JPH024851Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a foot-operated parking brake operating device, and is particularly applicable not only to braking operations but also to
The present invention relates to an operating device in which a release operation is also performed using the foot.

Conventionally, foot-operated parking brake operating devices have been configured so that braking is performed using the foot and release operation is performed using the hand. The present applicant has developed several operating devices of this type and is currently filing applications. This type of operating device generally has a pedal arm, which is provided at the lower end of the pedal arm rotatable about a first pivot center line that is substantially horizontal, that has a second pivot arm that is substantially parallel to the first pivot center line. A brake pedal is provided with a pedal pad rotatably attached around a center line of rotation, and the brake pedal is operated by applying a pedal force to a portion of the pedal pad below the second center line of rotation. Therefore, the parking brake connected to the pedal arm is activated, and the pedal arm is held in the depressed position by the return prevention mechanism, so that the parking brake is maintained in the activated state. The return operation is performed by applying a pressing force to a portion of the pedal pad above the second rotation center line and rotating the pedal pad in a direction opposite to the rotation direction of the pedal arm at the time of the depression operation. The pedal arm is configured to be released from being held by the blocking mechanism.

Therefore, when braking, it is necessary to depress the brake pedal while being careful not to rotate the pedal pad. However, it is unavoidable that the forward inclination angle of the pedal pad decreases as the brake pedal rotates, and in the deep depression position, the pedal pad becomes close to vertical or tilts backward beyond vertical. It's normal. In order to apply pressure only to the lower part of the pedal pad in this situation, it is necessary to bend the ankle sharply so that the angle between the toe and the shin becomes smaller, and this type of operation can hardly be called comfortable. .
Furthermore, after the parking brake is applied, it is necessary to remove the foot from the pedal pad while being careful not to apply pressure to the upper part of the brake pad, and in this respect too, conventional operating devices are desirable from an ergonomic point of view. I couldn't say it was a thing. In other words, if you unconsciously take your foot off the pedal pad, it is normal that a pressing force will inevitably be applied to the upper part of the pedal pad, and the operator will consciously avoid this situation and This is because I needed to take my foot off the pedal pad.

The present invention was developed against the background of the above-mentioned circumstances, and its purpose is to:
A foot-operated parking brake operating device that releases the parking brake with the foot,
To provide a brake pedal that can be operated comfortably and does not require any special attention even when the foot is released from the brake pedal.

The gist of the present invention is that the pedal arm is rotatably provided around a first rotation center line and is to be operatively connected to the parking brake, and the foot pedal pad is fixed to the lower end of the pedal arm. A foot-operated parking brake operating device including a brake pedal with a brake pedal and a return prevention mechanism that prevents the brake pedal from returning to a parking brake non-action position when the brake pedal is depressed to a parking brake application position. A release arm extending from a lower position of the arm in a direction substantially perpendicular to the longitudinal direction of the pedal arm is attached to the brake pedal so as to be rotatable about a second rotation center line substantially parallel to the longitudinal direction of the pedal arm. A release pad is attached to the free end of the release arm in such a manner that the release pad is located on the side of the pedal pad, and the rotational movement of the release pad based on the pedal force applied to the release pad is applied to the return prevention mechanism. The reason lies in the provision of a transmission mechanism that transmits the signal and puts it in a non-operating state.

In this way, braking can be performed by applying pedal force to the pedal pad fixed to the lower end of the pedal arm. There is no longer any need to pay attention to this, and braking operations can be performed comfortably and stably as before. Moreover, the release operation can be performed by depressing a dedicated release pad provided on the side of the pedal pad with the same foot used to operate the pedal pad.

Furthermore, the release arm that supports the release pad is provided so as to extend from a position below the pedal pad in a direction substantially perpendicular to the longitudinal direction of the pedal arm, and the release pad is attached to the free end of the release arm that protrudes from below the pedal pad. Because,
A relatively long release arm is used to reduce the angle change when the release pad is depressed, improving the operability of the release pad, while making the width of the combined pad part of the pedal pad and release pad relatively small, making it easier to use the service brake. This makes it possible to avoid interference with the operating brake pedal.

