CN205539049U - Take intelligent sensor's wheel hub bearing unit - Google Patents

Abstract

The utility model relates to a take intelligent sensor's wheel hub bearing unit, its structure includes ring flange, inner circle, outer lane and casing, be provided with the inner circle on the ring flange, interior circling is equipped with the magnetism circle, be provided with the casing on the outer lane, be connected with the fixing base on the casing, be equipped with contact pin and detection module on the fixing base, detection module cooperatees with the magnetism circle, be equipped with sensing chip and output circuit among the detection module, a last hall probe, the 2nd hall probe, the 3rd hall probe and the probe circuit of being equipped with of sensing chip, its direction information and speed information that can independently detect and export the vehicle, and have the characteristics of high integrated, high accuracy and high stability.

Description

A kind of hub-bearing unit of band intelligence sensor

Technical field

This utility model relates to a kind of hub-bearing unit, the hub bearing of a kind of band intelligence sensor Unit.

Background technology

Traditional hub-bearing unit uses passive type abs sensor to be produced by coil, magnetic conductor and Magnet Sinusoidal wave analog voltage signal, but when low speed (pinion rotation is slow), the amplitude of its output signal is less than The change in voltage that can be detected by, thus passive type abs sensor is in failure state when low speed；Therefore Occur in that active type ABS sensor based on Hall element, this kind of sensor can export more stable voltage Amplitude, can identify low speed signal, but active type ABS sensor None-identified direction signal, cause car Occur cannot being found in time when the situation such as such as slipping by slope.

China application publication number CN103808960A discloses a kind of rotating speed measuring rotating shaft and the device in direction And method, it is at strong and weak magnetic field two Hall elements of alternate location arrangements, when tachometer disc rotates, by it In the Hall element level conditions that another Hall element is in when being in saltus step judge rotation direction.But The program applies in vehicle ABS sensor that there are the following problems: 1, the phase para-position of two Hall elements Put and require too high thus drastically increase installation difficulty, and during vehicle is kept in motion, even if accurately pacifying Dress also cannot ensure that vehicle does not offsets in operation process, although if two Hall elements in theory The incomplete same direction signal that all can draw of saltus step within a cycle, but require that circuit adapts to not stop to become The hop period changed, its complexity can be substantially increased and stability also cannot ensure；2, conventional Hall sensor Precision relatively low and be easily disturbed, the detection numerical value of two Hall elements is separate, if in gear Certain tooth go wrong or wherein a Hall element by external interference, circuit cannot resoluting signal the most normal Consequently, it is possible to draw the opposite way round information.

Utility model content

Technical problem to be solved in the utility model is to provide the hub bearing list of a kind of band intelligence sensor Unit, it can with independent detection the directional information exporting vehicle and velocity information, and have highly integrated, high-precision Degree and the feature of high stability.

This utility model solves above-mentioned technical problem and be the technical scheme is that

A kind of hub-bearing unit of band intelligence sensor, its structure includes ring flange, inner ring, outer ring and housing, Being provided with inner ring on described ring flange, described inner ring is provided with magnetic circle, and described outer ring is provided with housing, Connecting on described housing has fixing seat, described fixing seat to be provided with contact pin and detection module, described detection module Match with magnetic circle, described detection module is provided with induction chip and output circuit, on described induction chip It is provided with the first hall probe, the second hall probe, the 3rd hall probe and probe circuit, described first Hall Probe and the second hall probe receive differential signal, and described 3rd hall probe receives and judges signal；Described spy Head circuit is according to differential signal and judges that signal forms directional information, and described directional information is defeated by output circuit Go out.Hub-bearing unit with intelligence sensor by arrange on induction chip the first hall probe, second Hall probe, the 3rd hall probe are also connected by probe circuit, make the hub bearing list of band intelligence sensor Unit can complete the judgement in direction by adjusting the spacing between itself and magnetic circle, it is not necessary to adjusts between multiple probe again Position relationship, convenient install and in vehicle motor process, testing result will not be affected because thinking by a small margin； By arrange the first hall probe and the second hall probe formed differential signal again with the judgement of the 3rd hall probe Signal compares, and improves the voltage magnitude of signal, it is ensured that the precision of speed and readable range, and decreases Disturbed condition.

Further, described 3rd hall probe is arranged on the road between the first hall probe and the second hall probe In footpath.3rd hall probe is arranged between path the overall volume reducing chip, and ensure that judgement signal Identical saltus step is not formed with differential signal.

As preferably, described 3rd hall probe is arranged on the road between the first hall probe and the second hall probe Footpath central point.3rd hall probe is arranged on path center promise circuit just can obtain outgoing direction in half period Information.

