JP2010270799A - Method for arranging return spring for disk brake device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for arranging a return spring for a disk brake device, easily preventing jumping-out or falling of the return spring while minimizing the functional effect by wear of a brake pad. <P>SOLUTION: In the method for arranging a return spring which includes a folded part and an arm part and is disposed each in the rotating-in direction and the rotating-out direction of a rotor relative to brake pads oppositely disposed in a disk brake device to separate the brake pads from the rotor, the folded parts in the two return springs are opposed to each other, the two return springs are disposed on the brake pads with the opposed folding parts connected to each other, and side surfaces of a lining-corresponding part in the brake pads is held by leading ends of the arm parts in the two connected return springs. Further, an extension suppression part is provided on a pad clip to prevent excessive extension of the leading ends of the arm parts. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a disc brake device, and more particularly to a method of arranging a return spring (V spring) for separating a brake pad after releasing a brake from a rotor.

  In the disc brake device, as a problem when the return spring is used as a configuration for separating the brake pad from the rotor, there are many cases where the assembling property is poor. However, the return spring also has a problem when it is removed. Specifically, the event is as follows. In a caliper floating type disc brake device, remove one of the slide pins that connect the caliper and the support, rotate the caliper with respect to the other slide pin to expose the brake pad, and then remove the return spring. It becomes. Here, in the caliper floating type disc brake device, in order to prevent the brake pad exposed as the caliper rotates from falling off due to the force of the return spring, the pressure plate of the exposed pair of brake pads is attached to one hand. The other part of the hand was used to remove the return spring. As a disc brake device for removing the return spring in such a process, for example, the one disclosed in Patent Document 1 can be cited. However, in the case of a return spring as disclosed in Patent Document 1, when the brake pad is sandwiched with one hand and the return spring is removed with the other hand, the return spring is scattered and lost or scattered. The return spring hit the body.

  Since the return spring disclosed in Patent Document 1 is arranged on the rotor entrance and exit sides with respect to the pair of brake pads, only one of the return springs is scattered. Can occur. For this reason, what is indicated by patent documents 2 can be mentioned as a return spring of the composition which can control the jumping out of such a return spring. The return spring disclosed in Patent Document 2 is such that the apex portions of a pair of return springs are connected by welding or a connecting member.

Japanese Patent Laid-Open No. 10-132000 JP-A-57-179435

  However, the return spring as disclosed in Patent Document 2 employs an arrangement form in which a through hole is formed in the pressure plate of the brake pad and the tip of the return spring is fitted therein. In such an arrangement, if the distance between the connecting portion of the two return springs and the tip portion changes with the decrease of the brake pad, the return spring may not function well.

  Accordingly, an object of the present invention is to provide a method for arranging a return spring for a disc brake device that can more easily prevent the return spring from jumping out and falling, and that is less affected by the functional surface due to the reduction in brake pads.

  In order to achieve the above object, a return spring arrangement method according to the present invention includes a turn-back portion and an arm portion. In contrast, the return springs are arranged in each of the rotor turning-in direction and the turning-out direction. The return springs of the two return springs face each other, and the two return springs faced each other. The folded portions are arranged on the brake pad in a state of being connected to each other, and the tip ends of the arm portions of the two connected return springs can contact the side surface of the lining corresponding portion of the brake pad.

  Moreover, when it has the above characteristics, Preferably, the side surface of the lining equivalent part in the said brake pad is pinched | interposed by the front-end | tips of the said arms in the two connected return springs.

  In the return spring arrangement method having the above-described features, the two return springs can be connected by crossing the folded portions in a chain shape.

  By adopting such a method, the return spring is restricted from moving in the circumferential direction of the rotor, and no other member is required to connect the two return springs. Therefore, it is possible to reduce the number of parts when the brake pads are assembled to the disc brake device. In addition, it is possible to reliably prevent loss due to the return spring being scattered far away.

