CN101105203B - Rolling bearing with sensor - Google Patents

Rolling bearing with sensor Download PDF

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Publication number
CN101105203B
CN101105203B CN2007101383595A CN200710138359A CN101105203B CN 101105203 B CN101105203 B CN 101105203B CN 2007101383595 A CN2007101383595 A CN 2007101383595A CN 200710138359 A CN200710138359 A CN 200710138359A CN 101105203 B CN101105203 B CN 101105203B
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CN
China
Prior art keywords
sensor
scrambler
outer ring
inner ring
holding part
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Expired - Fee Related
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CN2007101383595A
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Chinese (zh)
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CN101105203A (en
Inventor
青木护
石川宽朗
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NSK Ltd
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NSK Ltd
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Priority claimed from JP2001396916A external-priority patent/JP2003194048A/en
Priority claimed from JP2002022105A external-priority patent/JP4174652B2/en
Priority claimed from JP2002156098A external-priority patent/JP2003344101A/en
Application filed by NSK Ltd filed Critical NSK Ltd
Publication of CN101105203A publication Critical patent/CN101105203A/en
Application granted granted Critical
Publication of CN101105203B publication Critical patent/CN101105203B/en
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Expired - Fee Related legal-status Critical Current

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Abstract

A rolling bearing with sensor has an inner ring, an outer ring, rolling elements rollably disposed between the inner ring and the outer ring, a sensor provided on one of the inner ring and the outer ring and a detection member provided on the other of the inner ring and the outer ring radially opposed to the sensor which is adapted to be sensed by the sensor. A first retaining member is fixed to the outer ring end surface of the outer ring and retains one of the sensor and the detection member. A second retaining member is fixed to the inner ring end surface of the inner ring and retains the other of the sensor and the detection member. At least one of the inner end surface and the outer end surface is arranged so as to be pressed axially without the sensor or the detection member.

