Electric bicycle hub motor structure beneficial to sliding

Abstract

The utility model discloses an electric bicycle hub motor structure facilitating sliding. The electric bicycle hub motor structure comprises a motor main shaft, a rotor, a stator and a motor shell. The rotor is fixedly mounted on the main shaft; the stator sleeves the periphery of the rotor and is rotatably mounted on the main shaft; the periphery of the stator is sleeved with the motor shell, and the motor shell is rotationally installed on the main shaft. The device further comprises a one-way clutch component. The one-way clutch component is a component which comprises a one-way clutch driving piece and a one-way clutch driven piece and can only rotate in one direction. The one-way clutch component is connected between the motor shell and the stator through a one-way clutch driving piece and a one-way clutch driven piece of the one-way clutch component, so that a connecting structure capable of rotating relatively in a one-way mode is formed between the motor shell and the stator. The electric bicycle has the advantages that when the motor stops working, the friction coefficient between the wheel and the motor is extremely low, the wheel can continue to rotate freely and inertially, the motor cannot be driven to rotate even if the wheel is driven to rotate by riding, and the sliding time and distance are long.

Description

Technical Field

[0001] The utility model relates to the field of electric bicycles, in particular to a hub motor structure of an electric bicycle which is conducive to sliding. Background Art

[0002] At present, the motors of electric bicycles are generally divided into structures such as direct drive motors and motors with reduction clutch mechanisms.

[0003] like Figure 8 As shown, an electric bicycle wheel with a direct-drive motor, the motor of the wheel includes a motor spindle 11 and a motor housing 12, the motor housing 12 is movably connected to the motor spindle 11 through a bearing, and can rotate around the motor spindle 11; a stator 14 (with a coil wound around its inner wall) is fixedly connected to the motor spindle 11, a rotor 13 (with a magnet mounted on its outer periphery) is sleeved inside the stator 14, the rotor 13 can drive the motor housing 12 to rotate relative to the stator 14, and the wheel rim 2 is fixedly connected to the motor housing 12 through a connecting rod 21.

[0004] When the motor of the electric bicycle is working, the motor housing 12 rotates around the motor main shaft 11, thereby driving the wheel rim 2 to roll forward and make the bicycle move forward. When the electric bicycle is in a gliding state with the motor not working, due to inertia, the motor housing 12 continues to rotate relative to the motor main shaft 11, and the wheel rim 2 can freely rotate forward. Due to the large sliding contact friction and collision between the motor housing 12 and the motor main shaft 11, especially during free gliding, a large magnetic resistance will be generated between the rotor 13 and the stator 14, resulting in a large resistance during gliding, causing the electric bicycle to stop gliding after about a few seconds, which is much shorter than the gliding time of ordinary bicycles. Not only is the gliding distance short, but it is also laborious to ride manually, and it does not save electricity, and basically loses the convenience brought by the bicycle's gliding.

[0005] like Fig. 9 As shown, an electric bicycle wheel with a motor having a speed reduction clutch mechanism comprises a motor main shaft 11, a motor housing 12, a rotor 13 and a stator 14. The motor main shaft 11 comprises a motor first main shaft 113 and a motor second main shaft 111 coaxial with the motor first main shaft 113. The motor housing 12 comprises a second motor housing 121 and a first motor housing 122 connected to each other, and the rotor 13 and the stator 14 are located in a cavity surrounded by the motor housing 12.

[0006] The rotor 13 (with magnets mounted on its periphery) is fixedly connected to the rotating shaft 1, and a stator 14 (with a coil wound on its inner wall) is sleeved on the periphery of the rotor 13. One end of the stator 14 is fixedly connected to the stator cover 15, and the other end is provided with a stator side plate 142 for installation. The outer side of the stator cover 15 is fixedly connected to the first main shaft 113 of the motor, and the first motor housing 122 sleeves the stator 14 therein, which can rotate around the first main shaft 113 of the motor through a bearing.

[0007] The rotating shaft 1 is movably connected to the stator side plate 142 and the stator cover plate 15 through a bearing, and a sun gear 141 is provided on the outer side of the stator side plate 142 at one end thereof (i.e., the sun gear 141 is provided on the rotating shaft 1 at one end away from the stator cover plate 15), and the sun gear 141 is connected to the inner gear ring 17 through three planetary gears 16 (the planetary gears 16 are double gears), and the three planetary gears 16 are movably sleeved on three fixed shafts 161, and one end of the fixed shaft 161 is connected to the stator side plate 142, and the other end thereof is connected to the large end surface 112 of the second main shaft 111 of the motor. The large end surface 112 is connected to a plurality of protrusions 143 provided on the side of the stator side plate 142 away from the stator cover plate 15, thereby connecting the second main shaft 111 of the motor with the stator 14.

[0008] An inner boss 171 is provided in the inner gear ring 17, and the diameter of the inner boss 171 is smaller than the inner tooth top diameter of the inner gear ring 17. The inner gear ring 17 is located in the second motor housing 121, and is sleeved on the second main shaft 111 of the motor through a bearing sleeve. The second main shaft 111, the first main shaft 113 of the motor and the rotating shaft 1 are coaxial, that is, the motor housing 12 can rotate around the second main shaft 111 of the motor and the first main shaft 113 of the motor, that is, the motor housing 12 can rotate around the motor main shaft 11.

