JP4368642B2 - Brake device for tricycle - Google Patents

Description

  The present invention relates to a brake device for a three-wheeled bicycle in which left and right rear wheel brake wires for operating respective brakes of rear two wheels are connected to a main rear wheel brake wire via a balance piece.

Since tricycles are less likely to fall, they are suitable for use by older people and pregnant women, and are also frequently used to carry relatively heavy loads. While the rear two wheels are stably grounded and run, the front frame that extends in the longitudinal direction of the vehicle body and supports the front wheels at the front part is used by tilting left and right for turning. In addition, in a normal two-wheeled motorcycle with two front and rear wheels, the stroke adjustment between the outer and inner brake wires in the front and rear brake wires is performed via a balance piece (equalizer: commonly referred to as “Yajirobe”) to adjust the front and rear braking force. A configuration has been proposed in which a difference in cost is absorbed and braking is performed appropriately by balancing the front and rear braking forces. On the other hand, a three-wheeled bicycle has been proposed in which a balance piece is interposed in order to balance the left and right braking force of the rear wheel (see, for example, Patent Document 1 below).
JP 2000-142533 A (paragraph 0008)

  As shown in FIG. 5, the left and right link arms 23, 23 are connected to the free ends of the left and right rear wheel brake bands 17A, 17B that reverse the tightening directions as shown in FIG. Inner portions 24 and 24 of left and right brake wires are connected to the operating ends of the link arms 23 and 23. The other ends of the inners 24, 24 are connected to a rear wheel brake operation lever 26 via an intermediate connector (equalizer) 25. As a result, the braking force is obtained in both directions by the brake bands 17A and 17B whose tightening directions are opposite in either direction (drive direction or coast direction).

  However, the connection of the left and right brake wire inners 24, 24 to the intermediate connector 25 is usually performed by locking of drum members fixed to the end portions of the inner 24. Therefore, the difference in the stroke adjustment allowance between the outer and the inner of the left and right brake wires is performed by adjusting the connecting portion with the link arm 23. The intermediate connector 25 is in a floating state with respect to the frame or the like due to its function. For this reason, the intermediate connector 25 sways during the adjustment of the length of the inner 24, which hinders the adjustment.

  Therefore, the present invention provides a three-wheeled bicycle brake device that can easily and accurately adjust the difference in stroke between the outer and inner brake wires in the left and right brake wires by solving the problems of the conventional three-wheeled bicycle brake device. For the purpose.

For this reason, the present invention provides a three-wheeled bicycle brake device in which left and right rear wheel brake wires for operating the respective brakes of the rear two wheels are connected to the main rear wheel brake wire via a balance piece, and A stopper having a flat plate surface that is substantially orthogonal to the rear wheel brake wire is fixed between the outer side of the wheel brake wire and the contact surface of the balance piece that comes into contact with the stopper, on the inner side in the width direction of each inner, The inner extension of the main rear wheel brake wire is formed with a plurality of protrusions formed on the outer side in the width direction at a position extending in the center hole of the stopper . Further, the present invention is characterized in that the stopper is fixed to the swing frame , and these are used as means for solving the problems.

According to the present invention, in the brake device for a three-wheeled bicycle in which left and right rear wheel brake wires for operating the respective brakes of the rear two wheels are connected to the main rear wheel brake wire via the balance piece, the balance piece and the left and right rear pieces are connected. A stopper having a flat plate surface that is substantially orthogonal to these rear wheel brake wires is fixed between the outer side of the wheel brake wires, and on the contact surface of the balance piece that contacts the stopper, on the inner side in the width direction of each inner, The inner extension of the main rear wheel brake wire with respect to the outer of the left and right rear wheel brake wires is formed by forming a plurality of protrusions formed on the outer side in the width direction of the position extending in the center hole of the stopper. This adjustment can be easily and accurately performed evenly with the balance piece in contact with the stopper. Further, a balance piece in contact with the plane of the stopper, on the can be adjusted more accurately and evenly, can be swung at the time the balance piece is slightly separated from the stopper, the left and right Absorption of the difference in stroke adjustment allowance between the outer and inner of the brake wire can be started immediately, and due to the presence of a gap caused by the formation of the protrusion, consistency with the edge of the insertion hole in the inner stopper The life of the inner is increased.

