JP6333020B2 - Disc brake device - Google Patents

Description

  The present invention relates to a disc brake device provided with a ball ramp mechanism, which can adjust a gap between a friction pad and a disc rotor.

Japanese Utility Model Publication No.59-10432 Japanese Utility Model Publication No. 61-18262

  For example, Patent Documents 1 and 2 disclose configurations in which gap adjustment is performed manually. And in patent document 1, the rod (17) provided with the adjustment screw part (33) is screwed into the screw part (35) which penetrates a nut member (12). In Patent Document 2, the gap adjusting bolt (36) is screwed into a female screw hole (29a) penetrating the sliding cam plate (29).

  As described above, in Patent Documents 1 and 2, it is necessary to form through holes (screw holes) in parts constituting the ball ramp portion such as a nut member and a sliding cam plate, which takes time for processing. In addition, since the rod and the gap adjusting bolt are arranged inside the nut member and the sliding cam plate, it is difficult to reduce the size of the configuration of the ball ramp portion.

  Accordingly, the present invention is intended to solve the above-described problems, and a disc brake device that can save the labor of processing as in the prior art and can reduce the size of the configuration of the ball ramp portion. I want to get it.

In order to solve the above-described problems, the present invention includes a cylinder hole on the working part side of a caliper body disposed across the disk rotor, and the shaft part and the disk rotor of the shaft part are provided in the cylinder hole. A shaft provided with a flange portion formed on the side, a plate assembled at a position opposite to the disk rotor side of the flange portion, and a ball member assembled between the plate and the flange portion; There is to assume the disc brake device provided with a ball Ruranpu mechanism consisting disposed.

Then, with the adjust member having a through hole to allow through the shaft, 該A just member, the cylinder bore bottom portion of the caliper body in contact with the back of the counter-disc rotor side of the plates, cylinders The shaft is attached so as to be adjustable in the axial direction of the hole, and the shaft can be advanced by advancing the adjusting member toward the disk rotor.

  Further, the adjustment member has a threaded portion formed on the outer peripheral surface, and the threaded portion is screwed to the bottom of the cylinder hole of the caliper body so that the adjusting member can be rotated in one direction to advance. May be. With this configuration, the position of the adjustment member can be adjusted with a simple configuration.

  By configuring the present invention as described above, the ball ramp mechanism can be advanced by advancing the adjustment member toward the disk rotor. Therefore, there is no need to provide a screw hole in the shaft constituting the ball ramp mechanism. Thus, it is possible to save the labor of such processing, and it is possible to improve productivity. Further, since it is not necessary to arrange a position adjusting component or the like inside the shaft, it is possible to reduce the size of the ball ramp mechanism.

Sectional drawing which shows Example 1 of this invention. Sectional drawing which shows Example 1 and is perpendicular | vertical to FIG.

  Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2. (1) is a caliper body of a disc brake. The caliper body (1) is arranged on both sides of a disc rotor (2) as shown in FIG. The action part (3) and the reaction part (4) provided, and the bridge part (5) connecting the action part (3) and the reaction part (4) across the disk rotor (2). is there. A cylinder hole (6) is formed in the disk rotor (2) on the working part (3) side.

  A piston (7) having a cup-shaped cross section is arranged on the disk rotor (2) side of the cylinder hole (6) with the bottom portion on the disk rotor (2) side. A shaft (11) constituting the ball ramp mechanism (10) of the present embodiment is provided on the opening (8) side of the piston (7). The shaft (11) includes a shaft portion (13) and a disk-shaped flange portion (12) formed to protrude in the radial direction on the piston (7) side of the shaft portion (13). The surface of the flange portion (12) on the disk rotor (2) side is disposed in contact with the opening (8) of the piston (7).

  Further, a plate (14) constituting the ball ramp mechanism (10) of the present embodiment is assembled with the shaft (11) at a position facing the non-disc rotor (2) side of the flange portion (12). That is, the plate (14) has an insertion hole (15) in the center, and the shaft portion (13) of the shaft (11) is slidably inserted into the insertion hole (15). (14) is assembled to the shaft (11). The caliper body (1) has a fixing plate (20) for closing the opening (18) on the side opposite to the disk rotor (2) of the cylinder hole (6) by bolts. ) Forms the bottom (16) of the cylinder hole (6).

  Further, the flange portion (12) and the plate (14) of the shaft (11) arranged as described above are provided with ramp grooves (21) on the inner surfaces facing each other as shown in FIG. ) Are formed and arranged at respective opposing positions of the flange portion (12) and the plate (14). Further, the ball member (17) is accommodated in the opposed ramp groove (21) formed in the flange portion (12) and the plate (14) as described above.

