JP2017030702A - Foot-operated parking brake operating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foot-operated parking brake operating device arranged on an automobile, which can reduce sound generated when rotations of a pole for releasing engaging to a saw blade of a ratchet member to return to an initial state is stopped by contacting with a stopper.SOLUTION: A foot-operated parking brake operation device 1 has a pedal support 10; an operation pedal 20; a ratchet member 30; a pole 40; a pole spring 50; and a pole stopper 55. By the stepping operation of the operation pedal 20, a parking brake is actuated through a brake cable C. The pole 40 has an abutting portion 42, and a long hole portion 45 having a load receiving portion 46 and a shock absorbing portion 47. An abutting surface S on the abutting portion 42 is formed so as to extend along a first virtual line IA intersecting a second virtual line IB extending in a longitudinal direction of the long hole portion 45 at an orthogonal intersection angle α.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a foot-operated parking brake operating device disposed in an automobile.

  2. Description of the Related Art Conventionally, a foot-operated parking brake operating device has an operation pedal to be stepped, a ratchet member attached to the operation pedal, a pole rotatably supported by a support pin, and an urging force to the pole. A pole urging member to be applied, and by rotating the operation pedal accompanying a stepping operation, the pole is rotated around the support pin to engage with or release the mesh of the sawtooth of the ratchet member. By doing so, the operation of the parking brake is switched.

  In such a foot-operated parking brake operation device, the pole is rotatably supported by inserting a support shaft through a long hole formed in the pole, and the rotation center of the pole is one end of the long hole. The direction of the urging force of the pole urging member that acts on the pole can be switched by moving from one end to the other end. The foot-operated parking brake operating device switches the direction of the urging force of the pole urging member acting on the pole each time the operation pedal is depressed, thereby releasing the meshing of the pawl or the meshing of the ratchet member. It is comprised so that it may carry out alternately.

  Further, in the foot-operated parking brake operation device, a sound generated when the braking force of the parking brake is applied / released is regarded as a problem. As an invention made for the purpose of reducing this sound, for example, Patent Document 1 The invention described in Patent Document 2 is known. In the inventions described in Patent Document 1 and Patent Document 2, when the engagement of the pole with the ratchet member is released along with the stepping operation of the operation pedal, the pole moves vigorously along the longitudinal direction of the elongated hole. It is made for the purpose of reducing the abnormal noise which generate | occur | produces by the contact of the longitudinal direction edge part and support pin in a long hole.

  Specifically, in the inventions described in Patent Document 1 and Patent Document 2, the long hole-shaped shaft hole formed in the pole is provided with a buffer wall or a vibration-proof rubber at the longitudinal end, and the shaft Absorbing the impact of the support shaft (that is, the support pin) that vigorously moves along the inside of the hole with a buffer wall or vibration-proof rubber, noise caused by contact between the shaft hole inner surface and the support shaft is reduced. ing.

JP 2005-297722 A Japanese Patent Laid-Open No. 2002-302024

  However, when releasing the meshing of the pole with the ratchet member and returning to the initial state with the stepping operation of the operation pedal, the pole not only slides along the longitudinal direction of the slot, but also the support pin inside the slot Rotate around. In this case, the rotation of the pawl is stopped by contact with the stopper member, and the pawl returns to an initial state in which it can mesh with the sawtooth of the ratchet. Then, since the force accompanying the contact with the stopper member acts on the pole, the pole moves also in the direction intersecting the longitudinal direction of the elongated hole.

  As described above, in the inventions described in Patent Document 1 and Patent Document 2, the long hole-shaped shaft hole formed in the pole is provided with a buffer wall and a vibration-proof rubber at the end in the longitudinal direction. The noise generated by the contact between the shaft hole and the support shaft during sliding movement along the longitudinal direction of the shaft hole can be reduced.

  However, in the direction crossing the longitudinal direction (for example, the short direction of the shaft hole), since the buffer wall or the like is not arranged, the rotation of the pole when returning to the initial state is caused by the contact with the stopper member. When stopped, the inner surface of the shaft hole and the support shaft may come into contact with each other and generate abnormal noise. In addition, when the braking force of the parking brake is large, a load receiving portion made of metal or the like may be formed on the inner surface of the shaft hole in order to receive the reaction force of the brake cable. Since the abnormal noise due to the contact between the configured load receiving portion and the support shaft becomes large, it is necessary to further reduce the abnormal noise.

  The present invention relates to a foot-operated parking brake operating device disposed in an automobile, and when the rotation of a pawl when the ratchet member is disengaged from the saw teeth and returned to the initial state is stopped by contact with the stopper member. Provided is a foot-operated parking brake operation device that can reduce noise generated in the vehicle.

  A foot-operated parking brake operating device according to one aspect of the present invention is supported by a pedal support disposed on a vehicle body and rotatably supported around a support shaft of the pedal support in a predetermined direction around the support shaft. An operation pedal that activates a parking brake via a brake cable by a stepping operation, and a plurality of pedals that are integrally disposed with respect to the operation pedal and that are formed along an arc shape centered on the support shaft A ratchet member having a saw tooth and a support pin disposed on the pedal support and extending in parallel with the support shaft are rotatably disposed, and meshed with the saw tooth of the ratchet member, whereby the operation pedal is A pawl for preventing rotation in a direction opposite to a predetermined direction and maintaining the parking brake in an operating state; and a ratchet member A foot-operated parking brake operating device having a pole urging member that urges the pole in a predetermined rotational direction that meshes with a tooth, and maintaining a braking force in which the saw tooth of the ratchet member and the pole are engaged When the operation pedal is rotated in a predetermined direction, the support pin is released when the engagement of the ratchet member with the saw blade is released and the parking brake is released from the initial state. A stopper member that abuts on the pawl rotating around and stops the pawl rotation, and the pawl is in the state change including the initial state and the braking force maintaining state. In order to support the pole so that it can rotate with respect to the support and is slidable, there is an elongated hole portion inserted through the support pin and the braking force maintaining state. A contact portion that contacts the stopper member when the pole is returned to the initial state, and the elongated hole portion is a surface extending along the longitudinal direction of the inner peripheral surface of the elongated hole. And a contact surface of the contact portion is formed so as to extend in a direction orthogonal to the longitudinal direction of the elongated hole portion. It is characterized by.