[0009] A clutch plate 18 is provided at the position of the inner boss 171 of the inner gear ring 17 in the second motor housing 121. The outer diameter of the clutch plate 18 matches the inner diameter of the inner boss 171. The clutch plate 18 is provided with a groove in which a roller and a spring (not shown in the figure) are installed. The clutch plate 18, the roller and the spring cooperate with the inner boss 171 to form an overrunning clutch, ensuring that the clutch plate 18 and the inner gear ring 17 can only rotate in one direction.

[0010] The wheel rim 2 is fixedly connected to the outer periphery of the motor housing 12 via a connecting rod (including connecting parts in the form of connecting blocks, etc.) 21, so that when the first main shaft 113 of the motor and the second main shaft 111 of the motor do not rotate (the first main shaft 113 of the motor and the second main shaft 111 of the motor are fixedly installed on the frame), the motor can drive the wheel rim 2 to rotate in one direction.

[0011] The one-way transmission principle is as follows: since the first main shaft 113 and the second main shaft 111 of the motor are respectively fixed on the stator side plate 142 and the stator cover plate 15, the first main shaft 113 and the second main shaft 111 of the motor are indirectly fixed on the stator 4. When the coil of the stator 14 is energized, the rotor 13 drives the rotating shaft 1 to rotate relative to the stator 14, the sun gear 141 of the rotating shaft 1 drives the inner gear ring 17 to rotate through the planetary gear 16, the inner gear ring 17 drives the motor housing to rotate through the inner boss 171, the clutch plate 18, the roller, and the spring, and the motor housing 12 drives the wheel rim 2 to roll through the connecting rod 21.

[0012] When the motor of the electric bicycle is working, the roller is stuck between the inner surface of the inner boss 171 and the outer surface of the clutch plate 18, ensuring that the inner gear ring 17 and the clutch plate 18 rotate together. At this time, the motor housing drives the wheel rim 2 to rotate, allowing the vehicle to move forward; when the electric bicycle goes downhill or due to inertia, the motor stops working, and the roller disengages from the position between the inner surface of the inner boss 171 and the outer surface of the clutch plate 18. At this time, the inner gear ring 17 and the clutch plate 18 are in a separated state, and the wheel rim 2 can rotate forward freely, that is, the electric bicycle can slide forward by itself under the action of downhill force or inertia.

[0013] However, practice has shown that when the electric bicycle is in a gliding state with the motor not working, there is a large sliding contact friction, collision and other factors between the outer ring (inner gear ring 17) and the inner ring (clutch plate 18 and other components) of the overrunning clutch, resulting in a large resistance when gliding on a slope, and even driving the motor to produce a certain passive rotation and generate electromagnetic resistance, causing the electric bicycle to stop gliding after about several seconds, which is much shorter than the gliding time of ordinary bicycles. Practice has shown that under the same gliding external conditions, the gliding distance of this electric bicycle is not one-tenth of the gliding distance of an ordinary human-powered bicycle. This electric bicycle with a motor with a reduction clutch mechanism is still not conducive to gliding, does not save manpower or electricity, and is difficult to achieve human-powered riding function. Utility Model Content

[0014] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide an electric bicycle hub motor structure that is conducive to sliding, aiming to solve the problem that the electric bicycle has less time and shorter sliding distance when sliding downhill or inertial sliding.

[0015] The technical solution of the utility model is: an electric bicycle hub motor structure that is conducive to sliding, which includes a motor main shaft, a rotor, a stator and a motor shell; the motor shell is sleeved on the outer periphery of the stator and rotatably installed on the motor main shaft; the stator is fixedly connected to the motor main shaft and sleeved on the outer periphery of the rotor, and the rotor can rotate relative to the stator (14);

[0016] It also includes a one-way clutch component;

[0017] The one-way clutch component is a component that can only rotate in one direction and includes a one-way clutch active component and a one-way clutch driven component; the one-way clutch component is connected between the motor housing and the rotor through its one-way clutch active component and the one-way clutch driven component, so that a connection structure that can rotate relatively in one direction is formed between the motor housing and the rotor.

[0018] A further technical solution of the utility model is: the motor main shaft comprises a first motor main shaft and a second motor main shaft coaxial with the first motor main shaft; the motor housing comprises a second motor housing and a first motor housing connected to each other;

[0019] The rotor is fixedly connected to the rotating shaft, a stator is sleeved on the outer periphery of the rotor, one end of the stator is fixedly connected to the stator cover plate, and the other end is provided with a stator side plate for installation, the outer side of the stator cover plate is fixedly connected to the first main shaft of the motor, and the first motor housing is rotatably installed on the first main shaft of the motor;

[0020] The stator side plate is provided with a plurality of protrusions on one side away from the stator cover plate, one end of the second main shaft of the motor is provided with a large end surface, the large end surface is connected to the protrusions, and the second motor housing is rotatably mounted on the second main shaft of the motor;

[0021] The rotating shaft is movably connected to the stator side plate and the stator cover plate through a bearing, and the end of the rotating shaft away from the stator cover plate is connected to the sun gear, and the sun gear is connected to the inner gear ring through three planetary gears. The end of the inner gear ring away from the stator is provided with a circumferential full-circle inner boss, and the diameter of the inner boss is smaller than the inner tooth top diameter of the inner gear ring; the three planetary gears are movably sleeved on three fixed shafts respectively, one end of the fixed shaft is connected to the stator side plate, and the other end is connected to the large end face of the second main shaft of the motor;

[0022] The second motor housing is connected to the inner boss of the inner gear ring through a one-way clutch component.

