High-low speed transfer mechanism

Abstract

The invention relates to a high-low speed transfer mechanism. The transfer mechanism is composed of two transfer mechanism shells, four brakes, six one-way clutches, two synchronizers and two single-row planetary gear mechanisms. When the driving wheel on one side of the vehicle is on the ice surface and the driving wheel on the other side of the vehicle is on the road surface with good adhesive force, the rotating speed of the driving wheel on the ice surface is still the same as that of the driving wheel on the road surface with good adhesive force; one driving wheel of the driving axle is allowed to rotate beyond the rotating speed of the other driving wheel under the condition that the other driving wheel does not need to decelerate under the action of external force; and the transmission function of two transmission ratios is achieved.

Description

I. Technical Field

[0001] This invention relates to a high-low speed transfer mechanism, which can output the speed of the driving component (which can also be the driven gear of the main reducer, the driven gear of the transfer case, or the rotor shaft of the electric motor) and transmit it to the left and right drive wheels respectively. This allows one of the wheels of the drive axle to achieve overtaking rotation under the action of an external force without the need for the other drive wheel to decelerate. II. Background Technology

[0002] Currently, the well-known open differential is a mechanism that transmits power from the driven gear of the vehicle's main reducer to the left and right drive wheels, allowing them to rotate at different speeds. The disadvantages of an open differential are: 1. When one drive wheel is on ice and the other is on a surface with good traction, heavy acceleration can cause the icy drive wheel to slip violently, while the wheel on the surface remains stationary; in this situation, the vehicle cannot move. 2. It does not have the function of transmitting power at both high and low speeds. III. Summary of the Invention

[0003] This invention provides a high-low speed transfer mechanism. When one wheel of a vehicle is on ice and the other is on a surface with good traction, applying heavy acceleration will cause the speed of the drive wheel on the ice to match the speed of the drive wheel on the surface with good traction; at this point, the vehicle can move. It also has the function of transmitting both high and low speeds.

[0004] The technical solution adopted in this invention consists of: a driving component, a first half-shaft (which can also be a drive shaft), a first transfer mechanism housing, a B1 brake, a B2 brake, an F1 one-way clutch, an F2 one-way clutch, an F5 one-way clutch, a first synchronizer, a first gear ring, a first planetary carrier, a first set of planetary gears, a first sun gear, a second half-shaft (which can also be a drive shaft), a second transfer mechanism housing, a B3 brake, a B4 brake, an F3 one-way clutch, an F4 one-way clutch, an F6 one-way clutch, a second synchronizer, a second gear ring, a second planetary carrier, a second set of planetary gears, and a second sun gear.

