JP2592100Y2 - Disc brake - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake used for braking a vehicle or the like.

[0002]

2. Description of the Related Art As shown in FIG. 6, a disc brake has a carrier 51 provided on a non-rotating portion of a vehicle, a pad guide 52 provided to face the carrier 51, and a disc 53 provided between the carriers. A pair of pads 54 slidably supported by the pad guide 52 and a pair of pads 54 slidably supported by the carrier 51 with the pads 5 interposed therebetween from the back surface 55 side.
The pad guide 52 includes a caliper 56 for bringing the pair 4 into contact with the disk 53 and a return spring 57 for urging the pair of pads 54 away from each other. As the pad guide 52, as shown in FIG. A lower plate portion 58 for supporting the lower surface of the end portion of the pad 54, and a pressing portion 5 for supporting the upper surface of the end portion of the pad 54 while pressing the upper surface toward the lower plate portion 58.
9 and an abutment plate portion 60 for connecting the pressing portion 59 and the lower plate portion 58 and having an abutting plate portion 60 with which the end surface of the pad 54 abuts. Then, both pads 54
The back metal 61 is provided with an engagement hole (not shown) in parallel with the back surface 55. The return spring 57 has an end portion engaged with the engagement hole of both pads 54, and is supported by a caliper. The pad 54 is separated from the disk 53 when the pressing of both pads 54 by the 56 is released.

[0003]

Since the disc brake is supported only by the pad 54 on which the return spring 57 slides as described above, the pad 54 of the return spring 57
There is a possibility that the return force for separating the two is biased. When the return force to the pad 54 is unbalanced, the amount of separation of one pad 54 from the disk 53 decreases, and the pad 54
Drag between the disk and the disk 53, which may cause uneven wear of the one pad 54.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a disc brake capable of preventing the return force from being biased to the pad by the return spring, and reliably preventing the pad from being dragged and unevenly worn.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the disk brake of the present invention is provided with a disk interposed therebetween.
A pair of pads provided to face each other in the disk axis direction
And both sides of the disc in the axial direction of the disc.
The pair of torque receiving portions formed on the outer peripheral side of the disk
And is attached to the non-rotating part of the vehicle.
Carrier and a pair of pads across the disc
Pads interposed between the carrier and the torque receiver
Guides that guide the slide in the disk axis direction
Opposing surfaces of both torque receiving parts of the carrier and the outer circumference of the disk
The mounting part engaging with the disk path part formed on the facing surface is shaped
The pad guide that has been formed, and the pad guide
Arranged between the rear disk path and the disk outer peripheral surface.
A support portion to be placed, and both sides of the support portion are pad guides.
Between the mounting part of the disk and the disk path opposing surface of the disk path
To engage the engaging portion of each tip with each pad
In addition, a pad is provided between each engagement portion and the support portion.
How to release each pad from the disk when moving to the disk side
A biasing portion for generating a biasing force in the opposite direction is formed .

[0006]

According to the disc brake of the present invention, the return is achieved.
The spring supports both torque receiving parts of the carrier.
The disk formed by the opposing surface of the
Attachment part and carrier of pad guide to engage with scoop part
Between the disk path of the disk
Therefore, the return force exerted on the pad engaged by the engagement portion by the biasing portions provided at both ends of the support portion is
The pad is almost evenly spread to both pads around the support portion. Therefore, the return force to the pad by the return spring is not biased. Moreover, the career
Formed on the opposing surfaces of both torque receiving parts and the disk outer peripheral surface
Mounting of the pad guide to be engaged with the disc path part to be formed
Part and the disk outer peripheral surface of the disk path part of the carrier
Between the return spring support
Therefore, when a force is transmitted to the pad guide via the return spring when the pad slides, deformation of the pad guide can be suppressed. Therefore, the influence of the deformation of the pad guide on pad sliding can be eliminated as compared with the case where the support portion of the return spring is engaged and supported on the easily deformable, eg, free end portion, of the pad guide.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A disc brake according to a first embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows the entire structure of the first embodiment. In FIG. 1, reference numeral 1 denotes a disc brake.
The disc brake 1 includes a carrier 2 fixed to a non-rotating portion of a vehicle, and a disc 3 sandwiched between the carrier 2 and the carrier 2.
With a pair of packs provided facing each other in the disk axis direction.
Pin 4 and two sliding guides 5 of the carrier 2
(Not shown in FIG. 1), and is mainly constituted by a caliper 7 supported so as to be slidable in the axial direction of the disk 3 by fitting. Here, both pads 4 are supported so as to be slidable in a direction along the axis of the disk 3 by a pair of pad guides 8 provided inside the sliding guide portion 5 of the carrier 2 so as to face each other. I have.

