CN113911256A - Hub torque sensor, working method and vehicle - Google Patents
Hub torque sensor, working method and vehicle Download PDFInfo
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- CN113911256A CN113911256A CN202111217298.8A CN202111217298A CN113911256A CN 113911256 A CN113911256 A CN 113911256A CN 202111217298 A CN202111217298 A CN 202111217298A CN 113911256 A CN113911256 A CN 113911256A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
- B62M6/40—Rider propelled cycles with auxiliary electric motor
- B62M6/45—Control or actuating devices therefor
- B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof
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Abstract
The invention provides a hub torque sensor, a working method and a vehicle, comprising the following steps: the output shaft, the magnetic steel, the torque inner sleeve, the shaft, the elastic element, the torque outer sleeve and the bevel gear sleeve; the output shaft, the torque inner sleeve, the torque outer sleeve and the bevel gear sleeve are sleeved on the periphery of the shaft; the output shaft is meshed with the helical gear sleeve through helical teeth, and the helical gear sleeve is connected with the torque inner sleeve; the torque outer sleeve is sleeved on the outer side of the torque inner sleeve, the elastic element is arranged between the torque inner sleeve and the torque outer sleeve in the axial direction, and the torque inner sleeve is allowed to move relative to the torque outer sleeve in the axial direction; the magnetic steel is installed on the torque inner sleeve, and the Hall sensor is installed on the torque outer sleeve. The existing middle shaft type torque sensor is high in price, needs to be matched with a customized chain wheel support, can be directly used for replacing a bicycle hub by directly using existing bicycle accessories, and has the advantages of low manufacturing cost and high cost performance.
Description
Technical Field
The invention relates to a motor driving system, in particular to a hub torque sensor, a working method and a vehicle.
Background
The foremost technology in the field of electric moped (Pedelec) is a torque sensor, which is the core of understanding the intention of a rider of an electric power assisting system of a bicycle. At present, most torque sensors of electric power-assisted bicycles are middle shaft torque sensors. The traditional middle motor driving system adopts a strain gauge type torque sensor or a magnetic induction type torque sensor, so that the problems of large volume, heavy weight and non-return-to-zero torque of the torque sensor are easy to occur. The present application seeks to provide a hub torque sensor that is distinguished from a bottom bracket torque sensor.
Patent document CN106428394A provides an electric power-assisted bicycle, a centrally-mounted motor driving system thereof and a control method, including a middle shaft assembly, a torque sensor assembly and/or a clutch assembly; the middle shaft assembly comprises a middle shaft; the torque sensor assembly is connected with the middle shaft.
Patent document CN110949597A discloses a centrally-mounted driving device, which comprises a housing, a motor arranged in the housing, a speed reducing mechanism, a middle shaft and a chain wheel device, wherein the speed reducing mechanism is in transmission connection with the motor; the middle shaft is used for connecting the treading device and is rotatably arranged in the shell; the gear wheel device is connected with the middle shaft through a second clutch so that the middle shaft drives the gear wheel device to rotate; in the power-assisted working mode, the first clutch is in transmission connection with the output end of the speed reducing mechanism and the chain wheel device so that the output end transmits power to the chain wheel device; under the non-power-assisted working mode, the output end of the first clutch disconnecting speed reducing mechanism is connected with the power of the chain wheel device.
The prior patent adopts a middle shaft torque sensor, and the scheme that the electric moped adopts a hub torque sensor cannot be realized.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a hub torque sensor, a working method and a vehicle.
According to the present invention, there is provided a hub torque sensor comprising: the output shaft, the magnetic steel, the torque inner sleeve, the shaft, the elastic element, the torque outer sleeve and the bevel gear sleeve;
the output shaft, the torque inner sleeve, the torque outer sleeve and the bevel gear sleeve are sleeved on the periphery of the shaft;
the output shaft is meshed with the helical gear sleeve through helical teeth, the helical gear sleeve is connected with the torque inner sleeve, and the output shaft drives the torque inner sleeve to axially move through the helical gear sleeve;
the torque outer sleeve is sleeved on the outer side of the torque inner sleeve, the elastic element is arranged between the torque inner sleeve and the torque outer sleeve in the axial direction, and the torque inner sleeve is allowed to move relative to the torque outer sleeve in the axial direction;
the magnetic steel is installed on the torque inner sleeve, and the Hall sensor is installed on the torque outer sleeve.
