A face gear stepless speed regulation transmission device and a stepless speed regulation method

Abstract

The present application relates to gear transmission, and particularly relates to a face gear stepless speed regulation transmission device and a stepless speed regulation method. The face gear stepless speed regulation transmission device comprises a face gear transmission module and a face gear speed regulation module. The face gear transmission module comprises a shell assembly, an input face gear assembly, an output face gear assembly and a planetary face gear assembly. The input face gear assembly comprises a first face gear, the output face gear assembly comprises a second face gear, and the planetary face gear assembly comprises a carrier, a third face gear and a planetary gear. The first face gear is engaged with the second face gear through the planetary gear. The face gear speed regulation module comprises a power input device, a load speed regulator and a speed regulation face gear assembly. The power input device is connected with the first face gear, and the speed regulation face gear assembly comprises a cylindrical gear engaged with the third face gear. The load speed regulator is connected with the cylindrical gear. The present application realizes stepless speed regulation of high power transmission by disturbing the transmission between the first face gear and the second face gear.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gear transmission in various industries, including aviation, ship, automobile transmission, etc., and particularly to a face gear stepless speed regulation transmission device and a stepless speed regulation method. BACKGROUND

[0002] With the increasingly serious global climate change problem, many devices in the field of new energy vehicles and aviation need to meet the demand of multi-working condition operation, and the stepless speed regulation transmission device is used in the device to realize certain functions and improve energy utilization. At present, the automobile gear transmission usually needs to combine with the clutch to realize the function of variable transmission ratio, and the internal structure and control logic are complex, the cost is high, and the transmission ratio is fixed. Some automobile transmission devices that can realize stepless speed regulation have limited power transmission, which is not suitable for high-power working conditions. In the aviation transportation industry, the carbon emission ratio is high, and with the continuous growth of aviation transportation volume, it shows an upward trend. Therefore, improving the fuel economy of the aircraft engine has become a key technology. The low-pressure rotor and fan of the traditional turbofan engine are rigidly connected, and the fan speed is forced to synchronize with the low-pressure turbine speed, which causes the efficiency of the fan to decrease significantly under non-design conditions (such as take-off and climb). In order to break this bottleneck, commercial aircraft engines have added planetary gear reducers between the low-pressure rotor and the fan, allowing the low-pressure rotor to operate at a higher speed while the fan rotates at a lower speed, achieving a significant reduction in fuel consumption.

[0003] The typical structure of the planetary gear reducer is composed of a sun gear, a planet gear, a ring gear and a planet carrier, and a fixed transmission ratio is achieved by fixing the ring gear or the planet carrier. However, the transmission ratio of such transmission devices is fixed and cannot be changed, which limits their adaptability in the automotive and aviation industries. For example, in the aviation industry, the design of fixed transmission ratio limits the adaptability of the aircraft in different flight stages (such as take-off, climb, cruise and descent), forcing the engine to adopt a compromise solution throughout the flight envelope, which cannot achieve optimal efficiency matching in each stage, restricting further improvement of fuel economy and failing to meet the speed ratio requirements of the aircraft in multiple states such as take-off and cruise. SUMMARY

[0004] The technical problem to be solved by the embodiments of the present application is to provide a face gear stepless speed regulation transmission device and a stepless speed regulation method to solve the problem that the conventional automobile stepless transmission cannot transmit large power in a limited space, and the single transmission ratio of the conventional star gear reducer cannot meet the speed ratio requirements of the aircraft in multiple states.

[0005] The application discloses a face gear stepless speed regulation transmission device, which comprises a face gear transmission module and a face gear speed regulation module. The face gear transmission module comprises a shell assembly, an input face gear assembly, an output face gear assembly and a planetary face gear assembly which are integrally arranged on the shell assembly. The input face gear assembly comprises a first face gear, the output face gear assembly comprises a second face gear, the tooth surfaces of the first face gear and the second face gear are oppositely arranged, the planetary face gear assembly comprises a planet carrier arranged between the first face gear and the second face gear, a third face gear fixedly arranged on the planet carrier and a planet wheel rotatably arranged on the planet carrier, the first face gear is engaged with the second face gear through the planet wheel, the face gear speed regulation module comprises a power input device, a load speed regulator and a speed regulation face gear assembly arranged on the shell assembly, the power input device is connected with the first face gear, the speed regulation face gear assembly comprises a cylindrical gear, the cylindrical gear is engaged with the third face gear, and the load speed regulator is connected with the cylindrical gear.

[0006] Optionally, the first face gear comprises a first assembly ring and a first ring plate integrally formed on the outer wall of the first assembly ring, and a first face tooth is formed on the edge of one side of the plate surface of the first ring plate along the circumferential direction.

[0007] The second face gear comprises a second assembly ring and a second ring plate integrally formed on the outer wall of the second assembly ring, and a corresponding second face tooth is formed on the edge of the plate surface of the second ring plate relative to the first face gear.

[0008] The first assembly ring and the second assembly ring are arranged in close proximity along the same central axis, and a transmission gap for the planet wheel is formed between the first ring plate and the second ring plate.

[0009] Optionally, the shell assembly comprises an annular shell, a first end cover arranged in a ring hole on one side of the annular shell and a second end cover arranged in a ring hole on the other side of the annular shell, the first end cover is provided with a first connecting hole matched with the input shaft of the power input device, the second end cover is provided with a second connecting hole matched with the load output shaft, and the first connecting hole, the first assembly ring, the second assembly ring and the second connecting hole are coaxial.

[0010] The inner wall of the first assembly ring is provided with a first inner engagement tooth matched with the input shaft of the power input device, and the inner wall of the second assembly ring is provided with a second inner engagement tooth matched with the load output shaft.

[0011] Optionally, the shell assembly further comprises a first fixing member and a second fixing member, the first fixing member comprises a plurality of first screws distributed along the circumference of the first end cover, and the first end cover is connected with the annular shell through the first screws, the second fixing member comprises a plurality of second screws distributed along the circumference of the second end cover, and the second end cover is connected with the annular shell through the second screws.

[0012] The first connecting hole is provided with a first sealing ring, and the second connecting hole is provided with a second sealing ring.

