CN101529105B - Outer ring for rocking bearing, retainer for rocking bearing, rocking bearing, and air disc brake - Google Patents

Abstract

The present invention discloses an outer ring (11a) for a rocking bearing has a raceway surface (12a) on the bore side and flanges (13a, 13b) formed by bending both ends in the axial direction of the outer ring to the bore side. The flanges (13a, 13b) have bends (17a, 17b) for holding a retainer placed on the bore side. By this, the bends (17a, 17b) can hold the retainer. Even if the retainer tends to move to the bore side of the outer ring (11a), the bends (17a, 17b) catch the retainer to prevent it from moving to the bore side, preventing falling of rollers and the retainer out of place.

Description

Outer ring for rocking bearing, retainer for rocking bearing, oscillation bearing and air-pressure disc brake device

Technical field

The present invention relates to outer ring for rocking bearing, retainer for rocking bearing, oscillation bearing and air-pressure disc brake (air disc brake) device.

Background technique

In Heavy Duty Commercial Car or truck, passenger vehicle etc., use and utilized compressed-air actuated air-pressure disc brake device.At this, the structure of common air-pressure disc brake device is described simply.Figure 40 is the general profile chart of the structure of the common air-pressure disc brake device of expression.With reference to Figure 40 as can be known, air-pressure disc brake device 101 comprises: the break cylinder (not shown) that possesses actuator rod 102; Controlling rod 103 with the binding of actuator rod 102 1 ends; The rotating member 104 that links with the other end of controlling rod 103; Supporting rotating member 104 makes its rotation oscillation bearing 105 freely; Be arranged at the joint 107 away from the position of the rotating center of rotating member 104; The transverse arm 106 that one end and joint 107 link; The brake pad (not shown) of interlock in about transverse arm 106; Rotor between the brake pad about being disposed at (not shown).Air-pressure disc brake device 101 sandwiches rotor by coming the pressurized air of self brake cylinder via the brake pad about the usefulness such as controlling rod 103.

In addition, the air-pressure disc brake device of said structure is disclosed among the flat 8-504250 communique of Japanese Unexamined Patent Application Publication or the WO2006/002905A1.

The structure of the oscillation bearing that simple declaration comprises in above-mentioned air-pressure disc brake device.Oscillation bearing possesses: outer ring for rocking bearing; A plurality of rollers; The retainer that keeps roller.Outer ring for rocking bearing is not to be connected to ring-type, with the shape of cylindrical structural member in circumferential arbitrarily two places cut-out.About retainer also be in the same manner with cylindrical structural member in the shape that circumferential any two places cut off, be the shape along outer ring for rocking bearing.So the oscillation bearing of structure is the recess of retainer of at first roller being packed into, and the internal side diameter that the retainer that keeps roller is disposed at outer ring for rocking bearing is assembled.

At this, after having assembled oscillation bearing, retainer is limited the movement to internal side diameter.If like that, then for example, when the oscillation bearing with assembling was installed on the air-pressure disc brake device of said structure, retainer was to the internal diameter side shifting sometimes, and roller and retainer come off from outer ring for rocking bearing.

Summary of the invention

The object of the present invention is to provide the outer ring for rocking bearing that comes off that has prevented roller and retainer.

The oscillation bearing device that provides assembling performance good is provided.

The air-pressure disc brake device that provides producibility good is provided.

Outer ring for rocking bearing of the present invention comprises plane of trajectory orbital at internal side diameter, and possesses the lip part of axial two end part to the internal side diameter bending.Lip part at least one side is provided with bending part, and described bending part is to axial plane of trajectory orbital side bending, and clamping is configured in the retainer of internal side diameter.

By as above consisting of, when the assembling of oscillation bearing, when the retainer that has kept roller is disposed at the aperture surface of outer ring for rocking bearing, can utilize bending part clamping retainer.If arrange like that, even then retainer moves to the internal side diameter of outer ring for rocking bearing, retainer is stuck in bending part, and the restriction retainer is to the movement of internal side diameter.Thereby can prevent that roller and retainer from coming off from outer ring for rocking bearing.

Preferred bending part upwards connects setting in the week of lip part.By such setting, can be in circumferential broad range the clamping retainer, therefore, can prevent more reliably coming off of retainer and roller.

And then preferred bending part is arranged at the lip part of both sides.If arrange like this, the bending part clamping retainer that then can utilize the lip part side in both sides to arrange.If arrange like that, then can prevent more reliably coming off of retainer and roller.

And then preferred outer ring for rocking bearing is to be that the use material of 0.15～1.1 % by weight has been implemented nitrocarburizing and processed and form to Kohlenstoffgehalt.By like this, can make at an easy rate high-intensity outer ring for rocking bearing.Such outer ring for rocking bearing has high load capacity, and therefore, damaged possibility is few.In addition, the intensity of bending part also uprises, and therefore, can prevent more reliably coming off of retainer and roller.

In addition, the Kohlenstoffgehalt of the use material of outer ring for rocking bearing is that 0.5～1.1 % by weight also can.By such formation, processability becomes well, can pass through punch process, and precision forms outer shape well.In addition, do not process even do not implement nitrocarburizing, can access as the required hardness of outer ring for rocking bearing yet.If like that, the distortion of the outer ring for rocking bearing in the time of then can reducing heat treatment.Thereby, can provide precision good, and cheap, and the outer ring for rocking bearing with high load capacity.

And then the outer ring for rocking bearing that preferred Kohlenstoffgehalt is 0.5～1.1 % by weight has been implemented the bright quenching processing.In addition, Kohlenstoffgehalt is that the outer ring for rocking bearing of 0.5～1.1 % by weight has been implemented high frequency hardening and processed and also can.Such Quenching Treatment can be carried out at an easy rate.

In other aspects of the present invention, oscillation bearing possesses: a plurality of rollers, and it is disposed on the plane of trajectory orbital; Retainer, it comprises the recess that keeps roller and is positioned at the axial both end sides of recess and a pair of linking department that upwards connects in week; Above-mentioned any outer ring for rocking bearing.

In such oscillation bearing, the possibility that does not have roller and retainer to come off from outer ring for rocking bearing.In addition, when assembling, can suppress separating or departing from of roller and retainer and outer ring for rocking bearing, therefore, can also prevent from installing bad.Thereby, can make assembling performance good.

Preferably be provided with the engagement portion that engages with bending part at linking department.By like this, can make the engaging of bending part and engagement portion, can prevent more reliably coming off of retainer and roller, and can further make assembling performance good.

And then at least one of preferred outer ring for rocking bearing or roller has nitrogen-enriched layer, and the granularity of austinite grain size numbering is above No. 10, and the remaining austenite amount is below the above 25 volume % of 11 volume %, and nitrogen content is below above 0.7 % by weight of 0.1 % by weight.

If make the rolling bearing compactnesses such as oscillation bearing, then increase the load that per unit area is applied, therefore, the problem that average life reduces.Therefore, can not in the compactness of realizing rolling bearing, suppress the reduction in life-span.

At this, surpass No. 10 degree by fine the turning to of austenite grain with above-mentioned bearing components, can significantly improve rolling fatigue life.Under the granularity of austenite particle diameter is numbered situation below No. 10, can not significantly improve rolling fatigue life, therefore, be made as and surpass No. 10 scope.Usually, be good more than No. 11.In addition, also the average crystallite particle diameter can be made as below the 6 μ m.The austenite particle diameter is more thin more preferred, but usually is difficult to obtain surpassing No. 13 granularity numbering.Above-mentioned crystal size can be obtained by the usual way of stipulating in JIS, also can utilize microtomy to obtain corresponding to the Mean particle diameter of above-mentioned crystal size numbering and convert.

In addition, austenite crystal does not change in the skin section that nitrogen-enriched layer exists, and is not changing than its inboard inside yet.Thereby, as the position of the object of the scope of above-mentioned crystal size numbering as skin section and inside.At this, the austenite crystal grain refers to add the austenite crystal of pining for the phase transformation attitude in quenching, and this refers to by cooling, after metamorphosis is austenite, as the remaining crystal grain of the historical record in past.

In addition, if the remaining austenite amount, then has the tendency that the surface failure life-span reduces greatly less than 11 volume %, if the remaining austenite amount is greater than 25 volume %, then the remaining austenite quantitative change must disappear with common difference of having carried out the situation that nitrocarburizing processes, therefore dimensional changes variation year in year out.

The remaining austenite amount is the value at the 50 μ m places, top layer of the rolling surface after grinding, for example can be by relatively measuring based on the diffracted intensity of the martensite d (211) of X-ray diffraction and remaining austenite γ (220).In addition, austenite is nonmagnetic material mutually, and ferritic phase is the strong magnetism body, utilizes this fact, can also utilize magnetic sky equality to obtain magnetizing force and measure.In addition, can use commercially available testing apparatus, measure simply.

The nitrogen-enriched layer layer of nitrogen content that has been the increase that forms on the top layer for example, can form by processing such as nitrocarburizing, nitrogenize, nitridings.If the nitrogen content of nitrogen-enriched layer less than 0.1 % by weight, does not then have effect, especially the surface failure life-span reduces.If nitrogen content is greater than 0.7 % by weight, then produce the hole that is called as pore, or remaining austenite becomes too much, can not manifest hardness, low lifetime becomes.The nitrogen content of nitrogen-enriched layer is the value at the 50 μ m places, top layer of the rolling surface after the grinding, for example, can utilize EPMA (Electron Probe Micro-Analysis: the microanalysis of wavelength dispersion type X ray) measure.

From the foregoing, by such formation, can realize comprising the long lifetime of the oscillation bearing of such outer ring for rocking bearing or roller.

And then preferably passing through the mode that is kept by this bending part behind the bending part according to retainer, the chimeric admissible set of the chimeric buckle of buckle section is allowed at least any setting in retainer and bending part.

By such formation, passing through bending part, when the bending part of outer ring for rocking bearing keeps retainer, that can utilize in retainer and bending part at least any setting allows the chimeric admissible set of the chimeric buckle of buckle section, make retainer and outer ring for rocking bearing buckle chimeric, at the bending part maintenance retainer of outer ring for rocking bearing.Bending part keeps in the mode of clamping retainer, therefore, can prevent that retainer is from the separation of outer ring for rocking bearing.In addition, the chimeric admissible set of such buckle section utilizes the resiliently deformable of retainer or outer ring for rocking bearing, thereby when retainer is assembled into outer ring for rocking bearing, even do not apply brute force, also can easily pack into.In addition, when assembling, can prevent the breakage of retainer or outer ring for rocking bearing.Thereby, can make the assembling performance of oscillation bearing good.