Preferably, the shaft extends outwards along the peripheral side to form a flash, and one side of the torque jacket is fixedly installed on the flash;
the torque inner sleeve is arranged in the other side of the torque outer sleeve and is allowed to move axially relative to the shaft.
Preferably, a thrust ball bearing is arranged on the inner side of one side, back to the elastic element, of the torque inner sleeve;
one side of the thrust ball bearing, which is back to the elastic element, is connected with one side of the sliding sleeve;
the thrust ball bearing and the sliding sleeve are allowed to move axially relative to the shaft.
Preferably, the other side of the sliding sleeve is connected with one side of the helical gear sleeve;
the inner side of the other side of the bevel gear sleeve is engaged with the output shaft through the bevel gear;
the output shaft is coaxially and rotatably connected with the shaft.
Preferably, the torque jacket is fixedly provided with a PCB board, and the PCB board is provided with the Hall sensor.
Preferably, an end cover is installed on one side, facing away from the elastic element, of the output shaft;
the output shaft portion passes through the end cap.
Preferably, the end cover is fixedly provided with a hub by screws on one side facing the elastic element;
the hub is internally provided with a cavity, and the flash, the output shaft, the magnetic steel, the torque inner sleeve, the elastic element, the torque outer sleeve, the bevel gear sleeve, the Hall sensor, the thrust ball bearing and the sliding sleeve are all arranged in the cavity.
Preferably, a first bearing is mounted between the hub and the shaft;
a second bearing is arranged between the output shaft and the end cover;
and a third bearing is arranged between the output shaft and the shaft.
Preferably, the working method of the hub torque sensor comprises the following steps:
step S1, the output shaft rotates by applying torque, and the output shaft drives the bevel gear sleeve, the hub and the end cover to coaxially rotate;
step S2, the output shaft generates torque opposite to the rotation direction through external load, and the opposite torque drives the helical gear sleeve through the helical gear meshing;
step S3, the helical gear sleeve realizes axial movement through the engagement of the helical gear, and the helical gear sleeve pushes the sliding sleeve, the thrust ball bearing and the torque inner sleeve to move axially;
step S4, the torque inner sleeve compresses the elastic element, the magnetic steel drives the axial movement through the torque inner sleeve, and the Hall sensor senses the change of the magnetic field and outputs a signal;
and step S5, when the output shaft stops rotating, the sliding sleeve, the thrust ball bearing and the torque inner sleeve are reset through the elastic force of the elastic element.
Preferably, a vehicle employs the hub torque sensor.
Preferably, the elastic element is fitted with a wave spring.
Preferably, the magnetic steel is driven by the output shaft to rotate and generate an N pole magnetic field and an S pole magnetic field, the N pole magnetic field and the S pole magnetic field rotate, and the Hall sensor outputs orthogonal signals.
Compared with the prior art, the invention has the following beneficial effects:
1. the device provides a novel hub torque sensing device, and the device is reasonable in structure and accurate in test;
2. the existing middle shaft type torque sensor is high in price, needs to be matched with a customized chain wheel support, can be directly used for replacing a bicycle hub by directly using existing bicycle accessories, and has the advantages of low manufacturing cost and high cost performance.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural view of a hub torque sensor;
shown in the figure:
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
As shown in fig. 1, a hub torque sensor for an electric power assisted bicycle includes: the device comprises an output shaft 1, magnetic steel 2, a torque inner sleeve 3, a shaft 4, an elastic element 6, a torque outer sleeve 7 and a bevel gear sleeve 9; an output shaft 1, a torque inner sleeve 3, a torque outer sleeve 7 and a bevel gear sleeve 9 are sleeved on the periphery of a shaft 4, the output shaft 1 and the bevel gear sleeve 9 are meshed through bevel gears, the bevel gear sleeve 9 is connected with the torque inner sleeve 3, the output shaft 1 drives the torque inner sleeve 3 to axially move through the bevel gear sleeve 9, the torque outer sleeve 7 is sleeved on the outer side of the torque inner sleeve 3, an elastic element 6 is installed between the torque inner sleeve 3 and the torque outer sleeve 7 in the axial direction, the torque inner sleeve 3 is allowed to axially move relative to the torque outer sleeve 7, magnetic steel 2 is installed on the torque inner sleeve 3, and a Hall sensor is installed on the torque outer sleeve 7. The moment outer sleeve 7 is fixedly provided with a PCB board which is provided with a Hall sensor. The side of the output shaft 1, which faces away from the elastic element 6, is provided with an end cover 10, and the output shaft 1 partially penetrates through the end cover 10. A first bearing is arranged between the hub 5 and the shaft 4, a second bearing is arranged between the output shaft 1 and the end cover 10, and a third bearing is arranged between the output shaft 1 and the shaft 4.
