JPH0589977U - Disc brake device - Google Patents

Abstract

(57) [Abstract] [Object] The present invention relates to a vehicle disc brake device, which is provided with two disc brake calipers to enhance braking efficiency, and which are connected in series to effectively utilize a narrow mounting space. The purpose is to [Structure] A first disc brake caliper 9 and a second disc brake caliper 10 are arranged side by side at a desired interval on the circumference of a disc 7, and a brake hose 17 is provided inside the vehicle of the disc 7. It is configured by connecting in series.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle disc brake device.

[0002]

[Prior Art]

 Normally, a disc brake device has a disc (steel disc) attached to the wheel side, a disc brake caliper attached to the axle or strut side (hereinafter referred to as a caliper if necessary), and a piston provided in the caliper section. And a pad (braking pad) that is pressed by the piston to pinch the disc. When the brake petal is stepped on, the hydraulic pressure applied to the cylinder part of the caliper activates the piston and pushes the pad to push the outer circumference of the disc. It is configured to clamp the part from both sides.

FIG. 3 is a partial front view of only a main part of the conventional independent suspension type front wheel disc brake device as viewed from the inside of the vehicle. In FIG. 3, 1 is a wheel, 7 is a disc provided inside the wheel 1 on the inner side of the vehicle of the hub, and 9 is a disc inside the wheel 1 inside the wheel 1 that avoids the knuckle 4 shown by the two-dot chain line. The brake hose 16 is a caliper provided on the outer peripheral portion of the caliper 7, and is connected to the cylinder 11 of the caliper 9 by introducing it from the outer peripheral direction of the brake hose 16 communicating with a hydraulic device not shown.

[0004]

[Problems to be solved by the device]

 However, in general, the disc brake device has the advantage that the disc is exposed to the air and rotates, so that the heat dissipation is good and the braking force is stable, while the friction area between the disc and the pad (braking pad) is large. Since it is small, it is necessary to increase the braking efficiency by increasing the pressing force of the pad.

By the way, in the outer peripheral portion of the disc inside the wheel, the place where the caliper can be installed is extremely narrow, and the mounting position is restricted to a very limited position due to the presence of a knuckle on the back. Therefore, conventionally, only one caliper is provided, and there is no one having two calipers. Therefore, in order to improve the braking efficiency, a material with high strength is used for the braking pad to supplement this.

The present invention was devised in view of such a point, and as a position where a caliper can be attached, at a target position where the knuckle is sandwiched, not only the front side of the knuckle but also the knuckle as in the conventional case. By selecting a caliper installation location on the rear side of the pad and adopting a twin caliper system with two calipers, the wear area of the pad as a whole is increased and the wear life of the pad is secured. In addition to improving braking efficiency, a brake hose that connects two calipers in series is provided on the inner side of the vehicle, that is, on the back side of the wheel, so that the twin caliper can be installed effectively in a narrow space. The purpose is to provide a disc brake device that can be realized.

[0007]

[Means for Solving the Problems]

 Therefore, in the disc brake device of the present invention, two disc brake calipers for pinching the disc are installed side by side at a desired interval on the circumference of the disc brake device installed on an independent suspension type wheel. In addition, a brake hose that connects the two disc brake calipers in series is disposed in the vehicle inner side portion of the disc.

[0008]

[Action]

 In the above-described disc brake device of the present invention, in a narrow place inside the wheel, two positions where the knuckle is sandwiched are selected, and the conventional concept that only one is provided as in the conventional case is exceeded. Since two calipers are provided, the pad friction area is expanded and braking efficiency is improved.

For this reason, two calipers are connected in series, and the connecting brake hose is arranged on the back side of the disc so that a narrow space can be effectively used.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 and FIG. 2 show an embodiment of a disc brake device according to the present invention. FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and in FIG. 1 and FIG. 2, the same reference numerals as those in FIG. 3 indicate almost the same parts.

1 and 2, reference numeral 1 denotes a wheel, which is rotatably mounted on a knuckle spindle 5 of a knuckle 4 together with a hub 3 via a bearer ring 6. Further, 7 is a disk (ventilated disk rotor) attached to the hub 3, and the disk 7 is composed of a wheel 1 from the outer peripheral side and the vehicle outer side and a hub 3 from the inner peripheral side. It is provided so as to be enclosed in a ring-shaped vacant chamber 8 inside the enclosed wheel 1.

