WO2024066262A1 - 力矩及速度传感装置及电动自行车 - Google Patents

力矩及速度传感装置及电动自行车 Download PDF

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Publication number
WO2024066262A1
WO2024066262A1 PCT/CN2023/084796 CN2023084796W WO2024066262A1 WO 2024066262 A1 WO2024066262 A1 WO 2024066262A1 CN 2023084796 W CN2023084796 W CN 2023084796W WO 2024066262 A1 WO2024066262 A1 WO 2024066262A1
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WO
WIPO (PCT)
Prior art keywords
torque
wall
mounting frame
sensing device
speed
Prior art date
Application number
PCT/CN2023/084796
Other languages
English (en)
French (fr)
Inventor
周佳林
罗绍俊
熊贵林
Original Assignee
广东威灵电机制造有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 广东威灵电机制造有限公司 filed Critical 广东威灵电机制造有限公司
Publication of WO2024066262A1 publication Critical patent/WO2024066262A1/zh

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B62M6/45—Control or actuating devices therefor
    • B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
    • B62J45/20—Cycle computers as cycle accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
    • B62J45/40—Sensor arrangements; Mounting thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
    • B62J45/40—Sensor arrangements; Mounting thereof
    • B62J45/41—Sensor arrangements; Mounting thereof characterised by the type of sensor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
    • B62J45/40—Sensor arrangements; Mounting thereof
    • B62J45/41—Sensor arrangements; Mounting thereof characterised by the type of sensor
    • B62J45/412—Speed sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
    • B62J45/40—Sensor arrangements; Mounting thereof
    • B62J45/42—Sensor arrangements; Mounting thereof characterised by mounting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
    • B62J45/00—Electrical equipment arrangements specially adapted for use as accessories on cycles, not otherwise provided for
    • B62J45/40—Sensor arrangements; Mounting thereof
    • B62J45/42—Sensor arrangements; Mounting thereof characterised by mounting
    • B62J45/421—Sensor arrangements; Mounting thereof characterised by mounting at the pedal crank
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B62M6/45—Control or actuating devices therefor

Definitions

  • the present application relates to the technical field of electric bicycles, and in particular to a torque and speed sensor device and an electric bicycle.
  • the wheel hub motor drive system has a certain market share in the power-assisted electric bicycle industry due to its price advantage and the advantages of easy modification.
  • How the power drive of the wheel hub motor can be coordinated with human power to enable users to obtain a comfortable riding experience has always been the goal pursued by power-assisted electric bicycle practitioners, and human power signal acquisition is crucial to the basis of drive control.
  • One of the advantages of electric bicycle hub motors is that they require little modification to traditional bicycles and are easy to modify.
  • the power of the left and right pedals of traditional bicycles is first gathered on the central axis. Therefore, how to achieve signal acquisition in the space where the central axis of a traditional bicycle is installed and how to minimize the modification of the traditional bicycle is one of the difficulties in the design of power-assisted electric bicycle drive components.
  • the present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a torque and speed sensor device.
  • the present application further provides an electric bicycle having the above-mentioned torque and speed sensing device.
  • the torque and speed sensing device includes:
  • a middle shaft is rotatably disposed in the five-way tube, and an outer wall of the middle shaft is provided with an induction tooth portion, and the induction tooth portion includes a plurality of teeth uniformly distributed along the circumference of the outer wall of the middle shaft;
  • a connecting piece sleeved on the outer circumference of the middle shaft, for transmitting power to the crankset
  • a deformable member one end of which is fixedly connected to the central axis, and the other end of which is fixedly connected to the connecting member;
  • a mounting frame fixedly disposed in the five-way pipe and sleeved on the outer circumference of the deformation member;
  • a signal processing circuit board is installed on the mounting frame
  • a speed sensor is mounted on the signal processing circuit board and is arranged opposite to the sensing tooth portion;
  • a permanent magnet mounted on a side of the signal processing circuit board away from the speed sensor, the speed sensor being used to sense a change in the magnetic field of the permanent magnet to transmit a speed signal to the signal processing circuit board;
  • the torque sensor is mounted on the mounting frame and is used to sense the deformation of the deformable member to transmit a torque signal to the signal processing circuit board.
  • the torque and speed sensing device further includes a shielding member, and the shielding member is disposed on the periphery of the torque sensor.
  • the outer wall of the mounting frame is provided with protrusions located at both axial ends of the torque sensor, and the shielding member is clamped between the two protrusions.
  • the torque sensor includes two induction coils, the outer wall of the mounting frame is provided with two annular grooves, and the two induction coils are installed in the corresponding annular grooves.
  • the torque sensor further includes a connecting wire
  • the induction coil is connected to the signal processing circuit board via the connecting wire
  • an outer wall of the mounting frame is provided with an avoidance groove for avoiding the connecting wire.
  • the mounting frame is provided with a groove, and the speed sensor is embedded in the groove.
  • the present application also includes a first mounting seat and a second mounting seat, wherein the first mounting seat and the second mounting seat are mounted on both ends of the five-way tube along the axial direction, the middle shaft is rotatably mounted on the first mounting seat via a first bearing, and the connecting member is rotatably mounted on the second mounting seat via a second bearing.
  • a slot is provided on an inner wall of the first mounting seat, and a rib is provided on an outer wall of the mounting frame.
  • the mounting frame is circumferentially fixed to the first mounting seat by snapping the rib into the slot.
  • a boss is provided on the outer wall of the deformable member, a limiting member is installed on the outer wall of the central axis, and the mounting frame is clamped between the boss and the limiting member.
  • an outer wall of the central axis is provided with a mounting tooth portion
  • an inner wall of the deformable member is provided with a matching tooth portion that matches with the mounting tooth portion
  • a retaining ring is further provided on the outer wall of the central shaft, and the retaining ring is located between the mounting tooth portion and the sensing tooth portion.
  • the electric bicycle according to the second embodiment of the present application includes the torque and speed sensing device according to the first embodiment of the present application.
  • FIG1 is a schematic cross-sectional view of a torque and speed sensor device according to some embodiments of the present application.