  The foot-operated parking brake operating device has a pedal support, an operating pedal, a ratchet member, a pole, and a pole urging member. When the operating pedal is stepped on, the parking brake is operated via a brake cable. Can be activated. According to the foot-operated parking brake operating device, the operating pedal is moved by engaging the saw tooth of the ratchet member integrally disposed with the operating pedal and the pole urged by the pole urging member. The parking brake can be maintained in an operating state by preventing rotation in the direction opposite to the predetermined direction. In the foot-operated parking brake operating device, the pole has an elongated hole portion and an abutting portion, and the elongated hole portion is inserted by a support pin, so that it rotates with respect to the pedal support. It is possible and supported so as to be slidable. Further, in the foot-operated parking brake operating device, the stopper member is provided with the ratchet member in accordance with the rotation of the operation pedal in a predetermined direction from a braking force maintaining state in which the sawtooth of the ratchet member and the pawl are engaged. When the engagement with the saw blade is released to return to the initial state in which the braking of the parking brake is released, the rotation of the pole comes into contact with the contact portion of the pole that rotates around the support pin. To stop. Here, according to the foot-operated parking brake operating device, the contact surface of the contact portion is formed to extend in a direction orthogonal to the longitudinal direction of the elongated hole portion, so that the braking force is maintained. When returning from the initial state to the initial state, the force acting on the pole due to contact with the stopper member has no component in the short direction of the long hole portion (that is, the direction perpendicular to the long direction of the long hole portion), and is long. It can be made to act in a direction parallel to the longitudinal direction of the hole. Thus, according to the foot-operated parking brake operating device, the support pin does not relatively move in the short-side direction in the long hole portion, and thus has a metal load receiving portion on the inner peripheral surface of the long hole portion. Even in this case, the contact between the load receiving portion and the support pin is suppressed, and the sound generated when the rotation of the pole when returning to the initial state is stopped by the contact with the stopper member is reduced. Can do.

  In addition, a foot-operated parking brake operating device according to another aspect of the present invention is supported by a pedal support disposed on a vehicle body and rotatably supported around a support shaft of the pedal support. An operation pedal that activates a parking brake via a brake cable by a stepping operation in a direction, and is integrally disposed with respect to the operation pedal, and is formed along an arc shape centering on the support shaft. The ratchet member having a plurality of saw teeth and a support pin disposed on the pedal support and extending in parallel with the support shaft are rotatably disposed, and meshed with the saw teeth of the ratchet member. A pole for preventing the pedal from rotating in a direction opposite to the predetermined direction and maintaining the parking brake in an operating state; and the ratchet A foot-operated parking brake operating device having a pole urging member for urging the pole in a predetermined rotation direction that meshes with a saw blade of a material, wherein the saw blade of the ratchet member and the pole are engaged with each other. When the operation of the operation pedal is rotated in a predetermined direction from the power maintaining state to release the meshing with the sawtooth of the ratchet member and return to the initial state where the parking brake is released, A stopper member that contacts the pawl rotating around the support pin and stops the pawl rotation, and the pawl is in a state change including the initial state and the braking force maintaining state, In order to support the pole so as to be able to rotate and slide with respect to the pedal support, an elongated hole portion inserted through the support pin, and maintaining the braking force A contact portion that contacts the stopper member when the pole is returned from the state to the initial state, and the elongated hole portion extends along the longitudinal direction of the inner peripheral surface of the elongated hole portion. A metal load receiving portion disposed on one side of the extending surface and a resin buffer disposed so as to include a portion of the inner peripheral surface of the elongated hole portion that faces the load receiving portion. A contact surface of the contact portion is formed so as to extend in a direction intersecting at an acute angle with respect to the longitudinal direction of the elongated hole portion.

  The foot-operated parking brake operating device has a pedal support, an operating pedal, a ratchet member, a pole, and a pole urging member. When the operating pedal is stepped on, the parking brake is operated via a brake cable. Can be activated. According to the foot-operated parking brake operating device, the operating pedal is moved by engaging the saw tooth of the ratchet member integrally disposed with the operating pedal and the pole urged by the pole urging member. The parking brake can be maintained in an operating state by preventing rotation in the direction opposite to the predetermined direction. And in the foot-operated parking brake operating device, the pole has a long hole portion having a load receiving portion and a buffer portion, and a contact portion, and the long hole portion is inserted by a support pin, The pedal support is rotatable and supported so as to be slidable. Further, in the foot-operated parking brake operating device, the stopper member is provided with the ratchet member in accordance with the rotation of the operation pedal in a predetermined direction from a braking force maintaining state in which the sawtooth of the ratchet member and the pawl are engaged. When the engagement with the saw blade is released to return to the initial state in which the braking of the parking brake is released, the rotation of the pole comes into contact with the contact portion of the pole that rotates around the support pin. To stop. Here, according to the foot-operated parking brake operating device, the contact surface of the contact portion is formed so as to extend in a direction that intersects at an acute angle with respect to the longitudinal direction of the elongated hole portion. When returning from the power maintenance state to the initial state, the force acting on the pole due to contact with the stopper member is such that the component in the short direction of the long hole portion is small and the component in the long direction of the long hole portion is large. Can act on. As a result, according to the foot-operated parking brake operating device, the support pin relatively moves in the short direction in the elongated hole portion, but at least after contacting the buffer portion, it contacts the metal load receiving portion. Therefore, even when there is a metal load receiving part on the inner peripheral surface of the long hole part, the sound generated when the rotation of the pole when returning to the initial state is stopped by contact with the stopper member is generated. Can be reduced.

  Further, in the foot-operated parking brake operating device according to another aspect of the present invention, the load receiving portion is configured so that the elongated hole is caused by the action of the tension of the brake cable when the pawl is in the braking force maintaining state. One of the inner peripheral surfaces of the portion extending along the longitudinal direction, wherein the support pin is disposed on the inner peripheral surface of the elongated hole portion. To do.

