CN100359199C - Floating caliper disc brake - Google Patents

Abstract

An object of the present invention is to provide a floating caliper type disc brake which can effectively suppress the occurrence of uneven wear in linings of respective pads, and effectively suppress the occurrence of noise and judder during braking. In the present invention, a caliper is supported by a support member displaceably in an axial direction of a rotor. Pressed-side shim plates are respectively lined on reverse surfaces of back plates of pads supported by the support, while supporting-side shim plates are lined on an inner side surface of a claw portion and on a distal end face of a piston. The pressed-side shim plates and the pressing-side shim plates are respectively retained by mating members to be lined on by means of resilient retainers, and one surface of each of the mutually opposing pressed-side shim plates and one surface of each of the pressing-side shim plates are slidably abutted against each other.

Description

Floating caliper disc brake

Technical field

Floating caliper disc brake according to the present invention is used for automobile is braked.The present invention is used for preventing merging to the uneven wear of liner of such disk type braker and rotor its uneven wear radially relatively.

Background technique

As disclosed among the patent document 1-3, as the disk type braker that is used for braking automobile, wherein clamp are widely known by the people by the floating caliper type that supporting element supports movably traditionally by a pair of guide finge, and in fact also are widely used.Figure 21,22 has shown in such floating caliper disc brake disclosed disk type braker in patent documentation 1.In this floating caliper disc brake, when braking, clamp 2 move relative to rotor 1, and described rotor 1 rotates with the wheel (not shown).Disk type braker is assembled in the state of vehicle therein, is fixed to the vehicle body (not shown) with the supporting element 3 adjacent to the state setting of a side of this rotor 1 by mounting hole 4.In addition, clamp 2 rotor 1 axially in support by this supporting element 3 movably.

For this reason, from the sense of rotation of rotor 1, a pair of guide finge 5 is separately positioned in the two end portions of clamp 2, and simultaneously a pair of bullport 6 similarly is arranged in two ends of supporting element 3 of support.Described a pair of guide finge 5 and described a pair of bullport 6 are set up the central axis that is parallel to rotor 1.Guide finge 5 is inserted bullport 6 slidably in axial direction.Dust-proof cover 7 is set between the open part of the outer surface of close end of each guide finge 5 and each bullport 6.Should be noted that in some cases the internal diameter of bullport 6 is different mutually, and the external diameter of guide finge is also correspondingly different mutually in some cases.

In addition, be separately positioned in two ends of supporting element 3 on the position that inboard and anastomosis part, the outside 8,9 separates in rotor 1 circumferential.The far-end of these anastomosis parts 8,9 is with the U-shaped bending, the vertical like this outer peripheral portion that strides across the rotor 1 among Figure 21.Two ends and these two anastomosis parts 8,9 of forming a pair of dunnage 11 of liner 10a and 10b engage on rotor 1 axial slidably.Clamp 2 are provided with column part 12 and claw 13, and described column part 12 is connected by the bridge part that strides across liner 10a, 10b with claw 13.The piston 14 that is used for relative rotor 1 extruding inner liner 10a is by the close column part 12 that is fixed to these clamp 2 of liquid.

In the process of implementing braking, pressure oil is fed in the column part 12, so that the inner surface of rotor 1 is upwards pushed in the bottom of lining 15 from Figure 21 of inner liner 10a by piston 14.Then, because the reaction of this extruding force, clamp 2 move down based on the relative bullport 6 of sliding movement of guide finge 5.As a result, the lining 15 (the horizontal outside of vehicle, i.e. upside among Figure 21) of the outer liner 10b of the outer surface of claw 13 relative rotors 1 extruding.As a result, this rotor 1 blocks securely from medial and lateral, implements braking thus.

In addition, although not shown among Figure 21,22, wherein backing plate only is clamped between the distal surface of the reflecting surface of dunnage 11 of inner liner 10a and piston 14 or the structure on the side between the inner surface of the reflecting surface of the dunnage 11 of outer liner 10b and claw 13 being widely known by the people by the open of patent documentation 2,5 and 7-10.In addition, wherein the structure that is clamped in respectively between the aforesaid matching surface of backing plate being widely known by the people by the open of patent documentation 3,4 and 6.Use disclosed structure in these patent documentations, by between the match surface on described surface (between the perhaps a pair of surface), providing backing plate, might reduce brake noise and the vibration that produced in the process of brake, and reduce to be transferred to the degree of clamp 3 from the moment of torsion that rotor 2 is transferred to liner 10a, 10b.

Should be noted that as prior art file related to the present invention except patent document 1-10, patent document 11 and 12 also is known.

[patent document 1] JP-A-55-123029

[patent document 2] JP-A-11-044331

[patent document 3] JP-Y-2596090

[patent document 4] JP-A-59-019730

[patent document 5] JP-A-08-093808

[patent document 6] JP-A-10-308301

[patent document 7] JP-U-57-149331

[patent document 8] JP-U-02-124330

[patent document 9] JP-U-03-124031

[patent document 10] JP-U-05-042779

[patent document 11] JP-U-62-069635

[patent document 12] JP-A-55-014381

Under the situation of the floating caliper disc brake of conventional known, shown in Figure 21,22, and according to constructing as mentioned above and operating, the so-called non-uniform friction situation can appear, and wherein the wear extent of the lining 15 of liner 10a, 10b becomes inhomogeneous.The appearance of these uneven wearing and tearing has constituted reason of brake noise and vibration in the braking process.Carry out with reference to Figure 23 for detailed description in this respect.Although should be noted that the structure of part there are differences in detail between the structure shown in the structure shown in Figure 21,22 and Figure 23, basic structure is identical.

Rotate on the indicated direction of the arrow A of rotor 1 in Figure 23 therein, if two side surfaces of the lining of liner 10a, 10b 15 these rotors 1 of extruding are to implement braking, because be applied to the effect of the braking force on this rotor 1, braking force F1 acts on each lining 15.In addition, power F2 and the F3 that acts on the direction identical with braking force F1 is applied to the inner surface (lower surface Figure 23) of the claw 13 of clamp 2 and the distal surface (upper end face among Figure 23) of piston 14 from the dunnage 11 of liner 10a, 10b respectively.In the case, the anastomosis part o that is tending towards between the guide finge 5 on the inboard (left-hand side among Figure 23) of bullport 6 and rotor 1 of clamp 2 turns clockwise in the drawings in some cases.In addition, in some cases, based on power F2 and F3, the momentum M1 and the M2 that center on anastomosis part o act on respectively on claw 13 and the piston 14.In addition, the length L 1 between the contact segment between the dunnage 11 of the inner surface of anastomosis part o and this claw 13 and outer liner 10b is greater than (the L1＞L2) of the length L 2 between the contact segment between the dunnage 11 of the distal surface of this anastomosis part o and piston 14 and inner liner 10a.For this reason,, act on momentum M1 on the claw 13 greater than acting on momentum M2 on the piston 14 (M1＞M2) for momentum M1 and M2.

Simultaneously, with reference to above-mentioned, under the situation of the conventional construction shown in Figure 21 and 22, the inner surface of claw 13 and the distal surface of piston directly contact with the dunnage 11 of each liner 10a, 10b.For this reason, the frictional force that acts between each of distal surface of the inner surface of each these dunnage 11 and claw 13 and piston 14 becomes bigger.Therefore, momentum M1 and M2 become bigger, and clamp 2 are the in-planes of rotors 1 roughly tilt (may carry out main body) relatively.Under the situation that clamp 2 tilt in this way, the sense of rotation A of the relative rotor 1 of wear extent of the lining 15 of liner 10a, 10b becomes inhomogeneous.Especially, as for outer liner 10b, the wearing and tearing on the outside of rotor 1 (right-hand side among Figure 23) are compared rising (it is bigger that wear extent becomes) with the wearing and tearing on the inboard of rotor 1.On the other hand, as for inner liner 10a, growth is compared in the wearing and tearing on the outside of the wearing and tearing on the inboard of rotor 1 and rotor 1.As a result, uneven wearing and tearing take place in the lining of liner 10a and 10b.