[0023] The technical solution of the utility model is: the one-way clutch component is a one-way bearing, which comprises a bearing outer ring and a bearing inner ring; the bearing inner ring is connected to the second motor housing, and the bearing outer ring is connected to the inner boss.

[0024] The technical solution of the utility model is: the one-way clutch component is a ratchet mechanism, which includes a movable ratchet ring, a fixed ratchet ring and a ratchet spring; the movable ratchet ring is integrally stepped and slidably sleeved on the second main shaft of the motor, and a plurality of axial grooves are provided on the outer periphery of the small step.

[0025] The inner boss is sleeved on the small step of the movable ratchet ring, and is provided with a plurality of axial protrusions matching the plurality of axial grooves, and the axial protrusions are located in the axial grooves; the end face of the movable ratchet ring away from the axial groove is provided with radial ratchet teeth, and a ratchet spring is sleeved on the small step between the movable ratchet ring and the inner boss; the fixed ratchet ring is connected to the second motor housing, and its end face away from the second motor housing is provided with first radial ratchet teeth matching the radial ratchet teeth.

[0026] The technical solution of the utility model is: it also includes an overrunning clutch, which includes a clutch plate, a roller and a spring; the clutch plate is connected to the position of the inner boss of the inner gear ring corresponding to the outer ring of the bearing, and the outer diameter of the clutch plate matches the inner diameter of the inner boss; the clutch plate is provided with a groove, and the roller and the spring are installed in the groove, and the clutch plate, the roller and the spring cooperate with the inner boss to form an overrunning clutch, ensuring that the clutch plate and the inner gear ring can only rotate in one direction.

[0027] The technical solution of the utility model is: an overrunning clutch is arranged between the inner boss and the small step of the movable ratchet ring, and the overrunning clutch comprises a clutch plate, a roller and a spring;

[0028] The clutch plate is annular as a whole, and its outer diameter matches the inner diameter of the inner boss; the clutch plate is provided with a groove, in which a roller and a spring are installed, and the clutch plate, the roller and the spring cooperate with the inner boss to form an overrunning clutch, ensuring that the clutch plate and the inner gear ring can only rotate in one direction;

[0029] The inner hole of the clutch plate is sleeved on the small step of the movable ratchet ring, and is provided with a plurality of axial protrusions matching the plurality of axial grooves, and the axial protrusions are located in the axial grooves; the end surface of the movable ratchet ring away from the axial groove is provided with radial ratchet teeth, and a ratchet spring is sleeved on the small step between the movable ratchet ring and the inner boss; the fixed ratchet ring is connected to the second motor housing, and its end surface away from the second motor housing is provided with first radial ratchet teeth matching the radial ratchet teeth.

[0030] The technical solution of the utility model is: the one-way clutch component is a ratchet pawl structure, the ratchet pawl structure includes a ratchet, a shaft ring and a pawl, the ratchet is connected to the inner boss, and an inner ratchet is provided on the side close to the inner boss, the shaft ring is connected to the second motor housing, and a movably mounted pawl is installed at a position corresponding to the shaft ring and the inner ratchet, and the pawl is pressed on the inner ratchet through a spring sheet.

[0031] Compared with the prior art, the utility model has the following characteristics:

[0032] 1. The utility model can provide a primary one-way clutch (i.e., a ratchet pawl structure or a ratchet mechanism or a one-way bearing) connection for the hub motor of an electric bicycle without a sliding mechanism, which is beneficial for the electric bicycle to slide downhill or coast by inertia, so that the electric bicycle can slide downhill or coast by inertia for a long time and a long distance, and at the same time, human riding is as easy as an ordinary bicycle.

[0033] 2. Since the utility model can also be connected with a first-stage one-way clutch for the existing motor, it is set to use a two-stage one-way clutch structure connected in series between the motor housing and the motor main shaft. When the electric bicycle is in a downhill sliding state, due to the large sliding contact friction and collision between the outer ring and the inner ring of the first-stage one-way clutch (i.e., the overrunning clutch connected inside the motor), the resistance is large, and it will drive the motor to passively rotate to generate electromagnetic resistance, so that the sliding time is reduced; since the second-stage one-way clutch structure of the utility model (i.e., the ratchet pawl structure or the ratchet mechanism or the one-way bearing) is arranged between one side of the motor housing and the overrunning clutch, the second-stage one-way clutch structure drives the wheel rim to slide, that is, when the bicycle is sliding, the two-stage one-way clutch structure may slide at the same time, or one of the first-stage one-way clutch structures may slide, thereby solving the problem of short downhill sliding time and short sliding distance of the electric bicycle, so that the downhill sliding or inertial sliding time of the electric bicycle is long and the sliding distance is long. The purpose of saving time, labor, electricity, energy saving and low-carbon travel is achieved.

