JP2003269477A - Rolling bearing with generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing with a generator having simple structure and easily assembled. <P>SOLUTION: This rolling bearing comprises a pair of relatively rotatable members 2, 3 via a rolling element 4, and the generator 11 that generates electricity by the relative rotation of both the members. Inside a yoke 12 that constitutes the generator 11, an electric circuit 26 using output of the generator 11 is placed. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention includes a generator used as a power source for a rotation detecting device, and a wireless A
The present invention relates to a rolling bearing with a generator used in various applications such as a bearing for a wheel with a BS sensor.

[0002]

As an example of this type of rolling bearing with a generator, as shown in FIG. 17 (A), it is provided at one end of an inner ring 72 which is a fixed side member of the rolling bearing 71. It is known that the stator 74 and the rotor 75 provided at one end of the outer ring 73, which is the rotating side member, constitute the generator 76, and the power generation output of the generator 76 is taken out as a rotation detection signal to the outside. ing. In this case, an electric circuit portion 77 is provided at one end of the inner ring 72, which is the fixed member, extending axially from the installation portion of the stator 74 and outside the end of the inner ring. This electric circuit section 77 is, for example, as shown in FIG.
As shown in FIG. 7 (B), a circuit board 79 is arranged in a metal protective case 78, and electric parts are mounted on the circuit board 79 to form a signal processing circuit, a power supply circuit, a transmission circuit, and the like. Is. The coil 80 of the stator 74 and the electric circuit portion 77 are connected by an electric wiring 81. With such a configuration, the power generation output of the generator 76 is taken out as a rotation detection signal and used by the power supply circuit as a power source for the signal processing circuit and the transmission circuit. The rotation detection signal is wirelessly transmitted by radio waves from the transmission antenna 82 of the transmission circuit. Is transmitted to a separately provided receiving circuit.

However, in such a configuration, the generator 76
It is necessary to separately dispose an electric circuit section 77 including a power supply circuit, a rotation detection signal processing circuit, a transmission circuit, etc. outside the device, which causes a problem that the configuration becomes complicated. In addition, the coil 80 of the generator stator 74 and the electric circuit portion 77
It is necessary to connect the electric wire 81 with the electric wire 81. Since a thin electric wire is used for the winding of the coil 80, it is necessary to carry out wiring after performing end wire processing in order to take it out to the outside.
The work takes time. In addition, since a protective case 78 or the like is required to prevent disconnection of the connection portion due to the electric wiring 81 and to protect the electric circuit portion 77 from the external environment, the configuration is further complicated and the assembly becomes complicated.

FIG. 18 shows another conventional example of a rolling bearing with a generator applied to a bearing device for a wheel. In this example, a stator 84 provided at one end of an outer member 83 that is a fixed member
And the rotor 85 provided on the outer diameter side of the one end of the inner member 82 form a generator 86. The inner member 82 is arranged on the inner peripheral side of the outer member 83 via the double row rolling elements 88. An electric circuit portion 87 similar to that in the example of FIG. 17 is arranged on the outer diameter side of the stator 84. The rotation signal of the generator 86 is
Wireless transmission is performed from the antenna provided in the electric circuit unit 87, and the anti-lock brake system (AB
It is used for S) control and the like. Also in this example, the generator 8
6 and the electric circuit section 87 are installed separately,
It has the same problem as in the case of the configuration of FIG.

An object of the present invention is to provide a rolling bearing with a generator which has a simple structure and is easy to assemble.

[0006]

In order to solve the above-mentioned problems, the rolling bearing with a generator of the present invention generates electric power by a pair of members which are relatively rotatable via rolling elements and a relative rotation of both members. A generator is provided, and an electric circuit that uses the output of the generator is provided inside the yoke that constitutes the generator. According to this configuration, since the electric circuit is arranged inside the yoke, it is not necessary to separately mount the electric circuit on the outside. A protective case, which is required when an electric circuit is separately mounted on the outside, is not necessary, so that it can be made compact. Further, the process of electrically connecting the coil of the generator and the electric circuit becomes easy.
Therefore, the structure is simple and the assembly can be easily performed. The electric wire of the coil can be directly connected to the circuit board of the electric circuit, in which case the end wire treatment of the electric wire is unnecessary. Since the electric wire taken out to the outside can be taken from the circuit board, wiring becomes easy. As the electric circuit,
If a rectifier circuit and an output protection circuit that match the characteristics of the generator are provided and built into the yoke, the generator unit can be used as a stable power supply.

