Double-clutch multi-speed reducer

Abstract

The invention relates to the technical field of speed reducers, and particularly discloses a double-clutch multi-speed reducer which comprises a shell, a fixing rod and a fixing sleeve, the fixing sleeve is arranged on the partial area of the outer side of the fixing rod in a sleeving mode, a mounting sleeve is fixedly connected to the outer surface of the fixing rod and the outer surface of the fixing sleeve, and the mounting sleeve is movably connected with a synchronous sleeve through a driving part. A third gear and a fourth gear are rotationally connected to the outer surface of the fixing rod and the outer surface of the fixing sleeve correspondingly. By arranging the synchronous assembly, the extrusion base is stretched through the metal sheet, the friction force between the extrusion base and the conical sleeve can be effectively increased, the enough friction force can be generated at the moment when the extrusion base makes contact with the conical sleeve to drive the third gear to rotate, delay of the gear set in the gear shifting switching process can be effectively shortened, and the gear shifting switching efficiency is improved. The gear shifting precision can be improved, the pause feeling in the gear shifting process of the multi-speed transmission can be reduced, and meanwhile the smoothness in the gear shifting process can be further improved through the temperature change in the speed reducer.

Description

Technical Field

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

[0002] The dual-clutch multi-speed reducer is an advanced mechanical transmission device with unique structural and performance characteristics. It contains two independent clutches, which are responsible for controlling the switching of odd and even gears respectively, 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 with its unique structural characteristics, efficient working principle and significant performance advantages; For some new energy vehicles that use dual-clutch multi-speed reducers, when driving, under complex road conditions such as vehicle starting, low-speed driving, and frequent acceleration and deceleration, it is difficult for the computer to accurately predict the driver's intentions, resulting in inaccurate gear shifting timing or delays in the gear shifting process, which in turn causes a sense of frustration; and the fast upshifting speed of the dual-clutch transmission is achieved by pre-engaging the previous gear, but downshifting requires first disengaging the high gear and then engaging the low gear. When the engine is in a high-speed state and suddenly engages a low gear, it is easy to jerk, affecting the smoothness of driving and ride comfort. Summary of the invention

[0003] The purpose of the present invention is to provide a vehicle dual-clutch multi-speed reducer, which can effectively shorten the delay of the gear set during the gear shifting process, improve the gear shifting accuracy and reduce the sense of frustration during the gear shifting process of the multi-stage transmission, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a dual-clutch multi-speed reducer, comprising a housing, a fixed rod and a fixed sleeve, wherein the fixed sleeve is arranged on a partial area outside the fixed rod, the fixed rod and the outer surface of the fixed sleeve are fixedly connected with a mounting sleeve, the mounting sleeve is movably connected with a synchronous sleeve through a driving part, the outer surfaces of the fixed rod and the fixed sleeve are both rotatably connected with gear three and gear four, and a synchronous assembly is arranged on the outer side of the fixed sleeve; The gear three and the gear four are distributed at both ends of the fixed sleeve, the synchronization component includes a mounting groove opened on the outer surface of the gear three and the gear four, the inner surface of the mounting groove is fixedly connected with a conical sleeve, the lower end of the inner surface of the synchronization sleeve is provided with a movable groove, the inner surface of the movable groove is slidably connected with an extrusion seat, a cavity is embedded in the inner side of the extrusion seat, a metal sheet is arranged inside the cavity, and the synchronization component is used to drive one of the gears of the gear three and the gear four to rotate.

[0005] Preferably, the outer surface of the extrusion seat is in sliding contact with the tapered sleeve, the pitch circle diameters of gear three and gear four are different, the movable groove and the extrusion seat are both annular, the extrusion seat is made of 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 U-shaped, and the metal sheet is made of thermal expansion material.

