CN218055497U - Torque and speed sensing device and electric bicycle - Google Patents
Torque and speed sensing device and electric bicycle Download PDFInfo
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- CN218055497U CN218055497U CN202222617676.8U CN202222617676U CN218055497U CN 218055497 U CN218055497 U CN 218055497U CN 202222617676 U CN202222617676 U CN 202222617676U CN 218055497 U CN218055497 U CN 218055497U
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Abstract
The utility model discloses a moment and speed sensing device and electric bicycle, wherein moment and speed sensing device includes the axis, the connecting piece, the deformation piece, the mounting bracket, the signal processing circuit board, the speed inductor, permanent magnet and moment inductor, the axis rotates and sets up in the five-way pipe, centraxonial outer wall is provided with response tooth portion, centraxonial periphery is located to the connecting piece cover, the speed inductor is installed in the signal processing circuit board, and set up relatively with response tooth portion, moment and speedtransmitter current relatively, this moment and speed sensing device is through setting up response tooth portion at the axis, the processing of side tooth is simpler, reduce the degree of difficulty of processing, on the other hand number of teeth density can set up more highly, thereby be favorable to improving the response precision of speed inductor, simultaneously because the permanent magnet is installed on the mounting bracket and keep away from the deformation piece, can reduce the magnetization influence of permanent magnet to the deformation piece, reduce the interference to the moment inductor, thereby be favorable to improving the response precision of moment inductor.
Description
Technical Field
The utility model relates to an electric bicycle technical field, in particular to moment and speed sensing device and electric bicycle.
Background
In the related art, the hub motor driving system has the advantages of price advantage and simple and convenient modification, and therefore has a certain market in the industry of the power-assisted electric bicycle. How to match the power drive of the hub motor with manpower to ensure that a user can obtain comfortable riding feeling is always a target pursued by a practitioner of the power-assisted electric bicycle, and the signal acquisition of the manpower is very important for the basis of drive control. One of the advantages of the hub motor of the electric bicycle is that the modification of the traditional bicycle is small, the modification is simple, and meanwhile, the place where the power of left and right pedals of the traditional bicycle is gathered at the earliest is on the middle shaft, so that how to realize signal acquisition in the installation space of the middle shaft of the traditional bicycle is realized, and the modification of the traditional bicycle is minimum, which is one of the difficulties in designing the driving part of the power-assisted electric bicycle.
At present, the scheme of rotating speed and steering sensing of the existing products in the market adopts the scheme that a radial magnetizing speed magnetic ring is arranged on a middle shaft, a speed sensor is arranged at the position corresponding to the magnetic ring, the middle shaft drives the speed magnetic ring to synchronously rotate when being stressed to rotate, and the speed sensor senses the change of a magnetic field when the speed magnetic ring rotates to judge the rotating speed and the steering of the middle shaft. The problems with this solution are: 1. the more the pole pairs of the speed magnetic ring are, the higher the precision is. But the space diameter is small, the magnetizing width is limited, so that the number of pole pairs can only be 16; 2. the induction of the torque sensor depends on electricity or magnetism, a magnetic field exists in the speed magnetic ring, the distance between the speed magnetic ring and the deformation piece is short, signals of the torque sensor are easily interfered, and the precision of the torque sensor is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a moment and speed sensing device that response precision is high.
The utility model discloses still provide an electric bicycle who has above-mentioned moment and speed sensing device in addition.
According to the utility model discloses moment and speed sensing device of first aspect embodiment, include:
the middle shaft is rotatably arranged in the five-way pipe, an induction tooth part is arranged on the outer wall of the middle shaft, and the induction tooth part comprises a plurality of teeth which are uniformly distributed along the circumferential direction of the outer wall of the middle shaft;
the connecting piece is sleeved on the periphery of the middle shaft and used for transmitting power to the chain wheel;
one end of the deformation piece is fixedly connected with the middle shaft, and the other end of the deformation piece is fixedly connected with the connecting piece;
the mounting frame is fixedly arranged in the five-way pipe and sleeved on the periphery of the deformation piece;
the signal processing circuit board is arranged on the mounting rack;
the speed inductor is arranged on the signal processing circuit board and is opposite to the induction tooth part;
the permanent magnet is arranged on one side, away from the speed sensor, of the signal processing circuit board, and the speed sensor is used for sensing the change of a magnetic field of the permanent magnet and transmitting a speed signal to the signal processing circuit board;
and the torque sensor is arranged on the mounting frame and used for sensing the deformation of the deformation piece so as to convey a torque signal to the signal processing circuit board.
