JPH06156250A - Hand brake controller - Google Patents

Abstract

PURPOSE:To provide a hand brake controller which is effective for preventing intrusion of water into an outer tube of a wire and also for reducing the operation force to turn a camshaft lever. CONSTITUTION:A first and a second cross shafts 4 and 5 are provided in the neighborhood of a hand brake shaft 1, and a first to a third turning levers 8, 14 and 17 are provided on the cross shafts 4 and 5 so as to rotate integrally. A wire 3, which operates associated with a hand brake lever, is connected to a lower end of this first turning lever 8 so that the end of the wire 3 points to the lower side from the upper side slantingly, and also a first link rod 16 is connected to the position between the first turning lever 8 and the second turning lever 14, and a second link rod 19 is provided at the position between the third turning lever 17 and the camshaft lever 2 of the hand brake 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a hand brake controller for vehicles such as buses.

[0002]

2. Description of the Related Art Generally, in a vehicle such as a bus, a hand brake (also called a center brake) is attached to a transmission at a rear portion of a vehicle body mainly for the purpose of preventing the vehicle from moving when the vehicle is parked or stopped. As a controller of this handbrake, a handbrake lever installed in the driver's seat so that it can be pulled, a long wire interlocking with this, a camshaft lever that can be pulled and rotated by this wire, and the like are provided. As the wire, a flexible Bowden wire including an outer tube and an inner wire is used.

When the camshaft lever is pulled and rotated by this wire, the cam inside the hand brake operates, the brake shoe is pressed against the brake drum, and the rotation of the propeller shaft connected to this drum is braked. Then, the movement of the vehicle is prevented.

[0004]

By the way, in the above-mentioned conventional handbrake controller, due to the structure of the handbrake, a camshaft lever is rotatably supported on the upper side portion of the handbrake so as to be able to rotate in a slightly obliquely rising state. Therefore, in order to rotate this camshaft lever, it must be pulled diagonally downward. For this reason, the wire cannot be installed in a straight line due to the layout of surrounding devices, and the tip of the camshaft lever is inevitably lowered once at a lower position of the vehicle body and then the terminal is raised obliquely upward. It is connected to the department.

[0005] In such a wire (Bowden wire) installation, since the terminal is directed obliquely upward, the outer tube portion of the wire terminal is caulked or a bellows tube is connected for waterproofing. There was a problem that water was introduced into the outer tube from the terminal while it was in use, which could easily cause rust of the inner wire and corrosion of the outer tube.

Further, since the wire is bent so that it is first lowered and then raised, the force transmission efficiency is poor, and the wire end is directly connected to the camshaft lever. There was a problem that a large operating force was required for the handbrake lever to pull and rotate the shaft lever.

The present invention has been made in view of the above circumstances, and it is an object of the invention to prevent the entry of water into the outer tube of a wire (Bowden wire) so that the end of the wire can be installed diagonally downward. (EN) Provided is a handbrake controller that is effective in reducing the operating force of a handbrake lever for pulling and rotating a camshaft lever, which is effective in transmitting the force of a wire.

[0008]

In order to achieve the above object, a handbrake controller of the present invention is provided with a vibration absorbing cross shaft adjacent to a handbrake attached to a transmission at the rear of a vehicle body such as a bus. A rotating lever that rotates integrally with this cross shaft is provided,
A wire interlocking with the handbrake lever of the driver's seat is provided so that the terminal faces diagonally downward from above so that one end of this rotating lever can be pulled upward to rotate, and the lower end is provided at the other end of the rotating lever. A link rod is provided, which is connected to the cam shaft lever of the hand brake and is connected to the cam shaft lever of the hand brake to pull and rotate the cam shaft lever downward by the rotation of the rotation lever.

[0009]

According to the handbrake controller having the above-mentioned structure, by operating the handbrake lever in the driver's seat, the rotary lever of the cross shaft is rotated in association with the wire so that one end of the rotary lever is pulled upward. Then, the link rod is pulled down by the other end of the rotary lever that is interlocked with this, and the camshaft lever of the hand brake is pulled downward to rotate. This allows the hand brake to perform the braking operation.

Since the wire (Bowden wire) can be installed so that the end of the wire is directed obliquely downward by providing the cross shaft, the turning lever and the link rod, the outer tube portion of the wire end is attached. As with the conventional method, even by simply performing waterproofing such as caulking or connecting bellows pipes, water will not enter the outer tube from the terminal, it is excellent in waterproofness and the inner wire rust and the outer tube No more worrying about corrosion.

Further, since the wire need not be bent so much, the transmission efficiency of the force of the wire is improved, and if the length (turning radius) of the rotating lever of the cross shaft is appropriately selected to be large, the cam The operation force of the handbrake lever for pulling and rotating the shaft lever is reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the hand brake controller of the present invention will be described below with reference to the drawings. 1 is a side view of the main part, and FIG. 2 is a plan view of the main part. In the figure, reference numeral 1 indicates a hand brake (center brake) attached to a transmission at the rear of the vehicle body of a vehicle such as a bus. This hand brake 1 is the same as the conventional one, and a camshaft lever 2 is pivotally attached to the upper side portion in a state of standing up slightly obliquely, and by pulling the camshaft lever 2 downward to rotate it, A cam (not shown) inside the brake 1 is actuated to press the brake shoe onto the brake drum to brake the rotation of the propeller shaft connected to the drum to prevent the vehicle from moving. In order to operate the handbrake 1, a wire 3 interlocking with a handbrake lever of a driver's seat (not shown) is arranged substantially horizontally up to the rear part of the vehicle body.

