JPH0347221B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a foot pedal that is provided near the floor of an automobile and has a foot lever that generates a braking force and is locked, and a locking mechanism for the foot lever. This invention relates to a type parking brake device.

"Prior Art" As a conventional foot-operated parking brake device, there is one shown in FIG. 5, for example.

That is, a brake cable 2 connected to a brake part is connected to one end of the foot lever 1,
When the foot pedal 3 is stepped on, the foot lever 1 rotates and the brake cable 2 is squeezed.
A locking member 5 is provided that engages and disengages from a sector 4 formed at the base of the locking member 5. The locking member 5 is biased clockwise in the figure by a biasing spring 6 that is hooked at one end, and a release button is attached to the other end. The cable 7 is connected and the foot lever 1
A pawl 5a formed at a portion facing the sector 4 engages with and disengages from the teeth 4a of the sector 4.

When the pawl 5a of the locking member 5 and the teeth 4a of the sector 4 of the foot lever 1 are engaged, the pawl 5a protrudes inward from the trajectory of the pawl 5a to prevent the pawl 5a from coming off, so that the engagement is not released inadvertently. Then, the tooth profile is set so that the tooth 4a has a meshing allowance 4b that interferes with the pawl 5a.

"Problems to be Solved by the Invention" However, in such a conventional foot-operated parking brake device, the release cable 7 is pulled from the braking state, the locking member 5 is rotated counterclockwise, and the pawl 5a and the foot pedal are connected. Tooth 4a of sector 4 of lever 1
In order to release the engagement with the brake cable 2, it is necessary to rotate the foot lever 1 in the direction of squeezing the brake cable 2 by the amount of engagement 4b between the teeth 4a.
The force required at this time is nothing but the braking reaction force transmitted by the brake cable 2, which requires a large operating force and is heavy and has poor operability.If you try to increase the operating force using the principle of leverage, the locking member
However, since the release cable 7 becomes large in size, it is impossible to do so due to space considerations, and the operation stroke of the release cable 7 becomes large, resulting in poor operability and an increase in weight.

The present invention has been made in view of these conventional problems.The present invention solves the above problems by providing a locking mechanism that allows the engaged claws to be easily separated from the teeth of the sector of the foot lever and that fits in a small space. The object of the present invention is to provide a foot-operated parking brake device that solves the problems.

"Means for Solving Problems" The gist of the present invention for achieving the above object is to provide a foot lever that is installed near the floor of an automobile and is locked by generating a braking force, and a foot lever that is locked by generating a braking force. In a foot-operated parking brake device having a lever locking mechanism, the locking mechanism is pivotably attached to a housing and has a sector that is linked to the foot lever, and a sector that is close to the sector and is swingable to the housing. a locking member having a claw that engages with and disengages from the teeth of the sector and is pivotally supported on the operation member, the locking member comprising:
A direction in which the locking member swings within a predetermined range limited by a swing regulating portion provided on the operating member and an engaging portion provided on the housing, and the claw engages with the sector. The locking member is pivoted to the operating member, and the operating member is placed in a restraining position in which the claw of the locking member in contact with its swing regulating portion engages with the tooth of the sector; The rotation restricting portion is pivotally connected to be able to swing to a release position where the rotation restricting portion is separated from the locking member so that the pawl is released from the teeth of the sector, and the operating member is biased by an elastic member in the direction of the restraining position, and the operation is performed. When the member is in the restraining position, the pivot of the locking member is located on the opposite side of the sector from a straight line connecting the point where a load is applied to the claw of the locking member and the pivot of the operating member, and the locking member stops, and The locking member is disposed on the operating member so that when the operating member is swung to the release position, the pivot of the locking member is displaced beyond the straight line to the sector side, and the forward movement member is brought to the release position. In some cases, the engaging portion is disposed in the housing so as to interfere with the locking member in order to cause the pawl of the locking member on which a braking reaction force is applied in the direction of separation from the sector tooth to separate from the sector tooth. The feature lies in the foot-operated parking brake device.

"Operation" When the claw of the locking member that is in contact with the rotation restriction part of the operating member engages and locks the sector tooth of the foot lever, the operating member is restrained by the biasing force of the elastic member. kept in position.

When the operating member is in the restraining position, the pivot of the locking member is located on the opposite side of the sector from the straight line connecting the point where the load is applied to the claw of the locking member and the pivot of the operating member, and the locking member is stopped.

In this case, the braking reaction force applied to the foot lever is
The pivot of the locking member is pushed in a direction away from the sector on the opposite side of the sector, and the pawl of the locking member, which is regulated by the swing regulating portion, acts in a direction to engage with the tooth of the sector.

Thereby, the foot lever is reliably locked by the operating member and the locking member, and is locked in a state where a braking force is generated.

When the operating member is swung from the restraint position to the release position against the elastic member or braking reaction force, the pivot of the locking member connects the point where the load is applied to the pawl of the locking member and the pivot of the operating member. It is displaced to the sector side beyond the straight line.

