Support unit and vehicle

Abstract

Support unit for an electrically assisted bicycle, including: a power output shaft designed to deliver power; a power input shaft designed to receive input power from a pedal crank mechanism and to transmit the power to the power output shaft; a speed control power device which is connected to the power output shaft via a first gear mechanism and is configured to control the speed of the power output shaft; and an auxiliary power device connected to the first gear mechanism via a second gear mechanism and configured to provide auxiliary power to the power output shaft;

Description

TECHNICAL AREA

[0001] The present disclosure relates to the technical field of vehicles and relates in particular to a support unit and a vehicle. BACKGROUND

[0002] In the prior art of electrically assisted bicycles, if a user pedals vigorously, causing the assistance unit to deliver a high torque, the speed control power device must generate a very high torque. Because the motor output power of the speed control power device is saturated at this point and cannot deliver any more torque, the pedaling feel for the user becomes soft, resulting in a relatively undesirable riding experience. SUMMARY

[0003] In a first aspect, embodiments of the present disclosure provide a support unit. The support unit comprises:

[0004] a power output shaft designed to deliver power;

[0005] a power input shaft which is configured to receive input power from a power input device and to transmit the power to the power output shaft;

[0006] a speed control power device which is connected to the power output shaft via a first gear mechanism and is configured to control the speed of the power output shaft; and an auxiliary power device connected to the first gear mechanism via a second gear mechanism and configured to provide auxiliary power to the power output shaft, wherein the support power device is connected to the speed control power device via a compensating gear mechanism, wherein, if an associated information about a power output to be delivered by the speed control power device exceeds a preset threshold, the support power device is able to set the speed control power device in rotation via the differential gear mechanism.

[0007] In the aforementioned support unit, the support power device is able to rotate the speed control power device via the compensating gear mechanism, thereby compensating for insufficient output power from the speed control power device and improving or eliminating the problem of a soft pedal feel.

[0008] In some embodiments, the associated information about power to be delivered by the speed control power device includes at least one of the following: an amount of torque to be delivered by the speed control power device, an amount of power to be delivered by the speed control power device, and an amount of energy to be supplied by the speed control power device.

[0009] In some embodiments, the amount of energy to be supplied by the speed control power device includes at least one of the following amounts: an amount of current to be supplied by the speed control power device.

[0010] In some embodiments, the associated information about power output by the speed control power device that exceeds a preset threshold includes at least one of the following pieces of information:

[0011] The torque to be delivered by the speed control power device is greater than a preset torque threshold;

[0012] The power output of the speed control power device is greater than a preset power threshold;

[0013] The current to be supplied by the speed control power device is greater than a preset current threshold.

[0014] In some embodiments, an operating mode of the assist unit comprises a gear-shifting mode and a fixed-gear mode. When the assist power device rotates the speed control power device via the differential mechanism, the assist unit is in fixed-gear mode. When the power transmission linkage through which the assist power device drives the speed control power device via the differential mechanism is disengaged, the assist unit is in gear-shifting mode.

[0015] In some embodiments, the support unit switches from fixed gear mode to gear shift mode in response to the support unit fulfilling a preset condition.

[0016] In some embodiments, in response to the support unit fulfilling the preset condition, this includes: in response to the operating state of the speed control power device fulfilling a

[0017] In some embodiments, “in response to the operating state of the speed control power device satisfying the preset condition” includes at least one of the following: in response to the torque output of the speed control power device being less than or equal to a preset torque value, and in response to the speed of the speed control power device being greater than or equal to a preset speed value.

[0018] In some embodiments, the support unit further comprises a switching device, and the switching device is configured to establish or disconnect the power transmission connection by which the support power device rotates the speed control power device via the differential gear mechanism.

[0019] In some embodiments, the switching device includes a clutch. In response to the assist unit meeting the preset condition, the clutch automatically disengages the power transmission linkage through which the assist power device rotates the speed control power device via the differential gear mechanism.

[0020] In some embodiments, the coupling includes a one-way bearing.

[0021] In some embodiments, the one-way bearing is connected to the output shaft of the speed control power device, and the differential gear mechanism is connected to the power input shaft via the one-way bearing.

[0022] In some embodiments, the translation ratio between power input and power output of the support unit is a constant value when the support unit is in fixed-gear mode.

[0023] In some embodiments, the transmission ratio between power input and power output of the support unit varies with the speed of the speed control power device when the support unit is in gear shift mode.

[0024] In some embodiments, the gear of the support unit increases to the extent that the speed of the speed control power device increases when the support unit is in gear shift mode.

[0025] In some embodiments, the differential gear mechanism comprises at least one of the following: a mechanical gear mechanism, a hydraulic gear mechanism, a magnetic gear mechanism, a hydrodynamic gear mechanism, and an electromagnetic gear mechanism.

[0026] In some embodiments, the mechanical transmission mechanism comprises at least one of the following: a gear transmission mechanism, a wheel transmission mechanism, and a worm gear mechanism.

[0027] In some embodiments, the gear mechanism comprises two gear wheels and a connecting element, wherein one gear wheel is connected to an output shaft of the speed control power device, another gear wheel is connected to an output shaft of the support power device, and the connecting element is connected to the two gear wheels to cause the two gear wheels to rotate together.

[0028] In some embodiments, the gear wheel comprises at least one of the following: a pulley and a sprocket.

[0029] The connecting element comprises at least one of the following: a belt and a chain.

[0030] In some embodiments, the first transmission mechanism comprises a gear transmission mechanism. The gear transmission mechanism comprises several gear elements, wherein the output shaft of the speed control power device is connected to one of the gear elements and the power output shaft is connected to another of the gear elements.

[0031] In some embodiments, the gear mechanism includes a planetary gear mechanism. The planetary gear mechanism comprises a sun gear, a ring gear, a planet gear set, and a planet carrier. The sun gear is arranged inside the ring gear. The planet gear set is arranged between an inner ring of the ring gear and an outer ring of the sun gear, and the planet gear set meshes with both the ring gear and the sun gear. The planet carrier is connected to a central section of the planet gears of the planet gear set. When the planet gears rotate, the planet carrier is set into rotation.

[0032] In some embodiments, the planetary gear set comprises several groups of planet gears. One group of planet gears is meshed with the sun gear, and another group of planet gears is meshed with the ring gear.

[0033] In some embodiments, a number of teeth of one group of planet gears is the same as, or different from, a number of teeth of another group of planet gears.

[0034] In some embodiments, the output shaft of the speed control power device is connected to the sun gear or the planet carrier.

[0035] In some embodiments, the power output shaft is connected to the planet carrier or the sun gear.

[0036] In some embodiments, the gear ring is connected to the power input shaft via the third gear mechanism.

[0037] In some embodiments, one of the sun gear and planet carrier is connected to the output shaft of the speed control power device, and the other is connected to the power output shaft.

[0038] In some embodiments, the gear ring is connected to the second gear mechanism via the fourth gear mechanism.

[0039] In some embodiments, the second transmission mechanism comprises a gear transmission mechanism. The gear transmission mechanism comprises several gear elements, with the output shaft of the support power device being connected to one of the gear elements and the first transmission mechanism being connected to another gear element.

[0040] In some embodiments, the gear mechanism includes a planetary gear mechanism. The planetary gear mechanism comprises a sun gear, a ring gear, a planet gear set, and a planet carrier.

[0041] The sun gear is located inside the ring gear. The planetary gear set is positioned between an inner ring of the ring gear and an outer ring of the sun gear, and the planetary gear set meshes with both the ring gear and the sun gear.

[0042] The planet carrier is connected to a central section of the planet gears of the planetary gear set. When the planet gears rotate, the planet carrier is set into rotation.

[0043] In some embodiments, the planetary gear set comprises several groups of planet gears. One group of planet gears is meshed with the sun gear, and another group of planet gears is meshed with the ring gear.

[0044] In some embodiments, a number of teeth of one group of planet gears is the same as, or different from, a number of teeth of another group of planet gears.

[0045] In some embodiments, the output shaft of the support power device is connected to the sun gear or the planet carrier.

[0046] In some embodiments, the first gear mechanism is connected to the planet carrier or the sun gear.

[0047] In some embodiments, the toothed ring is stationary and does not rotate.

[0048] In some embodiments, one of the sun gear and planet carrier is connected to the output shaft of the support power device, and the other is connected to the first gear mechanism.

[0049] In some embodiments, the support unit further comprises a third gear mechanism. The power input shaft rotates a component of the first gear mechanism via the third gear mechanism.

[0050] In some embodiments, the third transmission mechanism comprises at least one of the following: a mechanical transmission mechanism, a hydraulic transmission mechanism, a magnetic transmission mechanism, a hydrodynamic transmission mechanism, and an electromagnetic transmission mechanism.

[0051] In some embodiments, the mechanical transmission mechanism comprises at least one of the following: a gear transmission mechanism, a wheel transmission mechanism, and a worm gear mechanism.

[0052] In some embodiments, the gear transmission mechanism comprises two gears and a power transmission element. One gear is connected to the power input shaft, another gear is connected to the first transmission mechanism, and the power transmission element is connected to the two gears to cause the two gears to rotate together.

[0053] In some embodiments, the gear wheel comprises at least one of the following: a pulley and a sprocket.

[0054] The power transmission element comprises at least one of the following: a belt and a chain.

[0055] In some embodiments, the support unit further comprises a fourth gear mechanism, and the second gear mechanism rotates a component of the first gear mechanism via the fourth gear mechanism.

[0056] In some embodiments, the fourth transmission mechanism comprises at least one of the following: a mechanical transmission mechanism, a hydraulic transmission mechanism, a magnetic transmission mechanism, a hydrodynamic transmission mechanism, and an electromagnetic transmission mechanism.

[0057] In some embodiments, the mechanical transmission mechanism comprises at least one of the following: a gear transmission mechanism, a wheel transmission mechanism, and a worm gear mechanism.

[0058] In some embodiments, the gear mechanism comprises two gear wheels and a power transmission element, wherein one gear wheel is connected to the second gear mechanism, another gear wheel is connected to the first gear mechanism, and the power transmission element is connected to the two gear wheels to cause the two gear wheels to rotate together.

[0059] In some embodiments, the gear wheel comprises at least one of the following: a pulley and a sprocket.

[0060] The power transmission element comprises at least one of the following: a belt and a chain.

[0061] In some embodiments, the support unit further includes a clutch. The power input shaft rotates a component of the first gear mechanism via the third gear mechanism, and the clutch is configured to disconnect or establish a power transmission connection through which the power input shaft rotates a component of the first gear mechanism via the third gear mechanism.

[0062] In some embodiments, the coupling includes a one-way bearing.

[0063] In some embodiments, the one-way bearing is connected to the power input shaft, and the third gear mechanism is connected to the power input shaft via the one-way bearing.

[0064] In some embodiments, if the rotational speed of the third gear mechanism is greater than the rotational speed of the power input shaft, the one-way bearing disconnects the power transmission connection through which the power input shaft rotates a component of the first gear mechanism via the third gear mechanism.

[0065] In some embodiments, an output shaft of the support power device is a hollow shaft, and the power input shaft is arranged through the output shaft of the support power device.

[0066] In some embodiments, the output shaft of the support power device is able to rotate relative to the power input shaft.

[0067] In some embodiments, a bearing is provided between the output shaft of the support power device and the power input shaft.

[0068] In some embodiments, the support power device and at least some components of the second gear mechanism are arranged along one direction of extension of the power input shaft.

[0069] In some embodiments, at least some components of the second transmission mechanism are pushed onto the power input shaft.

[0070] In some embodiments, the support power device is pushed onto the power input shaft.

[0071] In some embodiments, the output shaft of the support power device and the power input shaft are arranged coaxially.

[0072] In some embodiments, the speed control power device and at least some components of the first transmission mechanism are arranged along one direction of extension of the power output shaft.

[0073] In some embodiments, at least some components of the first transmission mechanism are pushed onto an extension line of the power output shaft.

[0074] In some embodiments, the output shaft of the speed control power device and the power output shaft are arranged coaxially.

[0075] In some embodiments, the rotational speed of the power output shaft increases to the same extent as the rotational speed of the speed control power device and / or the rotational speed of the power input shaft increase.

[0076] In some embodiments, the speed of the speed control power device is controlled based on the speed of the power input shaft.

[0077] In some embodiments, the torque of the power output shaft increases to the same extent as the torque of the support power device and the torque of the power input shaft increase.

[0078] In some embodiments, the torque of the support power device is controlled based on the torque of the power input shaft.

[0079] In some embodiments, the power input shaft and the power output shaft are arranged in a direction perpendicular to the power output shaft at a distance from each other.

[0080] In some embodiments, the direction of extension of the power input shaft runs essentially parallel to the direction of extension of the power output shaft.

[0081] In some embodiments, the support unit further includes a power input device, and the power input device is coaxially connected to the power input shaft.

[0082] In some embodiments, the power input device comprises at least one of the following: an electric motor, an internal combustion engine, and a pedal crank mechanism.

[0083] In some embodiments, the power input device is permanently connected to the power input shaft.

[0084] In some embodiments, the speed control power device comprises at least one of the following: an electric motor and an internal combustion engine.

[0085] In some embodiments, the power assist device comprises at least one of the following: an electric motor and an internal combustion engine.

[0086] In some embodiments, the vehicle to which the support unit is applied is an electrically assisted bicycle, an electric motorcycle, or an electric vehicle.

[0087] In a second aspect, embodiments of the present disclosure provide a vehicle. The vehicle comprises: a power input device; and the support unit according to one of the embodiments mentioned above, wherein the support unit is connected to the power input device and is configured to control power input by the power input device.

[0088] In the aforementioned vehicle, the assistance power device is able to rotate the speed control power device via the differential gear mechanism, thereby compensating for insufficient output power from the speed control power device and improving or eliminating the problem of a soft pedal feel.

[0089] Further aspects and advantages of the embodiments of the present disclosure are partly set forth in the following description and partly become apparent from the following description or can be ascertained through the practice of the embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0090] The above-mentioned and / or further aspects and advantages of the present disclosure will become apparent from the following description of embodiments in conjunction with the accompanying drawings and are easier to understand with their help, wherein: Fig. 1 a schematic module diagram of a support unit according to embodiments of the present disclosure; Fig. 2 a structural diagram of a support unit according to embodiments of the present disclosure; Fig.3 a schematic exploded view of a support unit according to embodiments of the present disclosure; Fig. 4 a structural diagram of a support unit according to embodiments of the present disclosure; Fig. 5 is a further schematic exploded view of a support unit according to embodiments of the present disclosure; Fig. 6 a schematic sectional view of a support unit according to embodiments of the present disclosure; Fig. 7 is a schematic module diagram of a vehicle according to embodiments of the present disclosure.

[0091] Explanation of the reference numbers of the main elements: Support unit 100, power output shaft 12, power input shaft 14, speed control power device 16, support power device 18, first gear mechanism 20, second gear mechanism 22, differential gear mechanism 24, switching device 28, one-way bearing 30, gear wheel 32, power transmission element 34, first sun gear 36, first ring gear 38, first planetary gear set 40, first planet carrier 42, third gear mechanism 44, fourth gear mechanism 46, second sun gear 48, second ring gear 50, second planetary gear set 52, second planet carrier 54, clutch 56, vehicle 10, power input device 200, propulsion device 300. DETAILED DESCRIPTION OF THE EXECUTION FORMS

[0092] Embodiments of the present disclosure are described in detail below. Examples of the embodiments are illustrated in the accompanying drawings, where identical or similar reference numerals denote identical or similar elements or elements with identical or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and serve only to illustrate the present disclosure and should not be understood as limiting it.

[0093] It is understood that in the description of this disclosure, the terms "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", and the like, which indicate orientations or positional relationships, are based on the orientations or positional relationships shown in the drawings and serve only to clarify and simplify the description of this disclosure. They do not state or imply that the device or element in question must have a specific orientation or must be constructed and operated in a specific orientation. Therefore, these terms must not be understood in a way that restricts the scope of this disclosure.Furthermore, the terms “first” and “second” are used for descriptive purposes only and should not be understood as indicating or implying a relative meaning or as implying the number of the designated technical features. Thus, a feature defined as “first” or “second” may explicitly or implicitly include one or more of the features. In the description of this disclosure, “several” means two or more unless expressly defined otherwise.

[0094] In the description of this disclosure, it should be noted that the terms "assemble," "connect," and "couple" are to be understood in the broadest sense unless expressly stated and defined otherwise. For example, the connection may be a permanent connection, a detachable connection, or an integral connection. The connection may be a mechanical connection or an electrical connection. The connection may be a direct connection or an indirect connection via an intermediate medium. The connection may be internal communication between two elements or an interacting relationship between two elements. For the person skilled in the art, the specific meanings of the above-mentioned terms in this disclosure may be interpreted according to the specific circumstances.

