CN219545010U

CN219545010U - Moment sensor and motor integrated hub motor

Info

Publication number: CN219545010U
Application number: CN202320596256.8U
Authority: CN
Inventors: 李群
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-08-18
Anticipated expiration: 2033-03-17

Abstract

The utility model relates to a torque sensor and motor integrated hub motor, and belongs to the field of electric power-assisted vehicles. The utility model comprises a motor mandrel, a motor outer housing and a cable signal wire, and is structurally characterized in that: the motor core shaft penetrates through the motor outer housing and the spoke type moment sensor, the resistance strain gauge is arranged on the spoke type moment sensor, the resistance strain gauge is connected with the signal transmission system, and the signal transmission system is connected with a cable signal wire. The signal transmission system is used for transmitting signals to the bicycle-mounted controller, and the control of the hub motor is realized through the bicycle-mounted controller.

Description

Moment sensor and motor integrated hub motor

Technical Field

The utility model relates to a torque sensor and motor integrated hub motor, and belongs to the field of electric power-assisted vehicles.

Background

Electric auxiliary booster bicycles formed by torque sensors in the market at present are basically divided into two main booster system structural forms, one is called a central motor torque type, and the other is called a hub motor torque type.

In put motor moment formula: the motor structure and the central shaft type moment sensor structure are integrated and combined together to form a whole structure and are installed and fixed at the five-way position of the bicycle, and the central motor moment structure has the advantages of being integrated by combining all pipe fitting parts, compact in structure, extremely small in variability and very beneficial to long-term stability and standardization of product quality.

Moment type wheel hub motor: the power assisting system mode is that a hub motor and a torque sensor are independently separated, the motor is designed into a hub structure, most of the power assisting system mode is installed and fixed on a rear wheel of a bicycle, the power assisting system mode is assembled with a rim, spokes and a tire of the bicycle to form a rear wheel of the bicycle, the torque sensor for collecting the force of a person pedaling the bicycle is selected from the structure, and the power assisting system mode comprises a central shaft type, a toothed disc type, a chain tension type and the like, and the power assisting system mode is also divided into a magnetic induction type, a magnetostriction type, a resistance strain type and the like in principle.

In the prior art, when a torque type booster system of a hub motor is adopted, the torque sensor and the hub motor are of two mutually independent structures, namely, the torque sensor is required to be externally added on the hub motor, so that the hub motor is greatly changed, and the stability and the reliability of the hub motor are reduced.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide the torque sensor and motor integrated hub motor with reasonable structural design.

The utility model solves the problems by adopting the following technical scheme: the torque sensor and motor integrated hub motor comprises a motor mandrel, a motor outer housing and a cable signal line, and is structurally characterized in that: the motor core shaft penetrates through the motor outer housing and the spoke type moment sensor, the resistance strain gauge is arranged on the spoke type moment sensor, the resistance strain gauge is connected with the signal transmission system, and the signal transmission system is connected with a cable signal wire. The signal transmission system is used for transmitting signals to the bicycle-mounted controller, and the control of the hub motor is realized through the bicycle-mounted controller.

Further, the hub motor further comprises a bearing A and a bearing B, the motor outer housing is arranged on the motor mandrel through the bearing A, and the spoke type moment sensor is arranged on the motor mandrel through the bearing B. The motor outer housing and the motor mandrel can keep concentric rotation.

Further, the hub motor further comprises a static rotor, a movable stator magnetic steel and a movable stator magnetic steel housing, the static rotor is arranged on the motor mandrel, the movable stator magnetic steel housing is arranged in the motor outer housing, the movable stator magnetic steel is arranged on the movable stator magnetic steel housing, and the movable stator magnetic steel is matched with the static rotor. The motor outer housing can rotate through the cooperation of the static rotor and the movable stator magnetic steel.

Further, the hub motor further comprises a flywheel, and the flywheel is arranged on the spoke type torque sensor. The flywheel is dragged to rotate through the chain wheel and the chain, so that the spoke type moment sensor rotates and simultaneously elastically deforms.

