JP4144627B2 - Wheel speed detection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact device for detecting wheel speed, capable of attaining small-footprint of a wheel and of enhancing workability. <P>SOLUTION: The present device for detecting wheel speed consists of a magnetic sensor 11 and a magnetic ring 9, such that they are both integrated inside a sealing device 5, while the magnetic ring 9 constitutes a part of the sealing device 5 (a cored bar 6). Accordingly, reduction in dimension, reduction in the number of components, small-footprint, and improvement of assembling workability can be made. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

Description

  The present invention relates to a wheel speed detecting device for detecting the rotational speed of a wheel used for an antilock brake of an automobile.

  Conventionally, this type of wheel speed detecting device includes a magnetic sensor fixed on the fixed side of the inner ring and the outer ring, and a magnetic ring on the rotating side arranged to face the magnetic sensor. Some have detected the rotational speed of a wheel by detecting the magnetic field which fluctuates with rotation of a ring with a magnetic sensor.

  By the way, conventionally, such a wheel speed detecting device has been arranged independently of a sealing device that seals the space between the inner ring and the outer ring to the outside, so that a dedicated space is required and compactness is required. In addition, there is a problem that workability at the time of assembling is not good because it is necessary to consider the positional relationship with other parts constituting the wheel.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a wheel speed detection device that can save space around the wheel, is compact, and can improve workability.

To achieve the above object, the wheel speed detecting apparatus of the present invention, the magnetic ring is fixed to the inner ring of the rotating side of the inner ring and the stationary side of the outer rotating side to rotate relative stationary to the stationary side of the outer ring In the wheel speed detection device that makes the magnetic sensor opposed to each other and detects the relative rotational speed between the outer ring and the inner ring with the magnetic sensor,
The magnetic ring and the magnetic sensor are integrated into a sealing device that seals a gap between the inner ring and the outer ring,
In the space where the rotating side member and the stationary side member of the sealing device are opposed, the magnetic body ring and the magnetic sensor are arranged so as to face each other in the radial direction ,
The sealing device is
A first seal lip including a main lip and an auxiliary lip fixed to the stationary side member and in sliding contact with the rotating side member;
An axial lip that is fixed to the rotation side member and extends radially outward from the rotation side member more radially than the first seal lip to seal a gap between the inner ring and the outer ring;
A second seal lip fixed to the rotating side member and disposed axially outward and radially outward from the first seal lip and the axial lip ,
A resin portion is formed that is fixed to the stationary side member and molds the magnetic sensor with a resin, and the second seal lip is slidably in contact with the resin portion in an axially outward direction from the magnetic sensor ,
The entire surface of the magnetic sensor is covered with the stationary side member and the resin portion, and the magnetic ring has an entire surface of the rotating side member and a lip extending portion extending from the axial lip. It is characterized by being covered .

Inventions of this is the magnetic ring and the magnetic sensor, because integrated with the sealing device for sealing a gap between the inner ring and the outer ring can also workability when assembling a compact improved.

Moreover, the wheel speed detection apparatus of one Embodiment incorporated the said magnetic body ring and a magnetic sensor in the said sealing apparatus .

In this embodiment , since the magnetic ring and the magnetic sensor are built in the sealing device, the space around the wheel can be saved.

Further, the wheel speed detecting device of one embodiment, of the members constituting the sealing device for sealing a gap between the inner ring and the outer ring, the magnetic ring is fixed to the rotating side member, the magnetic sensor on the stationary side member but that has been fixed.

In this embodiment , the magnetic ring is fixed to the rotating side member of the sealing device, the magnetic sensor is fixed to the stationary side member, and the magnetic ring and the magnetic sensor are integrated into the sealing device. Can be made compact, and the workability at the time of assembling can be improved.

Further, the wheel speed detecting device of one embodiment, in the space between the rotation-side member of the seal device and the stationary member are opposed, that have the magnetic ring and the magnetic sensor are arranged.

In this embodiment , since the magnetic ring and the magnetic sensor are arranged in the space where the rotation side member and the stationary side member of the seal device face each other, the space around the wheel can be saved, and the workability at the time of assembly is compact. Can also be improved.

Further, the wheel speed detecting device of one embodiment, both sides of the portion where the magnetic ring and the magnetic sensor are opposed, that have seal portion of the seal apparatus is provided.

In this embodiment , since the seal portions are provided on both sides of the facing portion where the magnetic ring and the magnetic sensor face each other, it is possible to prevent water from entering the bearing rather than the magnetic sensor. In addition, the lubricant can be prevented from leaking from the inside of the bearing to the outside.

Further, the wheel speed detecting device of one reference example, the magnetic material ring and the magnetic sensor, that located opposite the obliquely with respect to the axis of rotation of the inner ring and the outer ring.

In this reference example , since the magnetic ring and the magnetic sensor are opposed obliquely with respect to the rotation axes of the inner ring and the outer ring, the radial dimension can be reduced and the size can be reduced.

Further, the wheel speed detecting device of one reference example, stationary member of the seal device, that serve as the magnetic path of the magnetic sensor.

In this reference example, since the stationary side member of the sealing device also serves as the magnetic path (yoke) of the magnetic sensor, the number of parts can be reduced and the size can be reduced.

Further, the wheel speed detection device of one reference example is provided with a seal portion formed by a slinger and an axial seal lip that is in sliding contact with the slinger on the outer side in the axial direction of the portion where the magnetic ring and the magnetic sensor face each other. between the sealing portion and the facing portion that has a main sealing portion.

In this reference example , since an additional seal portion constituted by a slinger and an axial seal lip is provided outside the main seal portion, the seal performance can be improved, and in particular, the waterproof performance for the sensor portion can be improved.

Moreover, the wheel speed detection device of one embodiment comprises the sealing device as a rotation side member and a stationary side member,
The magnetic ring fixed to the rotating side member, the magnetic ring, covered with an elastic member of non-magnetic.

In this embodiment , since the magnetic ring is covered with the nonmagnetic elastic member, it is possible to prevent magnetic foreign matters such as iron powder from adhering to the magnetic ring, and it is possible to prevent the generation of noise.

Further, in the wheel speed detection device of one reference example , the stationary side member and the rotating side member form a labyrinth seal, and the nonmagnetic elastic member extends in the axial direction and is in sliding contact with the stationary side member. And a main lip extending in the radial direction and in sliding contact with the stationary side member .

In this reference example , the labyrinth seal formed by the stationary member and the rotating member, the axial lip, and the main lip can be sealed at three locations, so that water can be reliably prevented from entering the bearing.

Further, in the wheel speed detection device of one reference example , the non-magnetic elastic member includes an auxiliary lip that is in sliding contact with the stationary member inside the main lip .

Since the reference example includes the auxiliary lip that is in sliding contact with the stationary member inside the main lip, the waterproof performance can be further improved.

Further, the wheel speed detecting device of one reference example, the stationary-side member, Ru stainless steel or copper or aluminum der austenitic.

In this reference example , the stationary member for fixing the magnetic sensor is made of austenitic stainless steel, copper, or aluminum and is made non-magnetic, so that the magnetic detection accuracy of the magnetic sensor can be improved.

Moreover, the wheel speed detection device of one reference example comprises the sealing device as a stationary member and a rotating member,
An axial lip extending axially outward from the axially outer surface of the rotating side member and slidably contacting the axially inner surface of the stationary side member;
A magnetic ring was fixed to the inner side surface in the axial direction of the rotating side member, and a magnetic sensor was fixed to the outer side surface in the axial direction of the stationary side member .

In this reference example , the magnetic ring is fixed to the inner side surface of the rotation side member, and the axial lip is fixed to the outer side surface of the rotation side member. Therefore, the magnetic ring from the inner side of the rotation side member is not obstructed by the axial lip. Can be easily magnetized.

Also, a car wheel speed detecting device of one embodiment, the rotary member is Ru magnetic der.

In this embodiment , since the rotation side member that fixes the magnetic ring is a magnetic body, the magnetic force of the magnetic ring can be enhanced.

Also, a car wheel speed detecting device of one embodiment, that have the magnetic ring and the magnetic sensor are diametrically opposed.

