JP4648366B2 - Disc brake device for vehicle - Google Patents

Description

  The present invention relates to a vehicle disc brake device including a parking brake cable.

The disc brake device brakes a wheel by sandwiching a disc rotor that rotates together with the wheel using hydraulic pressure. Moreover, what was used for the rear wheel is generally provided with a parking brake device (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 6-50677 (5th page, FIG. 2)

Patent document 1 is demonstrated based on the following figure.
FIG. 8 is a diagram for explaining a conventional technique. In a conventional mechanical vehicle disc brake 201, hydraulic fluid for pressing the disc rotor 202 is supplied from an inlet port 205 to an action portion (cylinder) 204 of the caliper 203. Supplied. In addition, a parking brake device is provided, and a brake wire 206 of the parking brake device is supported by a mounting arm 208 of the caliper 203 via a wire arm 207.

  However, in the mechanical vehicle disc brake 201 of Patent Document 1, since the wire arm 207 is fastened with the bolt 209 to the mounting arm 208 protruding from the caliper 203, the head of the bolt 209 and the bolt under the cold region conditions. Snow, ice and mud may adhere to the outer surface of the caliper 203 near 209. As a result, there is a problem that snow, ice and mud adhere to the wire arm 207, and the function of the brake wire 206 is impaired. The brake wire 206 may be damaged.

  It is an object of the present invention to provide a vehicle disc brake device that prevents snow, ice, and mud from adhering between a parking brake cable of a parking brake device and a caliper.

  The invention according to claim 1 includes a hydraulic brake mechanism provided on a U-shaped caliper, to which pads for pressing both sides of a disk rotor rotating together with a wheel are connected, and a parking brake device. A parking brake cable, a cam lever that holds the end of the parking brake cable at the tip, a cable support member that holds the parking brake cable, a cable support member that is fastened with a bolt, In the vehicle disc brake device provided with the bulging fastening boss, the outer surface of the caliper facing the parking brake cable is between the tip of the cam lever and the holding portion of the cable support member. Parallel to the height of the bolt head Wherein the of being formed on the flat surface.

  According to a second aspect of the present invention, there is provided a hydraulic brake mechanism provided on a U-shaped caliper, to which pads for pressing both sides of a disk rotor rotating together with a wheel are connected, and a parking brake device. The parking brake cable, the cam lever that holds the end of the parking brake cable at the tip, the cable support member that holds the parking brake cable, and the cable support member that swells out from the caliper In a vehicle disc brake device having a boss portion, the axis is parallel to the axis of the parking brake cable and substantially coincides with the position of the bolt head so as to cover the outer peripheral surface of the cylinder facing the parking brake cable. Cover part that is flat with a height and is fastened with bolts Characterized in that it comprises a.

  In the invention according to claim 1, the outer surface of the caliper facing the parking brake cable is parallel to the axis of the parking brake cable and between the tip of the cam lever and the holding portion of the cable support member, and the bolt head Since it is formed on a flat surface that is almost the same height as the position, the space between the outer surface of the caliper and the head of the bolt becomes a substantially flat surface, and the space between the outer surface of the caliper and the head of the bolt becomes narrow, and the gap between them The thickness and lump of snow clogged in is thin, and the puddle tends to collapse. Therefore, there is an advantage that it is possible to prevent snow, ice and mud from adhering between the parking brake cable of the parking brake device and the caliper.

  In the invention according to claim 2, a flat surface having a height that is parallel to the axis of the parking brake cable and substantially coincides with the position of the head of the bolt so as to cover the outer peripheral surface of the cylinder facing the parking brake cable. Since the cover member is formed and fastened with a bolt, the space between the outer surface of the caliper and the head of the bolt becomes a substantially flat surface, and the space between the outer surface of the caliper and the head of the bolt becomes narrower. The thickness and lump of snow clogged up in the gap is thin, and the puddle tends to collapse. Therefore, there is an advantage that it is possible to prevent snow, ice and mud from adhering between the parking brake cable of the parking brake device and the caliper.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is a perspective view of a vehicle disc brake device (first embodiment) according to the present invention.
FIG. 2 is a view taken in the direction of the arrow 2 in FIG. 1 and shows the bottom surface of the vehicle disc brake device.

  The disc brake device 11 is employed in the rear wheel 12 and brakes the right rear wheel 12 by pressing a disc rotor 13 that rotates together with the right rear wheel 12 from both sides, for example, and has a parking brake device 14. .

  The disc brake device 11 includes a connecting member 22 connected to the rear suspension device 21, a caliper 23 attached to the connecting member 22, a hydraulic brake mechanism 25 provided on the caliper 23, and a hydraulic brake mechanism 25. Pads 27 (see also FIG. 3) that press both surfaces of the disk rotor 13 by being connected and supplying hydraulic fluid with the hydraulic hose 26 are provided.

  FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 1 and shows a cross section of the hydraulic brake mechanism 25 and a cross section of the parking brake device 14 provided in the disc brake device 11. This will be described with reference to FIGS.

