JP3270194B2 - Interlocking brake device for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interlocking brake device for front and rear wheels in a lightweight vehicle having a rod-shaped handle.

[0002]

2. Description of the Related Art As an interlocking brake device for front and rear wheels, as described in Japanese Utility Model Publication No. Sho 62-18153, a brake lever operates a front disc on one side and a brake pedal operates on the other front disc and rear. There is an example of operating a disk simultaneously.

FIG. 1 is an example showing such a brake system. For the operation of the brake lever 01, hydraulic pressure is supplied to one of the left and right front disc brakes caliper 03 by the master cylinder 02 to brake the front wheels. When the brake pedal 05 is actuated, hydraulic pressure is supplied to the brake caliper 07 of the other front disc brake and the rear disc brake 08 via the pressure control device PCV06 to simultaneously brake the front wheels and the rear wheels.

[0004]

However, it cannot be applied to a vehicle having a single front brake. The present invention has been made in view of such a point, and an object thereof is to provide a front-rear interlocking brake device at a low cost without a significant change even in a vehicle having a single front brake.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises a brake lever on each of left and right grips of a rod-shaped handle and a master cylinder for generating hydraulic pressure by operating the brake lever. to swing from the master cylinder in a vehicle braking by supplying the hydraulic pressure supplied to the hydraulic to the rear brake from the other master cylinder to the front brakes, before and after the one
Arm portion projecting rearward from the brake lever
Protrude forward from the other brake lever that swings back and forth
And an arm portion formed at an end of the left and right arm portions.
A wire cable whose end is slidably engaged with each of the long holes connected between the two long holes so that power can be transmitted in only one direction, and one of the brakes An interlocking brake device for a vehicle that transmits the operating force of the lever to the other brake lever via the wire cable.

[0006] The left and right brake levers have a basic structure of a brake system in which a rear brake and a front brake are operated independently of each other via a master cylinder. In such a basic structure, the left and right brake levers protrude rearward from one of the brake levers . The long hole of the arm and the other
The wire cable is connected to the elongated hole of the arm portion projecting forward from the rake lever so that power can be transmitted in only one direction, and the operating force of one brake lever is transmitted to the other brake lever via the wire cable. Therefore, when one brake lever is operated and when the other brake lever is operated, the front and rear braking forces acting on the front wheel and the rear wheel are different, and can be used properly according to the situation. Also, by connecting both brake levers with a wire cable under the basic configuration as described above, when the operating force of one brake lever is transmitted to the other brake lever via the wire cable, Lever ar
Adjust the pulling amount of the wire cable for the swinging angle of the brake lever by changing the projecting amount of the arm portion, it can be easily configured to approximate the distribution characteristic of the front-rear braking force ideal distribution characteristic. When one of the brake levers is operated on a vehicle having a single front brake, the other brake lever also operates via a wire cable, so that the front and rear brakes can be simultaneously applied. A simple structure in which a wire cable is interposed between the left and right brake levers is low in cost, and can be easily attached later to a conventional vehicle.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention shown in FIGS. 2 and 3 will be described below. FIG. 2 is a schematic configuration diagram of the brake device of the present embodiment.

[0008] Left and right grips 2L, 2R of the rod-shaped handle 1
Are provided with brake levers 3L, 3R and master cylinders 4L, 4R, respectively. The brake levers 3L and 3R are pivotally connected to the brackets 5L and 5R, respectively.
L, 6R, and is pivotally pivoted via a spring (not shown) so as to be urged forward by a spring (not shown).
When a part of the finger which is located in front of R and grips the grips 2L and 2R is hung on the brake levers 3L and 3R and swings backward, the pistons in the master cylinders 4L and 4R are pressed to generate hydraulic pressure.

The oil passage 8 extending from the right master cylinder 4R reaches the front caliper 9 on the front wheel side. Therefore, when the right brake lever 3L is operated, the oil pressure from the right master cylinder 4R to the front caliper 9 via the oil passage 8 is transmitted. Transmitted to brake the front wheels.