Another rolling bearing with a generator of the present invention is
An inner member and an outer member that are relatively rotatable with respect to each other via rolling elements, and a generator that generates electricity by relative rotation of both members are used, and the output of the generator is used inside the yoke that constitutes the generator. An electric circuit is provided. The present invention is an example applied to a radial bearing, and even in the case of this configuration, the configuration is simple and the assembling can be easily performed as in the above invention.

In the present invention, the generator is constituted by a multi-pole magnet having magnetic poles arranged in a circumferential direction, and a magnetic ring which is a yoke that houses the coil and faces the multi-pole magnet. May be attached to one of the inner member and the outer member, and the magnetic ring may be attached to the other member. When the multi-pole magnet is used as described above, the number of rotations can be detected with high accuracy, and power generation can be performed with small size and high efficiency.

In these inventions, a wireless transmission means for wirelessly transmitting the rotation speed signal output from the generator or the output of the sensor using the generator as a power source may be provided. The electric circuit provided inside the yoke includes any one of a rectification circuit of generated power, a signal processing circuit, and a transmission circuit of wireless transmission means. With this configuration, the detection signal such as the rotation speed signal can be transmitted to the outside of the bearing without fear of disconnection without providing a special power source for wireless transmission.

In these inventions, the electric circuit board provided with the electric circuit may be attached to the coil bobbin of the generator. By mounting the electric circuit board on the coil bobbin in this manner, the electric connection between the generator coil and the electric circuit can be further facilitated.

In these inventions, the electric circuit board provided with the electric circuit may constitute a part of the coil bobbin of the generator. By thus integrating the electric circuit board and the coil bobbin, the axial dimension of the generator can be shortened and the generator can be made compact.

In these inventions, the electric circuit board provided with the electric circuit may have an arc shape or a donut shape. By thus forming an arc shape or a donut shape, the electric circuit can be compactly provided on the coil bobbin so that the electric circuit does not extend to the outer diameter side of the coil bobbin.

In these inventions, the coil bobbin provided with the coil and the electric circuit board may be fitted in the yoke via an elastic material layer made of an elastic adhesive or a mold resin having elasticity. By interposing the elastic material layer, it is possible to prevent the deformation and vibration of the yoke from being directly transmitted to the coil.

In these inventions, an elastic spacer may be interposed between the coil bobbin provided with the coil and the electric circuit board and the inner wall surface of the yoke. This elastic spacer can assist in fixing the electric circuit board in the axial direction.

The bearing for a wheel with a power generator of the present invention uses the rolling bearing with a power generator of any one of the above configurations according to the present invention, and has an outer member having a double row rolling surface on the inner circumference. And an inner member having rolling surfaces facing each of these rolling surfaces and a double row rolling element accommodated between the rolling surfaces to rotatably support the wheels with respect to the vehicle body. I am trying. Wheel bearings are in a severe environment where they are exposed to the road surface, and when wiring for the output and power supply of the rotation detector is performed, the problem of disconnection is likely to occur. In addition, waterproof treatment for muddy water is also required. For this reason, the rolling bearing with a generator of the present invention has an advantage that it has a power generation function while being easy and simple to assemble.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a bearing device for a wheel which is an example of a rolling bearing with a generator according to a first embodiment of the present invention. The fixed member 1 of this wheel bearing device includes an outer member 2 and a knuckle 10. The outer member 2 is a flange 2
It is attached to the knuckle 10 via a. The knuckle 10 is fixed to the vehicle body. The rotating member 7 is an outer ring 15a of the constant velocity universal joint 15 fixed to the inner member 3 and its inner diameter surface.
It is composed of The outer member 2 has a double-row rolling surface 5 on the inner circumference.
Rolling surfaces 6 a and 6 b having a and 5 b and facing the rolling surfaces 5 a and 5 b are provided on the outer periphery of the inner member 3. The inner member 3 is a combination of a hub wheel 3a and another inner ring constituting member 3b. The hub wheels 3a and the inner ring constituting member 3b respectively have the double row rolling surfaces 6a and 6b.
Rolling surfaces 6a and 6b of each row of b are formed.
The double row rolling element 4 is accommodated between the rolling surfaces 5a and 6a and between the rolling surfaces 5b and 6b. The rolling elements 4 are held by the cage 8 for each row. The outer member 2, the inner member 3, the rolling elements 4, and the cage 8 constitute a rolling bearing, and the outer member 2 and the inner member 3 serve as bearing rings. An annular space between the outer member 2 and the inner member 3 is sealed by a seal member 9 on the outer side of the rolling element 4 on the outer side.