In this embodiment , since the magnetic body ring and the magnetic sensor face each other in the radial direction, the axial dimension can be reduced, and the axial direction can be made compact.

Also, a car wheel speed detecting device of one embodiment, the sealing device is constituted by a stationary-side member and the rotational-side member,
A magnetic ring is fixed to the rotating side member, a magnetic sensor is fixed to the stationary side member,
A main lip fixed to the rotating side member or the stationary side member and sealing a path between the rotating side member and the stationary side member, a first auxiliary lip inside the main lip, and an axial outside the main lip A lip and a second auxiliary lip outside the axial lip were provided .

In this embodiment , since the second auxiliary lip outside the axial lip is provided in addition to the main lip, the first auxiliary lip, and the axial lip, the sealing performance can be improved. In addition, the second auxiliary lip prevents the muddy water from being directly applied to the axial lip, so that the muddy water resistance can be improved.

Also, a car wheel speed detecting device of one embodiment, the inner ring is they become rotation side, the second auxiliary lip is fixed to the rotary side member fixed to the inner ring, extending radially outward , that have adapted to seal the path between the rotatable member and the stationary member.

In this embodiment , since the second auxiliary lip is fixed to the rotating side member fixed to the inner ring on the rotating side, the centrifugal force during rotation causes the second auxiliary lip to move radially outward from the stationary side. Press toward the member. Thereby, the sealing performance at the time of rotation can be improved.

Also, a car wheel speed detecting apparatus of the embodiment is provided with a covering member for covering the magnetic sensor, the covering member has an inclined surface which is inclined with respect to the outer ring and the inner ring of the rotary shaft, the inclination from the surface, that have popped out harness connected to the magnetic sensor.

In this embodiment , since the harness is protruded from the inclined surface of the covering member of the magnetic sensor, the harness take-out width can be widened.

Also, a car wheel speed detecting device of one reference example, the sealing device constituted by a stationary-side member and the rotational-side member, axially facing portion of the rotatable member and the stationary member, the magnetic ring and the magnetic sensor fixed, covering member covering the magnetic sensor, that have one or more protrusions annular forming a labyrinth path which extends radially between the rotary member and the stationary member .

In this reference example, the covering member that covers the magnetic sensor fixed to the stationary side member has a ring-shaped protrusion, and the ring-shaped protrusion is connected to the path extending in the radial direction between the stationary side member and the rotating side member. Form. Therefore, it is not necessary to form an axial lip for sealing the radial path on the rotating side member. For this reason, when magnetizing the magnetic body ring fixed to the radial direction part of the said rotation side member, an axial lip does not become obstructive and it becomes easy to manufacture.

Also, a car wheel speed detecting device of one reference example, the sealing device is constituted by a stationary-side member and the rotational-side member,
A magnetic ring was fixed to the rotating side member, a magnetic sensor was fixed to the stationary side member, and at least a part of the magnetic sensor was disposed in a hole formed in the stationary side member .

In this reference example, since at least a part of the magnetic sensor is disposed in the hole formed in the stationary side member, space saving can be promoted, and the mountability when there is no space is excellent.

Further, the vehicle wheel speed detecting device of one reference example, the stationary member that the magnetic sensor is fixed, that secure all of the sealing lip.

In this reference example, since all the seal lips are fixed to the stationary member to which the magnetic sensor is fixed, the structure is simplified.

Further, the vehicle wheel speed detecting device of one reference example, the stationary member has a removable cover metal member, that has the magnetic sensor is attached to the cover bracket.

In this reference example, since the magnetic sensor is attached to the removable cover metal fitting, it is easy to replace the magnetic sensor.

As is clear from the above, the wheel speed detection device of the present invention integrates a magnetic ring and a magnetic sensor into a seal device that seals the gap between the inner ring and the outer ring, so that the workability during assembly is also compact. Can be improved.

Further, according to the present invention, since the magnetic ring and the magnetic sensor are built in the sealing device, the space around the wheel can be saved.

In the wheel speed detection device of the present invention, the magnetic ring is fixed to the rotating side member of the sealing device, the magnetic sensor is fixed to the stationary side member, and the magnetic ring and the magnetic sensor are integrated into the sealing device. The space around the wheel can be saved, and it is compact and the workability during assembly can be improved.

Further, according to the present invention, since the magnetic ring and the magnetic sensor are arranged in the space where the rotation side member and the stationary side member of the seal device are opposed to each other, the space around the wheel can be saved, and the work at the time of assembly is compact. Can also be improved.

Further, according to the present invention, since the seal portions are provided on both sides of the facing portion where the magnetic ring and the magnetic sensor face each other, it is possible to prevent water from entering the inside of the bearing as compared with the magnetic sensor. In addition, the lubricant can be prevented from leaking from the inside of the bearing to the outside.

In one reference example, since the magnetic ring and the magnetic sensor face each other obliquely with respect to the rotation axes of the inner ring and the outer ring, the radial dimension can be reduced and the size can be reduced.

In one reference example, the stationary side member of the sealing device also serves as the magnetic path (yoke) of the magnetic sensor, so the number of parts can be reduced and the size can be reduced.

Further, in one reference example, since an additional seal portion constituted by a slinger and an axial seal lip is provided outside the main seal portion, the seal performance can be improved, and in particular, the waterproof performance for the sensor portion can be improved. it can.

In one embodiment, since the magnetic ring is covered with a non-magnetic elastic member, it is possible to prevent magnetic foreign matters such as iron powder from adhering to the magnetic ring, and it is possible to prevent the generation of noise.

Further, in one reference example, the labyrinth seal formed by the stationary member and the rotating member, the axial lip, and the main lip can be sealed at three locations, so that water can be reliably prevented from entering the bearing. .

Further, in the reference example, the auxiliary lip that is in sliding contact with the stationary member inside the main lip is provided, so that the waterproof performance can be further improved.

Moreover, in one reference example, the stationary member for fixing the magnetic sensor is made of austenitic stainless steel, copper, or aluminum, and is made nonmagnetic, so that the magnetic detection accuracy of the magnetic sensor can be improved.

Further, in one reference example, since the magnetic body ring is fixed to the inner side surface of the rotation side member and the axial lip is fixed to the outer side surface of the rotation side member, the inner side of the rotation side member is not obstructed by the axial lip. The magnetic ring can be magnetized to facilitate manufacture.

In one embodiment, since the rotation side member which fixes a magnetic body ring is a magnetic body, the magnetic force of a magnetic body ring can be strengthened.

In one embodiment, since the magnetic ring and the magnetic sensor face each other in the radial direction, the axial dimension can be reduced, and the axial direction can be made compact.

In the embodiment, since the second auxiliary lip outside the axial lip is provided in addition to the main lip, the first auxiliary lip, and the axial lip, the sealing performance can be improved. In addition, the second auxiliary lip prevents the muddy water from being directly applied to the axial lip, so that the muddy water resistance can be improved.

In one embodiment, since the 2nd auxiliary lip is being fixed to the rotation side member fixed to the inner ring on the rotation side, centrifugal force at the time of rotation makes the 2nd auxiliary lip radially outside. Press toward the stationary member. Thereby, the sealing performance at the time of rotation can be improved.

Moreover, in one Embodiment, since the harness is protruded from the inclined surface of the coating | coated member of a magnetic sensor, the harness extraction width | variety can be widened.

In one reference example, the covering member that covers the magnetic sensor fixed to the stationary member has a ring-shaped protrusion, and the ring-shaped protrusion extends in the radial direction between the stationary member and the rotating member. Form a labyrinth in the pathway. Therefore, it is not necessary to form an axial lip for sealing the radial path on the rotating side member. For this reason, when magnetizing the magnetic body ring fixed to the radial direction part of the said rotation side member, an axial lip does not become obstructive and it becomes easy to manufacture.

Moreover, in one reference example, since at least a part of the magnetic sensor is disposed in the hole formed in the stationary side member, space saving can be promoted, and the mountability when there is no space is excellent.

In one reference example, since all the seal lips are fixed to the stationary member to which the magnetic sensor is fixed, the structure is simplified.

