CN103376335A

CN103376335A - Vehicle velocity sensor

Info

Publication number: CN103376335A
Application number: CN2012101320417A
Authority: CN
Inventors: 康钰京; 苏国信
Original assignee: JIDI DEVELOPMENT Co Ltd; Kwang Yang Motor Co Ltd
Current assignee: JIDI DEVELOPMENT Co Ltd; Kwang Yang Motor Co Ltd
Priority date: 2012-04-28
Filing date: 2012-04-28
Publication date: 2013-10-30

Abstract

A vehicle velocity sensor comprises a sensing unit and a rotating unit. The sensing unit comprises a fixedly assembling piece which is fixed to a front fork of a vehicle, and a sensing piece which is arranged in the fixedly assembling piece. The rotating unit comprises a surrounding piece which is fixed to a hub of one of wheel rims of the vehicle in a close fit mode, and a magnetic sensing piece, wherein the surrounding piece is sleeved with the magnetic sensing piece, and the magnetic sensing piece can rotate relative to the sensing unit and be detected by the sensing piece. The surrounding piece is fixed with each wheel rim in a close fit mode, therefore, screws or fixedly connecting pieces do not need to be additionally used, the space for installing the fixedly connecting pieces can be reduced through the surrounding piece, and complexity of installation is simplified through the close fit.

Description

The car speed sensor

Technical field

The present invention refers to a kind of car speed sensor especially about a kind of sensing apparatus.

Background technology

Consult Fig. 1, be No. the 6958601st, United States Patent (USP) " motorcycle mileage detector ", comprise the magnet ring 112 that set collar 111, on the axle sleeve 121 that a screw lock is fixed in wheel rim 12 is sheathed on this set collar 111, and a protecting cover 113 that is covered on this magnet ring 112, this protecting cover 113 also is fixed in the front fork 13 of motorcycle.Can drive this set collar 111 when wheel rim 12 rotates rotates in the lump, so that these magnet ring 112 relative these protecting cover 113 rotations, the magnetic field that this magnet ring 112 produces alternation when rotating, and the sensing element in this protecting cover 113 can produce according to the magnetic field of alternation induction current, and see through a signal wire 114 and pass, utilize the number of turns of the change calculations rotation of electric current, and then can the calculating mileage number.

But because this set collar 111 is that screw lock is on the axle sleeve 121 of this wheel rim 12, therefore this set collar 111 must will be formed with a spiro-locking section 115, relatively increase volume and the weight of this set collar 111, the oil consumption of vehicle is improved, simultaneously, in assembling, also need a plurality of screws 14 lock respectively, except the branched cost that goes out to use screw 14, more increase the complexity when assembling.

Summary of the invention

Therefore, purpose of the present invention, the car speed sensor that namely is to provide a kind of light weight and simplifies mounting means.

So car speed sensor of the present invention comprises a sense and puts unit and a turn unit.

This sense put the unit comprise one be fixed in this vehicle a front fork be fixedly mounted with part, and one is located at this and is fixedly mounted with induction pieces in the part.This turn unit comprises that one is tightly fixed in the circulate piece of an one of wheel rim of this vehicle wheel hub, and a magnetic strength spare that is sheathed on this circulate piece, and this magnetic strength spare relatively this sense put the unit turn and sensed detecting.

Effect of the present invention is: this circulate piece is to utilize friction tight mode and this wheel rim to fix, and does not therefore need additionally to use screw or fastener, and this circulate piece can reduce the volume that fastener is installed by this, also sees through the complicacy that the incompatible simplification of close-fitting is installed.

Description of drawings

Fig. 1 is a three-dimensional exploded view, United States Patent (USP) is described No. 6958601 " motorcycle mileage detector " patent of invention case;

Fig. 2 is a cut-open view, and a preferred embodiment of car speed sensor of the present invention is described;

Fig. 3 is an exploded view, and the thin section aspect of a turn unit in this preferred embodiment is described; And

Fig. 4 is an exploded view, the aspect of this turn unit of aid illustration.

Embodiment

About aforementioned and other technology contents, characteristics and effect of the present invention, in the detailed description of a following cooperation preferred embodiment with reference to the accompanying drawings, can clearly present.