[0095] In the present disclosure, unless expressly stated and defined otherwise, the phrase "a first structural element is located 'on' or 'under' a second structural element" can include the first and second structural elements being in direct contact, and it can also include the first and second structural elements not being in direct contact, but being in contact via another, intervening structural element. Furthermore, the phrase "the first structural element is located 'above,' 'over,' or 'on' the second structural element" can include the first structural element being located directly above or obliquely above the second structural element, or simply state that the horizontal height of the first structural element is greater than that of the second structural element.The phrase that the first structural element is located “below” or “under” the second structural element implies that the first structural element is located directly below or diagonally below the second structural element, or simply states that the horizontal height of the first structural element is lower than that of the second structural element.

[0096] The above disclosure provides many different embodiments or examples for implementing various structures of the present disclosure. To simplify the disclosure of the present disclosure, descriptions of components and arrangements of specific examples have been presented above. Of course, these are merely examples and are not intended to limit the present disclosure. Furthermore, the present disclosure may repeat reference numbers and / or reference letters in different examples, and such repetition serves only the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, the present disclosure gives examples of various specific processes and materials. However, the person skilled in the art will also recognize the possibility of using other processes and / or other materials.

[0097] In a first aspect, with reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. 6. Embodiments of the present disclosure provide a support unit 100. The support unit 100 comprises a power output shaft 12, a power input shaft 14, a speed control power device 16, and a support power device 18.

[0098] The power output shaft 12 is configured to deliver power. The power input shaft 14 is configured to receive input power from the power input device 200 and transmit the power to the power output shaft 12. The speed control power device 16 is connected to the power output shaft 12 via the first gear mechanism 20 and is configured to control the speed of the power output shaft 12. The auxiliary power device 18 is connected to the first gear mechanism 20 via the second gear mechanism 22 and is configured to provide auxiliary power to the power output shaft 12.

[0099] The support power device 18 is connected to the speed control power device 16 via the differential gear mechanism 24. If information about the power to be delivered by the speed control power device 16 exceeds a preset threshold, the support power device 18 is able to rotate the speed control power device 16 via the differential gear mechanism 24.

[0100] In the support unit 100 mentioned above, the support power device 18 is able to rotate the speed control power device 16 via the compensating gear mechanism 24, thereby compensating for insufficient output power of the speed control power device 16 and improving or eliminating the problem of a soft pedal feel.

[0101] Furthermore, the support power device 18 transmits torque via the compensating gear mechanism 24 to the speed control power device 16, and the speed control power device 16 can be further miniaturized, making the support unit 100 more compact and lighter.

[0102] More precisely, the support unit 100 can be responsible for providing additional power support. The power output shaft 12 is configured to deliver power, and the power output shaft 12 can be connected to a wheel so that the power drives the wheel to rotate, thereby propelling the vehicle forward.

[0103] The power input shaft 14 is configured to receive input power from the power input device 200. In some embodiments, the power input device 200 may comprise at least one of the following: an electric motor, an internal combustion engine, and a pedal crank mechanism. In some embodiments, the vehicle may be an electric vehicle, and the electric vehicle may be a pure electric vehicle, a hybrid vehicle, an extended-range electric vehicle, or the like. The electric vehicle has an electric motor, and an output shaft of the electric motor may be connected to the power input shaft 14. When the electric motor is operating, the output shaft can rotate the power input shaft 14 so that the power input shaft 14 receives input power from the electric motor and transmits the power to the power output shaft 12, thereby propelling the vehicle.

[0104] In some embodiments, the vehicle can be a fuel-powered vehicle, and the fuel-powered vehicle can be a purely fuel-powered vehicle, a hybrid vehicle, or the like. The fuel-powered vehicle has an internal combustion engine, and an output shaft of the internal combustion engine can be connected to the power input shaft 14. When the internal combustion engine is operating, the output shaft can rotate the power input shaft 14, so that the power input shaft 14 receives input power from the internal combustion engine and transmits the power to the power output shaft 12, thereby propelling the vehicle.

[0105] In some embodiments, the vehicle can be an electrically assisted bicycle. The electrically assisted bicycle has a pedal-crank mechanism, and the pedal-crank mechanism can include a crankshaft and a pedal. The pedal is connected to the power input shaft 14 via the crankshaft. When a rider presses down on the pedal, the crankshaft can be set in rotation, which in turn sets the power input shaft 14 in rotation, so that the power input shaft 14 receives input power from the pedal-crank mechanism and transmits the power to the power output shaft 12, thereby propelling the vehicle.

[0106] The speed control power device 16 is connected to the power output shaft 12 via the first gear mechanism 20 and is configured to control the speed of the power output shaft 12. More precisely, when operating, the speed control power device 16 can set the first gear mechanism 20 in motion, thereby causing the power output shaft 12 to rotate in order to control its speed. The gear ratio of the first gear mechanism 20 can be fixed or variable. In some embodiments, the speed control power device 16 can include a speed control motor, and the speed of the speed control motor is adjustable to control the speed of the power output shaft 12. The speed control power device 16 can change the speed of the power output shaft 12 via the first gear mechanism 20.

[0107] The auxiliary power device 18 is connected to the first gear mechanism 20 via the second gear mechanism 22 and is configured to provide auxiliary power to the power output shaft 12. Thus, the auxiliary power device 18 and the power input device 200 can jointly deliver power to provide greater power to the power output shaft 12, or reduce the output load of the power input device 200 while providing unchanged power to the power output shaft 12. In some embodiments, the auxiliary power device 18 may include an auxiliary motor, and the speed of the auxiliary motor is adjustable to adapt to different power requirements.The auxiliary motor can be used to compensate for insufficient power from the power input shaft 14, so that the power input device 200 (such as human muscle power) remains within an acceptable torque output state. In some embodiments, the auxiliary power device 18 can effect a speed reduction via the second gear mechanism 22.

[0108] The support power device 18 is connected to the speed control power device 16 via the differential gear mechanism 24. If information about the power to be delivered by the speed control power device 16 exceeds a preset threshold, the support power device 18 is able to rotate the speed control power device 16 via the differential gear mechanism 24. More precisely, the differential gear mechanism 24 can transfer power from the support power device 18 to the speed control power device 16, so that if the information about the power to be delivered by the speed control power device 16 exceeds the preset threshold, the speed control power device 16 is set in motion to compensate for insufficient power output from the speed control power device 16.Thus, the problem of weak pedal feel, caused by insufficient power output from the speed control power device 16, can be mitigated to some extent. Furthermore, the speed control power device 16 does not need to be larger, and a structurally compact support unit 100 can be achieved, which is advantageous for the miniaturized design of the support unit 100.

[0109] In the prior art, when a rider pedals an electrically assisted bicycle with considerable force, the speed control motor requires a very high torque. If, at this point, the output power of the speed control motor is saturated and cannot deliver any further torque, there is a possibility that layered structures within the mechanical structure will become less flexible, resulting in a soft pedal feel. In the embodiments described in the present disclosure, the assistance power device 18 is able to rotate the speed control power device 16 via the compensating gear mechanism 24, thereby compensating for insufficient output power from the speed control power device 16 and improving or eliminating the problem of a soft pedal feel.

[0110] Optionally, in some embodiments, the preset threshold may include, among other things, a threshold of the speed control power device 16 under a rated power operating condition, a threshold preset by a manufacturer of the support unit 100, a threshold set by a user, or the like.

[0111] In some embodiments, the associated information about power to be delivered by the speed control power device 16 includes at least one of the following: an amount of torque to be delivered by the speed control power device 16, an amount of power to be delivered by the speed control power device 16, and an amount of energy to be supplied by the speed control power device 16.

[0112] Thus, the speed control power device 16 can adapt to several application scenarios.

[0113] More precisely, in some embodiments, the associated information about a power to be delivered by the speed control power device 16 includes an amount of torque to be delivered by the speed control power device 16, an amount of power to be delivered by the speed control power device 16, or an amount of energy to be supplied by the speed control power device 16.

[0114] For example, if the amount of torque to be delivered by the speed control power device 16 exceeds a preset torque threshold, the support power device 18 is able to set the speed control power device 16 in rotation via the differential gear mechanism 24. Similarly, if the amount of power to be delivered by the speed control power device 16 exceeds a preset power threshold, the support power device 18 is able to set the speed control power device 16 in rotation via the differential gear mechanism 24.If the amount of energy to be supplied by the speed control power device 16 exceeds a preset energy supply threshold, the support power device 18 is able to set the speed control power device 16 in rotation via the compensating gear mechanism 24.

[0115] In some embodiments, the associated information about power to be delivered by the speed control power device 16 includes any one or any two of the following: an amount of torque to be delivered by the speed control power device 16, an amount of power to be delivered by the speed control power device 16, and an amount of energy to be supplied by the speed control power device 16.

[0116] In some embodiments, the amount of energy to be supplied by the speed control power device 16 includes an amount of current to be supplied by the speed control power device 16.

[0117] Therefore, if the amount of current exceeds a preset current threshold, the support power device 18 is able to set the speed control power device 16 into rotation via the compensating gear mechanism 24.

[0118] More precisely, the supplied current can be determined according to a torque that must be delivered by the speed control power device 16. If the supplied current exceeds the preset current threshold, this indicates that the speed control power device 16 cannot deliver the required torque. Therefore, the assist power device 18 is able to rotate the speed control power device 16 via the compensating gear mechanism 24 to compensate for the speed control power device 16's inability to deliver a higher torque due to a saturated output power, thereby improving the problem of a soft pedal feel.

[0119] Furthermore, the support power device 18 transmits torque via the compensating gear mechanism 24 to the speed control power device 16, and the speed control power device 16 can be further miniaturized, making the support unit 100 more compact and lighter.

[0120] In some embodiments, the associated information about the power output to be delivered by the speed control power device 16, which exceeds a preset threshold, includes at least one of the following pieces of information:

[0121] The torque to be delivered by the speed control power device 16 is greater than a preset torque threshold;

[0122] The power to be delivered by the speed control power device 16 is greater than a preset power threshold;

[0123] The current to be supplied by the speed control power device 16 is greater than a preset current threshold.

[0124] Thus, specific conditions can be determined under which the support power device 18 sets the speed control power device 16 in rotation via the differential gear mechanism 24.

[0125] More precisely, in some embodiments, the associated information about power to be delivered by the speed control power device 16 that exceeds the preset threshold includes: the torque to be delivered by the speed control power device 16 is greater than the preset torque threshold; the power to be delivered by the speed control power device 16 is greater than the preset power threshold; and the current to be supplied by the speed control power device 16 is greater than the preset current threshold.

[0126] The preset torque threshold, preset power threshold, and preset current threshold can be preset and stored in the support unit 100 or in the vehicle and can be specifically determined by means including, but not limited to, simulation, testing, empirical data, or the like. The torque to be delivered can be a torque determined according to a torque that must be delivered by the speed control power device 16. The power to be delivered can be a power determined according to a torque that must be delivered by the speed control power device 16. The current to be supplied can be a current determined according to a torque that must be delivered by the speed control power device 16.

[0127] If, during the operation of the support unit 100, one of the following occurs: the torque to be delivered by the speed control power device 16 is greater than the preset torque threshold, the power to be delivered by the speed control power device 16 is greater than the preset power threshold, or the current to be supplied by the speed control power device 16 is greater than the preset current threshold, then the support power device 18 is able to rotate the speed control power device 16 via the differential gear mechanism 24, so that the support unit 100 can provide the torque requirement of the power input shaft 14, thereby improving the problem of the soft pedal feel.

[0128] Furthermore, the support power device 18 transmits torque via the compensating gear mechanism 24 to the speed control power device 16, and the speed control power device 16 can be further miniaturized, making the support unit 100 more compact and lighter.

[0129] In some embodiments, the associated information about power to be delivered by the speed control power device 16 that exceeds the preset threshold includes any one or any two of the following: the torque to be delivered by the speed control power device 16 is greater than the preset torque threshold; the power to be delivered by the speed control power device 16 is greater than the preset power threshold; the current to be supplied by the speed control power device 16 is greater than the preset current threshold.

[0130] The preset torque threshold, preset power threshold, and preset current threshold can be specifically determined according to requirements, power, and other factors, and the present disclosure does not impose any restrictions in this regard.

[0131] In some embodiments, an operating mode of the support unit 100 includes a gear-shifting mode and / or a fixed-gear mode. When the support power device 18 rotates the speed control power device 16 via the differential gear mechanism 24, the support unit 100 is in the fixed-gear mode. When the power transmission linkage by which the support power device 18 rotates the speed control power device 16 via the differential gear mechanism 24 is disengaged, the support unit 100 is in the gear-shifting mode.

[0132] This eliminates the soft pedal feel and the jerky sensation caused by sudden gear changes during a mode switch.

[0133] Furthermore, the support power device 18 transmits torque via the compensating gear mechanism 24 to the speed control power device 16, and the speed control power device 16 can be further miniaturized, making the support unit 100 more compact and lighter.

[0134] More precisely, in some embodiments, the speed control power device 16 may include a speed control motor, and the support power device 18 may include a support motor. The maximum torque requirements of the speed control motor and the support motor occur at different times.

[0135] In some embodiments, the fixed-gear mode can be a mode in which the gear ratio of the support unit 100 is fixed, for example, a mode in which a speed ratio from input to output is fixed. Optionally, in the fixed-gear mode, the torque of the speed control motor is the rated torque or maximum torque. The torque is related to the speed of the speed control motor. That is, in the fixed-gear mode, the speed of the speed control motor is fixed and unchanged. If the torque to be delivered by the speed control motor exceeds the preset torque threshold, for example, if the power output of the speed control motor is insufficient, this indicates that the speed control motor cannot meet the torque requirement of the power output shaft 12.The support power device 18 is able to rotate the speed control motor via the differential gear mechanism 24, so that the torque of the support motor can be transmitted to the speed control motor via the differential gear mechanism 24, thereby eliminating to some extent the soft pedaling feel caused by sudden gear changes during a mode change.

[0136] In some embodiments, the gear shift mode can be a mode in which the gear ratio of the support unit 100 is variable, for example, a mode in which the speed ratio from input to output is variable. Optionally, in the gear shift mode, the torque of the speed control motor can change continuously. The torque is related to the speed of the speed control motor. That is, in the gear shift mode, the speed of the speed control motor can change continuously to achieve stepless variable power transmission, thereby eliminating to some extent the jerking sensation caused by sudden gear changes during a mode switch.When the power transmission connection, through which the support power device 18 sets the speed control motor in rotation via the differential gear mechanism 24, is disconnected, the support unit 100 can be in gear shift mode, and the speed of the speed control motor can adapt to the torque requirement of the power output shaft 12 without the support power device 18 having to set the speed control motor in rotation via the differential gear mechanism 24.

[0137] The support unit 100 of embodiments of the present disclosure is integrated with a speed-variable function to form an ECVT (Electronically Controlled Continuously Variable Transmission), thereby eliminating the jerking sensation caused by step-by-step shifting. Simultaneously, a derailleur and a multi-stage flywheel can be omitted, thus reducing weight and cost and increasing compactness. Furthermore, the support power device 18 can transmit torque to the speed-control power device 16 via the differential gear mechanism 24, allowing the speed-control power device 16 to be further miniaturized, making the support unit 100 more compact and lighter.

[0138] In some embodiments, the support unit 100 switches from fixed gear mode to gear shift mode in response to the support unit 100 fulfilling a preset condition.

[0139] Thus, the support unit 100 can be switched from fixed gear mode to gear shift mode.

[0140] More precisely, in the illustrated embodiments, the support unit 100 is in fixed-gear mode when the support power device 18 rotates the speed control power device 16 via the differential gear mechanism 24. In fixed-gear mode, the support power device 18 can rotate the speed control power device 16 via the differential gear mechanism 24 to compensate for insufficient power output from the speed control power device 16.

[0141] In response to the support unit 100 fulfilling the preset condition, the power transmission link, through which the support power device 18 rotates the speed control power device 16 via the differential gear mechanism 24, is interrupted, causing the support unit 100 to switch from fixed gear mode to gear shift mode. Thus, in gear shift mode, the torque of the speed control power device 16 can continuously change to adapt to the torque requirements of the support unit 100.

[0142] In some embodiments, “in response to the support unit 100 meeting the preset condition” includes: in response to an operating state of the speed control power device meeting a preset condition.

[0143] Therefore, if the operating state of the speed control power device 16 meets the preset condition, the support unit 100 can switch from the fixed gear mode to the gear shift mode.

[0144] More precisely, in some embodiments, if an associated information about the power to be delivered by the speed control power device 16 exceeds the preset threshold, for example, if the power output of the speed control power device 16 is insufficient, the operating mode of the support unit 100 is the fixed gear mode, and the support power device 18 is able to set the speed control power device 16 in rotation via the differential gear mechanism 24.