[0013] Optionally, the input face gear assembly further comprises a first input bearing arranged on the first assembly ring on one side of the first ring plate, the first input bearing is on the same side of the first face tooth, and an inner surface of the first end cover is provided with a first limiting ring, and an outer wall of the first assembly ring is rotationally connected with an inner wall of the first limiting ring through the first input bearing.

[0014] The output face gear assembly further comprises a first output bearing arranged on the second assembly ring on one side of the second ring plate, the first output bearing is on the same side of the second face tooth, and an inner surface of the second end cover is provided with a second limiting ring, and an outer wall of the second assembly ring is rotationally connected with an inner wall of the second limiting ring through the first output bearing.

[0015] Optionally, the planet carrier comprises a third assembly ring, and a third ring plate is integrally formed on an outer wall of the third assembly ring, the first assembly ring, the second assembly ring and the third assembly ring share a common central axis, and the third face gear is arranged on the third ring plate through a shear bolt.

[0016] The input face gear assembly further comprises a second input bearing arranged on the first assembly ring on one side of the first ring plate, the second input bearing is on the same side of the first face tooth, and an outer wall of the first assembly ring is rotationally connected with an inner wall of the third assembly ring through the second input bearing.

[0017] The output face gear assembly further comprises a second output bearing arranged on the second assembly ring on one side of the second ring plate, the second output bearing is on the same side of the second face tooth, and an outer wall of the second assembly ring is rotationally connected with an inner wall of the third assembly ring through the second output bearing.

[0018] The inner wall of the third assembly ring is provided with a first distance pad clamped between the second input bearing and the second output bearing.

[0019] Optionally, a first assembly hole is formed through the third assembly ring along the central axis direction of the third assembly ring, the planetary face gear assembly further comprises a planet wheel shaft arranged in the first assembly hole, and a first planet bearing and a second planet bearing are arranged at intervals on the planet wheel shaft, the central axis of the planet wheel shaft is perpendicular to the central axis of the third assembly ring, the planet wheel is located in the first assembly hole and is rotationally connected to the planet wheel shaft through the first planet bearing and the second planet bearing, and an outer diameter of the planet wheel is greater than a length of the first assembly hole.

[0020] A second distance pad is arranged between the first planet bearing and the second planet bearing, and a third distance pad is arranged between the planet wheel and an inner hole wall of the first assembly hole, and the second distance pad and the third distance pad are arranged on the planet wheel shaft.

[0021] Optionally, a second assembly hole is formed through the annular housing along a direction perpendicular to the central axis of the third assembly ring, the speed-regulating face gear assembly further comprises a gear shaft and a bearing arranged in the second assembly hole, the gear shaft is rotationally connected to the inner hole wall of the second assembly hole through the bearing, the cylindrical gear is arranged on the gear shaft, and the cylindrical gear is in meshing connection with the third face gear.

[0022] The planetary face gear assembly further comprises a support bearing, the third face gear is located on a plate surface on one side of the third ring plate, an outer ring wall of the third assembly ring extends horizontally to form a third limiting ring on the other side of the third ring plate, a fourth limiting ring is arranged on an inner surface of the first end cover, and the outer ring wall of the third limiting ring is rotationally connected to the inner ring wall of the fourth limiting ring through the support bearing.

[0023] Optionally, the bearing comprises a first support bearing and a second support bearing arranged at intervals along the length direction of the gear shaft, an inner distance pad is arranged between the inner ring of the first support bearing and the inner ring of the second support bearing, the inner distance pad is fixed on the gear shaft, an outer distance pad is arranged between the outer ring of the first support bearing and the outer ring of the second support bearing, and the outer distance pad is fixed on the inner hole wall of the second assembly hole.

[0024] A plurality of planet wheels are arranged along the circumferential direction of the third assembly ring, and a plurality of speed-regulating face gear assemblies are arranged along the circumferential direction of the planet carrier.

[0025] The application further discloses a stepless speed-regulating method, which adopts the face gear stepless speed-regulating transmission device.

[0026] The rotation speeds of the first face gear, the second face gear and the planet carrier are acquired respectively within a preset sampling time, and a current transmission ratio of the gear transmission device is calculated according to the transmission structure of the first face gear, the second face gear and the planet carrier, and a function expression of the transmission ratio of the gear transmission device is:

[0027]

[0028] In the formula, is the rotation speed of the first face gear, is the rotation speed of the second face gear, is the rotation speed of the planet carrier; is the transmission ratio of the conversion mechanism;

[0029] The external torques borne by the first face gear, the second face gear and the planet carrier are synchronously acquired within the same sampling time, and a stepless speed regulation model related to the torques and the transmission ratio is established in combination with the current transmission ratio of the gear transmission device, and a function expression of the stepless speed regulation model is:

[0030]

[0031] In the formula, is the external torque borne by the first face gear, is the external torque borne by the second face gear, is the external torque borne by the planet carrier;

[0032] The running data of the work load including the torques and the rotation speeds are acquired in real time, and a target transmission ratio is calculated based on a preset algorithm;

[0033] The current transmission ratio of the gear transmission device and the target transmission ratio are compared, if there is a deviation between the current transmission ratio of the gear transmission device and the target transmission ratio, the output torques of the power input device and the load speed regulator are dynamically adjusted based on the stepless speed regulation model to perform stepless speed regulation until the current transmission ratio of the gear transmission device is consistent with the target transmission ratio.

[0034] Compared with the prior art, the face gear stepless speed regulation transmission device and the stepless speed regulation method provided by the embodiment of the present application have the following beneficial effects:

[0035] The power input device is used as a power source to drive the first face gear to rotate, and the planet gears on the planet carrier are engaged with the first face gear and the second face gear respectively, so that the rotation of the first face gear can drive the second face gear to rotate synchronously. The load governor can drive the planet carrier to rotate through the engagement of the cylindrical gear and the third face gear, so that the planet gears on the planet carrier can both rotate around their own axes and revolve around the planet carrier. Therefore, when the power input device drives the first face gear and the second face gear to transmit power, the planet carrier is driven to rotate by the load governor to limit the rotation of the planet gears, so as to disturb the power transmission between the first face gear and the second face gear, change the rotation speed of the first face gear transmitted to the second face gear, realize variable transmission ratio, and realize stepless speed regulation within a certain range. The face gear and the cylindrical gear are matched, the axial installation error is not sensitive, the machining and installation difficulty is reduced, large power transmission can be realized in limited layout space, and the self-adaptive stepless speed regulation capability is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0036] The technical solutions of the present application will be further described in detail below with reference to the drawings and examples, and the drawings show:

[0037] Figure 1 The driving structure schematic diagram of the face gear stepless speed regulation transmission device provided by the embodiment of the present application is shown in the figure.