According to the utility model discloses moment and speed sensing device of first aspect embodiment has following beneficial effect at least:
when a user enables the middle shaft to rotate by trampling the power input middle shaft, a plurality of teeth of the induction tooth part rotating along with the middle shaft can cause the magnetic field of the permanent magnet to change, the speed sensor can sense the change of the magnetic field to generate a speed signal, the speed signal is transmitted to the signal processing circuit board to be processed to obtain the rotating speed and the rotating direction of the middle shaft, meanwhile, when the middle shaft rotates, the power of the middle shaft is transmitted to the connecting piece through the deformation piece, the power is transmitted to the chain wheel through the connecting piece to drive the wheel to rotate, the deformation piece can deform in the power transmission process, the torque sensor can sense the deformation of the deformation piece to generate a torque signal, the torque signal is transmitted to the signal processing circuit board to be processed to obtain the torque size of the power input into the middle shaft, the signal processing circuit board primarily processes the speed signal and the torque signal and then transmits the processed speed signal to the controller of the hub motor, the controller controls the hub motor to output proper power to match with the manpower to drive the vehicle to run, and accordingly, the user can obtain comfortable riding feeling. Moment and speed sensor relatively current, this moment and speed sensing device is through setting up response tooth portion at the axis, the processing of one side tooth is simpler, reduce the degree of difficulty of processing, on the other hand number of teeth density can set up more, thereby be favorable to improving the response precision of speed inductor, simultaneously because the permanent magnet is installed on the mounting bracket and is kept away from the deformation piece, can reduce the magnetization influence of permanent magnet to the deformation piece, reduce the interference to the moment inductor, thereby be favorable to improving the response precision of moment inductor.
According to some embodiments of the present invention, the torque and speed sensing device further comprises a shield, the shield being covered around the torque sensor.
According to some embodiments of the utility model, the outer wall of mounting bracket is provided with and is located the arch at moment inductor axial both ends, the shielding part card is located two between the arch.
According to the utility model discloses a some embodiments, the moment inductor includes two induction coil, the outer wall of mounting bracket is provided with two ring channels, two induction coil installs in corresponding in the ring channel.
According to some embodiments of the utility model, the moment inductor still includes the connecting wire, induction coil passes through the connecting wire with the signal processing circuit board is connected, the outer wall of mounting bracket is provided with and is used for dodging the groove of dodging of connecting wire.
According to the utility model discloses a some embodiments, the mounting bracket is provided with the recess, the speed inductor imbed in the recess.
According to the utility model discloses a some embodiments still include first mount pad and second mount pad, first mount pad with the second mount pad install in the five-way pipe is along axial both ends, the axis rotate through first bearing install in first mount pad, the connecting piece rotate through the second bearing install in the second mount pad.
According to the utility model discloses a some embodiments, the inner wall of first mount pad is provided with the draw-in groove, the outer wall of mounting bracket is provided with protruding muscle, the mounting bracket passes through protruding muscle joint in draw-in groove and circumference are fixed in first mount pad.
According to the utility model discloses a some embodiments, the outer wall of the deformation piece is provided with the boss, the locating part is installed to centraxonial outer wall, the mounting bracket card is located the boss with between the locating part.
According to the utility model discloses a some embodiments, centraxonial outer wall is provided with installation tooth portion, the inner wall of deformation piece be provided with installation tooth portion complex cooperation tooth portion.
According to some embodiments of the utility model, centraxonial outer wall still is provided with the fender ring, keep off the ring and be located installation tooth portion with between the response tooth portion.
According to the utility model discloses electric bicycle of second aspect embodiment, include the utility model discloses moment and speed sensing device of first aspect embodiment.