  • Fig. 2 is an enlarged view of point A in Fig. 1;
  • FIG3 is a schematic diagram of the exploded structure of a torque and speed sensor device according to some embodiments of the present application.
  • FIG4 is a schematic diagram of the three-dimensional structure of the central axis of some embodiments of the present application.
  • FIG5 is a schematic diagram of the exploded structure of a mounting frame, a signal processing circuit board, a speed sensor, and a torque sensor according to some embodiments of the present application;
  • FIG6 is a schematic diagram of a three-dimensional structure of a connector according to some embodiments of the present application.
  • FIG7 is a schematic diagram of a three-dimensional structure of a deformation member in some embodiments of the present application.
  • FIG. 8 is a schematic diagram of the three-dimensional structure of the first mounting base in some embodiments of the present application.
  • Deformation member 300 matching tooth portion 310; boss 320; connecting tooth portion 330;
  • Signal processing circuit board 500 signal line 510;
  • Torque sensor 800 induction coil 810; connecting wire 820; shielding member 830;
  • the bottom bracket 900 The bottom bracket 900 ; the first mounting seat 910 ; the slot 911 ; the second mounting seat 920 ; the first bearing 930 ; and the second bearing 940 .
  • “several” means one or more, “more” means more than two, “greater than”, “less than”, “exceed”, etc. are understood to exclude the number itself, and “above”, “below”, “within”, etc. are understood to include the number itself. If there is a description of "first” or “second”, it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
  • the wheel hub motor drive system has a certain market share in the power-assisted electric bicycle industry due to its price advantage and the advantages of easy modification.
  • How the power drive of the wheel hub motor can be coordinated with human power to enable users to obtain a comfortable riding experience has always been the goal pursued by power-assisted electric bicycle practitioners, and human power signal acquisition is crucial to the basis of drive control.
  • One of the advantages of electric bicycle hub motors is that they require little modification to traditional bicycles and are easy to modify.
  • the power of the left and right pedals of traditional bicycles is first gathered on the central axis. Therefore, how to achieve signal acquisition in the space where the central axis of a traditional bicycle is installed and how to minimize the modification of the traditional bicycle is one of the difficulties in the design of power-assisted electric bicycle drive components.
  • the existing products on the market use a radially magnetized speed magnetic ring on the central shaft for speed and steering sensing.
  • the speed sensor is placed at the corresponding position of the magnetic ring.
  • the speed sensor senses the change in the magnetic field when the speed magnetic ring rotates to determine the speed and steering of the central shaft.
  • the problems with this solution are: 1. The more pole pairs the speed magnetic ring has, the higher the accuracy. However, the spatial diameter is small and the magnetization width is limited, resulting in the number of pole pairs generally being only 16 pairs; 2.
  • the induction of the torque sensor relies on electricity or magnetism.
  • the speed magnetic ring has a magnetic field and is close to the deformable part, which can easily interfere with the signal of the torque sensor and reduce the accuracy of the torque sensor.
  • the present application proposes a torque and speed sensor device, which can obtain higher sensing accuracy and is simpler to manufacture.
  • a torque and speed sensing device provided by the first embodiment of the present application includes a central axis 100, a connecting member 200, a deformable member 300, a mounting frame 400, a signal processing circuit board 500, a speed sensor 600, a permanent magnet 700 and a torque sensor 800.
  • the frame of the power-assisted electric bicycle is provided with a five-way tube 900, the central axis 100 is arranged in the five-way tube 900 and can rotate in the five-way tube 900, and the two ends of the central axis 100 are connected to the pedals, so when the user steps on the pedals, the pedaling power will be input into the central axis 100.
  • the outer wall of the central axis 100 is provided with a sensing tooth portion 110, and the sensing tooth portion 110 includes a plurality of teeth, and the plurality of teeth are evenly distributed along the circumference of the outer wall of the central axis 100, and there is a gap between adjacent teeth.
  • the connecting member 200 is sleeved on the outer periphery of the middle shaft 100 and is coaxially clearance-matched with the middle shaft 100.
  • the connecting member 200 is connected to the toothed disc to transmit power to the toothed disc, and the toothed disc then drives the wheel to rotate through the transmission mechanism.
  • the deformable member 300 is fixedly connected to the central axis 100, and the other end is fixedly connected to the connecting member 200, so as to transmit the power of the central axis 100 to the connecting member 200.
  • the deformable member 300 is roughly in a cylindrical structure, and one end of the deformable member 300 can be sleeved and fixed on the outer wall of the central axis 100, and the other end can be coaxially fitted with the central axis 100, and the connecting member 200 can be sleeved and fixed on the outer wall of the other end of the deformable member 300.
  • the deformable member 300 will be subjected to a large torque in the process of transmitting power, and will also produce a certain deformation, so the deformable member 300 can be made of a metal material with high strength and certain elasticity, such as aluminum alloy or steel.
  • the mounting frame 400 is fixedly arranged in the five-way tube 900, and the mounting frame 400 is sleeved on the outer periphery of the deformable member 300.
  • the signal processing circuit board 500 is installed on the side of the mounting frame 400 away from the middle shaft 100.
  • the signal processing circuit board 500 is provided with a signal line 510, and the signal line 510 is connected to the controller of the hub motor.
  • the speed sensor 600 is installed on the signal processing circuit board 500, and the speed sensor 600 is arranged opposite to the sensing tooth part 110 of the middle shaft 100.
  • the permanent magnet 700 is installed on the side of the signal processing circuit board 500 away from the speed sensor 600.
  • the speed sensor 600 is used to sense the magnetic field change of the permanent magnet 700 to transmit the speed signal to the signal processing circuit board 500.
  • the induction tooth portion 110 rotates along with the central axis 100. Since magnetic flux lines preferentially pass through materials with high magnetic permeability, the rotation of multiple teeth of the induction tooth portion 110 will drive the magnetic flux lines to move, thereby causing the magnetic field of the permanent magnet 700 to change.
  • the speed sensor 600 can sense the change and output a corresponding speed signal.
