Coaxial difference reduction lock integrated mechanism

Abstract

The utility model discloses a difference reduction lock integrated mechanism suitable for being coaxial. The difference reduction lock integrated mechanism comprises a speed reduction planetary mechanism, a differential planetary mechanism and a differential lock sliding sleeve. The speed reduction planetary mechanism comprises a planet carrier, a long half shaft is rotatably arranged in the planet carrier, the upper portion of the long half shaft is sleeved with an output shaft, and a first differential mechanism planet wheel, a second differential mechanism planet wheel, a first differential mechanism half shaft gear and a second differential mechanism half shaft gear are adopted in the aspects of coaxial power input and differential output functions. Wherein the first differential mechanism planet wheel and the second differential mechanism planet wheel are meshed with each other and are respectively meshed with respective differential mechanism half axle gears, so that the functions of power input from a planet carrier, revolution and rotation of the first differential mechanism planet wheel and the second differential mechanism planet wheel and differential output of the half axle gears are realized; the basic functions of the differential mechanism are met, the coaxial differential output function is achieved, and the technical problem that in the prior art, the same mechanism cannot have the functions of speed reduction, torque increasing, differential driving and locking at the same time is solved.

Description

Technical Field

[0001] The utility model belongs to the field of electric vehicles, and specifically relates to a differential lock integrated mechanism applicable to a coaxial structure. Background Art

[0002] In the field of commercial vehicle drive trains, whether it is the traditional technical route or various new energy technical routes, the drive functions to be achieved are the same, including speed reduction and torque increase, differential drive, and locking functions. In a typical drive train, a reduction system, a differential, and a differential lock device exist independently, which can meet the basic functional requirements. However, with the development of new energy technologies, as one of the technical routes, the coaxial electric drive axle has obvious spatial dimension advantages in vehicle layout; but the change in the drive direction and position poses higher technical requirements for the compactness and high integration of the drive train structure design in a narrow axial space. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present utility model is to provide a differential lock integrated mechanism applicable to a coaxial structure, so as to solve the technical problem that the same mechanism in the prior art cannot simultaneously have the functions of speed reduction and torque increase, differential drive, and locking.

[0004] To solve the above technical problems, the present utility model is implemented by adopting the following technical solutions:

[0005] A differential lock integrated mechanism applicable to a coaxial structure includes a reduction planetary mechanism, a differential planetary mechanism, and a differential lock sliding sleeve;

[0006] The reduction planetary mechanism includes a planet carrier, in which a long half shaft is rotatably arranged. An output shaft is sleeved on the upper part of the long half shaft. The upper and lower parts of the output shaft are spline-connected with a sun gear sleeved thereon. The upper half of the sun gear is sleeved with a reduction system cover plate, and the reduction system cover plate contacts the top of the planet carrier; a sun gear support bearing is arranged on the top of the sun gear, a first limit snap ring is sleeved on the outer wall of the sun gear support bearing, and a second limit snap ring is sleeved on the top of the sun gear; three reduction system planetary shafts are evenly arranged circumferentially between the planet carrier and the lower half of the sun gear. A reduction system planetary gear is loosely sleeved on each reduction system planetary shaft. The lower part of the long half shaft extends out of the planet carrier and then extends into the differential planetary mechanism;

[0007] The differential planetary mechanism includes a differential cover plate fixedly connected to the planet carrier. A lower portion of the long half shaft extending from the planet carrier is sleeved with a first differential half shaft gear. A short half shaft coaxial with the long half shaft is arranged in the middle of the differential cover plate. A second differential half shaft gear is arranged on the short half shaft. Thrust bearings are arranged between the upper end face of the first differential half shaft gear and the planet carrier, between the second differential half shaft gear and the differential cover plate, and between the contact surfaces of the first differential half shaft gear and the second differential half shaft gear.

