JPH0539976Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a parking brake operating device for operating a parking brake for a vehicle.

[Prior Art] Generally, this type of parking brake operates by rotating an operating lever to which a grip is attached.
The engagement position of the pole with respect to the sector gear is changed. The parking brake is set to the operating state by pulling the brake operating cable by rotating the operating lever.

Here, the pole is always urged to engage with the sector by a coil spring or the like, but the grip section is provided with an operation knob, and by pressing down this knob, the pole is engaged with the sector. can be released, and by rotating the operating lever while pressing down on the knob, the handbrake can be set to the operating state without making any impact noise.

However, in the direction of rotation of the operating lever mentioned above, the pole can move while disengaging from the sector against the biasing force of the spring without pressing down on the knob, and the driver generally The control lever is rotated without pressing down on the knob.

[Problems to be solved by the invention] As mentioned above, when the operating lever is rotated without pressing down on the operating knob, the pole and the sector engage intermittently, causing a continuous impact sound. will occur.

In recent years, especially in passenger cars, there has been a demand to reduce interior noise as much as possible, and in this type of parking brake, there has been a demand to reduce the above-mentioned impact noise when the pawl and the sector engage. In order to satisfy this requirement, it is effective to reduce the pushing load when engaging the pole with the sector.

By the way, in the conventional structure, the spring that returns and biases the knob when the push of the knob is released also simultaneously biases the pole and the sector into engagement. Therefore, in order to reduce the above-mentioned impact noise, the pressing load of the spring must be reduced.

However, since this spring also serves to bias the knob back, there is a problem in that lowering the pressing load deteriorates the knob operation feeling.

Therefore, the purpose of the present invention is to solve the above-mentioned conventional problems and provide a parking brake operating device that has a simple configuration and can reduce the impact noise when the sector and the pole engage. It's about doing.

[Means for Solving the Problems] The present invention comprises: an operating lever for operating the parking brake; a fixed sector that rotatably supports the operating lever and has locking teeth on its outer periphery; and the operating lever. a pole rotatably supported by a lever and capable of engaging with the sector; an operating knob retractably disposed on a grip portion of the operating lever; movement of the operating knob causes the pole to be moved relative to the sector; a transmission member for rotationally displacing between an engaged position and a non-engaged position; and a biasing force that biases the pole to constantly engage the sector via the transmission member by biasing the operation knob to protrude. A parking brake operating device comprising: a first gear formed at one end of the pole opposite to the sector engagement side; and a first gear rotatably supported by the operating lever and meshing with the first gear. A second gear is provided to reduce the impact noise between the pole and the sector by utilizing the meshing resistance of the first and second gears. Further, it is preferable that the relationship between the length 1 from the rotation center of the pawl to the sector engaging portion and the length 2 from the rotation center to the first gear is 1<2.

[Operation] In the present invention, when the pole rotates, the first gear formed on the pole and the second gear supported by the operating lever always mesh to move the pole. When a force is applied, the first gear causes the second gear to rotate.

Therefore, when the pole moves while disengaging from the sector against the biasing force of the biasing member, such as when the operating lever is rotated without pressing down the operating knob. Even when the tip of the pole passes over the peak of the sector and moves to the next peak, the first and second gears are engaged, so the meshing resistance of these gears acts and the pole moves to the next peak. The return speed when colliding with can be reduced.

For this reason, compared to the conventional case in which the pole completely climbs over the mountain of the sector according to the biasing force of the biasing member, in the present invention, the gear resistance during rotation of the second gear is used. Since the return rotation of the pawl is relaxed, it is possible to significantly reduce the impact noise when the pawl and sector are engaged intermittently.

In addition, if the lever ratio from the center of rotation of the pole to the sector engagement part and the first gear is set to 1<2, the amount of rotation of the second gear can be secured at a predetermined level, so that the rotation of the gear when the pole swings is set to 1<2. meshing resistance,
It can be secured to an extent that contributes to the reduction of impact noise.

[Embodiments] The present invention will be specifically described below with reference to illustrated embodiments.

In FIG. 1, the sector 20 has engaging teeth 20a on the fan-shaped outer periphery with the center position O1, and is fixed to the vehicle body 22.

This sector 20 is provided with an operating lever 30 that is rotatable about a rotating shaft 24 located at the center O1. This operating lever 30
A brake actuation cable 32 is connected to one end on the right side of the center O1, and by pulling the cable 32 by rotating the operating lever 30, the parking brake is actuated.

Further, one end on the left side of the center O1 of the operating lever 30 has a shape in which an end inclined diagonally upward extends horizontally, and the horizontal end is curled into a cylindrical shape to form a horizontal cylindrical part 30a. A grip 34 is inserted into and supported.

Further, at the end of the grip 34, a pushable operation knob 36 is disposed so as to be freely protrusive and retractable. stoppa 30
A compression coil spring 40, which is an example of a biasing member, is disposed between the spring 40 and the spring 40b.

The operation knob 36 is made of resin, for example,
A rod 50, which is an example of a transmission member having one end fixed to a shaft, is connected within this resin.

Next, the rod 50 and the pole 60 that rotates in conjunction with the movement of the rod 50 will be explained.

First, the pawl 60 will be explained. This pawl is rotatably supported around a rotating shaft 62 provided on the operating lever 30. Note that this rotation center is O2.

The tip of this pawl 60 is a pawl 64 that engages with the engaging teeth 20a of the sector 20.

Further, an arc-shaped first gear 66 is formed at the other end of the pole 60. A length 1 from the rotation center O2 of the pawl 60 to the pawl 64, and a length 2 from the rotation center O2 to the first gear 66.
The relationship is set as 1<2.