  • the torque sensor 800 is mounted on the mounting frame 400 and can sense the deformation of the deformable member 300 to transmit a torque signal to the signal processing circuit board 500. Specifically, the torque sensor 800 is located outside the middle of the deformable member 300, so that the degree of distortion of the deformable member 300 can be sensed more sensitively.
  • the pedal When the user steps on the pedal, the pedal inputs power to the middle shaft 100 to make the middle shaft 100 rotate.
  • the multiple teeth of the induction tooth part 110 that rotates with the middle shaft 100 can cause the magnetic field of the permanent magnet 700 to change.
  • the speed sensor 600 can sense the change of the magnetic field and generate a speed signal, and then transmit the speed signal to the signal processing circuit board 500 for processing to obtain the rotation speed and rotation direction of the middle shaft 100.
  • the power of the middle shaft 100 is transmitted to the connecting member 200 through the deformable member 300, and then transmitted to the connecting member 200 through the connecting member 200.
  • the deformable member 300 will deform in the process of transmitting power, and the torque sensor 800 can sense the deformation of the deformable member 300 to generate a torque signal, and then transmit the torque signal to the signal processing circuit board 500 for processing to obtain the torque of the power input to the middle shaft 100.
  • the signal processing circuit board 500 will send the speed signal and the torque signal to the controller of the hub motor after preliminary processing.
  • the controller controls the hub motor to output appropriate power to cooperate with human power to drive the vehicle, so that the user can get a comfortable riding feeling.
  • the present application sets a sensing tooth portion 110 on the central axis 100. On the one hand, the processing of the teeth is simpler and the processing difficulty is reduced.
  • the tooth density can be set higher, which is beneficial to improving the sensing accuracy of the speed sensor 600.
  • the permanent magnet 700 since the permanent magnet 700 is installed on the mounting frame 400, it can be farther away from the deformable part 300 compared with the existing technology, reducing the magnetization effect of the permanent magnet 700 on the deformable part 300 and reducing interference with the torque sensor 800, which is beneficial to improving the sensing accuracy of the torque sensor 800.
  • the speed and torque sensor device further includes a shielding member 830, which is disposed on the outer periphery of the torque sensor 800, thereby isolating the external electromagnetic signal interference and improving the sensing accuracy of the torque sensor 800.
  • the shielding member 830 is made of metal material, for example, the shielding member 830 may be composed of a metal shell or a metal wire mesh, which can play a good shielding role.
  • the outer wall of the mounting frame 400 is provided with two protrusions, and the two protrusions are located on the outer sides of the axial ends of the torque sensor 800.
  • the two protrusions can play a role in limiting the axial movement of the shielding member 830, thereby preventing the shielding member 830 from axial movement, which is conducive to improving the shielding effect of the shielding member 830 on the torque sensor 800.
  • the structures of the two protrusions can be the same or different.
  • one of the protrusions is a convex ring structure 440
  • the other protrusion is an undercut structure 430.
  • the undercut structure 430 has an inclined surface on the side away from the convex ring structure 440 to facilitate the introduction of the shielding member 830.
  • the shielding member 830 can be moved from the inverted structure 430 toward the convex ring structure 440 and sleeved on the outer periphery of the torque sensor 800.
  • the shielding member 830 moves between the inverted structure 430 and the convex ring structure 440, the shielding member 830 will be limited by the inverted structure 430 and the convex ring structure 440 and cannot move axially.
  • the torque sensor 800 includes two induction coils 810 , and the outer wall of the mounting frame 400 is provided with two annular grooves 450 , and the two induction coils 810 are wound and installed in the corresponding annular grooves 450 , thereby making the installation of the induction coils 810 more secure and preventing the induction coils 810 from shaking easily and affecting the sensing accuracy of the deformation of the deformable member 300 .
  • the torque sensor 800 also includes a connecting wire 820, the induction coil 810 is connected to the signal processing circuit board 500 through the connecting wire 820, and the outer wall of the mounting frame 400 is provided with an avoidance groove 460, and the connecting wire 820 is accommodated in the avoidance groove 460, so as to avoid the connecting wire 820 protruding from the outer wall of the mounting frame 400, which is beneficial to improve the installation stability of the connecting wire 820, and at the same time reduce the influence of the outside world on the connecting wire 820, so as to further improve the sensing accuracy of the torque sensor 800.
  • the mounting frame 400 is provided with a groove 410, and the speed sensor 600 is embedded in the groove 410, so that the speed sensor 600 and the permanent magnet 700 are closer to the sensing tooth portion 110, so that when the sensing tooth portion 110 rotates, it is easier to cause the magnetic field of the permanent magnet 700 to change, which is beneficial to improve the sensing accuracy of the speed sensor 600.
  • the torque and speed sensor device further includes a first mounting seat 910, a second mounting seat 920, a first bearing 930 and a second bearing 940.
  • the first mounting seat 910 and the second mounting seat 920 are mounted on both ends of the bottom bracket tube 900 in the axial direction.
  • the middle shaft 100 is rotatably mounted on the first mounting seat 910 through the first bearing 930
  • the connecting member 200 is rotatably mounted on the second mounting seat 920 through the second bearing 940.
  • the first mounting seat 910 can be fixedly mounted on one end of the bottom bracket tube 900 in the axial direction by means of threaded connection or interference fit
  • the second mounting seat 920 can be fixedly mounted on the other end of the bottom bracket tube 900 in the axial direction by means of threaded connection or interference fit.
  • the first mounting seat 910 is a hollow structure
  • the outer ring of the first bearing 930 is fixedly connected to the inner wall of the first mounting seat 910
  • the inner ring of the first bearing 930 is sleeved and fixed to the outer wall of the middle shaft 100, so that the middle shaft 100 can be installed in the bottom bracket 900 through the first bearing 930 and can rotate smoothly.
  • the second mounting seat 920 is a hollow structure, the outer ring of the second bearing 940 is fixedly connected to the inner wall of the second mounting seat 920, and the inner ring of the second bearing 940 is fixedly sleeved to the outer wall of the connecting member 200, so that the connecting member 200 can rotate smoothly through the second bearing 940.