  According to the foot-operated parking brake operating device, when the braking force is maintained, the load applied to the inner peripheral surface of the elongated hole portion by the support pin is received by the metal load receiving portion due to the tension of the brake cable. Therefore, the deformation | transformation of the internal peripheral surface of a long hole part, etc. can be suppressed, and the application | coating operation | movement and cancellation | release operation | movement of a braking force by a foot-operated parking brake operating device can be performed appropriately. Further, according to the foot-operated parking brake operating device, a metal load receiving portion is provided on the inner peripheral surface of the elongated hole portion to suppress deformation of the inner peripheral surface of the elongated hole portion, It is possible to simultaneously reduce the sound generated when the rotation of the pole when returning to the state is stopped by contact with the stopper member.

  This invention has a pedal support, an operation pedal, a ratchet member, a pole, a pole urging member, and a stopper member, and operates the parking brake via a brake cable by stepping on the operation pedal. Let Since the contact surface of the contact portion of the pole is formed to extend in a direction perpendicular to the longitudinal direction of the elongated hole portion, the braking force maintaining state where the saw tooth of the ratchet member and the pole are engaged with each other is obtained. When the engagement of the ratchet member with the saw blade is released to return to the initial state in which the braking of the parking brake is released, the force acting on the pole by contact with the stopper member is reduced by the short hole portion. There is no component in the direction, and it acts in a direction parallel to the longitudinal direction of the slot. Even when the inner peripheral surface of the elongated hole portion of the pole has a metal load receiving portion, the rotation of the pole when returning to the initial state is suppressed by preventing the load receiving portion and the support pin from contacting each other. Is reduced when it is stopped by contact with the stopper member.

It is a side view showing a schematic structure of a foot type parking brake operation device concerning a 1st embodiment. It is explanatory drawing which shows operation | movement of the pole at the time of braking operation of the operating pedal which concerns on 1st Embodiment. It is explanatory drawing which shows the pole of the braking force maintenance state which concerns on 1st Embodiment. It is explanatory drawing which shows operation | movement of the pole at the time of the brake release operation of the operating pedal which concerns on 1st Embodiment. It is explanatory drawing which shows the pole in the pole initial position which concerns on 1st Embodiment. It is explanatory drawing regarding the structure of the long hole part of the pole which concerns on 1st Embodiment. It is explanatory drawing regarding the structure of the contact part of the pole which concerns on 1st Embodiment. It is explanatory drawing regarding the structure of the contact part of the pole which concerns on 2nd Embodiment.

(First embodiment)
Hereinafter, an embodiment (first embodiment) in which a foot-operated parking brake operating device according to the present invention is applied to a foot-operated parking brake operating device 1 will be described in detail with reference to the drawings.

(Schematic configuration of foot-operated parking brake operating device)
First, a schematic configuration of the foot-operated parking brake operating device 1 according to the first embodiment will be described in detail with reference to the drawings. FIG. 1 is a side view showing a schematic configuration of the foot-operated parking brake operating device 1 so that the configuration inside the pedal support 10 can be understood.

  The foot-operated parking brake operation device 1 according to the first embodiment is fixed to a dash panel (not shown) that separates the engine room and the vehicle interior, and includes a pedal support 10, an operation pedal 20, and a ratchet member. 30, a pole 40, a pole spring 50, and a pole stopper 55. The foot-operated parking brake operating device 1 operates a parking brake via a brake cable C by stepping on an operation pedal 20 that is rotatably supported with respect to a pedal support 10 to The brake force is applied and the brake force is released.

  The pedal support 10 is fixed to the passenger compartment side of the dash panel using bolts or the like, and has a pair of side plates that face each other at an interval in the vehicle width direction. The pedal support 10 includes a support shaft 11, a support pin 12, and a pedal stopper 13.

  The support shaft 11 is disposed on the pedal support 10 so as to extend between the pair of side plates of the pedal support 10 so as to be substantially horizontal and substantially parallel to the vehicle width direction. The upper part of the pedal 20 is supported rotatably.

  The support pin 12 is disposed between the pair of side plates of the pedal support 10 so as to extend in parallel with the support shaft 11 at the upper front side of the vehicle with respect to the support shaft 11, and the pole 40 can be rotated. I support it. The pedal stopper 13 is formed at the lower part of the pair of side plates in the pedal support 10 and comes into contact with the operation pedal 20 supported so as to be rotatable around the support shaft 11, whereby the initial position of the operation pedal 20 (FIG. 1). Middle, position indicated by solid line).

  The operation pedal 20 is formed into a predetermined shape by bending a metal plate material with a press, and is supported by the support shaft 11 so as to be rotatable with respect to the pedal support 10. The operation pedal 20 is used when switching between applying braking force and releasing braking force by the parking brake, and includes a step portion 21, a base plate portion 22, a ratchet mounting portion 23, a reset operation piece 24, a guide member. 25.

  The step portion 21 is disposed at the lower end portion of the operation pedal 20, and is configured by a pedal pad or the like that is depressed by the driver. The base plate portion 22 constitutes the upper portion of the operation pedal 20 and is formed in a flat plate shape that extends substantially at a right angle to the support shaft 11. The support shaft 11 is located at the central portion of the base plate portion 22 and functions as the rotation center of the operation pedal 20.

  The ratchet mounting portion 23 is a flat portion to which a ratchet member 30 to be described later is mounted, and the upper front of the operation pedal 20 is crank-shaped with respect to the base plate portion 22 in the plate thickness direction (that is, the vehicle width direction). It is formed by bending. The reset operation piece 24 is formed on the front side of the vehicle with respect to the ratchet mounting portion 23, and is disposed so as to come into contact with the pawl 40 when releasing the braking force of the parking brake. The guide member 25 is integrally fixed to one side surface (the back surface side in FIG. 1) of the base plate portion 22 by welding or the like, and the brake cable C is wound around and the brake cable C is operated by the operation pedal. 20 is fixed.

  Accordingly, when the step portion 21 is depressed by the driver and the operation pedal 20 is stepped on, the operation pedal 20 rotates in the first rotation direction RA around the support shaft 11 and pulls the brake cable C. Can do. By pulling the brake cable C, a parking brake disposed in the vehicle can be operated to apply a braking force to the wheels of the vehicle. The operation pedal 20 is provided with a return spring (not shown), and biases the operation pedal 20 in the second rotation direction RB opposite to the first rotation direction RA. Yes.

