaft of the variable speed hydrostatic motor 2, and the shift shaft 71 is sleeved with two driven teeth 73 respectively meshed with the two input teeth 72, and a sliding meshing sleeve 74 is provided between the two driven teeth 73, and a shift fork 75 for shifting the meshing sleeve 74 is provided on the shift fork shaft 70, and the shift shaft 71 is meshed with a matching tooth 76 meshed with the intermediate wheel 6.

[0041] The left and right movement of the shift fork 75 allows different driven teeth to mesh with different input teeth, giving the shift shaft 71 different rotation speeds, driving the matching teeth 76 to match the intermediate wheel 6 at different speeds.

[0042] Preferably, the reduction gear set 8 includes a reduction main gear 80 that extends outward from the planetary carrier 42 of the left planetary gear mechanism 4 and rotates coaxially, a reduction intermediate shaft 81 is provided on one side of the reduction main gear 80, a left output wheel 91 rotates coaxially on the left output shaft 9, and a reduction synchronous wheel 1 82 meshing with the reduction main gear 80 and a reduction synchronous wheel 2 83 meshing with the left output wheel 91 rotate coaxially on the reduction intermediate shaft 81.

[0043] In the above structure, one end of the right planetary gear mechanism 5 has the same reduction gear set 8 through gears, and the intermediate shaft 81 transmits the speed transmitted by the planetary carrier 42 to the left output wheel 91 through a certain reduction.

[0044] Preferably, the left planetary gear mechanism 4 has the same structure as the right planetary gear mechanism 5, and includes a sun gear 41 that rotates coaxially with the spline shaft 40, a planetary carrier 42 that is provided with a plurality of planetary gears 43 that cooperate with the sun gear 41, and an outer gear ring 44 that meshes with the outer wall of the outer gear ring 44 that meshes with the left synchronous tooth 33.

[0045] In this embodiment, the left planetary gear mechanism and the right planetary gear mechanism 5 are symmetrically arranged, the sun gears of the two mechanisms rotate coaxially through the spline shaft, and the rotation of the spline shaft is driven by the intermediate wheel 6, the rotation of the sun gear 41 drives the rotation of the planetary gear or the planetary carrier, and the planetary gear drives the rotation of the outer ring gear 44, and the two sets of planetary gears realize differential transmission and speed transmission with different directions.

[0046] Preferably, a pulley 11 is fixed to one end of the power main shaft 1 , and the power source rotates the power main shaft 1 via the pulley 11 .

[0047] Preferably, one end of the shift shaft 71 extends outward and is fixed with a drum brake mechanism 77 , and the drum brake mechanism 77 includes a lever 78 for locking the shift shaft 71 .

[0048] In the above-mentioned embodiment, a housing is also included. Except for two hydrostatic motors and a pulley, the rest of the parts are placed in the housing. The input and output ends of the two hydrostatic motors are both located in the housing. The oil can fully lubricate the gear part. The overall structure is simpler and the power requirement is lower.

[0049] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual motor transmission system for a tracked vehicle, characterized in that: The invention comprises a power main shaft (1) inputted by a power source, a variable speed hydrostatic motor (2) and a reversing hydrostatic motor (3), wherein the end of the power main shaft (1) is used for power input of the variable speed hydrostatic motor (2), a driving arc gear (10) is coaxially fixed on the power main shaft (1), and a driven arc gear meshing with the driving arc gear (10) is provided at the power input end of the reversing hydrostatic motor (3). The sun gear of the left planetary gear mechanism (4) and the sun gear of the right planetary gear mechanism (5) are coaxially rotatably matched and are provided with an intermediate gear (6) located in the middle of the two planetary gear mechanisms and meshing with the spline shaft (40). The output shaft (20) of the variable speed hydrostatic motor (2) is meshed with the intermediate gear (6) through a gear position gear set (7) for transmission. The planet carriers (42) of the left planetary gear mechanism (4) and the right planetary gear mechanism (5) are respectively connected to the left output shaft (9) and the right output shaft (90) through a reduction gear set (8). The output end of the reversing hydrostatic motor (3) meshes with a left synchronous bevel gear (31) and a right synchronous bevel gear (32) through a reversing bevel gear (30); the left synchronous bevel gear (31) is coaxially connected with a left synchronous tooth (33) meshing with an outer gear ring in the left planetary gear mechanism (4); the right synchronous bevel gear (32) is coaxially connected with a right synchronous tooth (34) meshing with an outer gear ring in the right planetary gear mechanism (5); and the left synchronous bevel gear (31) and the right synchronous bevel gear (32) rotate in opposite directions.

2. A dual-motor transmission system for a tracked vehicle according to claim 1, characterized in that: The gear position gear set (7) comprises a shift fork shaft (70) and a shift shaft (71); an output shaft (20) of the variable speed hydrostatic motor (2) is meshed with two input teeth (72) of different diameters; the shift shaft (71) is sleeved with two driven teeth (73) respectively meshed with the two input teeth (72); a sliding engagement sleeve (74) is provided between the two driven teeth (73); a shift fork (75) for shifting the engagement sleeve (74) is provided on the shift fork shaft (70); and a matching tooth (76) meshed with the intermediate wheel (6) is meshed on the shift shaft (71).

3. A dual-motor transmission system for a tracked vehicle according to claim 2, characterized in that: The reduction gear set (8) comprises a reduction main gear (80) extending outward from the planet carrier (42) of the left planetary gear mechanism (4) and coaxially rotating, a reduction intermediate shaft (81) is provided on one side of the reduction main gear (80), a left output wheel (91) is coaxially rotating on the left output shaft (9), and a reduction synchronous wheel 1 (82) meshing with the reduction main gear (80) and a reduction synchronous wheel 2 (83) meshing with the left output wheel (91) are coaxially rotating on the reduction intermediate shaft (81).

4. A dual-motor transmission system for a tracked vehicle according to claim 3, characterized in that: The left planetary gear mechanism (4) has the same structure as the right planetary gear mechanism (5), and comprises a sun gear (41) coaxially rotating with the spline shaft (40), a plurality of planetary gears (43) matched with the sun gear (41) arranged in a planetary carrier (42), an outer gear ring (44) meshing with the outer surface of the plurality of planetary gears (43), and an outer wall of the outer gear ring (44) meshing with the left synchronous tooth (33).

5. A dual-motor transmission system for a tracked vehicle according to claim 1, characterized in that: A pulley (11) is fixed to one end of the power main shaft (1), and the power source rotates the power main shaft (1) via the pulley (11).

6. A dual-motor transmission system for a tracked vehicle according to claim 2, characterized in that: One end of the shift shaft (71) extends outward and is fixed with a drum brake mechanism (77), and the drum brake mechanism (77) comprises a shift rod (78) for locking the shift shaft (71).

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