CN101243310B - Sensor-equipped bearing for wheel - Google Patents

Abstract

A bearing for a vehicle, enabling a load sensor to be compactly installed on the vehicle and capable of detecting a load on a wheel with good sensitivity. A ring member (22) is attached to a circumferential surface or an end surface of a stationary member out of an outer member (1) and an inner member (2). The ring member (22) has at an intermediate section of it a first contactless ring section (22b (22f, 22i)) not in contact with the stationary member, has at one end a first contact ring section (22a (22g)) in contact with the stationary member, and has at the other end the following (A) or (B): (A) a second contactless ring section (22c(22d)) having greater wall thickness than the first contactless ring section (22b); (B) a second contact ring section (22e, (22h)) in contact with the stationary member. In (A), a sensor (23) for measuring strain of the ring member (22) is installed on the first contactless ring section (22b), and in (B), the sensor (23) is installed on the first contactless ring section (22f) or first contact ring section (22g) having the smallest wall thickness.

Description

The wheel bearing that has sensor

Technical field

The present invention relates to the wheel bearing that have sensor of built-in detection effect in the load transducer of the load of the bearing portion of wheel.

Background technology

In the past, for the safety traffic of automobile, on wheel bearing, the sensor of the rotational speed that detects each wheel is set.The driving safety insure measures of the general automobiles in past is undertaken by the rotational speed of the wheel of detection each several part, but,, be not enough only by the rotational speed of wheel, requirement can be adopted other sensor signal, further carries out the control of secure context.

So people also consider to seek ability of posture control according to the load that acts on each wheel when vehicle '.Such as, when turning round, the bigger load of effect on outboard wheels, in addition, when the face of tilting travelled, on single wheel, in the occasion of braking, it is first-class that load is displaced to front-wheel respectively, and the load that acts on each wheel is unequal.In addition, in the unequal occasion of loading load, the load that acts on each wheel is unequal equally.Thus, if the load of detection effect on wheel at any time is then according to this testing result, by prior control suspension etc., ability of posture control in the time of can carrying out vehicle ' (rolling when turning round prevents, the front-wheel when braking sinks prevents, the unequal sinking that causes of loading load prevent etc.).But, do not have the load of detection effect on wheel sensor be fit to the position is set, be difficult to the ability of posture control that realizes that load detects.

In addition, if from now on, import front-wheel electrical steering (steering by wire), form the system that mechanically axletree is not connected with manoeuvre portion (steering), then require inspection vehicle direction of principal axis load, information of road surface is passed to the bearing circle that human pilot holds.

As the measure of the such demand of reply, people propose to have on the outer ring of wheel bearing to paste deformeter, the wheel bearing of detection distortion (such as, patent documentation 1).

Patent documentation 1: Japanese Unexamined Patent Application Publication 2003-530565 communique

The outer ring of wheel bearing is for having rolling surface, and the parts of desired strength are the parts of bearings of producing through the complicated step of plastic working, turning processing, thermal treatment, attrition process etc.For this reason, as patent documentation 1, paste the occasion of deformeter on the outer ring, it is poor to have productivity, the problem that the cost during batch process is high.In addition, be difficult to detect the distortion of outer ring according to good sensitivity.

So people attempt on the side face of outer ring endless member being installed, and on this endless member deformeter are installed, and seek productive raising.But,, still unresolved for the problem that detects the distortion of outer ring with good sensitivity.

Summary of the invention

The object of the present invention is to provide a kind of wheel bearing that has sensor, it can be provided with the sensor that load detects usefulness compactly on vehicle, the load of sensitivity detection effect on wheel that can be good, and the cost during batch process is low.

The wheel bearing that has sensor of the present invention relates to a kind of wheel bearing, and its week that included forms foreign side's parts of many row's rolling surfaces; Form the interior quadrate part spare of the rolling surface of facing with the rolling surface of these foreign side's parts; Jie is located at the many rows rolling body between two rolling surfaces; Sealing mechanism with the end seal between above-mentioned foreign side parts and the interior quadrate part spare, rotatably with wheel support on car body, endless member is installed on the side face or end face of the fixation side parts in above-mentioned foreign side parts and the interior quadrate part spare, this endless member is at pars intermedia, has the 1st noncontact annulus that does not contact with the fixation side parts, a side have contact with the fixation side parts the 1st the contact annulus, opposite side have following (A) and (B) in any one.(A) refer to the 2nd noncontact annulus of its wall thickness greater than above-mentioned the 1st noncontact annulus; (B) the 2nd contact annulus that refers to contact with the fixation side parts; Occasion at above-mentioned (A), at above-mentioned the 1st noncontact annulus, the sensor of the distortion of measuring endless member is set, in the occasion of above-mentioned (B), at the 1st noncontact annulus or the 1st contact annulus that wall thickness is set with minimum degree, the sensor of the distortion of measuring endless member is set.

If escort vehicle travels, load action then passes through rolling body on the rotation side component, the fixation side part distortion, and this distortion makes the endless member distortion.Be arranged at the distortion of the sensor endless member on the endless member.If in advance by experiment, simulation and calculate relation between distortion and the load then can be according to the output of sensor, the load of detection effect on wheel etc.That is, can infer the external force that acts on the wheel bearing by the output of the sensor, or the acting force between tire and the road surface, or the precompressed amount of wheel bearing.In addition, the load that this can have been detected etc. is used for the vehicle control of automobile.

Have in the wheel bearing of sensor at this, because sensor is installed on the endless member on the side face that is installed in the fixation side parts, so load transducer can be set on vehicle compactly.Because endless member is the simple parts that are installed on the fixation side parts, so by sensor is mounted thereon, the property produced in batches is good, can seek the reduction of cost.

The sensor that mensuration is arranged at the distortion of the annulus on above-mentioned the 1st noncontact annulus also can be the sensor of the axial distortion of measuring above-mentioned endless member.In occasion,, be difficult to distortion so rigidity is high because the 2nd noncontact annulus is the heavy section of its wall thickness greater than the 1st noncontact annulus with above-mentioned (A).So the radial deformation that is deformed into the fixation side parts that produces between this heavy section and the 1st contact annulus shifts, and the distortion that its amplification is formed.In addition, in the occasion with above-mentioned (B), the 1st contact annulus contact annulus with the 2nd wall thickness is greater than the 1st noncontact annulus, and its rigidity is high and be difficult to be out of shape, and the low and easy deformation of the rigidity of the 1st noncontact annulus.So, at the 1st noncontact annulus, produce axial distortion, still, this is deformed into the axial deformation of fixation side parts is shifted, and the distortion that its amplification is formed.Thus, by being arranged at the sensor on the 1st noncontact annulus, sensitivity that can be good detects the distortion of fixation side parts, can improve accuracy of detection.

Above-mentioned the 2nd noncontact annulus also can be by forming along the radially outstanding flange portion opposite with above-mentioned the 1st contact annulus.Because in the 1st and the 2nd noncontact annulus, away from the 2nd noncontact annulus of the 1st contact annulus like this, forms, so the rigidity of this flange portion height and be difficult to be out of shape by flange portion.So this flange portion contacts the radial deformation that is deformed into the fixation side parts that produces between the annulus and shifts with the 1st, and the distortion that its amplification is formed.

Thus, sensitivity that can be good detects the distortion of fixation side parts, can improve accuracy of detection.

The sensor that mensuration is arranged at the distortion of the annulus on above-mentioned the 1st contact annulus also can be the diastrophic sensor of mensuration.The 1st contact annulus of wall thickness is followed the distortion of fixation side parts and is out of shape, and still, the rigidity of the 2nd contact annulus and the 1st noncontact annulus is high and be difficult to distortion.So the 1st contact annulus of wall thickness produces flexural deformation, still, this is deformed into the axial deformation of the side face of fixation side parts is shifted, and the distortion that its amplification is formed.Thus, can be by the sensor on the 1st contact annulus that is arranged at wall thickness, the distortion with good sensitivity detection fixation side parts improves accuracy of detection.

Best, plastic yield does not take place in above-mentioned endless member to the press fit of fixation side parts the time.Particularly best, even in the external force that acts on the wheel bearing, or under the peaked situation of the expectation of the acting force between tire and the road surface, plastic yield does not still take place in above-mentioned endless member, or between itself and said fixing side component, very close to each other.

Plastic yield does not take place when press fit etc. in endless member, in addition, even under the peaked situation of each acting force of the expectation of external force that acts on wheel bearing etc., still do not produce plastic yield, if between itself and fixation side parts, do not produce the gap, then the distortion of fixation side parts correctly passes to endless member, and sensitivity that can be good detects the distortion of fixation side parts.

Above-mentioned endless member can be the punch process part.By adopting the punch process part, can seek the reduction of cost.

In the present invention, best, above-mentioned sealing mechanism is set on above-mentioned endless member.Like this, because sealing mechanism is set on endless member, the core iron of endless member double as sealing mechanism thus, can make the wheel bearing that has sensor compact vertically, but and low price ground have sealing function, seek the further reduction of cost.

Also can be at above-mentioned the 2nd noncontact annulus by the occasion that forms along the radially outstanding flange portion opposite with above-mentioned the 1st contact annulus, above-mentioned endless member is installed on the end face of said fixing side component, measures the deformation-sensor of the sensor of above-mentioned distortion for the axial distortion of the above-mentioned endless member of mensuration.

In the present invention, also can form like this, promptly, above-mentioned endless member is installed on the end face of said fixing side component, the sensor of measuring above-mentioned distortion is installed on above-mentioned the 1st noncontact annulus of above-mentioned (A) occasion, and this sensor is the deformation-sensor of the axial distortion of the above-mentioned endless member of mensuration.

In the present invention, also can form like this, promptly, above-mentioned endless member is installed on the end face of said fixing side component, the sensor of measuring above-mentioned distortion is installed on above-mentioned the 1st noncontact annulus of above-mentioned (B) occasion, and this sensor is for measuring the diastrophic deformation-sensor of above-mentioned endless member.

In the present invention, also can form like this, promptly, above-mentioned endless member is installed on the end face of said fixing side component, the sensor of measuring above-mentioned distortion is installed on above-mentioned the 1st contact annulus of above-mentioned (B) occasion, and this sensor is the deformation-sensor of the axial distortion of the above-mentioned endless member of mensuration.

As described above, be installed on the side face of said fixing side component and the occasion on the end face in the end face at above-mentioned endless member, the rigidity of the end face of fixation side parts thus, moderate finite deformation occurs because of other the part of wall thickness less than the fixation side parts.So the distortion of fixed part passes to endless member or sensor installing component, by deformation-sensor, it is measured, thus, sensitivity that can be good detects the distortion of fixation side parts.

In addition, around the end face of fixation side parts, other parts are few, have the space of broad.Thus, the design freedom height of endless member or sensor installing component, these parts can be the shape that is suitable for detecting with good sensitivity the distortion of fixation side parts.In addition, it is installed easily.

In addition, by in each mounting portion, be provided with and measure axial distortion or diastrophic deformation-sensor, sensitivity that can be good detects the radial deformation of fixation side parts.

In the present invention, also can in the sensor, on the surface of above-mentioned endless member, dielectric film be set, on this dielectric film, form the resistive element of the distortion of measuring above-mentioned endless member by surface treatment.

