JP4820383B2 - Disc brake device pad clip and disc brake device - Google Patents

Description

  The present invention relates to a pad clip for a disc brake device and a disc brake device, and more particularly to a pad clip suitable for a caliper floating type disc brake device.

  In the disc brake device, a pad clip is used as a guide for sliding the brake pad for generating a frictional force with the rotor in the axial direction of the rotor and a holding means for stably holding the brake pad. It is common to arrange.

  In the caliper floating type disc brake device, in particular, the pad clip 3 is fixed to the support 1 by sandwiching the convex portion 2 formed on the support 1 with the U-shaped portion 4 formed on the pad clip 3 as shown in FIG. The structure is taken (patent document 1). However, in the configuration in which the convex portion 2 is simply sandwiched by the U-shaped portion 4, there is a displacement (disengagement) between the U-shaped portion 4 and the convex portion 2 when the brake pad is mounted or due to aged use. This may cause the brake pad restraining force to decrease. If such a phenomenon occurs, it may cause rattling noise, cronk noise, judder noise and other noise (brake noise), such as rattling of the brake pads to be held, and braking due to uneven wear of the lining on the brake pads It will also lead to performance degradation.

Therefore, as a structure for stably holding the pad clip 3 on the convex portion 2, as shown in FIG. 10, as shown in FIG. A support in which a groove is provided on the upper surface of a convex portion has been proposed. And the pad clip 3 attached to the support of such a structure has the shape corresponding to these supports, and has a hook with respect to the level | step difference 5 and groove | channel which were mentioned above.
JP 2005-315423 A JP-T-2006-510860

  By adopting the support structure having the above-described configuration, the effect of preventing the clip of the pad clip is certainly higher than that in the fixed state as disclosed in Patent Document 1, and the restraining force of the brake pad is stabilized. It is thought that it can be made.

  However, there is no change in that all of the pad clip fixing means rely only on the pinching of the convex portion. For this reason, an error at the time of forming the U-shaped portion and a deterioration of the clamping force due to deterioration over time cannot be denied. In addition, the retaining structure as disclosed in Patent Document 2 and the like needs to be subjected to groove processing or step processing for the support, and therefore processing on the support side requires at least two stages of processing. . Specifically, shape formation by milling from the direction of arrow A in FIG. 10, processing from another direction for forming grooves and stepped portions, or processing by another processing means.

  For this reason, since the pad clip having the above structure has only one fixing means, there is usually a problem that high adhesion to the support cannot be obtained. And in order to solve these problems and obtain a retaining effect on the support, it is necessary to process the support on the mounting side, resulting in a decrease in productivity and an increase in production cost due to an increase in processing steps and processing means. There will be concerns that it will be a factor.

  Therefore, the present invention provides a disc brake device pad clip and a disc brake device that can exhibit a high retaining effect even with respect to a support that can be formed by conventional processing steps and processing means. Objective.

  In order to achieve the above object, a disc brake pad clip according to the present invention is provided in a torque receiving portion with which a brake pad arranged in a disc brake device abuts, and the brake pad is slidable in the axial direction of a rotor. A holding pad clip, comprising: a sandwiching portion that sandwiches a convex portion formed in the torque receiving portion; and an expanding portion that is widened and supported by a concave portion formed in the torque receiving portion. One of the sides constituting the part and the spread part is shared.

  Further, in the pad clip for a disc brake device having the above-described characteristics, the sandwiching portion and the widening portion are formed by bending one flat plate, and among the sides constituting the widening portion, The side facing the side shared with the clamping part may be a spring piece configured by bending a part of the plate piece extending from the clamping part in a direction different from the extending direction of the plate piece.