Consult Fig. 2 and Fig. 3, be a preferred embodiment of car speed sensor of the present invention, comprise a sense and put unit 3 and a turn unit 4.

This sense is put unit 3 and is comprised that a part 31, that is fixedly mounted with that is fixed in a front fork 21 of this vehicle 2 is located at this and is fixedly mounted with induction pieces 32 in the part 31, and one is located at the leakage barriers 33 that this is fixedly mounted with part 31 inner edges.

Consult Fig. 3, Fig. 4, this turn unit 4 comprises that one is tightly fixed in the circulate piece 41 of an one of wheel rim 22 of this vehicle 2 wheel hub 221, and a magnetic strength spare 42 that is sheathed on this circulate piece 41.Part 31 covers that are fixedly mounted with that this magnetic strength spare 42 is put unit 3 by this sense cover, and this sense is put unit 3 turns and sensed 32 detecting relatively.

The circulate piece 41 of this turn unit 4 have one with the wheel hub 221 mutually friction tight surrounding walls 411 of this wheel rim 22, and one extended and block mutually the wall extension 412 of establishing with this magnetic strength spare 42 to opposite these wheel rim 22 directions by this surrounding wall 411.

This surrounding wall 411 has majority and is and extends axially and be halved together and equal angles chimeric projection 413 separately with the wheel hub 221 of this wheel rim 22, and most embeded slots 414 that are surrounded on inner edge and are interlocked with the wheel hub 221 of this wheel rim 22, these embeded slots 414 and these chimeric projections 413 interval, angle ground that is equal to each other.These chimeric projections 413 make this circulate piece 41 not make radial rotating by relative wheel rim 22 with these wheel hub 221 tablings, and this embeded slot 414 is interlocked with this wheel hub 221 this circulate piece 41 can not be moved axially by relative wheel rim 22.

Explanation is in addition, and the internal diameter of the surrounding wall 411 of this turn unit 4 also can be gradually to open towards the direction of this wheel hub 221 to be formed with a tapering, after this surrounding wall 411 embeds this wheel hub 221, can improve friction tight effect between this circulate piece 41 and this wheel hub 221.

Look back Fig. 2 and Fig. 3, in assembling, in wheel hub 221 both sides of the wheel rim 22 of this vehicle 2 bearing 23 to be installed respectively, then be fixed on this turn unit 4 on the wherein side of this wheel hub 221 in friction tight mode, allow afterwards this sense put unit 3 covers and overlay on this turn unit 4, and so that the surrounding wall 411 of this leakage barriers 33 and this turn unit 4 fit, utilize at last a screw rod 24 sequentially to pass front fork 21, wheel rim 22, turn unit 4, unit 3 is put in sense, front fork 21, and utilize a nut 25 fixing, making this sense put unit 3 can't rotate, and rotates and this wheel rim 22 can see through these bearings 23 and drive simultaneously this turn unit 4.

In when vehicle 2 travels, this wheel rim 22 drives this turn unit 4 and rotates, this magnetic strength spare 42 and then rotates and the magnetic field of generation alternation, the effect that unit 3 interior induction pieces 32 namely can be subject to alternating magnetic field is put in the sense that can't rotate, produce induction current, can know the speed that this magnetic strength spare 42 rotates by inference by faradic variation, and then calculate the speed that vehicle 2 travels.

Except this circulate piece 41 and wheel hub 221 are wringing fits and being driven by this wheel rim 22, because chimeric projection 413 and these wheel hub 221 tablings of this circulate piece 41, make this circulate piece 41 not relatively wheel rim 22 produce radial rotatings, therefore when these wheel rim 22 rotations are moving, will certainly drive this turn unit 4 rotations, more provide one to guarantee that this wheel rim 22 can drive the design of this turn unit 4.

Similarly, the embeded slot of this circulate piece 41 414 is interlocked with this wheel hub 221, therefore when this wheel rim 22 rotates, this circulate piece 41 not relatively wheel rim 22 produce and move axially, avoid this circulate piece 41 and this wheel hub 221 disengagings, another safe guarantee is provided.