In the present invention, also can form like this, promptly, in the sensor of measuring above-mentioned distortion, surface at above-mentioned the 1st noncontact annulus of above-mentioned (A) occasion is provided with dielectric film, on this dielectric film, form the resistive element of the distortion of measuring above-mentioned endless member by surface treatment, this sensor is the deformation-sensor of the axial distortion of measuring above-mentioned endless member.

Contact the occasion that the opposite radially outstanding flange portion of annulus forms at above-mentioned the 2nd noncontact annulus by edge and the above-mentioned the 1st, also can be in the sensor of measuring above-mentioned distortion, on the surface of above-mentioned the 1st noncontact annulus, dielectric film is set, on this dielectric film, form the resistive element of the distortion of measuring above-mentioned endless member by surface treatment, this sensor is the deformation-sensor of the axial distortion of measuring above-mentioned endless member.

In the present invention, also can be in the sensor of measuring above-mentioned distortion, on the surface of above-mentioned the 1st noncontact annulus of above-mentioned (B) occasion, dielectric film is set, on this dielectric film, form the resistive element of the distortion of measuring above-mentioned endless member by surface treatment, this sensor is the deformation-sensor of the axial distortion of measuring above-mentioned endless member.

In the present invention, also can be in the sensor of measuring above-mentioned distortion, above-mentioned (B) occasion above-mentioned the 1st the contact annulus the surface on dielectric film is set, on this dielectric film, form the resistive element of the distortion of measuring above-mentioned endless member by surface treatment, this sensor is for measuring the diastrophic deformation-sensor of above-mentioned endless member.

As described above, on the sensor installing component that is installed on the fixation side parts, the occasion of the resistive element that the installation deformation detection is used can be provided with load transducer compactly on vehicle.Because the sensor installing component is the simple parts that are installed on the fixation side parts, so by resistive element is installed thereon, the property produced in batches is good, can seek the reduction of cost.

In addition, as described above, as deformation detection mechanism, do not adopt the deformation-sensor of manufactured goods, and the resistive element that deformation detection is used is set being located on the lip-deep dielectric film of sensor installing component, constitute the occasion of deformation detection mechanism at it, but low price ground makes sensor module.If cover around resistive element surface and its by coverlay, because resistive element is firmly fixed on the sensor installing component, so resistive element does not break away from, or occurrence positions is not offset, the reliability height that measuring ability is kept.

Description of drawings

Explanation according to reference to the accompanying drawings following preferred embodiment can be expressly understood the present invention more.But embodiment and accompanying drawing are used for simple diagram and explanation, shall not be applied to and determine scope of the present invention.Scope of the present invention is determined by the scope of accompanying Claim.In the accompanying drawings, the same parts label in a plurality of accompanying drawings is represented same part.

The key diagram that Fig. 1 represents for the mode that the block scheme according to the surface structure of the cut-open view of the wheel bearing that has sensor that will the 1st embodiment of the present invention and its detection system makes up;

Fig. 2 is the foreign side's parts of the above-mentioned wheel bearing that has a sensor of expression and the cut-away section front view of sensor module;

Fig. 3 (a) is the transverse sectional view of the sensor assembly, and Fig. 3 (b) is the enlarged drawing of its major part;

Fig. 4 is the cut-open view of the wheel bearing that has sensor of the 2nd embodiment of the present invention;

Fig. 5 is the foreign side's parts of the above-mentioned wheel bearing that has a sensor of expression and the cut-away section front view of sensor module;

Fig. 6 (a) is the transverse sectional view of the sensor assembly, and Fig. 6 (b) is the enlarged drawing of its major part;

The key diagram that Fig. 7 represents for the mode that the block scheme according to the surface structure of the cut-open view of the wheel bearing that has sensor that will the 3rd embodiment of the present invention and its detection system makes up;

Fig. 8 is the foreign side's parts of the above-mentioned wheel bearing that has a sensor of expression and the cut-away section front view of sensor module;

Fig. 9 (a) is the transverse sectional view of the sensor assembly, and Fig. 9 (b) is the enlarged drawing of its major part;

Figure 10 is the cut-open view of the wheel bearing that has sensor of the 4th embodiment of the present invention;

Figure 11 is the foreign side's parts of the above-mentioned wheel bearing that has a sensor of expression and the cut-away section front view of sensor module;

Figure 12 (a) is the transverse sectional view of the sensor assembly, and Figure 12 (b) is the enlarged drawing of its major part;

Figure 13 is for according to the key diagram that the mode of the block scheme combination of the surface structure of the cut-open view of the wheel bearing that has sensor of application example of the present invention and its detection system is represented;

Figure 14 is the foreign side's parts of the above-mentioned wheel bearing that has a sensor of expression and the cut-away section front view of sensor module;

Figure 15 (a) is the transverse sectional view of the sensor assembly, and Figure 15 (b) is the enlarged drawing of its major part;

Figure 16 is the cut-open view of the wheel bearing that has sensor of the 5th embodiment of the present invention;

Figure 17 is the cut-open view of the wheel bearing that has sensor of the 6th embodiment of the present invention;

Figure 18 is the cut-open view of the wheel bearing that has sensor of the 7th embodiment of the present invention;

Figure 19 is the cut-open view of the wheel bearing that has sensor of the 8th embodiment of the present invention;

Figure 20 is the cut-open view of the wheel bearing that has sensor of the 9th embodiment of the present invention;

Figure 21 is the foreign side's parts of watching the above-mentioned wheel bearing that has a sensor from the inboard and the figure of sensor module;

Figure 22 (a) is the transverse sectional view of the sensor assembly, and Figure 22 (b) is the enlarged drawing of its major part;

Figure 23 is the cut-open view of the wheel bearing that has sensor of the installation method of the different sensor module of expression;

Figure 24 is the cut-open view of the wheel bearing that has sensor of the installation method of the another different sensor module of expression;

Figure 25 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor different with the 9th embodiment;

Figure 26 is the cut-open view of the wheel bearing that has sensor of the installation method of the different sensor module of expression;

Figure 27 is the cut-open view of the wheel bearing that has sensor of the installation method of the another different sensor module of expression; , spindle to thickness.

Figure 28 is the cut-open view of the wheel bearing that has sensor of the 10th embodiment of the present invention;

Figure 29 is the foreign side's parts of watching the above-mentioned wheel bearing that has a sensor from the inboard and the figure of sensor module;

Figure 30 (a) is the transverse sectional view of the sensor assembly, and Figure 30 (b) is the enlarged drawing of its major part;

Figure 31 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor different with the 10th embodiment;

Figure 32 is the cut-open view of the wheel bearing that has sensor of the 11st embodiment of the present invention;

Figure 33 is the foreign side's parts of watching the above-mentioned wheel bearing that has a sensor from the inboard and the figure of sensor module;

Figure 34 (a) is the transverse sectional view of the sensor assembly, and Figure 34 (b) is the enlarged drawing of its major part;

Figure 35 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor different with the 11st embodiment;

Figure 36 is the cut-open view of the wheel bearing that has sensor of the 12nd embodiment of the present invention;

Figure 37 is the foreign side's parts of watching the above-mentioned wheel bearing that has a sensor from the inboard and the figure of sensor module;

Figure 38 (a) is the transverse sectional view of the sensor assembly, and Figure 38 (b) is the enlarged drawing of its major part;

Figure 39 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor different with the 12nd embodiment;

Figure 40 is the cut-open view of the wheel bearing that has sensor of the 13rd embodiment of the present invention;

Figure 41 is the foreign side's parts of the above-mentioned wheel bearing that has a sensor of expression and the cut-away section front view of sensor module;

Figure 42 (a) is the transverse sectional view of the major part of the sensor assembly, and Figure 42 (b) is the enlarged drawing of its major part;

Figure 43 (a) is the major part front view of the sensor assembly, and Figure 43 (b) is its backplan;

Figure 44 (a) is the front view of the major part of different sensor module, and Figure 44 (b) is its backplan;

Figure 45 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor different with the wheel bearing that has sensor shown in Figure 40;

Figure 46 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor further different with the wheel bearing that has sensor shown in Figure 40;

Figure 47 is the cut-open view of the wheel bearing that has sensor of the 14th embodiment of the present invention;

Figure 48 is the foreign side's parts of the above-mentioned wheel bearing that has a sensor of expression and the cut-away section front view of sensor module;

Figure 49 (a) is the transverse sectional view of the major part of the sensor assembly, and Figure 49 (b) is the enlarged drawing of its major part;

Figure 50 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor different with the wheel bearing that has sensor shown in Figure 47;

Figure 51 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor further different with the wheel bearing that has sensor shown in Figure 47;

Figure 52 is the cut-open view of the wheel bearing that has sensor of the 15th embodiment of the present invention;

Figure 53 is the foreign side's parts of the above-mentioned wheel bearing that has a sensor of expression and the cut-away section front view of sensor module;

Figure 54 (a) is the transverse sectional view of the major part of the sensor assembly, and Figure 54 (b) is the enlarged drawing of its major part;

Figure 55 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor different with the wheel bearing that has sensor shown in Figure 52;

Figure 56 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor further different with the wheel bearing that has sensor shown in Figure 52;

Figure 57 is the cut-open view of the wheel bearing that has sensor of the 16th embodiment of the present invention;

Figure 58 is the foreign side's parts of the above-mentioned wheel bearing that has a sensor of expression and the cut-away section front view of sensor module;

Figure 59 (a) is the transverse sectional view of the major part of the sensor assembly, and Figure 59 (b) is the enlarged drawing of its major part;

Figure 60 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor different with the wheel bearing that has sensor shown in Figure 57;

Figure 61 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor further different with the wheel bearing that has sensor shown in Figure 57;

Figure 62 is the cut-open view of the wheel bearing that has sensor of the form 2 of application example of the present invention;

Figure 63 is the foreign side's parts of watching the above-mentioned wheel bearing that has a sensor from the inboard and the figure of sensor module;

Figure 64 is the transverse sectional view of the sensor assembly;

Figure 65 is the cut-open view of the different wheel bearing that has sensor of the form 2 of the installation position of sensor module and application example;

Figure 66 is the cut-open view of the wheel bearing that has sensor of the form 3 of application example of the present invention;

Figure 67 is the foreign side's parts of watching the above-mentioned wheel bearing that has a sensor from the inboard and the figure of sensor module;

Figure 68 (a) is the front view of the sensor assembly, and Figure 68 (b) is its backplan;

Figure 69 is the cut-open view of the different wheel bearing that has sensor of the form 3 of the installation position of sensor module and application example;

Figure 70 is the cut-open view of the wheel bearing that has sensor of the form 4 of application example of the present invention;

Figure 71 is the foreign side's parts of the above-mentioned wheel bearing that has a sensor of expression and the front view of sensor module;

Figure 72 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor different with the wheel bearing that has sensor shown in Figure 70;

Figure 73 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor further different with the wheel bearing that has sensor shown in Figure 70;

Figure 74 is the cut-open view of the wheel bearing that has sensor of the form 5 of application example of the present invention;

Figure 75 is the foreign side's parts of the above-mentioned wheel bearing that has a sensor of expression and the front view of sensor module;

Figure 76 (a) is the front view of the sensor assembly, and Figure 76 (b) is its backplan;

Figure 77 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor different with the wheel bearing that has sensor shown in Figure 74;

Figure 78 is the cut-open view of the installation position of the sensor module wheel bearing that have sensor further different with the wheel bearing that has sensor shown in Figure 74.