In addition , when the stopper is fixed to the swing frame, fingers can easily reach and the balance piece can be easily inspected and maintained .

  Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 show one embodiment of a braking device for a three-wheeled bicycle according to the present invention. FIG. 1 is a plan view of an essential part of the braking device for a three-wheeled bicycle according to the present invention. FIG. 3 is a rear perspective view of the attached three-wheeled bicycle, FIG. 3 is a plan view during braking operation when there is no difference in the stroke adjustment allowance between the outer and inner brakes in the left and right brakes, and FIG. 4 is a diagram of the outer and inner brakes in the left and right brakes. It is a top view during brake operation in case there is a difference in stroke adjustment allowance. As shown in FIG. 1, the basic configuration of the brake device for a three-wheeled bicycle according to the present invention is such that left and right rear wheel brake wires 7 and 8 for operating the respective brakes of the rear two wheels are connected to a main rear wheel via a balance piece 11. In the brake device for a three-wheeled bicycle connected to the brake wire 6, a flat plate surface is formed between the balance piece 11 and the outer brake wires 7B, 8B of the left and right rear wheel wires so as to be substantially orthogonal to the rear wheel brake wires 7, 8. The stopper 10 having the above is fixed.

  This will be described in detail below. As shown in FIG. 2, in the three-wheeled bicycle, the front frame 3 that extends in the longitudinal direction of the vehicle body and supports the front wheels at the front portion constitutes a swing frame, and the rear end portion of the front frame 3 is the left and right rear wheels. It is pivotally supported by a bearing member installed at the center of the rear horizontal frame that supports 1 and 2 so that it can swing left and right. Brakes 4 and 5 are mounted on the hubs of the left and right rear wheels 1 and 2, and the brakes 4 and 5 are configured by brake bands and the like not described in detail. ), The ends of the inner portions 7A and 8A of the brake wire are inserted and fixed. Rear end portions of the outer wires 7B and 8B of the brake wires 7 and 8 are configured to be adjustable by adjusting tools 15A and 15B provided at the front end portion of the brake body.

  As shown in FIG. 1, the inner ends 7 </ b> A and 8 </ b> A at the front end portions of the left and right rear wheel brake wires 7 and 8 are connected to the holes at both ends of the balance piece 11 by engaging the drum members 7 </ b> C and 8 </ b> C. . A stopper 10 having a flat surface substantially orthogonal to the rear wheel brake wires 7, 8 is fixed to the front frame 3 between the balance piece 11 and the outer 7 B, 8 B of the left and right rear wheel brake wires 7, 8. Established. Therefore, the inner wheels 7A and 8A of the rear wheel brake wires 7 and 8 are inserted through the pair of holes formed in the stopper 10, respectively.

  A saddle screw 12 is installed in front of a substantially middle portion of the drum members 7C and 8C of the balance piece 11, and an inner 6A at the rear end of the main rear wheel brake wire 6 connected to a rear wheel brake lever (not shown) is provided. Inserted and fixed. An outer 6B at the rear end portion of the main rear wheel brake wire 6 is attached to a brake wire fixing bracket 9 fixed to the front frame 3 so as to be adjustable by an adjusting member including a pair of nuts 13A and 13B. A plurality of protrusions 11A and 11B are formed on the contact surface of the balance piece 11 that contacts the stopper 10.

  Since it is configured as described above, when the inner wheel 6A of the main rear wheel brake 6 is pulled by operating the rear wheel brake lever installed on the handlebar (not shown), the balance piece 11 is moved from the state shown in FIG. Pull away from. At this time, as shown in FIG. 3, when there is no difference in the stroke adjustment allowance between the outer 7B, 8B and the inner 7A, 8A in the left and right brake wires 7, 8, the balance piece 11 is almost the same as the stopper 10. By being pulled in a parallel state, the inner 7A and 8A in the left and right rear wheel brake wires 7 and 8 are evenly pulled. As a result, the left and right brakes 4 and 5 (FIG. 2) operate almost simultaneously, and a uniform left and right braking force can be obtained.

