Dual Clutch Multi-Speed Reducer

Abstract

The present invention relates to the technical field of speed reducers, and specifically discloses a dual clutch multi-speed reducer, which includes a housing, a fixing rod and a fixing sleeve. The fixing sleeve is sleeved on a partial area outside the fixing rod. An installation sleeve is fixedly connected to the outer surfaces of the fixing rod and the fixing sleeve. The installation sleeve is movably connected to a synchronizing sleeve through a driving part. Gears three and four are rotatably connected to the outer surfaces of the fixing rod and the fixing sleeve. By providing a synchronizing component, the pressing seat is stretched by a metal sheet, so that the friction force between the pressing seat and the tapered sleeve can be effectively increased. Enough friction force can drive gear three to rotate instantly when the pressing seat contacts the tapered sleeve. It can not only effectively shorten the delay in the gear shift process of the gear set, but also improve the gear shift accuracy and reduce the jerks during the gear shift of the multi-stage transmission. At the same time, the smoothness during the gear shift can be further improved by the temperature change inside the speed reducer.

Description

Technical Field

[0001] The present invention relates to the technical field of speed reducers, and more particularly to a dual-clutch multi-speed reducer. Background Art

[0002] A dual-clutch multi-speed reducer is an advanced mechanical transmission device with unique structural and performance characteristics. It includes two independent clutches, which are respectively responsible for controlling the shifting of odd and even gears, making the shifting process faster and smoother, and reducing the power interruption time. The dual-clutch multi-speed reducer is widely used in the power system of new energy vehicles due to its unique structural characteristics, efficient working principle, and significant performance advantages;

[0003] During the driving process of some new energy vehicles equipped with a dual-clutch multi-speed reducer, under complex road conditions such as vehicle start, low-speed driving, and frequent acceleration and deceleration, the computer is difficult to accurately predict the driver's intention, resulting in inaccurate shifting timing or delays during the shifting process, and thus generating a sense of jerk; moreover, the fast upshifting speed of the dual-clutch transmission is achieved by pre-shifting into the next higher gear, but downshifting requires first disengaging the higher gear and then shifting into the lower gear. When the engine is in a high-speed state and suddenly shifts into a lower gear, it is easy to occur jerks, affecting the driving smoothness and riding comfort. Summary of the Invention

[0004] The purpose of the present invention is to provide a vehicle dual-clutch multi-speed reducer, which can effectively shorten the delay during the shifting process of the gear set, improve the shifting accuracy, and reduce the sense of jerk during the shifting of the multi-stage transmission, so as to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A dual-clutch multi-speed reducer includes a housing, a fixed rod, and a fixed sleeve. The fixed sleeve is sleeved on the outer side of a partial region of the fixed rod. An installation sleeve is fixedly connected to the outer surfaces of the fixed rod and the fixed sleeve. The installation sleeve is movably connected with a synchronizing sleeve through a driving part. Gears three and four are rotatably connected to the outer surfaces of the fixed rod and the fixed sleeve. A synchronizing component is arranged on the outer side of the fixed sleeve;

[0006] Gears three and four are distributed at both ends of the fixed sleeve. The synchronizing component includes installation grooves formed on the outer surfaces of gears three and four. A tapered sleeve is fixedly connected to the inner surface of the installation groove. An activity groove is formed on the lower end of the inner surface of the synchronizing sleeve. A pressing seat is slidably connected to the inner surface of the activity groove. A cavity is embedded on the inner side of the pressing seat. A metal sheet is arranged on the inner side of the cavity. The synchronizing component is used to drive one of the gears three and four to rotate.

[0007] Preferably, the outer surface of the extrusion seat is in sliding contact with the tapered sleeve. The pitch circle diameters of the third gear and the fourth gear are different. The movable groove and the extrusion seat are both annular. The extrusion seat is made of an elastic wear-resistant material. The outer surface of the extrusion seat is arc-shaped on the side close to the tapered sleeve. The metal sheet is in a U-shaped structure and is made of a thermal expansion material.

[0008] Preferably, a protective cover is fixedly connected to the outer surface of the front end of the housing. A switching assembly is arranged inside the protective cover. The switching assembly includes a connecting pipe fixedly connected to the outer surface of the front end of the housing. The front end of the connecting pipe is rotatably connected to a first clutch. A second clutch is arranged inside the first clutch.