[0145] If the associated information regarding the power output of the speed control power device 16 does not exceed the preset threshold, it can be determined that the operating state of the speed control power device 16 meets the preset condition. In response to the fact that the operating state of the speed control power device 16 meets the preset condition, the support unit 100 switches from fixed-gear mode to gear-shift mode.

[0146] In some embodiments, “in response to the fact that the operating state of the speed control power device 16 satisfies the preset condition” includes at least one of the following: in response to the fact that a torque output of the speed control power device 16 is less than or equal to a preset torque value; in response to the fact that the speed of the speed control power device 16 is greater than or equal to a preset speed value.

[0147] Thus, the operating state of the speed control power device 16 can be determined according to the torque output and the speed of the speed control power device 16, thereby enabling switching between the fixed gear mode and the gear shift mode of the support unit 100.

[0148] More precisely, in some embodiments the speed control power device 16 comprises a speed control motor, wherein the torque output of the speed control power device 16 can be the torque output of the speed control motor and the speed of the speed control power device 16 can be the speed of the speed control motor.

[0149] In some embodiments, “in response to the operating state of the speed control power device 16 satisfying the preset condition” includes: in response to a torque output of the speed control power device 16 being less than or equal to a preset torque value; in response to the rotational speed of the speed control power device 16 being greater than or equal to a preset rotational speed value. If the operating state of the speed control power device 16 satisfies one or the other of the two conditions mentioned above, it can be determined that the operating state of the speed control power device 16 satisfies the preset condition. In response to the operating state of the speed control power device 16 satisfying the preset condition, the support unit 100 switches from fixed-gear mode to gear-shift mode.

[0150] In some embodiments, “in response to the fact that the operating state of the speed control power device 16 satisfies the preset condition” includes: in response to the fact that a torque output of the speed control power device 16 is less than or equal to a preset torque value, or in response to the fact that the speed of the speed control power device 16 is greater than or equal to a preset speed value.

[0151] The preset torque value and the preset speed value can be specifically adjusted as required, and the present disclosure does not impose any restrictions in this regard.

[0152] In some embodiments, the support unit 100 further comprises a switching device 28. The switching device 28 is configured to establish or disconnect the power transmission connection by which the support power device 18 rotates the speed control power device 16 via the differential gear mechanism 24.

[0153] Thus, the power transmission between the support power device 18 and the speed control power device 16 can be separated and established via the switching device 28.

[0154] More precisely, in the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig.As shown in Figure 6, the speed control power device 16 is connected to the differential gear mechanism 24 via the switching device 28. In some embodiments, the support power device 18 can be connected to the differential gear mechanism 24 via the switching device 28.

[0155] If the associated information regarding the power output to be delivered by the speed control power device 16 exceeds the preset threshold, the switching device 28 can establish the power transmission connection through which the support power device 18 rotates the speed control power device 16 via the differential gear mechanism 24, and the support unit 100 can be in fixed gear mode. The support power device 18 can rotate the speed control power device 16 via the differential gear mechanism 24, thereby eliminating the soft pedal feel to a certain extent.

[0156] If the associated information regarding the power output to be delivered by the speed control power device 16 does not exceed the preset threshold, the switching device 28 can disconnect the power transmission connection through which the support power device 18 rotates the speed control power device 16 via the differential gear mechanism 24, and the support unit 100 can be in gear-shift mode. The support power device 18 cannot rotate the speed control power device 16 via the differential gear mechanism 24.

[0157] In some embodiments, the switching device 28 includes a clutch. In response to the support unit 100 fulfilling the preset condition, the clutch automatically disconnects the power transmission link through which the support power device 18 sets the speed control power device 16 into rotation 24 via the differential gear mechanism.

[0158] Thus, the structure of the switching device 28 is simple, and the costs are low.

[0159] More precisely, in some embodiments the coupling can have a first part and a second part. In the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig.As shown in Figure 6, the differential gear mechanism 24 is connected to the speed control power device 16 via the switching device 28, wherein the first part can be connected to the speed control power device 16 and the second part can be connected to the differential gear mechanism 24. In some embodiments, the differential gear mechanism 24 is connected to the support power device 18 via the switching device 28, wherein the first part can be connected to the support power device 18 and the second part can be connected to the differential gear mechanism 24.

[0160] The first part can engage with and disengage from the second part. When the first part is engaged with the second part, the switching device 28 can establish the power transmission connection through which the support power device 18 rotates the speed control power device 16 via the differential gear mechanism 24. When the first part disengages from the second part, the switching device 28 can disconnect the power transmission connection through which the support power device 18 rotates the speed control power device 16 via the differential gear mechanism 24.

[0161] The coupling technology is mature, and the structure is simple, which can effectively reduce the cost of the switching device 28.

[0162] In some embodiments - with reference to Fig. 3, Fig. 5 and Fig.6 - the coupling includes a one-way bearing 30.

[0163] Thus, the power transmission connection via the one-way bearing 30 can be disconnected and reconnected. When the assist power device 18 transmits torque to the speed control power device 16 via the differential gear mechanism 24, the gear ratio of the assist unit 100 is fixed, and the system operates in fixed-gear mode. When the vehicle speed needs to be increased, the speed control power device 16 accelerates, the one-way bearing 30 disengages, and the system enters ECVT mode and begins changing speed. During the switch between the two modes, the torque of the speed control power device 16 changes continuously, and the gears change smoothly, thus avoiding a spongy pedal feel and any jerking.

[0164] More precisely, the one-way bearing 30 allows a shaft to rotate freely in one direction, while locking it or generating high resistance in the other direction.

[0165] In the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. As shown in Figure 6, the differential gear mechanism 24 is connected to the speed control power device 16 via the switching device 28. The speed control power device 16 comprises a speed control motor, and the differential gear mechanism 24 can be connected to an output shaft of the speed control motor via the one-way bearing 30.

[0166] When the speed control power device 16 operates at a low speed, the support power device 18 is able to rotate the speed control power device 16. As the speed of the speed control motor increases, the one-way bearing 30 disengages the power transmission connection through which the support power device 18 rotates the speed control power device 16 via the differential gear mechanism 24, so that the speed of the speed control power device 16 exceeds the speed of the support power device 18.

[0167] Under operating conditions requiring high pedaling torque and a large torque output, which typically occurs when the speed control power device 16 operates at a low speed, such as during a start-up phase, the assistance power device 18 can deliver torque to the speed control power device 16 in one direction only via the one-way bearing 30, but not in the reverse direction. In some embodiments, the assistance power device 18 itself does not require compensation with a reverse torque from the speed control power device 16 because the size and parameters of the assistance power device 18 are sufficient to meet the assistance requirement.

[0168] In some embodiments, the one-way bearing 30 is connected to the output shaft of the speed control power device 16, and the differential gear mechanism 24 is connected to the speed control power device 16 via the one-way bearing 30. More precisely, the one-way bearing 30 comprises an inner ring structure and an outer ring structure that interacts with the inner ring structure. The differential gear mechanism 24 is rigidly connected to one of the inner ring structures and the other to the outer ring structure, and the output shaft of the speed control power device 16 is rigidly connected to the other of the inner ring structures and the outer ring structure. When the output shaft of the speed control power device 16 is connected to the inner ring structure of the one-way bearing 30, the output shaft of the speed control power device 16 can pass through the inner ring structure of the one-way bearing 30.

[0169] Therefore, the installation of the 30-piece disposable storage system is simple, and efficiency is high.

[0170] More precisely, in some embodiments, the speed control power device 16 may include a speed control motor. The speed control motor includes an output shaft, which may be a rotating shaft for power output from the speed control motor. A rotor of the speed control motor is connected to the output shaft. The one-way bearing 30 is connected to the output shaft of the speed control motor, and the differential gear mechanism 24 is connected to the speed control motor via the one-way bearing 30. The one-way bearing 30 is capable of disengaging and re-establishing the power transmission connection through which the support power device 18 rotates the speed control motor via the differential gear mechanism 24.

[0171] In some embodiments, the translation ratio between power input and power output of the support unit 100 is a constant value when the support unit 100 is in fixed gear mode.

[0172] Thus, in fixed-gear mode, the support unit 100 can ensure that power is transferred from input to output at a constant value.

[0173] More precisely, the magnitude of the gear ratio in fixed-gear mode can be determined according to the application scenarios, power requirements, and other factors of the support unit 100. Once the magnitude of the gear ratio has been determined, the parameters and structures of the transmission components of the support unit 100 can be dimensioned in the power transmission process such that, in fixed-gear mode, the gear ratio between the input power and the output power of the support unit 100 is the dimensioned constant value.

[0174] In some embodiments, the transmission ratio between power input and power output of the support unit 100 changes to the extent that the rotational speed of the speed control power device 16 changes when the support unit is in gear shift mode.

[0175] Thus, in the gear shift mode, the gear ratio of the support unit 100 can be changed by changing the speed of the speed control power device 16, thereby implementing a gear shift operation of the support unit 100.

[0176] More precisely, in gearshift mode, mapping relationships between different speeds of the speed control power device 16 and gear ratios of the support unit 100 can be pre-calibrated and stored through simulation, testing, or other methods. Each mapping relationship can correspond to a gear of the support unit 100 in gearshift mode. The support unit 100 can regulate the speed of the speed control power device 16 according to a gear required by the vehicle to obtain a corresponding gear ratio and transmit power in the appropriate gear, thus effectively eliminating any jerking sensation during gear changes.

[0177] In some embodiments, the gear of the support unit 100 increases to the extent that the speed of the speed control power device 16 increases when the support unit 100 is in gear shift mode.

[0178] This can improve the user experience.

[0179] More precisely, in gear shift mode, the gear of the support unit 100 increases in proportion to the increase in the rotational speed of the speed control power device 16; that is, the gear of the support unit 100 is positively correlated with the rotational speed of the speed control power device 16. If a user expects a high gear, the support unit 100 increases the rotational speed of the speed control power device 16 according to the above relationship to obtain the desired high gear. If the user expects a low gear, the support unit 100 decreases the rotational speed of the speed control power device 16 according to the above relationship to obtain the desired low gear. Thus, the support unit 100 can implement appropriate control according to user expectations and thereby improve the user experience.

[0180] Mapping relationships between different speeds of the speed control power device 16 and gear ratios of the support unit 100 can be calibrated and stored by simulation, testing, or other methods. Each mapping relationship can correspond to a gear of the support unit 100 in gear shift mode. Thus, the support unit 100 can receive a target speed from the speed control power device 16 according to a required gear and the mapping relationship, and control the speed control power device 16 to operate at the target speed.

[0181] In some embodiments, the compensating gear mechanism 24 comprises at least one of the following: a mechanical gear mechanism, a hydraulic gear mechanism, a magnetic gear mechanism, a hydrodynamic gear mechanism, and an electromagnetic gear mechanism.

[0182] Thus, the structure of the differential gear mechanism 24 can be flexibly configured.

[0183] More precisely, in some embodiments, the differential gear mechanism 24 comprises a mechanical gear mechanism, a hydraulic gear mechanism, a magnetic gear mechanism, a hydrodynamic gear mechanism, or an electromagnetic gear mechanism. In some embodiments, the differential gear mechanism 24 comprises any one, any two, any three, or any four of the following: a mechanical gear mechanism, a hydraulic gear mechanism, a magnetic gear mechanism, a hydrodynamic gear mechanism, and an electromagnetic gear mechanism.

[0184] The mechanical transmission mechanism can transmit power using methods that include, for example, friction, gearing, linkages, pawls, crank mechanisms, eccentric gears, or similar components. The mechanical transmission mechanism generally consists of relatively few components and has a simple structure, which makes manufacturing and maintenance relatively easy. Under good lubrication and sealing conditions, the power transmission efficiency of the mechanical transmission mechanism is relatively high. The mechanical transmission mechanism is suitable for power transmission requirements of various speeds and torques and meets the requirements of the application scenarios of the Support Unit 100.

[0185] The hydraulic transmission mechanism can use fluid as a working medium for power transmission. More precisely, the hydraulic transmission mechanism uses fluid as its working medium. A hydraulic pump converts the power of the support power device 18 into the pressure energy of the fluid, and then the pressure energy of the fluid is converted into mechanical energy via pipes, hydraulic control devices, and actuating devices such as hydraulic cylinders or hydraulic motors, and delivered to the speed control power device 16, thereby setting the speed control power device 16 into rotation.

[0186] The magnetic transmission mechanism can achieve contactless power transmission using the principle of magnetic field interaction. More precisely, the magnetic transmission mechanism utilizes the principle of magnetic field interaction between magnets and transmits torque via a coupling field formed by magnetic field lines. When a drive magnet (also called a driving magnet) rotates, a magnetic field generated by the drive magnet acts on a driven magnet (also called a driven element), causing the driven magnet to rotate and thus transmitting power. Because the magnetic power transmission is contactless, the friction and wear problems of conventional mechanical power transmissions are avoided.

[0187] The hydrodynamic transmission mechanism can be a power transmission method based on the principles of fluid mechanics, where power and torque are transmitted using a fluid medium. More precisely, the hydrodynamic transmission mechanism uses fluid as a working medium and is a device that achieves energy transmission through the kinetic energy of the fluid. When the assisting power device 18 sets an input shaft of a hydrodynamic transmission device in rotation, a fluid in a working chamber interacts with impellers mounted on the input shaft, an output shaft, and a housing to convert the rotational speed and torque input by the assisting power device 18 and then deliver them via the output shaft, thereby setting the speed control power device 16 in rotation.

[0188] The electromagnetic transmission mechanism is a mechanism driven by the conversion of electromagnetic energy into mechanical energy through electromagnetic force. More precisely, the electromagnetic transmission mechanism typically includes an electromagnet section, and its operating principle is based on electromagnetic induction and magnetic field interaction. When an energized coil generates a magnetic field, this field attracts or repels ferromagnetic materials (such as an iron core or an armature), thereby producing mechanical motion. The current in the energized coil can be determined according to the power supplied by the power supply device 18, thus converting the power of the power supply device 18 into a current.The energized coil can convert the current into a magnetic field quantity, so that the ferromagnetic substances generate a corresponding movement and set the speed control power device 16 into rotation.

[0189] In some embodiments, the mechanical transmission mechanism comprises at least one of the following: a gear transmission mechanism, a wheel transmission mechanism, and a worm gear mechanism.

[0190] In this way, the mechanical transmission mechanism has a simple structure and is associated with relatively low costs.

[0191] More precisely, in some embodiments, the mechanical transmission mechanism comprises a gear transmission mechanism, a wheel transmission mechanism, or a worm transmission mechanism. In some embodiments, the mechanical transmission mechanism comprises any one or any two of the following: a gear transmission mechanism, a wheel transmission mechanism, and a worm transmission mechanism.

[0192] The gear transmission mechanism transmits power through the meshing of two or more gears. More precisely, the operating principle of the gear transmission mechanism is based on the ratio of the number of teeth and the module of the gears. In some embodiments, the gear transmission mechanism comprises a driving gear and a driven gear, wherein the driving gear may be connected to the support power device 18 and the driven gear may be connected to the speed control power device 16. When the driving gear (also referred to as the primary gear) rotates, its teeth mesh with the teeth of the driven gear (also referred to as a secondary gear), thereby causing the driven gear to rotate.By adjusting the ratio of the number of teeth on the gears, various gear ratios can be obtained, such as a speed-increasing ratio, a speed-decreasing ratio, or a speed-constant ratio. Furthermore, the gear module determines its size and load-bearing capacity, thereby influencing the efficiency and stability of the power transmission.

[0193] Examples of gear transmission mechanisms include spur gears, helical gears, herringbone gears, bevel gears, and the like.

[0194] The gear drive mechanism is a mechanism that transmits power via flexible or elastic elements such as belts or chains. More specifically, the gear drive mechanism can include a pulley drive mechanism. The pulley drive mechanism transmits power via one or more flexible belts (such as rubber or other belts, chains, or the like) that run around pulleys. The pulley drive mechanism can include a driving pulley and a driven pulley. The driving pulley can be connected to the support power device 18, and the driven pulley can be connected to the speed control power device 16.When the driving pulley rotates, it causes the flexible belt to move along a surface of the pulley, thereby setting the driven pulley and the speed control power device 16 into rotation.

[0195] The operating principle of the worm gear mechanism is based on the engagement between the helical shape of a worm and the toothed surfaces of a worm wheel. The worm wheel can be connected to the support power device 18, and the worm can be connected to the speed control power device. As the worm rotates, its helical shape engages with the toothed surfaces of the worm wheel, thus creating a power transmission effect. Due to the helical shape of the worm wheel's toothed surfaces, only the worm wheel can rotate the worm and thereby rotate the speed control power device 16; power transmission in the reverse direction is not possible. Therefore, the worm gear mechanism exhibits the property of one-way power transmission.