Further, the rod 50 for rotationally displacing the pawl 60 is rotatably connected at a predetermined position on one end side of the pawl 60 where the first gear 66 is formed.

Further, a second gear 70 is rotatably supported on the inner surface of the operating lever 30 so as to mesh with a first gear formed on the pawl 60.

Next, the effect will be explained.

The compression coil spring 40 presses and biases the operating knob 36 so that it always protrudes from the grip 34, and by biasing the operating knob 36 to protrude, the pawl 60 is pushed through the rod 50 into the engagement teeth of the sector 20. It acts to engage and bias 20a.

Here, if you want to operate the parking brake, rotate the operating lever 30 around the center O1, and engage the pawl 64 of the pawl 60 with the engaging teeth 20a of the sector 20 at this rotated position. , the cable 32 can be maintained in a tensioned state, and the parking brake can be maintained in an activated state.

In addition, when applying the brake, the grip 34 can be lifted diagonally upward, but at this time, the operation knob 36
It is not necessarily necessary to press . That is,
This is because the pawl 64 can move in the above rotational direction while disengaging from the engagement tooth 20a against the biasing force of the spring 40.

At this time, the pawl 64 and the engagement tooth 20a engage intermittently, but in this embodiment, it is possible to reduce the impact noise at this time.

Here, in order for the operation lever 30 to rotate around the rotation center O1, the pawl 64 of the pawl 60 must be aligned with the peak of the engagement tooth 20a of the sector 20 (20a in FIG. 2).
1, 20a2,...) one after another is essential, and for this purpose the pole 60 is
The operation of rotating clockwise to disengage the engagement tooth 20a as shown in FIG.
It is necessary to repeat the operation in which the pawl 60 rotates counterclockwise and engages with the engagement tooth 20a as shown in FIG.

In the conventional structure, the counterclockwise rotation of the pawl 60 was performed by the biasing force of the spring 40, so the impact noise at that time was loud.

In this embodiment as well, the rotation of the pawl 60 in the counterclockwise direction is still performed by the biasing force of the spring 40.
The biasing force of 0 is not applied directly to the engagement operation of the pawl 64, but is relaxed by the meshing of the first and second gears 66 and 70.

That is, when the pawl 60 swings around the rotation center O2 to ensure the rotational movement of the operating lever 30, the first gear 66 provided at one end of the pawl 60 also swings. become. Since the first gear 66 is always in mesh with the second gear 70 rotatably supported by the operating lever 30, the second gear 70 is rotated by the swing of the pawl 60. It turns out. Conversely, unless the second gear 70 rotates, the pole 60 will not swing.

In this way, since the swinging of the pawl 60 is accompanied by the rotation of the second gear 70, especially when the pawl 60 is about to rotate counterclockwise, the spring 40 must first be rotated. Power is pole 60
However, when the pawl 60 rotates due to this biasing force, the second gear 70 is always rotated, and as a result, the pawl 64
will engage with the engaging teeth 20a of the sector 20.

For this reason, the pawl 64 is connected to the spring 4 as in the conventional case.
Compared to the case where the gears 66 and 7 are directly engaged with each other with a biasing force of 0, in this embodiment, the first and second gears 66, 7
The return speed of the pawl 60 is reduced by the amount of meshing resistance of 0, so that the collision between the pawl 64 and the engagement tooth 20a can be significantly alleviated. Therefore,
Impact sound can be reduced.

Note that if the lever ratio of the pawl 60 is set to 1<2, the amount of rotation of the second gear 70 can be ensured at a predetermined level, so that the meshing resistance of the gears when the pawl 60 swings can be reduced to a level that contributes to the reduction of impact noise. can be secured.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention.

For example, the above embodiment is an example of the engagement method between the pole and the transmission member, and in the case of pin coupling, the rod 50 moves up and down when the pole 60 swings, so the rod 50 is attached to the notch of the pole 60. The rod may be engaged with the rod to perform a rotational movement, and the vertical movement may be absorbed by sliding between the abutting portion of the notch and the rod.

[Effects of the invention] As explained above, according to the invention, the first gear is provided at one end of the pole, and the second gear is rotatably supported by the operating lever and meshes with the first gear. By providing this, when the pole climbs over the peak of the sector and comes into contact with the next peak, the return speed of the pole is reduced compared to when the biasing force of the biasing member is applied directly by the gear resistance. Therefore, even when the operating lever is operated such that the pole and the sector are intermittently engaged, the impact noise can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of an embodiment of a parking brake operating device to which the present invention is applied; FIG.
B is a schematic explanatory diagram for explaining the swinging operation of the pole. 20... Sector, 20a... Engaging tooth, 30...
...Operation lever, 36...Operation knob, 40...Biasing member, 50...Transmission member, 60...Pole, 66
...First gear, 70...Second gear.

Claims (1)

[Claims for Utility Model Registration] An operating lever for operating a parking brake; a fixed sector rotatably supporting the operating lever and having teeth on its outer periphery; rotatably supported by the operating lever; a pole that can be engaged with the sector; an operating knob that is retractably disposed on a grip portion of the operating lever; and movement of the operating knob causes the pole to be placed in an engaged position and a non-engaged position with respect to the sector. A parking brake operating device comprising: a transmission member that rotationally displaces the operating knob; and a biasing member that biases the pole so as to constantly engage the sector via the transmission member by biasing the operation knob to protrude. A first gear formed at one end of the pole opposite to the sector engagement side, and a second gear rotatably supported by the operating lever and meshing with the first gear. , A parking brake operating device characterized in that the impact noise between the pole and the sector is reduced by using the meshing resistance of the first and second gears.