Further, the hub motor further comprises a motor circuit board, the motor circuit board is arranged on the motor mandrel, and the motor circuit board is connected with the static rotor and the cable signal line. The stator is wound with a plurality of groups of coils, and the coil windings are connected with the cable signal wire through the motor circuit board and then communicated with an external power supply.

Further, spoke formula torque sensor includes wheel hub, rim and spoke, wheel hub's outer lane and rim's inner circle pass through spoke and are connected, resistance strain gauge sets up on the spoke, wheel hub passes through bearing B and sets up at motor spindle, the rim passes through the screw setting on motor housing. When the hub and the rim are stressed reversely, the spoke can deform, and then the resistance strain gauge can sense deformation.

Further, the signal transmission system is a wireless transmission type signal transmission system, the wireless transmission type signal transmission system comprises a Hall element, a magnetic ring, a power wireless transmission coil, a power wireless receiving coil, an electric signal receiving module circuit, an electric signal transmitting module circuit, a static circuit board and a signal amplifying circuit board, the static circuit board is arranged on a motor mandrel, the Hall element, the power wireless transmission coil and the electric signal receiving module circuit are all arranged on the static circuit board, the signal amplifying circuit board is arranged on a spoke type torque sensor, the magnetic ring, the power wireless receiving coil and the electric signal transmitting module circuit are all arranged on the signal amplifying circuit board, the Hall element is connected with the magnetic ring, the power wireless transmission coil is connected with the power wireless receiving coil, and the electric signal receiving module circuit is connected with the electric signal transmitting module circuit.

Further, the static circuit board is arranged on the motor mandrel through the fixing seat, and the spoke type moment sensor is provided with a waterproof sealing cover.

Further, the signal transmission system is a slip ring contact type signal transmission system, the slip ring contact type signal transmission system comprises a Hall element, a magnetic ring, a Hall circuit board and a slip ring, the Hall circuit board is arranged on a motor mandrel, the Hall element is arranged on the Hall circuit board, the magnetic ring and the slip ring are arranged on a spoke type moment sensor, the Hall element is connected with the magnetic ring, and the Hall circuit board is connected with the slip ring.

Further, the Hall circuit board is arranged on a slip ring housing, and the slip ring housing is arranged on the motor mandrel through a straight key.

Further, the number of spoke is typically 2-16.

Compared with the prior art, the utility model has the following advantages: the torque sensor is integrated on the right end cover of the hub motor, the hub motor can have the function of torque sensing detection under the condition that the original hub motor is not damaged, and then the right end cover can have the function of the outer cover of the hub motor and the function of torque detection, signal transmission can be realized through a signal transmission system of two modes, the signal is transmitted to the controller, and the power-assisted starting and the power-assisted magnitude of the hub motor are controlled through the controller.

Drawings

Fig. 1 is a schematic diagram of a front view structure of a torque sensor and motor integrated hub motor (a signal transmission system is a wireless transmission system) according to embodiment 1 of the present utility model.

Fig. 2 is a schematic diagram of a front view structure of a torque sensor and motor integrated hub motor (the signal transmission system is a slip ring contact type) according to embodiment 2 of the present utility model.

Fig. 3 is a schematic right-view structural diagram of a torque sensor and motor integrated hub motor according to an embodiment of the present utility model.

In the figure: the motor comprises a motor mandrel 1, a bearing A2, a bearing B3, a motor outer housing 4, a static rotor 5, a movable stator magnetic steel 6, a movable stator magnetic steel housing 7, a motor circuit board 8, a spoke type moment sensor 9, a resistance strain gauge 10, a cable signal wire 11, a flywheel 12, a Hall element 13, a magnetic ring 14, a power wireless transmission coil 15, a power wireless receiving coil 16, a waterproof sealing cover 17, an electric signal receiving module circuit 18, an electric signal transmitting module circuit 19, a fixed seat 20, a static fixing circuit board 21, a signal amplifying circuit board 22, a straight key 23, a slip ring housing 24, a Hall circuit board 25, a slip ring 26, a hub 27, a rim 28 and a wheel spoke 29.

Detailed Description

The present utility model will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present utility model and not limited to the following examples.