Description

The rolling bearing of belt sensor
The application is one and divides an application that the applying date of corresponding female case is on November 18th, 2002, and application number is 02827128.9, and denomination of invention is the rolling bearing and the rotary state detecting device of belt sensor, and the application people is a NSK Ltd..
Technical field
The present invention relates to a kind of rolling bearing of belt sensor, comprise that one detects the sensor of number of revolutions etc., and relate to a kind of rotary state detecting device.
Background technology
Before this, as the rolling bearing of belt sensor, existing JP-A-63-111416, JP-A-7-325098, JP-A-7-311212, the JP-A-10-311740 of being disclosed in, or the like among those.
The rolling bearing that is disclosed in the belt sensor among the JP-A-63-111416 comprises having in opposed two surfaces that are arranged on inner ring and outer ring on any one side, have the magnetic material layer of the predetermined pattern magnetization, and is contained in the magnetic sensor on the another side.Magnetic material layer has along the magnetized spot of a plurality of figures that circumferentially are provided with.
The rolling bearing that is disclosed in the belt sensor among the JP-A-7-325098 comprises the magnetized spot that is arranged on the turning collar like that among the file as described above and is arranged on magnetic sensor on the static circle, and have increasing gap between inner ring and the outer ring so that the space of an increasing to be provided, put magnetized spot and sensor therein.
All these structures all comprise a sensor, and it is contained on the outer ring, and the outer ring is the static circle that has a holding body; And a detection piece, such as a multipole magnet, it is installed on the inner ring, and inner ring is a turning collar.
Next, Figure 45 diagram is disclosed in the rolling bearing 1090 of a kind of belt sensor among the JP-A-7-311212.Rolling bearing 1090 comprises ball 1093, and it rollably is held between outer ring 1091 and the inner ring 1092.On an axial side, seal 1094 is set.Be opposite on the end surface of seal, sensor 1096 is arranged on the outer ring 1091 with holding part 1095, and detection piece 1099 is arranged on the inner ring 1092 with holding part 1098.
The holding part 1095 that is contained on the outer ring 1091 has mounting portion 1095a, and it is fitted on 1091 inside surfaces of outer ring; Flange portion 1095b, it is connected in mounting portion 1095a, and radially outwards stretches; And sensor holds part 1095c, is connected in flange portion 1095b and stretches vertically.Flange portion 1095b covers the entire area of outer ring 1091 end surfaces.Hold at sensor on the inside surface of part 1095c and holding sensor 1096.
The holding part 1098 that is contained on the inner ring 1092 is made to such an extent that have L shaped cross section, comprises the cylindrical shape part, be fitted on inner ring 1092 outside surfaces, and detection piece holds part, radially outwards stretches from the cylindrical shape part; And holding part 1098 holds detection piece 1099 with such configuration, and promptly detection piece 1099 is opposite to sensor 1096 vertically and has gap slightly therebetween.
Generally, the bearing of belt sensor is as a kind of rotary state detecting device of the velocity of rotation, direction or the angle that detect article for rotation such as bearing.Rotary state detecting device comprises a rotation sensor, is arranged on the article for rotation outside, and detection piece, and it periodically is arranged on the surface of article for rotation.Rotation sensor can calculate velocity of rotation, direction and the angle of article for rotation according to the configuration cycle of the sense cycle of test material and test material.
JP-A-9-42994 has disclosed a kind of slewing bearing, and it comprises the single-revolution angle detector.This angle of revolution detecting device comprises a scale and a sensor, is contained in separately on the inner ring and outer ring as bearing race.Scale has each N utmost point and each S utmost point, and they are alternately along the circumferential arrangement of rotating shaft.Sensor is experienced the magnetic force of each N utmost point and each S utmost point to detect the number of times that each pulse signal and number go out pulse signal.Signal converter is angle-data and angles of display data according to the number of times commutation pulse signal of pulse signal.
JP-A-7-218239 has disclosed a kind of bearing with the rotational angle detecting device, comprises a grid graph, is arranged on the turning collar of bearing; A plurality of LED are located opposite to the grid chart board; And the PD of a plurality of detection light, light is sent by a light source and is revised by aforementioned figure.Form a beam spot on each the comfortable light grid graph of light that sends by a plurality of LED.Beam spot is owing to the dark and the bright cyclical variation that partly presents intensity of reflected light of grid graph.A plurality of PD survey the variation of intensity of reflected light separately and calculate rotational angle according to result of detection.
JP-A-7-218248 has disclosed a kind of contact rotation angle detecting device.This rotation angle detecting device comprises an insulation material layer, and it is arranged on the end surface of outer ring; One conductor fig is arranged on the insulation material layer; And a contact, be arranged on the inner ring that is opposite to conductor fig.Contact contacts along with the rotation of article for rotation alternately forms with insulating material with conductor fig.Conductor fig is short circuit and conducting when contacting with contact.Rotation angle detecting device is not by conductor fig detects article for rotation to the conducting of contact rotational angle occur/occurring.
Secondly, JP-A-2000-346673 has disclosed a kind of velocity of rotation pick-up unit, and it comprises magnet, is arranged on the article for rotation periphery; And single magnetic sensor, it is arranged on article for rotation nearby, and detects the magnetic flux that is formed by magnet.Article for rotation has a plurality of N utmost points, the S utmost point and the nonpolar device that is set in sequence in wherein, and magnetic sensor detects the magnetic force of the N utmost point, the S utmost point and nonpolar object, and can detect the velocity of rotation of article for rotation.In addition, magnetic sensor is measured the rotation direction of article for rotation according to the detection order of each magnetic pole (" the N utmost point-S utmost point-nonpolar device " or " the nonpolar device-S utmost point-N utmost point ").This velocity of rotation pick-up unit can utilize single magnetic sensor measure the velocity of rotation of article for rotation and direction and thereby do not need to be provided with therein another sensor, and be favourable reducing aspect the bearing size.
But, shown among Figure 45, place under the situation of device axially pressurized at sensor 1096 so that shown in arrow P, apply load and when being pressed into shell to it like that, departing from may appear in the gap between sensor 1096 and the detection piece 1099, the feasible number of turns that can not accurately detect rotation etc.Secondly, can imposed load P be used for the pilot pressure of rolling bearing 1090, cause the sensor 1096 and the gap of detection piece 1099 to be departed to some extent once in a while with setting.Gap between holding part 1095 and the sensor 1096 also may be damaged or distortion by load p with fixation of sensor 1096 admittedly easily by resin moulded usually.
In addition, because the inner ring and the gap between the outer ring of bearing are less usually, so must make sensor or opposed detection piece do thinlyyer.But, because sensor is provided with to such an extent that with sensor plate formation one is installed, so be difficult to sensor thickness is reduced to predetermined limit or smaller.The JP-A-63-111416 that more than quotes proposes, can be provided be integrated in inner ring or outer ring magnetic material layer to reduce the thickness of detection piece, need special technology but form such one deck, can cause increasing production cost.
The JP-A-7-325098 that more than quotes proposes, can strengthen gap between inner ring and the outer ring simplifying the structure of magnetic sensor or detection piece, but a plurality of sensors of configured in parallel vertically, thereby increased the width of whole bearing.
Secondly, when the rolling bearing that has sensor is arranged on a certain equipment that generates magnetic flux, nearby the time, the magnetic flux that spills from this equipment can influence the circuit that constitutes sensor, causes the mistake running of sensor occasionally such as motor and high frequency electric source.Moreover, make its alternating source via the equipment of its earthing of casing under the situation that the belt sensor rolling bearing that is fixed to the upper uses, if shell is not abundant ground connection, then the voltage of alternating source puts on sensor equally.This is accompanied by the weak current flows through sensor, causes signal of sensor once in a while and results from the noise of supply frequency etc. and mix mutually.
Secondly, under the situation of JP-A-2000-346673, because of storing the out of memory of angle or replacing is dies before beginning to rotate, the angle-data during beginning to rotate may be lost.In the case, disadvantageously, reference position is lost relatively, makes it to calculate absolute angle, unless reset with reference to angle.
Summary of the invention
The rolling bearing that provides a kind of belt sensor of a project of the present invention can keep its very high accuracy of detection, even the end surface of bearing race is consequently pressed in loading thereon.
Another object of the present invention provides a kind of rolling bearing of belt sensor, have a plurality of sensors that are incorporated in wherein, and can have the width that has reduced.
Another purpose of the present invention provides a kind of rolling bearing of belt sensor, can stop such as the such external disturbance of magnetic flux bleed-through to keep very high accuracy of detection.
Another purpose of the present invention provides a kind of bearing that has sensor as rotary state detecting device, and this device has simple structure, can detect velocity of rotation, rotation direction and the absolute angle of an article for rotation when using single-sensor.
In order to realize above-mentioned projects, according to the present invention, improved a kind of rolling bearing of belt sensor, comprising: inner ring and outer ring;
Rolling member rollably is arranged between inner ring and the outer ring;
Sensor, its be arranged on inner ring and outer ring the two one of on;
Detection piece, it is arranged on inner ring and outer ring in the two on another, and diametrically contraposition is suitable for giving sensing by sensor in sensor; And
Noise isolation, it is arranged near sensor and the detection piece, and described noise isolation is made by magnetic material; The rolling bearing of described belt sensor also comprises:
First holding part, it is made by magnetic material, is fixed on the outer ring, can hold sensor and detection piece the two one of; And
Second holding part, it is made by magnetic material, is fixed on the inner ring, can hold sensor and detection piece in the two another;
Wherein first holding part and second holding part play the effect of noise isolation.
Preferably, sensor is a magnetic sensor, but the magnetic that its sensing is produced by detection piece.
Preferably, at least one has a sidewall in first holding part and second holding part, and this sidewall is opposite at sensor and detection piece on the side of rolling member and radially extends; And first holding part and the second holding part covering sensor and detection piece and have a U-shaped cross-section.
Preferably, the rolling bearing of described belt sensor also comprises a sidewall placed in the middle, and it is disposed radially to such an extent that stretch to rolling member one side of sensor and detection piece; Sidewall wherein placed in the middle plays the effect of noise isolation.
Preferably, first holding part and second holding part can hold sensor and detection piece, and sensor and detection piece are radially opposite each other.
Secondly, the invention provides a kind of rolling bearing of belt sensor, comprising: inner ring; The outer ring; Rolling member, they rollably are arranged between inner ring and the outer ring; Sensor, its be arranged on inner ring and outer ring the two one of on; Detection piece, it is arranged on inner ring and outer ring in the two on another, radially is opposite to sensor and is suitable for giving sensing by sensor; First holding part, it is fixed on the outer ring end surface of outer ring, hold sensor and detection piece the two one of; And second holding part, it is fixed on the inner ring end surface of inner ring, holds in the two another of sensor and detection piece, and at least one in inner ring end surface and the outer ring end surface disposes to such an extent that can't help sensor or detection piece and push vertically.
Preferably, first holding part or second holding part have a flange portion, and this flange portion radially stretches and is contacted with inner ring end surface or outer ring end surface; And in inner ring end surface and the outer ring end surface at least one disposes to such an extent that push vertically via flange portion.
Preferably, have first holding part of flange portion or second holding part and be installed on the inner ring or outer ring as static circle, and flange portion is contacted with the end surface of static circle to hold sensor.
Preferably, be installed in as the inner ring of static circle or first or second holding part on the outer ring and have bending part, this bending part is upwards bending and be arranged on the front end place of the mounting portion on the interior or outside surface that is fitted in static circle radially.
Preferably, the front end of bending part stretches to the side that it is opposite to rolling member from being installed in as the inner ring of turning collar or radially rolling member one side of the sidewall of stretching, extension of first holding part on the outer ring or second holding part.
Preferably, first holding part and second holding part hold sensor and detection piece, and sensor and detection piece are radially opposite each other.
Preferably, hold by first holding part, sensor and detection piece the two one of than hold by second holding part, in the two another of sensor and detection piece be provided with comparatively near inner.
Secondly, the invention provides a kind of rolling bearing of belt sensor, comprising: inner ring; The outer ring; Rolling member rollably is arranged between inner ring and the outer ring; And a plurality of sensors, they be arranged on inner ring and outer ring the two one of on, described a plurality of sensors are arranged on along axial same position place.
Preferably, the rolling bearing of described belt sensor also comprises a detection piece, and this detection piece is opposite to sensor in the axial positions identical with a plurality of sensors and is arranged on in inner ring and the outer ring another, is suitable for giving sensing by sensor.
Preferably, detection piece is an annular material, and it has an outside surface and an inside surface, and outside surface and inside surface the two all give sensing by any one of a plurality of sensors.
Preferably, the outside surface and the inside surface of detection piece have magnetized area, form different magnetizing patterns thereon.
Preferably, a plurality of sensors are arranged on the position of departing from each other on circumference.
Preferably, containment member is arranged between a plurality of sensors and the rolling member.
Preferably, a plurality of sensors comprise magnetic sensor, temperature sensor and vibration transducer.
Secondly, the invention provides a kind of rotary state detecting device, comprising: scrambler, it is installed on the tumbler that rotates with respect to static element and by a plurality of magnetized areas that are arranged in delegation and forms; And sensor, it is installed on the static element and is opposite to scrambler, is suitable for detecting the magnetic force of a plurality of magnetized areas on the scrambler, and a plurality of magnetized areas have different magnetic flux densities.
Preferably, a plurality of magnetized areas on the scrambler are formed by the N and the S utmost point of a plurality of alternate configurations.
Preferably, a plurality of magnetized areas on the scrambler are formed by the N or the S utmost point.
Preferably, scrambler is being opposite to sensor on the direction of tumbler axis.
Preferably, scrambler is being opposite to sensor on tumbler direction radially.
Preferably, a plurality of magnetized areas are provided with following configuration, and promptly magnetic flux density increases gradually or reduces.
Preferably, described rotary state detecting device also is provided with a temperature survey part, is used for the temperature of survey sensor or scrambler or each member of periphery.
Preferably, a seal is set, is used to seal scrambler and sensor.
Secondly, the invention provides a kind of bearing of belt sensor, comprising: inner ring; The outer ring; Scrambler, its be installed in outer ring and inner ring the two one of go up and form by a plurality of magnetized areas that are arranged in delegation; And sensor, it is installed in outer ring and inner ring in the two on another and be opposite to scrambler, is suitable for detecting the magnetic force of a plurality of magnetized areas on the scrambler, and a plurality of magnetized areas have the magnetic flux density that differs from one another.
Preferably, a plurality of magnetized areas on the scrambler are formed by a plurality of N and S utmost points of alternately arranging.
Preferably, a plurality of magnetized areas on the scrambler are formed by the N or the S utmost point.
Preferably, scrambler is located opposite to sensor vertically.
Preferably, scrambler is disposed radially to such an extent that be opposite to sensor.
Preferably, a plurality of magnetized areas are provided with following configuration, and promptly magnetic flux density increases gradually or reduces.
Preferably, a temperature survey part is set, is used for the temperature of survey sensor or scrambler or each member of periphery.
Preferably, a seal is set, is used to seal scrambler and sensor.
Secondly, the invention provides a kind of rotary state detecting device, comprising: sensor, it is installed on the static element; And scrambler, it is installed on the tumbler that rotates with respect to static element, scrambler comprises the sensor counter surface relative with sensor, and sensor is suitable for measuring by the variation of measuring this distance the rotary state of tumbler with change in location for the sensor counter surface of scrambler and the distance between the sensor.
Preferably, described sensor counter surface is made of a plurality of sensor counter surfaces, and the sensor counter surface of scrambler is different and different because of the sensor counter surface with distance between the sensor.
Preferably, scrambler has and is separately positioned on a plurality of magnetized areas that are arranged in delegation on the sensor counter surface.
Preferably, the sensor counter surface of scrambler and the distance between the sensor increase gradually or reduce.
Preferably, scrambler has a plurality of magnetized areas that are arranged in delegation on the sensor counter surface.
Preferably, a plurality of magnetized areas are formed by a plurality of N and S utmost points of alternately arranging.
Preferably, scrambler axially is located opposite to sensor along tumbler.
Preferably, scrambler radially is located opposite to sensor along tumbler.
Preferably, a temperature survey part is set, is used for the temperature of survey sensor or scrambler or each member of periphery.
Preferably, a seal is set, is used to seal scrambler and sensor.
Secondly, the invention provides a kind of rolling bearing of belt sensor, comprising: inner ring; The outer ring; Rolling member, it rollably is arranged between inner ring and the outer ring; Sensor, its be installed in inner ring and outer ring the two one of on; And scrambler, it is installed in outer ring and inner ring in the two on another, scrambler comprises the sensor counter surface relative with sensor, the sensor counter surface of scrambler and the distance between the sensor are with change in location, and sensor is suitable for measuring by the variation of measuring this distance the rotary state of tumbler.
Preferably, described sensor counter surface is made of a plurality of sensor counter surfaces, and different and different because of the sensor counter surface of the distance between the sensor counter surface of sensor and scrambler.
Preferably, scrambler has a plurality of magnetized areas, and it is arranged in delegation and is separately positioned on a plurality of sensor counter surfaces.
Preferably, the sensor counter surface of scrambler and the distance between the sensor increase gradually or reduce.
Preferably, scrambler has a plurality of magnetized areas, and they are arranged in delegation and are arranged on the sensor counter surface.
Preferably, a plurality of magnetized areas are formed by a plurality of N and S utmost points of alternately arranging.
Preferably, scrambler is provided with to such an extent that be opposite to sensor vertically.
Preferably, scrambler is provided with to such an extent that radially be opposite to sensor.
Preferably, a temperature survey part is set, is used for the temperature of determination sensor or scrambler or each member of periphery.
Preferably, a seal is set, is used to seal scrambler and sensor.
Belt sensor rolling bearing of the present invention comprises an inner ring; One outer ring; Each rolling member rollably is arranged between above-mentioned inner ring and the above-mentioned outer ring; One sensor, be arranged on above-mentioned inner ring and above-mentioned outer ring the two one of on; One detection piece is arranged on the two another of above-mentioned inner ring and above-mentioned outer ring, radially is opposite to the sensor and is suitable for giving sensing by the sensor; One first holding part is fixed in the outer ring end surface of above-mentioned outer ring, and hold the sensor and above-mentioned detection piece the two one of; And one second holding part, be fixed in the inner ring end surface of above-mentioned inner ring, and holding the two another of the sensor and above-mentioned detection piece, at least one disposes to such an extent that be not pressed against the sensor or above-mentioned detection piece vertically in wherein above-mentioned inner ring end surface and the above-mentioned outer ring end surface.
Secondly, belt sensor rolling bearing of the present invention comprises an inner ring; One outer ring; Rolling member rollably is arranged between above-mentioned inner ring and the above-mentioned outer ring; And a plurality of sensors, being arranged on above-mentioned inner ring and the outer ring, wherein above-mentioned a plurality of sensors are arranged on along axial same position place.
Moreover belt sensor rolling bearing of the present invention comprises an inner ring; One outer ring; Each rolling member is arranged between above-mentioned inner ring and the above-mentioned outer ring rotationally; One sensor, be arranged on above-mentioned inner ring and outer ring the two one of on; One detection piece is arranged on the two another of above-mentioned inner ring and outer ring, radially is opposite to the sensor, and this detection piece is suitable for giving sensing by the sensor; And a noise isolation, be arranged on the sensor and above-mentioned detection piece nearby.
Secondly, rotary state detecting device of the present invention comprises a scrambler, and it is installed on the tumbler that rotates with respect to static element, and is made of a plurality of magnetized areas that are configured to delegation; And a sensor, it is installed in the magnetic force that is opposite to above-mentioned scrambler on the above-mentioned static element and is suitable for detecting the above-mentioned a plurality of magnetized areas on above-mentioned scrambler, and wherein above-mentioned a plurality of magnetized areas have the magnetic flux density that has nothing in common with each other.
Secondly, the rolling bearing of belt sensor of the present invention comprises: inner ring; The outer ring; Rolling member, it rollably is arranged between above-mentioned outer ring and the above-mentioned inner ring; Scrambler, it is installed in one of above-mentioned inner ring and above-mentioned outer ring and upward and by a plurality of delegation's ground magnetized areas that are arranged in forms; And sensor, it is installed in above-mentioned outer ring and the above-mentioned inner ring another, and is opposed with above-mentioned scrambler, is suitable for surveying the magnetic force of the above-mentioned a plurality of magnetized areas on the above-mentioned scrambler, and wherein above-mentioned a plurality of magnetized areas have different magnetic flux densities.
Secondly, rotary state detecting device of the present invention comprises a sensor, is installed on the static element; An and scrambler, be installed on the tumbler that rotates with respect to static element, and comprise the sensor counter surface relative with sensor, wherein the sensor counter surface of above-mentioned scrambler and the distance between the sensor change with the position, and the sensor is suitable for measuring by the variation of measuring above-mentioned distance the rotary state of tumbler.
Moreover belt sensor rolling bearing of the present invention comprises an inner ring; One outer ring; Each rolling member rollably is arranged between above-mentioned outer ring and the above-mentioned inner ring; One sensor, be installed in above-mentioned inner ring and outer ring the two one of on; An and scrambler, be installed on the two another of above-mentioned outer ring and inner ring, this scrambler comprise one with the opposed sensor counter surface of sensor, wherein the sensor counter surface of above-mentioned scrambler and the distance between the sensor change with the position, and the sensor is suitable for measuring by the variation of measuring distance the rotary state of tumbler.
Description of drawings
Fig. 1 is total simplified schematic diagram of first embodiment;
Fig. 2 is the zoomed-in view of the first embodiment major part;
Fig. 3 is the zoomed-in view of the second embodiment major part;
Fig. 4 is the zoomed-in view of the 3rd embodiment major part;
Fig. 5 is the zoomed-in view of the 4th embodiment major part;
Fig. 6 is the zoomed-in view of the 5th embodiment major part;
Fig. 7 (a) is the zoomed-in view of the 6th embodiment major part; And Fig. 7 (b) is the sketch when watching on the direction that arrow b indicates in by Fig. 7 (a);
Fig. 8 is the zoomed-in view of the 7th embodiment major part;
Fig. 9 is the external perspective view that is used in the multipole magnet among the 7th embodiment;
Figure 10 is the zoomed-in view of the 8th embodiment major part;
Figure 11 is the zoomed-in view of the 9th embodiment major part;
Figure 12 is the zoomed-in view of the tenth embodiment major part;
Figure 13 diagram comprises the rotary state detecting device according to the realization eleventh embodiment of the invention that is installed in wherein as a kind of deep groove ball bearing of tourelle;
Figure 14 is the skeleton view of diagram scrambler 310;
Figure 15 is the partial enlarged view of scrambler 310;
Figure 16 is the output signal figure line that diagram is detected by sensor 320;
Figure 17 is the partial enlarged view that is used in according to realizing scrambler 315 twelveth embodiment of the invention, among a kind of rotary state detecting device;
Figure 18 is the output signal figure line that diagram is detected by sensor 320;
Figure 19 diagram comprises the rotary state detecting device according to the realization thriteenth embodiment of the invention that is mounted in it as a kind of deep groove ball bearing of tourelle;
Figure 20 is the skeleton view of diagram scrambler 330;
Figure 21 is the partial enlarged view of scrambler 330;
Figure 22 is the partial enlarged view of scrambler 335, and this scrambler is used in according among the rotary state detecting device of realizing the 14th embodiment of the present invention;
Figure 23 diagram is as a kind of deep groove ball bearing of belt sensor rolling bearing, comprise be mounted in it, according to the rotary state detecting device of realizing the 15th embodiment of the present invention;
Figure 24 diagram is as a kind of deep groove ball bearing of tourelle, comprise be mounted in it, according to a kind of rotary state detecting device of realizing sixteenth embodiment of the invention;
Figure 25 is the plan view of diagram scrambler 410;
Figure 26 is the local enlarged perspective of scrambler 410;
Figure 27 is the figure line that illustrates the output signal that is detected by sensor 420;
Figure 28 is the local enlarged perspective of scrambler 415, and this scrambler is used in according among the rotary state detecting device of realizing seventeenth embodiment of the invention;
Figure 29 is the local enlarged perspective of scrambler 416, and this scrambler is used in according among a kind of rotary state detecting device of realizing eighteenth embodiment of the invention;
Figure 30 is the figure line that illustrates the output signal that is detected by sensor 425;
Figure 31 diagram is as a kind of deep groove ball bearing of tourelle, comprise be mounted in it, according to a kind of rotary state detecting device of realizing nineteenth embodiment of the invention;
Figure 32 is the plan view of diagram scrambler 430;
Figure 33 is the local enlarged perspective of scrambler 430;
Figure 34 is the local enlarged perspective of scrambler 435, and this scrambler is used in according among a kind of rotary state detecting device of realizing the 20th embodiment of the present invention;
Figure 35 is the local enlarged perspective of scrambler 436, and this scrambler is used in according among a kind of rotary state detecting device of realizing the 21st embodiment of the present invention;
Figure 36 is the plan view that diagram realizes a kind of scrambler 450 of the 22nd embodiment of the present invention;
Figure 37 is the local enlarged perspective of scrambler 450;
Figure 38 is the sketch that illustrates the output signal that is detected by scrambler 440;
Figure 39 is the local enlarged perspective that diagram realizes a kind of scrambler 455 of the 23rd embodiment of the present invention;
Figure 40 is the synoptic diagram that diagram realizes a kind of scrambler 460 of the 24th embodiment of the present invention;
Figure 41 is the plan view that diagram realizes a kind of scrambler 460 of the 24th embodiment of the present invention;
Figure 42 is the local enlarged perspective of scrambler 460;
Figure 43 is the local enlarged perspective of a kind of scrambler 465 among the diagram realization 25th embodiment of the present invention;
Figure 44 is a kind of deep groove ball bearing as tourelle, comprises according to a kind of rotary state detecting device of realizing the 26th embodiment of the present invention;
Figure 45 is the simplified schematic diagram of a kind of tourelle of belt sensor in the diagram correlation technique.
Embodiment
Realize that after this various embodiments of the present invention will at length be illustrated in conjunction with each figure.
(first embodiment)
Fig. 1 illustrates a kind of belt sensor rolling bearing 10 of realizing the first embodiment of the present invention.The rolling bearing 10 of belt sensor comprises a plurality of balls (rolling member) 13, is interposed between outer ring 11 and the inner ring 12.A plurality of balls 13 are circumferentially rollably held by retainer 13a edge with separating each other.
At this, outer ring 11 is static circles and inner ring 12 is turning collars.
(being the left side on the figure) is provided with screen board 14 as seal on the axial side of rolling bearing 10.Screen board 14 locates to be fixed in outer ring 11 at its bottom (outer periphery).The front end of screen board 14 (interior periphery) does not form with inner ring 12 and contacts, and is a kind of contactless sealing spare.
Can adopt as the contact seal shown among Figure 45.
On the axial opposite side of rolling bearing 10 (being right-hand member on the figure), first holding part 15 is fixed in outer ring 11 and second holding part 18 is fixed in inner ring 12.First holding part 15 and second holding part 18 can be made and can be made by sheet metal processing etc. by metal.
First holding part 15 has cylindrical shape mounting portion 15a, and it is fitted on the inside surface of outer ring 11; Flange portion 15b, it is connected in mounting portion 15a, and is radially protruding; Extension 15c is connected in flange portion 15b in radial position place identical with the mounting portion 15a that stretches vertically; And sensor holds part 15d, is connected in the axial end portion of extension 15c and radially inwardly stretches.Secondly, (being the left side on the figure) is provided with the sweep 15e that radially inwardly rises on the mounting portion one side 15a that is opposite to flange portion 15b.