[0008] A second support bearing is arranged on the outer side of the bottom of the differential cover plate. Three pairs of planet wheel shafts are evenly arranged along the circumference on the top of the differential cover plate. A first differential planet wheel and a second differential planet wheel are respectively arranged on each pair of planet wheel shafts. Thrust bearings are arranged at both ends of the first differential planet wheel and the second differential planet wheel.

[0009] A differential lock sliding sleeve is commonly arranged outside the first differential planet wheel and the second differential planet wheel. The differential lock sliding sleeve is connected to the outside.

[0010] The utility model further includes the following technical features:

[0011] A reduction system planet wheel bearing is arranged between the reduction system planet shaft and the reduction system planet wheel.

[0012] A first support bearing is arranged on the outer side of the top of the reduction system cover plate.

[0013] An oil hole is arranged on the planet shaft.

[0014] The differential cover plate and the planet carrier are fixedly connected by a cylindrical pin and a bolt.

[0015] The reduction system cover plate and the planet carrier are fixedly connected by a positioning pin and a bolt.

[0016] A ring gear is arranged outside the planet carrier. Rectangular teeth are arranged on the outer wall of the ring gear. The ring gear meshes with the external axle housing.

[0017] A limiting boss is arranged at the bottom of the planet carrier.

[0018] Compared with the prior art, the beneficial technical effects of the utility model are:

[0019] (Ⅰ) In terms of the coaxial power input and differential output functions, a first differential planet gear, a second differential planet gear, a first differential side gear, and a second differential side gear are adopted. Among them, the first differential planet gear and the second differential planet gear mesh with each other and respectively mesh with their respective differential side gears, realizing the power input from the planet carrier. The first differential planet gear and the second differential planet gear revolve and rotate, and the differential output function of the side gears is achieved. It not only meets the basic function of the differential but also realizes the coaxial differential output function, solving the technical problem that the same mechanism in the prior art cannot simultaneously have the functions of speed reduction and torque increase, differential drive, and locking.

[0020] (Ⅱ) In terms of the differential locking function, a differential lock sliding sleeve is adopted to synchronize the first differential planet gear and the second differential planet gear. That is, when the differential lock works, the differential lock sliding sleeve meshes with the first differential planet gear and the second differential planet gear of the differential at the same time, making the differential lose its differential function, and the same torque can be obtained on both wheels, avoiding power transmission problems caused by one wheel slipping.

[0021] (Ⅲ) The present utility model designs a structure integrating the functions of speed reduction and torque increase, differential, and differential locking, which has the characteristics of compact structure, high integration, high transmission efficiency, and high reliability, greatly reducing the space size and being applicable to the field of coaxial electric drive axles. Description of the Drawings

[0022] Figure 1 is the assembly structure schematic diagram of the present utility model;

[0023] Figure 2 is the assembly structure schematic diagram of the present utility model;

[0024] Figure 3 is Figure 2 the schematic diagram of the C-C view in

[0025] Figure 4 is Figure 2 the A-A view in

[0026] Figure 5 is Figure 2 the free state B-B view in

[0027] Figure 6 is Figure 2 the locked state B-B view in

[0028] Figure 7 is the structural schematic diagram of the planet carrier in the present utility model;

[0029] Figure 8 is the structural schematic diagram of the differential cover in the present utility model.

[0030] The meanings of the reference numerals in the figure are as follows: the first differential planetary gear 1, the second differential planetary gear 2, the planetary gear shaft 3, the bolt 4, the differential lock sliding sleeve 5, the second differential half shaft gear 6, the positioning pin 7, the reduction planetary shaft 8, the reduction planetary gear 9, the reduction planetary gear bearing 10, the oil hole 11, the cylindrical pin 12, the first limit retaining ring 13, the second limit retaining ring 14, the output shaft 15, the long half shaft 16, the reduction system cover plate 17, the first support bearing 18, the sun gear support bearing 19, the planetary carrier 20, the ring gear 21, the thrust bearing 22, the first differential half shaft gear 23, the thrust bearing 24, the sun gear 25, the differential cover plate 26, the second support bearing 27, the short half shaft 28, the limit boss 29, the rectangular tooth 30;

[0031] The positioning holes 12-1, the positioning holes 12-2, the bolt holes 4-1, the bolt holes 4-2.