[0006] Preferably, a shield is fixedly connected to the outer surface of the front end of the shell, a switching assembly is arranged inside the shield, the switching assembly includes a connecting tube fixedly connected to the outer surface of the front end of the shell, a clutch 1 is rotatably connected to the front end of the connecting tube, and a clutch 2 is arranged inside the clutch 1.

[0007] Preferably, a driving rod 1 is fixedly connected to the outer side of the clutch 1, the clutch 1 is connected to the fixed sleeve, the clutch 2 is connected to the fixed rod, a cavity is embedded in the inner side of the fixed rod, and a hydraulic pipe is arranged on the outer side of the clutch 2 and penetrates into the cavity.

[0008] Preferably, a hydraulic pipe is provided on the outer side of the clutch and extends to the inside of the fixed sleeve, the fixed rod and the outer surface of the fixed sleeve are fixedly connected with a mounting sleeve, the outer surface of the mounting sleeve is provided with a slide groove, the inner side of the slide groove is slidably connected with a hydraulic driver, one end of the hydraulic driver is fixedly connected to the inner surface of the synchronous sleeve and the other end is connected to the hydraulic pipe, and the switching assembly is used to drive the synchronous sleeve to reciprocate.

[0009] Preferably, a locking assembly is provided on the outside of the synchronous sleeve, and the locking assembly includes a clamping block 2 fixedly connected to the left and right ends of the outer surface of the synchronous sleeve, and a clamping block 1 is fixedly connected to the inner surface of the mounting groove. The number of the clamping blocks 1 and 2 is several groups and they are divided into a ring array, and the clamping blocks 1 and 2 are in locking contact.

[0010] Preferably, an extrusion assembly is provided on the inner side of the movable groove, and the extrusion assembly includes a support plate fixedly connected to the outer surface of the upper end of the extrusion seat, the support plate is arc-shaped, and a receiving groove is embedded on the outer surface of the clamping block close to the side of the synchronous sleeve, a magnetic block is fixedly connected to the inner side of the receiving groove, and a magnetic ring is fixedly connected to the outer surface of the support plate close to the side of the clamping block.

[0011] Preferably, an expansion component is provided between the first block and the second block, the expansion component includes a through hole extending through the inner side of the second block, a spring is provided inside the through hole, an extrusion plate is symmetrically fixedly connected to the outer surface of the second block, the extrusion plate is arc-shaped, the outer surface of the extrusion plate is in sliding contact with the first block, and the inner surfaces of the two groups of extrusion plates are respectively fixedly connected to the two ends of the spring.

[0012] Preferably, a drive rod 2 is rotatably connected to the inner side of the shell 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 gear 1 and gear 3 are respectively meshed and transmission connected with gear 3 and gear 4.

[0013] Preferably, the outer surface of the shell is provided with a plurality of heat dissipation grooves, the clutch 1 and the clutch 2 are both located inside the shield, the number of the support plates is a plurality of groups and distributed in a ring array, and the support plates are made of elastic material.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This solution can effectively increase the friction between the extrusion seat and the tapered sleeve by setting a synchronization component and stretching the extrusion seat through a metal sheet. At the moment when the extrusion seat and the tapered sleeve come into contact, there is enough friction to drive the gear three to rotate, which can not only effectively shorten the delay of the gear set during the gear shifting process, but also improve the gear shifting accuracy and reduce the frustration during the gear shifting process of the multi-stage transmission. At the same time, the smoothness of the gear shifting process can be further improved through the temperature change inside the reducer; 2. In this scheme, by setting an extrusion assembly, the support plate gradually turns from a bent state to a straight state under the action of magnetic attraction, and 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, which helps to further increase the friction between the extrusion seat and the tapered sleeve, thereby effectively reducing the probability of setbacks during the gear shifting process of the reducer, thereby ensuring the gear shifting reliability of the reducer; 3. In this scheme, by setting an expansion component, the extrusion plate can contact the surface of block one more closely under the action of its own elastic force and the elastic force of the spring, thereby further improving the operating reliability of the synchronization component, helping to reduce the probability of tooth jumping between block one and block two, 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

[0015] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the housing of the present invention; Figure 3 It is a cross-sectional view of the overall structure of the present invention; Figure 4 It is a schematic diagram of the expansion assembly structure of the present invention; Figure 5 For the present invention Figure 4 The enlarged schematic diagram at A in the middle; Figure 6 For the present invention Figure 3 The enlarged schematic diagram of point B in the middle; Figure 7 For the present invention Figure 3 Enlarged schematic diagram at point C in the middle.

