JP3936445B2 - Disc brake mounting member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disc brake mounting member that is preferably used to apply a braking force to, for example, a vehicle.
[0002]
[Prior art]
Generally, a disc brake used in a vehicle or the like is provided with a mounting member having a pair of arm portions that are separated in the circumferential direction of the disc and extend in the axial direction so as to straddle the outer periphery of the disc, and each arm portion of the mounting member. A caliper that is slidably supported and straddles both sides of the disk between the arms, and an inner side that presses both sides of the disk by a piston that is slidably inserted into a cylinder of the caliper And an outer side friction pad.
[0003]
Therefore, this type of conventional disc brake will be described with reference to FIGS.
[0004]
In the figure, reference numeral 1 denotes a disk that rotates together with a vehicle wheel, 2 denotes a mounting bracket as a disk brake mounting member, and the mounting bracket 2 is integrally formed as shown in FIGS. The main beam 3, each arm portion 5, and the reinforcing beam 7 described later are configured as a substantially rectangular frame.
[0005]
Reference numeral 3 denotes a main beam constituting the main body of the mounting bracket 2. The main beam 3 is formed as a plate-like body extending in the circumferential direction of the disk 1, and each arm portion 5 is integrally formed at both ends in the length direction. Has been. The main beam 3 is integrally attached to a non-rotating portion (not shown) of the vehicle at an inner side position on one side in the axial direction of the disk 1 via each mounting portion 4 described later.
[0006]
Here, as shown in FIG. 9, the main beam 3 is disposed at a position closer to the disk 1 by a dimension L1 than a base end face 5B of each arm 5 described later, and each disk path described later. It is substantially adjacent to the part 5A.
[0007]
4 and 4 indicate a pair of attachment portions provided on both sides in the longitudinal direction of the main beam 3, and each attachment portion 4 has a substantially circular outer periphery as shown in FIG. Screw holes 4A and 4A are formed in the center. And each attachment part 4 is integrally attached with a volt | bolt (not shown) etc. in the state which the surface contact | abutted to the non-rotation part of the vehicle. Here, each attachment portion 4 is set such that the distance L2 between the screw holes 4A is longer than or substantially the same as between each pad guide portion 6 described later.
[0008]
Reference numeral 5 denotes a pair of arms spaced apart in the circumferential direction of the disk 1. The arms 5 are integrally connected to the both ends in the length direction of the main beam 3 on the inner side which is the base end side, and become the tip side. The outer side extends in the axial direction so as to straddle the outer periphery of the disk 1. Then, as shown in FIG. 9, disc path portions 5A and 5A are respectively formed in the middle portion in the longitudinal direction of each arm portion 5, and each disc path portion 5A is in contact with each arm portion 5 on the outer peripheral side of the disc 1. It is cut as a concave groove to avoid this.
[0009]
Here, between each arm part 5, an inner side and an outer side friction pad (not shown) are slidably attached via respective pad guide parts 6 described later. Further, a pin hole 5C for slidably mounting a slide pin (not shown) provided on the caliper side is opened in the base end surface 5B of the arm portion 5.
[0010]
6, 6,... Denote pad guide portions as inner and outer side pad support portions protruding from the proximal end side and the distal end side of each arm portion 5, and each pad guide portion 6 is shown in FIG. As shown in FIG. 9, it has a substantially convex cross section and is formed so as to protrude from each arm portion 5 so as to face each other in the circumferential direction of the disc 1 and is disposed on both sides of each disc path portion 5A in the axial direction of the disc 1. Has been.
[0011]
Each pad guide portion 6 supports the friction pad provided between the arm portions 5 from both sides in the circumferential direction of the disk 1 and guides the friction pad so as to be slidable in the axial direction of the disk 1. It has become. Each pad guide portion 6 also serves as a torque receiving portion that receives rotational torque when the friction pad is pressed against the disk 1.
[0012]
Here, each pad guide portion 6 on the inner side of each pad guide portion 6 is at a position substantially corresponding to the main beam 3 in the axial direction of the disk 1 as shown in FIG. As shown in FIG. 7, it is disposed closer to the outer side in the radial direction than the main beam 3.
[0013]
7 is a reinforcing beam for increasing the rigidity of the mounting bracket 2 as a whole. The reinforcing beam 7 is elongated in a bow shape at a position closer to the outer side of the disk 1 than each arm portion 5, and the distal end side of each arm portion 5. Are connected together.