A flange extends outwards from the shaft 4 along the peripheral side, one side of the torque outer sleeve 7 is fixedly installed on the flange, the torque inner sleeve 3 is installed inside the other side of the torque outer sleeve 7, and the torque inner sleeve 3 is allowed to move axially relative to the shaft 4. The inner side of the torque inner sleeve 3, which is opposite to the elastic element 6, is provided with a thrust ball bearing, the side of the thrust ball bearing, which is opposite to the elastic element 6, is connected with the side of a sliding sleeve 8, and the thrust ball bearing and the sliding sleeve 8 are allowed to move axially relative to the shaft 4. The other side of the sliding sleeve 8 is connected with one side of a helical gear sleeve 9, the inner side of the other side of the helical gear sleeve 9 is provided with an output shaft 1 through helical gear meshing, and the output shaft 1 coaxially rotates a connecting shaft 4. The end cover 10 is fixedly installed on one side, facing the elastic element 6, of the wheel hub 5 through a screw 11, a cavity is formed in the wheel hub 5, and the flash, the output shaft 1, the magnetic steel 2, the torque inner sleeve 3, the elastic element 6, the torque outer sleeve 7, the helical gear sleeve 9, the Hall sensor, the thrust ball bearing and the sliding sleeve 8 are all installed in the cavity.
The embodiment also provides a working method of the hub torque sensor, which comprises the following steps: step S1, the output shaft 1 rotates by applying torque, and the output shaft 1 drives the bevel gear sleeve 9, the hub 5 and the end cover 10 to coaxially rotate; step S2, the output shaft 1 generates torque opposite to the rotation direction through external load, and the opposite torque is engaged with the transmission bevel gear sleeve 9 through helical teeth; step S3, the helical gear sleeve 9 moves axially through acting force and reacting force, and the helical gear sleeve 9 pushes the sliding sleeve 8, the thrust ball bearing and the torque inner sleeve 3 to move axially; step S4, the torque inner sleeve 3 compresses the elastic element 6, the magnetic steel 2 is driven by the torque inner sleeve 3 to move axially, and the Hall sensor senses the change of the magnetic field and outputs a signal; in step S5, when the output shaft 1 stops rotating, the sliding sleeve 8, the thrust ball bearing, and the torque inner sleeve 3 are elastically restored by the elastic member 6.
The present embodiment can directly borrow current bicycle accessories, and the wheel hub 5 alright use of direct replacement bicycle need not supporting customization chain wheel support, and the cost is cheap, has high performance price ratio.
Example 2
Example 2 is a preferred example of example 1.
As shown in fig. 1, the present embodiment includes: the device comprises an output shaft 1, magnetic steel 2, a torque inner sleeve 3, a shaft 4, a hub 5, an elastic element 6, a torque outer sleeve 7, a sliding sleeve 8, a helical gear sleeve 9 and an end cover 10;
the output shaft 1 is meshed with the helical gear sleeve 9 through helical teeth, the sliding sleeve 8 is sleeved on the shaft 4 and can slide along the axial direction of the shaft 4, one end of the sliding sleeve 8 is connected with the helical gear sleeve 9, the other end of the sliding sleeve is connected with the torque inner sleeve 3 through a thrust ball bearing, and the sliding sleeve 8 can act on the torque inner sleeve 3 through the thrust ball bearing after being pressed by the helical gear sleeve 9. An elastic element 6 is arranged between the torque inner sleeve 3 and the torque outer sleeve 7, and the PCB is arranged on the torque outer sleeve 7 and keeps static relative to the shaft 4. The Hall sensor is arranged on the PCB and senses the magnetic field change when the magnetic steel 2 moves, and the magnetic steel 2 is arranged on the torque inner sleeve 3 and axially moves along the axial direction along with the torque inner sleeve 3. The output shaft 1 is connected with an end cover 10 through a second bearing, the hub 5 is connected with the shaft 4 through a first bearing, and the hub 5 is connected with the end cover 10 through a screw 11.