Embodiment

According to Fig. 1～Fig. 3, the 1st embodiment of the present invention is described.Present embodiment is that the inner ring of the 3rd die is rotary, and it is applicable to the wheel bearing of driving wheel supporting usefulness.In addition, in this manual, will be at the state that is installed on the vehicle, be called the outside near the side in the outside of the overall width direction of vehicle, will be called the inboard near a side of the centre of vehicle.

This wheel bearing that has sensor is by foreign side's parts 1, interior quadrate part spare 2 constitutes with many row's rolling bodys 5, in these foreign side's parts 1, in interior week, form many row's rolling surfaces 3, should form the rolling surface of facing with each rolling surface 34 by interior quadrate part spare 2, these many row's rolling bodys 5 Jie are located between the rolling surface 3,4 of foreign side's parts 1 and interior quadrate part spare 2.This wheel bearing is many rows' angular contact type ball bearings, and rolling body 5 is formed by ball, and each row is by guard ring 6 maintenances.The cross section of above-mentioned rolling surface 3,4 is circular-arc, and each rolling surface 3,4 forms according to the outside mode of contact angle.The two ends of the bearing space between foreign side's parts 1 and the interior quadrate part spare 2 are respectively by sealing mechanism 7,8 sealings.

Foreign side's parts 1 constitute the fixation side parts, in periphery, have the flange 1a on the steering knuckle in the draft hitch (not shown) that is installed on car body, the whole parts that constitute one.Car body mounting hole 14 is offered at circumferential a plurality of positions on flange 1a.

Interior quadrate part spare 2 constitutes the rotation side component, is made of wheel hub 9 and inner ring 10, and this wheel hub 9 has the wheelboss flange 9a that vehicle is installed usefulness, and this inner ring 10 is chimeric with the periphery of the medial extremity of the axial region 9b of this wheel hub 9.In this wheel hub 9 and inner ring 10, form above-mentioned each row's rolling surface 4.In the periphery of the medial extremity of this wheel hub 9, be provided with and have stage portion and form inner ring chimeric surface 12 than minor diameter, inner ring 10 is chimeric with this inner ring chimeric surface 12.At the center of this wheel hub 9, offer through hole 11.Circumferential a plurality of positions in wheelboss flange 9a, that offers the boss bolt (not shown) is pressed into hole 15.Near the root of the wheelboss flange 9a of wheel hub 9, side-prominent outside have a guide part cylindraceous 13 that wheel and brake component (not shown) are led.

Outside the interior week of the outboard end of quadrate part spare 1, sensor module 21 is set.The axial location of sensor module 21 is between sealing mechanism 7 and rolling surface 3.This sensor module 21 is made of endless member 22 and a plurality of deformation-sensors 23, and these a plurality of deformation-sensors 23 are installed on this endless member 22, measures the distortion of endless member 22.Deformation-sensor 23 is arranged at a plurality of positions of the circumferencial direction of endless member 22 equably, in this example, be arranged at wheel bearing up and down and corresponding 4 positions, the left and right sides.

In sensor module 21, outside the interior week of quadrate part spare 1, be fixed with endless member 22 with press-fit manner, this endless member 22 is the not press fit therefore the time, and produces the shape of plastic yield, material.The material of endless member 22 can not only adopt steel, and can adopt the metal material of copper, brass, aluminium etc., and endless member 22 carries out punch process by the sheet material to these metal materials and obtains, or obtains by these metal materials are carried out cut.

Shown in the shape of cross section image pattern 3 of endless member 22 like that, be following shape, it comprise respectively with the inner peripheral surface of foreign side parts 1 contact, discontiguous contact annulus (the 1st contact annulus) 22a, with axially extended noncontact annulus (the 1st noncontact annulus) 22b along endless member 22, in addition, has heavy section (the 2nd noncontact annulus) 22c, itself and the 1st noncontact annulus 22b adjacency, away from contact ring part 22a one side, its wall thickness contacts annulus 22a greater than the 1st noncontact annulus 22b with the 1st.

Outer peripheral face (bottom of the groove shapes portion between contact annulus 22a and the heavy section 22c) at the noncontact annulus 22b between above-mentioned contact annulus 22a and the heavy section 22c, promptly, at the 1st noncontact annulus 22b, post the deformation-sensor 23 of the axial deformation of measuring this endless member 22.

In Fig. 1, be provided as the mechanism that the output of sensor module 21 is handled, external force calculation mechanism 31, road surface acting force calculation mechanism 32, bearing prepressing force amount calculation mechanism 33, unusual decision mechanism 34.Each mechanism 31～34 both can be arranged on the electronic-circuit device (not shown) of circuit substrate on foreign side's parts 1 grade that is installed on this wheel bearing etc., also can be arranged on the electric control assembly (ECU) of automobile.

In addition, inboard sealing mechanism 8 is made of seal 8a and ring oiler 8b, sealing part 8a is installed on the inner peripheral surface of foreign side's parts 1, elastic body by rubber that has core iron etc. forms, this ring oiler 8b is installed on the outer peripheral face of inner ring 10, above-mentioned seal 8a contacts with this ring oiler 8b, on this ring oiler 8b, the magnetic encoder 16 that the rotation that is formed by the multipole magnet that along the circumferential direction alternately has magnetic pole detects usefulness is set.According to the mode of facing with this magnetic encoder 16, the magnetic sensor (not shown) is installed on the quadrate part spare 1 outside.

Effect to the wheel bearing that has sensor of such scheme describes.If imposed load on wheel hub 9, then by rolling body 5,1 distortion of foreign side's parts, this distortion passes to the endless member 22 in the interior week that is installed on foreign side's parts 1, endless member 22 distortion.By deformation-sensor 23, measure the distortion of this endless member 22.In this occasion,, be difficult to distortion so the rigidity of this part is high because the 2nd noncontact 22c away from contact annulus 22a in the endless member 22 constitutes the heavy section 22c of its wall thickness greater than other position.So the distortion that produces between this heavy section 22c and contact annulus 22a is the radial deformation that shifts foreign side's parts 1, and the distortion that its amplification is produced.Thus, can pass through deformation-sensor 23, with the distortion of good sensitivity detection foreign side parts 1, the deformation measurement precision increases.

Owing to follow direction, the size of load, the variation difference of distortion, so if in advance by experiment, simulation, calculate be out of shape and load between relation, then can calculate the external force that acts on wheel bearing, or the acting force between tire and the road surface.External force calculation mechanism 31 and road surface acting force calculation mechanism 32 are respectively according to like this, by experiment, simulation is calculated and the distortion set and the relation of load in advance, by the output of deformation-sensor 23, calculate respectively and act on the external force of wheel bearing and the acting force between tire and the road surface.

Unusual decision mechanism 34 is being judged the external force of calculating like this that acts on wheel bearing, or the acting force between tire and the road surface is exported to the outside above the occasion of the permissible value of having set with abnormal signal.This abnormal signal can be used for the vehicle control of automobile.

In addition, if by external force calculation mechanism 31 and road surface acting force calculation mechanism 32, output action is in the external force of wheel bearing in real time, or the acting force between tire and the road surface, then can carry out meticulousr vehicle control.

By inner ring 10, wheel bearing is carried out precompressed, still, and also owing to this precompressed, endless member 22 distortion.Thus,, calculate the relation of distortion and precompressed, then know the state of the precompressed of wheel bearing if in advance by experiment, simulation.Bearing prepressing force amount calculation mechanism 33 is according to as described above, by experiment, simulation is calculated in advance and the distortion set and the relation of precompressed, by the output of deformation-sensor 23, output bearing prepressing force amount.In addition, by adopting from the precompressed amount of bearing prepressing force amount calculation mechanism 33 outputs, the precompressed when adjusting the assembling of wheel bearing easily.

Even endless member 22 is added on outside the load of the maximum of estimating under the situation on the wheel bearing, still do not produce plastic yield, and not at its connecting portion with the inner peripheral surface of foreign side's parts 1, the generation gap.Its reason is: if produce plastic yield, or the connecting portion in the interior week of quadrate part spare 1 produces the gap outside, and then the distortion of foreign side's parts 1 can not correctly pass to endless member 22, and the mensuration of being out of shape is impacted.

Because identical therewith reason, connecting portion at the inner peripheral surface of endless member 22 and foreign side's parts 1, be not easy to generate gap or slip, so, also can be at the connecting portion of the inner peripheral surface of endless member 22 and foreign side's parts 1, adopt bonding agent, endless member 22 can adopt bolt with foreign side parts 1 being connected also of inner peripheral surface, though not shown in the drawings about this point.

Fig. 4～Fig. 6 represents the 2nd embodiment, and the shape of the endless member 22 of formation sensor module 21 is different with above-mentioned the 1st embodiment.Promptly, the shape of cross section aspect as hereinbefore of the endless member 22 of this embodiment is to have with the inner peripheral surface of foreign side parts 1 and contacts respectively, non-contacting contact annulus (the 1st contact annulus) 22a and along axially extended noncontact annulus (the 1st noncontact annulus) 22b of endless member 22, but, in addition, difference is to be provided with and the 1st noncontact annulus 22b adjacency, away from flange portion (the 2nd noncontact annulus) 22d in the side direction of contact annulus 22a.In this occasion, outer peripheral face (the cylindrical portion outer peripheral face between contact annulus 22a and the flange portion 22d) at the noncontact annulus 22b between contact annulus 22a and the flange portion 22d, promptly on the 1st noncontact annulus 22b, post the deformation-sensor 23 of the axial distortion of measuring this endless member 22.

In the occasion of present embodiment, same as described above, if on wheel hub 9 imposed load, then by rolling body 5,1 distortion of foreign side's parts, this distortion passes to the endless member 22 on the interior week that is installed on foreign side's parts 1, endless member 22 distortion.In the sensor module 21 of present embodiment, because in noncontact annulus 22b, away from the position of contact annulus 22a, to flange portion 22d, be difficult to distortion so the rigidity of this flange portion 22d is high in being provided with.So the radial deformation that is deformed into transfer foreign side parts 1 that produces between this flange portion 22d and contact annulus 22a, and the distortion that its amplification is produced are expected high-precision deformation measurement same as described above.

In addition, in deformation-sensor 23, external force calculation mechanism 31 same as described above, road surface acting force calculation mechanism 32, bearing prepressing force amount calculation mechanism 33, unusual decision mechanism 34 are set, each mechanism 31～34 can constitute the mechanism that the output of sensor module 21 is handled, though not shown in Fig. 4 about this point.Because other scheme is same as described above,, omit explanation to it so common ground adopts same label.

Below by Fig. 7～Fig. 9, the 3rd embodiment of the present invention is described.In the present embodiment, omit with the explanation of the common aspect of the 1st or the 2nd embodiment.

Image pattern 7 and shown in Figure 9, the transverse cross-sectional shape of endless member 22 is the shape of following flute profile, it comprise respectively with the inner peripheral surface of foreign side parts 1 contact, discontiguous contact annulus 22a, 22e (the 1st contact annulus 22a contacts annulus 22e with the 2nd) and noncontact annulus (the 1st noncontact annulus) 22f, noncontact annulus 22f constitutes the bottom wall portion of its slotted shape, and contact annulus 22a, 22e constitute the side walls part of above-mentioned groove shape shape.The wall thickness of contact annulus 22a, the 22e of both sides is greater than noncontact annulus 22f.Said here wall thickness refers to the thickness of radial direction with regard to noncontact annulus 22f, just contacts annulus 22a, 22e, spindle to thickness.