[0005] The structure of this invention is as follows: a first sun gear shaft is provided with a first sun gear, a first connecting disc, a first set of bolt holes (the number of bolt holes is not limited), an inner raceway of an F5 one-way clutch, and a circular hole coaxial with the first sun gear shaft; the first connecting disc of the first sun gear can be bolted to one side of the driving member; the roller assembly of the F5 one-way clutch is installed on the inner raceway of the F5 one-way clutch provided on the first sun gear shaft; the inner circumferential surface of the first external spline engagement gear ring is the outer raceway of the roller assembly of the F5 one-way clutch; a first half-planet carrier is provided in the first planetary carrier. The system comprises a spindle bore, a first set of planetary gear shafts (the number of planetary gear shafts is not limited), a first set of drive pins, and a first retaining ring groove; a first splined connecting disc has a first set of drive pin holes, a first external spline, and a circular hole coaxial with the first sun gear shaft; the first set of drive pins is installed in the first set of drive pin holes on the first splined connecting disc; a first synchronizer assembly is installed on the first external spline on the first splined connecting disc; when the engaging sleeve of the first synchronizer assembly moves axially to the left, the internal spline gear ring of the engaging sleeve of the first synchronizer assembly can engage with the first external spline engaging gear ring. The splined end of the first half-shaft can be fitted with the spline hole of the first half-shaft for installation and power transmission; a first set of planetary gears is installed on the first set of planetary gear shafts, with one planetary gear installed on each planetary gear shaft; the first retaining ring groove, after the retaining ring is installed, can restrict the axial movement of the first splined connecting disc and the planetary gears. The first set of planetary gears is positioned between the first ring gear and the first sun gear, meshing with both. The first single-row planetary gear mechanism consists of the first ring gear, the first planetary carrier, the first set of planetary gears, and the first sun gear. The second sun gear shaft has a second sun gear, a second connecting disc, a second set of bolt holes (the number of bolt holes is not limited), the inner raceway of the F6 one-way clutch, and a circular hole coaxial with the second sun gear shaft. The second connecting disc of the second sun gear can be bolted to the other side of the driving member. The roller assembly of the F6 one-way clutch is mounted on the inner raceway of the F6 one-way clutch on the second sun gear shaft. The inner circumferential surface of the second external spline engagement ring gear is the outer raceway of the roller assembly of the F6 one-way clutch. The second planetary carrier has a second half-shaft spline hole. The system comprises: a second set of planetary gear shafts (the number of planetary gear shafts is not limited); a second set of drive pins; and a second retaining ring groove. The second splined connecting disc has a second set of drive pin holes, a second external spline, and a circular hole coaxial with the second sun gear shaft. The second set of drive pins is installed in the second set of drive pin holes on the second splined connecting disc. The second synchronizer assembly is installed on the second external spline on the second splined connecting disc. When the engaging sleeve of the second synchronizer assembly moves axially to the right, the inner spline gear ring of the engaging sleeve of the second synchronizer assembly can engage with the second external spline engaging gear ring. The spline end of the second half-shaft can be fitted with the spline hole of the second half-shaft for installation and power transmission. The second set of planetary gears is installed on the second set of planetary gear shafts, with one planetary gear installed on each planetary gear shaft. The second retaining ring groove, after the retaining ring is installed, restricts the axial movement of the second splined connecting disc and the planetary gears.The second set of planetary gears is positioned between the second ring gear and the second sun gear, meshing with both. The second single-row planetary gear mechanism consists of the second ring gear, the second planetary carrier, the second set of planetary gears, and the second sun gear. The roller assemblies of the F1 and F2 one-way clutches are mounted on the outer circumference of the first ring gear, with the outer circumferential surface of the first ring gear forming the inner raceways of the F1 and F2 one-way clutch roller assemblies. Similarly, the roller assemblies of the F3 and F4 one-way clutches are mounted on the outer circumference of the second ring gear, with the outer circumferential surface of the second ring gear forming the inner raceways of the F3 and F4 one-way clutch roller assemblies. The outer race of the F1 one-way clutch is mounted on the roller assembly of the F1 one-way clutch, and the inner circumferential surface of the outer race of the F1 one-way clutch is the outer raceway of the roller assembly of the F1 one-way clutch; the outer race of the F2 one-way clutch is mounted on the roller assembly of the F2 one-way clutch, and the inner circumferential surface of the outer race of the F2 one-way clutch is the outer raceway of the roller assembly of the F2 one-way clutch; the outer race of the F3 one-way clutch is mounted on the roller assembly of the F3 one-way clutch, and the inner circumferential surface of the outer race of the F3 one-way clutch is the outer raceway of the roller assembly of the F3 one-way clutch; the outer race of the F4 one-way clutch is mounted on the roller assembly of the F4 one-way clutch, and the inner circumferential surface of the outer race of the F4 one-way clutch is the outer raceway of the roller assembly of the F4 one-way clutch. Brake B1 is mounted on the first transfer case housing and can brake the outer race of the F1 one-way clutch; Brake B2 is mounted on the first transfer case housing and can brake the outer race of the F2 one-way clutch; Brake B3 is mounted on the second transfer case housing and can brake the outer race of the F3 one-way clutch; Brake B4 is mounted on the second transfer case housing and can brake the outer race of the F4 one-way clutch. IV. Description of the attached drawings