[0009] Preferably, a first drive rod is fixedly connected to the outer side of the first clutch. The first clutch is connected to a fixed sleeve. The second clutch is connected to a fixed rod. A cavity is embedded and opened inside the fixed rod. A hydraulic pipe is arranged on the outer side of the second clutch and penetrates into the cavity.

[0010] Preferably, a hydraulic pipe is arranged on the outer side of the first clutch and extends into the fixed sleeve. Mounting sleeves are fixedly connected to the outer surfaces of the fixed rod and the fixed sleeve. A sliding groove is opened on the outer surface of the mounting sleeve. A hydraulic actuator is slidably connected inside the sliding groove. One end of the hydraulic actuator is fixedly connected to the inner surface of the synchronizing sleeve and the other end is communicated with the hydraulic pipe. The switching assembly is used to drive the synchronizing sleeve to move back and forth.

[0011] Preferably, a clamping assembly is arranged on the outer side of the synchronizing sleeve. The clamping assembly includes second clamping blocks fixedly connected to the left and right ends of the outer surface of the synchronizing sleeve. A first clamping block is fixedly connected to the inner surface of the mounting groove. The number of the first clamping blocks and the second clamping blocks is several groups and they are distributed in an annular array. The first clamping blocks and the second clamping blocks are in clamping contact.

[0012] Preferably, an extrusion assembly is arranged inside the movable groove. The extrusion assembly includes a support plate fixedly connected to the upper outer surface of the extrusion seat. The support plate is arc-shaped. A receiving groove is embedded and opened on the outer surface of the first clamping block on the side close to the synchronizing sleeve. A magnetic block is fixedly connected inside the receiving groove. A magnetic ring is fixedly connected to the outer surface of the support plate on the side close to the first clamping block.

[0013] Preferably, an expansion assembly is arranged between the first clamping block and the second clamping block. The expansion assembly includes a through hole penetrating through the inner side of the second clamping block. A spring is arranged inside the through hole. Extrusion plates are symmetrically fixedly connected to the outer surface of the second clamping block. The extrusion plates are arc-shaped. The outer surface of the extrusion plates is in sliding contact with the first clamping block. The inner surfaces of the two extrusion plates are respectively fixedly connected to the two ends of the spring.

[0014] Preferably, the inner side of the shell is rotatably connected to a drive rod 2 through a bearing, and the drive rod 2 extends to the outside of the shell. The outer surface of the drive rod 2 is fixedly connected to gear 1 and gear 2, and the gear 1 and gear 3 are respectively meshed and connected with gear 3 and gear 4.

[0015] Preferably, the outer surface of the shell is provided with several groups of heat dissipation grooves, the clutch 1 and the clutch 2 are both located inside the shield, the number of the support plates is several groups and distributed in a ring array, and the support plates are made of elastic material.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This solution utilizes a synchronizer assembly to stretch the extrusion seat using a metal sheet, effectively increasing the friction between the extrusion seat and the tapered sleeve. This creates sufficient friction to drive gear three to rotate the instant the extrusion seat and tapered sleeve come into contact. This not only effectively reduces gear shifting delays, but also improves shifting accuracy and reduces jerking during multi-speed transmission shifts. Furthermore, the temperature change within the reducer further enhances shifting smoothness.

[0018] 2. This solution uses an extrusion assembly to gradually flip the support plate from a curved state to a straight shape under the action of magnetic attraction. The support plate pushes the extrusion seat downward, so that the lower end of the extrusion seat and the outer surface of the tapered sleeve fit more closely. This helps to further increase the friction between the extrusion seat and the tapered sleeve, thereby effectively reducing the probability of jerking during the speed reducer shifting process, thereby ensuring the speed reducer's shifting reliability.