The generator 11 is opposed to the inner peripheral side of a magnetic ring 12 which is a yoke accommodating a coil, and the multipolar magnet 1 is provided.
3 is provided. The magnetic ring 12 has a stepped cylindrical surface shape with an outer diameter surface including a small diameter portion and a large diameter portion,
The small diameter portion is fitted to the inner diameter surface of the outer member 2. The magnetic ring 12 serves as the stator of the generator 11. Multi-pole magnet 1
3 is multi-polarized so that the magnetic poles are arranged at equal intervals in the circumferential direction. The multi-pole magnet 13 is attached to the inner member 3 and serves as the rotor of the generator 11 in this embodiment.

As shown in FIG. 3, the magnetic ring 12 is
Two ferromagnetic rings 30a and 30b facing each other in the axial direction
And one other ferromagnetic ring 30c sandwiched between the outer diameters of these rings 30a and 30b. The ferromagnetic rings 30a, 30b, 30c are annular members having the cross-sectional shape shown in FIG.
They are fitted together at 37. Ferromagnetic rings 30a, 3
A plurality of comb-teeth-shaped claws 31a and 31b bent from the side surface portions 32 and 33 to the opposite side surfaces are formed at one end of the 0b. The comb-teeth-shaped claws 31a and 31b are alternately arranged at predetermined intervals in the circumferential direction. The comb tooth-shaped claws 31a and 31b face the multipolar magnet 13 at a predetermined interval to form a claw pole type generator. For the ferromagnetic material rings 30a, 30b, 30c, a magnetic material having rust prevention property such as ferritic stainless steel (JIS standard SUS430 series) is used.

As shown in FIG. 2, a coil 25 wound around a bobbin 24 is housed inside the magnetic ring 12 which is the yoke of the generator 11. Bobbin 24
A groove-shaped ring member whose cross-section is open to the outer diameter side, and a coil 25 is wound inside a groove portion sandwiched by both side walls 24a and 24b. The groove bottom portion 24c of the bobbin 24 has the side wall 2
4b extends in the axial direction to form a protruding cylindrical portion 24ca, and an electric circuit 26 that uses the output of the generator 11 is installed in an annular space surrounded by the side wall 24b and the protruding cylindrical portion 24ca. The coil bobbin 24 is fixed to the magnetic ring member 12 by an elastic material layer 63 (FIG. 5) made of an elastic adhesive or the like, and the elastic material layer 63 causes the axial gap 28 between the bobbin 24 and the magnetic ring 12 and the radial gap. 29 are filled. The elastic material layer 63 may be a mold resin having elasticity. In this way, the coil bobbin 24
Is elastically fixed to the magnetic body ring 12 via the elastic material layer 63, thereby preventing deformation and vibration of the magnetic body ring 12 from being directly transmitted to the coil 25. The electric circuit 26 is
The electric circuit board 27 is formed by mounting electric parts, and the electric circuit board 27 is attached to the side wall 24b of the bobbin 24. FIG. 4 is a sectional view showing the relationship between the ferromagnetic ring 30a, which is one component of the magnetic ring 12, and the coil bobbin 24 attached thereto, and FIG. 5 is an enlarged view thereof. As shown in FIG. 5, the wire 3 of the coil 25
8 is directly connected to the input terminal 39 of the electric circuit board 27. This eliminates the need for end wire treatment such as connecting the electric wire of the coil to another thick electric wire as in the case of the conventional example. The electric circuit board 27 is formed in an arc shape as shown in FIG. 6A so as to be along the side wall 24b of the bobbin 24, or as shown in FIG.
It has a donut shape as shown in FIG. As a result, the electric circuit 26 can be compactly provided on the bobbin 24 so that the electric circuit 26 does not protrude to the outer diameter side of the coil bobbin 24.