[0006] In the diagram: 1. Clockwise direction, 2. Counterclockwise direction, 3. Driving component, 5. First transfer mechanism housing, 6. Second transfer mechanism housing, 10. First sun gear, 11. First connecting disc, 12. First gear ring, 13. First set of planetary gears, 14. First set of bolt holes, 15. First planetary carrier, 16. First half-shaft spline hole, 17. First set of planetary gear shafts, 18. First retaining ring groove, 19. First half-shaft, 20. Second sun gear, 21. Second connecting disc, 22. Second gear ring, 23. Second set of planetary gears, 24. Second set of bolt holes, 25. Second planetary carrier, 26. Second half-shaft spline hole, 27. Second set of planetary gear shafts, 28. Second retaining ring groove, 2 9. Second half-shaft; 50. First sun gear shaft; 51. First synchronizer assembly; 52. F5 one-way clutch inner raceway; 53. First set of drive pins; 54. First set of drive pin holes; 55. First spline connecting disc; 56. First external spline engagement gear ring; 57. First engagement tooth; 58. F5 one-way clutch outer raceway; 59. First external spline; 60. Second sun gear shaft; 61. Second synchronizer assembly; 62. F6 one-way clutch inner raceway; 63. Second set of drive pins; 64. Second set of drive pin holes; 65. Second spline connecting disc; 66. Second external spline engagement gear ring; 67. Second engagement tooth; 68. F6 one-way clutch outer raceway; 69. Second external spline.

[0007] The present invention will be further described below with reference to the accompanying drawings:

[0008] Figure 1 This is a schematic diagram of the working principle of the active component (3), first transfer mechanism housing (5), brake B1, brake B2, one-way clutch F1, one-way clutch F2, first sun gear shaft (50), one-way clutch F5, first synchronizer assembly (51), first gear ring (12), first set of planetary gears (13), first planetary carrier (15), first sun gear (10), first half shaft (19), second transfer mechanism housing (6), brake B3, brake B4, one-way clutch F3, one-way clutch F4, second sun gear shaft (60), one-way clutch F6, second synchronizer assembly (61), second gear ring (22), second set of planetary gears (23), second planetary carrier (25), second sun gear (20), and second half shaft (29) of the present invention.

[0009] Figure 2 This is a top view of the first planetary carrier (15) of the present invention.

[0010] Figure 3 This is a schematic cross-sectional view of the first planetary carrier (15) of the present invention along the X1, X1 axis.

[0011] Figure 4 This is a top view of the second planetary carrier (25) of the present invention.

[0012] Figure 5 This is a cross-sectional view of the second planetary carrier (25) of the present invention along the X3 and X4 axes.

[0013] Figure 6 This is a top view of the first sun gear shaft (50) of the present invention.

[0014] Figure 7 This is a cross-sectional view of the first sun gear shaft (50) of the present invention along the Y1 and Y2 axes.

[0015] Figure 8 This is a top view of the second sun gear shaft (60) of the present invention.

[0016] Figure 9 This is a schematic cross-sectional view of the second sun gear shaft (60) of the present invention along the Y3 and Y4 axes.

[0017] Figure 10 This is a top view of the first spline connecting plate (55) of the present invention.

[0018] Figure 11 This is a cross-sectional view of the first spline connecting disc (55) of the present invention along the X5 and X6 axes.

[0019] Figure 12 This is a top view of the second spline connecting plate (65) of the present invention.

[0020] Figure 13 This is a cross-sectional view of the second spline connecting disc (55) of the present invention, cut along the X7 and X8 axes.

[0021] Figure 14a This is a side view of the first external spline engagement gear ring of the present invention.

[0022] Figure 14b This is a top view of the first external spline engagement gear ring of the present invention.

[0023] Figure 15a This is a side view of the second external spline engagement gear ring of the present invention.

