JPH04201769A - Pedal-operated parking brake device - Google Patents

Abstract

PURPOSE:To suppress an impulse noise of a pawl member while holding a safe control condition by meshing a pawl end of the pawl member with a sector tooth of a partial tooth member at a large meshing angle, at braking time, and further disengaging the pawl end of the pawl member from the sector tooth of the partial tooth member at a small meshing angle at the time of releasing a brake. CONSTITUTION:When a pedal lever 20 is swiveled by stepping a pedal 24, a brake cable 23 is pulled drawn to generate braking force. Here by moving also a partial tooth member 30 according to swiveling the pedal lever 20, a pawl end 41 of a pawl member 40 is moved to ride across a sector tooth 31 of the partial tooth member 30 by relative displacement from the pawl member 40. A touching noise of the pawl member 40 is low suppressed by a damper 27. On the other hand, when a release handle 49 is pulled, a release cable 48 is pulled drawn to turn a release member 46. Then, a swivel end 142 of the pawl member 40 is pressed by a pressing piece 47 to turn the pawl member 40 in direction that the pawl end 141 is separated from the sector tooth 31 of the partial tooth member 30.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention provides a system in which the base of a foot lever is pivotally supported on a base fixed to the vehicle body, the tip of which is extended under the foot, and a pedal is provided at the tip. This invention relates to a foot-operated parking brake device that applies braking by extending and contracting a brake cable according to the swinging motion of the brake cable.

``Prior Art'' An example of a technique related to a conventional foot-operated parking brake device is shown in FIG. 6.

FIG. 6 shows the partial tooth member 1 and the pawl member 2 that mesh with each other and receive the braking force during braking, and the partial tooth member 1 that receives the braking reaction force is about to rotate in the direction of arrow A. The claw member 2
The claw end 2a of the tooth member 1 is engaged with the tooth portion 1a of the partial tooth member 1 to prevent rotation.

When releasing the engagement, move the end 2b of the claw member 2 to the release member 3.
The claw member 2 is rotated in the direction of arrow B to separate the claw end 2a from the tooth portion 1a of the partial tooth member l.

"Problem to be Solved by the Invention" However, in this conventional technique, if the engagement angle between the tooth part la of the partial tooth member 1 and the claw end 2a of the claw member 2 is large, it is difficult for them to come off, or on the other hand, It is difficult to set an appropriate meshing angle because the meshing release force becomes large and difficult to release, and when the meshing angle is decreased, the meshing release force decreases and it is easy to release, but it also becomes easy to disengage.

In order to ensure safety, it is normal to set the engagement angle to be large, but this requires a large release force and also causes the claw end 2a of the claw member 2 to separate from the tooth portion 1a of the partial tooth member l when the brake is released. There was a problem in that when playing, a mutual playing phenomenon occurred, resulting in a large sound cancellation.

The present invention has been made by focusing on the problems of the conventional technology.When braking, the claw ends or teeth are engaged with a sufficiently large engagement angle, and when the brake is released, the engagement is easily released with a small engagement angle. The object of the present invention is to provide a foot-operated parking brake device that can be operated.

``Means for Solving the Problems'' The gist of the present invention for achieving the above object is as follows: 1. The base of a foot lever is swingably supported on a base fixed to the vehicle body, and the tip thereof is placed under the foot. In a foot-operated parking brake device in which a pedal is provided at the tip of the foot-operated parking brake device, and a brake cable is extended and contracted according to the swinging of the foot-operated lever to apply braking.

A partial tooth member having sector teeth is disposed at the base of the foot lever, a claw member having a claw end that engages with the sector teeth and which can be engaged and detached by a release mechanism is disposed on the base side; One end of the partial tooth member is pivotally attached to the base of the foot pedal, and a braking position where the engagement angle between the claw end of the claw member and the sector tooth of the partial tooth member is large, and a release position where the engagement angle is small. A foot-operated parking lot, characterized in that a stopper is provided to restrict the movement between the brake and the partial tooth member, and a damper is provided to slightly separate the stopper provided in the braking position from the partial tooth member in the brake release state. Existing in brake equipment.

"Operation" When the foot lever is in the released state before it is depressed, no braking reaction force is applied between the sector tooth of the partial tooth member provided at the base of the foot lever and the claw end of the claw member. The partial tooth member and the stopper in the braking position are slightly separated by the damper.

When you press the pedal and swing the foot lever, the brake cable is tightened and braking force is generated.

As the foot lever swings, the partial tooth member also moves, and due to its relative displacement with the pawl member, the end of the pawl moves over the sector teeth of the partial tooth member. 1. When the pawl member moves over the sector tooth, the pawl member swings and generates a hitting sound. Otherwise, the impact noise can be suppressed to a low level due to the buffering effect of the damper in contact with the partial tooth member.

When the pedal of the foot lever is fully depressed and the force applied to one foot is released, the foot lever attempts to return, and the sector tooth of the partial tooth member and the claw end of the claw member engage with each other due to the braking reaction force. .