At the outer peripheral face of noncontact annulus 22f, that is, the inner bottom surface of endless member 22 posts the deformation-sensor 23 of the axial distortion of measuring this endless member 22.

Effect to the wheel bearing that has sensor of such scheme describes.Identical with the above-mentioned the 1st and the 2nd embodiment, if on wheel hub 9 imposed load, by rolling body 5, foreign side's parts 1 distortion, this distortion passes to the endless member 22 in the interior week that is installed on foreign side's parts 1, endless member 22 distortion.By deformation-sensor 23, measure the distortion of this endless member 22.In this occasion, noncontact annulus 22f follows foreign side's parts 1 mainly is axial distortion and being out of shape.On the other hand, because the wall thickness of contact annulus 22a, 22e is difficult to distortion greater than noncontact annulus 22c so this partially rigid is high.So, at noncontact annulus 22c, produce axial distortion, still, this is deformed into the axial deformation in the interior week of shifting foreign side's parts 1, and the distortion that its amplification is formed, and thus, the mensuration precision of the distortion of sensor 23 increases.

Figure 10～Figure 12 represents the 4th embodiment, and the shape of the endless member 22 of formation sensor module 21 is different with above-mentioned the 3rd embodiment with the installation site of sensor 23.The transverse cross-sectional shape of the endless member 22 of this embodiment is following groove shape, it comprises respectively with the inner peripheral surface of foreign side parts 1 and contacting, discontiguous contact annulus 22g, 22h (the 1st contact annulus 22g contacts annulus 22h with the 2nd) and noncontact annulus (the 1st noncontact annulus) 22i, in this regard, identical with above-mentioned embodiment.But, in the endless member 22 of this embodiment, the wall thickness of among contact annulus 22g, the 22h of both sides one contact annulus 22h is greater than another contact annulus 22g, and the wall thickness of noncontact annulus 22i is further greater than the wall thickness of these parts.

At the inner face of the little contact annulus 22g of above-mentioned wall thickness, that is, face on the face of a side with contacting annulus 22h, post the deformation-sensor 23 of the distortion of the bending direction of measuring this endless member 22.

If the employing present embodiment is identical with above-mentioned the 1st～the 3rd embodiment, if on wheel hub 9 imposed load, then by rolling body 5,1 distortion of foreign side's parts, this distortion passes to the endless member 22 in the interior week that is installed on foreign side's parts 1, endless member 22 distortion.In the sensor module 21 of this embodiment, what post that the contact annulus 22g of deformation-sensor 23 follows foreign side's parts 1 mainly is axial distortion and being out of shape, but, because a wall thickness that contacts annulus 22h and noncontact annulus 22i is thick, be difficult to distortion so rigidity is high, thin contact annulus 22g produces flexural deformation.This is deformed into the axial deformation in the interior week of shifting foreign side's parts 1, and the distortion that its amplification is formed.Thus, identical with above-mentioned the 3rd embodiment, expect high-precision deformation measurement.

In addition, in deformation-sensor 23, the external force calculation mechanism 31 identical with the example of Fig. 7, road surface acting force calculation mechanism 32, bearing prepressing force amount calculation mechanism 33, unusual decision mechanism 34 are set, each mechanism 31～34 can form the mechanism that the output of sensor module 21 is handled, though omit about being shown among Figure 10 of this point.But, in present embodiment and the 3rd embodiment, because the variation difference of the direction of load, the distortion that size causes, so set in advance by experiment, the distortion of the occasion of analog computation present embodiment and the relation between the load, the computing formula, constant of above-mentioned each calculation mechanism 31～33, decision mechanism 34 etc.Same as described above because of other scheme, common part adopts same label, omits the explanation to it.

In addition, in the respective embodiments described above, endless member 22 is installed on the interior week of foreign side's parts 1, and still, endless member 22 also can be installed on the periphery of foreign side's parts 1.

Below according to Figure 13～Figure 15, to not being to be that the application example of prerequisite describes with basic scheme of the present invention.In this application example, omit with the explanation of the common aspect of any person in the 1st～the 4th embodiment.

Interior week of the outboard end of quadrate part spare 1 outside, with the sealing mechanism 7 all-in-one-piece states in the outside, sensor module 21 is set.

The sealing mechanism 7 in the outside is the contact seal, and it has a plurality of sealing flanges with the periphery sliding contact of wheel hub 9, is formed by rubber etc., with endless member 22 bonding being integral.That is, endless member 22 double as should contact the core iron of seal.

The transverse cross-sectional shape of endless member 22 is square substantially, and side face posts 4 deformation-sensors 23 of the axial distortion of measuring endless member 22 within it.Figure 15 (a) (b) only represents endless member 22 and deformation-sensor 23, still, on the side of endless member 22, constitutes bonding being integral of contact seal of outside sealing mechanism 7.

On this endless member 22, constitute bonding being integral of contact seal of outside sealing mechanism 7, also identical in the embodiment that this point provides in the back.

Have in the wheel bearing of sensor at this, because sealing mechanism 7 is set on endless member 22, so the core iron of endless member 22 double as sealing mechanisms 7.Thus, can make the wheel bearing compactness that has sensor vertically, but and low price ground have sealing function, seek the further reduction of cost.

Figure 16 represents the 5th embodiment.In the 5th embodiment, identical with above-mentioned application example, sealing mechanism 7 is integral with endless member 22, in addition, identical with above-mentioned the 1st embodiment shown in Figure 3, the transverse cross-sectional shape of endless member 22 is following shape, it has respectively with the inner peripheral surface of foreign side parts 1 and contacts, discontiguous contact annulus (the 1st contact annulus) 22a and along 1 axially extended noncontact annulus (the 1st noncontact annulus) 22b of endless member 22, has heavy section (the 2nd noncontact annulus) 22c in addition, itself and the 1st noncontact annulus 22b adjacency, in a side away from contact annulus 22a, its wall thickness is greater than the 1st noncontact annulus 22b, outer peripheral face (bottom of the groove shapes portion between contact annulus 22a and the heavy section 22c) at the noncontact annulus 22b between above-mentioned contact annulus 22a and the heavy section 22c posts the deformation-sensor 23 of the axial distortion of measuring this endless member 22.

In addition, in deformation-sensor 23, external force calculation mechanism 31 same as described above, road surface acting force calculation mechanism 32, bearing prepressing force amount calculation mechanism 33, unusual decision mechanism 34 are set, each mechanism 31～34 can form the mechanism that the output of sensor module 21 is handled, though not shown in Figure 16 about this point.Because it is identical with above-mentioned application example that other scheme and the above-mentioned the 1st is implemented,, omit explanation to it so common part adopts same label.

Figure 17 represents the 6th embodiment.In this 6th embodiment, identical with above-mentioned application example, sealing mechanism 7 forms one with endless member 22, in addition, identical with above-mentioned the 2nd embodiment shown in Figure 6, the transverse cross-sectional shape of endless member 22 has respectively with the inner peripheral surface of foreign side parts 1 and contacts, non-contacting contact annulus (the 1st contact annulus) 22a and along axially extended noncontact annulus (the 1st noncontact annulus) 22b of endless member 22, this point is identical with the 2nd embodiment, but, also be provided with and the 1st noncontact annulus 22b adjacency, away from flange portion (the 2nd noncontact annulus) 22d in contact annulus 22a one side direction, deformation-sensor 23 is affixed on the outer peripheral face (the cylindrical portion outer peripheral face between contact annulus 22a and the flange portion 22d) of the noncontact annulus 22b between contact annulus 22a and the flange portion 22d, measures the axial distortion of this endless member 22.

Because other scheme is identical with above-mentioned application example with above-mentioned the 2nd embodiment, equally here, common part adopts same label, and it illustrates omission.

Figure 18 represents the 7th embodiment.In the 7th embodiment, identical with above-mentioned application example, sealing mechanism 7 is integral with endless member 22, in addition, identical with above-mentioned the 3rd embodiment shown in Figure 9, the transverse cross-sectional shape of endless member 22 comprises respectively with the inner peripheral surface of foreign side parts 1 and contacting, non-contacting contact annulus 22a, 22e and noncontact annulus 22f, contact annulus 22a, the wall thickness of 22e is greater than noncontact annulus 22f, in addition, at two contact annulus 22a, the outer peripheral face of noncontact annulus 22f between the 22e (contact annulus 22a, the bottom of the groove shapes portion between the 22e), post the deformation-sensor 23 of the axial distortion of measuring this endless member 22.

Because other scheme is identical with above-mentioned application example with above-mentioned the 3rd embodiment,,, omit explanation equally here to it so common part adopts same label.

Figure 19 represents the 8th embodiment.In the 8th embodiment, identical with above-mentioned application example, sealing mechanism 7 forms one with endless member 22, in addition, identical with above-mentioned the 4th embodiment shown in Figure 12, the transverse cross-sectional shape of endless member 22 has respectively with the inner peripheral surface of foreign side parts 1 and contacts, non-contacting contact annulus 22g, 22h and noncontact annulus 22i, contact annulus 22g, among the 22h, the wall thickness of one of them contact annulus 22g is greater than another contact annulus 22h, they are bigger for the wall ratio of noncontact annulus 22i, in addition, deformation-sensor 23 is affixed on the inner face (with the face that contacts the side that annulus 22g faces) of contact annulus 22h, measures the distortion of the bending direction of this endless member 22.

Because other scheme is identical with above-mentioned application example with above-mentioned the 4th embodiment,, omit explanation to it so common part adopts same label.

In addition, in the respective embodiments described above, externally quadrate part spare 1 is illustrated for the occasion of fixation side parts, but, quadrate part spare was the wheel bearing that has sensor of fixation side parts in the present invention also can be applicable to, in this occasion, above-mentioned endless member is installed on the periphery or the side face in interior week that constitutes interior quadrate part spare.

Also have, in the above-described embodiment, the occasion of sensor module 21 with the sealing mechanism 7 formation one in the outside is illustrated, also can form one with the sealing mechanism 8 of inboard.In this occasion, be installed on seal 8a and endless member 22 bonding being integral on foreign side's parts (fixation side parts) 1, the core iron of endless member 22 double as seal 8a.

In addition, in the respective embodiments described above, occasion to the wheel bearing that is applicable to the 3rd die is illustrated, but, the present invention is also applicable to the wheel bearing of the 1st or the 2nd die of the separate parts of bearing portions and wheel hub, the wheel bearing of the 4th die that the part of interior quadrate part spare is made of the outer ring of velocity joint.In addition, the wheel bearing that this wheel bearing that has sensor is also used applicable to engaged wheel, in addition, also applicable to the wheel bearing of the taper roller type of each die.

According to Figure 20～Figure 22, the 9th embodiment of the present invention is described.Present embodiment is that the inner ring of the 3rd die is rotary, is applicable to the wheel bearing of driving wheel supporting usefulness.In addition, in this manual, will be called the outside near the side in the outside of the overall width direction of vehicle, be called the inboard near a side of the centre of vehicle at the state that is installed on vehicle.