In addition, by sandwiching the side surface of the lining, the return spring stably expands the pressure plate without moving in the circumferential direction of the rotor.
Further, in the return spring arrangement method having the above-described features, the tip of the arm portion is provided with an expansion suppressing portion that suppresses the expansion of the return spring to the pad clip in the disc brake device, and the return spring includes: After the tip of the arm portion comes into contact with the expansion suppressing portion, further expansion can be suppressed.

  By adopting such a method, the opening force of the return spring (the urging force of the brake pad against the pressure plate) is suppressed by the front end of the brake spring striking the pad clip. The Therefore, it is possible to avoid a situation in which the brake pad falls off due to excessive expansion of the return spring. Furthermore, the trouble of one hand holding the pressure plate can be saved.

  Further, when the new brake pad is separated from the rotor by a predetermined distance or more, the spread suppressing part is provided at a position where the new brake pad is not separated from the rotor by the distance or more, and the return spring is spread. It is better to suppress it.

  By having such a feature, the brake pad can be appropriately separated from the rotor, and the brake pad can be prevented from falling off the support.

  According to the arrangement method of the return spring for a disc brake device having the above-described features, it is possible to easily prevent the return spring from popping out and falling. Further, it is not necessary to keep pressing the pressure plate after the caliper is rotated. Therefore, the return spring can be securely attached and detached with both hands.

It is a figure which shows the example of the disc brake device as object which implements this invention. It is a figure which shows the example of the arrangement | positioning method of the return spring which concerns on 1st Embodiment. It is a figure for demonstrating the relationship between the return spring which makes a pair, and the lining in a brake pad. It is a figure which shows the structure of the pad clip used in order to implement the application form of the arrangement method of the return spring which concerns on 1st Embodiment. It is a figure explaining the application form of the arrangement | positioning method of the return spring which concerns on 1st Embodiment. It is a figure which shows the example of the arrangement | positioning method of the return spring which concerns on 2nd Embodiment. It is a figure explaining the application form of the arrangement | positioning method of the return spring which concerns on 2nd Embodiment. It is a figure which shows the example of the brake pad which can be used when implementing invention. It is a figure which shows the 1st form which concerns on the return spring which can be used in implementing invention. It is a figure which shows the 2nd form of a return spring. It is a figure which shows the 3rd form of a return spring. It is a figure which shows the 4th form of a return spring. It is a figure for demonstrating the suitable form of a return spring.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments relating to a method for arranging a return spring for a disc brake device according to the present invention will be described below in detail with reference to the drawings.
First, a disc brake device for carrying out the method according to the present invention will be described with reference to FIG. 1A is a front view of the disc brake device, and FIG. 1B is a diagram showing a partial left side cross section in FIG. 1A.

  The disc brake device 10 shown in FIG. 1 is a caliper floating type, and is configured based on a caliper 20 and a support 40, brake pads 50 and 60, and a rotor 80.

  The caliper 20 includes a cylinder portion 22 disposed on the inner side via the rotor 80, a claw portion 26 disposed on the outer side, and a bridge portion that connects the cylinder portion 22 and the claw portion 26 so as to straddle the rotor 80. 24, and an arm portion 30 for holding the caliper 20 on the support 40. As for the inner side and the outer side, the vehicle inner side of the rotor 80 is referred to as an inner side and the opposite side is referred to as an outer side with reference to a vehicle (not shown).

  A piston 28 is provided inside the cylinder portion 22. The piston 28 is pushed out by hydraulic oil introduced into the cylinder portion 22. That is, the hydraulic oil that is sent along with the brake operation flows into the cylinder portion 22, thereby pushing the piston 28 disposed inside the cylinder portion 22 toward the rotor 80.

The claw portion 26 is a pressing portion of a brake pad (outer side brake pad) 60 provided to face the cylinder portion 22 described above.
The bridge portion 24 is a connecting portion that connects the cylinder portion 22 and the claw portion 26 described above, and is disposed so as to straddle the rotor 80 interposed therebetween.