According to the utility model discloses electric bicycle of second aspect embodiment has following beneficial effect at least:
the electric bicycle adopts the moment and speed sensing device, when a user inputs power into the center shaft through treading to enable the center shaft to rotate, a plurality of teeth of the induction tooth part rotating along with the center shaft can cause the magnetic field of the permanent magnet to change, the speed sensor can induce the change of the magnetic field to generate speed signals, then the speed signals are transmitted to the signal processing circuit board to be processed to obtain the rotating speed and the rotating direction of the center shaft, meanwhile, when the center shaft rotates, the power of the center shaft is transmitted to the connecting piece through the deformation piece, then the power is transmitted to the chain wheel through the connecting piece to drive the wheel to rotate, the deformation piece can deform in the power transmission process, the moment sensor can induce the deformation of the deformation piece to generate moment signals, then the moment signals are transmitted to the signal processing circuit board to be processed to obtain the moment size of the power input into the center shaft, the signal processing circuit board primarily processes the speed signals and the moment signals and then transmits the speed signals to the controller of the hub motor, and then the controller controls the hub motor to output proper power to match with the manpower to drive the vehicle to run, and accordingly, the user can obtain comfortable riding feeling. Moment and speed sensor relatively current, this moment and speed sensing device is through setting up response tooth portion at the axis, the processing of one side tooth is simpler, reduce the degree of difficulty of processing, on the other hand number of teeth density can set up more, thereby be favorable to improving the response precision of speed inductor, simultaneously because the permanent magnet is installed on the mounting bracket and is kept away from the deformation piece, can reduce the magnetization influence of permanent magnet to the deformation piece, reduce the interference to the moment inductor, thereby be favorable to improving the response precision of moment inductor, and then be favorable to improving the effect of in-wheel motor helping hand, thereby improve the comfort level that the user ridden.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic cross-sectional view of a torque and speed sensing device according to some embodiments of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
fig. 3 is an exploded view of a torque and speed sensing device according to some embodiments of the present invention;
fig. 4 is a schematic perspective view of a bottom bracket according to some embodiments of the present invention;
fig. 5 is an exploded view of a mounting bracket, signal processing circuitry, speed sensor and torque sensor according to some embodiments of the present invention;
fig. 6 is a schematic perspective view of a connector according to some embodiments of the present invention;
fig. 7 is a schematic perspective view of a deformable member according to some embodiments of the present invention;
fig. 8 is a schematic perspective view of a first mounting base according to some embodiments of the present invention.
Reference numerals:
a central axis 100; an inductive tooth 110; mounting teeth 120; a retainer ring 130;
a connecting member 200; the mating connection portion 210;
a deforming member 300; a mating tooth portion 310; a boss 320; the connecting tooth portion 330;
a mounting frame 400; a recess 410; a rib 420; an inverted structure 430; a raised ring structure 440; an annular groove 450; an avoidance slot 460;
a signal processing circuit board 500; a signal line 510;
a speed sensor 600;
a permanent magnet 700;
a torque sensor 800; an induction coil 810; a connecting line 820; a shield 830;
a five-way tube 900; a first mount 910; a card slot 911; a second mount 920; a first bearing 930; a second bearing 940.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise clear and definite limitations, words such as setting, installing, connecting, assembling, matching and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention by combining the specific contents of the technical solutions.
In the related art, the hub motor driving system has the advantages of price advantage and simple and convenient modification, and therefore has a certain market in the industry of the power-assisted electric bicycle. How to match the power drive of the hub motor with manpower to ensure that a user can obtain comfortable riding feeling is always a target pursued by a practitioner of the power-assisted electric bicycle, and the collection of the manpower signal is very important for the basis of drive control. One of the advantages of the hub motor of the electric bicycle is that the modification of the traditional bicycle is small, the modification is simple, and meanwhile, the place where the power of left and right pedals of the traditional bicycle is gathered at the earliest is on the middle shaft, so that how to realize signal acquisition in the installation space of the middle shaft of the traditional bicycle is realized, and the modification of the traditional bicycle is minimum, which is one of the difficulties in designing the driving part of the power-assisted electric bicycle.
