Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D65/00—Parts or details
  • F16D65/02—Braking members; Mounting thereof
  • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
  • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
  • F16D65/095—Pivots or supporting members therefor
  • F16D65/097—Resilient means interposed between pads and supporting members or other brake parts
  • F16D65/0973—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces
  • F16D65/0974—Resilient means interposed between pads and supporting members or other brake parts not subjected to brake forces acting on or in the vicinity of the pad rim in a direction substantially transverse to the brake disc axis
  • F16D65/0975—Springs made from wire
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D65/00—Parts or details
  • F16D65/02—Braking members; Mounting thereof
  • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
  • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
  • F16D65/095—Pivots or supporting members therefor
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
  • F16D65/00—Parts or details
  • F16D65/02—Braking members; Mounting thereof
  • F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
  • F16D65/092—Bands, shoes or pads; Pivots or supporting members therefor for axially-engaging brakes, e.g. disc brakes
  • F16D65/095—Pivots or supporting members therefor
  • F16D65/097—Resilient means interposed between pads and supporting members or other brake parts
  • F16D65/0972—Resilient means interposed between pads and supporting members or other brake parts transmitting brake reaction force, e.g. elements interposed between torque support plate and pad

Definitions

• This invention relates to a caliper-type disc brake.
• the invention relates to a spring capable, both, of reducing rattle and retracting the brake pads.
• Pad rattle in a caliper disc brake assembly has been addressed by one of three methods.
• the brake pads are secured to the brake piston or to the caliper body.
• the clearances between the pad and the support bracket are reduced or dampening material is placed in the clearances.
• a special pad clip has been provided to load the pad in a tangential direction.
• DTN disk thickness variation
• a spring is installed between the opposed brake pads in such a manner that the spring applies to the pads a force that is directed in both the tangential and radial directions.
• tangential refers to the direction transverse to the direction of caliper piston movement
• radial refers to the direction of caliper piston movement.
• each end of the spring engages a respective hole in the backing plate for a pad.
• the springs are shaped to apply tangential and radial forces to the pads and, the preferred embodiment uses two S- shaped springs.
• the tangential force applied by the springs according to the invention increase the slide load of the pad assemblies and the radial force retracts the pads away from the rotor during non-braking.
• a disc brake is illustrated with rotor 2 and opposed disc brake pads 4 on either side thereof.
• the disc brake pads 4 are mounted on respective backing plates 8, which include ears 10 or other structure for engaging a groove 12 in caliper, which is only partially illustrated in the figure.
• the ears slide in the groove 12 in known fashion as a result of the braking forces applied by a caliper piston (not illustrated).
• the engagement between the ears 10 and the caliper groove 12 restricts the motion of the pads 4 to be in the radial direction illustrated by the arrow 14.
• a retraction force is usually necessary to apply a retraction force to the pads to provide a gap between the pads 4 and the rotor 8 when the braking force is released to prevent drag on the rotor. It is also desirable to apply a force to the pads that will reduce the vibrations of the pad, or "rattle.”
• a single spring is arranged to apply both a retraction force and a force that reduces rattle.
• two S-shaped springs 6 are preferably applied between the opposed pads by engaging the ends of the springs in holes 16 in the backing plates of the pads. It will be appreciated that the springs apply tangential forces to the pads to urge the pad ears into the channel 12 and reduce rattle and also apply radial forces in the direction of the channel 12 to retract the pads upon release of braking force.
• both tangential and radial forces by the springs 6 is the result of the transverse alignment of the springs with respect to the direction of the groove 12 in the caliper.
• the holes 16 in opposed backing plates 8 are not aligned in the direction of movement of the backing plates, illustrated by arrow 14. Instead, the holes receiving a single spring are shifted in the tangential direction such that they lie on a line as shown at 18 in the figure.
• the springs 6 are compressed such that the restoring forces applied to the backing plates by the springs 6 are applied in the direction of the line 18. Because these forces are transverse to the radial direction, they contain both radial and tangential components.
• the tangential force applied by the springs to each baldng plate is the tangential component of the line 18 connecting the two holes in each respective pad, and the radial force is the radial component of the line.
• Arrows 20 and 20' illustrate the tangential components
• arrows 22 and 22' illustrate the radial components.
• the radial distance between the pads in the rest position is shortened. This means that the angle of the line 18 connecting the holes 16 changes as the pads wear, and this changes the proportion of the force applied by the springs that is radial and tangential for springs such as those illustrated. As the pad lining wears, the spring must be able to account for the natural decrease in the radial force and the increase in the tangential force caused by a change in the relative positions of the holes 16. Applicants have found that a spring of known spring material having, for example, a diameter of 2mm, and in the S-shape is effective.
• the S-shape of the spring as shown has been found advantageous because the curves can accommodate the changes.
• other configurations including a N- shape or coiled shape are possible.
• the holes 16 are angled to facilitate assembly of the springs to the backing plates.
• Other configurations are possible, however.
• the holes may extend in the direction of caliper movement, or a completely different attachment mechanism, such as a clip or other fastener, may be employed.
• two springs in the same orientation are used.
• the respective tangential and radial components of the two springs are collinear and add to provide increased forces.
• Arrangements other than the symmetrical arrangement shown may have utility, however.
• the element 6 has been referred to herein as a spring. Such is intended to refer to a variety of resilient elements that resiliently resist application of forces to and try to return to their original shape. While the springs are shown acting in compression, it is possible to arrange the springs to operate in tension.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Braking Arrangements (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=22908752

Family Applications (1)

Country Status (4)

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Citations (4)

Family Cites Families (9)

• 2001
  • 2001-10-18 EP EP01979238A patent/EP1336055A4/de not_active Withdrawn
  • 2001-10-18 JP JP2002536233A patent/JP2004511738A/ja active Pending
  • 2001-10-18 AU AU2002211223A patent/AU2002211223A1/en not_active Abandoned
  • 2001-10-18 WO PCT/US2001/027775 patent/WO2002033282A1/en not_active Application Discontinuation

Patent Citations (4)

Non-Patent Citations (1)

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