This wheel bearing that has sensor is by foreign side's parts 1, interior quadrate part spare 2 constitutes with many row's rolling bodys 5, in these foreign side's parts 1, in interior week, form many row's rolling surfaces 3, should form the rolling surface of facing with each rolling surface 34 by interior quadrate part spare 2, these many row's rolling bodys 5 Jie are located between the rolling surface 3,4 of foreign side's parts 1 and interior quadrate part spare 2.This wheel bearing is many rows' angular contact ball bearing types, and rolling body 5 is formed by ball, and each row is by guard ring 6 maintenances.The cross section of above-mentioned rolling surface 3,4 is circular-arc, and each rolling surface 3,4 forms according to the outside mode of contact angle.The two ends of the bearing space between foreign side's parts 1 and the interior quadrate part spare 2 seal respectively by sealing mechanism 7,8.

On the end face of the inboard of quadrate part spare 1, sensor module 21 is set outside.This sensor module 21 is by endless member 22, constitutes with a plurality of deformation-sensors 23 that are affixed on this endless member 22, measure the distortion of endless member 22.Deformation-sensor 23 is arranged at a plurality of positions of the circumferencial direction of endless member 22 equably, in this example, be arranged at wheel bearing up and down and corresponding 4 positions, the left and right sides.

Shown in the transverse cross-sectional shape image pattern 22 of endless member 22 like that, comprise with the end face of foreign side parts 1 and contacting respectively, non-contacting contact annulus (the 1st contact annulus) 22a and noncontact annulus 22b, in noncontact annulus 22b, position away from contact annulus 22a is provided with inside flange portion 22d.In addition, the outer peripheral face of the noncontact annulus 22b between contact annulus 22a and the flange portion 22d (the cylindrical portion outer peripheral face between contact annulus 22a and the heavy section 22c) posts the deformation-sensor 23 of the axial distortion of measuring this endless member 22.

Sensor module 21 is by bonding agent, and the end face of the lateral surface of the contact annulus 22a of bonding endless member 22 and the inboard of foreign side's parts 1 thus, is fixed on foreign side's parts 1.Sensor module 21 adopts adhesive securement, also can fix as following in addition.

Wheel bearing shown in Figure 23 is the end face of quadrate part spare 1 outside, forms the circumferential groove 40 of axial depth, in this circumferential groove 40 chimeric with contact the circumference protuberance 41 that annulus 22a is integrally formed, sensor module 21 is fixed on foreign side's parts 1.Wheel bearing shown in Figure 24 is by bolt 42, and 22a is fixed on the end face of foreign side's parts 1 with the contact annulus, thus, sensor module 21 is fixed on foreign side's parts 1.In these fixing meanss, also can adopt bonding agent simultaneously.

In addition, but also image pattern 25～shown in Figure 27 is installed on sensor module 21 on the end face in the outside of foreign side's parts 1.Equally in this occasion, the fixing means of sensor module 21 can adopt the method (Figure 25) of using bonding agent, method (Figure 26) that circumferential groove 40 and circumference protuberance 41 is chimeric, with any person in the method (Figure 27) that adopts bolt 42.

Effect to the wheel bearing that has sensor of such scheme describes.If imposed load on wheel hub 9, then by rolling body 5,1 distortion of foreign side's parts, its distortion passes to the endless member 22 on the end face that is installed on foreign side's parts 1, endless member 22 distortion.By deformation-sensor 23, measure the distortion of this endless member 22.In the sensor module 21 of present embodiment, because in noncontact annulus 22b, away from the position of contact annulus 22a, to flange portion 22d, be difficult to distortion so the rigidity of this flange portion 22d is high in being provided with.So the radial deformation that is deformed into foreign side's parts 1 that produces between this flange portion 22d and the contact annulus 22a shifts, and the distortion that its amplification is formed.Thus, can pass through deformation-sensor 23, with good sensitivity, detect the distortion of foreign side's parts 1, the deformation measurement precision improves.

Figure 28～Figure 30 represents the 10th form of implementation.The shape of the endless member 22 of the formation sensor module 21 in this form of implementation is different with the 9th embodiment, and other scheme is identical with the 9th embodiment, and thus, common part adopts same label, omits the explanation to it.

Shown in the transverse cross-sectional shape image pattern 30 of the endless member 22 of present embodiment like that, have respectively with the end face of foreign side parts 1 and contact, non-contacting contact annulus 22a and noncontact annulus 22b, this point is identical with the 9th embodiment, and difference is among the noncontact annulus 22b, constitutes the heavy section 22c of wall thickness greater than other position away from the position that contacts annulus 22a.In this occasion, outer peripheral face (bottom of the groove shapes portion between contact annulus 22a and the heavy section 22c) at the noncontact annulus 22b between above-mentioned contact annulus 22a and the heavy section 22c posts the deformation-sensor 23 of the axial distortion of measuring this endless member 22.

Equally, same as described above in the occasion of present embodiment, if on wheel hub 9 imposed load, then by rolling body 5,1 distortion of foreign side's parts, this distortion passes to the endless member 22 on the end face that is installed on foreign side's parts 1, endless member 22 distortion.By deformation-sensor 23, measure the distortion of this endless member 22.In the sensor module 21 of present embodiment, the noncontact annulus 22b away from the position of contact annulus 22a in the endless member 22 constitutes the heavy section 22c of wall thickness greater than other position, and thus, the rigidity of this part is high and be difficult to distortion.So the radial deformation that is deformed into foreign side's parts 1 that produces between this heavy section 22c and contact annulus 22a shifts, and the distortion that its amplification is formed.Thus, can pass through deformation-sensor 23, with the distortion of good sensitivity detection foreign side parts 1, the deformation measurement precision increases.

Equally in the present embodiment, can pass through load detecting system shown in Figure 1, same as described above, the output of deformation-sensor 23 is handled.

In addition, but also shown in the image pattern 31 like that, the sensor module 21 that will have an endless member 22 of above-mentioned shape is installed on the end face in the outside of foreign side's parts 1.

Figure 32～Figure 34 represents the 11st embodiment.Equally in the present embodiment, shape and the 9th, the 10th embodiment of endless member 22 that constitutes sensor module 21 is different, and still, other scheme and the 9th, the 10th embodiment are identical, and thus, common part adopts same label, and it illustrates omission.

Shown in the image pattern 34 like that, the transverse cross-sectional shape of the endless member 22 of present embodiment is the shape of following flute profile, it comprises respectively with the end face of foreign side parts 1 and contacting, non-contacting contact annulus (the 1st contact annulus) 22a, 22e and noncontact annulus 22f, noncontact annulus 22f constitutes the bottom wall portion of this slotted shape, and contact annulus 22a, 22e constitute the side walls part of above-mentioned slotted shape.The wall thickness of contact annulus 22a, the 22e of both sides is greater than noncontact annulus 22f.Said here wall thickness is axial thickness with regard to noncontact annulus 22f, at contact annulus 22a, 22e, refers to thickness radially.

At the outer peripheral face of noncontact annulus 22f, that is, the inner bottom surface of endless member 22 posts the diastrophic deformation-sensor 23 of measuring this endless member 22.

Equally in the occasion of present embodiment, if on wheel hub 9 imposed load, then by rolling body 5,1 distortion of foreign side's parts, this distortion passes to the endless member 22 on the end face that is installed on foreign side's parts 1, endless member 22 distortion.By deformation-sensor 23, measure the distortion of this endless member 22.In this occasion, noncontact annulus 22f follows the main axial distortion of foreign side's parts 1 and is out of shape.On the other hand, because the wall thickness of contact annulus 22a, 22e is difficult to distortion greater than noncontact annulus 22f so the rigidity of this part is high.So, at noncontact annulus 22f, produce flexural deformation, still, this is deformed into the axial deformation of the end face of foreign side's parts 1 is shifted, and the distortion that its amplification is formed, and thus, the mensuration precision of the distortion of sensor 23 increases.

Equally in the present embodiment, can pass through load detecting system shown in Figure 1, same as described above, the output of deformation-sensor 23 is handled.

In addition, but also shown in the image pattern 35 like that, the sensor module 21 with endless member 22 of above-mentioned shape is installed on the end face in the outside of foreign side's parts 1.

Figure 36～Figure 38 represents the 12nd embodiment.Equally in the present embodiment, except the endless member 22 that constitutes sensor module 21, other aspect and the 9th～the 11st embodiment is identical, and common part adopts same label, and it illustrates omission.

Shown in the transverse cross-sectional shape image pattern 38 of the endless member 22 of present embodiment like that, be flute profile, it comprises respectively with the end face of foreign side parts 1 and contacting, non-contacting contact annulus 22g, 22h and noncontact annulus 22i, and this point is identical with the 11st embodiment.But, in the endless member 22 of this embodiment, among contact annulus 22g, the 22h of both sides, the wall thickness of a contact annulus 22h is greater than another contact annulus 22g, and the wall thickness of noncontact annulus 22i is further greater than these parts.

On the inner face of the little contact annulus 22g of above-mentioned wall thickness, that is, with the face that contacts the side that annulus 22h faces on, post the deformation-sensor 23 of the axial distortion of measuring this endless member 22.

Equally in the present embodiment, if on wheel hub 9 imposed load, by rolling body 5, foreign side's parts 1 distortion, this distortion passes to the endless member 22 on the end face that is installed on foreign side's parts 1, endless member 22 distortion.In the sensor module 21 of present embodiment, it in foreign side's parts 1 mainly is axial distortion and being out of shape that the contact annulus 22g that posts deformation-sensor 23 follows, but, because the wall thickness of one of them contact annulus 22h and noncontact annulus 22i is thick, be difficult to distortion so rigidity is high, contact annulus 22g thin produces axial distortion.This radial deformation that is deformed into the end face of foreign side's parts 1 shifts, and the distortion that its amplification is formed.Thus, identical with the 3rd embodiment, expect high-precision deformation measurement.

Equally in the present embodiment, can pass through load detecting system shown in Figure 1, same as described above, the output of deformation-sensor 23 is handled.

In addition, but also shown in the image pattern 39 like that, the sensor module 21 that will have an endless member 22 of above-mentioned shape is installed on the end face in the outside of foreign side's parts 1.

In the 9th～the 12nd embodiment, in order the distortion of foreign side's parts 1 to be passed to the installation position of the deformation-sensor 23 of endless member 22 in the amplification mode, endless member 22 is complicated transverse cross-sectional shape, but, but also shown in image pattern 62～Figure 64, be not that the application example of prerequisite is such, form the endless member 22 of simple transverse cross-sectional shape with basic scheme of the present invention.In this occasion, on the end face of quadrate part spare 1, sensor module 21 is set outside equally.In the occasion of this application example, the transverse cross-sectional shape of endless member 22 is a rectangle, and deformation-sensor 23 is posted at a plurality of positions of side face within it.In this example, be arranged at wheel bearing up and down and corresponding 4 positions, the left and right sides.

In addition, but also shown in the image pattern 65 like that, the sensor module 21 that will have an endless member 22 of above-mentioned shape is installed on the end face in the outside of foreign side's parts 1.

Figure 66～Figure 68 represents not to be with basic scheme of the present invention to be the Another Application example of prerequisite.In this embodiment, the scheme of sensor module 21 and the 1st～the 5th embodiment is different, sensor module 21 is by the sensor installing component 24 on the part of the circumferencial direction of the end face that is installed on foreign side's parts 1, with be affixed on this sensor installing component 24, the deformation-sensor of the distortion of determination sensor installing component 24 23 constitutes.Aspect in addition and the 1st～the 5th embodiment is identical, and common part adopts same label, and it illustrates omission.

