Electric bicycle hub motor and wheel structure beneficial to sliding

Abstract

The utility model discloses an electric bicycle hub motor and wheel structure beneficial to sliding. The electric bicycle hub motor and wheel structure comprises a motor and a rim. The motor comprises a motor main shaft and a motor shell, and the motor shell is rotatably mounted on the motor main shaft; the device further comprises a one-way clutch component and a motor mounting box. The motor mounting box comprises a rim shell and a rim shell cover; the motor is mounted in the motor mounting box, and the rim shell and the rim shell cover are rotatably mounted on a motor main shaft; the rim is fixedly connected with a rim shell of the motor mounting box through a connecting piece; the one-way clutch component is connected between the motor shell and the rim shell cover. The electric bicycle has the advantages that when the motor stops working during downhill sliding of the electric bicycle, the friction coefficient between the wheel and the motor is extremely low, the wheel can continuously and freely rotate inertially, and the motor cannot be driven to rotate even if the wheel is driven to rotate during riding, so that the inertia sliding time is long, and the sliding distance is long.

Description

Technical Field

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

[0002] At present, the wheel of an electric bicycle mainly includes a hub motor (hereinafter referred to as the motor) and a wheel rim. The wheel rim is fixedly connected to the motor housing through a connecting rod or a connecting block, and a tire is also mounted on the wheel rim. The motor is mainly divided into several structures such as a direct drive motor and a motor with a reduction clutch mechanism.

[0003] like Figure 6 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 Figure 7 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 one end of the rotating shaft 1 is exposed to the outside of the stator side plate 142 and is provided with a sun gear 141 (that is, 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 respectively 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 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 a position corresponding to 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 a connecting piece in the form of a connecting block, 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 and does not save manpower or electricity. 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 and wheel 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 present invention is: an electric bicycle hub motor and wheel structure that is conducive to sliding, which includes a motor and a wheel rim; the motor includes a motor main shaft and a motor housing, and the motor housing is rotatably mounted on the motor main shaft;

[0016] It also includes a one-way clutch component and a motor mounting box;

[0017] The motor installation box comprises a wheel rim shell and a wheel rim shell cover, the wheel rim shell is cylindrical, the shape of the wheel rim shell is adapted to the motor, and the wheel rim shell cover is installed at the cylindrical opening end of the wheel rim shell;

[0018] The motor is installed in the motor installation box, and the wheel rim shell and the wheel rim shell cover are rotatably installed on the motor main shaft;

[0019] The wheel rim is fixedly connected to the wheel rim shell of the motor mounting box through a connecting piece;

[0020] 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; the one-way clutch component is connected between the motor housing and the wheel rim cover through its one-way clutch inner ring and the one-way clutch outer ring, so that a connection structure that can rotate relatively in one direction is formed between the motor housing and the motor mounting box.

[0021] A further technical solution of the present invention is that the one-way clutch component is a one-way clutch or a ratchet mechanism or a one-way bearing.

[0022] A further technical solution of the present invention is: the one-way clutch outer ring is fixedly connected to the motor housing; the one-way clutch inner ring and the wheel rim cover are non-rotatably snap-connected, and the snap-connected connection structure is: a plurality of positioning bosses are provided on the inner side of the wheel rim cover, and the one-way clutch inner ring is provided with a limiting groove matching the positioning boss, and the positioning boss is installed in the limiting groove.

[0023] A further technical solution of the present invention is: the one-way clutch inner ring is connected to the motor housing, and the one-way clutch outer ring is connected to the wheel rim housing.

[0024] A further technical solution of the present invention 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;

[0025] 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;

[0026] 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;

[0027] The rotating shaft is movably connected to the stator side plate and the stator cover plate through the bearing, and is connected to the second motor housing.

[0028] The one-way clutch outer ring is fixedly connected to the second motor housing; the one-way clutch inner ring is non-rotatably connected to the wheel rim housing.

[0029] A further technical solution of the present invention is: a reduction mechanism is provided between the rotating shaft and the second motor housing, and the reduction mechanism includes a sun gear, three planetary gears and an inner gear ring; 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, and the three planetary gears are respectively movably mounted on three fixed shafts, one end of the fixed shaft is connected to the stator side plate, and the other end thereof is connected to the large end surface of the second main shaft of the motor.

[0030] A further technical solution of the present invention is that an overrunning clutch is provided between the inner gear ring and the second motor housing.