Second holding part 18 has coupling part 18a, radially stretch and at its place, bottom (interior periphery) caulked in the groove that is formed on inner ring 12 outer surfaces; And detection piece holds part 18b, is connected in the front end (outer periphery) of the coupling part 18a that radially stretches.
Hold at the detection piece of second holding part 18 on the interior periphery of part 18b and hold the multipole magnet 19 of an annular as detection piece.
The front end that the sensor of first holding part 15 holds part 15d is inwardly outstanding from multipole magnet 19, is mounted thereon and hold ring 17 as the sensor of one separately.Hold on ring 17 the outer periphery at sensor and to hold magnetic sensor 16 as sensor.Magnetic sensor 16 is arranged on the interior periphery of multipole magnet 19 with leaving a little each other, and two magnetic sensors are radially opposite each other.First holding part 15 does not form with magnetic sensor 16 with second holding part 18 and contacts, and second holder 18 does not contact with first holding part 15 and magnetic sensor 16.
As multipole magnet 19, a kind of of use is to have 19a of first and second portion 19b, the contiguous vertically 19a of first of the magnetizing pattern that each tool of first and second portion is different, second portion 19b.That the 19a of first has is a plurality of (such as the altogether 64) S and the N utmost point is along circumferential alternate configurations.Second portion 19b has S and N the two poles of the earth, only disposes along circumferential a position.
Magnetic sensor 16 also has 16a of first and second portion 16b, and they are disposed radially to such an extent that be opposite to the 19a of first and the second portion 19b of multipole magnet 19 respectively.The velocity of rotation of inner ring 12 can be observed at the first 16a place of magnetic sensor 16, and the rotation phase of inner ring 12 can be observed at second portion 16b place.
Fig. 2 is the zoomed-in view of Fig. 1 major part.Shown among Fig. 2, the flange portion 15b of first holding part 15 bends to U-shaped very close to each other and radially stretches, and one of its both side surface contacts with outer ring 11 formation.Even when as put on opposite side when surface of flange portion 15b among the figure by the arbitrary pressure load shown in the arrow P, also pressure load P1 is delivered to outer ring 11 to flange portion 15b without undergoing distortion, and this is because flange 15b is supported on the end surface of outer ring.Because the extension 15c of first holding part 15 stretches vertically in radial position place identical with mounting portion 15a as described above, can not be subjected to the obstruction of extension 15c to the outer ring end surface load of exerting pressure via flange portion 15b.
Secondly, in the present embodiment, each magnetic sensor 16 of the total area ratio of inner ring 12 end surfaces and sensor hold ring 17 and all are positioned at the inboard more basically.In other words, basically the total area of inner ring 12 end surfaces be expose and applying not of pressure load can or not do not held ring 17 by sensor by magnetic sensor 16 yet and hinder, as by shown in the arrow P among the figure 2.
Moreover shown among Fig. 2, the sweep 15e front end that is arranged on first holding part, the 15 mounting portion 15a stretches to coupling part 18a one side, and this coupling part 18a is the sidewall that radially stretches of second holding part 18, with ball opposing (overhang is A).Due to the centrifugal force that produces owing to rotation, be present on inner ring 12 1 sides such as the such lubricant of lubricating ester along coupling part 18a near an effluent of ball 13 to outer ring 11 along with the inner ring 12 and second holding part 18.Lubricant bump sweep 15e, it is directed to ball 13 subsequently thus.In other words, lubricant is stoped by sweep 15e, and thereby does not spill bearing space.
According to the belt sensor rolling bearing 10 of configuration mentioned before having, the end surface of inner ring 12 can be vertically directly the end surface of pressurized and outer ring 11 can be only via the flange portion 15b of first holding part 15 pressurized vertically.Secondly, multipole magnet 19 and magnetic sensor 16 radially hold with putting toward each other.Therefore, multipole magnet 19 and magnetic sensor 16 can not depart from during assembling, setting pilot pressure or other situations vertically, descend to prevent accuracy of detection.Because ball bearing has end play greater than radial play, sensor can be easy to increase in the configuration of the correlation technique shown among Figure 45 from the offset of detection piece, but present embodiment does not have this worry.
Secondly, according to present embodiment, the axial location of first holding part 15 can be made by flange portion 15b, makes first holding part 15 accurately and easily to be installed on the bearing.Moreover, because its first holding part 15 that is provided with flange portion 15b is installed on the outer ring 11 as static circle, flange portion 15b forms with the end surface of outer ring 11 and contacts simultaneously, and magnetic sensor 16 is held on first holding part 15, so magnetic sensor 16 can very accurately be operated.
Secondly, the leakage of lubricant can be prevented significantly by the sweep 15e that is arranged on first holding part 15.Moreover first holding part 15, magnetic sensor 16 and sensor hold ring 17, and second holding part 18 and multipole magnet 19 formation maze portion, by means of it, can prevent significantly such as entering bearing space at the such foreign matter of dust.
As sensor, available such as temperature sensor or vibration transducer at this.
(second embodiment)
Fig. 3 illustrates a kind of zoomed-in view of major part of belt sensor rolling bearing 20, and this bearing is according to realizing the second embodiment of the present invention.In each embodiment of following explanation, for having the explanation of each member of same structure and effect with each member that has illustrated, will be by being furnished with identical for them in the drawings or like reference numerals or symbol are simplified or omitted.
Among second embodiment among being shown in Fig. 3, the front end of first holding part, 15 sweep 15e further is furnished with sealing labial lamina 21 among first embodiment.Shown among Fig. 3, be arranged on forming with second holding part 18 on the sweep 15e front end and contact by the sealing labial lamina of making such as the such elastic component of rubber 21.Gap between sealing labial lamina 21 salable first holding parts 15 and second holding part 18.
As sensor, available such as temperature sensor or vibration transducer at this.
(the 3rd embodiment)
Fig. 4 illustrates a kind of zoomed-in view of major part of belt sensor rolling bearing 30, and this bearing is according to realizing the third embodiment of the present invention.In the present embodiment, same, outer ring 11 is static circles and inner ring 12 is turning collars.
Among the 3rd embodiment among being shown in Fig. 4, hold magnetic sensor 16 as sensor being fixed on first holding part 35 of outer ring 11, and on second holding part 38 that is fixed on the inner ring 12, hold multipole magnet 19 as detection piece.
First holding part 35 has: mounting portion 35a, and it is fitted on the inside surface of outer ring 11; Flange portion 35b is connected in mounting portion 35a, contacts with the cycle surface surface, and radially stretches; Sensor holds part 35c, is connected in flange portion 35b, and stretches vertically in radial position place identical with mounting portion 35a; And sweep 35e, be arranged on mounting portion 35a one side that is opposite to flange portion 35b.Sensor holds ring 17 and is installed on the interior periphery that sensor holds part 35c, and magnetic sensor 16 is held on the interior periphery that sensor holds ring 17.
Second holding part 38 has: coupling part 38a, and it radially stretches and locates in the groove of caulked on being formed in inner ring 12 outer surfaces at its bottom (interior periphery); And detection piece holds part 38b, stretches vertically in radial position place more inboard more than coupling part 38a front end (outer periphery).Coupling part 38a curves U-shaped very close to each other and radially stretches and play the effect of seal equally.Hold at detection piece on the outer periphery of part 38b and hold multipole magnet 19.
As sensor, available such as temperature sensor or vibration transducer at this.
(the 4th embodiment)
Fig. 5 illustrates a kind of zoomed-in view of major part of belt sensor rolling bearing, and this bearing is according to realizing the fourth embodiment of the present invention.In the present embodiment, same, outer ring 41 is static circle and inner ring 12 turning collars.
Among the 4th embodiment among being shown in Fig. 5, outer ring 41 has extension, the outer ring 41a that extends vertically.The end surface of extension, outer ring 41a is located to such an extent that compare the end surface of the multipole magnet 19 that is held by second holding part 18 (as scheming to go up being seen right side) further from ball.First holding part 45 radially stretches and locates (outer periphery) caulked in being formed on extension, outer ring 41 inner lip-deep grooves in its bottom.(interior periphery) is equipped with sensor and holds ring 17 on the front end of first holding part 45, holds on ring 17 outer peripheries at sensor and holds magnetic sensor 16.
In the present embodiment, because outer ring 41 has extension, outer ring 41a, the end surface of extension 41a is being installed on the shell or direct pressurized during some other situation.
As sensor, available such as temperature sensor or vibration transducer at this.
(the 5th embodiment)
Fig. 6 illustrates a kind of belt sensor rolling bearing 110 of realizing the fifth embodiment of the present invention.Belt sensor rolling bearing 110 has a plurality of balls (rolling member) 113, is interposed between outer ring 111 and the inner ring 112, and a plurality of balls 113 are rollably circumferentially held by retainer 113a edge with separating each other.
At this, outer ring 111 is static circles and inner ring 112 is turning collars.
The axial side of ball (as the left side of seeing on the figure) that is separately positioned on a pair of screen board 114,115 goes up and opposite side (as the right side of seeing on the figure) is gone up as packoff.Outer ring 111 is located to be fixed in screen board 114,115 each comfortable its bottom (outer periphery).It is the noncontact seal separately that screen board 114,115 is located not contact with inner ring 112 also at its front end (interior periphery).
Screen board 114,115 can prevent to seal the leakage of the lubricant in the gap between ball 113 and outer ring 111 and inner ring 112.Therefore, the lubricant quantity that seals needn't be more than required.Secondly, screen board 114,115 can prevent to enter bearing inside such as the such foreign matter of dust.Moreover, be arranged on it seems on the figure for the screen board on the right side 115 can prevent to cause after the sensor 117,118 of explanation and the phenomenon that the lubricating oil of 119 faulty operations leaks from ball 113 1 sides.
Outer ring 111 has main body 111a, and it is with rotating manner rotating bearing ball 113 and have the screen board 114,115 that is fixed thereon in its bottom and be provided with to such an extent that be adjacent to the extension 111b of main body 111a vertically.At this, the outer surface of the outer surface of extension 111b and main body 111a flushes each other, and extension 111b has step part 111c, and this step part is formed on the interior surface thereof as sagging part.
The center of rolling member 113 is arranged on the C1 place, axial centre position of main body 111a, and the axial centre position C1 of main body 111a from the whole outer ring 111 that comprises extension 111b vertically center C2 depart from.
Holding part 116 is fixed in the step part 111c of extension 111b at its place, bottom.
Holding part 116 is to be made by the thin plate with U-shaped cross section.Holding part 116 has the first plate part 116a, is fixed in step part 111c, and the second plate part 111b, is provided with to such an extent that radially leave the first plate part 116a, and first and second parts are connected to each other via coupling part 116c.Fixedly vibration transducer 117 and temperature sensor 118 between first and second plate part 116a and 116b, they leave outer ring 111 in proper order with this and be positioned (as see on the figure upwards).Secondly, magnetic sensor 119 is fixed in the second plate part 116b on inner ring 112 1 sides, inserts and puts therebetween with molded resin part 120 simultaneously.
Vibration transducer 117, temperature sensor 118 and magnetic sensor 119 are being electrically connected on external control circuit independently of one another via the outer lead 121 that is arranged on the 116c of coupling part.
Vibration transducer 117 is arranged on the position near outer ring 111.Vibration transducer 117 is used to by the oscillating component that gives outer ring 111 being converted to electric signal and subsequently it being passed to the improper vibration etc. that control circuit detects bearing and each auxiliary equipment thereof.
Temperature sensor 118 is in order to prevent owing to lacking lubricating oil or stuck phenomenon that similar reason caused by always detecting ball 113, outer ring 111 and inner ring 112 ambient temperature data nearby and providing it to control circuit subsequently.
Magnetic sensor 119 is provided with relatively with the multipole magnet 122 of later explanation and disengages with it, and in order to by generating pulse electrical signal from the magnetic force that generates by multipole magnet 122 and this electrical signal transfer to control circuit being detected velocity of rotation, rotation direction and the rotation phase of inner ring 112.
Vibration transducer 117, temperature sensor 118 and magnetic sensor 119 are disposed radially along the outer ring 111 and the axial same position place of inner ring 112.
Inner ring 112 has main body 112a, and rotatably support ball 113, and extension 112b are provided with to such an extent that be adjacent to main body 112a vertically.Axial positions identical with vibration transducer 117, temperature sensor 118 and magnetic sensor 119 on the outside surface of extension 112b is made step part 112c, and on step part 112c fixing multipole magnet 122 as detection piece.
Multipole magnet 122 forms annular.Multipole magnet 122 has a plurality of magnetized S and the N utmost point, and they are along circumferentially alternately disposing on its outer surface.Multipole magnet 122 always externally generates magnetic force, and when it rotates with inner ring 112, and the magnetic force that is generated by multipole magnet 122 is given magnetic sensor 119 according to the velocity of rotation of inner ring 112, so that the velocity of rotation of inner ring 112 is detected.
Multipole magnet 122 also is arranged on the axial positions identical with vibration transducer 117, temperature sensor 118 and magnetic sensor 119.
In the present embodiment, because the multipole magnet 122 that is fixed in vibration transducer 117, temperature sensor 118 and the magnetic sensor 119 of outer ring 111 and is fixed in inner ring 112 all is arranged on the same axial position place in the space between outer ring 111 and the inner ring 112, the detection of the detection of resonating etc., the detection of ambient temperature data and inner ring 112 velocities of rotation can be made and need not increase the width of bearing 110.
Secondly, as packoff, in this available contact seal, labyrinth seal or similar sealing.Moreover, as rolling member, at this available roller or conical roller.Secondly, a plurality of sensors can be installed on inner ring or the outer ring with holding part, make it stretch out from the space between inner ring and the outer ring.
(the 6th embodiment)
Fig. 7 (a) and 7 (b) illustrate a kind of belt sensor rolling bearing 130 of realizing the sixth embodiment of the present invention separately.In each embodiment of following explanation, for having the explanation of each member of same structure and effect with each member that has illustrated, will be by being furnished with identical for them in the drawings or like reference numerals or symbol are simplified or omitted.
Fig. 7 (b) is the sketch of seeing on the direction that arrow b indicates in by Fig. 7 (a).In the present embodiment, vibration transducer 117, temperature sensor 118 and magnetic sensor 119 are arranged on along the outer ring that 111 axis are identical and position that 111 peripheries depart from each other along the outer ring.
Even present embodiment also is effectively when the space between inner ring and the outer ring is very little, and the diameter of bearing can be reduced.
As holding part 116, this available have not be a kind of of U-shaped cross section or have a kind of of U-shaped cross section, a kind of first plate part 116a in back is little of consequently any sensor not being set with the gap between the second plate part 116b.
Secondly, as packoff, in this available contact seal, labyrinth sealing or similar sealing.Moreover, as rolling member, at this available roller or conical roller.Secondly, a plurality of sensors can be installed on inner ring or the outer ring with holding part, cause it to stretch out from the space between inner ring and the outer ring.
(the 7th embodiment)
Fig. 8 illustrates a kind of belt sensor rolling bearing 140 of realizing the seventh embodiment of the present invention.In the present embodiment, same, outer ring 111 is static circles and inner ring 112 is turning collars.
In the present embodiment, holding part 146 is fixed in the step part 111c among the 111 extension 111b of outer ring.Holding part 146 has the first plate part 146a that is fixed on the step part 111c; Be disposed radially to such an extent that leave the second plate part 146b of the first plate part 146a; And the 3rd plate part 14d, be arranged on via between the coupling part 146c first plate part 146a connected to one another and the second plate part 146b.
First magnetic sensor 149 is fixed in the 3rd plate part 146d on the second plate part 146b, one side.Secondly, second magnetic sensor 150 is fixed in the second plate part 146b on the 3rd plate part 146d one side.
First magnetic sensor 149 and second magnetic sensor 150 are disposed radially to such an extent that separate each other.As detection piece multipole magnet 142 is set between first magnetic sensor 149 and second magnetic sensor 150, this multipole magnet 142 radially is opposite to or deviates to be contacted with first magnetic sensor 149 and second magnetic sensor 150.Multipole magnet 142 is fixed in inner ring 112 by magnet holding part 147.Magnetic card gripping member 147 is fixed in the step part 112c among the inner ring 112 extension 112b at its place, bottom.The front end of magnet holding part 147 is engaged in the outside surface of multipole magnet 142.
Shown among Fig. 9, multipole magnet 142 forms annular.On the outside surface of multipole magnet 142, form the first magnetized spot 142a, it has the S and the N utmost point of the circumferential alternate configurations in a plurality of edges, form the second magnetized spot 142b on the inside surface of multipole magnet 142, this second magnetized spot 142b has the single N utmost point that is arranged on the precalculated position.
The magnetic force that multipole magnet 142 first magnetized spot 142a externally generate is given first magnetic sensor 149 and magnetic force that multipole magnet 142 second magnetized spot 142b externally generate is given second magnetic sensor 150.First magnetic sensor 149 in order to the velocity of rotation that detects inner ring 112 second magnetic sensor 150 in order to detect the phase place of inner ring 112.As first and second magnetic sensors 149 and 150, at this available Hall (hall) device or similar device.
In the present embodiment, equally, because the multipole magnet 142 that is fixed in first magnetic sensor 149 and second magnetic sensor 150 of outer ring 111 and is fixed in inner ring 112 is arranged on same axial positions, the detection of inner ring 112 velocities of rotation and phase place can be made and not increase the width of bearing.
Secondly, as packoff, in this available contact seal, labyrinth sealing or similar sealing.Moreover, as rolling member, at this available roller or conical roller.Secondly, a plurality of sensors can be installed on inner ring or the outer ring with holding part, cause its space between inner ring and outer ring to stretch out.
(the 8th embodiment)
Figure 10 illustrates a kind of belt sensor rolling bearing 210 of realizing the eighth embodiment of the present invention.The rolling bearing 210 of belt sensor comprises a plurality of balls (rolling member) 213, and they are interposed between outer ring 211 and the inner ring 212.A plurality of balls 213 by retainer 214 be spaced from each other along circumferentially being held rotationally.At this, outer ring 211 is static circles and inner ring 212 is turning collars.
On an axial side (being the left side on the figure) of rolling bearing 210, seal 215 is set.Seal 215 locates to be fixed in outer ring 211 at its bottom (outer periphery).The front end of seal 215 (interior periphery) does not form with inner ring 212 and does not contact and seal 215 is noncontact seals.Though do not draw, can adopt the contact seal.
Axial opposite side (being the right side on figure) at rolling bearing 210 is provided with sidewall 216 placed in the middle, and 211 inside surfaces radially stretch to inner ring 212 to this sidewall 216 from the outer ring.Sidewall 216 placed in the middle forms annular and among its outer periphery place is fitted in sealing groove on the outer ring 211.Secondly, first holding part 217 is fixed in outer ring 212 and second holding part 218 is fixed in inner ring 212.
A kind of material of magnetic flux that can stop of sidewall 216 placed in the middle, first holding part 217 and second holding part, 218 each freedom such as magnetic materials is made.As a kind of like this material, at this available SPCC material or martensite or ferrite stainless steel material.
First holding part 217 has cylindrical shape mounting portion 217a, is fitted on 211 inside surfaces of outer ring; Flange portion 217b is connected in mounting portion 217a, and 211 end surfaces radially outwards stretch along the outer ring; Extension 217c is connected in flange portion 217b, stretches vertically in radial position place identical with mounting portion 217a; And sidewall 217d, be connected in the axial end portion of extension 217c and radially inwardly stretch.Mounting portion 217a locates to contact with sidewall 216 sides placed in the middle formation In the view of being opposite to its front end of flange portion 217b (be left side) on figure.Seal between the shoulder of groove on the front end that sidewall 216 placed in the middle is clamped at mounting portion 217a and the outer ring 211.
On the inside surface of the mounting portion 217a of first holding part 217 and extension 217c, hold magnetic sensor as sensor.Magnetic sensor 219 is fixed in first holding part 217 and resin block 220 is sandwiched between between the two.Magnetic sensor 219 is enclosed on three, except its side radially, that is,, and on being opposite to the axial side of ball 213, it surrounds near surrounding, on its outside radially, surround by sidewall 216 placed in the middle on axial side of ball 213 at it by sidewall 217d by mounting portion 217a and extension 217c.Magnetic sensor 219 can produce electric signal based on the magnetic flux that the multipole magnet 221 by explanation subsequently produces.Electric signal passes to the control circuit of not drawing among the figure via outer lead 22.Control circuit is in order to the waveform of amplification and adjustment electric signal, so that it is converted into so as to detecting the pulse turn signal of inner ring velocity of rotation.
Second holding part 218 has cylindrical shape mounting portion 218a, and it is fitted on the outside surface of inner ring 212; Flange portion 218b is connected in mounting portion 218a, and radially inwardly stretches along the end surface of inner ring 212; And extension 218c, be connected in flange portion 218b and stretching vertically with the same radial position place of mounting portion 218a.
On the outside surface of the mounting portion 218a of second holding part 218 and extension 218c, hold the multipole magnet 221 of annular as detection piece.
Multipole magnet 221 has a plurality of S and the N utmost point, along circumferentially alternately disposing on its outer surface.Multipole magnet 221 is located opposite to and deviates to be contacted with the radially inner side of magnetic sensor 219, is centered between the two with predetermined gap.Multipole magnet 221 is enclosed on its both sides, except its outside radially and its close axial side of ball 213, that is, surround and on its inboard radially, surround at its sidewall 217d that is opposite on the axial side of ball 213 by first holding part 217 by mounting portion 218a and extension 218c.The internal diameter of sidewall 216 placed in the middle can be reduced (sidewall 216 placed in the middle can be extended towards inner ring 212) to be blocked the multipole magnet 221 axial sides near ball 213 by sidewall 216 placed in the middle.Multipole magnet 221 always externally produces magnetic flux.The front end of first holding part, 217 sidewall 217d is provided with near the multipole magnet 221 and second holding part 218, but does not form contact with it.
In this configuration, sidewall 216 placed in the middle, first holding part 217 and second holding part 218 constitute a rectangle and cover magnetic sensor 219 and multipole magnet 221 on the cross section.
The flange portion 217b of first holding part 217 is bent to U-shaped very close to each other and radially stretches, and one of its both sides contact with the end surface formation of outer ring 211.Even when a certain pressure load puts on flange portion 217b with in belt sensor ball bearing 216 propelling figure during unillustrated shell on its opposite side, flange portion 217b is also without undergoing distortion, and this is that in fact pressure load is delivered to outer ring 211 because it is supported by the end surface of outer ring.The flange portion 218b of second holding part 218, same, have same effect.
Belt sensor rolling bearing 210 according to configuration mentioned before having, magnetic sensor 219 and multipole magnet 221 are surrounded by sidewall 216 placed in the middle, first holding part 217 and second holding part 218, they play the effect of noise isolation, make may to stop from such as the magnetic flux that spills the such device of motor and high frequency electric source.Therefore, the impedance to the magnetic flux that spills can strengthen to obtain very high magnetic sensor 219 accuracy of detection.In addition, reliably catch by magnetic sensor 219, thereby in surveying, obtain high precision by magnetic sensor 219 by the magnetic that multipole magnet 221 produces.
Secondly, because sidewall 216 placed in the middle is arranged on magnetic sensor 219 and the multipole magnet 221 close sides of ball 213, so, act on from ball 213 to magnetic sensor 219 and multipole magnet 221 directions on the magnetic flux that spills can be blocked equally and the bearing space lubricant can be prevented from the influence of magnetic sensor 219.
Moreover, be provided with radially opposite each otherly by hold magnetic sensor 219 and multipole magnet 221 so that magnetic sensor 219 and multipole magnet 221 with first holding part 217 and second holding part 218, the axial width of entire belt sensor rolling bearing 210 is reduced.
In the present embodiment, as sensor, at this usable temp sensor or vibration transducer.Secondly, as multipole magnet, at this available first and second portion with the different magnetizing patterns of each tool, second portion is adjacent to the sort of of first vertically.First can have a plurality of S and the N utmost point, and along circumferential alternate configurations, and second portion has the S and the N utmost point, and their are along circumferentially only being configured in a position.In this case, magnetic sensor also can be arranged to have first and second portion.
Secondly, magnetic sensor 219 can be furnished with a transmitter and control circuit can be furnished with receiver, so that wireless telecommunications is become may and be signal to transmit to save outer lead 222.
(the 9th embodiment)
Figure 11 is the sketch of diagram according to a kind of belt sensor rolling bearing 230 of realizing the ninth embodiment of the present invention.In the rolling bearing 230 of the belt sensor of present embodiment, the sidewall 231e placed in the middle and first holding part 231 are made one.Some other structure all is similar to the belt sensor rolling bearing of the 8th embodiment.Even the structure of present embodiment also can play the effect same as first embodiment.
(the tenth embodiment)
Figure 12 is the sketch of diagram according to a kind of belt sensor rolling bearing of realizing the tenth embodiment of the present invention.In the belt sensor rolling bearing 240 of present embodiment, the sidewall 214e placed in the middle and first holding part 241 are made one.Some other similar is in the belt sensor rolling bearing of the 8th embodiment.Even the structure of present embodiment also can play the effect same as first embodiment.(the 11 embodiment)
Realize that the 11st embodiment of the present invention will at length illustrated below in conjunction with Figure 13 to 16.Figure 13 illustrates a kind of deep groove ball bearing, as the tourelle that wherein is equipped with according to the rotation detecting device of realizing the 11st embodiment of the present invention.Deep groove ball bearing has outer ring 303, inner ring 304, a plurality of ball 307 as rolling member, sealing ring 308 and retainer 309.
The inside surface 301a of shell 301 is fixed in as static element in outer ring 303.Outer ring 303 is to make through forging to wait by making such as the such metal material of carbon steel.It has the outer ring raceway 305 that is used to guide ball 307 on the surface that sets within it outer ring 303.
Inner ring 304 is similar to outer ring 303 and makes such as the such metal material of carbon steel and make through forging to wait.Inner ring 304 is fitted on the outside surface 302a of rotating shaft 302, and rotating shaft is a tumbler.Inner ring 304 has inner ring raceway 306, and it is provided with on its outer surface and is used to guide ball 307 corresponding to the outer ring raceway 305 of outer ring 303.Inner ring 304 is along with the rotation and the rotating shaft 302 of rotating shaft 302 are rotated with being integral.
Ball 307 is arranged in a line between the inner ring raceway 306 of the outer ring raceway 305 of outer ring 303 and inner ring 304.Each ball 307 is followed the rotation of rotating shaft 302 and is rotated along with inner ring 304, rolls across outer ring 305 and inner ring 304.
Sealing ring 308 can stop and sealed outer ring 303 and inner ring 304 between put two openings in the space of each ball 307.Sealing ring 308 can prevent that dust, moisture, foreign matter etc. from entering the ball reception space and preventing that lubricating oil from spilling the ball reception space.Sealing ring 308 is fixed on the fixed part 303b place that is formed on 303 inside surfaces of outer ring.
Retainer 309 rollably holds each ball 307 between outer ring raceway 305 and inner ring raceway 306.As retainer 309, at this available pressing cage, machine work retainer.
The scrambler holding part 311 of annular uprightly is set on the outside surface 302a of rotating shaft 302.Scrambler holding part 311 stretches to shell 301 from rotating shaft 302 outside surface 302a, that is radially outside from rotating shaft 302.The scrambler 310 that configuration is faced vertically on an axial side of scrambler holding part 311.
On the other hand, on the inside surface 301a of shell 301, sensor card gripping member 321 is set uprightly.Sensor card gripping member 321 is stretched to rotating shaft 302 from the inside surface 301a of shell 301, that is radially inside from shell 301.Axial side in sensor card gripping member 321 is provided with single sensor 320, and sensor 320 is opposite to scrambler 310 vertically and is provided with.
Figure 14 is the skeleton view of diagram scrambler 310, and Figure 15 is the partial enlarged view of Figure 14.Scrambler 310 is annular, has diametrically than big in the axial direction width.Scrambler 310 is made to such an extent that have a plurality of N utmost points 312 and a S utmost point 313, with equidistantly along the hoop alternate configurations.A plurality of N utmost points are the magnetized areas of the different magnetic flux densities of each tool with the S utmost point.
