JP2002255016A - Retractable parking brake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a retractable parking brake device easily operable by allowing the press-down of an operation lever for storage to be related to a lock indication. SOLUTION: This retractable parking brake device comprises the operation lever 1 pivotally supported on a base member 19 so as to be pulled up and pushed down, an actuation lever 7 brought into a braking state interlockingly with the pull-up of the operation lever 1, a pole 20 for holding the attitude of the actuation lever 7 in the braking state, a connection rod 6 incorporated in the operation lever 1 and movable in the axial direction of the operation lever, a storage lever 2 that is shaft-installed on the operation lever 1, and rotates, and travel-controls the connection rod 6 in the axial direction of the control lever, an control connection groove 4 for the operation lever 1 guiding the connection pin 5 of the connection rod 6, and a operation connection groove 3 for the operation lever 7 engaged with the connection pin 5 of the connection rod 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parking brake device capable of storing an operation lever at the time of braking and enabling visually distinguishing the braking state.

[0002]

2. Description of the Related Art In a parking brake device (hereinafter abbreviated as PB) for a passenger car or the like, an operating lever is arranged between a driver's seat and a passenger seat, and the operating lever is pulled up to create a braking state. In this braking state, the operation lever protrudes above the seat, so that the operation lever raised when a person moves between the driver's seat and the passenger's seat or transfers a load becomes an obstacle. Therefore, there has been proposed a PB in which the operation lever can be pushed down and stored as required while maintaining the braking state. As the prior art of these PBs, Utility Model Registration No. 2518175 “Parking brake operating device”
Utility model registration No. 2525009 "Operating device for parking brake" can be mentioned.

In a conventional PB in which only the operating lever can be pushed down in the braking state, (1) a switching lever is pivotally mounted on the operating lever so as to be rotatable between a locked position and an unlocked position. PB (Utility Model Registration No. 2518175) provided with a guide means for returning the switching lever to the locked position on the intermediate lever, and (2) the part where the locking lever is pivotally attached to the intermediate lever and separated from the intermediate lever The PB has a release lever pivotally mounted on the PB, a part of the release lever provided with a block portion for preventing a pushing operation of a brake release push button, and a control means provided with a holding means for holding the release lever at the release position. (Utility Model Registration No. 2525009).

[0004]

The utility model registration No. 25
Both No. 18175 and Utility Model Registration No. 2525009 have complicated structures, and there are concerns about an increase in the number of parts, difficulty in assembling, and maintenance. In addition, Utility Model Registration No. 25
No. 25009 has an increased number of levers to operate and poor operability. Preferably, an operation is performed in which a single lever is used to display the state, and when the brake is released, the state display is automatically canceled. Therefore, while asking the driver to perform another operation in order to `` pull down the operating lever while maintaining the braking state '' and prompting the driver to draw certain attention, the above-mentioned separate operation is `` pressing down the operating lever while maintaining the braking state '' operation In the meantime, we examined the configuration of a simple operation PB that has a relationship between the depression of the operation lever and the lock display.

[0005]

SUMMARY OF THE INVENTION As a result of the study, the operation lever and the operation lever are connected or released by a connection rod, and only the operation lever can be pushed down with the operation lever and the operation lever released. In the parking brake device of the type, the connection releasing means of the connecting rod includes a storage lever attached to the operation lever and moved between the operation position and the return position, and a connecting member connecting the storage lever and the connection rod. Is moved toward the operating position, the connecting rod is moved in the axial direction of the operating lever, and the operating lever and the operating lever are released.
It is a PB (parking brake device). As a specific connection releasing means, a configuration in which a storage lever that rotates between an operation position and a return position is pivotally mounted on an operation lever, and an engagement groove in which an operation cam interlocked with the storage lever abuts is provided in the connection rod. By rotating the storage lever toward the operating position, the operating cam pushes the engaging groove in the axial direction of the operating lever to move the connecting rod, and releases the operating lever and the operating lever.

