JPH04285335A - Integral type brake caliper - Google Patents

Abstract

PURPOSE:To obtain rigidity preferable in view of brake ability by reducing a bending moment of sliding pins at the time of braking by a piston, to reduce size and weight of a caliper compared to a divided type, and to obtain high rigidity through a plate cross section structure. CONSTITUTION:In an integrated brake caliper 1, a main body having a piston and a pad which pressurize one side of a rotor is integrated with a reaction part 16 having a pad which pressurizes the other side of the rotor. The caliper 1 is movably supported to a caliper support 3 by means of sliding pins 5, 5 at two portions of the rotor rotating-in side and the rotor rotating-out side across the piston. The centers P, P of the sliding pins and piston centers O, O are substantially linearly arranged in a side view so as to integrate the main body with the reaction part 16. A plane cross section 21 which surrounds a braking operation part for the rotor is formed on a side of the rotor center compared to the linear passing through the centers P, P of the sliding pins.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a brake caliper for a disc brake, and in particular, it has a piston that pushes one side of the rotor only on the main body side, and a reaction part that receives the other side of the rotor is integrally connected to the main body. The present invention relates to an integrated brake caliper that is movably supported on a caliper support by slide pins at two locations, one on the rotor retraction side and one on the rotor retraction side, with the piston in between.

0002

2. Description of the Related Art An integrated brake caliper for a disc brake is integrally equipped with a main body having a piston and a pad that presses one side of a rotor, and a reaction part having a pad that presses the other side of the rotor. , which is movably supported on a caliper support by two slide pins provided on the rotor entry side and the rotor exit side with the piston in between, is known from Japanese Utility Model Publication No. 60-21563. Also, unlike an integrated brake caliper, it has a main body with two pistons and a separate reaction part.
Although this is a split brake caliper that is connected by multiple bolts on the outer circumferential side of the part that faces the rotor, the centers of both pistons and the centers of both slide pins on the rotor rotation side and rotation side are arranged almost in a straight line when viewed from the side. What was done was the special public service in 1972
It is publicly known from the publication No.-14294.

0003

[Problems to be Solved by the Invention] In the integrated brake caliper, as disclosed in the above-mentioned Japanese Utility Model Publication No. 60-21563, two slide pins for moving the brake caliper relative to the caliper support are provided on the outer peripheral side of the rotor from the piston position. In the case where the piston is used for braking, a bending moment is applied to the slide pin portion during braking by the piston, which is undesirable from the viewpoint of braking performance. On the other hand, in the split type brake caliper, which is different from the integrated type,
As disclosed in Publication No. 14294, by arranging the centers of each two pistons and slide pins in a substantially straight line when viewed from the side, the bending moment can be reduced and the braking performance is improved, but the Since the brake caliper is a split type brake caliper in which the caliper body and the caliper reaction part are connected by a plurality of bolts on the outer circumferential side, the caliper body inevitably becomes larger and heavier.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an integrated brake caliper that has rigidity that is advantageous in terms of braking performance and that allows the caliper and support to be made more compact and lightweight.

[0005]

[Means for Solving the Problems] In order to solve the above problems, the present invention includes a main body having a piston and a pad that presses one side of the rotor, a reaction part having a pad that presses the other side of the rotor, and In a brake caliper that is movably supported on a caliper support by slide pins at two locations on the rotor rotation side and rotor rotation side with the piston in between,
The centers of both slide pins and the center of the piston are arranged substantially in a straight line in a side view, and the main body and the reaction portion are integrally molded, and the center of the slide pins is located closer to the center of the rotor than the straight line connecting the centers of the slide pins. , characterized in that it has a closed cross section surrounding a braking portion for the rotor. Furthermore, the present invention is characterized in that the outer peripheral side of the portion facing the rotor has an opening larger than the diameter of the piston.

[0006]

[Operation] In the integrated brake caliper, in which the main body with the piston and its reaction part are integrally molded, the centers of both slide pins and the center of the piston are arranged approximately in a straight line when viewed from the side, so both slides during braking by the piston. It reduces the bending moment of the pin part and provides good rigidity for braking performance, and since there is no need for a fastening member between the caliper body and the reaction part, it is more compact and lighter than a split type brake caliper. Moreover, since the closed cross section is located closer to the center of the rotor than the straight line connecting the centers of both slide pins and surrounds the part for braking the rotor, high rigidity can be obtained. Further weight reduction can be achieved by providing an opening larger than the piston diameter on the outer peripheral side of the portion facing the rotor, including the closed cross section.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. 1 to 5 illustrating an integrated brake caliper and caliper support installed state according to an example to which the present invention is applied
, 1 is the brake caliper, 3 is the caliper support, 5 is the slide pin, O is the piston center, P is the slide pin center, and R is the interference avoidance line with the rotor. The brake caliper 1 is made of cast steel and is formed by integrally molding a main body part 11 in which two cylinders 12, 12 for housing pistons (not shown) are formed, and a reaction part 16 facing the main body part 11. The rotor is movably supported by slide pins 5, 5 on the input and output sides of the rotor, and is movably supported by caliper supports 3 made of cast steel, cast iron, forged products, sheet metal, etc., as shown in FIG. 2. , both piston centers O, O and both slide pins P, P centers are in a straight line L
placed above.