[0014]
Reference numeral 8 denotes a space formed in the mounting bracket 2 between the main beam 3, each arm portion 5 and the reinforcing beam 7, and the space 8 is formed in the main beam 3 as shown in FIGS. Each of the arms 5 and the reinforcing beam 7 is formed as an opening having a substantially rectangular shape.
[0015]
The disc brake according to the prior art has the above-described configuration. When the brake is operated, a friction pad provided between the arm portions 5 by a caliper provided slidably on the mounting bracket 2 is provided along each pad guide portion 6. A sliding force is applied to the disk 1 by sliding it and pressing it toward both sides of the disk 1.
[0016]
Here, the friction pads on the inner side and the outer side are fitted to the respective pad guide portions 6 that are formed so as to protrude from the respective arm portions 5 so as to face each other in the circumferential direction of the disk 1. The rattling between the arms 5 is suppressed to be small, and the generation of abnormal noise such as rattle noise is suppressed during the brake operation.
[0017]
When the mounting bracket 2 is integrally formed by casting, two split molds (with the mounting bracket 2 sandwiched from both the radially outer side and the radially inner side of the disk 1 with respect to the mounting bracket 2 shown in FIG. By disposing (not shown), the casting that is the material of the mounting bracket 2 is integrally formed.
[0018]
[Problems to be solved by the invention]
By the way, in the mounting bracket 2 according to the above-described prior art, the main beam 3 and the pad guide portions 6 on the inner side are disposed so as to face each other in the radial direction of the disk 1. On the base end side of each arm portion 5, a hollow portion extending in a concave curve toward the radial direction of the disk 1 at a position between the main beam 3 and each pad guide portion 6 as shown in FIG. 9, 9 are formed. Each recess 9 is located outside the space 8 together with each inner pad guide 6 when the mounting bracket 2 is viewed from the rotation center side of the disk 1 as shown in FIG. 3 so as to be hidden underneath.
[0019]
For this reason, when the mounting bracket 2 is formed by two split molds as described above, these split molds (upper mold and lower mold) are moved in the direction indicated by arrows B and C in FIG. When the molds are divided on both sides in the direction, one of the two split molds will be hooked on each pad guide portion 6 at a position corresponding to each recess 9, and for example, the mold can be removed in the direction of arrow B The inconvenience of disappearing occurs.
[0020]
Therefore, in the prior art, the entire mounting bracket 2 is integrally formed by casting including the portions corresponding to the respective recessed portions 9 as shown by the alternate long and short dash line in FIG. 7, and this portion is cut later. In many cases, a method of scraping off using a machining such as the above is employed.
[0021]
However, in this case, by processing each recess portion 9 (each pad guide portion 6), the total man-hour is increased and an extra time is spent, which not only increases the manufacturing cost but also increases the manufacturing cost. There is a problem that workability is lowered.
[0022]
On the other hand, a method of forming each of the depressions 9 separately using a core is conceivable. However, even in this case, the use of the core causes a problem that the entire workability at the time of manufacturing the mounting bracket 2 is lowered and the cost is increased.
[0023]
The present invention has been made in view of the above-described problems of the prior art, and the present invention can smoothly perform die-cutting on the pad support portion side of each arm portion, reducing the overall processing man-hour and processing time. It is an object of the present invention to provide a disc brake mounting member that can greatly improve the performance and reduce the manufacturing cost.
[0024]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a main beam that extends in the circumferential direction of the disc and is provided on a non-rotating portion of the vehicle on one axial side of the disc, and the disc from both longitudinal ends of the main beam. left extending in the axial direction of the disk so as to straddle the outer periphery of, composed of a right arm portion, the friction pad on the respective arm portions from Kakuude portion for slidably supporting the axial direction of the disk The present invention is applied to a disc brake mounting member that is integrally provided with pad support portions that are formed so as to face each other in the circumferential direction of the disc.
[0025]
The feature of the configuration employed by the invention of claim 1 is that the main beam is disposed at a position further away from the disc in the axial direction than the pad support portion of each arm portion on one side in the axial direction of the disc. An axial gap is formed between the pad support portion and the main beam, and an attachment portion that is fixed to a non-rotating portion of the vehicle is interposed between the main beam and the main beam. The configuration is that it is provided on the opposite side.
[0026]
With the above configuration, the main beam and the pad support portion can be provided at different positions in the axial direction of the disc, so that the entire mounting member is formed by casting using two split molds as described in the prior art. Sometimes, one split mold is not sandwiched between the main beam and the pad support in the radial direction of the disc from both sides of the radial direction of the disc, so that the split mold can be easily removed in the radial direction of the disc. can do.