  Further, the flange portion (12) is urged toward the plate (14) so that the ball member (17) does not fall off from the ramp groove (21). That is, a flange (22) is formed on the outer periphery of the opening (8) of the piston (7), one end of the spring (23) is disposed in contact with the flange (22), and the other of the spring (23) is arranged. By placing the end in contact with the inner peripheral step (24) projecting from the inner wall of the cylinder hole (6) on the disk rotor (2) side, the flange portion is connected via the piston (7) by the spring (23). (12) is urged toward the plate (14).

  By urging the flange portion (12) toward the plate (14) as described above, the ball member (17) is connected to the ramp groove (21) of the flange portion (12) and the ramp groove (21) of the plate (14). Therefore, it is possible to prevent the ball member (17) from falling off from each ramp groove (21). When the brake is not operated, the ball member (17) is located at the deepest portion of each ramp groove (21).

  Further, a friction pad (25) is disposed on the bottom side of the piston (7), and the reaction part (4) of the caliper body (1) is also connected to the friction pad (25) on the action part (3) side. A friction pad (26) formed in the same manner is fixedly arranged facing the friction pad (25) on the side of the action part (3). As a result, as shown in FIG. 1, the disk rotor (2) is positioned between the friction pad (26) on the reaction part (4) side and the friction pad (25) on the action part (3) side. The pair of friction pads (25) and (26) can slide on the hanger pins (27) installed between the action part (3) side and the reaction part (4) side of the caliper body (1). Is engaged.

  Then, an engagement hole (28) is formed in the center of the fixed plate (20), a thread groove is provided in the engagement hole (28), and a thread portion (38) that can be screwed into the thread groove is provided. It is provided on the outer periphery of an adjustment member (30) formed in a cylindrical shape. Then, the adjusting member (30) is screwed into the engaging hole (28) of the fixing plate (20), and the adjusting member (30) is assembled to the fixing plate (20), and is placed in contact with the back side of the plate (14). doing.

  The adjustment member (30) has a through hole (31) formed in the axial direction, and the shaft portion (13) of the shaft (11) is slidably disposed in the through hole (31). doing. Further, in a state where the screw portion (38) formed on the outer periphery of the adjustment member (30) is screwed to the fixing plate (20), the nut (32) is screwed from the back side of the fixing plate (20). The adjusting member (30) is non-rotatably fixed to the fixing plate (20) by being screwed onto and tightening. In addition, one end (34) of the rotating arm (33) is fixedly disposed at the other end (37) of the shaft (11), and the rotating arm (33) and the shaft (11) are integrally formed. It is assembled to rotate. On the other hand, a brake wire (not shown) is connected to the other end (35) of the rotating arm (33), and the brake wire is operated by a brake pedal such as a brake pedal or a brake lever operated by the driver. It is connected to a child (not shown).

  The case where the disc brake is braked in the configuration as described above will be described below. First, a brake wire is attached by a brake operator (not shown) against a biasing force of a return spring (not shown) provided between the rotating arm (33) and the caliper body (1). By pulling, the rotating arm (33) rotates in one direction. As the rotating arm (33) rotates, the shaft (11) rotates in the same direction together with the rotating arm (33).

  As described above, the shaft (11) and the rotating arm (33) are both fixed and simultaneously rotated, but the shaft portion (13) is inserted into the through hole (31) of the adjusting member (30) and the insertion hole of the plate (14). (15) is slidably assembled with the adjusting member (30) and is fixed to the fixed plate (20) so that it cannot rotate, so that even if the shaft (11) is rotated, the plate (14) The adjustment member (30) does not rotate. Therefore, the flange portion (12) of the shaft (11) rotates with respect to the plate (14).

  Therefore, due to the rotation of the plate (14), the phase of the ramp groove (21) of the plate (14) and the ramp groove (21) of the flange portion (12) shifted from each other before starting braking. The ball member (17) that was at the deepest position of the ramp groove (21) is moved to a shallow position of the ramp groove (21), and the distance between the plate (14) and the flange portion (12) is increased. Become. At this time, since the plate (14) is in contact with the adjustment member (30) as described above, the shaft (11) cannot be slid away from the flange portion (12). It will slide to the side.

  Since the piston (7) is urged by the sliding of the shaft (11) and slides toward the disk rotor (2), the friction on the acting part (3) side disposed in contact with the piston (7) The pad (25) slides toward the disk rotor (2) and is pressed against the surface of the disk rotor (2). The caliper body (1) moves in a direction opposite to the moving direction of the piston (7) due to the reaction force accompanying the movement of the action part (3), and the reaction part is moved by the movement of the caliper body (1). The friction pad (26) on the (4) side moves to the disk rotor (2) side and comes into pressure contact with the side surface on the reaction portion (4) side of the disk rotor (2). As a result, the pair of friction pads (25) and (26) respectively provided on the action part (3) side and the reaction part (4) side are pressed against both surfaces of the disk rotor (2) as shown in FIG. Braking is performed.