[0017] Description of reference numerals: 11. Shell; 12. Heat dissipation groove; 13. Shield; 14. Drive rod 1; 15. Drive rod 2; 16. Gear 1; 17. Gear 2; 18. Gear 3; 19. Gear 4; 20. Synchronous sleeve; 21. Clutch 1; 22. Clutch 2; 23. Fixed rod; 24. Cavity; 25. Hydraulic pipe; 26. Fixed sleeve; 27. Mounting groove; 28. Block 1; 29. ​​Storage groove; 30. Magnetic block; 31. Conical sleeve; 32. Block 2; 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. Mounting sleeve; 44. Through hole; 45. Spring; 46. Connecting pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figures 1 to 7 , the present invention provides a technical solution: A dual-clutch multi-speed reducer comprises a housing 11, a fixed rod 23 and a fixed sleeve 26, wherein the fixed sleeve 26 is sleeved on a part of the outer area of ​​the fixed rod 23, the outer surfaces of the fixed rod 23 and the fixed sleeve 26 are fixedly connected with a mounting sleeve 43, the mounting sleeve 43 is movably connected with a synchronous sleeve 20 through a driving component, the outer surfaces of the fixed rod 23 and the fixed sleeve 26 are both rotatably connected with a gear three 18 and a gear four 19, and a synchronous component is arranged on the outer side of the fixed sleeve 26; The gear three 18 and the gear four 19 are distributed at both ends of the fixed sleeve 26. The synchronization component includes a mounting groove 27 opened on the outer surface of the gear three 18 and the gear four 19. The inner surface of the mounting groove 27 is fixedly connected with a tapered sleeve 31. The lower end of the inner surface of the synchronization sleeve 20 is provided with a movable groove 34. The inner surface of the movable groove 34 is slidably connected with an extrusion seat 37. The outer surface of the extrusion seat 37 is in sliding contact with the tapered sleeve 31. A cavity 38 is embedded in the inner side of the extrusion seat 37. A metal sheet 40 is arranged inside the cavity 38. The synchronization component is used to drive one of the gears of the gear three 18 and the gear four 19 to rotate.

[0020] The pitch circle diameters of the gear three 18 and the gear four 19 are different. The movable groove 34 and the extrusion seat 37 are both ring-shaped. The extrusion seat 37 is made of elastic wear-resistant material. The outer surface of the extrusion seat 37 is arc-shaped near the conical sleeve 31. The metal sheet 40 is U-shaped and is made of thermal expansion material.