[0019] 3. This solution provides an expansion assembly, so that the extrusion plate can contact the surface of block 1 more closely under the action of its own elastic force and the elastic force of the spring, thereby further improving the operational reliability of the synchronization assembly, helping to reduce the probability of tooth jumping between block 1 and block 2, and maintaining a fixed transmission speed ratio between the gear sets, thereby improving the stability of the vehicle during driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2Schematic diagram of the internal structure of the housing of the present invention;

[0023] Figure 3 Cross-sectional view of the overall structure of the present invention;

[0024] Figure 4 Schematic diagram of the expansion component structure of the present invention;

[0025] Figure 5 For the present invention Figure 4 Enlarged schematic diagram at position A in

[0026] Figure 6 For the present invention Figure 3 Enlarged schematic diagram at position B in

[0027] Figure 7 For the present invention Figure 3 Enlarged schematic diagram at position C in

[0028] Explanation of reference numerals:

[0029] 11. Housing; 12. Heat dissipation groove; 13. Protective cover; 14. First driving rod; 15. Second driving rod; 16. First gear; 17. Second gear; 18. Third gear; 19. Fourth gear; 20. Synchronous sleeve; 21. First clutch; 22. Second clutch; 23. Fixed rod; 24. Cavity; 25. Hydraulic pipe; 26. Fixed sleeve; 27. Installation groove; 28. First clamping block; 29. Storage groove; 30. Magnet; 31. Tapered sleeve; 32. Second clamping block; 33. Extrusion plate; 34. Movable groove; 35. Magnetic ring; 36. Support plate; 37. Extrusion seat; 38. Cavity; 40. Metal sheet; 41. Slide groove; 42. Hydraulic driver; 43. Installation sleeve; 44. Through hole; 45. Spring; 46. Connecting pipe. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0031] Please refer to Figures 1 to 7 , the present invention provides a technical solution:

[0032] Dual-clutch multi-speed reducer, including a housing 11, a fixed rod 23 and a fixed sleeve 26. The fixed sleeve 26 is sleeved on an outer part of the fixed rod 23. An installation sleeve 43 is fixedly connected to the outer surfaces of the fixed rod 23 and the fixed sleeve 26. The installation sleeve 43 is movably connected to a synchronizing sleeve 20 through a driving component. A third gear 18 and a fourth gear 19 are rotatably connected to the outer surfaces of the fixed rod 23 and the fixed sleeve 26. A synchronizing component is arranged outside the fixed sleeve 26.

[0033] The third gear 18 and the fourth gear 19 are distributed at two ends of the fixed sleeve 26. The synchronizing component includes installation grooves 27 opened on the outer surfaces of the third gear 18 and the fourth gear 19. A conical sleeve 31 is fixedly connected to the inner surface of the installation groove 27. A movable groove 34 is opened at the lower end of the inner surface of the synchronizing sleeve 20. A pressing seat 37 is slidably connected to the inner surface of the movable groove 34. The outer surface of the pressing seat 37 is in sliding contact with the conical sleeve 31. A cavity 38 is embeddedly opened on the inner side of the pressing seat 37. A metal sheet 40 is arranged inside the cavity 38. The synchronizing component is used to drive one of the third gear 18 and the fourth gear 19 to rotate.

[0034] The pitch circle diameters of the third gear 18 and the fourth gear 19 are different. The movable groove 34 and the pressing seat 37 are both annular. The pressing seat 37 is made of an elastic wear-resistant material. The outer surface of the pressing seat 37 is arc-shaped on the side close to the conical sleeve 31. The metal sheet 40 is in a U-shaped structure. The metal sheet 40 is made of a thermal expansion material.

[0035] By adopting the above technical solution, in complex road conditions such as when a new energy vehicle starts, travels at a low speed, and frequently accelerates and decelerates, it is difficult for the vehicle control system to accurately predict the driver's intention, resulting in inaccurate shift timing of the multi-stage reducer or delay during the shifting process, thereby generating a sense of jerk, which affects the driving smoothness and riding comfort. In order to improve the shift accuracy and reduce the delay during the shifting process, a synchronization component is provided. During operation, due to the different pitch circle diameters of gear three 18 and gear four 19, during the shifting operation, the fixed rod 23 or the fixed sleeve 26 will drive the mounting sleeve 43 on its surface to rotate. The mounting sleeve 43 slidably supports the synchronizing sleeve 20 through a driving component, so that the synchronizing sleeve 20 can slide along the axis direction of the surface of the mounting sleeve 43. The mounting grooves 27 formed on the surfaces of gear three 18 and gear four 19 are used to fixedly support the tapered sleeve 31. When the synchronizing sleeve 20 slides towards gear three 18, the synchronizing sleeve 20 will drive the extrusion seat 37 to move synchronously through the moving groove 34. After the synchronizing sleeve 20 and the extrusion seat 37 move for a period of time, the lower end of the extrusion seat 37 will contact the outer surface of the tapered sleeve 31. At this time, the synchronizing sleeve 20 drives gear three 18 to rotate synchronously through the frictional force between the extrusion seat 37 and the tapered sleeve 31, so that gear three 18 and the synchronizing sleeve 20 can rotate at the same speed, thereby enabling power to be transmitted between the fixed rod 23 and gear three 18;