  The ratchet member 30 is integrally fixed to the ratchet mounting portion 23 of the operation pedal 20 by a pair of rivets 32, and has a large number of saw teeth 31. The ratchet member 30 is configured to move around the support shaft 11 with the rotation of the operation pedal 20 so that a pole 40 and a saw tooth 31 described later mesh with each other.

  A large number of saw blades 31 are arranged along an arc shape centered on the support shaft 11 at the front edge of the ratchet member 30, and each saw blade 31 starts braking regardless of meshing with the pole 40. It is formed as inclined teeth so that the stepping operation of the operation pedal 20 at the time is allowed.

  The pole 40 is rotatably supported around the support pin 12 of the pedal support 10, and has a claw portion 41, a contact portion 42, and a long hole portion 45. The pole 40 is biased so as to rotate around the support pin 12 in a predetermined direction by a pole spring 50 described later, and the claw portion 41 is configured to mesh with the saw tooth 31 of the ratchet member 30. The pole 40 is rotatable around the support pin 12 between a pole initial position (see FIGS. 1 and 5) and a lock release position (see FIG. 4). At the intermediate position (see FIGS. 2 and 3), the claw portion 41 is configured to be kept in mesh with the saw tooth 31 of the ratchet member 30.

  Here, the initial position of the pole is a state in which the claw portion 41 of the pole 40 can be engaged with the saw tooth 31 of the ratchet member 30, and is defined by bringing the contact portion 42 into contact with a pole stopper 55 described later. The unlocking position is a position where the pawl portion 41 of the pole 40 is separated from the sawtooth 31 of the ratchet member 30 and is a state where the braking force of the parking brake is released.

  The contact portion 42 releases the engagement between the saw blade 31 and the claw portion 41 by rotating the pole 40 around the support pin 12 from the state where the claw portion 41 is engaged with the saw blade 31 of the ratchet member 30. In this case, it has a contact surface S that comes into contact with a pole stopper 55 described later. The abutting portion 42 abuts on the pole stopper 55 to define the initial pole position of the pole 40. The specific configuration of the contact portion 42 will be described later in detail with reference to the drawings.

  The long hole portion 45 is formed so as to penetrate the pole 40 in the plate thickness direction, and is inserted by the support pin 12 of the pedal support 10. The long hole portion 45 has a long dimension in a predetermined direction and is formed in a long hole shape having a short dimension in a direction perpendicular to the long dimension. Therefore, by inserting the support pin 12 into the elongated hole portion 45, the pole 40 can be rotated with respect to the pedal support 10 and supported so as to be slidable in the longitudinal direction of the elongated hole portion 45. Has been. A metal load receiving portion 46 and a resin buffer portion 47 are disposed on the inner peripheral surface of the elongated hole portion 45. These points will be described in detail later with reference to the drawings.

  The pole spring 50 is constituted by a torsion coil spring, and urges the pole 40 supported so as to be rotatable around the support pin 12. One end of the pole spring 50 is hooked on the pole 40, and the other end of the pole spring 50 is hooked on the pedal support 10. Therefore, the pole spring 50 can switch the direction of action of the biasing force (pole biasing force FP) according to the state of the pole 40 rotating around the support pin 12. The pole spring 50 corresponds to a pole urging member in the present invention.

  The pole stopper 55 is fixed to the pedal support 10 in the upper part of the support pin 12, and abuts on the pole 40 that rotates around the support pin 12 by the pole urging force FP of the pole spring 50. By contacting the part 42, the initial pole position of the pole 40 is defined.

(Operation when applying braking force of parking brake)
Next, the operation when applying the braking force of the parking brake in the above-described foot-operated parking brake operating device 1 will be described in detail with reference to FIGS. In the following description, as shown in FIG. 1, the foot-operated parking brake operating device 1 has the operation pedal 20 in the initial position and the pole 40 in the initial position. And

  When the driver depresses the operation pedal 20 and performs a stepping operation from the state shown in FIG. 1, the operation pedal 20 rotates in the first rotation direction RA around the support shaft 11, and accordingly, the ratchet member 30. Also moves around the support shaft 11 in the first rotation direction RA. Since the brake cable C is pulled by the rotation of the operation pedal 20 in the first rotation direction RA, the braking force of the parking brake is applied to the vehicle.

  As shown in FIG. 2, as the ratchet member 30 moves in the first rotation direction RA, the pawl portion 41 of the pole 40 is engaged with the saw tooth 31 from the front end side of the ratchet member 30. Here, since the pole 40 is supported so as to be able to get over the saw tooth 31 while swinging against the pole biasing force FP of the pole spring 50, the operation pedal 20 in the first rotation direction RA is supported. It is allowed to continue the rotation operation.

  Then, when the rotation of the operation pedal 20 in the first rotation direction RA is stopped and the driver removes the foot from the operation pedal 20, the tension of the brake cable C and the urging force of the return spring (not shown) are applied. The operation pedal 20 rotates in the second rotation direction RB (see FIG. 3). At this time, as the ratchet member 30 moves in the second rotation direction RB, the pawl portion 41 of the pole 40 meshes firmly with the saw teeth 31 of the ratchet member 30 in the second rotation direction RB. The operation pedal 20 is prevented from rotating.

  At this time, the position of the support pin 12 inside the elongated hole portion 45 moves from one end side to the other end side by the action of the tension of the brake cable C and the urging force of the return spring (not shown). That is, when the pole 40 moves around the support shaft 11 in the second rotation direction RB, the rotation center of the pole 40 (the center of the support pin 12) is moved around the support shaft 11 inside the elongated hole portion 45. Because of displacement in the rotational direction RA, the direction of application of the pole biasing force FP of the pole spring 50 is switched. Thereby, since the foot-operated parking brake operating device 1 is maintained in the meshing state between the pole 40 and the saw blade 31 based on the tension of the brake cable C, the parking brake is maintained in the operating state. Note that a state where the application of the braking force of the parking brake to the vehicle is referred to as a braking force maintaining state.