As shown in the block diagram of FIG. 7, the electric circuit 26 processes the power generation output of the generator 11 and extracts it as a rotation detection signal, and the rotation detection signal processed by this circuit. And a signal processing circuit 4 for transmitting the power generation output of the generator 11 by wirelessly transmitting as
0 and a power supply circuit 43 that supplies power as a power supply to the transmission circuit 42. The transmission circuit 42 includes an oscillation / modulation circuit. The transmission circuit 42 and the transmission antenna 44 constitute a transmission section 41A of the wireless transmission means 41. The wireless transmission means 41 is composed of the transmission section 41A and the reception section 41B. The reception unit 41B includes a reception antenna 52 and a reception circuit 53 including a tuning / demodulation circuit that tunes and demodulates a received signal. In addition, instead of using the power generation output of the generator 11 for detecting the wheel rotation signal as in the case of this embodiment, a dedicated sensor may be separately provided. The wheel rotation signal received by the receiver 41B is used for controlling the antilock brake system and the like.

The transmitting antenna 44 of the transmitting section 41A is shown in FIG.
As shown in FIG. 5, the magnetic ring 12 is arranged together with another external member 54 on the outer peripheral side of the small diameter portion 30ca of the ferromagnetic ring 30c which is one of the constituent members. This transmitting antenna 44 and the transmitting circuit 42 in the electric circuit 26
Are connected to each other by a wire (not shown) inserted in a small diameter hole penetrating one side surface portion 33 of the magnetic body ring 12. A small diameter hole for inserting a wire in the magnetic body ring side surface portion 33 is waterproofed when the external member 54 provided together with the transmitting antenna 44 is attached, so that the muddy water enters the magnetic body ring 12 from the outside through the small diameter hole. Etc. are prevented from entering.

FIG. 8 shows an example of the power supply circuit 43. The current generated by the generator 11 is rectified and smoothed by the rectifier circuit 47 and the smoothing capacitor 48, and is output from the power supply output terminal VCC via the diode 49. Diode 4
A supercapacitor 50 is provided between the positive power supply output terminal VCC and the ground terminal GND in a stage subsequent to 9. A parallel circuit 51 of a diode and a resistor is interposed between the positive side of the supercapacitor 50 and the output power supply terminal VCC.

As shown in FIG. 2, the multi-pole magnet 13 is composed of a multi-pole magnet member 16 and an annular core metal 17. The magnet member 16 is, for example, a rubber magnet and is vulcanized and bonded to the core metal 17. When the cored bar 17 is provided, the cored bar 17 is a magnetic body,
In particular, it is desirable to use a ferromagnetic material. The core metal 17 may be an annular member having an L-shaped cross section or an annular member having a concave cross-section. The annular core metal 17 is fitted and fixed to the outer diameter surface of the inner member 3 in an interference fit state. The multi-pole magnet 13 may be formed of a plastic magnet or a sintered magnet, or may be attached to the outer diameter surface of the inner member 3 with an adhesive or the like. When the multi-pole magnet 13 is a plastic magnet or a sintered magnet, the core metal 17 does not necessarily have to be provided.

A seal member 18 is mounted on the inner peripheral side of the small-diameter portion 30ca of the ferromagnetic ring 30c, which is a component of the magnetic ring 12. The seal member 18 is formed by joining and integrating a seal 20 made of an elastic material with a cored bar 19. The cored bar 19 has an L-shaped cross section.
The seal 20 has a lip. The number of lips may be arbitrary, but in the example shown in the figure, one radial lip 21 and two lips 2 are used.
Two side lips 22 are provided. A slinger 23 serving as a seal contact portion is provided on the rotary member 7 so as to face the seal member 18. The slinger 23 is made of stainless steel.

The operation of the above configuration will be described. The power generation output of the generator 11 is input to the electric circuit 26 provided in the magnetic body ring 12 which is the generator yoke, and the signal processing circuit 4 thereof is provided.
It is taken out as a rotation detection signal by 0. Further, the power generation output of the generator 11 is also input to the power supply circuit 43, rectified and smoothed, and supplied as the power supply of the signal processing circuit 40 and the transmission circuit 42. The rotation detection signal thus obtained is transmitted as a radio wave from the transmission circuit 42 through the transmission antenna 44 to the reception unit 41.
Sent to B.