[0036] The extrusion seat 37 is made of an elastic wear-resistant material, which can not only increase the frictional force between the extrusion seat 37 and the tapered sleeve 31, but also produce a certain degree of elastic deformation. The metal sheet 40 is formed by pressing two metal plates with different coefficients of thermal expansion, and the coefficient of thermal expansion of the inner metal plate is greater than that of the outer metal plate. The U-shaped structure of the metal sheet 40 will apply a certain pressure to the lower side of the extrusion seat 37 through the cavity 38. After the multi-speed reducer works for a period of time, the temperature inside it will gradually rise. At this time, the thermally expandable metal sheet 40 expands due to heat, and the thermal expansion speed of its inner metal plate will be greater than the coefficient of thermal expansion of the outer metal plate. At this time, the metal sheet 40 will gradually turn from a bent state to a straight state, so that the extrusion seat 37 can be stretched through the metal sheet 40, effectively increasing the frictional force between the extrusion seat 37 and the tapered sleeve 31. There will be enough frictional force to drive gear three 18 to rotate at the moment of contact between the extrusion seat 37 and the tapered sleeve 31, which can not only effectively shorten the delay during the gear shift process of the gear set, but also improve the shift accuracy and reduce the sense of jerk during the multi-stage transmission shift process. At the same time, after working for a period of time, the smoothness during the shift process can be further improved through the temperature change inside the reducer.

[0037] Specifically, such as Figure 3 And Figure 6As shown, the outer surface of the front end of the shell 11 is fixedly connected to the shield 13, and a switching component is provided on the inner side of the shield 13. The switching component includes a connecting pipe 46 fixedly connected to the outer surface of the front end of the shell 11, and the front end of the connecting pipe 46 is rotatably connected to the clutch 1 21, and the clutch 2 22 is provided on the inner side of the clutch 1 21.

[0038] The outer side of the clutch 1 21 is fixedly connected to the driving rod 14, the clutch 1 21 is connected to the fixed sleeve 26, the clutch 2 22 is connected to the fixed rod 23, and a cavity 24 is embedded in the inner side of the fixed rod 23. A hydraulic pipe 25 is provided on the outer side of the clutch 22 and passes through the interior of the cavity 24.

[0039] A hydraulic pipe 25 is provided on the outside of the clutch 21 and extends to the inside of the fixed sleeve 26. The outer surfaces of the fixed rod 23 and the fixed sleeve 26 are fixedly connected with a mounting sleeve 43. A slide groove 41 is provided on the outer surface of the mounting sleeve 43. A hydraulic driver 42 is slidably connected to the inside of the slide groove 41. One end of the hydraulic driver 42 is fixedly connected to the inner surface of the synchronization sleeve 20, and the other end is connected to the hydraulic pipe 25. The switching component is used to drive the synchronization sleeve 20 to move back and forth.

[0040] By adopting the above technical solution, the housing 11 fixes and supports the clutch 1 21 through the connecting pipe 46. The clutch 1 21 and the clutch 2 22 respectively drive the fixed sleeve 26 and the fixed rod 23 to rotate. The power of the vehicle motor is transmitted to the clutch 1 21 and the clutch 2 22 through the driving rod 14. The transmission and separation of power are realized by two sets of clutches. The clutch 1 21 and the clutch 2 22 can realize the rotation of one of the fixed rod 23 and the fixed sleeve 26. The hydraulic drive 42 can be driven to operate by being connected to the hydraulic pipe 25. The fixed rod 23 and the fixed sleeve 26 support the sliding of the synchronous sleeve 20 through the mounting sleeve 43. When the hydraulic driver 42 moves inside the slide groove 41, it will drive the synchronous sleeve 20 to slide along the surface of the mounting sleeve 43. The slide groove 41 cooperates with the hydraulic driver 42 to play a sliding guiding role for the synchronous sleeve 20, so that the synchronous sleeve 20 can rotate synchronously with the mounting sleeve 43. The hydraulic driver 42 controls the synchronous sleeve 20 to rotate toward the corresponding gear set, which can match the output power of the motor with the transmission coefficient of the gear set, thereby effectively realizing smooth gear switching, and thus improving the gear shifting accuracy to a certain extent (the dual clutch in this application adopts the disclosed existing technology, so its specific working principle and structure will not be described in detail here).

