KR20100043866A

KR20100043866A - Ball in ramp brake caliper typed parking brake in vehicle

Info

Publication number: KR20100043866A
Application number: KR1020080103097A
Authority: KR
Inventors: 변문환
Original assignee: 현대모비스 주식회사
Priority date: 2008-10-21
Filing date: 2008-10-21
Publication date: 2010-04-29

Abstract

PURPOSE: A parking brake system using ball in ramp typed brake caliper for a vehicle is provided to prevent an invalid stroke by absorbing a slip of a spring seat, due to an elastically returning O-ring while releasing a pressure. CONSTITUTION: A parking brake system using ball in ramp typed brake caliper for a vehicle comprises: a cartridge assembly(2) whose one end is projected from a caliper(1) in order to couple with a parking cable by a flange nut and the other end is installed in a hydraulic forming space in the caliper; an O-ring(10) which is inserted in a seating groove(1b) which is formed in the hydraulic forming space; a spring seat(11) which is fixed to a fixing groove(1a) which is formed on the side of the hydraulic forming space by a fixing protrusion(11a); and a intermediation member(12) which is placed between the O-ring and the spring seat.

Description

Ball in Ramp brake caliper typed parking brake in vehicle}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a parking brake, and more particularly, to a ball-in-lamp brake caliper type parking brake, which compensates for an invalid stroke generation area and improves parking efficiency.

In general, parking brakes used when stopping on inclined road surfaces such as temporary parking of vehicles or hilly roads are pulled by hand, unlike brake devices that press wheels by using hydraulic pressure generated by conventional pedals. It is designed to pressurize the wheel using a cable and operate by operating the parking lever provided on the side of the driver's seat.

The parking brake is a parking brake that is pulled or loosened by a latch assembly (not shown) which is operated according to the operation of a parking lever that is held and operated by a hand and a release knob provided to the lever to release the brake function. It is composed of an equalizer provided between the cable and the left and right cables connected to the left and right rear wheel brakes to distribute the equal operating force.

Such parking brakes typically use a method having a locking function through a strong adhesion generated by pressing the pad toward the drum mounted on the wheel using the parking brake operating force.

In addition, instead of pressing the pad toward the drum, a caliper is used to place the disc plate between the pads to perform braking. A caliper that applies a braking force to the disc plate while configuring the parking brake is also used. Is commonly called a BIR Caliper.

As the BIR caliper pulls the parking brake, the axial movement force is generated inside the BIR caliper through the parking cable. That is, the pulling force of the parking cable is converted into the rotational force of the ramp. By changing the position of the ball, an axial movement force generated by the opposite ramp is generated in accordance with the movement of the ball, and this axial movement force presses the pad toward the disc plate to form the parking braking force. do.

In other words, BIR caliper is the sequence of cable operation → lever rotation → input (rotary) lamp rotation → rolling motion of ball → rotation of output (thrust) lamp → clutch rod forward → piston forward → friction brake (disengage disk rotation) when parking Parking braking.

Here, a spring or the like together with an input / output lamp, which is a component assembled inside the caliper, is commonly referred to as a cartridge assembly. The cartridge assembly is fixed to the outside by being fitted to the caliper body by combining components to improve assemblability. In addition to the spring seat, an O-ring for oil tightness inside the caliper is applied.

However, this BIR caliper is convenient for parking efficiency and layout of the parking cable, but somewhat weak in assembly structure, that is, the spring seat part and the input lamp (outside cartridge) that are assembled into the caliper inner space. As the fixed part structurally forms the play, there is a vulnerability of reducing the parking efficiency by generating an invalid stroke in the process of braking being performed after the piston is moved forward by the action of the input / output ramp.

This is because the O-ring is reduced by the spring seat subjected to the braking hydraulic pressure and the O-ring is elastically restored when the brake is released, so that the spring seat and the caliper body do not maintain close contact. This is due to the formation of a gap Gap having a gap.

Accordingly, the present invention has been invented in view of the above, and a spring seat receiving a braking hydraulic pressure as well as fastening a cartridge assembly constituting an input / output lamp of a BIR caliper (Ball In Ramp Caliper) to a caliper internal space. By attaching a Teflon-mediated member to the seat, the spring seat is absorbed by the O-ring, which is elastically restored when the pressure is released, to prevent the occurrence of invalid strokes, thereby increasing parking efficiency. The purpose is to.

In order to achieve the above object, the present invention provides a parking brake of a ball-in-lamp brake caliper type vehicle, one side of which protrudes out of the caliper so as to be coupled through a parking cable and a flange nut, and the other side of which is positioned toward the piston to push the pad. In the state, provided with a cartridge assembly installed in the internal hydraulic pressure forming space of the caliper,

The O-ring is inserted into a recess groove recessed in the hydraulic space side of the caliper in a state of being fitted to the shaft of the input lamp which exits from the distal end of the caliper so as to be connected to the parking cable.

The spring sheet is coupled to the fixing groove formed in the hydraulic space side of the caliper through the fixing protrusion,

And the intermediate member is positioned between the o-ring and the spring seat.

To this end, the intermediate member is positioned toward the seating groove of the caliper in which the o-ring is fitted, and is made of Teflon material.

According to the present invention, the intervening member of the Teflon material is interposed between the spring seat and the O-ring that are elastically restored while the cartridge assembly constituting the input / output lamp is fastened to the caliper inner space during the braking action. As a result, the spring sheet absorbed by the elastic recovery of the O-ring can be absorbed, thereby preventing an invalid stroke that reduces the parking efficiency.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Since the exemplary embodiments of the present invention may be implemented in various different forms, one of ordinary skill in the art to which the present invention pertains may be described herein. Not limited to the embodiment.