[0021] By adopting the above technical solution, when new energy vehicles are starting, driving at low speed, and frequently accelerating and decelerating under complex road conditions, the vehicle control system is difficult to accurately predict the driver's intention, resulting in inaccurate shifting timing of the multi-stage reducer or delays in the shifting process, which in turn produces a sense of frustration, affecting the smoothness of driving and riding comfort. In order to improve the accuracy of shifting and reduce the delay in the shifting process, a synchronization component is set. 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, and the mounting sleeve 43 slides and supports the synchronization sleeve 20 through the driving component, so that the synchronization sleeve 20 can The mounting groove 27 provided on the surface of the gear three 18 and the gear four 19 is used to fix and support the tapered sleeve 31. When the synchronous sleeve 20 slides toward the side of the gear three 18, the synchronous sleeve 20 drives the extrusion seat 37 to move synchronously through the movable groove 34. After the synchronous 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 synchronous sleeve 20 drives the gear three 18 to rotate synchronously through the friction between the extrusion seat 37 and the tapered sleeve 31, so that the gear three 18 and the synchronous sleeve 20 can rotate at the same speed, so that the power can be transmitted between the fixed rod 23 and the gear three 18. The extrusion seat 37 is made of elastic wear-resistant material, which can not only increase the friction between the extrusion seat 37 and the conical sleeve 31, but also produce a certain degree of elastic deformation. The metal sheet 40 is formed by pressing two sets of metal plates with different thermal expansion coefficients, and the thermal expansion coefficient of the inner metal plate is greater than that of the outer metal plate. The metal sheet 40 is in a U-shaped structure and will apply a certain pressure to the lower side of the extrusion seat 37 through the cavity 38. After the multi-speed reducer has been working for a period of time, the temperature inside it will gradually increase. At this time, the heat-expanding metal sheet 40 will expand due to the heat, and the thermal expansion rate of the inner metal plate will be greater than that of the outer metal plate. Thermal expansion coefficient, at this time, the metal sheet 40 will gradually flip from the bent state to a straight line, so that the extrusion seat 37 can be stretched by the metal sheet 40, which can effectively increase the friction between the extrusion seat 37 and the tapered sleeve 31. 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, which can not only effectively shorten the delay of the gear set during the gear shifting process, but also improve the gear shifting accuracy and reduce the frustration during the gear shifting process of the multi-stage transmission. At the same time, after working for a period of time, the smoothness of the gear shifting process can be further improved through the temperature change inside the reducer.

[0022] Specifically, Figure 3 and Figure 6 As shown, a shield 13 is fixedly connected to the front end outer surface of the shell 11, a switching assembly is arranged inside the shield 13, and the switching assembly includes a connecting pipe 46 fixedly connected to the front end outer surface of the shell 11, a clutch 1 21 is rotatably connected to the front end of the connecting pipe 46, and a clutch 2 22 is arranged inside the clutch 1 21.

[0023] The clutch 1 21 is fixedly connected to a driving rod 14 on its outer side. The clutch 1 21 is connected to a fixing sleeve 26. The clutch 2 22 is connected to a fixing rod 23. A cavity 24 is embedded in the fixing rod 23. A hydraulic pipe 25 is arranged on the outer side of the clutch 22 and penetrates into the cavity 24.

[0024] 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 inner side of the slide 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 connected to the hydraulic pipe 25. The switching assembly is used to drive the synchronous sleeve 20 to move back and forth.

[0025] By adopting the above technical solution, the housing 11 fixes and supports the clutch 1 21 through the connecting pipe 46, and 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, and the power transmission and separation are realized through two groups 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, and the hydraulic drive 42 can be driven to operate by connecting the hydraulic pipe 25 to the hydraulic drive 42. The fixed rod 23 and the fixed sleeve 26 support the synchronous sleeve 20 slidingly 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 further improving the gear shifting accuracy to a certain extent (the dual clutch in this application adopts the disclosed prior art, so its specific working principle and structure will not be described in detail here).

[0026] Specifically, Figure 3 , Figure 5 and Figure 7 As shown, a locking assembly is provided on the outside of the synchronous 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 synchronous 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.

[0027] By adopting the above technical scheme, 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 synchronous 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 synchronous 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 synchronous 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.

[0028] Specifically, Figure 7As 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 close to 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 close to the block 28.

[0029] The inner side of the shell 11 is rotatably connected with a driving rod 2 15 through a bearing, and the driving rod 2 15 extends to the outside of the shell 11. The outer surface of the driving rod 2 15 is fixedly connected with a gear 16 and a gear 2 17. The gear 16 and the gear 3 18 are meshed and transmission connected with the gear 3 18 and the gear 4 19 respectively.

[0030] 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.