(Operation when releasing the braking force of the parking brake)
Next, the operation when releasing the braking force of the parking brake in the above-described foot-operated parking brake operating device 1 will be described in detail with reference to FIGS. 4 and 5.

  When canceling the braking force of the parking brake, the driver again performs the stepping operation of the operation pedal 20 on the foot-operated parking brake operation device 1 in the above-described braking force maintaining state, so that the operation pedal 20 is turned on. Turn in one turning direction RA. As shown in FIG. 4, the ratchet member 30 moves in the first rotation direction RA along with the rotation of the operation pedal 20, thereby releasing the meshing pressure between the claw portion 41 and the saw tooth 31. According to the pole urging force FP of the pole spring 50, it rotates around the support pin 12 in a predetermined direction (counterclockwise in FIG. 4). As a result, the claw portion 41 of the pole 40 cannot be engaged with the sawtooth 31 of the ratchet member 30, so that the operation pedal 20 is allowed to rotate in the second rotation direction RB.

  The tension of the brake cable C and the urging force of a return spring (not shown) are applied to the operation pedal 20 that is allowed to rotate in the second rotation direction RB. Accordingly, when the driver removes his / her foot from the step portion 21, the operation pedal 20 rotates in the second rotation direction RB according to the tension of the brake cable C or the like. The operation pedal 20 rotates in the second rotation direction RB until it contacts the pedal stopper 13 of the pedal support 10 and returns to the initial position. As a result, the foot-operated parking brake operating device 1 can release the braking force of the parking brake generated through the tension of the brake cable C.

  The reset operation piece 24 of the operation pedal 20 abuts on the pole 40 in the process of rotating the operation pedal 20 in the second rotation direction RB until the operation pedal 20 reaches the initial position, so that the pole 40 is moved around the support pin 12. Rotate to return to the initial pole position (see FIG. 5). In the process of turning the pole 40 toward the initial pole position, the position of the support pin 12 inside the elongated hole portion 45 is moved from the other end side to the one end side by the action of the pole biasing force FP of the pole spring 50. . That is, when the pole 40 moves around the support shaft 11 in the first rotation direction RA, the rotation center of the pole 40 (the center of the support pin 12) is moved around the support shaft 11 inside the elongated hole 45. Because of displacement in the rotational direction RB, the direction of application of the pole biasing force FP of the pole spring 50 is switched.

(Concrete configuration of pole hole)
Here, in the foot-operated parking brake operating device 1 according to the first embodiment, a specific configuration of the long hole portion 45 of the pole 40 will be described in detail with reference to FIG. As described above, the elongated hole portion 45 of the pole 40 is inserted through the support pin 12 of the pedal support 10 and cooperates with the support pin 12 so as to rotatably support the pole 40.

  As shown in FIG. 6, a load receiving portion 46 and a buffer portion 47 are disposed on the inner peripheral surface of the long hole portion 45. As described above, in the braking force maintaining state in which the braking force of the parking brake is applied, the tension of the brake cable C acts on the pole 40 via the ratchet member 30 and the pole of the pole spring 50 is applied. The biasing force FP acts. That is, the cable load LC based on the tension of the brake cable C acts on the pole 40, and the support shaft side load LS toward the support shaft 11 and the pole side load LP toward the support pin 12 act. Accordingly, since the pole 40 moves relative to the support pin 12 of the pedal support 10, the support pin 12 comes into contact with the inner peripheral surface of the elongated hole portion 45, and the cable load LC or the like acts. It will be.

  Here, the load receiving portion 46 is one surface (vehicle rear side) extending along the longitudinal direction of the inner peripheral surface of the elongated hole portion 45, and is a portion with which the support pin 12 comes into contact with the action of the pole side load LP. It is comprised by the metal which has the hardness which can endure pole side load LP. Therefore, the metal load receiving portion 46 can prevent the inner peripheral surface of the elongated hole portion 45 from being deformed by the tension of the brake cable C acting on the support pin 12. Thereby, since the smoothness of the operation | movement of the pole 40 in the foot-operated parking brake operating device 1 can be ensured, it is possible to reliably apply the braking force and release the braking force by the parking brake.

  And the buffer part 47 is arrange | positioned in the part except the load receiving part 46 among the internal peripheral surfaces of the elongate hole part 45, and is comprised by hard synthetic resin. The buffer portion 47 is disposed with a certain thickness on the inner peripheral surface of the elongated hole portion 45, and plays a role of reducing the contact sound of the support pin 12 with respect to the inner peripheral surface of the elongated hole portion 45.

(Specific configuration of the contact part of the pole)
A specific configuration of the contact portion 42 of the pole 40 in the first embodiment will be described in detail with reference to FIG. As described above, when releasing the braking force of the parking brake, if the operation pedal 20 is rotated in the first rotation direction RA and the reset operation piece 24 is brought into contact with the pole 40, the pole 40 is supported. It rotates around the pin 12. By the rotation of the pole 40 at this time, the contact portion 42 (specifically, the contact surface S) of the pole 40 contacts the pole stopper 55 and positions the pole 40 at the initial pole position.

  As shown in FIG. 7, the abutment surface S of the abutment portion 42 includes a first imaginary line IA extending along the abutment surface S and a second imaginary direction indicating the longitudinal direction of the elongated hole portion 45 of the pole 40. The line IB is formed to have an intersecting angle α that forms a right angle in a side view. Here, when the pawl 40 rotates around the support pin 12 and the abutting portion 42 abuts on the pole stopper 55, the abutting surface S of the abutting portion 42 is in relation to the abutting surface S. Thus, a vertical force FA is input from the pole stopper 55. Therefore, the pole 40 can move relative to the pedal support 10 according to the direction of the force FA input from the pole stopper 55 after contacting the pole stopper 55.

  The contact surface S of the contact portion 42 in the first embodiment is along the first imaginary line IA that forms an intersecting angle α perpendicular to the second imaginary line IB extending along the longitudinal direction of the elongated hole portion 45. Since it extends, the direction of the force FA acting on the contact surface S of the contact portion 42 by the contact with the pole stopper 55 is parallel to the longitudinal direction of the long hole portion 45. Therefore, when the pole 40 moves relative to the pedal support 10 by the contact with the pole stopper 55, the pole 40 moves in the direction along the longitudinal direction of the elongated hole portion 45.