[0027]
According to a second aspect of the present invention, the main beam attachment portion is disposed at a position closer to the inside than the pad support portions in the circumferential direction of the disk.
[0028]
As a result, the attachment portion can be arranged at a position farther from the disc than the friction pad provided between the pad support portions together with the main beam, so that the attachment portion is directed toward the friction pad side in the radial direction of the disc. And a sufficient mounting area of the attachment portion with respect to the non-rotating portion can be secured.
[0029]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a disc brake mounting member according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, the same components as those in the prior art are denoted by the same reference numerals, and the description thereof is omitted.
[0030]
1 to 6 show an embodiment according to the present invention. In the figure, reference numeral 11 denotes a mounting bracket as a disc brake mounting member used in the present embodiment. The mounting bracket 11 is integrally formed by means such as casting in substantially the same manner as the mounting bracket 2 described in the prior art. The main beam 12, each arm portion 14, and the reinforcing beam 16 described later are included.
[0031]
Reference numeral 12 denotes a main beam integrally provided on a knuckle arm 22 (described later) of the vehicle on the inner side of the disk 1, and the main beam 12 extends along the circumferential direction of the disk 1 in substantially the same manner as the main beam 3 according to the prior art. It is formed as an extended plate-like body.
[0032]
Here, as shown in FIGS. 4 to 6, the main beam 12 is integrally formed with the arm portions 14 at both ends in the length direction, and further on the inner side of the disc 1 than the base end surface 14B of each arm portion 14 described later. It is disposed at a position slightly shifted to the side by the dimension L3. As a result, the main beam 12 is disposed further in the axial direction of the disc 1 toward the inner side of the disc 1 than the inner-side pad guide portions 15 described later. A small gap corresponding to the dimension L4 is formed between them.
[0033]
Reference numerals 13 and 13 denote a pair of attachment portions provided on both sides in the longitudinal direction of the main beam 12, and each attachment portion 13 includes an attachment portion 4 according to the prior art as shown in FIGS. 2 to 5. And a screw hole 13A is formed at the center thereof. And each attachment part 13 is arrange | positioned on the opposite side of the friction pad 20 of the inner side mentioned later on both sides of the main beam 12. As shown in FIG.
[0034]
However, as shown in FIG. 4, each attachment portion 13 is disposed at a position closer to the inner side than each pad guide portion 15 in the circumferential direction of the disk 1, and the separation dimension L5 between the two attachment portions 13 is different from each other according to the prior art. It is different from that of the prior art in that it is set to be smaller than the separation dimension L2 between the wearing parts 4 (L5 <L2). As a result, the end portion 13B of the outer end portion of the attachment portion 13 located on the outer side in the radial direction of the disk 1 protrudes from the main beam 12 to a position near the outer peripheral portion of the inner friction pad 20 as shown in FIG. ing.
[0035]
Reference numerals 14 and 14 denote left and right arm portions connected to each other in the circumferential direction of the disk 1 by the main beam 12, and each arm portion 14 is configured in substantially the same manner as each arm portion 5 described in the prior art. Each disk path portion 14A is formed in the middle portion in the length direction. Further, as shown in FIGS. 2 and 3, the base end surface 14B of each arm portion 14 is formed in an approximately oval outer shape, and a pin hole 14C is opened at the center thereof.
[0036]
15, 15,... Indicate pad guide portions as pad support portions on the inner side and the outer side, and each pad guide portion 15 is substantially the same as each pad guide portion 6 according to the prior art as shown in FIGS. 2 to 6. Similarly, it has a substantially convex shape in cross section, and is formed so as to protrude from each arm portion 14 in the circumferential direction of the disk 1 so as to face each other.
[0037]
Here, the pad guide portions 15 on the inner side among the pad guide portions 15 are, together with the pad guide portions 15 on the outer side, as shown in FIG. 17.
[0038]
Reference numeral 16 denotes a reinforcing beam integrally connecting the distal ends of the arm portions 14, and 17 denotes a space formed in the mounting bracket 11 between the main beam 12, each arm portion 14 and the reinforcing beam 16, As shown in FIGS. 4 and 5, the space portion 17 is formed as a substantially rectangular opening surrounded by the main beam 12, the arm portions 14, and the reinforcing beam 16.
[0039]
A caliper 18 is slidably supported by the mounting bracket 11. The caliper 18 is disposed on the inner side of the disk 1 as shown in FIG. 1, and has a cylinder bore (not shown) formed therein. An inner leg 18A, a bridge portion 18B extending from the inner leg 18A to the outer side of the disk 1, and an integrally formed on the distal end side of the bridge 18B, are disposed on the outer side of the disk 1. An outer leg portion (not shown) and a pair of mounting portions 18C and 18C projecting from both ends of the inner leg portion 18A to the left and right in FIG. 1, respectively.