[0196] In some embodiments, the gear transmission mechanism comprises two gear wheels 32 and a power transmission element 34, wherein one gear wheel 32 is connected to an output shaft of the speed control power device 16, another gear wheel 32 is connected to an output shaft of the support power device 18, and the power transmission element 34 is connected to the two gear wheels 32 to cause the two gear wheels 32 to rotate together.

[0197] Thus, the support power device 18 can rotate the speed control power device 16 via the compensating gear mechanism 24.

[0198] More precisely, of the two gear wheels 32, one can be a driving gear wheel 32, and the other can be a driven gear wheel 32. The driving gear wheel 32 can be connected to the output shaft of the support power device 18, and the driven gear wheel 32 can be connected to the output shaft of the speed control power device 16. The power transmission element 34 is connected to both the driving gear wheel 32 and the driven gear wheel 32. When the associated information about the power to be delivered by the speed control power device 16 exceeds the preset threshold, the output shaft of the support power device 18 rotates, thereby setting the driving gear wheel 32 into rotation. As the driving gear wheel 32 rotates, it drives the power transmission element 34 to set the driven gear wheel 32 into rotation.When the driven gear wheel 32 rotates, it sets the output shaft of the speed control power device 16 in rotation, which enables the support power device 18 to set the speed control power device 16 in rotation via the compensating gear mechanism 24.

[0199] In some embodiments, the gear wheel 32 comprises at least one of the following: a pulley and a sprocket.

[0200] The power transmission element 34 comprises at least one of the following: a belt and a chain.

[0201] In this way, the gear mechanism has a simple structure and is easy to assemble.

[0202] More precisely, in some embodiments, the gear wheel 32 includes a pulley, and the power transmission element 34 includes a belt, and the belt is connected to the two pulleys to cause the two pulleys to rotate together. In some embodiments, the gear wheel 32 includes a sprocket, and the power transmission element 34 includes a chain, and the chain is connected to the two sprockets to cause the two sprockets to rotate together. In some embodiments, the gear wheel 32 includes both a pulley and a sprocket, and the power transmission element 34 includes both a belt and a chain. The belt is connected to the two pulleys to cause the two pulleys to rotate together, and the chain is connected to the two sprockets to cause the two sprockets to rotate together.

[0203] During assembly, the belt is placed around the outer circumference of the pulley and tensioned, preventing slippage. Alternatively, the chain is placed around the outer circumference of the sprocket and tensioned, preventing slippage and improving assembly efficiency.

[0204] In some embodiments, the first transmission mechanism 20 comprises a gear transmission mechanism. The gear transmission mechanism comprises several gear elements, wherein the output shaft of the speed control power device 16 is connected to one gear element and the power output shaft 12 is connected to another gear element.

[0205] Thus, the support unit 100 can connect the speed control power device 16 and the power output shaft 12 via the gear transmission mechanism, thereby achieving a high efficiency of power transmission and a relatively large torque load capacity.

[0206] More precisely, a gear element can include, among other things, gears, gear rings, and other components that have teeth. The teeth of the two gear elements mesh with each other, so that when one gear element rotates, the other gear element can be set in motion, thereby transmitting power.

[0207] Of the two gear elements, one can be a driving gear element, and the other can be a driven gear element. The driving gear element can be connected to the output shaft of the speed control power device 16, and the driven gear element can be connected to the power output shaft 12. When the speed control power device 16 sets the driving gear element in rotation, the driving gear element sets the driven gear element in rotation, thereby setting the power output shaft 12 in rotation and achieving power transmission.

[0208] In some embodiments, the gear mechanism includes a planetary gear mechanism. The planetary gear mechanism comprises a sun gear, a ring gear, a planet gear set, and a planet carrier. The sun gear is arranged inside the ring gear. The planet gear set is arranged between an inner ring of the ring gear and an outer ring of the sun gear, and the planet gear set meshes with both the ring gear and the sun gear. The planet carrier is connected to a central section of the planet gears of the planet gear set. When the planet gears rotate, the planet carrier is set into rotation.

[0209] Thus, power can be transferred from the speed control power device 16 through the planetary gear mechanism to the power output shaft 12, resulting in a high efficiency of power transmission and a relatively large torque load capacity.

[0210] More precisely, they are - with reference to Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. 6 - For the sake of simplicity, the sun gear, ring gear, planet gear set and planet carrier of the first gear mechanism 20 are referred to as a first sun gear 36, a first ring gear 38, a first planet gear set 40 and a first planet carrier 42, respectively. In some embodiments, the speed control power device 16 comprises a speed control motor. In the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. As shown in Figure 6, the first sun gear 36 is connected to the output shaft of the speed control motor, and the first planet carrier 42 is connected to the power output shaft 12.

[0211] When the speed control motor is operating, it can rotate the first sun gear 36. The first sun gear 36 can rotate the first planetary gear set 40 and the first planet carrier 42, thereby rotating the power output shaft 12, thus enabling power transmission from the speed control motor to the power output shaft 12 and resulting in continuously variable power transmission at the power output shaft 12.

[0212] Since the first sun gear 36 and the first planet gear set 40 are connected by interlocking teeth, efficient power transmission and the transmission of large torques can be achieved.

[0213] The number of planet gears contained in the first planet gear set 40 can be at least one. In the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig.Figure 6 shows that the planet gears contained in the first planet gear set 40 are multiple, for example two, three, three or more or the like.

[0214] In some embodiments, the planetary gear set comprises several groups of planetary gears, one group of planetary gears being toothed with the sun gear and another group of planetary gears being toothed with the ring gear.

[0215] Thus, power transmission can take place via several groups of planetary gears.

[0216] More precisely, in some embodiments, the planetary gear set comprises two groups of planet gears. The two groups of planet gears are meshed with each other, with one group meshing with the first sun gear 36 and the other with the first ring gear 38. The two groups of planet gears can be connected to the first planet carrier 42. When the speed control motor is operating, it can rotate the first sun gear 36. The first sun gear 36 rotates the planetary gear set to which it is meshed. This planetary gear set the other planetary gear set and the first planet carrier 42 in rotation, thereby rotating the power output shaft 12 and transmitting power from the speed control motor to the power output shaft 12.

[0217] In some embodiments, the planetary gear set comprises more than two groups of planet gears, and these groups are meshed in pairs. One planetary gear group is meshed with the first sun gear 36, another planetary gear group is meshed with the first ring gear 38, and further planetary gear groups are meshed with the planetary gear group meshed with the first sun gear 36, or with the planetary gear group meshed with the first ring gear 38, and perform an intermediate power transmission function. The planetary gear group meshed with the first ring gear 38 may be connected to the first planet carrier 42. When the speed control motor is operating, it can rotate the first sun gear 36.The first sun gear 36 sets a planet gear group interlocked with it into rotation, and the planet gear group sets the other planet gear groups and the first planet carrier 42 into rotation, thereby setting the power output shaft 12 into rotation and realizing a power transmission from the speed control motor to the power output shaft 12.

[0218] In some embodiments, a number of teeth of one group of planetary gears is the same as, or different from, a number of teeth of another group of planetary gears.

[0219] Thus, the number of teeth of the planetary gear set can be configured according to different application scenarios.

[0220] More precisely, in some embodiments, if the number of teeth in one group of planetary gears is the same as the number of teeth in another group of planetary gears, a gear ratio of 1:1 can be achieved. This allows the two groups of planetary gears to change only their direction of rotation without changing their speed or torque.

[0221] In some embodiments, if the number of teeth in one group of planetary gears differs from the number of teeth in another group of planetary gears, a gear ratio other than 1:1 can be achieved. More precisely, the gear ratio is the inverse of the number of teeth in the two groups of planetary gears. For example, if the number of teeth on the planetary gears on one power input side is 8 and the number of teeth on the planetary gears on the power output side is 24, then their gear ratio is 3:1. That is, the speed on the power output side is 1 / 3 of the speed on the power input side, and the torque on the power output side is three times the torque on the power input side.Conversely, if the number of teeth on the planetary gears on the power input side is 24 and the number of teeth on the planetary gears on the power output side is 8, then their gear ratio is 1:3. The speed on the power output side is three times the speed on the power input side, and the torque on the power output side is 1 / 3 of the torque on the power input side.

[0222] If it is necessary to reduce the rotational speed, planetary gears with more teeth can be selected as output gears, and planetary gears with fewer teeth can be selected as input gears. If it is necessary to increase the rotational speed, planetary gears with fewer teeth can be selected as output gears, and planetary gears with more teeth can be selected as input gears. In addition to changes in rotational speed, the torque also changes accordingly. During a speed reduction process, the torque increases. During a speed increase process, the torque decreases.

[0223] In some embodiments, the output shaft of the speed control power device 16 is connected to the sun gear or the planet carrier.

[0224] Thus, the power delivered by the speed control power device 16 can be fed into the planetary gear mechanism via the sun gear or the planet carrier.

[0225] More precisely, in some embodiments, the speed control power device 16 includes a speed control motor. In the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. As shown in Figure 6, the output shaft of the speed control motor is connected to the first sun gear 36, so that power delivered by the speed control motor can be fed into the planetary gear mechanism via the first sun gear 36. The first planet carrier 42 can be connected to the power output shaft 12.

[0226] When the speed control motor is operating, the speed control motor can rotate the first sun gear 36, and the first sun gear 36 can rotate the first planet gear set 40 and the first planet carrier 42, thereby rotating the power output shaft 12 and realizing a transmission of power from the speed control motor to the power output shaft 12.

[0227] In some embodiments, the output shaft of the speed control motor is connected to the first planet carrier 42, so that power delivered by the speed control motor can be fed into the planetary gear mechanism via the first planet carrier 42. The first sun gear 36 can be connected to the power output shaft 12.

[0228] When the speed control motor is operating, the speed control motor can rotate the first planet carrier 42, and the first planet carrier 42 can rotate the first planet gear set 40 and the first sun gear 36, thereby rotating the power output shaft 12 and achieving a transmission of power from the speed control motor to the power output shaft 12.

[0229] In some embodiments, the power output shaft 12 is connected to the planet carrier or the sun gear.

[0230] Thus, the power transmitted by the planetary gear mechanism can be transferred to the power output shaft 12 via the planet carrier or the sun gear.

[0231] More precisely, the speed control power device 16 comprises a speed control motor. In the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig.As shown in Figure 6, the power output shaft 12 is connected to the first planet carrier 42, so that power transmitted by the planetary gear mechanism can be output to the power output shaft 12 via the first planet carrier 42. The output shaft of the speed control motor can be connected to the first sun gear 36.

[0232] When the speed control motor is operating, the speed control motor can rotate the first sun gear 36, and the first sun gear 36 can rotate the first planet gear set 40 and the first planet carrier 42, thereby rotating the power output shaft 12 and realizing a transmission of power from the speed control motor to the power output shaft 12.

[0233] In some embodiments, the power output shaft 12 is connected to the first sun gear 36, so that power transmitted by the planetary gear mechanism can be transferred to the power output shaft 12 via the first sun gear 36. The output shaft of the speed control motor can be connected to the first planet carrier 42.

[0234] When the speed control motor is operating, the speed control motor can rotate the first planet carrier 42, and the first planet carrier 42 can rotate the first planet gear set 40 and the first sun gear 36, thereby rotating the power output shaft 12 and achieving a transmission of power from the speed control motor to the power output shaft 12.

[0235] In some embodiments, the gear ring is connected to the power input shaft 14 via the third gear mechanism 44.

[0236] Therefore, when the auxiliary power device 18 is operating, the power input shaft 14 and the auxiliary power device 18 together can rotate the power output shaft 12. When the auxiliary power device 18 is not operating, the power input shaft 14 alone can rotate the power output shaft 12.

[0237] More precisely, the support power device 18 can be connected to the power output shaft 12 via the second gear mechanism 22 and the first gear mechanism 20, and can be connected to the power input shaft 14 via the second gear mechanism 22, the first gear mechanism 20, and the third gear mechanism 44. The first gear 38 is connected to the power input shaft 14 via the third gear mechanism 44. When the power input shaft 14 receives power input from the power input device 200, the power input shaft 14 can transmit power to the first gear 38 via the third gear mechanism 44, thereby causing the first gear 38 to rotate.

[0238] The first ring gear 38 can be connected to the first planet carrier 42 via the first planet gear set 40, and the first planet carrier 42 is connected to the power output shaft 12. Thus, the first ring gear 38 can rotate the power output shaft 12, so that power input through the power input shaft 14 is transmitted to the power output shaft 12 via the third gear mechanism 44 and the first gear mechanism 20.

[0239] In the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig.As shown in Figure 6, the support power device 18 is connected to the first gear ring 38 via the second gear mechanism 22. When the support power device 18 is operating, it can rotate the first gear ring 38 via the second gear mechanism 22. Thus, power input by the power input device 200 and support power provided by the support power device 18 can together rotate the first gear ring 38, thereby jointly rotating the power output shaft 12.

[0240] In some embodiments, one of the first sun gear 36 and the first planet carrier 42 is connected to the output shaft of the speed control power device 16, and the other is connected to the power output shaft 12.

[0241] Thus, the speed control power device 16 can input speed control power into the first gear mechanism 20 via the first sun gear 36 or the first planet carrier 42, and the first gear mechanism 20 can deliver power from the speed control power device 16 to the power output shaft 12 via the planet carrier or the sun gear.

[0242] More precisely, in the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig.Figure 6 shows the speed control power device 16 and a speed control motor. The output shaft of the speed control power device 16 can be connected to a rotor of the speed control motor. The output shaft of the speed control power device 16 is connected to the first sun gear 36, and the first planet carrier 42 is connected to the power output shaft 12. When the speed control motor is operating, it can rotate the first sun gear 36. The first sun gear 36 rotates the first planet gear set 40, which in turn rotates the first planet carrier 42 and the power output shaft 12, thus enabling the speed control power device 16 to regulate the speed of the power output shaft 12.

[0243] In some embodiments, the output shaft of the speed control power device 16 is connected to the first planet carrier 42, and the first sun gear 36 is connected to the power output shaft 12. When the speed control motor is operating, it can rotate the first planet carrier 42. The first planet carrier 42 rotates the first planet gear set 40, which in turn rotates the first sun gear 36 and the power output shaft 12, thus enabling the speed control power device 16 to regulate the speed of the power output shaft 12.

[0244] In some embodiments, the first gear ring 38 is connected to the second gear mechanism 22 via the fourth gear mechanism 46.

[0245] Thus, the support power device 18 can provide power to the first gear ring 38 of the first gear mechanism 20 successively via the second gear mechanism 22 and the fourth gear mechanism 46, thereby providing support power to the power output shaft 12.

[0246] More precisely, in the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig.As shown in Figure 6, the first planet carrier 42 is connected to the power output shaft 12. The auxiliary power device 18 includes an auxiliary motor. When the auxiliary motor is operating, it can set the second gear mechanism 22 in motion, which in turn rotates components of the fourth gear mechanism 46 and the first ring gear 38. As the first ring gear 38 rotates, it can rotate the first planet gear set 40, which in turn rotates the first planet carrier 42 and the power output shaft 12, thus enabling the auxiliary power device 18 to provide auxiliary power to the power output shaft 12.

[0247] In some embodiments, the second transmission mechanism 22 comprises a gear transmission mechanism. The gear transmission mechanism comprises several gear elements. The output shaft of the support power device 18 is connected to one gear element, and the first transmission mechanism 20 is connected to another gear element.

[0248] Thus, the support unit 100 can connect the support power device 18 and the first gear mechanism 20 via the gear mechanism, thereby achieving a high efficiency of power transmission and a relatively large torque load capacity.

[0249] More precisely, a gear element can include, among other things, a gear, a gear ring, or other components that have teeth. The teeth of the two gear elements mesh with each other, so that when one gear element rotates, the other gear element can be set in motion, thereby transmitting power.

[0250] Of the two gear elements, one can be a driving gear element, and the other can be a driven gear element. The driving gear element can be connected to the output shaft of the support power device 18, and the driven gear element can be connected to the first gear mechanism 20. When the support power device 18 sets the driving gear element in rotation, the driving gear element sets the driven gear element in rotation, thereby setting components of the first gear mechanism 20 (such as the first gear ring 38 or the like) in rotation and achieving power transmission.

[0251] In some embodiments, the gear mechanism includes a planetary gear mechanism. The planetary gear mechanism comprises a sun gear, a ring gear, a planet gear set, and a planet carrier. The sun gear is arranged inside the ring gear. The planet gear set is arranged between an inner ring of the ring gear and an outer ring of the sun gear, and the planet gear set meshes with both the ring gear and the sun gear. The planet carrier is connected to a central section of the planet gears of the planet gear set. When the planet gears rotate, the planet carrier is set into rotation.

[0252] Thus, power can be transferred from the support power device 18 through the planetary gear mechanism to the power output shaft 12, resulting in a high efficiency of power transmission and a relatively large torque load capacity.