  The arm portion 30 is an engaging portion for fixing the caliper 20 to the support 40. In the case of this embodiment, the connecting portion of the base end portion is the cylinder portion 22 and the rotor 80 is turned in and out. A pair of arm portions 30 are extended to each of the two. A through hole (not shown) for inserting and fixing the slide pin 32 is formed at the tip of the arm portion 30. The slide pin 32 is a support member for supporting the caliper 20 slidably with respect to the support 40.

  The support 40 is a holding member for holding the caliper 20 on a vehicle (not shown). The support 40 according to this embodiment has a brake pad holding portion on each of the inner side and the outer side of the rotor 80. A mounting hole (not shown) and a slide pin hole (not shown) are formed in the support 40 according to the present embodiment.

  The brake pads (the inner brake pad 50 and the outer brake pad 60) include linings 54 and 64 that generate a frictional force with the rotor 80, and a pressure plate 52 that is a metal plate to which the linings 54 and 64 are attached. , 62.

  As shown in FIG. 2, a return spring 70 is assembled to the brake pads 50 and 60. The return spring 70 is a linear spring that plays a role of separating the brake pads 50 and 60 from the rotor 80 in order to prevent the brake pads 50 and 60 from being dragged when the braking operation is released. Specifically, the folded portion 72, the arm portions (one arm portion 74a and the other arm portion 74b) extended at both ends thereof, and the holding portion 76a positioned on the distal end side of the arm portions 74a and 74b. , 76b. The arm portions 74a and 74b provided in a pair and the folded portion 72 provided therebetween are substantially V-shaped or U-shaped, and are bent by the bending of the arm portions 74a and 74b and the folded portion 72. The brake pads 50 and 60 are separated from the rotor 80 by the generated repulsive force.

Two return springs 70 according to the present embodiment are arranged on the turn-in side and the turn-out side of the rotor 80, respectively, with respect to the pair of brake pads 50 and 60 so as to straddle the rotor 80.
Further, two return springs 70 according to the present embodiment are arranged as a pair. As an arrangement form of the return spring 70, after the brake pads 50 and 60 are assembled to the support 40, the holding portions 76 a and 76 b are attached to the side surfaces of the linings 54 and 64 (the side of the rotor on or off). The hooks are arranged so that the arm parts 74a and 74b extend toward the center of the caliper 20, that is, the folded parts 72 of the two return springs 70 arranged on the turn-in side and the turn-out side face each other. Is done. In addition, the return spring 70 according to the embodiment crosses the linear members constituting the two folded portions 72 facing each other and is connected in a chain shape, while pulling each other in the circumferential direction of the rotor 80. The holding portions 76a and 76b of the return spring 70 that form a pair with the side surfaces of the linings 54 and 64 of the brake pads 50 and 60 are assembled so as to be clamped.

  Here, as shown in FIG. 3, the return spring 70 according to the present embodiment has a distance l between the holding portions 76 a and 76 b of the two connected return springs 70 so that the lining 64 (54) of the brake pads 50 and 60 is the same. It is set to be slightly shorter than the length L.

  For this reason, the return springs 70 forming a pair are in an attached state such that the return springs 70 are pulled together with the folded portion 72 connected in a chain shape as a base point. With this configuration, the holding portions 76a and 76b are applied with a force in the direction of pushing back the brake pads 50 and 60 indicated by the arrow A and a force in the direction of holding the linings 54 and 64 indicated by the arrow B. It becomes. Therefore, it is possible to prevent the return spring 70 from falling off in the circumferential direction of the rotor 80 without processing the pressure plates 52, 62 of the brake pads 50, 60, and to push back the brake pads 50, 60. Can be maintained.