It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the utility model, are not intended to be critical to the essential characteristics of the utility model, but are otherwise, required to achieve the objective and effect taught by the utility model. In the meantime, if the terms such as "upper", "lower", "left", "right", "middle" and "a" are used in the present specification, they are merely for convenience of description, but are not intended to limit the scope of the present utility model, and the relative relation changes or modifications are considered to be within the scope of the present utility model without substantial modification of the technical content.

In embodiment 1 (shown in fig. 1 and 3), the signal transmission system is a wireless transmission system.

The torque sensor and motor integrated hub motor in the embodiment comprises a motor mandrel 1, a bearing A2, a bearing B3, a motor outer housing 4, a static rotor 5, a movable stator magnetic steel 6, a movable stator magnetic steel housing 7, a motor circuit board 8, a spoke type torque sensor 9, a resistance strain gauge 10, a cable signal wire 11, a flywheel 12 and a signal transmission system,

the flywheel 12 in this embodiment is disposed on a spoke-type torque sensor 9, the spoke-type torque sensor 9 is disposed on a motor housing shell 4, a motor core shaft 1 penetrates through the motor housing shell 4 and the spoke-type torque sensor 9, the motor housing shell 4 is disposed on the motor core shaft 1 through a bearing A2, the spoke-type torque sensor 9 is disposed on the motor core shaft 1 through a bearing B3, a resistance strain gauge 10 is disposed on the spoke-type torque sensor 9, the resistance strain gauge 10 is connected with a signal transmission system, and the signal transmission system is connected with a cable signal line 11.

The static rotor 5 and the motor circuit board 8 in this embodiment are both arranged on the motor mandrel 1, and the static rotor 5 is connected with the motor circuit board 8, the motor circuit board 8 is connected with the cable signal line 11, the movable stator magnetic steel housing 7 is arranged in the motor outer housing 4, the movable stator magnetic steel 6 is arranged on the movable stator magnetic steel housing 7, and the movable stator magnetic steel 6 is matched with the static rotor 5.

The spoke type moment sensor 9 in the embodiment comprises a hub 27, a rim 28 and spokes 29, wherein the outer ring of the hub 27 is connected with the inner ring of the rim 28 through the spokes 29, the resistance strain gauge 10 is arranged on the spokes 29, the hub 27 is arranged on the motor mandrel 1 through a bearing B3, the rim 28 is arranged on the motor outer housing 4 through screws, and the number of the spokes is usually 2-16.

The signal transmission system in this embodiment is a wireless transmission type signal transmission system, which includes a hall element 13, a magnetic ring 14, a power wireless transmission coil 15, a power wireless receiving coil 16, an electric signal receiving module circuit 18, an electric signal transmitting module circuit 19, a static circuit board 21 and a signal amplifying circuit board 22, and a waterproof cover 17 is provided on the spoke type torque sensor 9. The static circuit board 21 is arranged on the motor mandrel 1 through the fixing seat 20, the Hall element 13, the power wireless transmission coil 15 and the electric signal receiving module circuit 18 are all arranged on the static circuit board 21, the signal amplifying circuit board 22 is arranged on the spoke type torque sensor 9, the magnetic ring 14, the power wireless transmission coil 16 and the electric signal transmitting module circuit 19 are all arranged on the signal amplifying circuit board 22, the Hall element 13 is connected with the magnetic ring 14, the power wireless transmission coil 15 is connected with the power wireless transmission coil 16, and the electric signal receiving module circuit 18 is connected with the electric signal transmitting module circuit 19.

As shown in fig. 1:

the stator rotor 5 is wound with a plurality of groups of coils, the coil windings are connected with a cable signal wire 11 through a motor circuit board 8 and then are communicated with an external power supply, the stator rotor 5 is fixedly arranged on a motor mandrel 1, the motor mandrel 1 is a rear wheel shaft of a bicycle, which is fixedly arranged on a bottom fork of a rear wheel of the bicycle, the movable stator magnetic steel 6 is uniformly distributed in a movable stator magnetic steel housing 7 and is fixedly integrated with the motor housing 4 in the motor housing 4, the motor housing 4 synchronously rotates, a plurality of small holes for fixing spokes of the bicycle are uniformly distributed on the whole peripheral ring outside the motor housing 4, and the hub motor and the bicycle steel ring can be connected into the rear wheel of the bicycle by weaving the spokes of the bicycle.