Each magnetized area that constitutes scrambler 310 has one separately with reference to magnetized area, has certain minimum magnetic flux density.Secondly, each magnetized area is given such magnetic flux density separately, that is, under with the situation of reference magnetized area as reference, it seems from sensor 320 to increase to next magnetized area from magnetized area clockwise.In detail, in the present embodiment, the magnetic flux density that a plurality of magnetized areas are given separately
A (k)=kAref (equation 1)
A (k): from the magnetic flux density of reference magnetized area k clockwise magnetized area
Aref: with reference to the magnetic flux density of magnetized area
In other words, the magnetic flux density from reference magnetized area k clockwise magnetized area is with reference to magnetized area k doubly.What have a minimum magnetic flux density is provided with to such an extent that then have a magnetized area of peakflux density with reference to magnetized area.
As the material of scrambler, this available alnico magnet, ferrite magnet, samarium-cobalt magnet, neodymium-iron-boron magnets or by various ferromagnetic powders are mixed with plastics, molded mixture and solidify the bonded magnet that moulding material obtains.Because the magnetic flux density of a plurality of magnetized areas need be different, so preferentially adopt bonded magnet, it can easily design to such an extent that have any magnetic flux density.At this, the bonded magnet that adopts a kind of plastics that contain ferrite dust to make.The magnetic force of magnet becomes with temperature.Therefore, must be that the magnetization is determined to make the peak value of under various operational temperature conditions a certain magnetized area the peak value with another magnetized area is not identical.
So the N utmost point 312 of configuration and the S utmost point 313 form a magnetic field around self separately, and this magnetic field has the intensity corresponding to its polarity and magnetic flux density.Therefore, the magnetic field corresponding to the intensity of the magnetic flux density of the N utmost point 312 and the S utmost point 313 forms around scrambler 310.Scrambler 310 is stored among the control circuit as the reference point of rotating shaft absolute angle with reference to the position (angle is set) of magnetized area, and the latter does not draw.
Sensor 320 is magnetic sensors, and it can detect the magnetic field that is formed by scrambler 310.Sensor 320 is provided with near the surface of scrambler 310 and the magnetic field that can sensing be formed by a plurality of magnetized areas.As sensor 320, availablely can detect a kind of such as the such magnetic field of Hall element and coil at this.At this, will make an explanation by the situation of example adopting by reference Hall element.Hall element is the element that generates electric current according to magnetic flux intensity of crossing Hall element and direction.
Scrambler 310 rotates along with the rotation of rotating shaft 302.Sensor 320 is exported to control circuit meeting the N utmost point 312 that is opposite to sensor 320 and the current value of the S utmost point 313 formed magnetic flux intensity and direction via cable 322.
Figure 16 is the figure line of diagram by the output signal of sensor 320 detections.In Figure 16, ordinate is represented the intensity of output signal and the horizontal ordinate express time.The size of output signal is proportional to the intensity of magnetic flux and the symbol of output signal is determined by the direction of magnetic flux.At this, the pulse that appears among Figure 16 the left side is the pulse that is produced by the formed magnetic flux of reference magnetized area.Figure 16 shows that the intensity absolute value of peak value of pulse increases in time.Therefore, under the situation of Figure 16, control circuit is judged rotating shaft and is increased in the N utmost point 312 or the S utmost point 313 intensity, that is it seems that from sensor 320 anticlockwise direction rotates.Then, the control circuit number goes out peak value number that the unit interval detects and the spacing of the setting that the peak value number that goes out according to number and each magnetized area are complied with is calculated velocity of rotation.
Secondly, control circuit can be determined the absolute angle of rotating shaft according to peak strength.Under the situation that the peak value (some A or C among Figure 16) of sensor is detected, the magnetized area that control circuit is judged corresponding to the output that so detects is located opposite to sensor 320.Then, control circuit is judged, and rotating shaft is arranged on the absolute angle place corresponding to the magnetized area that so detects.In addition, be under the situation of the numerical value at some B place between two peak values in the output of sensor, the absolute angle of putting B is that intensity according to the some A place of last peak value is for coming out in the ratio calculation of an A place and the difference between a B place intensity.In detail a bit say, come out according to following Equation for Calculating in an angle at B place.
θ (B)=θ (A)+180b/an (equation 2)
θ (A): the absolute angle at some A place
θ (B): the absolute angle at some B place
A: the output intensity at some A place
B: the difference between some A place and the some B place output intensity
N: the sum that is arranged on the magnetized area on the scrambler
As mentioned above, according to the present invention, scrambler 310 and sensor 320 are provided with opposite each otherly vertically.Secondly, scrambler 310 by a plurality of dispose so that magnetic flux intensity the N utmost point 312 and the S utmost point 313 that increase gradually constitute.Therefore, single-sensor 320 can be in order to detect velocity of rotation, direction and the angle of rotation 302 simultaneously.
Therefore, the velocity of rotation of rotating shaft, direction and angle can be detected by simple device, make to reduce number of components and parts and thereby parts cost.Secondly, the minimizing of amount of parts can improve assembling, make and also may reduce assembly cost.
Secondly, owing to only need a sensor,, make and to make compact design on the whole so can save the space in the bearing.Moreover the minimizing of number of sensors also causes reducing of bearing weight, if bearing is used for the reduction that automobile etc. can help oil consumption.
Though the present invention illustrated with reference to the situation that the magnetic flux density of each magnetized area reduces gradually, can on a line, prepare and dispose a plurality of magnetized area groups, its magnetic flux density reduces gradually.In the case, by number go out to be included among each magnetized area group with reference to the detected number of times of magnetized area magnetic flux, can determine the absolute angle of magnetic flux clearly.
Secondly, a plurality of magnetized areas groupings can dispose so that just each intensity with reference to magnetized area to be made to be different.In the case, absolute angle can utilize the intensity with reference to magnetized area that has just detected as reference to be determined.
Even when each magnetized area disposes to such an extent that consequently magnetic flux density reduces gradually, also same effect can take place.
(the 12 embodiment)
Realize the 12nd embodiment of the present invention below in conjunction with Figure 17 and 18 explanations.At this, will be given identical Reference numeral and symbol with identical each member of in the 11 embodiment, mentioning and will omit explanation it.
Figure 17 is the partial enlarged view that is used in according to the scrambler 315 among the rotation detecting device of realizing the 12nd embodiment of the present invention.In the present embodiment, scrambler 315 is located opposite to sensor 320, similar scrambler 310.
Scrambler 315 has annular, and this annular has predetermined axial width.The sensor counter surface of scrambler 315 constitutes by dispose a plurality of N utmost points 316 with equidistant from distance on hoop.A plurality of N utmost points 316 are the magnetized areas with different each magnetic flux density.The dorsal part of sensor counter surface is magnetized by the S utmost point.
Each magnetized area that constitutes scrambler 315 has one with reference to magnetized area, and it has minimum magnetic flux density.Each magnetized area is given separately under the situation of reference polairzed area as reference, it seems each magnetic flux density that deasil progressively increases from magnetized area to next magnetized area in the sensor place.Point says that in the present embodiment, each magnetized area is given separately as each magnetic flux density that meets equation 1 among the 11 embodiment in detail.
Thereby so each N utmost point 316 of configuration forms magnetic field around self, and the intensity that this magnetic field has is corresponding to separately polarity and magnetic flux density.Therefore, be formed on around the scrambler 315 corresponding to the magnetic field of the intensity of N utmost point magnetic flux density.Scrambler 315 is stored in the control circuit that is not drawn reference as the rotating shaft absolute angle with reference to the position (angle is set) of magnetized area.
Scrambler 315 rotates along with the rotation of rotating shaft 302.Sensor 320 is exported to the control circuit that is not drawn via cable 322 according to magnetic flux intensity that is formed by the N utmost point 316 that is located opposite to sensor 320 and steering handle current value.
Figure 18 is the figure line that illustrates the output signal that is detected by sensor 320.In Figure 18, ordinate is represented the intensity of output signal and the horizontal ordinate express time.The size of output signal is proportional to the intensity of magnetic flux and the symbol of output signal is determined by the direction of magnetic flux.At this, appear at that leftmost pulse is the pulse that magnetic flux generated that is formed by the reference magnetized area among Figure 18.Figure 18 shows that the intensity of peak value of pulse increases with step-wise manner in time.Therefore, under the situation of Figure 18, control circuit is judged rotating shaft 302 and is rotated on the direction that the intensity of the N utmost point increases, that is, it seems from sensor 320 and to rotate counter-clockwisely.Then, the control circuit number goes out number of peaks that time per unit detects and the number of peaks that goes out according to number and each magnetized area are provided with the spacing of being complied with and calculate velocity of rotation.
Secondly, control circuit can be determined the absolute angle of rotating shaft according to the intensity of peak value of pulse.In the present embodiment, the output pulse of sensor 320 has mild peak value.Therefore, compare with first embodiment, angular resolution goes down.Control circuit has the threshold value that angle is set corresponding to a plurality of magnetized areas.Secondly, when control circuit detects detected value above threshold value, just can judge that scrambler passes through corresponding angle.
As mentioned above, according to present embodiment, scrambler 315 and sensor 320 are provided with opposite each otherly vertically.Secondly, scrambler 315 in the face of the surface of sensor by a plurality of dispose so that the N utmost point that increases gradually of magnetic flux density constitute.Therefore, single-sensor 320 can be in order to velocity of rotation, direction and the angle that detects rotating shaft 302 simultaneously, make may take place with the 11 embodiment in identical effect.
In the present embodiment, the surface in the face of sensor owing to scrambler is that each the N utmost point that is only increased gradually by its magnetic flux constitutes.Therefore detected peak value like this is mild.Therefore, compare with the situation of having only a peak value, the percent that peak value detects the error appearance is minimized, and making may be with higher reliability detection peak.
Though the present invention is illustrated by the situation that a plurality of N utmost points constitute with reference to the surface in the face of sensor of scrambler that the surface in the face of sensor of scrambler also can be made of a plurality of S utmost points.In the case, the detection of velocity of rotation, rotation direction and absolute angle be with present embodiment in identical mode make, the symbol of the just output signal of exception is conversely.
(the 13 embodiment)
Realize that the 13rd embodiment of the present invention will be illustrated in detail in conjunction with Figure 19 and 20.At this, will be given identical Reference numeral and symbol with each identical components mentioned among the 11 embodiment, and will omit explanation them.
Figure 19 illustrates a kind of deep groove ball bearing as the belt sensor bearing, wherein is equipped with according to the rotation detecting device of realizing the 13rd embodiment of the present invention.Deep groove ball bearing has outer ring 303, inner ring 304, a plurality of ball 307 as rolling member, sealing ring 308 and seat ring 309.
In the present embodiment, sealing ring 308 can stop and be sealed between outer ring 303 and the inner ring 304 and puts one of the both ends open in ball space 307.Putting in the both ends open in ball space 307 another is stopped by scrambler holding part 331 and sensor card gripping member 341 and is sealed.
Sensor card gripping member 341 is an annular element, has the C tee section with parallel two ends.Sensor card gripping member 341 is fixed in an axial end 303c of outer ring 303 and 303 stretches out vertically from the outer ring.The sensor of radially facing 340 is set on the radially inboard of sensor card gripping member 341.
Scrambler holding part 331 is annular elements, has L shaped cross section.Scrambler holding part 331 is fixed in an axial end 304b of inner ring 304, and stretches out in inner ring 304 edge axles.The front end of sensor card gripping member 341 is arranged between the two ends of sensor card gripping member 341.Scrambler holding part 331 and sensor card gripping member 341 are fitted to each other and play the effect identical with sealing ring 308.On a radially side of scrambler holding part 331, scrambler 330 is set.Scrambler 330 is disposed radially to such an extent that be opposite to sensor 340.
Figure 20 be the diagram scrambler 330 skeleton view and Figure 21 is the partial enlarged view of Figure 20.Scrambler 330 has annular, in the axial direction than having bigger width diametrically.Scrambler 330 make have a plurality of with the N utmost point 332 and the S utmost point 333 of equidistant from distance along the hoop alternate configurations.A plurality of N utmost points 332 are each magnetized areas with different each magnetic flux density with the S utmost point 333.
The magnetized area that constitutes scrambler 330 has one separately with reference to magnetized area, and this zone has certain minimum magnetic flux density.Secondly, each magnetized area is given the magnetic flux density that deasil increases gradually to next magnetized area from magnetized area from ball 307 under as the situation of reference at the reference magnetized area separately.The magnetic flux density of a plurality of magnetized areas is shown by above-mentioned equation 1 in the present embodiment.
So the N utmost point 332 of configuration and the S utmost point 333 form magnetic field around self separately, and the intensity that this magnetic field has is for its polarity and magnetic flux.Therefore, around the magnetic field of scrambler 330 formation corresponding to the intensity of the N utmost point 332 and the S utmost point 333 magnetic flux densities.The position with reference to magnetized area of scrambler 330 (angle is set) is stored among the unillustrated in the drawings control circuit as the reference of rotating shaft absolute angle.
Sensor 340 is magnetic sensors, can detect the magnetic field that is formed by scrambler 330.Sensor 340 is provided with near the surface of scrambler 330 and the magnetic field that can sensing be formed by each magnetized area.As a kind of at this available sensor 320 that is similar to the 11 embodiment of sensor 340.
Scrambler 330 rotates along with the rotation of rotating shaft 302.Sensor 340 according to the intensity and the direction of the N utmost point 332 that is located opposite to sensor 340 and the S utmost point 333 formed magnetic flux, is exported to unillustrated control circuit among the figure to current value via cable 322.
The output signal that is detected by sensor 320 is similar to those shown among Figure 16.As among the 11 embodiment, the size of output signal is proportional to the intensity of magnetic flux and the symbol of output signal is determined by the direction of magnetic flux.
In the case, control circuit is judged rotating shaft and is rotated on the direction that the N utmost point 332 and the S utmost point 333 intensity increase.That is it seems that from ball 307 inhour rotates.Then, the control circuit number goes out the number of time per unit peak value and with each magnetized area the spacing of being complied with is set according to the peak value number that number goes out to calculate velocity of rotation.
Secondly, control circuit is determined the absolute angle of rotating shaft according to peak strength.Under the situation of detecting sensor output peak value (some A or C among Figure 16), control circuit is judged, and is located opposite to sensor 340 corresponding to the magnetized area of detected output like this.Then, control circuit is judged, and rotating shaft is arranged on the absolute angle place corresponding to detected magnetized area like this.
In addition, under the output of sensor was situation at the numerical value at the some B place in the middle of each peak value, the absolute angle of some B was according to the intensity at the peak point A place of front to be come out in an A place and the ratio calculation of putting the difference between the intensity at B place.Say a bit that in detail the angle at some B place is calculated according to equation 2.
As mentioned above, according to present embodiment, scrambler 330 and sensor 340 are disposed radially opposite each otherly.Secondly, scrambler 330 by a plurality of dispose so that magnetic flux density each N utmost point 332 and each S utmost point 333 of reducing gradually constitute.Therefore, single-sensor 340 can in order to detect speed, direction and the angle that rotating shaft 302 is rotated simultaneously, make may take place with the 11 embodiment in identical effect.
Secondly, in the present embodiment, because outer ring 303 and inner ring 304, scrambler 330 and the sensor 340 of bearing are made one, so, if scrambler and sensor before be installed on the bearing, then can just, bearing finish assembling by being placed between rotating shaft and the shell.Therefore, packaging efficiency can improve and help to reduce assembly cost.
Moreover, can be applied to illustrated belt sensor bearing in first to the tenth embodiment any with rotation detecting device identical in the present embodiment.
(the 14 embodiment)
Below in conjunction with Figure 22 the realization 12nd embodiment of the present invention is described.At this, will give identical Reference numeral and symbol and will omit its explanation with member identical among the 11 to the 13 embodiment.
Figure 22 is the partial enlarged view that is used in the scrambler 335 in a kind of belt sensor bearing, and this bearing has the rotation detecting device according to the realization fourteenth embodiment of the invention that is mounted in it.In the present embodiment, scrambler 335 is located opposite to sensor 340, is similar to scrambler 330.
Scrambler 335 is annular, has predetermined axial width.The sensor counter surface of scrambler 335 constitutes by disposing a plurality of N utmost points 336 with equidistant from distance along hoop.A plurality of N utmost points 336 are each magnetized areas with different each magnetic flux density.Scrambler 335 is to give magnetized by the S utmost point on the side that is opposite to sensor at it.
Each magnetized area that constitutes scrambler 335 has one with reference to magnetized area, has minimum magnetic flux density.Each magnetized area is given each magnetic flux density that deasil increases gradually from magnetized area to next magnetized area from ball 307 at the reference magnetized area under as the situation of reference separately.In detail a bit say that in the present embodiment, each magnetized area among the 11 to the 13 embodiment, is given each magnetic flux density according to equation 1 separately.
Thereby so each N utmost point 336 of configuration constitutes a magnetic field around it, and the intensity that this magnetic field has is corresponding to each polarity and magnetic flux density.Therefore, be formed on around the scrambler 335 corresponding to the magnetic field of the intensity of N utmost point magnetic flux density.Scrambler 335 stores in the unillustrated in the drawings control circuit reference as the rotating shaft absolute angle with reference to the position (angle is set) of magnetized area.
Scrambler 335 rotates along with the rotation of rotating shaft 302.Sensor 340 according to the magnetic flux density and the direction that are formed by the N utmost point that is located opposite to sensor 340, outputs to unillustrated control circuit among the figure to current value via cable 322.
Shown in the output signal that is detected by sensor 340 is similar among Figure 18.In Figure 18, ordinate is represented the intensity of output signal and the horizontal ordinate express time.The size of output signal is proportional to the intensity of magnetic flux and the symbol of output signal is determined by the direction of magnetic flux.At this, appear at that the pulse on the Far Left is the pulse that is generated by the formed magnetic flux of reference magnetized area among Figure 18.Figure 18 shows that the intensity of peak value of pulse increases with step-wise manner in time.Therefore, under the situation of Figure 18, control circuit is judged, and rotating shaft 302 is rotated on the direction that the N utmost point 336 intensity increase, that is, it seems that from sensor 340 inhour rotates.Then, the control circuit number goes out the detected peak value number of time per unit and with each magnetized area the spacing of being complied with is set according to the peak value number that number goes out to calculate velocity of rotation.
Secondly, control circuit is determined the absolute angle of rotating shaft according to the intensity of peak value of pulse.In the present embodiment, the output pulse of sensor 340 has mild peak value.Therefore, with the same under the situation of the 12 embodiment, compare with the 11 embodiment, angular resolution has lowered.Control circuit has the threshold value that angle is set of corresponding each magnetized area.Secondly, when control circuit predicts detected value above threshold value, judge that then scrambler is through corresponding angle.
As mentioned above, according to present embodiment, scrambler 335 and sensor 340 are disposed radially opposite each otherly.Secondly, the sensor counter surface of scrambler 335 by a plurality of dispose so that the N utmost point 336 that increases gradually of magnetic flux density constitute.Therefore, single-sensor 340 can in order to detect speed, direction and the angle that rotating shaft 302 is rotated simultaneously, make may present with the 11 embodiment in identical effect.
In the present embodiment, because each N utmost point that the sensor counter surface of scrambler is just increased gradually by its magnetic flux density constitutes, thereby detected peak value like this is mild.Therefore, compare with the situation that is a peak value, the percent that peak value detects the error generation has reduced, and making may be with higher reliability detection peak.
Though present embodiment illustrated by the situation that a plurality of N utmost points constitute with reference to the sensor counter surface of scrambler,, the sensor counter surface of scrambler also can be made of a plurality of S utmost points.In the case, the detection of velocity of rotation, rotation direction and absolute angle be with present embodiment in identical mode realize the just opposite in sign of output signal of exception.
Secondly, in the present embodiment, because outer ring 303 and inner ring 304, scrambler 335 and the sensor 340 of bearing are made one, so, if scrambler and sensor originally be contained on the bearing, then can finish assembling as long as bearing is arranged between rotating shaft and the shell.Therefore, packaging efficiency can improve, thereby helps to reduce assembly cost.
Moreover, can be used for any one illustrated belt sensor bearing with rotation detecting device identical in the present embodiment at first to the tenth embodiment.
(the 15 embodiment)
Below with reference to Figure 23 the realization 15th embodiment of the present invention is described.At this, will be given identical Reference numeral and symbol with the identical member of mentioning among the 11 to the 14 embodiment and will omit its explanation.
Figure 23 diagram wherein is equipped with the rotation detecting device according to realization the of the present invention the 13 or the 14 embodiment as a kind of deep groove ball bearing of belt sensor rolling bearing.In the present embodiment, the outer ring 303 of deep groove ball bearing and inner ring 304 have the sensor mounting portion 303d and the scrambler mounting portion of stretching vertically respectively.
On the 304d of the outside vertically of scrambler mounting portion 304c, scrambler 350 is set.As scrambler 350, can be used on illustrated scrambler 330 or 335 among the 13 or the 14 embodiment at this.An axial side of scrambler 350 is opposite to sensor mounting portion 303d.
On the other hand, on the inboard 303e of axle of sensor mounting portion 303d, annular steel disc 385 is set uprightly.Lip ring 380 is supported with the gap between seal sensor mounting portion 303d and the scrambler mounting portion 304c by steel disc 385.
Secondly, on the axial inboard 303e of sensor mounting portion 303d, sensor mount 375 is set.Sensor mount 375 is between sealing ring 308 and seal 380.
The sensor 360 that temperature measuring equipment 370 is set on sensor mount 375 and makes by Hall element etc.Sensor 360 is located opposite to scrambler 350 and can detects the magnetic flux that is formed by scrambler 350.Sensor 360 with the 13 and the 14 embodiment in identical mode detect magnetic flux and thereby detect velocity of rotation, rotation direction and the absolute angle of rotor.
But the temperature data that the temperature of temperature measuring equipment 370 determination sensors and scrambler and each surrounding member and output so record is given unillustrated control circuit among the figure.The magnetized area that constitutes scrambler 350 varies with temperature and changes magnetic flux density.Control circuit has a form, changes so as to proofreading and correct temperature variant magnetic flux density.Secondly, control circuit utilizes this form to proofread and correct detected for this reason output valve and detects velocity of rotation, rotation direction and the absolute angle of rotating shaft.Under the situation of using such non-contact thermometer such as thermopair, can detect temperature such as the so nonrotational part of sensor, but under the situation of using such non-contact thermometer such as infrared radiation thermometer, the just feasible temperature that may detect such as the such tumbler of scrambler.
As mentioned above, according to present embodiment, the output valve of proofreading and correct according to temperature variation can be in order to detect spindle speed, rotation direction and the absolute angle of rotating shaft.Therefore, scrambler 350 is adopted to scrambler 350 various operational temperature conditions without a moment's thought, is worth more broadly being applied to bearing and tourelle to this rotary state detecting device.
Chipware gap between scrambler and the sensor (core gap) is with expanding with heat and contract with cold and change.This core body gap changes and can be proofreaied and correct according to the signal from temperature measuring equipment.
Secondly, in the present embodiment, scrambler 350 and sensor 360 are sealed by sealing ring 308 and seal 380.Therefore, it is minimum that external action can reduce to, and makes and may make measurement with degree of precision.
Moreover scrambler 350 and sensor 320 are provided with radially opposite each otherly.Secondly, scrambler 310 by a plurality of dispose so that magnetic flux density the N utmost point 312 and the S utmost point 313 that gradually change constitute.Therefore, single-sensor 320 can be in order to velocity of rotation, direction and the angle that detects rotating shaft 302 simultaneously, make may present with the 11 embodiment in identical effectiveness.
The bearing that secondly, can be used for any one illustrated belt sensor of first to the tenth embodiment with rotation detecting device identical in the present embodiment.
(the 16 embodiment)
To explain the realization 16th embodiment of the present invention in conjunction with Figure 24 to 28.Figure 24 illustrates a kind of deep groove ball bearing as tourelle, wherein is equipped with according to the rotation detecting device of realizing the 16th embodiment of the present invention.Deep groove ball bearing has outer ring 403, inner ring 404, a plurality of ball 407 as rolling member, sealing ring 408 and retainer 409.
The inside surface 401a of shell 401 is fixed in as static element in outer ring 403.Outer ring 403 is to stand to forge or similar technology is made by making such as the such metal material of carbon steel.Outer ring 403 has outer raceway 405, is used to guide ball 407 on its surface that sets within it.
Inner ring 404 is to stand to forge or similar technology is made by making such as the such metal material of carbon steel, and it is such to be similar to outer ring 403.Inner ring 404 is fitted on the outside surface 402a as the rotating shaft 402 of tumbler.Inner ring 404 has interior raceway 406, is provided with on its outer surface, and the outer raceway 405 corresponding to outer ring 403 is used to guide ball 407.Inner ring 404 is along with the rotation and the rotating shaft 402 of rotating shaft 402 are rotated with being integral.
Each ball 407 is arranged on the line between the interior raceway 406 of the outer raceway 405 of outer ring 403 and inner ring 404.Each ball 407 rolls across outer ring 405 and inner ring 406 under the situation that is accompanied by 404 rotations of rotating shaft 402 rotary inner rings.
Sealing ring 408 stop and sealed outer ring 403 and inner ring 404 between put two openings in the space 407 of ball.Sealing ring 408 can prevent that dust, moisture, foreign matter etc. from entering the space and the lubricant that put ball and spilling from the space that puts ball.Sealing ring 408 is fixed on the fixed part 403b that is formed on 403 inside surfaces of outer ring.
Retainer 409 rollably is held in ball 407 between outer race 405 and the inside race 406.As retainer 409, can use pressing cage, machine work retainer.
The scrambler holding part 411 of annular uprightly is set on the outside surface 402a of rotating shaft 402.Scrambler holding part 411 stretches to shell 401 from the outside surface 402a of rotating shaft 402, that is radially outside from rotating shaft 402.The scrambler of facing vertically 410 is set on an axial side of scrambler holding part 411.
On the other hand, on the inside surface 401a of shell 401, sensor card gripping member 421 is set uprightly.Sensor card gripping member 421 is stretched to rotating shaft 402 from the inside surface 401a of shell 401, that is radially inside from shell 401.On an axial side of sensor card gripping member 421, single-sensor 420 is set.Sensor 420 is located opposite to scrambler 410 vertically.
Figure 25 is a plan view, scrambler 410 is shown, and Figure 26 is the local enlarged perspective of Figure 25.Scrambler 410 has the annular shape of constant radial width.Scrambler 410 has a plurality of staged sensor counter surface 410a and a straight scrambler fabricated section earthed surface 410b.Scrambler 410 is fixed in scrambler fabricated section 411 at scrambler fabricated section earthed surface 410b place.The normal direction of scrambler fabricated section earthed surface 410b is with axially identical.
Shown among Figure 26, a plurality of sensor counter surface 410a are circumferentially separated by the step edge with axial height h1.With O is that the center is every central angle θ 0Form a step, so that every central angle θ 0Along the sensor counter surface of circumferentially having cut apart scrambler.Therefore, the height H of the sensor counter surface 410a from scrambler fabricated section earthed surface 410b to scrambler is every central angle θ 0Increase h1.
