GB2237391A - Pulse ring for rotation speed sensor - Google Patents

Pulse ring for rotation speed sensor Download PDF

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Publication number
GB2237391A
GB2237391A GB9022955A GB9022955A GB2237391A GB 2237391 A GB2237391 A GB 2237391A GB 9022955 A GB9022955 A GB 9022955A GB 9022955 A GB9022955 A GB 9022955A GB 2237391 A GB2237391 A GB 2237391A
Authority
GB
United Kingdom
Prior art keywords
pulse ring
ring
cylindrical portion
teeth
annular portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9022955A
Other versions
GB9022955D0 (en
GB2237391B (en
Inventor
Ikuo Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Original Assignee
NTN Corp
NTN Toyo Bearing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Publication of GB9022955D0 publication Critical patent/GB9022955D0/en
Publication of GB2237391A publication Critical patent/GB2237391A/en
Application granted granted Critical
Publication of GB2237391B publication Critical patent/GB2237391B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/488—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

The pulse ring has an annular portion (2) and a cylindrical portion 4 integrally formed along the outer edge of the annular portion and extending axially at a right angle thereto. The cylindrical portion has a toothed portion made up of alternating teeth 5 and recesses 6 and extending over the entire circumference thereof formed by pressing. A rib 8 of unpressed metal extends around the cylindrical portion along the edge which joins the annular portion. The rib serves to stiffen the ring. A boss portion 3 attached to the inner edge of the annular portion is used for mounting the pulse ring on a bearing. <IMAGE>