In the above configuration, first, the connection between the operating lever and the operating lever is made by a connecting rod included in the operating lever, and a simple configuration for realizing the release of the connecting rod is presented. As the connection member, a configuration in which an engagement groove provided in the connection rod is pushed in the axial direction of the operation lever by an operation cam interlocking with the storage lever can be exemplified. A gear may be formed on the peripheral edge or the peripheral surface of the operation cam to form an operation pinion, and a rack and pinion structure in which a rack is formed on the inner periphery of the corresponding engagement groove. The storage lever itself reverses the front and back as a change in posture, and if different colors or characters are displayed on the front and back, a large state change can be brought about, and the driver can be alerted that the vehicle is in a braking state.

In order to simplify the operation, the retractable type
In the storage lever and the connecting rod of the PB, the connecting rod is provided with a return means in the axial direction of the operation lever, and the connecting rod moved in accordance with the return means moves the storage lever toward the return position via the connecting member. . In a specific configuration, the connecting rod is provided with a return means in the operating lever axial direction, and the engagement groove of the connecting rod retracted in accordance with the return means pushes a pressing portion interlocked with the storage lever to turn the storage lever toward the return position. To rotate. The return means may be a mechanical push button, but is preferably a return means which is biased by a spring or the like. Normal,
The retracted connecting rod can engage the rod rear end (specifically, a connecting portion described later) with the operating connecting groove of the operating lever, but the rod rear end abuts on the outer periphery of the operating lever other than the operating connecting groove. Can't retreat. As described above, if the return means by the urging in the axial direction of the operating lever is used, the connecting rod is automatically retracted when the operating lever is lifted and the rear end of the rod reaches the operating connecting groove. Can push the pressing portion to rotate the storage lever and return to the return position.

[0008] A specific connection (connection by a connecting member) of the operating lever and the operating lever via the connecting rod is realized by fitting a connecting portion (usually a connecting pin) of the connecting rod to both. In this case, (1) the operating connection groove of the operating lever into which the connecting pin is fitted to the operating lever is formed to have a shape expanded in the direction of displacement of the connecting pin, or (2) the connecting pin is connected to the operating lever. It is desirable that the operation connection groove of the operation lever into which the is fitted has a shape in which the connection pin is expanded in the displacement direction. When the connecting rod is pushed in the axial direction of the operating lever by pressing the operating cam, the connecting pin is separated from the operating connecting groove or the operating connecting groove at an early stage due to the expanded shape of the operating connecting groove or the operating connecting groove. Therefore, resistance due to friction can be eliminated. Also, when the connecting pin is displaced in the axial direction of the operating lever, it is easier for the operating connecting groove or the operating connecting groove to be refitted if the operating connecting groove has an expanded shape.

The retractable PB (parking brake device) according to the present invention includes an operating lever pivotally supported on a base member so as to be able to raise and push down, and an operating lever which is brought into a braking state in conjunction with the raising of the operating lever. Holding means for holding the operating lever in the posture of the braking state, a connecting rod built in the operating lever and movable in the axial direction of the operating lever, and a shaft mounted on the operating lever to rotate and connecting the operating rod to the operating lever. A storage lever that moves in the axial direction, an operation connection groove of an operation lever that guides a connection pin of the connection rod,
The connecting pin of the connecting rod comprises an operating connecting groove of an operating lever to be engaged, the connecting lever is moved by the storage lever to release the connecting pin from the operating connecting groove, and the connection of the operating lever and the operating lever is released. The operation lever can be pushed down while holding the operating lever in the braking state by the holding means.

