CN212871083U - Linear displacement sensor and brake booster and electric automobile using same - Google Patents
Linear displacement sensor and brake booster and electric automobile using same Download PDFInfo
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- CN212871083U CN212871083U CN202021758626.6U CN202021758626U CN212871083U CN 212871083 U CN212871083 U CN 212871083U CN 202021758626 U CN202021758626 U CN 202021758626U CN 212871083 U CN212871083 U CN 212871083U
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- permanent magnet
- brake booster
- displacement sensor
- linear displacement
- moving part
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Abstract
The utility model provides a linear displacement sensor and use its brake booster, electric automobile, relates to electric automobile accessory technical field, and its displacement signal that can realize the little stroke is to the conversion of signal of telecommunication, converts the motion signal in the brake booster mechanism into the signal of telecommunication to effectively guarantee higher ground sensing precision and reliability. In the linear displacement sensor of the utility model, the linear displacement sensor senses the change of the magnetic field through the Hall chip so as to measure the displacement of the moving part and adopts a double-path signal complementary output mode; the Hall chip is welded on the printed circuit board, is fixed in the mounting groove of the chip mounting plate through the metal terminal, and is encapsulated by silica gel; the permanent magnet is positioned in the induction range of the Hall chip and is encapsulated on the permanent magnet mounting shell by using epoxy glue, and the permanent magnet mounting shell is fixed on the moving part.
Description
Technical Field
The utility model relates to an electric automobile accessory technical field particularly, relates to a linear displacement sensor and use its brake booster, electric automobile.
Background
It is well known that braking of conventional internal combustion engine vehicles is accomplished by means of a vacuum booster and the required vacuum source is provided by engine power. However, in the electric vehicle, since there is no engine, the vacuum source is lost, and braking can be completed only by mounting a vacuum pump.
With the rapid growth of the new energy automobile market in China, the requirements of host plants and terminal consumers on new brake systems are continuously improved, such as high brake performance, adjustable pedal characteristics, integration advantages and the like.
To address these issues, electromechanical brake boosters that do not rely on a vacuum source: an intelligent booster iBooster is produced by the operation. The working principle of the booster can be simplified into that a pedal connecting rod system converts a motion signal of a pedal into an electric signal through a linear displacement sensor and transmits the electric signal to an electric control unit, and the electric control unit finishes braking through a braking system.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a linear displacement sensor and use its brake booster, electric automobile, its displacement signal that can realize the little stroke is the signal of telecommunication to the conversion of signal of telecommunication, converts the motion signal in the brake booster mechanism into the signal of telecommunication to effectively guarantee higher ground sensing precision and reliability.
The utility model discloses a realize like this:
a linear displacement sensor, comprising: the permanent magnet fixing device comprises a permanent magnet, a Hall chip, a chip mounting plate, a printed circuit board and a permanent magnet mounting shell; the linear displacement sensor senses the change of a magnetic field through the Hall chip so as to measure the displacement of the moving part and adopts a two-way signal complementary output mode;
the Hall chip is welded on the printed circuit board, is fixed in the mounting groove of the chip mounting plate through a metal terminal, and is encapsulated by silica gel, so that the heat dissipation and protection effects on electronic components are achieved; the permanent magnet is positioned in the induction range of the Hall chip and is encapsulated on the permanent magnet mounting shell by using epoxy glue, so that the permanent magnet is fixed, isolated and protected, and the permanent magnet mounting shell is fixed on the moving part.
In the preferred linear displacement sensor of the present invention, after the chip mounting plate and the permanent magnet mounting housing are respectively fixed to the main body and the moving part of the brake booster, the surface plane of the hall chip is parallel to the surface plane of the permanent magnet, and the distance between the parallel planes is about 2 mm; when the permanent magnet moves along with the moving part, the moving track of the permanent magnet is parallel to the center line of the Hall chip and exists in the parallel plane, and the position relation between the middle point of the track of the permanent magnet and the induction point of the Hall chip is that the connecting line of the two points is vertical to the plane where the two points are located.
The utility model discloses among the linear displacement sensor of preferred, the permanent magnet follows moving part moves between starting point and terminal point, and total stroke is not more than 5mm all the time.
A brake booster, comprising: a linear displacement sensor according to any one of the above claims; the permanent magnet installation shell is fixed with the moving part through an assembly groove, and the moving part is a moving part of the brake booster.
The utility model discloses in the brake booster of preferred, the chip mounting panel with brake booster's main part is fixed.
In the preferred embodiment of the present invention, the printed circuit board is connected to the circuit element of the brake booster through the PIN of the metal terminal.
An electric vehicle, comprising: a linear displacement sensor according to any one of the above claims; or a brake booster as described in any of the above.