  • a first raceway that matches may be provided on the outer wall of the central axis 100 and the inner wall of the first mounting seat 910, and a ball may be installed in the first raceway, so that the central axis 100 can be rotatably installed in the first mounting seat 910.
  • a second raceway that matches may be provided on the outer wall of the connecting member 200 and the inner wall of the second mounting seat 920, and a ball may be installed in the second raceway, so that the connecting member 200 can be rotatably installed in the second mounting seat 920.
  • the inner wall of the first mounting seat 910 is provided with a slot 911
  • the outer wall of the mounting frame 400 is provided with a rib 420
  • the slot 911 and the rib 420 are both arranged along the axial direction of the bottom bracket 900
  • the mounting frame 400 is mounted on the first mounting seat 910 by the rib 420 being engaged with the slot 911, so that the mounting frame 400 can be fixed in the circumferential direction, thereby preventing the mounting frame 400 from rotating relative to the bottom bracket 900 and affecting the normal operation of the related components installed thereon.
  • the mounting frame 400 can be more firmly fixed in the circumferential direction in the bottom bracket 900 by the multiple ribs 420 being respectively engaged in the corresponding slots 911.
  • the mounting frame 400 may also be fixedly connected to the inner wall of the bottom bracket 900 , or the mounting frame 400 may be fixedly connected to the second mounting seat 920 .
  • a boss 320 is provided on the outer wall of the end of the deformable member 300 away from the speed sensor 600, and a limiter is installed on the outer wall of the end of the central axis 100 away from the torque sensor 800, and the mounting frame 400 is clamped between the boss 320 and the limiter, so that the boss 320 and the limiter can play a role in blocking the mounting frame 400 and preventing the mounting frame 400 from moving in the axial direction.
  • the limiter can be a structure such as a retaining spring or a shaft sleeve, which can well prevent the mounting frame 400 from moving in the axial direction.
  • the outer wall of the central axis 100 is provided with a mounting tooth portion 120, the mounting tooth portion 120 includes a plurality of teeth uniformly distributed in the circumferential direction, and the inner wall of the deformable member 300 is provided with a matching tooth portion 310 that matches the mounting tooth portion 120, the matching tooth portion 310 includes a plurality of matching teeth uniformly distributed in the circumferential direction.
  • the matching tooth portion 310 When installing, the matching tooth portion 310 is sleeved on the outer periphery of the mounting tooth portion 120, so that the deformable member 300 is clamped and fixed to the outer wall of the central axis 100. At the same time, through the cooperation of the teeth, the power transmission between the central axis 100 and the deformable member 300 is more reliable, and the slipping of the deformable member 300 relative to the central axis 100 when the power is too large is reduced. Similarly, a similar structure can also be used between the deformable member 300 and the connecting member 200 to achieve reliable power transmission.
  • the outer wall of the end of the deformable member 300 away from the mating tooth portion 310 is provided with a connecting tooth portion 330
  • the inner wall of one end of the connecting member 200 is provided with a mating connecting portion 210.
  • the mating connecting portion 210 is sleeved on the connecting tooth portion 330, so that the connecting member 200 is fixedly connected to the deformable member 300.
  • power is transmitted between the two through the cooperation of teeth, making the power transmission more reliable.
  • a retaining ring 130 is further provided on the outer wall of the central axis 100.
  • the retaining ring 130 is located between the mounting tooth portion 120 and the sensing tooth portion 110.
  • the retaining ring 130 can prevent the deformable member 300 from moving axially.
  • a limiting structure such as a retaining spring can also be fixedly installed on the outer wall of the central axis 100.
  • the retaining spring is located on the side of the deformable member 300 away from the retaining ring 130, thereby limiting the axial movement of the deformable member 300 through the cooperation of the retaining spring and the retaining ring 130.
  • the electric bicycle of the second embodiment of the present application comprises a frame, a wheel, a hub motor and a torque and speed sensing device of the first embodiment of the present application.
  • the frame is provided with a five-way pipe 900
  • the torque and speed sensing device is installed in the five-way pipe 900
  • the wheel is rotatably installed on the frame
  • the housing of the hub motor is fixedly connected to the wheel.
  • the torque and speed sensing device sends the collected speed, steering and torque information of the middle shaft 100 to the controller, and the controller controls the hub motor to output appropriate power according to the above information, so as to drive the wheel to rotate in coordination with the power of the user's pedaling to achieve a good power-assisting effect, so that the user can obtain a comfortable riding feeling.
  • the electric bicycle adopts the torque and speed sensing device of the first embodiment of the present application
  • the pedal inputs power into the middle shaft 100 to rotate the middle shaft 100
  • the multiple teeth of the sensing tooth portion 110 that rotates with the middle shaft 100 can cause the magnetic field of the permanent magnet 700 to change
  • the speed sensor 600 can sense the change of the magnetic field to generate a speed signal, and then transmit the speed signal to the signal processing circuit board 500 for processing to obtain the rotation speed and rotation direction of the middle shaft 100.
  • the middle shaft 100 rotates, the power of the middle shaft 100 is transmitted to the connecting member 2 through the deformable member 300.
  • the deformable piece 300 will be deformed in the process of transmitting power
  • the torque sensor 800 can sense the deformation of the deformable piece 300 and generate a torque signal
  • the torque signal is transmitted to the signal processing circuit board 500 for processing to obtain the torque of the power input to the middle shaft 100
  • the signal processing circuit board 500 will send the speed signal and torque signal to the controller of the hub motor after preliminary processing, and the controller will then control the hub motor to output appropriate power to cooperate with human power to drive the vehicle, so that the user can get a comfortable riding feeling.
  • the present application sets a sensing tooth portion 110 on the central axis 100.
  • the processing of the teeth is simpler and the processing difficulty is reduced.
  • the tooth density can be set higher, which is beneficial to improving the sensing accuracy of the speed sensor 600.