In the power supply circuit 43, since the supercapacitor 50 is incorporated as a charging circuit, the generated power is charged when the rotating member 7 rotates at a high speed, and the rotating member 7 rotates at a low speed to generate the generated power as a power supply. When it becomes insufficient, by supplying charging power as a power source, it is possible to compensate for the power shortage at low speed rotation. FIG. 9A shows the charging operation at high speed rotation, and FIG. 9B shows the discharging operation at low speed rotation. That is, at the time of high speed rotation, the generated voltage is rectified and smoothed by the rectifier circuit 47 and the smoothing capacitor 48 into a DC voltage, and the DC voltage is supplied as a power source, and a part of the DC voltage is as shown in FIG. Parallel circuit 5
The supercapacitor 50 is charged through the resistance of 1.
When rotating at low speed, electric power is supplied from the supercapacitor 50 through the diode of the parallel circuit as shown in FIG. 9B. In this way, it is possible to reliably transmit the rotation detection signal even at low speed rotation when the generated power is insufficient.

In particular, in this embodiment, since the electric circuit 26 that uses the output of the generator 11 is provided inside the magnetic ring 12 that is the yoke of the generator 11, the coil 25 and the electric circuit 26 of the generator 11 are provided. The process of electrically connecting and is not necessary, and no special measures for preventing the disconnection of the wiring and a protective case for protecting the electric circuit 26 from the external environment are required, and the structure is simple and the assembly is easy. it can. Moreover, the electric circuit board 27 provided with the electric circuit 26 has the electric generator 1
Since it is attached to the first coil bobbin 24, the electrical connection between the generator coil 25 and the electric circuit 26 can be further facilitated.

Further, since the generator 11 is composed of the multi-pole magnet 13 in which the magnetic poles are arranged in the circumferential direction and the magnetic ring 12 containing the coil 25, the multi-pole makes it possible to detect the rotational speed with high accuracy. In addition, it is compact and enables efficient power generation. The magnetic ring 12 has many magnetic pole claws 31a, 3a.
Since it is a claw pole type having 1b, it is possible to obtain the effect of improving the rotation detection accuracy by further increasing the number of poles together with the use of the multipole magnet 13.

Further, a wireless transmission means 41 for wirelessly transmitting a wheel rotation speed signal output from the generator 11 or an output of a rotation sensor using the generator 11 as a power source is provided, and a magnetic material ring 12 serving as a generator yoke is provided. The electric circuit 26 provided inside includes a rectifying circuit 47 for the generated power, a signal processing circuit 40, and a transmitting circuit 42 of the wireless transmitting means 41.
Therefore, the wheel rotation speed signal can be transmitted to the outside of the bearing without fear of disconnection, without providing a special power source for wireless transmission.

10 to 16 show various modifications of the mounting structure for mounting the electric circuit 26 on the coil bobbin 24. Any of these modifications can be applied to the first embodiment. In the example of FIG. 10, the protrusion 55 for fixing the circuit board is provided on the outer peripheral side of the protruding cylindrical portion 24ca of the bobbin 24. The protrusion 55 fixes the electric circuit board 27 arranged along the bobbin side wall 24b in the axial direction.

In the example of FIG. 11, an engaging claw 56 for fixing the circuit board is provided on the outer diameter side end of the side wall 24b of the bobbin 24, and the electric circuit board 27 attached to the bobbin side wall 24b by the engaging claw 56. It is fixed in the axial direction. The engaging claw 56 is formed from the outer diameter side end of the side wall 24b to the electric circuit board 2
7 extends in the axial direction by a thickness of about 7, and the tip projects toward the inner diameter side.

In the example of FIG. 12, a notch 57 for positioning is provided at a part of the inner diameter end of the electric circuit board 27, and a rotation preventing projection 58 corresponding to the notch 57 is provided at the base end of the side wall 24b of the bobbin 24. It is provided. Notch 57 in protrusion 58
By engaging with, the electric circuit board 27 is positioned in the rotational direction.

In the example of FIG. 13, the electric circuit board 27 is provided with a fixing engagement hole 59, and the side wall 24b of the bobbin 24 is provided with a positioning projection 60 corresponding to the engagement hole 59.
By engaging the engagement hole 59 with the protrusion 60, the electric circuit board 27 is positioned in the rotational direction and fixed in the axial direction at the same time.