[0040]
Further, one end side of a sliding pin (not shown) is integrally attached to each mounting portion 18C via bolts 19, 19 and the like, and the other end side of each sliding pin is a pin of each arm portion 14. It is slidably inserted into the hole 14C. Thus, the caliper 18 is attached to the mounting bracket 11 in a state in which it can slide and displace in the axial direction of the disk 1.
[0041]
Reference numeral 20 denotes a friction pad (only the inner side is shown) disposed on both sides of the disk 1, and each friction pad 20 is formed in a substantially fan shape as shown in FIG. Recesses 20 </ b> A and 20 </ b> A are formed corresponding to the pad guide portions 15 of each arm portion 14. Each friction pad 20 is slidably fitted to the pad guide portion 15 of each arm portion 14 via a pad spring 21 and pressed against both surfaces of the disk 1 by the caliper 18 during brake operation. .
[0042]
Reference numeral 22 denotes a knuckle arm that constitutes a non-rotating part of the automobile. The knuckle arm 22 is located on the inner side of the disk 1 as shown in FIG. 5 and its tip side extends in a plate shape in the circumferential direction of the disk 1. Yes. A pair of mating surfaces 22A and 22A is formed on the tip side of the knuckle arm 22, and each mating surface 22A is integrally formed with each attachment portion 13 of the mounting bracket 11 abutted by each bolt 23 or the like. Installed on.
[0043]
The disc brake according to the present embodiment has the above-described configuration, and its basic operation is not different from that according to the prior art.
[0044]
However, in the present embodiment, the main beam 12 of the mounting bracket 11 is disposed at a position further away from the inner side pad guide portions 15 to the inner side of the disc 1, and the main beam 12 and the pad guide portions are arranged. By forming a gap in the axial direction (dimension L 4 in FIG. 4 ) between the pad guide portions 15 and the main beam 12, the arm portion 14, and the reinforcing beam as shown in FIG. 16 is arranged in the space portion 17 at positions on the four corners of the space portion 17 formed between the space portion 17 and the space portion 17.
[0045]
As a result, when the casting that is the material of the mounting bracket 11 is formed by two split molds (not shown), these split molds are arranged on the radially outer side of the disk 1 with respect to the mounting bracket 11 shown in FIG. It can be arranged on both sides of the inner side in the radial direction, and after molding, each split mold can be easily punched in the direction indicated by arrows B and C in FIG. Each split mold is not caught by the main beam 12 and each pad guide portion 15 at the time of die cutting. For example, it is necessary to cut the portions 24 and 24 indicated by the one-dot chain line in FIG. Disappears.
[0046]
Further, each attachment portion 13 integrated with the main beam 12 is located at a position farther closer to the inner side in the axial direction of the disc 1 than each inner side pad guide portion 15 (inner side friction pad 20). Since each attachment portion 13 is disposed at a position closer to the inner side than each pad guide portion 15 in the circumferential direction of the disk 1, for example, the end portion 13B of each attachment portion 13 is shown in FIG. Thus, even when formed so as to protrude from the main beam 12 to the vicinity of the outer peripheral portion of the friction pad 20, it is possible to avoid that each end portion 13B comes into contact with the friction pad 20, so that the friction between the end portion 13B and each end portion 13B can be avoided. The pad 20 can always be kept in a non-contact state, and the layout of each attachment portion 13 can be easily performed.
[0047]
Therefore, according to the present embodiment, the entire mounting bracket 11 including each pad guide portion 15 can be integrally formed in advance by casting, and cutting and the like performed as finishing after casting can be simplified. Man-hours required for production can be reduced, machining time can be shortened, overall workability can be improved, and production cost can be reduced. Further, the casting of the mounting bracket 11 can be formed without using the core, and this also improves the overall workability during processing.
[0048]
Further, even when the distance between the attachment portions 13 (dimension L5) is shortened, the attachment area of each attachment portion 13 that is directly attached to the non-rotating portion of the vehicle can be secured, and the attachment strength can be sufficiently increased. As a result, even when the thickness of the main beam 12 is relatively small on the side of each attachment portion 13, the influence on the rigidity of the main beam 12 can be reduced, and the mounting bracket 11 as a whole can be reduced in weight. it can.
