JPS6224311B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a parking brake device used in a vehicle such as a rocking tricycle that swings between a front vehicle body and a rear vehicle body, and in particular, the present invention relates to a parking brake device that is used in a vehicle such as a rocking tricycle that swings between a front vehicle body and a rear vehicle body, and in particular, a parking brake device that uses a braking brake and a parking brake in common. The present invention relates to a parking brake device that allows the amount of tension on the parking brake cable to be larger than the amount of tension on the brake cable, thereby improving the operability of the parking brake.

The applicant previously proposed a rolling tricycle that is equipped with one front wheel and two rear wheels, the front body of which is swingable relative to the rear body, and which is driven by a prime mover.

In such tricycles, the braking devices for the rear two wheels are used together with the braking device for the front wheels, and the braking is performed by both the front and the front wheels.
It is a composite of the rear wheels. Braking during driving is a combination of the front and rear wheels as described above.
Even if braking elements such as brake shoes wear out to a certain extent, or cables stretch, there is no problem with their original function, and the driver's operations are usually done according to the wear and stretch, so it is not practical. This results in effective braking.

By the way, if one of the front and rear wheel braking devices, for example, the rear wheel braking device, is used as a parking lock device, and the locking mechanism of the tricycle is also input to the brake cable using the parking operator mechanism, this is operated. Assuming the above-mentioned wear of the brake shoe and cable elongation, the parking operation cable input must be corrected accordingly. That is, it is necessary to pull the brake cable extra by the parking operation cable in response to wear and elongation, and correction cannot be made by simply connecting the brake cable and the parking operation cable.

The above problem is not limited to rocking tricycles, but is a common problem in vehicles that employ a configuration in which the original braking device is used as a parking brake, and the operation system of this device is used to interlock other parking mechanisms.

The present invention was made in view of the above-mentioned circumstances requiring correction when configuring such a parking device.
The purpose of this is to insert a means for inputting input from the parking operation cable into the original brake cable system, and set this so that the amount of movement in the axial direction of the brake cable is greater than the amount of movement in the axial direction of the brake cable. Another object of the present invention is to provide a parking brake device for a vehicle in which compensation for brake shoe wear and the like can be made by relative movement of cables to each other, thereby improving the operability of the parking brake.

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a schematic side view of a tricycle 1. The tricycle 1 has a body divided into a front body 2 and a rear body 3, and a single steering wheel is formed at the front of the front body 2 via a front fork 4. It has a front wheel 5, a front fork 4 extending upward and a handle 6 at its upper end,
In addition, a headlight unit 7 is attached to the middle part of the handlebar 6, and a seat post 8 is provided upwardly at the rear of the front body 2, and a seat 9 is attached to the upper end of the seat post 8.
is provided. An engine 11 is mounted on a rear frame 10 that forms the main part of the rear vehicle body 3, and two rear wheels 13, which are driving wheels, are arranged on the left and right sides of a transmission case 12 that is connected to the engine 11 and extends rearward. The engine 11 and case 12 are covered with a cover 14.

A joint 15 is pivotally attached to the rear lower part of the front vehicle body 2 by a pin 16 via a boss portion 15a at the front end, so that the joint 15 swings or swings in the vertical direction using the pin 16 as a fulcrum. The lower end of the cushion unit 17 is pivotally connected to the boss portion 15b protruding upward from the rear, and the unit 17
The upper end of the seat post 8 is pivotally connected to the middle portion of the seat post 8 of the front vehicle body 2. The joint 15 is provided with a support shaft 18 that tilts rearward and downward in the front-rear direction, and is pivotally connected to the rear frame 10 by the support shaft 18 so as to be able to rotate left and right about the shaft as a fulcrum, that is, swing (roll). Although not shown in the drawings, a Neidhardt damper or the like is installed in the joint 15 around the support shaft to reduce rotation thereof.

Reference numeral 19 denotes a parking operating lever, which is provided below the center of the handle 6 in the embodiment, and the raised position indicated by chain line A in the figure is the parking state, and the fallen position parallel to the steering stem 4a above the front fork shown by the solid line is the released state. The proximal end of the lever 19 is connected to the front end of the inner 20a of the operating cable 20, and therefore, by raising the lever 19 as shown at A, the inner 20a is pulled. The cable 20 is extended to the joint 15 along the stem 4a, the post section 2a, and the floor 2b.

A brake cable 21 is disposed adjacent to the parking operation cable 20, and one end of the inner 21a of the brake cable 21 is connected to an operator such as an operation lever (not shown) provided on the grip on the back side of the handle 6 in the front and back directions in the drawing. The cables 20 and 21 are connected and extend substantially parallel to the cable 20 in the direction of the joint 15, and the cables 20 and 21 are both covered with outer jackets 20b and 21b, as is known.

