JP3130037B2 - Foot-operated parking brake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a foot lever which pivotally supports a base of a foot lever on a base fixed to a vehicle body, extends a tip of the foot below a foot, and provides a pedal at a tip. The present invention relates to a foot-operated parking brake device which applies a brake by extending and contracting a brake cable in accordance with the swing of the vehicle.

"Prior art" As a technique relating to a conventional foot-operated parking brake device, there is, for example, the one shown in FIG.

FIG. 6 shows a partial tooth member 1 and a claw member 2 which mesh with each other and receive a braking force at the time of braking, in which the partial tooth member 1 which has received a braking reaction force tends to rotate in the direction of arrow A. Are locked so that the claw end 2a of the claw member 2 meshes with the tooth portion 1a of the partial tooth member 1 and does not rotate.

To release the engagement, the end 2b of the claw member 2 is
To rotate the claw member 2 in the direction of arrow B to separate the claw end 2a from the tooth portion 1a of the partial tooth member 1.

[Problem to be Solved by the Invention] However, in such a conventional technique, if the meshing angle between the tooth portion 1a of the partial tooth member 1 and the claw end 2a of the claw member 2 is large, it is difficult to be disengaged. When the meshing angle is reduced, the meshing release force is reduced and the clutch is easily released, but is easily disengaged. Therefore, it is not easy to set an appropriate meshing angle.

Normally, the engagement angle is set to be relatively large in order to ensure safety. However, in this case, a large releasing force is required, and the pawl end 2a of the pawl member 2 is disengaged from the tooth portion 1a of the partial tooth member 1 when the braking is released. In this case, there is a problem that a mutual release phenomenon occurs and a loud release sound is generated.

The present invention has been made in view of such problems of the conventional technology, and the pawl ends mesh with the teeth at a sufficiently large meshing angle at the time of braking, and easily disengage at a small meshing angle at the time of braking release. It is an object of the present invention to provide a foot-operated parking brake device that can perform the operation.

"Means for Solving the Problems" To achieve the above object, the paper of the present invention includes: (1) The base of a foot lever is pivotally supported on a base fixed to a vehicle body so as to be swingable, and the tip of the foot is a foot. And a pedal is provided at the tip of the foot pedal, and the brake cable is extended and contracted in accordance with the swing of the foot lever to apply braking. In this case, the partial tooth member having sector teeth is swung to the base of the foot lever. A claw member movably pivoted and having a claw end meshing with the sector teeth, a claw member capable of being disengaged and operated by a release mechanism is swingably disposed on the base; The partial tooth member is brought into contact with one end of the partial tooth member so as to be able to swing between a braking position having a large meshing angle between the claw end and the sector tooth and a release position having a small meshing angle. Release position And a stopper that abuts on the other end and limits the partial tooth member to the braking position. In the release position, the stopper contacts the partial tooth member, and the partial tooth member and the braking position side. A gap of a predetermined distance is provided between the partial tooth member and the stopper at the braking position when the partial tooth member swings from the release position to the braking position. A foot-operated parking brake device, characterized in that a damper made of an elastic material is provided so as to be in contact with the parking brake device.

`` Operation '' When the foot lever is in the released state before depressing, there is no braking reaction between the sector teeth of the partial tooth member provided at the base of the foot lever and the claw end of the claw member, and the damper The partial tooth member and the stop in the braking position are slightly separated.

When the foot pedal is depressed and the foot lever is swung, the brake cable is contracted and a braking force is generated.

The partial tooth member also moves with the swing of the foot lever,
Due to the relative displacement with the claw member, the claw end moves over the sector teeth of the partial tooth member. The claw member swings when it gets over, and a hitting sound is generated. However, the hitting sound is suppressed low by a damping action of the damper with which the partial tooth member is in contact.

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

As the braking force is applied to the sector tooth of the partial tooth member and the claw end of the claw member by releasing the force applied to the foot, the damper against which the partial tooth member abuts is bent, and the partial tooth member is in the braking position. It comes into contact with the stopper and receives the braking reaction force.

In the braking state, the engaging angle is large, so that the claw end of the claw member is securely engaged and locked so as not to be disengaged from the sector teeth of the partial tooth member, and a stable braking state is maintained.

When the claw member is turned by a small angle in a direction in which the claw end is disengaged from the sector teeth of the partial tooth member by the release mechanism to release the braking, the claw end is initially released by the partial tooth member pressed by the resilience of the damper. It swings only a small angle to follow.

When the damper is fully extended, the partial tooth member follows the claw member due to the sliding resistance of the meshing portion due to the braking reaction force, and if the claw member further rotates and the partial tooth member comes into contact with the stopper at the release position, it cannot follow, The pawl end of the pawl member is disengaged from the sector teeth of the partial tooth member.