In one reference example, since the magnetic sensor is attached to the removable cover metal fitting, the magnetic sensor can be easily replaced.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

[First Reference Example ]
FIG. 1 shows a first reference example of the wheel speed detection device of the present invention. The first reference example is a wheel speed detection device integrated in a seal device 5 that seals between an inner ring 2 and an outer ring 3 of a ball bearing 1.

  The sealing device 5 includes a cored bar 6 fixed to the inner peripheral surface 3A of the outer ring 3 on the rotating side and a slinger 7 fixed to the outer peripheral surface 2A of the inner ring 2 on the stationary side. The cored bar 6 has a cylindrical portion 6A protruding in the axial direction from the outer ring 3, and a flange portion 6B extending radially outward from the cylindrical portion 6A. A plurality of windows 8 are formed in the cylindrical portion 6A at predetermined intervals in the circumferential direction, and a seal lip 10 made of a nonmagnetic elastic member is fixed to the flange portion 6B. 6 A of cylinder parts comprise the magnetic body ring 9 of a wheel speed detection apparatus. The seal lip 10 has a main lip 10A, an auxiliary lip 10B, and an axial lip 10C. Further, the seal lip 10 has a lid portion 10D that closes the window 8 of the cylindrical portion 6A.

  On the other hand, the slinger 7 includes an inner cylinder part 7A and an outer cylinder part 7B, and a disk plate part 7C that connects the inner cylinder part 7A and the outer cylinder part 7B. A magnetic sensor 11 is fixed to the inner peripheral surface of the inner cylinder portion 7A. The magnetic sensor 11 includes a magnet 12, a coil 13, and a yoke 15. This magnetic sensor 11 is opposed to the cylindrical portion 6A with window 8 constituting the magnetic ring 9 from the inside. A signal line 16 is connected to the coil 13. The signal line 16 passes through the cylindrical hole 17 formed in the disc plate portion 7C of the slinger 7 and is drawn out in the axial direction. A cylindrical connector 18 is fitted in the cylindrical hole 17 of the slinger 7, and the signal line 16 passes through the approximate center of the connector 18.

  Further, the disk plate portion 7C of the slinger 7 faces the flange portion 6B of the core metal 6, and the main lip 10A and the auxiliary lip 10B fixed to the flange portion 6B are in sliding contact. Further, the axial lip 10C is in sliding contact with the inner peripheral surface of the outer cylindrical portion 7B of the slinger 7.

  The cylindrical portion 6A of the mandrel 6 and the magnetic sensor 11 constituting the magnetic ring 9 constitute the wheel speed detecting device of the first embodiment. The magnetic sensor 11 is covered with a resin 14.

  When the outer ring 3 rotates with respect to the inner ring 2, the wheel speed detection device having the above configuration rotates the core metal 6 that forms the magnetic ring 9 integrally with the outer ring 3, and changes the magnetic field due to the rotation of the magnetic ring 9. A signal representing the number of rotations detected by the magnetic sensor 11 is taken out from the signal line 16 to the outside. On the other hand, the sealing device 5 has a seal lip 10 fixed to the metal core 6 to prevent water and dust from entering the inside of the bearing from the outside, and to prevent lubricating oil from leaking from the inside of the bearing to the outside.

The wheel speed detection device of the first reference example is integrated inside the sealing device 5 and the magnetic ring 9 is a part of the sealing device 5 (core metal 6). As a result, the number of parts can be reduced, space saving and assembly workability can be improved.

[Second Reference Example ]
Next, FIG. 2 shows a second reference example of the wheel speed detection device of the present invention. The second reference example is integrated in a seal device 23 that seals between the inner ring 21 and the outer ring 22 of the bearing. The seal device 23 includes a ring-shaped rotating side member 25 having an L-shaped cross section fixed to the outer peripheral surface of the inner ring 21, and a ring-shaped stationary side member 26 fixed to the inner peripheral surface of the outer ring 22. Yes. The stationary side member 26 includes an outer cylindrical portion 26A, an inner cylindrical portion 26B, and a disk plate portion 26C that is continuous between both cylindrical portions. A two-layered seal lip 27 having an H-shaped cross section is fixed to the tip of the flange portion 25A of the rotation side member 25. The seal lip 27 is formed in the outer cylindrical portion 26A of the stationary side member 26. It comes in sliding contact with the peripheral surface. On the other hand, a seal lip 28 is fixed to the tip of the cylindrical portion 25B of the rotation side member 25, and the seal lip 28 is in sliding contact with the outer peripheral surface of the inner cylindrical portion 26B of the stationary member 26.

  On the other hand, a magnetized pulsar ring 30 as a magnetic ring is fixed to the outer surface in the axial direction of the flange portion 25 </ b> A of the rotation side member 25. A magnetic sensor 31 is fixed to the inner surface of the disc plate portion 26C of the stationary member 26, and faces the magnetized pulsar ring 30 in the axial direction. The magnetized pulsar ring 30 is made of a material in which rubber or resin is mixed with magnetic powder, and is magnetized so that N and S poles are alternately arranged in the circumferential direction. On the other hand, the magnetic sensor 31 is formed of a semiconductor circuit, and the magnetic sensor 31 is fitted between the outer cylindrical portion 26A and the inner cylindrical portion 26B of the stationary member 26 and is covered with a resin 32. Further, the signal line 33 from the magnetic sensor 31 is taken out through the hole 34 formed in the disk part 26C of the stationary member 26 to the outside in the axial direction, and the edge 35 of the hole 34 is connected to the edge 35 via the O-ring 36. It is disposed in the attached cylindrical connector 37.

  The magnetized pulsar ring 30 and the magnetic sensor 31 constitute the wheel speed detecting device of this embodiment. Also in this embodiment, since the magnetized pulsar ring 30 and the magnetic sensor 31 are integrated inside the seal device 23, compactness and space saving can be achieved, and the assembly workability is improved. Further, since the seal portions are formed by the seal lips 27 and 28 on both sides of the portion where the magnetized pulsar ring 30 and the magnetic sensor 31 are opposed to each other, water can be prevented from entering the inside of the magnetic sensor 31, and This prevents the lubricating oil from leaking from the inside of the bearing to the outside.

In the second reference example , the magnetized pulsar ring 30 and the magnetic sensor 31 are opposed to each other in the axial direction. However, as shown in FIG. 3, the inner peripheral surface of the cylindrical portion 43A that is long in the axial direction of the stationary member 43 The magnetic pulsar ring 41 may be fixed to the outer peripheral surface of the cylindrical portion 45A that is long in the axial direction of the rotary member 45 so that the magnetic pulsar ring 41 and the magnetic sensor 42 are opposed to each other in the radial direction. . In the second reference example and the embodiment described below, the magnetized pulsar ring is opposed to the front surface of the magnetic sensor. However, the magnetized pulsar ring and the magnetic sensor may be opposed obliquely. Moreover, it is good also as the arrangement | positioning shifted from the front facing position of a magnetization pulsar ring and a magnetic sensor to a non-facing position along a facing surface. It was confirmed that the magnetic sensor can detect the magnetic change due to the rotation of the magnetized pulsar ring even in the above-described obliquely opposed arrangement and non-opposed arrangement.

[Third Reference Example ]
Next, FIG. 4 shows a third reference example of the wheel speed detection device of the present invention. The third reference example is integrated in a seal device 53 disposed between the inner ring 51 and the outer ring 52. The inner ring 51 is externally fitted to the inner cylinder 50. A ball 54 is disposed between the inner ring 51 and the outer ring 52, and a ball 59 is disposed between the inner cylinder 50 and the outer ring 52.

  The sealing device 53 includes a rotation-side annular member 55 fixed to the outer peripheral surface of the rotation-side inner ring 51 and a stationary-side annular member 57 fixed to the inner peripheral surface of the stationary-side outer ring 52. The rotation-side annular member 55 has a substantially V-shaped cross section, and includes an axial cylindrical portion 55A and an oblique flange 55B. The stationary-side annular member 57 has an axial cylindrical portion 57A and inner flanges 57B and 57C at both ends thereof. A seal lip 58 is fixed to the inner flange 57C, and the seal lip 58 includes an axial lip 58A that is in sliding contact with the inner surface of the inclined flange 55B of the rotation-side annular member 55, and a rotation-side annular It has a main lip 58B and an auxiliary lip 58C that come into sliding contact with the axial cylindrical portion 55A of the member 55.

