JPH0311086Y2 - - Google Patents

Description

[Detailed description of the invention] "Industrial application field" The present invention consists of a foot lever that is installed near the floor of an automobile and is locked by generating a braking force, and a release knob that releases the lock of the foot lever. The present invention relates to a foot-operated parking brake device.

``Conventional technology'' A foot-operated parking brake device is a device that continuously brakes a car by stepping on a foot lever with the foot, generating braking force using the pedaling force, and stopping and locking the foot lever at an appropriate position. Generally, the brake is released by operating a release knob and releasing the foot lever.

With conventional foot-operated parking brake devices,
When the foot lever returns after being released from the lock, the return spring and the repulsive force from the brake unit overlap, resulting in a large reaction.

``Problem to be solved'' However, in conventional foot-operated parking brake devices like this, when the foot lever returns, it generates a large impact that hits each part, and in order to increase durability, the strength of each part must be increased. This necessity increases the size and cost of the device, and there are also problems in that mud and the like adhering to the foot lever can scatter into the passenger compartment, causing discomfort.

The present invention was developed by focusing on these conventional problems, and is designed to cushion the recoil of the foot lever.
The object of the present invention is to provide a foot-operated parking brake device that solves the above problems by reducing impact.

``Means for Solving the Problems'' The gist of the present invention to achieve this purpose is to provide a foot lever that is installed near the floor of an automobile and is locked by generating a braking force, and the foot lever. In a foot-operated parking brake device having a release knob for releasing the lock of the foot lever, a buffer member is provided between the foot lever and a non-operating portion to reduce the reaction that occurs when the foot lever is unlocked, and the buffer member a cylinder connected to either one of the foot lever and the non-operating part, a rod connected to the other that moves in and out of the cylinder part, and a piston body that is provided at the tip of the rod and slides within the cylinder. The piston body is formed by a wedge portion integral with the rod and a widening member that fits into a tapered surface of the wedge portion, and the widening member has at least two diameters so as to be expandable. A sliding shoe is fixed on the circumferential surface of the divided piece, and as the piston body slides, the divided pieces of the widening member are pushed by the tapered surface of the wedge part to mutually expand in width and slide. The present invention relates to a foot-operated parking brake device, characterized in that a contact shoe is brought into pressure contact with an inner wall of the cylinder.

"Operation" When the piston body of the buffer member slides inside the cylinder, the tapered surface of the wedge member does not fit into the widening member when the foot lever is depressed, so there is less resistance, and when the foot lever returns. The tapered surface of the wedge member fits into the width-expanding member, causing the divided pieces to mutually expand in width, and the sliding shoe presses against the inner wall of the cylinder, increasing sliding resistance and exhibiting a buffering effect, and the foot lever is This is designed to effectively buffer the recoil when returning.

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

As shown in FIG. 3, in the parking brake device 10, a foot lever 12 is pivotally attached to a housing 11 fixed to a vehicle body A such as a dash panel, and a stop lever 14 for locking a sector 13 interlocked with the foot lever 12 is attached to the housing 11, which is fixed to a vehicle body A such as a dash panel. A release lever 15 is pivotally connected to the housing 11 and is slidably supported on the housing 11 for engaging and disengaging the stopper lever 14.
6 is fixedly installed.

The foot lever 12 is biased counterclockwise in the figure by a spring 12a, has a base end 12b connected to a cable B, and a tip end mounted with a footboard 12c. The locking pawl 14a of the stopper lever 14 can be engaged with and detached from the teeth 13a of the sector 13, and the spring 13b
is biased in the engaging direction by the stopper lever 14.
The distal end 15 of the release lever 15 is attached to the release end 14b of the release end 14b.
a is disposed so as to be engageable from the release direction, and the release lever 15 is normally urged in the non-engagement direction by a spring 15b.

A buffer member 20 is installed between the arm portion 12d of the foot lever 12 and the base portion of the housing 11, which is a non-operating portion.

As shown in FIGS. 4 and 5, the buffer member 20 includes a sealed cylinder 30, a rod 50 that enters and exits from the cylinder 30, and a piston body 60 that is provided at the tip of the rod 50 and slides within the cylinder 30. The piston 40 is made up of:

A connecting block 32 is solidified by closing one end of the cylindrical portion 31 of the cylinder 30. A connecting ring 33 is formed on the connecting block 32, and its base is caulked and fixed via an O-ring 32a.

A rod 5 of a piston 40 is attached to the other end of the cylindrical portion 31.
A closing member 34 through which 0 is inserted is fixed by caulking. The closing member 34 includes closing plates 34a, 34
b, and an O-ring 35 that seals the outside and an O-ring 36 that is in close contact with the rod 50 are sandwiched between them. A connecting ring portion 51 is formed at one end of the rod 50 protruding from the cylinder 30, and a piston body 60 is attached to the other end.

As shown in FIG. 1, FIG. 2, FIG. 4, and FIG. It is partitioned into a chamber 37 and a second air chamber 38.

The wedge portion 61 is formed with a tapered surface 61a that is thick at the tip and gradually becomes thinner toward the rear end.
There is a gap between the outer periphery and the inner wall of the cylindrical portion 31 that allows a considerable amount of air to pass through.

