CN209707535U - A kind of speed sensor for electric bicycle - Google Patents
A kind of speed sensor for electric bicycle Download PDFInfo
- Publication number
- CN209707535U CN209707535U CN201920672081.8U CN201920672081U CN209707535U CN 209707535 U CN209707535 U CN 209707535U CN 201920672081 U CN201920672081 U CN 201920672081U CN 209707535 U CN209707535 U CN 209707535U
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- CN
- China
- Prior art keywords
- locating cover
- permanent magnetic
- magnetic plate
- electric bicycle
- machine shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a kind of speed sensor for electric bicycle, including machine shaft, motor housing and magneto-resistive transducing device assembly, the magneto-resistive transducing device assembly includes permanent magnetic plate, detection chip and locating cover, the permanent magnetic plate is circular slab, and the edge of permanent magnetic plate is connected with abutment sleeve, the abutment sleeve covers one end in machine shaft and is connected by screw with machine shaft；The locating cover covers permanent magnetic plate, and locating cover is detachably connected with motor housing, and the detection chip is arranged inside locating cover, and the center line of detection chip is overlapped with the center line of permanent magnetic plate.The utility model uses the revolving speed of magnetoresistive sensor component detection motor, and for magneto-resistive transducing device assembly compared with hall speed sensor, detection accuracy is higher, and compared with rotary transformer, cost is lower, can match well with electric bicycle.
Description
Technical field
The utility model belongs to sensor field, especially a kind of speed sensor for electric bicycle.
Background technique
Velocity sensor be for detecting motor speed, it is existing to calculate the device of electric bicycle travel speed
Velocity sensor is usually used Hall sensor, hall speed sensor it is cheap, but resolution ratio is low, detection accuracy
It is poor, and occupied space is larger.Part electric vehicle also uses rotary transformer, and the detection accuracy of this sensor is high, occupies empty
Between it is small, but cost is very high.
Utility model content
The purpose of this utility model is to provide a kind of detection accuracy, higher and lower-cost electrical salf-walking vehicle speed is passed
Sensor.
Purpose of the utility model is realized as follows: a kind of speed sensor for electric bicycle, including machine shaft, electricity
Machine shell and magneto-resistive transducing device assembly, the magneto-resistive transducing device assembly include permanent magnetic plate, detection chip and locating cover, the permanent magnetism
Plate is circular slab, and the edge of permanent magnetic plate is connected with abutment sleeve, and the abutment sleeve covers one end in machine shaft and passes through
Screw is connected with machine shaft；The locating cover covers permanent magnetic plate, and locating cover is detachably connected with motor housing, the detection
Chip is arranged inside locating cover, and the center line of detection chip is overlapped with the center line of permanent magnetic plate.
Further, the inner sidewall of the locating cover is provided with columnar mounting cylinder, the center line of the mounting cylinder with
The center line of machine shaft is overlapped, and the mounting cylinder is connected with the adjustment barrel being threadedly engaged with mounting cylinder, and the detection chip is set
Set one end in adjustment barrel close to machine shaft.
Further, inner wall of the adjustment barrel close to one end of machine shaft is provided with support plate, the detection chip
It is fixed on the supporting plate by gland, the gland is threadedly coupled with adjustment barrel, and centre bore is provided on gland, described
The diameter of centre bore is greater than the outer diameter of abutment sleeve, so that abutment sleeve can extend into centre bore.
Further, the elastic cushion of circular ring shape is provided between the gland and detection chip.
Further, the locating cover is connected by screw with motor housing.
Further, gasket is provided between the locating cover and motor housing.
Further, the threading hole being connected to installation tube inner chamber is provided on the locating cover.
The beneficial effects of the utility model are: the utility model uses the revolving speed of magnetoresistive sensor component detection motor, magnetic
Sensor module is hindered compared with hall speed sensor, and detection accuracy is higher, and compared with rotary transformer, cost is lower, can
It is matched well with electric bicycle.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of speed sensor for electric bicycle of the utility model, including machine shaft 1, motor housing
2 and magneto-resistive transducing device assembly, the magneto-resistive transducing device assembly include permanent magnetic plate 3, detection chip 4 and locating cover 5, the permanent magnetic plate
3 be circular slab, and the edge of permanent magnetic plate 3 is connected with abutment sleeve 6,6 sets of the abutment sleeve machine shaft 1 one end and lead to
Screw is crossed to be connected with machine shaft 1；The locating cover 5 covers permanent magnetic plate 3, and locating cover 5 is detachably connected with motor housing 2,
The detection chip 4 is arranged inside locating cover 5, and the center line of detection chip 4 is overlapped with the center line of permanent magnetic plate 3.
Machine shaft 1 and motor housing 2 are existing electric bicycle motor component.Detection chip 4 is matched with permanent magnetic plate 3
It closes, permanent magnetic plate 3 is fixed on machine shaft 1, enable permanent magnetic plate 3 that machine shaft 1 to be followed to rotate synchronously, and detection chip 4
Be mounted on motor housing 2 by locating cover 5, it is opposing stationary, can detect permanent magnetic plate 3 movement, and by the displacement of permanent magnetic plate 3,
The non-electrical physical quantity such as revolving speed, acceleration is converted to the sensor of magnetic resistance change rate, then exports corresponding electric signal, realizes to motor
The detection of 1 revolving speed of shaft, and then the form speed of electric bicycle can be calculated.Specifically, the model of detection chip 4 can be
Three dimensional reluctance microcircuit chip (HMC1023), exportable speed and two kinds of direction signal, the every rotation of permanent magnetic plate 3 one week, detect core
Piece 4 exports one group of signal, and the number of signals that detection chip 4 exports in the unit time is more, then 1 revolving speed of machine shaft is bigger, leads to
The number of signals that detection chip 4 exports in the unit of account time is crossed, the travel speed of electric bicycle can be calculated.Work as detection
When chip 4 exports low level, then it represents that machine shaft 1 inverts or stops operating.