Furthermore, the fact that the center line of rotation of the release arm is approximately parallel to the longitudinal direction of the pedal arm means that even if the shaft for supporting the release arm is sufficiently long, the width of the entire operating device can be avoided. This results in the advantage that the release arm can be attached sufficiently firmly to the pedal pad or pedal arm.

Embodiments of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, reference numerals 10 and 12 are brackets that are arranged opposite to each other and fastened to each other at regular intervals by bolts 14, 14, 14, etc., and the outer periphery of one of the brackets 10 is The tip of the brake cable outer casing 16 is fixed to a flange formed on the other bracket 12, and a sector 20 having ratchet teeth 18 formed along an arc is fixed to the inner lower part of the other bracket 12 by rivets 22, 22. ing.

A pedal arm 24 is inserted between the pair of brackets 10, 12, and its intermediate portion is rotatably attached to the brackets 10, 12 with bolts 26 or the like. In this embodiment, the axis of the bolt 26 is the rotation center line (first rotation center line) of the pedal arm 24. A terminal 30 of a brake cable 28 is connected to the tip of the pedal arm 24.
4 is rotated, the same cable 28 is tightened. Note that 32 is a stopper that is fixed to the brackets 10 and 12 and defines the return end of the pedal arm 24.

At a portion of the pedal arm 24 located below the ratchet teeth 18, a bell crank-shaped pole 38 having an operating arm 34 and an engaging arm 36 is mounted around an axis 40 parallel to the bolt 26. It is rotatably mounted. A claw portion 42 that protrudes toward the sector 20 is provided at the tip of the operating arm 34.
is formed, and the pawl 38 is adapted to mesh with the ratchet teeth 18 of the sector 20 at this pawl portion 42. On the other hand, the engagement arm 36 has a pole 3
One end of each of a torsion spring 44 that urges the claw portion 42 of No. 8 toward the sector 20 and a torsion spring 46 that urges the claw portion 42 away from the sector 20 are engaged. The biasing force of the torsion spring 44 is set larger than that of the other torsion spring 46, so that the pole 38 normally
It is in a state where it is pressed to 0. The torsion spring 44 has a central circular portion supported by a pin 48 fixed to the pedal arm 24, and an end portion that engages with the pawl 38 is bent toward the pedal arm 24, and this bent portion is bent toward the pedal arm 24. It is brought into contact with the lower end surface of the engagement arm 36 of the pawl 38, and the other end is brought into contact with the inner surface of a cover 50 attached to the pedal arm 24. Note that the cover 50 is attached to the pedal arm 2 by the mounting pin 52, the shaft 40, and the pin 48.
It is attached to 4. On the other hand, the center circular portion of the torsion spring 46 is fitted into the boss portion of the pawl 38, and one end portion is bent away from the pedal arm 24 so that the same portion comes into contact with the upper end surface of the engagement arm 36. The other end is brought into contact with the outer peripheral surface of the pin 48.

A pedal pad 54 is fixed to the lower end of the pedal arm 24, and together they constitute a parking brake pedal. As shown in detail in FIGS. 2 to 5, the pedal pad 54 includes a base plate 56 fixed to the pedal arm 24 by welding;
It consists of a rubber anti-slip member 58 fixed to the upper surface by adhesive. The base plate 56 is welded to the pedal arm 24 at its upper left corner, and a pair of bearings 60 are provided at its right side. The bearing portions 60 extend from the upper right corner and the lower right corner of the base plate 56 and are opposed to each other in the vertical direction. is inserted. The axis 64 of this shaft 62 is on the right side of the center line 66 of the pedal pad 54 and is parallel to the longitudinal direction of the pedal arm 24. This axis 6
2, a boss portion 70 of the release arm 68 is rotatably fitted into the release arm 68, and the release arm 68 extends from the boss portion 70 at right angles to the longitudinal direction of the pedal arm 24 and passes through the vicinity of the lower end of the pedal arm 24. and extends to the left side of the pedal arm 24. Release arm 6
8 is rotatable around an axis 64 of a shaft 62, and in this embodiment, this axis 6
4 is a rotation center line (second rotation center line) of the pedal arm 24. Since the axis 62 is parallel to the longitudinal direction of the pedal arm 24 as described above, the rotation center line of the release arm 68 is also parallel to the longitudinal direction of the pedal arm 24. A release pad 72 is fixed to the free end of the release arm 68 that is removed from the pedal pad 54. The release pad 72 is made up of a base plate 74 and a rubber anti-slip member 76 glued to the top surface of the base plate 74, and is similar to the pedal pad 5.
It is located adjacent to the left side of 4. The release arm 68 is always urged to rotate upwardly by a torsion spring 78 attached to the boss portion 70, and normally, as shown in FIG. It is kept in the original position of contact. In this original position, the surface 80 of the release pad 72 is higher than the surface 82 of the pedal pad 54, and as shown by the two-dot chain line in FIG. The lever can be depressed to a release position lower than the surface 82. This release position is achieved by the base plate 74 of the release pad 72 coming into contact with the ear 84 which extends to the left from the base plate 56 of the pedal pad 54, as shown most clearly in FIG. It is becoming more and more regulated.