[0032] The following further elaborates on the specific content of the present utility model in conjunction with the embodiments. Specific embodiments

[0033] It should be noted that all the components in the present utility model, without special instructions, are components known in the art.

[0034] The following gives specific embodiments of the present utility model. It should be noted that the present utility model is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solutions of this application fall within the protection scope of the present utility model.

[0035] The present utility model provides a coaxial reduction and differential lock integrated mechanism, including a reduction planetary mechanism, a differential planetary mechanism, and a differential lock sliding sleeve 5;

[0036] The reduction planetary mechanism includes a planetary carrier 20. A long half shaft 16 is rotatably arranged in the planetary carrier 20. An output shaft 15 is sleeved on the upper part of the long half shaft 16. The upper and lower parts of the output shaft 15 are spline-connected with a sun gear 25 sleeved thereon. A reduction system cover plate 17 is sleeved on the upper half of the sun gear 25. The reduction system cover plate 17 contacts the top of the planetary carrier 20. A sun gear support bearing 19 is arranged on the top of the sun gear 25. A first limit retaining ring 13 is sleeved on the outer wall of the sun gear support bearing 19. A second limit retaining ring 14 is sleeved on the top of the sun gear 25. Three reduction planetary shafts 8 are evenly arranged circumferentially between the lower half of the planetary carrier 20 and the sun gear 25. Each reduction planetary shaft 8 is sleeved with a reduction planetary gear 9 in a loose fit. The lower part of the long half shaft 16 extends out of the planetary carrier 20 and then extends into the differential planetary mechanism;

[0037] The differential planetary mechanism includes a differential cover plate 26 fixedly connected to the planet carrier 20. A lower portion of the long half shaft 16 extending out of the planet carrier 20 is sleeved with a first differential half shaft gear 23. A short half shaft 28 coaxial with the long half shaft 16 is arranged in the middle of the differential cover plate 26. A second differential half shaft gear 6 is arranged on the short half shaft 28. Thrust bearings 24 are arranged between the upper end face of the first differential half shaft gear 23 and the planet carrier 20, between the second differential half shaft gear 6 and the differential cover plate 26, and between the contact surfaces of the first differential half shaft gear 23 and the second differential half shaft gear 6.

[0038] A second support bearing 27 is arranged on the outer side of the bottom of the differential cover plate 26. Three pairs of planet wheel shafts 3 are evenly arranged along the circumference on the top of the differential cover plate 26. A first differential planet wheel 1 and a second differential planet wheel 2 are respectively arranged on each pair of planet wheel shafts 3. Thrust bearings 22 are arranged at both ends of the first differential planet wheel 1 and the second differential planet wheel 2.

[0039] A differential lock sliding sleeve 5 is jointly arranged outside the first differential planet wheel 1 and the second differential planet wheel 2. The differential lock sliding sleeve 5 is connected to the outside.

[0040] In the above technical solution, the planet carrier 20 serves as the power input, driving the first differential planet wheel 1 and the second differential planet wheel 2 to revolve, and respectively transmitting the power to the long half shaft 16 and the short half shaft 28 through the first differential half shaft gear 23 and the second differential half shaft gear 6.

[0041] When there is a rotational speed difference between the wheels on both sides of the long half shaft 16 and the short half shaft 28, the first differential planet wheel 1 and the second differential planet wheel 2 mesh with each other and rotate around their respective corresponding planet wheel shafts 3. And the rotation directions of the two groups of planet wheels are opposite and the rotational speeds are the same, realizing the differential function.