[0034] The detailed structure of the present utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0037] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0038] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a schematic diagram of the structure of Example 1 of the utility model;

[0041] Figure 2 This is a schematic diagram of the structure of Example 2 of the present utility model;

[0042] Figure 3 This is a schematic diagram of the structure of Embodiment 3 of the present utility model;

[0043] Figure 4 for Figure 3 A magnified view of part I;

[0044] Figure 5 This is a schematic diagram of the structure of the use state of Example 3 of the utility model;

[0045] Figure 6 This is a schematic diagram of the structure of Example 4 of the utility model

[0046] Figure 7 This is a schematic diagram of the structure of Example 5 of the present utility model;

[0047] Figure 8 It is a schematic diagram of the prior art;

[0048] Fig. 9 It is a schematic diagram of the prior art 2. DETAILED DESCRIPTION

[0049] Example 1

[0050] like Figure 1As shown, an electric bicycle hub motor structure that is conducive to gliding includes a motor main shaft 11, a rotor 13, a stator 14 and a motor housing 12; the motor main shaft 11 includes a motor first main shaft 113 and a motor second main shaft 111 coaxial with the motor first main shaft 113; the motor housing 12 includes a second motor housing 121 and a first motor housing 122 that are interconnected.

[0051] The rotor 13 is fixedly connected to the rotating shaft 1, and a stator 14 is sleeved on the outer periphery of the rotor 13. One end of the stator 14 is fixedly connected to the stator cover 15, and the other end is provided with a stator side plate 142 for installation. The outer side of the stator cover 15 is fixedly connected to the first main shaft 113 of the motor. The first motor housing 122 sleeves the stator 14 therein, and can be movably connected to the first main shaft 113 of the motor through a bearing 101.

[0052] The stator side plate 142 is provided with a plurality of protrusions 143 on one side away from the stator cover plate 15. Preferably, there are three protrusions 143 (two of which are not shown in the figure) evenly distributed. A large end surface 112 is provided at one end of the second main shaft 111 of the motor, and the large end surface 112 is connected to the protrusions 143. The second motor housing 121 is rotatably mounted on the second main shaft 111 of the motor, that is, the second main shaft 111 of the motor is fixed to the stator side plate 142, that is, the second main shaft 111 of the motor is fixed to the stator 14. At the same time, an axial space is provided between the large end surface 112 and the outer side of the stator side plate 142 through the protrusion 143, and the second motor housing 121 is rotatably mounted on the second main shaft 111 of the motor through the bearing B103.

[0053] The rotating shaft 1 is connected to the stator side plate 142 and the stator cover plate 15 through the bearing D104 and the bearing E105 respectively, that is, the rotating shaft 1 is coaxially arranged with the first motor main shaft 13 and the second motor main shaft 111 .

[0054] The end of the rotating shaft 1 away from the stator cover plate 15 is connected to the sun gear 141, and the sun gear 141 is connected to the inner ring gear 17 through three planetary gears 16. Preferably, the planetary gears 16 are double gears, and the three planetary gears 16 are movably mounted on three fixed shafts 161 respectively. One end of the fixed shaft 161 is connected to the stator side plate 142, and the other end thereof is connected to the large end surface 112 of the second main shaft 111 of the motor, that is, the three planetary gears 16 are located in the axial space between the large end surface 112 and the outer side of the stator side plate 142.

[0055] The second motor housing 121 is connected to the inner boss 171 of the inner gear ring 17 via a one-way clutch component, and the one-way clutch component is a component that can only rotate in one direction and includes a one-way clutch inner ring and a one-way clutch outer ring. Preferably, the one-way clutch component is a one-way clutch or a one-way bearing. In this embodiment, the one-way clutch component is a one-way bearing, which includes a bearing outer ring 31 and a bearing inner ring 32; the bearing outer ring 31 is connected to the inner boss 171, and the bearing inner ring 32 is fixedly connected to the second motor housing 121 by a connecting member or a connecting block, preferably, connected by bolts 33, which facilitates the replacement or maintenance of the one-way clutch component. Of course, the bearing outer ring 31 and the inner boss 171 can also be an integrated structure, so that the combination of the two is more firm, reliable and durable.

[0056] The connection relationship between the bearing outer ring 31, the bearing inner ring 32, the inner boss 171, and the second motor housing 121 can be completely reversed, that is, the bearing outer ring 31 is connected to the second motor housing 121, and the bearing inner ring 32 is connected to the inner boss 171, and the one-way rotation direction is also adjusted accordingly. This is a simple equivalent technology replacement or easy conversion, and it is completely within the protection scope of this patent.

[0057] The working principle of the utility model is as follows: when the motor of the electric bicycle is working, the stator 14 and the motor shaft 11 are fixed, and the rotor 13 rotates under the action of magnetic force, thereby rotating the sun gear 141, and the sun gear 141 rotates through three planetary gears 16 (the three planetary gears 16 rotate around the fixed shaft 161, and the fixed shaft 161 is fixed between the stator side plate 142 and the large end surface 112 of the second main shaft 111 of the motor, so that the three planetary gears 16 can only rotate but not revolve) to make the inner gear ring 17 rotate in the opposite direction, because the inner boss 171 of the inner gear ring 17 is connected to the bearing outer ring 31 of the one-way bearing, and the bearing inner ring 32 is connected to the second motor housing 121, so that the rotor 13 drives the second motor housing 121 to rotate around the second main shaft 111 of the motor, that is, the motor housing 12 rotates around the motor main shaft 11, so that the bicycle moves forward.