And then the preferred chimeric admissible set of buckle section comprises the chimeric pawl of giving prominence to vertically from the end face of linking department.By such setting, can utilize vertically outstanding chimeric pawl, it is chimeric to carry out buckle.

And then preferably be provided with chamfering in the bight of the outside diameter of chimeric pawl.By such setting, can utilize the chamfering that arranges at chimeric pawl, it is chimeric to carry out buckle.If like that, it is chimeric then can successfully to carry out buckle.Thereby, can make assembling performance better.

And then preferably be provided with chamfering in the bight of the internal side diameter of bending part.By such setting, can be by the chamfering that arranges at bending part, it is chimeric to carry out buckle.If like that, it is chimeric then can successfully to carry out buckle.Thereby, can make assembling performance better.

And then preferred chimeric pawl is arranged at the circumferential position that possesses recess.The circumferential position that is provided with recess does not link in the axial direction.If then can easily be provided with like that, the retainer resiliently deformable vertically of the circumferential position of chimeric pawl.Thereby, can make assembling performance better.

And then preferred chimeric pawl is arranged at the linking department of both sides, and the circumferential position of the chimeric pawl that arranges at the linking department of a side is different with the circumferential position at the chimeric pawl of the linking department setting of opposite side.By such setting, can make the chimeric pawl of linking department setting of a side different from the circumferential position that chimeric pawl in the linking department setting of opposite side carries out resiliently deformable.Thereby, can easily make in the axial direction resiliently deformable of retainer, can make assembling performance better.

And then the preferred chimeric admissible set of buckle section comprises the slit of the shape that is arranged at linking department and radially is recessed into.By like this, can utilize the slit of radially recessed shape, it is chimeric to carry out buckle.

And then the axial length dimension of preferred slit is made as W ₁, the axial length dimension of linking department is made as W ₂Situation under, have 0.2W ₂＜W ₁＜0.8W ₂Relation, the length dimension radially of slit is made as H ₁, the length dimension radially of linking department is made as H ₂Situation under, have 0.2H ₂＜H ₁＜0.8H ₂Relation.By such setting, can suitably carry out the resiliently deformable of the linking department of buckle when chimeric.That is, be made as above-mentioned scope by the size relationship with slit, can make the resiliently deformables such as retainer with suitable power, and it is chimeric to carry out buckle in the situation that does not make the breakages such as retainer.

And then preferably be provided with protuberance at the assigned position of the axial end face of linking department, be provided with claw at outer ring for rocking bearing, described claw retainer with respect to outer ring for rocking bearing when week upwards having moved established amount and the protuberance butt, the amount of movement of restriction retainer.

By such formation, even retainer is upwards mobile in week, the protuberance that arranges at the assigned position of linking department also with the claw butt that arranges at outer ring for rocking bearing.If then retainer can not circumferentially be moved further like that.Like this, can limit the circumferential movement of retainer.In addition, the oscillation bearing of such structure can be set the circumferential amount of movement of retainer arbitrarily by protuberance being arranged at arbitrarily position.If like that, then can be with the amplitude work larger than the circumferential end of outer ring for rocking bearing.In addition, do not need to arrange new member.Thereby, can with the structure of cheapness, reliably guarantee the operating range of retainer.In addition, in such oscillation bearing, the possibility that comes off of retainer is few, therefore, can make assembling performance good.

And then the assigned position of preferred protuberance than at the recess of circumferential outermost configuration by circumferential inboard, in the part of the retainer circumferential distolateral outstanding position from outer ring for rocking bearing, the movement of restriction retainer.By like this, even when the assigned position of protuberance is located at than the recess of circumferential outermost place configuration by circumferential place, inboard, also can be with the circumferential end of retainer from the outstanding state in the end of a side of outer ring for rocking bearing, the circumferential movement of restriction retainer, and in addition regulation.Thereby, can further reliably guarantee the operating range of retainer.

And then the retainer in the preferred outstanding position from the circumferential length dimension of the overhang of outer ring for rocking bearing be from the end of a side of retainer to the tip side in a side of retainer arrange below the circumferential length dimension of the recess that circumferential outermost disposes.By like this, can prevent from coming off at the roller that the recess that outermost disposes keeps.Thereby, can make the assembling performance of oscillation bearing better.

And then preferred claw and protuberance are arranged at axial two end part.By like this, make protuberance and claw engaging in axial both end sides, therefore, can make assembling performance better.

In addition, oscillation bearing has: above-mentioned any outer ring for rocking bearing; A plurality of rollers, it is disposed on the plane of trajectory orbital; Retainer for rocking bearing, it has at week upwardly extending a pair of linking department and with the interconnective a plurality of post of a pair of linking department section, be formed with a plurality of recesses that keep roller between the post section of adjacency, the outer diameter part of post section is disposed at the position away from the pitch circle at the rotation center that links roller.

In retainer for rocking bearing, the interval between the roller of adjacency is minimum on pitch circle.Thereby, by post section being disposed at the position away from pitch circle, can reduce the interval between the roller of adjacency.Its result can access the retainer for rocking bearing that has increased the roller number that can accommodate, can access the large oscillation bearing of load capacity.

The outside dimension of preferred post section is made as B ₂, the diameter of pitch circle is made as B ₄Situation under, have B ₂＜0.98 * B ₄Relation.Like this, dispose post section by the inboard at pitch circle, can prevent the coming off to radially inner side of the roller in the recess.In addition, usually utilize outer ring for rocking bearing to prevent the coming off to radial outside of roller.

And then the number of the roller of accommodating in the preferred recess is made as n, and the length of the part that pitch circle and each roller are overlapping is made as l, and the circumferential length of the pitch circle between the rotation center of the roller that the recess at circumferential two ends is accommodated is made as in the situation of L, satisfies following formula 1.

[formula 1]

$0.9<\frac{(n-1)\&times;l}{L}<1.0.$

The occupancy of the roller on the circumference of formula 1 expression pitch circle.With reference to formula 1 as can be known, if the occupancy of roller is below 0.9, then the interval between the roller of adjacency becomes excessive, can not obtain sufficient load capacity.On the other hand, reduced when swinging, may contact between the roller in the situation at the interval between the roller of adjacency.Become like this reason of rupture of oil film or the heat release of roller surface.Therefore, the occupancy of roller need to be less than 1.0.

And then preferred retainer for rocking bearing is formed by the material of the fibrous packing material that comprises polyamide 46 and 5wt%～20wt%.The degrees of freedom of the shape of the resin-made cage that the resin material injection molded is made is high.In addition, by containing the fibrous packing materials such as carbon fiber (carbon fiber) or glass fibre (glassfiber), can guarantee the intensity that retainer is required.

In addition, if the content of fibrous packing material less than 5wt%, then is difficult to obtain the required intensity of retainer for rocking bearing.On the other hand, if greater than 20wt%, the raw-material mobile variation of the resin when then being shaped.Aspect the retainer that this may cause more than shaping recess quantity and post is thin, produce the problems such as gaseous combustion (ガ ス baked け) or lack of fill.And then, if eliminate this problem and improve stuffing pressure, then may produce overlap.Thereby, the preferred above-mentioned scope of the content of fibrous packing material.

Retainer for rocking bearing of the present invention has along a pair of linking department that circumferentially extends with the interconnective a plurality of post of a pair of linking department section, is formed with a plurality of recesses that keep roller between the post section of adjacency.Also have, the outer diameter part of post section is disposed at the position away from the pitch circle at the rotation center that links roller.

In addition, oscillation bearing has: above-mentioned any outer ring for rocking bearing; A plurality of rollers, it is disposed on the plane of trajectory orbital; Retainer for rocking bearing, it has at week upwardly extending a pair of linking department and with the interconnective a plurality of post of a pair of linking department section, between the post section of adjacency, be formed with a plurality of recesses that keep roller, the number of the roller of accommodating at recess is made as n, the angle that the opposed facing wall of the post section of adjacency becomes is made as a, central angle between the rotation center of the roller that the circumferential recess at two ends is accommodated is made as in the situation of θ, satisfies { θ/(n-1) } °＜a＜90 °.

In retainer for rocking bearing, if the angle a that the opposed facing wall of the post section of adjacency becomes diminishes, then can be reduced by the recess quantity that a mould is shaped simultaneously.Thereby from improving the viewpoint of formability, a is preferably large, and the lower limit of a is made as { θ/(n-1) } °.

On the other hand, large if a becomes, then may not in recess, suitably keep roller.Specifically, during in a 〉=90 °, roller is pressed in the power of wall of compression leg section the component F to the directive effect parallel with wall ₁With the component F to the directive effect vertical with wall ₂Become F ₁〉=F ₂If like that, then when swinging, roller jumps onto post section, may contact with the roller of adjacency.This becomes the rupture of oil film of generation roller surface or the reason of heat release.Thereby from the viewpoint of the suitable maintenance of roller, a is preferably little, and the CLV ceiling limit value of a is made as 90 °.

Like this, can access high productivity, the oscillation bearing that load capacity is large.

Retainer for rocking bearing of the present invention has at week upwardly extending a pair of linking department and with the interconnective a plurality of post of a pair of linking department section, is formed with a plurality of recesses that keep roller between the post section of adjacency.Also have, the number of the roller of accommodating at recess is made as n, the angle that the opposed facing wall of the post section of adjacency becomes is made as a, and the central angle between the rotation center of the roller that the circumferential recess at two ends is accommodated is made as in the situation of θ, satisfies { θ/(n-1) } °＜a＜90 °.

In addition, oscillation bearing possesses: outer ring for rocking bearing, and it comprises plane of trajectory orbital at internal side diameter, and has the lip part of axial two end part to the internal side diameter bending; A plurality of rollers, it is disposed on the plane of trajectory orbital; Above-mentioned any retainer for rocking bearing.

In another aspect of this invention, the air-pressure disc brake device possesses above-mentioned any oscillation bearing.