  • the permanent magnet 700 since the permanent magnet 700 is installed on the mounting frame 400 and away from the deformable member 300, the magnetization effect of the permanent magnet 700 on the deformable member 300 can be reduced, and the interference with the torque sensor 800 can be reduced, which is beneficial to improving the sensing accuracy of the torque sensor 800.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

一种力矩及速度传感装置及电动自行车，其中力矩及速度传感装置包括中轴(100)、连接件(200)、变形件(300)、安装架(400)、信号处理线路板(500)、速度感应器(600)、永磁体(700)和力矩感应器(800)。中轴(100)外壁设置有感应齿部(110)。变形件(300)一端固定连接中轴(100)，另一端固定与连接件(200)相连。安装架(400)固定设置于五通管(900)内并套设于变形件(300)的外周，信号处理线路板(500)安装在安装架(400)上，速度感应器(600)安装在信号处理线路板(500)上，并与感应齿部(110)相对设置。永磁体(700)安装于信号处理线路板(500)背离速度感应器(600)的一侧，力矩感应器(800)安装于安装架(400)上。

Description

力矩及速度传感装置及电动自行车
相关申请的交叉引用
本申请要求于2022年09月29日提交的申请号为202211198968.0、名称为“力矩及速度传感装置及电动自行车”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电动自行车技术领域，特别涉及一种力矩及速度传感装置及电动自行车。
 背景技术
相关技术中，轮毂电机驱动系统因具有价格优势及改装简便的优点，而在助力电动自行车行业占有一定的市场。轮毂电机的动力驱动如何与人力配合才能使用户获得舒适的骑行感，一直是助力电动自行车从业者追求的目标，而人力的信号采集对驱动控制的依据至关重要。电动自行车轮毂电机的优势之一是对传统自行车的改动小、改装简单，同时传统自行车左右脚踏的动力最早汇集的地方在中轴上，因此如何做到在传统自行车中轴安装的空间实现信号采集且对传统自行车改装最小是助力电动自行车驱动部件设计的难点之一。
发明内容
本申请旨在至少解决现有技术中存在的技术问题之一。为此，本申请提出一种力矩及速度传感装置。
本申请另外还提供一种具有上述力矩及速度传感装置的电动自行车。
根据本申请第一方面实施例的力矩及速度传感装置，包括：
中轴，转动设置于五通管内，所述中轴的外壁设置有感应齿部，所述感应齿部包括沿所述中轴的外壁周向均布的多个齿；
连接件，套设于所述中轴的外周，用于将动力传输至牙盘；
变形件，一端固定连接所述中轴，另一端固定连接所述连接件；
安装架，固定设置于所述五通管内并套设于所述变形件的外周；
信号处理线路板，安装于所述安装架；
速度感应器，安装于所述信号处理线路板，并与所述感应齿部相对设置；
永磁体，安装于所述信号处理线路板背离所述速度感应器的一侧，所述速度感应器用于感应所述永磁体的磁场变化，以输送速度信号至所述信号处理线路板；以及
力矩感应器，安装于所述安装架，用于感应所述变形件的形变，以输送力矩信号至所述信号处理线路板。
根据本申请的一些实施例，所述力矩及速度传感装置还包括屏蔽件，所述屏蔽件罩设于所述力矩感应器的外周。
根据本申请的一些实施例，所述安装架的外壁设置有位于所述力矩感应器轴向两端的凸起，所述屏蔽件卡设于两个所述凸起之间。
根据本申请的一些实施例，所述力矩感应器包括两个感应线圈，所述安装架的外壁设置有两个环形槽，两个所述感应线圈安装于相应的所述环形槽内。
根据本申请的一些实施例，所述力矩感应器还包括连接线，所述感应线圈通过所述连接线与所述信号处理线路板连接，所述安装架的外壁设置有用于避让所述连接线的避让槽。
根据本申请的一些实施例，所述安装架设置有凹槽，所述速度感应器嵌入于所述凹槽内。
根据本申请的一些实施例，还包括第一安装座和第二安装座，所述第一安装座和所述第二安装座安装于所述五通管沿轴向的两端，所述中轴通过第一轴承转动安装于所述第一安装座，所述连接件通过第二轴承转动安装于所述第二安装座。
根据本申请的一些实施例，所述第一安装座的内壁设置有卡槽，所述安装架的外壁设置有凸筋，所述安装架通过所述凸筋卡接于所述卡槽而周向固定于所述第一安装座。
根据本申请的一些实施例，所述变形件的外壁设置有凸台，所述中轴的外壁安装有限位件，所述安装架卡设于所述凸台和所述限位件之间。
根据本申请的一些实施例，所述中轴的外壁设置有安装齿部，所述变形件的内壁设置有与所述安装齿部配合的配合齿部。
根据本申请的一些实施例，所述中轴的外壁还设置有挡环，所述挡环位于所述安装齿部和所述感应齿部之间。
根据本申请第二方面实施例的电动自行车，包括本申请第一方面实施例的力矩及速度传感装置。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
 附图说明
图1是本申请一些实施例的力矩及速度传感装置的剖视结构示意图；
图2是图1中的A处放大图；
图3是本申请一些实施例的力矩及速度传感装置的分解结构示意图；
图4是本申请一些实施例的中轴的立体结构示意图；
图5是本申请一些实施例的安装架、信号处理线路板、速度感应器和力矩感应器的分解结构示意图；
图6是本申请一些实施例的连接件的立体结构示意图；
图7是本申请一些实施例的变形件的立体结构示意图；
图8是本申请一些实施例的第一安装座的立体结构示意图。
附图标记：
中轴100；感应齿部110；安装齿部120；挡环130；