[0058] When the electric bicycle glides downhill, the motor stops working and the motor housing 12 rotates around the motor main shaft 11. Since the friction resistance of the one-way bearing is much smaller than the friction resistance of the overrunning clutch inside the motor, the stator 14 and the rotor 13 of the motor are in a stationary state, and the motor housing 12 drives the wheels to glide freely. In this way, the electric bicycle can glide for a long time when going downhill, which is consistent with the downhill glide time and distance of an ordinary bicycle. At the same time, human riding is easy and the bicycle riding function is perfectly maintained.

[0059] Example 2

[0060] like Figure 2As shown, an electric bicycle hub motor structure that is conducive to sliding includes a motor main shaft 11, a rotor 13, a stator 14 and a motor housing 12. The difference from Example 1 is that an overrunning clutch is provided between the bearing outer ring 31 and the inner boss 171 of the inner gear ring 17.

[0061] The overrunning clutch includes a clutch plate 18, a roller (not shown in the figure) and a spring (not shown in the figure); the inner hole of the inner boss 171 of the inner gear ring 17 corresponding to the outer ring 31 of the bearing is connected with the clutch plate 18, and the outer diameter of the clutch plate 18 matches the inner diameter of the inner boss 171; the clutch plate 18 is provided with a groove, and the groove is equipped with a roller and a spring. The clutch plate 18, the roller and the spring cooperate with the inner boss 171 to form an overrunning clutch, ensuring that the clutch plate 18 and the inner gear ring 17 can only rotate in one direction, that is, an overrunning clutch is provided between the one-way bearing and the inner gear ring 17.

[0062] When the motor is working, the stator 14 and the motor shaft 11 are fixed, and the rotor 13 rotates under the action of magnetic force, thereby rotating the sun gear 141. The sun gear 141 rotates the inner ring gear 17 in the opposite direction through the three planetary gears 16. Since the inner boss 171 of the inner ring gear 17 forms a clutch structure with the clutch plate 18, the inner ring gear 17 drives the clutch plate 18 to rotate together, that is, the inner ring gear 17 drives the second motor housing 121 to rotate around the second main shaft 111 of the motor, that is, the motor housing 12 rotates around the motor main shaft 11 through the one-way bearing and the overrunning clutch.

[0063] When the electric bicycle is sliding downhill, the motor stops working, and the wheel drives the motor housing 12 to rotate around the motor main shaft 11 under the action of inertia. In this way, since the friction resistance of the one-way bearing is much smaller than the friction resistance of the overrunning clutch and the planetary gear system inside the motor, the stator 14 and the rotor 13 of the motor are in a stationary state, and the motor housing 12 slides freely under the drive of the wheel. During the sliding process, a one-way bearing and an overrunning clutch are arranged between the bosses 171 in the motor housing 12, forming a two-stage one-way clutch structure in series and in the same direction. In this way, when sliding, as long as any one-stage one-way clutch structure can rotate smoothly, it will be conducive to the sliding of the electric bicycle, which completely changes the traditional electric bicycle that has no one-way wheel structure that can slide or has only one-stage one-way wheel structure that is conducive to sliding.

[0064] Example 3

[0065] like Figure 3-5 As shown, an electric bicycle hub motor structure that is conducive to sliding includes a motor main shaft 11, a rotor 13, a stator 14 and a motor housing 12. The difference from Example 1 is that the second motor housing 121 is connected to the inner boss 171 of the inner gear ring 17 through a one-way clutch component, and the one-way clutch component is a ratchet mechanism.

[0066] The ratchet mechanism includes a movable ratchet ring 61, a fixed ratchet ring 62 and a ratchet spring 63; the movable ratchet ring 61 is overall stepped (i.e., has at least two coaxial steps of different sizes) and is slidably mounted on the second main shaft 111 of the motor, and a plurality of axial grooves 611 are provided on the outer periphery of the small step.

[0067] The inner hole of the inner boss 171 is sleeved on the small step of the movable ratchet ring 61, and is provided with a plurality of axial protrusions 172 matching the plurality of axial grooves 611, and the axial protrusions 172 are located in the axial grooves 611; that is, the movable ratchet ring 61 can move axially relative to the second main shaft 111 of the motor, and at the same time, the inner boss 171 can drive the movable ratchet ring 61 to rotate around the second main shaft 111 of the motor. Preferably, the axial protrusions 172 and the axial grooves 611 are spline sleeves and spline shafts that match each other.

