JPH0423085Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a parking brake device having a locking mechanism for keeping a brake pedal in a depressed state.

BACKGROUND OF THE INVENTION For example, a foot brake device for an electric vehicle used in a golf car or the like usually incorporates a lock mechanism for keeping the brake pedal in a depressed state. That is, by depressing the brake pedal to activate the brake, the foot brake device can be used as a parking brake by maintaining the depressing state of the brake pedal by the lock mechanism.

An example of the above parking brake device is the parking brake device disclosed in Japanese Utility Model Application Publication No. 54-36233.

Problems to be Solved by the Invention The parking brake device as described above is normally configured such that when the accelerator pedal is depressed by a predetermined amount, the brake pedal returns from the depressed state to its original position and the brake is released.

Generally, in parking brake devices such as those mentioned above, it is convenient to set the amount of depression of the accelerator pedal required to release the brake as small as possible for reasons such as operability. There was a risk that the car would start suddenly when the brakes were released.

Furthermore, in a parking brake device that temporarily releases the parking brake by depressing the accelerator pedal, it is required that the amount of depression of the accelerator pedal be made as small as possible.

Means for Solving the Problems The present invention includes a brake pedal arm rotatably supported on a vehicle body frame and having a brake pedal at one end; A parking pedal arm having a pedal, and a locking device that is fixed to the parking pedal arm, has a tooth pattern formed on its peripheral edge to engage with a locking pawl that is fixed to the vehicle body frame, and has a locking pin fixed to a part of the arm. a plate, a cam surface which is pivotally connected to the brake pedal arm and whose peripheral edge abuts the locking pin and presses the tooth pattern of the locking plate in the direction of separating from the locking pawl; A cam plate having a locking part that presses the teeth of the plate in the direction of engagement with the locking claw, a spring for pressing the cam plate against the locking pin, and a spring that moves in conjunction with the movement of the accelerator pedal to In a parking brake device comprising a kicking member for pushing the tooth pattern of the stop plate in the direction of separating from the locking pawl, when the locking pawl and the tooth pattern engage, the part above the rotation axis of the cam plate This parking brake device is characterized in that a locking pin is fixed to a locking plate so as to be located at.

Function: The parking brake device according to the present invention is configured such that when the parking brake is released, the locking portion of the cam plate quickly moves away from the locking pin fixed to the locking plate, so that the parking brake is released. The amount of depression of the accelerator pedal required for release can be set to be extremely small.

Embodiment FIG. 1 is a drawing illustrating a parking brake device according to the present invention, and this drawing shows the parking brake device in an operating state.

In FIG. 1, 1 is a frame of the body of an electric vehicle, and 2 and 3 are first and second brackets fixed to the frame 1, respectively. 4 is a brake pedal arm rotatably supported by the first bracket 2 via a pivot pin 5, and 6 is a brake pedal fixed to the upper end of the brake pedal arm 4. A return spring (not shown) is disposed between the brake pedal arm 4 and the first bracket 2, and the brake pedal arm 4 is always biased clockwise by the elastic force of this return spring. A brake cable 7 has one end connected to the brake pedal arm 4, and the other end of the brake cable 7 is connected to a brake device (not shown). A parking pedal arm 8 is rotatably supported at the tip of the brake pedal arm 4 via a pin 9, and a parking pedal 10 is fixed to the tip. Reference numeral 11 denotes a locking plate fixed to the parking pedal arm 8, and the lower peripheral edge of the locking plate 11 is provided with a tooth pattern 11a that engages with a locking pawl 12 fixed to the second bracket 3. Furthermore, a locking pin 13 that comes into contact with a cam plate 14, which will be described later, is fixed to a substantially central portion of the locking plate 11. A cam plate 14 is rotatably supported near the upper end of the central portion of the brake pedal arm 4 via a pin 15. The lower peripheral edge of the tip of the cam plate 14 is provided with a rim for abutting the locking pin 13 and pressing the locking plate 11 in the direction in which the tooth pattern 11a of the locking plate 11 separates from the locking pawl 12. A cam surface 14a and a locking portion 14b that is continuous with the cam surface 14a and presses the locking plate 11 in a direction in which the tooth pattern 11a of the locking plate 11 engages with the locking pawl 12 are formed. There is.