In the example of FIG. 14, one side wall 24b of the bobbin 24 in the first embodiment is omitted, and a donut-shaped electric circuit board 27 is used instead of the side wall 24b. In other words, the electric circuit board 27 constitutes a part of the bobbin 24. In this case, the protruding cylindrical portion 2 of the bobbin 24
The electric circuit board 27 is fixed to the bobbin 24 by the protrusion 61 provided on the outer periphery of the 4ca and the side surface of the coil 25. As described above, by substituting the side wall 24b of the bobbin 24 with the electric circuit board 27, the overall axial dimension of the generator 11 can be shortened.

In the example of FIG. 15, the side wall 24b of the bobbin 24 is provided.
The wiring pattern of the electric circuit 26 is directly formed on the side wall, and electric parts are mounted on the side wall 24b to form the electric circuit 26. That is, the bobbin side wall 24b is used as the electric circuit board 27. As a result, the overall axial dimension of the generator 11 can be shortened.

In the first embodiment, the example of FIG. 16 is
When assembling the magnetic ring 12 by combining the three ferromagnetic rings 30a, 30b, 30c, a spacer 62 made of an elastic material is provided between the electric circuit board 27 and the side surface portion 33 of the magnetic ring 12 in the circumferential direction. It is arranged at several places to assist in fixing the electric circuit board 27 in the axial direction. In this case, on the surface of the electric circuit board 27, a region where the spacer 62 is arranged is provided with a region where no electric component is mounted.

In each of the above embodiments, the electric circuit 26
The example in which the whole is installed in the magnetic body ring 12 which is the generator yoke has been described. It may be provided outside the ring 12. For example, the high-frequency circuit unit and the transmitting antenna 44 are arranged on the outer peripheral side of the small diameter portion 30ca of the ferromagnetic ring 30c forming the magnetic ring 12. The power supply circuit 43 and the signal processing circuit 40 that do not require adjustment are installed in the magnetic body ring 12. With this configuration, the generator unit with a built-in power supply circuit can be used not only for wireless transmission but also for other purposes.

[0038]

The rolling bearing with a generator of the present invention comprises a pair of members which are rotatable relative to each other via rolling elements, and a generator which generates power by the relative rotation of both members, and constitutes the above-mentioned generator. Since the electric circuit that uses the output of the generator is provided inside the yoke, it is not necessary to separately mount the electric circuit on the outside, and the configuration is simple and the assembly is easy. If the transmission circuit of the wireless transmission means is built in the yoke, only the transmitting antenna needs to be output to the outside of the yoke.
It has a simple structure while having a wireless transmission function.
When the electric circuit board provided with the electric circuit is fixed inside the yoke together with the coil, the yoke serves as a protective case for the circuit, and protection from muddy water and vibration can be performed integrally with the coil. Becomes simple. In particular, when the present invention is applied to a wheel bearing device, an effect that the structure of the rolling bearing with a generator of the present invention is simple and easy to assemble against various severe conditions required for the wheel bearing device, Effectively demonstrated.

[Brief description of drawings]

FIG. 1 is a sectional view of a rolling bearing with a generator according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the generator.

3A and 3B are a cross-sectional view and a front view of a magnetic ring in the generator, respectively.

FIG. 4 is a cross-sectional view showing the relationship between one component member of the magnetic ring and the coil bobbin.

5 is a partially enlarged sectional view of FIG.

6A and 6B are plan views showing respective examples of electric circuit boards provided in the generator.

FIG. 7 is a block diagram showing a configuration of a generator and an electric circuit provided in the generator.

FIG. 8 is a circuit diagram showing an example of a power supply circuit in the electric circuit.

9A and 9B are explanatory diagrams showing a charging operation and a discharging operation of the power supply circuit, respectively.

FIG. 10 is a sectional view showing another example of a structure for attaching an electric circuit to a coil bobbin.

FIG. 11 is a sectional view showing still another example of a structure for attaching an electric circuit to a coil bobbin.

12A and 12B are a sectional view and a partial front view showing still another example of a structure for attaching an electric circuit to a coil bobbin.

13 (A) and 13 (B) are a sectional view and a partial front view, respectively, showing still another example of a structure for attaching an electric circuit to a coil bobbin.

FIG. 14 is a sectional view showing still another example of a structure for attaching an electric circuit to a coil bobbin.

FIG. 15 is a sectional view showing still another example of a structure for mounting an electric circuit on a coil bobbin.