[0253] More precisely, they are - with reference to Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. 6 - For the sake of simplicity, the sun gear, ring gear, planet gear set and planet carrier of the second gear mechanism 22 are referred to as a second sun gear 48, a second ring gear 50, a second planet gear set 52 or a second planet carrier 54. In some embodiments, the support power device 18 includes an support motor. In the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. As shown in Figure 6, the second sun gear 48 is connected to the output shaft of the support motor, and the second planet carrier 54 is connected to a component of the first gear mechanism 20 (such as the first gear ring 38 or the like).

[0254] When the support motor is operating, it can rotate the second sun gear 48. The second sun gear 48 can rotate the second planetary gear set 52 and the second planet carrier 54, thereby rotating components of the first gear mechanism 20 (such as the first ring gear 38 or the like), thus ensuring that power is transmitted from the support motor via the first gear mechanism 20 to the power output shaft 12 and that support power is provided to the power output shaft 12.

[0255] Since the second sun gear 48 and the second planet gear set 52 are connected by interlocking teeth, efficient power transmission and the transmission of large torques can be achieved.

[0256] The number of planet gears contained in the second planet gear set 52 can be at least one. In the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. Figure 6 shows that the planet gears contained in the second planet gear set 52 are multiple (for example, two or more than two).

[0257] In some embodiments, the planetary gear set comprises several groups of planetary gears, one group of planetary gears being toothed with the sun gear and another group of planetary gears being toothed with the ring gear.

[0258] Thus, power transmission can take place via several groups of planetary gears.

[0259] More precisely, in some embodiments of the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig.Figure 6 shows the planetary gear set consisting of two groups of planet gears, and these two groups of planet gears are meshed with each other. One group of planet gears is meshed with the second sun gear 48, and the other group of planet gears is meshed with the second ring gear 50. The two groups of planet gears are connected to the second planet carrier 54. When the auxiliary motor is operating, it can rotate the second sun gear 48. The second sun gear 48 then rotates the planet gear set to which it is meshed.The planetary gear group rotates the other planetary gear group and the second planet carrier 54, thereby rotating components of the first gear mechanism 20 (such as the first gear ring 38 or the like), thereby realizing a transfer of power from the support motor to the power output shaft 12 and providing support power to the power output shaft 12.

[0260] In some embodiments, the planetary gear set comprises more than two groups of planet gears, and these groups are meshed in pairs. One group of planet gears is meshed with the second sun gear 48, and another group of planet gears is meshed with the second ring gear 50. Other groups of planet gears are meshed with the group of planet gears meshed with the second sun gear 48, or with the group of planet gears meshed with the second ring gear 50, and perform an intermediate power transmission function. A group of planet gears may be connected to the second planet carrier 54. When the auxiliary motor is operating, it can rotate the second sun gear 48. The second sun gear 48 rotates a group of planet gears meshed with it.The planetary gear group rotates the other planetary gear groups and the second planet carrier 54 and transmits power to a component of the first gear mechanism 20 (such as the first gear ring 38 or the like), thereby ensuring that the support motor provides support power to the power output shaft 12.

[0261] In some embodiments, a number of teeth of one group of planetary gears is the same as, or different from, a number of teeth of another group of planetary gears.

[0262] Thus, the number of teeth of the planetary gear set can be configured according to application scenarios.

[0263] More precisely, in some embodiments, the number of teeth in one group of planetary gears is the same as the number of teeth in another group of planetary gears, thus achieving a 1:1 gear ratio. This allows the two groups of planetary gears to change only their direction of rotation without changing their speed or torque.

[0264] In some embodiments, if the number of teeth in one group of planetary gears differs from the number of teeth in another group of planetary gears, a gear ratio other than 1:1 can be achieved. More precisely, the gear ratio is the inverse of the number of teeth in the two groups of planetary gears. For example, if the number of teeth on the planetary gears on one power input side is 8 and the number of teeth on the planetary gears on the power output side is 24, then their gear ratio is 3:1. That is, the speed on the power output side is 1 / 3 of the speed on the power input side, and the torque on the power output side is three times the torque on the power input side.Conversely, if the number of teeth on the planetary gears on the power input side is 24 and the number of teeth on the planetary gears on the power output side is 8, then their gear ratio is 1:3. The speed on the power output side is three times the speed on the power input side, and the torque on the power output side is 1 / 3 of the torque on the power input side.

[0265] If it is necessary to reduce the rotational speed, planetary gears with more teeth can be selected as gears on the output side, and planetary gears with fewer teeth can be selected as gears on the input side. If it is necessary to increase the rotational speed, planetary gears with fewer teeth can be selected as gears on the output side, and planetary gears with more teeth can be selected as gears on the input side. In addition to changes in rotational speed, the torque also changes accordingly. During a speed reduction process, the torque increases. During a speed increase process, the torque decreases.

[0266] In some embodiments, an output shaft of the support power device 18 is connected to the sun gear or the planet carrier.

[0267] Thus, the power delivered by the support power device 18 can be fed into the planetary gear mechanism via the sun gear or the planet carrier.

[0268] More precisely, in some embodiments, the speed control power device 16 includes a speed control motor. In the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. As shown in Figure 6, an output shaft of the speed control motor is connected to the second sun gear 48, so that power delivered by the auxiliary motor can be fed into the planetary gear mechanism via the second sun gear 48. The second planet carrier 54 can be connected to a component of the first gear mechanism 20 (such as the first ring gear 38 or the like).

[0269] When the support motor is operating, it can rotate the second sun gear 48. The second sun gear 48 can rotate the second planetary gear set 52 and the second planet carrier 54, thereby rotating a component of the first gear mechanism 20 (such as the first ring gear 38 or the like), thus transferring power from the support motor to the power output shaft 12 and providing support power to the power output shaft 12.

[0270] In some embodiments, an output shaft of the auxiliary motor is connected to the second planet carrier 54, so that power delivered by the auxiliary motor can be fed into the planetary gear mechanism via the second planet carrier 54. The second sun gear 48 can be connected to the first gear mechanism 20 (such as the first ring gear 38 or the like).

[0271] When the support motor is operating, it can rotate the second planet carrier 54. The second planet carrier 54 can rotate the second planet gear set 52 and the second sun gear 48, thereby rotating a component of the first gear mechanism 20 (such as the first ring gear 38 or the like), thus transferring power from the support motor to the power output shaft 12 and providing support power to the power output shaft 12.

[0272] In some embodiments, the first gear mechanism 20 is connected to the planet carrier or the sun gear.

[0273] Thus, the power transmitted by the planetary gear mechanism can be transferred via the planet carrier or the sun gear to the first gear mechanism 20, thereby providing support power to the power output shaft 12.

[0274] More precisely, the support power device 18 comprises a support motor. In the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig. As shown in Figure 6, a component of the first gear mechanism 20 (such as the first gear ring 38 or the like) is connected to the second planet carrier 54, so that power transmitted by the planetary gear mechanism can be delivered via the second planet carrier 54 to the component of the first gear mechanism 20 (such as the first gear ring 38 or the like). The output shaft of the auxiliary motor can be connected to the second sun gear 48.

[0275] When the support motor is operating, it can rotate the second sun gear 48. The second sun gear 48 can rotate the second planetary gear set 52 and the second planet carrier 54, thereby rotating a component of the first gear mechanism 20 (such as the first ring gear 38 or the like), thus transferring power from the support motor to the power output shaft 12 and providing support power to the power output shaft 12.

[0276] In some embodiments, a component of the first gear mechanism 20 (such as the first ring gear 38 or the like) is connected to the second sun gear 48, so that power transmitted by the planetary gear mechanism can be delivered via the second sun gear 48 to the component of the first gear mechanism 20 (such as the first ring gear 38 or the like). The output shaft of the auxiliary motor can be connected to the second planet carrier 54.

[0277] When the support motor is operating, it can rotate the second planet carrier 54. The second planet carrier 54 can rotate the second planet gear set 52 and the second sun gear 48, thereby rotating a component of the first gear mechanism 20 (such as the first ring gear 38 or the like), thus transferring power from the support motor to the power output shaft 12 and providing support power to the power output shaft 12.

[0278] In some embodiments, the toothed ring is stationary and does not rotate.

[0279] This can improve the stability during operation of the support power device 18.

[0280] More precisely, in the embodiment that is in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig.As shown in Figure 6, the output shaft of the auxiliary motor is connected to the second sun gear 48, and the second planet carrier 54 is connected to a component of the first gear mechanism 20 (such as the first ring gear 38 or the like). When the auxiliary motor is operating, it can rotate the second sun gear 48. The second sun gear 48 rotates the second planet gear set 52 and the second planet carrier 54, thereby rotating the component of the first gear mechanism 20 (such as the first ring gear 38 or the like).The second gear ring 50 of the second gear mechanism 22 is stationary and does not rotate, so that planet gears of the second planet gear set 52, which rotate on an inner ring of the second gear ring 50, can rotate stably and torque can be transmitted from the support motor to the second planet carrier 54 and the component of the first gear mechanism 20 (such as the first gear ring 38 or the like), so that the support power device 18 provides a greater and more stable torque to the power output shaft 12.

[0281] In some embodiments, the output shaft of the support motor is connected to the second planet carrier 54, and the second sun gear 48 is connected to a component of the first gear mechanism 20 (such as the first ring gear 38 or the like).

[0282] In some embodiments, one of the sun gear and planet carrier is connected to the output shaft of the support power device 18, and the other is connected to the first gear mechanism 20.

[0283] Thus, the assist power device 18 can input assist power into the second gear mechanism 22 via the sun gear or the planet carrier, and the second gear mechanism 22 can output power from the assist power device 18 via the planet carrier or the sun gear to a component of the first gear mechanism 20 (such as the first gear ring 38 or the like).

[0284] More precisely, in the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig.As shown in Figure 6, the auxiliary power device 18 is connected to an auxiliary motor. The output shaft of the auxiliary power device 18 can be connected to a rotor of the auxiliary motor. The output shaft of the auxiliary power device 18 is connected to the second sun gear 48, and the second planet carrier 54 is connected to a component of the first gear mechanism 20 (such as the first ring gear 38 or the like). When the auxiliary motor is operating, it can rotate the second sun gear 48. The second sun gear 48 rotates the second planet gear set 52, which in turn rotates the second planet carrier 54 and the component of the first gear mechanism 20 (such as the first ring gear 38 or the like), thus enabling the auxiliary power device 18 to provide auxiliary power to the power input / output shaft 12.

[0285] In some embodiments, the output shaft of the auxiliary power device 18 is connected to the second planet carrier 54, and the second sun gear 48 is connected to a component of the first gear mechanism 20 (such as the first ring gear 38 or the like). When the auxiliary motor is operating, it can rotate the second planet carrier 54. The second planet carrier 54 rotates the second planet gear set 52, which in turn rotates the second sun gear 48 and the component of the first gear mechanism 20 (such as the first ring gear 38 or the like), thus enabling the auxiliary power device 18 to provide auxiliary power to the power input / output shaft 12.

[0286] In some embodiments, the support unit 100 further comprises the third gear mechanism 44. The power input shaft 14 rotates a component of the first gear mechanism 20 via the third gear mechanism 44.

[0287] Therefore, when the auxiliary power device 18 is operating, the power input shaft 14 and the auxiliary power device 18 together can rotate the power output shaft 12. When the auxiliary power device 18 is not operating, the power input shaft 14 alone can rotate the power output shaft 12.

[0288] More precisely, the support power device 18 can be connected to the power output shaft 12 via the second gear mechanism 22 and the first gear mechanism 20. The power output shaft 12 is connected via the third gear mechanism 44 to a component of the first gear mechanism 20 (such as the first gear 38 or the like). When the power input shaft 14 receives power input from the power input device 200, the power input shaft 14 can transmit power to the first gear 38 via the third gear mechanism 44, thereby causing the first gear 38 to rotate.

[0289] The first ring gear 38 can be connected to the first planet carrier 42 via the first planet gear set 40, and the first planet carrier 42 is connected to the power output shaft 12. Thus, the first ring gear 38 can rotate the power output shaft 12, so that power input through the power input shaft 14 is transmitted to the power output shaft 12 via the third gear mechanism 44 and the first gear mechanism 20.

[0290] In the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig.As shown in Figure 6, the support power device 18 is connected to the first gear ring 38 via the second gear mechanism 22. When the support power device 18 is operating, it can rotate the first gear ring 38 via the second gear mechanism 22. Thus, power input by the power input device 200 and support power provided by the support power device 18 can together rotate the first gear ring 38, thereby jointly rotating the power output shaft 12.

[0291] In some embodiments, the third transmission mechanism 44 comprises at least one of the following: a mechanical transmission mechanism, a hydraulic transmission mechanism, a magnetic transmission mechanism, a hydrodynamic transmission mechanism, and an electromagnetic transmission mechanism.

[0292] Thus, the structure of the third gear mechanism 44 can be flexibly configured.

[0293] More precisely, in some embodiments, the third transmission mechanism 44 comprises a mechanical transmission mechanism, a hydraulic transmission mechanism, a magnetic transmission mechanism, a hydrodynamic transmission mechanism, or an electromagnetic transmission mechanism. In some embodiments, the third transmission mechanism 44 comprises any two, any three, or any four of the following: a mechanical transmission mechanism, a hydraulic transmission mechanism, a magnetic transmission mechanism, a hydrodynamic transmission mechanism, and an electromagnetic transmission mechanism.

[0294] Specific descriptions of the mechanical transmission mechanism, the hydraulic transmission mechanism, the magnetic transmission mechanism, the hydrodynamic transmission mechanism and the electromagnetic transmission mechanism can refer to the descriptions of the above embodiments and are not described in detail here.

[0295] In some embodiments, the mechanical transmission mechanism comprises at least one of the following: a gear transmission mechanism, a wheel transmission mechanism, and a worm gear mechanism.

[0296] In this way, the mechanical transmission mechanism has a simple structure and is associated with low costs.

[0297] More precisely, in some embodiments, the mechanical transmission mechanism comprises a gear transmission mechanism, a wheel transmission mechanism, or a worm transmission mechanism. In some embodiments, the mechanical transmission mechanism comprises any two of the following: a gear transmission mechanism, a wheel transmission mechanism, and a worm transmission mechanism.

[0298] For detailed descriptions of the gear mechanism, the wheel mechanism and the worm gear mechanism, reference can be made to the descriptions of the above embodiments, which are not described in detail here.

[0299] In some embodiments, the gear transmission mechanism comprises two gear wheels 32 and a power transmission element 34, wherein one gear wheel 32 is connected to the power input shaft 14, another gear wheel 32 is connected to the first gear mechanism 20, and the power transmission element 34 is connected to the two gear wheels 32 to cause the two gear wheels 32 to rotate together.

[0300] Thus, the power input shaft 14 can rotate a component of the first gear mechanism 20 via the third gear mechanism 44.

[0301] More precisely, of the two gear wheels 32, one can be a driving gear wheel 32, and the other can be a driven gear wheel 32. The driving gear wheel 32 can be connected to the power input shaft 14, and the driven gear wheel 32 can be connected to a component of the first transmission mechanism 20 (such as the first ring gear 38 or the like). The power transmission element 34 is connected to both the driving gear wheel 32 and the driven gear wheel 32. When the power input shaft 14 receives power input from the power input device 200, the power input shaft 14 rotates and sets the driving gear wheel 32 in rotation. As the driving gear wheel 32 rotates, it drives the power transmission element 34 to set the driven gear wheel 32 in rotation.When the driven gear wheel 32 rotates, it sets a component of the first gear mechanism 20 (such as the first gear ring 38 or the like) into rotation, thereby enabling the power input shaft 14 to set a component of the first gear mechanism 20 (such as the first gear ring 38 or the like) into rotation via the third gear mechanism 44.

[0302] In some embodiments, the gear wheel 32 comprises at least one of the following: a pulley and a sprocket.

[0303] The power transmission element 34 comprises at least one of the following: a belt and a chain.

[0304] In this way, the gear mechanism has a simple structure and is easy to assemble.

[0305] More precisely, in some embodiments, the gear wheel 32 includes a pulley, the power transmission element 34 includes a belt, and the belt is connected to the two pulleys to cause the two pulleys to rotate together. In some embodiments, the gear wheel 32 includes a sprocket, the power transmission element 34 includes a chain, and the chain is connected to the two sprockets to cause the two sprockets to rotate together. In some embodiments, the gear wheel 32 includes a pulley and a sprocket, and the power transmission element 34 includes a belt and a chain. The belt is connected to the two pulleys to cause the two pulleys to rotate together, and the chain is connected to the two sprockets to cause the two sprockets to rotate together.