Thereby, the braking reaction force acts so that the locking member tilts relative to the operating member in a direction away from the swing regulating portion, and the pawl of the locking member separates from the tooth of the sector. Subsequently, the engagement state between the pawl of the locking member and the tooth of the sector changes, and the locking member interferes with the engagement portion of the operating member, allowing the pawl to easily separate from the tooth of the sector without interfering with the meshing allowance. You can leave.

“Embodiment” An embodiment of the present invention will be described below based on the drawings.

1 to 4 show an embodiment of the present invention, in which a parking brake device 10 has a foot lever 30 pivotally attached to a housing 20 fixed to a vehicle body A such as a dash panel, and a base end of the foot lever 30. An operating member 40 is also pivotally connected to the housing 20 in the vicinity of the operating member 4, and a locking member 50 that engages and disengages from a sector 35 formed on the foot lever 30 is connected to the operating member 4.
A release handle 60 is pivotally supported on the housing 20 and is slidably supported by the housing 20 for engaging and disengaging the operating member 40. A release knob 61 is provided at the tip of the release handle 60.
is permanently installed.

The foot lever 30 is pivotally connected to the housing 20 via a pivot 31, is biased counterclockwise in FIGS.
Brake cable B connected to the braking unit at one end
are connected to each other, and a footboard 34 is attached to the tip.

A sector 35 is formed on one side of the base end 33 of the foot lever 30, and the sector 35 and the operating member 40
and the locking member 50 form a locking mechanism for the foot lever 30.

The operating member 40 is pivotally attached to the housing 20 via a pivot 41, and the locking member 50
is pivotally supported by the operating member 40 so that it can swing within a predetermined range, limited by a pin-shaped engaging portion 56 protruding from the housing 20 and a swing regulating portion that also serves as the pivot shaft 41. .

More specifically, the operating member 40 is such that the claw 51 of the locking member 50 is connected to the sector 35 of the foot lever 30.
The locking member 50 is arranged so as to face the teeth 35a of the locking member 50 and is in contact with the swing regulating portion which also serves as the pivot 41.
It is pivoted to the housing 20 via the pivot shaft 41 so as to be swingable between a locking position where the pawl 51 of the locking member 50 engages with the tooth 35a of the sector 35 and a release position where the pawl 51 of the locking member 50 separates from the tooth 35a of the sector 35. It is worn.

The operating member 40 is biased toward the restraining position, which is counterclockwise in FIGS.
0, and a release cable 62 is connected to one end thereof.
A release cable 62 is connected to the release handle 60.

The locking member 50 locks the sector 3 when a release operation is performed to swing the operating member 40, which is in the locking position in FIG. 1, clockwise to the release position shown in FIG.
It is pivotally supported by the operating member 40 via a pivot shaft 52 provided at a position close to the tooth 35a of No. 5.

A claw 51 is formed at the tip of the locking member 50, and the rear end of the locking member 50 has a regulated end 53 that comes into contact with a swing regulating portion that also serves as the pivot 41 when the operating member 40 is in the restraining position. A biasing spring 54 that biases the locking member 50 in the locking direction, which is clockwise in FIGS. 1 and 2, is stretched between the regulated end 53 and the housing 20.

The positional relationship between the pivot shaft 41 of the operating member 40, the pivot shaft 52 of the locking member 50, and the point c where a load is applied to the claw 51 during locking is such that the operating member 40 is in the restraining position and the claw 5 is
1 is engaged and locked with the teeth 35a of the sector 35, the pivot 52 of the locking member 50 is located on the opposite side of the sector 35 across the line d connecting the pivot 41 and point c. The locking member 50 is arranged so that the pivot shaft 52 of the locking member 50 is displaced toward the sector 35 beyond the line d when the locking member 50 is stopped and the operating member 40 is swung to the release position.

A sliding surface 55 is formed near the pawl 51 of the locking member 50, and a pin-shaped engagement portion 56 is fixed that interferes with the sliding surface 55 so that the pawl 51 separates from the teeth 35a of the sector 35 during a release operation. Housing part 2
It is set protrudingly at 0.

A buffer member 21 that receives the arm portion 36 of the foot lever 30 upon return is fixed to the housing 20, and a brake detection switch 22 is also fixed to the housing 20.

Next, the action will be explained.

As shown in FIGS. 1 and 2, when the foot lever 30 is in the braking state, the pivot 52 is connected to the pivot 4.
It is located on the opposite side of the sector 35 away from the sector 35 from the line d connecting point 1 and point c, and the regulated end 53 is regulated by coming into contact with the swing regulating part which also serves as the pivot shaft 41, and the braking from the brake cable B is regulated. The reaction force that causes the foot lever 30 to swing counterclockwise is transmitted to the locking member 50 and the operating member 40 from point c.

At that time, the center of the axis 52 is located at the sector 35 from the point d.
Since it is on the opposite side of the sector 35 away from the sector 35, said force acts to move the pivot 52 further away from the sector 35, causing the pivot 41 to receive the resulting load from the restricted end 53 of the locking member 50, and to The stop member 50 does not return to the release direction in which the claw 51 separates from the tooth 35a of the sector 35.