The motor outer cover 4 is generally composed of 3 parts, namely a middle cylindrical structure and left and right end covers, wherein an inner hole of the middle cylindrical structure can fix a movable stator magnetic steel cover 7, the outer circle of the middle cylindrical structure can be penetrated and fixed with bicycle spokes, rolling bearings are arranged on the left and right end covers to ensure that the motor outer cover 4 and a static rotor 5 keep good concentricity to rotate, a gear reduction mechanism is arranged in the left end cover of the motor outer cover 4, a flywheel 12 is arranged outside the right end cover, a fastened flywheel 12 is arranged on the right end cover and is pulled by the rotation of a front chain, the direction of the rotation of the traction force is opposite to the direction of resistance generated by the middle cylindrical structure, a steel ring connected with the bicycle spokes and a landing tire under the influence of ground friction resistance, and two forces with opposite acting forces are generated between the middle cylindrical structure and the right end cover, as shown in fig. 3.

The right end cover with the flywheel 12 is designed into a spoke type structure shown in fig. 3, then a resistance strain gauge 10 and the like are stuck to manufacture a spoke type moment sensor 9, the manufactured spoke type moment sensor 9 is still used as the right end cover to be installed back to the middle cylindrical structure to be fastened by screws, and the right end cover at the moment has the function of a moment sensor besides being used as an outer housing of a hub motor.

The working principle of the torque sensor integrally combined by the hub motor and the torque sensor is as follows, and is shown in fig. 3: the wheel hub motor is integrated with the rim and the tyre of the bicycle into a whole by weaving the bicycle spokes, and the wheel hub motor is arranged and fixed in the bottom fork clamping groove of the rear tripod of the bicycle, and the flywheel 12 on the right end cover of the wheel hub motor is linked with the toothed disc on the middle shaft through a chain.

When a person treads the foot to rotate the toothed disc of the bicycle, the chain also pulls and drags the flywheel 12 to rotate clockwise, the right end cover is designed into a spoke type structure, namely, a spoke type moment sensor 9, as shown in fig. 3, the flywheel 12 is fixedly arranged on the spoke type moment sensor 9, when the flywheel 12 is pulled by the chain to rotate clockwise, the hub 27 of the spoke type moment sensor 9 synchronously follows the flywheel 12 to rotate, the rim 28 of the spoke type moment sensor 9 is fastened on the motor housing shell 4 by screws, namely, the rim 28 of the spoke type moment sensor 9 is subjected to friction resistance generated by the rear wheel of the bicycle and the ground, the combined force of two friction forces is opposite to the rotating force generated by the chain pulling the flywheel 12, namely, the rim 28 of the spoke type moment sensor 9 is opposite to the stressed direction of the hub 27, so that the spoke type moment sensor 29 deforms, the resistance strain gauge 10 adhered on the spoke 29 senses a deformation amount proportional to the magnitude of the force, the deformation amount is converted into an electric signal output by an internal detection circuit, the electric signal detected by the spoke type moment sensor 9 is transmitted to a bicycle controller to the bicycle, and the electric power assisting force is started by the bicycle controller and the bicycle is started up by the hub.

The examples shown in fig. 1 and 3 are as follows:

the static rotor 5 wound with a plurality of coils is fixed on the motor mandrel 1, a cable signal wire 11 penetrates into an inner hole of the motor mandrel 1 to be in signal butt joint with a motor winding coil of the static rotor 5 and a static circuit board 21 arranged and fixed on the motor mandrel 1 through a motor circuit board 8, all electric signals inside the hub motor are communicated inside and outside through the cable signal wire 11, and the motor mandrel 1 is arranged and fixed on left and right bottom forks of a rear tripod of a bicycle, namely, the wheel shaft of the rear wheel of the bicycle.

