KR20100048023A - Ball in ramp brake caliper typed parking brake in vehicle - Google Patents

Abstract

PURPOSE: A parking brake which a ball in ramp caliper brake is provided to continuously push a caliper body by a spring and to prevent an inefficiency stroke during braking by adding a spring function to a retainer which fixes a cartridge assembly to a caliper body. CONSTITUTION: A parking brake which a ball in ramp caliper brake comprises a cartridge assembly(3) whose one end is extruded to the outside of a caliper(1) in order to combining with a parking cable by a flange nut and the other end is placed towards the piston(2) in order to push a pad. The cartridge assembly is installed in a hydraulic pressure forming space of the caliper. An input lamp shaft(4) which forms the cartridge assembly, passes through the leading end body(1a) of the caliper and is connected to the parking cable. A retainer(6) which is fixed on the leading body by inserting the input lamp shaft presses the caliper.

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 brake the caliper. Is commonly called a BIR Caliper (Ball In Ramp 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 is somewhat weak in the assembly structure, that is, the spring seat and the input lamp (outside the cartridge) assembled into the space inside the caliper are fixed. As the clearance is formed structurally, after the clutch rod advances by the action of the input / output lamp, there is a vulnerability to reduce the parking efficiency by generating an invalid stroke while the piston moves forward and brakes.

Accordingly, the present invention has been invented in view of the above, and the spring function is added to the retainer for fixing the cartridge assembly constituting the input / output lamp of the BIR caliper (Ball In Ramp Caliper) to the caliper. The purpose of this is to continuously push the caliper body in the state to eliminate structurally generated assembly gaps, thereby preventing the generation of invalid strokes that reduce the parking efficiency during parking braking.

The present invention for achieving the above object, the ball-in-lamp brake caliper-type parking brake is projected out of the caliper so that one side is coupled via the parking cable and the flange nut, the other side is positioned toward the piston to push the pad A cartridge assembly installed in the internal hydraulic pressure forming space of the caliper,

The retainer, which is fitted to the input lamp shaft and fixed to the front body, pushes the caliper so that the input lamp shaft connected to the parking cable from the outside through the front body of the caliper is fixed to the caliper while forming the cartridge assembly. Characterized in that configured to.

To this end, the retainer is composed of an annular body in which both ends are split and the input lamp shaft is fitted, and a spring protrusion protruding to the edge of the annular body, and the spring protrusion is formed in plural at equal intervals.

According to the present invention, a spring action is applied to the retainer for fixing the cartridge assembly constituting the input / output lamp to the caliper body side when the braking action, so that the assembly gap between the parts is removed through pressurizing the caliper body of the retainer, There is an effect of increasing the parking efficiency by removing the invalid stroke.

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 3 which generates an axial movement while rotating when the parking cable is pulled and moves the piston 2 which 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 3 and the other end of which is connected to the parking handle, is operated to operate the cartridge assembly 3, and the operating force of the parking handle is equally distributed to the left and right wheels. It also has an equalizer to be pulled out.

In addition, the cartridge assembly (3) is protruded out of the caliper (1) so that one side is coupled via the parking cable and the flange nut, the other side is located toward the piston (2) to push the pad, the caliper (1) Is installed into the internal hydraulic pressure forming space.

This cartridge assembly 3 has an output lamp for pushing the input lamp 4 and the piston 2 rotated through the parking cable, and a ball having a ball for axially moving the output lamp between the lamps. A plate.

In addition, the input / output lamp and the ball plate are wrapped in a holder housing, and the spring generating elastic restoring force is elastically supported on the spring seat fixed to the hydraulic space side of the caliper, and the rotation of the output lamp is prevented. It is further provided with the clutch rod which switches to linear movement, and moves the piston 2 to an axial direction.

In addition, the cartridge assembly (3) is provided with an o-ring (5) for the airtightness of the oil filled in the hydraulic space of the caliper (1), such an o-ring (5) is the front end body (1a) of the caliper (1) It is fitted to the caliper body in the state of being fitted to the shaft of the input lamp 4 exiting from the outside to the outside, which is a typical configuration of a BIR caliper.

In addition, the cartridge assembly 3 further includes a retainer 6 which penetrates the front end body 1a of the caliper 1 and fixes the input ramp shaft 4 to which the parking cable is connected. 6) serves to fix the input ramp shaft 4 to the caliper 1 normally.

The retainer 6 acts to remove the invalid stroke by removing the assembly gap between the parts assembled to the caliper 1 by continuously pressing the caliper 1 together with the fixing action of the input ramp shaft 4. Done.

To this end, the retainer 6 is provided with a spring action, which forms a spring projection 8 protruding to the edge of the annular body 7 in which both ends are split and the input ramp shaft 4 is fitted.

As such, the spring protrusion 8 is made to continuously press the caliper (1) in the assembled state, and is preferably formed in plurality at equal intervals of one or more so as to apply a uniform pressing force.

Accordingly, the cartridge assembly 3 is positioned and assembled into the hydraulic space of the caliper 1, and the retainer 6 fixes the input ramp shaft 4 that has penetrated the front end body 1a of the caliper 1. In addition, the spring protrusion (8) of the retainer (6) is continuously pushed and pushed the tip body (1a) of the caliper (1).

As the caliper 1 is pushed by this pressing force, the assembly gap formed by the parts of the cartridge assembly 3 assembled in the caliper 1 is naturally removed, thereby eliminating the invalid stroke of the cartridge assembly 3 during operation. Will be removed.

At this time, the spring force magnitude generated by the spring projection 8 of the retainer 6 is a size that overcomes the advancement force of the cartridge assembly 3 by the oil filled in the hydraulic space of the caliper 1 during operation. This is because the invalid stroke is due to the forward and return action occurring in the cartridge assembly 3.

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

    <Description of the symbols for the main parts of the drawings>

1: Caliper 1a: Tip Body

2: piston 3: cartridge assembly

4: input ramp shaft 5: o-ring

6: retainer 7: annular body

8: spring turning

Claims (3)

One side of the cartridge assembly protrudes out of the caliper (1) to engage the parking cable and the flange nut, and the other side is installed into the internal hydraulic pressure forming space of the caliper (1) with the side positioned toward the piston (2) to push the pad. (3) provided, The input lamp shaft 4 is fixed to the caliper body so that the input lamp shaft 4 which penetrates the front end body 1a of the caliper 1 and is connected to the parking cable from the outside while forming the cartridge assembly 3 is fixed to the caliper body. Ball-in-lamp brake caliper type parking brake, characterized in that the retainer (6) is inserted and fixed to the front end body (1a) is configured to apply a pressing force for pushing the caliper (1). 2. The retainer (6) according to claim 1, wherein the retainer (6) consists of an annular body (7) on which both ends are split so that the input lamp shaft (4) is fitted, and a spring protrusion (8) protruding from the edge of the annular body (7). Ball in lamp brake caliper type parking brake characterized by the above-mentioned. The ball-in-lamp brake caliper type parking brake according to claim 2, wherein the spring protrusion (8) is formed in plural with equal intervals.

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