More specifically, the connecting rod is provided with return means for urging the connecting pin in a direction in which the connecting pin engages with the operating connecting groove.
The connecting rod moved according to the return means rotates the storage lever, and at least one of the operation connection groove and the operation connection groove increases the groove width in a direction in which the connection pin is separated from the operation connection groove.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a side view of a retractable PB to which the present invention is applied, FIG. 2 is a plan view of the retractable PB, FIG.
Is a vertical sectional view centering on the operation lever 1 of the tiltable PB,
FIG. 4 is a partially enlarged vertical sectional view showing the storage lever 2, and FIG.
Is a partially enlarged horizontal sectional view showing the storage lever 2, FIG. 6 is a partially enlarged vertical sectional view corresponding to FIG.
FIG. 7 shows the operating connection groove 3 in a state where the storage lever 2 has begun to rotate.
8 is a partially enlarged sectional view showing the positional relationship of the connecting pin 5 with respect to the operation connecting groove 4, FIG. 8 is a sectional view taken along the line AA in FIG. 7, and FIG. 9 is a partially enlarged vertical sectional view corresponding to FIG. FIG. 10 is a partially enlarged vertical sectional view corresponding to FIG. 4 after the storage lever 2 has been turned, and FIG. 11 is a vertical sectional view corresponding to FIG. 3 showing a state in which the engagement of the connecting rod 6 and the operating lever 7 is released. FIG. 12 is a vertical sectional view corresponding to FIG.

As shown in FIGS. 1, 2 and 3, the retractable PB of this embodiment is pivotally supported on the base member 19 so as to raise and push down the operation lever 1 and is contained in the operation lever 1. The connecting pin 5 provided at the rear end of the connecting rod 6 is connected or released to the operating connecting groove 4 of the operating lever 1 and the operating connecting groove 3 of the operating lever 7 to which the brake wire 22 is connected, respectively. Is separated from the operating lever 7 and pushed down to realize a stored state. Connecting rod 6 is PB
The front end 11 of the rod is connected to a spring 10 provided on a push button 9 for operating a release rod 8 for releasing the brake. The spring 10 is a return unit that constantly urges the connecting pin 5 in a direction in which the connecting pin 5 engages with the operation connecting groove 3.

As shown in FIGS. 4 and 5, the storage lever 2 constituting the connection releasing means of the connecting rod 6 is pivotally mounted near the middle of the operation lever 1 to return to the return position (see FIG. 4) and to the operating position. (See FIG. 10). The operating cam 12, which is a connecting member for connecting the storage lever 2 and the connecting rod 6, pushes the front edge 14 of the engagement groove 13 of the connecting rod 6 during the rotation of the storage lever 2 toward the operating position. Has a cross-sectional shape integrally provided with a pressing protrusion 15 for pressing the operating lever in the axial direction and a pressing portion 17 for pressing the connecting edge 6 in the operating lever axial direction by pressing the pressing edge 16 of the engaging groove 13. And is coaxially attached to the storage lever 2.

In this embodiment, the rotation of the storage lever 2 is started to approximately 45.
The pressing protrusion 15 presses the front edge 14 of the engaging groove 13 until the angle reaches about 45 degrees, and the pressing part 17 pushes the pressing edge 16 of the engaging groove 13 in the direction of the operating lever of the connecting rod 6 from about 45 degrees to about 90 degrees. Press in this way,
The displacement range of the connecting rod 6 can be increased by dividing the rotation range of the storage lever 2 and pressing the engagement groove 13 at a plurality of portions having different rotation radii. When the storage lever 2 is in the operating position, the pressing projection 15 is hooked on the lower edge 18 of the engagement groove 13 and the pressing portion 17 is hooked on the pressing edge 16, respectively, and regulates the amount of rotation of the storage lever 2.

In the retractable PB, when the operating lever 1 is first pulled up, the operating lever 1 and the operating lever 7 to which the connecting rod 6 is connected are pulled up integrally (see FIG. 3), and a brake wire (not shown) is pulled. To bring it into braking. When the operating lever 7 reaches the braking state, the pole 20 (holding means) attached to the operating lever 7 is engaged with the ratchet 21 of the base member 19 to maintain the posture in the braking state. The operation lever 1 and the operation lever 7 include an operation connection groove 3 opened toward the operation lever 1 on the periphery of the operation lever 7, and an operation connection groove 4 provided on the operation lever 1 on substantially the same circumference as the operation connection groove 3. And a connecting pin provided at the rear end of the connecting rod 6 is integrally engaged with the grooves 3 and 4 to be connected (FIG. 7).
And FIG. 8). The connection pin 5 is guided by the operation connection groove 4 and is displaced along the operation lever axial direction, and is engaged with and released from the operation connection groove 3.