Description

PULSE RING This invention relates to a pulse ring mounted on a rotary member such as a vehicle wheel and used in combination with a magnetic sensor to detect the rotating speed of the rotary member.
A pulse ring is used to detect the number of revolutions of each of the front and rear wheels of a vehicle in order to control the vehicle with an anti-lock brake system (ALB). Such a pulse ring has to be light in weight, inexpensive and have a high detecting accuracy. The present applicant proposed in Japanese Utility Model Application 62-177927 a pulse ring made of steel plate and having a toothed portion formed by ironing.
This pulse ring is made by bending the circumferential edge of an annular plate toward one side at a right angle to form a cylindrical portion, and ironing the cylindrical portion to form a toothed portion having teeth and recesses alternating with each other.
With such a pulse ring made by ironing a steel plate, in order to improve the detecting accuracy, it is necessary that the recesses be sufficiently deep and the toothed portion have a high pitch accuracy. For this purpose, a considerable force has to be exerted for ironing.
But at the cylindrical portion made by bending a steel plate, there is a difference in stiffness and plastic deformability between its end continuous with the annular plate and its free end. Therefore, if the toothed portion is formed by ironing, the teeth tend to be formed so as to narrow toward the end continuous with the annular plate, so that their shape may change within the effective range for detection with a magnetic sensor. This will cause sagging of the output waveform of the magnetic sensor at their crests, thus lowering the detecting accuracy.
Further, since a pulse ring is exposed to the atmosphere when mounted on a bearing unit of a vehicle wheel, it is required to have a high stiffness to assure high shock resistance. But a pulse ring having a toothed portion formed over the whole width of the cylindrical portion has a low stiffness at the end of the toothed portion. Thus, the toothed portion can be easily deformed or damaged by being hit by stones or the like. This will result in decrease in the detecting accuracy.
An object of the present invention is to provide, in order to solve the abovementioned problems, a pulse ring which has a toothed portion having a uniform shape over the entire width for better detecting accuracy and which has an excellent stiffness.
In accordance with the present invention, there is provided a pulse ring comprising an annular portion, a cylindrical portion integrally formed along the outer edge of the annular portion to extend toward one side of the annular portion at a right angle, the cylindrical portion being formed with a rib extending over the entire circumference thereof along the edge continuous with the annular portion and with a toothed portion comprising alternating teeth and recesses and extending over the entire circumference thereof, the toothed portion being formed by pressing.
The rib portion provided over the entire circumference of the cylindrical portion at the end continuous with the annular plate serves to increase the stiffness of the cylindrical portion formed with teeth. Further, since the toothed portion is formed by pressing, the teeth will be uniform in width over the entire length thereof. This leads to an improvement in the detecting accuracy.
Other features and objects of the present invention will become apparent from the following description taken with reference to the accompanying drawings, in which: Fig. 1 is a perspective view of the pulse ring according to this invention; Fig. 2 is a vertical sectional side view of the same; Fig. 3 is an enlarged front view of a portion of the same; and Fig. 4 is a vertical sectional view showing how it is used.
Now the embodiment of this invention will be described with reference to the accompanying drawings.
As shown in the drawings, a pulse ring 1 is made by pressing a steel plate. It has an annular plate 2, a boss portion 3 bent at a right angle from the annular plate toward one side, and a cylindrical portion 4 bent at a right angle toward the same side. The cylindrical portion 4 is formed over the entire circumference thereof with a toothed portion 7 comprising alternating teeth 5 and recesses 6.
The cylindrical portion 4 is further formed with a rib 8 extending over the entire circumference along the edge continuous with the annular plate 2.
The rib 8 forms a part of the cylindrical portion 4, the remaining part of which is the toothed portion 7. It should have a width equal to or greater than the thickness of the annular plate 2. The teeth 5 have their top surface flush with the outer peripheral surface of the rib 8.
By providing the cylindrical portion 4 with the rib 8 having a width equal to or greater than the thickness of the annular plate 2 and extending along the edge continuous with the annular plate 2, the toothed portion 7 can be formed on the cylindrical portion 4 by pressing.
Since the toothed portion 7 is formed by pressing, the teeth:5 can be formed in uniform straight shape over the entire width of the toothed portion 7. This serves to improve the accuracy in shape of the toothed portion 7 within the effective range for detection with a magnetic sensor.
In forming the toothed portion 7 by pressing, the recesses 6 are formed so that their depth will be larger than the wall thickness of the cylindrical portion 4, as shown in Fig. 3.
In order to increase the overall stiffness of the pulse ring 1, a shoulder portion 9 may be formed intermediately of the annular plate 2 as shown in Fig. 2.
As shown in Fig. 4, the pulse ring according to this invention is fixedly mounted on a hub unit bearing 11 for a wheel by press-fitting its boss portion 3 on the outer peripheral surface of an outer ring 12 of the bearing 11 at its end. An electromagnetic sensor 13 is mounted at such a position as to face the outer peripheral surface of the pulse ring 1.
The pulse ring 1 fixedly mounted on the outer ring 12 rotates together -with the outer ring, so that the sensor 13 can detect the number of revolutions by detecting the change in magnetic flux generated by the toothed portion 7 formed on the cylindrical portion 4.
High detecting accuracy and high stiffness are required for the pulse ring 1. Because the toothed portion 7 is formed by pressing, the teeth 5 have high shape and pitch accuracy and thus reveal high detecting accuracy. In order to prevent deterioration in detecting accuracy due to rust, the pulse ring 1 should be made of a corrosion resistant magnetic stainless steel plate or a steel plate having its surface subjected to anti-corrosion surface treatment.
Also, because the rib 8 is formed on the cylindrical portion 4 and the shoulder 9 is provided on the annular plate 2, the stiffness of the toothed portion 7 and that of the entire pulse ring will improve. The shock resistance will also improve. Thus high detecting accuracy can be maintained for a long time.

Claims (3)

WHAT IS CLAIMED IS
1. A pulse ring comprising an annular portion, a cylindrical portion integrally formed along the outer edge of said annular portion to extend toward one side of said annular portion at a right angle, said cylindrical portion being formed with a rib extending over the entire circumference thereof along the edge continuous with said annular portion and with a toothed portion comprising alternating teeth and recesses and extending over the entire circumference thereof, said toothed portion being formed by pressing.
2. A pulse ring of the kind which is made from pressing a steel member in order to form a plurality of teeth around its circumference, said teeth extending generally in an axial direction with regard to the pulse ring characterised in that the teeth do not extend the full width of the outer annular surface of the ring thereby leaving a continuous peripheral rib (8) to strengthen the pulse ring.
3. A pulse ring substantially is hereinbefore described with reference to and as shown in the accompanying drawings.
GB9022955A 1989-10-23 1990-10-22 Pulse ring Expired - Lifetime GB2237391B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1989124198U JPH0745014Y2 (en) 1989-10-23 1989-10-23 Pulse ring

Publications (3)

Publication Number Publication Date
GB9022955D0 GB9022955D0 (en) 1990-12-05
GB2237391A true GB2237391A (en) 1991-05-01
GB2237391B GB2237391B (en) 1994-07-20

Family

ID=14879416

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9022955A Expired - Lifetime GB2237391B (en) 1989-10-23 1990-10-22 Pulse ring