When the brake pedal is depressed, the disc brake 1 is provided on one side via a bridge 9 of the caliper 7 and on the other side to face the piston (not shown). A claw portion (reaction portion) 10 sandwiches both pads 4 from the back surface (surface on the side opposite to the disk 3) 11 via the disk 3, and presses these to slide in the direction of the disk 3. As a result, the pads 4 and the disk 3 come into contact with each other to generate friction therebetween, thereby weakening the rotation of the wheels and braking the vehicle.

Next, with reference to FIGS. 2 to 4, a main part of the first embodiment according to the present invention will be described. 2 shows only one side of the left-right symmetric one, and FIG. 3 shows only the upper half of one side of the left-right symmetric one.

The pad 4 is composed of a lining 12 which comes into contact with the disk 3 and generates a frictional force, and a backing plate 13 which supports the pad 4 on the carrier 2. As shown in FIG. Is composed of a base portion 14 to which the lining 12 is fixed, and sliding support portions 15 provided at both ends thereof and supported by the carrier 2 via pad guides 8. The sliding support portion 15 is formed with a side surface portion 16 extending in the vertical direction in FIG. 2, and an upper surface portion 17 and a lower surface portion 18 orthogonal to the side surface portion 16. In the upper part of FIG. 2 near the boundary between the sliding support part 15 and the base part 14, an engagement hole 19 penetrating in the thickness direction of the back metal 13 is provided.
Are formed by press molding.

The carrier 2 is provided on the side surface 16 of the pad 4.
A pair of substrate portions 22 having a torque receiving portion 20 provided along the shaft and a connecting portion 21 for connecting the lower ends of the torque receiving portions 20 to each other,
A pair of torque receivers located on both sides in the axial direction
The upper part of the part 20 in FIG.
The connection is made by straddling, and the pin 6 of the caliper 7 is
And the slide guide portion 5 provided with a guide hole 23 along which the guide hole 23 is slidably fitted. On the pad 4 side of the torque receiving portion 20, a contact surface portion 24 extending along the side surface portion 16 of the pad 4 and a step portion 25 extending along the lower surface portion 18 of the pad 4 are formed. On the pad 4 side of the sliding guide portion 5, a flat portion 26 formed to be flush with the contact surface portion 24 is provided. Further, in the sliding guide portion 5, the lower side in FIG. 2, the outer disk 3
Inclined portion facing the peripheral surface (disc outer peripheral surface, disk
Path portion) 27 and the outer peripheral surface of the disk 3
Notch cut away the boundary portion between the inclined portion 27 and the flat portion 26 in an arc shape (disk facing the outer peripheral surface, the disk path
) 28 are formed.