In order to achieve the above object, a disc brake device according to the present invention includes a first recess for supporting a pad clip and a second support for supporting a brake pad at a torque receiving portion of a support constituting the disc brake device. A concave portion and a convex portion positioned between the first concave portion and the second concave portion and sandwiched by the pad clip, the sandwiching portion sandwiching the convex portion, and the first concave portion An expansion portion supported to be expanded, and the sandwiching portion and the expansion portion are formed by bending one flat plate, and one of sides constituting the sandwiching portion and the expansion portion Among the sides constituting the expanding portion, the side facing the side shared with the clamping portion is a part of the plate piece extending from the clamping portion. A spring piece formed by bending in a direction different from the direction Comprising a pad clip, characterized in that the first wall portion constituting the convex portion is configured to be shared with the first wall portion constituting the first recess.

  Further, in the disc brake device having the above-described features, a step portion, an inclined portion, a wall portion at a position facing the wall portion constituting the convex portion among the wall portions constituting the first concave portion, Any one of the grooves may be provided.

  According to the disc brake pad clip and the disc brake device having the above characteristics, there is no step or groove in order to stabilize the mounting state of the pad clip by two fixing means such as the clamping portion and the expanding portion. In addition, the retaining effect for the torque receiving portion can be improved. For this reason, the holding state of the brake pad, that is, the restraining force is stabilized, and brake noise such as rattle noise and clonk noise can be suppressed. Further, since there is no need for processing such as a groove or a step on the mounting surface of the torque receiving portion, it is possible to suppress an increase in processing steps and an increase in processing cost as the entire disc brake device. Furthermore, by sharing one of the sides constituting the sandwiching portion and the expanding portion, the configuration of the pad clip is simplified, and the plate take-up property is improved. In addition, by sharing one of the sides constituting the expanding portion and the sandwiching portion, the forces of both the expanding portion and the sandwiching portion interact with each other, and the expanding force and the sandwiching force are improved. It is possible to improve the retaining effect on the torque receiving portion. In addition, when a groove | channel or a level | step difference is provided in the attachment surface in a torque receiving part like the prior art, the stabilization of the attachment state of a still higher pad clip can be aimed at.

  Further, the sandwiching portion and the expanding portion of the pad clip are formed by bending one flat plate, and among the sides constituting the expanding portion, the sides facing the sides shared with the sandwiching portion are separated from the sandwiching portion. According to the spring piece formed by bending a part of the extended plate piece in a direction different from the extending direction of the plate piece, the shape and processing steps of the pad clip itself are hardly changed from the conventional one. In addition, it is possible to provide a pad clip that makes it possible to stabilize the attached state. Therefore, it is possible to stabilize the mounting state with respect to the torque receiving portion and stabilize the pad restraining force without increasing the processing cost, the material cost, and the like as compared with the conventional case.

  Moreover, by providing any one of a step part, an inclined part, and a groove on the wall part at a position facing the wall part constituting the convex part among the wall parts constituting the first concave part, It becomes possible to further enhance the retaining effect of the pad clip.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a disc brake pad clip and a disc brake device of the present invention will be described in detail with reference to the drawings.
First, the configuration of the entire disc brake device will be described with reference to FIG. A disc brake device 100 shown in FIG. 2 is a so-called caliper floating type disc brake device, and is configured based on a support 10, a caliper 20, a brake pad 30, and a pad clip 40.

  The support 10 is a base that supports a caliper 20 and a brake pad 30, which will be described in detail later. As shown in FIG. 3, the support 10 straddles at least the rotor 60 and is provided with a torque receiving portion 12 disposed on each of the turning-in side and the turning-out side of the rotor 60, and the torque receiving portion 12 is fixed to a support member not shown. And a mounting hole 16 for the purpose. A guide hole 14 for interposing a guide pin (not shown) for fixing and sliding the caliper 20 in the support bridge portion 18 that connects the torque receiving portions 12 arranged on the inner side and the outer side of the rotor 60. Is provided. In FIG. 3, FIG. 3 (A) is a diagram showing a front configuration of the support with the brake pad attached, and FIG. 3 (B) is a perspective view thereof.