Reference numeral 9 is a first disc brake caliper (first caliper), and the first caliper 9 is located in the space of the space 8 formed outside the front of the knuckle 4 and is located in the disk 7 Are arranged so as to be located on the outer peripheral portion of the. Further, 10 is a second disc brake caliper (second caliper), and this second caliper 10 is located in the void space of the void space 8 formed on the rear outer side of the knuckle 4, The caliper 9 and the caliper 9 are arranged so as to be positioned on the outer peripheral portion of the disk 7 with a desired gap.

Further, in each of the first and second calipers 9 and 10, a cylinder 11 is provided integrally with the body of the caliper to form an oil chamber 12, and a piston 13 is formed in the oil chamber 12. Pads (braking pads) 15 and 15 are provided between the piston 13 and the corresponding legs 14 of the caliper body so as to sandwich both circumferential side surfaces of the disk 7 therebetween.

A brake hose 16 from a hydraulic device (not shown) is connected to the oil chamber 12 of the first caliper 9 from the outside of the caliper 9, and the oil chamber 12 of the first caliper 9 is also connected. The second caliper 10 and the oil chamber 12 of the second caliper 10 are connected to each other by a serial connection brake hose 17 which is arranged on the inner side of the vehicle, that is, on the back side of the disc 7 near the central axis. It is connected in series after the first caliper 9.

In this way, the two calipers 9 and 10 are provided by selecting a desired empty space in the narrow empty space 8 in the wheel 1, and these are connected in series on the inner side of the vehicle. It is configured as a type disc brake device. Therefore, when the brake petal is stepped on, hydraulic pressure (brake hydraulic pressure) is sequentially applied to the two calipers 9 and 10, and both calipers 9 and 10 are actuated so that the disk brake device can be moved. There is.

With the above-described configuration, in the present disc brake device, the two calipers 9 and 10 are provided at desired intervals by selecting the layout, so that compared to the disc brake device having one caliper. , The friction area of the pad 15 against the disc 7 is increased, the wear life of the pad is secured, the braking efficiency of the disc brake is improved and the life is extended, and the two calipers 9, Since 10 brakes are connected in series and the brake hose for this series connection is connected to the inside of the back side of the disk 7, the brake hose 17 as a whole can be short and small, so it does not take up space and is an independent suspension type. It is possible to realize a twin caliper type disc brake device even for a complicated and narrow inner wheel structure such as a front wheel. Is doing.

[0017]

As described above in detail, according to the disc brake device of the present invention, in the disc brake device installed on the independent suspension type wheel, the disc brake caliper that presses the disc is provided on the circumference of the disc. Two disc brake calipers are arranged side by side at a desired interval, and a brake hose that connects the two disc brake calipers in series is arranged on the inner side of the vehicle of the discs. The advantage is that the calipers are skillfully arranged and connected by utilizing the narrow space in the wheel, which makes it possible to obtain a disc brake device with better braking efficiency than one disc brake caliper. There is.

[Brief description of drawings]

FIG. 1 is a front view of a disc brake device according to an embodiment of the present invention, as viewed from the inside of a vehicle.

FIG. 2 is a cross-sectional view of a wheel unit having the present disc brake device taken along the line II of FIG.

FIG. 3 is a front view of a disc brake device according to a conventional example as viewed from the inside of the vehicle.

[Explanation of Codes] 1 Wheel 3 Hub 4 Knuckle 5 Knuckle Spindle 6 Beering 7 Disc 8 Vacancy Section 9 First Disc Brake Caliper 10 Second Disc Brake Caliper 11 Cylinder 12 Oil Chamber 13 Piston 14 Leg 15 Pad 16 Brake Hose 17 Brake hose for series connection

Claims (1)

[Scope of utility model registration request] 1. A disc brake device installed on an independent suspension type wheel, wherein two disc brake calipers for sandwiching the disc are arranged side by side at a desired interval on the circumference of the disc. A disc brake device, characterized in that a brake hose for serially connecting individual disc brake calipers is disposed on the vehicle inner side portion of the disc.