[0024] Figure 15b This is a top view of the second external spline engagement gear ring of the present invention. V. Detailed Implementation Methods

[0025] like Figure 1As shown, the first sun gear shaft (50) is installed on one side of the driving member (3); the first sun gear shaft (50) is equipped with an F5 one-way clutch; the first set of transmission pins (53) provided on the first planetary carrier (15) is equipped with a first spline connecting plate (55); the first set of planetary gear shafts (17) provided on the first planetary carrier (15) is equipped with a first set of planetary gears (13); the first half-shaft spline hole (16) provided on the first planetary carrier (15) is equipped with the spline end of the first half-shaft (19); the first sun gear (10) provided on the first sun gear shaft (50) together with the first planetary carrier (15), the first set of planetary gears (13), and the first gear ring (12) form a first single-row planetary gear mechanism; the first spline connecting plate (55) is equipped with a first synchronizer assembly (51); when the first engagement sleeve of the first synchronizer assembly (51) moves to the left along the axial direction, the inner spline gear ring of the first engagement sleeve can engage with the first outer spline engagement gear ring (56). The roller assembly of the F1 one-way clutch is mounted on the first gear ring (12). The outer circumferential surface of the first gear ring (12) serves as the inner raceway of the F1 one-way clutch. The outer ring of the F1 one-way clutch is mounted on the roller assembly of the F1 one-way clutch. The inner circumferential surface of the outer ring of the F1 one-way clutch serves as the outer raceway of the F1 one-way clutch. The B1 brake is mounted on the first transfer case housing (5). The B1 brake can brake the outer ring of the F1 one-way clutch. The roller assembly of the F2 one-way clutch is mounted on the first gear ring (12). The outer circumferential surface of the first gear ring (12) serves as the inner raceway of the F2 one-way clutch. The outer ring of the F2 one-way clutch is mounted on the roller assembly of the F2 one-way clutch. The inner circumferential surface of the outer ring of the F2 one-way clutch serves as the outer raceway of the F2 one-way clutch. The B2 brake is mounted on the first transfer case housing (5). The B2 brake can brake the outer ring of the F2 one-way clutch. The second sun gear shaft (60) is installed on the other side of the driving member (3); the second sun gear shaft (60) is equipped with an F6 one-way clutch; the second planetary carrier (25) is equipped with a second spline connecting plate (65) on the first set of transmission pins (63); the second planetary carrier (25) is equipped with a second set of planetary gear shafts (27) on the second planetary carrier (25) on the second set of planetary gear shafts (27) on the second set of planetary gear shafts (23); the spline end of the second half shaft (29) is installed in the second half shaft spline hole (26) of the second planetary carrier (25); the first sun gear (10) of the second sun gear shaft (60) together with the second planetary carrier (25), the second set of planetary gears (23) and the second gear ring (22) form a second single-row planetary gear mechanism; the second spline connecting plate (65) is equipped with a second synchronizer assembly (61); when the second engagement sleeve of the second synchronizer assembly (61) moves to the right along the axial direction, the inner spline gear ring of the second engagement sleeve can engage with the second outer spline engagement gear ring (66).The roller assembly of the F3 one-way clutch is mounted on the second gear ring (22). The outer circumferential surface of the second gear ring (22) serves as the inner raceway of the F3 one-way clutch. The outer ring of the F3 one-way clutch is mounted on the roller assembly of the F3 one-way clutch. The inner circumferential surface of the outer ring of the F3 one-way clutch serves as the outer raceway of the F3 one-way clutch. The B3 brake is mounted on the second transfer mechanism housing (6). The B3 brake can brake the outer ring of the F3 one-way clutch. The roller assembly of the F4 one-way clutch is mounted on the second gear ring (22). The outer circumferential surface of the second gear ring (22) serves as the inner raceway of the F4 one-way clutch. The outer ring of the F4 one-way clutch is mounted on the roller assembly of the F4 one-way clutch. The inner circumferential surface of the outer ring of the F4 one-way clutch serves as the outer raceway of the F4 one-way clutch. The B4 brake is mounted on the second transfer mechanism housing (6). The B4 brake can brake the outer ring of the F4 one-way clutch.

[0026] like Figure 2 As shown, the first planetary carrier (15) is provided with a first half-shaft spline hole (16), a first set of planetary gear shafts (17), and a first set of transmission pins (53).

[0027] like Figure 3 As shown, the first planetary carrier (15) is provided with a first half-shaft spline hole (16), a first set of planetary gear shafts (17), a first set of transmission pins (53), and a first retaining ring groove (18).

[0028] like Figure 4 As shown, the second planetary carrier (25) is provided with a second half-shaft spline hole (26), a second set of planetary gear shafts (27), and a second set of transmission pins (63).