  The support 10 to which the pad clip 40 according to the present embodiment is attached has a first recess 12a, a second recess 12c, and a protrusion 12b in the torque receiving portion 12. Both the first concave portion 12a and the second concave portion 12c have the same opening direction, and one side constituting the concave portion forms the convex portion 12b (wall portion β, wall portion γ (see FIG. 4)). Is included. And the 1st recessed part 12a plays the role of the support part for stabilizing the attachment state of the pad clip 40 mentioned later for details, and the 2nd recessed part 12c is a support part for supporting the brake pad 30 mentioned later for details. Play the role of In addition, the convex part 12b plays the role of the support part for stabilizing the attachment state of the pad clip 40 similarly to the said 1st recessed part 12a.

  As shown in FIG. 4, such processing of the torque receiving portion 12 is performed by milling from the direction of the arrow A, and the end mill used has a cutting blade whose rotational axis is larger than its rotational axis, and the horizontal direction It is possible to use a type (for example, a tip-type end mill) that can perform only the above cutting. For this reason, formation of the above-mentioned 1st crevice 12a, 2nd crevice 12c, and convex part 12b can be collectively performed in one processing process. Therefore, it is not necessary to perform broaching from the front side in FIG. 4 in order to form a groove or a step in the wall portion β corresponding to the upper side of the convex portion 12b, thereby reducing the support processing time and processing cost, and improving productivity. Can be improved. In addition, an unstable portion such as a stepped portion is formed on the sandwiching surface (wall portion β or wall portion γ) of the convex portion 12b, which is an important portion where the pad clip 40 is supported by the torque receiving portion 12, as described above. Without forming, it contributes to enhancing the effect of preventing the pad clip 40 from shifting.

  The caliper 20 has at least a cylinder part 22, a claw part (not shown), a caliper bridge part 24, and an arm part 26. The cylinder portion 22 and the claw portion are disposed so as to face each other with the rotor 60 interposed therebetween, and are connected by the caliper bridge portion 24. The arm portion 26 is connected to the cylinder portion 22, and an attachment hole (not shown) is formed at the tip thereof. By inserting the guide pin 28 into the mounting hole and intervening in the guide hole 14, the caliper 20 is supported so as to be slidable in the axial direction of the rotor 60 with respect to the support 10.

  The cylinder part 22 is provided with a piston (not shown), and when the hydraulic fluid (hydraulic oil) flows into the cylinder part 22, the piston projects in the arrangement direction of the claw part.

  The brake pad 30 includes a pressure plate 32 made of metal and a lining 36 that generates a frictional force with the rotor 60. The brake pads 30 are arranged on the inner side and the outer side of the rotor 60 with the lining 36 facing each other, and between the torque receiving portions 12 provided on the turn-in side and the turn-out side of the rotor 60, respectively. Prepared for. The pressure plate 32 is provided with a convex portion called an ear portion 34, and the ear portion 34 is held by a pad clip 40, which will be described in detail later.

  The configuration of the pad clip 40 according to the first embodiment will be described in detail with reference to FIGS. 1 and 5. First, referring to FIGS. 5A and 5B, the pad clip 40 according to the present embodiment is basically composed of a base part 42 and a leg part 44, and the leg part 44 has a feature. Here, in FIG. 5, FIG. 5 (A) is a perspective view showing the configuration of the pad clip, and FIG. 5 (B) is a view showing the right side surface in FIG. 5 (A). Moreover, FIG. 1 is a figure which shows the attachment state of the pad clip with respect to a torque receiving part.

  When the base 42 is attached to the torque receiving portion 12 of the support 10, the base 42 has a role of straddling the rotor 60 and connecting the leg portions 44 disposed on the inner side and the outer side of the rotor 60. The leg portion 44 includes a U-shaped portion 48, a first support piece 50, and a second support piece 52, supports the ear portion 34 of the brake pad 30, and the brake pad 30 is a rotor 60. It plays a role to support sliding in the axial direction.

