CN115743390A

CN115743390A - Hub assembly with torque detection function and moped

Info

Publication number: CN115743390A
Application number: CN202211526803.1A
Authority: CN
Inventors: 曹海容
Original assignee: Weizman Power Suzhou Co ltd
Current assignee: Weizman Power Suzhou Co ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-03-07

Abstract

The invention discloses a hub assembly with a torque detection function and a moped, wherein the hub assembly comprises a hub and a rotating piece, and a one-way clutch is arranged between the rotating piece and the first side of the hub; the hub is provided with a connecting part for connecting the wheel; a strain gauge is fixed on the wall of the hub; the hub assembly also comprises a collecting plate connected with the strain gauge and a receiving plate capable of carrying out wireless communication with the collecting plate; the collecting plate rotates along with the hub; when the hub assembly is mounted to the frame of the moped, the receiving plate is fixed relative to the frame. According to the invention, the strain gauge is arranged on the wall of the hub, so that the torque is calculated by fully utilizing the torsional deformation generated when the hub transmits the torque to the wheel, the torque detection mechanism can be arranged at the central position of the wheel of the moped, the space of the five-way position of the moped is not occupied, the conventional vehicle type is convenient to transform, the vehicle frame structure or the motor mechanism is not required to be greatly adjusted, and the development cost of a new product can be saved.

Description

Hub assembly with torque detection function and moped

Technical Field

The invention relates to the technical field of moped, in particular to a hub assembly with a moment detection function and a moped.

Background

The moped is a vehicle that can provide helping hand moment as required through the helping hand motor when the user rides, and it both has the enjoyment of riding, can provide the helping hand again under the hard situation of riding, makes the user laborsaving, can promote greatly and ride experience.

In order to provide the assisting torque as required, the riding torque provided by a user needs to be acquired, and a torque acquisition device needs to be used, in the prior art, the torque acquisition device is generally integrated in a built-in motor or mounted at the position of a middle shaft, for example, patent CN111661226A discloses a typical torque sensing device suitable for the built-in motor, which comprises a deformation sleeve, an excitation coil and a signal receiving coil, and a controller detects the deformation amount of the deformation sleeve through the excitation coil and the signal receiving coil and converts the deformation amount into an electric signal. The torque detection device is arranged at the position of a middle shaft and integrated with a middle motor, so that the cost is high, and if the middle motor or the hub motor without the integrated torque detection device is used on the moped, the torque detection device needs to be additionally arranged.

Patent CN104097453A provides a hub device of built-in torque sensor, it includes the hub, sets up main shaft on the hub and install planetary torque sensor in the hub, wherein planetary torque sensor is including installing main epaxial sun gear, with planetary gear set that the sun gear meshes mutually and with planetary gear set meshes mutually's ring gear, planetary gear set with one part in the ring gear is as power input component, and another part is as power output component, sun gear still is provided with the restriction the sun gear rotates the stop gear of certain angle, still includes the torque signal mechanism, the torque signal mechanism with sun gear cooperatees. In the scheme, the torque detection mechanism is complex in structure and high in cost, and the volume of the hub can be obviously increased. Patent CN103171733A provides a torque sensing device for a bottom bracket axle of an electric bicycle, which also detects a torque value through a circumferential deformation generated by a torsion force applied to a collar by additionally arranging the collar, and explains that the device can be applied to measuring the torsion force of a chain in a hub of a bicycle rear hub, but the structure of the scheme is also complex and the cost is high.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides the hub component with the torque detection function, which is simple in structure, low in cost and capable of detecting the manual driving torque, and the moped.

The technical scheme is as follows: in order to achieve the purpose, the hub assembly with the torque detection function comprises a hub and a rotating piece, wherein a one-way clutch is arranged between the rotating piece and the first side of the hub; the hub is provided with a connecting part for connecting wheels; a strain gauge is fixed on the wall of the hub; the hub assembly further comprises a collecting plate connected with the strain gauge and a receiving plate capable of wirelessly communicating with the collecting plate; the collecting plate rotates along with the hub; when the hub assembly is mounted to a frame of the moped, the receiving plate is fixed relative to the frame.

Further, a bearing is arranged between the hub and the rotating member.

Further, the hub assembly further comprises a closed box body, and the collecting plate and the receiving plate are both installed in the box body.

