WO2007072657A1

WO2007072657A1 - Brake caliper

Info

Publication number: WO2007072657A1
Application number: PCT/JP2006/323638
Authority: WO
Inventors: Kouji Uno
Original assignee: Kouji Uno
Priority date: 2005-12-19
Filing date: 2006-11-21
Publication date: 2007-06-28
Also published as: JP2007168757A; TW200734239A; JP3863552B1

Abstract

A brake caliper where a brake wire can be laid with sufficient margin space and that exhibits braking force efficiently. To obtain such a brake caliper without reinforcement on the bicycle frame side, a simply constructed lever having a brake arm extended along a tire is used.

Description

Description Brake carrier

S field

The present invention relates to a brake caliper that is driven by a brake wire and presses a brake shoe against a rim side of a wheel.

Background art

Bicycles often have mounting holes for attaching brake calipers or mudguards to front forks, seat stays or chain stays. In addition to the mounting holes, a pair of left and right shaft pins for mounting the brake caliper may be provided on the seat stay or chain stay on the front fork fork leg.

These brake caliper mounting holes and shaft pins have a central axis approximately parallel to the direction of the tangent to the rimside rotation track starting from the brake shoe pressure contact center point to the rimside. The central axis of the rotating part of the brake caliper is provided parallel to the central axis of the shaft pin. (See Patent Document 1) Patent Document 1. Japanese Patent Application Laid-Open No. 9-3 2 8 0 8 9

Disclosure of the invention

The problem that the invention solves

In the brake caliper, in order to reduce the transmission opening caused by the frictional force in the wiring path of the brake wire that transmits the force input to the brake lever to the brake caliper, the bending radius of the brake wire is greatly increased. It is desirable that wiring be performed so that the total bending angle is small.

In addition, the brake wire connected to the brake arm will not cause the brake arm's left / right balance to be disrupted by the force acting in the way of the brake arm's movement, and the brake wire will not be dragged on one side. Loose wiring is desirable. '

However, if a brake arm extended in the outer circumference direction of the wheel is used in order to obtain sufficient braking force, the distance between the handle to which the brake lever is attached and the part where the brake wire is connected to the brake arm will be reduced. It becomes difficult to wire the brake wires smoothly and smoothly due to the bending radius.

Moreover, if the fulcrum part of the lever of the brake arm is placed on the seat stay or the chain stay on the fork leg so that the brake arm does not have to extend in the outer peripheral direction of the wheel, the carbon fiber is sufficiently light and highly elastic. Fork legs, seat stays, or chain stays made of steel, etc., a large amount of reinforcement is required to catch the strong force applied to the fulcrum, reducing the weight and shock absorption of the front forks, seat stays, or chain stays. Will be sacrificed.

In addition, the fork legs and seat stays that are open laterally from the rim side If the fulcrum of the brake arm is placed on the chain or chain stay, the force that pushes and pulls the rim size toward the outer circumference of the wheel is distributed during one press of the brake shoe, and the brake shoe that is directly related to the braking force is The force that pushes the door vertically decreases.

Means for solving the problem

A bicycle brake caliper according to a first aspect of the invention is a braking device for braking a bicycle, as shown in FIGS. 1 and 2, a pair of left and right central axes 16 comprising a first central axis and a second central axis. And has a base member 10 that can be firmly attached to a mounting hole centered on the central axis 12.

Further, as shown in FIG. 2, the first central axis and the second central axis are set in the direction perpendicular to a plane including all of the rim side 15 to which one of the pair of left and right brake shoes 6 is pressed. The first plane line and the second plane line projected onto the plane are within the range of plus or minus 45 degrees perpendicular to the center axis line 12 of the mounting hole. Also, the pair of left and right brake arms 8 is extended along the tire 3 with the pair of left and right central axes 16 as the fulcrum in the lever so that the front ends of the pair of left and right brake arms 8 act as a force point in the lever. Connect the brake outer 1 to one of the front ends of the left and right brake arms 8, and fix the brake inner 4 to the other. As an action point in the lever, the pair of left and right brake shoes 6 are fixed to the inside of the pair of left and right brake arms 8, and the brake lever 19 installed on the handlebar 18 is gripped as shown in Fig. 3. The inner wire 4 is pulled, and the pair of left and right brake shoes 6 are pressed against the rim side 15 to brake the bicycle. Further, when the grip of the brake lever 19 is stopped, the pair of left and right brake shoes 6 are separated from the rim side 15 by the panel member 7 that works in the direction in which the front ends of the pair of left and right brake arms 8 open.

The bicycle brake caliper according to the more specific plan 1 is the bicycle brake caliper X of the invention 1. The bicycle brake caliper X has a pair of left and right shaft pins 9 centered on the first central axis and the second central axis, respectively. The base member 10 is fixedly installed, and a pair of left and right shaft pins 9 respectively rotatably supports the rear end portions of the pair of left and right brake arms 8.