In detail, the integrated brake caliper 1 includes:
It is constructed as shown in FIGS. 6 to 9, which are single-piece drawings thereof. That is, the main body 11 has two cylinders 12, 12.
Thin support pieces 14, 1 are provided on both sides of the central thick part 13 having
4, and a bolt through hole 15 is formed in this support piece 14. Although not shown, a piston that pushes one side of the rotor is housed in each cylinder 12, 12, and the protruding ends of both pistons are provided with pads that come into sliding contact with one side of the rotor. The reaction part 16 facing the main body part 11 has circular holes 17, 17 which are concentric and have the same diameter as the cylinders 12, 12. is formed for. Although not shown, the circular hole 17,
A pad is provided on the inner side surface of the central portion having 17 for sliding contact with the other side surface of the rotor.

The main body part 11 and the reaction part 16 have an integral structure in which both sides are connected by bridge parts 19, 19, and the outer peripheral surfaces of the bridge parts 19, 19 are designed to avoid interference with wheels (not shown). It is formed into an arcuate surface along a line. Further, a closed cross section 11 is formed surrounded by the central thick part 13 of the main body part 11, the central part of the reaction part 16 opposing this, and the bridge parts 19, 19 on both sides. A large opening 22 is formed on the outer circumferential side of the portion including the portion 21 and facing the rotor. Furthermore, a support storage part 23 is formed in the bridge part 19, and a protrusion 24 located parallel to the support storage part 23 on the side of the opening 22 has an arc-shaped recess along the interference avoidance line R with the rotor. 25 is formed.

The caliper support 3 has mounting holes 32, 32 at both ends of a bridge-shaped mounting piece 31, and extends from both sides of the mounting piece 31 along the support housing portions 23, 23 of the integrated brake caliper 1. A slide pin insertion hole 34 is formed in the arm portion 33, and a bridge-shaped reinforcing piece 35 is provided to connect the protruding ends of the arm portions 33, 33. Slide pin 5
is composed of a bolt 51 having a head 52 and a threaded portion 53, and a pin 54 having a threaded hole 55. Note that the slide pin 5 may have a pin portion integrally provided at the tip of the bolt 51, and in that case, the caliper body portion 11
A threaded portion is formed in the support piece 14 in place of the bolt through hole 15.

Regarding assembly, first insert the slide pin insertion holes 34, 34 in the arms 33, 33 of the caliper support 3.
Then, the pins 54, 54 of the slide pins 5, 5 are slidably fitted, respectively, and the arm portions 33, 3 of the caliper support 3 are inserted into the support housing portions 23, 23 of the integrated brake caliper 1.
3 each. And the caliper main body support piece 14,
Insert the slide pins 5, 5 into the bolt through holes 15, 15 of 14.
through the bolts 51, 51 of the support arm portions 33,
The threaded portions 53, 53 of the bolts 51, 51 are fastened to the threaded holes 55, 55 of the pins 54, 54 in the caliper 33, respectively, and the caliper body support piece 14 is connected to the bolt head 51 and the pin 54 at each location. At the same time, the boot 56 covers and seals the space between the pin 54 and the support arm 33. In the above assembled state, as shown in Fig. 2, both piston centers O, O and both slide pin centers P, P are arranged on a straight line L in side view. A straight line L is a straight line N connecting the center of the rotor and the midpoint between the piston centers O, O, and the piston centers O, O.
They are perpendicular to each other at the midpoint between them.

The integrated brake caliper 1 includes a main body portion 11, a reaction portion 16, and bridge portions 19 on both sides.
, 19, a closed cross section 21 is formed which is located closer to the center of the rotor than the straight line L and surrounds a part for braking the rotor, and which includes this closed cross section 21 and faces the rotor. An opening 22 larger than the piston diameter, that is, the diameter of the cylinder 12, is formed on the outer peripheral side of the portion. In addition, the reinforcing piece 35 of the caliper support 3
As shown in FIG. 2, it has a curved shape that extends over the caliper reaction part 16 and is located on the outside of the central part in an extension line of both piston centers O, O.