Such air-pressure disc brake device comprises the oscillation bearing that assembling performance is good, therefore, can boost productivity.

Description of drawings

Fig. 1 is the stereogram of the outer ring for rocking bearing of expression one embodiment of the present invention.

Fig. 2 is the stereogram of the retainer that comprises in the oscillation bearing of expression one embodiment of the present invention.

Fig. 3 be in recess arrangement the retainer of state of roller, roller is disposed at the stereogram in the situation of lower side.

Fig. 4 be in recess arrangement the retainer of state of roller, roller is disposed at the stereogram in the situation of lower side.

Fig. 5 is the stereogram of the oscillation bearing of expression one embodiment of the present invention.

Fig. 6 has blocked sectional view in the situation of oscillation bearing shown in Figure 5 with the plane that comprises the engagement portion.

Fig. 7 is the figure from the oscillation bearing shown in Figure 5 of end on observation.

Fig. 8 be among Fig. 7 with the partial enlarged drawing shown in the VIII.

Fig. 9 is the figure that has further amplified Fig. 8.

Figure 10 is the figure of the retainer for rocking bearing of expression another embodiment of the present invention.

Figure 11 has blocked sectional view in the situation of oscillation bearing of the outer ring for rocking bearing that possesses another embodiment of the present invention with the plane that comprises the engagement portion.

Figure 12 has blocked sectional view in the situation of oscillation bearing of the outer ring for rocking bearing that possesses again another mode of execution of the present invention with the plane that comprises the engagement portion.

Figure 13 is illustrated in pack into the sectional view of the state before roller and the retainer of outer ring for rocking bearing.

Figure 14 is illustrated in pack into the sectional view of state of roller and retainer of outer ring for rocking bearing.

Figure 15 is the amplification view of part of the oscillation bearing of expression again another mode of execution of the present invention.

Figure 16 is the figure that is illustrated in the retainer that the oscillation bearing of again another mode of execution of the present invention possesses.

Figure 17 is the sectional view of the oscillation bearing of expression again another mode of execution of the present invention.

Figure 18 is the sectional view of the oscillation bearing of expression again another mode of execution of the present invention.

Figure 19 amplifies and represents the enlarged view of the part of oscillation bearing shown in Figure 17.

Figure 20 is the amplification view that amplifies the part of the oscillation bearing that again another mode of execution of the present invention is shown.

Figure 21 is the amplification view that amplifies the part of the oscillation bearing that again another mode of execution of the present invention is shown.

Figure 22 is the amplification view that amplifies the part of the oscillation bearing that again another mode of execution of the present invention is shown.

Figure 23 is the figure from the oscillation bearing of again another mode of execution of the present invention of end on observation, and expression claw and protuberance be the state of butt not.

Figure 24 is the figure from the oscillation bearing of again another mode of execution of the present invention of end on observation, the state of expression claw and protuberance butt.

Figure 25 is the stereogram that is illustrated in the outer ring for rocking bearing that comprises in the oscillation bearing of again another mode of execution of the present invention.

Figure 26 is the figure of oscillation bearing from comprising of end on observation of outer ring for rocking bearing shown in Figure 25, and expression claw and protuberance be the state of butt not.

Figure 27 is the figure of oscillation bearing from comprising of end on observation of outer ring for rocking bearing shown in Figure 25, and expression claw and protuberance be the state of butt not.

Figure 28 is the flow chart of the representative manufacturing process of expression outer ring for rocking bearing.

Figure 29 is the figure of the heat treatment method of explanation two-stage.

Figure 30 is the figure of variation of the heat treatment method of explanation two-stage.

Figure 31 is that expression has been suitable for the microtissue figure of austenite grain especially in the bearing components of heat treatment mode shown in Figure 29.

Figure 32 is the microtissue figure of austenite grain especially in the bearing components that represents in the past.

Figure 33 is the schematic representation of microtissue shown in Figure 31, represents graphic austenite grain boundary.

Figure 34 is the schematic representation of microtissue shown in Figure 32, represents graphic austenite grain boundary.

Figure 35 is the sectional view of the structure (size) of expression test portion 1～test portion 6.

Figure 36 is the sectional view of the structure (size) of expression test portion 7～test portion 11.

Figure 37 is the plan view of wanting section that life test apparatus is peeled off in expression.

Figure 38 is the sectional view along the XXXVIII-XXXVIII line of Figure 37.

Figure 39 is the general profile chart of part of the air-pressure disc brake device of expression one embodiment of the present invention.

Figure 40 is the general profile chart that represents the part of air-pressure disc brake device in the past.

Embodiment

Below, with reference to the description of drawings embodiments of the present invention.Fig. 1 is the stereogram of the outer ring for rocking bearing of expression one embodiment of the present invention.With reference to Fig. 1, the structure of outer ring for rocking bearing 11a is described.Outer ring for rocking bearing 11a is the shape that cylindrical structural member is cut off at circumferential any two places.Outer ring for rocking bearing 11a comprises the plane of trajectory orbital 12 that roller rolls at internal side diameter.

Be provided with jut 14a, the 14b that extends along internal side diameter in the end of the circumferential side of outer ring for rocking bearing 11a.Retainer in the configuration of the internal side diameter of outer ring for rocking bearing 11a can be upwards mobile in week, but by this jut 14a, 14b, in a side the circumferential movement of tip side restriction.

In addition, between jut 14a, 14b, be provided with tongue-shaped protuberance 15a to the outside diameter bending.On the other hand, the tip side circumferential the opposing party of outer ring for rocking bearing 11a is provided with tongue-shaped protuberance 16a.Utilize this protuberance 15a, 16a, outer ring for rocking bearing 11a is installed on housing (not shown), the circumferential movement of restriction outer ring for rocking bearing 11a is fixed in housing.

Outer ring for rocking bearing 11a possesses lip part 13a, the 13b of axial two end part to the internal side diameter bending.Be limited in the roller of internal side diameter configuration and the moving axially of retainer of outer ring for rocking bearing 11a by this lip part 13a, 13b.

At this, lip part 13a, the 13b in both sides is provided with to axial plane of trajectory orbital 12a side bending, and clamping is disposed at bending part 17a, the 17b of the retainer of internal side diameter.Bending part 17a, 17b are set in week upwards continuous.

Secondly, the oscillation bearing that is included in one embodiment of the present invention is described, is disposed at the structure of retainer of the internal side diameter of outer ring for rocking bearing 11a.Fig. 2 is the stereogram of retainer that is illustrated in the internal side diameter configuration of outer ring for rocking bearing 11a.Fig. 3 and Fig. 4 are the stereograms that the recess 22a that is illustrated in retainer 21a shown in Figure 2 has kept the state of roller 20a.Fig. 3 represents roller 20a is located at the state of lower side, and Fig. 4 represents roller 20a is located at the state of upper side.With reference to Fig. 1～Fig. 4 as can be known, about retainer 21a, also with above-mentioned outer ring for rocking bearing 11a in the same manner for to have cut off the shape of cylindrical structural member at circumferential any two places, be the shape along outer ring for rocking bearing 11a.

Retainer 21a comprises: the recess 22a that keeps roller 20a; And be positioned at recess 22a axial both end sides and upwards link to each other in week namely at upwardly extending a pair of linking department 23a of week, 23b.Keep a roller 20a at each recess 22a.Interval at circumferential end 25a, the 25b of circumferential outermost recess 22a and retainer 21a constitutes larger than the interval between each recess 22a.In addition, the internal side diameter at retainer 21a disposes the rotating member (not shown) that is included in the air-pressure disc brake device.

A pair of linking department 23a, 23b are by between each recess 22a, and the 24a of post section that extends in the axial direction links in the axial direction.The 24a of post section is that pitch diameter is compared with the PCD (PitchCircle Diameter) of the roller 20a that keeps at recess 22a, is arranged at internal side diameter.By such setting, can increase the quantity of the roller 20a that can be kept by retainer 21a.If arrange like that, then can increase the load capacity of the oscillation bearing that comprises such retainer 21a.In addition, after having assembled oscillation bearing, utilize plane of trajectory orbital 12a and the 24a of post section of outer ring for rocking bearing 11a, can keep in the mode that sandwiches roller 20a, the movement radially of restriction roller 20a.

Engagement portion 26a in a pair of linking department 23a, shape that 23b is provided with to be engaged with bending part 17a, 17b.Engagement portion 26a is the shape of giving prominence to vertically from linking department 23a, 23b.Engagement portion 26a does not form along linking department 23a, 23b and upwards connects in week, is provided with a plurality of in the circumferential arbitrarily position of linking department 23a, 23b.

Fig. 5 is the stereogram of the oscillation bearing 30a of expression one embodiment of the present invention.Fig. 6 has blocked sectional view in the situation of oscillation bearing 30a shown in Figure 5 with the cross section that comprises the engagement portion.With reference to Fig. 1～Fig. 6, the structure of the oscillation bearing 30a of one embodiment of the present invention is described.Oscillation bearing 30a comprises: outer ring for rocking bearing 11a; A plurality of roller 20a; The retainer 21a that keeps roller 20a.Oscillation bearing 30a is that the retainer 21a that will keep roller 20a is disposed at the internal side diameter of outer ring for rocking bearing 11a and assembles.

At this, when retainer 21a is disposed at the internal side diameter of outer ring for rocking bearing 11a, make bending part 17a, 17b and engagement portion 26a engaging ground configuration and assembling.By such formation, outer ring for rocking bearing 11a can utilize bending part 17a, 17b and engagement portion 26a, clamping retainer 21a and keeping.If arrange like that, even then in the situation that retainer 21a namely moves to the direction of the arrow A of Fig. 5 and Fig. 6 to the internal side diameter of outer ring for rocking bearing 11a, the engagement portion 26a of retainer 21a also is stuck in bending part 17a, 17b, thereby can limit the movement to internal side diameter of retainer 21a.Thereby, can prevent roller 20a and retainer 21a coming off from outer ring for rocking bearing 11a.In this case, make bending part 17a, 17b and engagement portion 26a engaging, clamping retainer 21a ground keeps, and therefore, can prevent reliably roller 20a and retainer 21a coming off from outer ring for rocking bearing 11a.In addition, the separation of roller 20a or retainer 21a or depart from can not occur yet.Such oscillation bearing 30a reduces the possibility that causes that installation is bad when being installed on air-pressure disc type brake device described later.In addition, in assembling, after roller 20a and retainer 21a were assembled into state shown in Figure 4, the upside from Fig. 4 embedded outer ring for rocking bearing 11a ground and assembles.By like this, do not need roller 20a in bulk, can easily assemble.