[0031] By adopting the above technical solution, the heat dissipation groove 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 reducer. After the power of the motor is transmitted to the gear three 18 and the gear four 19 through the clutch and the synchronous sleeve 20, the gear three 18 and the gear four 19 are respectively meshed and connected with the gear one 16 and the gear two 17 to drive the gear one 16 and the gear two 17 to rotate synchronously, thereby driving the drive rod two 15 to rotate synchronously through the gear one 16 or the gear two 17, and transmitting the power to the wheels through the drive rod two 15 to achieve stable driving of the vehicle; The movable groove 34 supports the extrusion seat 37 through the support plate 36, and the block 28 fixes the magnetic block 30 through the storage groove 29. When the synchronous sleeve 20 moves toward the side of the block 28, the support plate 36 will drive the magnetic ring 35 on its surface to move synchronously, and then a certain magnetic attraction will be generated between the magnetic block 30 and the magnetic ring 35. At this time, the support plate 36 gradually flips from a bent state to a straight state under the action of the magnetic attraction, and pushes the extrusion seat 37 downward through 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 between the extrusion seat 37 and the tapered sleeve 31, thereby effectively reducing the probability of setbacks during the gear shifting process of the reducer, thereby ensuring the smoothness of the gear shifting of the reducer.

[0032] Specifically, Figure 5As shown, an expansion component is provided between the block 1 28 and the block 2 32, and the expansion component includes a through hole 44 extending through the inner side of the block 2 32, and a spring 45 is provided inside the through hole 44. The outer surface of the block 2 32 is symmetrically fixedly connected with an extrusion plate 33, and the extrusion plate 33 is in an arc shape. The outer surface of the extrusion plate 33 is in sliding contact with the block 1 28, and the inner surfaces of the two groups of the extrusion plates 33 are respectively fixedly connected to the two ends of the spring 45.

[0033] By adopting the above technical solution, when the locking assembly is working, when the second card block 32 is inserted between the first card block 28, the second card block 32 will drive the extrusion plate 33 on its surface to move synchronously, and the extrusion plate 33 will contact the surface of the first card block 28, and the extrusion plate 33 will produce a certain degree of elastic deformation, thereby increasing the friction between the first card block 28 and the second card block 32. The second card block 32 is used to place a spring 45 through the through hole 44. The two ends of the spring 45 are fixedly connected to the extrusion plate 33 to apply a certain elastic force to the extrusion plate 33, thereby enabling the extrusion plate 33 to maintain an arc shape, and when the first card block 28 contacts the second card block 32, the extrusion plate 33 can be more closely in contact with the surface of the first card block 28 under the action of its own elastic force and the elastic force of the spring 45, thereby further improving the operating reliability of the synchronization assembly, helping to reduce the probability of tooth jumping between the first card block 28 and the second card block 32, and enabling the gear sets to maintain a fixed transmission ratio, thereby improving the stability of the vehicle during driving.

[0034] 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 driving 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 block two 32 will gradually engage with the block one 28. The power transmission can be realized through the block one 28 and the 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 and the tapered sleeve 31 contact, there will be enough friction to drive the gear three 18 to rotate, which 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 and the outer surface of the tapered sleeve 31 fit more closely, which helps to further increase the friction between the extrusion seat 37 and the tapered sleeve 31, thereby effectively reducing the probability of setbacks during the gear shifting process of the reducer.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, 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. A dual-clutch multi-speed reducer, comprising a housing (11), a fixing rod (23) and a fixing sleeve (26), characterized in that: The fixing sleeve (26) is sleeved on a partial area outside the fixing rod (23); the fixing rod (23) and the fixing sleeve (26) are fixedly connected to the outer surfaces with a mounting sleeve (43); the mounting sleeve (43) is movably connected to a synchronizing sleeve (20) via a driving assembly; the fixing rod (23) and the fixing sleeve (26) are rotatably connected to the outer surfaces with a gear three (18) and a gear four (19); and a synchronizing assembly is arranged on the outer side of the fixing sleeve (26); The gear three (18) and the gear four (19) are distributed at both ends of the fixed sleeve (26); the synchronous assembly comprises a mounting groove (27) provided on the outer surface of the gear three (18) and the gear four (19); a conical sleeve (31) is fixedly connected to the inner surface of the mounting groove (27); a movable groove (34) is provided 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 movable groove (34); a cavity (38) is embedded in the inner side of the extrusion seat (37); a metal sheet (40) is provided in the inner side of the cavity (38); the synchronous assembly is used to drive one of the gears of the gear three (18) and the gear four (19) to rotate.