FIG. 16 is a cross-sectional view showing still another example of a structure for attaching an electric circuit to a coil bobbin.

17A is a cross-sectional view of a conventional example, and FIG. 17B is a cross-sectional view showing details of an electric circuit portion in FIG.

FIG. 18 is a cross-sectional view showing another conventional example.

[Explanation of symbols]

2 ... Outer member 3 ... Inner member 4 ... rolling elements 5a, 5b, 6a, 6b ... Rolling surface 11 ... Generator 12 ... Magnetic ring 13 ... Multi-pole magnet 24 ... Bobbin 25 ... Coil 26 ... Electric circuit 27 ... Electric circuit board 40 ... Signal processing circuit 41 ... Wireless transmission means 42 ... Transmission circuit 47 ... Rectifier circuit 62 ... Spacer

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) H02K 5/173 H02K 5/173 A 5H622 B 11/00 21/14 H 21/14 11/00 X (72) Inventor Toru Takahashi 1578 Higashi-Kaizuka, Iwata-shi, Shizuoka Entien Co., Ltd. (72) Inventor Hiroaki Ohba 1578 Higashi-Kaizuka, Iwata-shi, Shizuoka F-Term (reference) 3J101 AA02 AA32 AA43 AA54 AA62 AA77 GA23 FA26 FA26 GA02 GA02 AA08 BB05 BB10 BB14 CC01 CC04 CC19 DB01 DB16 DB18 5H605 AA08 BB01 BB10 CC01 CC04 CC09 DD16 EB10 EB18 EB33 FF06 GG01 GG18 5H611 AA01 BB02 BB06 PP05 QQ01 RR01 TT01 TT03 UA01 UB00 UB02 5H621 BB07 BB08 GA07 GB08 HH01 JK08 JK15 5H622 CA05 CA10 DD01 DD04 DD05 PP03 PP19

Claims (10)

[Claims] 1. A pair of members, which are relatively rotatable with respect to each other via rolling elements, and a generator, which generates electric power by relative rotation of both members. An output of the generator is provided inside a yoke constituting the generator. A rolling bearing with a generator, which is provided with an electric circuit to be used. 2. An inner member and an outer member that are relatively rotatable with respect to each other via rolling elements, and a generator that generates electricity by relative rotation of both members, and a power generator is provided inside a yoke that constitutes the generator. A rolling bearing with a generator, which is provided with an electric circuit that uses the output of the machine. 3. The generator comprises a multi-pole magnet having magnetic poles arranged in a circumferential direction, and a magnetic ring that is a yoke that accommodates the coil and faces the multi-pole magnet. The rolling bearing with a generator according to claim 2, wherein the rolling bearing is attached to one of the square member and the outer member, and the magnetic ring is attached to the other member. 4. A wireless transmission means for wirelessly transmitting a rotation speed signal output from a generator or an output of a sensor using the generator as a power source, and an electric circuit provided inside the yoke is configured to generate a generated current. Rectifier circuit, signal processing circuit,
4. The rolling bearing with a generator according to claim 1, further comprising any one of a transmission circuit of the wireless transmission means. 5. The rolling bearing with a generator according to claim 1, wherein the electric circuit board provided with the electric circuit is attached to a coil bobbin of the generator. 6. An electric circuit board provided with the electric circuit,
The rolling bearing with a generator according to any one of claims 1 to 4, which constitutes a part of a coil bobbin of the generator. 7. The rolling bearing with a generator according to claim 5, wherein the electric circuit board provided with the electric circuit has an arc shape or a donut shape. 8. A coil bobbin provided with a coil and an electric circuit board is provided in a fitted state in a yoke through an elastic material layer made of an elastic adhesive or a mold resin having elasticity. A rolling bearing with a generator according to any one of the above. 9. The rolling bearing with a generator according to claim 5, wherein an elastic spacer is interposed between the coil bobbin provided with the coil and the electric circuit board and the inner wall surface of the yoke. 10. The rolling bearing with a generator according to claim 1, wherein the outer member has a double row rolling contact surface on the inner periphery, and these rolling contact surfaces face each other. A bearing for a wheel with a generator, which includes an inner member having a rolling surface and a double row rolling element housed between the rolling surfaces and rotatably supports the wheel with respect to the vehicle body.