  As shown in FIG. 7, since the load receiving portion 46 on the inner peripheral surface of the long hole portion 45 is disposed on one surface side along the longitudinal direction on the vehicle rear side, the support pin 12 is connected to the load receiving portion 46. It will move in the direction along the surface and will not collide against the load receiving portion 46. Further, the force FA acts in parallel to the longitudinal direction of the long hole portion 45 (that is, the direction in which the second virtual line IB extends), and does not have a component that intersects the longitudinal direction of the long hole portion 45. The support pin 12 is surely moved along the surface of the load receiving portion 46. That is, according to the foot-operated parking brake operating device 1 according to the first embodiment, even when the metal load receiving portion 46 is disposed on the inner peripheral surface of the elongated hole portion 45, the load receiving portion 46 is concerned. And the support pin 12 can be prevented from coming into contact with each other, so that the noise generated when the braking force of the parking brake is released and the pole 40 is returned to the initial pole position can be reduced.

  As described above, the foot-operated parking brake operating device 1 according to the first embodiment includes the pedal support 10, the operating pedal 20, the ratchet member 30, the pole 40, and the pole spring 50 as a pole biasing member. And the pawl stopper 55, and the parking brake can be operated via the brake cable C by the stepping operation of the operation pedal 20.

  According to the foot-operated parking brake operating device 1, the sawtooth 31 of the ratchet member 30 that is integrally disposed with the operation pedal 20 and the claw portion 41 of the pole 40 that is biased by the pole spring 50 are provided. By meshing, the operation pedal 20 can be prevented from rotating in the second rotation direction RB, and the parking brake can be maintained in the operating state.

  In the foot-operated parking brake operating device 1, the pole 40 has a contact portion 42 and a long hole portion 45, and the long hole portion 45 is inserted by the support pin 12, so that the pedal The support 10 is turnable and supported so as to be slidable.

  Further, the pawl stopper 55 is moved from the braking force maintaining state (see FIG. 3) in which the saw tooth 31 of the ratchet member 30 and the pawl 40 are engaged with each other in accordance with the rotation of the operation pedal 20 in the first rotation direction RA. The pawl 40 that rotates around the support pin 12 when releasing the engagement of the ratchet member 30 with the saw blade 31 and returning to the initial state (see FIG. 5) in which the braking of the parking brake is released. The abutment portion 42 is abutted to stop the rotation of the pole 40.

  As shown in FIG. 7, according to the foot-operated parking brake operating device 1, the contact surface S of the contact portion 42 is in relation to the second imaginary line IB extending along the longitudinal direction of the long hole portion 45. Is formed so as to extend along the first imaginary line IA that intersects at a right-angled intersection angle α, it acts on the pole 40 by contact with the pole stopper 55 when returning from the braking force maintaining state to the initial state. The force FA can be applied in a direction parallel to the longitudinal direction of the long hole portion 45 without a component in the short direction of the long hole portion 45. As a result, according to the foot-operated parking brake operating device 1, the support pin 12 does not relatively move in the short-side direction in the long hole portion 45, so that the metal Even when the load receiving portion 46 is provided, the contact between the load receiving portion 46 and the support pin 12 is suppressed, and the sound generated when the rotation of the pole 40 is stopped by the contact with the pole stopper 55 is generated. Can be reduced.

  As shown in FIG. 6, according to the foot-operated parking brake operating device 1, the load applied to the inner peripheral surface of the long hole portion 45 by the tension of the brake cable C when the braking force is maintained. Can be received by the load receiving portion 46 made of metal, so that the deformation of the inner peripheral surface of the elongated hole portion 45 is suppressed, and the operation of applying and releasing the braking force by the foot-operated parking brake operating device 1 is appropriately performed. It can be carried out. Further, according to the foot-operated parking brake operating device 1, the metal load receiving portion 46 is disposed on the inner peripheral surface of the elongated hole portion 45 to suppress deformation of the inner peripheral surface of the elongated hole portion 45. That is, it is possible to reduce both the noise generated when the rotation of the pole 40 when returning to the initial position of the pole is stopped by contact with the pole stopper 55.

(Second Embodiment)
Next, the configuration of the foot-operated parking brake operation device 1 according to an embodiment (second embodiment) different from the first embodiment described above will be described in detail with reference to the drawings. The foot-operated parking brake operating device 1 according to the second embodiment has the same configuration as the foot-operated parking brake operating device 1 according to the first embodiment described above, except for the configuration of the pole 40. . Therefore, in the following description, the description of the same configuration as that of the first embodiment is omitted, and a different configuration will be described in detail.

(Configuration of pole in the second embodiment)
As in the first embodiment, the pole 40 according to the second embodiment is rotatably supported around the support pin 12 of the pedal support 10, and includes a claw portion 41, a contact portion 42, and a long hole portion. 45. The pole 40 is biased so as to rotate around the support pin 12 in a predetermined direction by the pole biasing force FP of the pole spring 50, and the pawl portion 41 is configured to mesh with the saw tooth 31 of the ratchet member 30. Yes.

  In the pole 40 according to the second embodiment, the long hole portion 45 is formed so as to penetrate the pole 40 in the plate thickness direction, and is inserted through the support pin 12 of the pedal support 10. The long hole portion 45 has a long dimension in a predetermined direction and is formed in a long hole shape having a short dimension in a direction perpendicular to the long dimension. Therefore, by inserting the support pin 12 into the elongated hole portion 45, the pole 40 can be rotated with respect to the pedal support 10 and supported so as to be slidable in the longitudinal direction of the elongated hole portion 45. Has been.

  Also in the second embodiment, a metal load receiving portion 46 and a resin buffer portion 47 are disposed on the inner peripheral surface of the elongated hole portion 45 (see FIG. 6). Also in the second embodiment, the load receiving portion 46 is one surface (vehicle rear side) extending along the longitudinal direction of the inner peripheral surface of the elongated hole portion 45, and is the support pin 12 by the action of the pole side load LP. Is arranged at a portion in contact with the metal, and is made of a metal having a hardness capable of withstanding the pole-side load LP. Thereby, since the smoothness of the operation | movement of the pole 40 in the foot-operated parking brake operating device 1 can be ensured, it is possible to reliably apply the braking force and release the braking force by the parking brake.