Therefore, the axial height H of scrambler 410 starts from as the sensor counter surface 410a of the most close scrambler fabricated section earthed surface 410b of reference to away from the sensor counter surface 410a of scrambler fabricated section earthed surface 410b, every central angle θ 0Increase h1 monotonously.In the present embodiment, be provided with sensor counter surface 410a by the sensor counter surface 910a of the most close scrambler fabricated section earthed surface 410b away from scrambler fabricated section earthed surface 410b.Secondly, in the present embodiment, scrambler 410 is provided with following configuration, and promptly height H be it seems from sensor and increased h1 counter-clockwisely.Therefore, the distance between scrambler 410 and the sensor 420 along with the rotation of rotating shaft 402 according to the change of shape of sensor counter surface 410a.Distance between scrambler 410 and the sensor 420 is stored among the unillustrated in the drawings control circuit by angle.Moreover control circuit can store the position of a plurality of sensor counter surface 410a and the absolute angle of rotating shaft 402 interrelatedly.
Sensor 420 is located opposite to the sensor counter surface 410a of scrambler 410 vertically.Sensor 420 is displacement transducers, utilizes light or ultrasound wave to measure the sensor counter surface 410a of scrambler 410 and the variable in distance between the sensor 420.Sensor 420 is to the sensor counter surface 410a of scrambler 410 output light or ultrasound wave.So the light or the ultrasound wave of output are reflected by sensor counter surface 410a then.Light that sensor 420 receptions are so reflected or ultrasound wave are with the displacement of determination sensor counter surface shape.Sensor 420 is exported detected range data like this via cable 422 unillustrated control circuit in figure.
Figure 27 is a figure line, and diagram is by sensor 420 detected output signals.In Figure 27, ordinate is represented the intensity of output signal and the horizontal ordinate express time.In Figure 27, dotted line is represented output signal.The corresponding distance with sensor of the size of output signal, and the sensor counter surface is the closer to sensor, and the intensity of output signal is big more.At this, appear at the pulse that detected value when the sensor counter surface of the most close scrambler fabricated section earthed surface is located opposite to sensor 420 is represented in the pulse on the high order end among Figure 27.Figure 27 shows that the intensity of peak value of pulse increases with step-wise manner in time monotonously.
As previously mentioned, in the present embodiment, scrambler 410 is provided with following configuration, promptly it seems that from sensor 420 height H increases h1 counter clockwise gradually.Therefore, under the situation of Figure 27, control circuit is judged, and scrambler 410, that is rotating shaft it seems from sensor to clockwise rotate.
Shown among Figure 27, the output of sensor 420 has signal by the sensor counter surface 410a of the most close sensor 420 reflection as peak-peak.The control circuit number goes out this peak-peak and calculates the velocity of rotation of rotating shaft 402 according to the peak-peak number that time per unit obtains.
Secondly, control circuit can be determined the absolute angle of rotating shaft according to pulse strength.In the present embodiment, the output of sensor 420 accords with the shape of scrambler 410 but is step-like.Control circuit can store the absolute angle and the detected value of different shape parallel with one anotherly.Then, control circuit is judged the angle that rotating shaft is provided with the place according to detected value.Like this, can be in angle-resolved range Theta 0Within carry out the detection of rotating shaft 402 absolute angle.
As mentioned above, according to present embodiment, scrambler 410 and sensor 420 are provided with opposite each otherly vertically.Secondly, scrambler 410 has formation sensor counter surface 410a thereon, so that increases monotonously with the distance of sensor 420 or reduce.Sensor 420 is by utilizing light and hyperacoustic displacement transducer to make.Sensor 420 is according to coming output signal output to control circuit with the distance of sensor counter surface 410a.Control circuit is analyzed this output signal to detect speed, direction and the angle that rotating shaft 402 is rotated.Therefore, signal transducer 420 can detect speed, direction and the angle that rotating shaft 402 is rotated simultaneously, makes may present as the identical effectiveness among the 11 embodiment.
In the present embodiment, sensor 420 is to utilize light or hyperacoustic displacement transducer.But, sensor 420 is not subjected to concrete restriction, if it be a kind of can determination sensor counter surface 410a and sensor 420 between the sensor of variable in distance.As sensor 420, can advise a kind of magnetic sensor at this, promptly a kind ofly utilize interactional sensor between magnetic field and the eddy current etc. as example.Under the situation of using magnetic sensor, scrambler is a magnetic material.Utilizing under the sensor situation of eddy current, scrambler need be such as the such ferromagnetic material of metal material.
(the 17 embodiment)
Below in conjunction with Figure 28 the realization 17th embodiment of the present invention is described.At this, will be given identical Reference numeral and symbol with identical member mentioned in the 16 embodiment, and its explanation will be omitted.
In the present embodiment, in Figure 24, on an axial side of scrambler holding part 411, scrambler 415 is set.On the other hand, on an axial side of sensor card gripping member 421, single-sensor 425 is set.Sensor 425 is located opposite to scrambler 415 vertically.
Figure 28 is used in according to local enlarged perspective among the rotation detecting device of realizing the 17th embodiment of the present invention, scrambler.In the present embodiment, scrambler 415 is similar to scrambler 410 and is located opposite to sensor 425.
Scrambler 415 has annular, and radial width is constant.Scrambler 415 has sensor counter surface 415a and straight scrambler fabricated section earthed surface 415b of a plurality of steps.Scrambler 415 is fixed in scrambler fabricated section 411 at scrambler fabricated section earthed surface 415b place.The normal direction of scrambler fabricated section earthed surface 415b is with axially identical.
Shown among Figure 28, a plurality of sensor counter surface 415a by step with axial height h1 along circumferentially spaced.Step is that the center is every central angle θ with O 0Form, so that every central angle θ 0Along the sensor counter surface of circumferentially having cut apart scrambler.Therefore, the height H of the sensor counter surface 415a from scrambler fabricated section earthed surface 415b to scrambler is every central angle θ 0Increase h1.
Therefore, the axial height H of scrambler 415 starts from as the sensor counter surface 415a of the most close scrambler fabricated section earthed surface 415b of reference to away from the sensor counter surface 415a of scrambler fabricated section earthed surface 415b, every central angle θ 0Increase h1 monotonously.In the present embodiment, be provided with sensor counter surface 415a by the sensor counter surface 415a of the most close scrambler fabricated section earthed surface 415b away from scrambler fabricated section earthed surface 410b.Secondly, in the present embodiment, scrambler 415 is provided with following configuration, and promptly height H be it seems from sensor and increased h1 in counter-clockwise direction.Therefore, the distance between scrambler 415 and the sensor 425 along with the rotation of rotating shaft 402 according to the change of shape of sensor counter surface 415a.Distance between scrambler 415 and the sensor 425 is stored among the unillustrated in the drawings control circuit by angle.Moreover control circuit can store the position of a plurality of sensor counter surface 415a and the absolute angle of rotating shaft 402 interrelatedly.
The sensor counter surface 415a of scrambler 415 is from being furnished with the N utmost point 437.Each magnetized area that constitutes the N utmost point 437 has predetermined magnetic flux density separately, and the N utmost point 437 forms magnetic field around self, and the intensity that this magnetic field has is corresponding to its polarity and magnetic flux density.Therefore, around the magnetic field of scrambler 415 formation corresponding to the magnetic flux density of the N utmost point 437.
As the material of scrambler 415, this available alnico magnet, ferrite magnet, samarium-cobalt magnet, neodymium-iron-boron magnets or by various ferromagnetic powders are mixed with plastics, molded mixture and solidify the bonded magnet that moulding material obtains.Because the magnetic flux density of a plurality of magnetized areas must be consistent, thus bonded magnet preferably adopted, because it can design easily to have any magnetic flux density.At this, adopt a kind of bonded magnet of making by plastics that contain ferrite dust or rare earth material.The magnetic force of magnet varies with temperature.
Sensor 425 is located opposite to the sensor counter surface 415a of scrambler 415 vertically.Sensor 425 is magnetic sensors, can measure the sensor counter surface 415a of scrambler 415 and the variable in distance between the sensor 425.At using a kind of magnetic sensor such as the Hall element or coil that can detect magnetic field, particularly Hall element is illustrated present embodiment by example.Hall element is a kind ofly can generate the device of electric current as output signal according to the intensity of the magnetic flux that passes Hall element and direction.
But the magnetic field that sensor 425 sensings are formed by each N utmost point 437 of scrambler 415.The intensity in the magnetic field that is formed by the N utmost point 437 is respectively along with reducing or increase and increase or reduce apart from it between sensor counter surface 415a of the N utmost point 437 and scrambler 415.But the Strength Changes in sensor 425 sensing magnetic fields is also exported detected values via cable 422 and is given unillustrated control circuit among the figure.
Detect output signal by sensor 425 and be shown among Figure 27, among Figure 27, solid line is represented output signal.The size of output signal is proportional to detected magnetic flux intensity and the symbol of output signal is determined by the direction of magnetic flux.At this, appear at the pulse that detected value when the sensor counter surface 415a that is close to most scrambler fabricated section earthed surface 415b is located opposite to sensor 425 is represented in the pulse on the high order end among Figure 27.Figure 27 shows that the intensity of peak value of pulse increases in time monotonously in the step mode basically.
As previously mentioned, in the present embodiment, scrambler 415 is provided with following configuration, promptly it seems that from sensor 425 height H increases h1 in counter-clockwise direction.Therefore, under the situation of Figure 27, control circuit can be judged, and scrambler 415, that is rotating shaft it seems from sensor to clockwise rotate.
Shown among Figure 27, the output of sensor 425 has signal by the sensor counter surface 415a reflection that is close to most sensor 425 as peak-peak.The control circuit number goes out this peak-peak and calculates the velocity of rotation of rotating shaft 402 according to the peak-peak number that time per unit obtains.
Secondly, control circuit can be determined the absolute angle of rotating shaft according to pulse strength.In the present embodiment, to meet the shape of scrambler 415 be step-like in the output of sensor 425.Control circuit can store the absolute angle and the detected value of different shape interrelatedly.Then, control circuit is judged the angle that rotating shaft is provided with the place according to detected value.Like this, the detection of rotating shaft 402 absolute angle can be in angle-resolved range Theta 0Within make.
Secondly as mentioned above, according to present embodiment, scrambler 415 and sensor 425 are provided with opposite each otherly vertically, and, scrambler 415 has formation sensor counter surface 415a thereon, so that increase monotonously with the distance of sensor 425 or reduce.Sensor 425 is made of magnetic sensor and sensor counter surface 415a is furnished with the N utmost point 437.Sensor 425 outputs to control circuit to output signal according to the distance with sensor counter surface 415a.Control circuit is analyzed this output signal to detect speed, direction and the angle that rotating shaft 402 is rotated.Therefore, single sensor 425 can in order to detect speed, direction and the angle that rotating shaft 402 is rotated simultaneously, make may present with the 11 embodiment in identical effectiveness.
In the present embodiment, because the sensor counter surface 415a of scrambler only is made of each N utmost point, so detected peak value like this is mild.Therefore, compare with the situation of having only a peak value, the percent that peak value detects the error appearance has reduced, and making may be with higher reliability detection peak.
Though present embodiment is described by the situation that a plurality of N utmost points constitute with reference to the sensor counter surface of scrambler 415,, the sensor counter surface of scrambler 415 also can be made of a plurality of S utmost points.In the case, the detection of velocity of rotation, rotation direction and absolute angle with present embodiment in identical mode make, exception be that the symbol of output signal conversely.
(the 18 embodiment)
Realize the 18th embodiment of the present invention below in conjunction with Figure 29 and 30 explanations.At this, will be given identical Reference numeral and symbol with identical member mentioned among the 16 or the 17 embodiment and will omit its explanation.
In the present embodiment, in Figure 24, on an axial side of scrambler holding part 411, scrambler 416 is set.On the other hand, on an axial side of sensor card gripping member 421, single sensor 425 is set.Sensor 425 is located opposite to scrambler 416 vertically.
Figure 29 is the local enlarged perspective of scrambler 416, and scrambler is used in according among the rotation detecting device of realizing the 18th embodiment of the present invention.In the present embodiment, scrambler 416 is provided with to such an extent that be similar to scrambler 410 and 415 and be opposite to sensor 425.
Scrambler 416 has annular shape, and radial width is constant.Scrambler 416 has a plurality of step sensor counter surface 416a and a straight scrambler fabricated section earthed surface 416b.Scrambler 416 is fixed in scrambler fabricated section 411 at scrambler fabricated section earthed surface 416b place.The normal direction of scrambler fabricated section earthed surface 416b is with axially identical.
Shown among Figure 29, a plurality of sensor counter surface 416a by step with axial height 11 along circumferentially spaced.With O is that the center is every central angle θ 0Form step, so that the edge is circumferentially every angle θ 0The sensor counter surface of having cut apart scrambler.Therefore, the height L of the sensor counter surface 416a from scrambler fabricated section earthed surface 416b to scrambler is every angle θ 0 Increase 11.
Therefore, the axial height L of scrambler 416 starts from as the sensor counter surface 416b of the most close scrambler fabricated section earthed surface 416b of reference to away from the sensor counter surface 416a of scrambler fabricated section earthed surface 416b, every central angle θ 0 Increase 11 monotonously.In the present embodiment, be provided with sensor counter surface 416a by the sensor counter surface 416a of the most close scrambler fabricated section earthed surface 416b away from scrambler fabricated section earthed surface 416b.Secondly, in the present embodiment, scrambler 416 is provided with following configuration, and promptly height L it seems from sensor and increases 11 in counter-clockwise direction.Therefore, the distance between scrambler 416 and the sensor 425 along with the rotation of rotating shaft 402 according to the change of shape of sensor counter surface 416a.Distance between scrambler 416 and the sensor 425 is stored among the unillustrated in the drawings control circuit by angle.Moreover control circuit can store the position of a plurality of sensor counter surface 416a and the absolute angle of rotating shaft 402 interrelatedly.
The sensor counter surface 416a of scrambler 416 is furnished with a plurality of N utmost points 437 and the S utmost point 438 separately.The magnetized area that constitutes the N utmost point 437 and the S utmost point 438 has predetermined magnetic flux density separately.The N utmost point 437 and the S utmost point 438 form magnetic field around self separately, and the intensity that has is corresponding to its polarity and magnetic flux density.Therefore, around the magnetic field of scrambler 416 formation corresponding to the magnetic flux density of the N utmost point 437 and the S utmost point 438.
As the material of scrambler 416, this available alnico magnet, ferrite magnet, samarium-cobalt magnet, neodymium-iron-boron magnets or by various Magnaglos are mixed with plastics, molded mixture and solidify the bonded magnet that moulding material obtains.Because the magnetic flux density of a plurality of magnetized areas must be consistent, thus bonded magnet preferably used, because it can design easily to have any magnetic flux density.At this, use a kind of bonded magnet of making by plastics that contain ferrite dust or rare earth material.The magnetic force of magnet varies with temperature.
Sensor 425 is the magnetic sensors that can detect magnetic field, as Hall element and the coil of being explained among the 17 embodiment.
But the magnetic field that sensor 425 sensings are formed by a plurality of N utmost points 437 and the S utmost point 438 of scrambler 415.The intensity absolute value in the magnetic field that is formed by the N utmost point 437 and the S utmost point 438 is reducing or increase and increase or reduce along with distance between the sensor counter surface 416a of the N utmost point 437 or the S utmost point 438 and scrambler 416 respectively.But the variation of sensor 425 sensing magnetic field intensitys is also exported detected values via cable 422 and is given unillustrated control circuit among the figure.
Figure 30 diagram is by sensor 425 detected output signals.The size of output signal is proportional to the symbol of the intensity output signal of detected magnetic flux and is then determined by the direction of magnetic flux.At this, appear at the pulse that detected value when the sensor counter surface 416a of the most close scrambler fabricated section earthed surface 416b is located opposite to sensor 425 is represented in the pulse on the high order end among Figure 30.Figure 30 shows that the absolute value of peak value of pulse intensity increases with step-wise manner basically in time monotonously.
As previously mentioned, in the present embodiment, scrambler 416 is provided with following configuration, and promptly height L it seems from sensor 425 and increases 11 in counter-clockwise direction.Therefore, under the situation of Figure 27, control circuit is judged, and scrambler 416, that is rotating shaft 402 it seems from sensor to clockwise rotate.
Shown among Figure 30, the output of sensor 425 has signal by the sensor counter surface 416a of the most close sensor 425 reflection as peak-peak.The control circuit number goes out this peak-peak and the number of the peak-peak that obtains according to time per unit is calculated the velocity of rotation of rotating shaft 402.
Secondly, control circuit is determined the absolute angle of rotating shaft 402 according to peak strength.When the output of sensor 425 showed peak detection values (the some A among Figure 30), control circuit was judged, and was located opposite to sensor 425 corresponding to the magnetized area of detected output like this.Then, control circuit is judged, and rotating shaft 402 is arranged on the absolute angle corresponding to detected magnetized area like this.
Secondly, when the output of sensor 425 is the value at some B place between two peak values, when the absolute angle of B can be calculated for an A place and the ratio of putting the difference between the B place intensity according to the intensity at the peak point A place of tight front.Say a bit that in detail the angle at some B place can be calculated by above-mentioned equation 2.
Control circuit stores the position of a plurality of sensor counter surface 416a and the absolute angle of rotating shaft 402 with can being relative to each other connection.Therefore, but control circuit with reference to the absolute angle of result's calculation code device of calculating by above-mentioned equation 2.
As mentioned above, according to the present invention, scrambler 416 and sensor 425 are provided with opposite each otherly vertically.Secondly, scrambler 416 has formation sensor counter surface 416a thereon, so that increases monotonously with the distance of sensor 425 or reduce.Sensor 425 be constitute by magnetic sensor and the N utmost point 437 and the S utmost point 438 alternately be set on sensor counter surface 416a.Sensor 425 is according to coming output signal output to control circuit with the distance of sensor counter surface 416a.Control circuit is analyzed this output signal to detect speed, direction and the angle that rotating shaft 402 is rotated.Therefore, single sensor 425 can in order to detect speed, direction and the angle that rotating shaft 402 is rotated simultaneously, make may present with the 11 embodiment in identical effectiveness.
In the present embodiment, with crossing scrambler with the sensor counter surface that constitutes by the N utmost point and the S utmost point.Therefore detected peak value like this is that point is steep, makes and may detect absolute angle with the angular resolution that is higher than among the 16 embodiment or the 17 embodiment.
(the 19 embodiment)
Describe the realization 19th embodiment of the present invention in detail below with reference to Figure 31 to 33.At this, will be given identical Reference numeral and symbol with identical member mentioned among the 16 to 19 embodiment and will omit its explanation.
Figure 31 diagram wherein is equipped with according to the rotation detecting device of realizing the 19th embodiment of the present invention as a kind of deep groove ball bearing of belt sensor bearing.Deep groove ball bearing has outer ring 403, inner ring 404, a plurality of ball 407 as rolling member, sealing ring 408 and back-up ring 409.
In the present embodiment, sealing ring 408 stop and sealed outer ring 403 and inner ring 404 between put one of two openings in the space of each ball 407.Another of two openings of each ball 407 stopped by scrambler holding part 431 and sensor card gripping member 441 and sealed.
Sensor card gripping member 441 is annular construction members, has the parallel C tee section in two ends.Sensor card gripping member 441 is fixed in the axial end portion 403C of outer ring 403 and 403 stretches out vertically from the outer ring.Radially inside top in sensor card gripping member 441 is provided with the right sensor of sagittal plane 440.
Scrambler holding part 431 is annular construction members, has L shaped cross section.Scrambler holding part 431 is fixed in the axial end portion 404b of inner ring 404 and stretches out vertically from inner ring 404.The front end of scrambler holding part 431 is arranged between two ends of sensor card gripping member 441.Scrambler holding part 431 and sensor card gripping member 441 be collaborative each other play a part identical with sealing ring 408.Radially side at scrambler holding part 431 is provided with scrambler 430.Scrambler 430 is disposed radially to such an extent that be opposite to sensor 440.
Figure 32 be the diagram scrambler 430 plan view and Figure 33 is the partial enlarged view of Figure 32.Scrambler 430 is to be made such as the so magnetized material that can give easily of ferromagnetic material by a kind of.Scrambler 430 has annular shape, and axial width is constant.Scrambler 430 has scrambler fabricated section earthed surface 430b, and this surface 430b is apart from ring heart O radius R 2; And having a plurality of sensor counter surface 430a, this surface 430a is arranged on apart from the position of ring heart radius R 1, and radius R 1 is every predetermined angle θ 0 Change once.Scrambler 430 is fixed in scrambler fabricated section 431 at scrambler fabricated section earthed surface 430b place.The normal direction traversed by of scrambler fabricated section earthed surface 430b is axial.
Shown among Figure 33, a plurality of sensor counter surface 430a by step with radial height r1 along circumferentially spaced.With O is that the center is every central angle θ 0Form step, so that the sensor counter surface of scrambler 430 is every angle θ 0Along circumferentially being cut apart.Therefore, from the center of scrambler 430 to the sensor counter surface 430a of scrambler 430 every angle θ 0Increase r1.
Therefore, the radius R 1 of scrambler 430 is from the sensor counter surface 430a with least radius R1 as reference, to the sensor counter surface 430a with maximum radius R1, every angle θ 0Increase r1.In the present embodiment, by sensor counter surface 430a the sensor counter surface 430a with maximum radius R1 is set with least radius R1.Secondly, in the present embodiment, scrambler 430 is provided with following configuration, promptly radius R 1 vertically (arrow A among Figure 31) it seems and increase gradually in the clockwise direction.Therefore, the distance between scrambler 430 and the sensor 440 is along with the rotation of rotating shaft 402 change of shape according to sensor counter surface 430a.Distance between scrambler 430 and the sensor 440 is stored among the unillustrated in the drawings control circuit according to angle.Moreover control circuit interrelatedly can store the position of a plurality of sensor counter surfaces and the absolute angle of rotating shaft 402.
Secondly, scrambler 430 can be provided with following configuration, promptly it seems that from axial (arrow A Figure 31) radius R 1 increases gradually on counter-clockwise direction.
Sensor 440 is disposed radially to such an extent that be opposite to the sensor counter surface 430a of scrambler 430.Sensor 440 is a kind of displacement transducers, can measure the sensor counter surface 430a of scrambler and the variable in distance between the sensor 440.Sensor 440 is similar to the sensor 420 of the 16 embodiment like that to the sensor counter surface 430a of scrambler 430 output light or ultrasound wave.So the light or the ultrasound wave of output are reflected by sensor counter surface 430a then.Light that sensor 440 receptions are so reflected or ultrasound wave are with the shape displacement of determination sensor counter surface.Sensor 440 is given unillustrated control circuit among the figure via cable 422 outputs detected range data like this.
By sensor 440 detected output signals with represent by dotted line among Figure 27 identical.At this, appear at the pulse that detected value when the sensor counter surface 430a with least radius R1 is located opposite to sensor 440 is represented in the pulse on the high order end among Figure 27.Figure 27 shows that the absolute value of peak value of pulse intensity increases monotonously in the step mode in time.
As previously mentioned, in the present embodiment, scrambler 430 is provided with following configuration, and (arrow A among Figure 31) it seems that radius R 1 increases in the clockwise direction gradually vertically promptly.Therefore, under the situation of Figure 27, control circuit is judged, scrambler 430, that is rotating shaft 402, and it seems that (arrow A among Figure 31) rotate on counter-clockwise direction vertically.
Secondly, control circuit go out as number among the 16 embodiment institute's detection signal peak-peak number and calculate the velocity of rotation of rotating shaft 402 according to the number of the peak-peak of time per unit acquisition.
Secondly, control circuit is determined the absolute angle of rotating shaft according to pulse strength.In the present embodiment, the output of sensor 440 is stepped according to the shape of scrambler 430.Control circuit stores the absolute angle and the detected value of multiple shape interrelatedly.Then, control circuit is judged the angle that rotating shaft is provided with the place according to detected value.Like this, the detection of rotating shaft 402 absolute angle can be in angle-resolved range Theta 0Within make.
As mentioned above, according to present embodiment, scrambler 430 and sensor 440 are disposed radially opposite each otherly.Secondly, form sensor counter surface 430a on the scrambler 430, so that increase monotonously with the distance of sensor 440 or reduce.Sensor 440 is by utilizing light or hyperacoustic displacement transducer.Sensor 440 outputs to control circuit to output signal according to the distance with sensor counter surface 430a.Control circuit is analyzed this output signal to detect speed, direction and the angle that rotating shaft 402 is rotated.Therefore, single sensor 440 can be in order to detect speed, direction and the angle that rotating shaft 402 is rotated simultaneously, make it to present with first embodiment in identical effectiveness.
In the present embodiment, sensor 440 is to utilize light or hyperacoustic displacement transducer.But, sensor 440 is specifically not limited, if it be can survey sensor counter surface 430a and sensor 440 between a kind of sensor of variable in distance.As sensor 440, for instance, can advise magnetic sensor, utilize interactional sensor between magnetic field and the eddy current, perhaps similar sensor at this.Under the situation of the sensor that utilizes eddy current, scrambler need be such as the such ferromagnetic material of metal material.
The bearing that secondly, can be used for first to the tenth embodiment described a kind of belt sensor among any one as the rotation detecting device among the present embodiment.
(the 20 embodiment)
Below with reference to Figure 34 the realization 20th embodiment of the present invention is described.At this, will be given identical Reference numeral and symbol with identical member mentioned among the 16 to 19 embodiment and will omit its explanation.
In the present embodiment, in Figure 31, radially be disposed radially scrambler on the side at scrambler holding part 411.On the other hand, on a radially side of sensor card gripping member 441, single sensor 445 is set.Sensor 445 is disposed radially to such an extent that be opposite to scrambler 435.
Figure 34 is the local enlarged perspective of scrambler 435, and this scrambler is used in according among a kind of rotation detecting device of realizing the 20th embodiment of the present invention.In the present embodiment, scrambler 435 is similar to scrambler 430 and is located opposite to sensor 445.
Scrambler 435 has annular shape, and axial width is constant.Scrambler 435 has scrambler fabricated section earthed surface 435b, and this surface 435b is apart from ring heart O radius R 2, and has a plurality of sensor counter surface 435a, and it is radius R 1 place that this surface 435a is arranged on apart from the ring heart, and radius R 1 is every predetermined angle θ 0 Change once.Scrambler 435 is fixed in scrambler fabricated section 431 at scrambler fabricated section earthed surface 435b place.The normal direction traversed by of scrambler fabricated section earthed surface 435b is axial.
Shown among Figure 34, a plurality of sensor counter surface 435a by step with scrambler 435 radial height r1 along circumferentially spaced.With O is that the center is every central angle θ 0Make step, so that the sensor counter surface of scrambler 435 is every angle θ 0Along circumferentially being cut apart.Therefore, from the center of scrambler 435 to the sensor counter surface 435a of scrambler 435 every angle θ 0Increase r1.
Therefore, the radius R 1 of scrambler 435 is from the sensor counter surface 435a with least radius R1 as reference, to the sensor counter surface 435a with maximum radius R1, every angle θ 0Increase r1 monotonously.In the present embodiment, by sensor counter surface 435a, the sensor counter surface 435a with maximum radius R1 is set with least radius R1.Secondly, in the present embodiment, scrambler 435 is provided with following configuration, promptly radius R 1 vertically (arrow A among Figure 31) it seems and increase gradually in the clockwise direction.Therefore, the distance between scrambler 435 and the sensor 445 is along with the rotation of rotating shaft 402 change of shape according to sensor counter surface 435a.Distance between scrambler 435 and the sensor 445 is stored among the unillustrated in the drawings control circuit according to angle.Moreover control circuit interrelatedly can store the position of a plurality of sensor counter surface 435a and the absolute angle of rotating shaft 402.
The sensor counter surface 435a of scrambler 435 is furnished with the N utmost point 437 separately.Each magnetized area that constitutes the N utmost point 437 has predetermined magnetic flux density separately.The N utmost point 437 forms magnetic field around self, and the intensity that this magnetic field has is corresponding to its polarity and magnetic flux density.Therefore, around the magnetic field of scrambler 435 formation corresponding to the magnetic flux density of the N utmost point 437.