The utility model has the advantages that: when the brake booster works, a pedal connecting rod system provides a small-stroke (preferably within 5 mm) displacement for a permanent magnet fixed on a moving part in the booster, the relative position of a Hall chip in a magnetic field generated by the permanent magnet is changed while the permanent magnet generates the displacement, so that the Hall voltage is changed, a voltage signal of millivolt (mV) level is output by a Hall element, signal processing is performed through a circuit system, a linear characteristic curve is output, the displacement signal of the permanent magnet is calibrated, and the movement information of the permanent magnet is reflected when the output change signal is continuous, so that the purposes of movement signal input and electric signal output of a linear displacement sensor are fulfilled; that is the utility model provides a linear displacement sensor to the displacement change is surveyed to hall reaction principle, and through the complementary output of double-circuit signal, thereby effectively increases displacement sensor's precision and reliability.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic view of an installation structure of a hall chip in a linear displacement sensor provided in an embodiment of the present invention;
fig. 2 is a schematic view of an installation structure of a permanent magnet in a linear displacement sensor according to an embodiment of the present invention;
fig. 3 is a schematic view of an installation structure of a permanent magnet of a linear displacement sensor in a brake booster according to an embodiment of the present invention;
fig. 4 is a schematic view of a state in which a permanent magnet of a linear displacement sensor in a brake booster provided by an embodiment of the present invention is at a starting point;
fig. 5 is a schematic diagram of a state in which a permanent magnet of a linear displacement sensor in a brake booster provided by an embodiment of the present invention is in a terminal position.
In the figure:
1-a permanent magnet; 2-a Hall chip; 3-mounting the chip; 4-a printed circuit board; 5-mounting a permanent magnet on the shell; 6-metal terminals; 31-a mounting groove; 51-an assembly groove; 7-a moving part; 8-circuit elements.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Referring to fig. 1 and 2, the present embodiment provides a linear displacement sensor, which includes: the permanent magnet type Hall sensor comprises a permanent magnet 1, a Hall chip 2, a chip mounting plate 3, a printed circuit board 4 and a permanent magnet mounting shell 5; the linear displacement sensor senses the change of a magnetic field through the Hall chip 2 to measure the displacement of the moving part 7 and adopts a two-way signal complementary output mode;
the Hall chip 2 is welded on the printed circuit board 4, is fixed in the mounting groove 31 of the chip mounting plate 3 through the metal terminal 6, and is encapsulated by silica gel to play a role in heat dissipation and protection of electronic components; the permanent magnet 1 is positioned in the induction range of the Hall chip 2 and is encapsulated on the permanent magnet mounting shell 5 by using epoxy glue to play a role in fixing, isolating and protecting the permanent magnet 1, and the permanent magnet mounting shell 5 is fixed on the moving part 7.
The embodiment of the utility model provides a beneficial effect is: when the permanent magnet 1 generates displacement, the relative position of the Hall chip 2 in a magnetic field generated by the permanent magnet 1 is changed, so that the Hall voltage is changed, the Hall element outputs a millivolt (mV) level voltage signal, the signal processing is carried out through a line system, a linear characteristic curve is output, the displacement signal of the permanent magnet 1 is calibrated, the movement information of the permanent magnet 1 is reflected when the output change signal is continuous, the purposes of movement signal input and electric signal output of the linear displacement sensor are fulfilled, namely, the displacement change is measured according to the Hall reaction principle, and the two-way signal complementary output is carried out, so that the precision and the reliability of the displacement sensor are effectively improved.
Specifically, hall chip 2's position is fixed in the mounting groove 31 of chip mounting panel 3 in the casing to use silica gel to embedment it, thereby play the guard action to chip and circuit board, can also play anticorrosive and radiating effect simultaneously.
Specifically, the permanent magnet 1 is assembled in a permanent magnet mounting shell 5 made of a plastic material and used for generating a magnetic field required by the sensor, and the gap is filled with epoxy glue, so that the position of the permanent magnet 1 is well fixed, the permanent magnet 1 is isolated, and the effects of corrosion prevention and isolation of ferromagnetic substances are achieved.
Specifically, the permanent magnet mounting case 5 is fixed with the moving part 7 of the brake booster through the fitting groove 51, thereby ensuring that the permanent magnet 1 can always follow the moving part 7 of the brake booster, as shown in fig. 3.
In the preferred embodiment of the present invention, after the chip mounting plate 3 and the permanent magnet mounting housing 5 are respectively fixed to the main body and the moving part of the brake booster, the surface plane of the hall chip 2 and the surface plane of the permanent magnet 1 are arranged in parallel, and the distance between the parallel planes may be preferably 2mm, as shown in fig. 4 and 5; when the permanent magnet 1 moves along with the moving part 7, the moving track of the permanent magnet 1 is parallel to the central line of the Hall chip 2 and exists in the parallel plane, and the position relation from the middle point of the track of the permanent magnet 1 to the induction point of the Hall chip 2 is that the connecting line of the two points is vertical to the plane where the two points are located.