[0306] During assembly, the belt is placed around the outer circumference of the pulley and tensioned, preventing slippage. Alternatively, the chain is placed around the outer circumference of the sprocket and tensioned, preventing slippage and resulting in high assembly efficiency.

[0307] In some embodiments, the support unit 100 further comprises a fourth gear mechanism 46, and the second gear mechanism 22 rotates a component of the first gear mechanism 20 via the fourth gear mechanism 46.

[0308] Thus, the support power device 18 can successively provide power to a component of the first gear mechanism 20 via the second gear mechanism 22 and the fourth gear mechanism 46, thereby providing support power to the power output shaft 12.

[0309] More precisely, in the embodiments described in Fig. 2, Fig. 3, Fig. 4, Fig. 5 to Fig.As shown in Figure 6, the first planet carrier 42 is connected to the power output shaft 12. The auxiliary power device 18 includes an auxiliary motor. When the auxiliary motor is operating, it can set the second gear mechanism 22 in motion, which in turn rotates a component of the fourth gear mechanism 46 and a component of the first gear mechanism 20 (such as the first ring gear 38 or the like). When the first ring gear 38 rotates, it can rotate the first planet gear set 40, which in turn rotates the first planet carrier 42 and the power output shaft 12, thus enabling the auxiliary power device 18 to provide auxiliary power to the power output shaft 12.

[0310] In some embodiments, the fourth transmission mechanism 46 comprises at least one of the following: a mechanical transmission mechanism, a hydraulic transmission mechanism, a magnetic transmission mechanism, a hydrodynamic transmission mechanism, and an electromagnetic transmission mechanism.

[0311] Thus, the structure of the fourth gear mechanism 46 can be flexibly configured.

[0312] More specifically, in some embodiments, the fourth transmission mechanism 46 comprises a mechanical transmission mechanism, a hydraulic transmission mechanism, a magnetic transmission mechanism, a hydrodynamic transmission mechanism, or an electromagnetic transmission mechanism. In some embodiments, the fourth transmission mechanism 46 comprises any two, any three, or any four of the following: a mechanical transmission mechanism, a hydraulic transmission mechanism, a magnetic transmission mechanism, a hydrodynamic transmission mechanism, and an electromagnetic transmission mechanism.

[0313] Regarding specific descriptions of the mechanical transmission mechanism, the hydraulic transmission mechanism, the magnetic transmission mechanism, the hydrodynamic transmission mechanism and the electromagnetic transmission mechanism, reference can be made to the descriptions of the above embodiments; these are not described in detail here.

[0314] It is understood that the structural types of the differential gear mechanism 24, the third gear mechanism 44 and the fourth gear mechanism 46 may be the same or different, and the present disclosure does not impose any restrictions in this regard.

[0315] In some embodiments, the mechanical transmission mechanism comprises at least one of the following: a gear transmission mechanism, a wheel transmission mechanism, and a worm gear mechanism.

[0316] In this way, the mechanical transmission mechanism has a simple structure and is associated with low costs.

[0317] More precisely, in some embodiments, the mechanical transmission mechanism comprises a gear mechanism, a wheel mechanism, and a worm mechanism. In some embodiments, the mechanical transmission mechanism comprises any one or any two of the following: a gear mechanism, a wheel mechanism, and a worm mechanism.

[0318] For detailed descriptions of the gear mechanism, the wheel mechanism and the worm gear mechanism, reference can be made to the descriptions of the above embodiments, which are not described in detail here.

[0319] In some embodiments, the gear mechanism comprises two gear wheels 32 and a power transmission element 34, wherein one gear wheel 32 is connected to the second gear mechanism 22, another gear wheel 32 is connected to the first gear mechanism 20, and the power transmission element 34 is connected to the two gear wheels 32 to cause the two gear wheels 32 to rotate together.

[0320] Thus, the support power device 18 can rotate a component of the first gear mechanism 20 via the second gear mechanism 22 and the fourth gear mechanism 46.

[0321] More precisely, of the two gear wheels 32, one can be a driving gear wheel 32, and the other can be a driven gear wheel 32. The driving gear wheel 32 can be connected to a component of the second gear mechanism 22 (such as the second planet carrier 54 or the like), and the driven gear wheel 32 can be connected to a component of the first gear mechanism 20 (such as the first ring gear 38 or the like). The power transmission element 34 is connected to both the driving gear wheel 32 and the driven gear wheel 32. When the output shaft of the support power device 18 rotates a component of the second gear mechanism 22 (such as the second planet carrier 54 or the like), the second planet carrier 54 can rotate the driving gear wheel 32.When the driving gear wheel 32 rotates, it drives the power transmission element 34 to cause the driven gear wheel 32 to rotate. As the driven gear wheel 32 rotates, it sets a component of the first gear mechanism 20 (such as the first ring gear 38 or the like) into rotation, thereby enabling the assist power device 18 to rotate a component of the first gear mechanism 20 (such as the first ring gear 38 or the like) via the second gear mechanism 22 and the fourth gear mechanism 46, and to provide assist power to the power output shaft 12.

[0322] In some embodiments, the gear wheel 32 comprises at least one of the following: a pulley and a sprocket.

[0323] The power transmission element 34 comprises at least one of the following: a belt and a chain.

[0324] In this way, the gear mechanism has a simple structure and is easy to assemble.

[0325] More precisely, in some embodiments, the gear wheel 32 includes a pulley, the power transmission element 34 includes a belt, and the belt is connected to the two pulleys to cause the two pulleys to rotate together. In some embodiments, the gear wheel 32 includes a sprocket, the power transmission element 34 includes a chain, and the chain is connected to the two sprockets to cause the two sprockets to rotate together. In some embodiments, the gear wheel 32 includes a pulley and a sprocket, and the power transmission element 34 includes a belt and a chain. The belt is connected to the two pulleys to cause the two pulleys to rotate together, and the chain is connected to the two sprockets to cause the two sprockets to rotate together.

[0326] During assembly, the belt is placed around the outer circumference of the pulley and tensioned, preventing slippage. Alternatively, the chain is placed around the outer circumference of the sprocket and tensioned, preventing slippage and resulting in high assembly efficiency.

[0327] In some embodiments - with reference to Fig. 1 and Fig. 3, Fig. 4, Fig. 5 to Fig.6 - The support unit 100 further comprises a clutch 56. The power input shaft 14 rotates a component of the first gear mechanism 20 via the third gear mechanism 44. The clutch 56 is configured to disconnect or connect a power transmission link through which the power input shaft 14 rotates a component of the first gear mechanism 20 via the third gear mechanism 44.

[0328] In this way, the coupling 56 has a simple structure and is associated with low costs.

[0329] Optionally, the clutch 56 can have a first part and a second part. The first part can be connected to the power input shaft 14, and the second part can be connected to a component of the third transmission mechanism 44.

[0330] The first part can engage with and disengage from the second part. When the first part is engaged with the second part, the clutch 56 can establish the power transmission connection through which the power input shaft 14 rotates a component of the first transmission mechanism 20 via the third transmission mechanism 44. When the first part disengages from the second part, the clutch 56 can disengage the power transmission connection through which the power input shaft 14 rotates a component of the first transmission mechanism 20 via the third transmission mechanism 44.

[0331] The coupling 56 is based on mature technology and has a simple structure, which can effectively reduce the cost of the support unit 100.

[0332] In some embodiments, the coupling 56 includes a one-way bearing 30.

[0333] Thus, the power transmission connection via the one-way bearing 30 can be disconnected and reconnected.

[0334] More precisely, the one-way bearing 30 allows a shaft to rotate freely in one direction, while locking it or generating high resistance in the other direction.

[0335] If the rotational speed of the power input shaft 14 is greater than or equal to the rotational speed of the third gear mechanism 44, the one-way bearing 30 can establish the power transmission connection through which the power input shaft 14 rotates a component of the first gear mechanism 20 via the third gear mechanism 44. Thus, the power input shaft 14 can rotate a component of the first gear mechanism 20 (such as the first gear ring 38 in the drawings) via the third gear mechanism 44, thereby rotating the power output shaft 12.

[0336] If the rotational speed of the power input shaft 14 is lower than the rotational speed of the third gear mechanism 44, the one-way bearing 30 can disengage the power transmission connection through which the power input shaft 14 rotates a component of the first gear mechanism 20 via the third gear mechanism 44. At this point, the power input shaft 14 can no longer rotate any component of the first gear mechanism 20 via the third gear mechanism 44.

[0337] In some embodiments, the one-way bearing 30 is connected to the power input shaft 14, and the third gear mechanism 44 is connected to the power input shaft 14 via the one-way bearing 30.

[0338] Therefore, the installation of the 30-piece disposable storage system is simple, and efficiency is high.

[0339] More precisely, the one-way bearing 30 is able to disconnect or establish the power transmission connection through which the power input shaft 14 rotates a component of the first gear mechanism 20 via the third gear mechanism 44, thereby ensuring that power received by the power input shaft 14 is transmitted from the third gear mechanism 44 to the first gear mechanism 20, and that no power can be transmitted from the third gear mechanism 44 to the power input shaft 14.

[0340] In some embodiments, when the rotational speed of the third gear mechanism 44 is greater than the rotational speed of the power input shaft 14, the one-way bearing 30 disconnects the power transmission connection through which the power input shaft 14 rotates a component of the first gear mechanism 20 via the third gear mechanism 44.

[0341] Thus, the one-way bearing 30 enables unidirectional power transmission.

[0342] More precisely, when the rotational speed of the third gear mechanism 44 is greater than the rotational speed of the power input shaft 14, the one-way bearing 30 disconnects the power transmission connection through which the power input shaft 14 rotates a component of the first gear mechanism 20 via the third gear mechanism 44, so that power cannot be transmitted from the third gear mechanism 44 to the power input shaft 14.

[0343] If the rotational speed of the third gear mechanism 44 is less than or equal to the rotational speed of the power input shaft 14, the one-way bearing 30 establishes the power transmission connection through which the power input shaft 14 rotates a component of the first gear mechanism 20 via the third gear mechanism 44, so that power from the power input shaft 14 can rotate a component of the first gear mechanism 20 (such as the first gear ring 38 or the like) via the third gear mechanism 44, thereby realizing a transmission of power from the power input shaft 14 to the power output shaft 12.

[0344] In some embodiments, the output shaft of the support power device 18 is a hollow shaft, and the power input shaft 14 passes through the output shaft of the support power device 18.

[0345] This allows for the realization of a compact and cost-effective support unit 100, which is advantageous for a miniaturized design of the support unit 100.

[0346] More precisely, routing the power input shaft 14 through the output shaft of the support power device 18 avoids the space required by a separate arrangement of the power input shaft 14. Furthermore, an additional gear mechanism can be eliminated, which would be necessary if the power input shaft 14 were located outside the output shaft of the support power device 18.

[0347] In some embodiments, the assist power device 18 includes an assist motor, and a rotor of the assist motor may be connected to the output shaft of the assist power device 18. When the assist motor is operating, it can rotate the output shaft. The output shaft can rotate a component of the first gear mechanism 20 via the second gear mechanism 22, thereby providing assist power to the power output shaft 12. When the power input shaft 14 rotates, it can rotate a component of the first gear mechanism 20 via the third gear mechanism 44, thereby transferring power from the power input device 200 to the power output shaft 12.

[0348] In some embodiments, the output shaft of the support power device 18 is able to rotate relative to the power input shaft 14.

[0349] Thus, the output shaft of the support power device 18 and the power input shaft 14 can rotate independently of each other.

[0350] More precisely, the power input shaft 14 passes through the hollow output shaft of the auxiliary power device 18, and the output shaft of the auxiliary power device 18 is able to rotate relative to the power input shaft 14. That is, when the auxiliary motor is operating, it can set the output shaft in rotation. The output shaft can then rotate a component of the first gear mechanism 20 via the second gear mechanism 22, thereby providing auxiliary power to the power output shaft 12.

[0351] In some embodiments, a bearing is provided between the output shaft of the support power device 18 and the power input shaft 14.

[0352] Thus, a rotating connection structure between the output shaft of the support power device 18 and the power input shaft 14 is simple and cost-effective.

[0353] More precisely, the bearing has an inner ring and an outer ring. The output shaft of the support power device 18 is a hollow shaft, and the power input shaft 14 passes through the output shaft of the support power device 18. The bearing can be located inside the output shaft of the support power device 18. The outer ring of the bearing is fixed to the output shaft of the support power device 18. The power input shaft 14 can pass through the inner ring of the bearing and can be fixed to the inner ring of the bearing, so that the output shaft of the support power device 18 is able to rotate relative to the power input shaft 14 via the bearing.

[0354] The number of bearings arranged inside the output shaft of the support power device 18 can be one or more. Multiple bearings can be arranged at regular intervals inside the output shaft of the support power device 18 to provide more stable support for the power input shaft 14.

[0355] In some embodiments, the support power device 18 and at least some components of the second gear mechanism 22 are arranged along a direction of extension of the power input shaft 14.

[0356] Thus, a structurally compact support unit 100 can be realized, which is advantageous for a miniaturized design of the support unit 100.

[0357] More precisely, the fact that the support power device 18 and at least some components of the second gear mechanism 22 are arranged along one direction of extension of the power input shaft 14 can reduce the space occupied by components of the support unit 100 in a direction perpendicular to the direction of extension of the power input shaft 14. A structurally compact support unit 100 can be realized, which is advantageous for a miniaturized design of the support unit 100.

[0358] In the illustrated embodiments, the second transmission mechanism 22 comprises a planetary gear mechanism. The planetary gear mechanism includes the second sun gear 48 and the second planet carrier 54. The power input shaft 14 passes through the second sun gear 48 and the second planet carrier 54. The auxiliary power device 18, the second sun gear 48, and the second planet carrier 54 are arranged along the direction of extension of the power input shaft 14.

[0359] In some other embodiments, other components of the second gear mechanism 22 and the support power device 18 can be arranged along the direction of extension of the power input shaft 14. Alternatively, all components of the support power device 18 and the second gear mechanism 22 can be arranged along the direction of extension of the power input shaft 14.

[0360] In some embodiments, at least some components of the second transmission mechanism 22 are pushed onto the power input shaft 14.

[0361] Thus, the assembly of at least some components of the second gear mechanism 22 on the power input shaft 14 is simple, which is advantageous for improving the efficiency of the assembly.

[0362] More precisely, in the illustrated embodiments, the second gear mechanism 22 comprises a planetary gear mechanism. The planetary gear mechanism includes the second sun gear 48 and the second planet carrier 54. The second sun gear 48 and the second planet carrier 54 are slid onto the power input shaft 14. The second sun gear 48 and the second planet carrier 54 can provide space for the passage of the power input shaft 14. During assembly, the power input shaft 14 can be passed directly through the second sun gear 48 and the second planet carrier 54, so that the second sun gear 48 and the second planet carrier 54 are slid onto the power input shaft 14, which is advantageous for improving assembly efficiency.

[0363] In some other embodiments, other components of the second gear mechanism 22 can be slid onto the power input shaft 14. Alternatively, all components of the second gear mechanism 22 can be slid onto the power input shaft 14.

[0364] In some embodiments, the support power device 18 is pushed onto the power input shaft 14.

[0365] Thus, the mounting of the support power device 18 on the power input shaft 14 is simple, which is advantageous for improving the efficiency of the assembly.

[0366] More precisely, in the illustrated embodiments, the support power device 18 comprises an output shaft. The output shaft of the support power device 18 is a hollow shaft, and space is reserved within the output shaft of the support power device 18 for the passage of the power input shaft 14. During assembly, the power input shaft 14 can be inserted directly into the output shaft of the support power device 18, so that the support power device 18 is slid onto the power input shaft 14, which is advantageous for improving assembly efficiency.

[0367] In some embodiments, the output shaft of the support power device 18 and the power input shaft 14 are arranged coaxially.

[0368] Thus, a structurally compact support unit 100 can be realized, which is advantageous for a miniaturized design of the support unit 100.

[0369] More precisely, the fact that the output shaft of the support power device 18 and the power input shaft 14 are arranged coaxially reduces the space that would be required in a direction perpendicular to the direction of extension of the power input shaft 14 if the output shaft of the support power device 18 and the power input shaft 14 were arranged eccentrically. A structurally compact support unit 100 can be realized, which is advantageous for a miniaturized design of the support unit 100.

[0370] Furthermore, the coaxial arrangement of the output shaft of the support power device 18 and the power input shaft 14 is easy to implement. In some embodiments, a bearing is arranged inside the output shaft of the support power device 18, and the power input shaft 14 passes through the bearing, so that the output shaft of the support power device 18 and the power input shaft 14 can be arranged coaxially and the output shaft of the support power device 18 is able to rotate relative to the power input shaft 14.

[0371] In some embodiments, the speed control power device 16 and at least some components of the first transmission mechanism 20 are arranged along a direction of extension of the power output shaft 12.