  The U-shaped portion 48 is a portion formed to be bent in a U-shaped cross section. The U-shaped portion 48 sandwiches the wall portion β and the wall portion γ constituting the convex portion 12b formed in the torque receiving portion, and Plays the role of stabilizing the mounting state. Further, the pad clip 40 of the present embodiment is configured between a connecting side 46 that connects the end of the upper side 48 a of the U-shaped part 48 and the base 42, and the upper side 48 a of the U-shaped part 48. The inclination angle of the connecting side 46 is set so that the angle θ falls within an acute angle range. The connecting side 46 is provided with a spring piece 46a in which a fixed end 46a1 is disposed on the base 42 side and a free end 46a2 is disposed on the U-shaped portion 48 side. The free end 46a2 of the spring piece 46a is bent so that the horizontal position is located above the bent portion 46a3 located on the fixed end 46a1 side.

  As shown in FIG. 1, the pad clip 40 formed as described above has the free end 46a2 of the spring piece 46a in contact with the wall portion α of the first concave portion 12a, as shown in FIG. A stretching force, that is, an urging force in the expanding direction, is generated between the upper side 48a and the wall surface β in contact with the wall surface β, and the pad clip 40 is expanded and supported. Here, the angle θ formed by the upper side 48a and the connecting side 46 is set to an acute angle range, so that the spring piece 46a, the upper side 48a, and the connecting side 46 are substantially Z-shaped (in the illustrated case, reverse Z). Will be made. This makes it possible to press the wall portion (wall portion α and wall portion β) where the spring piece 46a and the upper side 48a face each other without providing the first recess 12a extremely deeply, and works in the expanding direction. The power will be demonstrated effectively.

  Thus, the pad clip 40 according to the present embodiment is sandwiched by the U-shaped portion 48 with respect to the torque receiving portion 12 of the support 10, and the upper side 48a of the U-shaped portion 48 and the free end 46a2 of the spring piece 46a. Since the fixing is achieved by two actions of the two fixing means such as the tension, the attachment state can be stabilized as compared with the conventional case.

  The first support piece 50 is a smooth plate extending below the end portion of the lower side 48b of the U-shaped portion 48 described above and along the wall portion δ against which the brake pad 30 abuts during braking.

  The second support piece 52 is a support plate that extends from the lower end of the first support piece 50 in the direction in which the brake pad 30 is disposed. The second support piece 52 supports the ear part 34 of the brake pad 30 with the lower side 48 b of the U-shaped part 48 and the second support piece 52 sandwiched therebetween.

  According to the pad clip 40 having the above-described configuration, first, as described above, the support is provided by using two actions such as clamping by the U-shaped portion 48 and expansion support (stretching) using the spring piece 46a. Therefore, even if no groove or step is provided in the wall portion β constituting the convex portion 12b, it is possible to obtain sufficient resistance to displacement and dropout. it can. And since there is no gap in the mounting state of the pad clip 40, the restraining force for holding the brake pad 30 can be stabilized as compared with the conventional case, and the effect that the brake noise can be reduced can be obtained. You can also.

  In addition, by sharing a part of the side that forms the U-shaped portion (clamping portion) 48 and the widened portion, the configuration of the pad clip 40 can be simplified, and the plate-capability from a flat plate material can be simplified. Will not be lowered. In addition, the fact that the spring piece 46a is a cut piece from the connecting side 46 also works favorably for maintaining good plate cutting performance.

  In the disc brake device 100 in which the pad clip 40 having the above-described configuration can be attached, when hydraulic oil is introduced into the cylinder portion 22, a piston (not shown) projects and the brake pad 30 disposed on the inner side of the rotor 60. The pressure plate 32 is pressed. The brake pad 30 whose pressure plate 32 is pressed by the piston slides in the axial direction of the rotor 60 along the supported pad clip 40, and makes the lining surface contact the inner surface of the rotor 60.