[0038] Figure 2 The overall assembly structure schematic diagram of the face gear stepless speed regulation transmission device provided by the embodiment of the present application is shown in the figure.

[0039] Figure 3 The structure schematic diagram of the housing assembly provided by the embodiment of the present application is shown in the figure.

[0040] Figure 4 The structure schematic diagram of the first face gear provided by the embodiment of the present application is shown in the figure.

[0041] Figure 5 The structure schematic diagram of the second face gear provided by the embodiment of the present application is shown in the figure.

[0042] Figure 6 The assembly structure schematic diagram of the planet carrier, the planet gears and the third face gear provided by the embodiment of the present application is shown in the figure.

[0043] Figure 7 The structure schematic diagram of the speed regulation face gear assembly provided by the embodiment of the present application is shown in the figure.

[0044] Figure 8 The structure schematic diagram of the planet carrier and the assembly of multiple speed regulation face gear assemblies provided by the embodiment of the present application is shown in the figure.

[0045] The signs in the drawings represent as follows:

[0046] 1. Housing assembly; 11. Annular outer shell; 12. First end cap; 121. First limiting ring; 122. Fourth limiting ring; 13. Second end cap; 131. Second limiting ring; 14. First screw; 15. Second screw; 16. First sealing ring; 17. Second sealing ring; 18. Second assembly hole; 2. First face gear; 21. First assembly ring; 211. First internal meshing tooth; 22. First ring plate; 23. First face tooth; 24. First input bearing; 25. Second input bearing; 3. Second face gear; 31. Second assembly ring; 311. Second internal meshing tooth; 32. Second ring plate; 33. Second face tooth; 34. First output shaft 35. Second output bearing; 4. Planetary carrier; 41. Third assembly ring; 411. First distance shim; 412. First assembly hole; 413. Planetary gear shaft; 414. First planetary bearing; 415. Second planetary bearing; 416. Third limit ring; 42. Third ring plate; 43. Second distance shim; 44. Third distance shim; 45. Support bearing; 5. Third face gear; 51. Shear bolt; 6. Planetary gear; 7. Power input device; 8. Load speed regulator; 9. Speed ​​regulating face gear assembly; 91. Cylindrical gear; 92. Gear shaft; 93. First support bearing; 94. Second support bearing; 95. Inner distance shim; 96. Outer distance shim. Detailed Implementation

[0047] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0048] This invention discloses a face gear continuously variable speed transmission device, such as... Figures 1-3 As shown, the system includes a face gear transmission module and a face gear speed regulation module. The face gear transmission module includes a housing assembly 1, and an input face gear assembly, an output face gear assembly, and a planetary face gear assembly integrated on the housing assembly 1. The input face gear assembly includes a first face gear 2, and the output face gear assembly includes a second face gear 3. The tooth surfaces of the first face gear 2 and the second face gear 3 are arranged opposite to each other. The planetary face gear assembly includes a planet carrier 4 disposed between the first face gear 2 and the second face gear 3, a third face gear 5 fixedly disposed on the planet carrier 4, and a planetary gear 6 rotatably disposed on the planet carrier 4. The first face gear 2 meshes with the second face gear 3 through the planetary gear 6. The face gear speed regulation module includes a power input device 7, a load speed regulator 8, and a speed regulating face gear assembly 9 disposed on the housing assembly 1. The power input device 7 is connected to the first face gear 2. The speed regulating face gear assembly 9 includes a cylindrical gear 91, which meshes with the third face gear 5, and the load speed regulator 8 is connected to the cylindrical gear 91.

[0049] By the implementation of the above-mentioned gear transmission device embodiment, the power input device 7 is used as a power source to drive the first face gear 2 to rotate, and the planetary gear 6 on the planet carrier 4 is respectively engaged with the first face gear 2 and the second face gear 3, so that the rotation of the first face gear 2 can drive the second face gear 3 to rotate synchronously. The load governor 8 can drive the planet carrier 4 to rotate through the engagement of the cylindrical gear 91 and the third face gear 5, so that the planetary gear 6 on the planet carrier 4 can both rotate around its own axis and revolve around the planet carrier 4. Therefore, when the power input device 7 drives the first face gear 2 and the second face gear 3 to transmit power, the planet carrier 4 is driven to rotate by the load governor 8 to limit the rotation of the planetary gear 6, so as to disturb the power transmission between the first face gear 2 and the second face gear 3, change the rotation speed of the first face gear 2 transmitted to the second face gear 3, realize variable transmission ratio, and realize stepless speed regulation within a certain range.

[0050] As described above, the planetary gear 6 is also preferably a cylindrical gear, and through the rigid engagement of the first face gear 2, the second face gear 3 and the planetary gear 6, and the rigid engagement of the cylindrical gear 91 and the third face gear 5, the input power with high rotation speed and small torque is reduced in speed and reversed to output power with low rotation speed and large torque, and the full-tooth-surface engagement state is maintained throughout the speed regulation process, which not only retains the core advantage of high gear transmission efficiency, but also realizes the dynamic speed regulation function that traditional rigid gearboxes cannot have. At the same time, the transmission mode of the cylindrical gear and the face gear engagement has good stability in the transmission process, has sufficient tooth surface contact, makes the power transmission relatively smooth, reduces energy loss, reduces vibration and impact during engagement, and enables the gear face gear transmission module to realize high-power transmission in limited layout space, has self-adaptive stepless speed regulation capability, and can output power to the load with higher efficiency. Furthermore, the cylindrical gear in the face gear transmission pair is not sensitive to axial installation error, has constant transmission ratio and stable transmission ratio, has strong resistance to processing error and installation error, and because the spur gear in the face gear pair does not bear axial force during transmission, the support mode is simple, the number of bearings can be reduced or smaller bearings can be selected according to needs, and installation and debugging are simple. It is not necessary to match processing and replacement, although the fatigue speed of the cylindrical gear increases, but the smaller size makes it easier to replace and maintain, and the processing cost is low, which greatly reduces the maintenance cost.