  In this way, by making the distance 1 between the holding portions 76a and 76b of the return spring 70 shorter than the length L of the lining 64 (54), in addition to the original action of the return spring 70, the holding portions 76a and 76b are connected to the lining 64. It becomes possible to have an action of sandwiching the side surface of (54). In addition, when the return spring 70 is removed by crossing the turn-back portions 72, the removed return spring 70 is removed even when the brake pads 50 and 60 are held and held with one hand. It will not scatter greatly. In the unlikely event that it scatters, the other return spring is connected, so it will not scatter in the distance and will not be lost.

  In the disc brake device 10 configured as described above, when hydraulic oil is introduced into the cylinder portion 22, the piston 28 disposed inside is pushed out. The pushed piston 28 presses the pressure plate 52 of the inner brake pad 50 held by the support 40. The lining 54 of the inner brake pad 50 pressed against the pressure plate 52 is pressed against the inner sliding surface of the rotor 80.

  When the inner brake pad 50 is pressed against the rotor 80, the pressing force applied to the inner brake pad 50 by the piston 28 acts as a reaction force on the caliper 20. The caliper 20 receiving the reaction force slides toward the inner side so that the slide pin 32 comes out of the slide hole. By this sliding, the claw portion 26 comes close to the outer side sliding surface of the rotor 80, and the lining 64 of the outer side brake pad 60 held on the inner side surface of the claw portion 26 is brought into contact with the outer side sliding surface of the rotor 80. It will be pressed.

  A frictional force is generated between the inner brake pad 50 and the outer brake pad 60 pressed against the rotor 80 and the main sliding surface of the rotor 80, and the rotation of the rotor 80 is applied to both brake pads 50 and 60. The force to move in the outgoing direction works.

  A braking force can be applied to the vehicle by receiving the inner brake pad 50 and the outer brake pad 60 that are about to move in the direction in which the rotor 80 extends in the torque receiving portion of the support 40.

  When the brake operation is released and no hydraulic oil is introduced into the cylinder portion 22, the pressure contact of the brake pads 50 and 60 with respect to the rotor 80 via the piston 28 is released. When the pressure contact between the brake pads 50 and 60 is released, only the repulsive force by the return spring 70 acts on the brake pads 50 and 60. When only the repulsive force by the return spring 70 acts on the brake pads 50, 60, the brake pads 50, 60 move away from the rotor 80, and the drag of the linings 54, 64 with respect to the rotor 80 can be avoided.

  In such a disc brake device 10, one of the two slide pins 32, 32 (for example, the right side in FIG. 1A) is removed, and the other (for example, the left side in FIG. 1A) slide pin 32 is removed. As a base point, for example, when the caliper 20 is rotated in the direction of arrow A (see FIG. 1), the brake pads 50 and 60 may jump out of the support 40 due to the action of the return spring 70. For this reason, when removing the caliper 20, it is necessary to sandwich the brake pads 50 and 60 with one hand.

If the return spring 70 is removed only with the other hand while the brake pads 50 and 60 are sandwiched with one hand, the return spring 70 removed halfway will be scattered by elasticity. However, in the case of the return spring 70 according to the present embodiment, the other return spring 70 that is still in the assembled state and the one return spring 70 that has been removed are connected in a chain shape by the folded-back portion 72, so Accordingly, loss of the return spring 70 can be prevented.
Also, even if the other return spring 70 is missed, both springs remain connected, so there is a low possibility that they will be scattered and lost.

  Next, with reference to FIG. 4 and FIG. 5, the application form which concerns on the arrangement | positioning method of the return spring which concerns on this embodiment is demonstrated. 4A is a perspective view of the pad clip, and FIG. 4B is a side view of the pad clip. FIG. 5 is a partially enlarged view of a state in which a pad clip, a brake pad, and a return spring are assembled to a torque receiving portion in the support, FIG. 5 (A) is a side view, and FIG. 5 (B) is an upper partial sectional view. Indicates. In this embodiment, the arrangement of the return spring 70 is devised by processing the pad clip 90 that plays a role of holding and sliding the brake pads 50 and 60.