Claw 51 of locking member 50 and tooth 35a of sector 35
In the relationship between the operating member 40 and the locking member 5
Similar to the conventional example, the setting is such that there is an engagement allowance so that a component force that would push the 0 and 0 integrally in the counterclockwise direction does not occur.

To release the brake, hold the release knob 61 of the release handle 60, pull the release cable 62, and swing the operating member 40 clockwise in the figure against resistance due to the biasing force of the spring 42 or the braking reaction force. Then, the operating member 40 swings around the pivot 41 to the release position, and the pivot 52 of the locking member 50 moves to the sector 35.
, the locking member 50 swings counterclockwise against resistance while keeping the claw 51 engaged with the tooth 35a of the sector 35.

When the pivot 52 crosses the line d, the braking reaction force reverses itself and urges the locking member 50 to swing counterclockwise, so that the pawl of the locking member separates from the tooth of the sector. The locking member 50 is inverted until the sliding surface 55 comes into contact with the engaging portion 56, resulting in the state shown in FIG. 3.

The operating force required to reverse this is the release cable 62.
However, since the relationship between the pivot 41, the pivot 52, and the point c forms a kind of toggle mechanism, the force applied to the pivot 52 is small.

When the state shown in FIG. 3 is reached, the meshing allowance is at a position where there is no interference, and as shown in FIG. 40
When further swung, the sliding surface 55 comes into sliding contact with the engaging portion 56, prompting the locking member 50 to swing counterclockwise, and the tip of the pawl 51 touches one surface of the tooth 35a of the sector 35. It will slide and eventually break free of this surface and become unlocked.

As a result, the foot lever 30 is released, so the foot lever 30 swings counterclockwise in FIGS. 1 and 2 to loosen the brake cable B and release the brake.

When the brake is not released, the operating member 40 is returned to its original state by the biasing force of the spring 42, and the pawl 51 of the locking member 50 is engaged with the tooth 35a of the sector 35.

To perform a braking operation, for example, if the brake is not yet in the complete braking state as shown in FIG. 1, the foot lever 30 will further swing clockwise by depressing the footplate 34.
According to this rotation, the sector 35 also swings, and the locking member 5
0's claw 51 climbs over the teeth 35a of the sector 35, but when the sector 35 tries to return, it is locked, so it is stopped and restrained.

When the foot lever 30 swings, its base end 3
3, the brake cable B is pulled and the brake section is braked. Note that it goes without saying that the sector 35 interlocked with the foot lever 30 is carved into the base of the foot lever 30.

"Effects of the Invention" According to the foot-operated parking brake device according to the present invention, when releasing the brake, the operating member is reversed to change the engagement state between the sector teeth and the claw of the operating member, so that they can be easily engaged and disengaged. At the same time, since a small operating force is required during the reversal, and it can fit in a small space, the parking brake device is easy to operate and requires only a small operating force, and it is also compact and lightweight. It can be made into a

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the present invention; Figure 1 is a front view of the main parts of the parking brake device, Figure 2 is a front view of the entire parking brake device, and Figure 3 is an enlarged view of the locking mechanism. A front view, FIG. 4 is an explanatory view showing the meshing relationship between the pawl of the locking member and the teeth of the sector, and FIG. 5 is a front view of the main part of a conventional parking brake device. DESCRIPTION OF SYMBOLS 10... Parking brake device, 30... Foot lever, 35... Sector, 40... Operating member, 41...
Pivot, 50...locking member, 51...claw, 56...engaging portion.

Claims (1)

[Scope of Claims] 1. A foot-operated parking brake device having a foot-operated lever that is installed near the floor of an automobile and is locked by generating a braking force, and a locking mechanism for the foot-operated lever, comprising: the locking mechanism. a sector that is pivotally connected to the housing and interlocks with the foot lever; an operating member that is swingably provided on the housing in proximity to the sector; and a claw that engages and disengages from teeth of the sector. a locking member pivotally supported on the operating member, the locking member being configured by a swing regulating portion provided on the operating member and an engaging portion provided on the housing; The claw swings within a predetermined range while being pivoted to the operating member by urging the claw in a direction to engage the sector; The locking member is pivotably pivoted between a restraining position in which the claw of the locking member engages with the tooth of the sector and a release position in which the rotation restriction portion separates from the locking member so that the claw of the locking member disengages from the tooth of the sector. the movable member is urged in the direction of the restraint position by an elastic member, and when the movable member is in the restraint position, the point where the load is applied to the pawl of the locking member and the pivot of the movable member are connected. When the pivot of the locking member is located on the opposite side of the sector from the straight line and is stopped, and the operating member is swung to the release position, the pivot of the locking member is displaced beyond the straight line toward the sector. A locking member is disposed on the operating member, and when the operating member reaches a release position, a pawl of the locking member on which a braking reaction force is applied in a direction of detachment from the sector teeth is disengaged from the sector teeth. . A foot-operated parking brake device, characterized in that the engaging portion is disposed in the housing so as to interfere with the locking member.