On the other hand, an oil passage 10 extending from the left master cylinder 4L is connected to an inlet passage 21 of the pressure control valve PCV12,
The passage 11 extends from the outlet passage 22 of the PCV 12 and is connected to the rear caliper 13 on the rear wheel side.

The PCV 12 has a proportional valve in its housing 20.
23 is configured to control the hydraulic pressure entering from the inlet passage 21 and transmit the oil pressure to the rear caliper 13 from the outlet passage 22. Proportional valve 23 is provided in the valve chamber 24 communicating with the inlet passage 21, urging in the valve body 25 the spring 26 having a hollow chamber 25 ₁ and the valve hole 25 ₂ which communicates with the valve chamber 24 in FIG. 2 to the left is, the outlet chamber 24 ₁ connected to the outlet passage 22 is formed in its left end face.

[0012] And the valve hole 25 ₂ is inserted cut valve 27, also the plug 28 is loosely fitted in the right half portion of the hollow chamber 25 _1,
The right end of the plug 28 is locked to the housing 20 and the plug 28
The cut valve 27 is urged to the left by a spring 29 interposed between the cut valve 27 and the cut valve 27.

[0013] left projecting the cut valve 27 is not in contact with the housing 20 the inner wall constituting the outlet chamber 24 _1, the valve hole 25 of when the valve member 25 by the spring 26 is moved to the left proportional valve 23
₂ opens when the pressure in the output chamber 24 ₁ is raised valve body 25 closes the pressed valve hole 25 ₂ in the right direction, then the increasing pressure in the hollow chamber 25 within _a valve body 25 is moved to the left open the valve hole 25 _2.

Therefore, when the left brake lever 3L is depressed and the hydraulic pressure generated in the left master cylinder 4L is
When introduced into the inlet passage 21 of the CV12, initially the hydraulic enters the hollow chamber 25 ₁ from the inlet passage 21, open the valve hole 25 ₂ outlet passage 22 from the output chamber 24 ₁ through the through the oil passage 11 The power is transmitted to the rear caliper 13 to brake the rear wheels.

[0015] hydraulic pressure is introduced into the rear caliper 13 is increased to some extent, the valve body 25 is moved the valve hole 25 ₂ cut valve 27 closes the rightward direction by the pressure in the output chamber 24 _1, then the hollow chamber 25 ₁ When the pressure is further increased valve 25 raises the pressure in the output chamber 24 ₁ open cavity 25 ₁ moves to the left the valve body
Move 25 to the right again. As the pressure on the outlet side is gradually increased while repeating the reciprocating movement in this way,
When the valve element 25 starts reciprocating, the pressure rises more gradually than the initial pressure rise.

As described above, the front caliper 9 is operated by the right master cylinder 4R of the right brake lever 3R, and the rear caliper 13 is operated by the PCV 12 controlled by the left master cylinder 4L of the left brake lever 3L.

In a vehicle equipped with such a front single disc brake, the present embodiment is arranged such that the wire cable 40 is connected between the left and right brake levers 3L and 3R so that the operation of the left brake lever 3L is transmitted to the right brake lever 3R. Has become.

That is, an arm member 42 protrudes forward from the vicinity of the base end of the left brake lever 3L, and has a long hole at the end thereof.
42 ₁ is provided, from the proximal end portion near the other of the right brake lever 3R arm member 43 is projected rearward elongated hole 43 ₁ is formed on its end.

The long holes 4 of the left and right arm members 42, 43
Left and right master cylinders 4 toward the straight line connecting 2 ₁ and 43 ₁
L, respectively supporting members 44, 45 from 4R is projected, between both supporting members 44, 45 are bridged cable outer 40 ₁ of the wire cable 40, to penetrate the cable outer 40 in _one slidably cable and inner 40 ₂ is projected at both ends, which engaging members 46 provided on one of the left end engaged allowing a slight sliding in the long hole 42 ₁ of the left arm member 42, the cable inner 40 ₂ the engagement member 47 provided on the right end portion is slidably engaged with the long hole 43 ₁ of the right arm member 43.

When the left and right arm members 42 and 43 are compared, the right arm member 43 is larger than the left arm member 42, and the distance from the swing center to the slot and the length of the slot itself in the longitudinal direction are longer.