[0068] The end surface of the movable ratchet ring 61 away from the axial groove 611 is provided with radial ratchet teeth 612, and a ratchet spring 63 is sleeved on the small step between the movable ratchet ring 61 and the inner boss 171, that is, the ratchet spring 63 presses the movable ratchet ring 61 toward the fixed ratchet ring 62. The fixed ratchet ring 62 is connected to the second motor housing 121, and the end surface thereof away from the second motor housing 121 is provided with first radial ratchet teeth 621 matching the radial ratchet teeth 612, that is, the movable ratchet ring 61 can drive the fixed ratchet ring 62 to rotate through the radial ratchet teeth 612 and the first radial ratchet teeth 621, thereby driving the motor housing 12 to rotate.

[0069] The connection relationship between the ratchet mechanism and the second motor housing 121 and the inner gear ring 17 can be completely reversed, that is, the movable ratchet ring 61 and the ratchet spring 63 are connected to the second motor housing 121, and the fixed ratchet ring 62 is connected to the inner gear ring 17, and the unidirectional rotation direction is also adjusted accordingly. This is a simple equivalent technical replacement or easy conversion, and it is completely within the protection scope of this patent.

[0070] The working principle of this embodiment is: when the motor of the electric bicycle is working, the stator 14 and the motor main shaft 11 are fixed, and the rotor 13 rotates under the action of magnetic force, thereby rotating the sun gear 141, and the sun gear 141 rotates the inner ring gear 17 in the opposite direction through the three planetary gears 16. The inner boss 171 of the inner ring gear 17 drives the movable ratchet ring 61 to rotate through the axial protrusion 172 and the axial groove 611. Under the action of the ratchet spring 63, the movable ratchet ring 61 can drive the fixed ratchet ring 62 to rotate through the radial ratchet teeth 612 and the first radial ratchet teeth 621, thereby driving the second motor housing 121 to rotate, that is, driving the motor housing 12 to rotate, so as to make the bicycle move forward.

[0071] When the electric bicycle is in a gliding state with the motor not working, the inertia of the wheel causes the second motor housing 121 to drive the first radial ratchet teeth 621 of the fixed ratchet ring 62 to disengage the radial ratchet teeth 612, that is, the ratchet mechanism is in a disengaged state. Figure 5 As shown, the second motor housing 121 continues to rotate relative to the second main shaft 111 of the motor, that is, the motor housing 12 rotates relative to the motor main shaft 11. Since the friction resistance of the ratchet mechanism is much smaller than the various resistances inside the motor (friction resistance and magnetic resistance of the planetary gear train, etc.), the stator 14 and the rotor 13 are basically in a stationary state, and only the motor housing 12 rotates. In this way, the gliding time of the electric bicycle when going downhill will be greatly extended, which is roughly the same as the gliding time and distance of ordinary bicycles downhill, and much longer than the gliding distance of traditional electric bicycles, which saves manpower and electricity and perfectly maintains the gliding function of the bicycle.

[0072] Example 4

[0073] like Figure 6 As shown, an electric bicycle hub motor structure that is conducive to sliding includes a motor spindle 11, a rotor 13, a stator 14 and a motor housing 12. The difference from Example 3 is that an overrunning clutch is provided between the inner boss 171 and the small step of the movable ratchet ring 61, and the overrunning clutch includes a clutch plate 18, a roller and a spring.

[0074] The clutch plate 18 is annular as a whole, and its outer diameter matches the inner diameter of the inner boss 171 (note that the inner boss 171 at this time does not have the axial protrusion 172); the clutch plate 18 is provided with a groove, in which a roller and a spring are installed. The clutch plate 18, the roller and the spring cooperate with the inner boss 171 to form an overrunning clutch, ensuring that the clutch plate 18 and the inner gear ring 17 can only rotate in one direction.

[0075] The inner hole of the clutch plate 18 is sleeved on the small step of the movable ratchet ring 61, and is provided with a plurality of axial protrusions 181 matching the plurality of axial grooves 611. The axial protrusions 181 are located in the axial grooves 611, that is, the movable ratchet ring 61 can move axially relative to the second main shaft 111 of the motor, and the clutch plate 18 can drive the movable ratchet ring 61 to rotate. Preferably, the protrusions 181 and the axial grooves 611 are spline sleeves and spline shafts that match each other.

[0076] The end surface of the movable ratchet ring 61 away from the axial groove 611 is provided with radial ratchet teeth 612, and a ratchet spring 63 is sleeved on the small step between the movable ratchet ring 61 and the inner boss 171, that is, the ratchet spring 63 presses the movable ratchet ring 61 toward the fixed ratchet ring 62. The fixed ratchet ring 62 is connected to the second motor housing 121, and the end surface thereof away from the second motor housing 121 is provided with a first radial ratchet tooth 621 matching the radial ratchet tooth 612, that is, the movable ratchet ring 61 can drive the fixed ratchet ring 62 to rotate through the radial ratchet teeth 612 and the first radial ratchet teeth 621, thereby driving the second motor housing 121 to rotate, thereby driving the motor housing 12 to rotate.

[0077] The connection relationship between the ratchet mechanism, the clutch plate 18, and the second motor housing 121 can be completely reversed, that is, the movable ratchet ring 61 and the ratchet spring 63 are connected to the second motor housing 121, and the fixed ratchet ring 62 is connected to the clutch plate 18, and the unidirectional rotation direction is also adjusted accordingly. This is a simple equivalent technical replacement or easy conversion, and it is completely within the protection scope of this patent.