On the contrary, in patent document 2,5 and 7-10 under the situation of disclosed structure, backing plate only is clamped between the distal surface of the reflecting surface of dunnage 11 of inner liner 10a and piston 14 or on the side between the inner surface of the reflecting surface of the dunnage 11 of outer liner 10b and claw 13.For this reason, the frictional force that acts on one of two pairs of surfaces may diminish, and therefore the power F2 (perhaps outer surface) that is applied on claw 13 or the piston 14 may diminish, and one of momentum M1 and M2 may diminish.But in patent document 2,5 and 7-10 under the situation of disclosed structure, backing plate is not to be clamped between the inner surface of the reflecting surface of dunnage 11 of outer liner 10b and claw 13.For this reason, for momentum M1 and M2, it is bigger that other momentum still keeps, and the inclination of clamp 2 is can repressed effect lower in the process of braking thus.

On the contrary, in patent document 3,4 and 6 under the situation of disclosed structure, backing plate is clamped between the distal surface of the reflecting surface of dunnage 11 of inner liner 10a and piston 14 respectively and on two sides between the inner surface of the reflecting surface of the dunnage 11 of outer liner 10b and claw 13.But, in patent document 3,4 and 6, under the situation of disclosed structure, can run into following shortcoming of the present invention respectively.At first, under the situation of patent document 3 disclosed structures, liner is respectively installed on the side of dunnage 11 of two inside and outside liner 10a, 10b, and the relative displacement of these dunnages becomes possibility in the sense of rotation of rotor 1 relatively with in the prespecified range of each dunnage 11 radially.But the side surface of each of these backing plates on the side of claw 13 or piston 14 distal surface of the inner surface of claw 13 or piston 14 therewith is directly relative.In addition, under the situation of patent document 4 disclosed structures, be separately positioned on by the formed thin plate of fixing vibration isolating part between two backing plates between each and one of the inner surface of claw 13 and the distal surface of piston 14 on direction surface of dunnage 11 of two inside and outside liner 10a, 10b.Under the situation of patent document 3,4 disclosed structures, the momentum M1 and the M2 that act on claw 13 and the piston 14 can not become fully little, make the inclination that suppresses clamp 2 in the process of braking become possible effect and become less.

Under the situation of patent document 6 disclosed structures, interior backing plate and outer backing plate are separately positioned between each and one of the inner surface of claw 13 and distal surface of piston 14 of reflecting surface of dunnage 11 of inside and outside liner 10a, 10b.For these backing plates, be fixed to dunnage 11 in the interior backing plate state that the displacement of the sense of rotation of rotor 1 and these backing plates of making progress of footpath is prevented from therein.In addition, each outer backing plate keeps by each dunnage 11, and its mode can cover adjacent interior backing plate, each of these outer backing plates relatively in each the relative displacement of backing plate make and become possibility in the scope of being scheduled in the sense of rotation of rotor 1.For this reason,, in the process of braking, just may suppress the inclination of clamp 2 if the frictional force that acts between each interior backing plate and each the outer backing plate diminishes.But, wherein each outer backing plate relatively in each backing plate movably scope be restricted, so just can not obtain in the process of braking, to prevent the effect of clamp 2 inclinations effectively.

Simultaneously, with reference to above-mentioned under the situation of the conventional construction shown in Figure 21,22, the problem of the uneven wear in occurring in above-mentioned liner 10a, 10b, the problem that also has is that the wear extent of rotor 1 becomes inhomogeneous diametrically, promptly so-called generation uneven wear.The reason that so uneven wearing and tearing upwards take place in the footpath of rotor 1 is conceived to as follows: promptly, in passing through the braking process of disk type braker, rotor 1 is owing to the result of the friction of the lining 15 of each liner 10a, 10b causes temperature to raise.In the process that this temperature raises, after the process neutralization of high-temperature brake follows braking closely, because the effect that it is arranged on the mounting portion on the internal side diameter that is used for wheel and is arranged on the axial dipole field of its sliding parts on the outer radial side that is used for liner 10a, 10b, be arranged near sliding parts (particularly outside) distortion diametrically of the rotor 1 the periphery, shown in the chain line in 24.In addition, the part of the rotor 1 that clamps by a pair of liner 10a, 10b in the process of braking of evidence relatively and the shade plane inclination that is occurred in the direction of rotating center quadrature.

When the sliding parts of rotor 1 tilts like this, the lining of liner 10a, 10b in the process of braking part in abutting connection with two side surfaces of this rotor 1.That is, under the situation of traditional common floating caliper disc brake, described a pair of guide finge 5 and these pin 5 described a pair of bullports that are fixed 6 just axially are engaged with each other movablely.Therefore, the distal surface of the inner surface of the claw 13 of the reflecting surface of the dunnage 11 of compressed against gasket 10a, 10b and piston keeps and the rotating center of rotor 1 mutually on the direction of quadrature.For this reason, lining 15 partly abuts against on the side surface of rotor 1 in the above described manner, like this rotor 1 uneven wear in the idle process of high-temperature brake or high temperature.Especially, under the situation in the outside of this rotor 1, for example, the wearing and tearing of comparing on the radially outward side with the wearing and tearing on the inboard increase (wear extent increase).On the other hand, under the situation of the inboard of this rotor 1, for example, compare with the wearing and tearing on the outside, the wearing and tearing of radially going up to the inside increase.Middle in any direction uneven wear increases, not only the state of each side surface of this rotor 1 and the sliding contact between each lining 15 become rotor therein do not have in the state of distortion improper, rotor 1 and comprise that the liner 10a of lining 15, the life-span of 10b reduce unfriendly.

As disclosed in the patent document 2, in this example, wherein the part of guide finge is inserted in the bullport by hover ground.But, using this structure, the distal portions that relative small diameter portion has the stub of less clearance is out of shape in the process of braking, and causes cylinder block to comply with the circumferential displacement of rotor.For this reason, be appreciated that the slip resistance that diminishes based on the distal portions of stub becomes big.

Floating caliper disc brake according to the present invention is designed to overcome above-mentioned defective.

Summary of the invention

According to the present invention, a kind of floating caliper disc brake is provided, comprising: supporting element, described supporting element are fixed to vehicle body and adjacent to taking turns the rotor rotated setting; A pair of liner, it axially supports described a pair of liner slidably in the upper edge, two sides of rotor by supporting element; Clamp, described clamp rotor axially on supported movably, clamp support by a plurality of guide finge that are arranged on a plurality of bullports in the supporting element and be separately fixed in the bullport; Claw, described claw are set on the side of bridge part of clamp, and bridge part strides across rotor; And piston, described piston is arranged on the other side, wherein because the described a pair of liner of the result of the extension of piston pushes two side surfaces of rotor to implement braking, be extruded the side backing plate and kept by these surfaces of the dunnage of the described a pair of liner by leaving rotor-side respectively, the squeeze side backing plate keeps by the squeeze side of claw and piston respectively; And each to be extruded side backing plate and each squeeze side backing plate adjacent slidably each other.

Description of drawings

Fig. 1 is the fragmentary cross-sectional view of getting from according to the outside diameter of the floating caliper disc brake of first reference example of reference example of the present invention;

Fig. 2 is the half side view of three examples of the shape of guide finge;

Fig. 3 be the line A-A from Fig. 1 get, wherein clamp swing with the distortion of rotor and the state of displacement in schematic representation;

Fig. 4 is a view similar to Fig. 1, that second reference example of reference example of the present invention is described;

Fig. 5 is the view of the A-A cross section in the explanation first embodiment of the present invention and the corresponding diagram 1;

Fig. 6 is the decomposition view of the part B among Fig. 5;

Fig. 7 is the decomposition view of the portion C among Fig. 5;

Fig. 8 is used for explaining in first embodiment when guide finge and bullport an axial displacement and the viewgraph of cross-section of the effect that obtained when being engaged with each other each other;

Fig. 9 is the enlarged cross-sectional view of the part D in the corresponding diagram 8, is used to explain the other effect that is obtained according to first embodiment;

Figure 10 wherein is used for confirming the effect that the present invention obtains and the result of the test of carrying out supplies to the view of the relation between the angle of inclination of central axis of the oil pressure (brake fluid oil) of the pressure oil in the cylinder and clamp by the process in braking;

Figure 11 is piston, inner liner and interior extruding that is used to constitute the second embodiment of the present invention and the perspective exploded view that is extruded the side backing plate;

Figure 12 also is claw, outer liner and the perspective exploded view that pushes and be extruded the side backing plate outward;

Figure 13 is the view of explanation according to mated condition between second embodiment's claw and the outer squeeze side backing plate;

Figure 14 is the view of the third embodiment of the present invention, and similar to Fig. 12.