FIG. 2 shows the left or right brake lever 3L,
To 3R shows a state in which no force is applied, there are long holes 42 _1, 43 ₁ in the longitudinal direction of the left and right arm members 42, 43 in the lateral direction of extension of the cable inner 40 ₂ in such a state, the cable inner 40 ₂ of the left end engaging member 46 leaving a slight clearance left in contact with the right inner surface of the elongated hole 42 _1, the right end engaging member 47 of the cable inner 40 ₂ right in contact with the left side inner surface of the elongated hole 43 ₁ Have large voids.

[0022] Therefore, when grasping the right brake lever 3R, but the arm member 43 pivots clockwise, the arm member from the elongated hole 43 ₁ has a gap on the right side of the engaging member 47 43
Does not act on the cable inner 40 ₂ and the left brake lever 3
After all, only the front caliper 9 is operated while L remains unchanged, and a front braking force is applied.

[0023] When gripping the left brake lever 3L, the arm member 42 is swung counterclockwise, pull the cable inner 40 ₂ engaging member 46 engaged with the long hole 42a swings integrally cable right end engagement member 47 of the inner 40 ₂ is not in contact with the left side inner surface of the long hole 43 ₁ of the arm member 43 the arm member 43
Swings clockwise with the right brake lever 3R.

Accordingly, when the left brake lever 3L is operated, the right brake lever 3R is operated via the wire cable 40 at the same time, and not only the rear caliper 13 but also the front caliper 9 is operated to apply a braking force to the front and rear wheels.

FIG. 3 is a graph showing the distribution characteristics of the braking force before and after the braking force, with the horizontal axis representing the front braking force and the vertical axis representing the rear braking force. L01 (dashed-dotted line) is an ideal distribution curve for one-seater and L02 (two-dotted chain-line) is an ideal distribution curve for two-seater, whereas L1 is a distribution characteristic when the left brake lever 3L is operated alone.

When the operation of the 3L is started, the PCV 12 does not operate at first, and the distribution of the front and rear braking forces is determined by the connection state of the left and right brake levers 3L and 3R by the wire cable 40, and is indicated by the line segment a in the curve L1. It shows a certain gradient straight line, and the front braking force and the rear braking force are in a certain proportional relationship.

When the hydraulic pressure applied to the rear caliper 13 increases to some extent, the PCV 12 operates to control the pressure rise rate to be lower than at the beginning, so that the rear braking force rises gradually and the gradient becomes gentle as shown by the line segment b. The distribution characteristic of the braking force before and after is shown, and is close to the ideal distribution curve L01 for two-seater.

It should be noted changing the protruding length of the arm member 42 from the left brake lever 3L projecting forward, the long hole from the pivot axis 6L is swung around the left end engaging member 46 of the cable inner 40 ₂ is engaged 42 By changing the distance to ₁ , the cable inner 40 _{2 with} respect to the swing angle of the left brake lever 3L
Can be changed, and therefore, the longitudinal braking force distribution characteristic can be changed.

As described above, even in a vehicle having a single front brake, by operating the 3L, the right brake lever 3R can be operated simultaneously by the right brake lever 3R via the wire cable 40 to exert the front and rear braking force.

Since the wire cable 40 is provided between the left and right brake levers 3L and 3R with a simple structure, the cost is low, and the vehicle can be easily attached later to a conventional vehicle.

The distribution characteristic of the front and rear braking force can be easily changed by replacing the arm with a different projection length from the brake lever, so that the distribution characteristic can be set freely.

Next, another embodiment will be described with reference to FIGS. In the present embodiment, in addition to the above embodiment, the left brake lever is interlocked with the operation of the right brake lever, and the PCV used is replaced with a new one. Therefore, the same members as those in the above embodiment are denoted by the same reference numerals.

The construction of the wire cable 50 for operating the left brake lever 3L by operating the right brake lever 3R is substantially the same as the construction of the wire cable 40 for operating the right brake lever 3R by operating the left brake lever 3L. Is further provided.