[0372] Thus, a structurally compact support unit 100 can be realized, which is advantageous for a miniaturized design of the support unit 100.

[0373] More precisely, the fact that the speed control power device 16 and at least some components of the first gear mechanism 20 are arranged along the direction of extension of the power output shaft 12 can reduce the space occupied by components of the support unit 100 in a direction perpendicular to the direction of extension of the power output shaft 12. A structurally compact support unit 100 can be realized, which is advantageous for a miniaturized design of the support unit 100.

[0374] In the illustrated embodiments, the first transmission mechanism 20 comprises a planetary gear mechanism. The planetary gear mechanism includes the first sun gear 36 and the first ring gear 38. The speed control power device 16, the first sun gear 36, and the first ring gear 38 are arranged along the direction of extension of the power output shaft 12.

[0375] In some other embodiments, other components of the first transmission mechanism 20 and the speed control power device 16 can be arranged along the direction of extension of the power output shaft 12. Alternatively, all components of the speed control power device 16 and the first transmission mechanism 20 can be arranged along the direction of extension of the power output shaft 12.

[0376] In some embodiments, at least some components of the first transmission mechanism 20 are pushed onto an extension line of the power output shaft 12.

[0377] Thus, the assembly of at least some components of the first gear mechanism 20 on the power input shaft 14 is simple, which is advantageous for improving the efficiency of the assembly.

[0378] More precisely, in the illustrated embodiments, the first gear mechanism 20 comprises a planetary gear mechanism. The planetary gear mechanism includes the first sun gear 36 and the first ring gear 38. The first sun gear 36 and the first ring gear 38 can be slid onto the extension line of the power output shaft 12. The first sun gear 36 and the first ring gear 38 can reserve space for assembly. During assembly, the first sun gear 36 and the first ring gear 38 can be mounted according to the position of the extension line of the power output shaft 12, so that the first sun gear 36 and the first ring gear 38 are slid onto the extension line of the power output shaft 12, which is advantageous for improving assembly efficiency. The first planet carrier 42 can be passed through the first ring gear 38 to be connected to the power output shaft 12.

[0379] In some other embodiments, other components of the first transmission mechanism 20 can be slid onto the extension line of the power output shaft 12. Alternatively, all components of the first transmission mechanism 20 can be slid onto the extension line of the power input shaft 14.

[0380] In some embodiments, the output shaft of the speed control power device 16 and the power output shaft 12 are arranged coaxially.

[0381] Thus, a structurally compact support unit 100 can be realized, which is advantageous for a miniaturized design of the support unit 100.

[0382] More precisely, the coaxial arrangement of the output shaft of the speed control power device 16 and the power output shaft 12 can reduce the space that would be required in a direction perpendicular to the direction of extension of the power output shaft 12 if the output shaft of the speed control power device 16 and the power output shaft 12 were arranged eccentrically. A structurally compact support unit 100 can be realized, which is advantageous for a miniaturized design of the support unit 100.

[0383] In some embodiments, the rotational speed of the power output shaft 12 increases to the extent that the rotational speed of the speed control power device 16 and / or the rotational speed of the power input shaft 14 increases.

[0384] Thus, the speed of the power output shaft 12 is in a positive correlation relationship with the speed of the speed control power device 16 and / or the speed of the power input shaft 14.

[0385] More precisely, in some embodiments, the rotational speed of the power output shaft 12 increases in proportion to the rotational speed of the speed control power device 16. The speed control power device 16 can be connected to the power output shaft 12 via the first gear mechanism 20. In the illustrated embodiments, the output shaft of the speed control power device 16 is connected to the first sun gear 36, and the first planet carrier 42 is connected to the power output shaft 12. When the speed control motor of the speed control power device 16 is operating, it can rotate the output shaft of the speed control power device 16, thereby rotating the first sun gear 36. The first sun gear 36 rotates the first planet gear set 40, which in turn rotates the first planet carrier 42 and the power output shaft 12.The higher the speed of the speed control motor, the more power is transmitted via the first gear mechanism 20 to the power output shaft 12, and the higher the speed of the power output shaft 12.

[0386] In some embodiments, the rotational speed of the power output shaft 12 increases in proportion to the rotational speed of the power input shaft 14. In the illustrated embodiments, the power input shaft 14 can be connected to the power output shaft 12 via the third gear mechanism 44 and the first gear mechanism 20. More precisely, the power input shaft 14 is connected via the third gear mechanism 44 to a component of the first gear mechanism 20 (such as the first ring gear 38 or the like). The first ring gear 38 is connected to the first planetary gear set 40. The first planetary gear set 40 is connected to the power output shaft 12 via the first planet carrier 42. The power input shaft 14 receives power input from the power input device 200 and can set the third gear mechanism 44 in motion, thereby causing the first ring gear 38 to rotate.The first gear ring 38 sets the first planetary gear set 40 in rotation, which in turn sets the first planet carrier 42 and the power output shaft 12 in rotation. The higher the speed of the power input shaft 14, the more power is transmitted to the power output shaft 12 via the third gear mechanism 44 and the first gear mechanism 20, and the higher the speed of the power output shaft 12.

[0387] In some embodiments, the rotational speed of the power output shaft 12 increases in proportion to the increase in the rotational speed of the speed control power device 16 and the rotational speed of the power input shaft 14. If both the speed control power device 16 and the power input shaft 14 are operating, and if the rotational speed of the speed control power device 16 is greater than the rotational speed of the power input shaft 14, the speed control power device 16 can cause the power output shaft 12 to rotate, and the rotational speed of the power output shaft 12 increases in proportion to the increase in the rotational speed of the speed control power device 16.If the rotational speed of the power input shaft 14 is greater than the rotational speed of the speed control power device 16, the power input shaft 14 can rotate the power output shaft 12, and the rotational speed of the power output shaft 12 increases in proportion to the increase in the rotational speed of the power input shaft 14. If the speed control power device 16 is not operating and the power input shaft 14 is operating, the power input shaft 14 can rotate the power output shaft 12, and the rotational speed of the power output shaft 12 increases in proportion to the increase in the rotational speed of the power input shaft 14.When the speed control power device 16 is operating and the power input shaft 14 is not operating, the speed control power device 16 can rotate the power output shaft 12, and the speed of the power output shaft 12 increases as the speed of the speed control power device 16 increases.

[0388] In some embodiments, the speed of the speed control power device 16 is controlled on the basis of the speed of the power input shaft 14.

[0389] Thus, the speed control power device 16 can be used to meet the speed requirements of the power output shaft 12.

[0390] More precisely, the support unit 100 can include a controller and a speed sensor. The speed control power device 16 includes a speed control motor. The controller is electrically connected to the speed sensor and the speed control motor. The speed sensor is capable of detecting the rotational speed of the power input shaft 14 (such as the cadence of a pedal). The controller regulates the speed of the speed control power device 16 based on the rotational speed of the power input shaft 14 in order to meet the rotational speed requirement of the power output shaft 12.

[0391] In some embodiments, the planetary gear mechanism of the first gear mechanism 20 comprises the first sun gear 36, the first planet carrier 42, and the first ring gear 38. The planetary gear mechanism of the second gear mechanism 22 comprises the second planet carrier 54.

[0392] (1) Let n1S1, n1R1 and n1C1 be rotational speeds of the first sun gear 36, the first ring gear 38 and the first planet carrier 42 respectively, and α1 be the tooth ratio or pitch circle radius ratio between the first ring gear 38 and the first sun gear 36.

[0393] (2) Let TS1, TR1 and TC1 be torques of the first sun gear 36, the first ring gear 38 and the first planet carrier 42 respectively, and let α1 be the tooth ratio or pitch circle radius ratio between the first ring gear 38 and the first sun gear. Speed ​​ratio:n1S1+α1×n1R1=(1+α1)×n1C1; Torque ratio:TS1:TR1:TC1=1:α1:−(1+α1);

[0394] (a) Since the first gear ring 38 is connected to the power input shaft 14 via the power transmission element 34 of the third gear mechanism 44 and two gear wheels 32, n1R1 = V Eingangsleistung ;

[0395] (b) The first sun gear 36 is connected to the output shaft of the speed control power device 16, such that n1S1 = V Drehzahlregelungsmotor ;

[0396] (c) Since the power input shaft 14 and the second planet carrier 54 of the second gear mechanism 22 are connected via the fourth gear mechanism 46 and the third gear mechanism 44, TR1 = T Eingangsleistung +TC2, where TC2 is a torque of the second planetary carrier 54;

[0397] (d) Since the first planet carrier 42 is connected to the power output shaft 12, VOutput=n1C1,VOutput=TC1, and TSpeed ​​control motor=TS1.

[0398] That is why Vspeed control motor+α1×Vinput power=(1+α1)×Voutput power(A); TS1:TR1:TC1=TSpeed ​​control motor:(TR1=TInput power+TC2):TOutput=1:α1:−(1+α1)(B).

[0399] When the power transmission link, through which the support power device 18 rotates the speed control power device 16 via the differential gear mechanism 24, is disconnected, the support unit 100 is in gear-shift mode. In gear-shift mode, the speed of the speed control power device 16 is adjustable. Formula A shows that when a required speed V Ausgangsleistung the power output shaft 12 is fixed, the speed V Drehzahlregelungsmotor the speed control power device 16 based on the speed V Eingangsleistung the power input shaft 14 can be regulated in order to meet the speed requirement of the power output shaft 12.

[0400] It is understood that in some other embodiments, where the transmission mechanism uses other types of structures to realize a power transmission, a mapping relationship between the speed of the speed control power device 16, the speed of the power input shaft 14 and the speed of the power output shaft 12 can be established in combination with the above analysis process.

[0401] In some embodiments, the torque of the power output shaft 12 increases to the same extent as the torque of the support power device 18 and the torque of the power input shaft 14 increase.

[0402] Thus, the torque of the power output shaft 12 is in a positive correlation relationship with the torque of the support power device 18 and with the torque of the power input shaft 14.

[0403] More precisely, in the drawings, the auxiliary power device 18 can be connected to the power output shaft 12 via the second gear mechanism 22, the fourth gear mechanism 46, and the first gear mechanism 20. In the illustrated embodiments, the output shaft of the auxiliary power device 18 is connected to the second sun gear 48. The second planet carrier 54 is connected to the first ring gear 38 of the first gear mechanism 20 via the fourth gear mechanism 46. The first ring gear 38 is connected to the first planet gear set 40, and the first planet gear set 40 is connected to the power output shaft 12 via the first planet carrier 42. When the auxiliary motor of the auxiliary power device 18 is operating, it can rotate the output shaft of the auxiliary power device 18, thereby rotating the second sun gear 48.The second sun gear 48 rotates the second planet gear set 52, which in turn rotates the second planet carrier 54 and the first ring gear 38, thus rotating the power output shaft 12. The greater the torque of the auxiliary motor, the more power is transmitted to the power output shaft 12 via the second gear mechanism 22, the fourth gear mechanism 46, and the first gear mechanism 20, and the greater the torque of the power output shaft 12.

[0404] In the illustrated embodiments, the power input shaft 14 is connected to the power output shaft 12 via the third gear mechanism 44 and the first gear mechanism 20. More precisely, the power input shaft 14 is connected via the third gear mechanism 44 to the first ring gear 38 of the first gear mechanism 20. The first ring gear 38 is connected to the first planetary gear set 40, and the first planetary gear set 40 is connected to the power output shaft 12 via the first planet carrier 42. The power input shaft 14 receives a torque input from the power input device 200 and sets the third gear mechanism 44 in motion, thereby causing the first ring gear 38 to rotate. The first ring gear 38 sets the first planetary gear set 40 in rotation, thereby causing the first planet carrier 42 and the power output shaft 12 to rotate.The greater the torque of the power input shaft 14, the more power is transmitted via the third gear mechanism 44 and the first gear mechanism 20 to the power output shaft 12, and the higher the torque of the power output shaft 12.

[0405] If the torque of the power input shaft 14 is insufficient, torque from the support power device 18 can be used to provide support power to the power output shaft 12.

[0406] In some embodiments, the torque of the support power device 18 is controlled on the basis of the torque of the power input shaft 14.

[0407] Thus, the support power device 18 can be used to meet the torque requirements of the power output shaft 12.

[0408] More precisely, the support unit 100 can include a controller and a torque sensor. The support power device 18 includes a support motor. The controller is electrically connected to the torque sensor and the support motor. The torque sensor is capable of detecting torque from the power input shaft 14 (such as the torque of a pedal). The controller regulates the torque of the support power device 18 based on the torque of the power input shaft 14 in order to meet the torque requirement of the power output shaft 12.

[0409] In some embodiments, the planetary gear mechanism of the second gear mechanism 22 comprises the second sun gear 48, the second planet carrier 54, and the second ring gear 50. The planetary gear mechanism of the first gear mechanism 20 comprises the first planet carrier 42.

[0410] Let n2S2, n2R2 and n2C2 be rotational speeds of the second sun gear 48, the second ring gear 50 and the second planet carrier 54 respectively, and α Korpus be the tooth ratio or the pitch circle radius ratio between the second gear ring 50 and the second sun gear 48.

[0411] (2) Let TS2, TR2 and TC2 be torques of the second sun gear 48, the second ring gear 50 and the second planet carrier 54 respectively, and α Korpus be the tooth ratio or the pitch circle radius ratio between the second gear ring 50 and the second sun gear 48. Speed ​​ratio:n2S2+α2×n2R2=(1+α2)×n2C2; Torque ratio: TS2:TR2:TC2=1:α2:−(1+α2);

[0412] The second gear 50 is stationary, the second sun gear 48 is connected to the output shaft of the auxiliary power device 18, and the second planet carrier 54 is connected via the fourth gear mechanism 46 to the first gear 38 of the first gear mechanism 20. Therefore: VSupport motor=n2S2; TSupport motor=TS2; Vsupport motor=n2S2=(1+α2)×n2C2; TSupport motor:TC2=1:−(1+α2);

[0413] From the above, it can be deduced that:

[0414] If VInput power>1 / (1+α2)×VSupport motor,VSpeed ​​control motor+α1×VInput power=(1+α1)×VOutput(A); or

[0415] If Input power <1 / (1+α2)×V Assist motor, VSpeed ​​control motor + α1 × (1 / (1 + α2) × VSupport motor) = (1 + α1) × VOutput (B1); VSpeed ​​control motor:(TInput power+(1+α2)×TSupport motor):TOutput power=1:α1:−(1+α1)(C).

[0416] If the support power device 18 is able to rotate the speed control power device 16 via the differential gear mechanism 24, the support unit 100 is in fixed-gear mode. In fixed-gear mode, the speed and torque of the speed control power device 16 remain unchanged. Formula C shows that if a torque T Drehzahlregelungsmotor from the speed control power device 16 and a required torque T Ausgangsleistung the power output shaft 12 are fixed, a torque T Unterstützungsmotor from the support power device 18 based on the torque T Eingangsleistung the power input shaft 14 can be regulated in order to meet the torque requirements of the power output shaft 12.

[0417] It is understood that in some other embodiments, where the transmission mechanism uses other types of structures to realize a power transmission, a mapping relationship between the torque of the support power device 18, the torque of the power input shaft 14 and the torque of the power output shaft 12 can be established in combination with the above analysis process.

[0418] In some embodiments, if the rotational speed of the auxiliary motor is greater than or equal to the rotational speed of the power input shaft 14, the power input shaft 14 is connected to the third gear mechanism 44 via the coupling 56 (such as the one-way bearing 30), since the power input shaft 14 to the auxiliary motor has a mechanical connection with a fixed gear ratio. When the auxiliary power device 18 provides auxiliary power, the coupling 56 establishes the power transmission connection through which the power input shaft 14 rotates a component of the first gear mechanism 20 (such as the first gear ring 38 or the like) via the third gear mechanism 44.The rotational speed of the support motor after a reduction in speed to the first gear 38 and the rotational speed of the power input shaft 14 after an increase in speed to the first gear 38 have the same magnitude and direction. If the power input device 200 suddenly stops supplying power (for example, if a person suddenly stops pedaling), the rotational speed of the support motor cannot immediately drop to zero. In this situation, the clutch 56 disengages the power transmission connection through which the power input shaft 14 rotates a component of the first gear mechanism 20 (such as the first gear 38 or the like) via the third gear mechanism 44.The speed of the support motor is higher than the speed of the power input shaft 14 (for example, a cadence or the like), which ensures that the support motor does not pull the foot along when turning and thus cause an undesirable riding sensation.

