A torque sensor device for a power-assisted vehicle and the power-assisted vehicle

Abstract

The present invention provides a torque sensor device for a power-assisted vehicle and a power-assisted vehicle, relating to the technical field of power-assisted vehicles. The torque sensor device for a power-assisted vehicle includes a chainring, a signal transmitter, a signal receiver, a Hall element, a magnetic block and a controller. A gap is formed in the connecting plate. The Hall element and the magnetic block are connected to the surface of the connecting plate and are respectively located on both sides of the gap. The signal transmitter is electrically connected to the Hall element, the signal receiver is communicatively connected to the signal transmitter, and the controller is electrically connected to the signal receiver. In the present invention, the Hall element and the magnetic block also generate relative displacement as the first part and the second part rotate. The Hall element generates an electrical signal, which is sent to the controller through the signal transmitter and the signal receiver to control the power-assisted vehicle to rotate at an accelerated speed. Since the force applied by a person to the crank is different, the electrical signal generated by the Hall element is also different, so that the electric power of the power-assisted vehicle can change following the power generated by the person's pedaling, facilitating the power-assisted vehicle to accelerate.

Description

Technical Field

[0001] The present invention relates to the technical field of power-assisted bicycles, and in particular to a torque sensor device for power-assisted bicycles and a power-assisted bicycle. Background Art

[0002] A power-assisted bicycle, also known as an electric bicycle, is a means of transportation that adds electric drive to a bicycle. It is driven by both human and electric power, but during riding, the electric power cannot well follow the person's riding assistance intention. For example, when climbing a slope, riding against the wind, starting, and riding with heavy objects, when a person applies a lot of force to the pedals, the power-assisted bicycle cannot quickly output an equal power. In this case, riding a power-assisted bicycle is more laborious, and the power-assisted bicycle cannot play a good role in facilitating travel. Summary of the invention

[0003] The problem to be solved by the present invention is how to make the electric power and manual power of the power-assisted vehicle more compatible.

[0004] To this end, the present invention provides a torque sensor device for a power-assisted vehicle, comprising a toothed disc, a signal transmitter, a signal receiver, a Hall element, a magnetic block and a controller, wherein the toothed disc comprises an inner disc, an outer disc and a connecting plate connected between the inner disc and the outer disc, wherein a gap is provided on the connecting plate, wherein the gap penetrates the connecting plate along the axial direction of the toothed disc, wherein one end of the gap penetrates the edge of the connecting plate and divides the connecting plate into a first part and a second part, wherein the first part and the second part are respectively connected to the inner disc and the outer disc, wherein the Hall element and the magnetic block are connected to the surface of the connecting plate and are respectively located on the first part and the second part on both sides of the gap, wherein the signal transmitter is arranged on the connecting plate and is electrically connected to the Hall element, wherein the signal receiver is communicatively connected to the signal transmitter, wherein the controller is electrically connected to the signal receiver, and wherein the controller is used to control the rotation of the toothed disc.

[0005] Optionally, the other end of the gap extends toward the center of the inner disk.

[0006] Optionally, the Hall element and the magnetic block are respectively connected to surfaces on both sides of the connecting plate.

[0007] Optionally, there are multiple connecting plates, and the multiple connecting plates are evenly distributed along the circumference of the crankset, and the gap, the Hall element, the signal transmitter and the magnetic block are provided on any of the connecting plates.

[0008] Optionally, the torque sensor device for a power-assisted vehicle further comprises a crank, and the crank is drivingly connected to the inner disc.

[0009] Optionally, a receiving groove is formed on the surface of one end of the crank connected to the inner disc, and the signal receiver is disposed in the receiving groove.

[0010] Optionally, the magnetic block is a permanent magnet.

[0011] Optionally, the Hall element is welded to the connecting plate.

[0012] Optionally, the torque sensor device for a power-assisted vehicle further includes a motor, the motor is electrically connected to the controller, and the motor is used to drive the inner disc to rotate.

[0013] Compared with the prior art, the beneficial effects of the torque sensor device for a power-assisted vehicle of the present invention are as follows:

[0014] In the present invention, the chainring of the power-assisted vehicle is divided into an inner disc, an outer disc and a connecting plate connecting the inner disc and the outer disc. The outer disc is used to connect with the power-assisted vehicle chain. A gap is formed at the edge of the connecting plate. One end of the gap penetrates through the edge of the connecting plate and communicates with the outside. The gap penetrates through the connecting plate along the axial direction of the chainring. The connecting plate is divided into two parts with the gap as the demarcation line, namely a first part and a second part. The first part is connected to the inner disc, and the second part is connected to the outer disc. It should be noted that the gap does not divide the connecting plate into two independent parts, that is, the first part and the second part are partially connected at the other end of the gap. The chainring has two driving modes. One is to drive the chainring to rotate manually, and the other is to drive the chainring to rotate electrically. When a person rides a bicycle, first drive the inner disc to rotate manually, and the inner disc drives the first part, the second part, and the outer disc to rotate in sequence. Since the first part and the second part are partially connected, relative displacement will occur between the first part and the second part during the process of transmitting the rotational torque from the first part to the second part. A Hall element and a magnetic block are respectively connected to the first part and the second part. The Hall element and the magnetic block will also generate relative displacement as the connecting plate rotates. The Hall element cuts the magnetic induction lines generated by the magnetic block to detect the torque applied by the person and generate an electrical signal. On this basis, a signal transmitter is disposed on the surface of the connecting plate. The position of the signal transmitter is close to the Hall element and is electrically connected to the Hall element. The signal transmitter sends the electrical signal generated by the Hall element to the signal receiver. The signal receiver is electrically connected to the controller and transmits the received signal to the controller. The controller controls the power-assisted vehicle to accelerate and rotate according to the received signal. Since the force applied by the person is different, the relative displacement of the two parts of the connecting plate is also different, so that the electrical signal generated by the Hall element is also different. The controller adjusts the electric power of the power-assisted vehicle according to the received electrical signal, so that the electric power of the power-assisted vehicle can change following the power generated by the person's pedaling, improving the riding comfort and facilitating the power-assisted vehicle to accelerate.

[0015] In addition, to solve the above problems, the present invention also provides a power-assisted vehicle, including the power-assisted vehicle described in any one of the above.

[0016] Compared with the prior art, the beneficial effects of the scooter of the present invention are roughly the same as those of the above-mentioned scooter, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. 7 is a schematic structural diagram of a torque sensor device for a prior art scooter;

[0018] Figure 2 FIG. 11 is a front view of the chainring according to an embodiment of the present invention;

[0019] Figure 3 FIG. 15 is a rear view of the chainring according to an embodiment of the present invention.

[0020] Description of the Reference Numerals:

[0021] 1 - crank; 2 - chainring; 21 - inner disk; 22 - outer disk; 23 - connecting plate; 231 - first part; 232 - second part; 3 - gap; 4 - Hall element; 5 - magnet; 6 - signal transmitter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be given with reference to the accompanying drawings.

[0023] It should be noted that in the description of the present invention, the orientation or positional relationships indicated by "upper", "lower", "left", "right", "top", "bottom", "front", "rear", "inner", and "outer" are based on the orientation or positional relationships shown in the accompanying drawings. This is only for the convenience of describing the present invention and does not indicate or imply that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention.

[0024] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features.

[0025] Moreover, although the present invention is described with reference to specific embodiments, it should be understood that these embodiments are only examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed, as long as they do not deviate from the spirit and scope of the present invention defined by the appended claims. It should be understood that different dependent claims and the features in this article can be combined in a manner different from that described in the original claims. It should also be understood that the features described in connection with a single embodiment can be used in other embodiments.

[0026] To solve the above problems, as Figures 1 to 3 shown, the present invention provides a torque sensor device for a power-assisted vehicle, which includes a chainring 2, a signal transmitter 6, a signal receiver, a Hall element 4, a magnet 5 and a controller. The chainring 2 includes an inner disk 21, an outer disk 22 which are concentrically arranged, and a connecting plate 23 connected between the inner disk 21 and the outer disk 22. A gap 3 is formed on the connecting plate 23. The gap 3 axially penetrates the connecting plate 23 along the chainring 2. One end of the gap 3 penetrates the edge of the connecting plate 23 and divides the connecting plate 23 into a first part 231 and a second part 232. The first part 231 and the second part 232 are respectively connected to the inner disk 21 and the outer disk 22. The Hall element 4 and the magnet 5 are connected to the surface of the connecting plate 23 and are respectively located on the first part 231 and the second part 232 on both sides of the gap 3. The signal transmitter 6 is arranged on the connecting plate 23 and is electrically connected to the Hall element 4. The signal receiver is communicatively connected to the signal transmitter 6. The controller is electrically connected to the signal receiver. The controller is used to control the rotation of the chainring 2.