[0034] That is the wire cable 50 between the elongated hole 53 ₁ of the right brake lever long hole 52 ₁ and the left brake lever 3L arm member 53 which protrudes from the rear of the arm member 52 which protrudes forwardly from the 3R cable There are bridged, the cable outer 50 ₁ of the wire cable 50 is both master cylinders 4L, is installed between the support member 54 and 55 which are respectively protruded from the 4R, and slidably penetrates the cable outer 50 in ₁ the inner 50 ₂ its engagement members 56 and 57 at both ends are engaged in a freely respectively slide in the long hole 52 _1, 53 ₁ of the arm members 52 and 53.

The left or right brake lever 3L, when no external force is applied to 3R, the engaging members 56 and 57 is in contact with the inside of the elongated hole 52 _1, 53 _1. Therefore, when the right brake lever 3R is operated, the left brake lever 3L is interlocked via the wire cable 50, and the other wire cable 40 does not work as described above.

The pressure control valve PCV60 of this embodiment, which is interposed in the oil passages 10 and 11 connecting the left master cylinder 4L and the rear caliper 13, further includes a cut piston and a pressure reducing piston in the PCV12 of the above embodiment. Therefore, the proportional valve 23, the valve chamber 24, the valve body 25, the spring 2
6, the cut valve 27, the plug 28, the spring 29, etc. are the same, and the same symbols are used.

[0037] In the housing 61 of PCV60, the cut piston 62 of cylinder is formed in the left side in FIG. 4 of the outlet chamber 24 ₁ is urged to the right by the I 63 if fitted slidably It is in contact with the protruding tip of the proportional valve 23. And it moved against the cutting piston 62 spring 63 to expand the volume of the outlet chamber 24 ₁ when the pressure in the outlet chamber 24 ₁ is higher than a certain degree.

The hollow chamber 25 of the passage 66 at an angle from the outlet chamber 24 ₁ is formed is led to the outlet passage 67, one of the valve body 25
_A decompression piston 68 is orthogonally interposed in the passage 65 communicating with the inlet passage 64 from the inlet passage 64. The pressure reducing piston 68 is in the passage 65
The tip of the cylinder for accommodating the left half portion of the spring 69 to form a stepped portion 68 ₁ which is tapered to the orthogonal portion is urged leftward decompression piston 68 is in the communion communication with the passage 66 of the.

The hydraulic pressure is PCV from the left master cylinder 4L.
When introduced into the inlet passage 64 of the pump 60, the pressure reducing piston 68 is initially in the position shown in FIG. 4 and the passage 65 is in a conductive state, and performs the same control as the PCV 12 of the above embodiment.

[0040] That is, first valve hole 25 ₂ performs the opening and closing cut valve 27 in the reciprocating movement of the valve element 25 when a certain amount pressure through the first stage of the oil pressure rise at a constant rate of increase in the open state rises, the hydraulic pressure rise rate Enter the second stage of decline.

[0041] When the further introduction pressure rises, enters the third stage which acts to maintain a constant braking force by the rear caliper 13 to expand the volume of the outlet chamber 24 ₁ retreats cutting piston 62, continued pressure increase becomes remarkable effect of the pressure acting on the tip and the step portion 68 ₁ of the vacuum piston 68 and there is, control by the rear caliper 13 to further expand the volume communicating with the outlet chamber 24 ₁ by vacuum piston 68 is retracted This is the fourth stage of reducing the power.

As described above, the PCV 60 performs the first stage in which nothing is operated, the second stage in which the valve body 25 operates, the third stage in which the cut piston 62 operates, and the fourth stage in which the pressure reducing piston 68 operates. Control.

FIG. 5 shows the longitudinal braking force distribution characteristic of the present embodiment using the PCV60. Curve L as in FIG.
01 (dashed-dotted line) and curve L02 (dashed-dotted line) are ideal distribution curves for one-seater and two-seater.