Shown in the image pattern 68 like that, the front shape of the sensor installing component 24 is the consistent circular-arc band shape of end surface shape with the inboard of foreign side parts 1, portion therebetween forms the notch part 24c of the outer circumferential side that is opened on circular arc.In addition, at both ends, be formed on contact fixed part 24a, 24b that inner face side is stretched out.In addition, on the face of all sides of the sensor installing component 24 at the back side that is positioned at this notch part 24c, post deformation-sensor 23.The section shape of sensor installing component 24 be such as, rectangle still, can be other different shape.

This sensor module 21 is fixed on the end face of foreign side's parts 1 by contact fixed part 24a, the 24b of sensor installing component 24.Position beyond contact fixed part 24a, the 24b of sensor installing component 24, and the end face of foreign side's parts 1 between, produce the gap., be fixed on foreign side's parts 1 in the end face area that foreign side's parts 1 radially is out of shape because of the load that acts on foreign side's parts 1 the biglyyest as any one the 1st contact fixed part 24a among contact fixed part 24a, the 24b.The 2nd contact fixed part 24b is fixed in relative said fixing position, the position that distortion radially is few.

In the occasion of this application example, if on wheel hub 9 imposed load, then by rolling body 5,1 distortion of foreign side's parts, this distortion passes to the sensor installing component 24 on the end face that is installed on foreign side's parts 1,24 distortion of sensor installing component.By deformation-sensor 23, measure the distortion of this sensor installing component 24.At this moment, sensor installing component 24 follow foreign side's parts 1 sensor installing component 24 fixed position distortion radially and be out of shape, but, outside on the quadrate part spare 1, notch part 24c is set, and at the position of this notch part 24c, rigidity reduces, thus, be presented in the deformation-sensor installation position of sensor installing component 24 greater than the distortion of the distortion of foreign side's parts 1.Thus, also can pass through deformation-sensor 23, correctly detect the microdeformation of foreign side's parts 1.

In this way of example, can pass through load detecting system shown in Figure 1 equally, same as described above, the output of deformation-sensor 23 is handled.

In addition, but also shown in the image pattern 69 like that, the sensor module 21 that will have an endless member 22 of above-mentioned shape is installed on the end face in the outside of foreign side's parts 1.

Figure 40～Figure 42 represents the 13rd embodiment.The difference of present embodiment and the 1st embodiment is to constitute sensor module 21, be used as the form of the 23a of deformation detection mechanism of deformation-sensor function, other scheme is identical with the 1st embodiment, thus, common part adopts same label, and it illustrates omission.

Shown in the transverse cross-sectional shape image pattern 42 of the endless member 22 of present embodiment like that, be following shape, it comprises with the inner peripheral surface of foreign side parts 1 and contacting respectively, non-contacting contact annulus 22a and noncontact annulus 22b, form among the noncontact annulus 22b, away from the wall thickness at the position of contact annulus 22a heavy section 22c greater than other position.

4 positions in the outer peripheral face of the noncontact annulus 22b between above-mentioned contact annulus 22a and the heavy section 22c (bottom of the groove shapes portion between contact annulus 22a and the heavy section 22c) are provided with the 23a of deformation detection mechanism of the axial distortion of this endless member 22 of mensuration.

In the above-mentioned deformation detection 23a of mechanism, shown in the image pattern 43 like that, dielectric film 44 is set on the surface of endless member 22, on this dielectric film 44,, form the resistive element 25 that deformation detection is used by surface treatment.Mode according to surface that covers dielectric film 44 and resistive element 25 and periphery forms diaphragm 26.Thus, resistive element 25 is securely fixed on the endless member 22, and is cut off by the bearing space that is provided with sensor module 21.

Also can replace on the surface of endless member 22, being provided with the mode of dielectric film 44, and by the insulativity material, it is own to form endless member 22.Figure 44 represents its 1 example, in the endless member 22 of this example, on the surface as the steel 22a of core, forms the insulation course 22b of silicon coverlay.If like this, 22 of endless members are as the insulativity material, and then dielectric film 44 is unwanted.

In the occasion of present embodiment, if same as described above, imposed load on wheel hub 9 is then passed through rolling body 5 equally, 1 distortion of foreign side's parts, and this distortion passes on the endless member 22 in the interior week that is installed on foreign side's parts 1, endless member 22 distortion.By the resistive element 25 of the 23a of deformation detection mechanism, measure the distortion of this endless member 22.In the sensor module 21 of present embodiment,, be difficult to distortion so the rigidity of this part is high because the noncontact annulus 22b away from the position that contacts annulus 22a in the endless member 22 forms the heavy section 22c of its wall thickness greater than other position.So the radial deformation that is deformed into foreign side's parts 1 that produces between this thick ancient piece of jade, round, flat and with a hole in its centre 22c of portion and contact annulus 22a shifts, and the distortion that its amplification is formed.Thus, can pass through resistive element 25, with good sensitivity, detect the distortion of foreign side's parts 1, the deformation measurement precision increases.

Equally in the present embodiment, can pass through sensor signal processing circuit shown in Figure 1, identical with aforesaid way, the output of resistive element 25 is handled.

Have in the wheel bearing of sensor at this, because being installed on the resistive element that the installation deformation detection is used on the sensor installing component of fixation side parts, so can compactly load transducer be arranged on the vehicle.Because the sensor installing component is the simple parts that are installed on the fixation side parts, so by resistive element is mounted thereon, the property produced in batches is good, can seek the reduction of cost.

In addition, the wheel bearing that has this sensor does not adopt the deformation-sensor as the manufactured goods of deformation detection mechanism, and the resistive element that deformation detection is used is set being located on the lip-deep dielectric film of sensor installing component, with it as deformation detection mechanism, thus, but low price ground makes sensor module.If by coverlay, cover around the surface of resistive element and its, because resistive element is firmly fixed on the sensor installing component, so do not have resistive element disengaging, the situation of offset, the reliability height that measuring ability is kept.

In the above-described embodiment, sensor module 21 is arranged on the inner peripheral surface as foreign side's parts 1 of fixation side parts, and still, sensor module also can be arranged on the end face of foreign side's parts 1.Figure 45 represents that sensor module 21 is arranged at the example on the end face in the outside of foreign side's parts 1, and Figure 46 represents that sensor module 21 is arranged at the example on the end face in the outside of foreign side's parts 1.

Figure 47～Figure 49 represents the 14th embodiment.The difference of this embodiment and the 13rd embodiment is to constitute the shape of the endless member 22 of sensor module 21, and other scheme is identical with the 13rd embodiment, and thus, common part adopts same label, and it illustrates omission.

Shown in the transverse cross-sectional shape image pattern 49 of the endless member 22 of present embodiment like that, comprise respectively with the inner peripheral surface of foreign side parts 1 and contacting, discontiguous contact annulus 22a and noncontact annulus 22b, this point is identical with the 13rd embodiment, but, its difference is among the noncontact annulus 22b that the position away from contact annulus 22a is provided with inside flange portion 22d.In this occasion, at the outer peripheral face (the cylindrical portion outer peripheral face between contact annulus 22a and the heavy section 22c) of the noncontact annulus 22b between contact annulus 22a and the flange portion 22d, the 23a of deformation detection mechanism of the axial distortion of measuring this endless member 22 is set.

Equally in the occasion of present embodiment, if on wheel hub 9 imposed load, by rolling body 5,1 distortion of foreign side's parts, its distortion passes to the endless member 22 in the interior week that is installed on foreign side's parts 1, endless member 22 distortion.In the sensor module 21 of present embodiment, among the noncontact annulus 22b, away from the position of contact annulus 22a, to flange portion 22d, thus, the rigidity of this flange portion 22d is high and be difficult to distortion in being provided with.So the radial deformation that is deformed into foreign side's parts 1 that produces between this flange portion 22d and contact annulus 22a shifts, and the distortion that its amplification is formed, and expects high-precision deformation measurement same as described above.

Equally in the present embodiment, by sensor signal processing circuit shown in Figure 1, can be same as described above, the output of resistive element 25 is handled.

In the above-described embodiment, sensor module 21 is arranged on the inner peripheral surface as foreign side's parts 1 of fixation side parts, but sensor module also can be arranged on the end face of foreign side's parts 1.Figure 50 represents that sensor module 21 is arranged at the example of end face of the inboard of foreign side's parts 1, and Figure 51 represents that sensor module 21 is arranged at the example on the end face in the outside of foreign side's parts 1.

Figure 52～Figure 54 represents the 15th embodiment.Equally in the present embodiment, except the endless member 22 that constitutes sensor module 21, other aspect is identical with the 13rd or the 14th embodiment, and common part adopts same label, and it illustrates omission.

Shown in the image pattern 54 like that, the transverse cross-sectional shape of the endless member 22 of this embodiment is the shape of following groove shape, it comprises respectively with the inner peripheral surface of foreign side parts 1 and contacting, non-contacting contact annulus 22a, 22e and noncontact annulus 22f, noncontact annulus 22f constitutes the bottom wall portion of this slotted shape, and contact annulus 22a, 22e constitute the side walls part of above-mentioned slotted shape.The wall thickness of contact annulus 22a, the 22e of both sides is greater than noncontact annulus 22f.Said here wall thickness refers to the thickness of radial direction at noncontact annulus 22f, at contact annulus 22a, 22e, spindle to thickness.

At the outer peripheral face of noncontact annulus 22f, that is, on the inner bottom surface of endless member 22, the 23a of deformation detection mechanism of the axial distortion of measuring this endless member 22 is set.

The occasion of same present embodiment, if on wheel hub 9 imposed load, then by rolling body 5,1 distortion of foreign side's parts, its distortion passes to the endless member 22 in the interior week that is installed on foreign side's parts 1, endless member 22 distortion.Measure the distortion of this endless member 22 by resistive element 25.In this occasion, noncontact annulus 22f follows foreign side's parts 1 mainly is axial distortion and being out of shape.On the other hand, because the wall thickness of contact annulus 22a, 22e is difficult to distortion greater than noncontact annulus 22f so the rigidity of this part is high.So, at noncontact annulus 22f, produce axial distortion, still, this is deformed into the axial deformation in the interior week of foreign side's parts 1 is shifted, and the distortion that its amplification is formed, and thus, the mensuration precision of the distortion of resistive element 25 increases.

Equally in the present embodiment, same as described above by sensor signal processing circuit shown in Figure 1, the output of resistive element 25 is handled.

In the above-mentioned embodiment, sensor module 21 is arranged on the inner peripheral surface as foreign side's parts 1 of fixation side parts, and still, sensor module also can be arranged on the end face of foreign side's parts 1.Figure 55 represents that sensor module 21 is arranged at the example on the end face of inboard of foreign side's parts 1, and Figure 56 represents that sensor module 21 is arranged at the example on the end face in the outside of foreign side's parts 1.

Figure 57～Figure 59 represents the 16th embodiment.Equally in the present embodiment, except the endless member 22 that constitutes sensor module 21, other aspect and the 13rd～the 15th embodiment is identical, and common part adopts same label, and it illustrates omission.

Shown in the transverse cross-sectional shape image pattern 59 of the endless member 22 of present embodiment like that, in the form of slot, it comprises respectively with the inner peripheral surface of foreign side parts 1 and contacting, and non-contacting contact annulus 22g, 22h and noncontact annulus 22i are identical with the 15th embodiment in this respect.But in the endless member 22 of this embodiment, the wall thickness of a contact annulus 22h among contact annulus 22g, the 22h of both sides is greater than another contact annulus 22g, and the wall thickness of noncontact annulus 22i is further greater than these parts.