  The buffer portion 47 according to the second embodiment is disposed in a portion of the inner peripheral surface of the elongated hole portion 45 excluding the load receiving portion 46 as in the first embodiment, and is configured by a hard synthetic resin. Has been. The buffer portion 47 is disposed with a certain thickness on the inner peripheral surface of the elongated hole portion 45, and plays a role of reducing the contact sound of the support pin 12 with respect to the inner peripheral surface of the elongated hole portion 45.

(Specific Configuration of Contact Part According to Second Embodiment)
A specific configuration of the contact portion 42 of the pole 40 in the second embodiment will be described in detail with reference to FIG. As described above, when releasing the braking force of the parking brake, if the operation pedal 20 is rotated in the first rotation direction RA and the reset operation piece 24 is brought into contact with the pole 40, the pole 40 is supported. It rotates around the pin 12. By the rotation of the pole 40 at this time, the contact portion 42 of the pole 40 contacts the pole stopper 55 and positions the pole 40 at the initial pole position.

  As shown in FIG. 8, the abutment surface S of the abutment portion 42 includes a first imaginary line IA extending along the abutment surface S and a second imaginary direction indicating the longitudinal direction of the elongated hole portion 45 of the pole 40. The line IB is formed to have an intersecting angle α that forms an acute angle (for example, 80 ° to 89 °, preferably close to a right angle) in a side view.

  Also in the second embodiment, when the pole 40 rotates around the support pin 12 and the contact portion 42 contacts the pole stopper 55, the contact surface S of the contact portion 42 does not contact the contact surface S. A force FA perpendicular to the surface S is input from the pole stopper 55. Accordingly, the pole 40 can move relative to the pedal support 10 by the action of the force FA input from the pole stopper 55.

  The contact surface S of the contact portion 42 in the second embodiment is along the first imaginary line IA that forms an acute intersection angle α with respect to the second imaginary line IB extending along the longitudinal direction of the elongated hole portion 45. Therefore, the force FA input from the pole stopper 55 is applied to the component FB parallel to the second imaginary line IB extending along the longitudinal direction of the slot 45 and the second imaginary line IB. And vertical component force FC. As shown in FIG. 8, the component force FB that constitutes most of the force FA acting on the contact surface S acts in the longitudinal direction of the long hole portion 45 and a part of the force FA acting on the contact surface S. Is applied toward the claw portion 41 side in the short-side direction of the long hole portion 45. In other words, when the pole 40 moves relative to the pedal support 10 by contact with the pole stopper 55, the pole 40 is in the short side direction of the long hole portion 45 and the claw portion 41 side direction. Move small.

  Also in the second embodiment, the load receiving portion 46 on the inner peripheral surface of the elongated hole portion 45 is disposed on one surface side along the longitudinal direction on the vehicle rear side. By the action of the FC, it moves along the short direction of the long hole portion 45 and away from the load receiving portion 46. Then, when the abutment portion 42 abuts on the pole stopper 55, the support pin 12 first comes into contact with the buffer portion 47 of the portion facing the load receiving portion 46 by the action of the component force FC, and then receives the load receiving portion. It moves to the part 46 side. Thereby, according to the foot-operated parking brake operating device 1 according to the second embodiment, even when the metal load receiving portion 46 is disposed on the inner peripheral surface of the elongated hole portion 45, the buffer portion is firstly provided. After making it contact with 47, the said load receiving part 46 and the support pin 12 can be made to contact, and the impact at the time of the support pin 12 and the metal load receiving part 46 contacting can be reduced. Thereby, according to the foot-operated parking brake operating device 1 according to the second embodiment, the braking force of the parking brake is reduced by reducing the impact when the support pin 12 and the metal load receiving portion 46 come into contact with each other. It is possible to reduce the sound generated when the pole 40 is released and returned to the initial pole position.

  As described above, the foot-operated parking brake operation device 1 according to the second embodiment is similar to the first embodiment in that the pedal support 10, the operation pedal 20, the ratchet member 30, the pole 40, and the pole A pole spring 50 as an urging member and a pole stopper 55 are provided, and the parking brake can be operated via the brake cable C by a stepping operation of the operation pedal 20.

  According to the foot-operated parking brake operating device 1, the sawtooth 31 of the ratchet member 30 that is integrally disposed with the operation pedal 20 and the claw portion 41 of the pole 40 that is biased by the pole spring 50 are provided. By meshing, the operation pedal 20 can be prevented from rotating in the second rotation direction RB, and the parking brake can be maintained in the operating state.

  In the foot-operated parking brake operating device 1, the pole 40 has a contact portion 42 and a long hole portion 45 having a load receiving portion 46 and a buffer portion 47, and the long hole portion 45 is a support pin. By being inserted through 12, the pedal support 10 is rotatable and supported so as to be slidable.

  Furthermore, also in the second embodiment, the pole stopper 55 is disposed in the first rotational direction RA of the operation pedal 20 from the braking force maintaining state (see FIG. 3) in which the sawtooth 31 of the ratchet member 30 and the pole 40 are engaged. When the ratchet member 30 is released from meshing with the saw-tooth 31 and returned to the initial state (see FIG. 5) in which the parking brake is released, Abutting on the abutting portion 42 of the pole 40 that pivots to stop the pivoting of the pole 40.

  According to the foot-operated parking brake operating device 1 according to the second embodiment, as shown in FIG. 8, the contact surface S of the contact portion 42 extends along the longitudinal direction of the long hole portion 45. Since it is formed so as to extend along the first imaginary line IA intersecting with the imaginary line IB at an acute intersection angle α, when returning from the braking force maintaining state to the initial state, by contact with the pole stopper 55 The component of the force FA acting on the pole 40 in the short direction of the long hole portion 45 (ie, component force FC) is small, and the component in the long direction of the long hole portion 45 (ie, component force FB) is large. It can be made to act as follows. Thereby, according to the foot-operated parking brake operating device 1, the support pin 12 relatively moves in the short direction in the long hole portion 45, but at least after contacting the buffer portion 47, the metal load receiving portion 46, even when the inner circumferential surface of the elongated hole portion 45 has a metal load receiving portion 46, the rotation of the pole 40 when returning to the initial pole position is prevented. It is possible to reduce the sound that is generated when the vehicle stops due to contact.