Locating cover 5 is connected by screw with motor housing 2, convenient for disassembly and assembly, and locating cover 5 is including cover and is located at covers edge
Turnup structure, when installation, which is bonded with motor housing 2 and loads onto screw.In order to improve dust-proof, waterproof
Effect, is provided with gasket 12 between the locating cover 5 and motor housing 2, rubber pad etc. can be used in gasket 12.
In order to keep the testing result of detection chip 4 more accurate, the distance between detection chip 4 and permanent magnetic plate 3 should be protected
It holds within 10mm, for the ease of adjusting the distance between detection chip 4 and permanent magnetic plate 3, the inner sidewall setting of the locating cover 5
There is columnar mounting cylinder 7, mounting cylinder 7 can be integrally formed with locating cover 5, can also connect with welding.The center of the mounting cylinder 7
Line is overlapped with the center line of machine shaft 1, and the mounting cylinder 7 is connected with the adjustment barrel 8 being threadedly engaged with mounting cylinder 7, the inspection
It surveys chip 4 and adjustment barrel 8 is set close to one end of machine shaft 1.Since adjustment barrel 8 and mounting cylinder 7 are threadedly engaged, rotation is adjusted
When cylinder 8, adjustment barrel 8 can be along the axial movement of mounting cylinder 7, to change the distance between detection chip 4 and permanent magnetic plate 3, in fact
Existing the distance between detection chip 4 and permanent magnetic plate 3 are adjusted.
The inner wall of the one end of the adjustment barrel 8 close to machine shaft 1 is provided with support plate 9, and the detection chip 4 passes through pressure
Lid 10 is pressed abd fixed in support plate 9, and the gland 10 is threadedly coupled with adjustment barrel 8, and is provided with centre bore on gland 10, institute
The diameter for stating centre bore is greater than the outer diameter of abutment sleeve 6, so that abutment sleeve 6 can extend into centre bore.When installation, core will test
Piece 4 is put into adjustment barrel 8 and is bonded with support plate 9, then loads onto gland 10, rotary gland 10, i.e., will using gland 10
Detection chip 4 compresses.In order to guarantee the mounting stability of detection chip 4, gland 10 needs to apply biggish pressure to detection chip 4
Power, detection chip 4 is damaged in order to prevent, and the elastic cushion 11 of circular ring shape is provided between the gland 10 and detection chip 4, elasticity
Relatively soft rubber pad etc. can be used in pad 11, for protecting detection chip 4.
It is provided with the threading hole 13 being connected to 7 inner cavity of mounting cylinder on the locating cover 5, is used for wiring.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (7)
1. a kind of speed sensor for electric bicycle, it is characterised in that: passed including machine shaft (1), motor housing (2) and magnetic resistance
Sensor component, the magneto-resistive transducing device assembly include permanent magnetic plate (3), detection chip (4) and locating cover (5), the permanent magnetic plate (3)
It is connected with abutment sleeve (6) for the edge of circular slab, and permanent magnetic plate (3), the abutment sleeve (6) covers in machine shaft (1)
One end is simultaneously connected by screw with machine shaft (1)；The locating cover (5) covers permanent magnetic plate (3), and locating cover (5) and motor
Shell (2) is detachably connected, and the detection chip (4) setting is internal in locating cover (5), and the center line of detection chip (4) with
The center line of permanent magnetic plate (3) is overlapped.
2. a kind of speed sensor for electric bicycle according to claim 1, it is characterised in that: the locating cover (5)
Inner sidewall is provided with columnar mounting cylinder (7), and the center line of the mounting cylinder (7) is overlapped with the center line of machine shaft (1),
The mounting cylinder (7) is connected with the adjustment barrel (8) being threadedly engaged with mounting cylinder (7), and the detection chip (4) is arranged in adjustment barrel
(8) close to the one end of machine shaft (1).
3. a kind of speed sensor for electric bicycle according to claim 2, it is characterised in that: the adjustment barrel (8) is leaned on
The inner wall of one end of nearly machine shaft (1) is provided with support plate (9), and the detection chip (4) is fixed by gland (10)
On support plate (9), the gland (10) is threadedly coupled with adjustment barrel (8), and centre bore is provided on gland (10), it is described in
The diameter in heart hole is greater than the outer diameter of abutment sleeve (6), so that abutment sleeve (6) can extend into centre bore.
4. a kind of speed sensor for electric bicycle according to claim 3, it is characterised in that: the gland (10) and inspection
Survey the elastic cushion (11) that circular ring shape is provided between chip (4).
5. a kind of speed sensor for electric bicycle according to claim 1, it is characterised in that: the locating cover (5) is logical
Screw is crossed to be connected with motor housing (2).
6. a kind of speed sensor for electric bicycle according to claim 5, it is characterised in that: the locating cover (5) with
Gasket (12) are provided between motor housing (2).
7. a kind of speed sensor for electric bicycle according to claim 2, it is characterised in that: on the locating cover (5)
It is provided with the threading hole (13) being connected to mounting cylinder (7) inner cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920672081.8U CN209707535U (en) | 2019-05-10 | 2019-05-10 | A kind of speed sensor for electric bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920672081.8U CN209707535U (en) | 2019-05-10 | 2019-05-10 | A kind of speed sensor for electric bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209707535U true CN209707535U (en) | 2019-11-29 |
Family
ID=68650808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920672081.8U Active CN209707535U (en) | 2019-05-10 | 2019-05-10 | A kind of speed sensor for electric bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209707535U (en) |
-
2019
- 2019-05-10 CN CN201920672081.8U patent/CN209707535U/en active Active
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