  A base 60A of the wire harness 60 is fixed from the inner flange 57B of the stationary annular member 57 to the axial cylindrical portion 57A. An outer seal lip 61 in which the main lip 61A and the auxiliary lip 61B are in sliding contact with the outer peripheral surface of the inner ring 51 is resin-molded on the base portion 60A. The base portion 60 </ b> A has an oblique surface 62 that faces the oblique flange 55 </ b> B of the rotation-side annular member 55 with a predetermined gap, and a magnetic sensor 63 is embedded in the oblique surface 62. The magnetic sensor 63 includes a semiconductor circuit and is connected to the signal processing circuit 65. Further, a magnetized pulsar ring 66 as a magnetic ring is fixed to the oblique flange 55B so as to face the magnetic sensor 63. The magnetized pulsar ring 66 is made of rubber or resin mixed with magnetic powder and magnetized so that N and S poles are alternately arranged in the circumferential direction.

  Since the wheel speed detecting device constituted by the magnetic sensor 63 and the magnetized pulsar ring 66 is integrated in the seal device 53, it is compact and has good assembling workability. Further, since the magnetic sensor 63 and the magnetized pulsar ring 66 face each other obliquely with respect to the relative rotational axes of the inner ring 51 and the outer ring 52, the radial dimension can be reduced, and the compactness can be promoted.

[Fourth Reference Example ]
Next, FIG. 5 shows a fourth reference example of the wheel speed detection device of the present invention. The fourth reference example is integrated with a seal device 73 disposed between the inner ring 71 and the outer ring 72. The inner ring 71 is fitted on the shaft 74. A ball 79 is disposed between the shaft 74 and the outer ring 72, and a ball 70 is disposed between the inner ring 71 and the outer ring 72.

  The sealing device 73 includes a rotation-side annular member 76 having a U-shaped cross section fixed to the outer peripheral surface of the inner ring 71 and a stationary-side annular member 78 having a U-shaped cross section fixed to the inner peripheral surface of the outer ring 72. The stationary side annular member 78 is fitted inside the rotating side annular member 76 with a predetermined gap. Seal lips 80 and 81 are fixed to the radially inner ends 78A and 78B of the stationary annular member 78, respectively. The seal lips 80 and 81 are the cylindrical peripheral surface and the disk of the rotating annular member 76, respectively. It comes into sliding contact with the circumferential surface.

  A plurality of windows 82 are formed at predetermined intervals in the circumferential direction in the cylindrical portion of the rotation-side annular member 76 to form a magnetic ring 83. In addition, a magnet 85 and a coil 86 are fixed inside the stationary side annular member 78 to constitute a magnetic sensor 87. The stationary annular member 78 is made of a magnetic material and serves as a yoke (magnetic path) of the magnetic sensor 87.

In the wheel speed detecting device of the fourth reference example , a magnetic ring 83 is formed by the rotating side annular member 76 of the sealing device 73, and the stationary side annular member 78 of the sealing device 73 serves as a yoke (magnetic path) of the magnetic sensor 87. This also serves as a reduction in the number of parts and further promotes downsizing.

[Fifth Reference Example ]
Next, FIG. 6 shows a fifth reference example of the wheel speed detection device of the present invention. The fifth reference example is integrated with a seal device 93 disposed between the inner ring 91 and the outer ring 92. As shown in FIG. 7, the inner rings 91 are arranged in two rows adjacent to each other in the axial direction, and balls 94 are arranged between the inner rings 91 and the outer ring 92. Further, a sealing device 99 having a structure similar to that of the sealing device 93 is disposed on the opposite side of the sealing device 93 in the axial direction.

  The seal device 93 includes an annular L-shaped slinger 95 fixed to the outer peripheral surface of the inner ring 91 and another annular L-shaped slinger fixed to the axially inner portion 95A of the slinger 95. 96, and the two slinger 95 and 96 constitute the rotation side member 97. Further, the seal device 93 has an annular cored bar 98 as a stationary side member fixed to the inner peripheral surface of the outer ring 92. The annular cored bar 98 includes a bent portion 100 that protrudes outward in the axial direction and a protruding portion 101 that protrudes inward in the radial direction. A resin portion 102 is formed along the protruding portion 101 so as to fill the inside of the bent portion 100, and a magnetic sensor 103 is molded on the resin portion 102. A signal line 104 is connected to the magnetic sensor 103, and the signal line 104 is connected to a harness 109 fixed to the outer surface of the bent portion 100 of the core metal 98.

  A magnetic ring 105 is fixed to the radial portion 96 </ b> A of the slinger 96 so as to face the magnetic sensor 103. On the other hand, a seal lip 106 is fixed to the protruding portion 101 of the core metal 98. The seal lip 106 includes a main lip 106A and an auxiliary lip 106B on the axially inner side of the main lip 106A. The main lip 106A and the auxiliary lip 106B are in sliding contact with the axial portion 95A of the slinger 95.

  Further, the seal lip 106 includes an axial lip 106C extending in the oblique axial direction outside the main lip 106A in the radial direction. The axial lip 106C extends obliquely outward in the axial direction and outward in the radial direction, and is in sliding contact with the radial direction portion 95B of the slinger 95.

In the wheel speed detection device of the fifth reference example , the magnetic ring 105 and the magnetic sensor 103 are integrated in the seal device 93, so that compactness and space saving can be achieved, and assembling workability is also improved. Further, after the labyrinth structure is formed by the slinger 95, 96 and the core metal 98, the seal lip 106 from the core metal 98 is slidably contacted with the slinger 95 by the three lips of the main lip 106A, the auxiliary lip 106B, and the axial lip 106C. Therefore, waterproof performance can be improved.

[Sixth Reference Example ]
Next, FIG. 8 shows a sixth reference example of the wheel speed detecting device of the present invention. The sixth reference example is integrated with a seal device 113 disposed between the inner ring 111 and the outer ring 112. The seal device 113 includes a core bar 115 having a substantially inverted L-shaped cross section fixed to the inner peripheral surface of the outer ring 112 on the rotation side, and a slinger 116 having a substantially L-shaped cross section fixed to the inner ring 111 on the stationary side. . The cored bar 115 and the slinger 116 have facing parts 115A and 116A that face each other in the axial direction. A magnetizing pulsar ring 117 as a magnetic ring is fixed to the facing portion 115 </ b> A of the metal core 115. A seal lip 118 made of a nonmagnetic elastic member is fixed to the facing portion 115A of the core metal 115 so as to cover the magnetized pulsar ring 117. The seal lip 118 includes an auxiliary lip 118A, a main lip 118B, and an axial lip 118C. The auxiliary lip 118A and the main lip 118B are in sliding contact with the cylindrical portion 116B of the slinger 116, and the axial lip 118C is in sliding contact with the opposing portion 116A of the slinger 116. The axial lip 118C extends axially outward and radially outward from the base toward the tip.

  On the other hand, the magnetic sensor 120 is fixed to the outer surface of the facing portion 116 </ b> A of the slinger 116. The magnetic sensor 120 is molded and covered with a resin constituting the mold part 121. The mold portion 121 forms a labyrinth 122 so as to face the shaft end portion 115 </ b> C of the core metal 115 and the shaft end surface 112 </ b> A of the outer ring 112. The mold part 121 has an inclined surface 121A that is inclined with respect to a plane perpendicular to the axis of rotation, and the inclined surface 121A is a surface from which the signal line 123 is extracted from the magnetic sensor 120. The inclined surface 121A has an upward slope from the axially outer side toward the axially inner side.