[0051] Further, the first face gear 2 includes a first assembly ring 21, and a first ring plate 22 integrally formed on the outer wall of the first assembly ring 21, and a first face tooth 23 is formed on the edge of one side plate surface of the first ring plate 22 along the circumferential direction thereof.

[0052] The second face gear 3 comprises a second assembly ring 31, and a second ring plate 32 integrally formed on the outer wall of the second assembly ring 31, and the second ring plate 32 is provided with corresponding second face teeth 33 on the plate surface edge opposite to the first face teeth 23;

[0053] The first assembly ring 21 and the second assembly ring 31 are arranged in close proximity along the same central axis, and the transmission gap for the planetary gear 6 is formed between the first ring plate 22 and the second ring plate 32.

[0054] Through the implementation of the above-mentioned gear transmission device embodiment, the thickness of the first ring plate 22 is less than the length of the first assembly ring 21, and the thickness of the second ring plate 32 is less than the length of the second assembly ring 31. Therefore, by using the structure of the first face gear 2 and the second face gear 3, the first face gear 2 and the second face gear 3 can be arranged compactly by arranging the first assembly ring 21 in close proximity to the second assembly ring 31 along the same central axis. At this time, sufficient space can still be maintained between the first ring plate 22 and the second ring plate 32 for the installation of the planet carrier 4, and the first face teeth 23 on the first ring plate 22 can be engaged with the second face teeth 33 on the second ring plate 32 through the planetary gear 6 on the planet carrier 4, so that high-power transmission can be achieved in a limited layout space, greatly reducing the size and weight of the transmission device. In addition, the structure of the first ring plate 22 and the second ring plate 32 arranged opposite to each other can produce opposite expansion when the gear transmission device operates to cause internal heating, so that the first ring plate 22 and the second ring plate 32 automatically compensate for the gap change through the space between them to maintain constant engagement pre-tightening force on the planetary gear 6.

[0055] Further, as shown in Figure 4 and Figure 5 The housing assembly 1 comprises an annular housing 11, a first end cover 12 arranged in a ring hole on one side of the annular housing 11, and a second end cover 13 arranged in a ring hole on the other side of the annular housing 11, the first end cover 12 is provided with a first connecting hole matched with the input shaft of the power input device 7, and the second end cover 13 is provided with a second connecting hole matched with the load output shaft, and the first connecting hole, the first assembly ring 21, the second assembly ring 31 and the second connecting hole are coaxial;

[0056] The inner wall of the first assembly ring 21 is provided with a first inner engagement tooth 211 matched with the input shaft of the power input device 7, and the inner wall of the second assembly ring 31 is provided with a second inner engagement tooth 311 matched with the load output shaft.

[0057] Through the implementation of the above-mentioned gear transmission device embodiment, the annular shell 11 serves as the main body of the entire face gear stepless speed regulation transmission device, and by arranging the first end cover 12 and the second end cover 13 on both sides of the annular shell 11, the ring hole on the corresponding side of the shell is tightly matched, which can ensure the sealing of the inside of the final face gear stepless speed regulation transmission device, so as to provide strong protection and support, and ensure the stability and safety of the internal components during operation. The first connecting hole on the first end cover 12 is matched with the input shaft of the power inputter 7, which ensures the accurate centering and stable connection of the power input shaft and the first face gear 2, and the second connecting hole on the second end cover 13 is matched with the load output shaft, which also ensures the accurate centering and stable connection of the load output shaft and the second face gear 3. The coaxial axes of the first connecting hole, the first assembly ring 21, the second assembly ring 31 and the second connecting hole can ensure the concentricity of the entire shell assembly 1 after assembly, which helps to ensure the transmission efficiency and reduce vibration. In addition, the first inner engagement teeth 211 on the first assembly ring 21 are matched with the input shaft of the power inputter 7 to strengthen the connection between the power inputter 7 and the first face gear 2, and the second inner engagement teeth 311 on the second assembly ring 31 are matched with the load output shaft to strengthen the connection between the second face gear 3 and the output load, so that the first face gear 2 can efficiently transmit power from the power inputter 7 to the output load.

[0058] Further, the shell assembly 1 further comprises a first fixing member and a second fixing member, the first fixing member comprises a plurality of first screws 14 distributed along the circumferential direction of the first end cover 12, and the first end cover 12 is connected with the annular shell 11 through the first screws 14, and the second fixing member comprises a plurality of second screws 15 distributed along the circumferential direction of the second end cover 13, and the second end cover 13 is connected with the annular shell 11 through the second screws 15.

[0059] The first connecting hole is provided with a first sealing ring 16, and the second connecting hole is provided with a second sealing ring 17.

[0060] By implementing the above-mentioned gear transmission device embodiments, the connection of the first end cover 12, the second end cover 13 and the annular housing 11 is made more secure by using the first fixing member and the second fixing member, i.e. by using the plurality of first screws 14 and the plurality of second screws 15, which helps to prevent loosening of the components due to vibration or pressure during operation, and the assembly and disassembly process is more convenient, without the need for complex tools or special assembly techniques, and a common wrench can be used to complete the process. In addition, by providing sealing rings in the first connecting hole and the second connecting hole, a seal is formed between the first end cover 12 and the second end cover 13 and the corresponding connecting shaft when connecting the power input device 7 and the output load, thereby ensuring the airtightness of the inside of the annular housing 11, which can effectively prevent external liquids and gases from entering the inside of the gear transmission device, so as to protect the internal moving parts from corrosion and wear. Preferably, lubricating oil can be added in the annular housing 11 after installation to provide lubrication for the internal gears and bearings.