Further, the box body comprises a first box unit and a second box unit; the first box unit is provided with a positioning part for connecting a vehicle frame, and the receiving plate is fixed relative to the first box unit.

Further, the second cartridge unit is fixed with respect to the hub, and the collecting plate is fixed with respect to the second cartridge unit.

Further, at least the second side of the hub is provided with the connecting part, and the first side and the second side are respectively located on two axial sides of the hub.

Further, the rotating part is connected with a power input part

Furthermore, two sides of the collecting board are respectively a first coil side with a first coil and a first circuit side with a first circuit, and the first coil is electrically connected with the first circuit; the two sides of the receiving board are respectively a second coil side with a second coil and a second circuit side with a second circuit, and the second coil is electrically connected with the second circuit; the first coil side and the second coil side are arranged oppositely; the strain gauge is connected with the first circuit; the second circuit is connected with a power supply.

Furthermore, two strain gauges are fixed on the wall of the hub, and the included angle between the two strain gauges and the axis of the hub is 180 degrees; the acquisition board is provided with half-bridge units which are respectively connected with the two strain gauges, and the two half-bridge units are connected into a full-bridge through a bridge-assembling line.

A moped comprises a frame, a power-assisted motor, wheels, a manual device and the hub assembly; a plurality of wheels are arranged on the frame; the hub assembly and the manual device are in transmission relation; the hub and the power-assisted motor are connected with different wheels.

Has the advantages that: according to the hub assembly with the torque detection function and the moped, the strain gauge is arranged on the wall of the hub, so that torsional deformation generated when the hub transmits torque to the wheel is fully utilized, the structure is simple, the torque is calculated by utilizing the deformation of the hub, the torque detection mechanism can be arranged at the central position of the wheel of the moped, the space of a five-way position of the moped is not occupied, the existing vehicle type is convenient to transform, the frame structure does not need to be adjusted greatly, a motor integrated with the torque detection mechanism does not need to be customized, and the development cost of a new product can be saved.

Drawings

FIG. 1 is a block diagram of a hub assembly with torque detection;

FIG. 2 is a layout of an acquisition board and a receiving board;

FIG. 3 is a schematic diagram of a connection circuit between the collecting plate and the strain gauge;

fig. 4 is a structural view of the power-assisted vehicle.

In the figure: a-a vehicle frame; b-a power-assisted motor; c-vehicle wheel; d-a human powered device; e-a hub assembly; 1-flower drum; 11-a connecting portion; 2-a rotating member; 3-a one-way clutch; 4-strain gauge; 5-collecting plate; 51-half bridge cell; 52-bridge circuit group; 5A-first coil side; 5B-first circuit side; 6-receiving a plate; 6A-second coil side; 6B-second circuit side; 7-a bearing; 8, a box body; 81-a first cartridge unit; 82-a second cartridge unit; 9-power input part.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

As shown in fig. 1, the hub assembly E with a torque detection function includes a hub 1 and a rotating member 2, a one-way clutch 3 is disposed between the rotating member 2 and a first side of the hub 1, and in this embodiment, the rotating member 2 is a rotating shaft; the hub 1 is provided with a connecting part 11 for connecting wheels; a strain gauge 4 is fixed on the wall of the hub 1; the hub assembly E also comprises a collecting plate 5 connected with the strain gauge 4 and a receiving plate 6 capable of carrying out wireless communication with the collecting plate 5; the collecting plate 5 rotates along with the hub 1; when the hub component E is installed on a frame A of the moped, the receiving plate 6 is fixed relative to the frame A, and the rotating piece 2 is rotatably connected with the frame A.

Adopt above-mentioned structure, install foil gage 4 on the section of thick bamboo wall of flower-drum 1, make full use of flower-drum 1 produce torsional deformation when transmitting torsion for the wheel, calculate moment in view of the above for moment detection mechanism can install the central point at the vehicle using motor wheel and put, need not occupy the space of vehicle using motor's five-way department, and reform transform the convenience to current motorcycle type, need not to do very big adjustment to frame structure, also need not to customize the integrated motor that has moment detection mechanism, can practice thrift new product development cost.

A bearing 7 is arranged between the hub 1 and the rotating member 2 to ensure the smoothness of the rotating relationship between the hub and the rotating member.