At present, the scheme of rotating speed and steering sensing of the existing products in the market adopts the scheme that a radial magnetizing speed magnetic ring is arranged on a middle shaft, a speed sensor is arranged at the position corresponding to the magnetic ring, the middle shaft drives the speed magnetic ring to synchronously rotate when being stressed to rotate, and the speed sensor senses the change of a magnetic field when the speed magnetic ring rotates to judge the rotating speed and the steering of the middle shaft. The problems with this solution are: 1. the more pole pairs of the speed magnetic ring, the higher the precision. But the space diameter is small, the magnetizing width is limited, so that the number of pole pairs can only be 16; 2. the induction of the torque sensor depends on electricity or magnetism, a magnetic field exists in the speed magnetic ring, the speed magnetic ring is close to the deformation piece, signals of the torque sensor are easily interfered, and the precision of the torque sensor is reduced.
In order to solve the aforesaid at least one technical problem, the utility model provides a moment and speed sensing device, it can obtain higher response precision, and the simultaneous processing is simpler.
Referring to fig. 1 to 3, an embodiment of the present invention provides a torque and speed sensing device, including a middle shaft 100, a connecting member 200, a deforming 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 pipe 900, the middle shaft 100 is arranged in the five-way pipe 900 and can rotate in the five-way pipe 900, and two ends of the middle shaft 100 are connected with pedals, so that when a user pedals the pedals, the pedaling power is input into the middle shaft 100. The outer wall of the middle shaft 100 is provided with an induction tooth portion 110, the induction tooth portion 110 comprises a plurality of teeth, the plurality of teeth are uniformly distributed along the circumferential direction of the outer wall of the middle shaft 100, and gaps are formed between adjacent teeth.
The connecting member 200 is sleeved on the periphery of the bottom bracket 100 and is in coaxial clearance fit with the bottom bracket 100. The connecting piece 200 is connected with the chain wheel and used for transmitting power to the chain wheel, and the chain wheel drives the wheel to rotate through the transmission mechanism.
One end of the deformation member 300 is fixedly connected with the middle shaft 100, and the other end is fixedly connected with the connecting member 200, so that the function of transmitting the power of the middle shaft 100 to the connecting member 200 is achieved. For example, the deformable member 300 is substantially a cylindrical structure, one end of the deformable member 300 may be fixed to the outer wall of the central shaft 100 in a sleeved manner, the other end of the deformable member may be in coaxial clearance fit with the central shaft 100, and the connecting member 200 may be fixed to the outer wall of the other end of the deformable member 300 in a sleeved manner. The deformation member 300 may be subjected to a large torque in the process of transmitting power, and may also deform to some extent, so that the deformation member 300 may be made of a metal material with high strength and certain elasticity, for example, an aluminum alloy or a steel material.
The mounting bracket 400 is fixedly disposed in the five-way tube 900, and the periphery of the deformation member 300 is sleeved with the mounting bracket 400. The signal processing circuit board 500 is installed on one side of the mounting frame 400 departing from the center shaft 100, the signal processing circuit board 500 is provided with a signal line 510, and the signal line 510 is connected with a controller of the in-wheel motor. The speed sensor 600 is mounted on the signal processing circuit board 500, and the speed sensor 600 is disposed opposite to the sensing tooth 110 of the bottom bracket axle 100. The permanent magnet 700 is installed on a side of the signal processing circuit board 500 away from the speed sensor 600, and the speed sensor 600 is used for sensing the magnetic field variation of the permanent magnet 700 to transmit a speed signal to the signal processing circuit board 500. Specifically, when middle axle 100 rotates, induction tooth portion 110 rotates along with middle axle 100, because the magnetic induction line can preferentially pass through the material that magnetic permeability is high, consequently a plurality of teeth of induction tooth portion 110 can drive the magnetic induction line and remove when rotating to make permanent magnet 700's magnetic field change, speed inductor 600 can sense this change and output corresponding speed signal.
The moment sensor 800 is installed on the mounting frame 400, and the moment sensor 800 can sense the deformation of the deformation member 300 so as to transmit a moment signal to the signal processing circuit board 500. Specifically, the moment sensor 800 is located outside the middle position of the deformable member 300, so that the degree of distortion of the deformable member 300 can be sensed more sensitively.