[0042] In the non-working state of the differential lock, the differential lock sliding sleeve 5 meshes with the first differential planet wheel 1 and keeps non-contact with the second differential planet wheel 2, as Figure 5 shown; at this time, when the differential is working normally, the differential lock sliding sleeve 5 rotates freely with the first differential planet wheel 1 without affecting the operation of the differential. When the differential lock activates the locking function, that is, driving the differential lock sliding sleeve 5 to move towards the second differential planet wheel 2 until it fully meshes with the first differential planet wheel 1 and the second differential planet wheel 2, as Figure 2 and 6 shown. At this time, the first differential planet wheel 1 and the second differential planet wheel 2 are simultaneously meshed with the differential lock sliding sleeve 5, and the opposite-direction self-rotation of the first differential planet wheel 1 and the second differential planet wheel 2 cannot be realized, that is, locking the differential to realize the differential lock function.

[0043] Among them, the thrust bearing 22 is used to bear the axial forces of the first differential planetary gear 1 and the second differential planetary gear 2, and the thrust bearing 24 is used to axially position the first differential side gear 23 and the second differential side gear 6.

[0044] In terms of the coaxial power input and differential output functions, the first differential planetary gear 1, the second differential planetary gear 2, the first differential side gear 23, and the second differential side gear 6 are adopted; among them, the first differential planetary gear 1 and the second differential planetary gear 2 mesh with each other and respectively mesh with their respective differential side gears, realizing the power input from the planet carrier, the revolution and rotation of the first differential planetary gear 1 and the second differential planetary gear, and the differential output function of the side gears; it not only meets the basic functions of the differential, but also realizes the coaxial differential output function, solving the technical problem that the same mechanism in the prior art cannot simultaneously have the functions of speed reduction and torque increase, differential drive, and locking.

[0045] In terms of the differential locking function, a differential lock sliding sleeve is adopted to synchronize the first differential planetary gear 1 and the second differential planetary gear 2. That is, when the differential lock works, the differential lock sliding sleeve meshes with the first differential planetary gear 1 and the second differential planetary gear 2 of the differential at the same time, making the differential lose its differential function, and the same torque can be obtained on both wheels, avoiding power transmission problems caused by one wheel slipping.

[0046] This solution designs a structure integrating the functions of speed reduction and torque increase, differential, and differential locking, which has the characteristics of compact structure, high integration, high transmission efficiency, and high reliability, greatly reducing the space size and being applicable to the field of coaxial electric drive axles.

[0047] Specifically, a reduction system planetary gear bearing 10 is arranged between the reduction system planetary shaft 8 and the reduction system planetary gear 9.

[0048] Specifically, a first support bearing 18 is arranged on the outer side of the top of the reduction system cover plate 17.

[0049] In the above technical solution, the first support bearing 18 is used to be connected to the outside.

[0050] Specifically, an oil hole 11 is provided on the planetary shaft 8.

[0051] In the above technical solution, the oil hole 11 is provided for lubricating the planetary shaft 8.

[0052] Specifically, the differential cover plate 26 and the planet carrier 20 are fixedly connected by a cylindrical pin 12 and a bolt 4.

[0053] Preferably, Figure 7 and Figure 8 the 12-1 and 12-2 on it are the corresponding positioning holes of the cylindrical pin 12, and the 4-1 and 4-2 are the corresponding bolt holes of the bolt 4.

[0054] Specifically, the reduction system cover plate 17 and the planet carrier 20 are fixedly connected by a positioning pin 7 and bolts.

[0055] In the above technical solution, the connection manner between the reduction system cover plate 17 and the planet carrier 20 is the same as that between the differential cover plate 26 and the planet carrier 20.

[0056] Specifically, a ring gear 21 is arranged outside the planet carrier 20, rectangular teeth 30 are arranged on the outer wall of the ring gear 21, and the ring gear 21 meshes with the external axle housing.

[0057] In the above technical solution, the rectangular teeth 30 realize the fixation of the ring gear 21, the input of the sun gear 25, and the output of the planet carrier 20.

[0058] Specifically, a limiting boss 29 is arranged at the bottom of the planet carrier 20.