The engaging angle between the claw end and the sector tooth when the claw is disengaged is small, and the claw end is easily disengaged by this reduced amount, and the claw end of the claw member is disengaged from the sector tooth of the partial tooth member with a small releasing force.

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

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

 1 to 4 show one embodiment of the present invention.

In the foot-operated parking brake device 10, a base 21 of a foot lever 20 is pivotally supported by a pivot shaft 20a so as to be rotatable on a base bracket 11 having a mounting surface portion 12 fixed to a vehicle body, and is partially connected to the base 21 of the foot lever 20. The tooth member 30 is mounted, and includes a claw member 40 that meshes with and locks on the sector teeth 31 of the partial tooth member 30.

In order to engage and disengage the claw end 41 of the claw member 40 with the sector teeth 31 of the partial tooth member 30, a release member 46 including a pressing element 47 for pressing the swing end 42 of the claw member 40, and a distal end side of the release member 46 And a release mechanism 45 comprising a release handle 49 for pulling the release cable 48.

A brake cable 23 for transmitting a braking force is connected to a base 21 of the foot lever 20 by a connection bracket 22, and a free end of the foot lever 20 is fixedly provided with a pedal 24 having a tread surface 24a facing the operator's leg. I have.

Partial tooth member 30 disposed on the base 21 of the foot lever 20
Has one end 32 pivotally connected to the base 21 of the foot lever 20.
The sector teeth 31 are pivotally attached by 33, and are carved so as to be substantially centered on the pivot shaft 20a of the foot lever 20.

An arm-shaped stopper 34 protrudes from an end 32 of the partial tooth member 30, and a stopper receiving portion 25 that limits the partial tooth member 30 to the release position is formed on the base 21 of the foot lever 20. Further, a pin-shaped stopper 26 for receiving a back portion 35 on the other end side of the partial tooth member 30 is implanted in the base bracket 11.

The partial tooth member 30 is swingably limited to 26, 34 between a braking position where the engagement angle between the claw end 41 of the claw member 40 and the sector tooth 31 is large, and a release position where the engagement angle is small. It is arranged as follows.

The stopper 26 provided at the braking position and the back 35 of the partial tooth member 30
When the brake is released, a damper 27 made of an elastic material slightly separated by a gap g of about 0.3 to 0.5
An urging spring 28 that is provided in the vicinity of 26 and causes the back 35 of the partial tooth member 30 to abut on the damper 27 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 teeth 31 of the partial tooth member 30 has a base end formed by a pivot shaft 43 at the base bracket 11.
The pusher 47 of the release member 46 that constitutes the release mechanism 45 faces the swing end 42 that extends in the form of an arm from the pivot shaft 43. Also, the swing end 42 and the base bracket
A spring 42a that urges the claw member 40 in a direction in which the claw end 41 meshes with the sector teeth 31 of the partial tooth member 30 is stretched between them.

The release member 46 is pivotally supported by the base bracket 11 by a pivot shaft 46a, and a pressing element 47 is formed near the pivot shaft 46a, and a release cable 48 is fixed to the free end 46b. I have.

 Next, the operation will be described.

As shown by the solid lines in FIGS. 1, 4 and 5, when the foot lever 20 is in the released state before being depressed, the sector teeth 31 of the partial tooth member 30 provided on the base 21 of the foot lever 20 and the claw are formed. No braking reaction force is applied between the claw end 41 of the member 40 and
The back portion 35 of the partial tooth member 30 is slightly separated from the stopper 26 by the gap g due to the elasticity of the damper 27.

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

The partial tooth member 30 also moves with the swing of the foot lever 20, and the claw end 41 moves over the sector teeth 31 of the partial tooth member 30 due to the relative displacement with the claw member 40. When climbing over, the claw member 40 swings and a hitting sound is generated, but the damper 27
The pronunciation is kept low by the buffering action of.

When the pedal of the foot lever 20 is sufficiently depressed and the force applied to the foot is loosened, the foot lever 20 attempts to return, and the sector teeth 31 of the partial tooth member 30 and the pawl end 41 of the pawl member 40 receive a braking reaction force. The brake cable 23 is engaged, and the brake cable 23 is kept in the reduced braking state.

As the braking force is applied to the sector teeth 31 of the partial tooth member 30 and the claw end 41 of the claw member 40 by loosening the force applied to the foot,
The damper 27 holding the other end of the partial tooth member 30 is bent, the gap g is eliminated, and the partial tooth member abuts the stopper 26 at the 30 braking position to receive the braking reaction force.