In addition, the leakage barriers 33 that unit 3 is put in this sense can avoid aqueous vapor or husky mud to infiltrate the gap that 4 of unit 3 and turn unit are put in this sense, and causes the problem that induction is bad or friction force increases.

Therefore, seeing through this turn unit 4 is to be fixed in tightly on this wheel hub 221, so do not need extra screw or locking part, relatively, reducing this turn unit 4 needs the volume of locking, and alleviate the weight of this turn unit 4, and then can reduce the oil consumption of vehicle 2, and need not utilize most locking parts lockings installing, simplify this turn unit 4 and be mounted to step on this wheel hub 221, and the chimeric projection 413 on this circulate piece 41, embeded slot 414 can avoid these circulate piece 41 relative these wheel hubs 221 to produce slip or displacement, and the security mechanism of multiple tracks is provided.

In sum, car speed sensor of the present invention, this turn unit 4 is to be tightly fixed in this wheel hub 221, need not use locking part, therefore and can reduce volume, the weight of turn unit 4, and can simplify the formality of installing, save man-hour and the materials'use installed, so really can reach the present invention's purpose.

The above only is preferred embodiment of the present invention, can not limit scope of the invention process with this, i.e. every simple equivalence of doing according to claims of the present invention and instructions changes and modifies, and all still belongs in the scope that patent of the present invention contains.

Reference numerals list

2 vehicles

21 front forks

22 wheel rims

221 wheel hubs

23 bearings

24 screw rods

25 nuts

The unit is put in 3 senses

31 are fixedly mounted with part

32 induction pieces

33 leakage barriers

4 turn unit

41 circulate pieces

411 surrounding walls

412 wall extensions

413 chimeric projections

414 embeded slots

42 magnetic strength spares.

Claims

1. car speed sensor comprises:

The unit is put in one sense, comprise one be fixed in this vehicle a front fork be fixedly mounted with part, and one is located at this and is fixedly mounted with induction pieces in the part; And

One turn unit comprises that one is tightly fixed in the circulate piece of a wheel hub of a wheel rim of this vehicle, and a magnetic strength spare that is sheathed on this circulate piece, and this magnetic strength spare relatively this sense put the unit turn and sensed detecting.

2. car speed sensor according to claim 1, wherein, the circulate piece of this turn unit have one with the mutually friction tight surrounding wall of this wheel rim, and one extended and block mutually the wall extension of establishing with this magnetic strength spare to opposite this wheel rim direction by this surrounding wall, this surrounding wall has one and is the chimeric projection that extends axially and be halved together with the wheel hub of this wheel rim, this chimeric projection make this circulate piece relatively wheel rim make radial rotating.

3. car speed sensor according to claim 1, wherein, the circulate piece of this turn unit have one with the mutually friction tight surrounding wall of this wheel rim, and one extended to opposite this wheel rim direction by this surrounding wall, and block mutually the wall extension of establishing with this magnetic strength spare, this surrounding wall has a plurality of being and extends axially and be halved together and equal angles chimeric projection separately with the wheel hub of this wheel rim, these chimeric projections make this circulate piece relatively wheel rim make radial rotating.

4. car speed sensor according to claim 2, wherein, this surrounding wall has an embeded slot that is surrounded on inner edge and is interlocked with the wheel hub of this wheel rim, this embeded slot make this circulate piece relatively wheel rim move axially.

5. car speed sensor according to claim 3, wherein, this surrounding wall has a plurality of embeded slots that are surrounded on inner edge and are interlocked with the wheel hub of this wheel rim, these embeded slots and these chimeric projections separately, and this embeded slot make this circulate piece relatively wheel rim move axially.

6. each described car speed sensor in 5 according to claim 1, wherein, the part that is fixedly mounted with that the unit is put in this sense is that cover overlays on outside the magnetic strength spare of this turn unit, and this sense is put the unit and also comprised and be located at the leakage barriers that this is fixedly mounted with the part inner edge and fits with this circulate piece.

7. each described car speed sensor in 5 according to claim 2, wherein, the internal diameter of the surrounding wall of this turn unit is gradually to open towards the direction of this wheel hub, and forms a tapering.