[0061] Further, the input face gear assembly further comprises a first input bearing 24 arranged on the first assembly ring 21 on one side of the first ring plate 22, the first input bearing 24 being non-adjacent to the first face tooth 23, and a first limiting ring 121 is arranged on the inner surface of the first end cover 12, and the outer wall of the first assembly ring 21 is rotatably connected to the inner wall of the first limiting ring 121 through the first input bearing 24.

[0062] The output face gear assembly further comprises a first output bearing 34 arranged on the second assembly ring 31 on one side of the second ring plate 32, the first output bearing 34 being non-adjacent to the second face tooth 33, and a second limiting ring 131 is arranged on the inner surface of the second end cover 13, and the outer wall of the second assembly ring 31 is rotatably connected to the inner wall of the second limiting ring 131 through the first output bearing 34.

[0063] By implementing the above gear transmission device embodiment, since the first end cover 12 and the second end cover 13 are respectively fixed on the annular housing 11, by using the above structure, in essence, the first face gear 2 is rotatably connected with the annular housing 11 through the first input bearing 24, and the second face gear 3 is rotatably connected with the annular housing 11 through the first output bearing 34. The first input bearing 24 and the first output bearing 34 serve as intermediate parts, which can firmly mount the first face gear 2 and the second face gear 3 in the annular housing 11, thereby providing precise and stable radial and axial support for the first face gear 2 and the second face gear 3. At the same time, when the power is transmitted between the first face gear 2 and the second face gear 3 through the meshing of the planetary gear 6, radial force (perpendicular to the central axis) and axial force (in the direction of the central axis) will be generated. The first input bearing 24 and the second input bearing 25 can effectively transmit and disperse these forces to the annular housing 11, preventing the first face gear 2 and the second face gear 3 from bearing excessive bending stress or displacement, and ensuring the transmission of high power. In addition, by arranging the first input bearing 24 on the non-same side of the first face gear 23 and the first output bearing 34 on the non-same side of the second face gear 33, the structure of the first face gear 2 and the second face gear 3 meshing through the planetary gear 6 is avoided, thereby optimizing the structural layout of the first face gear 2 and the second face gear 3 in the limited space, and improving the overall space utilization.

[0064] Further, as shown in Figs. 1-3, Figure 2 and Figure 6 The planetary carrier 4 includes a third assembly ring 41 and a third ring plate 42 integrally formed on the outer wall of the third assembly ring 41. The first assembly ring 21, the second assembly ring 31, and the third assembly ring 41 share the central axis, and the third face gear 5 is arranged on the third ring plate 42 through shear-resistant bolts 51.

[0065] The input face gear assembly further includes a second input bearing 25 arranged on the first assembly ring 21 on one side of the first ring plate 22. The second input bearing 25 is on the same side of the first face gear 23, and the outer wall of the first assembly ring 21 is rotatably connected with the inner wall of the third assembly ring 41 through the second input bearing 25.

[0066] The output face gear assembly further includes a second output bearing 35 arranged on the second assembly ring 31 on one side of the second ring plate 32. The second output bearing 35 is on the same side of the second face gear 33, and the outer wall of the second assembly ring 31 is rotatably connected with the inner wall of the third assembly ring 41 through the second output bearing 35.

[0067] The inner wall of the third assembly ring 41 is provided with a first distance pad 411 clamped between the second input bearing 25 and the second output bearing 35.

[0068] Through the implementation of the above-mentioned gear transmission device embodiment, the common central axis arrangement of the first assembly ring 21, the second assembly ring 31, and the third assembly ring 41 can improve the transmission structure stiffness between the first face gear 2, the second face gear 3, and the planet carrier 4, so as to reduce the deformation under the action of load. At the same time, the third face gear 5 is fixed on the third ring plate 42 by using the shear bolt 51, which is convenient for the assembly and replacement of the third face gear 5.

[0069] In addition, the cooperation structure of the first face gear 2, the second face gear 3, and the planet carrier 4 is used to integrate the first face gear 2 and the second face gear 3 in the ring of the third assembly ring 41. Since the first face gear 2 is rotatably connected with the annular housing 11 through the first input bearing 24, and the second face gear 3 is rotatably connected with the annular housing 11 through the first output bearing 34, the radial and axial positions of the first face gear 2 and the second face gear 3 are positioned on the fixed annular housing 11, which prevents the radial jump or axial displacement of the first face gear 2 and the second face gear 3 relative to the annular housing 11, and ensures the axial position of the first face gear 2 and the second face gear 3. At the same time, the first face gear 2 is rotatably connected with the planet carrier 4 through the second input bearing 25, and the second face gear 3 is rotatably connected with the planet carrier 4 through the second output bearing 35, which allows the first face gear 2 and the second face gear 3 to rotate smoothly relative to the rotating planet carrier 4, while restricting the axial and radial displacement of the first face gear 2 and the second face gear 3 relative to the planet carrier 4, and ensuring the stable center distance of the first face gear 2 and the second face gear 3 meshing with the planet gear 6. Therefore, the double bearings on the first face gear 2 and the second face gear 3 work together to greatly limit the radial and axial jump of the first face gear 2 and the second face gear 3, significantly reduce the vibration, noise, and impact load caused by the change of center distance or axial deviation, make the transmission more stable and quiet, and make the entire transmission structure more compact and save space.

[0070] As described above, in order to ensure the realization of large power transmission in limited layout space, the first face gear 2 and the second face gear 3 are arranged adjacent to each other along the same central axis. The first distance pad 411 is arranged to be clamped between the two bearings adjacent to each other on the first face gear 2 and the second face gear 3, so as to maintain the axial pre-tightening force required for installing the second input bearing 25 and the second output bearing 35, eliminate the sliding friction caused by the axial displacement between the second input bearing 25 and the second output bearing 35, and ensure the relative position of the first face gear 2 and the second face gear 3 in the axial direction, thereby ensuring that the first face gear 2 and the second face gear 3 work in the best state.