When a user steps on the pedal, the power is input into the middle shaft 100 by the pedal to enable the middle shaft 100 to rotate, a plurality of teeth of the induction tooth part 110 rotating along 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, then the speed signal is transmitted to the signal processing circuit board 500 to be processed to obtain the rotating speed and the rotating direction of the middle shaft 100, meanwhile, when the middle shaft 100 rotates, the power of the middle shaft 100 is transmitted to the connecting piece 200 through the deforming piece 300 and then transmitted to the chain wheel through the connecting piece 200 to drive the wheel to rotate, the deforming piece 300 deforms in the power transmission process, the torque sensor 800 can sense the deformation of the deforming piece 300 to generate a torque signal, then the torque signal is transmitted to the signal processing circuit board 500 to be processed to obtain the torque of the power input into the middle shaft 100, the signal processing circuit board 500 primarily processes the speed signal and the torque signal and then transmits the speed signal to the controller of the in-wheel hub motor, and the controller controls the in turn to output appropriate power to match with manpower to drive the vehicle to run, and accordingly the user can obtain comfortable riding feeling. Moment and speed sensor relatively current, this application is through setting up response tooth portion 110 at axis 100, the processing of one side tooth is simpler, reduce the degree of difficulty of processing, on the other hand tooth number density can set up more highly, thereby be favorable to improving speed sensor 600's response precision, simultaneously because permanent magnet 700 installs on mounting bracket 400, consequently can be relative current technique more keep away from the deformation piece 300, reduce the magnetization influence of permanent magnet 700 to deformation piece 300, reduce the interference to moment sensor 800, thereby be favorable to improving moment sensor 800's response precision.
It can be understood that, in order to reduce the interference of the external signal to the torque sensor 800, referring to fig. 1 and 5, in some embodiments of the present invention, the speed and torque sensing apparatus further includes a shielding member 830, and the shielding member 830 is covered on the periphery of the torque sensor 800, so as to isolate the external electromagnetic signal interference and improve the sensing accuracy of the torque sensor 800. Specifically, the shielding member 830 is made of a metal material, for example, the shielding member 830 may be a metal shell or a metal wire mesh, which can perform a good shielding function.
It can be understood that, in order to limit the shielding piece 830 on the mounting bracket 400, refer to fig. 5 in some embodiments of the present invention, the outer wall of the mounting bracket 400 is provided with two protrusions, the two protrusions are located at the outer sides of the axial two ends of the torque sensor 800, when the shielding piece 830 covers the periphery of the torque sensor 800, the two protrusions can play the role of limiting the shielding piece 830 to move along the axial direction, thereby preventing the shielding piece 830 from moving along the axial direction, and being beneficial to improving the shielding effect of the shielding piece 830 on the torque sensor 800. Of course, the two protrusions may have the same structure or different structures, for example, one of the protrusions is a convex ring structure 440, the other protrusion is an inverted structure 430, and a side of the inverted structure 430 away from the convex ring structure 440 has a slope for guiding the shielding member 830. When the shielding element 830 is installed, the shielding element 830 can be moved from the inverse buckle structure 430 to the convex ring structure 440 and sleeved on the outer periphery of the torque sensor 800, and when the shielding element 830 moves between the inverse buckle structure 430 and the convex ring structure 440, the shielding element 830 is limited by the inverse buckle structure 430 and the convex ring structure 440 and cannot move axially.
It should be noted that, in some embodiments of the present invention, referring to fig. 5, the torque sensor 800 includes two induction coils 810, the outer wall of the mounting frame 400 is provided with two annular grooves 450, and the two induction coils 810 are installed in the corresponding annular grooves 450 around the installation, so that the installation of the induction coils 810 is firmer, and the induction coil 810 is prevented from easily shaking to influence the induction precision of deformation of the deformation member 300.
It can be understood that in some embodiments of the utility model, referring to fig. 5, torque sensor 800 still includes connecting wire 820, induction coil 810 passes through connecting wire 820 and is connected with signal processing circuit board 500, the outer wall of mounting bracket 400 is provided with dodges groove 460, connecting wire 820 holding is in dodging groove 460, thereby can avoid connecting wire 820 to protrude in the outer wall of mounting bracket 400, be favorable to improving the installation steadiness of connecting wire 820, reduce external influence to connecting wire 820 simultaneously, thereby be favorable to further improving torque sensor 800's response precision.