[0041] Specifically, such as Figure 3 、 Figure 5 and Figure 7As shown, a locking assembly is provided on the outside of the synchronization sleeve 20, and the locking assembly includes a second clamping block 32 fixedly connected to the left and right ends of the outer surface of the synchronization sleeve 20, and a clamping block 28 is fixedly connected to the inner surface of the mounting groove 27. The number of the clamping blocks 1 28 and the second clamping blocks 32 is several groups and distributed in a ring array, and the clamping blocks 1 28 and the second clamping blocks 32 are in locking contact.

[0042] By adopting the above technical solution, in order to improve the stability of the reducer during power transmission and reduce the probability of gear jumping during the gear shifting process of the reducer, a locking assembly is provided. When the synchronizer sleeve 20 moves toward the direction of gear three 18, it will drive the block two 32 on its side to move synchronously. Gear three 18 and gear four 19 both fix the block one 28 through the mounting groove 27. As the synchronizer sleeve 20 gradually moves, the block two 32 will gradually engage with the block one 28. Power transmission can be achieved through the block one 28 and the block two 32, avoiding the probability of slipping between the synchronizer sleeve 20 and the gear set when large torque is transmitted, thereby further improving the operating reliability of the multi-stage reducer and helping the reducer to operate smoothly under different torques.

[0043] Specifically, such as Figure 7 As shown, an extrusion assembly is provided inside the movable groove 34, and the extrusion assembly includes a support plate 36 fixedly connected to the outer surface of the upper end of the extrusion seat 37, and the support plate 36 is arc-shaped. A receiving groove 29 is embedded on the outer surface of the block 28 near the synchronous sleeve 20, and a magnetic block 30 is fixedly connected to the inner side of the receiving groove 29. A magnetic ring 35 is fixedly connected to the outer surface of the support plate 36 near the block 28.

[0044] The inner side of the housing 11 is rotatably connected to a drive rod 2 15 through a bearing. The drive rod 2 15 extends to the outside of the housing 11. The outer surface of the drive rod 2 15 is fixedly connected to a gear 16 and a gear 2 17. The gear 16 and the gear 3 18 are respectively meshed and connected with the gear 3 18 and the gear 4 19.

[0045] The outer surface of the housing 11 is provided with a plurality of heat dissipation slots 12. The clutch 1 21 and the clutch 2 22 are both located inside the shield 13. The support plates 36 are provided in a plurality of groups and are distributed in a ring array. The support plates 36 are made of elastic material.

[0046] By adopting the above technical solution, the heat dissipation grooves 12 on the surface of the housing 11 can effectively increase the contact area between the housing 11 and the air, thereby helping to improve the heat dissipation effect of the speed reducer. After the power of the motor is transmitted to the third gear 18 and the fourth gear 19 through the clutch and the synchronizer sleeve 20, the third gear 18 and the fourth gear 19 are respectively meshed and drivingly connected with the first gear 16 and the second gear 17, which will drive the first gear 16 and the second gear 17 to rotate synchronously. Thus, the second drive rod 15 is driven to rotate synchronously by the first gear 16 or the second gear 17, and the power is transmitted to the wheels through the second drive rod 15 to achieve the smooth driving of the vehicle.

[0047] The movable groove 34 is traction-supported by the support plate 36 for the extrusion seat 37, and the first clamping block 28 fixedly installs the magnetic block 30 through the storage groove 29. When the synchronizer sleeve 20 moves towards the first clamping block 28, the support plate 36 will drive the magnetic ring 35 on its surface to move synchronously. Subsequently, a certain magnetic attraction force will be generated between the magnetic block 30 and the magnetic ring 35. At this time, the support plate 36 gradually turns from a bent state to a straight state under the action of the magnetic attraction force, and the extrusion seat 37 is pushed downward by the support plate 36, so that the lower end of the extrusion seat 37 fits more closely with the outer surface of the tapered sleeve 31, which helps to further increase the friction force between the extrusion seat 37 and the tapered sleeve 31, thereby effectively reducing the probability of jerks during the gear shifting of the speed reducer, and further ensuring the smoothness of gear shifting of the speed reducer.