At the inner face of the little contact annulus 22g of above-mentioned wall thickness, that is, on the face that contacts the side that annulus 22h faces, the deformation detection mechanism 23 of the distortion of the bending direction of measuring this endless member 22 is set.

Equally in the present embodiment, if on wheel hub 9 imposed load, then by rolling body 5,1 distortion of foreign side's parts, this distortion passes to the endless member 22 in the interior week that is installed on foreign side's parts 1, endless member 22 distortion.In the sensor module 21 of present embodiment, it in foreign side's parts 1 mainly is axial distortion and being out of shape that the contact annulus 22g that is provided with the 23a of deformation detection mechanism follows, but, because a wall thickness that contacts annulus 22h and noncontact annulus 22i is thick, be difficult to distortion so rigidity is high, in thin contact annulus 22g, produce flexural deformation.This is deformed into the axial deformation in the interior week of foreign side's parts 1 is shifted, and the distortion that its amplification is formed.Thus, identical with the 4th embodiment, expect high-precision deformation measurement.

Equally in the present embodiment, same as described above by sensor signal processing circuit shown in Figure 1, can handle the output of resistive element 25.

In the above-described embodiment, sensor module 21 is arranged on the inner peripheral surface of foreign side's parts 1 of fixation side parts, and still, sensor module also can be arranged on the end face of foreign side's parts 1.Figure 60 represents that sensor module 21 is arranged at the example on the end face of inboard of foreign side's parts 1, and Figure 61 represents that sensor module 21 is arranged at the example on the end face in the outside of foreign side's parts 1.

In the 13rd～the 16th embodiment, in order the distortion of foreign side's parts 1 to be passed to the installation position of the deformation-sensor 23 of endless member 22 in the amplification mode, endless member 22 is complicated transverse cross-sectional shape, but also shown in image pattern 70 and Figure 71, be not that the application example of prerequisite is such, be the endless member 22 of simple transverse cross-sectional shape with basic scheme of the present invention.In this occasion, on the inner peripheral surface of quadrate part spare 1, sensor module 21 is set outside equally.In the occasion of this application example, the transverse cross-sectional shape of endless member 22 shape that is rectangle, deformation-sensor 23 is posted at a plurality of positions of side face within it.In this example, be arranged at wheel bearing up and down and corresponding 4 positions, the left and right sides.

In above-mentioned application example, sensor module 21 is arranged on the inner peripheral surface as foreign side's parts 1 of fixation side parts, but the sensor module of this application example also can be arranged on the end face of foreign side's parts 1.Figure 72 represents that sensor module 21 is arranged at the example on the end face of inboard of foreign side's parts 1, and Figure 73 represents that sensor module 21 is arranged at the example on the end face in the outside of foreign side's parts 1.

Figure 74～Figure 76 represents not to be the another application example of prerequisite with basic scheme of the present invention.This embodiment and the 13rd～the 16th embodiment is different, and the sensor installing component 28 of sensor module 21 is installed on the part of circumferencial direction of foreign side's parts 1.The embodiment of aspect in addition and the 13rd～16th is identical, and common part adopts same label, and it illustrates omission.

Shown in the image pattern 76 like that, the sensor installing component 28 is along the circumferential elongated primary circle arcuation along the inner peripheral surface of foreign side's parts 1, at its both ends, be formed on contact fixed part 28a, 28b that the outer circumferential side of circular arc stretches out, at pars intermedia, be formed on the notch part 28c of the outer circumferential side opening of circular arc in addition.In addition, on the face of all sides of the circular arc at the back side that is positioned at notch part 28c, deformation detection mechanism 23 is set.This deformation detection mechanism 23 also is following form; wherein; dielectric film 44 is set on the surface of sensor installing component 28; on this dielectric film 44, form the resistive element 25 that deformation detection is used by surface treatment; according to the mode of the surface that covers dielectric film 44 and resistive element 25, form diaphragm 26 with periphery.The section shape of sensor installing component 28 such as, rectangular shape still, can be other different shape.

In this sensor module 21, according to vertical circumferential mode of quadrate part spare 1 outward of sensor installing component 28, by contact fixed part 28a, the 28b of sensor installing component 28, the interior week of being fixed in foreign side's parts 1.Fixing by bolt of these contacts fixed part 28a, the relative foreign side of 28b parts 1 fixing, the mode such as bonding of bonding agent realizes.Position beyond contact fixed part 28a, the 28b of sensor installing component 28 produces the gap between the inner peripheral surface of itself and foreign side's parts 1.The 1st contact fixed part 28a of any one among contact fixed part 28a, the 28b is because of acting on the load on foreign side's parts 1, and foreign side's parts 1 are fixed on foreign side's parts 1 at the circumferential position of maximum distortion radially.The 2nd contact fixed part 28b is fixed in the position of its distortion radially less than the said fixing position.

In the occasion of application example, if on wheel hub 9 imposed load, then by rolling body 5,1 distortion of foreign side's parts, this distortion passes to the sensor installing component 28 in the interior week that is installed on foreign side's parts 1,28 distortion of sensor installing component.By resistive element 25, measure the distortion of this sensor installing component 28.At this moment, sensor installing component 28 follow foreign side's parts 1 sensor installing component 28 fixed position distortion radially and be out of shape, but, compare with foreign side parts 1, sensor installing component 28 is circular-arc, and notch part 28c is set, position at this notch part 28c, rigidity reduces, and thus, is presented in the resistive element installation position of sensor installing component 28 greater than the distortion of the distortion of foreign side's parts 1.Thus, can pass through resistive element 25, correctly detect the microdeformation of foreign side's parts 1.

At this application example, can pass through sensor signal processing circuit shown in Figure 1 equally, same as described above, the output of resistive element 25 is handled.

In above-mentioned application example, sensor module 21 is arranged on the inner peripheral surface as foreign side's parts 1 of fixation side parts, and still, sensor module also can be arranged on the end face of foreign side's parts 1.Figure 77 represents that sensor module 21 is arranged at the example on the end face of inboard of foreign side's parts 1, and Figure 78 represents that sensor module 21 is arranged at the example on the end face in the outside of foreign side's parts 1.

In addition, in the respective embodiments described above, the occasion that external quadrate part spare is the fixation side parts is illustrated, but, the wheel bearing that the present invention is the fixation side parts applicable to interior quadrate part spare also, in this occasion, sensor module 21 is arranged on the side face or end face of interior quadrate part spare.

In addition, in the respective embodiments described above, occasion to the wheel bearing that is applicable to the 3rd die is illustrated, but, the present invention also applicable to the wheel of the 1st or the 2nd die of the separate parts of bearing portions and wheel hub with supporting, the wheel bearing of the 4th die that the part of interior quadrate part spare is made of the outer ring of velocity joint.In addition, the wheel bearing that this wheel bearing is also used applicable to engaged wheel, in addition, also applicable to the wheel bearing of the taper roller type of each die.

The bearing apparatus for wheel that constitutes the basic scheme of the present invention of above explanation relates to following wheel bearing, and its week that included forms foreign side's parts of many row's rolling surfaces; Form the interior quadrate part spare of the rolling surface of facing with the rolling surface of these foreign side's parts; Jie is located at the many rows rolling body between two rolling surfaces; Sealing mechanism with the end seal between above-mentioned foreign side parts and the interior quadrate part spare, rotatably with wheel support on car body, endless member is installed on the side face or end face of the fixation side parts in above-mentioned foreign side parts and the interior quadrate part spare, this endless member is at pars intermedia, has the 1st noncontact annulus that does not contact with the fixation side parts, has the 1st contact annulus that contacts with the fixation side parts in a side, opposite side have following (A) and (B) in any one, (A) refer to the 2nd noncontact annulus of its wall thickness greater than above-mentioned the 1st noncontact annulus; (B) the 2nd contact annulus that refers to contact with the fixation side parts; Occasion at above-mentioned (A), at above-mentioned the 1st noncontact annulus, the sensor of the distortion of measuring endless member is set, in the occasion of above-mentioned (B), at the 1st noncontact annulus or the 1st contact annulus that wall thickness is set with minimum degree, the sensor of the distortion of measuring annulus is set.

As being not the form of the application example of prerequisite, comprise following type with above-mentioned basic scheme.

(form 1)

The wheel bearing that has sensor of the form 1 of application example of the present invention relates to following wheel bearing, and it forms foreign side's parts of many row's rolling surfaces in interior week; Form the interior quadrate part spare of the rolling surface of facing with the rolling surface of these foreign side's parts; Jie is located at the many rows rolling body between two rolling surfaces; Sealing mechanism with the end seal between above-mentioned foreign side parts and the interior quadrate part spare, rotatably with wheel support on car body, it is characterized in that endless member is installed on the side face of the fixation side parts in above-mentioned foreign side parts and the interior quadrate part spare, a plurality of deformation-sensors of the distortion of measuring this endless member are installed on this endless member, above-mentioned sealing mechanism is set on this endless member.Such as, quadrate part spare is the fixation side parts outside, interior quadrate part spare is the occasion of rotation side component, and above-mentioned endless member is installed on the quadrate part spare outside.

If escort vehicle travels, imposed load on the rotation side component, then by rolling body, the fixation side part distortion, this distortion deforms endless member.Be arranged at the distortion of the deformation-sensor detection endless member on the endless member.If in advance by experiment, simulation and calculate relation between distortion and the load then can be according to the output of deformation-sensor, the load of detection effect on wheel etc.That is,, can infer the external force that acts on wheel bearing by the output of above-mentioned deformation-sensor, or the acting force between tire and the road surface, or the precompressed amount of wheel bearing.In addition, the load that this can have been detected etc. is used for the vehicle control of automobile.

Have in the wheel bearing of sensor at this, owing on the endless member on the side face that is installed on the fixation side parts, deformation-sensor is installed, so can compactly load transducer be arranged on the vehicle.Because endless member is the simple parts that are installed on the fixation side parts, thus can be by deformation-sensor be installed thereon, and the property produced in batches is good, can seek the reduction of cost.

In addition, owing on this endless member sealing mechanism is set, the core iron of endless member double as sealing mechanism thus, can make the wheel bearing that has sensor compact vertically, but and low price ground have sealing function, seek the further reduction of cost.

(form 2)

Shown in Figure 62～Figure 65, the wheel bearing that has sensor of the form 2 of application example of the present invention relates to following wheel bearing, and its week that included forms foreign side's parts of many row's rolling surfaces; Form the interior quadrate part spare of the rolling surface of facing with the rolling surface of these foreign side's parts; Jie is located at the many rows rolling body between two rolling surfaces, rotatably with wheel support on car body, it is characterized in that endless member is installed on the end face of the fixation side parts in above-mentioned foreign side parts and the interior quadrate part spare, a plurality of deformation-sensors that detect the distortion of this endless member are installed on the above-mentioned endless member.

In form 2, if follow wheel to travel, imposed load on the rotation side component, then by rolling body, the fixation side part distortion, this distortion makes endless member or sensor installing component produce distortion.Be arranged at deformation-sensor on endless member or the sensor installing component and detect the distortion of endless member or sensor installing component.If in advance by experiment or simulation, calculate the relation between distortion and the load, then can be according to the output of deformation-sensor, the load of detection effect on wheel etc.That is, can infer the external force that acts on wheel bearing by the output of above-mentioned deformation-sensor, or the acting force between tire and the road surface, or the precompressed amount of wheel bearing.In addition, the load that detected etc. can be used for the vehicle control of automobile.