According to the integrated brake caliper 1 having the above structure, the main body part 11 has two pistons and pads that push one side of the rotor, and the reaction part 16 has a pad that pushes the other side of the rotor. Due to the integrated structure, the two bridge parts 19, 19, whose outer circumferential surfaces are formed into arcuate surfaces along the interference avoidance line with the wheel, are connected at two locations on the rotor entry side and the recovery side with the piston in between. By eliminating the need for any fastening members between the main body and the reaction part such as in a split brake caliper, the interference avoidance line with the wheel can be made smaller in diameter, and therefore the brake caliper 1 itself and the caliper support 3 can be made compact and lightweight. can. Then, when viewed from the side, the slide pin centers P and P and the piston centers O and O are connected to the straight line N that connects the center of the rotor and the midpoint between the piston centers O and O. Since the structure is arranged on a straight line L that intersects perpendicularly at the point, it is possible to eliminate the bending moment of both slide pins 5, 5 during braking by the piston, and therefore, it is possible to obtain the best rigidity in terms of braking performance.

Moreover, the integrated brake caliper 1 includes a main body portion 11, a reaction portion 16, bridge portions 19 on both sides,
19, the closed cross-section portion 21 is located closer to the center of the rotor than the straight line L and surrounds the portion for braking the rotor, so that it is most excellent in terms of rigidity. Furthermore, the integrated brake caliper 1 has a structure in which an opening 22 larger than the piston diameter is provided on the outer circumferential side of the portion that includes the closed cross-section portion 21 and faces the rotor, and is therefore excellent in terms of weight reduction.

In the embodiment, the caliper main body 11 has two
Although this example has two pistons, it is equally applicable to one that has one piston. In that case, the straight line connecting both slide pin centers P and P is the line between the rotor center and one piston center. It is perpendicular to the straight line connecting O. Also, both slide pin centers P, P and piston center O
are not necessarily located on a straight line L, but even if they are located substantially on a straight line, the bending moment of both slide pins 5, 5 during braking by the piston can be reduced. Furthermore, by installing bolts and nuts, for example, between the main body part 11 and the reaction part 16 of the brake caliper 1 on the rotor outer peripheral side of the opening 22, it is possible to prevent the pad from falling off and to ensure further rigidity. It is also possible.

[0016]

As described above, according to the integrated brake caliper of the present invention, the centers of both slide pins and the center of the piston are arranged substantially in a straight line when viewed from the side, so that when braking by the pistons, the parts of both slide pins are It is possible to reduce the bending moment and provide good rigidity for braking performance, and because there is no need for a fastening member between the caliper body and the reaction part, it is more compact and lighter than a split type brake caliper. Moreover, since the structure includes a closed cross section that is located closer to the center of the rotor than the straight line connecting the centers of both slide pins and surrounds the part for braking the rotor, higher rigidity can be provided. Further weight reduction can be achieved by providing an opening larger than the piston diameter on the outer peripheral side of the portion facing the rotor, including the closed section.

[Brief explanation of the drawing]

[Fig. 1] A plan view from the rotor side showing an integrated brake caliper and a caliper support installed state according to an example to which the present invention is applied.

[Figure 2] Side view also seen from the reaction part side

[Figure 3] Side view also seen from the main body side

[Fig. 4] Cross-sectional view taken along the arrow A-A line in Fig. 2

[Fig. 5] A perspective view from the rotor side showing the integrated brake caliper and caliper support installed state.

[Figure 6] Plan view of the integrated brake caliper as seen from the rotor side

[Figure 7] Single item plan view also seen from the outer periphery side

[Fig. 8] Perspective view of a single item also seen from the rotor side

[Figure 9] Perspective view of a single item also seen from the outer circumferential side

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Brake caliper, 11... Body part, 16... Reaction part, 21... Closed section, 22... Opening part, 3... Caliper support, 5... Slide pin, O... Piston center, P... Slide pin center, R... Rotor interference avoidance line.

Claims (2)

[Claims] Claim 1: A main body having a piston and a pad that presses one side of the rotor, and a reaction part having a pad that presses the other side of the rotor, and has two locations on the rotor retraction side and rotor retraction side with the piston in between. In the brake caliper that is movably supported on a caliper support by a slide pin, the centers of both the slide pins and the center of the piston are arranged substantially in a straight line when viewed from the side, and the main body and the reaction portion are integrally molded. The integrated brake caliper is further characterized in that it has a closed section that surrounds a braking portion for the rotor, which is closer to the center of the rotor than the straight line connecting the centers of both slide pins. [Claim 2] On the outer peripheral side of the portion facing the rotor,
The integral brake caliper according to claim 1, characterized in that the integral brake caliper has an opening larger than the diameter of the piston.