Figure 15 has illustrated the fourth embodiment of the present invention, and similar to Figure 12.

Figure 16 is the view similar to Figure 13, and the other shape of the maintenance projection that is formed on the squeeze side backing plate has been described;

Figure 17 is the view that the fifth embodiment of the present invention has been described, and similar to Figure 11;

Figure 18 is the view that the sixth embodiment of the present invention has been described, and similar to Figure 11;

Figure 19 is the roughly viewgraph of cross-section of the seventh embodiment of the present invention, and wherein part is omitted;

Figure 20 is the viewgraph of cross-section corresponding to the amplification of the part E among Figure 19, and has illustrated that claw wherein is extruded the state that side backing plate and outer liner are swung and moved relative to outside;

Figure 21 has illustrated that first example of wherein traditional structure is from the fragmentary cross-sectional view shown in the identical direction of Fig. 1;

Figure 22 is the viewgraph of cross-section that the line F-F in Figure 21 is got;

Figure 23 is used for explaining that process in braking acts on the viewgraph of cross-section of the momentum on the piston of claw and clamp;

Figure 24 is the part viewgraph of cross-section that the state that its rotor is deformed is described owing to the cause of the rising of the temperature of following braking.

In the drawings, reference character 1 is a rotor, 2,2a is clamp, 3,3a is a supporting element, the 4th, mounting hole, 5,5a, 5b, 5c, 5d, 5e and 5a ' they are guide finge, 6,6a, 6a ' is a bullport, 7,7a and 7a ' are covers, 8,8a is inboard anastomosis part, 9,9a is anastomosis part, the outside, 10,10a is a liner, the 11st, dunnage, the 12nd, cylinder portion, 13,13a is a claw, the 14th, piston, the 15th, lining, the 16th, arm, the 17th, through hole, the 18th, bolt, the 19th, with threaded hole, 20a, 20b, 20c, 20d and 20a ' they are the major diameter parts, the 21st, and the inclined surface part, the 22nd, the periphery part, 23a, 23b, 23a ' and 23b ' they are rings, the 24th, keep step portion, and the 25th, sleeve, 26a, 26b is extruded the side backing plate, 27a, 27b is the squeeze side backing plate, 28a, 28b, 28a ' and 28b ' they are small diameter portion, the 29th, extend small diameter portion, the 30th, retainer, the 35th, depression, the 38th, bending part, the 39th, internal side diameter curved section, the 40th, the outside diameter curved section, the 41st, keep projection, the 42nd, retaining hole, 43,43a keeps projection, the 44th, keep projection, the 45th, keep projection.

Embodiment

In the embodiment of this invention, preferably as described in the claim 2,10, in according to claim 1 or 9 described floating caliper disc brakes, each of a plurality of guide finge rotor axially on have first diameter parts on its each opposed end, the described first diameter parts relatively wherein bullport that is fixed of guide finge has the gap of preliminary dimension or bigger, and guide finge at least one along rotor axially therebetween the part on have second diameter parts, the diameter of described second diameter parts is greater than the diameter of first diameter parts.

In this preferred construction, a plurality of be used for clamp support to pin on the supporting element on its axial opposed end relatively bullport have preliminary dimension or bigger gap, and around being arranged on the outer peripheral portion that is formed on second diameter parts in one of guide finge at least and wherein each anastomosis part swing between the interior perimeter surface of the bullport that is inserted into of guide finge.For this reason, even under the situation that rotor is out of shape in the axial direction owing to the cause of the temperature rising of following braking to take place, the inner surface of claw and the distal surface of piston can be parallel to two side surfaces of this rotor.As a result, the lining of described a pair of liner pushes two side surfaces of rotor equably in the zone of the scope from the inner periphery to the outer periphery.Like this, just can prevent that its rotor is owing to the cause of its displacement of himself in the direction that tilts becomes the situation that part is worn and torn, i.e. the wear extent radial offset of rotor.In addition, according to this preferred construction, the momentum that acts on as a whole on these clamp based on being applied to the power on the clamp can become littler in the process of braking, and can suppress the in-plane of the relative rotor of these clamp effectively and tilt.As a result, can suppress the generation of the uneven wear in the lining of liner more effectively, and more effectively suppress brake noise and vibration in the process of braking.

[first reference example]

Fig. 1-3 has shown first reference example of the present invention.The floating caliper disc brake of this reference example has supporting element 3a, a pair of liner 10a and 10b, clamp 2a, claw 13a and piston 14 (referring to Figure 21,22).For these parts, supporting element 3a is fixed to vehicle body, and its mode makes it possible to be provided with adjacent to rotor 1, and rotor 1 rotates with wheel.In addition, liner 10a, 10b are separately positioned on the both sides of rotor 1 in the state that liner 10a, 10b are supported by supporting element 3a.It should be noted that be used for by vehicle body support the part of this supporting element 3a structure and effect, be used for the part by supporting element 3a support pad 10a, 10b and be used for the part of two side surfaces by claw 13a and piston 14 extruding rotors 1 and these structural similarities of known disk type braker traditionally, described known traditionally disk type braker comprises with reference to the structure shown in Figure 21,22 as above.Therefore, will omit its detailed description and description.

Clamp 2a by rotor 1 axially on (on the Vertical direction among Fig. 1) movably supporting element 3a support.For this reason, from the circumferential direction of rotor 1, observe, only the bullport 6a that opens wide on the inboard and 6a ' by respectively the rotor 1 within inboard anastomosis part 8a and anastomosis part, the outside 9a axially on form, described inboard anastomosis part 8a and anastomosis part, outside 9a are set in two ends of supporting element 3a.In addition, the proximal end of guide finge 5a, 5a ' is supported and is fixing by the distal portion branch by a pair of arm 16 on a pair of part (inner end) that is formed on clamp 2a respectively, and described distal portions is in the state of projection in the circumferential direction of this rotor 1.Promptly, carry out threaded joint with a pair of with threaded hole 19 and be fastened in described a pair of with threaded hole 19 as the pair of bolts in a pair of through hole 17 that is inserted into from the inboard the distal portions that is formed on arm 16 18, described a pair of with threaded hole 19 open wide in the proximal end face of guide finge 5a, 5a ', and the proximal part of guide finge 5a, 5a ' passes through the distal portions support of arm 16 and fixes.Although it should be noted that the internal diameter of the bullport 6a, the 6b that are provided with in pairs respectively and the external diameter (external diameter of major diameter part 20a, 20a ' of guide finge 5a, 5a ', this will illustrate below, and appear at part on the axial opposite flank of major diameter part 20a, 20a ') be shown and be equal to, these diameters do not need to be equal under the situation as above-mentioned traditional structure.

Under the situation of this example, when such guide finge 5a and 5a ' when interior side opening is inserted into bullport 6a, the 6a ', clamp 2a by rotor 1 axially on (Vertical direction among Fig. 1) movably supporting element 3a support.Guide finge 5a, 5a ' have the solid body of being made by metal, and its external diameter is greater than in the major diameter part 20a of two ends of these guide finge 5a, 5a ', the axial intermediate portion that 20a ' is respectively formed at guide finge 5a, 5a '.The outer surface of these major diameter parts 20a, 20a ' and the interior perimeter surface of bullport 6a, 6a ' axially are engaged with each other slidably.

For guide finge 5a, 5a ', the outside diameter d 2 of major diameter part 20a, 20a ' is slightly less than (for example little 0.2mm or littler, be preferably 0.15mm or about) bullport 6a, 6a ' (D＞d2＞D-0.2mm, d2=D-0.15mm preferably) inside diameter D is (in the vehicle of common size, perhaps littler, preferably 10mm or about).Like this, these major diameter parts 20a, 20a ' are with footpath less clearance and axially movably being fixed among bullport 6a and the 6a ' upwards.Comparatively speaking, the outside diameter d 1 of the small diameter portion 28a of the remainder of guide finge 5a, 5a ', 28b, 28a ' and 28b ' is from major diameter part 20a, 20a ' axial dipole field, and fully (for example, 0.5mm it is or bigger, be preferably 0.62mm or about) less than the inside diameter D (d1≤D-0.5mm, preferably d1=D-0.62mm) of bullport 6a, 6a '.Like this, Xiang Guan part upwards can swing a little in the footpath of the inside of bullport 6a, 6a ' and can move.The outside diameter d 1 that it should be noted that small diameter portion 28a, 28b, 28a ' and 28b ' is according to the deformability of the relative size of shake unit and rotor 1 and slightly different.

