JPH0322355B2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Industrial Field of Application The present invention enables front and rear wheel brakes to be applied by operating a pair of left and right brake levers provided at both left and right ends of a steering wheel. The present invention relates to a brake device for use in vehicles such as bicycles, which is activated.

(2) Conventional technology Conventionally, in such braking devices, the brake lever provided at the right end of the handle was connected to the front wheel brake via a transmission cable for the front wheel, and the brake lever provided at the left end of the handle was connected to the front wheel brake. It is generally connected to the rear brakes via a power cable.

However, in the conventional device described above, only one brake can be operated by operating one brake lever, which is inconvenient.

Therefore, a system has already been proposed in which the front and rear brakes can be operated by operating either the left or right brake lever, as disclosed in, for example, Japanese Patent Laid-Open No. 53-69341.

(3) Problems to be Solved by the Invention In the above-mentioned publication, there is a problem between a pair of first transmission cables individually connected to both brake levers and a pair of second transmission cables individually connected to both brakes. are connected via a common connecting member that is slidably supported by the vehicle body frame, so when the brake is operated, a relatively large torsional force is likely to be generated on the sliding part of the connecting member, which causes damage to the brake. This caused an increase in operating force. In addition, in the conventional method mentioned above,
Since the pair of second power transmission cables are pulled by the same amount at the same time by the sliding of the connecting member, it is difficult to make the operating amounts of the front and rear wheel brakes different (i.e., the braking operating force for the front and rear wheels). It was hot.

Therefore, in order to make the operating timing and operating force of the front and rear wheel brakes different, for example,
As disclosed in Japanese Patent No. 199384, by the balance action of the adjuster pivotally connected to the end of the first transmission cable,
A system has already been proposed in which the braking force is distributed to each of the second transmission cables for the front and rear wheels at a predetermined lever ratio, but in that case, the swing fulcrum of the adjuster is connected to the first transmission cable. Since the adjuster also serves as a connecting point between the adjuster and the adjuster, and its position is not fixed, the adjuster tends to wobble and its movement is unstable, and the load on the connecting point is large, causing problems in durability.

The present invention has been proposed in view of the above, and an object of the present invention is to provide a vehicle brake device that can solve the above-mentioned problems of conventional devices.

B. Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides front and rear wheel brakes by operating a pair of left and right brake levers respectively disposed at both ends of the handle. In a vehicle brake device configured to operate a brake lever, a pair of first power transmission cables individually connected to both brake levers are connected to a swing plate that is swingably supported on a vehicle body frame via a support shaft, A pair of second transmission cables are connected to each other so that the swing plate can be swung in one direction even if any of the first transmission cables is towed, and the swing plate is connected to a pair of second transmission cables that are individually connected to both brakes. are connected so that either of the second transmission cables can be towed by swinging the swing plate in the one direction, and
of each connection between the second transmission cables and the swing plate,
The present invention is characterized in that the distances from the support shaft are different, and each connecting portion is disposed between both the first power transmission cables and the rocking plate at an intermediate position between the two connecting portions.

(2) Effect When one of the brake levers is operated, the swinging plate pulled by the corresponding first transmission cable swings, so that swinging activates both brakes via both the second transmission cables. . At this time, the rocking plate is supported by the vehicle body frame via a support shaft and makes a certain simple rocking motion around the support shaft, so its operating direction is always stable and there is no chance of it wandering unnecessarily. There is no risk and the operation is extremely smooth.

In particular, by making the distances from the swing plate support shaft of the connecting parts between both the second transmission cables and the swing plate different, the connection between both the second transmission cables and the swing plate is made different, so that regardless of which brake lever is operated, Since the amount of traction for the front and rear wheels can be made different, a simple lever operation on one brake lever will cause the other brake to start operating with a slight delay after the start of operation of one brake. In addition, it is possible to control the operating force of one brake to be greater than the operating force of the other brake, and to apply different braking forces to the front and rear wheels. can.

(3) Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In FIGS. 1, 2, and 3, a front wheel
Front wheel brake Bf is installed to obtain braking force by friction with rim 1 of Wf, and
A rear wheel brake Br is installed at the rear of the vehicle to obtain braking force through friction with the rim 2 of the rear wheel Wr. In addition, a first brake lever L1 is supported at the right end of a handle 4 rotatably supported by a head pipe 3 at the front of the vehicle body frame F so as to be rotatable toward and away from the grip portion 5. 4
A second brake lever L2 is supported at the left end so that it can be rotated toward and away from the grip portion 6.