The hydraulic brake mechanism 25 includes a cylinder 31 connected to the caliper 23 and a piston 32 slidably fitted in the cylinder 31.
The cylinder 31 is formed with an opening (opening 33) on the disk rotor 13 side and a length set in the direction of the axis Cr of the disk rotor 13 (the direction of the arrow a1). A shaft fitting hole 36 is formed at the rear end 35 facing the opening 33.
A pad 27 is connected to the piston 32.

The parking brake device 14 includes a parking brake cable 38 connected to a parking brake lever (not shown) provided in the passenger compartment, and a cable support member 42 that supports the parking brake cable 38 at a tip (one end) 41. And a fastening boss portion 46 formed on the outer peripheral surface 45 of the cylinder 31 in order to fasten the fixing portion (the other end) 43 of the cable support member 42.
The outer peripheral surface 45 of the cylinder 31 is included in the outer surface 47 of the caliper 23 in a superordinate concept.

  The parking brake device 14 includes a cam lever 52 that engages a connecting end 51 that is an end of the parking brake cable 38, and is integrally fitted to the cam lever 52 and fixed by a nut 54. A camshaft 55, a return spring 56 fitted to the outer surface of the nut 54, and a push rod mechanism 57 in contact with the camshaft 55. The piston 32 is connected to the push rod mechanism 57.

  The camshaft 55 is attached to the shaft fitting hole 36 via a bearing 58. Then, when the parking brake cable 38 is rotated by the pulling force (in the direction of the arrow a2), the piston 32 is advanced toward the disk rotor 13, so that the pad 27 is pressed against the disk rotor 13.

  In addition, the camshaft 55 is fitted and fixed to the base end portion 62 of the cam lever 52 to the protruding end portion 61 protruding from the shaft fitting hole portion 36 (a length corresponding to the height of the nut 54). .

4 is a cross-sectional view taken along line 4-4 of FIG.
The cable support member 42 is formed with a fixing portion 43 attached to a fastening boss portion 46 bulging outward of the cylinder 31 with a bolt 64 at one end side, bent at a substantially right angle to the fixing portion 43 and formed at the other end. Then, the guide hole 65 is opened at the other end, and the outer tube 66 of the parking brake cable 38 is fixed to the guide hole 65, whereby the parking brake cable 38 is held.
The thickness of the cable support member 42 is t.

  The disc brake device (first embodiment) 11 is located laterally (in the direction of arrow a3) (at 9 o'clock) toward the front of the vehicle with respect to the center of the disc rotor 13 shown in FIG. The cable support member 42 is disposed above the portion between the connection end 51 of the parking brake cable 38 and the cable support member 42, and the plate surface 67 of the cable support member 42 is inclined forward and downward (arrow a4). Direction).

  5 (a) and 5 (b) are explanatory views of the outer shape of a cylinder provided in the vehicle disc brake device (first embodiment) according to the present invention, (a) is a plan view, and (b) is a perspective view. It is. This will be described with reference to FIGS.

  Specifically, the cylinder 31 is integrally formed with the outer peripheral surface 45 so as to reach a height from the seat surface portion 68 of the fastening boss portion 46 to the nut 54 in the fastening state, with a raised flat portion 71 (indicated by a dashed diagonal line pattern in (a)). The range shown) is formed. Further, the flat surface 72 of the raised flat portion 71 facing the parking brake cable 38 is formed substantially parallel to the fixing portion 43 and the plate surface 67 of the cable support member 42.

The height of the flat surface 72 is H, which is the height from the seat surface portion 68 of the fastening boss portion 46, and is also a distance that substantially coincides with the position of the head 76 of the bolt 64.
The flat surface 72 is parallel to the axis Cb of the parking brake cable 38 between the distal end portion 74 of the cam lever 52 and the holding portion 75 of the cable support member 42.

That is, the flat surface 72 is formed on the outer surface 47 of the caliper 23 facing the parking brake cable 38, which is located between the front end portion 74 of the cam lever 52 and the holding portion 75 of the cable support member 42 (distance Lc). This is a part parallel to the axis Cb of the parking brake cable 38.
“Parallel” includes tolerance and includes substantially parallel.

  The fastening boss portion 46 is parallel to the axis Cb of the parking brake cable 38 between the distal end portion 74 of the cam lever 52 and the holding portion 75 of the cable support member 42 and is radially outward (arrow) of the inner diameter of the cylinder 31. This is a portion formed in a convex shape in the direction of a5).

FIG. 6 is a view for explaining the relationship between the disc brake device for a vehicle (first embodiment) of the present invention and the adhesion of snow. This will be described with reference to FIGS.
Under cold conditions, when the snow S on the road is rolled up by the rotation of the front wheels of the vehicle or the traveling wind flowing through the bottom of the vehicle, the rolled up snow S scatters and is used for the rear disc brakes for the vehicle. The device 11 is also reached. In particular, the snow S comes into contact with the caliper 23 or the cable support member 42 that faces diagonally forward and downward (in the direction of the arrow a4) of the vehicle as shown by the arrow b1. Then, snow blows into the gap of the concave portion 78 between the caliper 23, the cable support member 42, and the head 76 of the bolt 64, and clogging starts. It tends to collapse like b2. As a result, there is an advantage that it is possible to prevent snow, ice and mud from adhering between the parking brake cable 38 of the parking brake device 14 and the caliper 23.