2. The dual-clutch multi-speed reducer according to claim 1, characterized in that: The outer surface of the extrusion seat (37) is in sliding contact with the tapered sleeve (31); the pitch circle diameters of the gear three (18) and the gear four (19) are different; the movable 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 a side close to the tapered sleeve (31); the metal sheet (40) is U-shaped; and the metal sheet (40) is made of a thermal expansion material.

3. The dual-clutch multi-speed reducer according to claim 2, characterized in that: A shield (13) is fixedly connected to the outer surface of the front end of the shell (11), a switching assembly is arranged inside the shield (13), and the switching assembly comprises a connecting pipe (46) fixedly connected to the outer surface of the front end of the shell (11), a clutch 1 (21) is rotatably connected to the front end of the connecting pipe (46), and a clutch 2 (22) is arranged inside the clutch 1 (21).

4. The dual-clutch multi-speed reducer according to claim 3, characterized in that: The clutch 1 (21) is fixedly connected to a driving rod 1 (14) on its outer side, the clutch 1 (21) is connected to a fixing sleeve (26), the clutch 2 (22) is connected to a fixing rod (23), a cavity (24) is embedded in the inner side of the fixing rod (23), and a hydraulic pipe (25) is arranged on the outer side of the clutch 2 (22) and penetrates into the cavity (24).

5. The dual-clutch multi-speed reducer according to claim 4, characterized in that: A hydraulic pipe (25) is arranged on the outer side of the clutch 1 (21) and extends to the interior of the fixed sleeve (26); the outer surfaces of the fixed rod (23) and the fixed sleeve (26) are fixedly connected to 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 inner side of the slide 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 connected to the hydraulic pipe (25); the switching assembly is used to drive the synchronous sleeve (20) to reciprocate.

6. The dual-clutch multi-speed reducer according to claim 5, characterized in that: A snap-fit ​​assembly is arranged on the outside of the synchronous sleeve (20), and the snap-fit ​​assembly comprises a second snap-fit ​​block (32) fixedly connected to the left and right ends of the outer surface of the synchronous sleeve (20); a first snap-fit ​​block (28) is fixedly connected to the inner surface of the mounting groove (27); the first snap-fit ​​block (28) and the second snap-fit ​​block (32) are arranged in a plurality of groups and are distributed in a ring array; the first snap-fit ​​block (28) and the second snap-fit ​​block (32) are snap-fitted and contacted.

7. The dual-clutch multi-speed reducer according to claim 6, characterized in that: An extrusion assembly is arranged inside the movable groove (34), and the extrusion assembly comprises 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 inside 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).

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

9. The dual-clutch multi-speed reducer according to claim 8, characterized in that: The inner side of the housing (11) is rotatably connected to a second drive rod (15) via a bearing. The second drive rod (15) extends to the outer side of the housing (11). The outer surface of the second drive rod (15) is fixedly connected to a first gear (16) and a second gear (17). The first gear (16) and the third gear (18) are meshingly connected to the third gear (18) and the fourth gear (19) respectively.

10. The dual-clutch multi-speed reducer according to claim 9, characterized in that: The outer surface of the housing (11) is provided with a plurality of groups 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; and the support plates (36) are made of elastic material.

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