[0031] A further technical solution of the present invention is: the structure of the overrunning clutch between the inner gear ring and the second motor housing is: an inner boss is provided on one end face of the inner gear ring; a clutch plate is fixedly provided at a position corresponding to the inner boss of the inner gear ring in the second motor housing, and the outer diameter of the clutch plate matches the inner diameter of the inner boss; a groove is provided on the clutch plate, and a roller and a 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.

[0032] A further technical solution of the present invention is: the wheel rim shell cover is fixedly connected to the connecting piece by bolts; the wheel rim shell is connected to the first main shaft of the motor by bearing C; the first motor shell is movably connected to the first main shaft of the motor by bearings; the second motor shell is connected to the second main shaft of the motor by bearing B.

[0033] A further technical solution of the present invention is: the rotating shaft is connected to the stator side plate and the stator cover plate through bearings D and E respectively.

[0034] Compared with the prior art, the utility model has the following characteristics:

[0035] 1. The utility model can provide a first-level one-way clutch connection for 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.

[0036] 2. Since the utility model can also be used for the existing one-stage one-way clutch connection between the motor and the wheel rim, it is configured to use a two-stage one-way clutch structure to be connected in series between the motor and the wheel rim. When the electric bicycle is in a downhill gliding 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 the motor will be driven to passively rotate to generate electromagnetic resistance, so that the gliding time is reduced; because the second-stage one-way clutch structure (i.e., the one-way clutch or ratchet mechanism or one-way bearing) of the present invention is arranged between one side of the motor housing and the wheel rim, the second-stage one-way clutch structure drives the wheel rim to slide, that is, when the bicycle is gliding, the two-stage one-way clutch structures 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 gliding time and short gliding distance of the electric bicycle, so that when the motor of the electric bicycle stops working, the friction coefficient between the wheel and the motor is extremely low, and the wheel can continue to rotate freely by inertia, even if riding drives the wheel to rotate, it will not drive the motor to rotate, thereby realizing the bicycle attribute of complete human riding, making the downhill gliding or inertial gliding time long and the gliding distance long. The purpose of saving time, labor, electricity, energy saving and low-carbon travel is achieved.

[0037] The hub motor structure can completely replace the mid-mounted motor of an electric bicycle, thereby reducing costs and improving motor efficiency.

[0038] The detailed structure of the present utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0039] 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.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0041] 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.

[0042] 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.

[0043] 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

[0044] Figure 1 This is a schematic diagram of the structure of Example 1 of the utility model;

[0045] Figure 2 It is a three-dimensional structural schematic diagram (i.e., a perspective view) of Embodiment 1 of the utility model;

[0046] Figure 3 for Figure 1 AA section view;

[0047] Figure 4 This is a schematic diagram of the structure of Example 2 of the present utility model;

[0048] Figure 5 This is a schematic diagram of the structure of Embodiment 3 of the present utility model;

[0049] Figure 6 It is a schematic diagram of the prior art;

[0050] Figure 7 It is a schematic diagram of the prior art 2. DETAILED DESCRIPTION Example

[0051] like Figure 1-3As shown, an electric bicycle hub motor and wheel structure that is conducive to sliding includes a motor and a wheel rim 2. The motor includes a motor main shaft 11 and a motor housing 12. The motor housing 12 can rotate around the motor main shaft 11.

[0052] A one-way clutch component 3 is connected to the left end face of the motor housing 12. The one-way clutch component 3 is a component that can only rotate in one direction and includes a one-way clutch inner ring 31 and a one-way clutch outer ring 32. Preferably, the one-way clutch component 3 can be a one-way clutch or a ratchet mechanism or a one-way bearing. In this embodiment, the one-way clutch component 3 is a one-way bearing. The one-way clutch outer ring 32 is fixedly connected to the motor housing 12 by a connecting member or a connecting block, preferably, connected by bolts 5, which facilitates the replacement or maintenance of the one-way clutch component 3. Of course, the one-way clutch outer ring 32 and the motor housing 12 can also be an integrated structure, so that the combination of the two is more firm, reliable and durable.

[0053] A tire (not shown in the figure) is sleeved on the outer periphery of the wheel rim 2, and a wheel rim shell 22 is fixedly connected therein via a connecting rod (including connecting parts in the form of connecting blocks, etc., the same below) 21. The wheel rim shell 22 is in a cylindrical shape, and the motor is sleeved therein. The non-open end of the wheel rim shell 22 is connected to the motor spindle 11 via a bearing C104. The connecting rod 21 is connected to a wheel rim shell cover 4 on the side facing the open end of the wheel rim shell 22, so that the wheel rim shell cover 4 and the wheel rim shell 22 surround the motor, that is, the wheel rim shell cover 4 and the wheel rim shell 22 actually constitute an installation box for the motor, and the inner side of the wheel rim shell cover 4 is connected to the one-way clutch inner ring 31.