Sensor 445 is disposed radially to such an extent that be opposite to the sensor counter surface 435a of scrambler 435.Sensor 445 is a kind of displacement transducers, can measure the sensor counter surface 435a of scrambler 435 and the variable in distance between the sensor 440.As an example, The present invention be directed to use can detect magnetic field sensor such as the Hall element and the coil, particularly Hall element in magnetic field and illustrated.Hall element is to produce the device of electric current as output signal according to the intensity of the magnetic flux of traversed by Hall element and direction.
But the magnetic field that sensor 445 sensings are formed by scrambler 435 each N utmost points 437.The intensity in the magnetic field that is formed by the N utmost point 437 is reducing or increase and increase or reduce along with distance between the sensor counter surface 435a of the N utmost point 437 and scrambler 435 respectively.But the variation of sensor 445 sensing magnetic field intensitys is also exported detected values via cable 422 and is given unillustrated control circuit among the figure.
The figure of detected value is represented by the solid line among Figure 27, as among the 17 embodiment.The size of output signal is proportional to the symbol of the intensity output signal in magnetic field and is then determined by the direction of magnetic flux.At this, appear at the pulse that detected value when the sensor counter surface 435a with least radius R1 is located opposite to sensor 445 is represented in the pulse on the high order end among Figure 27.Figure 37 shows that the absolute value of peak value of pulse intensity increases gradually with step-wise manner in time.
As previously mentioned, in the present embodiment, scrambler 435 is provided with following configuration, and (arrow A among Figure 31) it seems that radius R 1 increases in the clockwise direction gradually vertically promptly.Therefore, under the situation of Figure 27, control circuit is judged, scrambler 435, that is rotating shaft 402, and it seems that (arrow A among Figure 31) rotate on counter-clockwise direction vertically.
As shown in figure 37, the feasible signal that is reflected by the sensor counter surface 435 of the most close sensor 445 settings of the output of sensor 445 is as peak-peak.The control circuit number goes out the quantity of this peak value, and the quantity of the peak-peak that obtains according to time per unit is calculated the velocity of rotation of rotating shaft 402.
Secondly, control circuit can be determined the absolute angle of rotating shaft 402 according to pulse strength.Under the situation of present embodiment, the output of the pulse of sensor 445 is stepped according to the shape of scrambler 435 basically.Control circuit stores the absolute angle and the detected value of different shape interrelatedly.Then, control circuit is judged the angle that rotating shaft is provided with the place according to detected value.Like this, the detection of rotating shaft 402 absolute angle can be in angle-resolved range Theta 0Within make.
As mentioned above, according to present embodiment, scrambler 435 and sensor 445 are disposed radially opposite each otherly.Secondly, form sensor counter surface 435a on the scrambler 435, so that increase monotonously with the distance of sensor 445 or reduce.Sensor 445 outputs to control circuit to output signal according to the distance with sensor counter surface 435a.Control circuit is analyzed this output signal to detect speed, direction and the angle that rotating shaft 402 is rotated.Therefore, single sensor 445 can be in order to detect speed, direction and the angle that rotating shaft 402 is rotated simultaneously, make it to present with first embodiment in identical effectiveness.
In the present embodiment, owing to sensor counter surface 435a is made of each N utmost point, so detected peak value like this is mild.Therefore, compare with the situation of having only a peak value, the percent that peak value detects the error appearance has reduced, and makes it and may come detection peak with higher reliability.
Though the present invention is described with reference to a sensor counter surface situation about being made of the N utmost point of scrambler 435, the sensor counter surface of scrambler 435 also can be made of the S utmost point.In the case, the detection of velocity of rotation, rotation direction and absolute angle be with present embodiment in identical mode make, exception be output signal symbol conversely.
The bearing that secondly, can be used for first to the tenth embodiment described a kind of belt sensor among any one as the rotation detecting device among the present embodiment.
(the 21 embodiment)
Below with reference to Figure 35 the realization 21st embodiment of the present invention is described.This with the 16 to the 20 embodiment in mentioned identical member will be given identical Reference numeral and symbol, and its explanation will be omitted.
In the present embodiment, in Figure 31, on a radially side of scrambler holding part 431, scrambler 436 is set.On the other hand, on an axial side of sensor card gripping member 441, single-sensor 445 is set.Sensor 445 is disposed radially to such an extent that be opposite to scrambler 436.
Figure 35 is used in according to local enlarged perspective among a kind of rotation detecting device of realizing the 21st embodiment of the present invention, scrambler.In the present embodiment, scrambler 436 is similar to scrambler 430 or 435 and is located opposite to sensor 445.
Scrambler 436 has annular, and radial width is constant.Scrambler 436 has a scrambler fabricated section earthed surface 436b, this surface lies ring heart O radius R 2; And having a plurality of sensor counter surface 436a, it is radius R 1 position that this surface is arranged on apart from ring heart O, and radius R 1 is every predetermined angle θ 0 Change once.Scrambler 436 is fixed in scrambler fabricated section 431 at scrambler fabricated section earthed surface 436b place.The normal direction of scrambler fabricated section earthed surface 436b is with axially identical.
Shown among Figure 35, a plurality of sensor counter surface 436a by step with axial height r1 along circumferentially spaced.With O is that the center is every central angle θ 0Form step, so that every central angle θ 0Along the sensor counter surface of circumferentially having cut apart scrambler.Therefore, from the center of scrambler 436 to the radius R 1 of the sensor counter surface 436a of scrambler 436 every central angle θ 0Increase r1.
Therefore, the radius R 1 of scrambler 436 starts from the sensor counter surface 436a with least radius R1 as reference to the sensor counter surface 436a with maximum radius R1, every central angle θ 0Increase r1 gradually.In the present embodiment, be provided with sensor counter surface 436a by sensor counter surface 436a with maximum radius R1 with least radius R1.Secondly, in the present embodiment, scrambler 436 is provided with following configuration, promptly radius R 1 in the axial direction (arrow A among Figure 31) it seems and increase r1 in the clockwise direction gradually.Therefore, the distance between scrambler 436 and the sensor 445 along with the rotation of rotating shaft 402 according to the change of shape of sensor counter surface 436a.
Distance between scrambler 436 and the sensor 445 is stored among the unillustrated in the drawings control circuit by angle.Moreover control circuit can store the position of a plurality of sensor counter surface 436a and the absolute angle of rotating shaft 402 interrelatedly.
The a plurality of N utmost point 437 and S utmost points of alternately arranging 438 are set on the sensor counter surface 436a of scrambler 436.Each magnetized area that constitutes the N utmost point 437 and the S utmost point 438 has predetermined magnetic flux density separately, and the N utmost point 437 and the S utmost point 438 form magnetic field around self, and the intensity that this magnetic field has is corresponding to its polarity and magnetic flux density.Therefore, around the magnetic field of scrambler 436 formation corresponding to the magnetic flux density of the N utmost point 437 and the S utmost point 438.
Sensor 445 is a kind of magnetic sensors that can detect magnetic field, as Hall element and the coil of explaining in the 20 embodiment.
But the magnetic field that sensor 445 sensings are formed by each the N utmost point 437 and the S utmost point 438 of scrambler 436.The absolute value of the intensity in the magnetic field that is formed by the N utmost point 437 and the S utmost point 438 is respectively along with reducing or increase and increase or reduce apart from it between sensor counter surface 436a of the N utmost point 437 and the S utmost point 438 and scrambler 436.But the Strength Changes in sensor 445 sensing magnetic fields is also exported detected values via cable 422 and is given unillustrated control circuit among the figure.
By sensor 445 detected output signals be shown in Figure 30 among identical.At this, appear at the pulse that detected value when the sensor counter surface 436a with least radius R1 is located opposite to sensor 445 is represented in the pulse on the high order end among Figure 27.Figure 30 shows that the symbol of peak value of pulse depends on the difference of polarity and reverses, and the absolute value of peak value of pulse intensity increases in time.So under the situation of Figure 30, control circuit can be judged, rotating shaft 402 is rotated on the augment direction of the N utmost point 437 or the S utmost point 438 intensity, that is it seems that (arrow A among Figure 31) rotate on counter-clockwise direction vertically.Then, the control circuit number goes out the detected peak value number of time per unit, and calculates the velocity of rotation of rotating shaft 402.
Secondly, control circuit can be determined the absolute angle of rotating shaft 402 according to pulse strength.Control circuit can be as calculating absolute angle according to equation on above-mentioned 2 among the 18 embodiment.
Control circuit can store the position of a plurality of sensor counter surfaces and the absolute angle of rotating shaft 402 interrelatedly.Therefore, control circuit can be calculated the absolute angle of scrambler 436 by equation 2 result calculated as above-mentioned reference.
As mentioned above, according to present embodiment, scrambler 436 and sensor 445 are disposed radially opposite each otherly.Secondly, scrambler 436 has the sensor counter surface 436a that makes thereon, so that increases monotonously with the distance of sensor 445 or reduce.Sensor 445 can be according to coming output signal output to give control circuit with the distance of sensor counter surface 436a.Control circuit is analyzed this output signal to detect speed, direction and the angle that rotating shaft 402 is rotated.Therefore, single sensor 445 can in order to detect speed, direction and the angle that rotating shaft 402 is rotated simultaneously, make may present with the 11 embodiment in identical effectiveness.
In the present embodiment, used scrambler 436 with the sensor counter surface that constitutes by each N utmost point and each S utmost point.Therefore, detected peak value is high point.Make may be as among the 18 embodiment with high angular resolution detection absolute angle very.
The bearing that secondly, can be used for first to the tenth any one illustrated a kind of belt sensor of embodiment with rotation detecting device identical in the present embodiment.
(the 22 embodiment)
Realize the 22nd embodiment of the present invention below in conjunction with Figure 36 to 38 explanation.At this, will be given identical Reference numeral and symbol with identical member mentioned among the 16 to the 20 embodiment and its explanation will be omitted.
Figure 36 is that diagram realizes the scrambler 450 in the 22nd embodiment of the present invention.Scrambler 450 is in order to replace the scrambler 430 among Figure 31.The various structures that are different from scrambler 450 are as shown among Figure 31.
Figure 37 is the local enlarged perspective of scrambler 450.Scrambler 450 has annular shape, and axial width is constant.Scrambler 450 has scrambler fabricated section earthed surface 450b, and this surface lies ring heart is a radius R 2, and has the sensor counter surface, and this counter surface is arranged on apart from the position of ring heart radius R 1, and radius R 1 increases gradually or reduces.Scrambler 450 is fixed in scrambler fabricated section 431 at scrambler fabricated section earthed surface 450b place.The normal direction traversed by of scrambler fabricated section earthed surface 450b is axial.The sensor counter surface 450a of scrambler 450 is disposed radially to such an extent that to be opposite to be a kind of sensor 440 of displacement transducer.
Increase along with angle increases with predetermined ratio the radius R 1 of scrambler 450 from reference position along circumferencial direction.Radius R 1 maximum residing position and radius R 1 minimum residing position are separated by a step.In the present embodiment, scrambler is provided with following configuration, and promptly on axial (arrow A among Figure 31), radius R 1 increases in the clockwise direction gradually.Therefore, the distance between scrambler 450 and the sensor 440 is along with the rotation of rotating shaft 402 change of shape according to sensor counter surface 450a.Distance between scrambler 450 and the sensor 440 is stored among the unillustrated in the drawings control circuit according to angle.Moreover control circuit can store the position of a plurality of sensor counter surface 450a and the absolute angle of rotating shaft 402 interrelatedly.
Figure 38 is the sketch of diagram by sensor 440 detected output signals.Figure 38 shows the linear gradually in time increase of detected signal.
As previously mentioned, in the present embodiment, scrambler 450 is provided with following configuration, and (arrow A among Figure 31) it seems vertically promptly, and radius R 1 increases in the clockwise direction gradually.Therefore, under the situation of Figure 38, control circuit is judged, scrambler 450, that is rotating shaft 402, and it seems that (arrow A among Figure 31) rotate on counter-clockwise direction vertically.
Secondly, time when reaching maximum and according to calculating velocity of rotation from a certain peak value to the required time of next peak value according to the circuit sampling peak value.
Secondly, control circuit can be determined the absolute angle of rotating shaft according to peak strength.Under the situation of present embodiment, control circuit also has predetermined angular and corresponding to the detected value form of this angle.Control circuit in contrast to detected output valve intensity to calculate the velocity of rotation of rotating shaft 402 with this form.
As mentioned above, according to the present invention, scrambler 450 and sensor 440 are disposed radially opposite each otherly.Secondly, scrambler 450 has the sensor counter surface of making thereon, so that increases gradually with the distance of sensor 440 or reduce.Sensor 440 according to the sensor counter surface give control circuit apart from output signal output.Control circuit is analyzed this output signal to detect speed, direction and the angle that rotating shaft 402 is rotated.Therefore, single sensor 440 can be in order to detect speed, direction and the angle that rotating shaft 402 is rotated simultaneously, make it to present with the 11 embodiment in identical effectiveness.
The bearing that secondly, can be used for first to the tenth embodiment illustrated a kind of belt sensor among any one with rotation detecting device identical in the present embodiment.
(the 23 embodiment)
Realize the 22nd embodiment of the present invention below in conjunction with Figure 39 to 40 explanation.At this, will be given identical Reference numeral and symbol with identical member mentioned among the 16 to the 22 embodiment and its explanation will be omitted.
Figure 39 is that diagram realizes the scrambler 455 in the 20th embodiment of the present invention.Scrambler 455 is in order to replace the scrambler 430 among Figure 31.The various structures that are different from scrambler 455 are as shown among Figure 31.
Scrambler 455 has annular shape, and axial width is constant.Scrambler 455 has scrambler fabricated section earthed surface 455b, and this surface lies ring heart is a radius R 2, and has sensor counter surface 455a, and this surface 455a is arranged on apart from ring heart O and increases gradually or the position of the radius R 1 that reduces.Scrambler 455 is fixed in scrambler fabricated section 431 at scrambler fabricated section earthed surface 455b place.The normal direction traversed by of scrambler fabricated section earthed surface 455b is axial.The sensor counter surface 455a of scrambler 455 is disposed radially to such an extent that to be opposite to be a kind of sensor 445 of magnetic sensor.
Increase along with angle increases with predetermined ratio the radius R 1 of scrambler 455 from reference position along circumferencial direction.Radius R 1 residing position and radius R 1 when maximum are separated by a step for a hour residing position.In the present embodiment, scrambler is provided with following configuration, and promptly on axial (arrow A among Figure 31), radius R 1 increases in the clockwise direction gradually.Therefore, the distance between scrambler 455 and the sensor 445 is along with the rotation of rotating shaft 402 change of shape according to sensor counter surface 450a.Distance between scrambler 455 and the sensor 445 is stored among the unillustrated in the drawings control circuit according to angle.Moreover control circuit can store the position of a plurality of sensor counter surface 455a and the absolute angle of rotating shaft 402 interrelatedly.
On the sensor counter surface 455a of scrambler 455, be provided with a plurality of N utmost points 437 of predetermined space alternate configurations and the S utmost point 438.Each magnetized area that constitutes the N utmost point 437 and the S utmost point 438 has predetermined magnetic flux intensity separately.The N utmost point 437 and the S utmost point 438 form magnetic field around self separately, and the intensity that this magnetic field has is corresponding to its polarity and magnetic flux intensity.Therefore, formed magnetic field around scrambler 455 corresponding to the magnetic flux of the N utmost point 437 and the S utmost point 438.
Figure 40 is the sketch of diagram by sensor 445 detected output signals.Figure 40 shows that the absolute value of peak value of pulse intensity increases in time gradually.
As previously mentioned, in the present embodiment, scrambler 455 is provided with following configuration, and (arrow A among Figure 31) it seems vertically promptly, and radius R 1 increases in the clockwise direction gradually.Therefore, under the situation of Figure 40, control circuit is judged, scrambler 455, that is rotating shaft 402, and it seems that (arrow A among Figure 31) rotate on counter-clockwise direction vertically.
Secondly, time when reaching maximum and according to calculating velocity of rotation from a certain peak value to the required time of next peak value according to the circuit sampling peak value.
Secondly, control circuit can be determined the absolute angle of rotating shaft according to detected signal.Under the situation of present embodiment, control circuit also has predetermined angular and corresponding to the detected value form of this angle.Control circuit in contrast to detected output valve intensity to calculate the velocity of rotation of rotating shaft 402 with this form.
As mentioned above, according to present embodiment, scrambler 455 and sensor 445 are disposed radially opposite each otherly.Secondly, scrambler 455 has the sensor counter surface 455a that makes thereon, so that increases gradually with the distance of sensor 445 or reduce.Sensor 445 according to sensor counter surface 455a give control circuit apart from output signal output.Control circuit is analyzed this output signal to detect speed, direction and the angle that rotating shaft 402 is rotated.Therefore, single sensor 445 can be in order to detect speed, direction and the angle that rotating shaft 402 is rotated simultaneously, make it to present with the 11 embodiment in identical effectiveness.
The bearing that secondly, can be used for first to the tenth any one illustrated a kind of belt sensor of embodiment with rotation detecting device identical in the present embodiment.
(the 24 embodiment)
Realize the 24th embodiment of the present invention below in conjunction with Figure 41 to 42 explanation.At this, will be given identical Reference numeral and symbol with identical member mentioned among the 16 to the 23 embodiment and its explanation will be omitted.
Figure 41 is that diagram realizes the scrambler 460 in the 24th embodiment of the present invention.Scrambler 460 is in order to replace the scrambler 410 among Figure 24.The various structures that are different from scrambler 450 are as shown among Figure 24.
Figure 42 is the local enlarged perspective of scrambler 460.Scrambler 460 has annular shape, and axial width is constant.Scrambler 460 has straight scrambler fabricated section earthed surface 460b, and sensor counter surface 460a, and this surface 460a increases from scrambler fabricated section thickness L with predetermined ratio.Scrambler 460 is fixed in scrambler fabricated section 411 at scrambler fabricated section earthed surface 460b place.The normal direction of scrambler fabricated section earthed surface 460b is parallel to axially.It is a kind of sensor 420 of displacement transducer that the sensor counter surface 460a of scrambler 460 is located opposite to vertically.
Increase along with angle increases with predetermined ratio the thickness L of scrambler 460 from reference position along circumferencial direction.Thickness L residing position and thickness L when maximum are separated by a step for a hour residing position.In the present embodiment, scrambler is provided with following configuration, promptly it seems from sensor, and thickness L increases in counter-clockwise direction.Therefore, the distance between scrambler 460 and the sensor 420 is along with the rotation of rotating shaft 402 change of shape according to sensor counter surface 460a.Distance between scrambler 460 and the sensor 420 is stored among the unillustrated in the drawings control circuit according to angle.Moreover control circuit can store the position of a plurality of sensor counter surface 460a and the absolute angle of rotating shaft 402 interrelatedly.
By sensor 420 detected output signals as shown among Figure 38.The computing method of velocity of rotation, rotation direction and absolute angle are as explaining among the 22 embodiment.
As previously mentioned, in the present embodiment, scrambler 460 disposes axially opposedly each other with sensor 420.Secondly, scrambler 460 has the sensor counter surface 460a that makes thereon, so that increases gradually with the distance of sensor 420 or reduce.Sensor 420 according to sensor counter surface 460a give control circuit apart from output signal output.Control circuit is analyzed output signal to detect speed, direction and the angle that rotating shaft 402 is rotated.Therefore, single sensor 420 can be in order to detect speed, direction and the angle that rotating shaft 402 is rotated simultaneously.Make it to present with the 11 embodiment in identical effectiveness.
(the 25 embodiment)
Below in conjunction with Figure 43 the realization 25th embodiment of the present invention is described.At this, will be given identical Reference numeral and symbol with identical member mentioned among the 16 to the 23 embodiment and its explanation will be omitted.
Figure 43 is the local enlarged perspective that diagram realizes the scrambler 465 in the 25th embodiment of the present invention.Scrambler 465 is in order to replace the scrambler 410 among Figure 24.The various structures that are different from scrambler 465 are as shown among Figure 24.
Scrambler 465 has annular shape, and axial width is constant.Scrambler 465 has straight scrambler fabricated section earthed surface 465b and sensor counter surface 465a, and the latter increases from scrambler fabricated section thickness L with predetermined ratio.Scrambler 465 is fixed in scrambler fabricated section 411 at scrambler fabricated section earthed surface 465b place.The normal direction of scrambler fabricated section earthed surface 465b is parallel to axially.It is a kind of sensor 425 of magnetic sensor that the sensor counter surface 465a of scrambler 463 is located opposite to vertically.
Increase along with angle increases with predetermined ratio the thickness L of scrambler 465 from reference position along circumferencial direction.Thickness L residing position and thickness L when maximum are separated by a step for a hour residing position.In the present embodiment, scrambler is provided with following configuration, promptly it seems from sensor, and thickness L increases on counter-clockwise direction gradually.Therefore, the distance between scrambler 465 and the sensor 425 is along with the rotation of rotating shaft 402 change of shape according to sensor counter surface 465a.Distance between scrambler 465 and the sensor 425 is stored among the unillustrated in the drawings control circuit according to angle.Moreover control circuit can store the position of a plurality of sensor counter surface 465a and the absolute angle of rotating shaft 402 interrelatedly.
The a plurality of N utmost points 437 and the S utmost point 438 of alternate configurations are set with predetermined spacing on the sensor counter surface 465a of scrambler 465.Each magnetized area that constitutes the N utmost point 437 and the S utmost point 438 has predetermined magnetic flux density separately.The N utmost point 437 and the S utmost point 438 form magnetic field around self separately, and the intensity that this magnetic field has is corresponding to its polarity and magnetic flux density.Therefore, formed magnetic field around scrambler 465 corresponding to the N utmost point 437 and the S utmost point 438 magnetic flux densities.
The output signal of being controlled out by sensor 425 is as shown among Figure 40.The computing method of velocity of rotation, rotation direction and absolute angle are as explaining among the 23 embodiment.
As mentioned above, according to the present invention, scrambler 465 and sensor 425 are provided with opposite each otherly vertically.Secondly, scrambler 465 has the sensor counter surface 465a that makes thereon, so that increases gradually with the distance of sensor 425 or reduce.Sensor 425 according to sensor counter surface 465a give control circuit apart from output signal output.Control circuit is analyzed this output signal to detect speed, direction and the angle that rotating shaft 402 is rotated.Therefore, single sensor 425 can be in order to detect speed, direction and the angle that rotating shaft 402 is rotated simultaneously, make it to present with the 11 embodiment in identical effectiveness.
(the 26 embodiment)
Below with reference to Figure 44 the realization 26th embodiment of the present invention is described.At this, will be given identical Reference numeral and symbol with the identical member of mentioning among the 16 to the 25 embodiment and will omit its explanation.
Figure 44 diagram wherein is equipped with according to the rotation detecting device of realizing the 26th embodiment of the present invention as a kind of deep groove ball bearing of belt sensor rolling bearing.In the present embodiment, the outer ring 403 of deep groove ball bearing and inner ring 404 have sensor mounting portion 403d and the scrambler mounting portion 404c that stretches vertically respectively.
On the 404d of the outside vertically of scrambler mounting portion 404c, scrambler 470 is set.Scrambler 470 is a kind of scramblers that magnet is set on it, such as illustrated scrambler 435,436 and 455 among the 20, the 21 and the 23 embodiment.An axial side of scrambler 470 is opposite to sensor mounting portion 403d.
On the other hand, on the inboard 403e of the axle end of sensor mounting portion 403d, annular steel disc 495 is set uprightly.Lip ring 380 is supported with the gap between seal sensor mounting portion 403d and the scrambler mounting portion 404c by steel disc 495.
Secondly, on the axial inboard 403e of sensor mounting portion 403d, sensor mount 486 is set.Sensor mount 486 is between sealing ring 408 and seal 490.
Temperature measuring equipment 485 and sensor 480 are set on sensor mount 486.Sensor 480 is a kind of magnetic sensors, and it can measure the variation in the magnetic field that is formed by scrambler 470, or a kind of displacement transducer, the variation of its decidable distance.Sensor 480 is located opposite to scrambler 470 and can measures the shape of scrambler 470.Sensor 480 with the 20, the 21 and the 23 embodiment in identical mode detect velocity of rotation, rotation direction and the absolute angle of rotor.
But the temperature data that the temperature of temperature measuring equipment 485 determination sensors and scrambler and each surrounding member and output so record is given unillustrated control circuit among the figure.Given under the magnetized situation by the N utmost point or the S utmost point at scrambler 470, each magnetized area that constitutes the N utmost point and the S utmost point varies with temperature and changes magnetic flux density.Control circuit has a form, changes so as to proofreading and correct temperature variant magnetic flux density.Secondly, control circuit utilizes this form to proofread and correct detected for this reason output valve and detects velocity of rotation, rotation direction and the absolute angle of rotating shaft.Under the situation of using such contact-type thermometer such as thermopair, can detect temperature such as the so nonrotational part of sensor, but under the situation of using such non-contact thermometer such as infrared radiation thermometer, the just feasible temperature that may detect such as the such tumbler of scrambler.
As mentioned above, according to present embodiment, proofreading and correct the output valve that gets according to temperature variation can be in order to detect spindle speed, rotation direction and the absolute angle of rotating shaft.Therefore, scrambler 470 is adopted to scrambler 470 various operational temperature conditions without a moment's thought, is worth more broadly being applied to bearing and tourelle to this rotary state detecting device.
Chipware gap between scrambler and the sensor is with expanding with heat and contract with cold and change.This core body gap changes and can be proofreaied and correct according to the signal from temperature measuring equipment.
Secondly, in the present embodiment, scrambler 470 and sensor 480 are sealed by sealing ring 408 and seal 480.Therefore, can make the ectocine minimum, can measure with high precision more.
Therefore, speed, direction and angle that rotating shaft is rotated can be detected by simple structure, make it to reduce number of components and parts and therefore reduce the parts cost.Secondly, reduce number of components and parts and can improve assembling, make it also can reduce assembly cost.
Secondly, owing to only need a sensor,, in a word make the lighter possibility that is designed to so can save the space in the bearing.Moreover the minimizing of number of sensors also causes the weight of bearing to reduce, if bearing is used for automobile etc., this helps to reduce fuel consume.
Any one illustrated belt sensor bearing that secondly, can be used for first to the tenth embodiment with rotation detecting device identical in the present embodiment.
Industrial applicability
According to the present invention, a kind of rolling bearing of belt sensor can be provided, even acting on any load that pushes the seat ring end surface thereon, also can keep the high accuracy that detects.
Secondly, according to the present invention, can provide a kind of rolling bearing of belt sensor, a plurality of sensors can be housed therein and can reduce width.
Moreover, according to the present invention, can provide a kind of rolling bearing of belt sensor, can stop such as the such high accuracy of external disturbance to keep detecting of magnetic flux bleed-through.
Secondly, according to the present invention, because encoder is different with the position from the sensor counter surface, so the rolling bearing of a kind of rotary state detecting device and a kind of belt sensor can be provided, measure with the distance of encoder with simple structural determination velocity of rotation, rotation direction and absolute angle by making sensor. Moreover, in the situation of this structure, only need a sensor, make it and may also therefore reduce installation cost by simplified structure.
Secondly, according to the present invention, a kind of rotary state detecting device and a kind of rolling bearing with driver can be provided, it can be by detecting the velocity of rotation of tumbler with single sensor detection peak, this is to have each different magnetic flux densities owing to consist of a plurality of magnetized areas of encoder. Moreover, have by prior grasp each different magnetic flux each magnetized area figure is set, use single sensor can detect rotation direction and the absolute angle of tumbler simultaneously. Thereby, by use than in the relevant technology comparatively simply structure can be implemented in and reduce the space on the static element. Secondly, do not need to arrange some extra sensors, just so that may detect tumbler with low cost.