  When the inner brake pad 30 comes into contact with the rotor 60, the caliper 20 that receives the reaction of the projecting output of the cylinder portion 22 slides in the direction of extracting the guide pin 28 from the guide hole 14. By the operation of the caliper 20, the claw portion comes into contact with the pressure plate 32 in the brake pad 30 disposed on the outer side of the rotor 60, and the outer side brake pad 30 is pulled toward the rotor 60 side in accordance with the slide of the caliper 20. Become. Then, the brake pad 30 drawn toward the rotor 60 via the claw portion brings its lining surface into contact with the outer surface of the rotor 60. As a result, the rotor 60 is sandwiched by the brake pad 30 from both the inner side and the outer side.

  When the lining 36 of the brake pad 30 comes into contact with the rotor 60, a frictional force is generated between the rotor 60 and the lining 36, and a force acts on the brake pad 30 in a direction that rotates in the rotational direction of the rotor 60. At this time, a braking force can be applied to the vehicle by absorbing the force in the rotating direction acting on the brake pad 30 by the torque receiving portion 12 (wall portion δ) of the support 10 that is the support portion. .

  The operation of the disc brake device 100 is an example of the case where the cylinder portion 22 in the caliper 20 is disposed on the inner side of the rotor 60. Therefore, if the cylinder portion 22 in the caliper 20 is disposed on the outer side of the rotor 60, expressions such as the inner side and the outer side of the rotor 60 are reversed.

  According to the disc brake device 100 having the above-described configuration, the upper surface (wall portion β) of the convex portion 12b of the torque receiving portion 12 needs to be processed by another direction / other means such as providing a groove or a step. Instead, the attachment state of the pad clip 40 can be stabilized by the configuration of the pad clip 40 itself. For this reason, it is possible to reduce the processing cost of the support 10 and simplify the processing process, and to reduce the manufacturing cost and the processing process of the disc brake device 100 itself. In the above embodiment, the first support piece 50 is described as a smooth plate. However, the first support piece 50 is not necessarily a smooth plate. For example, a convex warp may be provided in the direction in which the brake pad 30 is disposed.

  According to the pad clip 40 having the above-described configuration, the mounting state can be more reliably stabilized by forming the stepped portion or the like as shown in the related art on the support 10. One specific example is the example shown in FIG. The example shown in FIG. 6 requires at least two processes for processing the torque receiving portion 12. For example, when both the first process and the second process are performed by milling, the first milling process is performed. In the processing step, the first concave portion 12a, the second concave portion 12c, and the convex portion 12b are formed (refer to FIG. 4 for the forming step). Next, in the second milling process, the first recess 12a is used by using an end mill having a smaller size than that of the first milling process while the rotation shaft is disposed in the direction orthogonal to the first milling process. Steps and grooves (steps in the example shown in FIG. 6) are formed on the upper side (wall portion α).

  By performing such processing on the torque receiving portion 12, the spring piece 46 a in the pad clip 40 is hooked on the stepped portion, and the effect of preventing the pad clip 40 from coming off can be further enhanced. Even when the second milling process is broaching, similar processing can be performed.

  In FIG. 6, the stepped portion and the groove are arranged so as to be orthogonal to the first concave portion, but the processing for the first concave portion may be an inclined portion as shown in FIG. 7. When such processing is performed on the first recess 12a, the processing may be performed on the wall portion α in a state where the rotation axis of the milling cutter is inclined by θ1 from the vertical position. Even when the torque receiving portion 12 has such a configuration, there is no difference in improving the retaining effect.

  Next, a second embodiment according to the pad clip of the present invention will be described with reference to FIG. Most configurations of the pad clip according to the present embodiment are the same as those of the pad clip according to the first embodiment described above. Therefore, parts having the same function are denoted by reference numerals added with 100 in the drawings, and detailed description thereof is omitted.

  The difference between the pad clip 140 according to the present embodiment and the pad clip 40 according to the first embodiment is the arrangement of the spring pieces 146a. Specifically, in the pad clip 40 according to the first embodiment, the fixed end 46a1 of the spring piece 46a is the upper side (base 42 side) of the connecting piece 46 in the pad clip 46, and the free end 46a2 is the lower side of the pad clip 46. (The U-shaped portion 48 side). In contrast, in the pad clip 140 according to this embodiment, the fixed end 146a of the spring piece 146a is the U-shaped portion 148 side, and the free end 146a2 is the base 142 side.