连接件200；配合连接部210；
变形件300；配合齿部310；凸台320；连接齿部330；
安装架400；凹槽410；凸筋420；倒扣结构430；凸环结构440；环形槽450；避让槽460；
信号处理线路板500；信号线510；
速度感应器600；
永磁体700；
力矩感应器800；感应线圈810；连接线820；屏蔽件830；
五通管900；第一安装座910；卡槽911；第二安装座920；第一轴承930；第二轴承940。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，涉及到方位描述，例如上、下、前、后、左、右等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
在本申请的描述中，若干的含义是一个或者多个，多个的含义是两个以上，大于、小于、超过等理解为不包括本数，以上、以下、以内等理解为包括本数。如果有描述到第一、第二只是用于区分技术特征为目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量或者隐含指明所指示的技术特征的先后关系。
本申请的描述中，除非另有明确的限定，设置、安装、连接、装配、配合等词语应做广义理解，所属技术领域技术人员可以接合技术方案的具体内容合理确定上述词语在本申请中的具体含义。
相关技术中，轮毂电机驱动系统因具有价格优势及改装简便的优点，而在助力电动自行车行业占有一定的市场。轮毂电机的动力驱动如何与人力配合才能使用户获得舒适的骑行感，一直是助力电动自行车从业者追求的目标，而人力的信号采集对驱动控制的依据至关重要。电动自行车轮毂电机的优势之一是对传统自行车的改动小、改装简单，同时传统自行车左右脚踏的动力最早汇集的地方在中轴上，因此如何做到在传统自行车中轴安装的空间实现信号采集且对传统自行车改装最小是助力电动自行车驱动部件设计的难点之一。
目前，市场上现有的产品，转速和转向感应的方案采用的是在中轴上安装一个径向充磁的速度磁环，磁环对应的位置放置速度感应器，中轴受力转动时带动速度磁环同步转动，速度感应器感应速度磁环转动时的磁场变化判断中轴的转速和转向。这种方案存在的问题：1、速度磁环的极对数越多精度越高。但是空间直径较小，充磁宽度又有限制，导致极对数一般只能做到16对极；2、力矩传感器的感应依托电或磁，速度磁环存在磁场，且与变形件距离较近，容易干扰力矩传感器的信号，降低了力矩传感器的精度。
为了解决上述的至少一个技术问题，本申请提出一种力矩及速度传感装置，其能够获得较高的感应精度，同时加工更简单。
参照图1至图3，本申请第一方面实施例提供的一种力矩及速度传感装置，包括中轴100、连接件200、变形件300、安装架400、信号处理线路板500、速度感应器600、永磁体700和力矩感应器800。助力电动自行车的车架设置有五通管900，中轴100设置于五通管900内并能够在五通管900内转动，中轴100的两端连接脚踏板，因此用户在踩踏脚踏板的时候，踩踏的动力将输入中轴100。中轴100的外壁设置有感应齿部110，感应齿部110包括多个齿，多个齿沿着中轴100的外壁周向均布，相邻的齿与齿之间具有间隙。
连接件200套设于中轴100的外周，并与中轴100同轴间隙配合。连接件200与牙盘连接，用于将动力传输至牙盘，牙盘再通过传动机构带动车轮转动。
变形件300的一端与中轴100固定连接，另一端与连接件200固定连接，起到将中轴100的动力传递至连接件200的作用。例如，变形件300大致呈筒体结构，可以将变形件300的一端套接固定于中轴100的外壁，另一端与中轴100同轴间隙配合，连接件200套接固定于变形件300的另一端的外壁。变形件300在传递动力的过程中会受到较大的扭矩，同时会产生一定的形变，因此变形件300可以采用具有较高强度和一定弹性的金属材料制成，例如可以采用铝合金或者钢材制成。
安装架400固定设置于五通管900内，且安装架400套设于变形件300的外周。信号处理线路板500安装于安装架400背离中轴100的一侧，信号处理线路板500设置有信号线510，信号线510与轮毂电机的控制器连接。速度感应器600安装于信号处理线路板500上，且速度感应器600与中轴100的感应齿部110相对设置。永磁体700安装于信号处理线路板500背离速度感应器600的一侧，速度感应器600用于感应永磁体700的磁场变化，以输送速度信号至信号处理线路板500。具体的，中轴100转动时，感应齿部110跟随中轴100转动，由于磁感线会优先通过磁导率高的材料，因此感应齿部110的多个齿转动时会带动磁感线移动，从而使得永磁体700的磁场发生变化，速度感应器600能够感应到该变化而输出相应的速度信号。
力矩感应器800安装于安装架400，力矩感应器800能够感应变形件300的形变，以输送力矩信号至信号处理线路板500。具体的，力矩感应器800位于变形件300的中部位置的外侧，从而可以更为灵敏地感应变形件300的扭曲变形程度。
用户踩踏踏板时，踏板将动力输入中轴100使得中轴100旋转，跟随中轴100旋转的感应齿部110的多个齿能够引起永磁体700的磁场发生变化，速度感应器600能够感应磁场的变化而产生速度信号，然后将速度信号输送至信号处理线路板500进行处理以获得中轴100的旋转速度和旋转方向，同时中轴100旋转时，中轴100的动力通过变形件300输送至连接件200，然后再通过连接件200输送至牙盘以带动车轮转动，变形件300在输送动力的过程中会产生形变，力矩感应器800能够感应变形件300的形变而产生力矩信号，然后将力矩信号输送至信号处理线路板500进行处理以获得输入中轴100的动力的力矩大小，信号处理线路板500将速度信号和力矩信号初步处理后发送至轮毂电机的控制器，控制器再控制轮毂电机输出合适的动力以配合人力驱动车辆行驶，从而使得用户能够获得舒适的骑行感。相对现有的力矩及速度传感器，本申请通过在中轴100设置感应齿部110，一方面齿的加工更简单，降低加工的难度，另一方面齿数密度能够设置更高，从而有利于提高速度感应器600的感应精度，同时由于永磁体700安装于安装架400上，因此能够相对现有的技术更为远离变形件300，减少永磁体700对变形件300的磁化影响，减少对力矩感应器800的干扰，从而有利于提高力矩感应器800的感应精度。