On the other hand, adjacent to the hand brake 1, a vibration absorbing type first cross shaft 4 and a second cross shaft 5 are respectively attached to a frame 6 of the body and a ball joint 7 is provided.
It is rotatably attached via the. These first
The cross shaft 4 and the second cross shaft 5 are arranged in a horizontal state and in a direction orthogonal to the propeller shaft, and the first cross shaft 4 is arranged at a high position substantially right next to the hand brake 1. The second cross shaft 5 is arranged at a position rearward and lower than the first cross shaft 4.

In the middle of the first cross shaft 4, a first
The rotary lever 8 is fixed so as to rotate integrally. The first rotating lever 8 is usually slightly forwardly projected to project obliquely downward, and the wire 3 is connected to the lower end of the first rotating lever 8 with the terminal oriented obliquely downward from above. The wire 3 is a Bowden wire, and the end of the outer tube 3a is caulked to the stopper 9 to secure the fixing member 1
The position is fixed to the frame 11 of the body at 0, and the bellows tube 12 is further provided at the end thereof to allow the inner wire 3b to move back and forth. The end of the inner wire 3b is connected to the lower end of the first rotating lever 8 via a pin 13.

A second rotating lever 14 is fixed to an intermediate portion of the second cross shaft 5 so as to rotate integrally therewith. The second rotation lever 14 is usually slightly rearward and is provided so as to project obliquely upward. This second turning lever 1
A first link rod 16 is provided by connecting the upper and lower ends to the upper end of 4 and the intermediate portion of the first rotating lever 8 via a ball joint 15. The length of the link rod 16 can be adjusted.

A third rotating lever 17 is fixed to the end portion of the second cross shaft 5 on the handbrake side so as to rotate integrally therewith. This third rotation lever 17
Has a bent piece portion 17a which is provided so as to project obliquely downward in the opposite direction to the second rotation lever 14 and which rises in an L shape from the lower end thereof. The lower end of the third rotating lever 17 is bent at the bent piece portion 17a, and the lower end thereof is connected to the ball joint 18
The second link rod 19 is provided by connecting the upper end to the tip end of the camshaft lever 2 of the handbrake 1 via the second link rod 19. The length of this second link rod 19 is also adjustable.

The operation of the handbrake controller thus constructed will be described. First, by operating the handbrake lever of the driver, the inner wire 3a of the wire 3 is
Is pulled as shown by the arrow in the figure, and the first rotation lever 8 rotates together with the first cross shaft 4. As a result, the first link rod 16 is pulled by the first turning lever 8, and the second turning lever 14 is turned so as to be pulled up.

The rotation of the second rotating lever 14 causes the second cross shaft 5 to integrally rotate, thereby rotating the third rotating lever 17 downward. This third rotation lever 1
The rotation of 7 pulls down the second link rod 19 and pulls the camshaft lever 2 of the handbrake 1 downward to rotate it. As a result, a cam (not shown) inside the handbrake 1 is actuated, the brake shoe is pressed against the brake drum, and the rotation of the propeller shaft is braked to prevent the vehicle from moving.

Here, as described above, the first and second cross shafts 4 and 5 and the first to third rotating levers 8 and 1 are provided.
4, 17 and the first and second link rods 16, 19 allow the wire (Bowden wire) 3 to be routed so that the end of the wire is directed obliquely downward. Therefore, from the wire end to the outer tube portion 3a. Since water does not enter the inside, the waterproof property is excellent and there is no fear of rusting the inner wire 3b or corrosion of the outer tube 3a.

Further, since the wire 3 is not required to be bent so much, the power transmission efficiency of the wire 3 is improved, and the lengths (radius of rotation) of the first and second turning levers 8 and 14 are increased. If you select an appropriately large camshaft lever 2
The operation force of the handbrake lever for pulling and rotating the is reduced.

It should be noted that the present invention is not limited to the above-described embodiment, but for example, the first cross shaft 4, the first turning lever 8 and the first link rod 16 are omitted, and the wire 3 is omitted. It is also possible to connect the end portion to the upper end of the second rotating lever 14 and configure it.

[0022]

Since the handbrake controller of the present invention is constructed as described above, the wire end can be installed so that the end of the wire is directed obliquely downward, and it is effective in preventing water from entering the outer tube of the wire. In addition, the force transmission efficiency of the wire is good, and it is effective in reducing the operation force of the handbrake lever for pulling and rotating the camshaft lever.

[Brief description of drawings]

FIG. 1 is a side view of essential parts showing an embodiment of a hand brake controller of the present invention.

FIG. 2 is a plan view of an essential part of the embodiment.

[Explanation of symbols]

1 ... Hand brake, 2 ... Cam shaft lever, 3 ... Wire, 4, 5 ... Cross shaft, 8, 14, 17 ... Rotating lever, 16, 19 ... Link rod.

Claims (1)

[Claims] 1. A handbrake controller for controlling a handbrake mounted on a transmission at the rear of a vehicle body such as a bus for braking the rotation of a propeller shaft via a wire by operating a handbrake lever of a driver's seat, which is adjacent to the handbrake. A vibration-absorbing cross shaft is provided on the cross shaft, and a rotary lever that rotates integrally with the cross shaft is provided. The wire is pulled upward from the end so that one end of the rotary lever is pulled upward to rotate the wire. A link rod which is provided in a facing state, and whose lower end is connected to the other end of the rotating lever and whose upper end is connected to the camshaft lever of the hand brake, and which is rotated by pulling the camshaft lever downward by the rotation of the rotating lever. A handbrake controller characterized by being installed and configured.