[0078] When the motor of the electric bicycle is working, the stator 14 and the motor shaft 11 are fixed, and the rotor 13 rotates under the action of magnetic force, thereby rotating the sun gear 141. The sun gear 141 rotates the inner ring gear 17 in the opposite direction through the three planetary gears 16. The inner boss 171 of the inner ring gear 17 forms a clutch structure with the clutch plate 18. The inner ring gear 17 drives the clutch plate 18 to rotate together. The clutch plate 18 drives the movable ratchet ring 61 to rotate through the axial protrusion 181 and the axial groove 611. Under the action of the ratchet spring 63, the movable ratchet ring 61 can drive the fixed ratchet ring 62 to rotate through the radial ratchet teeth 612 and the first radial ratchet teeth 621, thereby driving the second motor housing 121 to rotate, that is, driving the motor housing 12 to rotate, so that the bicycle moves forward.

[0079] When the electric bicycle is in a gliding state with the motor not working, due to the inertia of the wheel, the second motor housing 121 drives the first radial ratchet teeth 621 of the fixed ratchet ring 62 to disengage the radial ratchet teeth 612, that is, the ratchet mechanism is in a disengaged state (not shown in the figure, refer to Figure 5 As shown in the figure), the second motor housing 121 continues to rotate relative to the second main shaft 111 of the motor, that is, the motor housing 12 rotates relative to the main shaft 11 of the motor. Since the friction resistance of the ratchet mechanism is much smaller than the friction resistance and magnetic resistance of the overrunning clutch and the planetary gear train inside the motor, the stator 14 and the rotor 13 are basically in a stationary state, and only the motor housing 12 drives the wheels to slide freely. In this way, the sliding time of the electric bicycle when going downhill will be greatly extended, which is roughly the same as the sliding time and distance of ordinary bicycles downhill, and much longer than the sliding distance of traditional electric bicycles, which saves manpower and electricity and perfectly maintains the sliding function of the bicycle.

[0080] In fact, the ratchet mechanism, the overrunning clutch provided between the second motor housing 121 and the second main shaft 111 of the motor forms a two-stage one-way clutch structure (i.e., the ratchet mechanism and the overrunning clutch) connected in series between the second motor housing 121 and the second main shaft 111 of the motor. When gliding, as long as any stage of the one-way clutch structure can rotate smoothly, it will be beneficial to the gliding of the electric bicycle, which completely changes the traditional electric bicycle that has no one-way clutch structure for gliding or only has one stage of the one-way clutch structure that is conducive to gliding.

[0081] Example 5

[0082] like Figure 7As shown, an electric bicycle hub motor structure that is conducive to sliding includes a motor spindle 11, a rotor 13, a stator 14 and a motor housing 12, which is different from Example 1 in that:

[0083] The second motor housing 121 is connected to the inner boss 171 of the inner gear ring 17 via a one-way clutch component, and the one-way clutch component is a component that can only rotate in one direction and includes a one-way clutch inner ring and a one-way clutch outer ring. Preferably, the one-way clutch component is a ratchet pawl structure, and the ratchet pawl structure includes a ratchet 51, a shaft ring 52 and a pawl 53. The ratchet 51 is connected to the inner boss 171, and an inner ratchet 511 is provided on the side close to the inner boss 171. The shaft ring 52 is connected to the second motor housing 121, and a movably mounted pawl 53 is installed at a position corresponding to the shaft ring 52 and the inner ratchet 511, and the pawl 53 is pressed on the inner ratchet 511 through a spring.

[0084] Its working principle is similar to that of Example 1 and will not be described in detail.

[0085] The present invention is not limited to the above-mentioned specific structure. Any obvious replacement and transformation shall fall within the protection scope of the present invention as long as it does not deviate from the concept of the present technical solution.

Claims

1. A wheel hub motor structure of an electric bicycle that facilitates gliding, comprising a motor main shaft (11), a rotor (13), a stator (14) and a motor housing (12); the motor housing (12) is sleeved on the outer periphery of the stator (14) and is rotatably mounted on the motor main shaft (11); the stator (14) is fixedly connected to the motor main shaft (11) and sleeved on the outer periphery of the rotor (13); the rotor (13) can rotate relative to the stator (14); Its characteristics are: It also includes a one-way clutch component; The one-way clutch component is a component that can only rotate in one direction and includes a one-way clutch active component and a one-way clutch driven component; the one-way clutch component is connected between the motor housing (12) and the rotor (13) via the one-way clutch active component and the one-way clutch driven component, so that a connection structure that can rotate in one direction relative to each other is formed between the motor housing (12) and the rotor (13).