As preferably, the spacing range between described first hall probe and the second hall probe is 2.5～5mm. Setting, winding displacement and the magnetic of effect of distance the 3rd hall probe between the first hall probe and the second hall probe Turn separation, selection 2.5～5mm is the most suitable.

Further, described probe circuit includes direction analog-digital converter and digital circuit, described differential signal With judge that signal forms directional information after direction analog-digital converter and digital circuit.Described judgement signal and difference Sub-signal average is passed through direction analog-digital converter and is believed by forming direction after digital circuit digitized after comparing Breath is sent out and is forwarded to output coder, carries out information transmission by contact pin and external device.

As preferably, described digital circuit exports two kinds of different square waves of ripple width as directional information, described side The ripple of ripple is wide to be all higher than equal to 90 μ s, and the wide difference of ripple of two kinds of square waves is more than or equal to 90 μ s.For convenience of directional information Reading ripple is wide and the wide poor setting of ripple should be greater than equal to 90 μ s.

Further, described probe circuit also includes speed A/D converter and digital circuit, and described difference is believed Form velocity information number after speed A/D converter and digital circuit.Speed A/D converter and digital circuit Can be by the wavelength ripple frequency output speed information of differential signal.

As preferably, described probe circuit also includes filtering circuit and amplifying circuit, and described differential signal passes through Velocity information is formed after filter and amplification.Differential signal forms standard block after filtering and amplifying, and improves signal Precision.

As preferably, described output circuit is provided with electric capacity.Electric capacity is provided for protecting induction chip.

This utility model compared with the existing technology has the following advantages and effect: the hub spindle of band intelligence sensor Bearing unit is by arranging the first hall probe, the second hall probe, the 3rd hall probe also on induction chip Connected by probe circuit, make the hub-bearing unit of band intelligence sensor by adjusting between itself and magnetic circle Spacing can complete the judgement in direction, it is not necessary to adjusts the position relationship between multiple probe again, convenient installs and not Testing result can be affected because thinking by a small margin in vehicle motor process；By arrange the first hall probe, The position relationship of the second hall probe and the 3rd hall probe makes the structure of induction chip the most reasonable and stability Higher；The change of detectable signal and circuit makes the hub-bearing unit of band intelligence sensor have high accuracy and height The feature of stability, thus it is applicable to vehicle detection.

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below by right In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that below, Accompanying drawing in description is only embodiments more of the present utility model, for those of ordinary skill in the art, On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is structural representation of the present utility model

Fig. 2 is the structural representation of intelligence sensor.

Fig. 3 is the circuit diagram of intelligence sensor.

Fig. 4 is the structural representation of induction chip.

Fig. 5 be induction chip with magnetic circle coordinate schematic diagram.

Fig. 6 is the structural representation of probe circuit.

Fig. 7 a is signal output waveform during gear ring left-hand rotation.

Fig. 7 b is signal output waveform during gear ring right-hand rotation.

Label declaration:

Housing 1 fixes seat 2 contact pin 3

Induction chip 4 first hall probe 41 second hall probe 42

3rd hall probe 43 magnetic circle 5 ring flange 6

Inner ring 7 outer ring 8

Detailed description of the invention

Being described in further detail this utility model below in conjunction with embodiment, following example are to this reality With novel explanation, this utility model is not limited to following example.

Embodiment 1:

As illustrated in fig. 1 and 2, the present embodiment is made up of ring flange 6, inner ring 7, outer ring 8 and housing 1, method It is pressed with inner ring 7 on blue dish 6, is provided with rolling element and retainer between inner ring 7 and outer ring 8 for relatively rotating, Being pressed with magnetic circle 5 on the end of inner ring 7, housing 1 interference is arranged on inside outer ring 8, and housing 1 is fixed with Fixing seat 2, is provided with contact pin 3, induction chip 4 and circuit in fixing seat 2, wherein circuit includes probe electricity Road and output circuit, induction chip 4 match with magnetic circle 5 merging bending weld with contact pin 3, fix seat 2 It is Sumitomo 6188-4797 with the model of contact pin 3.As it is shown on figure 3, circuit is by induction chip 4 and probe electricity Road is formed signal and is exported by output circuit, the wherein resistance Rm=75 Ω/5W in output circuit, electric capacity C=1nF/1000V.