[0054] Preferably, a plurality of positioning bosses 41 are provided on the inner side of the wheel rim shell cover 4, and a plurality of limiting grooves 311 matching the positioning bosses 41 are provided on the end of the one-way clutch inner ring 31 away from the motor housing 12, and the positioning bosses 41 are arranged in the limiting grooves 311. In this embodiment, there are four limiting grooves 311 and positioning bosses 41, and their sizes match. In this way, the positioning bosses 41 are installed in the limiting grooves 311, and then the wheel rim shell cover 4 and the connecting piece or connecting block 21 are fastened by bolts, so that the wheel rim shell cover 4 and the one-way clutch inner ring 31 can be conveniently and firmly connected together.

[0055] The connection relationship between the one-way clutch inner ring 31, the one-way clutch outer ring 32, the wheel rim shell 4, and the motor shell 12 can be completely reversed, that is, the one-way clutch inner ring 31 is connected to the motor shell 12, and the one-way clutch outer ring 32 is connected to the wheel rim shell 4, 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.

[0056] The working principle of this embodiment is: when the motor of the electric bicycle is working, the motor housing 12 can rotate around the motor main shaft 11, and the motor housing 12 drives the wheel rim 2 to rotate through the one-way clutch component 3 (i.e., one-way bearing), so that the bicycle moves forward. When the electric bicycle slides downhill, the motor stops working, and the wheel composed of the wheel rim housing 4 and the wheel rim 2 continues to rotate. Since the friction resistance of the one-way clutch component 3 is much smaller than the various resistances inside the motor (friction resistance and magnetic resistance of the overrunning clutch, planetary gear system, etc.), the motor (including the motor housing 12) in the shell composed of the wheel rim housing 4 and the wheel rim shell 22 will basically be in a stationary state, and only the wheel is sliding freely. In this way, the electric bicycle slides for a long time when going downhill, which is roughly the same as the sliding time and distance of ordinary bicycles downhill, and is much farther than the sliding distance of traditional electric bicycles, which saves manpower and electricity and perfectly maintains the sliding function of the bicycle. Example

[0057] like Figure 4 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 is fixedly connected to the motor spindle 11, a rotor 13 is sleeved inside the stator 14, and 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 by a connecting rod 21, and other structural technical features are the same as those of Example 1. Example

[0058] like Figure 5 As shown, an electric bicycle hub motor and wheel structure that is conducive to sliding includes a motor and a wheel rim 2, wherein the motor includes a motor main shaft 11, a motor housing 12, a rotor 13 and a stator 14. 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 connected to each other, and the rotor 13 and the stator 14 are located in a cavity surrounded by the motor housing 12.

[0059] 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 thereof 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 be movably connected to the first main shaft 113 of the motor through a bearing 101.

[0060] The outer side 142 of the stator side plate (i.e., the side away from the stator cover plate 15) is provided with a plurality of protrusions 143. In the present embodiment, three protrusions 143 are evenly distributed. A large end face 112 is provided at one end of the second main shaft 111 of the motor. The large end face 112 is fixedly connected to the protrusions 143, i.e., an axial space is provided between the large end face 112 and the outer side of the stator side plate 142 through the protrusions 143. The second motor housing 121 is rotatably mounted on the second main shaft 111 of the motor through the bearing B103.

[0061] The rotating shaft 1 is connected to the stator side plate 142 and the stator cover plate 15 through the bearing D106 and the bearing E105 respectively, that is, the rotating shaft 1 is coaxially arranged with the first main shaft 13 of the motor and the second main shaft 111 of the motor.

[0062] 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.

[0063] An inner boss 171 is provided on one end face of the inner gear ring 17; a clutch plate 18 is fixedly provided at the position corresponding to the inner boss 171 of the inner gear ring 17 in the second motor housing 121, and the outer diameter of the clutch plate 18 matches the inner diameter of the inner boss 171; a groove is provided in the clutch plate 18, and a roller and a spring are installed in the groove. 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 inner side of the second motor housing 121 and the inner gear ring 17, which is externally manifested as an overrunning clutch provided between the motor housing 12 and the motor main shaft 11. At the same time, the sun gear 141, the planetary gears 16 and the inner gear ring 17 constitute a speed reduction mechanism located between the rotor 13 and the second motor housing 121.