And then bending part 17a, 17b upwards conjointly arranged continuously in week, and therefore, no matter the circumferential position of engagement portion 26a all can make bending part 17a, 17b and engagement portion 26a engaging.Thereby, can prevent more reliably coming off of retainer 21a and roller 20a.At this, engagement portion 26a can be the shape that upwards links to each other in week.In this case, utilize to be set at make progress in week bending part 17a, the 17b of connection, can be at circumferential widely scope clamping retainer 21a.Thereby more stably clamping retainer 21a can prevent coming off of roller 20a and retainer 21a.

In addition, bending part 17a, 17b also can not form the structure that upwards connects in week, form the structure that is arranged at circumferential random position.By like this, also can utilize bending part 17a, 17b clamping retainer 21a, prevent coming off of roller 20a and retainer 21a.

In addition, bending part 17a, 17b are arranged at lip part 13a, the 13b of both sides, therefore, and lip part 13a, 13b clamping retainer 21a that can enough both sides and keeping.Thereby, can prevent more reliably coming off of roller 20a and retainer 21a.

At this, in recent years, follow compactness and the high output of air-pressure disc brake device, the requirement that the miniaturization of the oscillation bearing that adopts in the air-pressure disc brake device and high capacity quantize is just at grow.At this, as the method that the high capacity of oscillation bearing quantizes, usually increase roller diameter or increase the roller number.But, increase the requirement that roller diameter runs counter to the miniaturization of oscillation bearing.

On the other hand, make in the situation of retainer at the injection-molded resin material, form recess by mould is extracted to the radial outside of retainer.At this moment, make great efforts to improve formability by the approaching a plurality of recesses that are shaped simultaneously with a mould.But, increase if accommodate the recess number of roller, then number of molds increases, or mould becomes large-scale and structure complicated and cause formability to reduce.In addition, increase unreasonably the recess quantity that forms simultaneously, extract unreasonably in the situation of mould, may cause the breakage of retainer etc.

Thereby the size relationship of 24a of post section when the 24a of post section is set etc. preferably has following relation.Fig. 7 uses with axially vertical plane to block sectional view in the situation of oscillation bearing 30a.Fig. 8 is the enlarged view with the part shown in the VIII among Fig. 7.Fig. 9 is the figure that has further amplified Fig. 8.

With reference to Fig. 7 and Fig. 8 as can be known, the internal side diameter at oscillation bearing 30a disposes rotating member 31a.At this, the internal diameter of the 24a of post section is made as B ₁, external diameter is made as B ₂, the diameter of rotating member 31a is made as B ₃, pitch circle 32a is made as B ₄Situation under, have B ₃≤ B ₁, and B ₂＜0.98 * B ₄Relation.By such formation, can be increased in the quantity of the roller 20a that comprises among the retainer 21a.Thereby, can increase the load capacity of oscillation bearing 30a.

In addition, with reference to Fig. 7～Fig. 9 as can be known, the wall of the rotation of the guide rolls 20a of the 24a of post section (below, be called " guide surface ") forms plane (sectional shape is straight line).And the number that is contained in the roller 20a of recess 22a is made as n, and the angle of the opposed facing wall of the 24a of post section of adjacency is made as a ₁, the central angle of circumferentially accommodating among the recess 22a at two ends between the rotation center of roller 20a is made as in the situation of θ, is set as satisfied { θ/(n-1) } °＜a ₁＜90 °.

If the angle a that the opposed facing wall (referring to " guide surface ") of the 24a of post section of adjacency becomes ₁Diminish, the quantity of the recess 22a that then can be formed simultaneously by a mould reduces.Thereby, from improving the viewpoint of formability, preferred a ₁Greatly, a ₁Lower limit be { θ/(n-1) } °.

On the other hand, if a ₁Become large, then sometimes can not in recess 22a, suitably keep roller 20a.Specifically, roller 20a can be decomposed into to the component F of the directive effect parallel with the wall of the 24a of post section by the power F of the wall of the 24a of compression leg section ₁With the component F to the directive effect vertical with the wall of the 24a of post section ₂And, each component F ₁, F ₂At a ₁Be F in the time of 〉=90 ° ₁〉=F ₂If arrange like that, then when swinging, roller 20a has and jumps onto the possibility that the 24a of post section contacts with the roller 20a of adjacency.This becomes the rupture of oil film on the surface that roller 20a occurs or the reason of heat release.Thereby, from suitably keeping the viewpoint of roller 20a, a ₁Preferably little, a ₁CLV ceiling limit value be 90 °.

In addition, in the above-described embodiment, the retainer that is included in oscillation bearing has post section than pitch circle by internal side diameter, but is not limited to this, on pitch circle or the outside diameter of pitch circle to have a post section also harmless.In addition, also be applicable to not comprise the retainer of linking department.

The retainer for rocking bearing 21b (below, be called " retainer 21b ") of another embodiment of the present invention for example, is described with reference to Figure 10.In addition, the basic structure of retainer 21b and retainer 21a are general, therefore, omit the explanation of universe point, describe centered by dissimilarity.

Retainer 21b has: recess 22b; At a pair of linking department 23a, the 23b that circumferentially extend; The 24b of post section that a pair of linking department 23a, 23b are linked mutually.In addition, the 24b of post section is to extend diametrically across the mode of pitch circle 32b.And, the angle a that the opposed facing wall of the 24b of post section of roller number n, central angle θ and adjacency becomes ₂Be set as satisfied { θ/(n-1) } °＜a ₂＜90 °.

Like this, the angle that becomes by the opposed facing wall with the post section of adjacency is made as in the predetermined range, can let loose to obtain effect of the present invention in the position of configuration post section.

In addition, retainer 21a etc. is from the viewpoints such as batch production, preferred resin system.The resin material that for example, will contain fibrous packing material in polyamide 46 forms by injection molded.As the concrete example of fibrous packing material, can enumerate carbon fiber (carbon fiber) or glass fibre (glass fiber) etc.

In addition, the content of fibrous packing material is in the scope of 5wt%～20wt% with respect to polyamide 46.The necessary intensity such as device 21a if the content of fibrous packing material less than 5wt%, then is difficult to be maintained.On the other hand, if greater than 20wt%, the raw-material mobile variation of the resin when then being shaped.This is because aspect the retainer 21a that quantity is many and post is thin of shaping recess 22a etc. etc., the problems such as gaseous combustion or lack of fill may occur.And then, if eliminate this problem and improve stuffing pressure, then may produce overlap.Thereby the content of optimum fiber shape packing material is above-mentioned scope.

In addition, with reference to Fig. 8, the number that is contained in the roller 20a of recess 22a is made as n, the length of the part that pitch circle 32a and roller 20a is overlapping is made as 1, the circumferential length of pitch circle 32a between the rotation center of the roller 20a that accommodates among the recess 22a with circumferential two ends is made as in the situation of L, and various sizes are set as and satisfy following formula 2.

[formula 2]

$0.9<\frac{(n-1)\&times;l}{L}<1.0.$

The occupancy of roller 20a on the circumference of formula 2 expression pitch circle 32a.With reference to formula 2 as can be known, the occupancy of roller 20a is that the interval between the roller 20a of adjacency becomes excessive, can not obtain sufficient load capacity in the situation below 0.9.On the other hand, in the situation that reduces the interval between the roller 20a of adjacency, when swinging, may contact between the roller 20a.This becomes the rupture of oil film on surface of roller 20a or the reason of heat release.Therefore, the occupancy of roller 20a need to be less than 1.0.

In addition, in the above-described embodiment, bending part is arranged at the lip part of both sides, and the engagement portion is arranged at the linking department of both sides, but is not limited to this, also can be only in engagement portion that lip part and the linking department of a side arranges bending part and engage with it.Figure 11 is the sectional view that is illustrated in the part of oscillation bearing 30c in this case, and is corresponding with Fig. 6.With reference to Figure 11 as can be known, among the outer ring for rocking bearing 11c that in oscillation bearing 30c, comprises, only be provided with to the bending part 17d of axial plane of trajectory orbital 12c side bending in the lip part 13d of side side.Another lip part 13c is the shape to the state of internal side diameter extension.Be provided with to axially outstanding engagement portion 26d at the linking department 23d of the side of retainer 21c.23c does not arrange the engagement portion at another linking department.By such formation, also can make the engagement portion 26d engaging of the bending part 17d of outer ring for rocking bearing 11c and retainer 21c, clamping retainer 21c and keeping.Thereby, can prevent roller 20c and retainer 21c coming off from outer ring for rocking bearing 11c.

In addition, in the above-described embodiment, retainer comprises the engagement portion, but is not limited to this, can be for not comprising the structure of engagement portion.Figure 12 is the sectional view that is illustrated in the part of oscillation bearing 30e in this case, and is corresponding with Fig. 6.With reference to Figure 12 as can be known, among the outer ring for rocking bearing 11e in being included in oscillation bearing 30e, lip part 13e, the 13f in both sides is provided with to bending part 17e, the 17f of axial plane of trajectory orbital 12e side bending.In addition, linking department 23e, the 23f in the both sides of retainer 21e is not provided with outstanding in the axial direction engagement portion.Even in the situation of such structure, also can utilize bending part 17e, the 17f of outer ring for rocking bearing 11e, linking department 23e, the 23f of clamping retainer 21e and keep retainer 21e.If arrange like that, then can prevent roller 20e and retainer 21e coming off from outer ring for rocking bearing 11e.In addition, in this case, also can form the structure that bending part only is set in the lip part side of either side.

At this, retainer 21a remains in bending part 17a, the 17b of outer ring for rocking bearing 11a, but also can be in the mode of retainer 21a by being kept by this bending part 17a, 17b behind bending part 17a, the 17b, any is provided with and allows the chimeric admissible set of the chimeric buckle of buckle section at least in retainer 21a and bending part 17a, 17b.In this case, the chimeric admissible set of buckle section comprises as engagement portion 26a from the end face of linking department 23a, the 23b of retainer 21a to the chimeric pawl of axially giving prominence to, 26b from.Can be chimeric with bending part 17a, 17b buckle as engagement portion 26a, the 26b of chimeric pawl.In addition, in the bight as the outside diameter of engagement portion 26a, the 26b of chimeric pawl chamfering can be set.In addition, also chamfering can be set in the bight of the internal side diameter of bending part 17a, 17b.