[0048] Specifically, as Figure 5 shown, an expansion assembly is provided between the first clamping block 28 and the second clamping block 32. The expansion assembly includes a through hole 44 penetrating through the inner side of the second clamping block 32. A spring 45 is arranged inside the through hole 44. The outer surface of the second clamping block 32 is symmetrically and fixedly connected with extrusion plates 33. The extrusion plates 33 are arc-shaped. The outer surface of the extrusion plates 33 is in sliding contact with the first clamping block 28. The inner surfaces of the two extrusion plates 33 are respectively fixedly connected with both ends of the spring 45.

[0049] When the second locking member 32 is in contact with the first locking member 28, the second locking member 32 will move more closely with the surface of the first locking member 28, thereby further improving the operating reliability of the synchronous assembly, helping to reduce the probability of tooth jumping between the first locking member 28 and the second locking member 32, and maintaining a fixed transmission ratio between the gear sets, thereby improving the stability of the vehicle during driving.

[0050] Working principle: When the multi-stage reducer is working, the power of the motor is transmitted to gear three 18 and gear four 19 through the clutch and the synchronous sleeve 20. Then, gear three 18 and gear four 19 are respectively meshed with gear one 16 and gear two 17 to drive gear one 16 and gear two 17 to rotate synchronously, thereby driving the drive rod two 15 to rotate synchronously through gear one 16 or gear two 17. When the synchronous sleeve 20 drives gear three 18 to move synchronously, it is connected to the hydraulic driver 42 through the hydraulic pipe 25 to drive the hydraulic driver 42 to operate. During the movement of the hydraulic driver 42 inside the slide groove 41, it drives the synchronous sleeve 20 to slide along the surface of the mounting sleeve 43. As the synchronous sleeve 20 gradually moves, the card block two 32 will gradually engage with the card block one 28. The power transmission can be achieved through the card block one 28 and the card block two 32. The synchronous sleeve 20 and the squeeze After the pressure seat 37 moves for a period of time, the lower end of the extrusion seat 37 will contact the outer surface of the tapered sleeve 31. At this time, the synchronous sleeve 20 drives the gear three 18 to rotate synchronously through the friction between the extrusion seat 37 and the tapered sleeve 31, and the extrusion seat 37 is stretched by the heat expansion of the metal sheet 40. At this time, the friction between the extrusion seat 37 and the tapered sleeve 31 can be effectively increased. At the moment when the extrusion seat 37 contacts the tapered sleeve 31, there will be enough friction to drive the gear three 18 to rotate. It can not only effectively shorten the delay of the gear set during the gear shifting process, but also push the extrusion seat 37 downward through the support plate 36, so that the lower end of the extrusion seat 37 is more closely fitted with the outer surface of the tapered sleeve 31, which helps to further increase the friction between the extrusion seat 37 and the tapered sleeve 31, thereby effectively reducing the chance of setbacks during the gear shifting process of the reducer.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. Dual-clutch multi-speed reducer, comprising a housing (11), a fixing rod (23) and a fixing sleeve (26), characterized in that: The fixed sleeve (26) is sleeved on the outer part of the fixed rod (23). An installation sleeve (43) is fixedly connected to the outer surfaces of the fixed rod (23) and the fixed sleeve (26). The installation sleeve (43) is movably connected to a synchronous sleeve (20) through a driving component. Gear three (18) and gear four (19) are rotatably connected to the outer surfaces of the fixed rod (23) and the fixed sleeve (26). A synchronous component is arranged outside the fixed sleeve (26). Gear three (18) and gear four (19) are distributed at both ends of the fixed sleeve (26). The synchronous component includes installation grooves (27) formed on the outer surfaces of gear three (18) and gear four (19). A conical sleeve (31) is fixedly connected to the inner surface of the installation groove (27). An activity groove (34) is formed at the lower end of the inner surface of the synchronous sleeve (20). An extrusion seat (37) is slidably connected to the inner surface of the activity groove (34). A cavity (38) is embedded on the inner side of the extrusion seat (37). A metal sheet (40) is arranged inside the cavity (38). The synchronous component is used to drive one of the groups of gears of gear three (18) and gear four (19) to rotate. The outer surface of the extrusion seat (37) is in sliding contact with the conical sleeve (31). The pitch circle diameters of gear three (18) and gear four (19) are different. The activity groove (34) and the extrusion seat (37) are both annular. The extrusion seat (37) is made of an elastic wear-resistant material. The outer surface of the extrusion seat (37) is arc-shaped on the side close to the conical sleeve (31). The metal sheet (40) is in a U-shaped structure. The metal sheet (40) is made of a thermal expansion material.