可以理解的是，为了降低外界信号对力矩感应器800的干扰，参照图1和图5，在本申请的一些实施例中，该速度及力矩传感装置还包括屏蔽件830，屏蔽件830罩设于力矩感应器800的外周，从而可以隔绝外界的电磁信号干扰，提高力矩感应器800的感应精度。具体的，屏蔽件830采用金属材料制成，例如屏蔽件830可以是金属壳体或者金属丝网构成，能够起到良好的屏蔽作用。
可以理解的是，为了将屏蔽件830限位于安装架400上，参照图5，在本申请的一些实施例中，安装架400的外壁设置有两个凸起，两个凸起位于力矩感应器800轴向两端的外侧，屏蔽件830罩设于力矩感应器800的外周时，两个凸起能够起到限制屏蔽件830沿轴向移动的作用，从而可以防止屏蔽件830沿轴向窜动，有利于提高屏蔽件830对力矩感应器800的屏蔽效果。当然，两个凸起的结构可以相同，也可以不同，例如，其中一个凸起为凸环结构440，另一个凸起为倒扣结构430，倒扣结构430远离凸环结构440的一侧具有便于屏蔽件830导入的斜面。安装屏蔽件830时，可以将屏蔽件830由倒扣结构430朝向凸环结构440的方向移动而套接于力矩感应器800的外周，当屏蔽件830移动至倒扣结构430和凸环结构440之间时，屏蔽件830将被倒扣结构430和凸环结构440限位而无法轴向移动。
需要说明的是，在本申请的一些实施例中，参照图5，力矩感应器800包括两个感应线圈810，安装架400的外壁设置有两个环形槽450，两个感应线圈810绕设安装于相应的环形槽450内，从而使得感应线圈810的安装更加牢固，防止感应线圈810容易晃动而影响对变形件300形变的感应精度。
可以理解的是，在本申请的一些实施例中，参照图5，力矩感应器800还包括连接线820，感应线圈810通过连接线820与信号处理线路板500连接，安装架400的外壁设置有避让槽460，连接线820容置于避让槽460内，从而可以避免连接线820凸出于安装架400的外壁，有利于提高连接线820的安装稳固性，同时减少外界对连接线820的影响，从而有利于进一步提高力矩感应器800的感应精度。
可以理解的是，在本申请的一些实施例中，参照图2，安装架400设置有凹槽410，速度感应器600嵌入于凹槽410内，从而使得速度感应器600和永磁体700更为靠近感应齿部110，使得感应齿部110旋转时能够更容易引起永磁体700的磁场变化，从而有利于提高速度感应器600的感应精度。
可以理解的是，为了方便安装中轴100和连接件200，在本申请的一些实施例中，参照图1，力矩及速度传感装置还包括第一安装座910、第二安装座920、第一轴承930和第二轴承940，第一安装座910和第二安装座920安装于五通管900沿轴向的两端，中轴100通过第一轴承930转动安装于第一安装座910，连接件200通过第二轴承940转动安装于第二安装座920。具体的，第一安装座910可以通过螺纹连接或者过盈配合的方式固定安装于五通管900沿轴向的一端，第二安装座920可以通过螺纹连接或者过盈配合的方式固定安装于五通管900沿轴向的另一端。第一安装座910为中空结构，第一轴承930的外圈固定连接于第一安装座910的内壁，第一轴承930的内圈套接固定于中轴100的外壁，因此中轴100能够通过第一轴承930安装于五通管900内，并能够实现顺畅地转动。第二安装座920为中空结构，第二轴承940的外圈固定连接于第二安装座920的内壁，第二轴承940的内圈固定套接于连接件200的外壁，从而使得连接件200能够通过第二轴承940实现顺畅地转动。
当然，还可以在中轴100的外壁和第一安装座910的内壁设置有相配合的第一滚道，第一滚道内安装有滚珠，从而使得中轴100可以转动安装于第一安装座910内。类似的，连接件200的外壁和第二安装座920的内壁也可以设置有相配合的第二滚道，第二滚道内安装有滚珠，从而使得连接件200能够转动安装于第二安装座920内。
可以理解的是，为了能够将安装架400沿周向固定设置于五通管900内，参照图5和图8，在本申请的一些实施例中，第一安装座910的内壁设置有卡槽911，安装架400的外壁设置有凸筋420，卡槽911和凸筋420均沿五通管900的轴向设置，安装架400通过凸筋420卡接于卡槽911而安装于第一安装座910，从而使得安装架400能够实现周向的固定，从而可以防止安装架400相对五通管900转动而影响安装在其上的相关部件的正常工作。当然，卡槽911可以设置有多个，多个卡槽911沿周向间隔分布设置，凸筋420也可以设置有多个，多个凸筋420沿周向间隔分布设置，从而通过多个凸筋420分别卡入对应的卡槽911内，使得安装架400能够更为稳固地周向固定在五通管900内。当然，还可以将安装架400固定连接于五通管900的内壁，或者将安装架400固定连接于第二安装座920。
可以理解的是，为了能够在轴向上限位安装架400，防止安装架400沿轴向窜动，在本申请的一些实施例中，参照图1和图7，变形件300远离速度感应器600的一端的外壁设置有凸台320，中轴100远离力矩感应器800的一端的外壁安装有限位件，安装架400卡设于凸台320和限位件之间，从而使得凸台320和限位件可以起到阻挡安装架400的作用，防止安装架400沿轴向窜动。具体的，限位件可以是卡簧或者轴套等结构，其能够很好地阻挡安装架400沿轴向移动。
可以理解的是，为了能够将中轴100的动力更可靠地传递至变形件300，在本申请的一些实施例中，参照图4和图7，中轴100的外壁设置有安装齿部120，安装齿部120包括多个周向均布的齿，变形件300的内壁设置有与安装齿部120配合的配合齿部310，配合齿部310包括多个沿周向均布的配合齿，安装时，将配合齿部310套于安装齿部120的外周，使得变形件300卡接固定于中轴100的外壁，同时通过齿和齿的配合，使得中轴100和变形件300之间的动力传递更可靠，减少动力过大时变形件300相对中轴100打滑的状况。类似的，变形件300与连接件200之间也可以采用相似的结构实现动力的可靠传递。例如，参照图6和图7，变形件300远离配合齿部310的一端的外壁设置有连接齿部330，连接件200一端的内壁设置有配合连接部210，配合连接部210套接于连接齿部330，从而使得连接件200固定连接于变形件300，同时两者之间通过齿和齿的配合传递动力，使得动力的传递更可靠。