In the sixth reference example , the magnetized pulsar ring 117 is covered with the seal lip 118 made of a nonmagnetic elastic member, so that iron powder or the like adheres to the magnetized pulsar ring 117 and connects the adjacent S pole and N pole. Is not formed. Therefore, magnetic noise can be reduced and the rotational speed detection accuracy can be improved. In the sixth reference example , the labyrinth 122 is formed by the mold part 121 in addition to the three lips 118A, 118B, and 118C included in the seal lip 118, so that the waterproof performance can be improved. In the sixth reference example , since the slinger 116 for fixing the magnetic sensor 120 is made of austenitic stainless steel and made non-magnetic, the magnetic detection accuracy of the magnetic sensor 120 can be improved. In the sixth embodiment, the signal line 123 can be taken out from the inclined surface 121 </ b> A of the mold part 121.

[Seventh Reference Example ]
Next, FIG. 9 shows a seventh reference example of the wheel speed detection device of the present invention. This seventh reference example is different from the sixth reference example of FIG. 8 in that a magnetized pulsar ring 117 is fixed to the inner surface 115A-1 of the facing portion 115A of the core metal 115. In the sixth reference example , since the magnetized pulsar ring 117 is fixed to the inner side surface 115A-1 of the facing portion 115A of the core metal 115, the non-magnetized pulsar ring 117 made of a material obtained by mixing magnetic powder into rubber or resin. In addition, it can be magnetized from the inside in the axial direction. Therefore, the axial lip 118C does not get in the way during magnetization.

In the seventh reference example , since the cored bar 115 is made of a magnetic material, the magnetic force of the pulsar ring 117 can be enhanced.

EXAMPLES shaped state]
Next, FIG. 10 shows an implementation form of the wheel speed detecting apparatus of the present invention. This eighth embodiment is integrated with a seal device 133 disposed between the inner ring 131 and the outer ring 132. The seal device 133 includes a cored bar 135 as a stationary member fixed to the inner peripheral surface of the stationary outer ring 132 and a slinger 136 as a rotating member fixed to the outer peripheral surface of the rotating inner ring 131. ing.

  The cored bar 135 includes a cylindrical portion 135A, and an outer rod 135B and an inner rod 135C extending in the radial direction from both axial ends of the cylindrical portion 135A. A seal lip 137 having a main lip 137A and a first auxiliary lip 137B is fixed to the tip of the inner collar 135C. On the other hand, the slinger 136 includes a disk portion 136A, and an outer cylinder portion 136B and an inner cylinder portion 136C that extend inward in the axial direction from both radial ends of the disk portion 136A. The main lip 137A and the first auxiliary lip 137B of the seal lip 137 are in sliding contact with the inner cylindrical portion 136C of the slinger 136. A seal lip 138 is fixed to the outer cylinder portion 136B of the slinger 136. The seal lip 138 includes an axial lip 140 that is in sliding contact with the inner flange 135 </ b> C of the core metal 135, and a fourth lip 141 that is axially outward of the axial lip 140. The seal lip 138 covers a magnetized pulsar ring 142 fixed to the inner side surface of the outer cylinder portion 136B of the slinger 136.

  On the other hand, a magnetic sensor 143 is fixed to the cylindrical portion 135A of the cored bar 135, and this magnetic sensor 143 is embedded in a resin portion 145 as a covering member. The fourth lip 141 of the seal lip 138 is in sliding contact with the resin portion 145. The resin portion 145 has a shaft end portion 145A that is in close contact with the outer casing 135B of the core bar 135, and the shaft end portion 145A has an inclined surface 146 that is inclined with respect to the rotation axis. Yes. The inclined surface 146 is an upward slope from the outside in the axial direction toward the inside, and the harness 147 protrudes from the inclined surface 146. The harness 147 is connected to the signal line 148 from the magnetic sensor 143.

In the wheel speed detecting device of the implementation form of this, since the magnetized pulser ring 142 and the magnetic sensor 143 are diametrically opposed, it is possible to reduce the axial dimension, thereby the size of the axial direction. Moreover, implementation form of this, the main lip 137A, the auxiliary lip 137B, in addition to the axial lip 140, so with the second auxiliary lip 141 of the outer axial lip 140, can be improved sealing performance. In particular, since the second auxiliary lip 141 prevents the muddy water from being applied directly to the axial lip 140, the muddy water resistance can be improved. Moreover, implementation form of this, the second auxiliary lip 141, from being fixed to the slinger 136 which is fixed to the inner ring 131 of the rotary side, a centrifugal force during rotation, the diameter of the second auxiliary lip 141 Since it presses toward the core metal 135 (cylindrical inner peripheral surface 144 of the resin portion 145) on the outer side in the direction, the sealing performance during rotation can be improved. Moreover, implementation form of this is because they protrude harness 147 from the inclined surface 146 of the resin portion 145 that covers the magnetic sensor 143, it is possible to widen the harness take out width. Moreover, implementation forms of this are, on the magnetized pulser ring 142 is completely covered with the seal lip 138, the seal lip 137 and the seal lip 138 is located inside the sealing portion forming, the magnetized pulser ring 142 There is no need to worry about magnetic foreign matter adhering, noise generation can be suppressed, and accurate speed detection can be achieved.

[ Eighth Reference Example ]
Next, FIG. 11 shows an eighth reference example of the wheel speed detection device of the present invention. The eighth reference example is integrated with a seal device 153 disposed between the inner ring 151 and the outer ring 152. The sealing device 153 includes a core bar 155 having a substantially inverted L-shaped cross section fixed to the inner peripheral surface of the outer ring 152 on the rotating side, and a slinger 156 having an inverted L-shaped cross section fixed to the inner ring 151 on the stationary side. . The cored bar 155 and the slinger 156 have opposing portions 155A and 156A that face each other in the axial direction. A magnetized pulsar ring 157 as a magnetic ring is fixed to the facing portion 155A of the cored bar 155. A seal lip 158 made of a nonmagnetic elastic member is fixed to the facing portion 155A of the cored bar 155 so as to cover the magnetized pulsar ring 157. The seal lip 158 has a main lip 158A and an auxiliary lip 158B that are in sliding contact with the cylindrical portion 156B of the slinger 156.

  On the other hand, a magnetic sensor 160 is fixed to the inner surface of the facing portion 156A of the slinger 156, and this magnetic sensor 160 is completely covered with a resin portion 161 molded on the slinger 156. The resin portion 161 has an annular inner diameter protrusion 162 and an annular outer diameter protrusion 163 protruding inward in the axial direction from the front surface of the magnetic sensor 160 toward the magnetized pulsar ring 157. The protrusion 162 and the protrusion 163 form a labyrinth 165 between the thin portion 158C of the seal lip 158 covering the magnetized pulsar ring 157.

According to the eighth reference example , the resin portion 161 covering the magnetic sensor 160 fixed to the slinger 156 has the ring-shaped protrusions 162 and 163, and the ring-shaped protrusions 162 and 163 are the core metal 155 and the slinger 156. A labyrinth 165 is formed in a radially extending path between the two. Therefore, since it is not necessary to form an axial lip for sealing the path in the radial direction on the cored bar 155, when magnetizing the magnetized pulsar ring 157 fixed to the opposing part (radial part) 155A of the cored bar 155, The axial lip does not get in the way and the manufacturing is easy.

  Further, the point that the resin portion 161 can widen the harness take-out width by the inclined surface 161A at the shaft end is the same as in the sixth and seventh embodiments shown in FIGS.

In the eighth reference example , the magnetizing pulsar ring 157 is fixed to the outer surface in the axial direction of the facing portion 155A of the cored bar 155. You may fix to the side.

[ Ninth Reference Example ]
Next, FIG. 12 shows a ninth reference example of the wheel speed detection device of the present invention. The ninth reference example is integrated with a sealing device 173 disposed between the inner ring 171 and the outer ring 172. The sealing device 173 includes a slinger 175 having a reverse L-shaped cross section as a rotation side member fixed to the inner peripheral surface of the outer ring 172 on the rotation side, and a stationary side member fixed to the outer peripheral surface of the inner ring 171 on the stationary side. A core bar 176 having an L-shaped cross section is provided.