As the force applied to the foot is relaxed and a braking reaction force is applied to the sector tooth of the partial tooth member and the claw end of the pawl member, the damper that the partial tooth member is in contact with bends, and the partial tooth member moves to the braking position. It contacts the stopper to receive and stop the braking reaction force.

In the braking state, since the engagement angle is large, the claw ends of the pawl members are reliably engaged and locked with the sector teeth of the partial tooth member to prevent them from coming off, and a stable braking state is maintained.

When the release mechanism rotates the pawl member by a small angle in the direction in which the pawl end is removed from the sector tooth of the partial tooth member in order to release the brake, the partial tooth member or the pawl end, which was initially pushed by the elastic force of the tambour, escapes. It follows the movement and swings by a small angle.

When the damper is fully extended, the partial tooth member follows the claw member due to the sliding resistance of the meshing part due to the braking reaction force, and when the claw member rotates further and the partial tooth member comes into contact with the stopper in the release position, it no longer follows. The pawl end of the pawl member disengages from the sector tooth of the partial tooth member.

The engagement angle between the claw end and the sector tooth when they come off is small, and the smaller the claw end is, the easier it is to come off, and a small release force is required to separate the claw end of the claw member or the sector tooth of the partial tooth member.

When the partial tooth member is released, the foot lever swings in the return direction due to the braking reaction force and returns to the released state, and the brake cable is loosened, causing the braking to be released.

"Example" Hereinafter, one embodiment of the present invention will be described based on the drawings.

1 to 4 show an embodiment of the present invention.

When the foot-operated parking brake device 10 is fixed to the vehicle body, it is rotatably supported on a base bracket 11 having a surface portion 12 by the base 21 of the foot-operated lever 20 or a pivot shaft 20a. The partial tooth member 30 is attached thereto, and includes a claw member 40 that engages and locks the sector teeth 31 of the partial tooth member 30.

The claw end 41 of the claw member 40 is connected to the sector tooth 31 of the partial tooth member 30.
A release member 46 equipped with a presser 47 that presses the swinging end 42 of the claw member 40, a release cable 48 fixed to the distal end side of the release member 46, and a release member that pulls the release cable 48 in order to engage and release the release member 46. Consisting of 49 Hentle
There are five lease model types available.

A brake cable 23 for transmitting braking force is connected to the base 21 of the foot lever 8-20 by a connecting bracket 22, and a pedal 24 is fixedly attached to the roadside portion of the foot lever 20, with the road surface 24a facing directly in the direction of the operator. ing.

Partial tooth member 3 disposed at the base 21 of the foot pedal 8-20
0, one end @32 is the base 2 of the foot lever 20.
1 by a pivot 33.

The sector tooth 31 is carved so as to be approximately centered on the pivot shaft 20a of the foot lever 20.

An arm-shaped stopper 34 extends from the end 32 of the partial tooth member 30.
A stopper receiver 25 is formed on the base 21 of the foot lever 20 to limit the partially toothed member 30 to the release position. Furthermore, the base bracket 11 has a pin-shaped stopper 2 for receiving the back portion 35 on the other end side of the partial tooth member 30.
6 have been planted.

The partial tooth member 30 has a claw end 41 of the claw member 40 and a sector tooth 3.
1 and a braking position where the meshing angle is large and a release position where the meshing angle is small and is limited to 26.34.

A damper 2 made of an elastic material that slightly separates the stopper 26 provided at the braking position and the back part 35 of the partial tooth member 30 by a gap g of about 0.3 to 0.5 when the brake is released.
A biasing spring 2 is provided near the stopper 26 and is brought into contact with the back portion 35 of the partial tooth member 30 and the tamper 27.
8 is stretched between the base 21 of the foot lever 20 and the partial tooth member 30.

A claw member 40 having a claw end 41 that meshes with the sector tooth 31 of the partial tooth member 30 is pivotally connected to the base end or base bracket 11 by a pivot shaft 43, and extends long from the pivot shaft 43 in the shape of an arm. A suppressor 47 of a release member 46 constituting a release mechanism 45 faces the swinging end 42 . Further, between the swinging end 42 and the base bracket 11, a claw member 4 is disposed between the claw end 41 and the sector tooth 31 of the partial tooth member 30.
A spring 42a is tensioned to bias 0.

The release member 46 is attached to the base bracket 1 by a pivot shaft 46a.
1, a suppressor 47 is formed near the pivot shaft 46a, and a release cable 48 is fixedly connected to the road edge 46b.

Next, the action will be explained.

As shown by the solid lines in FIGS. 1, 4, and 5.

When the foot lever 20 is in the released state before being pressed,
No braking reaction force is applied between the sector tooth 31 of the partial tooth member 30 provided at the base 21 of the foot lever 20 and the claw end 41 of the pawl member 40, and the partial tooth member 30 is caused by the elastic force of the damper 27. The back part 35 of is slightly spaced apart from the stopper 26 by a gap g.

When you depress the pedal and swing the foot lever 20,
The brake cable 23 is tightened to generate braking force.