  Specifically, the expansion restraining portion (stopper) is connected to the connecting piece 96 that connects the upper piece 94 and the lower piece 98 of the U-shaped portion 92 in the pad clip 90 sandwiching the convex portion 44 in the torque receiving portion 42 of the support 40. The cut and raised piece 99 is provided. As shown in FIG. 5A, the cut-and-raised piece 99 has a height of the cut-off piece between the connecting piece 96 of the pad clip 90 and the brake pad 60 (50) when the brake pad 60 (50) is assembled. Assume that the height is equal to or less than the gap with the notch 63.

  As shown in FIG. 5 (B), the cut-and-raised piece 99 is provided on the outer side (side away from the rotor 80) by Δd from the pressure plates 52 and 62 in the brake pads 50 and 60. Specifically, the value of Δd can be set to 2 mm or more. That is, when the brake pads 50, 60 are moved within the range of support by the pad clip 90 from the sliding surface when the brake pads 50, 60 are new, the return spring 70 is moved beyond that. Expansion is suppressed.

  With such a configuration, the brake pads 50 and 60 themselves can slide on the pad clip 90 regardless of the presence or absence of the cut and raised pieces 99, and the tips of the holding portions 76 a and 76 b in the return spring 70. Is caught by the cut and raised piece 99, and the cut and raised piece 99 plays a role as a so-called stopper.

  As a result, the brake pad 60 (50) is far away from the rotor 80 as compared with the new state (the rotor 80 and the brake pad 60 (50) are largely separated), and the pad is located at a position where the expansion force of the return spring 70 is not required. The cut-and-raised piece 99 provided in the clip 90 prevents the return spring 70 from expanding, and the cut-and-raised piece 99 does not spread outward. Therefore, the brake pads 50 and 60 do not fall out of the pad clip 90 due to excessive expansion of the return spring 70.

  4 and 5, the stopper has a cut-and-raised piece obtained by cutting a part of the connecting piece. However, for example, the stopper may be a convex portion or the like formed by pressing.

  Next, a second embodiment according to the method for arranging a return spring for a disc brake device according to the present invention will be described with reference to FIG. 6A is a perspective view showing the assembled state of the return spring, and FIG. 6B is a side view showing the assembled state.

  The basic configuration of the arrangement method according to the present embodiment is the same as the arrangement method of the return spring according to the first embodiment described above. The difference in arrangement is caused by the configuration of the pressure plate 62 (52) in the brake pad 60 (50) that fixes the return spring 70. That is, in the disc brake device used in the present embodiment, the recess 65 is provided at the return spring arrangement position of the pressure plate 62 in the brake pad 60. The concave portion 65 is provided with a tip end portion 77 of the holding portion 76a (76b) of the return spring 70 at a contact position, and its bottom surface is an inclined surface whose depth increases toward the lower side of the brake pad 60. .

  Further, the return spring 70 in this embodiment has the tip 77 bent slightly outward, that is, toward the pressure plate 62 side. With such a configuration, the tip 77 can be dropped into the recess 65, and a high effect can be obtained in preventing the return spring from falling off.

  Even in the case of adopting such an arrangement, the return spring 70 has an action of sandwiching the lining 64 in addition to the action of pushing the brake pad 60 wide. Here, since the recess 65 formed in the pressure plate 62 of the brake pad 60 can be formed by press working at the time of forming the pressure plate 62, the number of manufacturing steps is not changed.

  Next, an application form of the return spring arrangement method according to the second embodiment will be described with reference to FIG. 7A is a perspective view showing the assembled state of the return spring, and FIG. 7B is a side view showing the assembled state.

  The arrangement method of the return spring according to this embodiment is such that the recess 65 provided only in the tip contact portion of the pressure plate 62 in the above basic form is a groove 67 provided from the upper part of the brake pad to the tip contact portion of the return spring. The holding portion 76 a (76 b) of the return spring 70 is fitted into the groove (recessed portion) 67.