[0029] like Figure 5 As shown, the second planetary carrier (25) is provided with a second half-shaft spline hole (26), a second set of planetary gear shafts (27), a second set of transmission pins (63), and a second retaining ring groove (28).

[0030] like Figure 6 As shown, a first sun gear (10), an inner raceway (52) of the F5 one-way clutch, a first connecting disc (11), and a first set of bolt holes (14) are provided on the first sun gear shaft (50).

[0031] like Figure 7 As shown, a first sun gear (10), an inner raceway (52) of the F5 one-way clutch, a first connecting disc (11), and a first set of bolt holes (14) are provided on the first sun gear shaft (50).

[0032] like Figure 8As shown, a second sun gear (20), an inner raceway (62) of the F6 one-way clutch, a second connecting disc (21), and a second set of bolt holes (24) are provided on the second sun gear shaft (60).

[0033] like Figure 9 As shown, a second sun gear (20), an inner raceway (62) of the F6 one-way clutch, a second connecting disc (21), and a second set of bolt holes (24) are provided on the second sun gear shaft (60).

[0034] like Figure 10 As shown, the first spline connecting plate (55) is provided with a first external spline (59) and a first set of transmission pin holes (54).

[0035] like Figure 11 As shown, the first spline connecting plate (55) is provided with a first external spline (59) and a first set of transmission pin holes (54).

[0036] like Figure 12 As shown, a second external spline (59) and a second set of transmission pin holes (64) are provided on the second spline connecting plate (65).

[0037] like Figure 13 As shown, a second external spline (59) and a second set of transmission pin holes (64) are provided on the second spline connecting plate (65).

[0038] like Figure 14a As shown, a first engagement tooth (57) is provided on the outer circumference of the first external spline engagement tooth ring (56).

[0039] like Figure 14b As shown, a first engagement tooth (57) is provided on the outer circumference of the first external spline engagement gear ring (56), and an F5 one-way clutch outer raceway (58) is provided on the inner circumference of the first external spline engagement gear ring (56).

[0040] like Figure 15a As shown, a first engagement tooth (67) is provided on the outer circumference of the second external spline engagement tooth ring (66).

[0041] like Figure 15b As shown, a first engagement tooth (67) is provided on the outer circumference of the second external spline engagement gear ring (66), and an F6 one-way clutch outer raceway (68) is provided on the inner circumference of the first external spline engagement gear ring (66).

[0042] The working process of this invention:

[0043] When the vehicle is in motion, the spline end of the first half-shaft (19) is installed in the first half-shaft spline hole (16) of the first planetary carrier (15), and the first drive wheel is installed at the other end of the first half-shaft (19). The spline end of the second half-shaft (29) is installed in the second half-shaft spline hole (26) of the second planetary carrier (25), and the second drive wheel is installed at the other end of the second half-shaft (29).

[0044] 1. When the vehicle is moving forward in a low gear;