An operating arm 86 extends upwardly from the base plate 74 of the release pad 72 in parallel with the pedal arm 24, and a hook 88 formed at its tip connects the bent end of the torsion spring 44 with a minute interval. When the release pad 72 is pushed into the release position against the biasing force of the torsion spring 78, the hook 88 engages with the bent end of the torsion spring 44 and Connect the end to the pole 38
It is configured to separate from the engagement arm 36 of.

Next, the operation of the above device will be explained.

When it becomes necessary to operate the parking brake, the driver places his foot on the pedal pad 54 and performs a depressing operation. As a result, the pedal arm 24 rotates around the bolt 26, the brake cable 28 is tightened, and the parking brake connected to the end thereof is activated. pedal pad 5
4 is depressed, the release pad 72 is in its original position and the hook 88 of the actuation arm 86 is separated from the bent end of the torsion spring 44. Therefore, the pawl 38 is biased in the direction in which the pawl 42 engages with the ratchet teeth 18 of the sector 20, and as the pedal arm 24 rotates, the pawl 38 moves while successively overcoming the ratchet teeth 18, and as described above. As shown, when the foot is released from the pedal pad 54 after the parking brake is applied, the ratchet tooth 18
, and serves to prevent the pedal arm 24 from returning to its original position. That is, in this embodiment, the pedal is operated by the sector 20 provided with the ratchet teeth 18, the pawl 38 provided with the pawl portion 42, and the torsion spring 44 that biases the pawl 38 in the direction of engaging the ratchet teeth. This constitutes a mechanism for preventing the arm 24 from returning.

If it becomes necessary to deactivate the parking brake that is in the applied state, press the pedal pad 5.
4 and the release pad 72 (or only on the release pad 72), press the release pad 72 from its original position to the release position, and apply pedal force to the pedal pad 54 (or release pad 72). After pressing slightly in the direction of brake application,
All you have to do is get your feet back. When the release pad 72 is depressed to the release position, the hook 88 of the working arm 86 engages the bent end of the torsion spring 44 and separates it from the engagement arm 36 of the pawl 38. As a result, the pawl 38 is in a state where it receives the biasing force only from the torsion spring 46, and the claw portion 42 engages the ratchet tooth 1.
8 will be biased in the direction away from. That is, in this embodiment, by the working arm 86 and the bent end of the torsion spring 44 that engages with the working arm 86,
A transmission mechanism is configured to transmit the rotational movement of the release pad 72 to the return prevention mechanism of the pedal arm 24. However, if the rotational movement of the release pad 72 is only transmitted to the return prevention mechanism, the pawl 38
does not separate from the ratchet teeth 18. paul 38
Because a meshing force based on the tension of the brake cable 28 and the tension of a return spring provided to return the pedal arm 24 to the non-braking position is acting between the pawl portion 42 and the ratchet tooth 18. , the pawl 38 will not separate from the ratchet teeth 18 only by operating the release pad 72 to the release position. The pawl 38 is not released until the upper pedal pad 54 (or the release pad 72), which has been operated by the release pad 72, is slightly depressed in the brake application direction to eliminate the meshing force between the pawl portion 42 and the ratchet teeth 18. Due to the biasing force of the torsion spring 46, the pawl portion 42 is rotated clockwise in FIG. Therefore, if you then return your foot while keeping the release pad 72 in the release position, the pawl 38 will not engage the sector 20 and the pedal arm 24 will be released.
will return to the brake non-applying position.