[0059] In the above technical solution, the limiting boss 29 is used for axially limiting the first differential planet gear 1 and the second differential planet gear 2.

Claims

1. A coaxial differential lock integrated mechanism, characterized in that: It includes a speed reduction planetary mechanism, a differential planetary mechanism and a differential lock sleeve (5); The deceleration planetary mechanism comprises a planet carrier (20), a long semi-shaft (16) is rotatably arranged in the planet carrier (20), an output shaft (15) is sleeved on the upper part of the long semi-shaft (16), the upper and lower parts of the output shaft (15) are spline-connected with a sun gear (25) sleeved thereon, the upper half of the sun gear (25) is sleeved with a deceleration system cover plate (17), the deceleration system cover plate (17) is in contact with the top of the planet carrier (20); a sun gear support bearing (17) is arranged on the top of the sun gear (25) 9), a first limiting snap ring (13) is sleeved on the outer wall of the sun gear support bearing (19), and a second limiting snap ring (14) is sleeved on the top of the sun gear (25); three reduction system planetary shafts (8) are evenly arranged along the circumferential direction between the planet carrier (20) and the lower half of the sun gear (25), and a reduction system planetary gear (9) is hollowly sleeved on each of the reduction system planetary shafts (8); the lower part of the long semi-shaft (16) extends out of the planet carrier (20) and then extends into the differential planetary mechanism; The differential planetary mechanism comprises a differential cover plate (26) fixedly connected to the planet carrier (20); a first differential axle gear (23) is sleeved on the lower part of the long axle (16) extending out of the planet carrier (20); a short axle (28) coaxial with the long axle (16) is arranged in the middle of the differential cover plate (26); a second differential axle gear (6) is arranged on the short axle (28); a thrust bearing (24) is arranged between the upper end surface of the first differential axle gear (23) and the planet carrier (20), between the second differential axle gear (6) and the differential cover plate (26), and between the contact surfaces of the first differential axle gear (23) and the second differential axle gear (6); A second support bearing (27) is arranged on the outer side of the bottom of the differential cover plate (26); three pairs of planetary gear shafts (3) are evenly arranged along the circumferential direction on the top of the differential cover plate (26); a first differential planetary gear (1) and a second differential planetary gear (2) are arranged on each pair of planetary gear shafts (3); thrust bearings (22) are arranged at both ends of the first differential planetary gear (1) and the second differential planetary gear (2); A differential lock sleeve (5) is commonly arranged outside the first differential planetary gear (1) and the second differential planetary gear (2), and the differential lock sleeve (5) is connected to the outside.

2. The coaxial differential lock integrated mechanism as claimed in claim 1, characterized in that: A reduction system planetary wheel bearing (10) is provided between the reduction system planetary shaft (8) and the reduction system planetary wheel (9).

3. The coaxial differential lock integrated mechanism as claimed in claim 1, characterized in that: A first support bearing (18) is arranged on the outer side of the top of the speed reduction system cover plate (17).

4. The coaxial differential lock integrated mechanism as claimed in claim 1, characterized in that: The planetary shaft (8) is provided with an oil hole (11).

5. The coaxial differential lock integrated mechanism as claimed in claim 1, characterized in that: The differential cover plate (26) is fixedly connected to the planet carrier (20) via a cylindrical pin (12) and a bolt (4).

6. The coaxial differential lock integrated mechanism as claimed in claim 1, characterized in that: The speed reduction system cover plate (17) and the planet carrier (20) are fixedly connected via positioning pins (7) and bolts.

7. The coaxial differential lock integrated mechanism as claimed in claim 1, characterized in that: A gear ring (21) is arranged outside the planet carrier (20), rectangular teeth (30) are arranged on the outer wall of the gear ring (21), and the gear ring (21) is meshed with an external bridge housing.

8. The coaxial differential lock integrated mechanism as claimed in claim 1, characterized in that: A limiting boss (29) is provided at the bottom of the planet carrier (20).

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