The width expanding member 62 is a tapered surface 61a of the wedge portion 61.
As shown in FIG. 2, it is divided into two parts, and each of the divided pieces 63 is in a positional relationship that allows them to expand each other, and each of the divided pieces 6
A sliding shoe 64 that can be press-contacted to the inner surface of the cylindrical portion 31 is fixed to the circumferential surface of the tube portion 3 , 63 . Even when not in pressure contact, the sliding shoe 64 is in light contact with the inner wall of the cylindrical portion 31, and there is a gap between the divided pieces 63, 63 that allows a considerable amount of air to pass through, and the rear end of the widening member 62 is E-ring 65 fitted into the ring groove of rod 50
is restricted.

The connecting ring 33 of the buffer member 20 is connected to the base of the housing 11, and the connecting ring portion 51
is connected to the intermediate portion of the arm portion 12d.

Next, the effect will be explained.

As shown in FIG. 3, when the foot lever 12 is in the non-braking state, the rod 50 protrudes from the cylinder 30, and the volume of the first air chamber 37 is small and the volume of the second air chamber 38 is large. ing. When the footboard 12c is stepped on, the rod 50 is pushed in and the piston body 60 moves toward the connecting block 32. Since the gaps between each part are considerably large, air moves from the second air chamber 38 to the first air chamber 37 without resistance, the piston main body 60 can be easily moved, and the foot lever 12 can be easily depressed to the first air chamber 37. In FIG. 3, the buffer member 20 is stopped at the position shown by the dashed line, and the buffer member 20 is approximately in the state shown in FIGS. 4 and 5.

As the foot lever 12 rotates, the sector 13 also rotates, and the locking pawl 14a of the stopper lever 14 passes over the teeth 13a of the sector 13, but when the sector 13 tries to return, it is locked, so it is stopped as described above. be done. In addition, the base end 1 of the foot lever 12
Cable B is pulled by 2b, and the wheels are braked.

To release the brake, pull the release knob 16 of the release lever 15. Then, the distal end 15a pushes the release end 14b, and the locking claw 14a of the stopper lever 14 releases the tooth 13a of the sector 13.
The foot lever 12 is rotated counterclockwise in FIG. 3 by the elastic force of the spring 12a and the reaction force of the cable B.

While the foot lever 12 rotates counterclockwise, the piston body 60 moves rightward from the state shown in FIGS. 4 and 5.

Then, as shown in FIG. 6, since the sliding shoe 64 of the divided piece 63 of the widening member 62 is in light contact with the inner wall of the cylindrical portion 31, the wedge portion 61 is moved relative to the widening member 62. moves a minute amount to taper surface 6
1a expands the divided piece 63 outward, and slides into the sliding contact shoe 6.
4 comes into pressure contact with the inner wall of the cylindrical portion 31 a little more strongly.

In this case, the tapered surface 61a of the wedge portion 61 will fit more strongly into the tip of the divided piece 63, so that the divided pieces 63, 63 will be further expanded in width, and the sliding shoe 64 will come into contact with the inner wall of the cylindrical portion 31 considerably. The strong pressure contact results in a large sliding resistance when the rod 50 slides, and the sliding resistance buffers the elastic force of the spring 12a and the reaction force of the cable B.

The release lever 15 is pulled back by the release knob 16 until the foot lever 12 returns to its original state. During this time, the engagement between the locking pawl 14a of the stopper lever 14 and the spring 13b of the sector 13 is released. When the release knob 16 is released, the release lever 15 returns due to the elastic force of the spring 15b, the stopper lever 14 returns due to the elastic force of the spring 13b, and the locking claw 14a returns.
becomes capable of locking the tooth 13a of the sector 13.

"Effects of the Invention" According to the foot-operated parking brake device according to the present invention, since the buffer member effectively buffers the reaction when the foot lever returns,
The impact load on each part is extremely small, which is not only advantageous in terms of strength, but also reduces weight and cost, and eliminates the scattering of mud and the like.

[Brief explanation of drawings]

Each figure shows one embodiment of the present invention, and FIG. 1 is a longitudinal cross-sectional view of the main part of the buffer member, and FIG.
Figure 3 is a front view of the parking brake device, Figure 4 is a front view of the buffer member, Figure 5 is a cross-sectional view of the line position.
The figure is a longitudinal cross-sectional view of the buffer member, and FIG. 6 is a longitudinal cross-sectional view of essential parts for explaining the function of the buffer member. 10... Parking brake device, 12... Foot lever, 15... Release lever, 16... Release knob, 20... Buffer member, 30... Cylinder, 4
0...Piston, 50...Rod, 60...Piston body, 61...Wedge portion, 61a...Tapered surface, 62...Expanding member, 63...Divided piece, 64...
...Sliding contact.

Claims (1)

[Scope of utility model registration request] In a foot-operated parking brake device that is installed near the floor of an automobile and has a foot lever that generates a braking force and is locked, and a release knob that releases the lock of the foot lever, when the foot lever is released from the lock. A buffer member for reducing the reaction that occurs is installed between the foot lever and the non-operating part, and the buffer member is connected to a cylinder connected to either one of the foot lever or the non-operating part, and a cylinder connected to the other. Consisting of a rod that enters and exits the cylinder part, and a piston that is provided at the tip of the rod and consists of a piston body that slides within the cylinder,
The piston body is formed of a wedge portion integral with the rod and a widening member that fits into a tapered surface of the wedge portion, and the widening member is divided into at least two parts so as to be expandable, and A sliding shoe is fixed on the circumferential surface, and as the piston body slides, the divided pieces of the widening member are pushed by the tapered surface of the wedge part to mutually widen, and the sliding shoe contacts the inner wall of the cylinder. A foot-operated parking brake device characterized by being in pressure contact with.