The motor outer housing 4 is formed by assembling a left end cover, a right end cover and a middle cylindrical structure 3, a gear combination speed reducer is arranged in the left end cover, an inner hole of the middle cylindrical structure is a combination of a movable stator magnetic steel 6 and a movable stator magnetic steel housing 7, a plurality of small holes penetrating into bicycle spokes are distributed on an outer ring of the middle cylindrical structure, a hub motor, a bicycle steel ring and a tire are assembled together by the bicycle spokes to form a bicycle rear wheel, a bearing A2 and a bearing B3 are respectively arranged on the left end cover and the right end cover of the motor outer housing 4, and the concentricity of a stator and a rotor of the hub motor is kept to rotate well.

The flywheel 12 is arranged outside the right end cover, the flywheel is linked with a tooth disc on a five-way center shaft by a chain, the original right end cover is changed into a spoke type moment sensor 9, the structure of the spoke type moment sensor 9 is shown in fig. 3, the flywheel 12 is arranged on a hub 27 of the spoke type moment sensor 9, a rim 28 of the spoke type moment sensor 9 is fixed on a middle cylindrical structure by screws, a resistance strain gauge 10 is stuck on a spoke 29 between the hub 27 and the rim 28 of the spoke type moment sensor 9, an induction detection circuit of the spoke type moment sensor 9 is formed by the resistance strain gauge 10, a signal amplification circuit board 22 is fixedly arranged on the inner side of the spoke type moment sensor 9, a power wireless receiving coil 16 is also arranged on the signal amplification circuit board 22 and corresponds to a power wireless transmission coil 15 arranged on a static circuit board 21 in parallel, an electric signal transmitting module circuit 19 is also arranged on the signal amplification circuit board 22 and works in a pairing mode with an electric signal receiving module circuit 18 arranged on the static circuit board 21, and a magnetic ring 14 is also arranged on the signal amplification circuit board 22 and corresponds to an electric signal receiving module 13 arranged on the static circuit board 21.

When a person treads and rides, the chain wheel rotates, the chain pulls the flywheel 12 to rotate forwards and clockwise, the motor outer housing 4 of the hub motor is influenced by the contact friction resistance of the tire and the ground to prevent the flywheel 12 from rotating forwards, at the moment, the spoke type moment sensor 9 rotates in the opposite direction with the rim 28 and the hub 27 and is asynchronous, so that the spoke 29 on the spoke type moment sensor 9 deforms, the deformation is sensed by a detection circuit formed by the resistance strain gauge 10 adhered to the spoke 29, the deformation is converted into electric quantity, the electric quantity is transmitted to the electric signal receiving module circuit 18 of the static circuit board 21 in a wireless mode through the amplifying circuit and the electric signal transmitting module circuit 19 to be received, the received moment signal is output to the controller through the cable signal wire 11, and finally the controller starts and regulates the output power assisting force of the hub motor according to the magnitude of the moment electric signal.

In embodiment 2 (shown in fig. 2 and 3), the signal transmission system is a slip ring contact type.

The signal transmission system in this embodiment is a slip ring contact type signal transmission system, and the slip ring contact type signal transmission system includes a hall element 13, a magnetic ring 14, a hall circuit board 25 and a slip ring 26, where the hall circuit board 25 is disposed on a slip ring housing 24, the slip ring housing 24 is disposed on a motor spindle 1 through a straight key 23, the hall element 13 is disposed on the hall circuit board 25, the magnetic ring 14 and the slip ring 26 are both disposed on a spoke type torque sensor 9, the hall element 13 is connected with the magnetic ring 14, and the hall circuit board 25 is connected with the slip ring 26.

As shown in fig. 2:

the stator 5 is wound with a plurality of groups of coils, the coil windings are connected with a cable signal wire 11 through a motor circuit board 8 and then are communicated with an external power supply, the stator 5 is fixedly arranged on a motor mandrel 1, the motor mandrel 1 is equivalent to a rear wheel shaft of a bicycle and is fixedly arranged on a bottom fork of a rear tripod of the bicycle, the movable stator magnetic steel 6 is uniformly distributed in a movable stator magnetic steel housing 7 and then is fastened in a motor outer housing 4 to be fixedly integrated with the motor outer housing 4, the motor outer housing 4 synchronously rotates, a plurality of small holes for fixing spokes of the bicycle are uniformly distributed on the whole circumference of a cylindrical part of the motor outer housing 4, and the hub motor, the rim of the bicycle and the tyre can be formed into a rear wheel of the bicycle by spoke braiding.