Have in the wheel bearing of sensor at this, owing on endless member that is installed on the fixation side parts or sensor installing component, deformation-sensor is installed, so load transducer can be set on vehicle compactly.Because endless member and sensor installing component are the simple parts that are installed on the fixation side parts, so by deformation-sensor is mounted thereon, the property produced in batches is good, can seek the reduction of cost.

In addition, in form 2, endless member or sensor installing component are installed on the end face of fixation side parts.Because the rigidity of the end face of fixation side parts presents so be out of shape significantly because of other the part of wall thickness less than the fixation side parts.Thus, the distortion of fixed part passes to endless member or sensor installing component, by deformation-sensor, measures it, and thus, sensitivity that can be good detects the distortion of fixation side parts.

In addition, around the end face of fixation side parts, other parts are few, have the space of broad.Thus, the design freedom height of endless member or sensor installing component, these parts can be to be and are suitable for the shape that good sensitivity detects the distortion of fixation side parts.In addition, it is installed easily.

(form 3)

Shown in Figure 66～Figure 69, the wheel bearing that has sensor of the invention of the form 3 of application example of the present invention relates to following wheel bearing, and its week that included forms foreign side's parts of many row's rolling surfaces; Form the interior quadrate part spare of the rolling surface of facing with the rolling surface of these foreign side's parts; Jie is located at the many rows rolling body between two rolling surfaces, rotatably with wheel support on car body, it is characterized in that sensor module is installed on the end face of the fixation side parts in above-mentioned foreign side parts and the interior quadrate part spare, this sensor module is formed by sensor installing component and the deformation-sensor that is installed on this sensor installing component, the sensor installing component comprises relative said fixing side component, the contact fixed part at least two positions, between adjacency contact fixed part, at at least 1 position, has notch part, at this notch part, above-mentioned deformation-sensor is set.

In form 3, because the sensor installing component has the relative fixed side component, the contact fixed part at least two positions, between the contact fixed part of adjacency, has notch part at least 1 position, at this notch part, deformation-sensor is set, so the deformation-sensor of sensor installing component the reduction of position because of its rigidity be set, produce distortion greater than the fixation side parts, sensitivity that can be good detects the distortion of fixation side parts.

(form 4)

Shown in Figure 70～Figure 73, the wheel bearing that has sensor of the invention of the form 4 of application example of the present invention relates to following wheel bearing, and its week that included forms foreign side's parts of many row's rolling surfaces; Form the interior quadrate part spare of the rolling surface of facing with the rolling surface of these foreign side's parts; Jie is located at the many rows rolling body between two rolling surfaces, rotatably with wheel support on car body, the sensor installing component that it is characterized in that ring-type is installed on the side face or end face of the fixation side parts in above-mentioned foreign side parts and the interior quadrate part spare, on the surface of this sensor installing component, dielectric film is set, on this dielectric film, form the resistive element of the distortion of measuring the sensor installing component by surface treatment.

Have in the wheel bearing of sensor at this, because the resistive element that deformation detection is used is installed on the sensor installing component that is installed on the fixation side parts, so load transducer can be arranged on the vehicle compactly.Because the sensor installing component is the simple parts that are installed on the fixation side parts, so by resistive element is mounted thereon, the property produced in batches is good, can seek the reduction of cost.

In addition, have in the wheel bearing of sensor at this, as deformation detection mechanism, do not adopt the deformation-sensor of manufactured goods, and the resistive element that deformation detection is used is set being located on the lip-deep dielectric film of sensor installing component, as deformation detection mechanism, thus, but low price ground makes sensor module with it.If by coverlay, cover around the surface of resistive element and its, because resistive element is firmly fixed on the sensor installing component, thus there is not resistive element to come off, the situation that occurrence positions is offset, the reliability height that measuring ability is kept.

(form 5)

Shown in Figure 74～Figure 78, the wheel bearing that has sensor of the form 5 of application example of the present invention relates to following wheel bearing, and its week that included forms foreign side's parts of many row's rolling surfaces; Form the interior quadrate part spare of the rolling surface of facing with the rolling surface of these foreign side's parts; Jie is located at the many rows rolling body between two rolling surfaces, rotatably with wheel support on car body, it is characterized in that the sensor installing component is installed on the side face or end face of the fixation side parts in above-mentioned foreign side parts and the interior quadrate part spare, the sensor installing component comprises relative said fixing side component, the contact fixed part at least two positions, between the contact fixed part of adjacency, has notch part at least 1 position, on the surface of this notch part, dielectric film is set, on this dielectric film, by surface treatment, form the resistive element of the distortion of measuring the sensor installing component.

In form 5, because the sensor installing component comprises the relative fixed side component, the contact fixed part at least two positions is between the contact fixed part of adjacency, at least 1 position, has notch part, at this notch part, the deformation detection resistive element is set, so the resistive element of sensor installing component the reduction of position because of rigidity be set, generation is greater than the distortion of fixation side parts, and sensitivity that can be good detects the distortion of fixation side parts.

In addition, in form 4 or form 5, the sensor installing component can be formed by the insulativity material.The insulativity material is preferably such as, siliconized plate.

If by the insulativity material, form the sensor installing component, because dielectric film is unwanted,, make easily so sensor module is simple in structure.

Claims (18)

1. wheel bearing that has sensor, rotatably with wheel support on car body, it comprises: the foreign side's parts that form many row's rolling surfaces week; Form the interior quadrate part spare of the rolling surface of facing with the rolling surface of these foreign side's parts; Jie is located at the many rows rolling body between two rolling surfaces; Sealing mechanism with the end seal between above-mentioned foreign side parts and the interior quadrate part spare;

Endless member is installed on the side face or end face of the fixation side parts in above-mentioned foreign side parts and the interior quadrate part spare, this endless member has the 1st noncontact annulus that does not contact with the fixation side parts at pars intermedia, a side have contact with the fixation side parts the 1st the contact annulus, opposite side have following (A) and (B) in any one;

(A) wall thickness is greater than the 2nd noncontact annulus of above-mentioned the 1st noncontact annulus;

(B) the 2nd contact annulus that contacts with the fixation side parts;

Occasion at above-mentioned (A), at above-mentioned the 1st noncontact annulus, the sensor of the distortion of measuring endless member is set, occasion at above-mentioned (B), in above-mentioned the 1st noncontact annulus, the 1st contact annulus, the 2nd contact annulus, the wall thickness of the 1st noncontact annulus or the 1st contact annulus is set at littler, is set at the sensor that the 1st noncontact annulus littler than other parts or the 1st contact are provided with the distortion of measuring endless member on the annulus at wall thickness than other parts.

2. the wheel bearing that has sensor according to claim 1, the sensor that it is characterized in that being arranged on above-mentioned the 1st noncontact annulus is a sensor of measuring the axial distortion of above-mentioned endless member.

3. the wheel bearing that has sensor according to claim 1 is characterized in that above-mentioned the 2nd noncontact annulus is formed by outstanding flange portion, and the formation direction of described flange portion is opposite diametrically with the direction of above-mentioned the 1st contact annulus.

4. the wheel bearing that has sensor according to claim 1 is characterized in that the sensor that is arranged on above-mentioned the 1st contact annulus is the diastrophic sensor of mensuration.

5. the wheel bearing that has sensor according to claim 1 is characterized in that the said fixing side component is foreign side's parts.

6. the wheel bearing that has sensor according to claim 1 is characterized in that plastic yield does not take place above-mentioned endless member to above-mentioned fixation side parts press fit the time.

7. the wheel bearing that has sensor according to claim 6, it is characterized in that in the external force that acts on the wheel bearing, or the peaked occasion of the expectation of the acting force between tire and the road surface, the not plastic yield of above-mentioned endless member, or and between the said fixing side component do not produce the gap.

8. the wheel bearing that has sensor according to claim 1 is characterized in that above-mentioned endless member is the punch process part.

9. the wheel bearing that has sensor according to claim 1 is characterized in that being provided with above-mentioned sealing mechanism on above-mentioned endless member.

10. the wheel bearing that has sensor according to claim 3, it is characterized in that above-mentioned endless member is installed on the end face of said fixing side component, measure the deformation-sensor of the sensor of above-mentioned distortion for the axial distortion of the above-mentioned endless member of mensuration.

11. the wheel bearing that has sensor according to claim 1, it is characterized in that above-mentioned endless member is installed on the end face of said fixing side component, the sensor of measuring above-mentioned distortion is installed on above-mentioned the 1st noncontact annulus of above-mentioned (A) occasion, and this sensor is the deformation-sensor of the axial distortion of the above-mentioned endless member of mensuration.

12. the wheel bearing that has sensor according to claim 1, it is characterized in that above-mentioned endless member is installed on the end face of said fixing side component, the sensor of measuring above-mentioned distortion is installed on above-mentioned the 1st noncontact annulus of above-mentioned (B) occasion, and this sensor is for measuring the diastrophic deformation-sensor of above-mentioned endless member.

13. the wheel bearing that has sensor according to claim 1, it is characterized in that above-mentioned endless member is installed on the end face of said fixing side component, the sensor of measuring above-mentioned distortion is installed on above-mentioned the 1st contact annulus of above-mentioned (B) occasion, and this sensor is the deformation-sensor of the axial deformation of the above-mentioned endless member of mensuration.

14. the wheel bearing that has sensor according to claim 1, it is characterized in that in the sensor, on the surface of above-mentioned endless member, dielectric film is set, on this dielectric film, forms the resistive element of the distortion of measuring above-mentioned endless member by surface treatment.

15. the wheel bearing that has sensor according to claim 1, it is characterized in that in the sensor of measuring above-mentioned distortion, on the surface of above-mentioned the 1st noncontact annulus of above-mentioned (A) occasion, dielectric film is set, on this dielectric film, form the resistive element of the distortion of measuring above-mentioned endless member by surface treatment, this sensor is the deformation-sensor of the axial distortion of measuring above-mentioned endless member.

16. the wheel bearing that has sensor according to claim 3, it is characterized in that in the sensor of measuring above-mentioned distortion, on the surface of above-mentioned the 1st noncontact annulus, dielectric film is set, on this dielectric film, form the resistive element of the distortion of measuring above-mentioned endless member by surface treatment, this sensor is the deformation-sensor of the axial distortion of measuring above-mentioned endless member.

17. the wheel bearing that has sensor according to claim 1, it is characterized in that in the sensor of measuring above-mentioned distortion, on the surface of above-mentioned the 1st noncontact annulus of above-mentioned (B) occasion, dielectric film is set, on this dielectric film, form the resistive element of the distortion of measuring above-mentioned endless member by surface treatment, this sensor is the deformation-sensor of the axial distortion of measuring above-mentioned endless member.

18. the wheel bearing that has sensor according to claim 1, it is characterized in that in the sensor of measuring above-mentioned distortion, above-mentioned (B) occasion above-mentioned the 1st the contact annulus the surface on dielectric film is set, on this dielectric film, form the resistive element of the distortion of measuring above-mentioned endless member by surface treatment, this sensor is for measuring the diastrophic deformation-sensor of above-mentioned endless member.

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