In the case of such a configuration, the ratio of the portion of the holding portion 76a that enters the groove 67 increases. Therefore, the effect of preventing the return spring 70 from falling off and the effect of preventing the displacement of the assembly position associated with the reduction of the lining 64 are enhanced.
About another structure, an effect | action, and an effect, it is the same as that of the arrangement | positioning method of the return spring which concerns on the basic form mentioned above.

  In any of the above-described embodiments, the brake pad 60 corresponding to the arrangement of the return spring 70 will be described with reference to an example in which the pressure plate 62 has a concave notch (notch 63) as a holding part. Yes. However, as shown in FIG. 8, the brake pad 60 may have a protruding protrusion (ear portion 68) instead of the recessed notch.

  Further, as an example of a disc brake as an object for implementing the return spring arrangement method, the caliper floating type disc brake device 10 has been described with reference to FIG. However, since the return spring 70 does not protrude from the pressure plates 52, 62 of the brake pads 50, 60, the return spring arrangement method according to the present invention is also used for an opposed disc brake (not shown). Can do.

  In the above embodiment, the brake pads 50 and 60 are constituted by pressure plates 52 and 62 made of steel plates and the like, and linings 54 and 64 which are friction members attached to the pressure plates 52 and 62. explained. However, in carrying out the method of arranging the return spring 70 according to the present invention, the brake pads 50 and 60 have no influence on the effect even when the pressure plate equivalent part and the lining equivalent part are integrally formed by one member. It does not give.

  Next, another form of the return spring that can be used in the embodiment will be described. For example, as shown in FIG. 9, the return spring used in the embodiment is characterized in that a transition portion between the folded portion 72 and the arm portions 74 a and 74 b is inclined so that the folded portion 72 is raised. Can be mentioned.

  By adopting such a configuration, the intersection of the two return springs 70 can be intentionally made as a three-dimensional intersection. The arm portions 74a and 74b of the two return springs 70 do not overlap.

  Next, a second embodiment according to the return spring will be described with reference to FIG. As shown in FIG. 10, in the return spring 70 according to the present embodiment, both end portions of the folded portion 72 are shoulder-like, and the arm portions 74 a and 74 b extending from the end portions also gradually spread. The composition is taken. For this reason, compared with the return spring which concerns on 1st Embodiment, the form will approximate a V shape.

  As described above, the return spring 70 according to the present embodiment has the same effect as that of the above-described embodiment, that is, the pair of the folded portions 72, with the end portions of the turned-back portions 72 being shoulder-shaped and the arm portions 74a and 74b being gradually expanded. It is possible to prevent interference between the arm portions 74a and 74b of the return spring 70. In addition, because of such a shoulder-like shape, the opening of the arm portions 74a, 74b is narrowed by the reduction of the linings 54, 64 in the brake pads 50, 60, and accordingly, the folded portions are turned from the holding portions 76a, 76b. Even when the vertical distance R up to 72 is extended, the distance between the arm portions 74a and 74b is reduced overall, so that the side surfaces of the linings 54 and 64 are held by the holding portions 76a and 76b of the two return springs 70. There is little risk of weakening.

  Next, a third embodiment according to the return spring will be described with reference to FIG. As shown in FIG. 11, the return spring 70 according to the present embodiment has a configuration in which two arm portions (one arm portion 74 a and the other arm portion 74 b) extending from both ends of the folded portion 72 intersect each other. Take. As described above, the closed region 75 is formed on the folded portion 72 side by intersecting the arm portions 74a and 74b. The return spring 70 in this embodiment is formed by connecting the closed regions 75 in a chain shape.

  According to such a configuration, the connected state of the return spring 70 disposed opposite to the return spring according to the first and second embodiments is strengthened. Therefore, it is possible to improve the probability of preventing the situation where the return spring 70 is scattered and lost or dropped when the return spring 70 is removed.

  Next, a fourth embodiment according to the return spring will be described with reference to FIG. 12A is a plan view of a pair of return springs, and FIG. 12B is a side sectional view of the pair of return springs.