The motor outer housing 4 is generally formed by assembling 3 parts, namely a middle cylindrical structure, a left end cover and a right end cover, wherein an inner hole of the middle cylindrical structure can be used for fixing a movable stator magnetic steel housing 7, and the outer circle of the middle cylindrical structure can be used for penetrating and fixing bicycle spokes, as the movable stator magnetic steel housing 7 is a rotating body along with the motor outer housing 4, a bearing A2 and a bearing B3 are respectively arranged in the left end cover and the right end cover of the motor outer housing 4, so that good concentricity rotation is kept between the movable stator magnetic steel 6 and the static rotor 5 of the hub motor, a gear reduction mechanism is arranged in the left end cover of the motor outer housing 4, a flywheel 12 is arranged on the outer wall of the right end cover, and the flywheel 12 arranged on the right end cover is driven by a chain to rotate in the clockwise direction by the rotation of a front toothed disc.

Because the motor housing shell 4 is formed by penetrating the woven connection steel ring through the bicycle spoke and forming an integral body of the rear wheel by the tire, the direction of resistance generated by the impact of ground friction resistance on the tire of the rear wheel is exactly opposite to the direction of forward traction rotation force of the flywheel 12 mounted on the right end cover by the chain, two forces with opposite actions are generated between the screw combination part of the right end cover and the middle cylindrical structure and the mounting and fixing part of the flywheel 12, as shown in fig. 3, the hub motor just uses the physical phenomenon generated on the right end cover, the right end cover mounted with the flywheel 12 is manufactured into the spoke type structure shown in fig. 3, namely the spoke type moment sensor 9, then the resistance strain gauge 10 and the like are stuck, a non-electric measuring circuit is formed, one spoke type moment sensor 9 is manufactured, the manufactured spoke type moment sensor 9 is still used as the right end cover function of the hub motor to be mounted back to the middle cylindrical structure for encapsulation, the right end cover is fastened on the middle cylindrical structure by the screw, and the right end cover at the moment has the function of the moment sensor besides being used as the hub motor.

The working principle of the moment sensor on the integrated assembly of the hub motor and the moment sensor is shown in fig. 3, the hub motor is integrated with the rim and the tire of the bicycle by weaving and combining with the bicycle spokes to form a rear wheel with the motor of the bicycle, the rear wheel with the hub motor is installed and fixed in a bottom fork clamping groove of a rear tripod of the bicycle, and a flywheel 12 on a right end cover of the hub motor is linked with a toothed disc on a five-way center shaft through a chain.

When a person treads to rotate the chain wheel of the bicycle, the chain also pulls and drags the flywheel 12 to rotate clockwise as shown in fig. 3, the right end cover is now changed into the spoke type moment sensor 9, the flywheel 12 is installed and fixed on the hub 27 of the spoke type moment sensor 9, when the flywheel 12 is pulled by the chain to rotate clockwise, the hub 27 part of the spoke type moment sensor 9 is also driven to synchronously rotate, the rim 28 part of the spoke type moment sensor 9 is fastened on the motor outer housing 4 by screws, namely the motor outer housing 4 part is equal to the whole body formed by the rear wheel rim and the tyre of the bicycle, the weight pressure of the human body is added on the ground by the tyre, the rear wheel and the ground generate friction resistance, which is opposite to the rotating force of the chain and drags the flywheel 12, namely the resistance direction of the rim 28 reflected on the spoke of the spoke type moment sensor 9 is opposite to the rotating direction of the hub 27, the spoke strip 29 of the spoke type moment sensor 9 generates distortion, the detection circuit formed by the resistance strain gauge 10 attached on the spoke strip 29 detects the torsion magnitude to be a proportional deformation, the motor is converted into a small electric signal, and the motor is output to the bicycle controller to be a large power-assisted by a bicycle controller, and the bicycle controller is started.