In addition, as the guide finge 5a, the 5a ' that have major diameter part 20a, 20a ' respectively in axial intermediate portion, Fig. 1 and 2 A has shown that wherein the shape of the bus of this major diameter part 20 (generating line) is trapezoidal situation.In such major diameter part 20, the axial length L of the cylinder surface part 22 the inclined surface part 21 on two ends ₂₂Be set to 10-20mm or about, this is than the length L of the part that is inserted into each guide finge 5a, 5a ' among each bullport 6a, 6a ' _5a(for example, 50-80mm or about) suitable weak point (for example, greater than 1/4 or still less) (L ₂₂＜＜L _5a).In addition, guide finge 5a and 5a ' can swing and move owing to the very little gap between the interior perimeter surface that appears at cylinder surface part 22 and each bullport 6a, 6a '.

In addition, at two axial positions, promptly be fixed on guide finge 5a, the 5a ' at distal portions and proximal part, each bigger diameter parts 20a, 20a is therebetween on described two positions by the elastic ring 23a of manufacturings such as rubber and 23b, 23a ' and 23b '.For these ring 23a and 23b, 23a ' and 23b ', the ring 23a and the 23a ' that are separately fixed on the distal portions of guide finge 5a, 5a ' are formed hollow cylindrical, and minor diameter fixing respectively and that be supported on the distal portions that is formed on these guide finge 5a, 5a ' keeps on the step part 24.On the other hand, be fixed on ring 23b and the 23b ' on the proximal part of these guide finge 5a, 5a ' and to be separately positioned on outer surface and dustproof hood 7a, the 7a ' between the opening among bullport 6a, the 6a ' of proximal part of these guide finge 5a, 5a ' integrally formed.Each encircles 23a, 23b, and 23a ' and 23b ' are arranged between the interior perimeter surface of the outer surface of each guide finge 5a, 5a ' and each bullport 6a, 6a ' with the compressed state of radial elastic.

For the floating caliper disc brake in this reference example of as above structure, the relative supporting element 3a of clamp 2a can swing around the anastomosis part between the interior perimeter surface of the outer surface of major diameter part 20a, the 20a ' of guide finge 5a, 5a ' and bullport 6a, 6a '.For this reason, even under the situation of the axial deformation that rotor 1 is caused owing to the temperature of following braking raises, chain line is shown among Figure 24 as above, and the distal surface of the inner surface of claw 13a and piston 14 can be parallel to two side surfaces of rotor 1.Promptly, because the reflecting surface of the dunnage 11 of the inner surface of claw 13a and distal surface dummy block 10a, the 10b of piston 14, be compressed at the lining 15 of liner 10a, 10b under the state on two side surfaces of rotor 1, the power distal surface of the inner surface of claw 13a and piston 14 therein is set up on the direction of two side surfaces that are parallel to rotor 1 and acts on the clamp 2a.

Based on these power, clamp 2a is with the relative supporting element 3a swing of above-mentioned mode.On this node, ring 23a, 23b, 23a ' and 23b ' radial elastic compression between the interior perimeter surface of the outer surface of guide finge 5a, 5a ' and bullport 6a, 6a '.For this reason, the distal surface of the inner surface of claw 13a and piston 14 is parallel to two side surfaces of rotor 1.The lining 15 of liner 10a, 10b pushes two side surfaces of this rotor 1 substantially in the zone of the scope their outer periphery equably respectively at the inner periphery from them.As a result, just may prevent that rotor 1 is relatively radially because the part that inclination the caused wearing and tearing of rotor 1 self.

Provide explanation in this respect below with reference to Fig. 3.Its rotor 1 toward the outer side (left-hand side among Fig. 3) along with the temperature that taken place in process of braking raises with angle θ ₁Tilt.Simultaneously in the case, be arranged on by body side and support and be fixed to the rotating center that guide finge 6a among the supporting element 3a of described body side remains parallel to rotor 1.On the other hand, be provided with claw 13a and push the piston 14 of described a pair of liner 10a, 10b with two side surfaces that are used for relative this rotor 1 owing to follow the cause of the power of these extruding forces to go up swing in the direction (Fig. 3 is counterclockwise) of the inclination of complying with rotor.This oscillating motion is with angle θ ₂A part be possible, up to the interior perimeter surface of the distal portion of guide finge 5a or close end adjacent inner side surface 6a, compress the circumferential part of described a pair of ring 23a, 23b simultaneously around the major diameter part 20a of the part of guide finge 5a.But this pendulum angle θ ₂Can regulate from the outer dia of the remainder of the guide finge 5a of major diameter part 20a axial dipole field by change.Correspondingly, if from the tilt angle theta of outer dia with the rotor of determining by test 1 of the described part of major diameter part 20a axial dipole field ₂With respect to and regulate, the lining 11 of liner 10a, 10b relatively two side surfaces of this rotor 1 by causing claw 13a inner surface and the distal surface of piston comply with the inclination of rotor 1 and evenly extruding.

Like this, under the situation of the floating caliper disc brake of this reference example, by the shape of design guide finge 5a, 5a ', clamp 2a supports by swinging a little with movable supporting element 3a.Guide finge 5a, 5a ' have complete in the solid body of making such as stainless harder metal, and have full intensity and rigidity.Correspondingly, just may pass through the supporting element 3a support strength of fixed caliper 2a fully by guide finge 5a, 5a '.In addition, major diameter part 20a, the 20a ' of guide finge 5a, 5a ' relatively radially are fixed among bullport 6a, the 6a '.In addition, ring 23a, 23b, 23a ' and 23b ' are arranged on the position of clamping major diameter part 20a, 20a ' under the state of elastic compression diametrically from axial both sides.Correspondingly, clamp 2a is relative, and supporting element 3a becomes stable, and this just may reduce thump thump the sound that taken place in the process of non-braking.

It should be noted that as the shape of the major diameter part of the guide finge of the floating caliper disc brake that is used to allow to be provided with above-mentioned functions, except above-mentioned, can also adopt shown shape among Fig. 2 (b) and 2 (c).For these guide finge, shown guide finge 5b is formed among Fig. 2 (b), the major diameter part 20b that is formed on the hollow circuit cylinder surface configuration in the axial intermediate portion like this from two side by a pair of curved surface clamping, each bus of described curved surface is the protruding circular arc with bigger radius of curvature, and the part that is inserted into like this in the bullport forms the barrel of beer shape.Simultaneously, guide finge 5c as shown in Fig. 2 (c) is formed, be fixed on the axial intermediate portion by metal or the formed hollow circuit cylinder sleeve 25 of hard synthetic resin like this and be fixed to described axial intermediate portion, the outer surface of this sleeve 25 is used as major diameter part 20c and forms.In addition, although not shown, the shape of bus is that the part of rectangle can be omitted from the shape shown in Fig. 2 (b), and the shape that whole major diameter part can form bus is the curved surface of crooked circular arc.

[second reference example]

Then, Fig. 4 has shown second reference example of the present invention, and under the situation of this reference example, major diameter part 20a only is formed on a guide finge 5a and goes up (inboard).In the case, the outside diameter d of guide finge 5d ₁Much smaller than the inside diameter D of guide finge 6a ' (in the vehicle of common size or littler vehicle, be preferably 10mm or about), guide finge 5d is inserted into (d among the described guide finge 6a ' on whole length ₁≤ D-0.5mm, preferably, d ₁=D-0.62mm).In addition, ring 23a ' and 23b ' are separately positioned between two positions on the interior perimeter surface of bullport 6a ' on the one hand, and are arranged on the other hand between two positions on the outer surface of coupling guide finge 5d.This arranges and makes that may prevent to mate guide finge 5d sends sound from the inside of bullport 6a ' in the process of non-vibration.Under the situation of this example, as the axial intermediate portion in the outer surface of guide finge 5d and be arranged in described a pair of small diameter portion 28a ' and 28b ' in the middle of part be extension small diameter portion 29 as the 4th diameter parts of claim 4.The composite structure that it should be noted that guide finge and bullport can change between the inboard and the outside.