  The core metal 176 having an L-shaped cross section includes a cylindrical portion 176A and a flange portion 176B extending in the radial direction from the outer end in the axial direction of the cylindrical portion 176A. The flange 176 </ b> B has an axial through hole 177, and the magnetic sensor 178 is fitted in the axial through hole 177. A seal lip 180 is fixed to the cored bar 176 so as to cover the magnetic sensor 178. The seal lip 180 includes a main lip 180A, an auxiliary lip 180B, and an axial lip 180C. The axial lip 180C extends obliquely inward in the axial direction and outward in the radial direction from the root toward the tip. The main lip 180A and the auxiliary lip 180B are in sliding contact with the cylindrical portion 175A of the slinger 175 having an inverted L-shaped cross section, and the axial lip 180C is in sliding contact with the flange portion 175B of the slinger 175 having an inverted L-shaped cross section. .

  Further, a magnetized pulsar ring 181 as a magnetic ring is fixed on the outer surface in the axial direction of the flange portion 175B of the slinger 175 having an inverted L-shaped cross section so as to face the magnetic sensor 178.

The magnetized pulsar ring 181 and the magnetic sensor 178 constitute the wheel speed detection device of the ninth reference example . A signal line 182 is connected to the radially inner end surface of the magnetic sensor 178, and the signal line 182 is embedded in a resin portion 183 fixed to the end surface of the cored bar 176 so as to be axially outward and radially outward. It extends to.

In the ninth reference example , since a part of the magnetic sensor 178 is disposed in the axial through hole 177 formed in the cored bar 176, space saving can be promoted and the mountability when there is no space is excellent. In the tenth embodiment, since all the seal lips (main lip 180A, auxiliary lip 180B, and axial lip 180C) are fixed to the cored bar 176 to which the magnetic sensor 178 is fixed, the structure is simplified. .

[ 10th Reference Example ]
Next, FIG. 13 shows a tenth reference example of the wheel speed detection device of the present invention. The tenth reference example includes a magnetic sensor 193 and a magnetized pulsar ring 203, and is integrated in a seal device 187 disposed between the inner ring 185 and the outer ring 186. The sealing device 187 includes an inverted L-shaped cored bar 188 fixed to the inner peripheral surface of the stationary outer ring 186 and an anti-L-shaped slinger 191 fixed to the outer peripheral surface of the rotating inner ring 185. Is provided. Furthermore, the sealing device 187 includes an inverted L-shaped metal fitting 192 that is fixed so as to overlap the cylindrical portion 188A of the cored bar 188. A magnetic sensor 193 is fixed to the inner side surface of the shaft end radial direction portion 192A of the inverted L-shaped metal fitting 192, and the magnetic sensor 193 is covered with a resin 194. The signal line 195 extending from the magnetic sensor 193 extends obliquely outward in the resin portion 197 through the hole 196 formed in the cylindrical portion 192B of the inverted L-shaped metal fitting 192. The resin portion 197 is fixed to the inverted L-shaped metal fitting 192 and extends obliquely outward.

  The second auxiliary lip 200 is fixed to an inner end 198 bent inward of the radial portion 192A of the inverted L-shaped metal fitting 192. The second auxiliary lip 200 is in sliding contact with the flange portion 191A of the slinger 191 from the outside.

  On the other hand, the main lip 201 and the first auxiliary lip 202 are fixed to the inner end of the inner collar 188B of the cored bar 188, and the main lip 201 and the first auxiliary lip 202 are in sliding contact with the cylindrical portion 191B of the slinger 191. It has become. Further, the tip portion 191A-1 of the flange portion 191A of the slinger 191 is bent inward, and a magnetized pulsar ring 203 as a magnetic ring is fixed to the inner side surface of the tip portion 191A-1. An axial lip 205 made of a nonmagnetic elastic member is fixed to the magnetized pulsar ring 203 so as to cover the magnetized pulsar ring 203, and the axial lip 205 is in sliding contact with the inner flange 188B of the cored bar 188.

The wheel speed detection device of the tenth reference example is protected from an external impact such as a flying stone by an inverted L-shaped metal fitting 192. Further, both the magnetic sensor 193 and the magnetized pulsar ring 203 are covered with a resin 194 made of a non-magnetic member and an axial lip 205 to be protected from moisture and dust. Further, the labyrinth 206 is formed by the inverted L-shaped metal fitting 192 and the slinger 191 and the presence of the additional second auxiliary lip 200 provided on the inverted L-shaped metal fitting 192 improves the sealing performance.

[ Eleventh Reference Example ]
Next, FIG. 14 shows an eleventh reference example of the wheel speed detection device of the present invention. The eleventh reference example includes a magnetic sensor 211 fixed to a stationary side member 215 having a stepped cross section and a magnetized pulsar ring 212 fixed to a fixed side member 216 having a stepped sectional shape.

  The stationary side member 215 is fixed to the outer peripheral surface of the outer ring 217 and extends in the axial direction after being bent inward along the end surface. Further, the rotation side member 216 is fixed to the outer peripheral surface of the inner ring 218, bends radially outward, extends in the axial direction, and faces the stationary side member 215 with a predetermined gap therebetween. ing. The stationary side member 215 and the rotating side member 216 are opposed to each other at the facing portions 215A and 216A. The magnetic sensor 211 is fixed to the outer peripheral surface of the facing portion 215A, and the magnetized pulsar ring is attached to the inner peripheral surface of the facing portion 216A. 212 is fixed.

  The magnetic sensor 211 is completely covered with a resin portion 223 fixed to the stationary member 215. The resin portion 223 has a connection portion 223A protruding in the oblique axis direction.

  The magnetized pulsar ring 212 is covered with a coating 220 made of a nonmagnetic elastic member, and the coating 220 has a seal lip 220A that is in sliding contact with the facing portion 215A of the stationary member 215. A cored bar 221 is fixed to the inner peripheral surface of the outer ring 217, and a seal lip 222 is fixed to the flange 221 </ b> A of the cored bar 221. The seal lip 222 includes a main lip 222A, a first auxiliary lip 222B, and an axial lip 222C. The main lip 222A and the first auxiliary lip 222B are in sliding contact with the cylindrical portion 216B of the rotation side member 216, and the axial lip 222C is in sliding contact with the flange portion 216C of the rotation side member 216.

The wheel speed detection device of the eleventh reference example includes a magnetic sensor 211 and a pulsar ring 212, and is integrated with a sealing device including a stationary member 215, a rotating member 216, a cored bar 221, seal lips 222 and 220A. Yes. Therefore, the overall structure can be simplified and the number of parts can be reduced. Further, since the magnetic sensor 211 and the pulsar ring 212 are completely covered with the resin portion 223 and the covering 220, the influence of foreign matter from the outside can be avoided. Further, the second auxiliary lip 220A can prevent foreign matter from entering the sensor portion.

[Twelfth Reference Example ]
Next, FIG. 15 shows a twelfth reference example of the wheel speed detection device of the present invention. The twelfth reference example includes a magnetized pulsar ring 231 and a magnetic sensor 232 which are opposed in the axial direction. The magnetized pulsar ring 231 is fixed to the core metal 233 and covered with a thin film 235 made of a nonmagnetic elastic member connected to the seal lip 234. The magnetic sensor 232 is fixed to the slinger 236 and covered with a nonmagnetic thin film 238 that is continuous with the resin portion 237.

The cored bar 233 has a disk part 233A that extends radially inward at the axially inner end, and the seal lip 234 is fixed to the disk part 233A. The seal lip 234 has three lips, a main lip 234A, an auxiliary lip 234B, and an axial lip 234C. The main lip 234A and the auxiliary lip 234B are in sliding contact with the cylindrical portion 236A of the slinger 236, and the axial lip 234C is It comes into sliding contact with the flange 236B.

  On the other hand, the resin portion 237 fixed to the slinger 236 has an annular convex portion 237A facing the inner peripheral surface of the outer peripheral wall 233B of the core metal 233, and the annular convex portion 237A is between the outer peripheral wall 233B. Form a labyrinth. Further, the harness 240 protrudes from the shaft end surface 237B of the resin portion 237.

  The cylindrical portion 236 </ b> A of the slinger 236 is fixed to the inner ring 241, and the cylindrical portion 233 </ b> C of the core metal 233 is fixed to the outer ring 242.