[0049]
Furthermore, since each attachment portion 13 is provided on the opposite side of the friction pad 20 with the main beam 12 interposed therebetween, the knuckle arm 22 does not face the knuckle arm 22 in the radial direction of the disk 1. Thus, the inner friction pad 20 and the outer friction pad 20 can be formed to extend inward toward the main beam 12 with respect to the radial direction of the disk 1, for example, and the contact area of the friction pad 20 with the disk 1 can be increased. In addition, the brake performance of the disc brake can be improved.
[0050]
In the above embodiment, each pad guide portion 15 is described as protruding from each arm portion 14 so as to face each other. Instead, for example, each pad guide portion 15 has a substantially concave cross section. It is good also as a structure which forms as a recessed part which made | formed, and the friction pad 20 protrudes and forms the convex part slidably fitted in this recessed part.
[0051]
In the above embodiment, the disk brake is applied to an automobile. However, the present invention is not limited to this, and may be applied to a vehicle such as a two-wheeled vehicle.
[0052]
【The invention's effect】
As described above in detail, according to the first aspect of the present invention, the main beam extending in the circumferential direction on one side of the disk is arranged at a position further away from the disk in the axial direction than the pad support part of each arm part. An axial gap is formed between the pad support portion and the main beam, and an attachment portion attached to a non-rotating portion of the vehicle is interposed between the main beam and the friction pad. Since it is configured to be provided on the opposite side, the main beam and each pad support portion do not face each other in the radial direction of the disk, and the split mold for the mounting member is formed on both sides in the radial direction of the disk when molding each mounting member. And can be easily punched. As a result, the entire mounting member including each pad support portion can be integrally formed in advance by casting, and cutting processing such as machining performed after casting can be simplified as described in the prior art, which is necessary for the entire processing. It is possible to improve the overall workability by reducing the man-hours and the like, and to reduce the production cost. Further, the friction pad can be formed to extend inward in the radial direction of the disk toward the main beam side, the contact area of the friction pad with the disk can be increased, and the brake performance of the disk brake can be improved.
[0053]
In the invention of claim 2, since the attachment portion of the main beam is arranged at a position closer to the inner side than the pad support portion of each arm portion in the circumferential direction of the disk, the attachment portion for the non-rotating portion Even when the mounting area is formed large, the attachment portion and the friction pad can be kept in a non-contact state at all times, so that the thickness of the main beam is made relatively small on the attachment portion side. Even in this case, the influence on the rigidity of the main beam can be reduced, and the weight of the entire mounting member can be reduced.
[Brief description of the drawings]
FIG. 1 is a plan view of a disc brake according to an embodiment of the present invention.
2 is a front view showing a mounting bracket, a friction pad and the like with the caliper in FIG. 1 removed. FIG.
FIG. 3 is a front view showing the mounting bracket in FIG. 2 alone;
4 is a plan view showing a mounting bracket in FIG. 3. FIG.
5 is a bottom view showing the mounting bracket in FIG. 4. FIG.
6 is a cross-sectional view seen from the direction of arrows VI-VI in FIG.
FIG. 7 is a front view showing a disc brake mounting bracket according to the prior art alone;
8 is a plan view showing the mounting bracket in FIG. 7. FIG.
9 is a bottom view showing the mounting bracket in FIG. 7. FIG.
[Explanation of symbols]
1 Disc 11 Mounting bracket (Mounting member)
12 Main beam 13 Attachment part 14 Arm part 15 Pad guide part (pad support part)
18 Caliper 20 Friction pad 22 Knuckle arm (non-rotating part)

Claims (2)

A main beam provided in a non-rotating portion of the vehicle on one side in the axial direction of the disc and extending in the axial direction of the disc so as to straddle the outer periphery of the disc from both ends in the longitudinal direction of the main beam. Left and right arm parts, and each arm part is opposed to each other from each arm part in the circumferential direction of the disk in order to support the friction pad slidably in the axial direction of the disk. In the disc brake mounting member formed integrally with the protruding pad support portion,
The main beam is disposed at a position further away from the disk in the axial direction than the pad support part of each arm part on one side in the axial direction of the disk, and the axial direction is between the pad support part and the main beam. It is configured to form a gap,
The or One the main beam, the attachment member for a disc brake, characterized in that a configuration in which the attachment portion fixed to a non-rotating portion of the vehicle on the opposite side of the friction pad across the main beam.   2. The disc brake mounting member according to claim 1, wherein the attachment portion of the main beam is disposed at a position closer to the inside than the pad support portions in the circumferential direction of the disc.

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