One ends of a pair of first transmission cables 7, 8 are individually connected to the first and second brake levers L1, L2. That is, the first power transmission cables 7, 8 are formed by in-wires 11, 12 movably inserted into outer wires 9, 10, and one end of the outer wires 9, 10 connects both brake levers L1, L2 to the handle 4.
It is connected and fixed to mounting members 13 and 14 for mounting on. Further, one ends of the inner wires 11 and 12 protrude from one ends of the outer wires 9 and 10, and are connected to brake levers L1 and L2, respectively.

The front wheel brake Bf is a caliper brake,
Brake rubbers 17 and 18 that can slide on the sides of the rim 1 are attached to a pair of actuating pieces 15 and 16 rotatably supported on the vehicle body frame F so as to straddle the front wheel Wf.
A return spring 19 is interposed between the two operating pieces 15 and 16. This front brake
One end of the second power transmission cable 20 for the front wheel is connected to Bf.

The second power transmission cable 20 for the front wheels is made up of an inner wire 22 movably inserted into an outer wire 21, and one end of the outer wire 21 is connected to one operating piece 15.
One end of the inner wire 22 protruding from one end of the outer wire 21 is connected to the other actuating piece 16 .

The rear wheel brake Br3 is also a caliper brake like the front wheel brake Bf, and the brake rubber 24, 2
A pair of actuating pieces 26, 27 to which 5 is attached, and a return spring 28 interposed between the actuating pieces 26, 27.
It consists of One end of a second power transmission cable 31 for the rear wheel, which is formed by movably inserting an inner wire 30 into the outer wire 29, is connected to the rear wheel brake Br. That is, one end of the outer wire 29 is connected to one of the actuating pieces 26, and one end of the inner wire 30 protruding from one end of the outer wire 29 is connected to the other actuating piece 27.

An L-shaped support member 32 for attaching a headlamp or a basket is attached to the head pipe 3, and a casing 33 is disposed above the support member 32.

The casing 33 is a box-shaped body 34 with one side open.
and a lid member 36 which is removably fixed to the box-like body 34 with a screw member 35 to close the opening of the box-like body 34. The box-like body 34 is integrally provided with a mounting part 38 formed in a cylindrical shape and having a single slit 37 extending in the axial direction.
The casing 33 is fixed to the head pipe 3 by tightening the flanges 39 and 40 provided on both edges with bolts 41 and nuts 42. Moreover, the casing 33 has a gap between the support member 32 and the support member 32 so that a headlamp or a basket can be attached thereto.
2 and is fixed.

A rocking plate 43 is housed in the casing 33, and a base end 43a of the rocking plate 43 is supported on the inner surface of the casing 33 via a horizontal support shaft 44. Therefore, the swing plate 43 is vertically swingable within the casing 33.

The other ends of the outer wires 9, 10 of the pair of first transmission cables 7, 8 are fixed to the upper part of the casing 33, and the inner wires 11, 12 protruding from these outer wires 9, 10 are fixed to the upper part of the casing 33.
drawn inside. On the other hand, a pair of through holes 45 and 46 are bored in parallel in the middle part of the rocking plate 43, and the other ends of the inner wires 11 and 12 that movably pass through the through holes 45 and 46 are locked. head 4
7, 48 are provided, and a coil spring 4 as an elastic member is provided between each locking head 47, 48 and the swing plate 43.
9 and 50 are respectively interposed.

A through hole 51 is formed in a portion of the rocking plate 43 closer to the base end 43a, and a through hole 52 is formed in a portion closer to the tip end 43b than the through holes 45 and 46 are.

The other ends of the outer wires 21 and 29 of the second power transmission cables 20 and 31 for the front and rear wheels pass through the support member 32 and are fixed to the lower part of the casing 33 at positions corresponding to the through holes 51 and 52. Inner wires 22 and 30 protruding from the other ends of both outer wires 21 and 29 are drawn into casing 33 and penetrate through holes 51 and 52 from below. That is, the inner wire 22 of the second power transmission cable 20 for the front wheel passes through the through hole 51, and the locking head 53 provided at the other end.
engages with the upper surface of the swing plate 43. Also, the second wheel for the rear wheel
The inner wire 30 of the transmission cable 31 passes through the through hole 52, and the locking head 54 provided at the other end is connected to the swing plate 4.
It engages with the top surface of 3.

Next, to explain the operation of this embodiment, when one of the first and second brake levers L1 and L2 is operated to obtain braking force while riding a bicycle, the inner wire 11 of the first transmission cable 7, 8 , 12 is pulled, and the swing plate 43 swings upward. As a result, the inner wires 22, 3 of the second power transmission cables 20, 31 for the front wheels and the rear wheels
However, since the inner wire 30 of the second power transmission cable 31 for the rear wheel is engaged near the tip 43b of the swing plate 43, the amount of traction is less than the inner wire 22 of the second power transmission cable 20 for the front wheel. It's also big. Therefore, the rear wheel brake Br starts operating first, and the front wheel brake Bf starts operating slightly later.
As a result, sufficient braking force can be obtained on the rear wheel side, and the risk of falling can be reduced by preventing excessive braking force from being applied to the front wheel side.