  The core metal 233, the slinger 236, the seal lip 234, and the annular convex portion 237A of the resin portion 237 constitute a seal device.

In the wheel speed detection device of the twelfth reference example , the magnetized pulsar ring 231 and the magnetic sensor 232 are integrated in the sealing device, so that the space can be compact and space-saving and the assembling workability can be improved.

  Furthermore, since the labyrinth structure is formed by the annular convex portion 237A fixed to the slinger 236 and the outer peripheral wall 233B of the cored bar 233, it is possible to prevent foreign matter from entering the facing portion of the magnetic sensor 232 and the pulsar ring 231. It is possible to avoid the influence of foreign matter on signals. Further, since the pulsar ring 231 is covered with a thin film 235 made of a nonmagnetic elastic member and the magnetic sensor 232 is covered with a nonmagnetic thin film 238 connected to the resin portion 237, the waterproof property can be improved.

[ 13th Reference Example ]
Next, FIG. 16 shows a thirteenth reference example of the wheel speed detection device of the present invention. The thirteenth reference example is integrated in a seal device 247 that seals the gap between the rotation-side inner ring 245 and the stationary-side outer ring 246.

  The sealing device 247 includes a cored bar 248 fixed to the outer ring 246 and a slinger 250 fixed to the inner ring 245. A seal lip 251 is fixed to the inner diameter portion 248A of the cored bar 248. The seal lip 251 is in sliding contact with the main lip 251A and the first auxiliary lip 251B that are in sliding contact with the cylindrical portion 250A of the slinger 250 and the disk portion 250B of the slinger 250. An axial lip 251C is provided.

  The cored bar 248 includes a bent portion 248B bent along the corner 246A of the outer ring 246, and an outer peripheral portion 248C extending outward in the axial direction from the radial end of the bent portion 248B. A removable cover fitting 252 is attached to the inner side of the outer peripheral portion 248 </ b> C of the cored bar 248. A magnetic sensor 256 is fixed to the resin 254 filled inside the cover fitting 252. The cover fitting 252 includes a radial portion 252A that is bent radially inward from the outer peripheral portion 248C, and a second auxiliary lip 253 is fixed to an end of the radial portion 252A. The second auxiliary lip 253 is in sliding contact with the axial portion 250C of the slinger 250. The cover metal fitting 252 is fixed to the metal core 248 by a caulking portion 255 formed on the outer peripheral portion 248C of the metal core 248, and is slid in the axial direction from the metal core 248 by releasing the caulking by the caulking portion 255. Can be removed. The cover fitting 252 has a hole 258 through which the signal line 257 from the magnetic sensor 256 is passed. The signal line 257 is drawn obliquely outward in the axial direction, and is embedded in the resin portion 259 fixed to the radial portion 252A of the cover metal 252.

The magnetized pulsar ring 260 of the thirteenth reference example is fixed to the axial direction portion 250 </ b> C of the slinger 250 and faces the magnetic sensor 256. In the wheel speed detection device according to the fourteenth embodiment, the magnetic sensor 256 and the pulsar ring 260 are integrated into the seal device 247, so that the compactness can be achieved and the installation work is simplified. Further, in this wheel speed detection device, since the magnetic sensor 256 is attached to the removable cover fitting 252, the magnetic sensor 256 can be easily replaced. In addition, the second auxiliary lip 253 can prevent foreign matter from entering the opposing portion of the pulsar ring 260 and the sensor 256.

[ 14th Reference Example ]
Next, FIG. 17 shows a fourteenth reference example of the wheel speed detection device of the present invention. The fourteenth reference example is integrated in a seal device 263 that seals the gap between the rotating outer ring 261 and the stationary inner ring 262.

  The seal device 263 includes a cored bar 265 fixed to an inner diameter side 261 A of the outer ring 261 and a slinger 266 fixed to the inner peripheral surface of the inner ring 262. A seal lip 267 is fixed to the inner end of the inner radial direction portion 265A of the cored bar 265. The seal lip 267 includes a main lip 267A, an auxiliary lip 267B, and an axial lip 267C. The main lip 267A and the first auxiliary lip 267B are in sliding contact with the inner axial direction portion 266A of the slinger 266, and the axial lip 267C is a disk of the slinger 266. It is in sliding contact with the portion 266B.

  Further, the metal core 265 has an outer axial direction portion 265B, and the cover metal fitting 268 is fixed to the inner side of the outer axial direction portion 265B by the caulking portion 270 of the outer axial direction portion 265B. The cover metal fitting 268 includes an axial portion 268A and a radial portion 268B bent inward in the radial direction. A magnetized pulsar ring 271 is fixed inside the axial portion 268A, and a second auxiliary lip 272 is fixed to the end of the radial portion 268B. The second auxiliary lip 272 is in sliding contact with the axial end of the outer axial direction portion 266C of the slinger 266.

  A magnetic sensor 273 is fixed to the outer axial portion 266C of the slinger 266 so as to face the magnetized pulsar ring 271. The magnetic sensor 273 is covered with a resin layer 275, and a signal line 276 from the magnetic sensor 273 is taken out radially inward through a hole 277 formed in the outer axial portion 266C. This signal line 276 is connected to a harness 278 extending in the circumferential direction, and this harness 278 is placed in a resin portion 280 fixed to the disk portion 266B and the outer axial portion 266C of the slinger 266. Buried.

In the wheel speed detection device of the fourteenth reference example , a harness 278 connected to the signal line 276 from the magnetic sensor 273 is embedded in a resin portion 280 fixed to the disk portion 266B and the axial direction portion 266C of the slinger 266, Since it was taken out in the circumferential direction, the strength of the root of the harness 278 can be secured. Further, since the cover metal 268 is detachably fixed to the metal core 265 by the caulking portion 270 of the metal core 265, the replacement of the magnetized pulsar ring 271 fixed to the cover metal 268 becomes easy. Further, the second auxiliary lip 272 attached to the cover metal fitting 268 can prevent foreign matter from entering the sensor unit.

[ 15th Reference Example ]
Next, FIG. 18 shows a fifteenth reference example of the wheel speed detection device of the present invention. The fifteenth reference example is integrated in a seal device 283 that seals the gap between the rotating outer ring 281 and the stationary inner ring 282.

  The sealing device 283 includes a cored bar 285 fixed to the inner peripheral surface of the outer ring 281, and a first slinger 286 and a second slinger 287 fixed to the outer peripheral surface of the inner ring 282. The metal core 285 includes a radial portion 285A, and a seal lip 288 is fixed to the radial portion 285A. The seal lip 288 has a main lip 288A and an auxiliary lip 288B that are in sliding contact with the cylindrical portion 286A of the first slinger 286, and an axial lip 288C that is in sliding contact with the radial portion 286B of the first slinger 286.

  On the other hand, the second slinger 287 is fixed to the axial end of the outer peripheral surface of the inner ring 282, and includes a radial portion 287A extending radially outward and an axial portion 287B extending axially inward. A magnetic sensor 290 is fixed to the inner side surface of the radial direction portion 287A, and the magnetic sensor 290 is covered with a resin portion 291. Further, the signal line 292 from the magnetic sensor 290 passes through a hole 293 formed in the axial direction portion 287B and is drawn obliquely outward in the axial direction, and inside the resin portion 291 protruding obliquely outward in the axial direction. Embedded in. An annular protrusion 296 that is opposed to the outer peripheral surface of the outer ring 281 with a slight gap in the circumferential direction is fixed to the inner side surface of the axial portion 287B of the second slinger 287.

  A magnetized pulsar ring 297 is fixed to the axial end surface 281A of the outer ring 281 so as to face the magnetic sensor 290.

In the fifteenth reference example , the magnetized pulsar ring 297 is directly bonded to the outer ring 281 on the rotation side, so that the structure becomes simple and the number of parts can be reduced. Further, the annular protrusion 296 formed on the second slinger 287 forms a labyrinth structure, and water and dust can be prevented from entering the magnetized pulsar ring 297.