The positional relationship between the locking pin 13 and the pin 15, which is the rotation axis of the cam plate 14, is as shown in FIG.
That is, the locking pin 13 is set to be located above the pin 15 when the parking brake is in operation.

Reference numeral 16 denotes a spring stretched between the rear end of the cam plate 14 and the brake pedal arm 4, and the elastic force of the spring 16 causes the cam plate 14 to
It is always in pressure contact with the locking pin 13. and the first
As shown in the figure, when the locking portion 14b of the cam plate 14 is in pressure contact with the locking pin 13, the locking plate 11 is pressed in the direction of the arrow in the figure. 17 is a shaft-like member rotatably supported by the second bracket 3;
18 is an accelerator pedal arm whose lower end is fixed to the shaft member 17; 19 is an accelerator pedal arm 18;
This is an accelerator pedal supported on the side of the brake pedal 6 by the brake pedal 6.

Reference numeral 20 denotes a kick-out member whose lower end is fixed to the shaft-like member 17;
It rotates in synchronization with the accelerator pedal arm 18 via. Reference numeral 21 denotes a kick-out bolt screwed onto the kick-out member 20, and the head of this kick-out bolt 21 faces the tooth pattern 11a of the locking plate 11 that is engaged with the locking pawl 12. It's like this.

Below, the operation procedure of the parking brake device having the above configuration will be explained.

As described above, FIG. 1 shows the parking brake device in an activated state. That is, in this state,
Engagement between the tooth pattern 11a of the locking plate 11 fixed to the parking pedal arm 8 and the locking pawl 12, and the locking plate 11
The locking pin 13 fixed to the locking portion 1 of the cam plate 14
4b, the tooth pattern 11a of the locking plate 11 presses against the locking pawl 12, so that the brake pedal arm 4 is maintained in the depressed state, and the brake pedal arm 4 is connected to the brake cable 7 via the brake cable 7. The connected brake device remains activated and the electric vehicle is in a parked state.

To start the electric vehicle from this state, when the accelerator pedal 19 is depressed, the accelerator pedal 1
9 and the accelerator pedal arm 18 are connected to the shaft member 17
Rotate counterclockwise around the center. Therefore, the kickout member 20 whose lower end is fixed to the shaft member 17 also rotates counterclockwise around the shaft member 17, and the head of the kickout bolt 21 screwed onto the kickout member 20 rotates counterclockwise around the shaft member 17. comes into contact with the tooth pattern 11a of the locking plate 11, and the locking plate 11
, in the direction of the arrow, centering on pin 9. By pressing the kick bolt 21, as shown in FIG.
The locking state of the locking pin 13 is released and the locking pin 13 is released.
moves toward the cam surface 14a while contacting the locking portion 14b of the cam plate 14. At this time, since the pin 15 that pivotally connects the cam plate 14 to the brake pedal arm 4, that is, the rotation axis of the cam plate 14 is below the locking pin 13 in the state shown in FIG. 1 or 2, the above-mentioned When the locking pin 13 moves to the boundary position between the locking portion 14b and the cam surface 14a, the cam plate 14 is moved by the spring 16 in the direction in which the locking portion 14b is separated from the locus of movement of the locking pin 13. rotates against the elastic force of. When the accelerator pedal 19 is further depressed and the locking plate 11 is further pressed in the direction of the arrow with the pin 9 as the center, the spring 1 is released as shown in FIG.
6, the locking pin 13 fixed to the locking plate 11 climbs over the locking portion 14b of the cam plate 14 and comes into contact with the cam surface 14a. Therefore, the brake pedal arm 4 is rotated clockwise around the pivot pin 5 by the elastic force of a return spring (not shown), and the parking pedal arm 8 is rotated clockwise by the elastic force of the spring 16. Since the surface 14a presses the locking pin 13, the locking plate 1
1, the brake pedal arm 4 and the parking pedal arm 8 are rotated about the pin 9 in the direction of the arrow, and the brake pedal arm 4 and the parking pedal arm 8 are in the state shown in FIG.