需要说明的是，为了防止变形件300沿轴向移动，在本申请的一些实施例，参照图1和图4，中轴100的外壁还设置有挡环130，挡环130位于安装齿部120和感应齿部110之间，挡环130可以起到阻挡变形件300轴向移动的作用，当然，还可以在中轴100的外壁上固定安装卡簧等限位结构，卡簧位于变形件300远离挡环130的一侧，从而通过卡簧和挡环130的配合限制变形件300的轴向移动。
本申请第二方面实施例的电动自行车，包括车架、车轮、轮毂电机以及本申请第一方面实施例的力矩及速度传感装置。车架设置有五通管900，力矩及速度传感装置安装于五通管900内，车轮可转动安装于车架，轮毂电机的机壳与车轮固定连接。力矩及速度传感装置将采集到的中轴100的转速、转向和力矩信息发送给控制器，控制器根据上述信息控制轮毂电机输出合适的动力，以配合用户踩踏的动力驱使车轮转动而实现良好的助力效果，从而使得用户能够获得舒适的骑行感。
该电动自行车由于采用本申请第一方面实施例的力矩及速度传感装置，当用户踩踏踏板时，踏板将动力输入中轴100使得中轴100旋转，跟随中轴100旋转的感应齿部110的多个齿能够引起永磁体700的磁场发生变化，速度感应器600能够感应磁场的变化而产生速度信号，然后将速度信号输送至信号处理线路板500进行处理以获得中轴100的旋转速度和旋转方向，同时中轴100旋转时，中轴100的动力通过变形件300输送至连接件200，然后再通过连接件200输送至牙盘以带动车轮转动，变形件300在输送动力的过程中会产生形变，力矩感应器800能够感应变形件300的形变而产生力矩信号，然后将力矩信号输送至信号处理线路板500进行处理以获得输入中轴100的动力的力矩大小，信号处理线路板500将速度信号和力矩信号初步处理后发送至轮毂电机的控制器，控制器再控制轮毂电机输出合适的动力以配合人力驱动车辆行驶，从而使得用户能够获得舒适的骑行感。相对现有的力矩及速度传感器，本申请通过在中轴100设置感应齿部110，一方面齿的加工更简单，降低加工的难度，另一方面齿数密度能够设置更高，从而有利于提高速度感应器600的感应精度，同时由于永磁体700安装于安装架400上而远离变形件300，能够减少永磁体700对变形件300的磁化影响，减少对力矩感应器800的干扰，从而有利于提高力矩感应器800的感应精度。
上面接合附图对本申请实施例作了详细说明，但是本申请不限于上述实施例，在所属技术领域普通技术人员所具备的知识范围内，还可以在不脱离本申请宗旨的前提下作出各种变化。

Claims (12)

  1. 力矩及速度传感装置，包括：
    中轴，转动设置于五通管内，所述中轴设置有感应齿部，所述感应齿部包括沿所述中轴的外壁周向均布的多个齿；
    连接件，套设于所述中轴的外周，用于将动力传输至牙盘；
    变形件，一端固定连接所述中轴，另一端固定连接所述连接件；
    安装架，固定设置于所述五通管内并套设于所述变形件的外周；
    信号处理线路板，安装于所述安装架；
    速度感应器，安装于所述信号处理线路板，并与所述感应齿部相对设置；
    永磁体，安装于所述信号处理线路板背离所述速度感应器的一侧，所述速度感应器用于感应所述永磁体的磁场变化，以输送速度信号至所述信号处理线路板；以及
    力矩感应器，安装于所述安装架，用于感应所述变形件的形变，以输送力矩信号至所述信号处理线路板。
  2. 根据权利要求1所述的力矩及速度传感装置，其中，所述力矩及速度传感装置还包括屏蔽件，所述屏蔽件罩设于所述力矩感应器的外周。
  3. 根据权利要求2所述的力矩及速度传感装置，其中，所述安装架的外壁设置有位于所述力矩感应器轴向两端的凸起，所述屏蔽件卡设于两个所述凸起之间。
  4. 根据权利要求1至3任一项所述的力矩及速度传感装置，其中，所述力矩感应器包括两个感应线圈，所述安装架的外壁设置有两个环形槽，两个所述感应线圈安装于相应的所述环形槽内。
  5. 根据权利要求4所述的力矩及速度传感装置，其中，所述力矩感应器还包括连接线，所述感应线圈通过所述连接线与所述信号处理线路板连接，所述安装架的外壁设置有用于避让所述连接线的避让槽。
  6. 根据权利要求1至5任一项所述的力矩及速度传感装置，其中，所述安装架设置有凹槽，所述速度感应器嵌入于所述凹槽内。
  7. 根据权利要求1至6任一项所述的力矩及速度传感装置，还包括第一安装座和第二安装座，所述第一安装座和所述第二安装座安装于所述五通管沿轴向的两端，所述中轴通过第一轴承转动安装于所述第一安装座，所述连接件通过第二轴承转动安装于所述第二安装座。
  8. 根据权利要求7所述的力矩及速度传感装置，其中，所述第一安装座的内壁设置有卡槽，所述安装架的外壁设置有凸筋，所述安装架通过所述凸筋卡接于所述卡槽而周向固定于所述第一安装座。
  9. 根据权利要求8所述的力矩及速度传感装置，其中，所述变形件的外壁设置有凸台，所述中轴的外壁安装有限位件，所述安装架卡设于所述凸台和所述限位件之间。
  10. 根据权利要求1至9任一项所述的力矩及速度传感装置，其中，所述中轴的外壁设置有安装齿部，所述变形件的内壁设置有与所述安装齿部配合的配合齿部。
  11. 根据权利要求10所述的力矩及速度传感装置，其中，所述中轴的外壁还设置有挡环，所述挡环位于所述安装齿部和所述感应齿部之间。
  12. 电动自行车，包括如权利要求1至11任一项所述的力矩及速度传感装置。
PCT/CN2023/084796 2022-09-29 2023-03-29 力矩及速度传感装置及电动自行车 WO2024066262A1 (zh)

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