The pad guide 8 for slidably supporting the pad 4 is provided on the torque receiving section 20 of the carrier 2 and the pad 4 side of the sliding guide section 5. The pad guide 8 includes a lower plate 29 along the step 25 of the carrier 2,
The lower plate portion 29 is connected to the side opposite to the pad 4 and a contact plate portion (guide portion) 30 along the contact surface portion 24 and the flat surface portion 26 of the carrier 2, and upward from the upper end of the contact plate portion 30. A pressing portion 31 that is bent toward the pad 4 and extends further downward after extending, and the pressing portion 31 and the lower plate portion 29 are in contact with the contacting plate portion 30. 4
Is supported while being pressed from above and below. Here, the contact plate portion 30 is a contact plate shown in FIG.
The disk 3 is provided at two places in the same manner as the plate 60.
Between the pair of pads 4 and the torque receiving portions 20 of the carrier 2
And the pad 4 is interposed between the
Slide guide. Also, this is between the contact plate portion 30 of the pad guide 8 extends so as to form approximately the same angle as the inclined portion 27 of the carrier 2 from a predetermined position in the anti-pad four directions, carry
Mounting portion 32 abuts against the inclined portion 27 of A 2 is provided, the mounting portion 32, on the torque receiving portion 20 side, both Torr
Face portions of the receiving portion 20 (opposite faces, disk
Pass portion) 33 (see FIG. 3) to contact the pad guide 8
Has a contact piece 34 for positioning. That is,
The pad guide 8 is configured such that the mounting portion 32 is
It is engaged with the surface portion 33 and is fixed to the carrier 2. The pad guide 8 penetrates in a thickness direction at a predetermined position near the boundary with the surface portion 33 and near the boundary with the attachment portion 32 in a state where the pad guide 8 is mounted on the carrier 2. A through hole 35 or a groove is provided.
With the above configuration of the pad guide 8, a space 36 communicating with the through hole 35 is formed between the mounting portion 32, the contact plate portion 30, and the cutout portion 28 of the carrier 2.
The radius of the inscribed circle of the space 36 is substantially equal to the diameter of a return spring 37 described later.

A return spring 37 is provided between the pads 4 to separate them from the disk 3 when the brake is released. The return spring 37 is formed of a linear member as shown in FIG. 4 and the like.
The biasing portions 39 that generate the main biasing force extend from both ends of the support member 38 at a predetermined angle with respect to the support portion 38.
And an engaging portion 40 at the tip of each of the urging portions 39 extending outward from the side opposite to the support portion 38 in parallel with the support portion 38. The middle portion is curved in an arc shape. The return spring 37 is mounted on the pad guide 8 in a state where the vicinity of the support portion 38 of both biasing portions 39 is inserted into the through hole 35 of the pad guide 8 (see FIG. 3). . When the pad guide 8 with the return spring 37 mounted thereon is mounted on the carrier 2, the return spring 37
The vicinity of the support portion 38 of the both urging portions 39 abuts on the surface portion 33 so that the movement in the axial direction is restricted and the support portion 38 is located in the space 36 between the carrier 2 and the pad guide 8. In this state, the engaging hole 19 of the pad 4 is inserted from the outside into the engaging portion 40 to engage with the pad 4. The support portion 38 of the return spring 37 includes an attachment portion 32 for fixing the pad guide 8 to the carrier 2,
And the support portion
The engaging portions 40 on both sides of the pad guide 38 are attached to the mounting portions 3 of the pad guide 8.
2 extends from between the notch 2 and the notch 28 to engage with each pad 4
And the engagement portions 40 and the support portions 38
Between the urging portions 39, the pad 4 has moved to the disk 3 side.
At this time, a biasing force in the direction of separating each pad 4 from the disk 3 is generated.
Will be alive.

According to the disk brake 1 of the first embodiment having the above-described structure, the return spring 37 is engaged and supported between the pad guide 8 and the carrier 2 at the support portion 38 thereof. Since the movement is restricted in this support state, the return force exerted by the urging portions 39 provided at both ends of the support portion 38 on the pad 4 engaged with the engagement portion 40 is limited by the support portion. Both pads 4 are almost evenly distributed around the pad 38 without any bias. Therefore, when the pressing force on the pad 4 by the caliper 7 is released, both pads 4 are surely separated from the disk 3 by the uniform urging force of the return spring 37, so that the pad 4 is dragged and uneven wear is caused. It can be reliably prevented.

An engagement hole 19 formed in the back metal 13 of the pad 4 for engaging the return spring 37 is provided.
Since the engagement hole 19 can be easily formed by press molding because it penetrates along the thickness direction of the back metal 13, the engagement hole 19 is provided in parallel with the back surface 11 of the back metal 13. As a result, the production becomes easier and the production cost can be reduced.

In addition, since the respective urging portions 39 basically apply the respective urging forces to the pad 4 centering on the support portion 38, the urging forces of the respective urging portions 39 are individually set. It is possible to do.

Furthermore, since the return spring 37 is engaged and supported by using the carrier 2 and the pad guide 8, the number of parts does not increase.