It can be understood that, in some embodiments of the present invention, referring to fig. 2, the mounting frame 400 is provided with the 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 110, and the magnetic field of the permanent magnet 700 can be more easily changed when the sensing tooth 110 rotates, thereby facilitating to improve the sensing accuracy of the speed sensor 600.
It can be understood that, in order to facilitate the installation of the middle shaft 100 and the connecting member 200, in some embodiments of the present invention, referring to fig. 1, the torque and speed sensing 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 installed at two ends of the five-way pipe 900 along the axial direction, the middle shaft 100 is rotatably installed at the first mounting seat 910 through the first bearing 930, and the connecting member 200 is rotatably installed at the second mounting seat 920 through the second bearing 940. Specifically, the first mounting seat 910 may be fixedly mounted at one axial end of the five-way pipe 900 in a threaded connection or interference fit manner, and the second mounting seat 920 may be fixedly mounted at the other axial end of the five-way pipe 900 in a threaded connection or interference fit manner. The first mounting base 910 is a hollow structure, the outer ring of the first bearing 930 is fixedly connected to the inner wall of the first mounting base 910, and 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 mounted in the five-way pipe 900 through the first bearing 930 and can smoothly rotate. The second mounting seat 920 is of 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 on the outer wall of the connecting piece 200, so that the connecting piece 200 can smoothly rotate through the second bearing 940.
Of course, a first raceway may be provided on the outer wall of the bottom bracket 100 and the inner wall of the first mounting seat 910, and balls may be installed in the first raceway, so that the bottom bracket 100 may be rotatably installed in the first mounting seat 910. Similarly, the outer wall of the connecting member 200 and the inner wall of the second mounting seat 920 may also be provided with a matching second raceway, in which balls are installed, so that the connecting member 200 can be rotatably installed in the second mounting seat 920.
It can be understood that, in order to be able to fix the mounting bracket 400 in the five-way pipe 900 along the circumference, refer to fig. 5 and 8, in some embodiments of the present invention, the inner wall of the first mounting seat 910 is provided with the clamping groove 911, the outer wall of the mounting bracket 400 is provided with the convex rib 420, the clamping groove 911 and the convex rib 420 are all arranged along the axial direction of the five-way pipe 900, the mounting bracket 400 is mounted in the first mounting seat 910 through the convex rib 420 being connected to the clamping groove 911, so that the mounting bracket 400 can be fixed in the circumference direction, and the mounting bracket 400 can be prevented from rotating relative to the five-way pipe 900 and affecting the normal operation of the relevant components mounted thereon. Certainly, draw-in groove 911 can be provided with a plurality ofly, and a plurality of draw-in grooves 911 set up along circumference interval distribution, and protruding muscle 420 also can be provided with a plurality ofly, and a plurality of protruding muscle 420 set up along circumference interval distribution to go into respectively through a plurality of protruding muscle 420 in the card goes into the draw-in groove 911 that corresponds, make mounting bracket 400 can fix in five-way pipe 900 circumference more firmly. Of course, it is also possible to fixedly connect the mounting bracket 400 to the inner wall of the five-way pipe 900, or fixedly connect the mounting bracket 400 to the second mounting seat 920.
It can be understood that, in order to be able to limit the mounting block 400 in the axial direction and prevent the mounting block 400 from moving in the axial direction, in some embodiments of the present invention, referring to fig. 1 and 7, the outer wall of the end of the deformation element 300 away from the speed sensor 600 is provided with a boss 320, the outer wall of the end of the middle shaft 100 away from the moment sensor 800 is provided with a limiting element, and the mounting block 400 is clamped between the boss 320 and the limiting element, so that the boss 320 and the limiting element can play a role of blocking the mounting block 400 and prevent the mounting block 400 from moving in the axial direction. Specifically, the limiting member may be a snap spring or a shaft sleeve, which can well block the mounting frame 400 from moving along the axial direction.