[0071] Further, the third assembly ring 41 is provided with a first assembly hole 412 penetrating along the central axis direction thereof, the planetary gear assembly further comprises a planetary shaft 413 arranged in the first assembly hole 412, and a first planetary bearing 414 and a second planetary bearing 415 arranged at intervals on the planetary shaft 413, the central axis of the planetary shaft 413 is perpendicular to the central axis of the third assembly ring 41, the planetary gear 6 is arranged in the first assembly hole 412 and rotationally connected with the planetary shaft 413 through the first planetary bearing 414 and the second planetary bearing 415, and the outer diameter of the planetary gear 6 is greater than the length of the first assembly hole 412;

[0072] The second distance pad 43 is arranged between the first planetary bearing 414 and the second planetary bearing 415, and the third distance pad 44 is arranged between the planetary gear 6 and the inner wall of the first assembly hole 412, both the second distance pad 43 and the third distance pad 44 are arranged on the planetary shaft 413.

[0073] Through the implementation of the above-mentioned gear transmission device embodiment, the planetary gear 6 is arranged in the first assembly hole 412 of the third assembly ring 41 and can rotate along the planetary shaft 413 to match the structural characteristics of the face gear, so that the first face gear 2 is engaged with the second face gear 3 through the planetary gear 6 on the planet carrier 4, thereby efficiently transmitting power from the power input device 7 to the output load, and the structure of the entire gear face gear transmission module is compact, and high-power transmission can be realized in a limited layout space. Among them, since the planetary gear 6 is a cylindrical gear, its size is small and its fatigue speed is fast, and it needs to bear the force from the first face gear 2 and the second face gear 3 during stepless speed regulation. Therefore, by using the double bearing arrangement of the first planetary bearing 414 and the second planetary bearing 415, the force can be dispersed to two support points, thereby reducing the load of a single bearing to reduce wear and fatigue and improve the carrying capacity and service life of the planetary gear. At the same time, by arranging the second distance pad 43, support and positioning can be formed between the first planetary bearing 414 and the second planetary bearing 415, and by arranging the third distance pad 44, the planetary gear 6 is prevented from directly contacting the inner wall of the first assembly hole 412, thereby avoiding excessive wear of the planetary gear 6 due to hard collision or improper engagement pressure.

[0074] In addition, since the load speed regulator 8 is engaged with the third face gear 5 through the cylindrical gear 91, it can drive the planet carrier 4 to rotate, so that the planetary gear 6 on the planet carrier 4 can both rotate and revolve with the planet carrier 4, thereby the transmission ratio between the first face gear 2 and the second face gear 3 can be adjusted by changing the rotation speed of the planetary gear 6.

[0075] Further, in combination with Figure 2 and Figure 7As shown, the second assembly hole 18 is formed on the annular housing 11 in a direction perpendicular to the central axis of the third assembly ring 41, the speed regulating face gear assembly 9 further comprises a gear shaft 92 and a bearing part arranged in the second assembly hole 18, the gear shaft 92 is rotatably connected with the inner wall of the second assembly hole 18 through the bearing part, the cylindrical gear 91 is arranged on the gear shaft 92, and the cylindrical gear 91 is in meshing connection with the third face gear 5;

[0076] The planetary face gear assembly further comprises a bracket bearing 45, the third face gear 5 is located on the plate surface on one side of the third ring plate 42, the outer wall of the third assembly ring 41 extends horizontally to the other side of the third ring plate 42 to form a third limiting ring 416, and the inner surface of the first end cover 12 is provided with a fourth limiting ring 122, and the outer wall of the third limiting ring 416 is rotatably connected with the inner wall of the fourth limiting ring 122 through the bracket bearing 45.

[0077] Through the implementation of the above-mentioned face gear stepless speed regulating transmission device embodiment, the second assembly hole 18 is arranged on the annular housing 11 to facilitate the rapid positioning and installation of the speed regulating face gear assembly 9, and the annular housing 11 forms protection for the speed regulating face gear assembly 9. In addition, the structure of the third limiting ring 416 and the fourth limiting ring 122 cooperates, which is essentially to rotatably connect the third face gear 5 with the annular housing 11 through the bracket bearing. The bracket bearing 45 serves as an intermediate part, which can firmly install the third face gear 5 in the annular housing 11, thereby providing accurate and stable radial and axial support for the third face gear 5. At the same time, when the cylindrical gear 91 driven by the load speed regulator 8 meshes with the third face gear 5 to transmit power, radial force (perpendicular to the central axis) and axial force (in the direction of the central axis) will be generated on the planet carrier 4, and the bracket bearing 45 can effectively transmit and disperse these forces to the annular housing 11, preventing the third face gear 5 from bearing excessive bending stress or displacement, and ensuring the transmission of high power. In addition, the bracket bearing 45 is not on the same side of the third face gear 5, which avoids the meshing structure of the third face gear 5 and the cylindrical gear 91, thereby optimizing the structure layout of the load speed regulation in a limited space and improving the overall space utilization.

[0078] Further, in combination with Figures 6-8 As shown, the bearing part comprises a first support bearing 93 and a second support bearing 94 arranged at intervals along the length direction of the gear shaft 92, an inner distance pad 95 is arranged between the inner rings of the first support bearing 93 and the second support bearing 94, the inner distance pad 95 is fixed on the gear shaft 92, an outer distance pad 96 is arranged between the outer rings of the first support bearing 93 and the second support bearing 94, and the outer distance pad 96 is fixed on the inner wall of the second assembly hole 18;

[0079] A plurality of planetary gears 6 are arranged along the circumferential direction of the third assembly ring 41, and a plurality of speed regulating face gear assemblies 9 are arranged along the circumferential direction of the planet carrier 4.

[0080] Through the implementation of the above-mentioned face gear stepless speed regulation transmission device embodiment, since the cylindrical gear 91 is usually small in size and fast in fatigue speed, it needs to bear the force from the load speed regulator 8 and the third face gear 5 during the stepless speed regulation process. By using the double bearing arrangement of the first support bearing 93 and the second support bearing 94, the forces can be dispersed to two support points, thereby reducing the load of a single bearing to reduce wear and fatigue, improve the load capacity and service life of the bearing. On this basis, by using the arrangement of the inner distance pad 95 and the outer distance pad 96, support and positioning can be formed between the first support bearing 93 and the second support bearing 94 in the second assembly hole 18, and direct contact of the first support bearing 93 and the second support bearing 94 is prevented, avoiding excessive wear of the first support bearing 93 and the second support bearing 94 due to hard collision or improper meshing pressure.