At this, the assembling method of oscillation bearing 30g is described.Figure 13 is expression assembling front outer ring for rocking bearing 11g, roller 20g and the sectional view of retainer 21g.In addition, Figure 14 is outer ring for rocking bearing 11g, roller 20g after the expression assembling and the sectional view of retainer 21g.In addition, the basic structure of oscillation bearing 30g, outer ring for rocking bearing 11g, retainer 21g etc., also identical with above-mentioned oscillation bearing 30a etc., therefore, the description thereof will be omitted.With reference to Figure 13 and Figure 14 as can be known, be provided with chamfering 28g as the bight from end face 27g, the 27h of linking department 23g, the 23h of retainer 21g to the outside diameter of engagement portion 26g, the 26h of axially outstanding chimeric pawl.In addition, also be provided with chamfering 28h in the bight of the internal side diameter of bending part 17g, 17h.

At first, keep a plurality of roller 20g at the recess 22g of retainer 21g, form state shown in Figure 4.Then, outer ring for rocking bearing 11g is moved to the direction of arrow A shown in Figure 13.If like that, then bending part 17g, 17h and as engagement portion 26g, the 26h of chimeric pawl resiliently deformable in the axial direction, retainer 21g is by bending part 17g, 17h.Then, bending part 17g, 17h and chimeric as engagement portion 26g, the 26h buckle of chimeric pawl utilize this bending part 17g, 17h to keep retainer 21g.So assemble oscillation bearing 30g.In this case, the retainer 21g of the roller 20g that packs into is moved from the direction opposite with arrow A.

Retainer 21g is held by outer ring for rocking bearing 11g clamping by bending part 17g, 17h, and therefore, retainer 21g can not move to the direction of the arrow A among Figure 13 and Figure 14 retainer 21g is separated from outer ring for rocking bearing 11g.Such buckle is chimeric to utilize the engagement portion 26g of the chimeric pawl of conduct of bending part 17g, the 17h of outer ring for rocking bearing 11g or retainer 21g, the resiliently deformable of 26h, therefore, does not apply brute force when assembling, also can easily pack into.In addition, the outer ring for rocking bearing 11g in the time of can preventing from assembling or the breakage of retainer 21g.Thereby, can make the assembling performance of oscillation bearing 30g good.

And then, be provided with chamfering 28g, 28h in the bight as the internal side diameter of the bight of the outside diameter of engagement portion 26g, the 26h of chimeric pawl and bending part 17g, 17h, therefore, can utilize at the chamfering 28g that arranges as engagement portion 26g, the 26h of chimeric pawl and the chamfering 28h that arranges at bending part 17g, 17h, it is chimeric to carry out buckle.If like that, it is chimeric successfully to carry out buckle.Thereby, can make assembling performance better.In this case, also can only as engagement portion 26g, the 26h of chimeric pawl or the either party of bending part 17g, 17h chamfering be set.In addition, the chamfering that arranges in the bight as the outside diameter of engagement portion 26g, the 26h of chimeric pawl is not limited only to the chamfering at Cutting angle as common chamfering, also comprises as shown in figure 15, and the chamfering 28i of the face on the large inclined-plane of formation is set.

At this, be preferably disposed on the circumferential position that is provided with recess 22g as engagement portion 26g, the 26h of chimeric pawl.The circumferential position that is provided with recess 22g among linking department 23g, the 23h does not link in the axial direction.That is, there is not post section.If like that, can easily be provided with circumferential locational retainer 21g as engagement portion 26g, the 26h of chimeric pawl to axial resiliently deformable.Thereby, can make assembling performance better.

In addition, in the above-described embodiment, linking department in both sides, be provided as the engagement portion of chimeric pawl in circumferential identical position, but be not limited to this, also can form the different structure in circumferential position of the engagement portion of the chimeric pawl of conduct that circumferential position and the linking department at opposite side of the engagement portion of the chimeric pawl of conduct that arranges at the linking department of a side arrange.

Figure 16 is the figure from the retainer in this case of internal side diameter observation.With reference to Figure 16 as can be known, retainer 21i is the structure substantially the same with above-mentioned retainer, comprises recess 22i, a pair of linking department 23i, 23j, the 24i of post section.At this, be provided with vertically engagement portion 26i, the 26j of the outstanding chimeric pawl of conduct from separately end face 27i, 27j at a pair of linking department 23i, 23j.At this, the circumferential position of the engagement portion 26i of the chimeric pawl of conduct that arranges at the linking department 23i of a side and circumferential position at the engagement portion 26j of the chimeric pawl of conduct of the linking department 23i of opposite side setting are different positions.

By such setting, when buckle was chimeric, the engagement portion 26i of the chimeric pawl of conduct that arranges at the linking department 23i of a side can not carry out resiliently deformable in circumferential identical position with engagement portion 26j at the chimeric pawl of conduct of the linking department 23j of opposite side setting.Thereby the circumferential position separately being provided with as engagement portion 26i, the 26j of chimeric pawl can make in the axial direction resiliently deformable of retainer 21i, can make assembling performance better.

Particularly, in the axial overhang that increases as engagement portion 26i, the 26j of chimeric pawl, prevent reliably in the situation of the structure of separating of outer ring for rocking bearing and retainer 21i, if be provided with engagement portion 26i, 26j as chimeric pawl in axial same position, then when assembling, resiliently deformable quantitative change separately as engagement portion 26i, the 26j of chimeric pawl is many, may be damaged as engagement portion 26i, the 26j of chimeric pawl.But, consist of as described above, can prevent the engagement portion 26i as chimeric pawl, the breakage of 26j.

In addition, in the above-described embodiment, the chimeric admissible set of buckle section comprises from the engagement portion of the outstanding chimeric pawl of conduct of the end face of the linking department of retainer, but be not limited to this, the chimeric admissible set of buckle section can form and comprise the linking department that is arranged at retainer, radially the structure of the slit of recessed shape.

Figure 17 is the sectional view that is illustrated in oscillation bearing in this case, and is corresponding with Fig. 6.With reference to Figure 17 as can be known, oscillation bearing 30k is the structure substantially the same with above-mentioned oscillation bearing, comprising: the retainer 21k of outer ring for rocking bearing 11k, roller 20k and maintenance roller 20k.At this, among a pair of linking department 23k, the 23l of retainer 21k, be provided with at the linking department 23k of a side and allow that linking department 23k is at the slit 28k of axial resiliently deformable.Slit 28k be from the outer diametric plane 29k of linking department 23k radially specifically to the recessed shape of internal side diameter, be set to connect along linking department 23k.In addition, the cross section of slit 28k is V word shape roughly.At this, the chimeric admissible set of buckle section comprises slit 28k.Such retainer 21k can resiliently deformable for utilizing slit 28k to make linking department 23k to axially recessed.Thereby, can make linking department 23k and bending part 17k buckle chimeric, make retainer 21k remain in the bending part 17k of outer ring for rocking bearing 11k.Thereby, can make in the same manner assembling performance good with above-mentioned oscillation bearing.

In addition, in the above-described embodiment, only the linking department 23k in a side arranges slit 28k, but is not limited to this, as shown in figure 18, also can slit 28k, 28l be set respectively at linking department 23k, the 23l of both sides.That is, the chimeric admissible set of buckle section can form the slit 28k that is included in linking department 23k, 23l and arranges, the structure of 28l.And then slit 28k, 28l also can be the shape that upwards arranges partly in week, are not set to upwards connect in week.

At this, the size relationship of slit 28k is preferably as follows described.Figure 19 amplifies the enlarged view that slit 28k partly illustrates among the oscillation bearing 30k shown in Figure 17.With reference to Figure 19 as can be known, the axial length dimension of slit 28k is made as W ₁, the axial length dimension of linking department 23k is made as W ₂Situation under, have 0.2W ₂＜W ₁＜0.8W ₂Relation.In addition, the length dimension radially of slit 28k is made as H ₁, the length dimension radially of linking department 23k is made as H ₂Situation under, have 0.2H ₂＜H ₁＜0.8H ₂Relation.At this, the axial length dimension W of slit 28k ₁The length dimension that represents the slit 28k of outer diametric plane 29k side, the length dimension W of linking department 23k ₂The axial length dimension of expression from the end face 27k of linking department 23k to the wall 271 of recess.In addition, the length dimension H radially of slit 28k ₁The length dimension of the radially the most recessed part of expression from outer diametric plane 29k to slit 28k, the length dimension H radially of linking department 23k ₂The length dimension of expression from the outer diametric plane 29k of linking department 23k to aperture surface 29l.

By such setting, can suitably carry out the resiliently deformable of linking department 23k.That is, by being made as 0.2W ₂＜W ₁, 0.2H ₂＜H ₁, can make linking department 23k resiliently deformable, suitably buckle is chimeric.In addition, by being made as W ₁＜0.8W ₂, H ₁＜0.8H ₂, can reduce the possibility of the breakage of the linking department 23k of buckle when chimeric.

In addition, in the above-described embodiment, the cross section of slit forms V word shape, but is not limited to this, can be the slit of other shapes.Figure 20 is the amplification view that is illustrated in the part of oscillation bearing in this case, and is corresponding with Figure 19.With reference to Figure 20 as can be known, oscillation bearing 30m is the structure substantially the same with above-mentioned oscillation bearing, possesses: outer ring for rocking bearing 11m; Roller 20m; The retainer 21m that keeps roller 20m.Linking department 23m at retainer 21m is provided with slit 28m.The end face 27m almost parallel of side wall surface 25m, the 25n of slit 28m and linking department 23m is circular-arc to the cross section of the recessed bottom 26m of internal side diameter.Can be the slit 28m of shape like this.