It can be understood, in order to transmit the power of axis 100 to the deformation piece 300 more reliably, in some embodiments of the present invention, referring to fig. 4 and 7, the outer wall of axis 100 is provided with installation tooth portion 120, installation tooth portion 120 includes the tooth of a plurality of circumference equipartitions, the inner wall of deformation piece 300 is provided with the cooperation tooth portion 310 with installation tooth portion 120 complex, cooperation tooth portion 310 includes a plurality of cooperation teeth along circumference equipartition, during the installation, overlap cooperation tooth portion 310 in the periphery of installation tooth portion 120, make deformation piece 300 joint fixed in the outer wall of axis 100, simultaneously through the cooperation of tooth and tooth, make the power transmission between axis 100 and deformation piece 300 more reliable, reduce the situation that the time of power is too big, deformation piece 300 skidded relative axis 100. Similarly, the deforming member 300 and the connecting member 200 can adopt a similar structure to realize reliable power transmission. For example, referring to fig. 6 and 7, an outer wall of one end of the deformable member 300, which is far away from the mating tooth portion 310, is provided with a connecting tooth portion 330, an inner wall of one end of the connecting member 200 is provided with a mating connecting portion 210, and 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, and meanwhile, power is transmitted between the two through the mating of teeth, so that the power transmission is more reliable.
It should be noted that, in order to prevent that the deformation piece 300 from moving along the axial direction, some embodiments of the present invention, referring to fig. 1 and fig. 4, the outer wall of the middle shaft 100 is further provided with a retaining ring 130, the retaining ring 130 is located between the installation tooth portion 120 and the induction tooth portion 110, the retaining ring 130 can play a role of blocking the axial movement of the deformation piece 300, of course, a limiting structure such as a snap spring can also be fixedly installed on the outer wall of the middle shaft 100, the snap spring is located on one side of the deformation piece 300 far away from the retaining ring 130, so as to limit the axial movement of the deformation piece 300 through the cooperation of the snap spring and the retaining ring 130.
The utility model discloses electric bicycle of second aspect embodiment, including frame, wheel, in-wheel motor and the utility model discloses moment and speed sensing device of first aspect embodiment. The frame is provided with five-way pipe 900, and moment and speed sensing device installs in five-way pipe 900, and the wheel is rotatable to be installed in the frame, and the casing and the wheel fixed connection of in-wheel motor. The rotation speed, the steering and the moment information of the middle shaft 100 collected by the moment and speed sensing device are sent to the controller, the controller controls the hub motor to output appropriate power according to the information, the power treaded by the user is matched to drive the wheels to rotate, and a good power assisting effect is achieved, so that the user can obtain a comfortable riding feeling.
This electric bicycle is owing to adopt the utility model discloses moment and speed sensing device of first aspect embodiment, when the user tramples the footboard, the footboard makes axis 100 rotatory with power input axis 100, a plurality of teeth of following the rotatory response tooth portion 110 of axis 100 can arouse that the magnetic field of permanent magnet 700 changes, speed inductor 600 can respond to the change in magnetic field and produce speed signal, then carry speed signal to signal processing circuit board 500 and handle in order to obtain axis 100's rotation speed and direction of rotation, when axis 100 is rotatory simultaneously, axis 100's power is carried to connecting piece 200 through deformation piece 300, then carry to the chain wheel in order to drive the wheel rotation through connecting piece 200 again, deformation piece 300 can produce deformation at the in-process of carrying power, moment inductor 800 can respond to the deformation of deformation piece 300 and produce the moment signal, then carry the moment size of signal to signal processing circuit board 500 and handle in order to obtain the power of input axis 100, signal processing circuit board 500 sends speed signal and moment signal after preliminary treatment to the controller of in-wheel motor, the suitable power of controller is again controlled in order to cooperate the drive vehicle, thereby make the comfortable sensation of riding to obtain. Moment and speedtransmitter relatively current, this application is through setting up response tooth portion 110 at axis 100, the processing of one side tooth is simpler, reduce the degree of difficulty of processing, on the other hand number of teeth density can set up more, thereby be favorable to improving speed sensor 600's response precision, simultaneously because permanent magnet 700 installs on mounting bracket 400 and keeps away from deformation 300, can reduce the magnetization influence of permanent magnet 700 to deformation 300, reduce the interference to moment sensor 800, thereby be favorable to improving moment sensor 800's response precision.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (12)