[0064] A one-way clutch component 3 is connected to the left end face of the second motor housing 121. The one-way clutch component 3 is a component that can only rotate in one direction and includes a one-way clutch inner ring 31 and a one-way clutch outer ring 32. Preferably, the one-way clutch component 3 can be a one-way clutch or a ratchet mechanism or a one-way bearing. In this embodiment, the one-way clutch component 3 is a one-way bearing. The one-way clutch outer ring 32 is fixedly connected to the second motor housing 121 by a connecting member or a connecting block, preferably, connected by bolts 5, which facilitates the replacement or maintenance of the one-way clutch component 3. Of course, the one-way clutch outer ring 32 and the second motor housing 121 can also be an integrated structure, so that the combination of the two is more firm, reliable and durable.

[0065] A tire (not shown in the figure) is sleeved on the outer periphery of the wheel rim 2, and a wheel rim shell 22 is fixedly connected therein via a connecting rod (including connecting parts in the form of connecting blocks, etc., the same below) 21. The wheel rim shell 22 is in a cylindrical shape, and the motor is sleeved therein. The non-open end of the wheel rim shell 22 is connected to the first main shaft 113 of the motor via a bearing C104. The connecting rod 21 is connected to a wheel rim shell cover 4 on the side facing the open end of the wheel rim shell 22, so that the wheel rim shell cover 4 and the wheel rim shell 22 surround the motor, that is, the wheel rim shell cover 4 and the wheel rim shell 22 actually constitute an installation box for the motor, and the inner side of the wheel rim shell cover 4 is connected to the one-way clutch inner ring 31.

[0066] The one-way clutch inner ring 31 of the one-way clutch component 3 is fixedly connected to the wheel rim shell 4 through a connecting piece or a connecting block, and may also be an integrated structure. Preferably, the one-way clutch inner ring 31 and the wheel rim shell 4 are non-rotatably connected, and the specific structure may be: a plurality of positioning bosses 41 are provided on the inner side of the wheel rim shell 4, and a plurality of limiting grooves 311 cooperating with the positioning bosses 41 are provided at one end of the one-way clutch inner ring 31 away from the second motor housing 121, and the positioning bosses 41 are arranged in the limiting grooves 311. In this embodiment, there are four limiting grooves 311 and positioning bosses 41, and their sizes match each other. In this way, the positioning bosses 41 are installed in the limiting grooves 311, and then the wheel rim shell 4 is fastened to the connecting piece or the connecting block 21 by bolts A (41), so that the wheel rim shell 4 and the one-way clutch inner ring 31 can be conveniently and firmly connected together.

[0067] The connection relationship between the one-way clutch inner ring 31, the one-way clutch outer ring 32, the wheel rim shell 4, and the second motor shell 121 can be completely reversed, that is, the one-way clutch inner ring 31 is connected to the second motor shell 121, and the one-way clutch outer ring 32 is connected to the wheel rim shell 4, 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.

[0068] The working principle of the present invention 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 rotate the inner ring gear 17 in the opposite direction. Since the inner boss 171 of the inner ring gear 17 and the clutch plate 18 form a clutch structure (i.e., an overrunning clutch), 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, and the motor housing 12 drives the wheel rim 2 to rotate through the one-way clutch component 3 (i.e., a one-way bearing), so that the bicycle moves forward.

[0069] When the electric bicycle glides downhill, the motor stops working, and the wheel composed of the rim shell 4 and the rim 2 continues to rotate. Since the friction resistance of the one-way clutch component 3 is much smaller than the friction resistance of the overrunning clutch and the planetary gear train inside the motor, the motor (including the motor housing 12) in the shell composed of the rim shell 4 and the rim 2 is in a stationary state, and only the wheel is sliding 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.

[0070] In fact, the present invention provides a one-way clutch component 3 between the wheel rim 2 and the motor housing 12, that is, a two-stage one-way clutch structure in series and in the same direction is formed between the wheel rim 2 and the rotor 13 (that is, an overrunning clutch structure composed of the one-way clutch component 3, the inner gear ring 17 and the clutch plate 18). 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 has only one stage of a one-way wheel structure that is conducive to gliding.