[0045] The engaging sleeve of the first synchronizer assembly (51) is on the right and does not engage with the first external spline engaging gear ring (56); the engaging sleeve of the second synchronizer assembly (61) is on the left and does not engage with the first external spline engaging gear ring (66). Brakes B1 and B3 are in a braking state, and brakes B2 and B4 are in a non-braking state; the outer rings of the F1 one-way clutch and the F3 one-way clutch are fixed, so that the first gear ring (12) and the second gear ring (22) can rotate clockwise past the outer rings of the F1 one-way clutch and the F3 one-way clutch, but cannot rotate counterclockwise past the outer rings of the F1 one-way clutch and the F3 one-way clutch; while the outer rings of the F2 one-way clutch and the F4 one-way clutch are not fixed, so that the rotation of the first gear ring (12) and the second gear ring (22) is not restricted by the outer rings of the F2 one-way clutch and the F4 one-way clutch. When the driving member (3) rotates clockwise (1) to output driving force, the driving member (3) drives the first sun gear shaft (50) and the second sun gear shaft (60) connected on both sides to rotate the first sun gear (10) and the second sun gear (20) clockwise (1) at a speed of N1. When the first sun gear (10) rotates clockwise (1) at a speed of N1, if the first planetary carrier (15) remains stationary, each gear of the first set of planetary gears (13) rotates counterclockwise around the first set of planetary gear shaft (17) at a speed of n1, while attempting to make the first gear ring (12) rotate counterclockwise; however, the first gear ring (12) can no longer rotate counterclockwise, so that each gear of the first set of planetary gears (13) can only revolve clockwise around the first sun gear (10) at a speed of Nn1. Therefore, the first set of planetary gears (13) drives the first planetary carrier (15) to rotate clockwise (1) at a speed of Nn1; the first half-shaft spline hole (16) in the first planetary carrier (15) drives the first half-shaft (19) and the first drive wheel to rotate clockwise at a speed of Nn1, thereby driving the vehicle forward. If the first sun gear (10) is still rotating clockwise at a speed of N1, and the first drive wheel drives the first half shaft (19) and the first planet carrier (15) to rotate clockwise at a speed exceeding Nn1 (1), then the gears of the first set of planetary gears (13) will rotate clockwise around the first set of planetary gear shaft (17), and then the gears of the first set of planetary gears (13) will drive the first gear ring (12) to rotate clockwise beyond the outer ring of the F1 one-way clutch.Meanwhile, when the second sun gear (20) rotates clockwise (1) at a speed of N1, if the second planetary carrier (25) remains stationary, each gear of the second set of planetary gears (23) rotates counterclockwise around the second set of planetary gear shaft (27) at a speed of n1, while attempting to make the second ring gear (22) rotate counterclockwise; however, the second ring gear (22) can no longer rotate counterclockwise, so that each gear of the second set of planetary gears (23) can only revolve clockwise around the second sun gear (20) at a speed of Nn1. Therefore, the second set of planetary gears (23) drives the second row of gear carriers (25) to rotate clockwise (1) at a speed of Nn1; the second half-shaft spline hole (26) in the second row of gear carriers (25) drives the second half-shaft (29) and the second drive wheel to rotate clockwise at a speed of Nn1, thereby driving the vehicle forward. If the second sun gear (20) is still rotating clockwise at the speed of N1, and the second drive wheel drives the second half shaft (29) and the second gear carrier (25) to rotate clockwise (1) at a speed exceeding Nn1, then the gears of the second set of planetary gears (23) will rotate clockwise around the second set of planetary gear shaft (27), and then the gears of the second set of planetary gears (23) will drive the second gear ring (22) to rotate clockwise beyond the outer ring of the F3 one-way clutch.

[0046] 2. When the vehicle is in a high gear and moving forward:

[0047] The engagement sleeve of the first synchronizer assembly (51) moves to the left, so that the inner spline gear ring of the engagement sleeve of the first synchronizer assembly (51) is simultaneously engaged with the spline hub of the first synchronizer assembly (51) and the first outer spline engagement gear ring (56); the engagement sleeve of the second synchronizer assembly (61) moves to the right, so that the inner spline gear ring of the engagement sleeve of the second synchronizer assembly (61) is simultaneously engaged with the spline hub of the first synchronizer assembly (51) and the first outer spline engagement gear ring (56). Brakes B1 and B3 are in a braking state, while brakes B2 and B4 are in a non-braking state. The outer rings of one-way clutches F1 and F3 are fixed, so that the first gear ring (12) and the second gear ring (22) can rotate clockwise past the outer rings of one-way clutches F1 and F3, but cannot rotate counterclockwise past the outer rings of one-way clutches F1 and F3. The outer rings of one-way clutches F2 and F4 are not fixed, so that the rotation of the first gear ring (12) and the second gear ring (22) is not restricted by the outer rings of one-way clutches F2 and F4. When the driving member (3) rotates clockwise (1) to output driving force, the driving member (3) drives the first sun gear shaft (50) and the second sun gear shaft (60) connected on both sides to rotate the F5 one-way clutch and the F6 one-way clutch clockwise (1). When the F5 one-way clutch rotates clockwise (1) at a speed of N1, the F5 one-way clutch drives the engagement sleeve of the first synchronizer assembly (51) to rotate clockwise (1) at a speed of N1 through the first external spline engagement gear ring (56). The engagement sleeve of the first synchronizer assembly (51) then drives the first synchronizer assembly (51) to rotate clockwise (1). The splined hub and the first splined connecting plate (55) rotate clockwise (1) at a speed of N1. The first splined connecting plate (55) then drives the first planetary carrier (15) to rotate clockwise (1) at a speed of N1 through the first set of transmission pins (53). The first half-shaft spline hole (16) in the first planetary carrier (15) drives the first half-shaft (19) and the first drive wheel to rotate clockwise at a speed of N1, thereby driving the vehicle forward. The gear of the first set of planetary gears (13) drives the first gear ring (12) to rotate clockwise past the outer ring of the F1 one-way clutch.If the first sun gear shaft (50) is still rotating clockwise (1) at the speed of N1, and the first drive wheel drives the first half shaft (19), the first planetary carrier (15), the first spline connecting disc (55), the first synchronizer assembly (51), and the first external spline engagement gear ring (56) to rotate clockwise (1) at a speed exceeding N1, then the first external spline engagement gear ring (56) will rotate beyond the first sun gear shaft (50); and the gears of the first set of planetary gears (13) will rotate clockwise around the first set of planetary gear shaft (17), and then the gears of the first set of planetary gears (13) will drive the first gear ring (12) to rotate clockwise beyond the outer ring of the F1 one-way clutch. At the same time, when the F6 one-way clutch rotates clockwise (1) at a speed of N1, the F6 one-way clutch drives the engagement sleeve of the second synchronizer assembly (61) to rotate clockwise (1) at a speed of N1 through the second external spline engagement ring (66). The engagement sleeve of the second synchronizer assembly (61) then drives the spline hub of the second synchronizer assembly (61) and the second spline connecting disc (65) to rotate clockwise (1) at a speed of N1. The second spline connecting disc (65) then drives the second planetary carrier (25) to rotate clockwise (1) at a speed of N1 through the second set of transmission pins (63). The second half-shaft spline hole (26) in the second planetary carrier (25) drives the second half-shaft (29) and the second drive wheel to rotate clockwise at a speed of N1, thereby driving the vehicle forward. The gear of the second set of planetary gears (23) drives the second gear ring (22) to rotate clockwise past the outer ring of the F3 one-way clutch. If the second sun gear shaft (60) is still rotating clockwise (1) at the speed of N1, and the second drive wheel drives the second half shaft (29), the second planetary carrier (25), the second spline connecting disc (65), the second synchronizer assembly (61), and the second external spline engagement gear ring (66) to rotate clockwise (1) at a speed exceeding N1, then the second external spline engagement gear ring (66) will rotate beyond the second sun gear shaft (60); and the gears of the second set of planetary gears (23) will rotate clockwise around the second set of planetary gear shaft (27), and then the gears of the second set of planetary gears (23) will drive the second gear ring (22) to rotate clockwise beyond the outer ring of the F3 one-way clutch.

[0048] 3. When the vehicle is moving backward:

[0049] The engaging sleeve of the first synchronizer assembly (51) is on the right and does not engage with the first external spline engaging gear ring (56); the engaging sleeve of the second synchronizer assembly (61) is on the left and does not engage with the first external spline engaging gear ring (66). Brakes B2 and B4 are in a braking state, and brakes B1 and B3 are in a non-braking state; the outer rings of the one-way clutches F2 and F4 are fixed, so that the first gear ring (12) and the second gear ring (22) can rotate counterclockwise past the outer rings of the one-way clutches F2 and F4, but cannot rotate clockwise past the outer rings of the one-way clutches F2 and F4. The outer rings of the one-way clutches F1 and F3 are not fixed, so that the first gear ring (12) and the second gear ring (22) can rotate without being restricted by the outer rings of the one-way clutches F1 and F3. When the driving member (3) rotates counterclockwise (2) to output driving force, the driving member (3) drives the first sun gear shaft (50) and the second sun gear shaft (60) connected on both sides to rotate the first sun gear (10) and the second sun gear (20) counterclockwise (2) at a speed of N2. When the first sun gear (10) rotates counterclockwise at a speed of N2, if the first planet carrier (15) does not move, each gear of the first set of planetary gears (13) rotates clockwise around the first set of planetary gear shaft (17) at a speed of n2, while attempting to make the first gear ring... (12) Rotate clockwise; however, the first gear ring (12) can no longer rotate clockwise, so that each gear of the first set of planetary gears (13) can only revolve around the first sun gear (10) at a speed of Nn2 in a counterclockwise direction. Therefore, the first set of planetary gears (13) drives the first planetary carrier (15) to rotate counterclockwise (2) at a speed of Nn2; so that the first half-shaft spline hole (16) in the first planetary carrier (15) drives the first half-shaft (19) and the first drive wheel to rotate counterclockwise at a speed of Nn2, thereby driving the vehicle to move backward. If the first sun gear (10) is still rotating counterclockwise at a speed of N2, and the first drive wheel drives the first half shaft (19) and the first planet carrier (15) to rotate counterclockwise at a speed exceeding Nn2 (2), then the gears of the first set of planetary gears (13) will rotate counterclockwise around the first set of planetary gear shaft (17), and then the gears of the first set of planetary gears (13) will drive the first gear ring (12) to rotate counterclockwise beyond the outer ring of the F2 one-way clutch.Meanwhile, when the second sun gear (20) rotates counterclockwise at a speed of N2, if the second planetary carrier (25) remains stationary, each gear of the second set of planetary gears (23) rotates clockwise around the second set of planetary gear shaft (27) at a speed of n2, while attempting to make the second ring gear (22) rotate clockwise; however, the second ring gear (22) can no longer rotate clockwise, so that each gear of the second set of planetary gears (23) can only revolve counterclockwise around the second sun gear (20) at a speed of Nn2. Therefore, the second set of planetary gears (23) drives the second planetary carrier (25) to rotate counterclockwise at a speed of Nn2 (2); causing the first half-shaft spline hole (26) in the second planetary carrier (25) to drive the second half-shaft (29) and the second drive wheel to rotate counterclockwise at a speed of Nn2, thereby driving the vehicle to move backward. If the second sun gear (20) is still rotating counterclockwise at a speed of N2, and the second drive wheel drives the second half shaft (29) and the second planetary carrier (25) to rotate counterclockwise at a speed exceeding Nn2 (2), then the gears of the second set of planetary gears (23) will be driven to rotate counterclockwise around the second set of planetary gear shaft (27), and then the gears of the second set of planetary gears (23) will drive the second gear ring (22) to rotate counterclockwise beyond the outer ring of the F4 one-way clutch.

Claims

1. A high-low range transfer mechanism, which is composed of a driving member, a first half shaft, a first transfer mechanism shell, a B1 brake, a B2 brake, a F1 one-way clutch, a F2 one-way clutch, a F5 one-way clutch, a first synchronizer, a first ring gear, a first planet carrier, a first set of planetary gears, a first sun gear, a second half shaft, a second transfer mechanism shell, a B3 brake, a B4 brake, a F3 one-way clutch, a F4 one-way clutch, a F6 one-way clutch, a second synchronizer, a second ring gear, a second planet carrier, a second set of planetary gears, a second sun gear; characterized in that: The roller assembly of the F5 one-way clutch is installed on the F5 inner raceway provided on the first sun gear shaft; the first set of transmission pins are installed in the first set of transmission pin holes provided on the first spline connection disc; the first synchronizer assembly is installed on the first outer spline provided on the first spline connection disc; when the engagement sleeve of the first synchronizer assembly moves axially to the left, the inner spline ring gear of the engagement sleeve of the first synchronizer assembly can be engaged with the first outer spline engagement ring gear.

2. The high-low range transfer case of claim 1, wherein: The first sun gear shaft is provided with an F5 inner raceway.

3. The high-low range transfer case of claim 1, wherein: The inner circumferential surface of the first outer spline engagement ring gear is an outer raceway of the F5 roller assembly.

4. The high-low range transfer case of claim 1, wherein: The first spline connection disc is provided with the first set of transmission pin holes, the first outer spline, and a circular hole coaxial with the first sun gear shaft.

Images