Next, a second embodiment of the present invention will be described. In the second embodiment, a notch 28 is provided in the sliding guide portion 5 of the carrier 2 so that the space 3 for engagement with the return spring is provided.
In contrast to the first embodiment in which the carrier 6 is provided, as shown in FIG. 5, the inclined portion 2 of the carrier 2 which is not provided with the notch portion is provided near the contact plate portion 30 of the mounting portion 32 of the pad guide 8.
7 and a curved portion 4 which is curved so as to form a space portion 36 therebetween.
1 (the other parts are the same as in the first embodiment, and therefore are denoted by the same reference numerals and description thereof is omitted). Therefore, in the second embodiment, not only the effects described in the first embodiment but also the notch portion need not be provided in the carrier 2, so that the manufacturing cost can be further reduced. .

The engaging hole 19 of the pad 4 described in the first and second embodiments penetrates the back metal 13 as long as the engaging portion 40 of the return spring 37 is engaged. For example, it is possible to form a recess recessed one step from the engagement side of the return spring 37, or to form a groove from the outer periphery of the sliding support portion 15 to the inner engagement position. is there.

[0021]

As described in detail above, according to the disc brake of the present invention, the return spring is supported by its support portion.
Are the opposing surfaces of the two torque receiving parts of the carrier and the disk.
A disk engaging with the disk path formed by the outer peripheral facing surface
Between the mounting part of the guide and the disk path of the carrier.
To be placed between the outer periphery facing surface
Has the effect of The return force exerted on the pad engaged by the engaging portion by the urging portions provided at both ends of the support portion is almost equally applied to both pads centering on the support portion. There is no bias in the return force to the head. Therefore, when the pressing force on the pad by the caliper is released, both pads are surely separated from the disk by the uniform biasing force of the return spring, so that dragging and uneven wear can be reliably prevented. Since the support portion of the return spring is engaged and supported at the portion where the pad guide is fixed to the carrier, the deformation of the pad guide when force is transmitted to the pad guide via the return spring during pad sliding. Can be suppressed. Therefore, the influence on the pad sliding due to the deformation of the pad guide can be eliminated as compared with the case where the support portion of the return spring is engaged and supported on the easily deformable, for example, free end portion of the pad guide.

[Brief description of the drawings]

FIG. 1 is a plan view showing an entire configuration of a disc brake according to a first embodiment of the present invention.

FIG. 2 is a front sectional view showing a carrier, a pad guide, a pad, a return spring and the like of the disc brake according to the first embodiment of the present invention;

FIG. 3 is a cross-sectional view of the disc brake according to the first embodiment of the present invention taken along line XX of FIG. 2 showing a carrier, a pad guide, a pad, and a return spring.

FIG. 4 is a perspective view showing a return spring of the disc brake according to the first embodiment of the present invention;

FIG. 5 is a front sectional view showing a carrier, a pad guide, a pad, a return spring, and the like of a disc brake according to a second embodiment of the present invention.

FIG. 6 is a plan view showing a conventional disc brake.

FIG. 7 is a perspective view showing a pad guide of a conventional disc brake.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc brake 2 Carrier 3 Disc 4 Pad 7 Caliper 8 Pad guide 11 Back 37 Return spring 38 Supporting part 39 Energizing part 40 Engaging part

Claims (1)

(57) [Scope of request for utility model registration] (1) A disc is sandwiched in the axial direction of a disc across the disc.
A pair of pads provided facing each other, and a pair of pads on both sides of the disk
The formed pair of torque receiving parts is straddled over the outer circumference of the disk.
And connected to the non-rotating part of the vehicle.
Carrier , a pair of pads and a carrier torque receiver
And interpose the pad in the disk axis direction
Guide part for sliding guidance and both torque receiving parts of carrier
The disk formed by the opposing surface of the
Pad guide formed with a mounting portion to be engaged with the scoop portion
And the pad guide mounting part and carrier disk path part
A support portion disposed between the disk outer peripheral facing surface;
Both sides of the support section are the pad guide mounting section and the disc path section
Of the end of each disk
The engaging portion is engaged with each pad, and each engaging portion is
When the pad moves to the disc side,
A pad that generates a biasing force in the direction that separates the pad from the disc
A disc brake characterized by forming a force part .