[0071] 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. An electric bicycle hub motor and wheel structure that facilitates sliding, comprising a motor and a wheel rim (2); the motor comprises a motor main shaft (11) and a motor housing (12), and the motor housing (12) is rotatably mounted on the motor main shaft (11); Its characteristics are: It also includes a one-way clutch component (3) and a motor mounting box; The motor installation box comprises a wheel rim shell (22) and a wheel rim shell cover (4), wherein the wheel rim shell (22) is cylindrical, the shape of the wheel rim shell (22) is adapted to the motor, and the wheel rim shell cover (4) is installed at the cylindrical opening end of the wheel rim shell (22); The motor is installed in the motor installation box, and the wheel rim shell (22) and the wheel rim shell cover (4) are rotatably installed on the motor main shaft (11); The wheel rim (2) is fixedly connected to the wheel rim shell (22) of the motor mounting box via a connecting piece (21); The one-way clutch component (3) is a component that can only rotate in one direction and includes a one-way clutch inner ring (31) and a one-way clutch outer ring (32); the one-way clutch component (3) is connected between the motor housing (12) and the wheel rim housing (4) through its one-way clutch inner ring (31) and the one-way clutch outer ring (32), so that a connection structure that can rotate in one direction relative to the motor housing (12) and the motor mounting box is formed.

2. The electric bicycle hub motor and wheel structure that facilitates gliding according to claim 1 is characterized by: The one-way clutch component (3) is a one-way clutch or a ratchet mechanism or a one-way bearing.

3. The electric bicycle hub motor and wheel structure that facilitates gliding according to claim 1 or 2, characterized in that: The one-way clutch outer ring (32) is fixedly connected to the motor housing (12); the one-way clutch inner ring (31) is non-rotatably connected to the wheel rim cover (4) by means of a snap-fit ​​connection, wherein the snap-fit ​​connection structure comprises: a plurality of positioning bosses (41) are provided on the inner side of the wheel rim cover (4); the one-way clutch inner ring (31) is provided with a limiting groove (311) matched with the positioning bosses (41); and the positioning bosses (41) are installed in the limiting grooves (311).

4. The electric bicycle hub motor and wheel structure that facilitates gliding according to claim 1 or 2, characterized in that: The one-way clutch inner ring (31) is connected to the motor housing (12), and the one-way clutch outer ring (32) is connected to the wheel rim housing (4).

5. The electric bicycle hub motor and wheel structure that facilitates gliding according to claim 3 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 is connected to the second motor housing (121); The one-way clutch outer ring (32) is fixedly connected to the second motor housing (121); the one-way clutch inner ring (31) is connected to the wheel rim housing (4) in a non-rotatable snap-fit ​​connection.

6. The electric bicycle hub motor and wheel structure that facilitates gliding according to claim 5 is characterized by: A reduction mechanism is provided between the rotating shaft (1) and the second motor housing (121), and the reduction mechanism comprises a sun gear (141), three planetary gears (16) and an inner gear ring (17); one 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 gear ring (17) through the three planetary gears (16); 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 thereof is connected to the large end surface (112) of the second main shaft (111) of the motor; the inner gear ring (17) is connected to the second motor housing (121).

7. The electric bicycle hub motor and wheel structure that facilitates gliding according to claim 6 is characterized by: An overrunning clutch is also provided between the inner gear ring (17) and the second motor housing (121).

8. The electric bicycle hub motor and wheel structure that facilitates gliding according to claim 7 is characterized by: The structure of the overrunning clutch between the inner gear ring (17) and the second motor housing (121) is as follows: an inner boss (171) is provided on one end surface of the inner gear ring (17); a clutch plate (18) is fixedly provided at a position corresponding to the inner boss (171) of the inner gear ring (17) in the second motor housing (121), 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 a roller and a spring are installed in the groove. 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.

9. The electric bicycle hub motor and wheel structure that facilitates gliding according to claim 5 is characterized by: The wheel rim shell (4) is fixedly connected to the connecting member (21) via bolts; the wheel rim shell (22) is connected to the first main shaft (113) of the motor via a bearing C (104); the first motor shell (122) is movably connected to the first main shaft (113) of the motor via a bearing (101); and the second motor shell (121) is connected to the second main shaft (111) of the motor via a bearing B (103).

10. The electric bicycle hub motor and wheel structure that facilitates gliding according to claim 5, characterized in that: The rotating shaft (1) is connected to the stator side plate (142) and the stator cover plate (15) respectively through a bearing D (106) and a bearing E (105).

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