2. The electric bicycle hub motor structure that facilitates gliding according to claim 1 is characterized by: The motor main shaft (11) comprises a first motor main shaft (113) and a second motor main shaft (111) coaxial with the first motor main shaft (113); the motor housing (12) comprises a second motor housing (121) and a first motor housing (122) connected to each other; The rotor (13) is fixedly connected to the rotating shaft (1), a stator (14) is sleeved on the outer circumference of the rotor (13), one end of the stator (14) is fixedly connected to the stator cover (15), and the other end is provided with a stator side plate (142) for installation, the outer side of the stator cover (15) is fixedly connected to the first main shaft (113) of the motor, and the first motor housing (122) is rotatably mounted on the first main shaft (113) of the motor; A plurality of protrusions (143) are provided on a side of the stator side plate (142) away from the stator cover plate (15); a large end surface (112) is provided at one end of the second main shaft (111) of the motor; the large end surface (112) is connected to the protrusions (143); and the second motor housing (121) is rotatably mounted on the second main shaft (111) of the motor; The rotating shaft (1) is movably connected to the stator side plate (142) and the stator cover plate (15) through a bearing, and the end of the rotating shaft (1) away from the stator cover plate (15) is connected to a sun gear (141), and the sun gear (141) is connected to an inner gear ring (17) through three planetary gears (16). The end of the inner gear ring (17) away from the stator (14) is provided with a circumferential full-circle inner boss (171), and the diameter of the inner boss (171) is smaller than the inner tooth top diameter of the inner gear ring (17); the three planetary gears (16) are movably sleeved on three fixed shafts (161), one end of the fixed shaft (161) is connected to the stator side plate (142), and the other end is connected to the large end surface (112) of the second main shaft (111) of the motor; The second motor housing (121) is connected to the inner boss (171) of the inner gear ring (17) via a one-way clutch component.

3. The electric bicycle hub motor structure that facilitates gliding according to claim 2 is characterized by: The one-way clutch component is a one-way bearing, comprising a bearing outer ring (31) and a bearing inner ring (32); the bearing inner ring (32) is connected to the second motor housing (121), and the bearing outer ring (31) is connected to the inner boss (171).

4. The electric bicycle hub motor structure that facilitates gliding according to claim 2 is characterized by: The one-way clutch component is a ratchet mechanism, which comprises a movable ratchet ring (61), a fixed ratchet ring (62) and a ratchet spring (63); the movable ratchet ring (61) is integrally stepped and slidably sleeved on the second main shaft (111) of the motor, and a plurality of axial grooves (611) are provided on the outer periphery of the small step. The inner boss (171) is sleeved on the small step of the movable ratchet ring (61), and is provided with a plurality of axial protrusions (172) matching the plurality of axial grooves (611), and the axial protrusions (172) are located in the axial grooves (611); the end surface of the movable ratchet ring (61) away from the axial grooves (611) is provided with radial ratchet teeth (612), and a ratchet spring (63) is sleeved on the small step between the movable ratchet ring (61) and the inner boss (171); the fixed ratchet ring (62) is connected to the second motor housing (121), and the end surface of the fixed ratchet ring (62) away from the second motor housing (121) is provided with first radial ratchet teeth (621) matching the radial ratchet teeth (612).

5. The electric bicycle hub motor structure that facilitates gliding according to claim 3 is characterized by: The invention also includes an overrunning clutch, which includes a clutch plate (18), a roller and a spring. The clutch plate (18) is connected to the position of the bearing outer ring (31) corresponding to the inner boss (171) of the inner gear ring (17). The outer diameter of the clutch plate (18) matches the inner diameter of the inner boss (171). The clutch plate (18) is provided with a groove, in which a roller and a spring are installed. The clutch plate (18), the roller and the spring cooperate with the inner boss (171) to form an overrunning clutch, so as to ensure that the clutch plate (18) and the inner gear ring (17) can only rotate in one direction.

6. The electric bicycle hub motor structure that facilitates gliding according to claim 4 is characterized by: An overrunning clutch is provided between the inner boss (171) and the small step of the movable ratchet ring (61), and the overrunning clutch comprises a clutch plate (18), a roller and a spring; The clutch plate (18) is annular in shape as a whole, and its outer diameter matches the inner diameter of the inner boss (171); the clutch plate (18) is provided with a groove, in which a roller and a spring are installed; the clutch plate (18), the roller and the spring cooperate with the inner boss (171) to form an overrunning clutch, ensuring that the clutch plate (18) and the inner gear ring (17) can only rotate in one direction; The inner hole of the clutch plate (18) is sleeved on the small step of the movable ratchet ring (61), and a plurality of axial protrusions (181) matching the plurality of axial grooves (611) are provided on the clutch plate, and the axial protrusions (181) are located in the axial grooves (611); the end surface of the movable ratchet ring (61) away from the axial grooves (611) is provided with radial ratchet teeth (612), and a ratchet spring (63) is sleeved on the small step between the movable ratchet ring (61) and the inner boss (171); the fixed ratchet ring (62) is connected to the second motor housing (121), and the end surface of the fixed ratchet ring (62) away from the second motor housing (121) is provided with first radial ratchet teeth (621) matching the radial ratchet teeth (612).

7. The electric bicycle hub motor structure that facilitates gliding according to claim 2 is characterized by: The one-way clutch component is a ratchet-pawl structure, which comprises a ratchet (51), a shaft ring (52) and a pawl (53); the ratchet (51) is connected to the inner boss (171), and an inner ratchet (511) is provided on the side close to the inner boss (171); the shaft ring (52) is connected to the second motor housing (121); a movable pawl (53) is installed at a position corresponding to the shaft ring (52) and the inner ratchet (511); the pawl (53) is pressed onto the inner ratchet (511) via a spring sheet.

Images