In the operating device of this embodiment, the center line of the pedal pad 54 is shifted to the right side from the pedal arm 24, and the shaft 62 supporting the release arm 68 is
is located further to the right of its centerline, while the release pad 72 is located to the left of the pedal pad 54. Therefore, the release arm 68 can be made relatively long, and the angle change when the release pad 72 is depressed can be made relatively small. Moreover, the release arm 68 is effectively accommodated below the pedal pad 54 and the release pad 72, and the increase in the width of the entire pedal section due to the presence of the release arm 68 is suppressed to the utmost.

Further, the shaft 62 that supports the release arm 68 is also quite long, and the release arm 68 is stably supported at the long boss portion 70, which is also effectively stored below the pedal pad 54.
There is no need to increase the size of the entire operating device.

Note that in the above embodiment, the release arm 68
is attached to the base plate 56 of the pedal pad 54, but could also be attached to the pedal arm 24. Further, in the above embodiment, the operating arm 86 is fixed to the base plate 74 of the release pad 72,
The rotational movement of the release pad 72 was transmitted to the return prevention mechanism, but by attaching the operating arm 86 to the release arm 68, etc.
It is also possible to transmit the rotational movement of the movement to the return prevention mechanism. In short, all that is required is for the rotational movement of the release pad 72 to be transmitted to the return prevention mechanism.

Further, in the above embodiment, the pedal arm 24 was configured to be able to rotate around the bolt 26, which does not rotate, but the shaft is fixed to the pedal arm 24 in a non-rotatable manner, and the shaft is connected to the bracket 10,
It is also possible to make it rotatably supported by 12 or the like. In short, it is sufficient that the pedal arm 24 is rotatable around the bolt 26 or the first rotation center line, which is the axis of the shaft fixed to the pedal arm 24. The same can be said of the release arm 68, and the release arm 68 only needs to be rotatable around a second rotation center line parallel to the longitudinal direction of the pedal arm 24.

Although no other examples will be given, it goes without saying that the present invention can be implemented in various modifications and improvements without departing from the scope of the claims for utility model registration.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a part of a foot-operated parking brake operating device, which is an embodiment of the present invention, in cross section. FIG. 2 is a front view of the pad portion of the operating device, and FIGS. 3 and 4 are views taken along arrows A and B in FIG. 2, respectively. Fifth
The figure shows the anti-slip members 58 and 76 in FIG.
FIG. 2 is an exploded perspective view with the parts removed. 18: Ratchet tooth, 20: Sector, 24: Pedal arm, 38: Pole, 44, 46: Torsion spring, 54: Pedal pad, 62: Axis, 64: Axis line, 68: Release arm, 72: Release pad, 8
6: Working arm.

Claims (1)

[Claims for Utility Model Registration] The pedal arm is rotatable around a first rotation center line and is operatively connected to a parking brake, and includes a foot pedal pad fixed to the lower end of the pedal arm. The foot-operated parking brake operating device includes: a brake pedal that has been depressed; and a return prevention mechanism that prevents the brake pedal from returning to a parking brake non-applying position when the brake pedal is depressed to the parking brake applying position; A release arm extending from a lower position of the pedal pad in a direction substantially perpendicular to the longitudinal direction of the pedal arm is attached to the brake pedal so as to be rotatable about a second rotation center line substantially parallel to the longitudinal direction of the pedal arm. a release pad is attached to the free end of the release arm in a state where the release pad is located to the side of the pedal pad, and
An operating device comprising a transmission mechanism that transmits rotational movement of the release pad based on a pedal force applied to the release pad to the return prevention mechanism to put the prevention mechanism in an inactive state.