More specifically, the bicycle brake caliper according to the plan 2 is the same as the bicycle brake caliper described in 1), in which the first central axis and the second central axis are concentric axes, and these axes are the center. The third shaft pin is fixedly installed on the base base member 10, and the third shaft pin rotatably supports the rear end portions of the pair of left and right brake arms 8. More specifically, the bicycle brake caliper according to the plan 3 is based on the pair of left and right shaft pins 9 centered on the first central axis and the second central axis in the bicycle brake caliper of the invention 1, respectively. The pair of left and right shaft pins 9 are fixedly installed at the rear end portions of the pair of left and right brake arms 8, respectively.

More specifically, the bicycle brake carrier according to the plan 4 is a bicycle brake carrier according to any one of the invention 1 and the plan 1 to the plan 3, wherein the front end portions of the brake outer 1 and the pair of left and right brake arms 8 are provided. In order to connect one of the two, a connecting member 2 rotatably attached to one of the front end portions of the pair of left and right brake arms 8 is used. '

The invention's effect As described above, according to the present invention, the brake wire 1 composed of the brake outer 1 and the brake inner 4 is compared without arranging the fulcrum portion of the lever on the fork leg 11, the seat stay 20 or the chain stay 21. With a large bending radius, it is possible to wire smoothly without increasing the total bending angle. In addition, since it is easy to bring the left and right widths of the pair of left and right central axis lines 16 close to the left and right widths of the rim side 15, braking force can be obtained efficiently.

Furthermore, according to plan 2, the pair of left and right shaft pins 9 can be combined into one, so that the cost can be reduced as the structure is simplified.

Further, according to Proposal 3, when the base member 10 is supported at both ends by sandwiching the rear ends of the pair of left and right brake arms 8, the pair of left and right caused by the rattling of the portion that rotatably supports the shaft pin 9 The backlash of the arm 8 can be made relatively small. Furthermore, according to Plan 4, the connecting member 2 works so as to alleviate the influence of the brake outer 1 that is affected by the movement of the handlebar 1 8, so the left-right balance of the pair of left and right brake arms 8 is It's hard to be affected by the disturbance caused by 1.

Brief Description of Drawings

Figure 1. Example 1 as seen from the top of the bicycle

Figure 2. Example 1 as seen from the side of a bicycle

Figure 3. Example 1 mounted for front wheel braking

Explanation of symbols

1. Brake outer

2. Connecting member

2 a, 1 2. Center axis

2 b. Rivet

2 c. Connecting member made of stainless steel plate

3. Tire

4. Inner Wire

5. Inner fixing bolt

6. A pair of left and right brakes

6 a. Brake shoe pressure contact center point

7. Spring member

7 a.

7 b. One end

8. A pair of left and right brake arms

8 a. Metal bush with flange

8 b. Slotted hole

9. Shaft pin

1 0. Base material

1 0 a. Embedded bolt

1 1. Fork Leg 1 3. Head tube

1 4. Shut fixing bolt

1 5. Rimside

1 6. A pair of left and right central axes

1 7. Nut with lock

1 8. Non-noreno

1 9. One

20. The Tosty

2 1-Chainstay

2 2. Stem

BEST MODE FOR CARRYING OUT THE INVENTION

Example 1.

In Fig. 1 and Fig. 2, the base member 10 is cut by aluminum forging, then embedded and embedded port 1 Oa is embedded, and an embedded bolt 1 Oa is inserted into the mounting hole of the front fork 1 7 is fixed. Also, a flanged metal bush 8a is press-fitted into the pair of left and right central axes 16 of the rear end of the pair of left and right brake arms 8 made of forged aluminum, and press-fitted into the base member 10 It is possible to rotate with the shaft pin 9 made. Further, the spring member 7 having one end 7b press-fitted into the base member 10 is a stainless steel bar spring for spring, and the other end 7a is pressed against the inside of the pair of left and right brake arms 8. In addition, the portion that is pressed against the rim side 15 of the pair of left and right brake shoes 6 is made of rubber, and the length provided on the pair of left and right brake arms 8 against an iron nut イン inserted into the rubber. Stainless steel fixing bolts 14 inserted into the holes 8b are screwed in. The brake outer 1 is connected to the metal bush press-fitted into one front end of the pair of left and right brake arms 8 via a connecting member 2c made of stainless steel so that it can be rotated by a stainless steel rivet 2b. The brake inner 4 is connected to the other front end by a stainless inner fixing bolt 5.

Claims

The scope of the claims

1. A brake caliper that is attached to a mounting hole provided on a bicycle front fork, a seat stay or a chain stay, and is driven by a brake wire to press a pair of left and right brake shoes against the wheel rim side. A base member on which the first central axis and the second central axis are installed and firmly attached to the mounting hole;

The rear end is supported rotatably about the first central axis and the second central axis, one of the front ends is connected to the outer wire of the brake wire, and the other is the inner wire of the brake wire. A pair of left and right brake arms fixed to the left and right pair of left and right brake arms;

A panel member that works in the direction in which the front ends of the pair of left and right brake arms open;

With

A first plane in which the first central axis and the second central axis are respectively projected onto the plane from a direction perpendicular to a plane including all of the rim sides to which one of the pair of left and right brake shoes is pressed. The upper line and the second plane upper line are in the range of plus or minus 45 degrees perpendicular to the central axis of the mounting hole.

Brake caliper for bicycles.