Planetary multiple steering mechanism and driving method thereof

Abstract

The invention discloses a planetary multiple steering mechanism and a driving method thereof, the steering mechanism comprises a gearbox body provided with an output shaft, a planet carrier and a planet wheel, an inner gear ring and an outer gear ring are arranged on the outer wall of the gearbox body, and the inner gear ring and the outer gear ring rotationally drive the output shaft to rotate and output torque; a first wet clutch bag capable of locking the planet carrier and the output shaft and a second wet clutch bag capable of fixing the planet carrier are arranged in the gearbox body. The rear end of the gearbox body is provided with a lubricating oil port used for injecting oil into the first wet clutch pack and the second wet clutch pack, a first high-pressure oil hole used for injecting oil into the first piston corresponding to the first wet clutch pack and a second high-pressure oil hole used for injecting oil into the second piston corresponding to the second wet clutch pack. The driving method comprises a two-drive mode, a non-multiple four-drive mode and a multiple four-drive mode and can be used for a tractor gearbox and a tractor steering drive axle, front wheel multiple is provided when a tractor steers, and small-radius steering is achieved.

Description

Technical Field

[0001] The invention relates to the field of transmission technology, and in particular to a planetary multiple steering mechanism and a driving method thereof. Background Art

[0002] With the development of domestic agriculture, the requirements for tractor precision operation are getting higher and higher. Two-wheel drive tractors have flexible steering and large steering angles, but insufficient traction; ordinary four-wheel drive tractors have large traction, but their steering is not as good as two-wheel drive tractors. The front and rear wheels have fixed linear speeds. When turning, the front wheel has a large turning radius and the rear wheel has a small turning radius. The linear speed of the front wheel does not match its angular velocity, causing steering resistance, resulting in an increase in the turning radius, and the front wheel dragging causes land damage. Especially when working on small plots such as paddy fields and high-economic crops, a large steering angle is required. When ordinary four-wheel drive tractors make large turns, the resistance is particularly obvious. The front wheel side pushes the soil to produce soil piles, destroying the soil structure at the head of the field. At the same time, due to the increased resistance, the fuel consumption of the tractor increases significantly when turning, which is not conducive to high-efficiency and economical operations. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a planetary multiple steering mechanism, which can be used in a tractor gearbox and a tractor steering drive axle to provide a front wheel multiple when the tractor is turning and achieve a small radius steering.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides a planetary multiple steering mechanism and a driving method thereof, wherein the steering mechanism comprises a gearbox body provided with an output shaft, a planet carrier and planetary wheels, wherein the outer wall of the gearbox body is provided with rotatable inner and outer gear rings, and when the inner and outer gear rings rotate, the output shaft is driven to rotate and output torque; a wet clutch pack 1 capable of locking the planet carrier and the output shaft and a wet clutch pack 2 capable of fixing the planet carrier are provided in the gearbox body, and a lubricating oil port for injecting oil into the wet clutch pack 1 and the wet clutch pack 2, a high-pressure oil hole 1 for injecting oil into a piston 1 corresponding to the wet clutch pack 1, and a high-pressure oil hole 2 for injecting oil into a piston 2 corresponding to the wet clutch pack 2 are provided at the rear end of the gearbox body; the driving method comprises:

[0006] Two-wheel drive mode: the inner and outer gear rings rotate, the high-pressure oil hole 1 and the high-pressure oil hole 2 are blocked, the planet carrier and the output shaft are in a free state, and the output shaft and the inner and outer gear rings can achieve free differential speed;

[0007] Non-multiple four-wheel drive mode: High-pressure oil hole 2 provides high-pressure oil to control piston 2, which pushes wet clutch pack 2 to engage, the planet carrier is fixed, the transmission between the output shaft and the inner and outer gear rings is fixed-axis transmission, the inner and outer gear rings input transmit power to the planetary gears, the planetary gears mesh with the output shaft, and transmit power to the output shaft to achieve normal four-wheel drive output;

[0008] Multiple four-wheel drive mode: High-pressure oil hole 1 provides high-pressure oil to control piston 1, piston 1 pushes wet clutch pack 1 to engage, the planetary carrier and output shaft are locked, the entire planetary transmission system becomes a whole, the speed ratio is 1, the output shaft rotates at a faster speed, and multiple four-wheel drive is achieved.

[0009] Preferably, in the gearbox body, the input shaft is supported for rotation by bearing 1 and bearing 6.