2. The dual clutch multi-speed reducer according to claim 1, characterized in that: A protective cover (13) is fixedly connected to the outer surface of the front end of the housing (11). A switching component is arranged inside the protective cover (13). The switching component includes a connecting pipe (46) fixedly connected to the outer surface of the front end of the housing (11). A clutch one (21) is rotatably connected to the front end of the connecting pipe (46). A clutch two (22) is arranged inside the clutch one (21).

3. The dual clutch multi-speed reducer according to claim 2, wherein: A driving rod one (14) is fixedly connected to the outer side of the clutch one (21). The clutch one (21) is connected to the fixed sleeve (26). The clutch two (22) is connected to the fixed rod (23). A cavity (24) is embedded inside the fixed rod (23). A hydraulic pipe (25) is arranged outside the clutch two (22) and penetrates into the cavity (24).

4. The dual clutch multi-speed reducer according to claim 3, characterized in that: A hydraulic pipe (25) is arranged outside the clutch one (21) and extends into the fixed sleeve (26). Installation sleeves (43) are fixedly connected to the outer surfaces of the fixed rod (23) and the fixed sleeve (26). A sliding groove (41) is formed on the outer surface of the installation sleeve (43). A hydraulic driver (42) is slidably connected to the inner side of the sliding groove (41). One end of the hydraulic driver (42) is fixedly connected to the inner surface of the synchronous sleeve (20) and the other end is communicated with the hydraulic pipe (25). The switching component is used to drive the synchronous sleeve (20) to reciprocate.

5. The dual-clutch multi-speed reduction gear according to claim 4, wherein: A locking assembly is provided on the outside of the synchronization sleeve (20), and the locking assembly includes a second clamping block (32) fixedly connected to the left and right ends of the outer surface of the synchronization sleeve (20), and a first clamping block (28) is fixedly connected to the inner surface of the installation groove (27). The number of the first clamping block (28) and the second clamping block (32) is several groups and is distributed in a ring array. The first clamping block (28) and the second clamping block (32) are in locking contact.

6. The dual clutch multi-speed reducer according to claim 5, characterized in that: An extrusion assembly is provided inside the movable groove (34), and the extrusion assembly includes a support plate (36) fixedly connected to the outer surface of the upper end of the extrusion seat (37), the support plate (36) is in an arc shape, and a receiving groove (29) is embedded in the outer surface of the clamping block (28) near the synchronous sleeve (20), and a magnetic block (30) is fixedly connected to the inner side of the receiving groove (29), and a magnetic ring (35) is fixedly connected to the outer surface of the support plate (36) near the clamping block (28).

7. The dual clutch multi-speed reducer according to claim 6, characterized in that: An expansion assembly is provided between the first block (28) and the second block (32), and the expansion assembly includes a through hole (44) extending through the inner side of the second block (32). A spring (45) is provided inside the through hole (44). The outer surface of the second block (32) is symmetrically fixedly connected with an extrusion plate (33). The extrusion plate (33) is in an arc shape. The outer surface of the extrusion plate (33) is in sliding contact with the first block (28). The inner surfaces of the two groups of the extrusion plates (33) are respectively fixedly connected to the two ends of the spring (45).

8. The dual-clutch multi-speed reducer according to claim 7, characterized in that: The inner side of the housing (11) is rotatably connected to a driving rod 2 (15) via a bearing. The driving rod 2 (15) extends to the outer side of the housing (11). The outer surface of the driving rod 2 (15) is fixedly connected to a gear 1 (16) and a gear 2 (17). The gear 1 (16) and the gear 3 (18) are meshed and connected to the gear 3 (18) and the gear 4 (19) respectively.

9. The dual clutch multi-speed reducer according to claim 8, characterized in that: The outer surface of the housing (11) is provided with a plurality of heat dissipation grooves (12). The clutch 1 (21) and the clutch 2 (22) are both located inside the shield (13). The support plates (36) are provided in a plurality of groups and are distributed in a ring-shaped array. The support plates (36) are made of elastic material.

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