For the size relationship of slit 28m also in the same manner as described above, the axial length dimension of slit 28m is made as W ₁, the axial length dimension of linking department 23m is made as W ₂Situation under, have 0.2W ₂＜W ₁＜0.8W ₂In addition, the length dimension radially of slit 28m is made as H ₁, the length dimension radially of linking department 23m is made as H ₂Situation under, have 0.2H ₂＜H ₁＜0.8H ₂Relation.By such setting, can suitably carry out the resiliently deformable of linking department 23m in the same manner with the oscillation bearing of above-mentioned Figure 17～shown in Figure 19.At this, the axial length dimension W of slit 28m ₁Length dimension between side wall surface 25m, the 25n of expression slit 28m, the length dimension W of linking department 23m ₂The axial length dimension of expression from the end face 27m of linking department 23m to the wall 27n of recess.In addition, the length dimension H radially of slit 28m ₁The length dimension of expression from outer diametric plane 29m to bottom 26m, the length dimension H radially of linking department 23m ₂The length dimension of expression from the outer diametric plane 29m of linking department 23m to aperture surface 29n.

In addition, in this case, also in the same manner as described above, identical shaped slit can be set at the linking department of both sides.In addition, slit is not limited to Figure 17～shape shown in Figure 20, also the slit of applicable other various shapes.

And then as shown in figure 21, the chimeric admissible set of buckle section can be for be included among the retainer 21p that comprises among the oscillation bearing 30p structure of the end face 28p of the linking department 23p that axial length tilts from from outside diameter to internal side diameter elongatedly.By such setting, also can make bending part 17p and linking department 23p buckle chimeric.

At this, for example, at the linking department of a side slit is set, at the linking department of opposite side chimeric pawl etc. is set, can make up above-mentioned shape the chimeric admissible set of buckle section is arranged at retainer.In this case, for example, at the slit of the recessed shape from aperture surface to outside diameter of the linking department setting by having end face 28p shown in Figure 21, it is chimeric more easily to carry out buckle.

In addition, as shown in figure 22, also can the chimeric admissible set of buckle section be set at bending part 17q.The bending part 17q that the lip part 13q of the outer ring for rocking bearing 11q that comprises in oscillation bearing 30q arranges forms in the axial direction and turns back.In this case, by making vertically resiliently deformable of bending part 17q, can be chimeric with linking department 23q buckle.

In addition, in such oscillation bearing, can be upwards mobile in week at the retainer of the internal side diameter of outer ring for rocking bearing configuration, but in order to prevent that retainer from from the coming off of outer ring for rocking bearing, need to arrange mobile restriction mechanism., arranged to the side-prominent protuberance of internal diameter in the circumferential end of outer ring for rocking bearing in the past, made the circumferential end butt of this protuberance and retainer, limited the circumferential movement of retainer.But, in the situation of mobile restriction mechanism so, can not strengthen the circumferential operating range of guaranteeing retainer.On the other hand, according to TOHKEMY 2003-214330 communique as can be known, as new member, at oscillation bearing controlling rod is set, prevent coming off of rail ring and retainer, by two end part embedded rotating member and the fixed component with controlling rod, the circumferential movement of restriction retainer.But, in TOHKEMY 2003-214330 communique, in the disclosed technology, need to reset controlling rod, from the viewpoint of low cost and the reduction of member number of packages, not preferred.

At this, for example, in the oscillation bearing 30a that comprises the outer ring for rocking bearing 11a shown in Fig. 1 etc., axial two end part at the outer ring for rocking bearing 11a in the zone that is not provided with lip part 13a, 13b can arrange claw, and this claw upwards engaged with the protuberance butt ground that arranges at retainer described later in week.In addition, also can protuberance be set at the axial end face 27a of linking department 23a, 23b, the assigned position of 27b.

Use Figure 23 and Figure 24 to be described.Figure 23 and Figure 24 are the figure from end on observation oscillation bearing 30a, and Figure 23 represents the not state of butt of claw 18a and protuberance 18b, and Figure 24 represents the state of claw 18a and protuberance 18b butt.In addition, calm intelligible viewpoint, in Figure 23 and Figure 24, not shown lip part 13a, 13b.In addition, identical with said structure for the basic structure of oscillation bearing 30a or outer ring for rocking bearing 11a, retainer 21a etc., therefore, the description thereof will be omitted.

With reference to Figure 23, Figure 24 and Fig. 1 etc., claw 18a is arranged at the end with the circumferential end opposition side of a side that is provided with jut 14a, 14b.In addition, claw 18a can be arranged at the position of a side of close end among lip part 13a, the 13b.Protuberance 18b is arranged at the position of close end 25a among end 25a, the 25b.In addition, protuberance 18b is arranged at than the recess 22a in circumferential outermost configuration and leans on circumferential inboard.In addition, at this, form the structure of dual-purpose protuberance 18b and engagement portion 26a, but also protuberance 18b and engagement portion 26a can be set separately.

Retainer 21a made progress in the week of outer ring for rocking bearing 11a, worked within the limits prescribed.Retainer 21a is centered by rotating center 33a, at circumferentially i.e. direction or its opposite direction rotation of the arrow E in Figure 23.At this, though retainer 21a in upwards rotation of week, the protuberance 18b that arranges at the assigned position of linking department 23a, 23b also with the claw 18a butt that arranges at outer ring for rocking bearing 11a.If then retainer 21a can not circumferentially be moved further like that.

Like this, can limit the circumferential movement of retainer 21a.That is, claw 18a at retainer 21a with respect to outer ring for rocking bearing 11a during along circumferential mobile established amount and protuberance 18b butt, the amount of movement of restriction retainer 21a.The oscillation bearing 30a of such structure can at random set the circumferential amount of movement of retainer 21a by protuberance 18b is arranged at the arbitrary position.In this case, protuberance 18b can move to the butt with claw 18a, therefore, can reliably guarantee the operating range of retainer 21a.In addition, in the oscillation bearing 30a that comprises such outer ring for rocking bearing 11a and retainer 21a, the possibility that retainer 21a comes off is little, and therefore, assembling performance is good.Such oscillation bearing 30a does not need to reset member, therefore, can consist of at an easy rate.

In addition, the assigned position of protuberance 18b leans on circumferential inboard than the recess 22a in circumferential outermost configuration, in the movement from the circumferential one distolateral outstanding position limitation retainer 21a of outer ring for rocking bearing 11a of the part of retainer 21a, therefore, in the rolling scope of the roller 20a that recess 22a keeps, can further reliably guarantee the operating range of retainer 21a.

In addition, the retainer 21a in the outstanding position from the outstanding overhang of outer ring for rocking bearing 11a below circumferential length dimension can be for the circumferential length dimension at the recess 22a of circumferential outermost configuration that arranges to the end 25a side in the side of retainer 21a from the end 25a of the side of retainer 21a.Specifically, the length dimension F of Figure 23 and Figure 24 is made as below the length dimension G.By such setting, can further reliably guarantee the operating range of retainer 21a.In addition, even when protuberance 18b and claw 18a butt, the roller 20a that keeps at the recess 22a of circumferential outermost configuration can not come off yet.Thereby the roller 20a that can prevent in the recess 22a of outermost configuration maintenance comes off.Such oscillation bearing 30a can make assembling performance better.

In addition, be provided with protuberance 18b assigned position can for from circumferential end 25a to than the recess 22a that arranges at outside diameter by the circumferential outside.By such setting, also can reliably guarantee the operating range of retainer 21a.

In addition, claw 18a and the protuberance 18b that engages with it can only be arranged at axial one distolateral.By such setting, also can limit the circumferential movement of retainer 21a.

At this, in the above-described embodiment, in the circumferential end of outer ring for rocking bearing claw is set, but is not limited to this, claw can be arranged at the position of the regulation of end close circumferential in the outer ring for rocking bearing.Figure 25, Figure 26, Figure 27 be in this case outer ring for rocking bearing and the figure of oscillation bearing, correspond respectively to Fig. 1, Figure 23, Figure 24.With reference to Figure 25～Figure 27 as can be known, the structure of outer ring for rocking bearing 11r is and the essentially identical structure of outer ring for rocking bearing 11a shown in Figure 1 that outer ring for rocking bearing 11r has: plane of trajectory orbital 12r; Lip part 13r, 13s; Jut 14r, 14s; Protuberance 15r, 15s and bending part 17r, 17s.Retainer 21r is centered by rotating center 33r, in upwards rotation of week.At this, claw 18r is arranged at the position near the regulation of circumferential end.In addition, claw 18r is arranged at the plane of trajectory orbital 12r side of lip part 13r, 13s.By such setting, also can reliably guarantee the operating range of retainer 21r.

The outer ring for rocking bearing of said structure is made by following manufacture method.As original material, using Kohlenstoffgehalt is the carbon steel of 0.5～1.1 % by weight.Specifically, consider that Kohlenstoffgehalt is SK 5 or SUJ2, the SAE 1070 (being JIS) etc. of 0.5～1.1 % by weight.

Figure 28 is the flow chart of the representative manufacturing process of expression outer ring for rocking bearing.With reference to Figure 28 as can be known, at first, the steel plate of stamping-out said original material (Figure 28 (A)).Secondly, utilize bending bent flanges section etc., form the outer shape (Figure 28 (B)) of outer ring for rocking bearing.This bending operation is undertaken by punch process.In this case, use the use material of above-mentioned Kohlenstoffgehalt, specifically, use Kohlenstoffgehalt less than the use material of 1.1 % by weight, therefore, processability is good, can precision forms well the outer shape of outer ring for rocking bearing.In addition, utilize punch process, carry out bending, therefore, can form at an easy rate the outer shape of outer ring for rocking bearing.

Secondly, heat-treat (Figure 28 (C)).At this, as heat treatment, implement bright quenching processing or high frequency hardening and process.In this case, use Kohlenstoffgehalt greater than the use material of 0.5 % by weight, therefore, utilize bright quenching to process or the high frequency hardening processing, can access as the required hardness of outer ring for rocking bearing, specifically the above hardness of Hv653.If as above carry out, then for example also can not implement carburizing and quenching and process.Thereby, can reduce the distortion of outer ring for rocking bearing, can precision keep well the outer shape of outer ring for rocking bearing.

At this, bright quenching is processed and is referred to by heat the Quenching Treatment of carrying out when preventing the oxidation on steel surface in shielding gas atmosphere or vacuum.If carry out such Quenching Treatment, then can make cost of equipment cheap.Thereby, can make at an easy rate.