  Next, the release of braking will be described below. First, the brake wire pulling is released by operating a brake operator (not shown), so that the brake arm (33) and the caliper body (1) are separated. Due to the urging force of the provided return spring, the rotating arm (33) is rotated in the opposite direction to that during braking, and is restored to the original position before the start of braking. As a result, the shaft (11) rotates in the direction opposite to that during braking and returns to the position before the start of braking, and the ramp groove (21) of the flange (12) of the shaft (11) and the ramp of the plate (14) The groove (21) is restored to the opposing position, which is the non-braking position, and the ball member (17) is returned to the deepest position of each ramp groove (21).

  With the return of the ball member (17), the piston (7) slides toward the cylinder hole (6) bottom (16) side by the urging force of the spring (23), and is separated from the disc rotor (2). Restore to its original position. Accordingly, the pressure on the disk rotor (2) by the friction pad (25) that has been in contact with the piston (7) is released. Further, due to the reaction force accompanying the movement of the action part (3) side as described above, the caliper body (1) moves and the reaction part (4) side moves to the anti-disc rotor (2) side, and the reaction part (4) The pressure on the disk rotor (2) side by the side friction pad (26) is also released. Thereby, the braking of the disc brake is released.

  Further, when the friction pads (25) and (26) are worn due to use, the distance between the friction pads (25) and (26) and the disk rotor (2) is wider than before the wear. Therefore, when the friction pads (25) and (26) are worn, it is necessary to return the space between the friction pads (25) and (26) and the disk rotor (2) to the state before the wear. ) (26) must be moved to the disk rotor (2) side to adjust the position.

  The position adjustment of the friction pads (25) and (26) will be described below. First, the nut (32) screwed and fastened to the adjustment member (30) is loosened to adjust the adjustment member (30) to the fixing plate (20). The adjustment member (30) is rotated in one direction with respect to the fixed plate (20). As a result, the adjustment member (30) moves forward while moving to the disk rotor (2) side, and the adjustment member (30) advances toward the disk rotor (2) side to move to the tip surface of the adjustment member (30). The abutting plate (14) moves forward without rotating to the disk rotor (2) side.

  As the plate (14) advances toward the disk rotor (2), the flange (12) of the shaft (11) is moved together with the ball member (17) via the ball member (17) to the disk rotor (2) side. Is pushed. As a result, the ball ramp mechanism (10) moves forward toward the disk rotor (2) as a whole.

  Thus, by advancing the entire ball ramp mechanism (10) toward the disk rotor (2), the piston (7) disposed in contact with the plate (14) moves forward toward the disk rotor (2). Then, the nut (32) is screwed and fastened to the adjustment member (30), and the position adjustment of the friction pads (25) and (26) is completed.

  As described above, since the ball ramp mechanism (10) can be advanced by advancing the adjustment member (30), there is no need to provide a screw hole in the shaft (11) constituting the ball ramp mechanism (10). It becomes possible to save the trouble of the processing like the conventional one, and it can aim at the improvement of productivity. Further, since it is not necessary to arrange a position adjusting component or the like inside the shaft (11), the ball ramp mechanism (10) can be reduced in size.

DESCRIPTION OF SYMBOLS 1 Caliper body 6 Cylinder hole 10 Ball ramp mechanism 11 Shaft 14 Plate 16 Bottom part 17 Ball member 30 Adjustment member 31 Through-hole 38 Screw part

Claims (2)

A shaft provided with a cylinder hole on the working part side of the caliper body disposed across the disk rotor, and a shaft part and a flange part formed on the disk rotor side of the shaft part in the cylinder hole. When a disk having a plate assembled to the opposing position of the counter-disc rotor side of the flange portion, the ball Ruranpu mechanism and a ball member that is assembled, which are arranged in between said plate and said flange portion Brake device,
An adjustment member provided with a through-hole capable of penetrating the shaft;
該A Just member, the cylinder bore bottom portion of the caliper body in contact with the back of the counter-disc rotor side of the plates, adjustably with mounted position in the axial direction of the cylinder bore,
A disc brake device characterized in that the shaft can be advanced by advancing the adjusting member toward the disc rotor. The adjusting member has a threaded portion formed on an outer peripheral surface, and the threaded portion is screwed to a bottom of the cylinder hole of the caliper body so that the adjusting member can be rotated in one direction to advance. The disc brake device according to claim 1 .