[0027] In this embodiment, the chainring 2 of the power-assisted vehicle is divided into an inner disc 21, an outer disc 22, and a connecting plate 23 connected between the inner disc 21 and the outer disc 22. The outer disc 22 is used to connect with the power-assisted vehicle chain. A gap 3 is opened at the edge of the connecting plate 23. One end of the gap 3 penetrates through the edge of the connecting plate 23 and communicates with the outside. The gap 3 penetrates through the connecting plate 23 along the axial direction of the chainring 2. The connecting plate 23 is divided into two parts with the gap 3 as the boundary, namely the first part 231 and the second part 231. The first part 231 is connected to the inner disc 21, and the second part 232 is connected to the outer disc 22. It should be noted that the gap 3 does not divide the connecting plate 23 into two independent parts, that is, the first part 231 and the second part 231 are locally connected at the other end of the gap 3. The chainring 2 has two driving methods. One is to drive the chainring 2 to rotate manually, and the other is to drive the chainring 2 to rotate electrically. When a person rides a bike, first drive the inner disc 21 to rotate manually. The inner disc 21 drives the first part 231, the second part 231, and the outer disc 22 to rotate in sequence. Since the first part 231 and the second part 232 are locally connected, during the process of transmitting the rotational torque from the first part 231 to the second part 232, relative displacement will occur between the first part 21 and the second part 232. A Hall element 4 and a magnet 5 are respectively connected to the first part 231 and the second part 232. The Hall element 4 and the magnet 5 will also generate relative displacement as the connecting plate 23 rotates. The Hall element 4 cuts the magnetic induction lines generated by the magnet 5, detects the torque applied by the person, and generates an electrical signal. On this basis, a signal transmitter 6 is arranged on the surface of the connecting plate 23. The position of the signal transmitter 6 is close to the Hall element 4 and is electrically connected to the Hall element 4. The signal transmitter 6 sends the electrical signal generated by the Hall element 4 to the signal receiver. The signal receiver is electrically connected to the controller and transmits the received signal to the controller. The controller controls the power-assisted vehicle to accelerate and rotate according to the received signal. Since the force applied by the person is different, the relative displacement of the two parts of the connecting plate 23 is also different, so that the electrical signals generated by the Hall element 4 are also different. The controller adjusts the electric power of the power-assisted vehicle according to the received electrical signal, so that the electric power of the power-assisted vehicle can change following the power generated by the person's pedaling, improving the riding comfort and facilitating the power-assisted vehicle to accelerate.

[0028] Specifically, it further includes a power supply. The power supply supplies power to the Hall element 4, the signal transmitter 6, the signal receiver, and the controller. There can be multiple power supplies; the signal transmitter 6 and the signal receiver are wirelessly connected for communication.

[0029] Optionally, as Figure 2 and Figure 3 shown, the other end of the gap 3 extends towards the center direction of the inner disc 21.

[0030] In this embodiment, one end of the slit 3 penetrates through the edge of the connecting plate 23. By setting the extending direction of the other end of the slit 3 towards the center direction of the inner disk 21, the extending direction of the slit 3 is substantially perpendicular to the rotation direction of the connecting plate 23, which can make the relative displacement generated by the two parts of the connecting plate 23 divided by the slit 3 larger during rotation, facilitating the Hall element 4 to cut the magnetic induction lines generated by the magnetic block 5.

[0031] Optionally, as Figure 2 and Figure 3 shown, the Hall element 4 and the magnetic block 5 are respectively connected to the surfaces on both sides of the connecting plate 23.

[0032] In this embodiment, by connecting the Hall element 4 and the magnetic block 5 to both sides of the connecting plate 23 respectively, sufficient installation positions are reserved for the Hall element 4 and the magnetic block 5, avoiding mutual interference between the magnetic block 5 and the Hall element 4 during installation.

[0033] Optionally, as Figure 2 and Figure 3 shown, there are multiple connecting plates 23, and the multiple connecting plates 23 are evenly distributed along the circumferential direction of the chainring 2. Each connecting plate 23 is provided with the slit 3, the Hall element 4, the signal transmitter 6 and the magnetic block 5.

[0034] In this embodiment, by setting multiple connecting plates 23, for example, five connecting plates 23 are evenly distributed along the circumferential direction of the chainring 2, and each connecting plate 23 is provided with a slit 3, and the Hall element 4, the signal transmitter 6 and the magnetic block 5 are arranged on both sides of each slit 3, making the Hall element 4 sense the relative displacement of the two parts of the connecting plate 23 more accurately.

[0035] Specifically, the inner disk 21, the outer disk 22 and the connecting plate 23 can be an integrally formed structure. The inner disk 21 and the connecting plate 23 as a whole are similar to a pentagram shape, and the five corners of the pentagram are the five connecting plates 23.

[0036] Optionally, as Figure 1 shown, the torque sensor device of the power-assisted vehicle further includes a crank 1, and the crank 1 is drivingly connected to the inner disk 21.

[0037] In this embodiment, by setting the crank 1 and connecting the crank 1 to the inner disk 21, one end of the crank 1 away from the inner disk 21 is a pedal, which is convenient for a person to step on the pedal when riding a bicycle, drive the crank 1 and the chainring 2 to rotate, so that a small relative displacement will be generated between the first part 231 and the second part 232 during rotation, and the Hall element 4 and the magnetic block 5 will also generate a relative displacement along with the rotation of the connecting plate 23.

[0038] Optionally, a receiving groove is formed on the surface of one end of the crank 1 connected to the inner disk 21, and the signal receiver is arranged in the receiving groove.