[0081] In addition, by arranging a plurality of planetary gears 6 along the circumferential direction of the third assembly ring 41, and arranging a plurality of speed regulation face gear assemblies 9 along the circumferential direction of the planet carrier 4, that is, the plurality of planetary gears 6 are evenly distributed around the central axis of the first face gear 2 and the second face gear 3 and simultaneously meshed with the first face gear 2 and the second face gear 3; the plurality of cylindrical gears 91 are evenly distributed around the central axis of the planet carrier 4 and simultaneously meshed with the third face gear 5, and all can play a coaxial torque shunting role, thereby being able to transmit greater power in a narrow space.

[0082] The application also discloses a stepless speed regulation method using the above-mentioned face gear stepless speed regulation transmission device, and the stepless speed regulation method comprises the following steps:

[0083] In a preset sampling time, the rotation speeds of the first face gear 2, the second face gear 3 and the planet carrier 4 are obtained respectively, and the transmission ratio of the gear transmission device at the current time is calculated according to the transmission structure of the first face gear 2, the second face gear 3 and the planet carrier 4, and the function expression of the transmission ratio of the gear transmission device is as follows:

[0084]

[0085] In the formula, ω1 is the rotation speed of the first face gear 2, ω2 is the rotation speed of the second face gear 3, ω4 is the rotation speed of the planet carrier 4, and K is the transmission ratio of the conversion mechanism.

[0086] In the same sampling time, the external torques borne by the first face gear 2, the second face gear 3 and the planet carrier 4 are synchronously obtained, a stepless speed regulation model related to the torque and the transmission ratio is established in combination with the transmission ratio of the gear transmission device at the current time, and the function expression of the stepless speed regulation model is as follows:

[0087] ​​​​

[0088] In the formula, is the external torque received by the first face gear 2, is the external torque received by the second face gear 3, is the external torque received by the planet carrier 4;

[0089] Real-time acquisition of operating data of the work load including torque and rotational speed, and calculation of the target transmission ratio based on a preset algorithm;

[0090] Comparison of the transmission ratio of the face gear stepless speed regulation transmission device at the current time and the target transmission ratio, if there is a deviation between the transmission ratio of the gear transmission device at the current time and the target transmission ratio, then the output torque of the power inputter 7 and the load speed regulator 8 is dynamically adjusted based on the stepless speed regulation model for stepless speed regulation until the transmission ratio of the gear transmission device at the current time is consistent with the target transmission ratio.

[0091] Through the implementation of the above stepless speed regulation method embodiment, the power output of the power inputter 7 and the load speed regulator 8 is used to real-time collaborative control the first face gear 2, the second face gear 3 and the planet carrier 4, and to realize dynamic stepless adjustment of the variable transmission ratio. That is, the rotational speeds of the first face gear 2, the second face gear 3 and the planet carrier 4 are synchronously collected in a preset sampling period, and the current transmission ratio is accurately calculated based on the transmission structure, at the same time, the external torques received by the first face gear 2, the second face gear 3 and the planet carrier 4 are collected, and a stepless speed regulation model of torque-transmission ratio correlation is constructed in combination with the transmission ratio. Based on the stepless speed regulation model, the target transmission ratio can be quickly calculated according to the real-time load (torque / rotational speed) data through a preset algorithm, and when it is detected that there is a deviation between the current transmission ratio and the target value, the output torque of the power inputter 7 and the load speed regulator 8 is immediately dynamically adjusted to realize millisecond-level response. Thus, the problem of power interruption in traditional mechanical gear shifting is effectively eliminated, and through continuous adjustment of the torque distribution ratio of the first face gear 2, the second face gear 3 and the planet carrier 4, the transmission ratio can realize smooth stepless transition, avoid gear shifting impact, and significantly improve the power transmission smoothness. At the same time, based on the real-time matching of the optimal transmission ratio, the system always operates in the high-efficiency operating interval, reducing mechanical friction loss and invalid energy consumption. The speed regulation process is completely based on mathematical model and real-time data driving, and the control accuracy can be continuously optimized through software iteration, providing a high-adaptability and low-energy-consumption speed regulation solution for power systems in the fields of new energy vehicles, aviation, wind power generation, etc.

[0092] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features can be replaced by equivalents; all these modifications and replacements shall belong to the protection scope of the present application.

Claims

1. A face gear infinitely variable speed transmission device, characterized by, The face gear stepless speed regulation transmission device comprises: A face gear transmission module comprises a housing assembly, an input face gear assembly, an output face gear assembly and a planetary face gear assembly integrally arranged on the housing assembly, the input face gear assembly comprises a first face gear, the output face gear assembly comprises a second face gear, the tooth surfaces of the first face gear and the second face gear are oppositely arranged, the planetary face gear assembly comprises a planet carrier arranged between the first face gear and the second face gear, a third face gear fixedly arranged on the planet carrier, and a planet wheel rotatably arranged on the planet carrier, and the first face gear is engaged with the second face gear through the planet wheel; A face gear speed regulation module comprises a power input device, a load speed regulator, and a speed regulation face gear assembly arranged on the housing assembly, the power input device is connected with the first face gear, the speed regulation face gear assembly comprises a cylindrical gear, the cylindrical gear is engaged with the third face gear, and the load speed regulator is connected with the cylindrical gear; The first face gear comprises a first assembly ring and a first ring plate integrally formed on the outer wall of the first assembly ring, a first face is formed on the edge of one side of the plate surface of the first ring plate along the circumferential direction thereof; The second face gear comprises a second assembly ring and a second ring plate integrally formed on the outer wall of the second assembly ring, a corresponding second face is formed on the edge of the plate surface of the second ring plate opposite to the first face gear; The first assembly ring and the second assembly ring are arranged in close proximity along the same central axis, and a transmission gap for the planet wheel is formed between the first ring plate and the second ring plate; The housing assembly comprises an annular housing, a first end cover arranged in a ring hole on one side of the annular housing, and a second end cover arranged in a ring hole on the other side of the annular housing, a first connecting hole matched with the input shaft of the power input device is arranged on the first end cover, a second connecting hole matched with the load output shaft is arranged on the second end cover, and the first connecting hole, the first assembly ring, the second assembly ring and the second connecting hole are coaxial; First internal engagement teeth matched with the input shaft of the power input device are arranged on the inner wall of the first assembly ring, and second internal engagement teeth matched with the load output shaft are arranged on the inner wall of the second assembly ring.