In the braking state, the engagement angle is large, so the claw member 40
Claw end 41 is securely engaged with and locked to sector teeth 31 of 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 causes the claw member 40 to release.
Is rotated by a small angle in a direction in which the claw end 41 comes off the sector teeth 31 of the partial tooth member 30.

That is, when the release handle 49 is grasped and pulled, the release cable 48 is contracted, and the release member 46 rotates. When the release member 46 is rotated, the swinging end of the claw member 40 is
42, the claw member 40 has the claw end 41 at the sector tooth of the partial tooth member 30.
It rotates in the direction away from 31.

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

As shown by the imaginary line in FIG. 5, when the damper 27 is fully extended, the partial tooth member is caused by the sliding resistance of the meshing portion due to the braking reaction force.
30 further follows the claw member 40, and the claw member 40 further rotates, so that the stopper 34 of the partial tooth member 30 is in the release position and the foot lever is
When it comes into contact with the stopper receiving portion 25 of the base portion 21 of the base member 20, it cannot be followed, and the claw end 41 of the claw member 40 is
Get off.

The engagement angle between the claw end 41 of the claw member 40 and the sector tooth 31 of the partial tooth member 30 when the claw member 40 is disengaged is reduced, and the claw end 41 is easily disengaged by the reduced amount, and the claw member 40 is released with a small releasing force. Claw end 41 of sector tooth 31 of partial tooth member 30 comes off.

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 to release the braking.

According to the foot-operated parking brake device of the present invention, the claw end of the claw member meshes with the sector tooth of the partial tooth member at a large meshing angle at the time of braking, and the partial tooth member has a small meshing angle at the time of braking release. Since the claw end of the claw member is disengaged from the sector teeth of the second member, the sector teeth of the partial tooth member and the claw end of the claw member are securely engaged in the braking state to maintain a safe braking state, and are light when the braking is released. It can be released by operating force and the release sound is small because the playing phenomenon is also small. Also, the noise is reduced because the damper suppresses the sound of the pawl members during the braking operation.

[Brief description of the drawings]

1 to 5 show one embodiment of the present invention.
Fig. 2 is a front view of the foot-operated parking brake device, Fig. 2 is a view taken in the direction of arrow II in Fig. 1, Fig. 3 is an exploded perspective view of a main part showing the vicinity of a partial tooth member at the base of the foot lever, and Fig. 4 is the same. FIG. 5 is an explanatory view showing a meshing state between the partial tooth member and the claw member, and FIG. 6 is an explanatory diagram showing a meshing state between the partial tooth member and the claw member in the prior art. 10 Foot-operated parking brake device 11 Base bracket, 20 Foot lever 21 Base 23 Brake cable 24 Pedal 25 Stopper receiving part 26 Stopper 27 Damper 30 ... partial tooth member, 31 ... sector teeth 32 ... end part 33 ... pivot 34 ... stopper 40 ... claw member 41 ... claw end 42 ... swinging end 45 ... release mechanism 46 ... Release member 48 ... Release cable 49 ... Release handle

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoru Masuda 3-7-77, Tarumachi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Otsuka Koki Co., Ltd. (72) Inventor Tadahiro Shoji 3 Tarumachi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture No. 7-77 Otsuka Koki Co., Ltd. (56) References JP-A-1-269650 (JP, A) JP-A-2-40661 (JP, U) JP-A-3-86877 (JP, U) ( 58) Field surveyed (Int.Cl. ⁷ , DB name) B60T 7/06

Claims (1)

(57) [Claims] A base of a foot lever is pivotally supported on a base fixed to a vehicle body, and a tip thereof is extended under a foot to provide a pedal at a tip, and a brake cable is extended and contracted in accordance with the swing of the foot lever. A step-type parking brake device for applying a brake, wherein a partial tooth member having sector teeth is swingably pivotally connected to a base of the foot lever, and a pawl end meshing with the sector teeth is provided. A pawl member that can be disengaged and operated is swingably disposed on the base, and the partial tooth member has a large engaging angle between the claw end of the pawl member and the sector tooth, and the meshing angle is A stopper that abuts one end of the partial tooth member to limit the partial tooth member to the release position so as to be able to swing between a small release position and a brake that abuts the other end portion to brake the partial tooth member. Limit to position At the release position, abuts with the partial tooth member, and a gap of a predetermined distance is provided between the partial tooth member and the stopper on the braking position side, and the partial tooth member is in the release position. A damper made of an elastic material, which is arranged to abut on the partial tooth member prior to the stopper on the braking position side when swinging from the brake position to the braking position. Foot-operated parking brake device.