[0010] Preferably, in the gearbox body, the planet carrier is supported for rotation by bearing 2 and bearing 5.

[0011] Preferably, in the gearbox body, the inner and outer gear rings are supported for rotation by bearing four and bearing three.

[0012] Preferably, the inner and outer ring gears are internally meshed with the planetary gears; the planetary gears are connected to the planetary carriers; and the planetary gears are externally meshed with the output shafts.

[0013] Preferably, a first flow channel connecting the high-pressure oil hole 1 and the piston oil port 1 is opened in the output shaft.

[0014] Preferably, a second flow channel connecting the second high-pressure oil hole and the second oil port of the piston is opened in the output shaft.

[0015] All three modes are realized by controlling the hydraulic proportional valve with the controller. The whole machine can switch between two-wheel drive and four-wheel drive, and between multiple and non-multiple according to needs. After the multiple steering is turned on, the whole machine automatically turns on and off the multiple mode by detecting the steering angle of the front axle.

[0016] The beneficial effects of the present invention are:

[0017] This planetary multiple steering mechanism can perfectly solve the problem of large steering angles of tractors. When the steering angle of the front axle is greater than 40°, the multiple-speed steering is automatically activated to achieve large steering angle U-turns. The steering radius is small, the turning speed is fast, and the steering and U-turn efficiency is high, which reduces the damage to the soil during the steering process, improves the operation quality, and reduces the fuel consumption of tractor steering. The structure is compact, adopts planetary transmission, and has a small center distance, which can increase the ground clearance of the tractor chassis and increase the passing capacity of the whole machine. With the electro-hydraulic control of the whole machine, automatic control can be achieved to improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of a planetary multiple steering mechanism provided by an embodiment of the present invention;

[0020] Description of reference numerals:

[0021] 1. Output shaft; 2. Bearing 1; 3. Wet clutch pack 1; 4. Piston 1; 5. Planet carrier; 6. Wet clutch pack 2; 7. Piston 2; 8. Lubricating oil hole; 9. High-pressure oil hole 1; 10. High-pressure oil hole 2; 11. Bearing 2; 12. Bearing 3; 13. Inner and outer gear rings; 14. Planetary gear; 15. Bearing 4; 16. Bearing 5; 17. Bearing 6; 18. Second flow channel; 19. First flow channel. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] like Figure 1 As shown, a planetary multiple steering mechanism and a driving method thereof, the steering mechanism comprises a gearbox body provided with an output shaft 1, a planet carrier 5 and a planetary gear 14, the outer wall of the gearbox body is provided with a rotatable inner and outer gear ring 13, when the inner and outer gear ring 13 rotates, the output shaft 1 is driven to rotate and output torque; the gearbox body is provided with a wet clutch pack 13 capable of locking the planet carrier 5 with the output shaft 1 and a wet clutch pack 2 6 capable of fixing the planet carrier 5, the rear end of the gearbox body is provided with a lubricating oil port 8 for injecting oil into the wet clutch pack 1 3 and the wet clutch pack 2 6, a high-pressure oil hole 1 9 for injecting oil into a piston 1 4 corresponding to the wet clutch pack 1 3, and a high-pressure oil hole 2 10 for injecting oil into a piston 2 7 corresponding to the wet clutch pack 2 6; the driving method comprises:

[0024] Two-wheel drive mode: the inner and outer gear rings 13 rotate, the high-pressure oil hole 1 9 and the high-pressure oil hole 2 10 do not pass oil, the planet carrier 5 and the output shaft 1 are in a free state, and the output shaft 1 and the inner and outer gear rings 13 can achieve free differential;

[0025] Non-multiple four-wheel drive mode: high-pressure oil hole 210 provides high-pressure oil to control piston 27, piston 27 pushes wet clutch pack 26 to engage, planet carrier 5 is fixed, the transmission between output shaft 1 and inner and outer gear ring 13 is fixed-axis transmission, the inner and outer gear ring 13 inputs power to planetary gear 14, planetary gear 14 meshes with output shaft 1, and transmits power to output shaft 1, realizing normal four-wheel drive output;

[0026] Multiple four-wheel drive mode: high-pressure oil hole 9 provides high-pressure oil to control piston 4, piston 4 pushes wet clutch pack 3 to engage, planet carrier 5 and output shaft 1 are locked, the entire planetary transmission system becomes a whole, the speed ratio is 1, and the output shaft 1 rotates at a faster speed to achieve multiple four-wheel drive.