2. The face gear infinitely variable transmission of claim 1, wherein: The housing assembly further comprises a first fixing member and a second fixing member, the first fixing member comprises a plurality of first screws distributed along the circumferential direction of the first end cover, and the first end cover is connected with the annular housing through the first screws, the second fixing member comprises a plurality of second screws distributed along the circumferential direction of the second end cover, and the second end cover is connected with the annular housing through the second screws; A first sealing ring is arranged in the first connecting hole, and a second sealing ring is arranged in the second connecting hole.

3. The face gear infinitely variable transmission of claim 2, wherein: The input face gear assembly further comprises a first input bearing arranged on the first assembly ring on one side of the first ring plate, the first input bearing is on the opposite side of the first face gear, the inner surface of the first end cover is provided with a first limiting ring, and the outer wall of the first assembly ring is rotationally connected with the inner wall of the second limiting ring through the first input bearing; The output face gear assembly further comprises a first output bearing arranged on the second assembly ring on one side of the second ring plate, the first output bearing is on the opposite side of the second face gear, the inner surface of the second end cover is provided with a second limiting ring, and the outer wall of the second assembly ring is rotationally connected with the inner wall of the second limiting ring through the first output bearing.

4. The face gear infinitely variable transmission of claim 1, wherein: The planet carrier comprises a third assembly ring and a third ring plate integrally formed on the outer wall of the third assembly ring, the first assembly ring, the second assembly ring and the third assembly ring have a common central axis, and the third face gear is arranged on the third ring plate through shear bolts; The input face gear assembly further comprises a second input bearing arranged on the first assembly ring on one side of the first ring plate, the second input bearing is on the same side of the first face gear, and the outer wall of the first assembly ring is rotationally connected with the inner wall of the third assembly ring through the second input bearing; The output face gear assembly further comprises a second output bearing arranged on the second assembly ring on one side of the second ring plate, the second output bearing is on the same side of the second face gear, and the outer wall of the second assembly ring is rotationally connected with the inner wall of the third assembly ring through the second output bearing; The inner wall of the third assembly ring is provided with a first distance pad clamped between the second input bearing and the second output bearing.

5. The face gear infinitely variable transmission of claim 4, wherein: The third assembly ring is provided with a first assembly hole penetrating along the central axis direction thereof, the planet face gear assembly further comprises a planet shaft arranged in the first assembly hole, and a first planet bearing and a second planet bearing arranged at intervals on the planet shaft, the central axis of the planet shaft is perpendicular to the central axis of the third assembly ring, the planet gear is located in the first assembly hole and rotationally connected with the planet shaft through the first planet bearing and the second planet bearing, and the outer diameter of the planet gear is greater than the length of the first assembly hole; A second distance pad is arranged between the first planet bearing and the second planet bearing, and a third distance pad is arranged between the planet gear and the inner wall of the first assembly hole, and the second distance pad and the third distance pad are arranged on the planet shaft.

6. The face gear infinitely variable transmission of claim 5, wherein: The annular housing is provided with a second assembly hole penetrating along a direction perpendicular to the central axis of the third assembly ring, the speed regulating face gear assembly further comprises a gear shaft and a bearing arranged in the second assembly hole, the gear shaft is rotationally connected with the inner wall of the second assembly hole through the bearing, and the cylindrical gear is arranged on the gear shaft and is in meshing connection with the third face gear. The planetary gear assembly further comprises a support bearing, the third face gear is located on a plate surface on one side of the third ring plate, an outer wall of the third assembly ring extends horizontally to the other side of the third ring plate to form a third limiting ring, a fourth limiting ring is arranged on an inner surface of the first end cover, and an outer wall of the third limiting ring is rotationally connected with an inner wall of the fourth limiting ring through the support bearing.

7. The face gear infinitely variable transmission of claim 6, wherein: The bearing piece comprises a first support bearing and a second support bearing which are arranged at intervals along the length direction of the gear shaft, an inner distance pad is arranged between the inner ring of the first support bearing and the inner ring of the second support bearing, the inner distance pad is fixed on the gear shaft, an outer distance pad is arranged between the outer ring of the first support bearing and the outer ring of the second support bearing, and the outer distance pad is fixed on the inner wall of the second assembly hole; The planetary gears are arranged in the circumferential direction of the third assembly ring, and the speed-regulating face gear assemblies are arranged in the circumferential direction of the planetary carrier.

8. A continuously variable speed method using the face gear continuously variable speed transmission device according to any one of claims 1 to 7, characterized by, The stepless speed-regulating method comprises: The rotational speeds of the first face gear, the second face gear and the planetary carrier are acquired respectively within a preset sampling time, and the transmission ratio of the gear transmission device at the current time is calculated according to the transmission structure of the first face gear, the second face gear and the planetary carrier, and the function expression of the transmission ratio of the gear transmission device is: wherein is the rotational speed of the first face gear, is the rotational speed of the second face gear, is the rotational speed of the planet carrier; is the transmission ratio of the conversion mechanism; The external torques borne by the first face gear, the second face gear and the planetary carrier are synchronously acquired within the same sampling time, and the stepless speed-regulating model of the relationship between the torque and the transmission ratio is established in combination with the transmission ratio of the gear transmission device at the current time, and the function expression of the stepless speed-regulating model is: wherein T1 is the external torque on the first face gear, T2 is the external torque on the second face gear, T3 is the external torque on the planet carrier; The running data of the work load including the torque and the rotational speed are acquired in real time, and the target transmission ratio is calculated based on a preset algorithm; The transmission ratio of the gear transmission device at the current time and the target transmission ratio are compared, if there is a deviation between the transmission ratio of the gear transmission device at the current time and the target transmission ratio, the output torque of the power input device and the load speed regulator is dynamically adjusted based on the stepless speed-regulating model for stepless speed-regulating until the transmission ratio of the gear transmission device at the current time is consistent with the target transmission ratio.

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