Preferably, the hub assembly E further comprises a closed box 8, and the collecting plate 5 and the receiving plate 6 are both installed in the box 8. The box body 8 includes a first box unit 81 and a second box unit 82; the first box unit 81 has a positioning portion for connecting with the frame a, the receiving plate 6 is fixed relative to the first box unit 81, and after the hub assembly E is mounted on the frame a, the first box unit 81 establishes a fixed connection relationship with the frame a through the positioning portion. The second cartridge unit 82 is fixed with respect to the hub 1, and the collecting plate 5 is fixed with respect to the second cartridge unit 82. Seals are provided between both the first cartridge unit 81 and the second cartridge unit 82, and between either one of them and the rotary member 2. The box body 8 plays a role in dust prevention and water prevention.

Preferably, the connecting portion 11 is disposed on at least a second side of the hub 1, and the first side and the second side are respectively located on two axial sides of the hub 1. Preferably, only the second side of the hub 1 is provided with the connecting portion 11, so that the rotary member 2 is applied to both sides of the hub 1 by the driving force provided by the one-way clutch 3 and the resistance generated by the wheel to which the hub 1 is connected, respectively, to allow the hub 1 to be sufficiently torsionally deformed.

Preferably, the rotating member 2 is connected to a power input member 9, the power input member 9 may be in the form of a sprocket, a speed-changing chain wheel combination, or the like, and may be another transmission mechanism such as a gear, and the illustrated power input member 9 is a speed-changing chain wheel.

Preferably, as shown in fig. 2, two sides of the collecting board 5 are respectively a first coil side 5A having a first coil and a first circuit side 5B having a first circuit, and the first coil is electrically connected to the first circuit, so that electromagnetic interference between the first coil and the first circuit can be avoided; the two sides of the receiving board 6 are respectively a second coil side 6A with a second coil and a second circuit side 6B with a second circuit, and the second coil is electrically connected with the second circuit, so that electromagnetic interference between the second coil and the second circuit can be avoided; the first coil side 5A is disposed opposite the second coil side 6A; the strain gauge 4 is connected with the first circuit; the second circuit is connected with the power supply and is also connected with a main control unit of the moped.

During operation, on one hand, the receiving board 6 supplies power wirelessly for the acquisition board 5 through the electromagnetic induction principle between the second coil and the first coil, on the other hand, the first circuit calculates torque data according to an electric signal generated by deformation of the strain gauge 4, modulates the torque data and then loads the modulated torque data to the first coil, wirelessly transmits the torque data to the receiving board 6 through electromagnetic induction of the first coil and the second coil, the receiving board 6 outputs the torque data to the main control unit, and the main control unit controls the power-assisted motor of the moped to operate according to the torque data so that the torque output by the motor conforms to the current scene. The principle of torque detection based on the receiving plate 6, the collecting plate 5 and the strain gauge 4 is the prior art, and the main innovation point of the invention is that the strain gauge 4 is installed on the cylinder wall of the hub 1, and the torsional deformation of the hub 1 is used as the basis for calculating the torque, so the specific structures of the receiving plate 6 and the collecting plate 5 are not described herein.

Preferably, two strain gauges 4 are fixed on the wall of the hub 1, and an included angle between the two strain gauges 4 and the axis of the hub 1 is 180 degrees; as shown in fig. 3, the collecting plate 5 has half-bridge units 51 respectively connected to the two strain gauges 4, and the two half-bridge units 51 are connected to each other by a bridge-set circuit 52 to form a full bridge. By adopting the structure, the deformation data of the hub 1 can be collected more accurately, and more accurate torque data can be obtained. The collecting plate 5 is a hollow annular structure, and the bridge circuit 52 is routed along the edge of the middle hole of the collecting plate 5, so that the electromagnetic interference between the bridge circuit 52 and the first coil or other parts of the first circuit can be effectively avoided.

The invention also provides a moped, which comprises a frame A, a power-assisted motor B, wheels C, a manual device D and the hub assembly E, wherein the power-assisted motor B is arranged on the frame A; a plurality of wheels C are arranged on the frame A; the hub assembly E and the manual device D are in a transmission relationship, and in the embodiment shown, the manual device D transmits power to the power input part 9 through a chain; in the illustrated embodiment, the moped is in a bicycle shape, the power-assisted motor B is a hub motor and is mounted at the center of a front wheel of the moped, and the hub assembly E is mounted at the center of a rear wheel of the moped, so that the torsional deformation of the hub 1 can effectively reflect the torque generated by the manual device D and cannot be influenced by the power-assisted motor B. In other embodiments, the moped can be a scooter or other multi-wheel type.