A recess 15c that is open to the outside is provided on one side of the joint 15 described above, and a support 22 is attached to the front edge 15e of the wall frame 15d surrounding the recess 15c. The rear end of the outer 21b of the brake cable 21 is supported via the fastener 23, and the outer rear end of the operating cable 20 is supported by the upper support portion 22b via the fastener 24. The axial direction of the cable is adjustable between a nut 24a interposed between the end cover 15f covering the support 22 and a bolt portion forming the fastener main body 24b.

The inner 21a of the brake cable 21 is in the recess 1
5c and facing the front and back direction, while the cable 21 is used as a brake input cable, and the wall frame 15
At the rear end 15g of d, the tips of the cable outer cables 27b of the two output cables 27, 27 connected to the brake arms 26 of the left and right rear wheels via the support 25 are arranged vertically to be mounted and supported, and each cable inner cable 27a is connected to the brake arm 26. Connect each inner 27a of the output cables 27, 27 to the recess 1.
5c extends vertically into the rear part, and the extending end portions 27c, 27c of each inner are connected to the horizontal plane U through the tie rod 27d.
Left and right side pieces 28a, 2 of the second connection piece 28 in the shape of a
8a Connect the top and bottom. On the other hand, the rear end of the extending portion 21c of the input cable 21 described above into the recess 15c is connected to the bottom piece 29b of the first connecting piece 29 which is horizontally U-shaped in plan with the stopper 2.
1d, each connecting piece 28, 29 has its open side facing each other, and the side piece 29a of the first connecting piece 29,
The width between 29a is larger than that of the other, and the tips of the side pieces 28, 28a of the second connecting piece 28 are inserted between the side pieces 29a, 29a of the first connecting piece 29, and the side pieces 2
A pin 30 is horizontally suspended at the vertical midpoint of the tie rods 27d, 27d described above in 8a, and both outward protrusions 30a, 30a of this are provided on both sides of the first connecting piece 29 in the front-rear direction. It engages with the elongated hole 31. In this way, an equalizer mechanism is constructed in which the two output cables 27, 27 are braking input with one input cable 21, and the braking input of the cable 21 is transmitted through the first connecting piece 29,
Front end 31a of long hole 31, pin 30, second connecting piece 28
The signal is transmitted to the two output cables 27, 27 via the inner cable, and the tension of the inner part of the cable causes the brake arms 26 of the left and right rear wheels to swing, thereby performing braking during driving.

A plate-shaped intermediate member 32 is interposed between the engaging portions of the first and second connecting pieces 28 and 29, and the lower end of the intermediate member 32 is pivotally connected to the bottom of the recess 15c via a pin 32a. and is urged in the return direction by a spring 33. The intermediate member 32 extends upward through the pin portion of the side piece 28a, and has an elongated hole 34 in the front-rear direction at its intermediate portion, into which the axially intermediate portion of the pin 30 described above is inserted and engaged. do. This elongated hole 34 has a sufficiently smaller length in the front-rear direction than the elongated hole 31 described above.
Therefore, during braking operation, the first
The stroke of the connecting piece 29 in the tensile direction is
This is the range regulated by the long holes 34 of No. 2.

The rear end inner 20a of the operation cable 20 is connected to an input rod 35, and the rod 35 faces the front to middle part of the recess 15c, and its tip is connected to the middle part of the link 36 inside the recess, and the link The lower end of the pin 36 is inserted into the lower half of the recess 15c via the pin 36a.
The upper end of the link 36 is connected via a pin 36b to one end of a first continuous rod 38 disposed in the front-rear direction, and the upper end of the intermediate member 32 through pin 32b to the second
Connected to one end of the connecting rod 39. The connecting rods 38 and 39 are arranged so as to overlap halfway in the front-rear direction, and are connected to each other through the respective long holes 38a and 39a and the pin 38.
b, 39b are engaged and connected so as to be movable for a predetermined stroke in the front and back direction, and a flange portion 3 is provided at each free end.
8c, 39c are provided, seats 38d, 39d are engaged with these, and the spring 40 is compressed between them.

The rear end of a lock operating rod 41 provided longitudinally in the recess 15 is pivotally connected to the pin 36a connecting the link 36 and the arm 37, and its front end 41a is provided laterally in the front part of the recess. Swing lock arm 42
The arm 42 is attached to one end 42a like a universal joint.
The proximal end is pivotally supported in the joint recess by a pin 42b, and is integrally provided with a cam part 42c, which is engaged with the cam recess 43b of the pawl 43 pivoted by the pin 43a, and the pawl part 43c and The above-mentioned supporting shaft 1 is opposite to the
A plurality of engaging recesses 44a are provided radially at the side end of the plate 44, and the engaging recesses 44a at the side end of the lock plate 44 fixed to the tip of the lock plate 8 are exposed.