Claims (6)

1. the rolling bearing of a belt sensor comprises:
Inner ring;
The outer ring;
Rolling member rollably is arranged between inner ring and the outer ring;
Sensor, its be arranged on inner ring and outer ring the two one of on;
Detection piece, it is arranged on inner ring and outer ring in the two on another, and diametrically contraposition is suitable for giving sensing by sensor in sensor; And
Noise isolation, it is arranged near sensor and the detection piece; And
Described noise isolation is made by magnetic material;
The rolling bearing of described belt sensor also comprises:
First holding part, it is made by magnetic material, is fixed on the outer ring, can hold sensor and detection piece the two one of; And
Second holding part, it is made by magnetic material, is fixed on the inner ring, can hold sensor and detection piece in the two another;
Wherein first holding part and second holding part play the effect of noise isolation.
2. the rolling bearing of belt sensor as claimed in claim 1, wherein sensor is a magnetic sensor, but the magnetic that its sensing is produced by detection piece.
3. the rolling bearing of belt sensor as claimed in claim 1, wherein at least one has a sidewall in first holding part and second holding part, and this sidewall is opposite at sensor and detection piece on the side of rolling member and radially extends; And
First holding part and the second holding part covering sensor and detection piece and have a U-shaped cross-section.
4. as the rolling bearing of claim 1 or 3 described belt sensors, also comprise a sidewall placed in the middle, it is disposed radially to such an extent that stretch to rolling member one side of sensor and detection piece;
Sidewall wherein placed in the middle plays the effect of noise isolation.
5. as the rolling bearing of each described belt sensor in the claim 1 to 3, wherein first holding part and second holding part can hold sensor and detection piece, and sensor and detection piece are radially opposite each other.
6. the rolling bearing of belt sensor as claimed in claim 4, wherein first holding part and second holding part can hold sensor and detection piece, and sensor and detection piece are radially opposite each other.
CN2007101383595A 2001-11-22 2002-11-18 Rolling bearing with sensor Expired - Fee Related CN101105203B (en)