For convenience of description, the wheels C connected with the power-assisted motor B and the manual device D are respectively a first wheel and a second wheel.

By adopting the structure, when the user does not step on the manpower device D and the power-assisted motor B runs, the first wheel actively moves, the second wheel moves along, the one-way clutch 3 does not generate a joint action, and at the moment, the hub 1 basically does not generate deformation; when a user steps on the manual device D, the one-way clutch 3 generates a joint action, the driving force of the manual device D is transmitted to the hub 1 through the rotating piece 2, meanwhile, the second wheel generates resistance to the hub 1, the hub is twisted and deformed by the driving force of the manual device D and the resistance of the second wheel, so that the strain gauge 4 deforms, the acquisition board 5 calculates equivalent torque data according to an electric signal generated by the strain gauge 4 and sends the torque data to the receiving board 6, the receiving board 6 sends the torque data to the main control unit of the moped, the main control unit calculates the required boosting torque according to the torque data, the running power of the boosting motor B is adjusted according to the required boosting torque, and the boosting torque is matched with the riding torque.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention, and such modifications and adaptations are intended to be within the scope of the invention.

Claims

1. A hub assembly with a torque detection function comprises a hub (1) and a rotating piece (2), wherein a one-way clutch (3) is arranged between the rotating piece (2) and a first side of the hub (1); the hub (1) is provided with a connecting part (11) for connecting wheels; the device is characterized in that a strain gauge (4) is fixed on the wall of the hub (1); the hub assembly further comprises a collecting plate (5) connected with the strain gauge (4), and a receiving plate (6) capable of carrying out wireless communication with the collecting plate (5); the collecting plate (5) rotates along with the hub (1); when the hub component is installed on a frame (A) of the moped, the receiving plate (6) is fixed relative to the frame (A).

2. Hub assembly with torque detection according to claim 1, wherein a bearing (7) is arranged between the hub (1) and the rotation element (2).

3. Hub assembly with torque detection according to claim 1, further comprising a closed box (8), wherein the acquisition plate (5) and the receiving plate (6) are mounted within the box (8).

4. The hub assembly with torque detection function according to claim 3, wherein the cartridge body (8) includes a first cartridge unit (81) and a second cartridge unit (82); the first box unit (81) has a positioning portion for attaching to a vehicle frame (A), and the receiving plate (6) is fixed with respect to the first box unit (81).

5. A hub assembly with torque detection according to claim 4, wherein the second cassette unit (82) is fixed in relation to the hub (1) and the pick plate (5) is fixed in relation to the second cassette unit (82).

6. A hub assembly with torque detection according to claim 1, wherein the hub (1) is provided with the attachment portion (11) on at least a second side, the first and second sides being located on both axial sides of the hub (1).

7. Hub assembly with torque detection according to claim 1, wherein the rotation element (2) is connected to a power input (9).

8. Hub assembly with torque detection function according to claim 1, wherein the two sides of the pick-up plate (5) are a first coil side (5A) with a first coil and a first circuit side (5B) with a first circuit, respectively, the first coil being electrically connected with the first circuit; two sides of the receiving board (6) are respectively a second coil side (6A) with a second coil and a second circuit side (6B) with a second circuit, and the second coil is electrically connected with the second circuit; the first coil side (5A) is arranged opposite to the second coil side (6A); the strain gauge (4) is connected with the first circuit; the second circuit is connected with a power supply.

9. The hub assembly with the torque detection function according to claim 8, wherein two strain gauges (4) are fixed on the wall of the hub (1), and the included angle between the two strain gauges (4) and the axis of the hub (1) is 180 °; the acquisition board (5) is provided with half-bridge units (51) respectively connected with the two strain gauges (4), and the two half-bridge units (51) are connected into a full bridge through a bridge combination circuit (52).

10. A moped, characterized in that it comprises a frame (a), a booster motor (B), wheels (C), a manual device (D) and a hub assembly according to any one of claims 1-9; the frame (A) is provided with a plurality of wheels (C); the hub assembly and the manual device (D) have a transmission relationship; the hub (1) and the booster motor (B) are connected with different wheels (C).