1. Moment and speed sensing device, its characterized in that includes:
the middle shaft is rotatably arranged in the five-way pipe and is provided with an induction tooth part, and the induction tooth part comprises a plurality of teeth which are uniformly distributed along the circumferential direction of the outer wall of the middle shaft;
the connecting piece is sleeved on the periphery of the middle shaft and used for transmitting power to the chain wheel;
one end of the deformation piece is fixedly connected with the middle shaft, and the other end of the deformation piece is fixedly connected with the connecting piece;
the mounting frame is fixedly arranged in the five-way pipe and sleeved on the periphery of the deformation piece;
the signal processing circuit board is arranged on the mounting rack;
the speed inductor is arranged on the signal processing circuit board and is opposite to the induction tooth part;
the permanent magnet is arranged on one side, away from the speed sensor, of the signal processing circuit board, and the speed sensor is used for sensing the change of a magnetic field of the permanent magnet so as to convey a speed signal to the signal processing circuit board;
and the torque sensor is arranged on the mounting frame and used for sensing the deformation of the deformation piece so as to transmit a torque signal to the signal processing circuit board.
2. The torque and speed sensing device according to claim 1, further comprising a shield covering an outer periphery of the torque sensor.
3. The torque and speed sensing device according to claim 2, wherein the outer wall of the mounting bracket is provided with protrusions located at two axial ends of the torque sensor, and the shielding member is clamped between the two protrusions.
4. The torque and speed sensor according to claim 1, wherein said torque sensor comprises two induction coils, said outer wall of said mounting frame is provided with two annular grooves, and said two induction coils are mounted in respective said annular grooves.
5. The torque and speed sensing device according to claim 4, wherein the torque sensor further comprises a connection line, the induction coil is connected with the signal processing circuit board through the connection line, and an avoidance groove for avoiding the connection line is provided on an outer wall of the mounting bracket.
6. The torque and speed sensing device according to claim 1 wherein the mounting bracket is provided with a recess, the speed sensor being embedded in the recess.
7. The torque and speed sensing device according to claim 1, further comprising a first mounting seat and a second mounting seat, wherein the first mounting seat and the second mounting seat are mounted at two axial ends of the five-way pipe, the middle shaft is rotatably mounted on the first mounting seat through a first bearing, and the connecting member is rotatably mounted on the second mounting seat through a second bearing.
8. The torque and speed sensing device according to claim 7, wherein a clamping groove is formed in an inner wall of the first mounting seat, a rib is formed in an outer wall of the mounting frame, and the mounting frame is circumferentially fixed to the first mounting seat through the rib clamped in the clamping groove.
9. The torque and speed sensing device according to claim 8, wherein the outer wall of the deformable member is provided with a boss, the outer wall of the middle shaft is provided with a limiting member, and the mounting bracket is clamped between the boss and the limiting member.
10. The torque and speed sensor according to claim 1, wherein the outer wall of the middle shaft is provided with a mounting tooth portion, and the inner wall of the deformation member is provided with a mating tooth portion which mates with the mounting tooth portion.
11. The torque and speed sensing device according to claim 10, wherein the outer wall of the bottom bracket shaft is further provided with a stop ring, and the stop ring is located between the mounting teeth and the sensing teeth.
12. Electric bicycle, characterized in that it comprises a torque and speed sensing device according to any of claims 1 to 11.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222617676.8U CN218055497U (en) | 2022-09-29 | 2022-09-29 | Torque and speed sensing device and electric bicycle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222617676.8U CN218055497U (en) | 2022-09-29 | 2022-09-29 | Torque and speed sensing device and electric bicycle |
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| CN218055497U true CN218055497U (en) | 2022-12-16 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024066262A1 (en) * | 2022-09-29 | 2024-04-04 | 广东威灵电机制造有限公司 | Torque and speed sensing device and electric bicycle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024066262A1 (en) * | 2022-09-29 | 2024-04-04 | 广东威灵电机制造有限公司 | Torque and speed sensing device and electric bicycle |
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