The curve L2 shows the distribution characteristics when the right brake lever 3R is operated.
The hydraulic pressure is constantly applied to the front caliper 9 via the oil passage 8 by the right master cylinder 4R through the oil passage 8 by the right master cylinder 4R, but is generated in the right master cylinder 4R by the left brake lever 3L interlocked via the wire cable 50. The hydraulic pressure is controlled by the PCV 60 on the way and is introduced into the rear caliper 13 via the oil passages 10 and 11, so that the first
In the control of the step, the distribution characteristic of the steepest line segment ar is shown, in the next control of the second step, the line segment br whose slope becomes gentler, and in the next control of the third step, the rear braking force is shown. Is kept constant, and a horizontal line segment cr is shown in the next fourth stage, and a line segment dr with a negative gradient is shown in the next fourth stage. are doing.

On the other hand, when the left brake lever 3L is operated, the distribution characteristic is as shown by the curve L3. Along the top of the ideal distribution curve L02 for two-seater,
Line segments al, bl, and cl according to the control in a few steps are continuous.

Therefore, in the case of single-seater operation, by operating the right brake lever 3R, substantially ideal front-rear braking force distribution characteristics can be easily obtained. In the case of two-seater operation, by operating the left brake lever 3L, the ideal front-rear braking force can be obtained. A characteristic close to the distribution characteristic can be easily obtained.

The distribution of the front-rear braking force can be freely set by setting the arm member projecting from the brake lever to an appropriate projecting length.

As described above, the left and right brake levers 3L, 3L
The Rs can be connected to each other by a wire cable so that they can be linked to each other, and the distribution of the front and rear braking forces can be freely set despite the simple structure and low cost.

[0049]

According to the present invention, the interlocking brake can be constructed with a simple structure in which the left and right brake levers are connected by a wire cable using the front and rear independent brake systems as they are, and the cost is low. It can be easily added later to the system.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a conventional brake system.

FIG. 2 is a schematic configuration diagram of a brake device according to an embodiment of the present invention.

FIG. 3 is a diagram showing a longitudinal braking force distribution characteristic of the brake device.

FIG. 4 is a schematic configuration diagram of a brake device according to another embodiment.

FIG. 5 is a view showing a longitudinal braking force distribution characteristic of the brake device.

[Explanation of symbols]

1 ... handle, 2L ... left grip, 2R ... right grip,
3L: Left brake lever, 3R: Right brake lever, 4
L: left master cylinder, 4R: right master cylinder,
5L: left bracket, 5R: right bracket, 6L: left pivot, 6R: right pivot, 8: oil passage, 9: front caliper, 10, 11: oil passage, 12: PCV, 13: rear caliper,
20 ... housing, 21 ... inlet passage, 22 ... outlet passage, 23 ... proportional valve, 24 ... valve chamber, 25 ... valve body, 26 ... spring, 27 ... cut valve,
28… Plug, 29… Spring, 40… Wire cable, 42, 43
... arm members, 44, 45 ... support members, 46, 47 ... engagement members,
50 ... wire cable, 52, 53 ... arm member, 54, 55 ...
Supporting member, 56, 57 engaging member, 60 PCV, 61 housing, 62 cut piston, 63 spring, 64 entrance passage,
65, 66 ... passage, 67 ... outlet passage, 68 ... pressure reducing piston, 69 ...
Spring.

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-5-16866 (JP, A) JP-A-57-84277 (JP, A) JP-A-5-16867 (JP, A) JP-A-5-16867 16863 (JP, A) JP-A 59-167785 (JP, U) JP-A 62-18153 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62L 3/08 B62L 3 / 02

Claims (1)

(57) [Claims] A left and right grip of a rod-shaped handle is provided with a brake lever and a master cylinder that generates hydraulic pressure by operating the brake lever, and supplies hydraulic pressure from one master cylinder to a rear brake and front brake from the other master cylinder. In a vehicle that brakes by supplying hydraulic pressure to the brake lever,
The arm that comes out and the brake that swings back and forth on the other side
And an arm portion projecting from the lever forward, the right and left
The end of each arm slides into each slot formed at the end of the arm.
Characterized in that movably engaged with the wire cable is connected between both the long holes only be able to transmit power in one direction, to transmit the operating force of one of the brake lever via the wire cable to the other of the brake lever Interlocking brake device for vehicles.