[0039] In this embodiment, the crank 1 is drivingly connected to the inner disk 21. One end of the crank 1 facing the inner disk 21 is in spline connection with the inner disk 21. An internal spline groove is formed on the inner disk 21, and an external spline is provided at one end of the crank 1. A receiving groove may be formed on the surface of the end of the external spline. By connecting the signal receiver in the receiving groove, an installation position is provided for the signal receiver.

[0040] Optionally, the magnet 5 is a permanent magnet.

[0041] In this embodiment, by setting the magnet 5 as a permanent magnet, the magnet 5 can provide a stable magnetic field, preventing the device from failing due to demagnetization of the magnet 5.

[0042] Optionally, the Hall element 4 is welded to the connecting plate 23.

[0043] In this embodiment, by welding the Hall element 4 to the connecting plate 23, the connection stability between the Hall element 4 and the connecting plate 23 is improved, avoiding any movement of the Hall element 4.

[0044] Specifically, the magnet 5 can be welded to the connecting plate 23, improving the connection structure stability between the magnet 5 and the connecting plate 23, avoiding the situation where the chainring 2 does not rotate and there is a relative displacement between the Hall element 4 and the magnet 5.

[0045] Optionally, the torque sensor device for a power-assisted vehicle further includes a motor, and the motor is electrically connected to the controller, and the motor is used to drive the inner disk 21 to rotate.

[0046] In this embodiment, by providing a motor, which is electrically connected to the controller, the controller adjusts the motor speed according to the received signal, and the motor drives the inner disk 21 to rotate, thereby adjusting the rotation speed of the inner disk 21 to make the electric power match the manual power.

[0047] Another embodiment of the present invention provides a power-assisted vehicle, including the above-mentioned torque sensor device for a power-assisted vehicle.

[0048] Compared with the prior art, the beneficial effects of the power-assisted vehicle in this embodiment are substantially the same as those of the above-mentioned torque sensor device for a power-assisted vehicle, and will not be elaborated here.

[0049] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will all fall within the protection scope of the present invention.

Claims

1. A torque sensor device for a power-assisted vehicle, characterized in that: The invention comprises a toothed disc (2), a signal transmitter (6), a signal receiver, a Hall element (4), a magnetic block (5) and a controller, wherein the toothed disc (2) comprises an inner disc (21), an outer disc (22) and a connecting plate (23) connected between the inner disc (21) and the outer disc (22), wherein a slit (3) is provided on the connecting plate (23), wherein the slit (3) penetrates the connecting plate (23) along the axial direction of the toothed disc (2), wherein one end of the slit (3) penetrates the edge of the connecting plate (23) and divides the connecting plate (23) into a first part (231) and a second part (232), wherein the first The first part (231) and the second part (232) are connected to the inner disk (21) and the outer disk (22) respectively, the Hall element (4) and the magnetic block (5) are connected to the surface of the connecting plate (23) and are respectively located on the first part (231) and the second part (232) on both sides of the gap (3), the signal transmitter (6) is arranged on the connecting plate (23) and is electrically connected to the Hall element (4), the signal receiver is communicatively connected to the signal transmitter (6), the controller is electrically connected to the signal receiver, and the controller is used to control the rotation of the toothed disk (2); The other end of the slit (3) extends toward the center of the inner disk (21).

2. The torque sensor device for a power-assisted vehicle according to claim 1, characterized in that: The Hall element (4) and the magnetic block (5) are respectively connected to the surfaces on both sides of the connecting plate (23).

3. The torque sensor device for a power-assisted vehicle according to claim 1, characterized in that: There are a plurality of connecting plates (23), and the plurality of connecting plates (23) are evenly distributed along the circumference of the toothed disc (2). Any of the connecting plates (23) is provided with the gap (3), the Hall element (4), the signal transmitter (6) and the magnetic block (5).

4. The torque sensor device for a power-assisted vehicle according to claim 1, characterized in that: It also comprises a crank (1), wherein the crank (1) is drivingly connected to the inner disc (21).

5. The torque sensor device for a power-assisted vehicle according to claim 4, characterized in that: An accommodating groove is provided on the surface of one end of the crank (1) connected to the inner disk (21), and the signal receiver is arranged in the accommodating groove.

6. The torque sensor device for a power-assisted vehicle according to claim 1, characterized in that: The magnetic block (5) is magnetic steel.

7. The torque sensor device for a power-assisted vehicle according to claim 1, characterized in that: The Hall element (4) is welded on the connecting plate (23).

8. The torque sensor device for a power-assisted vehicle according to claim 1, characterized in that: It also includes a motor, which is electrically connected to the controller and is used to drive the inner disk (21) to rotate.

9. A power-assisted vehicle, characterized in that: It comprises a torque sensor device for a power-assisted vehicle as claimed in any one of claims 1 to 8.

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