  Thus, in the vehicle disc brake device (the first embodiment), the outer surface of the caliper 23 facing the parking brake cable 38 between the tip 74 of the cam lever 52 and the holding portion 75 of the cable support member 42. 47 is formed on a flat surface 72 having a height parallel to the axis Cb of the parking brake cable 38 and substantially coincident with the position of the head 76 of the bolt 64, so that the outer surface 47 of the caliper 23 and the head 76 of the bolt 64 are formed. And the concave portion 78 between the cable support member 42 and the cable support member 42 is narrowed, and it is difficult to form a lump of snow in the concave portion 78, thereby preventing snow, ice, and mud from adhering between the parking brake cable 38 and the caliper 23. Can do.

Next, another embodiment of the vehicle disc brake device will be described.
FIG. 7 is a diagram of the second embodiment and corresponds to FIG. The same components as those in the embodiment shown in FIGS. 1 to 6 are designated by the same reference numerals and description thereof is omitted.

The disc brake device 11B according to the second embodiment is characterized by including a cylinder 31B connected to the caliper 23 and a cover member 81 fastened to the cable support member 42.
In the cylinder 31B, the outer peripheral surface 45 facing the parking brake cable 38 has a substantially constant wall thickness ts.

  The cover member 81 covers the outer peripheral surface 45 facing the parking brake cable 38. Specifically, it covers the outer surface 47 of the caliper 23 that faces the parking brake cable 38 and is located between the front end portion 74 of the cam lever 52 and the holding portion 75 of the cable support member 42 (distance Lc). Thus, a clamping plate portion 82 to which the clamping force of the bolt 64 is applied is formed, an overhanging plate portion 83 extending along the head of the bolt 64 is formed continuously with the tightening plate portion 82, and a flat plate is formed continuously with the overhanging plate portion 83. A portion 84 is formed.

  The flat plate portion 84 is formed at a height substantially coinciding with the position of the head 76 of the bolt 64, is substantially parallel to the parking brake cable 38, and is in contact with the outer peripheral surface 45 of the cylinder 31B in a tangential manner. It is extended and has a flat surface 72.

  The cover member 81 is fastened to the cable support member 42, but may be fixed to the cable support member 42 by welding or may be formed integrally with the cable support member 42. By forming the cover member 81 integrally, the assembly time of the cover member 81 can be saved.

  The disc brake device 11B of the second embodiment exhibits the same effect as the disc brake device 11 of the first embodiment. That is, there is an advantage that it is possible to prevent snow, ice and mud from adhering between the parking brake cable 38 of the parking brake device 14 and the caliper 23.

  The disc brake device for vehicles of the present invention is suitable for a rear wheel.

1 is a perspective view of a vehicle disk brake device (first embodiment) according to the present invention. FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1. FIG. 3 is a sectional view taken along line 3-3 in FIG. 1. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is description of the outer surface shape of the cylinder with which the disc brake device for vehicles (1st Embodiment) of this invention is provided. It is a figure explaining the relationship between the disc brake device for vehicles of the present invention (first embodiment) and the adhesion of snow. It is a 2nd embodiment figure. It is a figure explaining the prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Vehicle disc brake device, 13 ... Disc rotor, 14 ... Parking brake device, 23 ... Caliper, 25 ... Hydraulic brake mechanism, 38 ... Parking brake cable, 42 ... Cable support member, 46 ... Fastening boss part, 47 ... Caliper 51 ... End of parking brake cable (connection end), 52 ... Cam lever, 64 ... Bolt, 72 ... Flat surface, 74 ... Tip part, 75 ... Holding part, 76 ... Head.

Claims (2)

Pads that press both sides of the disk rotor that rotates with the wheels are connected, and includes a hydraulic brake mechanism provided in a U-shaped caliper, and a parking brake device,
The parking brake device includes a parking brake cable, a cam lever that holds the end of the parking brake cable at the tip, a cable support member that holds the parking brake cable, and a cable support member that is fastened with bolts. And a vehicle disc brake device comprising a fastening boss portion bulging from the caliper,
The outer surface of the caliper facing the parking brake cable is parallel to the axis of the parking brake cable between the tip of the cam lever and the holding portion of the cable support member, and the position of the head of the bolt A disc brake device for a vehicle, wherein the disc brake device is formed on a flat surface having substantially the same height. Pads that press both sides of the disk rotor that rotates with the wheels are connected, and includes a hydraulic brake mechanism provided in a U-shaped caliper, and a parking brake device,
The parking brake device includes a parking brake cable, a cam lever that holds the end of the parking brake cable at a tip, a cable support member that holds the parking brake cable, and a cable support member. In the vehicle disc brake device comprising a fastening boss portion bulging from the caliper,
A flat surface having a height that is parallel to the axis of the parking brake cable and substantially coincides with the position of the head of the bolt is formed so as to cover the outer peripheral surface of the cylinder facing the parking brake cable. A vehicle disc brake device comprising a cover member fastened by the bolt.

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