Further, a coil spring 4 is provided between the inner wires 11 and 12 of the first transmission cables 7 and 8 and the swing plate 43.
Since the brake levers 9 and 50 are interposed, it is possible to prevent play from occurring in the other brake lever when only one of the brake levers L1 and L2 is operated.

Although the above embodiments are cases in which the present invention is applied to a bicycle, the present invention can also be applied to a wheelchair or the like.

C. Effects of the Invention As described above, according to the present invention, there is provided a brake device for a vehicle in which front and rear wheel brakes are actuated by operating a pair of left and right brake levers respectively disposed at both ends of a handle. , a pair of first power transmission cables individually connected to both brake levers are connected to a swing plate that is swingably supported by the vehicle body frame via a support shaft, and one of the first
The oscillating plate is connected so as to be able to swing in one direction even when the transmission cable is towed, and a pair of second transmission cables individually connected to both brakes are attached to the oscillating plate. By swinging the plate in the one direction, both of the second transmission cables are connected so as to be able to be pulled, and each connecting portion between the second transmission cables and the swing plate is connected to the support shaft. Since the distances are different, when either of the brake levers is operated, the swing plate can be swung through the corresponding first transmission cable, and the swinging causes both the second transmission cables to be swung. This allows both the front and rear brakes to be operated without any problem. Furthermore, by making the distances from the support shaft of the connecting parts between both the second transmission cables and the rocking plate different, both the second transmission cables are Since the amount of traction for the front and rear wheels, that is, the amount of actuation of the front and rear wheel brakes, can be made different, the braking start timing and braking force for the front and rear wheels can be made different by simply operating one brake lever. Therefore, a high-performance vehicle can be obtained, and the braking efficiency of the vehicle can be improved. Furthermore, since the rocking plate is supported by the vehicle body frame via a support shaft and performs a certain simple rocking motion around the support shaft, its operating direction is always stable and there is no risk of it wandering unintentionally. There is no friction, and the operation is extremely smooth.
Therefore, the braking force can always be transmitted smoothly and accurately from each brake lever to the front and rear wheel brakes using the transmission mode described above.

Furthermore, since the connecting portions between both the first power transmission cables and the rocking plate are arranged at intermediate positions between the connecting parts between the two second power transmission ropes and the rocking plate, the front and rear wheels Even if the former connecting parts are separated from each other on the rocking plate in order to greatly differ the braking start timing and braking force, each of the latter connecting parts can be reasonably arranged between the former connecting parts. Since it is not necessary to make the rocking plate particularly long in its longitudinal direction, it can contribute to miniaturization of the device.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a perspective view showing the upper part of the bicycle, FIG. 2 is an enlarged perspective view of the main part, and FIG. 3 is a sectional view taken along the line -- in FIG. . 4... Handle, 7, 8... First power transmission cable, 20
...Second transmission cable for front wheels, 31...Second transmission cable for rear wheels, 33...Casing, 43...Swing plate, 4
9,50...Coil spring as an elastic member, Bf
...Front wheel brake, Br...Rear wheel brake, F...
...Vehicle frame, L1...1st brake lever,
L2...Second brake lever, Wf...Front wheel, Wr
……Rear wheel.

Claims (1)

[Scope of Claims] 1. A vehicle brake device in which front and rear wheel brakes Bf and Br are actuated by operating a pair of left and right brake levers L1 and L2 provided at both ends of a handle 4, respectively. , both brake levers L are mounted on a swing plate 43 that is swingably supported on the vehicle body frame F via a support shaft 44.
1 and L2, so that the swing plate 43 can be swung in one direction even if any one of the first transmission cables 7, 8 is towed. The two brakes are connected to the swing plate 43.
A pair of second transmission cables 2 individually connected to Bf and Br
0, 31 are connected so as to be able to pull either of the second transmission cables 20, 31 by swinging the swing plate 43 in the one direction, and both of the second transmission cables 20,
31 and the rocking plate 43, the distances from the support shaft 44 are made different, and furthermore, both the first power transmission cables 7, 8 and the rocking plate are arranged at intermediate positions between the two connecting parts. 43. A vehicle brake device characterized in that each connecting portion between the vehicle and the vehicle is provided. 2. The vehicle brake device according to claim 1, wherein elastic members 49 and 50 are interposed between the first transmission cables 7 and 8 and the swing plate 43, respectively.