[0027] In the gearbox body, the input shaft 1 is supported for rotation by bearing 1 2 and bearing 6 17 .

[0028] In the gearbox body, the planet carrier 5 is supported to rotate by the second bearing 11 and the fifth bearing 16 .

[0029] In the gearbox body, the inner and outer gear rings 13 are supported to rotate by bearing four 15 and bearing three 12.

[0030] The inner and outer ring gears 13 are internally meshed with the planetary gears 14 ; the planetary gears 14 are connected to the planetary carrier 5 ; and the planetary gears 14 are externally meshed with the output shaft 1 .

[0031] All three modes are realized by controlling the hydraulic proportional valve with the controller. The whole machine can switch between two-wheel drive and four-wheel drive, and between multiple and non-multiple according to needs. After the multiple steering is turned on, the whole machine automatically turns on and off the multiple mode by detecting the steering angle of the front axle.

[0032] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A planetary multiple steering mechanism and a driving method thereof, characterized in that: The steering mechanism comprises a gearbox body provided with an output shaft (1), a planet carrier (5) and a planetary gear (14); the outer wall of the gearbox body is provided with rotatable inner and outer gear rings (13); when the inner and outer gear rings (13) rotate, the output shaft (1) is driven to rotate and output torque; the gearbox body is provided with a wet clutch pack 1 (3) capable of locking the planet carrier (5) with the output shaft (1) and a wet clutch pack 2 (6) capable of fixing the planet carrier (5); the rear end of the gearbox body is provided with a lubricating oil port (8) for injecting oil into the wet clutch pack 1 (3) and the wet clutch pack 2 (6), a high-pressure oil hole 1 (9) for injecting oil into a piston 1 (4) corresponding to the wet clutch pack 1 (3), and a high-pressure oil hole 2 (10) for injecting oil into a piston 2 (7) corresponding to the wet clutch pack 2 (6); the driving method comprises: Two-wheel drive mode: the inner and outer gear rings (13) rotate, the high-pressure oil hole 1 (9) and the high-pressure oil hole 2 (10) are blocked, the planet carrier (5) and the output shaft (1) are in a free state, and the output shaft (1) and the inner and outer gear rings (13) can achieve free differential speed; Non-multiple four-wheel drive mode: high-pressure oil hole 2 (10) provides high-pressure oil to control piston 2 (7), piston 2 (7) pushes wet clutch pack 2 (6) to engage, planet carrier (5) is fixed, the transmission between output shaft (1) and inner and outer ring gears (13) is fixed-axis transmission, the inner and outer ring gears (13) input and transmit power to planetary gears (14), the planetary gears (14) mesh with the output shaft (1), and transmit power to the output shaft (1), thereby achieving normal four-wheel drive output; Multiple four-wheel drive mode: high-pressure oil hole 1 (9) provides high-pressure oil to control piston 1 (4), piston 1 (4) pushes wet clutch pack 1 (3) to engage, planet carrier (5) and output shaft (1) are locked, the entire planetary transmission system becomes a whole, the speed ratio is 1, the output shaft (1) rotates at a higher speed, and multiple four-wheel drive is achieved.

2. A planetary multiple steering mechanism and a driving method thereof as claimed in claim 1, characterized in that: The output shaft (1) is provided with a first flow channel (19) communicating with a high-pressure oil hole (9) and an oil port of a piston (4).

3. A planetary multiple steering mechanism and a driving method thereof as claimed in claim 2, characterized in that: The output shaft (1) is provided with a second flow passage (18) communicating with the second high-pressure oil hole (10) and the oil port of the second piston (7).

4. A planetary multiple steering mechanism and a driving method thereof as claimed in claim 3, characterized in that: In the gearbox body, the input shaft (1) is supported for rotation by bearing 1 (2) and bearing 6 (17).

5. A planetary multiple steering mechanism and a driving method thereof as claimed in claim 4, characterized in that: In the gearbox body, the planet carrier (5) is supported for rotation by bearing 2 (11) and bearing 5 (16).

6. A planetary multiple steering mechanism and a driving method thereof as claimed in claim 5, characterized in that: In the gearbox body, the inner and outer gear rings (13) are supported to rotate by bearing four (15) and bearing three (12).

7. A planetary multiple steering mechanism and a driving method thereof as claimed in claim 6, characterized in that: The inner and outer gear rings (13) are internally meshed with the planetary gears (14); the planetary gears (14) are connected to the planetary carrier (5); and the planetary gears (14) are externally meshed with the output shaft (1).

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