Fig. 4 is to as described in 5, and induction chip 4 is provided with first hall probe the 41, second hall probe 42 and 3rd hall probe 43, the first hall probe 41 and the second hall probe 42 are at a distance of 2.5mm, the 3rd Hall Probe 43 is arranged on the center between the first hall probe 41 and the second hall probe 42, the 3rd hall probe 43 The ideal position long limit away from induction chip 4 be 1.44mm, the broadside away from induction chip 4 is 2.67mm. Induction chip 4 is arranged at magnetic circle 5 air gap 1～3mm when operating, makes induction chip 4 and magnetic circle 5 Perpendicular tangent line and the first hall probe the 41, second hall probe 42 and the 3rd hall probe 43 central point Connect the straight line formed parallel, so that induction chip 4 can detect the rotation information of magnetic circle 5.Sense Answering the probe circuit structure on chip 4 as shown in Figure 6, wherein the first hall probe 41 obtains signal L, the Two hall probes 42 obtain signal R, and the 3rd hall probe 43 obtains signal C, and forms difference by L, R Sub-signal also becomes direction signal X with signal C-shaped, and this process is that prior art is not described in detail in this, as passed through The average of comparison L and R and the relation of C: X=(L+R)/2-C define direction signal, and X passes through direction mould Number converter (direction A/D) enters digital circuit and carries out DSP digitized, during the phase place of signal is entered Directional information after row is analyzed and will be analyzed is forwarded to output coder, when magnetic circle 5 is from the first hall probe 41 export (DR-L) signal when the second hall probe 42 rotates；Otherwise (DR-R) is turned right in output Signal, the most as illustrated in figs. 7 a and 7b, (DR-L) signal that turns left is that high electric current is the square wave of 90 μ s and right Turn (DR-R) signal be high electric current be the square wave of 180 μ s, thus allow external equipment reading side by contact pin 3 To information.It addition, differential signal Negotiation speed analog-digital converter (speed A/D) that L, R are formed sends to The DSP digitized of circuit, digitized signal is output speed information after amplifying, filtering.

Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts and components Shape, be named title etc. can be different.All according to structure, feature and the principle described in this utility model inventional idea The equivalence done or simple change, be all included in the protection domain of this utility model patent.This utility model Described specific embodiment can be made various amendment or supplement by person of ordinary skill in the field Or use similar mode to substitute, without departing from structure of the present utility model or surmount the claims Defined scope, all should belong to protection domain of the present utility model.

Claims (9)

1. a hub-bearing unit for band intelligence sensor, including ring flange, inner ring, outer ring and housing, Being provided with inner ring on described ring flange, described inner ring is provided with magnetic circle, and described outer ring is provided with housing, Connecting on described housing has fixing seat, described fixing seat to be provided with contact pin and detection module, described detection module Match with magnetic circle, it is characterised in that: described detection module is provided with induction chip and output circuit, institute State induction chip and be provided with the first hall probe, the second hall probe, the 3rd hall probe and probe circuit, Described first hall probe and the second hall probe receive differential signal, and described 3rd hall probe receives and judges Signal；Described probe circuit is according to differential signal and judges that signal forms directional information, and described directional information is led to Cross output circuit output.

The hub-bearing unit of band intelligence sensor the most according to claim 1, it is characterised in that: institute State the 3rd hall probe to be arranged in the path between the first hall probe and the second hall probe.

The hub-bearing unit of band intelligence sensor the most according to claim 2, it is characterised in that: institute State the path center point that the 3rd hall probe is arranged between the first hall probe and the second hall probe.

4. according to the hub-bearing unit of the arbitrary described band intelligence sensor of claims 1 to 3, its feature It is: the spacing range between described first hall probe and the second hall probe is 2.5～5mm.

The hub-bearing unit of band intelligence sensor the most according to claim 1, it is characterised in that: institute State probe circuit and include direction analog-digital converter and digital circuit, described differential signal and judge that signal is through direction Directional information is formed after analog-digital converter and digital circuit.

The hub-bearing unit of band intelligence sensor the most according to claim 5, it is characterised in that: institute The square waves stating digital circuit two kinds of ripple width of output different are all higher than as directional information, the ripple width of described square wave In 90 μ s, the wide difference of ripple of two kinds of square waves is more than or equal to 90 μ s.

7. according to the hub-bearing unit of the band intelligence sensor described in claim 5 or 6, it is characterised in that: Described probe circuit also includes that speed A/D converter and digital circuit, described differential signal turn through speed A/D Velocity information is formed after parallel operation and digital circuit.

The hub-bearing unit of band intelligence sensor the most according to claim 7, it is characterised in that: institute Stating probe circuit and also include filtering circuit and amplifying circuit, described differential signal forms speed after filtering and amplifying Degree information.

The hub-bearing unit of band intelligence sensor the most according to claim 1, it is characterised in that: institute State and output circuit is provided with electric capacity.