The utility model discloses among the linear displacement sensor of preferred, at permanent magnet 1 along with brake booster's moving part 7 in the motion process, relative displacement takes place for hall chip 2 and permanent magnet 1, and hall chip 2 changes in the relative position in the magnetic field that permanent magnet 1 produced, and permanent magnet 1 follows moving part 7 and moves between starting point and terminal point, and total stroke is not more than 5mm all the time, as shown in fig. 4 and 5.
The present embodiment provides a brake booster, which includes: a linear displacement sensor according to any one of the above claims; as shown in fig. 3, the permanent magnet mounting case 5 is fixed with the moving part 7 by the fitting groove 51, and the moving part 7 is a moving part of the brake booster.
When the brake booster is operating, a small stroke (preferably within 5 mm) of displacement of the permanent magnet 1, which is fixed to the moving part of the booster (i.e. at the moving part 7), can be provided by the pedal connecting rod system.
The utility model discloses among the brake booster of preferred, above-mentioned chip mounting panel 3 is fixed with brake booster's main part.
In the preferred brake booster of the present invention, the printed circuit board 4 can be connected to the circuit element 8 of the brake booster through the PIN of the metal terminal, as shown in fig. 4 and 5.
The PIN is a metal substance used to conduct electricity (signal) in the connector.
The embodiment provides an electric automobile, it includes: a linear displacement sensor according to any one of the above claims; or a brake booster as described in any of the above.
The embodiment of the utility model provides a little stroke linear displacement sensor, and use its intelligent brake booster and electric automobile in, change in magnetic field can be sensed to hall chip 2, and the voltage signal of output millivolt (mV) level carries out signal processing through the line system, exports linear characteristic curve to this displacement of reflecting permanent magnet 1, just also converts the displacement information of moving part 7 into electric signal output from this.
To sum up, the embodiment of the utility model provides a simple structure, it is low to make the degree of difficulty, and output signal is stable, the linear displacement sensor of the novel little stroke with low costs, and use its intelligent brake booster and electric automobile.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A linear displacement sensor, comprising: the permanent magnet fixing device comprises a permanent magnet, a Hall chip, a chip mounting plate, a printed circuit board and a permanent magnet mounting shell; the linear displacement sensor senses the change of a magnetic field through the Hall chip so as to measure the displacement of the moving part and adopts a two-way signal complementary output mode;
the Hall chip is welded on the printed circuit board, is fixed in the mounting groove of the chip mounting plate through a metal terminal, and is encapsulated by silica gel;
the permanent magnet is positioned in the induction range of the Hall chip and is encapsulated on the permanent magnet mounting shell by using epoxy glue, and the permanent magnet mounting shell is fixed on the moving part.
2. The linear displacement sensor of claim 1, wherein a surface plane of the hall chip is disposed parallel to a surface plane of the permanent magnet;
when the permanent magnet moves along with the moving part, the moving track of the permanent magnet is parallel to the center line of the Hall chip and exists in a parallel plane, and the position relation between the middle point of the track of the permanent magnet and the induction point of the Hall chip is that the connecting line of the two points is vertical to the plane where the two points are located.
3. The linear displacement sensor of claim 1 or 2, wherein the permanent magnet follows the moving part between a starting point and an end point, and the total stroke is always no more than 5 mm.
4. A brake booster, comprising: a linear displacement sensor according to any one of claims 1 to 3;
the permanent magnet installation shell is fixed with the moving part through an assembly groove, and the moving part is a moving part of the brake booster.
5. A brake booster as set forth in claim 4 wherein said chip mounting plate is fixed with the body of the brake booster.
6. A brake booster as claimed in claim 4 or 5, wherein the printed circuit board is connected to the circuit components of the brake booster by means of metal terminal PIN PINs.
7. An electric vehicle, comprising: a linear displacement sensor according to any one of claims 1 to 3;
or a brake booster according to any one of the preceding claims 4 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021758626.6U CN212871083U (en) | 2020-08-21 | 2020-08-21 | Linear displacement sensor and brake booster and electric automobile using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021758626.6U CN212871083U (en) | 2020-08-21 | 2020-08-21 | Linear displacement sensor and brake booster and electric automobile using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212871083U true CN212871083U (en) | 2021-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021758626.6U Active CN212871083U (en) | 2020-08-21 | 2020-08-21 | Linear displacement sensor and brake booster and electric automobile using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212871083U (en) |
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- 2020-08-21 CN CN202021758626.6U patent/CN212871083U/en active Active
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