When the storage lever 2 is started to be depressed from the braking state, first, as shown in FIG. 6, the pressing projection 15 of the operation cam 12 pushes the front edge 14 of the engagement groove 13 to move the connecting rod 6 to the operation lever. Along the axial direction, it is advanced in a direction away from the working connection groove 3. At this time, as shown in FIGS. 7 and 8, for example, the operation connection groove 4 has a shape that is expanded in the operation lever axial direction of the connection rod 6 (the groove width is increased in the direction in which the connection pin separates from the operation connection groove). Connection pin 5
Is immediately separated from the inner edge of the operation connection groove 4 (FIG. 8), and the resistance of operation due to friction can be reduced. Although the working connection grooves 3 in this example are parallel, the working connection grooves 3 may also be formed in an expanded shape.

When the storage lever 2 is further tilted, as shown in FIG.
To further advance the connecting rod 6 in the operation lever axial direction. Then, at the stage where the pressing protrusion 15 is hooked on the lower edge 18 of the engagement groove 13, that is, at the stage where the storage lever 2 reaches the operating position, the pressing portion 17 is simultaneously engaged as shown in FIG. The latch 13 is hooked on the pressing edge 16 of the groove 13, and the rotation of the storage lever 2 is restricted.

As shown in FIG. 11, the connecting pin 5 at the rear end of the rod is separated from the operating connecting groove 3 of the operating lever 7 while being guided by the operating connecting groove 4 of the operating lever 1, and When the engagement is released, the connection between the operation lever 1 and the operation lever 7 via the connection pin 5 is also released. Thus, only the operating lever 1 can be pushed down separately from the operating lever 7, and as shown in FIG.
Can be pushed down to achieve the stored state. Here, in the non-braking state, the storage lever 2 faces upward (see FIG. 3 and the like), but in the storage state, the storage lever 2 faces downward. The storage lever 2 can distinguish between a braking state and a non-braking state based on the change in the posture.

In the PB of this embodiment, since the connecting rod 6 is urged in the axial direction of the operating lever by the spring 10 (return means) of the push button 9, when the operating lever 1 is lifted from the stored state of FIG. When the connecting pin 5 at the rear end reaches the operation connecting groove 3, the connecting rod 6 is automatically retracted.
Then, the connection pin 5 is guided by the operation connection groove 4 and fits into and engages with the operation connection groove 3, and the operation lever 1 and the operation lever 7 are connected again. At the same time, this time the pressing edge 16 of the engagement groove 13
Pushes the pressing portion 17 of the operation cam 12 to rotate the storage lever 2 toward the return position. As described above, it is necessary to operate the storage lever 2 when the operation lever 1 is stored, but when the operation lever 1 in the storage state is lifted, the storage lever 2 is
There is no need to operate anything. This eliminates the need for a means for returning the storage lever 2 to the return position.

[0020]

According to the present invention, in a retractable parking brake device in which only the operating lever can be pushed down by releasing the connecting rod and retracted, a simple operation of the retracting lever for calling attention to the retracted state is realized. The connecting rod releasing means by the storage lever shown in the present invention is not only simple in operation but also relatively simple in structure. Further, by forming the operation connection groove or the operation connection groove, which is the fitting target of the connection portion for connecting the operation lever and the operation lever via the connection rod, into an expanded shape, resistance to operation and malfunction can be reduced. . Further, the connecting rod is provided with a return means such as a bias, and the storage lever is automatically returned by moving the connecting rod in the axial direction of the operating lever. There is an advantage that movement is reliable.

[Brief description of the drawings]

FIG. 1 is a side view of a retractable PB to which the present invention is applied.

FIG. 2 is a plan view of the tiltable PB.

FIG. 3 is a vertical sectional view centering on an operation lever of a retractable PB to which the present invention is applied.