It is the principle of utilizing induction overheated that high frequency hardening is processed, and heats rapidly the steel surface, and rapidly cooling, the method for making laser quenching hardened layer.By such Quenching Treatment, also can make cost of equipment cheap.Thereby, can make at an easy rate.In addition, in heat treatment step, do not use gas, therefore, have the advantage good to environment.And then, can also carry out partly Quenching Treatment.

And then, in order to reduce residual stress or the internal modification that produces by quenching, improve toughness or stabilization size, preferably after above-mentioned Quenching Treatment, carry out tempering.

In addition, after heat treatment, and then implement to grind the grinding process of (mill I), then, through cleaning etc., obtain final product.In addition, pack in the outer ring for rocking bearing that obtains so above-mentioned roller and retainer obtain oscillation bearing.

By formation like this, can utilize punch process, precision forms outer shape well.In addition, as heat treatment, bright quenching is processed or high frequency hardening is processed by implementing, and can access as the required hardness of outer ring for rocking bearing.If like that, the distortion in the time of then can reducing heat treatment.Thereby it is good and cheap to access precision, and has the outer ring for rocking bearing of high load capacity.And then the hardness of not only plane of trajectory orbital, and bending part also uprises, and therefore, the possibility of the breakage of bending part also reduces.Thereby, can prevent more reliably coming off of retainer and roller.

In addition, the outer ring for rocking bearing of said structure can be made by following manufacture method.As original material, using Kohlenstoffgehalt is the following carbon steels of above 1.1 % by weight of 0.15 % by weight.Specifically, consider that Kohlenstoffgehalt is that the following SCM 415 of above 0.5 % by weight of 0.15 % by weight or S50C (being JIS) etc. or Kohlenstoffgehalt are 0.5 % by weight is above, 1.1 % by weight are following SAE1070 or SK5 (being JIS) etc.

Referring again to Figure 28 as can be known, at first, the steel plate of stamping-out said original material (Figure 28 (A)).Secondly, utilize bending bent flanges section etc., form the profile (Figure 28 (B)) of outer ring for rocking bearing.Secondly, carry out above-mentioned heat treatment (Figure 28 (C)).And then, the grinding process of implementing to grind, then, process cleaning etc. obtain final product.

At this, implement nitrocarburizing in the heat treatment and process.Like this, process by the use material of 0.15 % by weight～1.1 % by weight is implemented nitrocarburizing, can make at an easy rate the outer ring for rocking bearing that has as the required hardness of outer ring for rocking bearing.That is, such outer ring for rocking bearing has high load capacity, and therefore, damaged possibility is little.In addition, the intensity of bending part also uprises, and therefore, can prevent more reliably coming off of retainer and roller.

In addition, can implement carburizing and quenching as heat treatment processes.It is the heat treatment method that utilizes the phenomenon of solid solution carbon in the steel of high temperature that carburizing and quenching is processed, and under can be in the Kohlenstoffgehalt of the steel inside low state, obtains the many surface layers (carburized hardening layer) of Kohlenstoffgehalt.Thus, obtain the surface firmly and the high character of soft inner toughness.In addition, if carry out such Quenching Treatment, then can make cost of equipment cheap.

And then, in order to reduce residual stress or the internal modification that produces by quenching, improve toughness or stabilization size, preferably after above-mentioned Quenching Treatment, carry out tempering.

In addition, at least one of outer ring for rocking bearing or roller can be for having nitrogen-enriched layer, and the granularity of austinite grain size numbering surpasses No. 10, and the remaining austenite amount is below the above 25 volume % of 11 volume %, and nitrogen content is the following structure of above 0.7 % by weight of 0.1 % by weight.By formation like this, can realize the long lifetime of oscillation bearing.

For at least one member in the outer ring for rocking bearing that consists of oscillation bearing and the roller, implement the from then on heat treatment of the low temperature secondary quenching method of explanation, can make thus the granularity numbering of the austenite crystal of the nitrogen-enriched layer of the member of at least one in outer ring for rocking bearing and the roller in the scope that surpasses No. 10, and the remaining austenite amount is more than the 11 volume % and below the 25 volume %, and nitrogen content is more than 0.1 % by weight and below 0.7 % by weight.

Secondly, the heat treatment of the nitrocarburizing processing that comprises that at least one bearing components to these outer ring for rocking bearing and roller carries out be described.In addition, below, as bearing components, will comprise that the rolling bearing of roller (outer ring), roller shaft (inner ring) and roller is put down in writing as embodiment.Figure 29 is that explanation is for the figure of an example of the heat treatment method of the two-stage of the bearing components that obtains said structure.In addition, Figure 30 is the figure of variation of the heat treatment method of explanation two-stage shown in Figure 29.Figure 29 is that the heat treatment mode of primary quenching and Qa method is carried out in expression, and Figure 30 is quenching midway material cooled to A ₁Below the transformation point temperature, then, again heating, the heat treatment mode of final method of quenching.Any all can access the bearing components of said structure.In these figure, processing T ₁In, make the fully diffusion in the blank of steel of carbon or nitrogen, carbon is dissolved in after, it is cooled to A ₁Below the transformation point.Secondly, processing T in the drawings ₂In, again be heated to than processing T ₁From then on low temperature comes into effect oil quench.In addition, below above-mentioned Figure 29 and heat treatment method shown in Figure 30 are referred to as two-stage heat treatment.

Above-mentioned heat treatment and normal quenching namely then directly carry out the situation of primary quenching after nitrocarburizing is processed compares, and in the time of can be with the surface part nitrocarburizing, the raising bursting strength reduces year in year out dimensional changes.The particle diameter that according to above-mentioned heat treatment method as can be known, can access austenite crystal is in the past 1/2nd microtissue.The rolling contact fatigue characteristic life-span that is subject to above-mentioned heat treated bearing components is long, can improve bursting strength, can also reduce year in year out size changing rate.

Figure 31 and Figure 32 are the microtissue figure of austenite grain especially of expression bearing components.Figure 31 is the bearing components of having implemented above-mentioned heat treatment method, and Figure 32 is bearing components in the past.That is, the austinite grain size that has been suitable for the Bearing Steel of above-mentioned heat treatment mode shown in Figure 30 is illustrated among Figure 31.In addition, for relatively, will be illustrated among Figure 32 based on the austinite grain size of the Bearing Steel of in the past heat treatment method.In addition, Figure 33 and Figure 34 are the figure that illustrates the austenite crystal border of above-mentioned Figure 31 and Figure 32.By these expression the organizing as can be known of austinite grain sizes, austenite particle diameter in the past is that the granularity by the JIS specification is numbered the numbering below No. 10, in addition, according to above-mentioned two-stage heat treatment method, can access No. 12 particulate.In addition, the result who measures the Mean particle diameter of Figure 31 with microtomy is 5.6 μ m.

Below, embodiment is described.Application standard heat treatment, nitrocarburizing are processed and these three kinds of heat treatment methods of two-stage heat treatment, make roller, roller shaft and roller.Standard heat treatment described herein, nitrocarburizing process and two-stage heat treatment represents following heat treatment method.

Standard heat treatment: in the RX gas atmosphere, after 840 ℃ of heating-up temperatures, the heating of 20 minutes retention times, quench, then, under 180 ℃, carry out tempering in 90 minutes.

Nitrocarburizing is processed: in the atmosphere of the mixed gas of RX gas and ammonia gas, after 850 ℃ of temperature, the heating of the condition of 150 minutes retention times, begin to quench from 850 ℃ of temperature, then, carry out tempering in 90 minutes under 180 ℃.

Two-stage heat treatment: carry out nitrocarburizing with 850 ℃ of nitrocarburizing treatment temperatures, the condition of 150 minutes retention times and process.In nitrocarburizing is processed, form the atmosphere of the mixed gas of RX gas and ammonia gas.Then, according to heat treatment mode shown in Figure 29, begin to carry out primary quenching from 850 ℃ of nitrocarburizing treatment temperatures, then, 800 ℃ of lower the heating 20 minutes of temperature lower than nitrocarburizing treatment temperature carry out secondary quenching, then, under 180 ℃, carry out tempering in 90 minutes.

Material about the member that obtains by these heat treatment methods is illustrated in the table 1.

[table 1]

Heat treatment method	Austinite grain size (JIS)	Remaining austenite amount (volume %)	Nitrogen content (% by weight)
				Standard heat treatment	9	7	0
Nitrocarburizing is processed	8	29	0.31
				Two-stage heat treatment	12	21	0.30

Then, the material investigation method is described.

Austinite grain size: the mensuration of austinite grain size is based on the austinite grain size test method of the steel of JIS G 0551 and carries out.

The remaining austenite amount: the mensuration of remaining austenite amount is by relatively carrying out based on the diffracted intensity of the martensite α (211) of X-ray diffraction and remaining austenite γ (220).As the remaining austenite amount, the value at the 50 μ m places, top layer of the rolling surface after the employing grinding.

Nitrogen content: the mensuration of nitrogen content is to carry out with EPMA.Nitrogen content adopts the value at the 50 μ m places, surface of the rolling surface after the grinding.

Secondly, the test result shown in the instruction card 1.

Austinite grain size: the crystal size numbering of two-stage heat-treated member is fine significantly to turn to 12.The crystal size of standard heat treatment member and nitrocarburizing heat-treated member is numbered 9 and 8, forms the austenite crystal thicker than the two-stage heat-treated member.

The remaining austenite amount: the remaining austenite amount of two-stage heat-treated member is 21 volume %, has the austenite of appropriateness.The remaining austenite amount of standard heat treatment member is 7 volume %, lacks than the two-stage heat-treated member.In addition, the remaining austenite amount of nitrocarburizing heat-treated member is 29 volume %, and is more than the two-stage heat-treated member.Hence one can see that, and the two-stage heat-treated member is the remaining austenite amount between standard heat treatment member and the nitrocarburizing heat-treated member.

Nitrogen content: the nitrogen content of two-stage heat-treated member is 0.30%.The standard heat treatment member does not carry out nitrocarburizing to be processed, and therefore, nitrogen content is 0%.In addition, the nitrogen content of nitrocarburizing heat-treated member is 0.31%.The nitrogen content of two-stage heat-treated member is compared with the nitrogen content of nitrocarburizing heat-treated member, is in lower slightly tendency.This is considered to: with regard to two-stage heat treatment, after nitrocarburizing is processed, carried out secondary quenching under 800 ℃ of temperature lower than nitrocarburizing treatment temperature.