1 is a block diagram illustrating a parking brake of a ball-in-ramp brake caliper type vehicle according to the present invention. The BIR caliper of the present invention implements parking braking using a caliper together with a main brake action. To this end, the caliper 1 has a cartridge assembly 2 which generates an axial movement while rotating when the parking cable is pulled, and moves a piston that pushes the pad toward the disc by the axial movement.

To this end, a parking cable, one end of which is connected to the cartridge assembly 2 and the other end of which is connected to the parking handle, is operated to operate the cartridge assembly 2, and the operation force of the parking handle is evenly pulled toward the left and right wheels. It also has an equalizer.

In addition, the cartridge assembly 2 protrudes out of the caliper 1 so that one side is coupled to the parking cable via the flange nut 9, and the other side is positioned toward the piston Pi to push the pad P. Furnace, the inner pressure forming space of the caliper (1).

This cartridge assembly 2 has an output lamp 4 between the lamps 3 and 4, along with an output lamp 4 which pushes the piston Pi and an input lamp 3 which is rotated via the parking cable. Ball plate 5 having a ball for moving the shaft in an axial direction.

In addition, the cartridge assembly 2 includes a holder housing 8 surrounding the input / output lamps 3 and 4 and the ball plate 5, and a spring 7 and an output lamp 4 for generating elastic restoring force. It is further provided with a clutch rod 6 for converting the rotation of the motor into linear movement, which is a typical configuration of a BIR caliper.

In addition, the cartridge assembly 2 is provided with an o-ring 10 for airtightness of oil filled in the hydraulic space of the caliper 1, and maintains the fastening and holding in the caliper 1 of the cartridge assembly 2. It is further provided with a spring sheet 11 fixed to the caliper (1).

To this end, the o-ring 10 is fitted into a seating groove 1b cut into the caliper 1 in a state of being fitted to the shaft of the input lamp 3 exiting from the tip of the caliper 1 to the outside. Close the hydraulic space of 1) to the outside and apply elastic material to generate elastic restoring force.

In addition, the spring sheet 11 forms a protruding fixing protrusion 11a and is fitted into the fixing groove 1a formed at the side of the hydraulic space of the caliper 1 to support the spring 7 in a shot.

As a result, the spring seat 11 compresses the o-ring 10 while being pushed forward when the braking hydraulic pressure occurs in the state of being positioned to the rear of the o-ring 10, as shown in FIG. When the brake hydraulic pressure is released, it is pushed by the elastic restoring force of the o-ring 10.

However, when the spring sheet 11 is pushed back by the o-ring 10 and returned to the initial state during the compression and restoration of the o-ring 10, in particular, the amount of the spring-sheet 11 is pushed by a large caliper. If a gap is formed without being in close contact with the side of the hydraulic space of (1), an invalid stroke is generated by a gap formed in the spring seat 11 when braking hydraulic pressure is generated, which reduces the parking efficiency. .

Accordingly, the spring sheet 11 is absorbed by the restoration of the o-ring 10 so that the spring sheet 11 does not form a gap with respect to the hydraulic space side surface of the caliper 1. As shown in FIG. 1, the intermediate member 12 is positioned between the o-ring 10 and the spring seat 11.

The intermediate member 12 is made of various materials, but preferably made of a Teflon material having an elastic modulus.

Accordingly, as shown in FIG. 2 (a), the intermediate member 12 is positioned toward the seating groove 1b of the caliper 1 in which the o-ring 10 is fitted, so that the spring seat 11 receives the brake hydraulic pressure. Upon being pushed back, the spring sheet 11 is subjected to a direct pressure, which causes the o-ring 10 to be compressively deformed through the intermediate member 12.

On the contrary, when the brake hydraulic pressure is released, the intermediate member 12 directly receives the elastic restoring force (expansion) generated in the o-ring 10 as shown in FIG. 2 (b). As the elastic restoring force (expansion) generated in the lateral direction is transmitted to the spring sheet 11 via the intermediate member 12, the spring sheet 11 may form a gap with respect to the hydraulic space side of the caliper 1. It is not pushed to an extent, and this makes it possible to prevent the invalid stroke of the cartridge assembly 2 from occurring.

1 is a block diagram of a parking brake of a ball in lamp brake caliper type vehicle according to the present invention.

Figure 2 (a), (b) is a non-effective stroke operation according to the present invention

1: Caliper 1a: Fixing Groove

1b: Settlement groove 2: cartridge assembly

3,4: I / O lamp

5 ball plate 6 clutch rod

7: spring 8: holder housing

9: flange nut 10: o-ring

11: spring seat 11a: fixing protrusion

12: mediated member

P: Pad Pi: Piston

Claims

One side protrudes out of the caliper 1 so as to be coupled via the parking cable and the flange nut 9, and the other side is positioned toward the piston Pi to push the pad P, thereby forming the internal hydraulic pressure of the caliper 1. It is provided with the cartridge assembly 2 installed in the space,

In order to be connected to the parking cable, the O-ring (1b) into the recess groove (1b) cut in the hydraulic space side of the caliper (1) in the state of being fitted to the shaft of the input lamp (3) which exits from the tip of the caliper (1) to the outside 10) is fitted,

The spring sheet 11 is coupled to the fixing groove 1a formed on the hydraulic space side of the caliper 1 via the fixing protrusion 11a,

Parking brake of the ball-in-lamp brake caliper type vehicle, characterized in that the intermediate member 12 is positioned between the o-ring (10) and the spring seat (11).

The parking brake of claim 1, wherein the intermediate member (12) is positioned toward a seating groove (1b) of the caliper (1) in which the o-ring (10) is fitted.

The parking brake of claim 1 or 2, wherein the intermediate member (12) is made of Teflon material.