＜embodiment 〉

[first embodiment]

Then, with first embodiment who provides among the explanatory drawing 5-7.Under this embodiment's situation, the structure in above-mentioned first reference example, a pair of backing plate is set between one of described a pair of liner 10a and 10b and one of claw 13a and piston 14.Such layout is that the braking torque that the cause owing to the friction between one of two side surfaces of one of the lining 15 of a pair of liner 10a and 10b and rotor 1 is applied on liner 10a and the 10b is difficult to be transferred to clamp 2a in the process of braking.That is, the mutual sliding between the backing plate is better in the process of braking, and bigger like this braking torque will can not be applied on the clamp 2a.

That is, under this embodiment's situation, because swing a little and the displacement of clamp 2a allow, if bigger braking torque is transferred to these clamp 2a, it is unstable that the behavior of these clamp 2a may become.In addition, because the outer surface of each of one of each guide finge 5a, 5a ', 5b and 5c and bullport 6a and 6a ' (referring to Fig. 1-3) is narrower, if bigger braking torque is transferred to clamp 2a in the process of braking, the wearing and tearing of adjacent portion may aggravate.Correspondingly, under this embodiment's situation, the braking torque that is applied to liner 10a and 10b in the process of braking is difficult to be transferred to clamp 2a by following structure.

For this purpose, under this embodiment's situation, be extruded side backing plate 26a, 26b by alignment respectively on the reflecting surface of the dunnage 11 that forms liner 10a and 10b respectively.In addition, squeeze side backing plate 27a, 27b respectively on the distal surface of the piston on the inboard that is incorporated into clamp 2a 14 and be arranged on claw 13 on the outboard end of clamp 2a that survey on surface and align.In addition, be extruded one of side backing plate 26a, 26b and one of squeeze side backing plate 27a, 27b adjacency slidably each other.These backing plates 26a, 26b, 27a, 27b be by the sheet metal manufacturing such as stainless steel etc., and each is provided with the elasticity retainer, is used to keep being added to the parts on it.It should be noted that because the shape of such backing plate 26a, 26b, 27a, 27b and be fixed to the structural similarity of disclosed traditional known backing plate among structure and the patent document 4-10 on the matching block, will detailed explanation and the description of omission.

Under this embodiment's situation, adjacency movably each other on the direction of planar section of the squeeze side backing plate 27a that is extruded side backing plate 26a and is aliging on the distal surface of piston 14 of alignment on the dunnage 11 of inner liner 10a on the plane.Equally, adjacency movably each other on the direction of planar section of the squeeze side backing plate 27b that is extruded side backing plate 26b and is aliging on the inner surface of claw 13a of alignment on the dunnage 11 of inner liner 10b on the plane.Preferably, it should be noted that, grease is applied between the planar section that is adjacent to each other in each such combination, and perhaps the formed film of the material with lower friction factor such as polyamide resin, teflon etc. is formed on one or two abutment surfaces of planar section.

Under this embodiment's situation, by above-mentioned backing plate 26a, 26b, 27a, 27b are provided, the braking torque that is applied to liner 10a and 10b in the process of braking may be difficult to be delivered to clamp 2a.That is, the braking torque that is applied to liner 10a and 10b in the process of braking carries by the supporting element 3a (referring to Fig. 1) of support pad 10a and 10b.But the part of this braking torque is passed to clamp 2a by piston 14 and claw 13a.When the braking torque that is delivered to clamp 2a becomes very big like this, clamp 2a unsettled degree that becomes in the process of braking becomes and can note, may aggravating of the outer surface of one of each guide finge 5a, 5a ', 5b and 5c and one of bullport 6a, 6a ' in abutting connection with wearing and tearing, as previously mentioned.By contrast, under this embodiment's situation, along with the slip of the abutment surface of the planar section of backing plate 26a, 26b, 27a, 27b, braking torque is difficult to be transferred to clamp 2a.For this reason, can suppress the wearing and tearing of the interior perimeter surface of the outer surface of the instability wearing and tearing of lining 15 and guide finge 5a, 5a ', 5b and 5c and bullport 6a, 6a '.In addition, clamp 2a and liner 10a and 10b become and are easy to move, and the effect of Chan Shenging is to be suppressed at noise and the shake in the process of braking like this.

In addition, under this embodiment's situation, guide finge 5a, 5a ', 5b and 5c respectively rotor 1 axially on their relative ends on have small diameter portion 28a, 28b, 28a ' and 28b ', each relatively wherein these pins 5a, 5a ', 5b and 5c be fixed on wherein bullport 6a, 6a ' each have preliminary dimension or bigger gap.In addition, guide finge 5a, 5a ', 5b and 5c respectively rotor 1 axially on their intermediate portions in have major diameter part 20a, 20b, 20c and the 20a ' of diameter greater than small diameter portion 28a, 28b, 28a ' and 28b '.For this reason, based in the process of braking from the power of the rotor 1 clamp 2a that is applied to, just may make this become littler as the momentum of a mass action on these clamp 2a, and may be effectively relatively the in-plane of rotor 1 suppress these clamp 2a inclination.As a result, just may suppress the generation of the uneven wear in the lining 15 of liner 10a and 10b effectively, and more effectively suppress brake noise and shake in the process of braking.

Then with reference to Fig. 8,9, the detailed description of the reason that the generation that provides the uneven wear of lining 15 can be suppressed with above-mentioned mode.At first, Fig. 8 has shown that each guide finge 5 and each bullport 6 of fixing these guide finge 5 axially movably engage each other, and its mode is with identical with reference to the conventional construction shown in top Figure 21,22.Similar among the embodiment therewith, be extruded side backing plate 26a, 26b and squeeze side backing plate 27a, 27b keep by each matching block, described matching block by unshowned retainer the inner surface of the claw 13a of clamp 2a and outside between the reflecting surface of dunnage 11 of liner 10b and alignment between the reflecting surface of the dunnage 11 of the distal surface of piston 14 and inner liner 10a.Such structure shown in Fig. 8 has also fallen in the technical scope of the present invention.Under the situation of the such structure shown in Fig. 8, be easy to make act on every pair be extruded and squeeze side backing plate 26a, 26b, 27a, 27b between frictional force fully little.For this reason, can be so that form fully little momentum M by the power that in the process of braking, is acted on from liner 10a, the 10b of rotor 1 based on acting on claw 13a and piston 14 ₁' and M ₂'.Correspondingly, the in-plane of the relative rotor 1 of clamp 2a is difficult to tilt in the process of braking, so just can suppress the generation of the uneven wear among liner 10a and the 10b.Especially because claw 13a and in clamp 2a zone the bigger fact of length between the inclination center under the in-plane of rotor 1 situation about tilting relatively, act on the momentum M on this claw 13a ₁' become greater than the momentum M that acts on the piston 14 ₂'.For this reason, make to be extruded the inclination that suppresses clamp 2a with squeeze side backing plate 26b and 27b and to become possible effect and compare by on the reflecting surface of the dunnage 11 of the distal surface of piston 14 and inner liner 10a, providing and be extruded that to obtain effect more obvious with squeeze side backing plate 26b and 27b by providing on the inner surface of claw 13a and on the reflecting surface of the dunnage 11 of outer liner 10b.

In addition, in the structure shown in Fig. 8, be extruded side backing plate 26a, 26b and keep by retainer on the dunnage 11 by liner 10a and 10b respectively.Therefore, the relative displacement that is extruded on the in-plane with the matching block of squeeze side backing plate 26a, 26b, 27a, 27b is unrestricted.For this reason, the matching block of these backing plates 26a, 26b, 27a, 27b becomes and is easy to move, and acts on the momentum M on claw 13a and the piston 14 in the process of braking ₁', M ₂' can become very little effectively, the effect that makes the inclination can obtain to prevent clamp 2a effectively.As a result,, can more effectively be suppressed at the uneven wear that is occurred in the lining 15 of liner 10a and 10b according to structure shown in Figure 8, and the brake noise and the shake that are taken place in the process that more effectively suppresses to brake.Compare with the structure shown in Fig. 8, in patent document 7 under the situation of disclosed structure, backing plate is connected respectively to the reflecting surface of the dunnage of the distal surface of piston and inner liner, but backing plate is not installed on the reflecting surface of dunnage of claw and outer liner.In patent document 7 under the situation of disclosed such structure,, suppress effect that clamp tilt substantially less than situation of the present invention for above-mentioned described reason.