FIG. 4 is a partially enlarged vertical sectional view showing a storage lever.

FIG. 5 is a partially enlarged horizontal sectional view showing a storage lever.

6 is a partially enlarged vertical sectional view corresponding to FIG. 4 when the storage lever is started to rotate.

FIG. 7 is a partially enlarged cross-sectional view illustrating a positional relationship of the connection pin with respect to the operation connection groove and the operation connection groove when the storage lever has begun to rotate.

FIG. 8 is a sectional view taken along line AA in FIG. 7;

FIG. 9 is a partially enlarged vertical sectional view corresponding to FIG. 4 when the storage lever is further rotated.

10 is a partially enlarged vertical sectional view corresponding to FIG. 4 after the storage lever has been turned.

11 is a vertical sectional view corresponding to FIG. 3 and showing a state in which the engagement between the connecting rod and the operation lever is released.

FIG. 12 is a vertical sectional view corresponding to FIG. 3 in which the operation lever is pushed down and stored.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Operation lever 2 Storage lever 3 Operation connection groove 4 Operation connection groove 5 Connection pin 6 Connection rod 7 Operation lever 12 Operation cam 13 Engagement groove

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Junji Ishii 1410 Mohei, Kasaoka, Okayama Prefecture Inside Hirta Kogyo Co., Ltd. (72) Inventor Yoshitaka Noda 1410 Mohei, Kasaoka City, Okayama Prefecture Hirta Kogyo Co., Ltd. Hironori Ichinari 1410 Mohei, Kasaoka City, Okayama Prefecture Hirta Industry Co., Ltd. (72) Inventor Masayuki Tobe 5-33-8 Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation

Claims (6)

[Claims] 1. A collapsible parking brake device in which an operating lever and an operating lever are connected or released by a connecting rod, and only the operating lever can be pushed down when the operating lever and the operating lever are released. Comprises a storage lever attached to the operation lever and moved between the operation position and the return position, and a connecting member for connecting the storage lever and the connecting rod. The connection is performed by moving the storage lever toward the operation position. A retractable parking brake device wherein the rod is moved in the axial direction of the operating lever to release the operating lever and the operating lever. 2. The retractable unit according to claim 1, wherein the connecting rod is provided with return means in the axial direction of the operation lever, and the storage rod is moved toward the return position via the connecting member by the connecting rod moved according to the return means. Parking brake device. 3. The operation lever and the operation lever connected via the connection rod are realized by fitting the connection part of the connection rod to both of them, and the operation connection groove in which the connection part is fitted to the operation lever. 2. The retractable parking brake device according to claim 1, wherein at least one of the operation connection grooves into which the connection portion is fitted to the operation lever has a shape that is expanded in the displacement direction of the connection portion. 4. An operating lever pivotally supported on a base member so as to be able to raise and push down, an operating lever that is brought into a braking state in conjunction with the raising of the operating lever, and holding means that holds the operating lever in the braking state in a posture. A connecting rod that is built into the operating lever and is movable in the axial direction of the operating lever to connect or release the operating lever and the operating lever, and is pivotally mounted on the operating lever to rotate and move the connecting rod in the axial direction of the operating lever. The storage lever to be operated, the operation connection groove of the operation lever that guides the connection pin of the connection rod, and the operation connection groove of the operation lever that the connection pin of the connection rod engages. The connecting pin is disengaged from the operating connecting groove to release the connection between the operating lever and the operating lever, and the operation is performed with the operating lever held in the braking state by the holding means. A retractable parking brake device characterized in that the lever can be pushed down. 5. The collapsible unit according to claim 4, wherein the connecting rod is provided with a return means for urging the connecting pin to engage with the operation connecting groove, and the connecting rod moved in accordance with the return means rotates the storage lever. Parking brake device. 6. The retractable parking according to claim 4, wherein at least one of the operation connection groove and the operation connection groove has an expanded shape in which the width of the groove is increased in a direction in which the connection pin is separated from the operation connection groove. Brake device.