The examples shown in fig. 2 and 3 are as follows:

the static rotor 5 of the hub motor is fixed in a bottom fork clamping groove of a rear tripod of a bicycle along with the motor mandrel 1, is static, and the movable stator magnetic steel 6 and the movable stator magnetic steel housing 7 are fixed in an inner hole of a cylindrical part of the motor housing shell 4 together and synchronously rotate along with the motor housing shell 4.

The motor outer housing 4 is formed by combining a left end cover, a right end cover and a middle cylindrical structure 3, the inside of the left end cover is a reducer structure for combining motor gears, an inner hole of the middle cylindrical structure is used for fixing a movable stator magnetic steel housing 7, the outside of the middle cylindrical structure can be penetrated by bicycle spokes into small holes to weave and connect a bicycle steel ring and a tire to form a bicycle rear wheel, and a bearing A2 and a bearing B3 are respectively arranged on the left end cover and the right end cover of the motor outer housing 4 so as to keep the rotation of the stator and the rotor of the hub motor with good concentricity.

The right end cap has two functions: one is used as a part of a wheel hub motor housing, the other is an elastomer of a moment sensor, the structure of the spoke type moment sensor 9 is shown in fig. 3, a flywheel 12 is arranged on a wheel hub 27 of the spoke type moment sensor 9, a rim 28 of the spoke type moment sensor 9 is fixed on a middle cylindrical structure of the motor housing 4 by screws, when the flywheel 12 is pulled by a chain to rotate clockwise, the rim 28 of the spoke type moment sensor 9 is influenced by friction resistance of the tyre contacting the ground to generate torsion force different from the rotation direction of the flywheel 12, so that a spoke 29 of the spoke type moment sensor 9 is deformed, and the torsion deformation is sensed and converted into electric signal output by a measuring circuit formed by a resistance strain gauge 10 adhered on the spoke 29.

The inside of the spoke type torque sensor 9 is fixedly provided with a slip ring type contact transmitter, as shown in fig. 2, the function of the slip ring type contact transmitter is that a sensor in a rotating body is used for transmitting an electric signal, an external power supply is transmitted into the rotating body, the slip ring type contact transmitter is divided into a movable part and a static part, a Hall circuit board 25 is arranged on a slip ring housing 24, the Hall circuit board 25 is fixed on a motor mandrel 1 through a straight key 23 and belongs to a static body, the electric signal transmission outside a hub motor can be realized through a cable signal wire 11, the rotating body of the slip ring type contact transmitter comprises a slip ring 26 which is arranged on the inside of the spoke type torque sensor 9, when a motor housing 4 of the hub motor rotates, a sliding needle on the Hall circuit board 25 corresponding to the slip ring 26 slides concentrically in a slip ring groove of the slip ring 26, the mutual transmission of the electric signal between the rotating body and the static body is realized, a magnetic ring 14 is also arranged on a slip ring fixing board for fixing the slip ring 26 in the rotating body, the magnetic ring 14 synchronously rotates along with the slip ring 26, a Hall circuit board 25 corresponding to the slip ring 14 is arranged on the Hall circuit board 25, and the detecting element of the magnetic ring 13 is arranged on the slip ring for detecting the rotation speed of the hub and the hub of the hub motor and deducing the rotation frequency of a pedal of a bicycle.

In addition, it should be noted that the specific embodiments described in the present specification may vary from part to part, from name to name, etc., and the above description in the present specification is merely illustrative of the structure of the present utility model. All equivalent or simple changes of the structure, characteristics and principle according to the inventive concept are included in the protection scope of the present patent. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the utility model as defined in the accompanying claims.

Claims

1. The utility model provides a moment sensor and motor integral type in-wheel motor, includes motor dabber (1), motor housing shell (4) and cable signal line (11), its characterized in that: the motor is characterized by further comprising a spoke type moment sensor (9), a resistance strain gauge (10) and a signal transmission system, wherein the spoke type moment sensor (9) is arranged on the motor outer housing (4), the motor mandrel (1) penetrates through the motor outer housing (4) and the spoke type moment sensor (9), the resistance strain gauge (10) is arranged on the spoke type moment sensor (9), the resistance strain gauge (10) is connected with the signal transmission system, and the signal transmission system is connected with the cable signal line (11).