The state shown in FIG. 4 shows the state in which the electric vehicle is running when the brake is released and the accelerator pedal 9 is depressed by a desired amount.

In order to stop the electric vehicle from the running state shown in FIG. 4 above, when the accelerator pedal 9 is returned to its original state from the depressed state, the state shown in FIG. 5 is reached, and the brake pedal 6, brake pedal arm 4
As shown in FIG. 6, the brake device rotates counterclockwise around the pivot pin 5 against the elastic force of a return spring (not shown), and is connected to the brake pedal arm 4 via the brake cable 7. It works and the electric car stops. After stopping the electric vehicle in this way, when the parking pedal 10 is depressed against the elastic force of the spring 16 in order to park the electric vehicle, the locking plate 11 fixed to the parking pedal arm 8 is also pinned. It rotates around 9 in the direction of the arrow in the figure. As shown in FIG. 1, the tooth pattern 11a of the locking plate 11 engages with the locking pawl 12 to hold the brake pedal arm 4 in a locked state, and at the same time, the locking pin 13 fixed to the locking plate 11 engages with the locking portion 14b of the cam plate 14, and the cam plate 14
Spring 1 is transmitted to locking pin 13 via
Due to the elastic force 6, the tooth pattern 11a of the locking plate 11 is pressed against the locking pawl 12. Therefore, the brake pedal arm 4 is locked in the depressed state,
The brake system remains activated.

Effects of the Invention As explained above, in the parking brake device according to the present invention, when the parking brake is activated, the locking pin is positioned above the rotation axis of the cam plate, so when the parking brake is released, Since the locking part of the cam plate quickly moves away from the locking pin fixed to the locking plate, the amount of depression of the accelerator pedal required to release the parking brake is extremely small, making it extremely easy to operate. expensive.

Therefore, according to the present invention, an extremely practical parking brake device can be provided.

[Brief explanation of drawings]

FIG. 1 is a side view showing the operating state of the parking brake of the parking brake device according to the present invention, FIGS. 2 and 3 are side views for explaining the procedure for releasing the parking brake device, and FIG. FIGS. 5 and 6 are side views showing the parking brake device in a running state, and are side views for explaining the parking brake operation procedure of the parking brake device. 1... Frame, 4... Brake pedal arm, 6... Brake pedal, 8... Parking pedal arm, 10... Parking pedal, 11... Locking plate, 1
1a... Tooth shape, 12... Locking claw, 13... Locking pin, 14... Cam plate, 14a... Cam surface, 14b
... Locking part, 15 ... Pin [cam plate rotation axis],
16...Spring, 18...Accelerator pedal arm, 19...Accelerator pedal, 20...Kicking member.

Claims (1)

[Scope of utility model registration request] a brake pedal arm rotatably supported by the vehicle body frame and having a brake pedal at one end;
a parking pedal arm rotatably supported on the upper part of the brake pedal arm and having a parking pedal at one end; teeth fixed to the parking pedal arm and engaging with a locking pawl fixed to the vehicle body frame at the peripheral edge; A locking plate having a locking pin fixed to a part of the locking plate is pivotally connected to the brake pedal arm, and the peripheral edge of the locking plate is in contact with the locking pin to remove the tooth shape of the locking plate from the locking pawl. A cam plate having a cam surface that presses in the direction of detachment, a cam plate that is connected to the cam surface and has a locking part that presses the teeth of the locking plate in the direction of engagement with the locking pawl, and the cam plate is connected to the locking pin. In the parking brake device, the parking brake device includes a spring for pressure contact, and a kicking member for pressing the teeth of the locking plate in the direction of separating from the locking pawl in conjunction with the movement of the accelerator pedal. A parking brake device characterized in that a locking pin is fixed to a locking plate so that the locking pin is positioned above the rotation axis of the cam plate when the cam plate engages with the tooth pattern.