As the foot lever 20 swings, the partial tooth member 30 also moves, and due to the relative displacement with the pawl member 40, the terminal end 41 of the partial tooth member 30 moves over the sector tooth 31 of the partial tooth member 30. Although a hitting sound is generated by the movement, the sound is suppressed to a low level by the damper 27's buffering action.

Fully depress the pedal of the foot lever 20.

When the force applied to the foot is released, the foot lever 20 tries to return, and the sector tooth 31 of the partial tooth member 30 and the pawl member 40
The brake cable 23 engages with the termination end 41 under the braking reaction force, and maintains the brake cable 23 in a tightened braking state.

The sector tooth 31 of the partial tooth member 30 is released by loosening the force applied to the leg.
As the braking reaction force is applied to the terminal end 41 of the claw member 40, the tambar 27 holding the other end of the partial tooth member 30 is bent, and the gap g disappears, and the partial tooth member becomes 30.
It comes into contact with the stopper 26 at the braking position and stops receiving the braking reaction force.

In the braking state, the engagement angle is large, so the claw member 40
The terminal end 41 of the partial tooth member 30 is surely engaged and locked with the sector tooth 31 of the partial tooth member 30 so as not to come off, and a stable braking state is maintained.

When releasing the brake, the release mechanism 45 releases the pawl member 4.
0 is rotated by a small angle in the direction in which the termination end 41 is removed from the sector tooth 31 of the partial tooth member 30.

That is, when the release handle 49 is grasped and pulled, the release cable 48 is tightened and the release member 46 is rotated. When the release member 46 is rotated, the claw member 4 is pressed by the suppressor 47.
0, the pawl member 40 rotates in the direction away from the terminal end 41 or the sector tooth 31 of the partial tooth member 30.

At the beginning of the rotation of the claw member 40, the claw member 40 oscillates by a small angle following the escape of the partial tooth member 30 pushed by the elastic force of the damper 27 or the terminal end 41.

As shown in the imaginary line in FIG. When the stopper 34 of the partial tooth member 30 is moved and the stopper receiver of the base 2 of the foot lever 20 comes into contact with the part 25 at the release position, it will no longer follow, and the terminal end 41 of the pawl member 40 will not follow the stopper 34 of the partial tooth member 30. It's out of 31.

Termination end 41 of claw member 4/0 and partial tooth member 30 when removed
The meshing angle with the sector tooth 31 is smaller,
This small amount makes it easier for the termination 41 to come off.
A small release force causes the terminal end 41 of the pawl member 40 to disengage the partial tooth member 30.
It comes off from the sector tooth 31 of.

When the partial tooth member 30 is released, the foot lever 20 swings in the return direction due to the braking reaction force and returns to the released state, and the brake cable 23 is loosened and the braking is released.

``Effects of the Invention'' According to the foot-operated Birkin brake device according to the yet-to-be-invented invention, the end of the pawl member engages with the sector tooth of the partial tooth member at a large engagement angle during braking, and at a small engagement angle when the brake is released. Since the terminal end of the pawl member is made to disengage from the sector tooth of the partial tooth member, in the braking state, the sector tooth of the partial tooth member and the terminal end of the pawl member are securely engaged, and a safe braking state is maintained. When the brake is released, it can be released with a light operating force, and the flicking phenomenon is small, so the release noise is small.Furthermore, the snapping sound of the lever or pawl member is suppressed during the braking operation, resulting in low noise.

[Brief explanation of the drawing]

ts1 to 5 show an embodiment of the present invention, and FIG. 1 is a front view of the foot-operated parking brake device, and FIG.
The figures are as shown in Fig. 1. FIG. 6 is an explanatory diagram showing the state of engagement between a partial tooth member and a pawl member in the prior art. lO・-・Foot operated parking rake device 11...
Base bracket 20... Foot lever 21...
Base 23... Brake cable 24-...
・Pedal 25-・Stopper receiver is part 26-・
・Stopper 27... Damper 30... Partial tooth member 31... Sector tooth 32 --- End part
33-... Pivot 34... Stopper 40
-... Claw member 41... Termination end 42... Swinging end 45... Release mechanism 46-- Release member 48
...Release cable 49...Release handle

Claims (1)

[Scope of Claims] 1. The base of the foot lever is swingably supported on a base fixed to the vehicle body, the tip of the foot lever is extended under the foot, a pedal is provided at the tip, and the brake cable is connected as the foot lever swings. In a foot-operated parking brake device that applies braking by expanding and contracting, a partial tooth member having sector teeth is disposed at the base of the foot lever, has a claw end that engages with the sector teeth, and is engaged by a release mechanism. A removable claw member is disposed on the base side, one end of the partial tooth member is pivotally connected to the base of the foot lever, and the meshing angle between the claw end of the claw member and the sector tooth of the partial tooth member is adjusted. A stopper is provided to restrict swinging between a braking position where the engagement angle is large and a release position where the engagement angle is small, and the stopper provided at the braking position and the partial tooth member are slightly separated in the braking release state. A foot-operated parking brake device characterized by being provided with a damper.