2. The torque sensor and motor integrated hub motor of claim 1, wherein: the hub motor further comprises a bearing A (2) and a bearing B (3), the motor outer housing (4) is arranged on the motor mandrel (1) through the bearing A (2), and the spoke type moment sensor (9) is arranged on the motor mandrel (1) through the bearing B (3).

3. The torque sensor and motor integrated hub motor of claim 1, wherein: the hub motor further comprises a static rotor (5), a movable stator magnetic steel (6) and a movable stator magnetic steel housing (7), wherein the static rotor (5) is arranged on the motor mandrel (1), the movable stator magnetic steel housing (7) is arranged in the motor outer housing (4), the movable stator magnetic steel (6) is arranged on the movable stator magnetic steel housing (7), and the movable stator magnetic steel (6) is matched with the static rotor (5).

4. The torque sensor and motor integrated hub motor of claim 1, wherein: the hub motor further comprises a flywheel (12), and the flywheel (12) is arranged on the spoke type moment sensor (9).

5. The torque sensor and motor integrated hub motor of claim 1, wherein: the hub motor further comprises a motor circuit board (8), the motor circuit board (8) is arranged on the motor mandrel (1), and the motor circuit board (8) is connected with the static rotor (5) and the cable signal line (11).

6. The torque sensor and motor integrated hub motor of claim 1, wherein: the spoke type moment sensor (9) comprises a hub (27), a rim (28) and spoke strips (29), wherein an outer ring of the hub (27) is connected with an inner ring of the rim (28) through spoke strips (29), a resistance strain gauge (10) is arranged on the spoke strips (29), the hub (27) is arranged on a motor mandrel (1) through a bearing B (3), and the rim (28) is arranged on a motor outer housing (4) through screws.

7. The torque sensor and motor integrated hub motor of claim 1, wherein: the signal transmission system is a wireless transmission type signal transmission system, the wireless transmission type signal transmission system comprises a Hall element (13), a magnetic ring (14), a power wireless transmission coil (15), a power wireless receiving coil (16), an electric signal receiving module circuit (18), an electric signal transmitting module circuit (19), a static circuit board (21) and a signal amplifying circuit board (22), the static circuit board (21) is arranged on a motor mandrel (1), the Hall element (13), the power wireless transmission coil (15) and the electric signal receiving module circuit (18) are all arranged on the static circuit board (21), the signal amplifying circuit board (22) is arranged on a spoke type torque sensor (9), the magnetic ring (14), the power wireless receiving coil (16) and the electric signal transmitting module circuit (19) are all arranged on the signal amplifying circuit board (22), the Hall element (13) is connected with the magnetic ring (14), the power wireless transmission coil (15) is connected with the power wireless receiving coil (16), and the electric signal receiving module circuit (18) is connected with the electric signal transmitting module circuit (19).

8. The torque sensor and motor integrated hub motor of claim 7, wherein: the static circuit board (21) is arranged on the motor mandrel (1) through the fixing seat (20), and the spoke type moment sensor (9) is provided with a waterproof sealing cover (17).

9. The torque sensor and motor integrated hub motor of claim 1, wherein: the signal transmission system is a slip ring contact type signal transmission system, the slip ring contact type signal transmission system comprises a Hall element (13), a magnetic ring (14), a Hall circuit board (25) and a slip ring (26), the Hall circuit board (25) is arranged on a motor mandrel (1), the Hall element (13) is arranged on the Hall circuit board (25), the magnetic ring (14) and the slip ring (26) are both arranged on a spoke type moment sensor (9), the Hall element (13) is connected with the magnetic ring (14), and the Hall circuit board (25) is connected with the slip ring (26).

10. The torque sensor and motor integrated hub motor of claim 9, wherein: the Hall circuit board (25) is arranged on the slip ring housing (24), and the slip ring housing (24) is arranged on the motor mandrel (1) through a straight key (23).