In addition, under the situation of this embodiment shown in Fig. 5-7, except by also obtaining following effect the effect that structure obtained shown in above-mentioned Fig. 8.That is, under this embodiment's situation, as among Fig. 9 in detail as described in, each guide finge 5e rotor 1 axially on opposed end on, each relatively wherein the bullport 6a that is fixed of guide finge 5e have part 28a and 28b between predetermined size or the bigger pin.In addition, rotor 1 axially on intermediate portion on, each guide finge 5e has major diameter part 20d, the diameter of described major diameter part 20d is greater than the diameter of small diameter portion 28a, 28b.For this reason, anastomosis part o between bullport 6 and the guide finge 5 can be placed on the inner surface and the slip interface between the outer squeeze side backing plate 27b of claw 13a on the one hand, on the other hand, on the distal surface that axially is set up piston 14 and the slip interface between the interior squeeze side backing plate 27a of relative rotor 1.In the process of braking, this anastomosis part o as based on from rotor 1 by outer liner 10b be extruded the power that is applied to claw 13a with squeeze side backing plate 26b and 27b and be used as the momentum M that is applied on the claw 13a ₁Rotating center, and also as based on from rotor 1 by inner liner 10a be extruded the power that is applied to piston 14 with squeeze side backing plate 26a and 27a and be used as the momentum M that is applied on the piston 14 ₂Rotating center.For this reason, momentum M ₁And M ₂Act on the facing surfaces and do and make thus that in order to skew each other in the process of braking the momentum that acts on the clamp 2a becomes littler generally.Like this, just can more effectively obtain to prevent the effect of clamp 2a inclination.As a result, just can more effectively suppress the generation of the irregular wear in the lining 15 of liner 10a and 10b, and the brake noise and the shake that more effectively suppress in the braking process to be taken place.

It should be noted that Fig. 9 shown act on clamp 2a and the situation the when overall shape of the bus of formed major diameter part 20d is the circular arc of giving prominence on the axial intermediate portion of guide finge 5e under moment M on their the rotating center o ₁, M ₂But, also be that major diameter at guide finge 5e is placed so that partly the shape of the bus of intermediate portion becomes under the situation of straight line, as above with reference to shown in Fig. 2 (a) and 2 (c), anastomosis part between guide finge 5e and the bullport 6e can be easy to be placed on the inner surface and the slip interface between the outer squeeze side backing plate 27b of claw 13a on the one hand, on the other hand, be set up on the distal surface and the slip interface between the interior squeeze side backing plate 27a of piston 14.According to each guide finge 5e wherein rotor 1 axially on have on its relative end small diameter portion 28a, 28b and rotor 1 axially on have diameter greater than the major diameter part 28a of the diameter of small diameter portion 28a, 28b, the structure of 28b in the intermediate portion, the bullport 6a that each relative guide finge 5e of wherein said small diameter portion 28a, 28b is fixed to has preliminary dimension or bigger gap, just can be so that make that in the process of braking the moment on the clamp 2a that acts on diminishes.In addition, just can more effectively obtain to prevent the effect of clamp inclination.

Because first reference example shown in Fig. 1-3 of other layout relevant with first embodiment and action and above-mentioned reference is similar, will repeat no more.

Then, will provide by testing given determining by the effect that structure obtained shown in Fig. 5-8 of as above reference.Described test comprises that by use belonging to enforcement product 1 of the present invention carries out with the comparative product 1-3 different with the present invention with 2 five types floating caliper disc brake.This explanation of five types is displayed in the following table 1.That is, implement product 1 and have and similar structure shown in Figure 8, and on the inboard of rotor 1 relatively and the outside, have respectively and be extruded and squeeze side backing plate 26a, 26b, 27a, 27b.In addition, enforcement product 2 has the similar structure to first embodiment shown in Fig. 5-7, and on the intermediate portion of guide finge 5a, 5a ', be provided with major diameter part 20a, 20a ', and on their both sides, have small diameter portion 28a, 28b, 28a ' and 28b ' respectively, except the structure of implementing product 1.In addition, comparative product 1 has with reference to the conventional construction shown in above-mentioned Figure 21 and 22, and backing plate only is installed on the reflecting surface of dunnage 11 of liner 10a and 10b, and backing plate is not installed on the distal surface of the inner surface of claw 13a and piston 14.In addition, comparative product 2 have to patent document 7 in disclosed product have similar structure.That is, be extruded with the squeeze side backing plate and only be installed on the distal surface of the reflecting surface of dunnage 11 of inner liner 10a and piston 14.In addition, in comparative product 3, push and be extruded on the reflecting surface of dunnage 11 that the side backing plate only is installed in outer liner 10b and on the inner surface of claw 13a.

[table 1]

	Backing plate	Major diameter part+the small diameter portion of guide finge
			Implement product 1	Pushing and be extruded the side backing plate appears on the interior outside	Do not have
Implement product 2	The same	Occur
			Comparative product 1	On the liner side in backing plate appears on the outside	Do not have
Comparative product 2	Push and be extruded the side backing plate and only appear on the inboard	The same
			Comparative product 3	Pushing and be extruded the side backing plate only appears on the outside	The same

In addition, by use implementing product 1,2 and comparative product 1-3, the angle of inclination of the central axis of clamp 2a supplies in the different separately state of oil pressure (brake fluid oil) of the pressure oil of cylinder portion 12 measured therein in braking process.Figure 10 has shown the test result of doing like this.It should be noted that in Figure 10 solid line a and b have shown enforcement product 1,2 respectively, dot and dash line c-e has shown comparative product 1-3 respectively.

Shown test result clearly from Figure 10, be extruded the relative respectively rotor 1 of backing plate 26a, 26b therein and be arranged under the situation on the inboard and the outside, just can in the process of braking, make the angle of inclination of clamp 2a be small enough to greater than 50% under the situation of comparative product 1-2 with squeeze side backing plate 27a, 27b.In addition, guide finge 5a, 5b, 5c and 5a ' have in the enforcement product 2 of major diameter part 20a, 20b, 20c, 20a ' and small diameter portion 28a, 28a ', 28b, 28b ' respectively on their intermediate portion therein, preliminary dimension or bigger gap are set between each of each and bullport 6a, 6a ' of these small diameter portion 28a, 28a ', 28b, 28b ', and this just may make the angle of inclination of clamp 2a than become littler under the situation of implementing product 1 in the process of braking.

[second embodiment]

Then, Figure 11-13 has shown the second embodiment of the present invention.Under this embodiment's situation, four retainers 30 are formed in the core of squeeze side backing plate 27a, and its mode makes comes towards piston 14 side projectioies (right-hand side among Figure 11) by the inboard of crooked U otch.These retainers 30 are to be held on the inboard of the open end of piston 14.In addition, be extruded on the outside diameter periphery of side backing plate 26a in an outside diameter side retainer 32 is respectively formed at and on the inside diameter side periphery, its mode makes towards dunnage 11 sides (left-hand side among Figure 11) of inner liner 10a.The outside diameter of retainer 31,32 and inside diameter side retainer 31,32 remain on and keep among groove 33a and the 33b, keep groove 33a, 33b to be respectively formed on the outside diameter side periphery and inside diameter side periphery of dunnage 11.By such layout, in be extruded displacement radially the suffering restraints of side backing plate 26a at rotor 1 (in other) referring to Fig. 1 with the relative inner liner 10a that makes progress in week.