Next, to describe its action and effect, Figures 2 and 4 show
All solid lines in the figure indicate the parking release state.

Lift the operating lever 19 upward to move it to the state shown in FIG. 1A. As a result, the operation cable 20
The inner 20a of is pulled, and the link 36 is connected to the pin 3
6a, the arm 37, and the operating rod 41, they swing forward, and are in the states shown by chain lines B, C, and D in FIG. 2, respectively.

As the link 36 moves, the first connecting rod 38 moves as shown by the chain line E, and the second connecting rod 39 moves through the elongated hole and the pins 38a, 3.
8b, 39a, and 39b are movable in a predetermined stroke in the front and back direction, so they follow while compressing the spring 40,
Since the intermediate member 32 is connected to the second connecting rod 39 by a pin 32b, it swings clockwise in FIG. 2 as shown by the chain line F, and the pin 30 that engages with the rear end of the elongated hole 34 moves forward. do. Thus, the second connecting piece 28 moves forward as indicated by the chain line G, and the cables 27, 27 are pulled, thereby locking the braking devices of the two rear wheels. In this case, the stroke of the intermediate member 32 is
This is the range of the elongated hole 31, which is sufficiently longer than the elongated hole 34 that regulates the stroke of the first connecting piece 29 of the intermediate member 32, and therefore the stroke of the brake cable 21. Even if the cable stretches, the stroke can be made larger than this, and this can be compensated for. By the way, when the cable elongation and shoe wear are small, when the operating cable is pulled as much as possible, the spring 40 bends and becomes the state shown by the chain line H in FIG. 27 can be prevented from being overloaded.

On the other hand, the forward movement of the operating rod 41 causes the arm 42 to move to the fourth position.
The cam part 42c swings counterclockwise in the figure as shown by the chain line, and the cam part 42c swings in the same direction as the chain line J, pressing the shoulder 43d of the concave part of the pawl 43 in this direction, as shown by the chain line K. The claw portion 43c enters and engages the recess 44a of the lock plate 44, thereby preventing rotation of the spindle, that is, locking the spindle in the rolling direction. Note that if the claw portion 43c hits the peak portion 44b between the recesses 44a, the above operation will not be performed, but in this case, since the link 36 and the arm 37 are pivotally connected, The transition is successful and locks the brake, which causes arm 3 to
7. The operating rod 41 is biased in the locking direction,
This is prevented by the above, and the joint 15, and therefore the front vehicle body, rotates in either direction, and the claw portion 43c
The engagement is made when the recess 44b and the recess 44b match.

Preferably, the cable 20 is of the push-pull type, so that when the lever 19 is released, the link 36 is returned to its original position to more accurately release the rolling lock. Since the return elasticity is acting, it will be released immediately.

Although the above embodiment was applied to a swinging tricycle, it can be used for any vehicle, and the cable on the output side may be of one type.Furthermore, although the long holes 31 and 34 are used in the embodiment, it can be used for any vehicle. Groove engagement may also be used.

As is clear from the above, according to the present invention, in a rocking tricycle or the like, a single operation input system is used to lock the brake device, and at the same time, a swing lock etc. is performed, and the brake lock is performed using the existing braking device. When used as a parking brake, compensate for any wear on the brake shoe of the existing braking device, cable elongation, etc., and set the stroke of the parking operation cable longer than the stroke of the brake input cable. In addition to improving the brake operability of the brake cable, the above is divided into input and output parts for the brake cable, and an intermediate member inputted by the operation cable is interposed between the two and engaged with the long hole, and the long hole is connected to the intermediate member and the brake. It has many advantages, such as a simple structure and only needing to be different on the cable side.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a side view of a rocking tricycle, FIG. 2 is a cutaway side view of a main part of a parking brake device, and FIG.
-3 line sectional view, and FIG. 4 is a fragmentary plan view of the main part of FIG. 2. In addition, in the drawing, 1 is the vehicle, 20 is the parking brake cable, 21 and 27 are the brake cables, and 2
8 and 29 are connecting members, 32 is an intermediate member, 30 is a connecting portion, and 31 and 34 are moving portions.

Claims (1)

[Claims] 1. A joint is inserted in the middle of a brake line that connects a brake operator to a brake device via a brake cable, and the brake cable is divided within the joint, and the first and second joints are connected to the input side and output side, respectively. A connecting piece is fixedly installed, and the second
An intermediate member connecting the first connecting piece and the parking brake cable is pin-coupled to the connecting piece through an elongated hole that allows relative movement of a predetermined distance to each other, and the relative movement between the first and second connecting pieces is A parking brake device characterized in that the elongated hole of the first connecting piece that restricts relative movement between the second connecting piece and the intermediate member is longer than the elongated hole of the intermediate member that restricts movement.