Applications Claiming Priority (10)

Application Number Priority Date Filing Date Title
JP357696/01 2001-11-22
JP2001357696A JP4250890B2 (en) 2001-11-22 2001-11-22 Rolling bearing with sensor
JP396916/01 2001-12-27
JP2001396916A JP2003194048A (en) 2001-12-27 2001-12-27 Rolling bearing with sensor
JP022105/02 2002-01-30
JP2002022105A JP4174652B2 (en) 2002-01-30 2002-01-30 Rolling bearing with sensor
JP156097/02 2002-05-29
JP2002156097 2002-05-29
JP156098/02 2002-05-29
JP2002156098A JP2003344101A (en) 2002-05-29 2002-05-29 Rotating condition detector and rotator

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CNB028271289A Division CN100436847C (en) 2001-11-22 2002-11-18 Sensor-equipped rolling bearing, and rotation state detecting device

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Publication Number Publication Date
CN101105203A CN101105203A (en) 2008-01-16
CN101105203B true CN101105203B (en) 2010-09-01

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CN 200710138361 Pending CN101092994A (en) 2001-11-22 2002-11-18 Sensor-equipped rolling bearing, and rotation state detecting device
CNA2007101383580A Pending CN101096979A (en) 2001-11-22 2002-11-18 Sensor-equipped rolling bearing
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CNA2007101383580A Pending CN101096979A (en) 2001-11-22 2002-11-18 Sensor-equipped rolling bearing

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Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2454558B1 (en) * 2009-07-15 2013-04-10 Skf Bv Hall-effect sensor arrangement
US8229682B2 (en) * 2009-08-17 2012-07-24 General Electric Company Apparatus and method for bearing condition monitoring
JP5540728B2 (en) * 2010-01-25 2014-07-02 株式会社ジェイテクト Roller bearing device
CN102072259A (en) * 2011-01-24 2011-05-25 南京工大数控科技有限公司 Intelligent slewing bearing with implanted sensors
WO2015090479A1 (en) 2013-12-20 2015-06-25 Aktiebolaget Skf Load determining system for a rolling element bearing
US9863788B2 (en) 2014-09-10 2018-01-09 Infineon Technologies Ag Linear position and rotary position magnetic sensors, systems, and methods
US9746346B2 (en) 2014-09-10 2017-08-29 Infineon Technologies Ag Linear position and rotary position magnetic sensors, systems, and methods
GB201506138D0 (en) * 2015-04-10 2015-05-27 Skf Ab Capped bearing with vibration sensor
CN105203196A (en) * 2015-09-09 2015-12-30 徐州徐工筑路机械有限公司 Stabilized soil mixing plant station aggregate belt weigher belt slip detection method and alarm device thereof
DE102017103414B3 (en) * 2017-02-20 2018-02-15 Schaeffler Technologies AG & Co. KG Resolverlageranordnung
CN107387551A (en) * 2017-07-05 2017-11-24 如皋市非标轴承有限公司 A kind of intelligence dress replacement bearing
JP7340525B2 (en) * 2017-09-29 2023-09-07 ヘラ ゲーエムベーハー ウント コー．カーゲーアーアー A bearing including an inner ring, an outer ring, and a sensor, and a system including such a bearing.
CN108286926B (en) * 2017-12-28 2020-02-21 洛阳轴承研究所有限公司 Online measuring device and method for end face flange of retainer
WO2022127973A1 (en) * 2020-12-15 2022-06-23 Schaeffler Technologies AG & Co. KG Sensor bearing having a shield ring
CN113063594B (en) * 2021-03-23 2022-04-19 重庆大学 Acoustic intelligent bearing and monitoring and diagnosing method thereof
CN114113666A (en) * 2021-10-14 2022-03-01 人本股份有限公司 Multistage magnetic ring structure of double-wheel-speed sensor of hub bearing

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5026178A (en) * 1989-05-05 1991-06-25 Gmn Georg Miller Nurnberg Ag Aktiengesellschaft Sensor bearings for determining rotational speed and/or angle of torsion
CN1018766B (en) * 1990-02-22 1992-10-21 托林顿公司 Apparatus for sensing directin and speed of steering wheel shaft
CN1021663C (en) * 1989-10-16 1993-07-21 托林顿公司 Antifriction bearing assembly with speed sensor
EP0511106B1 (en) * 1991-04-24 1995-01-04 Jaeger Improved rollbearing with incorporated speed sensor
CN1122003A (en) * 1994-03-08 1996-05-08 Snr轴承公司 Device for sensing the speed of rotation of a rolling bearing
US6209389B1 (en) * 1995-01-23 2001-04-03 Nsk Ltd. Rolling bearing unit with rotating speed detector

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5026178A (en) * 1989-05-05 1991-06-25 Gmn Georg Miller Nurnberg Ag Aktiengesellschaft Sensor bearings for determining rotational speed and/or angle of torsion
CN1021663C (en) * 1989-10-16 1993-07-21 托林顿公司 Antifriction bearing assembly with speed sensor
CN1018766B (en) * 1990-02-22 1992-10-21 托林顿公司 Apparatus for sensing directin and speed of steering wheel shaft
EP0511106B1 (en) * 1991-04-24 1995-01-04 Jaeger Improved rollbearing with incorporated speed sensor
CN1122003A (en) * 1994-03-08 1996-05-08 Snr轴承公司 Device for sensing the speed of rotation of a rolling bearing
US6209389B1 (en) * 1995-01-23 2001-04-03 Nsk Ltd. Rolling bearing unit with rotating speed detector

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EP 0511106 B1,说明书第2栏第2行至第3栏第48行,第6栏第38行至第8栏第47行、附图2.

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JP4250890B2 (en) 2009-04-08
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CN101092994A (en) 2007-12-26
JP2003156060A (en) 2003-05-30
CN101105203A (en) 2008-01-16

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