In addition, under this embodiment's situation, two retainers 34 are formed in the core of outer squeeze side backing plate 27b, and its mode makes it possible to inboard by crooked U-shaped otch towards claw 13a side (right-hand side among Fig. 1 2) projection.Keep on the inboard of the depression 35 of these retainers 34 in the core that is arranged on this claw 13a.Form a pair of extrusion 36 that this claw 13a is used for liner 10b outside rotor 1 extruding and become littler (narrower), as shown in Figure 13.For this reason, by forming greater than the spacing L between the far-end of these extrusions 36 between the retainer 34 ₃₆Spacing L ₃₄(L ₃₄＞L ₃₆), relative claw 13a can move down in Fig. 2,13 just can to prevent squeeze side backing plate 27b to become.Simultaneously, be respectively formed at the similar of the outer outside diameter side backing plate 26a that is extruded side backing plate 26b and inside diameter side periphery to the interior similar outside diameter side retainer 31 of side backing plate 26a and the inside diameter side retainer 32 of being extruded.Outside diameter and inside diameter side retainer 31,32 keep in keeping groove 33a, 33b, and described maintenance groove 33a, 33b are respectively formed on the inside diameter side periphery and outside diameter side periphery of supporting portion 11 of outer liner 10b.By such layout, rotor 1 radially with circumferential direction on the outer displacement that is extruded side backing plate 26b suffer restraints.

In addition, be extruded with squeeze side backing plate 26a, 26b, 27a, 27b by sheet metal manufacturing such as stainless steel etc.Rubber coating is separately positioned on the side surface of interior squeeze side backing plate 27a relative with piston 14 and the outer squeeze side backing plate 27b relative with claw 13a.In addition, fluoresent coating be set at interior squeeze side backing plate 27a mutually sliding contact in be extruded on the side surface of two side surfaces of side backing plate 26a and be extruded on the side surface of two side surfaces of side backing plate 26b with outer squeeze side backing plate 27a phase sliding contact outer.

Under this embodiment's who constructs as mentioned above situation, because side surface is provided with rubber coating or fluoresent coating, be extruded with squeeze side backing plate 27a, 27b, 26a, 26b and can in the process of braking, more easily relatively move, and can more effectively suppress the generation of abnormal noise.

Because first embodiment's among Fig. 5-7 of other layout and action and above-mentioned reference is similar, identical part is indicated by identical reference character, and repeats no more.

It should be noted that the described structure that the invention is not restricted to this embodiment, and interior and be extruded and push backing plate 26a, 27a, 26b and 27b outward can be by sheet metal manufacturing such as stainless steel etc., and rubber coating or fluoresent coating need not be set.

In addition, in the structure or second embodiment shown in Figure 11-13 of first embodiment shown in Fig. 5-7 of as above reference, although not shown, outward liner 10b lateral bending bent and in common state, can not be arranged on by the bending part that any parts kept outside on the outer diameter side periphery of squeeze side backing plate 27b.Providing under the situation of such bending part because this bending part is by the top of outer liner 10b or be extruded side backing plate 26b outward and keep, just can be outside demonstration on the direction at the center of rotor 1 displacement of squeeze side backing plate 27b.In addition, but not shown bending part crooked on the direction of leaving rotor 1 (referring to Fig. 5) side is extruded on the interior ambient side periphery of side backing plate 26a in can being arranged on.In the case because interior squeeze side backing plate 27a keeps by this bending part, just may be limited on the direction at the center of rotor 1 outside the displacement (downward in Figure 12,13) of squeeze side backing plate 27b.In addition, but not shown bending part crooked on the direction of leaving rotor 1 (referring to Fig. 5) side is extruded on the interior ambient side periphery of side backing plate 26a in can being arranged on.In the case, because interior squeeze side backing plate 27a keeps by this bending part, just can limit interior squeeze side backing plate 27a in the displacement (downward in Figure 11) on the direction at the center of rotor 1.

In addition, in first embodiment shown or second embodiment's shown in Figure 11-13 structure with reference to as above Fig. 5-7, although it is not shown, be arranged on the backing plate that has rubber coating on the both sides can be clamped in each liner 10a, 10b at least and respectively be extruded between side backing plate 26a, the 26b and the inner surface of the distal surface of each piston 14 and claw 13a and each squeeze side backing plate 27a, 27b between at least one spacing on, the undesired noise that is produced more effectively to suppress in the braking process.In addition, have be arranged on two resin-coated backing plates of the thermal insulation on the side can each liner 10a, 10b at least and respectively be extruded between side backing plate 26a, the 226b and the inner surface of the distal surface of each piston 14 and claw 13a and each squeeze side backing plate 27a, 27b between at least one spacing on clamp, be transferred to clamp 2a with the heat that in the process of braking, suppresses to be produced between rotor 1 and liner 10a, the 10b.

[the 3rd embodiment]

Then, Figure 14 has shown the third embodiment of the present invention.Under this embodiment's situation, in reference above-mentioned second embodiment's shown in Figure 11-13 structure, in each has a circular cross section a pair of two ends that keep on the width direction (on the left and right directions among Figure 14) that projection 41 is set at outer squeeze side backing plate 27b, and the mode of formation is that (foundation) is towards claw 13a side projection.In addition, each a pair of retaining hole 42 with circular cross section is set on the internal surface (reflecting surface among Figure 14) of a pair of extrusion 36 that forms this claw 13a.These ends that are positioned at the retaining hole 42 of leaving rotor-side can or cannot penetrate the outer surface (rear surface) of extrusion 36.Keep projection 41 to pass through retaining hole 42 in the retaining hole 42 and keep by being press fit into.By such layout, squeeze side backing plate 27b misplaces on the in-plane of this squeeze side backing plate 27b relative to claw 13a and moves.

Because other layout is similar with action and second embodiment's shown in the above-mentioned Figure 11-13 of reference, identical part will be represented by identical reference character, and repeat no more.

[the 4th embodiment]

Then, Figure 15 has shown the fourth embodiment of the present invention.Under this embodiment's situation, in structure with reference to second embodiment shown in above-mentioned Figure 11-13, have the maintenance projection 43 that hangs bell shape cross section and be set in the core of outer squeeze side backing plate 27b, and the mode of (foundation) of being formed is feasible towards claw 13a side projection.This inboard of depression 35 that keeps projection 43 to be press fit in the core that is formed on claw 13a also keeps by this claw 13a thus.Arrange that by this squeeze side backing plate 27b is prevented from misplacing on the in-plane of this squeeze side backing plate 27b relative to claw 13a and moves.

Because other layout and action are similar with second embodiment of reference shown in above-mentioned Figure 11-13, identical part will be represented by identical reference character, and repeat no more.

Should be noted that the maintenance projection 43 that the inboard kept that is used for the depression 35 by claw 13a is not limited to the shape shown in Figure 15, and for example keep protruding 43a can have almost circular shape of cross section, as shown in figure 16.

[the 5th embodiment]

Then, Figure 17 has shown the fifth embodiment of the present invention.Under this embodiment's situation, in structure with reference to second embodiment shown in above-mentioned Figure 11-13, in a pair of each maintenance projection 44 with circular cross section is set on the width direction of squeeze side backing plate 27a in two ends on (on the left and right directions among Fig. 1 7), and the mode that forms is that (foundation) is towards piston 14 side projectioies.These keep projection 44 by keeping in the inboard of piston 14 via the circular open that is press fit into piston 14.For this reason, under this embodiment's situation, in keeping the state of projection 44 before being press fit into the inboard of this piston 14, the length L between these parts of the outer periphery of the maintenance projection 44 on the width direction in squeeze side backing plate 27a on the outermost ₄₄Be set up less times greater than the inner diameter d of the opening of piston 14 ₁₄(L ₄₄＞d ₁₄).Arrange that by this squeeze side backing plate 27a is prevented from misplacing on the in-plane of this squeeze side backing plate 27a relative to piston 14 and moves.

Because other layout is similar with action and second embodiment's shown in the above-mentioned Figure 11-13 of reference, identical part will be represented by identical reference character, and repeat no more.

[the 6th embodiment]

Then, Figure 18 has shown the sixth embodiment of the present invention.Under this embodiment's situation, in structure with reference to second embodiment shown in above-mentioned Figure 11-13, in maintenance projection 45 with semi-circular cross-sections is set in the core of squeeze side backing plate 27a, and the mode of (foundations) of being formed is feasible towards piston 14 side projectioies.This inboard interior of circular open that keeps projection 45 to be press fit into piston 14 also keeps by this piston 14 thus.Arrange that by this squeeze side backing plate 27a is prevented from misplacing on the in-plane of this squeeze side backing plate 27a relative to piston 14 and moves.

Since other layout with and action and second embodiment of reference shown in above-mentioned Figure 11-13 similar, identical part will be represented by identical reference character, and repeat no more.