  Also in the second embodiment, according to the foot-operated parking brake operating device 1, when the braking force is maintained, the support pin 12 is brought into contact with the inner peripheral surface of the elongated hole portion 45 by the tension of the brake cable C. Since the applied load can be received by the metal load receiving portion 46 (see FIG. 6), deformation of the inner peripheral surface of the elongated hole portion 45 is suppressed, and braking force is applied by the foot-operated parking brake operating device 1. The operation and the release operation can be appropriately performed. Further, according to the foot-operated parking brake operating device 1, the metal load receiving portion 46 is disposed on the inner peripheral surface of the elongated hole portion 45 to suppress deformation of the inner peripheral surface of the elongated hole portion 45. That is, it is possible to reduce both the noise generated when the rotation of the pole 40 when returning to the initial position of the pole is stopped by contact with the pole stopper 55.

  Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. For example, in the above-described embodiment, the torsion coil spring is used as the pole spring 50. However, the present invention is not limited to this aspect, and a tension coil spring or a compression coil spring can also be used.

  Although the ratchet member 30 is fixed to the ratchet mounting portion 23 of the operation pedal 20 using the rivets 32 at two locations, the ratchet member 30 is not limited to this mode. As a method for fixing the ratchet member 30 to the ratchet mounting portion 23, screws, resistance welding, or the like may be used. Further, the number of places where the ratchet member 30 is fixed to the ratchet mounting portion 23 is not limited to two, and may be fixed at more places. Moreover, it is good also as a structure which fixes all or one part of the longitudinal direction (arc direction) of the ratchet member 30 continuously by arc welding, an adhesive agent, etc.

DESCRIPTION OF SYMBOLS 1 Foot-operated parking brake operation apparatus 10 Pedal support 11 Support shaft 12 Support pin 20 Operation pedal 30 Ratchet member 31 Sawtooth 40 Pole 41 Claw part 42 Abutting part 45 Elongate part 46 Load receiving part 47 Buffer part 50 Pole spring 55 Pole Stopper C Brake cable S Contact surface IA First imaginary line IB Second imaginary line α Intersection angle

Claims (3)

Pedal support arranged on the car body,
An operation pedal that is rotatably supported around a support shaft of the pedal support and that activates a parking brake via a brake cable by a stepping operation in a predetermined direction around the support shaft;
A ratchet member that is integrally disposed with respect to the operation pedal and has a plurality of saw teeth formed along an arc shape centered on the support shaft;
The operation pedal is disposed in the pedal support so as to be rotatable by a support pin extending in parallel with the support shaft, and meshed with the sawtooth of the ratchet member, whereby the operation pedal is moved in a direction opposite to the predetermined direction. A pole that prevents rotation and maintains the parking brake in an activated state;
A pawl biasing member that biases the pawl in a predetermined rotational direction that meshes with the sawtooth of the ratchet member,
From the braking force maintaining state in which the sawtooth of the ratchet member and the pawl are engaged with each other, the engagement of the ratchet member with the sawtooth is released as the operation pedal rotates in a predetermined direction, and the parking brake is braked. When returning to the released initial state, the stopper member abuts on the pawl rotating around the support pin and stops the pawl rotation,
The pole
In a state change including the initial state and the braking force maintaining state, a length inserted through the support pin so as to be rotatable with respect to the pedal support and to be slidable is supported. The hole,
A contact portion that contacts the stopper member when returning the pole from the braking force maintaining state to the initial state;
The elongated hole portion is
Of the inner peripheral surface of the elongated hole, having a metal load receiving portion disposed on one side of the surface extending along the longitudinal direction,
The foot-operated parking brake operating device, wherein the contact surface of the contact portion is formed to extend in a direction orthogonal to the longitudinal direction of the elongated hole portion. Pedal support arranged on the car body,
An operation pedal that is rotatably supported around a support shaft of the pedal support and that activates a parking brake via a brake cable by a stepping operation in a predetermined direction around the support shaft;
A ratchet member that is integrally disposed with respect to the operation pedal and has a plurality of saw teeth formed along an arc shape centered on the support shaft;
The operation pedal is disposed in the pedal support so as to be rotatable by a support pin extending in parallel with the support shaft, and meshed with the sawtooth of the ratchet member, whereby the operation pedal is moved in a direction opposite to the predetermined direction. A pole that prevents rotation and maintains the parking brake in an activated state;
A pawl biasing member that biases the pawl in a predetermined rotational direction that meshes with the sawtooth of the ratchet member,
From the braking force maintaining state in which the sawtooth of the ratchet member and the pawl are engaged, with the rotation of the operation pedal in a predetermined direction, the engagement of the ratchet member with the sawtooth is released, and the parking brake is braked. When returning to the released initial state, the stopper member abuts on the pawl rotating around the support pin and stops the pawl rotation,
The pole
In a state change including the initial state and the braking force maintaining state, a length inserted through the support pin so as to be rotatable with respect to the pedal support and to be slidable is supported. The hole,
A contact portion that contacts the stopper member when returning the pole from the braking force maintaining state to the initial state;
The elongated hole portion is
Of the inner peripheral surface of the elongated hole portion, a metal load receiving portion disposed on one side of the surface extending along the longitudinal direction;
A resin-made buffer portion disposed so as to include a portion facing the load receiving portion of the inner peripheral surface of the elongated hole portion;
The foot-operated parking brake operating device according to claim 1, wherein the contact surface of the contact portion is formed to extend in a direction intersecting at an acute angle with respect to the longitudinal direction of the elongated hole portion. The load receiver is
When the pawl is in the braking force maintaining state, it is one side of the inner peripheral surface of the elongated hole portion extending along the longitudinal direction by the action of the tension of the brake cable, and the elongated hole The foot-operated parking brake operating device according to claim 1 or 2, wherein the support pin is disposed at a portion where the support pin comes into contact with an inner peripheral surface of the portion.

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