Then, be used in combination roller, roller shaft and the roller that above-mentioned three kinds of heat treatment methods are made with various combinations, make rolling bearing, as test portion 1～test portion 11.Wherein, the sectional view of the structure (size) of expression test portion 1～test portion 6 shown in Figure 35, the sectional view of the structure (size) of expression test portion 7～test portion 11 shown in Figure 36.As shown in figure 35, to test portion 1～test portion 6, the width of roller 62 and roller 64 is made as 6.9mm, and the width of roller shaft 63 is made as 17.3mm.On the other hand, as shown in figure 36, to test portion 7～test portion 11, the width of roller 62 and roller 64 is made as 5.5mm, and the width of roller shaft 63 is made as 15.9mm.That is,, compare compactness about 20% to test portion 7～test portion 11 with test portion 1～test portion 6.

Secondly, test portion 1～test portion 11 is peeled off life test by following method.Figure 37 is the plan view of wanting section that life test apparatus 65 is peeled off in expression, and Figure 38 is the sectional view along the XXXVIII-XXXVIII line of Figure 37.Such as Figure 37 and shown in Figure 38, dispose rolling bearing 61, fixed idler whell axle 63 so that peel off the mode that the drive roller 66 of life test apparatus 65 contacts with roller 62.Then, apply under the state of radial load to rolling bearing 61 from the drive roller 66 of peeling off life test apparatus 65, drive roller 66 is rotated to the direction of arrow among Figure 37, make thus roller 62 rotations.Be determined at the time (life-span) till any is peeled off in roller 62, roller shaft 63 and the roller 64.In addition, 61 load that apply are made as 2.58kN from drive roller 66 to rolling bearing, and the rotating speed of roller 62 is made as 7000r/min.In addition, as the lubricant oil between roller 64, roller 62 and the roller shaft 63, use the engine oil of 10W-30, the temperature of lubricant oil is made as 100 ℃.

Peeling off the life-span of the combination of the member shown in table 2 and the table 3 in each test portion and each test portion.The two-stage heat-treated member is test portion 6, test portion 9, test portion 10 and test portion 11.In addition, the life-span of peeling off of each test portion represented as the ratio in 1 the situation with the life-span of peeling off with test portion 1.

[table 2]

[table 3]

As shown in Table 2, all members of pair roller 62, roller shaft 63 and roller 64 have carried out heat treated test portion 6 of two-stage to be compared with the test portion 1 that all members has been carried out standard heat treatment, has 3.5 times peel off the life-span.In addition, as shown in Table 3, in the situation of compactness bearing, pair roller 62 and roller shaft 63 carry out nitrocarburizing to be processed, and roller 64 has been carried out heat treated test portion 9 of two-stage compared with test portion 1, has 1.2 times peel off the life-span.In addition we know, pair roller 62 and roller 64 carry out nitrocarburizing to be processed, and pair roller axle 63 has carried out heat treated test portion 10 of two-stage to be compared with test portion 1, has 1.5 times peel off the life-span.And then pair roller 62 carries out nitrocarburizing to be processed, and roller 64 and roller shaft 63 has been carried out heat treated test portion 11 of two-stage compared with test portion 1, has 1.7 times peel off the life-span.From above result as can be known, roller 62, roller shaft 63 and roller 64 all have nitrogen-enriched layer, and the member of at least one of pair roller 62 and roller 64 carries out two-stage heat treatment, when can realize the compactness of bearing thus, suppress the reduction in life-span.

Thereby the oscillation bearing that possesses the outer ring for rocking bearing of the structure identical with such structure and roller can prolong to be peeled off the life-span.Thereby, can realize the long lifetime.

Secondly, to the explanation simple in structure of the air-pressure disc brake device that possesses above-mentioned oscillation bearing.Figure 39 is the general profile chart of part of the air-pressure disc brake device of expression one embodiment of the present invention.With reference to Figure 39 as can be known, air-pressure disc brake device 71 comprises: the break cylinder 79 that possesses actuator rod 72; The controller 73 that links with an end of actuator rod 72; The rotating member 74 that links with the other end of controller 73; Rotating member 74 is rotated the freely oscillation bearing 75 of supporting; Be arranged at from the joint 80 of the position of the rotating center off-centre of rotating member 74; The transfer part 76 that one end and joint 80 link; Brake pad 77a, the 77b of interlock in about transfer part 76; About brake pad 77a, 77b between the rotor 78 that disposes.

By the compressed-air actuated effect in the break cylinder 79, actuator rod 72 is pressed the direction of the arrow C of controller 73 in Figure 39.Carry out if so, then rotating member 74 rotation, the direction of the arrow D of the transfer part 76 that links with joint 80 in Figure 39 is pressed.If so, then interlock is in transfer part 76, about brake pad 77a, 77b sandwich rotor 78.In addition, if remove load from rotating member 74, then transfer part 76 is biased to the direction opposite with arrow D by the power of spring 81, returns original position.And brake off device pad 77a, 77b sandwich the state of rotor 78.Consist of like this air-pressure disc brake device 71.

At this, supporting rotating member 7 and the oscillation bearing 75 that can rotate have the structure shown in above-mentioned Fig. 5 etc.Such oscillation bearing 75 disposes the retainer that has kept roller at the internal side diameter of outer ring for rocking bearing, even after assembling, also utilizes bending part clamping retainer and keeps, and therefore, can prevent roller and retainer coming off from outer ring for rocking bearing.In addition, in when assembling, can prevent the separation of roller and retainer or depart from.Thereby, can make the assembling performance of oscillation bearing 75 good.

Such air-pressure disc brake device 71 comprises the good oscillation bearing of assembling performance 75, therefore, can boost productivity.

And then air-pressure disc brake device 71 can comprise the oscillation bearing of above-mentioned arbitrary structures.

In addition, in the above-described embodiment, with regard to outer ring for rocking bearing, it is crooked that the stamping-out steel plate makes it, and as final outer shape, but be not limited to this, also can make by cutting.

More than, with reference to the accompanying drawings of embodiments of the present invention, but the present invention is not limited to the structure of illustrated mode of execution.With respect to illustrated mode of execution, can be in the scope identical with the present invention, or in the scope that is equal to, apply various corrections or distortion.

Utilizability on the industry

Outer ring for rocking bearing of the present invention effectively utilizes situation about using in the oscillation bearing that requires good assembling performance.

Oscillation bearing of the present invention effectively utilizes in the situation that requires good assembling performance.

Air-pressure disc brake device of the present invention effectively utilizes in the situation of the raising that requires productivity.

Claims (13)

1. oscillation bearing, it possesses:

A plurality of rollers, it is disposed on the plane of trajectory orbital;

Retainer, it comprises the recess that keeps described roller and is positioned at the axial both end sides of described recess and a pair of linking department that upwards links to each other in week;

Outer ring for rocking bearing, it comprises plane of trajectory orbital at internal side diameter, and possess the lip part of axial two end part to the internal side diameter bending, wherein, described outer ring for rocking bearing is the shape that cylindrical structural member is cut off at circumferential any two places, is provided with bending part at the described lip part of at least one side, and described bending part is to axial described plane of trajectory orbital side bending, and clamping is configured in the retainer of internal side diameter

Assigned position at the axial end of described linking department is provided with protuberance,

Be provided with claw at described outer ring for rocking bearing, described claw described retainer with respect to described outer ring for rocking bearing when week upwards having moved established amount and described protuberance butt, limit the amount of movement of described retainer,

The assigned position of described protuberance than at the described recess of circumferential outermost configuration by circumferential inboard, in the part of described retainer circumferential one distolateral outstanding position from described outer ring for rocking bearing, limit the movement of described retainer,

Described retainer in the described outstanding position from the circumferential length dimension of the outstanding overhang of described outer ring for rocking bearing be from the end of a side of described retainer to the tip side in a side of described retainer arrange below the circumferential length dimension of the described recess that circumferential outermost disposes.

2. oscillation bearing according to claim 1, wherein,

Be provided with the engagement portion that engages with described bending part at described linking department.

3. oscillation bearing according to claim 1, wherein,

At least one of described outer ring for rocking bearing or described roller has nitrogen-enriched layer, and the granularity of austinite grain size numbering is above No. 10, and the remaining austenite amount is below the above 25 volume % of 11 volume %, and nitrogen content is below above 0.7 % by weight of 0.1 % by weight.

4. oscillation bearing according to claim 1, wherein,

Described claw and described protuberance are arranged at axial two end part.

5. oscillation bearing according to claim 1, wherein,

According to the mode that described retainer has been kept by this bending part after having passed through described bending part, the chimeric admissible set of the chimeric buckle of buckle section is allowed at least any setting in described retainer and described bending part.

6. oscillation bearing according to claim 5, wherein,

The chimeric admissible set of described buckle section comprises the chimeric pawl of giving prominence to vertically from the end face of described linking department.

7. oscillation bearing according to claim 6, wherein,

Bight at the outside diameter of described chimeric pawl is provided with chamfering.

8. oscillation bearing according to claim 6, wherein,

Bight at the internal side diameter of described bending part is provided with chamfering.

9. oscillation bearing according to claim 6, wherein,

Described chimeric pawl is arranged at the circumferential position that possesses described recess.

10. oscillation bearing according to claim 6, wherein,

Described chimeric pawl is arranged at the linking department of both sides,

The circumferential position of the chimeric pawl that arranges at the linking department of a side is different with the circumferential position at the chimeric pawl of the linking department setting of opposite side.

11. oscillation bearing according to claim 5, wherein,

The chimeric admissible set of described buckle section comprises and is arranged at described linking department and is the slit of radially recessed shape.

12. oscillation bearing according to claim 11, wherein,

The axial length dimension of described slit is made as W ₁, the axial length dimension of described linking department is made as W ₂Situation under, have 0.2W ₂＜W ₁＜0.8W ₂Relation,

The length dimension radially of described slit is made as H ₁, the length dimension radially of described linking department is made as H ₂Situation under, have 0.2H ₂＜H ₁＜0.8H ₂Relation.

13. an air-pressure disc brake device, it possesses oscillation bearing claimed in claim 1.

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