Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
  • B62L1/00—Brakes; Arrangements thereof
  • B62L1/02—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements
  • B62L1/06—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged
  • B62L1/10—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis
  • B62L1/14—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis the elements being mounted on levers pivotable about different axes
  • B62L1/16—Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis the elements being mounted on levers pivotable about different axes the axes being located intermediate the ends of the levers

Definitions

• the invention relates to a center pull rim brake, comprising two two-armed, spring-loaded, pivotably mounted on a support plate
• Brake bracket with intersecting actuating arms further containing a central pull cable, a cable support provided with a clamping screw for clamping the pull cable to the cable support in an adjustable effective pull length, and containing a connection between the cable support and the free ends of the brake bracket actuating arms.
• a center pull rim brake for a bicycle (DE-OS 26 39 008) the lower end of the pull cable is adjustably attached to the free end of a brake lever actuating arm in its entire length.
• One end of a rigid tension member is articulated to the free end of the other brake bracket actuating arm, the other end of which comprises the pull cable in a gripper-like configuration.
• the end of the tension member which is connected to the free end of the one brake arm actuating arm is formed with an elongated hole and carries a cam disk with devices for adjusting the brake arm arms carrying the brake shoes relative to the rim of a bicycle.
• this known rim brake has the disadvantage that it always has the tendency to attract asymmetrically.
• OMPI In a center pull rim brake of the type mentioned at the outset, the effective length of the lower end of the central pull cable is clamped to the cable carrier with its adjustable length.
• the lower part of the cable carrier is designed in the form of a hook, in which a short connecting cable connecting the free ends of the two brake bracket actuating arms is loosely suspended.
• the assembly proves to be cumbersome in that the cable carrier must also be held with one hand when loosening or tightening the clamping screw if the effective cable length is to be set.
• the invention is therefore based on the object of improving a center pull rim brake of the type mentioned in such a way that there is a simplification of the assembly, in particular a simpler adjustment of the pull cable on the cable carrier.
• connection between the cable carrier and the free ends of the brake bracket actuating arms is formed by two tie rods of the same length, which with the cable carrier and the free ends of the
• Brake bracket actuating arms are pivotally connected and have a stop surface which comes to a stop with a counter surface on the cable carrier when the brake is open.
• FIG. 1 shows a front view of the center pull rim brake according to the invention
• FIG. 2 shows a rear view of the center pull rim brake according to FIG. 1, the rim brake being in its release position;
• FIG. 3 shows a partial view (section III) of the rim brake according to FIG. 2, to illustrate the state of the cable carrier with the associated
• OMP associated tie rod ends when the rim brake is applied when the rim brake is applied.
• the center pull rim brake 1 illustrated in the drawing contains, as essential parts, two conventionally designed, two-armed brake brackets 2 and 3, which are pivotably mounted on a support plate 4 and are under the spring force of springs (not shown in more detail), and a central one Pull cable 5, the lower end of which - here illustrated - can be clamped in its effective pull length with the aid of a clamping screw 6 on a cable carrier 7, as well as a connection between the cable carrier and the brake brackets 2, 3, which will be explained in more detail.
• the brake brackets 2 7 3 carry brake pads (not shown) at their lower ends 2a and 3a in a conventional manner, while their upper arms are designed as intersecting actuating arms 2b and 3b.
• the connection between the brake brackets 2, 3 and the corresponding ends of the support plate 4 is formed by conventional screws 8 and 9, which at the same time form the hinge axes for the swivel mounting of the brake bracket.
• each tie rod 10 is designed as eyelet-widened bearing ends with a bearing bore 10a ', 10b 1 and 11a 1 , 11b' through which the associated bearing journals 12 reach through, which are formed and attached in the usual manner approximately rivet-shaped.
• Bearing end 10a or 11a of each tie rod 10, 11 is formed on a stop surface 13 or 14, which runs straight or tangent and comes to a stop with a counter surface on the bearing bracket when the brake is open.
• the cable carrier 7 has a symmetrical triangular or trapezoidal shape in the front or rear view; 1 to 3, the trapezoidal shape is preferred.
• the cable carrier 7 is also made of a flat plate made of solid material, preferably metal (aluminum alloy or the like), but a correspondingly strong plastic material is also conceivable in the area of its vertical axis of symmetry, which coincides with the vertical axis of symmetry 17 of the rim brake 1 ,
• the cable carrier 7 has a groove 18 which is dimensioned so large that the train cable 5 can be received flush therein.
• the cable carrier 7 points to the rear (see FIG. and 3) open cutouts 19, 20 provided symmetrically on both sides of its vertical axis of symmetry 17, the depth of which corresponds approximately to the thickness of the tie rod bearing ends 10a and 11a and which have a substantially circular-shaped inner circumferential guide surface which corresponds to the outer circumference of said bearing ends 10a and 11a are adapted so that these bearing ends can be received flush in the associated cutouts 19 and 20, respectively.
• the counter surface 15 or, respectively, cooperating with the stop surface 13 or 14 de of the associated tie rod bearing end 10a or 11a . 16 molded.
• the surface areas 15, 16 each form the upper, outward-pointing free end of the otherwise circular-arc-shaped inner circumference guide surface of each cutout 19, 20.
• the pull cable 5 is to be mounted on the cable carrier 7 and its effective pull length is to be set, then this will take place in the normal, ie not tightened, position of the rim brake 1. Due to the provided rigid tie rods 10, 11, the arrangement of stop surfaces 13, 14 on these tie rods and the formation of counter surfaces 15 and 16 on the cable carrier 7, it is not necessary to loosen and tighten the nut of the clamping screw 6, the cable carrier 7 especially to hold on to. Rather, one hand is free to pull the pull cable 5 in the required effective pull length compared to the cable Adjust and hold carrier 7 so that the clamping screw 6 is then tightened and the pull cable 5 is clamped in the required train length.
• the described design and shape of the cable carrier also contributes to a good appearance and good function, so that practically hardly disruptive fastening parts protrude from the cable carrier 7. Finally, the rim brake 1 according to the invention also gains considerably stability compared to known designs.

Landscapes

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

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6144190

Family Applications (1)

Country Status (6)

Families Citing this family (10)

Citations (5)

Family Cites Families (5)

• 1981
  • 1981-10-15 DE DE19813141004 patent/DE3141004A1/de not_active Withdrawn
• 1982
  • 1982-10-12 DE DE8282903144T patent/DE3268989D1/de not_active Expired
  • 1982-10-12 EP EP82903144A patent/EP0090838B1/de not_active Expired
  • 1982-10-12 JP JP57503157A patent/JPS58501427A/ja active Granted
  • 1982-10-12 WO PCT/EP1982/000226 patent/WO1983001423A1/en active IP Right Grant
  • 1982-10-12 US US06/495,337 patent/US4552251A/en not_active Expired - Fee Related
  • 1982-10-14 IT IT12636/82A patent/IT1157761B/it active

Patent Citations (5)

Non-Patent Citations (1)

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