  Then, the spring piece 146a is warped so that the main surface which is the same as the main surface on the side supporting the brake pad faces the wall portion α, and the free end 146a2 is brought into contact with the wall portion α so that the pad clip 142 To support the expansion of

Even with the pad clip 140 having such a configuration, the same effect as that of the pad clip 40 according to the first embodiment can be obtained.
In the above embodiment, the caliper floating type is described as an example of the disc brake device to which the pad clip 40 is attached, but the configuration of the pad clip 40 according to the present invention is a disc brake device according to another configuration. Even if it is attached to the case, it can be adopted.

It is a figure which shows the attachment state of the pad clip with respect to a torque receiving part. It is a front view which shows the structure of a disc brake device. It is a figure showing composition of a disc brake device in the state where a caliper was removed. It is a figure which shows the example of the processing state of a support. It is a figure which shows the structure of the pad clip which concerns on 1st Embodiment. It is a figure which shows the example which performs a level | step difference process with respect to the 1st recessed part in a support. It is a figure which shows the example which performs an inclination process with respect to the 1st recessed part in a support. It is a figure which shows the structure of the pad clip which concerns on 2nd Embodiment. It is a figure which shows the relationship between the conventional pad clip and a support. It is a figure which shows the relationship between the conventional pad clip and the support with the structure for having a retaining effect.

Explanation of symbols

  10 ......... Support, 12 ......... Torque receiving portion, 12a ......... First recess, 12b ......... Projection, 12c ......... Second recess, 14 ......... Guide hole, 16 ......... Mounting hole, 18 ......... Support bridge, 20 ......... Caliper, 22 ......... Cylinder, 24 ......... Caliper bridge, 26 ......... Arm, 28 ......... Guide pin, 30 ......... Brake pads, 32 ... Pressure plate, 34 ... Ears, 36 ... Lining, 40 ... Pad clips, 42 ... Base, 44 ... Legs, 46 ... Connection side, 46a ......... Spring piece, 48 ......... U-shaped portion, 50 ......... first support piece, 52 ......... second support piece, 60 ......... rotor, 100 ......... disc brake device.

Claims (3)

A pad clip that is provided in a torque receiving portion with which a brake pad disposed in a disc brake device abuts, and the brake pad is slidably held in the axial direction of the rotor,
A clamping part for clamping a convex part formed in the torque receiving part;
An expansion portion that is expanded and supported in a recess formed in the torque receiving portion,
The sandwiching part and the expanding part are formed by bending one flat plate,
Sharing one of the sides constituting the sandwiching portion and the expanding portion ;
Of the sides constituting the expanding portion, the side facing the side shared with the clamping unit is a direction in which a part of the plate piece extending from the clamping unit is different from the extending direction of the plate piece A pad clip for a disc brake device, characterized in that a spring piece is formed by bending it into two . The torque receiving portion of the support constituting the disc brake device has a first recess for supporting the pad clip, a second recess for supporting the brake pad, and a position between the first recess and the second recess. And a convex portion sandwiched by the pad clip,
And having a sandwiching part that sandwiches the convex part and an expanding part that is expanded and supported by the first recess, and the sandwiching part and the expanding part are formed by bending one flat plate. One of the sides constituting the sandwiching portion and the widening portion is shared, and the side facing the side shared with the sandwiching portion among the sides constituting the widening portion is from the sandwiching portion. A pad clip comprising a spring piece configured by bending a part of the extended plate piece in a direction different from the extending direction of the plate piece ,
A disc brake device characterized in that one wall portion constituting the convex portion is shared with one wall portion constituting the first concave portion. Among the wall portions constituting the first concave portion, the wall portion at a position facing the wall portion constituting the convex portion is provided with any one of a stepped portion, an inclined portion, and a groove. The disc brake device according to claim 2 .

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