Country Status (3)

Country Link
JP (1) JPH0745014Y2 (en)
FR (1) FR2653551A1 (en)
GB (1) GB2237391B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0564685A1 (en) * 1992-04-10 1993-10-13 Dr. Johannes Heidenhain GmbH Support for a measuring scale
DE4311496A1 (en) * 1993-04-07 1994-10-13 Starkstrom Apparatebau Gmbh Manual angle encoder
GB2292781A (en) * 1994-08-30 1996-03-06 Ntn Toyo Bearing Co Ltd Cold forged pulsar ring
US5764051A (en) * 1993-08-31 1998-06-09 Ntn Corporation Cold forged toothed ring for producing rotational speed signals
EP0945729A1 (en) * 1998-03-27 1999-09-29 Volkswagen Aktiengesellschaft Toothed wheel for detecting angular position or speed of rotating shafts, and production method
US6498475B2 (en) * 2001-03-06 2002-12-24 Delphi Technologies, Inc. Performance sensor ring with reduced mass
ES2237981A1 (en) * 2002-11-25 2005-08-01 Precisgal Componentes, S.A. Method for manufacturing ring series for anti-lock brake system in vehicle, involves mounting hardened steel disks on transmission system of vehicle, and attaching detecting units with wheels
EP3012636A1 (en) * 2014-10-24 2016-04-27 Carl Freudenberg KG Encoder wheel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005010348A1 (en) * 2005-03-07 2006-09-14 Hansa Metallwerke Ag Sanitary fitting with a water outlet housing and a water supply

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0186668A1 (en) * 1984-06-27 1986-07-09 Motorola, Inc. Three word instruction pipeline
GB2221996A (en) * 1988-08-18 1990-02-21 Honda Motor Co Ltd Pulser ring

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7800451A (en) * 1977-02-03 1978-08-07 Ciba Geigy MIXTURE OF DI- OR TRITHIOPHOSPHORIC ACID DIESTERS, METHODS FOR PREPARATION AND USE THEREOF.
JPS61123970U (en) * 1985-01-22 1986-08-04
JPS63118511U (en) * 1987-01-23 1988-08-01
DE3703395A1 (en) * 1987-02-05 1988-08-18 Porsche Ag Rotor of a wheel speed sensor for antilocking systems of motor vehicles
JPH0181517U (en) * 1987-11-18 1989-05-31

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0186668A1 (en) * 1984-06-27 1986-07-09 Motorola, Inc. Three word instruction pipeline
GB2221996A (en) * 1988-08-18 1990-02-21 Honda Motor Co Ltd Pulser ring

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0564685A1 (en) * 1992-04-10 1993-10-13 Dr. Johannes Heidenhain GmbH Support for a measuring scale
DE4311496A1 (en) * 1993-04-07 1994-10-13 Starkstrom Apparatebau Gmbh Manual angle encoder
US5764051A (en) * 1993-08-31 1998-06-09 Ntn Corporation Cold forged toothed ring for producing rotational speed signals
GB2292781A (en) * 1994-08-30 1996-03-06 Ntn Toyo Bearing Co Ltd Cold forged pulsar ring
GB2292781B (en) * 1994-08-30 1998-02-04 Ntn Toyo Bearing Co Ltd Cold forged pulsar ring
EP0945729A1 (en) * 1998-03-27 1999-09-29 Volkswagen Aktiengesellschaft Toothed wheel for detecting angular position or speed of rotating shafts, and production method
US6498475B2 (en) * 2001-03-06 2002-12-24 Delphi Technologies, Inc. Performance sensor ring with reduced mass
ES2237981A1 (en) * 2002-11-25 2005-08-01 Precisgal Componentes, S.A. Method for manufacturing ring series for anti-lock brake system in vehicle, involves mounting hardened steel disks on transmission system of vehicle, and attaching detecting units with wheels
EP3012636A1 (en) * 2014-10-24 2016-04-27 Carl Freudenberg KG Encoder wheel
DE102014015673A1 (en) * 2014-10-24 2016-04-28 Carl Freudenberg Kg sensor wheel

Also Published As

Publication number Publication date
GB9022955D0 (en) 1990-12-05
JPH0363817U (en) 1991-06-21
JPH0745014Y2 (en) 1995-10-11
GB2237391B (en) 1994-07-20
FR2653551B1 (en) 1994-04-22
FR2653551A1 (en) 1991-04-26

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