  As shown in FIG. 12, the return spring 70 according to the present embodiment is configured to connect two return springs 70 that are paired by a connecting member 77. In the case of such a configuration, there is no need to cross two return springs 70 to be connected, so that the mounting state is highly stable and the assembling property is high. It should be noted that the return springs 70 that form a pair when the method of arranging the return springs 70 according to the present invention is implemented may be joined by welding or the like.

  13A and 13B, the return spring used in the present invention depends on the width of the folded portion 72 even when the distance D between the holding portion 76a and the holding portion 76b is the same. The projecting angles θ of the arm portions 74a and 74b from the point O that is the base point of rotation (deflection) of the arm portions 74a and 74b are different. The overhang angle θ of the arm portions 74a and 74b decreases as the linings 54 and 64 in the brake pads 50 and 60 decrease.

  Here, in the return spring shown in FIG. 13 (A) and the return spring shown in FIG. 13 (B), when the distance l1 from the folded portion 72 to the holding portions 76a and 76b is equal, the overhang angle θ is If they are different, the lengths of the arm portions 74a and 74b are different.

  For this reason, when the overhang angle θ decreases as the linings 54 and 64 decrease (from new wear to full wear), even if the distance d decreases, the moving distance of the holding portions 76a and 76b is ΔR>. Differences such as Δr will occur. This difference in distance is related to the difference in clamping force between the side surfaces of the linings 54 and 64 by the return spring 70. Therefore, it is desirable that the return spring 70 has a wider width at the folded-back portion 72 to reduce a change in the moving distance of the holding portions 76a and 76b due to a change in the projecting angle θ of the arm portions 74a and 74b.

  10 ......... Disc brake device, 20 ......... Caliper, 22 ......... Cylinder part, 24 ......... Bridge part, 26 ......... Claw part, 28 ......... Piston, 30 ...... Arm part, 32 ... ...... Slide pin, 40 ......... Support, 50 ......... Inner brake pad (brake pad), 52 ......... Pressure plate, 54 ......... Lining, 60 ......... Outer brake pad (brake pad), 62 ......... Pressure plate, 64 ......... Line, 70 ......... Return spring, 72 ......... Folded part, 74a ......... One arm part (arm part), 74b ......... Other arm part (arm) Part), 76a, 76b ......... holding part, 80 ... rotor, 90 ... pad clip, 99 ... expansion prevention part (stopper).

Claims (5)

In order to separate a brake pad, which has a turn-back portion and an arm portion, and is disposed opposite to the disc brake device from the rotor, it is arranged in each of the turning-in direction and the turning-out direction of the rotor with respect to the brake pad. Return spring arrangement method,
The folded portions of the two return springs face each other, and the folded portions of the two return springs opposed to each other are connected to the brake pad, respectively.
A disposing method of a return spring for a disc brake device, wherein a tip of the arm portion of the two connected return springs can contact a side surface of a lining corresponding portion of the brake pad.   2. The method for arranging a return spring for a disc brake device according to claim 1, wherein the contact is made by sandwiching a side surface of the lining equivalent portion with a tip of the arm portion.   The method of arranging a return spring for a disc brake device according to claim 1 or 2, wherein the connection of the two return springs is made by crossing the folded portions in a chain shape. A tip of the arm portion is provided with a spread suppressing portion that suppresses the spread of the return spring to the pad clip in the disc brake device,
4. The return spring according to claim 1, wherein further expansion of the return spring is suppressed after the tip of the arm portion contacts the expansion suppression portion. 5. Arrangement method of return spring for disc brake device.   When the new brake pad is separated from the rotor by a predetermined distance or more, the spread suppressing part is provided at a position where the new brake pad is not separated from the rotor by the distance or more, and the expansion of the return spring is suppressed. 5. The method for arranging a return spring for a disc brake device according to claim 4, wherein the return spring is arranged.