[0419] In some embodiments, the support power device 18 in the fixed gear mode - for example, when the clutch 56 of the switching device 28 establishes the power transmission connection through which the support power device 18 rotates the speed control power device 16 via the differential gear mechanism 24, and at low vehicle speed - can compensate for a torque to the speed control power device 16 via the differential gear mechanism 24 and can also compensate for an insufficient torque of the power input shaft 14 at the first gear ring 38 via the fourth gear mechanism 46.In gearshift mode, the auxiliary power device 18 can compensate for insufficient torque of the power input shaft 14 at the first gear ring 38 via the fourth gear mechanism 46 – for example, when the clutch 56 of the shifting device 28 disengages the power transmission connection through which the auxiliary power device 18 rotates the speed control power device 16 via the differential gear mechanism 24, and at high vehicle speed. In this situation, the torque of the speed control power device 16 and the torque of the auxiliary power input motor can meet the system requirements.

[0420] In the illustrated embodiments, both the first gear mechanism 20 and the second gear mechanism 22 comprise planetary gear mechanisms. A direction of rotation relationship between the power input shaft 14, the power output shaft 12, the first gear mechanism 20, and components of the second gear mechanism 22 is shown in the following table. component Direction of rotation Power input shaft 14 Forward First gear mechanism 20 First sun wheel 36 Forward First sprocket 38 Forward First planetary carrier 42 Forward Second gear mechanism 22 Second sun wheel 48 Forward Second sprocket 50 Firmly Second planetary carrier 54 Forward Power output shaft 12 Forward

[0421] The specific directions of rotation for forward and reverse can be determined according to requirements and are not subject to any restrictions in this text. It is understood that in some other embodiments, increasing or decreasing the number of components and / or changing the structure may alter the rotational relationships described above, and this disclosure is not limited to the rotational relationships shown in the table above.

[0422] In some embodiments, the power input shaft 14 and the power output shaft 12 are arranged in a direction perpendicular to the power output shaft 12 at a distance from each other.

[0423] This allows the spatial arrangement of other components of the support unit 100 to be configured appropriately.

[0424] More precisely, the power output shaft 12 is configured to deliver power, and the power input shaft 14 is configured to receive power input from the power input device 200 and transmit the power to the power output shaft 12. The power input shaft 14 and the power output shaft 12 are arranged in a direction perpendicular to the power output shaft 12 at a distance from each other such that other components of the support unit 100 can be spatially arranged according to the positions of the power input shaft 14 and the power output shaft 12, which is advantageous for improving assembly efficiency.

[0425] In some embodiments, the speed control power device 16 is connected to the power output shaft 12 via the first gear mechanism 20, and the support power device 18 is connected to the first gear mechanism 20 via the second gear mechanism 22. Thus, the positions of the speed control power device 16, the support power device 18, the first gear mechanism 20, and the second gear mechanism 22 can be arranged according to the positions of the power output shaft 12 and the power input shaft 14.

[0426] In some embodiments, the direction of extension of the power input shaft 14 runs essentially parallel to the direction of extension of the power output shaft 12.

[0427] Thus, a structurally compact support unit 100 can be realized, which is advantageous for a miniaturized design of the support unit 100.

[0428] More precisely, the fact that the direction of extension of the power input shaft 14 is essentially parallel to the direction of extension of the power output shaft 12 allows the support power device 18 and the second gear mechanism 22 to be arranged along the direction of extension of the power input shaft 14, and allows the speed control power device 16 and the first gear mechanism 20 to be arranged along the direction of extension of the power output shaft 12.

[0429] Optionally, the support power device 18 and at least some components of the second gear mechanism 22 are pushed onto the power input shaft 14, and the speed control power device 16 and the first gear mechanism 20 are arranged along the extension direction of the power output shaft 12.

[0430] If the direction of extension of the power input shaft 14 is essentially parallel to the direction of extension of the power output shaft 12, other components of the support unit 100 can be arranged along two mutually parallel positions, so that the structural arrangement of the support unit 100 becomes tidier and a compact support unit 100 can be realized, which is advantageous for a miniaturized design of the support unit 100.

[0431] In some embodiments, the power input device 200 is coaxially connected to the power input shaft 14.

[0432] Thus, a structurally compact support unit 100 can be realized, which is advantageous for a miniaturized design of the support unit 100.

[0433] More precisely, the fact that the power input device 200 is coaxially connected to the power input shaft 14 reduces the space that would be required in a direction perpendicular to the extension direction of the power input shaft 14 if the power input device 200 and the power input shaft 14 were connected eccentrically. Thus, a structurally compact support unit 100 can be realized, which is advantageous for a miniaturized design of the support unit 100.

[0434] The coaxial connection between the power input device 200 and the power input shaft 14 also facilitates the connection between the power input device 200 and the power input shaft 14.

[0435] In some embodiments, the power input device 200 comprises at least one of the following: an electric motor, an internal combustion engine and a pedal crank mechanism.

[0436] Thus, the support unit 100 has a relatively wide range of applications.

[0437] More precisely, in some embodiments, the power input device 200 comprises an electric motor, an internal combustion engine, and a pedal crank mechanism. An output shaft of the electric motor can be connected to the power input shaft 14. The electric motor consumes electrical energy to rotate its output shaft, which in turn rotates the power input shaft 14, thus generating a power input. The electric motor can be used, among other things, in electrically assisted bicycles, electric motorcycles, and electric vehicles.

[0438] An output shaft of the internal combustion engine can be connected to the power input shaft 14. The internal combustion engine consumes fuel to rotate its output shaft, which in turn rotates the power input shaft 14, thus generating power. The internal combustion engine can be used in, among other things, electrically assisted bicycles, electric motorcycles, and electric vehicles.

[0439] A crankshaft of the pedal-crank mechanism can be connected to the power input shaft 14. A rider can step on pedals connected to the crankshaft, causing the crankshaft of the pedal-crank mechanism to rotate, thereby rotating the power input shaft 14 and generating power input. The pedal-crank mechanism can be used on bicycles, tricycles, or similar vehicles, among other things.

[0440] In some embodiments, the power input device 200 comprises any one or any two inputs from an electric motor, an internal combustion engine and a pedal crank mechanism.

[0441] In some embodiments, the power input device 200 is permanently connected to the power input shaft 14.

[0442] In this way, the efficiency of the power transmission can be improved, the structure of the support unit 100 can be simplified, and a miniaturized design of the support unit 100 is facilitated.

[0443] More precisely, a fixed connection between the power input device 200 and the power input shaft 14 eliminates a connection mechanism that would be required for a movable connection between the power input device 200 and the power input shaft 14. In general, the number of components required for a movable connection is greater than that required for a fixed connection, and the structure of a movable connection is more complex than that of a fixed connection.

[0444] A fixed connection between the power input device 200 and the power input shaft 14 can reduce power losses caused by a movable connection between the power input device 200 and the power input shaft 14. Generally, components of a connection mechanism generate relative movement during a movable connection, which causes friction losses, and further power losses occur as a result of tolerances that arise when components of the connection mechanism are movably connected.

[0445] Methods for permanently connecting the power input device 200 and the power input shaft 14 include, among others, welding, snapping, screwing or the like.

[0446] In some embodiments, the speed control power device 16 comprises at least one of the following: an electric motor and an internal combustion engine.

[0447] Thus, the support unit 100 has a relatively wide range of applications.

[0448] More precisely, in some embodiments, the speed control power device 16 comprises an electric motor and an internal combustion engine. An output shaft of the electric motor can serve as the output shaft of the speed control power device 16 and can be connected to the first transmission mechanism 20. The electric motor consumes electrical energy to rotate its output shaft, thereby setting the first transmission mechanism 20 in motion and rotating the power output shaft 12 to effect a gear change.

[0449] An output shaft of the internal combustion engine can serve as the output shaft of the speed control power device 16 and can be connected to the first transmission mechanism 20. The internal combustion engine consumes fuel to rotate its output shaft, thereby setting the first transmission mechanism 20 in motion and rotating the power output shaft 12 to effect a gear change.

[0450] In some other embodiments, the speed control power device 16 comprises an electric motor or an internal combustion engine.

[0451] In some embodiments, the support power device 18 comprises at least one of the following: an electric motor and an internal combustion engine.

[0452] Thus, the support unit 100 has a relatively wide range of applications.

[0453] More precisely, in some embodiments, the auxiliary power device 18 comprises an electric motor and an internal combustion engine. An output shaft of the electric motor can serve as the output shaft of the auxiliary power device 18 and can be connected to the second gear mechanism 22 and the differential gear mechanism 24. The electric motor consumes electrical energy to rotate its output shaft, thereby setting the second gear mechanism 22 and the differential gear mechanism 24 in motion, thus providing auxiliary power to the power output shaft 12. When associated information about the power to be delivered by the speed control power device 16 exceeds a preset threshold, the electric motor rotates the speed control power device 16 via the differential gear mechanism 24.

[0454] An output shaft of the internal combustion engine can serve as the output shaft of the auxiliary power device 18 and can be connected to the second transmission mechanism 22 and the differential gear mechanism 24. The internal combustion engine consumes fuel to rotate its output shaft, thereby setting the second transmission mechanism 22 and the differential gear mechanism 24 in motion, thus providing auxiliary power to the power output shaft 12. When associated information about the power to be delivered by the speed control power device 16 exceeds a preset threshold, the internal combustion engine rotates the speed control power device 16 via the differential gear mechanism 24.

[0455] In some other embodiments, the support power device 18 comprises an electric motor or an internal combustion engine.

[0456] In some embodiments, a vehicle to which the support unit 100 is applied is an electrically assisted bicycle, an electric motorcycle or an electric vehicle.

[0457] Thus, the vehicle has a relatively wide range of applications.

[0458] More precisely, in some embodiments, the vehicle is an electrically assisted bicycle. The assistance unit 100 can be installed on a frame, the power input shaft 14 is connected to a crank, and the power output shaft 12 is connected to a rear wheel of the electrically assisted bicycle. In fixed-gear mode, the assistance power device 18 is able to rotate the speed control power device 16 via the differential gear mechanism 24 in order to mitigate or eliminate a soft pedal feel when pressing a pedal, which is caused by insufficient power output from the speed control power device 16. In gear-shift mode, the speed control power device 16 can regulate the speed of the power output shaft 12, thereby realizing a continuously variable transmission to mitigate or eliminate a jerky feeling during gear changes.

[0459] In some embodiments, the vehicle is an electric motorcycle. The assistance unit 100 can be installed on a frame, the power input shaft 14 is connected to an output shaft of an electric motor, and the power output shaft 12 is connected to a rear wheel of the electric motorcycle. In fixed-gear mode, the assistance power device 18 is able to rotate the speed control power device 16 via the differential gear mechanism 24 to mitigate or eliminate a spongy pedal feel when pressing an accelerator pedal, which is caused by insufficient power output from the speed control power device 16. In gear-shift mode, the speed control power device 16 can regulate the speed of the power output shaft 12, thereby realizing a continuously variable transmission to mitigate or eliminate a jerky feeling during gear changes.

[0460] In some embodiments, the vehicle is an electric vehicle. The assistance unit 100 can be installed on a vehicle body; the power input shaft 14 is connected to an output shaft of a vehicle drive motor, and the power output shaft 12 is connected to a drive wheel of the electric vehicle (such as a rear wheel and / or a front wheel, or the like). In fixed-gear mode, the assistance power device 18 is able to rotate the speed control power device 16 via the differential gear mechanism 24 in order to mitigate or eliminate a soft pedal feel when pressing an accelerator pedal, which is caused by insufficient power output from the speed control power device 16.In gear shift mode, the speed control power device 16 can regulate the speed of the power output shaft 12, thereby realizing a continuously operating transmission to mitigate or eliminate any jerking sensation during gear changes.

[0461] In a second aspect, embodiments of the present disclosure provide a vehicle.

[0462] We are now also turning Fig. 7 to, where the vehicle has 10 embodiments of the present disclosure: a power input device 200; and the support unit 100 according to one of the above embodiments, which is connected to the power input device 200 and is configured to control a power input from the power input device 200.

[0463] It should be noted that the vehicle can be a mobile land device, for example, a car, an electrically assisted bicycle, an electric motorcycle, or the like. The vehicle can also be a mobile water device, for example, a personal watercraft, a speedboat, or the like. The vehicle can also be a mobile aircraft, for example, an unmanned aerial vehicle or the like, a manned aircraft or the like. The vehicle can also be a mobile underwater device, for example, an unmanned underwater vehicle or the like.

[0464] In some embodiments, the vehicle 10 further comprises a propulsion device 300. The propulsion device 300 is driven by the power output shaft 12 of the support unit 100. The power output shaft 12 of the support unit 100 rotates a power delivery component of the propulsion device 300, thereby setting the vehicle in motion. For example, the propulsion device 300 can be a wheel, a propeller, or the like.

[0465] It should be noted that the above explanations of embodiments and advantageous effects of the support unit 100 also apply to the vehicle of the present embodiment. To avoid repetition, details are not discussed here.

[0466] In the description of the disclosure, descriptions using terms such as "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples" indicate that specific features, structures, materials, or properties described in connection with the embodiments or examples are included in at least one embodiment or example of the present disclosure. In the specification, schematic representations of the aforementioned terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or properties may be combined in a suitable manner in one or more embodiments or examples.

[0467] Although embodiments of the present disclosure have been shown and described, it is clear to the person skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and essence of the present disclosure. The scope of protection of the present application is defined by the claims and their equivalents.

Claims

A support unit for an electrically assisted bicycle, comprising: a power output shaft configured to deliver power; a power input shaft configured to receive input power from a pedal crank mechanism and to transmit the power to the power output shaft; a speed control power device connected to the power output shaft via a first gear mechanism and configured to regulate the speed of the power output shaft; and an assistance power device connected to the first gear mechanism via a second gear mechanism and configured to provide assistance power to the power output shaft; wherein the power input shaft and the power output shaft are arranged at a distance from each other in a direction perpendicular to the power output shaft, and the power input shaft extends substantially parallel to a direction of extension of the power output shaft. Support unit according to claim 1, wherein the second transmission mechanism rotates a component of the first transmission mechanism via a fourth transmission mechanism, the fourth transmission mechanism comprising a gear transmission mechanism, and the second transmission mechanism comprising a gear transmission mechanism having several gear elements, wherein an output shaft of the support power device is connected to a gear element and the first transmission mechanism is connected to another gear element. Support unit according to claim 1, wherein the first transmission mechanism comprises a gear transmission mechanism having several gear elements, wherein an output shaft of the speed control power device is connected to a gear element and the power output shaft is connected to another gear element. Support unit according to claim 3, wherein the gear mechanism comprises a planetary gear mechanism having a sun gear, a ring gear, a planet gear set and a planet carrier, wherein the sun gear is arranged inside the ring gear, wherein the planet gear set is arranged between an inner ring of the ring gear and an outer ring of the sun gear and is toothed with both the ring gear and the sun gear, and wherein the planet carrier is connected to a central section of planet gears of the planet gear set. Support unit according to claim 4, wherein an output shaft of the speed control power device is connected to the sun gear or the planet carrier, or the power output shaft is connected to the planet carrier or the sun gear. Support unit according to claim 4, wherein the toothed ring is connected to the power input shaft via a third gear mechanism. A support unit according to claim 6, wherein one of the sun gear and the planet carrier is connected to the output shaft of the speed control power device and the other is connected to the power output shaft, the support power device comprising an assist motor; wherein, when the assist motor is operating, it can set the second gear mechanism in motion, thereby causing a component of the fourth gear mechanism and the ring gear to rotate; when the ring gear rotates, it can cause the first planet gear set to rotate, thereby causing the planet carrier and the power output shaft to rotate, thus realizing that the support power device provides assist power to the power output shaft. Support unit according to claim 1, further comprising: a third gear mechanism, wherein the power input shaft rotates a component of the first gear mechanism via the third gear mechanism. Support unit according to claim 8, wherein the third transmission mechanism comprises a mechanical transmission mechanism. Support unit according to claim 1, further comprising: a coupling, wherein the power input shaft rotates a component of the first transmission mechanism via the third transmission mechanism and the coupling is configured to disconnect or establish a power transmission connection by which the power input shaft rotates a component of the first transmission mechanism via the third transmission mechanism, wherein the coupling preferably comprises a one-way bearing. Support unit according to claim 10, wherein the one-way bearing is connected to the power input shaft and the third gear mechanism is connected to the power input shaft via the one-way bearing. Support unit according to claim 10, wherein, if a rotational speed of the third gear mechanism is greater than a rotational speed of the power input shaft, the one-way bearing disconnects the power transmission connection through which the power input shaft rotates a component of the first gear mechanism via the third gear mechanism. Support unit according to claim 1, wherein the support power device is connected to the speed control power device via a compensating gear mechanism, wherein, when an associated information about a power to be delivered by the speed control power device exceeds a preset threshold, the support power device sets the speed control power device in rotation via the compensating gear mechanism. An electrically assisted bicycle comprising: a pedal crank mechanism; and the support unit according to one of claims 1-13, wherein the support unit is connected to the pedal crank mechanism and is configured to control a power input from the pedal crank mechanism.

Images