[the 7th embodiment]

Then, Figure 19,20 has shown the seventh embodiment of the present invention.Under this embodiment's situation, curved section 37 with circular shape cross section is set at the internal diameter side (lower end among Figure 19,20) of outer squeeze side backing plate 27b, its mode make on the whole length on the width direction towards claw 13a bending (on direction) perpendicular to Figure 19,20 plane.In addition, the column part that is parallel to the central axis of rotor 1 is set in far-end half one of this curved section 37.In addition, bending part 38 is set on the outside diameter side of squeeze side backing plate 27b, and its mode makes that liner 10b is crooked on whole length on the direction of width outward.Even squeeze side backing plate 27b is tending towards leaving towards internal side diameter from claw 13a outside, this bending part 38 is used to prevent its generation.In addition, each have the inside diameter of circular cross section and outside diameter side bent portions 39 and 40 be separately positioned on the inside diameter and outside diameter side of squeeze side backing plate 27a, its mode make on the direction of width on the whole length towards piston 14 lateral bending songs (on direction) perpendicular to the plane among the figure among Figure 19.Be arranged on the outer squeeze side backing plate 27b curved section 37 be arranged on the squeeze side backing plate 27a inside diameter and outside diameter side bent portions 39,40 respectively with outer, in to be extruded the surface of side backing plate 26b and 26a relative respectively.

Under this embodiment's who constructs as mentioned above situation, even on the direction shown in the arrow B of clamp 2a in Figure 19, be independent of rotor 1 and liner 10a, 10b for certain reason or other and swing and displacement, being extruded can smooth each other slip with squeeze side backing plate 26a, 26b, 27a and 27b, makes stably to obtain required braking force.For example, under the situation of clamp 2a outer and inner relatively liner 10b, 10a counter-clockwise swing and displacement in Figure 19,20, extruding force stably is extruded side backing plate 26b from what claw 13a was delivered to that liner 10b outside aligns by the curved section 37 on the squeeze side backing plate 27b outside being arranged in the process of braking.Similarly, the curved section 40 that extruding force can be by squeeze side backing plate 27a in being arranged on stably is transferred to what inner liner 10a alignd from the distal surface of piston 14 and is extruded side backing plate 26a.In addition, clamp 2a in Figure 19,20 under the situation that liner 10b, 10a swing clockwise and move, extruding force stably is delivered to what inner liner 10a alignd from piston 14 by the inner diameter side bent portions 39 on the squeeze side backing plate 27a in being arranged on and is extruded side backing plate 26a in the process of braking.As a result, even under the situation that clamp 2a is swung and moves, also can stably obtain required braking force.In addition, because being bent part 37 and outside diameter and inside diameter side bent portions 40,39 is set up, just may be easy to comply with satisfactorily oscillating motion and the displacement of clamp 2a for outer and inner squeeze side backing plate 27b, 27a, and no matter this oscillating motion and displacement.

Because other layout is similar with action and first embodiment's shown in the above-mentioned Fig. 5-7 of reference, identical part will be represented by identical reference character, and repeat no more.

Describe by the situation that two pins are used although should be noted that the foregoing description and reference example, when embodiment is of the present invention, can use the guide finge of three or more.In addition, being extruded side backing plate 26a and 26b and squeeze side backing plate 27a and 27b can be respectively wait on the surface of the dunnage 11 that is fixed to the liner 10a, the 10b that leave rotor 1 arrangement and on the squeeze side of piston 14 and claw 13a by bonding.

As mentioned above, the present invention is elaborated with reference to certain embodiments, and still, under the situation that does not deviate from the spirit and scope of the present invention, those of ordinary skill can carry out different modifications, replacement and increase.

The present invention is based on Japanese patent application of being submitted on April 3rd, 2003 (P.2003-099949) and the Japanese patent application of being submitted on March 12nd, 2004 (P.2004-071419), incorporate into for your guidance herein.

Industrial applicability

In the situation of the floating caliper disc brake of constructing as mentioned above, be extruded side backing plate and squeeze side backing plate appear at claw and leave between the surface of one of a pair of liner that rotor-side settles and piston and leave between the surface of another one liner of rotor-side on, these backing plates are adjacent to each other each other slidably. For this reason, the frictional force that acts between the surface of these backing plates can be easy to become fully little. For this reason, based on being applied to the power on claw and the piston so that moment is fully little by liner from rotor, the in-plane of clamp relative rotor in the process of braking is difficult to tilt in the braking procedure. As a result, be difficult to suppress the generation of uneven wear in the liner. In addition, in situation of the present invention, be extruded the side backing plate and be respectively fixed to or keep by gripper shoe, the squeeze side backing plate is respectively fixed to or the squeeze side by claw and piston keeps. For this reason, these are extruded with the relative displacement of squeeze side backing plate not restricted on the in-plane. For this reason, it is mobile that these backing plates are easy to, and in the process of braking, acts on moment on claw and the piston and can effectively obtain the effect that prevents that clamp from tilting. As a result, according to the present invention, in the process of braking, just can effectively prevent the generation of uneven wear in the liner, and effectively suppress the generation of brake noise and shake.

Claims (9)

1. floating caliper disc brake comprises:

Supporting element, described supporting element are fixed to vehicle body and adjacent to taking turns the rotor rotated setting;

A pair of liner, it axially supports described a pair of liner slidably in the upper edge, two sides of rotor by supporting element;

Clamp, described clamp rotor axially on supported movably, clamp support by a plurality of guide finge that are arranged on a plurality of bullports in the supporting element and be separately fixed in the bullport;

Claw, described claw are set on the side of bridge part of clamp, and bridge part strides across rotor; And

Piston, described piston are arranged on the other side,

Wherein since two side surfaces of the described a pair of liner extruding rotor of the result of the extension of piston implementing braking,

Be extruded the side backing plate and kept by these surfaces of the dunnage of the described a pair of liner by leaving rotor-side respectively,

The squeeze side backing plate keeps by the squeeze side of claw and piston respectively; And

It is adjacent slidably each other with each squeeze side backing plate that each is extruded the side backing plate.

2. floating caliper disc brake according to claim 1, it is characterized in that, each of described a plurality of guide finge rotor axially on have first diameter parts on its each opposed end, the bullport that the relative wherein guide finge of described first diameter parts is engaged has preliminary dimension or bigger gap, and

At least one guide finge rotor axially on the intermediate portion in comprise second diameter parts, the diameter of described second diameter parts is greater than the diameter of first diameter parts.

3. floating caliper disc brake according to claim 1, it is characterized in that, have the circular shape cross section and be set at towards the curved section of the edgewise bend of claw or piston on the end of at least one squeeze side backing plate keeping or fixed press side backing plate, described curved section is relative with a surface that is extruded the side backing plate.

4. floating caliper disc brake according to claim 2, it is characterized in that, in described a plurality of guide finge, a guide finge except guide finge with second diameter parts rotor axially on the intermediate portion in comprise three diameter parts of diameter greater than first diameter parts.

5. floating caliper disc brake according to claim 2, it is characterized in that, in described a plurality of guide finge, a guide finge except the guide finge with second diameter parts comprises the 4th diameter parts, described the 4th diameter parts connect first diameter parts and with the interior perimeter surface of relative bullport have preliminary dimension or bigger gap rotor axially on extend.

6. floating caliper disc brake according to claim 4, it is characterized in that, also comprise and have large diameter the 3rd diameter parts, the shape of the bus of described second diameter parts or the 3rd diameter parts is dome arc, the shape of straight section by the clamping of a pair of dome arc and one of trapezoidal wherein.

7. floating caliper disc brake according to claim 4 is characterized in that, also comprises to have large diameter the 3rd diameter parts, and described second diameter parts or the 3rd diameter parts and described guide finge are integrally formed.

8. floating caliper disc brake according to claim 4, it is characterized in that, also comprise and have large diameter the 3rd diameter parts, described second diameter parts or the 3rd diameter parts are formed on sleeve is engaged in guide finge and when being fixed to guide finge.

9. floating caliper disc brake according to claim 4, it is characterized in that, also comprise and have large diameter the 3rd diameter parts, the ring of elastic material is engaged on each axial opposite flank of guide finge of clamping second diameter parts or the 3rd diameter parts.

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