This embodiment can be used to electric bicycle, when the user tramples the pedal, exert moment on output shaft 1, make output shaft 1 rotate, drive helical gear cover 9 and rotate, drive end cover 10 and rotate, drive wheel hub 5 and rotate, because output shaft 1 receives the effect of external load, can produce the moment that rotates opposite direction, this opposite moment transmits to helical gear cover 9, helical gear cover 9 produces axial force and axial displacement under effort and reaction force's effect, promote sliding sleeve 8, thrust ball bearing and moment endotheca 3 and produce axial displacement, ripple spring, elastic element 6 are compressed. The magnetic steel 2 generates axial displacement along with the inner sleeve 3, and the Hall sensor senses the change of the magnetic field and outputs a signal. The larger the user's pedaling torque, the larger the deformation of the bellows spring and the elastic element 6, and the larger the axial displacement of the torque inner sleeve 3. When the user stops stepping on the pedal, the moment on the output shaft 1 disappears, and the moment inner sleeve 3 is restored to the initial position under the elastic force action of the corrugated spring and the elastic element 6. The output shaft 1 rotates to drive the bevel gear sleeve 9 to rotate, the magnetic steel 2 rotates to generate a rotating N, S-pole magnetic field, and the Hall sensor outputs an orthogonal signal.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111217298.8A CN113911256B (en) | 2021-10-19 | 2021-10-19 | Wheel torque sensor, working method and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111217298.8A CN113911256B (en) | 2021-10-19 | 2021-10-19 | Wheel torque sensor, working method and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN113911256A true CN113911256A (en) | 2022-01-11 |
| CN113911256B CN113911256B (en) | 2025-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111217298.8A Active CN113911256B (en) | 2021-10-19 | 2021-10-19 | Wheel torque sensor, working method and vehicle |
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| CN (1) | CN113911256B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115158524A (en) * | 2022-06-07 | 2022-10-11 | 深圳市大鱼智行科技有限公司 | Driving device of torque-assisted electric vehicle |
| CN115158523A (en) * | 2022-06-07 | 2022-10-11 | 深圳市大鱼智行科技有限公司 | Power assisting device of electric bicycle with middle-arranged motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160176475A1 (en) * | 2013-08-26 | 2016-06-23 | Theodor Piele | Wheel hub transmission unit for a drive wheel of a vehicle, drive wheel, and vehicle having an auxiliary drive |
| CN210478939U (en) * | 2019-06-18 | 2020-05-08 | 深圳市森浦精机科技有限公司 | Hub motor of electric bicycle |
| CN111169588A (en) * | 2020-01-06 | 2020-05-19 | 安乃达驱动技术(上海)股份有限公司 | Moment pedal frequency sensor suitable for electric power-assisted bicycle |
| CN215883964U (en) * | 2021-10-19 | 2022-02-22 | 安乃达驱动技术(上海)股份有限公司 | Hub torque sensing device and vehicle |
-
2021
- 2021-10-19 CN CN202111217298.8A patent/CN113911256B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160176475A1 (en) * | 2013-08-26 | 2016-06-23 | Theodor Piele | Wheel hub transmission unit for a drive wheel of a vehicle, drive wheel, and vehicle having an auxiliary drive |
| CN210478939U (en) * | 2019-06-18 | 2020-05-08 | 深圳市森浦精机科技有限公司 | Hub motor of electric bicycle |
| CN111169588A (en) * | 2020-01-06 | 2020-05-19 | 安乃达驱动技术(上海)股份有限公司 | Moment pedal frequency sensor suitable for electric power-assisted bicycle |
| CN215883964U (en) * | 2021-10-19 | 2022-02-22 | 安乃达驱动技术(上海)股份有限公司 | Hub torque sensing device and vehicle |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115158524A (en) * | 2022-06-07 | 2022-10-11 | 深圳市大鱼智行科技有限公司 | Driving device of torque-assisted electric vehicle |
| CN115158523A (en) * | 2022-06-07 | 2022-10-11 | 深圳市大鱼智行科技有限公司 | Power assisting device of electric bicycle with middle-arranged motor |
| CN115158524B (en) * | 2022-06-07 | 2024-01-05 | 深圳市大鱼智行科技有限公司 | Moment power-assisted electric vehicle driving device |
| CN115158523B (en) * | 2022-06-07 | 2024-03-01 | 深圳市大鱼智行科技有限公司 | Electric bicycle booster unit with centrally-mounted motor |
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| Publication number | Publication date |
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| CN113911256B (en) | 2025-01-21 |
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