In the fifteenth reference example , the magnetic sensor 290 is fixed to the inner surface of the radial portion 287A of the second slinger 287. However, as shown in FIG. 19, the magnetic sensor 290 is fixed to the outer surface of the radial portion 287A. May be. In this case, since the second slinger 287 can be brought close to the outer ring 281, it can be made compact.

It is sectional drawing of the 1st reference example of the wheel speed detection apparatus of this invention. It is sectional drawing of the 2nd reference example of the wheel speed detection apparatus of this invention. It is sectional drawing of the modification of the said 2nd reference example . It is sectional drawing of the 3rd reference example of the wheel speed detection apparatus of this invention. It is sectional drawing of the 4th reference example of the wheel speed detection apparatus of this invention. It is sectional drawing of the 5th reference example of the wheel speed detection apparatus of this invention. It is sectional drawing which shows the structure of the periphery of the wheel speed detection apparatus of the said 5th reference example . It is sectional drawing of the 6th reference example of the wheel speed detection apparatus of this invention. It is sectional drawing of the 7th reference example of the wheel speed detection apparatus of this invention. It is sectional drawing of embodiment of the wheel speed detection apparatus of this invention. It is sectional drawing of the 8th reference example of the wheel speed detection apparatus of this invention. It is sectional drawing of the 9th reference example of the wheel speed detection apparatus of this invention. It is sectional drawing of the 10th reference example of the wheel speed detection apparatus of this invention. It is sectional drawing of the 11th reference example of the wheel speed detection apparatus of this invention. It is sectional drawing of the 12th reference example of the wheel speed detection apparatus of this invention. It is sectional drawing of the 13th reference example of the wheel speed detection apparatus of this invention. It is sectional drawing of the 14th reference example of the wheel speed detection apparatus of this invention. It is sectional drawing of the 15th reference example of the wheel speed detection apparatus of this invention. It is sectional drawing which shows the modification of the said 15th reference example .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Ball bearing 2,21,51,71,91,111,131,151,171,185,218,241,245,262,282 ... Inner ring 3,22,52,72,92,112,132 , 152,172,186,217,242,246,261,281 ... outer ring,
5, 23, 53, 73, 93, 113, 133, 153, 173, 187, 247, 263, 283 ... sealing device,
6 ... Metal core, 7 ... Slinger, 8 ... Window, 9 ... Magnetic ring, 10 ... Seal lip,
DESCRIPTION OF SYMBOLS 11 ... Magnetic sensor, 12 ... Magnet, 13 ... Coil, 16 ... Signal line, 17 ... Cylindrical hole,
18 ... Connector, 25 ... Rotation side member, 26 ... Stationary side member,
27, 28 ... Seal lip, 30 ... Magnetized pulsar ring, 31 ... Magnetic sensor,
32 ... Resin, 33 ... Signal line, 34 ... Hole, 35 ... Edge, 36 ... O-ring,
41 ... Magnetized pulsar ring, 42 ... Magnetic sensor, 43 ... Stationary side member,
45 ... Rotation side member, 50 ... Inner cylinder, 54 ... Ball, 55 ... Rotation side annular member,
57 ... stationary side annular member, 58 ... seal lip, 60 ... wire harness,
61 ... Outer seal lip, 62 ... Diagonal surface, 63 ... Magnetic sensor,
65 ... Signal processing circuit, 66 ... Magnetized pulsar ring, 70 ... Ball,
74 ... shaft, 76 ... rotating side annular member, 78 ... stationary side annular member,
80, 81 ... seal lip, 82 ... window, 83 ... magnetic ring,
85 ... Magnet, 86 ... Coil, 95, 96 ... Slinger, 98 ... Ring metal,
DESCRIPTION OF SYMBOLS 100 ... Bending part, 101 ... Protruding part, 102 ... Resin part, 103 ... Magnetic sensor,
104 ... Signal line, 105 ... Magnetic ring, 106 ... Seal lip,
115 ... Core metal, 116 ... Slinger, 117 ... Magnetized pulsar ring,
118 ... Seal lip, 120 ... Magnetic sensor, 121 ... Mold part,
122 ... Labyrinth, 123 ... Signal line, 135 ... Core, 136 ... Slinger,
137,138 ... seal lip, 140 ... axial lip,
141 ... second auxiliary lip, 142 ... magnetization pulsar ring, 143 ... magnetic sensor,
145 ... Resin part, 146 ... Inclined surface, 147 ... Harness, 148 ... Signal line,
155 ... Core metal, 156 ... Slinger, 157 ... Magnetized pulsar ring,
158 ... Seal lip, 160 ... Magnetic sensor, 161 ... Resin part,
162,163 ... ring-shaped protrusions, 175 ... slinger, 176 ... core metal,
177 ... Axial through hole, 178 ... Magnetic sensor, 180 ... Seal lip,
181 ... Magnetized pulsar ring, 188 ... Core metal, 191 ... Slinger,
192: Inverted L-shaped bracket, 193 ... Magnetic sensor, 194 ... Resin, 195 ... Signal line,
196 ... hole, 197 ... resin part, 198 ... inner end, 200 ... second auxiliary lip,
201 ... main lip, 202 ... first auxiliary lip, 203 ... magnetized pulsar ring,
205 ... Axial lip, 206 ... Labyrinth, 211 ... Magnetic sensor,
212 ... Magnetized pulsar ring, 215 ... Stationary side member, 216 ... Rotation side member,
220 ... Coating, 221 ... Magnetic pulsar ring, 222 ... Seal lip,
223 ... Core, 231 ... Magnetic pulsar ring, 232 ... Magnetic sensor,
233 ... Core, 234 ... Seal lip, 235 ... Thin film, 236 ... Slinger,
237 ... Resin part, 238 ... Thin film, 240 ... Harness, 248 ... Core metal,
251 ... Seal lip, 252 ... Cover metal fitting, 254 ... Resin,
256 ... Magnetic sensor, 257 ... Signal line, 260 ... Pulsar ring, 265 ... Core metal, 266 ... Slinger, 267 ... Seal lip, 268 ... Cover fitting,
271 ... Magnetized pulsar ring, 272 ... Second auxiliary lip, 273 ... Magnetic sensor,
275 ... resin layer, 276 ... signal wire, 277 ... hole, 278 ... harness,
280 ... resin portion, 285 ... core, 286 ... first slinger,
287 ... second slinger, 288 ... seal lip, 290 ... magnetic sensor,
291 ... resin part, 292 ... signal wire, 293 ... hole, 296 ... annular protrusion,
297 ... Magnetized pulsar ring.

Claims (2)

Relative rotating stationary side of the outer ring (132) and a fixed magnetic ring on the inner ring of the rotating side of the rotary side of the inner ring (131) (142), a magnetic sensor fixed to the stationary side of the outer ring (143) In the wheel speed detection device that detects the relative rotational speed between the outer ring and the inner ring with this magnetic sensor,
The magnetic ring and the magnetic sensor are integrated into a seal device (133) that seals a gap between the inner ring and the outer ring,
The magnetic ring (142) and the magnetic sensor (143) are arranged in the space where the rotation side member (136) and the stationary side member (135) of the sealing device (133) face each other so as to face each other in the radial direction. ,
The sealing device is
A first seal lip (137) including a main lip (137A) and an auxiliary lip (137B) fixed to the stationary side member and in sliding contact with the rotating side member;
An axial lip (140) that is fixed to the rotary side member and extends axially outward from the rotary side member at a radially outer side than the first seal lip and seals a gap between the inner ring and the outer ring. )When,
A second seal lip (141) fixed to the rotating side member and disposed axially outward and radially outward from the first seal lip and the axial lip ;
A resin portion is formed that is fixed to the stationary side member and molds the magnetic sensor with resin, and the second seal lip is slidably in contact with the resin portion axially outward from the magnetic sensor ,
The entire surface of the magnetic sensor is covered with the stationary side member and the resin portion, and the magnetic ring has an entire surface of the rotating side member and a lip extension portion extending from the axial lip. A wheel speed detection device characterized by being covered . The wheel speed detection device according to claim 1,
Wheels characterized in that seal portions (137, 140, 141) of the seal device are provided on both axial sides of the portion where the magnetic ring (142) and the magnetic sensor (143) face each other. Speed detection device.

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