  Further, as shown in FIG. 4, when there is a difference in the stroke adjustment allowance between the outer 7B, 8B and the inner 7A, 8A in the left and right brake wires 7, 8, due to the balance effect of the balance piece 11, for example, When the stroke adjustment allowance of the inner 8A is large with respect to the outer 8B, the balance piece 11 swings as shown by the arrow by largely pulling the right rear wheel brake wire 8 side and moves away from the stopper 10. Accordingly, the inner pieces 7A and 8A of the left and right rear wheel brake wires 7 and 8 are pulled evenly while the balance piece 11 is tilted. As a result, the left and right brakes 4 and 5 (FIG. 2) operate almost simultaneously, and a uniform left and right braking force can be obtained.

  A plurality of protrusions 11 </ b> A and 11 </ b> B are formed on the contact surface of the balance piece 11 that contacts the stopper 10. These protrusions 11A and 11B are formed on the inner side in the width direction of the inners 7A and 8A, and on the outer side in the width direction where the extension of the inner rear brake wire 6A extends through the center hole of the stopper 10. . As a result, the balance piece 11 can swing when it is slightly separated from the stopper 10, and immediately absorbs the difference in the stroke adjustment allowance between the outer 7B, 8B and the inner 7A, 8A in the left and right brake wires 7, 8. In addition, due to the existence of a gap between the stopper 10 and the flat surface of the stopper 10 caused by the formation of the protrusions 11A and 11B, the consistency with the edge of the insertion hole in the stopper 10 of the inner 7A and 8A is fixed. The life of the inner 7A, 8A is increased.

  The embodiments of the present invention have been described above, but within the scope of the present invention, the shape and form of a three-wheeled bicycle (women-type frame, triangular frame, etc.), the shape of a front frame (the cross-sectional shape is a square pipe, a round shape) Pipes, ellipses, etc., are used as appropriate), left and right rear wheel brake shapes, types (band brakes, drum brakes, disc brakes, etc.) and their arrangement (mounting to the wheel hub), protrusions ( If the parallel state with the stopper flat portion is maintained, the shape of the balance piece (triangular, quadrangular, semicircular arc, etc.), type and main rear wheel brake including arcuate protrusions, triangular protrusions, etc. A connection form between the wire and the left and right rear brake wires (an appropriate connection form capable of relative rotation in place of the drum member may be employed. Also, an appropriate inner fixing may be used in place of the daruma screw. Form may be employed), the shape of the stopper, the format and the insertion form of the left and right rear wheel brake wire or the like can be appropriately selected.

It is a principal part top view which shows one Example of the brake device of the tricycle of this invention. FIG. 2 is a rear perspective view of the three-wheeled bicycle to which the brake device of the present invention is attached. FIG. 6 is a plan view during braking operation when there is no difference in stroke adjustment allowance between the outer and inner brakes of the left and right brakes. FIG. 6 is a plan view during a brake operation when there is a difference in stroke adjustment allowance between the outer and the inner in the left and right brakes. It is a disassembled perspective view which shows the prior art example of a brake device.

Explanation of symbols

1 Left rear wheel 2 Right rear wheel 3 Swing frame (front frame)
4 Left rear wheel brake 5 Right rear wheel brake 6 Main rear wheel brake wire 6A Inner 6B Outer 6C Screw part 7 Left rear wheel brake wire 7A Inner 7B Outer 7C drum member 8 Right rear wheel brake wire 8A Inner 8B Outer 8C Taiko member 9 Brake wire fixing bracket 10 Stopper 11 Balance piece 11A First protrusion 11B Second protrusion 12 Daruma screw 13A First adjustment nut 13B Second adjustment nut 14A First link arm 15A Left adjustment tool 15B Right adjustment tool 16A Left fork mounting plate 16B Right hawk mounting plate

Claims (2)

In a brake device for a three-wheeled bicycle in which left and right rear wheel brake wires for operating the respective brakes of the rear two wheels are connected to the main rear wheel brake wire via a balance piece, the balance piece and an outer of the left and right rear wheel brake wires, A stopper having a flat plate surface is fixed substantially perpendicularly to these rear wheel brake wires, and the main rear wheel brake wire is fixed to the contact surface of the balance piece in contact with the stopper on the inner side in the width direction of each inner. A brake device for a three-wheeled bicycle, wherein a plurality of protrusions are formed on the outer side in the width direction at a position where the extension portion of the inner portion extends in the center hole of the stopper . The brake device for a three-wheeled bicycle according to claim 1, wherein the stopper is fixed to a swing frame .

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